Nonlinear control of a shape memory alloy actuated manipulator

Abstract: This paper presents a nonlinear, robust control algorithm for accurate positioning of a single degree of freedom rotary manipulator actuated by Shape Memory Alloy (SMA). A model for an SMA actuated manipulator is presented. The model includes nonlinear dynamics of the manipulator, a constitutive model of Shape Memory Alloy, and electrical and heat transfer behavior of SMA wire. This model is used for open and closed loop motion simulations of the manipulator. Experiments are presented that show results similar to both closed and open loop simulation results. Due to modeling uncertainty and nonlinear behavior of the system, classic control methods such as Proportional-Integral-Derivative control are not able to present fast and accurate performance. Hence a nonlinear, robust control algorithm is presented based on Variable Structure Control. This algorithm is a control gain switching technique based on the weighted average of position and velocity feedbacks. This method has been designed through simulation and tested experimentally. Results show fast, accurate, and robust performance of the control system. Computer simulation and experimental results for different stabilization and tracking situations are also presented

nonlinear control of a shape memori alloy actuat manipul
 thi paper present a nonlinear , robust control algorithm for accur posit of a singl degre of freedom rotari manipul actuat by shape memori alloy ( sma ) . a model for an sma actuat manipul is present . the model includ nonlinear dynam of the manipul , a constitut model of shape memori alloy , and electr and heat transfer behavior of sma wire . thi model is use for open and close loop motion simul of the manipul . experi are present that show result similar to both close and open loop simul result . due to model uncertainti and nonlinear behavior of the system , classic control method such as proportional-integral-deriv control are not abl to present fast and accur perform . henc a nonlinear , robust control algorithm is present base on variabl structur control . thi algorithm is a control gain switch techniqu base on the weight averag of posit and veloc feedback . thi method ha been design through simul and test experiment . result show fast , accur , and robust perform of the control system . comput simul and experiment result for differ stabil and track situat are also present

nonlinear control
shape memory alloy
manipulator
positioning
nonlinear dynamics
closed loop
open loop
variable structure control
control gain switching
feedback
stabilization
tracking


Quantum retrodiction in open systems

Abstract: Quantum retrodiction involves finding the probabilities for various preparation events given a measurement event. This theory has been studied for some time but mainly as an interesting concept associated with time asymmetry in quantum mechanics. Recent interest in quantum communications and cryptography, however, has provided retrodiction with a potential practical application. For this purpose quantum retrodiction in open systems should be more relevant than in closed systems isolated from the environment. In this paper we study retrodiction in open systems and develop a general master equation for the backward time evolution of the measured state, which can be used for calculating preparation probabilities. We solve the master equation, by way of example, for the driven two-level atom coupled to the electromagnetic field

quantum retrodict in open system
 quantum retrodict involv find the probabl for variou prepar event given a measur event . thi theori ha been studi for some time but mainli as an interest concept associ with time asymmetri in quantum mechan . recent interest in quantum commun and cryptographi , howev , ha provid retrodict with a potenti practic applic . for thi purpos quantum retrodict in open system should be more relev than in close system isol from the environ . in thi paper we studi retrodict in open system and develop a gener master equat for the backward time evolut of the measur state , which can be use for calcul prepar probabl . we solv the master equat , by way of exampl , for the driven two-level atom coupl to the electromagnet field

driven two level atom-electromagnetic field coupling


Ten years of strategies to increase participation of women in computing programs. The Central Queensland University experience: 1999-2001

Abstract: In the late eighties, the participation rate of women in information technology courses in most Australian Universities was around 25%. This low level of women's participation in computing courses occurs not only in Australia but also overseas. More studies indicate that the participation rates have not improved and in fact may be even further in decline. Participation rates in the workforce also appear to be in decline. Concerned at the imbalance within Australia, the Federal government directed all Australian Universities to increase the number of women in courses leading to a professional computing qualification (i.e., information technology courses) to 40% of students by 1995. This paper details one Australian university's approach, over a 10 year period (1991-2001), to redress this imbalance. We provide examples of intervention strategies developed and the outcomes for these strategies. We present the outcomes against a background frame of the Australian Higher Education scene of that decade which was influenced by funding levels to universities in general and to equity programs in particular. We present data related to the participation of women in computing programs along with snapshots of the overall changing student demographics over this period

ten year of strategi to increas particip of women in comput program . the central queensland univers experi : 1999 - 2001
 in the late eighti , the particip rate of women in inform technolog cours in most australian univers wa around 25 % . thi low level of women 's particip in comput cours occur not onli in australia but also oversea . more studi indic that the particip rate have not improv and in fact may be even further in declin . particip rate in the workforc also appear to be in declin . concern at the imbal within australia , the feder govern direct all australian univers to increas the number of women in cours lead to a profession comput qualif ( i.e. , inform technolog cours ) to 40 % of student by 1995 . thi paper detail one australian univers 's approach , over a 10 year period ( 1991 - 2001 ) , to redress thi imbal . we provid exampl of intervent strategi develop and the outcom for these strategi . we present the outcom against a background frame of the australian higher educ scene of that decad which wa influenc by fund level to univers in gener and to equiti program in particular . we present data relat to the particip of women in comput program along with snapshot of the overal chang student demograph over thi period

women
computing programs
Central Queensland University
Australian Higher Education
demographics


Life after bankruptcy [telecom carriers]

