id
stringlengths 9
16
| submitter
stringlengths 1
64
⌀ | authors
stringlengths 3
36.7k
| title
stringlengths 1
382
| comments
stringlengths 1
1.15k
⌀ | journal-ref
stringlengths 1
557
⌀ | doi
stringlengths 7
153
⌀ | report-no
stringlengths 1
479
⌀ | categories
stringlengths 5
125
| license
stringclasses 9
values | abstract
stringlengths 6
6.09k
| versions
list | update_date
timestamp[s] | authors_parsed
sequence |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0707.3530 | Zaven Akopov N | N. Akopov, Z. Akopov, G. Aslanyan, L. Grigoryan | $A$-dependence of coherent electroproduction of $\rho^{0}$ mesons on
nuclei in forward direction | null | null | null | null | hep-ph | null | This article presents the $A$-dependence of the differential cross section
for the coherent electroproduction of vector mesons on nuclei in forward
direction, at fixed values of longitudinal momentum transfer $q_{L}$. It is
shown that such cross section has complicated behavior over the atomic mass
number $A$ with local minimums and maximums. It is also shown that a ratio of
the real to the imaginary parts of the forward coherent amplitude on nuclei
$\alpha_{A} = \Re e{f_{A}} / \Im m{f_{A}}$ has breaking points at some values
of $A$. Comparison of the behaviors of the normalized cross section
$\Big(\frac{d\sigma}{d\Omega}\Big)_{A}\Big/\Big(\frac{d\sigma}{d\Omega}\Big)_{N}$
and $\alpha_{A}$ over $A$ shows that the location of minimums of the cross
section are very close to the breaking points of $\alpha_{A}$.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 11:53:29 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Akopov",
"N.",
""
],
[
"Akopov",
"Z.",
""
],
[
"Aslanyan",
"G.",
""
],
[
"Grigoryan",
"L.",
""
]
] |
0707.3531 | Luis Nunez A | J. L. Chaves, G. Diaz, V. Hamar, R. Isea, F. Rojas, N. Ruiz, R.
Torrens, M. Uzcategui, J. Florez-Lopez, H. Hoeger, C. Mendoza, L. A. Nunez | e-Science initiatives in Venezuela | 9 pages, 4 figures | Procceedings Spanish Conference on e-Science Grid Computing, J.
Casado, R. Mayo y R. Munoz (Editors) CIEMAT, Madrid Spain (2007), pp 45 - 52 | null | null | cs.CE cs.DC | null | Within the context of the nascent e-Science infrastructure in Venezuela, we
describe several web-based scientific applications developed at the Centro
Nacional de Calculo Cientifico Universidad de Los Andes (CeCalCULA), Merida,
and at the Instituto Venezolano de Investigaciones Cientificas (IVIC), Caracas.
The different strategies that have been followed for implementing quantum
chemistry and atomic physics applications are presented. We also briefly
discuss a damage portal based on dynamic, nonlinear, finite elements of lumped
damage mechanics and a biomedical portal developed within the framework of the
\textit{E-Infrastructure shared between Europe and Latin America} (EELA)
initiative for searching common sequences and inferring their functions in
parasitic diseases such as leishmaniasis, chagas and malaria.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:00:43 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Chaves",
"J. L.",
""
],
[
"Diaz",
"G.",
""
],
[
"Hamar",
"V.",
""
],
[
"Isea",
"R.",
""
],
[
"Rojas",
"F.",
""
],
[
"Ruiz",
"N.",
""
],
[
"Torrens",
"R.",
""
],
[
"Uzcategui",
"M.",
""
],
[
"Florez-Lopez",
"J.",
""
],
[
"Hoeger",
"H.",
""
],
[
"Mendoza",
"C.",
""
],
[
"Nunez",
"L. A.",
""
]
] |
0707.3532 | Micha{\l} Rams | Joanna Jaroszewska, Michal Rams | On the Hausdorff dimension of invariant measures of weakly contracting
on average measurable IFS | 16 pages; to appear in Journal of Stat. Phys | null | 10.1007/s10955-008-9566-3 | null | math.DS math.PR | null | We consider measures which are invariant under a measurable iterated function
system with positive, place-dependent probabilities in a separable metric
space. We provide an upper bound of the Hausdorff dimension of such a measure
if it is ergodic. We also prove that it is ergodic iff the related skew product
is.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:29:27 GMT"
},
{
"version": "v2",
"created": "Tue, 6 May 2008 15:20:26 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Jaroszewska",
"Joanna",
""
],
[
"Rams",
"Michal",
""
]
] |
0707.3533 | Kazuhiro Nagata | Alessandro D'Adda, Issaku Kanamori, Noboru Kawamoto, Kazuhiro Nagata | Exact Extended Supersymmetry on a Lattice: Twisted N=4 Super Yang-Mills
in Three Dimensions | 17 pages, 11 figures; v2 a reference added; v3 appendix added | Nucl.Phys.B798:168-183,2008 | 10.1016/j.nuclphysb.2008.01.026 | DFTT 2007/15, EPHOU 07-004, RIKEN-TH-111 | hep-lat hep-th | null | We propose a lattice formulation of three dimensional super Yang-Mills model
with a twisted N=4 supersymmetry. The extended supersymmetry algebra of all the
eight supercharges is fully and exactly realized on the lattice with a modified
"Leibniz rule". The formulation we employ here is a three dimensional extension
of manifestly gauge covariant method which was developed in our previous
proposal of Dirac-Kaehler twisted N=2 super Yang-Mills on two dimensional
lattice. The twisted N=4 supersymmetry algebra is geometrically realized on a
three dimensional lattice with link supercharges and the use of "shifted"
(anti-)commutators. A possible solution to the recent critiques on the link
formulation will be discussed.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:26:20 GMT"
},
{
"version": "v2",
"created": "Thu, 16 Aug 2007 00:49:58 GMT"
},
{
"version": "v3",
"created": "Sat, 26 Jan 2008 02:40:38 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"D'Adda",
"Alessandro",
""
],
[
"Kanamori",
"Issaku",
""
],
[
"Kawamoto",
"Noboru",
""
],
[
"Nagata",
"Kazuhiro",
""
]
] |
0707.3534 | Damien Chablat | Damien Chablat (IRCCyN), St\'ephane Caro (IRCCyN) | The Kinetostatic Optimization of a Novel Prismatic Drive | null | Dans 12th World Congress in Mechanism and Machine Science - 12th
World Congress in Mechanism and Machine Science, Besan\c{c}on : France
(06/2007) | null | null | cs.RO | null | The design of a mechanical transmission taking into account the transmitted
forces is reported in this paper. This transmission is based on Slide-o-Cam, a
cam mechanism with multiple rollers mounted on a common translating follower.
The design of Slide-o-Cam, a transmission intended to produce a sliding motion
from a turning drive, or vice versa, was reported elsewhere. This transmission
provides pure-rolling motion, thereby reducing the friction of rack-and-pinions
and linear drives. The pressure angle is a suitable performance index for this
transmission because it determines the amount of force transmitted to the load
vs. that transmitted to the machine frame. To assess the transmission
capability of the mechanism, the Hertz formula is introduced to calculate the
stresses on the rollers and on the cams. The final transmission is intended to
replace the current ball-screws in the Orthoglide, a three-DOF parallel robot
for the production of translational motions, currently under development for
machining applications at Ecole Centrale de Nantes.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:18:05 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Caro",
"Stéphane",
"",
"IRCCyN"
]
] |
0707.3535 | Jamil Tahir-Kheli | Jamil Tahir-Kheli and William A. Goddard III (California Institute of
Technology) | Chiral Plaquette Polaron Theory of Cuprate Superconductivity | 32 pages, 17 figures | Phys. Rev. B vol. 76, 014514 (2007) | 10.1103/PhysRevB.76.014514 | null | cond-mat.supr-con cond-mat.str-el | null | Ab-initio density functional calculations on explicitly doped
La(2-x)Sr(x)CuO4 find doping creates localized holes in out-of-plane orbitals.
A model for superconductivity is developed based on the assumption that doping
leads to the formation of holes on a four-site Cu plaquette composed of the
out-of-plane A1 orbitals apical O pz, planar Cu dz2, and planar O psigma. This
is in contrast to the assumption of hole doping into planar Cu dx2-y2 and O
psigma orbitals as in the t-J model. Interaction of holes with the d9 spin
background leads to chiral polarons with either a clockwise or anti-clockwise
charge current. When the polaron plaquettes percolate through the crystal at
x~0.05 for LaSrCuO, a Cu dx2-y2 and planar O psigma band is formed. Spin
exchange Coulomb repulsion with chiral polarons leads to D-wave
superconductivity. The equivalent of the Debye energy in phonon
superconductivity is the maximum energy separation between a chiral polaron and
its time-reversed partner. An additive skew-scattering contribution to the Hall
effect is induced by chiral polarons and leads to a temperature dependent Hall
effect that fits the measured values for LaSrCuO. The integrated imaginary
susceptibility satisfies omega/T scaling due to chirality and spin-flip
scattering of polarons along with a uniform distribution of polaron energy
splittings. The derived functional form is compatible with experiments. The
static spin structure factor is computed and is incommensurate with a
separation distance from (pi,pi) given by ~(2pi)x. Coulomb scattering of the
x2-y2 band with polarons leads to linear resistivity. Coupling of the x2-y2
band to the undoped Cu d9 spins leads to the ARPES pseudogap and its doping and
temperature dependence.
| [
{
"version": "v1",
"created": "Mon, 23 Jul 2007 22:02:00 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Tahir-Kheli",
"Jamil",
"",
"California Institute of\n Technology"
],
[
"Goddard",
"William A.",
"III",
"California Institute of\n Technology"
]
] |
0707.3536 | Patrick Erik Bradley | Patrick Erik Bradley | Degenerating families of dendrograms | 13 pages, 8 figures | J. Classif. 25, 27-42 (2008) | 10.1007/s00357-008-9009-5 | null | stat.ML | null | Dendrograms used in data analysis are ultrametric spaces, hence objects of
nonarchimedean geometry. It is known that there exist $p$-adic representation
of dendrograms. Completed by a point at infinity, they can be viewed as
subtrees of the Bruhat-Tits tree associated to the $p$-adic projective line.
The implications are that certain moduli spaces known in algebraic geometry are
$p$-adic parameter spaces of (families of) dendrograms, and stochastic
classification can also be handled within this framework. At the end, we
calculate the topology of the hidden part of a dendrogram.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:45:39 GMT"
}
] | 2008-06-28T00:00:00 | [
[
"Bradley",
"Patrick Erik",
""
]
] |
0707.3537 | Kazuhiro Nagata | Steven Gottlieb, Heechang Na, Kazuhiro Nagata | Diquark Representations for Singly Heavy Baryons with Light Staggered
Quarks | v1, 13 pages with title "Staggered Diquarks for Singly Heavy
Baryons"; v2, 4 pages in revtex, changed the title to be more specific | Phys.Rev.D77:017505,2008 | 10.1103/PhysRevD.77.017505 | null | hep-lat | null | In the staggered fermion formulation of lattice QCD, we construct diquark
operators which are to be embedded in singly heavy baryons. The group
theoretical connections between continuum and lattice staggered diquark
representations are established.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:54:19 GMT"
},
{
"version": "v2",
"created": "Thu, 31 Jan 2008 19:24:54 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Gottlieb",
"Steven",
""
],
[
"Na",
"Heechang",
""
],
[
"Nagata",
"Kazuhiro",
""
]
] |
0707.3538 | Ulrich Nierste | Ulrich Nierste | Bounds on new physics from B_s mixing | Talk at "CTP Symposium On Supersymmetry At LHC: Theoretical And
Experimental Prospectives", 11-14 Mar 2007, Cairo, Egypt | Int.J.Mod.Phys.A22:5986-5996,2007 | 10.1142/S0217751X07039171 | TTP07-18 | hep-ph | null | I summarize the observables constraining the B_s-B_s-bar mixing complex and
present a new calculation of the element Gamma_{12}^s of the decay matrix.
Gamma_{12}^s enters the prediction of the width difference Delta Gamma_s, for
which we obtain Delta Gamma_s^SM = 0.088 +/- 0.017 ps^(-1), if no new physics
enters B_s-B_s-bar mixing. Applying our formulae to Tevatron data we find a
deviation of the B_s-B_s-bar mixing phase phi_s from its Standard Model value
by 2 standard deviations. I stress that present data do not give any
information on the sign of Delta Gamma_s.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:49:58 GMT"
}
] | 2010-11-03T00:00:00 | [
[
"Nierste",
"Ulrich",
""
]
] |
0707.3539 | Jes\'us Clemente-Gallardo | J. F. Carinena, J. Clemente-Gallardo and G. Marmo | Introduction to Quantum Mechanics and the Quantum-Classical transition | Survey paper based on the lectures delivered at the XV International
Workshop on Geometry and Physics Puerto de la Cruz, Tenerife, Canary Islands,
Spain September 11-16, 2006. To appear in Publ. de la RSME | null | null | null | quant-ph | null | In this paper we present a survey of the use of differential geometric
formalisms to describe Quantum Mechanics. We analyze Schroedinger and
Heisenberg frameworks from this perspective and discuss how the momentum map
associated to the action of the unitary group on the Hilbert space allows to
relate both approaches. We also study Weyl-Wigner approach to Quantum Mechanics
and discuss the implications of bi-Hamiltonian structures at the quantum level.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 12:58:24 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Carinena",
"J. F.",
""
],
[
"Clemente-Gallardo",
"J.",
""
],
[
"Marmo",
"G.",
""
]
] |
0707.3540 | Patrick Erik Bradley | Patrick Erik Bradley | Mumford dendrograms | 16 pages, 7 figures; Incorporating Special Issue: Ultrametric and
p-Adic Applications in Computer Science | The Computer Journal, Vol. 53, No. 4 (2010), 393-404 | 10.1093/comjnl/bxm088 | null | cs.DM | null | An effective $p$-adic encoding of dendrograms is presented through an
explicit embedding into the Bruhat-Tits tree for a $p$-adic number field. This
field depends on the number of children of a vertex and is a finite extension
of the field of $p$-adic numbers. It is shown that fixing $p$-adic
representatives of the residue field allows a natural way of encoding strings
by identifying a given alphabet with such representatives. A simple $p$-adic
hierarchic classification algorithm is derived for $p$-adic numbers, and is
applied to strings over finite alphabets. Examples of DNA coding are presented
and discussed. Finally, new geometric and combinatorial invariants of time
series of $p$-adic dendrograms are developped.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:00:17 GMT"
}
] | 2010-05-18T00:00:00 | [
[
"Bradley",
"Patrick Erik",
""
]
] |
0707.3541 | Jun Hasegawa | Jun Hasegawa, Masahito Hayashi, Tohya Hiroshima, Akihisa Tomita | Security analysis of decoy state quantum key distribution incorporating
finite statistics | 13 pages, 4 figures | null | null | null | quant-ph | null | Decoy state method quantum key distribution (QKD) is one of the promising
practical solutions to BB84 QKD with coherent light pulses. In the real world,
however, statistical fluctuations with the finite code length cannot be
negligible, and the securities of theoretical and experimental researches of
the decoy method state QKD so far are based on the asymptotic GLLP's formula
which guarantees only that the limit of eavesdropper's information becomes zero
as the code length approaches infinity. In this paper, we propose a
substantially improved decoy state QKD in the framework of the finite code
length and derive the upper bound of eavesdropper's information in the finite
code length decoy state QKD with arbitrary number of decoy states of different
intensities incorporating the finite statistics. We also show the performance
of our decoy QKD and optimal values of parameters by numerical simulation.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:16:54 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Hasegawa",
"Jun",
""
],
[
"Hayashi",
"Masahito",
""
],
[
"Hiroshima",
"Tohya",
""
],
[
"Tomita",
"Akihisa",
""
]
] |
0707.3542 | Cezary Sliwa | C. Sliwa, T. Dietl | Electron-hole contribution to the apparent s-d exchange interaction in
III-V diluted magnetic semiconductors | 9 pages, 6 figures; in this version the value of the bound hole
g-factor is corrected and cond-mat/0505126 is included as section VI | Physical Review B 78, 165205 (2008) | 10.1103/PhysRevB.78.165205 | null | cond-mat.mtrl-sci cond-mat.str-el | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin splitting of photoelectrons in p-type and electrons in n-type III-V
Mn-based diluted magnetic semiconductors is studied theoretically. It is
demonstrated that the unusual sign and magnitude of the apparent s-d exchange
integral reported for GaAs:Mn arises from exchange interactions between
electrons and holes bound to Mn acceptors. This interaction dominates over the
coupling between electrons and Mn spins, so far regarded as the main source of
spin-dependent phenomena. A reduced magnitude of the apparent s-d exchange
integral found in n-type materials is explained by the presence of repulsive
Coulomb potentials at ionized Mn acceptors and a bottleneck effect.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:13:14 GMT"
},
{
"version": "v2",
"created": "Thu, 26 Jul 2007 13:40:37 GMT"
},
{
"version": "v3",
"created": "Thu, 27 Nov 2008 18:06:52 GMT"
}
] | 2009-04-16T00:00:00 | [
[
"Sliwa",
"C.",
""
],
[
"Dietl",
"T.",
""
]
] |
0707.3543 | Matthias Baenninger | Matthias Baenninger, Arindam Ghosh, Michael Pepper, Harvey E. Beere,
Ian Farrer, Paula Atkinson and Dave A. Ritchie | Quantisation of Hopping Magnetoresistance Prefactor in Strongly
Correlated Two-Dimensional Electron Systems | 5 pages, 3 figures, Proceedings of EP2DS 17, Reference added | null | 10.1016/j.physe.2007.08.099 | null | cond-mat.mes-hall cond-mat.str-el | null | We report an universal behaviour of hopping transport in strongly interacting
mesoscopic two-dimensional electron systems (2DES). In a certain window of
background disorder, the resistivity at low perpendicular magnetic fields
follows the expected relation $\rho(B_\perp) = \rho_{\rm{B}}\exp(\alpha
B_\perp^2)$. The prefactor $\rho_{\rm{B}}$ decreases exponentially with
increasing electron density but saturates to a finite value at higher
densities. Strikingly, this value is found to be universal when expressed in
terms of absolute resistance and and shows quantisation at $R_{\rm{B}}\approx
h/e^2$ and $R_{\rm{B}}\approx 1/2$ $ h/e^2$. We suggest a strongly correlated
electronic phase as a possible explanation.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:38:06 GMT"
},
{
"version": "v2",
"created": "Fri, 27 Jul 2007 21:47:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Baenninger",
"Matthias",
""
],
[
"Ghosh",
"Arindam",
""
],
[
"Pepper",
"Michael",
""
],
[
"Beere",
"Harvey E.",
""
],
[
"Farrer",
"Ian",
""
],
[
"Atkinson",
"Paula",
""
],
[
"Ritchie",
"Dave A.",
""
]
] |
0707.3544 | Grigory Volovik | J. Elbs, Yu. M. Bunkov, E. Collin, H. Godfrin and G. E. Volovik | Strong orientational effect of stretched aerogel on the 3He order
parameter | 4 pages, 3 figures, revtex, submitted to PRL | Phys. Rev. Lett. 100, 215304 (2008) | 10.1103/PhysRevLett.100.215304 | null | cond-mat.soft cond-mat.dis-nn nlin.AO | null | Deformation of aerogel strongly modifies the orientation of the order
parameter of superfluid 3He confined in aerogel. We used a radial squeezing of
aerogel to keep the orbital angular momentum of the 3He Cooper pairs in the
plane perpendicular to the magnetic field. We did not find strong evidence for
a "polar" phase, with a nodal line along the equator of the Fermi surface,
predicted to occur at large radial squeezing. Instead we observed 3He-A with a
clear experimental evidence of the destruction of the long-range order by
random anisotropy -- the Larkin-Imry-Ma effect. In 3He-B we observed and
identified new modes of NMR, which are impossible to obtain in bulk 3He-B. One
of these modes is characterized by a repulsive interaction between magnons,
which is suitable for the magnon Bose-Einstein condensation (BEC).
