Resolution of a current-mode algorithmic analog-to-digital converter

Abstract: Errors limiting the resolution of current-mode algorithmic analog-to-digital converters are mainly related to current mirror operation. While systematic errors can be minimized by proper circuit techniques, random sources are unavoidable. In this paper a statistical analysis of the resolution of a typical converter is carried out taking into account process tolerances. To support the analysis, a 4-bit ADC, realized in a 0.35- mu m CMOS technology, was exhaustively simulated. Results were found to be in excellent agreement with theoretical derivations

resolut of a current-mod algorithm analog-to-digit convert
 error limit the resolut of current-mod algorithm analog-to-digit convert are mainli relat to current mirror oper . while systemat error can be minim by proper circuit techniqu , random sourc are unavoid . in thi paper a statist analysi of the resolut of a typic convert is carri out take into account process toler . to support the analysi , a 4-bit adc , realiz in a 0.35- mu m cmo technolog , wa exhaust simul . result were found to be in excel agreement with theoret deriv

resolution
analog-to-digital converters
circuit techniques
statistical analysis
CMOS technology
current-mode ADC
algorithmic ADC
A/D converters
error analysis
tolerance analysis
circuit analysis
0.35 micron
4 bit


Time-integration of multiphase chemistry in size-resolved cloud models

Abstract: The existence of cloud drops leads to a transfer of chemical species between the gas and aqueous phases. Species concentrations in both phases are modified by chemical reactions and by this phase transfer. The model equations resulting from such multiphase chemical systems are nonlinear, highly coupled and extremely stiff. In the paper we investigate several numerical approaches for treating such processes. The droplets are subdivided into several classes. This decomposition of the droplet spectrum into classes is based on their droplet size and the amount of scavenged material inside the drops, respectively. The very fast dissociations in the aqueous phase chemistry are treated as forward and backward reactions. The aqueous phase and gas phase chemistry, the mass transfer between the different droplet classes among themselves and with the gas phase are integrated in an implicit and coupled manner by the second order BDF method. For this part we apply a modification of the code LSODE with special linear system solvers. These direct sparse techniques exploit the special block structure of the corresponding Jacobian. Furthermore we investigate an approximate matrix factorization which is related to operator splitting at the linear algebra level. The sparse Jacobians are generated explicitly and stored in a sparse form. The efficiency and accuracy of our time-integration schemes is discussed for four multiphase chemistry systems of different complexity and for a different number of droplet classes

time-integr of multiphas chemistri in size-resolv cloud model
 the exist of cloud drop lead to a transfer of chemic speci between the ga and aqueou phase . speci concentr in both phase are modifi by chemic reaction and by thi phase transfer . the model equat result from such multiphas chemic system are nonlinear , highli coupl and extrem stiff . in the paper we investig sever numer approach for treat such process . the droplet are subdivid into sever class . thi decomposit of the droplet spectrum into class is base on their droplet size and the amount of scaveng materi insid the drop , respect . the veri fast dissoci in the aqueou phase chemistri are treat as forward and backward reaction . the aqueou phase and ga phase chemistri , the mass transfer between the differ droplet class among themselv and with the ga phase are integr in an implicit and coupl manner by the second order bdf method . for thi part we appli a modif of the code lsode with special linear system solver . these direct spars techniqu exploit the special block structur of the correspond jacobian . furthermor we investig an approxim matrix factor which is relat to oper split at the linear algebra level . the spars jacobian are gener explicitli and store in a spars form . the effici and accuraci of our time-integr scheme is discuss for four multiphas chemistri system of differ complex and for a differ number of droplet class

multiphase chemistry
size-resolved cloud models
cloud drops
chemical species
chemical reactions
multiphase chemical systems
aqueous phase chemistry
gas phase chemistry
approximate matrix factorization
operator splitting
linear algebra
sparse Jacobians
time-integration schemes
air pollution modelling


Resonant controllers for smart structures

Abstract: In this paper we propose a special type of colocated feedback controller for smart structures. The controller is a parallel combination of high-Q resonant circuits. Each of the resonant circuits is tuned to a pole (or the resonant frequency) of the smart structure. It is proven that the parallel combination of resonant controllers is stable with an infinite gain margin. Only one set of actuator-sensor can damp multiple resonant modes with the resonant controllers. Experimental results are presented to show the robustness of the proposed controller in damping multimode resonances

reson control for smart structur
 in thi paper we propos a special type of coloc feedback control for smart structur . the control is a parallel combin of high-q reson circuit . each of the reson circuit is tune to a pole ( or the reson frequenc ) of the smart structur . it is proven that the parallel combin of reson control is stabl with an infinit gain margin . onli one set of actuator-sensor can damp multipl reson mode with the reson control . experiment result are present to show the robust of the propos control in damp multimod reson

smart structures
smart structures
feedback controller
high-Q resonant circuits
resonant frequency
actuator-sensor
damping
multiple resonant modes
multimode resonances
smart structure
laminate beam


Public business libraries: the next chapter

Abstract: Traces the history of the provision of business information by Leeds Public Libraries, UK, from the opening of the Public Commercial and Technical Library in 1918 to the revolutionary impact of the Internet in the 1990s. Describes how the Library came to terms with the need to integrate the Internet into its mainstream business information services, with particular reference to its limitations and to the provision of company information, market research, British Standards information, press cuttings and articles from specialized trade and scientific journals, and patents information. Focuses on some of the reasons why the public business library is still needed as a service to businesses, even after the introduction of the Internet and considers the Library's changing role and the need to impress on all concerned, especially government, the continuing value of these services. Looks to the partnerships formed by the Library over the years and the ways in which these are expected to assist in realizing future opportunities, in particular, the fact that all public libraries in England gained free Internet access at the end of 2001. Offers some useful ideas about how the Library could develop, noting that SINTO, a Sheffield based information network formed in 1938 and originally a partnership between the public library, the two Sheffield universities and various leading steel companies of the time, is being examined as a model for future services in Leeds. Concludes that the way forward can be defined in terms of five actions: redefinition of priorities; marketing; budgets; resources; and the use of information technology (IT)

public busi librari : the next chapter
 trace the histori of the provis of busi inform by leed public librari , uk , from the open of the public commerci and technic librari in 1918 to the revolutionari impact of the internet in the 1990 . describ how the librari came to term with the need to integr the internet into it mainstream busi inform servic , with particular refer to it limit and to the provis of compani inform , market research , british standard inform , press cut and articl from special trade and scientif journal , and patent inform . focus on some of the reason whi the public busi librari is still need as a servic to busi , even after the introduct of the internet and consid the librari 's chang role and the need to impress on all concern , especi govern , the continu valu of these servic . look to the partnership form by the librari over the year and the way in which these are expect to assist in realiz futur opportun , in particular , the fact that all public librari in england gain free internet access at the end of 2001 . offer some use idea about how the librari could develop , note that sinto , a sheffield base inform network form in 1938 and origin a partnership between the public librari , the two sheffield univers and variou lead steel compani of the time , is be examin as a model for futur servic in leed . conclud that the way forward can be defin in term of five action : redefinit of prioriti ; market ; budget ; resourc ; and the use of inform technolog ( it )

public business libraries
history
Leeds Public Libraries
Public Commercial and Technical Library
Internet
business information services
company information
market research
marketing
British Standards information
press cuttings
patents information
government
SINTO
information network
Sheffield universities
steel companies
budgets
resources
trade journal articles
scientific journal articles
priority redefinition
IT use

P P P P P P P P P P P P P P P P P P P R R R R


Process pioneers [agile business]

Abstract: By managing IT infrastructures along so-called 'top down' lines, organisations can streamline their business processes, eliminate redundant tasks and increase automation

process pioneer [ agil busi ]
 by manag it infrastructur along so-cal ' top down ' line , organis can streamlin their busi process , elimin redund task and increas autom

agile business
managing IT infrastructures
business processes
increase automation


Text-independent speaker verification using utterance level scoring and covariance modeling

Abstract: This paper describes a computationally simple method to perform text independent speaker verification using second order statistics. The suggested method, called utterance level scoring (ULS), allows one to obtain a normalized score using a single pass through the frames of the tested utterance. The utterance sample covariance is first calculated and then compared to the speaker covariance using a distortion measure. Subsequently, a distortion measure between the utterance covariance and the sample covariance of data taken from different speakers is used to normalize the score. Experimental results from the 2000 NIST speaker recognition evaluation are presented for ULS, used with different distortion measures, and for a Gaussian mixture model (GMM) system. The results indicate that ULS as a viable alternative to GMM whenever the computational complexity and verification accuracy needs to be traded

text-independ speaker verif use utter level score and covari model
 thi paper describ a comput simpl method to perform text independ speaker verif use second order statist . the suggest method , call utter level score ( ul ) , allow one to obtain a normal score use a singl pass through the frame of the test utter . the utter sampl covari is first calcul and then compar to the speaker covari use a distort measur . subsequ , a distort measur between the utter covari and the sampl covari of data taken from differ speaker is use to normal the score . experiment result from the 2000 nist speaker recognit evalu are present for ul , use with differ distort measur , and for a gaussian mixtur model ( gmm ) system . the result indic that ul as a viabl altern to gmm whenev the comput complex and verif accuraci need to be trade

text-independent speaker verification
utterance level scoring
covariance modeling
computationally simple method
second order statistics
normalized score
sample covariance
speaker covariance
distortion measure
distortion measure
NIST speaker recognition evaluation
Gaussian mixture model
GMM
computational complexity
verification accuracy
distortion measures


Deterministic calculations of photon spectra for clinical accelerator targets

Abstract: A method is proposed to compute photon energy spectra produced in clinical electron accelerator targets, based on the deterministic solution of the Boltzmann equation for coupled electron-photon transport in one-dimensional (1-D) slab geometry. It is shown that the deterministic method gives similar results as Monte Carlo calculations over the angular range of interest for therapy applications. Relative energy spectra computed by deterministic and 3-D Monte Carlo methods, respectively, are compared for several realistic target materials and different electron beams, and are found to give similar photon energy distributions and mean energies. The deterministic calculations typically require 1-2 mins of execution time on a Sun Workstation, compared to 2-36 h for the Monte Carlo runs

determinist calcul of photon spectra for clinic acceler target
 a method is propos to comput photon energi spectra produc in clinic electron acceler target , base on the determinist solut of the boltzmann equat for coupl electron-photon transport in one-dimension ( 1-d ) slab geometri . it is shown that the determinist method give similar result as mont carlo calcul over the angular rang of interest for therapi applic . rel energi spectra comput by determinist and 3-d mont carlo method , respect , are compar for sever realist target materi and differ electron beam , and are found to give similar photon energi distribut and mean energi . the determinist calcul typic requir 1 - 2 min of execut time on a sun workstat , compar to 2 - 36 h for the mont carlo run

deterministic calculations
photon energy spectra
clinical electron accelerator targets
Boltzmann equation
coupled electron-photon transport
angular range of interest
therapy applications
relative energy spectra
3-D Monte Carlo methods
one-dimensional slab geometry
linear accelerator
therapy planning
integrodifferential equation
pencil beam source representations


Is open source more or less secure?