Abstract: How comeback telecom carriers are changing industry economics, and why others may have no choice but to follow their lead

life after bankruptci [ telecom carrier ]
 how comeback telecom carrier are chang industri econom , and whi other may have no choic but to follow their lead

bankruptcy
telecom carriers
industry economics
restructured companies
debt levels


Quantum computing with spin qubits in semiconductor structures

Abstract: We survey recent work on designing and evaluating quantum computing implementations based on nuclear or bound-electron spins in semiconductor heterostructures at low temperatures and in high magnetic fields. General overview is followed by a summary of results of our theoretical calculations of decoherence time scales and spin-spin interactions. The latter were carried out for systems for which the two-dimensional electron gas provides the dominant carrier for spin dynamics via exchange of spin-excitons in the integer quantum Hall regime

quantum comput with spin qubit in semiconductor structur
 we survey recent work on design and evalu quantum comput implement base on nuclear or bound-electron spin in semiconductor heterostructur at low temperatur and in high magnet field . gener overview is follow by a summari of result of our theoret calcul of decoher time scale and spin-spin interact . the latter were carri out for system for which the two-dimension electron ga provid the domin carrier for spin dynam via exchang of spin-exciton in the integ quantum hall regim

quantum computing
spin qubits
semiconductor structures
semiconductor heterostructures
low temperatures
high magnetic fields
spin-spin interactions
dominant carrier
spin dynamics
integer quantum Hall regime
2D electron gas
2DEG
spin-excitons exchange
integer QHE


Some properties of Hadamard matrices coming from dihedral groups

Abstract: H. Kimura (1996) introduced a method to construct Hadamard matrices of degree 8n + 4 from the dihedral group of order 2n. In this paper we study some properties of this construction

some properti of hadamard matric come from dihedr group
 h. kimura ( 1996 ) introduc a method to construct hadamard matric of degre 8n + 4 from the dihedr group of order 2n . in thi paper we studi some properti of thi construct


Knowledge acquisition and ontology modelling for construction of a control and monitoring expert system

Abstract: This paper presents the processes of knowledge acquisition and ontology development for structuring the knowledge base of an expert system. Ontological engineering is a process that facilitates construction of the knowledge base of an intelligent system. Ontology is the study of the organization and classification of knowledge. Ontological engineering in artificial intelligence has the practical goal of constructing frameworks for knowledge that allow computational systems to tackle knowledge-intensive problems and it supports knowledge sharing and reuse. To illustrate the process of conceptual modelling using the Inferential Modelling Technique as a basis for ontology construction, the tool and processes are applied to build an expert system in the domain of monitoring of a petroleum-production facility

knowledg acquisit and ontolog model for construct of a control and monitor expert system
 thi paper present the process of knowledg acquisit and ontolog develop for structur the knowledg base of an expert system . ontolog engin is a process that facilit construct of the knowledg base of an intellig system . ontolog is the studi of the organ and classif of knowledg . ontolog engin in artifici intellig ha the practic goal of construct framework for knowledg that allow comput system to tackl knowledge-intens problem and it support knowledg share and reus . to illustr the process of conceptu model use the inferenti model techniqu as a basi for ontolog construct , the tool and process are appli to build an expert system in the domain of monitor of a petroleum-product facil

knowledge acquisition
ontology modelling
control and monitoring expert system
knowledge base
ontological engineering
intelligent system
artificial intelligence
inferential modelling technique
petroleum-production facility
knowledge reuse


Training for trouble

Abstract: In a security context, one example of digitized video's integration into a networked knowledge base is found in the Accident Response Group (ARG) at Sandia National Labs. A "national security laboratory" headquartered in Albuquerque, New Mexico, Sandia is operated by Lockheed Martin and primarily funded by the U.S. Department of Energy. The organization handles research, design and development of all non-nuclear components used in U.S. nuclear weapons programs, and is involved as well in programs related to energy, critical infrastructure, non-proliferation, materials control, and emerging threats. ARG's searchable video database has been implemented using the Screening Room package of applications from Convera in Vienna, Virginia. Formed in December 2000 from Excalibur Technologies and Intel's Interactive Media Services Division, Convera targets corporate and institutional markets with products for securely accessing, indexing, and searching rich media content-text, images, audio, and video-across interconnected computer networks. Among its public-sector clients are the FBI, NASA, the Nuclear Regulatory Commission, U.S. military services, the Departments of Justice and State, and various domestic and foreign intelligence agencies

train for troubl
 in a secur context , one exampl of digit video 's integr into a network knowledg base is found in the accid respons group ( arg ) at sandia nation lab . a " nation secur laboratori " headquart in albuquerqu , new mexico , sandia is oper by lockhe martin and primarili fund by the u.s. depart of energi . the organ handl research , design and develop of all non-nuclear compon use in u.s. nuclear weapon program , and is involv as well in program relat to energi , critic infrastructur , non-prolifer , materi control , and emerg threat . arg 's searchabl video databas ha been implement use the screen room packag of applic from convera in vienna , virginia . form in decemb 2000 from excalibur technolog and intel 's interact media servic divis , convera target corpor and institut market with product for secur access , index , and search rich media content-text , imag , audio , and video-across interconnect comput network . among it public-sector client are the fbi , nasa , the nuclear regulatori commiss , u.s. militari servic , the depart of justic and state , and variou domest and foreign intellig agenc

networked knowledge base
Accident Response Group
Sandia National Labs
national security laboratory
U.S. nuclear weapons programs
searchable video database
Screening Room package
public-sector clients
digitized video integration
rich media content