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:44:23 GMT"
},
{
"version": "v2",
"created": "Fri, 7 Dec 2007 13:03:34 GMT"
},
{
"version": "v3",
"created": "Wed, 23 Apr 2008 07:47:15 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Elbs",
"J.",
""
],
[
"Bunkov",
"Yu. M.",
""
],
[
"Collin",
"E.",
""
],
[
"Godfrin",
"H.",
""
],
[
"Volovik",
"G. E.",
""
]
] |
0707.3545 | Federico Bassetti | F. Bassetti, M. Cosentino Lagomarsino, S. Mandr\'a | Exchangeable Random Networks | to appear on "Internet Mathematics" | Internet Mathematics, 4 (4), 2007 | 10.1080/15427951.2007.10129152 | null | math.PR math.ST stat.TH | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce and study a class of exchangeable random graph ensembles. They
can be used as statistical null models for empirical networks, and as a tool
for theoretical investigations. We provide general theorems that carachterize
the degree distribution of the ensemble graphs, together with some features
that are important for applications, such as subgraph distributions and kernel
of the adjacency matrix. These results are used to compare to other models of
simple and complex networks. A particular case of directed networks with
power-law out--degree is studied in more detail, as an example of the
flexibility of the model in applications.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:33:37 GMT"
},
{
"version": "v2",
"created": "Tue, 12 Aug 2008 13:30:30 GMT"
}
] | 2020-01-09T00:00:00 | [
[
"Bassetti",
"F.",
""
],
[
"Lagomarsino",
"M. Cosentino",
""
],
[
"Mandrá",
"S.",
""
]
] |
0707.3546 | Dmitri Petrov | Giorgio Volpe, Giovanni Volpe, Dmitri Petrov | Singular point characterization in microscopic flows | 4 pages and 4 figures | Phys. Rev. E 77, 037301 (2008) | 10.1103/PhysRevE.77.037301 | null | physics.optics physics.flu-dyn | null | We suggest an approach to microrheology based on optical traps in order to
measure fluid fluxes around singular points of fluid flows. We experimentally
demonstrate this technique, applying it to the characterization of controlled
flows produced by a set of birefringent spheres spinning due to the transfer of
light angular momentum. Unlike the previous techniques, this method is able to
distinguish between a singular point in a complex flow and the absence of flow
at all; furthermore it permits us to characterize the stability of the singular
point.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:35:32 GMT"
}
] | 2008-04-11T00:00:00 | [
[
"Volpe",
"Giorgio",
""
],
[
"Volpe",
"Giovanni",
""
],
[
"Petrov",
"Dmitri",
""
]
] |
0707.3547 | Alberto Bernacchia | Alberto Bernacchia, Philippe Naveau, Mathieu Vrac, Pascal Yiou | Detecting spatial patterns with the cumulant function. Part II: An
application to El Nino | 15 pages, 7 figures | null | 10.5194/npg-15-169-2008 | null | physics.data-an physics.geo-ph | null | The spatial coherence of a measured variable (e.g. temperature or pressure)
is often studied to determine the regions where this variable varies the most
or to find teleconnections, i.e. correlations between specific regions. While
usual methods to find spatial patterns, such as Principal Components Analysis
(PCA), are constrained by linear symmetries, the dependence of variables such
as temperature or pressure at different locations is generally nonlinear. In
particular, large deviations from the sample mean are expected to be strongly
affected by such nonlinearities. Here we apply a newly developed nonlinear
technique (Maxima of Cumulant Function, MCF) for the detection of typical
spatial patterns that largely deviate from the mean. In order to test the
technique and to introduce the methodology, we focus on the El Nino/Southern
Oscillation and its spatial patterns. We find nonsymmetric temperature patterns
corresponding to El Nino and La Nina, and we compare the results of MCF with
other techniques, such as the symmetric solutions of PCA, and the nonsymmetric
solutions of Nonlinear PCA (NLPCA). We found that MCF solutions are more
reliable than the NLPCA fits, and can capture mixtures of principal components.
Finally, we apply Extreme Value Theory on the temporal variations extracted
from our methodology. We find that the tails of the distribution of extreme
temperatures during La Nina episodes is bounded, while the tail during El Ninos
is less likely to be bounded. This implies that the mean spatial patterns of
the two phases are asymmetric, as well as the behaviour of their extremes.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:53:13 GMT"
}
] | 2020-01-29T00:00:00 | [
[
"Bernacchia",
"Alberto",
""
],
[
"Naveau",
"Philippe",
""
],
[
"Vrac",
"Mathieu",
""
],
[
"Yiou",
"Pascal",
""
]
] |
0707.3548 | Julien Langou | Alfredo Buttari (Department of Electrical Engineering and Computer
Science, University Tennessee, Knoxville, Tennessee), Julien Langou
(Department of Mathematical Sciences, University of Colorado at Denver and
Health Sciences Center, Colorado), Jakub Kurzak (Department of Electrical
Engineering and Computer Science, University Tennessee, Knoxville,
Tennessee), and Jack Dongarra (Department of Electrical Engineering and
Computer Science, University Tennessee, Knoxville, Tennessee and Computer
Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge,
Tennessee) | Parallel Tiled QR Factorization for Multicore Architectures | 19 pages 14 figures | Concurrency and Computation: Practice and Experience, volume 20,
Issue 13, pages 1573-1590, Sep 2008 | 10.1002/cpe.1301 | UT-CS-07-598 | math.NA | null | As multicore systems continue to gain ground in the High Performance
Computing world, linear algebra algorithms have to be reformulated or new
algorithms have to be developed in order to take advantage of the architectural
features on these new processors. Fine grain parallelism becomes a major
requirement and introduces the necessity of loose synchronization in the
parallel execution of an operation. This paper presents an algorithm for the QR
factorization where the operations can be represented as a sequence of small
tasks that operate on square blocks of data. These tasks can be dynamically
scheduled for execution based on the dependencies among them and on the
availability of computational resources. This may result in an out of order
execution of the tasks which will completely hide the presence of intrinsically
sequential tasks in the factorization. Performance comparisons are presented
with the LAPACK algorithm for QR factorization where parallelism can only be
exploited at the level of the BLAS operations.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:40:19 GMT"
}
] | 2008-08-12T00:00:00 | [
[
"Buttari",
"Alfredo",
"",
"Department of Electrical Engineering and Computer\n Science, University Tennessee, Knoxville, Tennessee"
],
[
"Langou",
"Julien",
"",
"Department of Mathematical Sciences, University of Colorado at Denver and\n Health Sciences Center, Colorado"
],
[
"Kurzak",
"Jakub",
"",
"Department of Electrical\n Engineering and Computer Science, University Tennessee, Knoxville,\n Tennessee"
],
[
"Dongarra",
"Jack",
"",
"Department of Electrical Engineering and\n Computer Science, University Tennessee, Knoxville, Tennessee and Computer\n Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge,\n Tennessee"
]
] |
0707.3549 | Sudipto Paul Chowdhury | Sudipto Paul Chowdhury | Superstring partition functions in the doubled formalism | 15 pages | JHEP 0709:127,2007 | 10.1088/1126-6708/2007/09/127 | null | hep-th | null | Computation of superstring partition function for the non-linear sigma model
on the product of a two-torus and its dual within the scope of the doubled
formalism is presented. We verify that it reproduces the partition functions of
the toroidally compactified type--IIA and type--IIB theories for appropriate
choices of the GSO projection.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:21:22 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Chowdhury",
"Sudipto Paul",
""
]
] |
0707.3550 | Damien Chablat | Damien Chablat (IRCCyN), Philippe Wenger (IRCCyN) | A Six Degree-Of-Freedom Haptic Device Based On The Orthoglide And A
Hybrid Agile Eye | null | Dans Proceedings of IDETC 2006: 30th Mechanisms & Robotics
Conference (MR) - IDETC, Philadelphie : \'Etats-Unis d'Am\'erique (2006) | null | null | cs.RO | null | This paper is devoted to the kinematic design of a new six degree-of-freedom
haptic device using two parallel mechanisms. The first one, called orthoglide,
provides the translation motions and the second one, called agile eye, produces
the rotational motions. These two motions are decoupled to simplify the direct
and inverse kinematics, as it is needed for real-time control. To reduce the
inertial load, the motors are fixed on the base and a transmission with two
universal joints is used to transmit the rotational motions from the base to
the end-effector. Two alternative wrists are proposed (i), the agile eye with
three degrees of freedom or (ii) a hybrid wrist made by the assembly of a
two-dof agile eye with a rotary motor. The last one is optimized to increase
its stiffness and to decrease the number of moving parts.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:42:08 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
]
] |
0707.3551 | Christophe Mourougane | Christophe Mourougane (IRMAR), Shigeharu Takayama | Hodge metrics and the curvature of higher direct images | Arguments are simplified. To appear in Ann. Sci. Ecole Norm. Sup | Annales scientifiques de l'\'Ecole Normale Sup\'erieure, S\'erie 4
: Volume 41 (2008) no. 6 , p. 905-924 | 10.24033/asens.2084 | null | math.AG math.CV | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the harmonic theory developed by Takegoshi for representation of
relative cohomology and the framework of computation of curvature of direct
images bundles by Berndtsson, we prove that the higher direct images by a
smooth morphism of the relative canonical bundle twisted by a semi-positive
vector bundle are locally free and semi-positively curved, when endowed with a
suitable Hodge type metric.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:44:06 GMT"
},
{
"version": "v2",
"created": "Thu, 18 Sep 2008 15:21:30 GMT"
}
] | 2018-05-24T00:00:00 | [
[
"Mourougane",
"Christophe",
"",
"IRMAR"
],
[
"Takayama",
"Shigeharu",
""
]
] |
0707.3552 | Damien Chablat | Maher Baili (IRCCyN), Damien Chablat (IRCCyN), Philippe Wenger
(IRCCyN) | Analyse Comparative des Manipulateurs 3R \`a Axes Orthogonaux | null | Dans Congr\`es international Conception et Mod\'elisation des
Syst\`emes M\'ecaniques - Congr\`es international Conception et
Mod\'elisation des Syst\`emes M\'ecaniques, Hammamet : Tunisie (03/2005) | null | null | cs.RO | null | A family of 3R orthogonal manipulators without offset on the third body can
be divided into exactly nine workspace topologies. The workspace is
characterized in a half-cross section by the singular curves. The workspace
topology is defined by the number of cusps and nodes that appear on these
singular curves. Based on this classification, we evaluate theses manipulators
by the condition number related to the joint space and the proportion of the
region with four inverse kinematic solutions compared to a sphere containing
all the workspace. This second performance number is in relation with the
workspace. We determine finally le topology of workspace to which belong
manipulators having the best performance number values.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:46:22 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Baili",
"Maher",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
]
] |
0707.3553 | Damien Chablat | Mazen Zein (IRCCyN), Philippe Wenger (IRCCyN), Damien Chablat (IRCCyN) | An Exhaustive Study of the Workspace Topologies of all 3R Orthogonal
Manipulators with Geometric Simplifications | null | Dans Proceedings of CK2005 - Proceedings of CK2005, International
Workshop on Computational Kinematics, Cassino : Italie (05/2005) | null | null | cs.RO | null | This paper analyses the workspace of the three-revolute orthogonal
manipulators that have at least one of their DH parameters equal to zero. These
manipulators are classified into different groups with similar kinematic
properties. The classification criteria are based on the topology of the
workspace. Each group is evaluated according to interesting kinematic
properties such as the size of the workspace subregion reachable with four
inverse kinematic solutions, the existence and the size of voids, and the size
of the regions of feasible paths in the workspace.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:49:51 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Zein",
"Mazen",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
]
] |
0707.3554 | Paulo Eduardo de Brito PEB | H. N. Nazareno, P. E. de Brito, E. S. Rodrigues | Dynamics of wave packets in two-dimensional crystals under external
magnetic and electric fields: Vortices formation | null | null | 10.1103/PhysRevB.76.125405 | null | cond-mat.mes-hall | null | In the present work we deal with the dynamics of wave packets in a
two-dimensional crystal under the action of magnetic and electric fields. The
magnetic field is perpendicular to the plane and the electric field is on the
plane. In the simulations we considered a symmetric gauge for the vector
potential while the initial wave packet was assumed to have a gaussian
structure with given velocities. The parameters that control the kind of time
evolution of the packets are: the width of the gaussian, its velocity, and, the
intensity and direction of the electric field as well as the magnitude of the
magnetic field. In order to characterize the kind of propagation we evaluated
the mean-square displacement (MSD), the participation function and which is
more important we were able to follow the wave at different times, which
allowed us to see the time evolution of the centroid of the wave packets. A
novel effect was observed, namely, the dynamics is such that the wave function
\emph{splits} into two or more components and \emph{reconstructs} successively
as time goes, vortices are forming. To our understanding this is the first time
such an effect is reported. As for the inclusion of the electric field, we
observe a complex behavior of the wave packet as well as note that the vortices
propagate in direction perpendicular to the applied electric field. A similar
behavior presented by the classical treatment, In our case we give a quantum
mechanics explanation for that
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:51:04 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Nazareno",
"H. N.",
""
],
[
"de Brito",
"P. E.",
""
],
[
"Rodrigues",
"E. S.",
""
]
] |
0707.3555 | Alan Russell | A. Russell, Vladimir I. Fal'ko | Power Dependence of the Photocurrent Lineshape in a Semiconductor
Quantum Dot | 4 pages, 3 figures | null | 10.1063/1.2803850 | null | cond-mat.mes-hall | null | We propose a kinetic theory to describe the power dependence, $I_{PC}(P)$, of
the photocurrent (PC) lineshape in optically pumped quantum dots at low
temperatures, in both zero and finite magnetic fields. We show that there is a
crossover power $P_c$, determined by the electron and hole tunneling rates, at
which the photocurrent spectra become strongly influenced by the dot kinetics,
and no longer reflect the exciton lifetime in the dot. For $P>P_c$, we show
that the photocurrent saturates due to the slow hole escape rate (in e.g.,
InGaAs/GaAs dots), whereas the line-width increases with power: $\Gamma \propto
\sqrt{P}$. We also analyze to what measure the spin-doublet lineshape of the
photocurrent studied in a high magnetic field reflects the degree of circular
polarization of the incident light.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 13:53:42 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Russell",
"A.",
""
],
[
"Fal'ko",
"Vladimir I.",
""
]
] |
0707.3556 | Robert Young | A. J. Hudson, R. M. Stevenson, A. J. Bennett, R. J. Young, C. A.