Abstract: Networks dominate today's computing landscape and commercial technical protection is lagging behind attack technology. As a result, protection programme success depends more on prudent management decisions than on the selection of technical safeguards. The paper takes a management view of protection and seeks to reconcile the need for security with the limitations of technology

is open sourc more or less secur ?
 network domin today 's comput landscap and commerci technic protect is lag behind attack technolog . as a result , protect programm success depend more on prudent manag decis than on the select of technic safeguard . the paper take a manag view of protect and seek to reconcil the need for secur with the limit of technolog

commercial technical protection
attack technology
management
open source software security
computer networks
data security


Simulation of cardiovascular physiology: the diastolic function(s) of the heart

Abstract: The cardiovascular system was simulated by using an equivalent electronic circuit. Four sets of simulations were performed. The basic variables investigated were cardiac output and stroke volume. They were studied as functions (i) of right ventricular capacitance and negative intrathoracic pressure; (ii) of left ventricular relaxation and of heart rate; and (iii) of left ventricle failure. It seems that a satisfactory simulation of systolic and diastolic functions of the heart is possible. Presented simulations improve our understanding of the role of the capacitance of both ventricles and of the diastolic relaxation in cardiovascular physiology

simul of cardiovascular physiolog : the diastol function( ) of the heart
 the cardiovascular system wa simul by use an equival electron circuit . four set of simul were perform . the basic variabl investig were cardiac output and stroke volum . they were studi as function ( i ) of right ventricular capacit and neg intrathorac pressur ; ( ii ) of left ventricular relax and of heart rate ; and ( iii ) of left ventricl failur . it seem that a satisfactori simul of systol and diastol function of the heart is possibl . present simul improv our understand of the role of the capacit of both ventricl and of the diastol relax in cardiovascular physiolog

simulation
cardiovascular physiology
diastolic function
heart
equivalent electronic circuit
cardiac output
stroke volume
right ventricular capacitance
negative intrathoracic pressure
left ventricular relaxation
heart rate
left ventricle failure
diastolic relaxation
systolic functions


A comparison of high-power converter topologies for the implementation of FACTS controllers

Abstract: This paper compares four power converter topologies for the implementation of flexible AC transmission system (FACTS) controllers: three multilevel topologies (multipoint clamped (MPC), chain, and nested cell) and the well-established multipulse topology. In keeping with the need to implement very-high-power inverters, switching frequency is restricted to line frequency. The study addresses device count, DC filter ratings, restrictions on voltage control, active power transfer through the DC link, and balancing of DC-link voltages. Emphasis is placed on capacitor sizing because of its impact on the cost and size of the FACTS controller. A method for the dimensioning the DC capacitor filter is presented. It is found that the chain converter is attractive for the implementation of a static compensator or a static synchronous series compensator. The MPC converter is attractive for the implementation of a unified power flow controller or an interline power flow controller, but a special arrangement is required to overcome the limitations on voltage control

a comparison of high-pow convert topolog for the implement of fact control
 thi paper compar four power convert topolog for the implement of flexibl ac transmiss system ( fact ) control : three multilevel topolog ( multipoint clamp ( mpc ) , chain , and nest cell ) and the well-establish multipuls topolog . in keep with the need to implement very-high-pow invert , switch frequenc is restrict to line frequenc . the studi address devic count , dc filter rate , restrict on voltag control , activ power transfer through the dc link , and balanc of dc-link voltag . emphasi is place on capacitor size becaus of it impact on the cost and size of the fact control . a method for the dimens the dc capacitor filter is present . it is found that the chain convert is attract for the implement of a static compens or a static synchron seri compens . the mpc convert is attract for the implement of a unifi power flow control or an interlin power flow control , but a special arrang is requir to overcom the limit on voltag control

high-power converter topologies comparison


Work sequencing in a manufacturing cell with limited labour constraints

Abstract: This study focuses on the analysis of group scheduling heuristics in a dual-constrained, automated manufacturing cell, where labour utilization is limited to setups, tear-downs and loads/unloads. This scenario is realistic in today's automated manufacturing cells. The results indicate that policies for allocating labour to tasks have very little impact in such an environment. Furthermore, the performance of efficiency oriented, exhaustive, group scheduling heuristics deteriorated while the performance of the more complex, non-exhaustive heuristics improved. Thus, it is recommended that production managers use the simplest labour scheduling policy, and instead focus their efforts to activities such as job scheduling and production planning in such environments

work sequenc in a manufactur cell with limit labour constraint
 thi studi focus on the analysi of group schedul heurist in a dual-constrain , autom manufactur cell , where labour util is limit to setup , tear-down and load / unload . thi scenario is realist in today 's autom manufactur cell . the result indic that polici for alloc labour to task have veri littl impact in such an environ . furthermor , the perform of effici orient , exhaust , group schedul heurist deterior while the perform of the more complex , non-exhaust heurist improv . thu , it is recommend that product manag use the simplest labour schedul polici , and instead focu their effort to activ such as job schedul and product plan in such environ

dual-constrained automated manufacturing cell

efficiency oriented exhaustive group scheduling heuristics


Stability in the numerical solution of the heat equation with nonlocal boundary conditions

Abstract: This paper deals with numerical methods for the solution of the heat equation with integral boundary conditions. Finite differences are used for the discretization in space. The matrices specifying the resulting semidiscrete problem are proved to satisfy a sectorial resolvent condition, uniformly with respect to the discretization parameter. Using this resolvent condition, unconditional stability is proved for the fully discrete numerical process generated by applying A( theta )-stable one-step methods to the semidiscrete problem. This stability result is established in the maximum norm; it improves some previous results in the literature in that it is not subject to various unnatural restrictions which were imposed on the boundary conditions and on the one-step methods

stabil in the numer solut of the heat equat with nonloc boundari condit
 thi paper deal with numer method for the solut of the heat equat with integr boundari condit . finit differ are use for the discret in space . the matric specifi the result semidiscret problem are prove to satisfi a sectori resolv condit , uniformli with respect to the discret paramet . use thi resolv condit , uncondit stabil is prove for the fulli discret numer process gener by appli a ( theta ) -stabl one-step method to the semidiscret problem . thi stabil result is establish in the maximum norm ; it improv some previou result in the literatur in that it is not subject to variou unnatur restrict which were impos on the boundari condit and on the one-step method

stability
numerical solution
heat equation
nonlocal boundary conditions
integral boundary conditions
finite differences
matrices
semidiscrete problem
sectorial resolvent condition
fully discrete numerical process
one-step methods
maximum norm
space discretization


Santera targets independents in major strategy overhaul [telecom]

Abstract: With big carriers slashing capital expense budgets, Santera Systems is broadening the reach of its next-generation switching platform to include independent telcos. This week, the vendor will announce that it has signed a deal with Kerman, Calif-based Kerman Telephone Co. Furthermore, the company is angling for inclusion in the Rural Utilities Service's approved equipment list, hoping to sell its Class 5 replacement boxes to the smallest carriers. The move is almost a complete reversal for the Plano, Texas-based vendor, which previously focused solely on large carriers, including the RBOCs

santera target independ in major strategi overhaul [ telecom ]
 with big carrier slash capit expens budget , santera system is broaden the reach of it next-gener switch platform to includ independ telco . thi week , the vendor will announc that it ha sign a deal with kerman , calif-bas kerman telephon co. furthermor , the compani is angl for inclus in the rural util servic 's approv equip list , hope to sell it class 5 replac box to the smallest carrier . the move is almost a complet revers for the plano , texas-bas vendor , which previous focus sole on larg carrier , includ the rboc

Santera Systems
switching
Kerman Telephone
Rural Utilities Service


Establishing the discipline of physics-based CMP modeling

Abstract: For the past decade, a physically based comprehensive process model for chemical mechanical polishing has eluded the semiconductor industry. However, a long-term collaborative effort has now resulted in a workable version of that approach. The highly fundamental model is based on advanced finite element analysis and is beginning to show promise in CMP process development

establish the disciplin of physics-bas cmp model
 for the past decad , a physic base comprehens process model for chemic mechan polish ha elud the semiconductor industri . howev , a long-term collabor effort ha now result in a workabl version of that approach . the highli fundament model is base on advanc finit element analysi and is begin to show promis in cmp process develop

CMP
chemical mechanical polishing
finite element analysis
CMP process development
physically based process model