The curious ways of professional cultures and the "two-body opportunity"

Abstract: When two professionals are a couple, we sometimes refer to them as having a "two-body problem." However, when each partner of a couple exists in the same cultures, they also have an opportunity for deeply shared understanding and empathy, simply because each understands at a deep level the culture in which the other works. I explore this notion. A couple has what we call the "two-body problem" when both are professionals who are qualified for a kind of position that is relatively rare and who are very selective about the positions that they accept. For example, there are relatively scant numbers of jobs as a computer science professor-at any level. An individual considering an academic job may only be interested in research universities, or in teaching universities, restricting the choice of open positions substantially. The classic two-body "problem" arises when one partner wants to accept a new position that requires geographical relocation. Then, the other partner also needs to find a new position. Moreover, it can be very difficult to find a suitable position when they are naturally scarce

the curiou way of profession cultur and the " two-bodi opportun "
 when two profession are a coupl , we sometim refer to them as have a " two-bodi problem . " howev , when each partner of a coupl exist in the same cultur , they also have an opportun for deepli share understand and empathi , simpli becaus each understand at a deep level the cultur in which the other work . i explor thi notion . a coupl ha what we call the " two-bodi problem " when both are profession who are qualifi for a kind of posit that is rel rare and who are veri select about the posit that they accept . for exampl , there are rel scant number of job as a comput scienc professor-at ani level . an individu consid an academ job may onli be interest in research univers , or in teach univers , restrict the choic of open posit substanti . the classic two-bodi " problem " aris when one partner want to accept a new posit that requir geograph reloc . then , the other partner also need to find a new posit . moreov , it can be veri difficult to find a suitabl posit when they are natur scarc

professional cultures
two-body opportunity
computer science
academics


Software vendors' failure fuels consolidation theories [telecom interconnection and billing]

Abstract: As independent software vendors like AP Engines fall by the wayside as independent entities, attrition could accelerate consolidation in the OSS space

softwar vendor ' failur fuel consolid theori [ telecom interconnect and bill ]
 as independ softwar vendor like ap engin fall by the waysid as independ entiti , attrit could acceler consolid in the oss space

consolidation
telecom interconnection
AP Engines
telecom billing
operations supports systems
Quintessent


Synthesis of the control systems via reflection onto auxiliary surfaces

Abstract: An approach to robust control systems synthesis, both linear and nonlinear, and nonstationary is offered. The control is carried out, providing the given phase constraints varied in acceptable limits, in view of constraints on its value and incompleteness of the information about functioning disturbances. The approach is based on the introduction of auxiliary integral surfaces, on which the initial moving is projected. As a result the reduced equivalent moving is formed, being described by the scalar equation which in many important cases can be integrated directly. On the basis of the equation obtained solving a synthesis task is carried out and can be reduced to algebraic or integral inequalities. The final relations defined for linear equivalent moving are presented

synthesi of the control system via reflect onto auxiliari surfac
 an approach to robust control system synthesi , both linear and nonlinear , and nonstationari is offer . the control is carri out , provid the given phase constraint vari in accept limit , in view of constraint on it valu and incomplet of the inform about function disturb . the approach is base on the introduct of auxiliari integr surfac , on which the initi move is project . as a result the reduc equival move is form , be describ by the scalar equat which in mani import case can be integr directli . on the basi of the equat obtain solv a synthesi task is carri out and can be reduc to algebra or integr inequ . the final relat defin for linear equival move are present

auxiliary surfaces
robust control systems
control systems synthesis
integral inequalities
linear equivalent moving
linear systems
nonlinear systems
algebraic inequalities


Strategic implementation of IT/IS projects in construction: a case study

Abstract: The need for improved implementation of Information Technology (IT) and Information Systems (IS) has been emphasised in both empirical and prescriptive research studies. This problem is magnified in the construction industry, which has been slow to embrace and utilise new technologies with negative consequences on productivity and innovation. This paper presents a strategic implementation framework for IT/IS projects in construction. The framework builds upon recent published works and encompasses well-documented predictors for effective IT/IS implementation. A case study with a large multi-national construction organisation is used to demonstrate the strategic implementation of a Project Management Information System (PMIS) used for the construction of a mobile phone telecommunications network in the South East of Queensland, Australia

strateg implement of it / is project in construct : a case studi
 the need for improv implement of inform technolog ( it ) and inform system ( is ) ha been emphasis in both empir and prescript research studi . thi problem is magnifi in the construct industri , which ha been slow to embrac and utilis new technolog with neg consequ on product and innov . thi paper present a strateg implement framework for it / is project in construct . the framework build upon recent publish work and encompass well-docu predictor for effect it / is implement . a case studi with a larg multi-n construct organis is use to demonstr the strateg implement of a project manag inform system ( pmi ) use for the construct of a mobil phone telecommun network in the south east of queensland , australia