Nicoll, P. Atkinson, K. Cooper, D. A. Ritchie and A. J. Shields | Coherence of an Entangled Exciton-Photon State | null | null | 10.1103/PhysRevLett.99.266802 | null | quant-ph | null | We study the effect of the exciton fine-structure splitting on the
polarisation-entanglement of photon pairs produced by the biexciton cascade in
a single quantum dot. The entanglement is found to persist despite separations
between the intermediate energy levels of up to 4 micro-eV. Measurements
demonstrate that entanglement of the photon pair is robust to the dephasing of
the intermediate exciton state responsible for the first order coherence time
of either single photon. We present a theoretical framework taking into account
the effects of spin-scattering, background light and dephasing. We distinguish
between the first-order coherence time, and a parameter which we measure for
the first time and define as the cross-coherence time.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:09:45 GMT"
},
{
"version": "v2",
"created": "Thu, 4 Oct 2007 14:14:30 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Hudson",
"A. J.",
""
],
[
"Stevenson",
"R. M.",
""
],
[
"Bennett",
"A. J.",
""
],
[
"Young",
"R. J.",
""
],
[
"Nicoll",
"C. A.",
""
],
[
"Atkinson",
"P.",
""
],
[
"Cooper",
"K.",
""
],
[
"Ritchie",
"D. A.",
""
],
[
"Shields",
"A. J.",
""
]
] |
0707.3557 | Markus Aichhorn | M. Aichhorn, E. Arrigoni, M. Potthoff and W. Hanke | Phase separation and competition of superconductivity and magnetism in
the two-dimensional Hubbard model: From strong to weak coupling | 7 pages, 8 figures, revised version to be published in Phys. Rev. B | Phys. Rev. B 76, 224509 (2007) | 10.1103/PhysRevB.76.224509 | null | cond-mat.str-el cond-mat.supr-con | null | Cooperation and competition between the antiferromagnetic, d-wave
superconducting and Mott-insulating states are explored for the two-dimensional
Hubbard model including nearest and next-nearest-neighbor hoppings at zero
temperature. Using the variational cluster approach with clusters of different
shapes and sizes up to 10 sites, it is found that the doping-driven transition
from a phase with microscopic coexistence of antiferromagnetism and
superconductivity to a purely superconducting phase is discontinuous for strong
interaction and accompanied by phase separation. At half-filling the system is
in an antiferromagnetic Mott-insulating state with vanishing charge
compressibility. Upon decreasing the interaction strength U below a certain
critical value of roughly U=4 (in units of the nearest-neighbor hopping),
however, the filling-dependent magnetic transition changes its character and
becomes continuous. Phase separation or, more carefully, the tendency towards
the formation of inhomogeneous states disappears. This critical value is in
contrast to previous studies, where a much larger value was obtained. Moreover,
we find that the system at half-filling undergoes the Mott transition from an
insulator to a state with a finite charge compressibility at essentially the
same value. The weakly correlated state at half-filling exhibits
superconductivity microscopically admixed to the antiferromagnetic order. This
scenario suggests a close relation between phase separation and the
Mott-insulator physics.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:59:14 GMT"
},
{
"version": "v2",
"created": "Tue, 6 Nov 2007 13:22:42 GMT"
}
] | 2007-12-11T00:00:00 | [
[
"Aichhorn",
"M.",
""
],
[
"Arrigoni",
"E.",
""
],
[
"Potthoff",
"M.",
""
],
[
"Hanke",
"W.",
""
]
] |
0707.3558 | Hamid Reza Sepangi | M. Heydari-Fard, H. Razmi and H. R. Sepangi | Brane-World Black Hole Solutions via a Confining Potential | 12 pages, to appear in PRD | Phys.Rev.D76:066002,2007 | 10.1103/PhysRevD.76.066002 | null | gr-qc hep-th | null | Using a confining potential, we consider spherically symmetric vacuum (static
black hole) solutions in a brane-world scenario. Working with a constant
curvature bulk, two interesting cases/solutions are studied. A Schwarzschild-de
Sitter black hole solution similar to the standard solution in the presence of
a cosmological constant is obtained which confirms the idea that an extra term
in the field equations on the brane can play the role of a positive
cosmological constant and may be used to account for the accelerated expansion
of the universe. The other solution is one in which we can have a proper
potential to explain the galaxy rotation curves without assuming the existence
of dark matter and without working with new modified theories (modified
Newtonian dynamics).
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:41:10 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 09:58:20 GMT"
},
{
"version": "v3",
"created": "Tue, 11 Sep 2007 12:44:36 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Heydari-Fard",
"M.",
""
],
[
"Razmi",
"H.",
""
],
[
"Sepangi",
"H. R.",
""
]
] |
0707.3559 | Wilson Wong | Wilson Wong | Practical Approach to Knowledge-based Question Answering with Natural
Language Understanding and Advanced Reasoning | Master of Science thesis, National Technical University College of
Malaysia, 2005 | null | null | null | cs.CL cs.AI cs.HC cs.IR | null | This research hypothesized that a practical approach in the form of a
solution framework known as Natural Language Understanding and Reasoning for
Intelligence (NaLURI), which combines full-discourse natural language
understanding, powerful representation formalism capable of exploiting
ontological information and reasoning approach with advanced features, will
solve the following problems without compromising practicality factors: 1)
restriction on the nature of question and response, and 2) limitation to scale
across domains and to real-life natural language text.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:30:27 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Wong",
"Wilson",
""
]
] |
0707.3560 | Damien Chablat | Antoine Rennuit (IRCCyN), Alain Micaelli (CEA/LIST), Xavier Merlhiot
(CEA/LIST), Claude Andriot (CEA/LIST), Fran\c{c}ois Guillaume, Nicolas
Chevassus, Damien Chablat (IRCCyN), Patrick Chedmail (IRCCyN) | Integration of a Balanced Virtual Manikin in a Virtual Reality Platform
aimed at Virtual Prototyping | null | Dans Proceedings of Virtual Concept 2005 - Virtual Concept,
Biarritz : France (11/2005) | null | null | cs.RO | null | The work presented here is aimed at introducing a virtual human controller in
a virtual prototyping framework. After a brief introduction describing the
problem solved in the paper, we describe the interest as for digital humans in
the context of concurrent engineering. This leads us to draw a control
architecture enabling to drive virtual humans in a real-time immersed way, and
to interact with the product, through motion capture. Unfortunately, we show
this control scheme can lead to unfeasible movements because of the lack of
balance control. Introducing such a controller is a problem that was never
addressed in the context of real-time. We propose an implementation of a
balance controller, that we insert into the previously described control
scheme. Next section is dedicated to show the results we obtained. Finally, we
propose a virtual reality platform into which the digital character controller
is integrated.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:23:37 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Rennuit",
"Antoine",
"",
"IRCCyN"
],
[
"Micaelli",
"Alain",
"",
"CEA/LIST"
],
[
"Merlhiot",
"Xavier",
"",
"CEA/LIST"
],
[
"Andriot",
"Claude",
"",
"CEA/LIST"
],
[
"Guillaume",
"François",
"",
"IRCCyN"
],
[
"Chevassus",
"Nicolas",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Chedmail",
"Patrick",
"",
"IRCCyN"
]
] |
0707.3561 | Krzysztof M. Graczyk | K. M. Graczyk, J. T. Sobczyk | Form Factors in the Quark Resonance Model | 15 pages, 4 figures, 3 tables | Phys.Rev.D77:053001,2008; Erratum-ibid.D79:079903,2009 | 10.1103/PhysRevD.77.053001 10.1103/PhysRevD.79.079903 | null | hep-ph | null | Vector and axial form factors in the quark resonance model are analyzed with
a combination of theoretical and phenomenological arguments. The new form of
form factors is deduced from $\Delta$(1232) excitation models and available
data. The vector part is shown to agree with the resonant contribution to
electron-proton inclusive $F_2$ data. The axial part is obtained by finding a
simultaneous fit to ANL and BNL $\frac{d \sigma}{d Q^2}$ neutrino scattering
data. The best fit corresponds to $C_5^A(0)=0.88$ in the Rarita Schwinger
formalism.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:05:58 GMT"
},
{
"version": "v2",
"created": "Tue, 8 Jan 2008 14:37:28 GMT"
}
] | 2014-11-18T00:00:00 | [
[
"Graczyk",
"K. M.",
""
],
[
"Sobczyk",
"J. T.",
""
]
] |
0707.3562 | Damien Chablat | Antoine Rennuit (IRCCyN), Alain Micaelli (CEA/LIST), Xavier Merlhiot
(CEA/LIST), Claude Andriot (CEA/LIST), Fran\c{c}ois Guillaume, Nicolas
Chevassus, Damien Chablat (IRCCyN), Patrick Chedmail (IRCCyN) | Balanced Virtual Humans Interacting with their Environment | null | Dans Summer Computer Simulation Conference - Summer Computer
Simulation Conference, France (08/2005) | null | null | cs.RO | null | The animation of human avatars seems very successful; the computer graphics
industry shows outstanding results in films everyday, the game industry
achieves exploits... Nevertheless, the animation and control processes of such
manikins are very painful. It takes days to a specialist to build such animated
sequences, and it is not adaptive to any type of modifications. Our main
purpose is the virtual human for engineering, especially virtual prototyping.
As for this domain of activity, such amounts of time are prohibitive.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:26:28 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Rennuit",
"Antoine",
"",
"IRCCyN"
],
[
"Micaelli",
"Alain",
"",
"CEA/LIST"
],
[
"Merlhiot",
"Xavier",
"",
"CEA/LIST"
],
[
"Andriot",
"Claude",
"",
"CEA/LIST"
],
[
"Guillaume",
"François",
"",
"IRCCyN"
],
[
"Chevassus",
"Nicolas",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Chedmail",
"Patrick",
"",
"IRCCyN"
]
] |
0707.3563 | Damien Chablat | Fouad Bennis (IRCCyN), Damien Chablat (IRCCyN), Philippe D\'epinc\'e | Virtual reality: A human centered tool for improving Manufacturing | null | Dans Proceedings of Virtual Concept 2005 - Virtual Concept,
Biarritz : France (11/2005) | null | null | cs.RO | null | Manufacturing is using Virtual Reality tools to enhance the product life
cycle. Their definitions are still in flux and it is necessary to define their
connections. Thus, firstly, we will introduce more closely some definitions
where we will find that, if the Virtual manufacturing concepts originate from
machining operations and evolve in this manufacturing area, there exist a lot
of applications in different fields such as casting, forging, sheet
metalworking and robotics (mechanisms). From the recent projects in Europe or
in USA, we notice that the human perception or the simulation of mannequin is
more and more needed in both fields. In this context, we have isolated some
applications as ergonomic studies, assembly and maintenance simulation, design
or training where the virtual reality tools can be applied. Thus, we find out a
family of applications where the virtual reality tools give the engineers the
main role in the optimization process. We will illustrate our paper by several
examples where virtual reality interfaces are used and combined with
optimization tools as multi-agent systems.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:28:01 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Bennis",
"Fouad",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Dépincé",
"Philippe",
""
]
] |
0707.3564 | Damien Chablat | Damien Chablat (IRCCyN), Philippe Wenger (IRCCyN) | A New Six Degree-of-Freedom Haptic Device based on the Orthoglide and
the Agile Eye | null | Dans Proceedings of Virtual Concept 2005 - Virtual Concept, France
(11/2005) | null | null | cs.RO | null | The aim of this paper is to present a new six degree-of-freedom (dof) haptic
device using two parallel mechanisms. The first one, called orthoglide,
provides the translation motions and the second one produces the rotational
motions. These two motions are decoupled to simplify the direct and inverse
kinematics, as it is needed for real-times control. To reduce the inertial
load, the motors are fixed on the base and a transmission with two universal
joints is used to transmit the rotational motions from the base to the
end-effector. The main feature of the orthoglide and of the agile eye mechanism
is the existence of an isotropic configuration. The length of the legs and the
range limits of the orthoglide are optimized to have homogeneous performance
throughout the Cartesian workspace, which has a nearly cubic workspace. These
properties permit to have a high stiffness throughout the workspace and
workspace limits that are easily understandable by the user.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:29:41 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Wenger",
"Philippe",
"",
"IRCCyN"
]
] |
0707.3565 | Jeroen Vandenbrink | Gianluca Giovannetti, Serena Margadonna, Jeroen van den Brink | KCrF_3: Electronic Structure, Magnetic and Orbital Ordering from First
Principles | 7 pages, 11 figures | Phys. Rev. B. 77, 075113 (2008). | 10.1103/PhysRevB.77.075113 | null | cond-mat.str-el cond-mat.mtrl-sci | null | The electronic, magnetic and orbital structures of KCrF_3 are determined in
all its recently identified crystallographic phases (cubic, tetragonal, and
monoclinic) with a set of {\it ab initio} LSDA and LSDA+U calculations. The
high-temperature undistorted cubic phase is metallic within the LSDA, but at
the LSDA+U level it is a Mott insulator with a gap of 1.72 eV. The tetragonal
and monoclinic phases of KCrF_3 exhibit cooperative Jahn-Teller distortions
concomitant with staggered 3x^2-r^2/3y^2-r^2 orbital order. We find that the
energy gain due to the Jahn-Teller distortion is 82/104 meV per chromium ion in
the tetragonal/monoclinic phase, respectively. These phases show A-type
magnetic ordering and have a bandgap of 2.48 eV. In this Mott insulating state
KCrF_3 has a substantial conduction bandwidth of 2.1 eV, leading to the
possibility for the kinetic energy of charge carriers in electron- or
hole-doped derivatives of KCrF_3 to overcome the polaron localization at low
temperatures, in analogy with the situation encountered in the colossal
magnetoresistive manganites.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:30:27 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Giovannetti",
"Gianluca",
""
],
[
"Margadonna",
"Serena",
""
],
[
"Brink",
"Jeroen van den",
""
]
] |
0707.3566 | Dana P. Williams | Paul S. Muhly and Dana P. Williams | Renault's Equivalence Theorem for Groupoid Crossed Products | 69 pages. Minor changes. Page numbering is different from published
version available at http://nyjm.albany.edu:8000/m/2008/3.htm | New York Journal of Mathematics Monographs, vol 3, SUNY, Albany
NY, 2008 | null | null | math.OA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an exposition and proof of Renault's equivalence theorem for
crossed products by locally Hausdorff, locally compact groupoids. Our approach
stresses the bundle approach, concrete imprimitivity bimodules and is a
preamble to a detailed treatment of the Brauer semigroup for a locally
Hausdorff, locally compact groupoid.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:35:40 GMT"
},
{
"version": "v2",
"created": "Thu, 5 Jun 2008 15:50:10 GMT"
}
] | 2008-06-05T00:00:00 | [
[
"Muhly",
"Paul S.",
""
],
[
"Williams",
"Dana P.",
""
]
] |
0707.3567 | Tord Riemann | J. Gluza, F. Haas, K. Kajda, T. Riemann | Automatizing the application of Mellin-Barnes representations for
Feynman integrals | 10 pages, contribution to proceedings of ACAT, Amsterdam, The
Netherlands, April 23-27, 2007, several (trivial) typos corrected | PoSACAT2007:081,2007 | null | DESY 07-104, SFB/CPP-07-39, HEPTOOLS 07-017 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Feynman diagrams may be evaluated by Mellin-Barnes representations of their
Feynman parameter integrals in d=4-2\eps dimensions. Recently, the Mathematica
toolkit AMBRE has been developed for the automatic derivation of such
representations with a loop-by-loop approach. We describe the package and
exemplify its use with the \eps-expansion of the massive one-loop QED vertex
function.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:39:12 GMT"
},
{
"version": "v2",
"created": "Thu, 3 Jul 2008 15:17:59 GMT"
}
] | 2009-04-16T00:00:00 | [
[
"Gluza",
"J.",
""
],
[
"Haas",
"F.",
""
],
[
"Kajda",
"K.",
""
],
[
"Riemann",
"T.",
""
]
] |
0707.3568 | Hans-Ake Gustafsson | Hans-Ake Gustafsson | ALICE Detector Status and Commissioning | Proceedings of HCP 2006 | null | null | null | physics.ins-det | null | The Large Hadron Collider (LHC) will start operation in the end of 2007
colliding proton and lead beams at \surd S = 14 TeV and \surd S_{NN} = 5.5 TeV,
respectively. The accelerator and the experiments are under construction and
detailed studies of the physics program are being prepared. I will in this
paper review the current status of the ALICE experiment and the heavy ion
physics aspects that are unique at LHC.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:42:13 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Gustafsson",
"Hans-Ake",
""
]
] |
0707.3569 | Stefano Bellucci | S. Bellucci and P. Onorato | Transport through a double barrier in Large Radius Carbon Nanotubes in
the presence of a transverse magnetic field | 8 pages, 3 figures, PACS numbers: 05.60.Gg, 71.10.Pm, 73.63.-b,
71.20.Tx, 72.80.Rj | Eur. Phys. J. B 52, 469-476 (2006) | 10.1140/epjb/e2006-00326-3 | null | cond-mat.mes-hall cond-mat.str-el | null | We discuss the Luttinger Liquid behaviour of Large Radius Carbon Nanotube
e.g. the Multi Wall ones (MWNT), under the action of a transverse magnetic
field $B$. Our results imply a reduction with $B$ in the value of the $bulk$
critical exponent, $\alpha_{bulk}$, for the tunneling density of states, which
is in agreement with that observed in transport experiments. Then, the problem
of the transport through a Quantum Dot formed by two intramolecular tunneling
barriers along the MWNT, weakly coupled to Tomonaga-Luttinger liquids is
studied, including the action of a strong transverse magnetic field $B$. {We
predict the presence of some peaks in the conductance G versus $B$, related to
the magnetic flux quantization in the ballistic regime (at a very low
temperature, $T$) and also at higher $T$, where the Luttinger behaviour
dominates}. The temperature dependence of the maximum $G_{max}$ of the
conductance peak according to the Sequential Tunneling follows a power law,
$G\propto T^{\gamma_e-1}$ with $\gamma_e$ linearly dependent on the critical
exponent, $\alpha_{end}$, strongly reduced by $B$.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:45:32 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Bellucci",
"S.",
""
],
[
"Onorato",
"P.",
""
]
] |
0707.3570 | Sugata Kaviraj | S. Kaviraj, L. A. Kirkby, J. Silk and M. Sarzi | The UV properties of E+A galaxies: constraints on feedback-driven
quenching of star formation | MNRAS in press (accepted September 2007) | null | 10.1111/j.1365-2966.2007.12475.x | null | astro-ph | null | We present the first large-scale study of E+A (post-starburst) galaxies that
incorporates photometry in the ultraviolet (UV) wavelengths. We find that the
starburst that creates the E+A galaxy typically takes place within the last Gyr
and creates a high fraction (20-60 percent) of the stellar mass in the remnant
over a short timescale (< 0.1 Gyrs). We find a tight correlation between the
luminosity of our E+A galaxies and the implied star formation rate (SFR) during
the starburst. While low-luminosity E+As (M(z) > -20) exhibit implied SFRs of
less than 50 solar masses per year, their luminous counterparts (M(z) < -22)
shows SFRs greater than 300 and as high as 2000 solar masses per year,
suggesting that luminous and ultra-luminous infrared galaxies in the
low-redshift Universe could be the progenitors of massive nearby E+A galaxies.