Eliminating recency with self-review: the case of auditors' 'going concern' judgments

Abstract: This paper examines the use of self-review to debias recency. Recency is found in the 'going concern' judgments of staff auditors, but is successfully eliminated by the auditor's use of a simple self-review technique that would be extremely easy to implement in audit practice. Auditors who self-review are also less inclined to make audit report choices that are inconsistent with their going concern judgments. These results are important because the judgments of staff auditors often determine the type and extent of documentation in audit workpapers and serve as preliminary inputs for senior auditors' judgments and choices. If staff auditors' judgments are affected by recency, the impact of this bias may be impounded in the ultimate judgments and choices of senior auditors. Since biased judgments can expose auditors to significant costs involving extended audit procedures, legal liability and diminished reputation, simple debiasing techniques that reduce this exposure are valuable. The paper also explores some future research needs and other important issues concerning judgment debiasing in applied professional settings

elimin recenc with self-review : the case of auditor ' ' go concern ' judgment
 thi paper examin the use of self-review to debia recenc . recenc is found in the ' go concern ' judgment of staff auditor , but is success elimin by the auditor 's use of a simpl self-review techniqu that would be extrem easi to implement in audit practic . auditor who self-review are also less inclin to make audit report choic that are inconsist with their go concern judgment . these result are import becaus the judgment of staff auditor often determin the type and extent of document in audit workpap and serv as preliminari input for senior auditor ' judgment and choic . if staff auditor ' judgment are affect by recenc , the impact of thi bia may be impound in the ultim judgment and choic of senior auditor . sinc bias judgment can expos auditor to signific cost involv extend audit procedur , legal liabil and diminish reput , simpl debias techniqu that reduc thi exposur are valuabl . the paper also explor some futur research need and other import issu concern judgment debias in appli profession set

self-review
staff auditors
audit report choices
documentation
audit workpapers
senior auditors
extended audit procedures
legal liability
diminished reputation
judgment debiasing
applied professional settings
auditor going concern judgments
recency debiasing
accountability
probability judgments


A scalable intelligent takeoff controller for a simulated running jointed leg

Abstract: Running with jointed legs poses a difficult control problem in robotics. Neural controllers are attractive because they allow the robot to adapt to changing environmental conditions. However, scalability is an issue with many neural controllers. The paper describes the development of a scalable neurofuzzy controller for the takeoff phase of the running stride. Scalability is achieved by selecting a controller whose size does not grow with the dimensionality of the problem. Empirical results show that with proper design the takeoff controller scales from a leg with a single movable link to one with three movable links without a corresponding growth in size and without a loss of accuracy

a scalabl intellig takeoff control for a simul run joint leg
 run with joint leg pose a difficult control problem in robot . neural control are attract becaus they allow the robot to adapt to chang environment condit . howev , scalabl is an issu with mani neural control . the paper describ the develop of a scalabl neurofuzzi control for the takeoff phase of the run stride . scalabl is achiev by select a control whose size doe not grow with the dimension of the problem . empir result show that with proper design the takeoff control scale from a leg with a singl movabl link to one with three movabl link without a correspond growth in size and without a loss of accuraci

scalable intelligent takeoff controller
scalability
simulated running jointed leg
neural controllers
changing environmental conditions
scalable neurofuzzy controller
takeoff phase
running stride
intelligent robotic control


Perceptual audio coding using adaptive pre- and post-filters and lossless compression

Abstract: This paper proposes a versatile perceptual audio coding method that achieves high compression ratios and is capable of low encoding/decoding delay. It accommodates a variety of source signals (including both music and speech) with different sampling rates. It is based on separating irrelevance and redundancy reductions into independent functional units. This contrasts traditional audio coding where both are integrated within the same subband decomposition. The separation allows for the independent optimization of the irrelevance and redundancy reduction units. For both reductions, we rely on adaptive filtering and predictive coding as much as possible to minimize the delay. A psycho-acoustically controlled adaptive linear filter is used for the irrelevance reduction, and the redundancy reduction is carried out by a predictive lossless coding scheme, which is termed weighted cascaded least mean squared (WCLMS) method. Experiments are carried out on a database of moderate size which contains mono-signals of different sampling rates and varying nature (music, speech, or mixed). They show that the proposed WCLMS lossless coder outperforms other competing lossless coders in terms of compression ratios and delay, as applied to the pre-filtered signal. Moreover, a subjective listening test of the combined pre-filter/lossless coder and a state-of-the-art perceptual audio coder (PAC) shows that the new method achieves a comparable compression ratio and audio quality with a lower delay

perceptu audio code use adapt pre- and post-filt and lossless compress
 thi paper propos a versatil perceptu audio code method that achiev high compress ratio and is capabl of low encod / decod delay . it accommod a varieti of sourc signal ( includ both music and speech ) with differ sampl rate . it is base on separ irrelev and redund reduct into independ function unit . thi contrast tradit audio code where both are integr within the same subband decomposit . the separ allow for the independ optim of the irrelev and redund reduct unit . for both reduct , we reli on adapt filter and predict code as much as possibl to minim the delay . a psycho-acoust control adapt linear filter is use for the irrelev reduct , and the redund reduct is carri out by a predict lossless code scheme , which is term weight cascad least mean squar ( wclm ) method . experi are carri out on a databas of moder size which contain mono-sign of differ sampl rate and vari natur ( music , speech , or mix ) . they show that the propos wclm lossless coder outperform other compet lossless coder in term of compress ratio and delay , as appli to the pre-filt signal . moreov , a subject listen test of the combin pre-filt / lossless coder and a state-of-the-art perceptu audio coder ( pac ) show that the new method achiev a compar compress ratio and audio qualiti with a lower delay


A unified view for vector rotational CORDIC algorithms and architectures based on angle quantization approach

Abstract: Vector rotation is the key operation employed extensively in many digital signal processing applications. In this paper, we introduce a new design concept called Angle Quantization (AQ). It can be used as a design index for vector rotational operation, where the rotational angle is known in advance. Based on the AQ process, we establish a unified design framework for cost-effective low-latency rotational algorithms and architectures. Several existing works, such as conventional COordinate Rotational Digital Computer (CORDIC), AR-CORDIC, MVR-CORDIC, and EEAS-based CORDIC, can be fitted into the design framework, forming a Vector Rotational CORDIC Family. Moreover, we address four searching algorithms to solve the optimization problem encountered in the proposed vector rotational CORDIC family. The corresponding scaling operations of the CORDIC family are also discussed. Based on the new design framework, we can realize high-speed/low-complexity rotational VLSI circuits, whereas without degrading the precision performance in fixed-point implementations

a unifi view for vector rotat cordic algorithm and architectur base on angl quantiz approach
 vector rotat is the key oper employ extens in mani digit signal process applic . in thi paper , we introduc a new design concept call angl quantiz ( aq ) . it can be use as a design index for vector rotat oper , where the rotat angl is known in advanc . base on the aq process , we establish a unifi design framework for cost-effect low-lat rotat algorithm and architectur . sever exist work , such as convent coordin rotat digit comput ( cordic ) , ar-cord , mvr-cordic , and eeas-bas cordic , can be fit into the design framework , form a vector rotat cordic famili . moreov , we address four search algorithm to solv the optim problem encount in the propos vector rotat cordic famili . the correspond scale oper of the cordic famili are also discuss . base on the new design framework , we can realiz high-spe / low-complex rotat vlsi circuit , wherea without degrad the precis perform in fixed-point implement

vector rotational CORDIC algorithms
angle quantization
digital signal processing applications
design index
vector rotational operation
unified design framework
low-latency rotational algorithms
searching algorithms
optimization problem
scaling operations
low-complexity rotational VLSI circuits
fixed-point implementations
DSP applications
greedy searching algorithm
low-latency rotational architectures
high-speed rotational VLSI circuits
trellis-based searching algorithm


Homogenization in L/sup infinity /

Abstract: Homogenization of deterministic control problems with L/sup infinity / running cost is studied by viscosity solutions techniques. It is proved that the value function of an L/sup infinity / problem in a medium with a periodic micro-structure converges uniformly on the compact sets to the value function of the homogenized problem as the period shrinks to 0. Our main convergence result extends that of Ishii (Stochastic Analysis, control, optimization and applications, pp. 305-324, Birkhauser Boston, Boston, MA, 1999.) to the case of a discontinuous Hamiltonian. The cell problem is solved, but, as nonuniqueness occurs, the effective Hamiltonian must be selected in a careful way. The paper also provides a representation formula for the effective Hamiltonian and gives illustrations to calculus of variations, averaging and one-dimensional problems

homogen in l / sup infin /
 homogen of determinist control problem with l / sup infin / run cost is studi by viscos solut techniqu . it is prove that the valu function of an l / sup infin / problem in a medium with a period micro-structur converg uniformli on the compact set to the valu function of the homogen problem as the period shrink to 0 . our main converg result extend that of ishii ( stochast analysi , control , optim and applic , pp . 305 - 324 , birkhaus boston , boston , ma , 1999 . ) to the case of a discontinu hamiltonian . the cell problem is solv , but , as nonuniqu occur , the effect hamiltonian must be select in a care way . the paper also provid a represent formula for the effect hamiltonian and give illustr to calculu of variat , averag and one-dimension problem

homogenization
deterministic control
L/sup infinity / running cost
value function
convergence
cell problem
calculus of variations
averaging
optimal control