Direct aperture optimization: A turnkey solution for step-and-shoot IMRT

Abstract: IMRT treatment plans for step-and-shoot delivery have traditionally been produced through the optimization of intensity distributions (or maps) for each beam angle. The optimization step is followed by the application of a leaf-sequencing algorithm that translates each intensity map into a set of deliverable aperture shapes. In this article, we introduce an automated planning system in which we bypass the traditional intensity optimization, and instead directly optimize the shapes and the weights of the apertures. We call this approach "direct aperture optimization." This technique allows the user to specify the maximum number of apertures per beam direction, and hence provides significant control over the complexity of the treatment delivery. This is possible because the machine dependent delivery constraints imposed by the MLC are enforced within the aperture optimization algorithm rather than in a separate leaf-sequencing step. The leaf settings and the aperture intensities are optimized simultaneously using a simulated annealing algorithm. We have tested direct aperture optimization on a variety of patient cases using the EGS4/BEAM Monte Carlo package for our dose calculation engine. The results demonstrate that direct aperture optimization can produce highly conformal step-and-shoot treatment plans using only three to five apertures per beam direction. As compared with traditional optimization strategies, our studies demonstrate that direct aperture optimization can result in a significant reduction in both the number of beam segments and the number of monitor units. Direct aperture optimization therefore produces highly efficient treatment deliveries that maintain the full dosimetric benefits of IMRT

direct apertur optim : a turnkey solut for step-and-shoot imrt
 imrt treatment plan for step-and-shoot deliveri have tradit been produc through the optim of intens distribut ( or map ) for each beam angl . the optim step is follow by the applic of a leaf-sequenc algorithm that translat each intens map into a set of deliver apertur shape . in thi articl , we introduc an autom plan system in which we bypass the tradit intens optim , and instead directli optim the shape and the weight of the apertur . we call thi approach " direct apertur optim . " thi techniqu allow the user to specifi the maximum number of apertur per beam direct , and henc provid signific control over the complex of the treatment deliveri . thi is possibl becaus the machin depend deliveri constraint impos by the mlc are enforc within the apertur optim algorithm rather than in a separ leaf-sequenc step . the leaf set and the apertur intens are optim simultan use a simul anneal algorithm . we have test direct apertur optim on a varieti of patient case use the egs4 / beam mont carlo packag for our dose calcul engin . the result demonstr that direct apertur optim can produc highli conform step-and-shoot treatment plan use onli three to five apertur per beam direct . as compar with tradit optim strategi , our studi demonstr that direct apertur optim can result in a signific reduct in both the number of beam segment and the number of monitor unit . direct apertur optim therefor produc highli effici treatment deliveri that maintain the full dosimetr benefit of imrt

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


An interlingua-based Chinese-English MT system

Abstract: Chinese-English machine translation is a significant and challenging problem in information processing. The paper presents an interlingua-based Chinese-English natural language translation system (ICENT). It introduces the realization mechanism of Chinese language analysis, which contains syntactic parsing and semantic analyzing and gives the design of interlingua in details. Experimental results and system evaluation are given. The result is satisfying

an interlingua-bas chinese-english mt system
 chinese-english machin translat is a signific and challeng problem in inform process . the paper present an interlingua-bas chinese-english natur languag translat system ( icent ) . it introduc the realiz mechan of chines languag analysi , which contain syntact pars and semant analyz and give the design of interlingua in detail . experiment result and system evalu are given . the result is satisfi

interlingua-based Chinese-English machine translation system


The development of virtual reality therapy (VRT) system for the treatment of acrophobia and therapeutic case

Abstract: Virtual reality therapy (VRT), based on this sophisticated technology, has been used in the treatment of subjects diagnosed with acrophobia, a disorder that is characterized by marked anxiety upon exposure to heights and avoidance of heights. Conventional VR systems for the treatment of acrophobia have limitations, over-costly devices or somewhat unrealistic graphic scenes. The goal of this study was to develop an inexpensive and more realistic virtual environment (VE) in which to perform exposure therapy for acrophobia. It is based on a personal computer, and a virtual scene of a bunge-jump tower in the middle of a large city. The virtual scenario includes an open lift surrounded by props beside a tower, which allows the patient to feel a sense of heights. The effectiveness of the VE was evaluated through the clinical treatment of a subject who was suffering from the fear of heights. As a result, it was proved that this VR environment was effective and realistic at overcoming acrophobia according not only to the comparison results of a variety of questionnaires before and after treatment but also to the subject's comments that the VE seemed to evoke more fearful feelings than the real situation

the develop of virtual realiti therapi ( vrt ) system for the treatment of acrophobia and therapeut case
 virtual realiti therapi ( vrt ) , base on thi sophist technolog , ha been use in the treatment of subject diagnos with acrophobia , a disord that is character by mark anxieti upon exposur to height and avoid of height . convent vr system for the treatment of acrophobia have limit , over-costli devic or somewhat unrealist graphic scene . the goal of thi studi wa to develop an inexpens and more realist virtual environ ( ve ) in which to perform exposur therapi for acrophobia . it is base on a person comput , and a virtual scene of a bunge-jump tower in the middl of a larg citi . the virtual scenario includ an open lift surround by prop besid a tower , which allow the patient to feel a sens of height . the effect of the ve wa evalu through the clinic treatment of a subject who wa suffer from the fear of height . as a result , it wa prove that thi vr environ wa effect and realist at overcom acrophobia accord not onli to the comparison result of a varieti of questionnair befor and after treatment but also to the subject 's comment that the ve seem to evok more fear feel than the real situat

therapeutic case
realistic virtual environment
exposure therapy
personal computer
virtual scene
clinical treatment
virtual reality therapy system
acrophobia treatment
patient anxiety
patient treatment
psychotherapy
heights phobia


Design and implementation of a flexible manufacturing control system using neural network