We perform a comprehensive study of the characteristics of the quenching that
truncates the starburst in E+A systems.We find that, for galaxies less massive
than 10^10 MSun, the quenching efficiency decreases as the galaxy mass
increases. However, for galaxies more massive than 10^10 MSun, this trend is
reversed and the quenching efficiency increases with galaxy mass. Noting that
the mass threshold at which this reversal occurs is in excellent agreement with
the mass above which AGN become significantly more abundant in nearby galaxies,
we use simple energetic arguments to show that the bimodal behaviour of the
quenching efficiency is consistent with AGN and supernovae (SN) being the
principal sources of negative feedback above and below M ~ 10^10 MSun
respectively. (abridged)
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:12:38 GMT"
},
{
"version": "v2",
"created": "Fri, 2 Nov 2007 11:04:21 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Kaviraj",
"S.",
""
],
[
"Kirkby",
"L. A.",
""
],
[
"Silk",
"J.",
""
],
[
"Sarzi",
"M.",
""
]
] |
0707.3571 | Sherri Honza | J. Kong, T. Hyde, L. Matthews, M. Cook, J. Schmoke, J. Carmona-Reyes | Investigation of Dust Wake Field Oscillations | null | null | null | CASPER-07-06 | physics.plasm-ph | null | Wakefield oscillations created by the ion wakefield existing below a dust
particle within the plasma sheath generated above a powered lower electrode in
a GEC rf reference cell carry information about the plasma sheath, the dust
particle charge and the speed of the streaming ions. An experimental method to
investigate such wakefield oscillations is discussed.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 14:55:30 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Kong",
"J.",
""
],
[
"Hyde",
"T.",
""
],
[
"Matthews",
"L.",
""
],
[
"Cook",
"M.",
""
],
[
"Schmoke",
"J.",
""
],
[
"Carmona-Reyes",
"J.",
""
]
] |
0707.3572 | Dominic Joyce | Dominic Joyce | Kuranishi homology and Kuranishi cohomology | (v5) 290 pages. New material added | null | null | null | math.SG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Kuranishi space is a topological space with a Kuranishi structure, defined
by Fukaya and Ono. Kuranishi structures occur naturally on moduli spaces of
J-holomorphic curves in symplectic geometry.
Let Y be an orbifold and R a commutative ring or Q-algebra. We define two
kinds of Kuranishi homology KH_*(Y;R). The chain complex KC_*(Y;R) defining
KH_*(Y;R) is spanned over R by [X,f,G], for X a compact oriented Kuranishi
space with corners, f : X --> Y smooth, and G "gauge-fixing data" which makes
Aut(X,f,G) finite. Our main result is that these are isomorphic to singular
homology. We define Poincare dual Kuranishi cohomology, isomorphic to
compactly-supported cohomology.
We define five kinds of Kuranishi (co)bordism spanned by isomorphism
classes[X,f] for X a compact oriented Kuranishi space without boundary and f :
X --> Y smooth. They are new topological invariants, and we show they are very
large. These theories are powerful new tools in symplectic geometry. Defining
virtual cycles and chains for moduli spaces of J-holomorphic curves is trivial
in Kuranishi (co)homology. There is no need to perturb moduli spaces, and no
problems with transversality. This gives major simplifications in Lagrangian
Floer cohomology.
We define new Gromov-Witten type invariants in Kuranishi bordism, over Z not
Q. We sketch how these may be used to prove the integrality conjecture for
Gopakumar-Vafa invariants.
This paper is surveyed in arXiv:0710.5634.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:08:56 GMT"
},
{
"version": "v2",
"created": "Mon, 17 Sep 2007 09:34:09 GMT"
},
{
"version": "v3",
"created": "Tue, 30 Oct 2007 13:32:27 GMT"
},
{
"version": "v4",
"created": "Tue, 9 Sep 2008 21:08:05 GMT"
},
{
"version": "v5",
"created": "Wed, 22 Oct 2008 11:41:14 GMT"
}
] | 2008-10-22T00:00:00 | [
[
"Joyce",
"Dominic",
""
]
] |
0707.3573 | Sherri Honza | J. Creel, J. Carmona-Reyes, J. Kong and Truell W. Hyde | Particulate Contamination Within Fusion Devices and Complex (Dusty)
Plasmas | null | null | null | CASPER-07-07 | physics.plasm-ph | null | Over the past decade, dust particulate contamination has increasingly become
an area of concern within the fusion research community. In a burning plasma
machine design like the International Thermonuclear Experimental Reactor
(ITER), dust contamination presents problems for diagnostic integration and may
contribute to tritium safety issues. Additionally due to ITER design, such dust
contamination problems are projected to become of even greater concern due to
dust/wall interactions and possible instabilities created within the plasma by
such particulates. Since the dynamics of such dust can in general be explained
employing a combination of the ion drag, Coulomb force, and ion pre-sheath
drifts, recent research in complex (dusty) plasma physics often offers unique
insights for this research area. This paper will discuss the possibility of how
experimental observations of the dust and plasma parameters within a GEC rf
Reference Cell might be employed to diagnose conditions within fusion reactors,
hopefully providing insight into possible mechanisms for dust detection and
removal.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:12:05 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Creel",
"J.",
""
],
[
"Carmona-Reyes",
"J.",
""
],
[
"Kong",
"J.",
""
],
[
"Hyde",
"Truell W.",
""
]
] |
0707.3574 | Damien Chablat | Philippe Wenger (IRCCyN), Damien Chablat (IRCCyN), F\'elix Majou
(IRCCyN) | L'orthoglide : une machine-outil rapide d'architecture parall\`ele
isotrope | null | Dans 2\`eme Assises Machines et Usinage \`a Grande Vitesse -
2\`eme Assises Machines et Usinage \`a Grande Vitesse, France (03/2002) | null | null | cs.RO | null | This article presents the Orthoglide project. The purpose of this project is
the realization of a prototype of machine tool to three degrees of translation.
The characteristic of this machine is a parallel kinematic architecture
optimized to obtain a compact workspace with homogeneous performance. For that,
the principal criterion of design which was used is the isotropy.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:14:38 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Wenger",
"Philippe",
"",
"IRCCyN"
],
[
"Chablat",
"Damien",
"",
"IRCCyN"
],
[
"Majou",
"Félix",
"",
"IRCCyN"
]
] |
0707.3575 | Philipp Mayr | Philipp Mayr, Anne-Kathrin Walter | An exploratory study of Google Scholar | 16 pages, 4 figures | null | 10.1108/14684520710841784 | null | cs.DL cs.IR | null | The paper discusses and analyzes the scientific search service Google Scholar
(GS). The focus is on an exploratory study which investigates the coverage of
scientific serials in GS. The study shows deficiencies in the coverage and
up-to-dateness of the GS index. Furthermore, the study points up which Web
servers are the most important data providers for this search service and which
information sources are highly represented. We can show that there is a
relatively large gap in Google Scholars coverage of German literature as well
as weaknesses in the accessibility of Open Access content.
Keywords: Search engines, Digital libraries, Worldwide Web, Serials,
Electronic journals
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:19:36 GMT"
}
] | 2019-01-15T00:00:00 | [
[
"Mayr",
"Philipp",
""
],
[
"Walter",
"Anne-Kathrin",
""
]
] |
0707.3576 | Chiranjib Sur | Chiranjib Sur and Rajat K Chaudhuri | Relativistic multi-reference Fock-space coupled-cluster calculation of
the forbidden $6s^2^1 S_0 \longrightarrow 6s5d^3 D_1$ magnetic-dipole
transition in ytterbium | Revtex, 4 EPS figures | Phys. Rev. A, 76, 012509 (2007) | 10.1103/PhysRevA.76.012509 | null | physics.atom-ph physics.chem-ph | null | We report the forbidden $6s^{2} ^{1}S_{0}\longrightarrow6s5d ^{3}D_{1}$
magnetic-dipole transition amplitude computed using multi-reference Fock-space
coupled-cluster theory. Our computed transition matrix element
($1.34\times10^{-4}\mu_{B}$) is in excellent agreement with the experimental
value ($1.33\times10^{-4}$ $\mu_{B}$). This value in combination with other
known quantities will be helpful to determine the parity non-conserving
amplitude for the $6s^{2} ^{1}S_{0}\longrightarrow6s5d ^{3}D_{1}$ transition in
atomic Yb. To our knowledge our calculation is the most accurate to date and
can be very important in the search of physics beyond the standard model. We
further report the $6s6p ^{3}P_{0}\longrightarrow6s6p ^{1}P_{1}$ and $6s5d
^{3}D_{1}\longrightarrow6s6p ^{3}P_{0}$ transition matrix elements which are
also in good agreement with the earlier theoretical estimates.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:05:45 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Sur",
"Chiranjib",
""
],
[
"Chaudhuri",
"Rajat K",
""
]
] |
0707.3577 | Roman Gr\"oger | Roman Gr\"oger | Development of physically based plastic flow rules for body-centered
cubic metals with temperature and strain rate dependencies | Dissertation in Materials Science and Engineering, University of
Pennsylvania (2007), Advisor: Vaclav Vitek | null | null | null | cond-mat.mtrl-sci cond-mat.stat-mech | null | In this Thesis we first show how the shape of the Peierls barrier and its
dependence on the applied loading can be extracted from the data obtained in
atomistic studies at 0 K. We consider the Peierls barrier as a two-dimensional
periodic function of the position of the intersection of the dislocation line
with the perpendicular {111} plane, with adjustable terms dependent on the
shear stresses parallel and perpendicular to the slip direction. The functional
forms of these terms are based on the effective yield criterion recently
developed on the basis of atomistic modeling of the glide of screw dislocations
at 0 K. The minimum energy path between two potential minima, and thus the
corresponding activation barrier, is obtained using the Nudged Elastic Band
method. The constructed Peierls barrier reproduces correctly both the
well-known twinning-antitwinning asymmetry observed for pure shear parallel to
the slip direction and the effect of shear stresses perpendicular to the slip
direction. This advancement introduces for the first time the effect of both
shear stresses parallel and perpendicular to the slip direction into the model
of thermally activated dislocation motion. Based on this model we formulate a
general yield criterion that includes not only the full stress tensor but also
effects of temperature and strain rate. This approach forms a basis for
multislip yield criteria and flow relations for continuum analyses in both
single and polycrystals the results of which can be compared with experimental
observations.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:25:51 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Gröger",
"Roman",
""
]
] |
0707.3578 | Natalia Vale Asari | N. V. Asari (1), R. Cid Fernandes (1), G. Stasinska (2), J. P.
Torres-Papaqui (1,3), A. Mateus (4), L. Sodre Jr. (5), W. Schoenell (1), J.
M. Gomes (1) (for the SEAGal collaboration) ((1) UFSC, Brazil, (2) LUTH,
Observatoire de Paris, France, (3) INAOE, Mexico, (4) (IEEC-CSIC), Spain, (5)
USP, Brazil) | The history of star-forming galaxies in the Sloan Digital Sky Survey | Accepted for publication in MNRAS | Mon.Not.Roy.Astron.Soc.381:263-279,2007 | 10.1111/j.1365-2966.2007.12255.x | null | astro-ph | null | We study the evolution of 82302 star-forming (SF) galaxies from the SDSS. Our
main goals are to explore new ways of handling star formation histories (SFH)
obtained with our publicly available spectral synthesis code STARLIGHT, and
apply them to investigate how SFHs vary as a function of nebular metallicity
(Zneb). Our main results are: (1) A conventional correlation analysis shows how
global properties such as luminosity, mass, dust content, mean stellar
metallicity and mean stellar age relate to Zneb. (2) We present a simple
formalism which compresses the results of the synthesis into time-dependent
star formation rates (SFR) and mass assembly histories. (3) The current SFR
derived from the population synthesis and that from H-alpha are shown to agree
within a factor of two. Thus we now have a way to estimate SFR in AGN hosts,
where the H-alpha method cannot be applied. (4) Fully time-dependent SFHs are
derived for all galaxies and averaged over six Zneb bins spanning the entire SF
wing in the [OIII]/H-beta X [NII]/H-alpha diagram. (5) We find that SFHs vary
systematically along the SF sequence, such that low-Zneb systems evolve slower
and are currently forming stars at a higher relative rate. (6) At any given
time, the distribution of specific SFRs for galaxies within a Zneb-bin is broad
and roughly log-normal. (7) The same results are found grouping galaxies in
stellar mass (M*) or surface mass density (S*) bins. (8) The overall pattern of
SFHs as a function of Zneb, M* or S* is robust against changes in selection
criteria, choice of evolutionary synthesis models for the spectral fits, and
differential extinction effects. (Abridged)
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:39:07 GMT"
}
] | 2019-08-15T00:00:00 | [
[
"Asari",
"N. V.",
""
],
[
"Fernandes",
"R. Cid",
""
],
[
"Stasinska",
"G.",
""
],
[
"Torres-Papaqui",
"J. P.",
""
],
[
"Mateus",
"A.",
""
],
[
"Sodre",
"L.",
"Jr."
],
[
"Schoenell",
"W.",
""
],
[
"Gomes",
"J. M.",
""
]
] |
0707.3579 | Boucenna Ahmed | Ahmed Boucenna | Origin of the numerals, Zero concept | 6 pages, 1 table | null | null | null | math.HO | null | The partisans of the hypothesis of the Indian origin of the numerals create
confusion between the history of the Indian mathematics and the history of our
modern numerals. To argue the thesis of the Indian origin of the numbers they
confound between: the "intuitive zero " of Brahmagupta, that means ''nothing''
and which is the difference of two equal numbers, the "numeral zero" used in
the representation of the numbers and the "mathematical zero" defined by the
modern mathematicians. "Sifr" designate the "numeral zero" and "Shunya"
designate the "intuitive zero". The word "Sifr" is not a traduction of the word
"Shunya" and does not derive from the Indian word "Shunya", since the word
"Sifr" and its derivatives existed in Arabic long before the appearance of zero
itself The facts that the "intuitive zero" and the "mathematical zero" are
represented currently by the "numerals zero" symbol "0" are only consequences
of the representation of the numbers by the "Ghubari" numerals
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:40:29 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Boucenna",
"Ahmed",
""
]
] |
0707.3580 | Stefano Bellucci | S. Bellucci and P. Onorato | Spin Hall Effect and Spin Orbit coupling in Ballistic Nanojunctions | 6 pages, 3 figures | Phys. Rev. B 75, 235326 (2007) | 10.1103/PhysRevB.75.235326 | null | cond-mat.mes-hall | null | We propose a new scheme of spin filtering based on nanometric crossjunctions
in the presence of Spin Orbit interaction, employing ballistic nanojunctions
patterned in a two-dimensional electron gas. We demonstrate that the flow of a
longitudinal unpolarized current through a ballistic X junction patterned in a
two-dimensional electron gas with Spin Orbit coupling (SOC) induces a spin
accumulation which has opposite signs for the two lateral probes. This spin
accumulation, corresponding to a transverse pure spin current flowing in the
junction, is the main observable signature of the spin Hall effect in such
nanostructures.