Induced-shear piezoelectric actuators for rotor blade trailing edge flaps

Abstract: Much of the current rotorcraft research is focused on improving performance by reducing unwanted helicopter noise and vibration. One of the most promising active rotorcraft vibration control systems is an active trailing edge flap. In this paper, an induced-shear piezoelectric tube actuator is used in conjunction with a simple lever-cusp hinge amplification device to generate a useful combination of trailing edge flap deflections and hinge moments. A finite-element model of the actuator tube and trailing edge flap (including aerodynamic and inertial loading) was used to guide the design of the actuator-flap system. A full-scale induced shear tube actuator flap system was fabricated and bench top testing was conducted to validate the analysis. Hinge moments corresponding to various rotor speeds were applied to the actuator using mechanical springs. The testing demonstrated that for an applied electric field of 3 kV cm/sup -1/ the tube actuator deflected a representative full-scale 12 inch flap +or-2.8 degrees at 0 rpm and +or-1.4 degrees for a hinge moment simulating a 400 rpm condition. The per cent error between the predicted and experimental full-scale flap deflections ranged from 4% (low rpm) to 12.5% (large rpm). Increasing the electric field to 4 kV cm/sup -1/ results in +or-2.5 degrees flap deflection at a rotation speed of 400 rpm, according to the design analysis. A trade study was conducted to compare the performance of the piezoelectric tube actuator to the state of the art in trailing edge flap actuators and indicated that the induced-shear tube actuator shows promise as a trailing edge flap actuator

induced-shear piezoelectr actuat for rotor blade trail edg flap
 much of the current rotorcraft research is focus on improv perform by reduc unwant helicopt nois and vibrat . one of the most promis activ rotorcraft vibrat control system is an activ trail edg flap . in thi paper , an induced-shear piezoelectr tube actuat is use in conjunct with a simpl lever-cusp hing amplif devic to gener a use combin of trail edg flap deflect and hing moment . a finite-el model of the actuat tube and trail edg flap ( includ aerodynam and inerti load ) wa use to guid the design of the actuator-flap system . a full-scal induc shear tube actuat flap system wa fabric and bench top test wa conduct to valid the analysi . hing moment correspond to variou rotor speed were appli to the actuat use mechan spring . the test demonstr that for an appli electr field of 3 kv cm / sup -1/ the tube actuat deflect a repres full-scal 12 inch flap + or-2.8 degre at 0 rpm and + or-1.4 degre for a hing moment simul a 400 rpm condit . the per cent error between the predict and experiment full-scal flap deflect rang from 4 % ( low rpm ) to 12.5 % ( larg rpm ) . increas the electr field to 4 kv cm / sup -1/ result in + or-2.5 degre flap deflect at a rotat speed of 400 rpm , accord to the design analysi . a trade studi wa conduct to compar the perform of the piezoelectr tube actuat to the state of the art in trail edg flap actuat and indic that the induced-shear tube actuat show promis as a trail edg flap actuat

rotorcraft
helicopter noise
vibration control
active trailing edge flap
piezoelectric tube actuator
lever-cusp hinge amplification device
finite-element model
inertial loading
design
shear tube actuator flap
bench top testing
12 inch flap
12 inch
induced-shear tube actuator
helicopter vibration
aerodynamic loading


Techniques for compiling and implementing all NAS parallel benchmarks in HPF

Abstract: The NAS parallel benchmarks (NPB) are a well-known benchmark set for high-performance machines. Much effort has been made to implement them in High-Performance Fortran (HPF). In previous attempts, however, the HPF versions did not include the complete set of benchmarks, and the performance was not always good. In this study, we implement all eight benchmarks of the NPB in HPF, and parallelize them using an HPF compiler that we have developed. This report describes the implementation techniques and compiler features necessary to achieve good performance. We evaluate the HPF version on the Hitachi SR2201, a distributed-memory parallel machine. With 16 processors, the execution time of the HPF version is within a factor of 1.5 of the hand-parallelized version of the NPB 2.3 beta

techniqu for compil and implement all na parallel benchmark in hpf
 the na parallel benchmark ( npb ) are a well-known benchmark set for high-perform machin . much effort ha been made to implement them in high-perform fortran ( hpf ) . in previou attempt , howev , the hpf version did not includ the complet set of benchmark , and the perform wa not alway good . in thi studi , we implement all eight benchmark of the npb in hpf , and parallel them use an hpf compil that we have develop . thi report describ the implement techniqu and compil featur necessari to achiev good perform . we evalu the hpf version on the hitachi sr2201 , a distributed-memori parallel machin . with 16 processor , the execut time of the hpf version is within a factor of 1.5 of the hand-parallel version of the npb 2.3 beta


Dynamic modification of object Petri nets. An application to modelling protocols with fork-join structures

Abstract: In this paper we discuss possibilities of modelling protocols by objects in object-based high-level Petri nets. Some advantages of dynamically modifying the structure of token objects are discussed and the need for further investigations into mathematically rigorous foundations of object net formalisms incorporating facilities for such operations on its token nets is emphasised

dynam modif of object petri net . an applic to model protocol with fork-join structur
 in thi paper we discuss possibl of model protocol by object in object-bas high-level petri net . some advantag of dynam modifi the structur of token object are discuss and the need for further investig into mathemat rigor foundat of object net formal incorpor facil for such oper on it token net is emphasis

dynamic modification
object Petri nets
protocols
fork-join structures
token objects
mathematically rigorous foundations
object net formalisms


Source/channel coding of still images using lapped transforms and block classification

Abstract: A novel scheme for joint source/channel coding of still images is proposed. By using efficient lapped transforms, channel-optimised robust quantisers and classification methods it is shown that significant improvements over traditional source/channel coding of images can be obtained while keeping the complexity low

sourc / channel code of still imag use lap transform and block classif
 a novel scheme for joint sourc / channel code of still imag is propos . by use effici lap transform , channel-optimis robust quantis and classif method it is shown that signific improv over tradit sourc / channel code of imag can be obtain while keep the complex low

still images
lapped transforms
block classification
channel-optimised robust quantisers
joint source-channel coding
image coding
low complexity


Influence of the process design on the control strategy: application in electropneumatic field

Abstract: This article proposes an example of electropneumatic system where the architecture of the process is modified with respect to both the specifications for position and velocity tracking and a criterion concerning the energy consumption. Experimental results are compared and analyzed using an industrial bench test. For this, a complete model of the system is presented, and two kinds of nonlinear control laws are developed, a monovariable and multivariable type based on the flatness theory

influenc of the process design on the control strategi : applic in electropneumat field
 thi articl propos an exampl of electropneumat system where the architectur of the process is modifi with respect to both the specif for posit and veloc track and a criterion concern the energi consumpt . experiment result are compar and analyz use an industri bench test . for thi , a complet model of the system is present , and two kind of nonlinear control law are develop , a monovari and multivari type base on the flat theori

electropneumatic systems
tracking
energy consumption
nonlinear control
flatness theory
positioning systems
position control
monovariable control
multivariable control
velocity control


An analytic center cutting plane method for semidefinite feasibility problems

Abstract: Semidefinite feasibility problems arise in many areas of operations research. The abstract form of these problems can be described as finding a point in a nonempty bounded convex body Gamma in the cone of symmetric positive semidefinite matrices. Assume that Gamma is defined by an oracle, which for any given m * m symmetric positive semidefinite matrix Gamma either confirms that Y epsilon Gamma or returns a cut, i.e., a symmetric matrix A such that Gamma is in the half-space {Y : A . Y <or= A . Y}. We study an analytic center cutting plane algorithm for this problem. At each iteration, the algorithm computes an approximate analytic center of a working set defined by the cutting plane system generated in the previous iterations. If this approximate analytic center is a solution, then the algorithm terminates; otherwise the new cutting plane returned by the oracle is added into the system. As the number of iterations increases, the working set shrinks and the algorithm eventually finds a solution to the problem. All iterates generated by the algorithm are positive definite matrices. The algorithm has a worst-case complexity of O*(m/sup 3// epsilon /sup 2/) on the total number of cuts to be used, where epsilon is the maximum radius of a ball contained by Gamma

an analyt center cut plane method for semidefinit feasibl problem
 semidefinit feasibl problem aris in mani area of oper research . the abstract form of these problem can be describ as find a point in a nonempti bound convex bodi gamma in the cone of symmetr posit semidefinit matric . assum that gamma is defin by an oracl , which for ani given m * m symmetr posit semidefinit matrix gamma either confirm that y epsilon gamma or return a cut , i.e. , a symmetr matrix a such that gamma is in the half-spac { y : a . y < or= a . y } . we studi an analyt center cut plane algorithm for thi problem . at each iter , the algorithm comput an approxim analyt center of a work set defin by the cut plane system gener in the previou iter . if thi approxim analyt center is a solut , then the algorithm termin ; otherwis the new cut plane return by the oracl is ad into the system . as the number of iter increas , the work set shrink and the algorithm eventu find a solut to the problem . all iter gener by the algorithm are posit definit matric . the algorithm ha a worst-cas complex of o*(m / sup 3// epsilon /sup 2/ ) on the total number of cut to be use , where epsilon is the maximum radiu of a ball contain by gamma