Abstract: Design and implementation of a sequential controller based on the concept of artificial neural networks for a flexible manufacturing system are presented. The recurrent neural network (RNN) type is used for such a purpose. Contrary to the programmable controller, an RNN-based sequential controller is based on a definite mathematical model rather than depending on the experience and trial and error techniques. The proposed controller is also more flexible because it is not limited by the restrictions of the finite state automata theory. Adequate guidelines of how to construct an RNN-based sequential controller are presented. These guidelines are applied to different case studies. The proposed controller is tested by simulations and real-time experiments. These tests prove the successfulness of the proposed controller performances. Theoretical as well as experimental results are presented and discussed indicating that the proposed design procedure using Elman's RNN can be effective in designing a sequential controller for event-based type manufacturing systems. In addition, the simulation results assure the effectiveness of the proposed controller to overcome the effect of noisy inputs

design and implement of a flexibl manufactur control system use neural network
 design and implement of a sequenti control base on the concept of artifici neural network for a flexibl manufactur system are present . the recurr neural network ( rnn ) type is use for such a purpos . contrari to the programm control , an rnn-base sequenti control is base on a definit mathemat model rather than depend on the experi and trial and error techniqu . the propos control is also more flexibl becaus it is not limit by the restrict of the finit state automata theori . adequ guidelin of how to construct an rnn-base sequenti control are present . these guidelin are appli to differ case studi . the propos control is test by simul and real-tim experi . these test prove the success of the propos control perform . theoret as well as experiment result are present and discuss indic that the propos design procedur use elman 's rnn can be effect in design a sequenti control for event-bas type manufactur system . in addit , the simul result assur the effect of the propos control to overcom the effect of noisi input

sequential control
flexible manufacturing systems
recurrent neural network
programmable controller
finite state automata
noisy inputs
Elman network
ladder language
pneumatic system
learning
FMS


Controlled projective synchronization in nonpartially-linear chaotic systems

Abstract: Projective synchronization (PS), in which the state vectors synchronize up to a scaling factor, is usually observable only in partially linear systems. We show that PS could, by means of control, be extended to general classes of chaotic systems with nonpartial linearity. Performance of PS may also be manipulated by controlling the scaling factor to any desired value. In numerical experiments, we illustrate the applications to a Rossler system and a Chua's circuit. The feasibility of the control for high dimensional systems is demonstrated in a hyperchaotic system

control project synchron in nonpartially-linear chaotic system
 project synchron ( ps ) , in which the state vector synchron up to a scale factor , is usual observ onli in partial linear system . we show that ps could , by mean of control , be extend to gener class of chaotic system with nonparti linear . perform of ps may also be manipul by control the scale factor to ani desir valu . in numer experi , we illustr the applic to a rossler system and a chua 's circuit . the feasibl of the control for high dimension system is demonstr in a hyperchaot system

control
projective synchronization
nonpartially-linear chaotic systems
scaling factor
Rossler system
Chua's circuit
hyperchaotic system


An agent-oriented and service-oriented environment for deploying dynamic distributed systems

Abstract: This paper presents JASE, a Java-based Agent-oriented and Service-oriented Environment for deploying dynamic distributed systems. JASE utilizes two important concepts in the field of distributed computing: the concept of services and remote programming with mobile agents. In JASE, mobile agents are used to support applications, and service interface agents are used to wrap services. Service inter-face agents can dynamically register their services in Service Server. Mobile agent locates a specific service interface agent by submitting requests to the Service Server with descriptions of required services. JASE uses XML to describe both service descriptions and the mobile agent's queries. JASE supports two kinds of communication facility: tuple space and asynchronous messages. In this paper, the design and implementation of JASE are described. An application shows the suitability and the effectiveness of the JASE and performance evaluation is also made. Finally, related work and some conclusions are given

an agent-ori and service-ori environ for deploy dynam distribut system
 thi paper present jase , a java-bas agent-ori and service-ori environ for deploy dynam distribut system . jase util two import concept in the field of distribut comput : the concept of servic and remot program with mobil agent . in jase , mobil agent are use to support applic , and servic interfac agent are use to wrap servic . servic inter-fac agent can dynam regist their servic in servic server . mobil agent locat a specif servic interfac agent by submit request to the servic server with descript of requir servic . jase use xml to describ both servic descript and the mobil agent 's queri . jase support two kind of commun facil : tupl space and asynchron messag . in thi paper , the design and implement of jase are describ . an applic show the suitabl and the effect of the jase and perform evalu is also made . final , relat work and some conclus are given

Java-based agent-oriented and service-oriented environment


A knowledge-based approach for managing urban infrastructures

Abstract: This paper presents a knowledge e-based approach dedicated to the efficient management, regulation, interactive and dynamic monitoring of urban infrastructures. This approach identifies the data and related treatments common to several municipal activities and defines the requirements and functionalities of the computer tools developed to improve the delivery and coordination of municipal services to the population. The resulting cooperative system called SIGIU is composed of a set of integrated operating systems (SYDEX) and the global planning and coordination system (SYGEC). The objective is to integrate the set of SYDEX and the SYGEC into a single coherent system for all the SIGIU's users according to their tasks, their roles, and their responsibilities within the municipal administration. SIGIU is provided by different measurement and monitoring instruments installed on some system's elements to be supervised. In this context, the information can be presented in different forms: video, pictures, data and alarms. One of SIGIU's objectives is the real-time management of urban infrastructures' control mechanisms. To carry out this process, the alarm control agent creates a mobile agent associated with the alarm, which is sent to a mobile station and warns an operator. Preliminary implementation results show that SIGIU supports effectively and efficiently the decision making process related to managing urban infrastructures