We benchmark the effects of two different kinds of Spin Orbit interactions.
The first one ($\alpha$-SOC) is due to the interface electric field that
confines electrons to a two-dimensional layer, whereas the second one
($\beta$-SOC) corresponds to the interaction generated by a lateral confining
potential.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:42:21 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Bellucci",
"S.",
""
],
[
"Onorato",
"P.",
""
]
] |
0707.3581 | Yuan Feng | Yuan Feng, Yaoyun Shi | Characterizing locally distinguishable orthogonal product states | null | null | null | null | quant-ph | null | Bennett et al. \cite{BDF+99} identified a set of orthogonal {\em product}
states in the $3\otimes 3$ Hilbert space such that reliably distinguishing
those states requires non-local quantum operations. While more examples have
been found for this counter-intuitive ``nonlocality without entanglement''
phenomenon, a complete and computationally verifiable characterization for all
such sets of states remains unknown. In this Letter, we give such a
characterization for the $3\otimes 3$ space.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:48:01 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Feng",
"Yuan",
""
],
[
"Shi",
"Yaoyun",
""
]
] |
0707.3582 | Aparna Maybhate | A.Maybhate (STScI), J.Masiero (IfA), J.E. Hibbard (NRAO), J.C.
Charlton (Penn State), C. Palma (Penn State), K.A. Knierman (Steward), J.
English (U. Manitoba) | An HI Threshold for Star Cluster Formation in Tidal Debris | 19 pages, 6 figures, 3 tables, accepted for publication in MNRAS | null | 10.1111/j.1365-2966.2007.12265.x | STScI E-print #1773 | astro-ph | null | Super star clusters are young, compact star clusters found in the central
regions of interacting galaxies. Recently, they have also been reported to
preferentially form in certain tidal tails, but not in others. In this paper,
we have used 21 cm HI maps and the Hubble Space Telescope Wide Field Planetary
Camera 2 images of eight tidal tail regions of four merging galaxy pairs to
compare the kiloparsec scale HI distribution with the location of super star
clusters found from the optical images. For most of the tails, we find that
there is an increase in super star cluster density with increasing projected HI
column density, such that the star cluster density is highest when log N(HI) >=
20.6 cm^{-2}, but equal to the background count rate at lower HI column
density. However, for two tails (NGC 4038/39 Pos A and NGC 3921), there is no
significant star cluster population despite the presence of gas at high column
density. This implies that the N(HI) threshold is a necessary but not
sufficient condition for cluster formation. Gas volume density is likely to
provide a more direct criterion for cluster formation, and other factors such
as gas pressure or strength of encounter may also have an influence. Comparison
of HI thresholds needed for formation of different types of stellar structures
await higher resolution HI and optical observations of larger numbers of
interacting galaxies.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:48:43 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Maybhate",
"A.",
"",
"STScI"
],
[
"Masiero",
"J.",
"",
"IfA"
],
[
"Hibbard",
"J. E.",
"",
"NRAO"
],
[
"Charlton",
"J. C.",
"",
"Penn State"
],
[
"Palma",
"C.",
"",
"Penn State"
],
[
"Knierman",
"K. A.",
"",
"Steward"
],
[
"English",
"J.",
"",
"U. Manitoba"
]
] |
0707.3583 | Peter Landesman Dr. | Peter Landesman | Generalized Differential Galois Theory | 71 pages, part of author's Phd. thesis | null | null | null | nlin.SI | null | A Galois theory of differential fields with parameters is developed in a
manner that generalizes Kolchin's theory. It is shown that all connected
differential algebraic groups are Galois groups of some appropriate
differential field extension.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:56:04 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Landesman",
"Peter",
""
]
] |
0707.3584 | Nihar Jindal | Steven Weber, Jeffrey G. Andrews, Nihar Jindal | The effect of fading, channel inversion, and threshold scheduling on ad
hoc networks | Accepted for publication in IEEE Trans. Inform. Theory, 24 pages | IEEE Trans. Information Theory, Vol. 53, No. 11, pp. 4127-4149,
Nov. 2007 | null | null | cs.IT math.IT | null | This paper addresses three issues in the field of ad hoc network capacity:
the impact of i)channel fading, ii) channel inversion power control, and iii)
threshold-based scheduling on capacity. Channel inversion and threshold
scheduling may be viewed as simple ways to exploit channel state information
(CSI) without requiring cooperation across transmitters. We use the
transmission capacity (TC) as our metric, defined as the maximum spatial
intensity of successful simultaneous transmissions subject to a constraint on
the outage probability (OP). By assuming the nodes are located on the infinite
plane according to a Poisson process, we are able to employ tools from
stochastic geometry to obtain asymptotically tight bounds on the distribution
of the signal-to-interference (SIR) level, yielding in turn tight bounds on the
OP (relative to a given SIR threshold) and the TC. We demonstrate that in the
absence of CSI, fading can significantly reduce the TC and somewhat
surprisingly, channel inversion only makes matters worse. We develop a
threshold-based transmission rule where transmitters are active only if the
channel to their receiver is acceptably strong, obtain expressions for the
optimal threshold, and show that this simple, fully distributed scheme can
significantly reduce the effect of fading.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:01:48 GMT"
}
] | 2011-11-10T00:00:00 | [
[
"Weber",
"Steven",
""
],
[
"Andrews",
"Jeffrey G.",
""
],
[
"Jindal",
"Nihar",
""
]
] |
0707.3585 | Chiranjib Sur | Chiranjib Sur and Rajat K Chaudhuri | Effects of partial triple excitations in atomic coupled cluster
calculations | 5 EPS figures, Latex 2e | Chem. Phys. Lett., vol 442, 150 (2007) | 10.1016/j.cplett.2007.05.052 | null | physics.atom-ph physics.chem-ph | null | In this article we study the effects of higher body excitations in the
relativistic CC calculations for atoms and ions with one valence electron using
Fock-space CCSD, CCSD(T) and its unitary variants. The present study
demonstrates that CCSD(T) estimates the ionization potentials (IPs) and the
valence electron removal energies quite accurately for alkali atoms and singly
ionized alkaline earth ions, but yields unphysical energy levels for atoms
and/or ions with partially filled sub-shell like C II. We further demonstrate
that the higher body excitation effects can be incorporated more effectively
through the unitary coupled cluster theory (UCC) compared to the CCSD(T)
method.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 15:57:14 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sur",
"Chiranjib",
""
],
[
"Chaudhuri",
"Rajat K",
""
]
] |
0707.3586 | Chiranjib Sur | Chiranjib Sur and Rajat K Chaudhuri | Branching ratios of radiative transitions in O VI | Submitted to J. Phys. B, March 2007 | null | 10.1088/0953-4075/40/22/001 | null | physics.atom-ph physics.plasm-ph | null | We study the branching ratios of the allowed and forbidden radiative
transitions among the first few (9) fine structure levels of O VI using
relativistic coupled cluster theory. We find irregular patterns for a number of
transitions with in $n$-complexes with $n\le4$. We have used the exisiting
values of the allowed electric dipole ($E1$) transition as a benchmark of our
theory. Good agreement with the existing values establish accuracies of not
only the theoretical method but the basis function as well. In general the
electric quadrupole ($E2$) transition probabilities are greater in magnitude
than magnetic dipole ($M1$) transition probabilities, whereas for medium atomic
transition frequencies they are of the same order of magnitude. On the other
hand if the transitions involved are between two fine structure components of
the same term, then the $M1$ transition probability is more probable than that
of $E2$. We have analyzed these trends with physical arguments and order of
magnitude estimations. The results presented here in tabular and graphical
forms are compared with the available theoretical and observed data. Graphical
analysis helps to understand the trends of electric and magnetic transitions
for the decay channels presented here. Our calculated values of the lifetimes
of the excited states are in very good agreement with the available results.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:01:21 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Sur",
"Chiranjib",
""
],
[
"Chaudhuri",
"Rajat K",
""
]
] |
0707.3587 | Chiranjib Sur | Chiranjib Sur and Rajat K Chaudhuri | A relativistic unitary coupled-cluster study of electric quadrupole
moment and magnetic dipole hyperfine constants of ^{199}Hg^{+} | Revtex, 2 EPS figures, To be published in Phys. Rev. A | Phys. Rev. A 76, 032503 (2007) | 10.1103/PhysRevA.76.032503 | null | physics.atom-ph physics.chem-ph | null | Searching for an accurate optical clock which can serve as a better time
standard than the present day atomic clock is highly demanding from several
areas of science and technology. Several attempts have been made to built more
accurate clocks with different ion species. In this article we discuss the
electric quadrupole and hyperfine shifts in the $5d^{9}6s^{2}
^{2}D_{5/2}(F=0,m_{F}=0)\leftrightarrow5d^{10}6s ^{2}S_{1/2}(F=2,m_{F}=0)$
clock transition in $ ^{199}Hg^{+}$, one of the most promising candidates for
next generation optical clocks. We have applied Fock-space unitary
coupled-cluster (FSUCC) theory to study the electric quadrupole moment of the
$5d^{9}6s^{2} ^{2}D_{5/2}$ state and magnetic dipole hyperfine constants of
$5d^{9}6s^{2} ^{2}D_{3/2,5/2}$ and $5d^{10}6s^{1} ^{2}S_{1/2}$ states
respectively of $ ^{199}Hg^{+}$. We have also compared our results with
available data. To the best of our knowledge, this is the first time a variant
of coupled-cluster (CC) theories has been applied to study these kinds of
properties of $Hg^{+}$and is the most accurate estimate of these quantities to
date.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:08:54 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 14:57:26 GMT"
},
{
"version": "v3",
"created": "Mon, 17 Sep 2007 19:44:23 GMT"
}
] | 2007-09-17T00:00:00 | [
[
"Sur",
"Chiranjib",
""
],
[
"Chaudhuri",
"Rajat K",
""
]
] |
0707.3588 | Alexandre Aib\'eo | A. Aib\'eo, J. M. Ferreira, J. J. G. Lima | Magnetic braking in young late-type stars: the effect of polar spots | 11 pages, 10 figures, accepted in A&A | null | 10.1051/0004-6361:20065470 | null | astro-ph | null | The concentration of magnetic flux near the poles of rapidly rotating cool
stars has been recently proposed as an alternative mechanism to dynamo
saturation in order to explain the saturation of angular momentum loss. In this
work we study the effect of magnetic surface flux distribution on the coronal
field topology and angular momentum loss rate. We investigate if magnetic flux
concentration towards the pole is a reasonable alternative to dynamo
saturation. We construct a 1D wind model and also apply a 2-D self-similar
analytical model, to evaluate how the surface field distribution affects the
angular momentum loss of the rotating star. From the 1D model we find that, in
a magnetically dominated low corona, the concentrated polar surface field
rapidly expands to regions of low magnetic pressure resulting in a coronal
field with small latitudinal variation. We also find that the angular momentum
loss rate due to a uniform field or a concentrated field with equal total
magnetic flux is very similar. From the 2D wind model we show that there are
several relevant factors to take into account when studying the angular
momentum loss from a star. In particular, we show that the inclusion of force
balance across the field in a wind model is fundamental if realistic
conclusions are to be drawn from the effect of non-uniform surface field
distribution on magnetic braking. This model predicts that a magnetic field
concentrated at high latitudes leads to larger Alfven radii and larger braking
rates than a smoother field distribution. From the results obtained, we argue
that the magnetic surface field distribution towards the pole does not directly
limit the braking efficiency of the wind.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:08:55 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Aibéo",
"A.",
""
],
[
"Ferreira",
"J. M.",
""
],
[
"Lima",
"J. J. G.",
""
]
] |
0707.3589 | Josiah Schwab | Saul Rappaport (1), Josiah Schwab (1), Scott Burles (1) ((1)
Department of Physics and Kavli Institute for Astrophysics and Space
Research, MIT) | Constraints on the Self-Gravity of Radiation Pressure via Big Bang
Nucleosynthesis | 4 pages, 1 figure | null | null | null | astro-ph | null | Using standard big-bang nucleosynthesis and present, high-precision
measurements of light element abundances, we place constraints on the
self-gravity of radiation pressure in the early universe. The self-gravity of
pressure is strictly non-Newtonian, and thus the constraints we set are a
direct test of this aspect of general relativity.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:07:27 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Rappaport",
"Saul",
""
],
[
"Schwab",
"Josiah",
""
],
[
"Burles",
"Scott",
""
]
] |
0707.3590 | Costas Efthimiou | C. J. Efthimiou | Trigonometric Series via Laplace Transforms | Version close to the published one | Mathematics Magazine 79 (2006) 376 | null | null | math.CA | null | The author's method (math-ph/9804010) that uses the Laplace transform to find
exact values for a large class of convergent series is extended to
trigonometric series.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:11:25 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Efthimiou",
"C. J.",
""
]
] |
0707.3591 | Alexei Anisovich Dr | A. V. Sarantsev, et al | New results on the Roper resonance and the P_{11} partial wave | 14 pages, 6 figures | Phys.Lett.B659:94-100,2008 | 10.1016/j.physletb.2007.11.055 | null | hep-ph | null | Properties of the Roper resonance, the first scalar excitation of the
nucleon, are determined. Pole positions and residues of the $P_{11}$ partial
wave are studied in a combined analysis of pion- and photo-induced reactions.
We find the Roper pole at $\{(1371\pm7)-i(92\pm10)\}$ MeV and an elasticity of
$0.61\pm 0.03$. The largest decay coupling is found for the $N\sigma$
($\sigma=(\pi\pi)$-$S$-wave). The analysis is based on new data on $\gamma p\to
p\pi^0\pi^0$ for photons in the energy range from the two-pion threshold to 820
MeV from TAPS at Mainz and from 0.4 to 1.3 GeV from Crystal Barrel at Bonn and
includes further data from other experiments. The partial wave analysis
excludes the possibility that the Roper resonance is split into two states with
different partial decay widths.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:14:49 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 14:41:25 GMT"
},
{
"version": "v3",
"created": "Sun, 29 Jul 2007 06:38:54 GMT"
},
{
"version": "v4",
"created": "Fri, 30 Nov 2007 14:14:52 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Sarantsev",
"A. V.",
""
]
] |
0707.3592 | Nikonov Victor A. | U. Thoma, M. Fuchs, A.V. Anisovich, G. Anton, R. Bantes, O.
Bartholomy, R. Beck, Yu. Beloglazov, V. Crede, A. Ehmanns, J. Ernst, I.
Fabry, H. Flemming, A. Foesel, Chr. Funke, R. Gothe, A. Gridnev, E. Gutz, St.
Hoeffgen, I. Horn, J. Hoessl, J. Junkersfeld, H. Kalinowsky, F. Klein, E.
Klempt, H. Koch, M. Konrad, B. Kopf, B. Krusche, J. Langheinrich, H. Loehner,
I. Lopatin, J. Lotz, H. Matthaey, D. Menze, V.A. Nikonov, D. Novinski, M.
Ostrick, H. van Pee, A.V. Sarantsev, C. Schmidt, H. Schmieden, B. Schoch, G.
Suft, V. Sumachev, T. Szczepanek, D. Walther, Chr. Weinheimer | N* and Delta* decays into N pi0 pi0 | 13 pages, 4 figures, long author's list | null | 10.1016/j.physletb.2007.11.054 | null | hep-ph | null | Decays of baryon resonances in the second and the third resonance region into
N pi0 pi0 are studied by photoproduction of two neutral pions off protons.