A summary of methods applied to tool condition monitoring in drilling

Abstract: Presents a summary of the monitoring methods, signal analysis and diagnostic techniques for tool wear and failure monitoring in drilling that have been tested and reported in the literature. The paper covers only indirect monitoring methods such as force, vibration and current measurements. Signal analysis techniques cover all the methods that have been used with indirect measurements including e.g. statistical parameters and Fast Fourier and Wavelet Transform. Only a limited number of automatic diagnostic tools have been developed for diagnosis of the condition of the tool in drilling. All of these rather diverse approaches that have been available are covered in this study. Only in a few of the papers have attempts been made to compare the chosen approach with other methods. Many of the papers only present one approach and unfortunately quite often the test material of the study is limited especially in what comes to the cutting process parameter variation and also workpiece material

a summari of method appli to tool condit monitor in drill
 present a summari of the monitor method , signal analysi and diagnost techniqu for tool wear and failur monitor in drill that have been test and report in the literatur . the paper cover onli indirect monitor method such as forc , vibrat and current measur . signal analysi techniqu cover all the method that have been use with indirect measur includ e.g. statist paramet and fast fourier and wavelet transform . onli a limit number of automat diagnost tool have been develop for diagnosi of the condit of the tool in drill . all of these rather divers approach that have been avail are cover in thi studi . onli in a few of the paper have attempt been made to compar the chosen approach with other method . mani of the paper onli present one approach and unfortun quit often the test materi of the studi is limit especi in what come to the cut process paramet variat and also workpiec materi

tool condition monitoring
drilling
monitoring methods
signal analysis
diagnostic techniques
tool wear
failure monitoring
indirect monitoring methods
current measurements
statistical parameters
wavelet transform
automatic diagnostic tools
force measurements
vibration measurements
fast Fourier transform


Sensing and control of double-sided arc welding process

Abstract: The welding industry is driven to improve productivity without sacrificing quality. For thick material welding, the current practice is to use backing or multiple passes. The laser welding process, capable of achieving deep narrow penetration, can significantly improve welding productivity for such applications by reducing the number of passes. However, its competitiveness in comparison with traditional arc welding is weakened by its high cost, strict fit-up requirement, and difficulty in welding large structures. In this work, a different method, referred to as double-sided arc welding (DSAW) is developed to improve the arc concentration for arc welding. A sensing and control system is developed to achieve deep narrow penetration under variations in welding conditions. Experiments verified that the pulsed keyhole DSAW system developed is capable of achieving deep narrow penetration on a 1/2 inch thick square butt joint in a single pass

sens and control of double-sid arc weld process
 the weld industri is driven to improv product without sacrif qualiti . for thick materi weld , the current practic is to use back or multipl pass . the laser weld process , capabl of achiev deep narrow penetr , can significantli improv weld product for such applic by reduc the number of pass . howev , it competit in comparison with tradit arc weld is weaken by it high cost , strict fit-up requir , and difficulti in weld larg structur . in thi work , a differ method , refer to as double-sid arc weld ( dsaw ) is develop to improv the arc concentr for arc weld . a sens and control system is develop to achiev deep narrow penetr under variat in weld condit . experi verifi that the puls keyhol dsaw system develop is capabl of achiev deep narrow penetr on a 1/2 inch thick squar butt joint in a singl pass

double-sided arc welding
thick material welding
laser welding process
control system
process control
energy density
controlled pulse keyhole


SBC gets more serious on regulatory compliance

Abstract: With one eye on the past and the other on its future, SBC Communications last week created a unit it hopes will bring a cohesiveness and efficiency to its regulatory compliance efforts that previously had been lacking. The carrier also hopes the new regulatory compliance unit will help it accomplish its short-term goal of landing FCC approval. to provide long-distance service throughout its region, and its longer-term, goal of reducing the regulatory burdens under which it and currently operate

sbc get more seriou on regulatori complianc
 with one eye on the past and the other on it futur , sbc commun last week creat a unit it hope will bring a cohes and effici to it regulatori complianc effort that previous had been lack . the carrier also hope the new regulatori complianc unit will help it accomplish it short-term goal of land fcc approv . to provid long-dist servic throughout it region , and it longer-term , goal of reduc the regulatori burden under which it and current oper

regulatory compliance
SBC Communications
telecom carrier


Computer program for calculating the p-value in testing process capability index C/sub pmk/

Abstract: Many process capability indices, including C/sub p/, C/sub pk/, and C/sub pm/, have been proposed to provide numerical measures on the process potential and performance. Combining the advantages of these indices, Pearn et al. (1992) introduced a new capability index called C/sub pmk/, which has been shown to be a useful capability index for processes with two-sided specification limits. In this paper, the authors implement the theory of a testing hypothesis using the natural estimator of C/sub pmk/, and provide an efficient Maple computer program to calculate the p-values. They also provide tables of the critical values for some commonly used capability requirements. Based on the test, they develop a simple step-by-step procedure for in-plant applications. The practitioners can use the proposed procedure to determine whether their process meets the preset capability requirement, and make reliable decisions

comput program for calcul the p-valu in test process capabl index c / sub pmk/
 mani process capabl indic , includ c / sub p/ , c / sub pk/ , and c / sub pm/ , have been propos to provid numer measur on the process potenti and perform . combin the advantag of these indic , pearn et al . ( 1992 ) introduc a new capabl index call c / sub pmk/ , which ha been shown to be a use capabl index for process with two-sid specif limit . in thi paper , the author implement the theori of a test hypothesi use the natur estim of c / sub pmk/ , and provid an effici mapl comput program to calcul the p-valu . they also provid tabl of the critic valu for some commonli use capabl requir . base on the test , they develop a simpl step-by-step procedur for in-plant applic . the practition can use the propos procedur to determin whether their process meet the preset capabl requir , and make reliabl decis

computer program
testing process capability index
process potential
testing hypothesis
natural estimator
Maple
in-plant applications
preset capability requirement
reliable decisions
process performance
p-value calculation


New kit on the block [IT upgrades]

Abstract: As time passes, new hardware and software replace the old. The hows are straightforward: IT resellers and consultants can help with upgrade practicalities. Will Dalrymple examines the business issues and costs involved in IT upgrades

new kit on the block [ it upgrad ]
 as time pass , new hardwar and softwar replac the old . the how s are straightforward : it resel and consult can help with upgrad practic . will dalrympl examin the busi issu and cost involv in it upgrad

IT upgrades
IT resellers
consultants
business issues
costs
Microsoft


Evaluating alternative manufacturing control strategies using a benchmark system

Abstract: This paper describes an investigation of the effects of dynamic job routing and job sequencing decisions on the performance of a distributed control system and its adaptability against disturbances. This experimental work was carried out to compare the performance of alternative control strategies in various manufacturing environments and to investigate the relationship between the 'control' and 'controlled' systems. The experimental test-bed presented in this paper consists of an agent-based control system (implemented in C++) and a discrete-event simulation model. Using this test-bed, various control strategies were tested on a benchmark manufacturing system by varying production volumes (to model the production system with looser/tighter schedules) and disturbance frequencies. It was found that hybrid strategies that combine reactive agent mechanisms (and allocation strategies such as the contract net) with appropriate job sequencing heuristics provide the best performance, particularly when job congestion increases on a shop-floor

evalu altern manufactur control strategi use a benchmark system
 thi paper describ an investig of the effect of dynam job rout and job sequenc decis on the perform of a distribut control system and it adapt against disturb . thi experiment work wa carri out to compar the perform of altern control strategi in variou manufactur environ and to investig the relationship between the ' control ' and ' control ' system . the experiment test-b present in thi paper consist of an agent-bas control system ( implement in c++ ) and a discrete-ev simul model . use thi test-b , variou control strategi were test on a benchmark manufactur system by vari product volum ( to model the product system with looser / tighter schedul ) and disturb frequenc . it wa found that hybrid strategi that combin reactiv agent mechan ( and alloc strategi such as the contract net ) with appropri job sequenc heurist provid the best perform , particularli when job congest increas on a shop-floor


International swinging: making Swing components locale-sensitive

Abstract: Although Java and its GUI library Swing provide software developers with a highly customizable framework for creating truly "international" applications, the Swing library is not sensitive to locale switches: it cannot automatically change an application's appearance to conform to the conventions of a specific locale at run time. Several types of applications benefit from the ability to easily switch the language at run time. Training applications and other programs that run on computers in public spaces (such as libraries, airports, or government offices) may need to support multiple languages. Other applications (like travel dictionaries or translation programs) are inherently multilingual and are specifically designed to support users of dissimilar tongues. Such applications would greatly benefit if the user-interface language could be customized at run time. The article shows you how to customize Swing to support locale switching at run time. The author has created a new look-and-feel called the MLMetalLookandFeel (where ML stands for multilingual). This new look-and-feel extends the standard Metal look-and-feel but is locale-sensitive at run time

intern swing : make swing compon locale-sensit
 although java and it gui librari swing provid softwar develop with a highli customiz framework for creat truli " intern " applic , the swing librari is not sensit to local switch : it can not automat chang an applic 's appear to conform to the convent of a specif local at run time . sever type of applic benefit from the abil to easili switch the languag at run time . train applic and other program that run on comput in public space ( such as librari , airport , or govern offic ) may need to support multipl languag . other applic ( like travel dictionari or translat program ) are inher multilingu and are specif design to support user of dissimilar tongu . such applic would greatli benefit if the user-interfac languag could be custom at run time . the articl show you how to custom swing to support local switch at run time . the author ha creat a new look-and-feel call the mlmetallookandfeel ( where ml stand for multilingu ) . thi new look-and-feel extend the standard metal look-and-feel but is locale-sensit at run time

Java
GUI library
Swing library
locale switching
travel dictionaries
translation programs
user-interface language
MLMetalLookandFeel


Web talk is cheap

Abstract: Web technology provides a wealth of opportunities for reaching potential customers. So how do you make it work for your business?

web talk is cheap
 web technolog provid a wealth of opportun for reach potenti custom . so how do you make it work for your busi ?

website
web chat
collaborative browsing
customer service representative
call centre