a knowledge-bas approach for manag urban infrastructur
 thi paper present a knowledg e-bas approach dedic to the effici manag , regul , interact and dynam monitor of urban infrastructur . thi approach identifi the data and relat treatment common to sever municip activ and defin the requir and function of the comput tool develop to improv the deliveri and coordin of municip servic to the popul . the result cooper system call sigiu is compos of a set of integr oper system ( sydex ) and the global plan and coordin system ( sygec ) . the object is to integr the set of sydex and the sygec into a singl coher system for all the sigiu 's user accord to their task , their role , and their respons within the municip administr . sigiu is provid by differ measur and monitor instrument instal on some system 's element to be supervis . in thi context , the inform can be present in differ form : video , pictur , data and alarm . one of sigiu 's object is the real-tim manag of urban infrastructur ' control mechan . to carri out thi process , the alarm control agent creat a mobil agent associ with the alarm , which is sent to a mobil station and warn an oper . preliminari implement result show that sigiu support effect and effici the decis make process relat to manag urban infrastructur

knowledge-based approach
regulation
dynamic monitoring
municipal activities
cooperative system
SIGIU
integrated operating systems
SYDEX
coordination system
SYGEC
video
real-time management
alarm control agent
mobile agent
urban infrastructure management
global planning system
intelligent decision support system
urban planning
multi-agent systems


Reconstruction of MR images from data acquired on an arbitrary k-space trajectory using the same-image weight

Abstract: A sampling density compensation function denoted "same-image (SI) weight" is proposed to reconstruct MR images from the data acquired on an arbitrary k-space trajectory. An equation for the SI weight is established on the SI criterion and an iterative scheme is developed to find the weight. The SI weight is then used to reconstruct images from the data calculated on a random trajectory in a numerical phantom case and from the data acquired on interleaved spirals in an in vivo experiment, respectively. In addition, Pipe and Menon's weight (MRM 1999;41:179-186) is also used in the reconstructions to make a comparison. The images obtained with the SI weight were found to be slightly more accurate than those obtained with Pipe's weight

reconstruct of mr imag from data acquir on an arbitrari k-space trajectori use the same-imag weight
 a sampl densiti compens function denot " same-imag ( si ) weight " is propos to reconstruct mr imag from the data acquir on an arbitrari k-space trajectori . an equat for the si weight is establish on the si criterion and an iter scheme is develop to find the weight . the si weight is then use to reconstruct imag from the data calcul on a random trajectori in a numer phantom case and from the data acquir on interleav spiral in an in vivo experi , respect . in addit , pipe and menon 's weight ( mrm 1999;41:179 - 186 ) is also use in the reconstruct to make a comparison . the imag obtain with the si weight were found to be slightli more accur than those obtain with pipe 's weight

arbitrary k-space trajectory
same-image weight
sampling density compensation
random trajectory
numerical phantom
MRI image reconstruction
spiral trajectory
convolution function
Nyquist sampling conditions
iterative algorithm
weighting function


A building block approach to automated engineering

Abstract: Shenandoah Valley Electric Cooperative (SVEC, Mt. Crawford, Virginia, US) recognized the need to automate engineering functions and create an interactive model of its distribution system in the early 1990s. It had used Milsoft's DA software for more than 10 years to make engineering studies, and had a Landis and Gyr SCADA system and a hybrid load management system for controlling water heater switches. With the development of GIS and facilities management (FM) applications, SVEC decided this should be the basis for an information system that would model its physical plant and interface with its accounting and billing systems. It could add applications such as outage management, staking, line design and metering to use this information and interface with these databases. However, based on SVEC's size it was not feasible to implement a sophisticated and expensive GIS/FM system. Over the past nine years, SVEC has had success with a building block approach, and its customers and employees are realizing the benefits of the automated applications. This building block approach is discussed in this article including the GIS, outage management system, MapViewer and a staking package. The lessons learned and future expansion are discussed

a build block approach to autom engin
 shenandoah valley electr cooper ( svec , mt. crawford , virginia , us ) recogn the need to autom engin function and creat an interact model of it distribut system in the earli 1990 . it had use milsoft 's da softwar for more than 10 year to make engin studi , and had a landi and gyr scada system and a hybrid load manag system for control water heater switch . with the develop of gi and facil manag ( fm ) applic , svec decid thi should be the basi for an inform system that would model it physic plant and interfac with it account and bill system . it could add applic such as outag manag , stake , line design and meter to use thi inform and interfac with these databas . howev , base on svec 's size it wa not feasibl to implement a sophist and expens gi / fm system . over the past nine year , svec ha had success with a build block approach , and it custom and employe are realiz the benefit of the autom applic . thi build block approach is discuss in thi articl includ the gi , outag manag system , mapview and a stake packag . the lesson learn and futur expans are discuss

building block approach
GIS
Shenandoah Valley Electric Cooperative
interactive model
distribution system
billing systems
outage management
staking
line design
metering
databases
MapViewer
engineering functions automation