Partial decay widths of N* and Delta* resonances decaying into Delta(1232) pi,
N(\pi\pi)_{S}, N(1440)P_{11} pi, and N(1520)D_{13} pi are determined in a
partial wave analysis of this data, and data from other reactions. Several
partial decay widths were not known before. Interesting decay patterns are
observed which are not even qualitatively reproduced by quark model
calculations. In the second resonance region, decays into Delta(1232) pi
dominate clearly. The N(\pi\pi)_{S}-wave provides a significant contribution to
the cross section, especially in the third resonance region. The P_{13}(1720)
properties found here are at clear variance to PDG values.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:18:26 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 12:52:59 GMT"
},
{
"version": "v3",
"created": "Mon, 30 Jul 2007 07:42:04 GMT"
},
{
"version": "v4",
"created": "Fri, 30 Nov 2007 16:44:30 GMT"
}
] | 2015-05-13T00:00:00 | [
[
"Thoma",
"U.",
""
],
[
"Fuchs",
"M.",
""
],
[
"Anisovich",
"A. V.",
""
],
[
"Anton",
"G.",
""
],
[
"Bantes",
"R.",
""
],
[
"Bartholomy",
"O.",
""
],
[
"Beck",
"R.",
""
],
[
"Beloglazov",
"Yu.",
""
],
[
"Crede",
"V.",
""
],
[
"Ehmanns",
"A.",
""
],
[
"Ernst",
"J.",
""
],
[
"Fabry",
"I.",
""
],
[
"Flemming",
"H.",
""
],
[
"Foesel",
"A.",
""
],
[
"Funke",
"Chr.",
""
],
[
"Gothe",
"R.",
""
],
[
"Gridnev",
"A.",
""
],
[
"Gutz",
"E.",
""
],
[
"Hoeffgen",
"St.",
""
],
[
"Horn",
"I.",
""
],
[
"Hoessl",
"J.",
""
],
[
"Junkersfeld",
"J.",
""
],
[
"Kalinowsky",
"H.",
""
],
[
"Klein",
"F.",
""
],
[
"Klempt",
"E.",
""
],
[
"Koch",
"H.",
""
],
[
"Konrad",
"M.",
""
],
[
"Kopf",
"B.",
""
],
[
"Krusche",
"B.",
""
],
[
"Langheinrich",
"J.",
""
],
[
"Loehner",
"H.",
""
],
[
"Lopatin",
"I.",
""
],
[
"Lotz",
"J.",
""
],
[
"Matthaey",
"H.",
""
],
[
"Menze",
"D.",
""
],
[
"Nikonov",
"V. A.",
""
],
[
"Novinski",
"D.",
""
],
[
"Ostrick",
"M.",
""
],
[
"van Pee",
"H.",
""
],
[
"Sarantsev",
"A. V.",
""
],
[
"Schmidt",
"C.",
""
],
[
"Schmieden",
"H.",
""
],
[
"Schoch",
"B.",
""
],
[
"Suft",
"G.",
""
],
[
"Sumachev",
"V.",
""
],
[
"Szczepanek",
"T.",
""
],
[
"Walther",
"D.",
""
],
[
"Weinheimer",
"Chr.",
""
]
] |
0707.3593 | Rudolf Grimm | M. J. Wright, S. Riedl, A. Altmeyer, C. Kohstall, E. R. Sanchez
Guajardo, J. Hecker Denschlag, R. Grimm | Finite-Temperature Collective Dynamics of a Fermi Gas in the BEC-BCS
Crossover | null | Phys.Rev.Lett.99:150403,2007 | 10.1103/PhysRevLett.99.150403 | null | cond-mat.other | null | We report on experimental studies on the collective behavior of a strongly
interacting Fermi gas with tunable interactions and variable temperature. A
scissors mode excitation in an elliptical trap is used to characterize the
dynamics of the quantum gas in terms of hydrodynamic or near-collisionless
behavior. We obtain a crossover phase diagram for collisional properties,
showing a large region where a non-superfluid strongly interacting gas shows
hydrodynamic behavior. In a narrow interaction regime on the BCS side of the
crossover, we find a novel temperature-dependent damping peak, suggesting a
relation to the superfluid phase transition.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:20:54 GMT"
}
] | 2009-03-24T00:00:00 | [
[
"Wright",
"M. J.",
""
],
[
"Riedl",
"S.",
""
],
[
"Altmeyer",
"A.",
""
],
[
"Kohstall",
"C.",
""
],
[
"Guajardo",
"E. R. Sanchez",
""
],
[
"Denschlag",
"J. Hecker",
""
],
[
"Grimm",
"R.",
""
]
] |
0707.3594 | Giuseppe Pagliara | Francesco Giacosa and Giuseppe Pagliara | On the spectral functions of scalar mesons | 13 pages, 7 figures | Phys.Rev.C76:065204,2007 | 10.1103/PhysRevC.76.065204 | null | hep-ph | null | In this work we study the spectral functions of scalar mesons in one- and
two-channel cases. When the propagators satisfy the K\"allen-Lehman
representation a normalized spectral function is obtained, allowing to take
into account finite-width effects in the evaluation of decay rates. In the
one-channel case, suitable to the light sigma and k mesons, the spectral
function can deviate consistently from a Breit-Wigner shape. In the two-channel
case with one subthreshold channel the evaluated spectral function is well
approximated by a Flatte' distribution; when applying the study to the a_0(980)
and f_0(980) mesons the tree-level forbidden KK decay is analysed.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:27:04 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 10:59:40 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Giacosa",
"Francesco",
""
],
[
"Pagliara",
"Giuseppe",
""
]
] |
0707.3595 | Thorsten Ohl | Ana Alboteanu, Thorsten Ohl, Reinhold R\"uckl (W\"urzburg University) | The Noncommutative Standard Model at O(theta^2) | 22 pages, LaTeX, 6 eps figures included, added several references and
one clarification, accepted for publication in Phys. Rev. D | Phys.Rev.D76:105018,2007 | 10.1103/PhysRevD.76.105018 | null | hep-ph | null | We derive the most general Seiberg-Witten maps for noncommutative gauge
theories in second order of the noncommutative parameter theta. Our results
reveal the existence of more ambiguities than previously known. In particular,
we demonstrate that some of these ambiguities enter observables like scattering
cross sections and enlarge the parameter space of the noncommutative standard
model beyond O(theta).
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:38:08 GMT"
},
{
"version": "v2",
"created": "Mon, 17 Sep 2007 15:45:55 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Alboteanu",
"Ana",
"",
"Würzburg University"
],
[
"Ohl",
"Thorsten",
"",
"Würzburg University"
],
[
"Rückl",
"Reinhold",
"",
"Würzburg University"
]
] |
0707.3596 | Nikonov Victor A. | A. V. Anisovich, V. Kleber, E. Klempt, V. A. Nikonov, A. V. Sarantsev,
U. Thoma | Baryon resonances and polarization transfer in hyperon photoproduction | 12 pages, 9 figures | Eur.Phys.J.A34:243-254,2007 | 10.1140/epja/i2007-10503-6 | null | hep-ph | null | A partial wave analysis is presented of data on photoproduction of hyperons
including single and double polarization observables. The large spin transfer
probability reported by the CLAS collaboration can be successfully described
with an isobar partial wave analysis.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:35:24 GMT"
},
{
"version": "v2",
"created": "Fri, 30 Nov 2007 13:37:30 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Anisovich",
"A. V.",
""
],
[
"Kleber",
"V.",
""
],
[
"Klempt",
"E.",
""
],
[
"Nikonov",
"V. A.",
""
],
[
"Sarantsev",
"A. V.",
""
],
[
"Thoma",
"U.",
""
]
] |
0707.3597 | Xiuping Su | Bernt Tore Jensen, Xiuping Su, Rupert W. T. Yu | Exceptional representations of a double quiver of type A, and Richardson
elements in seaweed Lie algebras | null | null | null | null | math.RT | null | In this paper, we study the set of $\Delta$-filtered modules of
quasi-hereditary algebras arising from quotients of the double of quivers of
type $A$. Our main result is that for any fixed $\Delta$-dimension vector,
there is a unique (up to isomorphism) exceptional $\Delta$-filtered module. We
then apply this result to show that there is always an open adjoint orbit in
the nilpotent radical of a seaweed Lie algebra in $\mathrm{gl}_{n}(\field)$,
thus answering positively in this $\mathrm{gl}_{n}(\field)$ case to a question
raised independently by Michel Duflo and Dmitri Panyushev. An example of a
seaweed Lie algebra in a simple Lie algebra of type $E_{8}$ not admitting an
open orbit in its nilpotent radical is given.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:30:13 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Jensen",
"Bernt Tore",
""
],
[
"Su",
"Xiuping",
""
],
[
"Yu",
"Rupert W. T.",
""
]
] |
0707.3598 | Davide L. Ferrario | Davide L. Ferrario and Alessandro Portaluri | On the dihedral n-body problem | Second version. In the first there was a mistake in a proof: some
section had been omitted | null | 10.1088/0951-7715/21/6/009 | null | math.DS | null | Consider n=2l>=4 point particles with equal masses in space, subject to the
following symmetry constraint: at each instant they form an orbit of the
dihedral group D_l, where D_l is the group of order 2l generated by two
rotations of angle pi around two secant lines in space meeting at an angle of
pi/l. By adding a homogeneous gravitational (Newtonian) potential one finds a
special $n$-body problem with three degrees of freedom, which is a kind of
generalisation of Devaney isosceles problem, in which all orbits have zero
angular momentum. In the paper we find all the central configurations and we
compute the dimension of the stable/unstable manifolds.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:34:45 GMT"
},
{
"version": "v2",
"created": "Tue, 11 Mar 2008 15:39:24 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ferrario",
"Davide L.",
""
],
[
"Portaluri",
"Alessandro",
""
]
] |
0707.3599 | Koos Gubbels | K. B. Gubbels and H. T. C. Stoof | Theory for p-Wave Feshbach Molecules | Replaced with published version | Phys.Rev.Lett.99:190406,2007 | 10.1103/PhysRevLett.99.190406 | null | cond-mat.supr-con | null | We determine the physical properties of \emph{p}-wave Feshbach molecules in
doubly spin-polarized $^{40}$K and find excellent agreement with recent
experiments. We show that these molecules have a large probability $Z$ to be in
the closed channel or bare molecular state responsible for the Feshbach
resonance. In the superfluid state this allows for observation of Rabi
oscillations between the molecular and atomic components of the Bose-Einstein
condensed pairs, which contains a characteristic signature of the quantum phase
transition that occurs as a function of applied magnetic field.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:45:19 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 15:23:04 GMT"
},
{
"version": "v3",
"created": "Sat, 10 Nov 2007 13:46:00 GMT"
}
] | 2014-11-18T00:00:00 | [
[
"Gubbels",
"K. B.",
""
],
[
"Stoof",
"H. T. C.",
""
]
] |
0707.3600 | Alexei Anisovich Dr | V. A. Nikonov, A. V. Anisovich, E. Klempt, A. V. Sarantsev and U.
Thoma | Further evidence for N(1900)P_{13} from photoproduction of hyperons | 13 pages, 3 figures | Phys.Lett.B662:245-251,2008 | 10.1016/j.physletb.2008.03.004 | null | hep-ph | null | We report further evidence for $N(1900)P_{13}$ from an analysis of a large
variety of photo- and pion-induced reactions, in particular from the new CLAS
measurements of double polarization observables for photoproduction of
hyperons. The data are consistent with two classes of solutions both requiring
contributions from $N(1900)P_{13}$ but giving different $N(1900)P_{13}$ pole
positions. $(M-i\Gamma/2) = (1915\pm50)-i(90\pm25)$ MeV covers both solutions.
The small elasticity of 10% or less explains why it was difficult to observe
the state in $\pi N$ elastic scattering.
$N(1900)P_{13}$ is a 2-star resonance which is predicted by symmetric
three-quark models. In diquark-quark models, the existence of the state is not
expected.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:35:21 GMT"
},
{
"version": "v2",
"created": "Fri, 30 Nov 2007 14:04:50 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Nikonov",
"V. A.",
""
],
[
"Anisovich",
"A. V.",
""
],
[
"Klempt",
"E.",
""
],
[
"Sarantsev",
"A. V.",
""
],
[
"Thoma",
"U.",
""
]
] |
0707.3601 | Vijay Balasubramanian | Vijay Balasubramanian, Jan de Boer, Vishnu Jejjala, Joan Simon | Entropy of near-extremal black holes in AdS_5 | LaTeX; v2: references and a few additional comments added | JHEP 0805:067,2008 | 10.1088/1126-6708/2008/05/067 | UPR-T-1185, ITFA-2007-33, DCPT-07/37, UCB-PTH-07/13 | hep-th | null | We construct the microstates of near-extremal black holes in AdS_5 x S^5 as
gases of defects distributed in heavy BPS operators in the dual SU(N)
Yang-Mills theory. These defects describe open strings on spherical D3-branes
in the S^5, and we show that they dominate the entropy by directly enumerating
them and comparing the results with a partition sum calculation. We display new
decoupling limits in which the field theory of the lightest open strings on the
D-branes becomes dual to a near-horizon region of the black hole geometry. In
the single-charge black hole we find evidence for an infrared duality between
SU(N) Yang-Mills theories that exchanges the rank of the gauge group with an
R-charge. In the two-charge case (where pairs of branes intersect on a line),
the decoupled geometry includes an AdS_3 factor with a two-dimensional CFT
dual. The degeneracy in this CFT accounts for the black hole entropy. In the
three-charge case (where triples of branes intersect at a point), the decoupled
geometry contains an AdS_2 factor. Below a certain critical mass, the
two-charge system displays solutions with naked timelike singularities even
though they do not violate a BPS bound. We suggest a string theoretic
resolution of these singularities.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:26:09 GMT"
},
{
"version": "v2",
"created": "Thu, 4 Oct 2007 08:29:02 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Balasubramanian",
"Vijay",
""
],
[
"de Boer",
"Jan",
""
],
[
"Jejjala",
"Vishnu",
""
],
[
"Simon",
"Joan",
""
]
] |
0707.3602 | Salman Rogers Dr | Salman S. Rogers, Thomas A. Waigh, Xiubo Zhao and Jian R. Lu | Precise Particle Tracking Against a Complicated Background: Polynomial
Fitting with Gaussian Weight | null | null | 10.1088/1478-3975/4/3/008 | null | cond-mat.soft cond-mat.other | null | We present a new particle tracking software algorithm designed to accurately
track the motion of low-contrast particles against a background with large
variations in light levels. The method is based on a polynomial fit of the
intensity around each feature point, weighted by a Gaussian function of the
distance from the centre, and is especially suitable for tracking endogeneous
particles in the cell, imaged with bright field, phase contrast or fluorescence
optical microscopy. Furthermore, the method can simultaneously track particles
of all different sizes, and allows significant freedom in their shape. The
algorithm is evaluated using the quantitative measures of accuracy and
precision of previous authors, using simulated images at variable
signal-to-noise ratios. To these we add a new test of the error due to a
non-uniform background. Finally the tracking of particles in real cell images
is demonstrated. The method is made freely available for non-commencial use as
a software package with a graphical user-inferface, which can be run within the
Matlab programming environment.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:45:04 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Rogers",
"Salman S.",
""
],
[
"Waigh",
"Thomas A.",
""
],
[
"Zhao",
"Xiubo",
""
],
[
"Lu",
"Jian R.",
""
]
] |
0707.3603 | Nicolas Libedinsky | Nicolas Libedinsky | Sur la cat\'egorie des bimodules de Soergel | 22 pages, 1 figure, in french, application to BGG category added
(section 7) | null | null | null | math.RT | null | The Soergel category B of a Coxeter system (W,S) is a bimodule category over
a polynomial algebra on which W acts. It's a categorification of the Hecke
Algebra of (W,S). In this article we give a combinatorial description of
morphism spaces in B. As a corollary, we give an analogous description of the
morphisms in O_0-proj, where O_0 is the principal block of the BGG category O.
-----
La cat\'egorie B de Soergel d'un syst\`eme de Coxeter (W,S) est une
cat\'egorie de bimodules sur une alg\`ebre de polyn\^omes sur laquelle W agit.