A framework for image deblurring using wavelet packet bases

Abstract: We show that the average over translations of an operator diagonal in a wavelet packet basis is a convolution. We also show that an operator diagonal in a wavelet packet basis can be decomposed into several operators of the same kind, each of them being better conditioned. We investigate the possibility of using such a convolution to approximate a given convolution (in practice an image blur). Then we use these approximations to deblur images. First, we show that this framework permits us to redefine existing deblurring methods. Then, we show that it permits us to define a new variational method which combines the wavelet packet and the total variation approaches. We argue and show by experiments that this permits us to avoid the drawbacks of both approaches which are, respectively, ringing and staircasing

a framework for imag deblur use wavelet packet base
 we show that the averag over translat of an oper diagon in a wavelet packet basi is a convolut . we also show that an oper diagon in a wavelet packet basi can be decompos into sever oper of the same kind , each of them be better condit . we investig the possibl of use such a convolut to approxim a given convolut ( in practic an imag blur ) . then we use these approxim to deblur imag . first , we show that thi framework permit us to redefin exist deblur method . then , we show that it permit us to defin a new variat method which combin the wavelet packet and the total variat approach . we argu and show by experi that thi permit us to avoid the drawback of both approach which are , respect , ring and staircas

image deblurring
wavelet packet bases
operator diagonal
convolution
total variation approach
ringing
staircasing
deconvolution


Unlocking the clubhouse: the Carnegie Mellon experience

Abstract: In the fall of 1995, just seven of 95 students entering the undergraduate program in computer science at Carnegie Mellon University were women. In 2000, 54 of 130, or 42%, were women. What happened? This article presents a brief history of the transformation at Carnegie Mellon's School of Computer Science, and the research project that lay behind it

unlock the clubhous : the carnegi mellon experi
 in the fall of 1995 , just seven of 95 student enter the undergradu program in comput scienc at carnegi mellon univers were women . in 2000 , 54 of 130 , or 42 % , were women . what happen ? thi articl present a brief histori of the transform at carnegi mellon 's school of comput scienc , and the research project that lay behind it

students
undergraduate program
Carnegie Mellon University
women
history
research project
computer science education
gender issues


Efficient cellular automata based versatile multiplier for GF(2/sup m/)

Abstract: In this paper, a low-complexity programmable cellular automata (PCA) based versatile modular multiplier in GF(2/sup m/) is presented. The proposed versatile multiplier increases flexibility by using the same multiplier in different security environments, and it reduces the user's cost. Moreover, the multiplier can be easily extended to high order of m for more security, and low-cost serial implementation is feasible in restricted computing environments, such as smart cards and wireless devices

effici cellular automata base versatil multipli for gf(2 / sup m/ )
 in thi paper , a low-complex programm cellular automata ( pca ) base versatil modular multipli in gf(2 / sup m/ ) is present . the propos versatil multipli increas flexibl by use the same multipli in differ secur environ , and it reduc the user 's cost . moreov , the multipli can be easili extend to high order of m for more secur , and low-cost serial implement is feasibl in restrict comput environ , such as smart card and wireless devic


An attack-finding algorithm for security protocols

Abstract: This paper proposes an automatic attack construction algorithm in order to find potential attacks on security protocols. It is based on a dynamic strand space model, which enhances the original strand space model by introducing active nodes on strands so as to characterize the dynamic procedure of protocol execution. With exact causal dependency relations between messages considered in the model, this algorithm can avoid state space explosion caused by asynchronous composition. In order to get a finite state space, a new method called strand-added on demand is exploited, which extends a bundle in an incremental manner without requiring explicit configuration of protocol execution parameters. A finer granularity model of term structure is also introduced, in which subterms are divided into check subterms and data subterms. Moreover, data subterms can be further classified based on the compatible data subterm relation to obtain automatically the finite set of valid acceptable terms for an honest principal. In this algorithm, terms core is designed to represent the intruder's knowledge compactly, and forward search technology is used to simulate attack patterns easily. Using this algorithm, a new attack on the Dolve-Yao protocol can be found, which is even more harmful because the secret is revealed before the session terminates

an attack-find algorithm for secur protocol
 thi paper propos an automat attack construct algorithm in order to find potenti attack on secur protocol . it is base on a dynam strand space model , which enhanc the origin strand space model by introduc activ node on strand so as to character the dynam procedur of protocol execut . with exact causal depend relat between messag consid in the model , thi algorithm can avoid state space explos caus by asynchron composit . in order to get a finit state space , a new method call strand-ad on demand is exploit , which extend a bundl in an increment manner without requir explicit configur of protocol execut paramet . a finer granular model of term structur is also introduc , in which subterm are divid into check subterm and data subterm . moreov , data subterm can be further classifi base on the compat data subterm relat to obtain automat the finit set of valid accept term for an honest princip . in thi algorithm , term core is design to repres the intrud 's knowledg compactli , and forward search technolog is use to simul attack pattern easili . use thi algorithm , a new attack on the dolve-yao protocol can be found , which is even more harm becaus the secret is reveal befor the session termin

attack-finding algorithm
security protocols
dynamic strand space model
strand space model
state space explosion
asynchronous composition
strand-added on demand
check subterms
data subterms
Dolve-Yao protocol


Incorporating multi-leaf collimator leaf sequencing into iterative IMRT optimization

Abstract: Intensity modulated radiation therapy (IMRT) treatment planning typically considers beam optimization and beam delivery as separate tasks. Following optimization, a multi-leaf collimator (MLC) or other beam delivery device is used to generate fluence patterns for patient treatment delivery. Due to limitations and characteristics of the MLC, the deliverable intensity distributions often differ from those produced by the optimizer, leading to differences between the delivered and the optimized doses. Objective function parameters are then adjusted empirically, and the plan is reoptimized to achieve a desired deliverable dose distribution. The resulting plan, though usually acceptable, may not be the best achievable. A method has been developed to incorporate the MLC restrictions into the optimization process. Our in-house IMRT system has been modified to include the calculation of the deliverable intensity into the optimizer. In this process, prior to dose calculation, the MLC leaf sequencer is used to convert intensities to dynamic MLC sequences, from which the deliverable intensities are then determined. All other optimization steps remain the same. To evaluate the effectiveness of deliverable-based optimization, 17 patient cases have been studied. Compared with standard optimization plus conversion to deliverable beams, deliverable-based optimization results show improved isodose coverage and a reduced dose to critical structures. Deliverable-based optimization results are close to the original nondeliverable optimization results, suggesting that IMRT can overcome the MLC limitations by adjusting individual beamlets. The use of deliverable-based optimization may reduce the need for empirical adjustment of objective function parameters and reoptimization of a plan to achieve desired results

incorpor multi-leaf collim leaf sequenc into iter imrt optim
 intens modul radiat therapi ( imrt ) treatment plan typic consid beam optim and beam deliveri as separ task . follow optim , a multi-leaf collim ( mlc ) or other beam deliveri devic is use to gener fluenc pattern for patient treatment deliveri . due to limit and characterist of the mlc , the deliver intens distribut often differ from those produc by the optim , lead to differ between the deliv and the optim dose . object function paramet are then adjust empir , and the plan is reoptim to achiev a desir deliver dose distribut . the result plan , though usual accept , may not be the best achiev . a method ha been develop to incorpor the mlc restrict into the optim process . our in-hous imrt system ha been modifi to includ the calcul of the deliver intens into the optim . in thi process , prior to dose calcul , the mlc leaf sequenc is use to convert intens to dynam mlc sequenc , from which the deliver intens are then determin . all other optim step remain the same . to evalu the effect of deliverable-bas optim , 17 patient case have been studi . compar with standard optim plu convers to deliver beam , deliverable-bas optim result show improv isodos coverag and a reduc dose to critic structur . deliverable-bas optim result are close to the origin nondeliver optim result , suggest that imrt can overcom the mlc limit by adjust individu beamlet . the use of deliverable-bas optim may reduc the need for empir adjust of object function paramet and reoptim of a plan to achiev desir result

intensity modulated radiation therapy
treatment planning
beam optimization
beam delivery
fluence patterns
objective function parameters
deliverable dose distribution
empirical adjustment
iterative optimization
multileaf collimator leaf sequencing
tumor dose
optimized intensity
gradient-based search algorithm
beamlet ray intensities
Newton method
dose-volume objective values


Vehicle travel time models for AGV systems under various dispatching rules

Abstract: The design and evaluation of AGV-based material handling systems are highly complex because of the randomness and the large number of variables involved. Vehicle travel time is a fundamental parameter for solving various flexible manufacturing system (FMS) design problems. This article presents stochastic vehicle travel time models for AGV-based material handling systems with emphasis on the empty travel times of vehicles. Various vehicle dispatching rules examined here include the nearest vehicle selection rule and longest idle vehicle selection rule. A simulation experiment is used to evaluate and demonstrate the presented models

vehicl travel time model for agv system under variou dispatch rule
 the design and evalu of agv-bas materi handl system are highli complex becaus of the random and the larg number of variabl involv . vehicl travel time is a fundament paramet for solv variou flexibl manufactur system ( fm ) design problem . thi articl present stochast vehicl travel time model for agv-bas materi handl system with emphasi on the empti travel time of vehicl . variou vehicl dispatch rule examin here includ the nearest vehicl select rule and longest idl vehicl select rule . a simul experi is use to evalu and demonstr the present model

vehicle travel time
AGV
material handling systems
flexible manufacturing system
FMS
vehicle dispatching rules
nearest vehicle selection rule
longest idle vehicle selection rule
automatic guided vehicle


The treatment of fear of flying: a controlled study of imaginal and virtual reality graded exposure therapy