Applying genetic algorithms to solve the fuzzy optimal profit problem

Abstract: This study investigated the application of genetic algorithms in solving a fuzzy optimization problem that arises in business and economics. In this problem, a fuzzy price is determined using a linear or a quadratic fuzzy demand function as well as a linear cost function. The objective is to find the optimal fuzzy profit, which is derived from the fuzzy price and fuzzy cost. Traditional methods for solving this problem are (1) the extension principle, and (2) using interval arithmetic and alpha -cuts. However, we argue that traditional methods for solving this problem are too restrictive to produce an optimal solution, and that an alternative approach is possibly needed. We use genetic algorithms to obtain an approximate solution for this fuzzy optimal profit problem without using membership functions. We not only give empirical examples to show the effectiveness of this approach, but also give theoretical proofs to validate correctness of the algorithm. We conclude that genetic algorithms can produce good approximate solutions when applied to solve fuzzy optimization problems

appli genet algorithm to solv the fuzzi optim profit problem
 thi studi investig the applic of genet algorithm in solv a fuzzi optim problem that aris in busi and econom . in thi problem , a fuzzi price is determin use a linear or a quadrat fuzzi demand function as well as a linear cost function . the object is to find the optim fuzzi profit , which is deriv from the fuzzi price and fuzzi cost . tradit method for solv thi problem are ( 1 ) the extens principl , and ( 2 ) use interv arithmet and alpha -cut . howev , we argu that tradit method for solv thi problem are too restrict to produc an optim solut , and that an altern approach is possibl need . we use genet algorithm to obtain an approxim solut for thi fuzzi optim profit problem without use membership function . we not onli give empir exampl to show the effect of thi approach , but also give theoret proof to valid correct of the algorithm . we conclud that genet algorithm can produc good approxim solut when appli to solv fuzzi optim problem

genetic algorithms
fuzzy optimal profit problem
fuzzy optimization problem
business
economics
fuzzy price
quadratic fuzzy demand function
linear cost function
approximate solution
theoretical proofs
linear fuzzy demand function
algorithm correctness validation


Robust output feedback model predictive control using off-line linear matrix inequalities

Abstract: A fundamental question about model predictive control (MPC) is its robustness to model uncertainty. In this paper, we present a robust constrained output feedback MPC algorithm that can stabilize plants with both polytopic uncertainty and norm-bound uncertainty. The design procedure involves off-line design of a robust constrained state feedback MPC law and a state estimator using linear matrix inequalities (LMIs). Since we employ an off-line approach for the controller design which gives a sequence of explicit control laws, we are able to analyze the robust stabilizability of the combined control laws and estimator, and by adjusting the design parameters, guarantee robust stability of the closed-loop system in the presence of constraints. The algorithm is illustrated with two examples

robust output feedback model predict control use off-lin linear matrix inequ
 a fundament question about model predict control ( mpc ) is it robust to model uncertainti . in thi paper , we present a robust constrain output feedback mpc algorithm that can stabil plant with both polytop uncertainti and norm-bound uncertainti . the design procedur involv off-lin design of a robust constrain state feedback mpc law and a state estim use linear matrix inequ ( lmi ) . sinc we employ an off-lin approach for the control design which give a sequenc of explicit control law , we are abl to analyz the robust stabiliz of the combin control law and estim , and by adjust the design paramet , guarante robust stabil of the closed-loop system in the presenc of constraint . the algorithm is illustr with two exampl

robust output feedback model predictive control

asymptotically stable invariant ellipsoid


New water management system begins operation at US projects

Abstract: The US Army Corps of Engineers has developed a new automated information system to support its water control management mission. The new system provides a variety of decision support tools, enabling water control managers to acquire, transform, verify, store, display, analyse, and disseminate data and information efficiently and around the clock

new water manag system begin oper at us project
 the us armi corp of engin ha develop a new autom inform system to support it water control manag mission . the new system provid a varieti of decis support tool , enabl water control manag to acquir , transform , verifi , store , display , analys , and dissemin data and inform effici and around the clock

water management system
US projects
US Army Corps of Engineers
automated information system
water control management mission
water control managers
decision support tools
watershed modelling
data dissemination
data acquisition
data storage
data verification
data display
data analysis
data visualization
decision support system
Corps Water Management System


SPTL/BIALL academic law library survey 2000/2001

Abstract: The paper outlines the activities and funding of academic law libraries in the UK and Ireland in the academic year 2000/2001. The figures have been taken from the results of a postal questionnaire undertaken by information services staff at Cardiff University on behalf of BIALL

sptl / biall academ law librari survey 2000/2001
 the paper outlin the activ and fund of academ law librari in the uk and ireland in the academ year 2000/2001 . the figur have been taken from the result of a postal questionnair undertaken by inform servic staff at cardiff univers on behalf of biall

SPTL/BIALL
academic law libraries
survey
funding
UK
Ireland
postal questionnaire
information services
Cardiff University


Kontiki. Shortcuts for content's trip to the edge

Abstract: When electronic files get zapped from one location to another, you probably aren't thinking about the physical distance they must travel-or how that distance might affect the time it takes to get there. But if you work for CDN company Kontiki, this is just about all you think about. Championing a P2P-like "bandwidth harvesting" technology, Kontiki has figured out how to not only quickly distribute content to the "edge" but to utilize a combination of centralized servers and a network of enduser machines to collect, or "harvest," underutilized bandwidth and make redundant file requests more efficient

kontiki . shortcut for content 's trip to the edg
 when electron file get zap from one locat to anoth , you probabl are n't think about the physic distanc they must travel-or how that distanc might affect the time it take to get there . but if you work for cdn compani kontiki , thi is just about all you think about . champion a p2p-like " bandwidth harvest " technolog , kontiki ha figur out how to not onli quickli distribut content to the " edg " but to util a combin of central server and a network of endus machin to collect , or " harvest , " underutil bandwidth and make redund file request more effici