C'est une cat\'egorification de l'alg\`ebre de Hecke de (W,S). Dans cet article
nous donnons une description combinatoire des espaces de morphismes dans B. En
corollaire, on obtient une description analogue des morphismes dans O_0-proj,
o\`u O_0 est le bloc principal de la cat\'egorie O de BGG.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 17:02:33 GMT"
},
{
"version": "v2",
"created": "Fri, 31 Aug 2007 16:00:36 GMT"
},
{
"version": "v3",
"created": "Wed, 12 Mar 2008 13:31:43 GMT"
}
] | 2008-03-12T00:00:00 | [
[
"Libedinsky",
"Nicolas",
""
]
] |
0707.3604 | Cullen Blake | Cullen H. Blake, Guillermo Torres, Joshua S. Bloom, B. Scott Gaudi | A New Low-Mass Eclipsing Binary from SDSS-II | 15 Pages, 9 Figures, 6 Tables. Replaced with version accepted to ApJ | Astrophys.J.684:635-643,2008 | 10.1086/589630 | null | astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present observations of a new low-mass double-lined eclipsing binary
system discovered using repeat observations of the celestial equator from the
Sloan Digital Sky Survey II. Using near-infrared photometry and optical
spectroscopy we have measured the properties of this short-period
[P=0.407037(14) d] system and its two components. We find the following
parameters for the two components: M_1=0.272+/-0.020 M_sun, R_1=0.268+/-0.010
R_sun, M_2=0.240+/-0.022 M_sun, R_2=0.248+/-0.0090 R_sun, T_1=3320+/-130 K,
T_2=3300+/-130 K. The masses and radii of the two components of this system
agree well with theoretical expectations based on models of low-mass stars,
within the admittedly large errors. Future synoptic surveys like Pan-STARRS and
LSST will produce a wealth of information about low-mass eclipsing systems and
should make it possible, with an increased reliance on follow-up observations,
to detect many systems with low-mass and sub-stellar companions. With the large
numbers of objects for which these surveys will produce high-quality
photometry, we suggest that it becomes possible to identify such systems even
with sparse time sampling and a relatively small number of individual
observations.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:49:32 GMT"
},
{
"version": "v2",
"created": "Tue, 17 Jun 2008 15:54:08 GMT"
}
] | 2010-04-29T00:00:00 | [
[
"Blake",
"Cullen H.",
""
],
[
"Torres",
"Guillermo",
""
],
[
"Bloom",
"Joshua S.",
""
],
[
"Gaudi",
"B. Scott",
""
]
] |
0707.3605 | Behcet Alpat | Behcet Alpat | Astroparticle Physics with AMS02 | 10 pages, 4 figures | Published on Conference Proceedings Vol. 93, "Frontier Objects in
Astrophysics and Particle Physics" F. Giovannelli and G. Mannocchi (Eds.),
SIF, Bologna 2007, pages 681-690 | null | null | astro-ph | null | The Alpha Magnetic Spectrometer (AMS02) experiment will be installed in 2009
on the International Space Station (ISS) for an operational period of at least
three years. The purpose of AMS02 experiment is to perform accurate, high
statistics, long duration measurements in space of charged cosmic rays in
rigidity range from 1 GV to 3 TV and of high energy photons up to few hundred
of GeV. In this work we will discuss the experimental details and the physics
capabilities of AMS02 on ISS.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:25:07 GMT"
},
{
"version": "v2",
"created": "Wed, 25 Jul 2007 10:46:36 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Alpat",
"Behcet",
""
]
] |
0707.3606 | Tao Hu | Tao Hu, B. I. Shklovskii | How a protein searches for its specific site on DNA: the role of
intersegment transfer | 9 pages, 7 figures | Phys. Rev. E 76, 051909 (2007). | 10.1103/PhysRevE.76.051909 | null | q-bio.BM cond-mat.soft | null | Proteins are known to locate their specific targets on DNA up to two orders
of magnitude faster than predicted by the Smoluchowski three-dimensional
diffusion rate. One of the mechanisms proposed to resolve this discrepancy is
termed "intersegment transfer". Many proteins have two DNA binding sites and
can transfer from one DNA segment to another without dissociation to water. We
calculate the target search rate for such proteins in a dense globular DNA,
taking into account intersegment transfer working in conjunction with DNA
motion and protein sliding along DNA. We show that intersegment transfer plays
a very important role in cases where the protein spends most of its time
adsorbed on DNA.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:52:08 GMT"
}
] | 2011-11-10T00:00:00 | [
[
"Hu",
"Tao",
""
],
[
"Shklovskii",
"B. I.",
""
]
] |
0707.3607 | Vladimir Retakh | Vladimir Retakh and Robert Lee Wilson | Algebras associated to acyclic directed graphs | 20 pages, Latex; an expanded and corrected version; to appear in
"Advances of Applied Mathematics" | null | null | null | math.CO math.RA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and study a class of algebras associated to generalized layered
graphs, i.e. directed graphs with a ranking function on their vertices. Each
finite directed acyclic graph admits countably many structures of a generalized
layered graph. We construct linear bases in such algebras and compute their
Hilbert series. Our interest to generalized layered graphs and algebras
associated to those graphs is motivated by their relations to factorizations of
polynomials over noncommutative rings.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 16:55:41 GMT"
},
{
"version": "v2",
"created": "Thu, 5 Jun 2008 17:16:28 GMT"
},
{
"version": "v3",
"created": "Wed, 11 Jun 2008 17:38:58 GMT"
}
] | 2008-06-11T00:00:00 | [
[
"Retakh",
"Vladimir",
""
],
[
"Wilson",
"Robert Lee",
""
]
] |
0707.3608 | Conrad Plaut | Conrad Plaut | An equivalent condition for a uniform space to be coverable | null | null | null | null | math.GN math.AT math.MG | null | We prove that an equivalent condition for a uniform space to be coverable is
that the images of the natural projections in the fundamental inverse system
are uniformly open in a certain sense. As corollaries we (1) obtain a concrete
way to find covering entourage, (2) correct an error in [3] and (3) show that
coverable is equivalent to chain connected and uniformly joinable in the sense
of arXiv:0706.3937.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 17:06:57 GMT"
},
{
"version": "v2",
"created": "Thu, 11 Oct 2007 17:18:39 GMT"
}
] | 2007-10-11T00:00:00 | [
[
"Plaut",
"Conrad",
""
]
] |
0707.3609 | Conrad Plaut | V. N. Berestovskii, C. Plaut | Covering R-trees | null | null | null | null | math.MG math.GN math.GT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that every inner metric space X is the metric quotient of a complete
R-tree via a free isometric action, which we call the covering R-tree of X. The
quotient mapping is a weak submetry (hence, open) and light. In the case of
compact 1-dimensional geodesic space X, the free isometric action is via a
subgroup of the fundamental group of X. In particular, the Sierpin'ski gasket
and carpet, and the Menger sponge all have the same covering R-tree, which is
complete and has at each point valency equal to the continuum. This latter
R-tree is of particular interest because it is "universal" in at least two
senses: First, every R-tree of valency at most the continuum can be
isometrically embedded in it. Second, every Peano continuum is the image of it
via an open light mapping. We provide a sketch of our previous construction of
the uniform universal cover in the special case of inner metric spaces, the
properties of which are used in the proof.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 17:16:13 GMT"
},
{
"version": "v2",
"created": "Wed, 10 Dec 2008 14:27:48 GMT"
}
] | 2008-12-10T00:00:00 | [
[
"Berestovskii",
"V. N.",
""
],
[
"Plaut",
"C.",
""
]
] |
0707.3610 | Clare Burrage | C. Burrage, A. C. Davis | P-term Strings and Semi-local Strings | 22 pages, no figures | JHEP 0711:023,2007 | 10.1088/1126-6708/2007/11/023 | null | hep-th | null | P-term potentials can give rise to Nielsen-Olesen or semi-local cosmic
strings. We present a general analysis of these cosmic strings where we derive
the Bogomol'nyi equations and field profiles for both types of string and
discuss their stability. We give an analysis of the fermionic zero modes that
could live on the strings and a brief discussion of the inflationary period
preceding their formation.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 17:16:17 GMT"
}
] | 2009-11-18T00:00:00 | [
[
"Burrage",
"C.",
""
],
[
"Davis",
"A. C.",
""
]
] |
0707.3611 | E. -Michael Ilgenfritz | I. L. Bogolubsky (JINR Dubna), V. G. Bornyakov (IHEP Protvino and ITEP
Moscow), G. Burgio (Univ. T\"ubingen), E.-M. Ilgenfritz and M.
M\"uller-Preussker (Humboldt-Univ. Berlin) and V. K. Mitrjushkin (JINR Dubna
and ITEP Moscow) | Improved Landau gauge fixing and the suppression of finite-volume
effects of the lattice gluon propagator | 10 pages, 4 figures, changes to match the journal version and the
Erratum | Phys.Rev.D77:014504,2008; Erratum-ibid.D77:039902,2008 | 10.1103/PhysRevD.77.014504 10.1103/PhysRevD.77.039902 | HU-EP-07/22 and ITEP-LAT/2007-13 | hep-lat | null | For the gluon propagator of pure SU(2) lattice gauge theory in the Landau
gauge we investigate the effect of Gribov copies and finite-volume effects.
Concerning gauge fixing, we enlarge the accessible gauge orbits by adding
non-periodic Z(2) gauge transformations and systematically employ the simulated
annealing algorithm. Strategies to keep all Z(2) sectors under control within
reasonable CPU time are discussed. We demonstrate that the finite-volume
effects in the infrared regime become ameliorated. Reaching a physical volume
of about (6.5 fm)^4, we find that the propagator, calculated with the indicated
improvements, becomes flat in the region of smallest momenta. First signs in 4d
of a final decrease towards vanishing momentum are discussed.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 17:26:51 GMT"
},
{
"version": "v2",
"created": "Tue, 15 Jan 2008 17:09:11 GMT"
}
] | 2016-03-28T00:00:00 | [
[
"Bogolubsky",
"I. L.",
"",
"JINR Dubna"
],
[
"Bornyakov",
"V. G.",
"",
"IHEP Protvino and ITEP\n Moscow"
],
[
"Burgio",
"G.",
"",
"Univ. Tübingen"
],
[
"Ilgenfritz",
"E. -M.",
"",
"Humboldt-Univ. Berlin"
],
[
"Müller-Preussker",
"M.",
"",
"Humboldt-Univ. Berlin"
],
[
"Mitrjushkin",
"V. K.",
"",
"JINR Dubna\n and ITEP Moscow"
]
] |
0707.3612 | Guang Ping He | Hua Zhong Li | Comment on Nongeometric Conditional Phase Shift via Adiabatic Evolution
of Dark Eigenstate | 3 pages | null | null | null | quant-ph | null | In a recent letter [Phy. Rev. Lett. 95, 080502 (2005)], it is claimed that
based on a new kind of quantum mechanical phase of wave function which is
neither dynamical nor geometrical a new kind of phase gate for quantum
computation is discovered. The origin of this phase is the adiabatic evolution
of a dark state. I would like to point out that these claims are questionable.
The so called new phase gate was based on a phase which was nothing new but has
been known for decades. It is something which has no physical meaning and is
not observable. It was also pointed out by [quant-ph/0509150v1] that [Phy. Rev.
Lett. 95, 080502 (2005)] was incorrect and the phase is the known geometric
phase. Here we present a totally different argument.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:51:15 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Li",
"Hua Zhong",
""
]
] |
0707.3613 | Henrik Ingerslev J{\o}rgensen | H. Ingerslev J{\o}rgensen, T. Novotn\'y, K. Grove-Rasmussen, K.
Flensberg, and P. E. Lindelof | Critical Current 0-$\pi$ Transition in Designed Josephson Quantum Dot
Junctions | 5 pages, 4 figures, (Supplementary information available at
http://www.fys.ku.dk/~hij/public/nl_supp.pdf) | NANO LETTERS 7 (8): 2441-2445 AUG 2007 | 10.1021/nl071152w | null | cond-mat.supr-con | null | We report on quantum dot based Josephson junctions designed specifically for
measuring the supercurrent. From high-accuracy fitting of the current-voltage
characteristics we determine the full magnitude of the supercurrent (critical
current). Strong gate modulation of the critical current is observed through
several consecutive Coulomb blockade oscillations. The critical current crosses
zero close to, but not at, resonance due to the so-called 0-$\pi$ transition in
agreement with a simple theoretical model.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:45:11 GMT"
}
] | 2007-09-19T00:00:00 | [
[
"Jørgensen",
"H. Ingerslev",
""
],
[
"Novotný",
"T.",
""
],
[
"Grove-Rasmussen",
"K.",
""
],
[
"Flensberg",
"K.",
""
],
[
"Lindelof",
"P. E.",
""
]
] |
0707.3614 | Andrei Pimenov | A. Pimenov, A. Loidl, A. A. Mukhin, V. D. Travkin, V. Yu. Ivanov and
A. M. Balbashov | Terahertz spectroscopy of electromagnons in Eu_{1-x}Y_xMnO_3 | 7 pages, 9 figures included | Phys. Rev. B 77, 014438 (2008) | 10.1103/PhysRevB.77.014438 | null | cond-mat.str-el cond-mat.mtrl-sci | null | Dielectric permittivity spectra of yttrium-doped EuMnO$_3$ in the composition
range 0 =< x =< 0.5 have been investigated in the terahertz frequency range.
Magnetoelectric contributions to the permittivity were observed in all
compositions for ac electric fields parallel to the crystallographic a-axis.
Well defined electromagnons exist for x >= 0.2 close to \nu ~ 20 cm^{-1} and
with dielectric strength strongly increasing on doping. In addition to
electromagnons, a broad contribution of magnetoelectric origin is observed for
all compositions. For Eu_{0.8}Y_{0.2}MnO_3 the electromagnons can be suppressed
by external magnetic fields which induce a canted antiferromagnetic phase.
Magnetoelectric effects in the different doping regimes are discussed in
detail.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 17:47:08 GMT"
}
] | 2008-03-04T00:00:00 | [
[
"Pimenov",
"A.",
""
],
[
"Loidl",
"A.",
""
],
[
"Mukhin",
"A. A.",
""
],
[
"Travkin",
"V. D.",
""
],
[
"Ivanov",
"V. Yu.",
""
],
[
"Balbashov",
"A. M.",
""
]
] |
0707.3615 | Joel Foisy | Chris Cicotta, Joel Foisy, Tom Reilly, Sara Revzi, Ben Wang, Alice
Wilson | Two Analogs of Intrinsically Linked Graphs | 10 pages, 2 figures | null | null | null | math.GT math.CO | null | A graph G is intrinsically S^1-linked if for every embedding of the vertices
of G into S^1, vertices that form the endpoints of two disjoint edges in G form
a non-split link in the embedding. We show that a graph is intrinsically
S^1-linked if and only if it is not outer-planar. A graph is outer-flat if it
can be embedded in the 3-ball such that all of its vertices map to the boundary
of the 3-ball, all edges to the interior, and every cycle bounds a disk in the
3-ball that meets the graph only along its boundary. We show that a graph is
outer-flat if and only if it is planar.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:57:37 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Cicotta",
"Chris",
""
],
[
"Foisy",
"Joel",
""
],
[
"Reilly",
"Tom",
""
],
[
"Revzi",
"Sara",
""
],
[
"Wang",
"Ben",
""
],
[
"Wilson",
"Alice",
""
]
] |
0707.3616 | Denis L'Hote | Fran\c{c}ois Ladieu (SPEC), Caroline Thibierge (SPEC), Denis L'H\^ote
(SPEC) | Experimental search for dynamic heterogeneities in molecular glass
formers | 7 pages | Journal of Physics: Condensed Matter 19, 20 (2007) 205138 | 10.1088/0953-8984/19/20/205138 | null | cond-mat.stat-mech | null | We have measured the linear dielectric susceptibility of two molecular glass
formers close to Tg in order to estimate the size of the dynamically correlated
clusters of molecules which are expected to govern the physics of glass
formation. This size has been shown to be related to the dynamic dielectric
susceptibility dEps(w)/dT (Eps : dielectric susceptibility, T : temperature,
w: frequency). To allow for an accurate determination of the T
derivative, we scanned the interval 192 < T < 232 K every 1 K for glycerol and
159 < T < 179 K every 0.5 K for propylene carbonate. The resolution on T
variations was about 1 mK. The result for glycerol is that the number of
correlated molecules increases by a factor 3 when T goes from 226 to 195 K. It
has been shown that the non-linear susceptibility provides a direct measurement
of dynamic correlations. To measure it, we used a standard Lockin technique
yielding the third harmonic of the current flowing out of a capacitor. We
obtained only an upper limit on the ratio of the third to the first harmonic,
due to the non-linear response of standard electronics.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:31:06 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ladieu",
"François",
"",
"SPEC"
],
[
"Thibierge",
"Caroline",
"",
"SPEC"
],
[
"L'Hôte",
"Denis",
"",
"SPEC"
]
] |
0707.3617 | Patricia Liebing | P. Liebing (for the HERMES Collaboration) | Extraction Of Delta g/g From Hermes Data On Inclusive Charged Hadrons | 4 pages, 2 figures, Proceedings of Spin 2006, Kyoto, Japan, 2-7 Oct.