Abstract: The goal of this study was to determine if virtual reality graded exposure therapy (VRGET) was equally efficacious, more efficacious, or less efficacious, than imaginal exposure therapy in the treatment of fear of flying. Thirty participants (Age=39.8+or-9.7) with confirmed DSM-IV diagnosis of specific phobia fear of flying were randomly assigned to one of three groups: VRGET with no physiological feedback (VRGETno), VRGET with physiological feedback (VRGETpm), or systematic desensitization with imaginal exposure therapy (IET). Eight sessions were conducted once a week. During each session, physiology was measured to give an objective measurement of improvement over the course of exposure therapy. In addition, self-report questionnaires, subjective ratings of anxiety (SUDs), and behavioral observations (included here as flying behavior before beginning treatment and at a three-month posttreatment followup) were included. In the analysis of results, the Chi-square test of behavioral observations based on a three-month posttreatment followup revealed a statistically significant difference in flying behavior between the groups [ chi /sup 2/(4)=19.41, p<0.001]. Only one participant (10%) who received IET, eight of the ten participants (80%) who received VRGETno, and ten out of the ten participants (100%) who received VRGETpm reported an ability to fly without medication or alcohol at three-month followup. Although this study included small sample sizes for the three groups, the results showed VRGET was more effective than IET in the treatment of flying. It also suggests that physiological feedback may add to the efficacy of VR treatment

the treatment of fear of fli : a control studi of imagin and virtual realiti grade exposur therapi
 the goal of thi studi wa to determin if virtual realiti grade exposur therapi ( vrget ) wa equal efficaci , more efficaci , or less efficaci , than imagin exposur therapi in the treatment of fear of fli . thirti particip ( age=39.8+or-9.7 ) with confirm dsm-iv diagnosi of specif phobia fear of fli were randomli assign to one of three group : vrget with no physiolog feedback ( vrgetno ) , vrget with physiolog feedback ( vrgetpm ) , or systemat desensit with imagin exposur therapi ( iet ) . eight session were conduct onc a week . dure each session , physiolog wa measur to give an object measur of improv over the cours of exposur therapi . in addit , self-report questionnair , subject rate of anxieti ( sud ) , and behavior observ ( includ here as fli behavior befor begin treatment and at a three-month posttreat followup ) were includ . in the analysi of result , the chi-squar test of behavior observ base on a three-month posttreat followup reveal a statist signific differ in fli behavior between the group [ chi /sup 2/(4)=19.41 , p<0.001 ] . onli one particip ( 10 % ) who receiv iet , eight of the ten particip ( 80 % ) who receiv vrgetno , and ten out of the ten particip ( 100 % ) who receiv vrgetpm report an abil to fli without medic or alcohol at three-month followup . although thi studi includ small sampl size for the three group , the result show vrget wa more effect than iet in the treatment of fli . it also suggest that physiolog feedback may add to the efficaci of vr treatment

virtual reality graded exposure therapy
imaginal exposure therapy
phobia
physiological feedback
physiology
questionnaires
subjective ratings of anxiety
behavioral observations
Chi-square test
flying fear
patient treatment


Stabilization of global invariant sets for chaotic systems: an energy based control approach

Abstract: This paper presents a new control approach for steering trajectories of three-dimensional nonlinear chaotic systems towards stable stationary states or time-periodic orbits. The proposed method mainly consists in a sliding mode-based control design that is extended by an explicit consideration of system energy as basis for both controller design and system stabilization. The control objective is then to regulate the energy with respect to a shaped nominal representation implicitly related to system trajectories. In this paper, we establish some theoretical results to introduce the control design approach referred to as energy based sliding mode control. Then, some capabilities of the proposed approach are illustrated through examples related to the chaotic circuit of Chua

stabil of global invari set for chaotic system : an energi base control approach
 thi paper present a new control approach for steer trajectori of three-dimension nonlinear chaotic system toward stabl stationari state or time-period orbit . the propos method mainli consist in a slide mode-bas control design that is extend by an explicit consider of system energi as basi for both control design and system stabil . the control object is then to regul the energi with respect to a shape nomin represent implicitli relat to system trajectori . in thi paper , we establish some theoret result to introduc the control design approach refer to as energi base slide mode control . then , some capabl of the propos approach are illustr through exampl relat to the chaotic circuit of chua


Knowledge flow management for distributed team software development

Abstract: Cognitive cooperation is often neglected in current team software development processes. This issue becomes more important than ever when team members are globally distributed. This paper presents a notion of knowledge flow and the related management mechanism for realizing an ordered knowledge sharing and cognitive cooperation in a geographically distributed team software development process. The knowledge flow can carry and accumulate knowledge when it goes through from one team member to another. The coordination between the knowledge flow process and the workflow process of a development team provides a new way to improve traditional team software development processes. A knowledge grid platform has been implemented to support the knowledge flow management across the Internet

knowledg flow manag for distribut team softwar develop
 cognit cooper is often neglect in current team softwar develop process . thi issu becom more import than ever when team member are global distribut . thi paper present a notion of knowledg flow and the relat manag mechan for realiz an order knowledg share and cognit cooper in a geograph distribut team softwar develop process . the knowledg flow can carri and accumul knowledg when it goe through from one team member to anoth . the coordin between the knowledg flow process and the workflow process of a develop team provid a new way to improv tradit team softwar develop process . a knowledg grid platform ha been implement to support the knowledg flow manag across the internet

knowledge flow management
distributed team software development
cognitive cooperation
ordered knowledge sharing
workflow process
knowledge grid platform
Internet
knowledge flow representation
software development management
cooperative work


Application of XML for neural network exchange

Abstract: This article introduces a framework for the interchange of trained neural network models. An XML-based language (Neural Network Markup Language) for the neural network model description is offered. It allows to write down all the components of neural network model which are necessary for its reproduction. We propose to use XML notation for the full description of neural models, including data dictionary, properties of training sample, preprocessing methods, details of network structure and parameters and methods for network output interpretation

applic of xml for neural network exchang
 thi articl introduc a framework for the interchang of train neural network model . an xml-base languag ( neural network markup languag ) for the neural network model descript is offer . it allow to write down all the compon of neural network model which are necessari for it reproduct . we propos to use xml notat for the full descript of neural model , includ data dictionari , properti of train sampl , preprocess method , detail of network structur and paramet and method for network output interpret

XML
neural network exchange
neural network markup language
data dictionary
preprocessing methods
network structure
network output interpretation


Taiwan power company phases into AM/FM

Abstract: To face the challenges and impact of the inevitable trend toward privatization and deregulation, the Taiwan Power Co. (TPC) devised short- and long-term strategic computerization development plans. These development efforts created a master plan that included building an Automated Mapping and Facilities Management (AM/ FM) system for Taipei City District Office (TCDO). This project included a pilot project followed by evaluation before the roll out to the complete service territory of TCDO. The pilot project took three years to install, commission and-via the evaluation process-reach the conclusion that AM/FM was technologically feasible

taiwan power compani phase into am / fm
 to face the challeng and impact of the inevit trend toward privat and deregul , the taiwan power co. ( tpc ) devis short- and long-term strateg computer develop plan . these develop effort creat a master plan that includ build an autom map and facil manag ( am/ fm ) system for taipei citi district offic ( tcdo ) . thi project includ a pilot project follow by evalu befor the roll out to the complet servic territori of tcdo . the pilot project took three year to instal , commiss and-via the evalu process-reach the conclus that am / fm wa technolog feasibl


An efficient and stable ray tracing algorithm for parametric surfaces

Abstract: In this paper, we propose an efficient and stable algorithm for finding ray-surface intersections. Newton's method and Bezier clipping are adapted to form the core of our algorithm. Ray coherence is used to find starting points for Newton iteration. We introduce an obstruction detection technique to verify whether an intersection point found using Newton's method is the closest. When Newton's method fails to achieve convergence, we use Bezier clipping substitution to find the intersection points. This combination achieves a significant improvement in tracing primary rays. A similar approach successfully improves the performance of tracing secondary rays

an effici and stabl ray trace algorithm for parametr surfac
 in thi paper , we propos an effici and stabl algorithm for find ray-surfac intersect . newton 's method and bezier clip are adapt to form the core of our algorithm . ray coher is use to find start point for newton iter . we introduc an obstruct detect techniqu to verifi whether an intersect point found use newton 's method is the closest . when newton 's method fail to achiev converg , we use bezier clip substitut to find the intersect point . thi combin achiev a signific improv in trace primari ray . a similar approach success improv the perform of trace secondari ray

parametric surfaces
ray-surface intersections
Bezier clipping
ray coherence
Newton iteration
obstruction detection technique
convergence
efficient stable ray tracing algorithm
Newton method
primary ray tracing
secondary ray tracing


Time-resolved contrast-enhanced imaging with isotropic resolution and broad coverage using an undersampled 3D projection trajectory

Abstract: Time-resolved contrast-enhanced 3D MR angiography (MRA) methods have gained in popularity but are still limited by the tradeoff between spatial and temporal resolution. A method is presented that greatly reduces this tradeoff by employing undersampled 3D projection reconstruction trajectories. The variable density k-space sampling intrinsic to this sequence is combined with temporal k-space interpolation to provide time frames as short as 4 s. This time resolution reduces the need for exact contrast timing while also providing dynamic information. Spatial resolution is determined primarily by the projection readout resolution and is thus isotropic across the FOV, which is also isotropic. Although undersampling the outer regions of k-space introduces aliased energy into the image, which may compromise resolution, this is not a limiting factor in high-contrast applications such as MRA. Results from phantom and volunteer studies are presented demonstrating isotropic resolution, broad coverage with an isotropic field of view (FOV), minimal projection reconstruction artifacts, and temporal information. In one application, a single breath-hold exam covering the entire pulmonary vasculature generates high-resolution, isotropic imaging volumes depicting the bolus passage

time-resolv contrast-enhanc imag with isotrop resolut and broad coverag use an undersampl 3d project trajectori
 time-resolv contrast-enhanc 3d mr angiographi ( mra ) method have gain in popular but are still limit by the tradeoff between spatial and tempor resolut . a method is present that greatli reduc thi tradeoff by employ undersampl 3d project reconstruct trajectori . the variabl densiti k-space sampl intrins to thi sequenc is combin with tempor k-space interpol to provid time frame as short as 4 s. thi time resolut reduc the need for exact contrast time while also provid dynam inform . spatial resolut is determin primarili by the project readout resolut and is thu isotrop across the fov , which is also isotrop . although undersampl the outer region of k-space introduc alias energi into the imag , which may compromis resolut , thi is not a limit factor in high-contrast applic such as mra . result from phantom and volunt studi are present demonstr isotrop resolut , broad coverag with an isotrop field of view ( fov ) , minim project reconstruct artifact , and tempor inform . in one applic , a singl breath-hold exam cover the entir pulmonari vasculatur gener high-resolut , isotrop imag volum depict the bolu passag

time-resolved contrast-enhanced imaging
isotropic resolution
broad coverage
undersampled 3D projection trajectory
variable density k-space sampling
temporal k-space interpolation
isotropic field of view
pulmonary vasculature
bolus passage
3D MRI angiography
abdomen
thorax
image artifacts
breath-hold imaging