2006 | AIP Conf.Proc.915:331-334,2007 | 10.1063/1.2750789 | Hermes Document 06-106 | hep-ex | null | Hermes has measured longitudinal double spin asymmetries as a function of
transverse momentum pT using charged inclusive hadrons from electroproduction
off a deuterium target. At pT>1 GeV, the asymmetries are sensitive to the spin
dependent gluon distribution Delta g. To extract the gluon polarization Delta
g/g, information on the background asymmetry and the subprocess kinematics has
been obtained from a Leading Order Monte Carlo model. Values for Delta g/g have
been calculated both as a function of the measured pT and x, using two
different methods, in the region pT>1.05 GeV.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:40:28 GMT"
}
] | 2019-08-13T00:00:00 | [
[
"Liebing",
"P.",
"",
"for the HERMES Collaboration"
]
] |
0707.3618 | Rene Bellwied | Rene Bellwied | Particle production mechanisms from RHIC to LHC | 8 pages, 4 figures. Proceedings for the 23rd Winter Workshop on
Nuclear Dynamics, Big Sky (Montana), USA, 11-18 February 2007 | PoSLHC07:011,2007 | null | null | nucl-ex | null | I will review RHIC data with respect to the intriguing possibility that the
hadron production mechanism in the produced partonic medium might be different
than in vacuum. I will use the measurements of collective features, such as
flow and quenching of identified particles, to show that different regions of
the particle momentum spectrum are likely populated through different
mechanisms, and that the medium seems to play an important role in
hadronization. Finally I will address the question whether the different
initial conditions achievable in heavy ion collisions at LHC energies, compared
to RHIC, might affect the properties of the deconfined quark-gluon phase and
its hadronization to baryonic matter.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:16:13 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Bellwied",
"Rene",
""
]
] |
0707.3619 | Alexander Tiskin | Alexander Tiskin | Semi-local string comparison: algorithmic techniques and applications | null | null | null | null | cs.DS cs.DM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A classical measure of string comparison is given by the longest common
subsequence (LCS) problem on a pair of strings. We consider its generalisation,
called the semi-local LCS problem, which arises naturally in many
string-related problems. The semi-local LCS problem asks for the LCS scores for
each of the input strings against every substring of the other input string,
and for every prefix of each input string against every suffix of the other
input string. Such a comparison pattern provides a much more detailed picture
of string similarity than a single LCS score; it also arises naturally in many
string-related problems. In fact, the semi-local LCS problem turns out to be
fundamental for string comparison, providing a powerful and flexible
alternative to classical dynamic programming. It is especially useful when the
input to a string comparison problem may not be available all at once: for
example, comparison of dynamically changing strings; comparison of compressed
strings; parallel string comparison. The same approach can also be applied to
permutation strings, providing efficient solutions for local versions of the
longest increasing subsequence (LIS) problem, and for the problem of computing
a maximum clique in a circle graph. Furthermore, the semi-local LCS problem
turns out to have surprising connections in a few seemingly unrelated fields,
such as computational geometry and algebra of semigroups. This work is devoted
to exploring the structure of the semi-local LCS problem, its efficient
solutions, and its applications in string comparison and other related areas,
including computational molecular biology.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:12:23 GMT"
},
{
"version": "v10",
"created": "Wed, 5 Aug 2009 16:07:43 GMT"
},
{
"version": "v11",
"created": "Thu, 20 Aug 2009 22:16:33 GMT"
},
{
"version": "v12",
"created": "Mon, 31 Aug 2009 13:08:55 GMT"
},
{
"version": "v13",
"created": "Mon, 19 Oct 2009 14:48:06 GMT"
},
{
"version": "v14",
"created": "Fri, 11 Dec 2009 20:34:12 GMT"
},
{
"version": "v15",
"created": "Sat, 9 Jan 2010 16:22:30 GMT"
},
{
"version": "v16",
"created": "Tue, 11 May 2010 11:43:57 GMT"
},
{
"version": "v17",
"created": "Tue, 21 Feb 2012 22:50:39 GMT"
},
{
"version": "v18",
"created": "Thu, 20 Sep 2012 12:52:02 GMT"
},
{
"version": "v19",
"created": "Mon, 28 Jan 2013 02:37:21 GMT"
},
{
"version": "v2",
"created": "Mon, 8 Oct 2007 13:29:39 GMT"
},
{
"version": "v20",
"created": "Wed, 20 Nov 2013 20:54:28 GMT"
},
{
"version": "v21",
"created": "Sat, 23 Nov 2013 23:30:05 GMT"
},
{
"version": "v3",
"created": "Tue, 6 Nov 2007 14:09:50 GMT"
},
{
"version": "v4",
"created": "Thu, 21 Aug 2008 15:17:48 GMT"
},
{
"version": "v5",
"created": "Mon, 17 Nov 2008 22:31:37 GMT"
},
{
"version": "v6",
"created": "Wed, 10 Dec 2008 19:46:02 GMT"
},
{
"version": "v7",
"created": "Mon, 12 Jan 2009 17:49:28 GMT"
},
{
"version": "v8",
"created": "Sun, 22 Mar 2009 16:36:29 GMT"
},
{
"version": "v9",
"created": "Mon, 6 Jul 2009 15:59:42 GMT"
}
] | 2015-03-13T00:00:00 | [
[
"Tiskin",
"Alexander",
""
]
] |
0707.3620 | Pablo Mininni | P. D. Mininni, A. Pouquet | Energy spectra stemming from interactions of Alfven waves and turbulent
eddies | 4 pages, 4 figures | Phys.Rev.Lett.99:254502,2007 | 10.1103/PhysRevLett.99.254502 | null | astro-ph | null | We present a numerical analysis of an incompressible decaying
magnetohydrodynamic turbulence run on a grid of 1536^3 points. The Taylor
Reynolds number at the maximum of dissipation is ~1100, and the initial
condition is a superposition of large scale ABC flows and random noise at small
scales, with no uniform magnetic field. The initial kinetic and magnetic
energies are equal, with negligible correlation. The resulting energy spectrum
is a combination of two components, each moderately resolved. Isotropy obtains
in the large scales, with a spectral law compatible with the
Iroshnikov-Kraichnan theory stemming from the weakening of nonlinear
interactions due to Alfven waves; scaling of structure functions confirms the
non-Kolmogorovian nature of the flow in this range. At small scales, weak
turbulence emerges with a k_{\perp}^{-2} spectrum, the perpendicular direction
referring to the local quasi-uniform magnetic field.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:29:05 GMT"
}
] | 2009-06-23T00:00:00 | [
[
"Mininni",
"P. D.",
""
],
[
"Pouquet",
"A.",
""
]
] |
0707.3621 | Thimo Rohlf | Thimo Rohlf | Critical Line in Random Threshold Networks with Inhomogeneous Thresholds | 18 figures, 17 pages revtex | null | 10.1103/PhysRevE.78.066118 | null | cond-mat.dis-nn cond-mat.stat-mech nlin.CG q-bio.MN | null | We calculate analytically the critical connectivity $K_c$ of Random Threshold
Networks (RTN) for homogeneous and inhomogeneous thresholds, and confirm the
results by numerical simulations. We find a super-linear increase of $K_c$ with
the (average) absolute threshold $|h|$, which approaches $K_c(|h|) \sim
h^2/(2\ln{|h|})$ for large $|h|$, and show that this asymptotic scaling is
universal for RTN with Poissonian distributed connectivity and threshold
distributions with a variance that grows slower than $h^2$. Interestingly, we
find that inhomogeneous distribution of thresholds leads to increased
propagation of perturbations for sparsely connected networks, while for densely
connected networks damage is reduced; the cross-over point yields a novel,
characteristic connectivity $K_d$, that has no counterpart in Boolean networks.
Last, local correlations between node thresholds and in-degree are introduced.
Here, numerical simulations show that even weak (anti-)correlations can lead to
a transition from ordered to chaotic dynamics, and vice versa. It is shown that
the naive mean-field assumption typical for the annealed approximation leads to
false predictions in this case, since correlations between thresholds and
out-degree that emerge as a side-effect strongly modify damage propagation
behavior.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:45:08 GMT"
},
{
"version": "v2",
"created": "Thu, 21 Feb 2008 15:38:50 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Rohlf",
"Thimo",
""
]
] |
0707.3622 | Yaoyun Shi | Igor Markov (University of Michigan) and Yaoyun Shi (University of
Michigan) | Constant-degree graph expansions that preserve the treewidth | 12 pages, 6 figures, the main result used by quant-ph/0511070 | Algorithmica, Volume 59, Number 4, 461-470,2011 | 10.1007/s00453-009-9312-5 | null | cs.DM cs.DS math.CO quant-ph | null | Many hard algorithmic problems dealing with graphs, circuits, formulas and
constraints admit polynomial-time upper bounds if the underlying graph has
small treewidth. The same problems often encourage reducing the maximal degree
of vertices to simplify theoretical arguments or address practical concerns.
Such degree reduction can be performed through a sequence of splittings of
vertices, resulting in an _expansion_ of the original graph. We observe that
the treewidth of a graph may increase dramatically if the splittings are not
performed carefully. In this context we address the following natural question:
is it possible to reduce the maximum degree to a constant without substantially
increasing the treewidth?
Our work answers the above question affirmatively. We prove that any simple
undirected graph G=(V, E) admits an expansion G'=(V', E') with the maximum
degree <= 3 and treewidth(G') <= treewidth(G)+1. Furthermore, such an expansion
will have no more than 2|E|+|V| vertices and 3|E| edges; it can be computed
efficiently from a tree-decomposition of G. We also construct a family of
examples for which the increase by 1 in treewidth cannot be avoided.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:56:27 GMT"
}
] | 2011-11-04T00:00:00 | [
[
"Markov",
"Igor",
"",
"University of Michigan"
],
[
"Shi",
"Yaoyun",
"",
"University of\n Michigan"
]
] |
0707.3623 | Thomas Timusk | J. Hwang, T. Timusk, and J. P. Carbotte | Role of magnetism and electron-lattice interactions in STM spectra of
cuprates | null | Nature 446, 7132: E3-E4 (2007) | null | null | cond-mat.supr-con | null | The study of bosonic modes that couple to the charge carriers is a key
element in understanding superconductivity. Lee et al. have used
atomic-resolution scanning tunneling spectroscopy (STM) in an attempt to
extract the spectrum of of these modes in the high temperature superconductor
Bi2Sr2CaCu2O8+d and they found a mode whose frequency did not depend on doping
but changed on 16O to 18O isotopic substitution leading them to suggest a role
for lattice modes (phonons). A careful examination of their published data
reveals a weaker but distinct feature that has all the characteristics of the
magnetic excitation identified as the bosonic mode in other competing
experiments. We suggest the lattice mode seen by Lee et al. is not relevant to
superconductivity and is due to inelastic tunneling through the insulating
oxide layer.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:53:56 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Hwang",
"J.",
""
],
[
"Timusk",
"T.",
""
],
[
"Carbotte",
"J. P.",
""
]
] |
0707.3624 | Asish Ganguly | A. Ganguly and L. M. Nieto | Shape-invariant quantum Hamiltonian with position-dependent effective
mass through second order supersymmetry | 16 pages, 5 figs; Present e-mail of AG: [email protected] | J.Phys.A40:7265-7281,2007 | 10.1088/1751-8113/40/26/012 | null | quant-ph hep-th math-ph math.MP | null | Second order supersymmetric approach is taken to the system describing motion
of a quantum particle in a potential endowed with position-dependent effective
mass. It is shown that the intertwining relations between second order partner
Hamiltonians may be exploited to obtain a simple shape-invariant condition.
Indeed a novel relation between potential and mass functions is derived, which
leads to a class of exactly solvable model. As an illustration of our
procedure, two examples are given for which one obtains whole spectra
algebraically. Both shape-invariant potentials exhibit harmonic-oscillator-like
or singular-oscillator-like spectra depending on the values of the
shape-invariant parameter.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 18:54:10 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Ganguly",
"A.",
""
],
[
"Nieto",
"L. M.",
""
]
] |
0707.3625 | Gregory Shields | G. A. Shields, E. W. Bonning, S. Salviander | Quasars with a Kick -- Black Hole Recoil in Quasars | 5 pages, to appear in "Black Holes. Poster Papers from the Space
Telescope Science Institute Symposium, April 2007," Mario Livio and Anton
Koekemoer, eds., STScI | null | null | null | astro-ph | null | Mergers of spinning black holes can give recoil velocities from gravitational
radiation up to several thousand km/s. A recoiling supermassive black hole in
an AGN can retain the inner part of its accretion disk, providing fuel for
continuing AGN activity. Using AGN in the Sloan Digital Sky Survey (SDSS) that
show velocity shifts of the broad emission lines relative to the narrow lines,
we place upper limits on the incidence of high velocity recoils in AGN. Brief
but powerful flares in soft X-rays may occur when bound material falls back
into the moving accretion disk.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:00:37 GMT"
}
] | 2007-07-25T00:00:00 | [
[
"Shields",
"G. A.",
""
],
[
"Bonning",
"E. W.",
""
],
[
"Salviander",
"S.",
""
]
] |
0707.3626 | Ming-Hao Liu | Ming-Hao Liu, Gustav Bihlmayer, Stefan Bl\"ugel, Ching-Ray Chang | Intrinsic spin-Hall accumulation in honeycomb lattices: Band structure
effects | 4 pages, 4 figures | Phys. Rev. B 76, 121301(R) (2007) | 10.1103/PhysRevB.76.121301 | null | cond-mat.mes-hall | null | Local spin and charge densities on a two-dimensional honeycomb lattice are
calculated by the Landauer-Keldysh formalism (LKF). Through the empirical
tight-binding method, we show how the realistic band structure can be brought
into the LKF. Taking the Bi(111) surface, on which strong surface states and
Rashba spin-orbit coupling are present [Phys. Rev. Lett. 93, 046403 (2004)], as
a numeric example, we show typical intrinsic spin-Hall accumulation (ISHA)
patterns thereon. The Fermi-energy-dependence of the spin and charge transport
in two-terminal nanostructure samples is subsequently analyzed. By changing
E_{F}, we show that the ISHA pattern is nearly isotropic (free-electron-like)
only when E_{F} is close to the band bottom, and is sensitive/insensitive to
E_{F} for the low/high bias regime with such E_{F}. With E_{F} far from the
band bottom, band structure effects thus enter the ISHA patterns and the
transport direction becomes significant.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:03:56 GMT"
},
{
"version": "v2",
"created": "Thu, 6 Sep 2007 07:59:57 GMT"
},
{
"version": "v3",
"created": "Sat, 8 Sep 2007 11:28:24 GMT"
}
] | 2007-09-08T00:00:00 | [
[
"Liu",
"Ming-Hao",
""
],
[
"Bihlmayer",
"Gustav",
""
],
[
"Blügel",
"Stefan",
""
],
[
"Chang",
"Ching-Ray",
""
]
] |
0707.3627 | Edward S. Letzter | Edward S. Letzter and Linhong Wang | Prime Ideals of q-Commutative Power Series Rings | Revised; to appear in Algebras and Representation Theory. In this
(final) version, catenarity is established, by combining normal separation
with results of Chan, Wu, Yekutieli, and Zhang. | null | null | null | math.RA math.QA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the "q-commutative" power series ring R:=k_q[[x_1,...,x_n]], defined
by the relations x_ix_j = q_{ij}x_j x_i, for multiplicatively antisymmetric
scalars q_{ij} in a field k. Our results provide a detailed account of prime
ideal structure for a class of noncommutative, complete, local, noetherian
domains having arbitrarily high (but finite) Krull, global, and classical Krull
dimension. In particular, we prove that the prime spectrum of R is normally
separated and is finitely stratified by commutative noetherian spectra.
Combining this normal separation with results of Chan, Wu, Yekutieli, and
Zhang, we are able to conclude that R is catenary. Following the approach of
Brown and Goodearl, we also show that links between prime ideals are provided
by canonical automorphisms. Moreover, for sufficiently generic q_{ij}, we find
that R has only finitely many prime ideals and is a UFD (in the sense of
Chatters).
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:05:00 GMT"
},
{
"version": "v2",
"created": "Tue, 7 Aug 2007 20:31:21 GMT"
},
{
"version": "v3",
"created": "Mon, 21 Jul 2008 02:08:03 GMT"
},
{
"version": "v4",
"created": "Wed, 10 Dec 2008 20:32:28 GMT"
},
{
"version": "v5",
"created": "Mon, 15 Mar 2010 02:28:24 GMT"
}
] | 2010-03-16T00:00:00 | [
[
"Letzter",
"Edward S.",
""
],
[
"Wang",
"Linhong",
""
]
] |
0707.3628 | Carlos Grossi | Carlos H. Grossi | On the type of triangle groups | 10 pages, 3 figures | Geometriae Dedicata (2007) 130 (1): 137-148 | 10.1007/s10711-007-9209-x | null | math.DG | null | We prove a conjecture of R. Schwartz about the type of some complex
hyperbolic triangle groups.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 19:09:38 GMT"
}
] | 2011-11-01T00:00:00 | [
[
"Grossi",
"Carlos H.",
""
]
] |
0707.3629 | Xianglin Ke | X. Ke, R. S. Freitas, B. G. Ueland, G. C. Lau, M. L. Dahlberg, R. J.
Cava, R. Moessner, and P. Schiffer | Non-monotonic zero point entropy in diluted spin ice | Accepted to be published in Phys. Rev. Lett | Phys. Rev. Lett. 99, 137203 (2007) | 10.1103/PhysRevLett.99.137203 | null | cond-mat.str-el cond-mat.mtrl-sci | null | Water ice and spin ice are important model systems in which theory can
directly account for zero point entropy associated with quenched
configurational disorder. Spin ice differs from water ice in the important
respect that its fundamental constituents, the spins of the magnetic ions, can
be removed through replacement with non-magnetic ions while keeping the lattice
structure intact. In order to investigate the interplay of frustrated
interactions and quenched disorder, we have performed systematic heat capacity
measurements on spin ice materials which have been thus diluted up to 90%.
Investigations of both Ho and Dy spin ices reveal that the zero point entropy
depends non-monotonically on dilution and approaches the value of Rln2 in the
limit of high dilution. The data are in good agreement with a generalization of
Pauling's theory for the entropy of ice.
| [
{
"version": "v1",
"created": "Tue, 24 Jul 2007 21:11:45 GMT"
}
] | 2009-11-13T00:00:00 | [
[
"Ke",
"X.",
""
],
[
"Freitas",
"R. S.",
""
],
[
"Ueland",
"B. G.",
""
],
[
"Lau",
"G. C.",
""
],
[
"Dahlberg",
"M. L.",
""
],
[
"Cava",
"R. J.",
""
],
[
"Moessner",
"R.",
""
],
[
"Schiffer",
"P.",
""
]
] |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.