Groove Networks. Matching technology with human needs

Abstract: If what has been occurring in information technology during the past decade or so can be classified as the "Information Age," then going forward, I believe it's going to be viewed more as the "connection age"," says Ray Ozzie, CEO and chairman of Groove Networks, the Beverly, Massachusetts company that produces collaboration software. "We're all going to be thinking more about the connections between people and the connections between companies," Ozzie says. "Our mission has two parts: to help businesses achieve a greater "return on connection" from their relationships with customers, vendors, and partners; and to help individuals strengthen online connections with the people with whom they interact."

groov network . match technolog with human need
 if what ha been occur in inform technolog dure the past decad or so can be classifi as the " inform age , " then go forward , i believ it 's go to be view more as the " connect age " , " say ray ozzi , ceo and chairman of groov network , the beverli , massachusett compani that produc collabor softwar . " we 're all go to be think more about the connect between peopl and the connect between compani , " ozzi say . " our mission ha two part : to help busi achiev a greater " return on connect " from their relationship with custom , vendor , and partner ; and to help individu strengthen onlin connect with the peopl with whom they interact . "

Groove Networks
businesses
online connections
server products
organizational perspective
personal perspective
online collaboration
knowledge work
collaborative technologies
inking technology


The real story behind Calpoint [telecom]

Abstract: A former Qwest executive sheds light on the carrier's controversial deal with Calpoint. Discusses why Calpoint gets a monthly check from Quest, regardless of whether it provides services

the real stori behind calpoint [ telecom ]
 a former qwest execut shed light on the carrier 's controversi deal with calpoint . discuss whi calpoint get a monthli check from quest , regardless of whether it provid servic


Women of color in computing

Abstract: It is well known that there is a need to increase the number of women in the area of computing, that is in computer science and computer engineering. If we consider women of color, that is women of under-represented ethnicities, we find the numbers are very dismal. The goal of this article is to bring to light the unique issues of women of color based upon the personal experience of one African-American woman who has been in the field of computing for over 20 years (including the years of higher education)

women of color in comput
 it is well known that there is a need to increas the number of women in the area of comput , that is in comput scienc and comput engin . if we consid women of color , that is women of under-repres ethnic , we find the number are veri dismal . the goal of thi articl is to bring to light the uniqu issu of women of color base upon the person experi of one african-american woman who ha been in the field of comput for over 20 year ( includ the year of higher educ )

women of color
computer science
computer engineering
higher education
ethnic minority
society
gender issues


Storage functionals and Lyapunov functions for passive dynamical systems

Abstract: For nonlinear time-invariant input-output dynamical systems the passivity conditions are obtained under some restrictions. The conditions imply storage functions satisfying a dissipation inequality. A class of storage functions allowing unique reconstruction of a passive dynamical system is defined. These results are illustrated by an example of a linear system with fading memory. An important, for practical application, class of the linear relaxation systems without direct input-output interaction is considered. A necessary condition for dynamical systems to be of the relaxation type is obtained for this class. The condition is connected with the existence of a unique quadratic Lyapunov function satisfying the complete monotonicity condition. This unique Lyapunov function corresponds to a "standard" thermodynamic potential in a compact family of potentials in the nonequilibrium thermodynamics. The results obtained can be useful in automatic control, mechanics of viscoelastic materials, and various applications in physics and the system theory

storag function and lyapunov function for passiv dynam system
 for nonlinear time-invari input-output dynam system the passiv condit are obtain under some restrict . the condit impli storag function satisfi a dissip inequ . a class of storag function allow uniqu reconstruct of a passiv dynam system is defin . these result are illustr by an exampl of a linear system with fade memori . an import , for practic applic , class of the linear relax system without direct input-output interact is consid . a necessari condit for dynam system to be of the relax type is obtain for thi class . the condit is connect with the exist of a uniqu quadrat lyapunov function satisfi the complet monoton condit . thi uniqu lyapunov function correspond to a " standard " thermodynam potenti in a compact famili of potenti in the nonequilibrium thermodynam . the result obtain can be use in automat control , mechan of viscoelast materi , and variou applic in physic and the system theori


Quantum-state information retrieval in a Rydberg-atom data register

Abstract: We analyze a quantum search protocol to retrieve phase information from a Rydberg-atom data register using a subpicosecond half-cycle electric field pulse. Calculations show that the half-cycle pulse can perform the phase retrieval only within a range of peak field values. By varying the phases of the constituent orbitals of the Rydberg wave packet register, we demonstrate coherent control of the phase retrieval process. By specially programming the phases of the orbitals comprising the initial wave packet, we show that it is possible to use the search method as a way to synthesize single energy eigenstates

quantum-st inform retriev in a rydberg-atom data regist
 we analyz a quantum search protocol to retriev phase inform from a rydberg-atom data regist use a subpicosecond half-cycl electr field puls . calcul show that the half-cycl puls can perform the phase retriev onli within a rang of peak field valu . by vari the phase of the constitu orbit of the rydberg wave packet regist , we demonstr coher control of the phase retriev process . by special program the phase of the orbit compris the initi wave packet , we show that it is possibl to use the search method as a way to synthes singl energi eigenst


A stochastic averaging approach for feedback control design of nonlinear systems under random excitations

Abstract: This paper presents a method for designing and quantifying the performance of feedback stochastic controls for nonlinear systems. The design makes use of the method of stochastic averaging to reduce the dimension of the state space and to derive the Ito stochastic differential equation for the response amplitude process. The moment equation of the amplitude process closed by the Rayleigh approximation is used as a means to characterize the transient performance of the feedback control. The steady state and transient response of the amplitude process are used as the design criteria for choosing the feedback control gains. Numerical examples are studied to demonstrate the performance of the control

a stochast averag approach for feedback control design of nonlinear system under random excit
 thi paper present a method for design and quantifi the perform of feedback stochast control for nonlinear system . the design make use of the method of stochast averag to reduc the dimens of the state space and to deriv the ito stochast differenti equat for the respons amplitud process . the moment equat of the amplitud process close by the rayleigh approxim is use as a mean to character the transient perform of the feedback control . the steadi state and transient respons of the amplitud process are use as the design criteria for choos the feedback control gain . numer exampl are studi to demonstr the perform of the control

stochastic averaging
feedback control
nonlinear systems
random excitations
feedback stochastic controls
Ito stochastic differential equation
Rayleigh approximation
steady state
transient response


Women in computing around the world

Abstract: This paper describes the participation of women in computing in more than 30 countries, by focussing on participation at undergraduate level. A brief discussion covers how societal and cultural factors may affect women's participation. Statistics from many different sources are presented for comparison. Generally, participation is low - most countries fall in the 10-40% range with a few below 10% and a few above 40%

women in comput around the world
 thi paper describ the particip of women in comput in more than 30 countri , by focuss on particip at undergradu level . a brief discuss cover how societ and cultur factor may affect women 's particip . statist from mani differ sourc are present for comparison . gener , particip is low - most countri fall in the 10 - 40 % rang with a few below 10 % and a few abov 40 %

women
cultural factors
statistics
undergraduate computing
societal factors


A quantum full adder for a scalable nuclear spin quantum computer

Abstract: We demonstrate a strategy for implementation a quantum full adder in a spin chain quantum computer. As an example, we simulate a quantum full adder in a chain containing 201 spins. Our simulations also demonstrate how one can minimize errors generated by non-resonant effects

a quantum full adder for a scalabl nuclear spin quantum comput
 we demonstr a strategi for implement a quantum full adder in a spin chain quantum comput . as an exampl , we simul a quantum full adder in a chain contain 201 spin . our simul also demonstr how one can minim error gener by non-reson effect

quantum full adder
scalable nuclear spin quantum computer
nonresonant effects
error minimization


New wrinkle on the Web? Hmm. [banking]

Abstract: The financial sector produced its share of technology hype during the new economy years. You. can't blame folks if the next next thing, a wave of Internet-related innovation called Web services, is being met with healthy skepticism. Many gurus are placing their bets on Web services to drive the next chapter of finance technology, dramatically upgrading disappointing automated customer management strategies by electronically breaking down barriers between products, firms and customers, and perhaps creating a whole new line of business in the process. But it's not a magic wand. It doesn't change the need for a bank to reorganize and streamline its operations

new wrinkl on the web ? hmm . [ bank ]
 the financi sector produc it share of technolog hype dure the new economi year . you . ca n't blame folk if the next next thing , a wave of internet-rel innov call web servic , is be met with healthi skeptic . mani guru are place their bet on web servic to drive the next chapter of financ technolog , dramat upgrad disappoint autom custom manag strategi by electron break down barrier between product , firm and custom , and perhap creat a whole new line of busi in the process . but it 's not a magic wand . it doe n't chang the need for a bank to reorgan and streamlin it oper