P2P-like bandwidth harvesting technology


Detection of flaws in composites from scattered elastic-wave field using an improved mu GA and a local optimizer

Abstract: An effective technique for flaw detection of composites is proposed. In this technique, the detection problem is formulated as an optimization problem minimizing the difference between the measured and calculated surface displacement response derived from scattered elastic-wave fields. A combined optimization technique using an improved mu GA and a local optimizer is developed to solve the optimization problem so as to obtain the flaw parameters defining flaw configurations. Guidelines for implementing the detection technique, including formulation of the objective function of the optimization problem using different error norms, improvement of mu GA convergence performance, switching from mu GA to local optimizer in the optimization process, and suppression of the effect of noise on detection results, are addressed in detail. Numerical examples are presented to demonstrate the effectiveness and efficiency of the proposed detection technique

detect of flaw in composit from scatter elastic-wav field use an improv mu ga and a local optim
 an effect techniqu for flaw detect of composit is propos . in thi techniqu , the detect problem is formul as an optim problem minim the differ between the measur and calcul surfac displac respons deriv from scatter elastic-wav field . a combin optim techniqu use an improv mu ga and a local optim is develop to solv the optim problem so as to obtain the flaw paramet defin flaw configur . guidelin for implement the detect techniqu , includ formul of the object function of the optim problem use differ error norm , improv of mu ga converg perform , switch from mu ga to local optim in the optim process , and suppress of the effect of nois on detect result , are address in detail . numer exampl are present to demonstr the effect and effici of the propos detect techniqu

composites
scattered elastic-wave field
improved mu GA
local optimizer
flaw detection
optimization problem
surface displacement response
flaw configurations
objective function
error norms
convergence
noise effect suppression


Perspectives on academic vs. industry environments for women in computer science

Abstract: The authors were tenure track faculty members at the Colorado School of Mines and later moved into senior positions at software companies. Both are part of two-career couples as well, and both have two children. In this article, they discuss their impressions and share anecdotes regarding the differing experiences of women and families in these two environments

perspect on academ vs. industri environ for women in comput scienc
 the author were tenur track faculti member at the colorado school of mine and later move into senior posit at softwar compani . both are part of two-car coupl as well , and both have two children . in thi articl , they discuss their impress and share anecdot regard the differ experi of women and famili in these two environ

industry environment
women
computer science
faculty members
software companies
children
academic environments
career
gender gap


Packet promises past & present [IP switching]

Abstract: With the death of the competitive carrier market and the significant slashing of RBOC capex budgets, softswitch vendors have been forced to retrench. Now instead of focusing primarily on limited Internet off-load applications, packet-based softswitches are set to gel around real user needs for services such as voice over IP and IP Centrex

packet promis past & present [ ip switch ]
 with the death of the competit carrier market and the signific slash of rboc capex budget , softswitch vendor have been forc to retrench . now instead of focus primarili on limit internet off-load applic , packet-bas softswitch are set to gel around real user need for servic such as voic over ip and ip centrex

softswitch vendors
voice over IP
IP Centrex


The impact and implementation of XML on business-to-business commerce

Abstract: This paper discusses the impact analysis of the Extensible Markup Language (XML). Each business partner within a supply chain will be allowed to generate its own data exchange format by adopting an XML meta-data management system in the local side. Followed after a brief introduction of the information technology for Business to Customer (B2C) and Business to Business (B2B) Electronic Commerce (EC), the impact of XML on the tomorrow business world is discussed. A real case study for impact analysis on information exchange platform, Microsoft's BizTalk platform which is actually an XML schema builder and the implementation of XML commerce application will provide an interest insight for users' future implementation

the impact and implement of xml on business-to-busi commerc
 thi paper discuss the impact analysi of the extens markup languag ( xml ) . each busi partner within a suppli chain will be allow to gener it own data exchang format by adopt an xml meta-data manag system in the local side . follow after a brief introduct of the inform technolog for busi to custom ( b2c ) and busi to busi ( b2b ) electron commerc ( ec ) , the impact of xml on the tomorrow busi world is discuss . a real case studi for impact analysi on inform exchang platform , microsoft 's biztalk platform which is actual an xml schema builder and the implement of xml commerc applic will provid an interest insight for user ' futur implement

XML
Extensible Markup Language
Business to Customer
Business to Business
electronic commerce
BizTalk
XML schema builder
Electronic Data Interchange
Enterprise Resources Planning


A knowledge-based approach for business process reengineering, SHAMASH

Abstract: We present an overview of SHAMASH, a process modelling tool for business process reengineering. The main features that differentiate it from most current related tools are its ability to define and use organisation standards, functional structure, and develop automatic model simulation and optimisation. SHAMASH is a knowledge-based system, and we include a discussion on how knowledge acquisition takes place. Furthermore, we introduce a high level description of the architecture, the conceptual model, and other important modules of the system

a knowledge-bas approach for busi process reengin , shamash
 we present an overview of shamash , a process model tool for busi process reengin . the main featur that differenti it from most current relat tool are it abil to defin and use organis standard , function structur , and develop automat model simul and optimis . shamash is a knowledge-bas system , and we includ a discuss on how knowledg acquisit take place . furthermor , we introduc a high level descript of the architectur , the conceptu model , and other import modul of the system

knowledge-based approach
business process reengineering
SHAMASH
process modelling tool
organisation standards
functional structure
automatic model simulation
optimisation
knowledge-based system
knowledge acquisition
conceptual model


Scribe: a large-scale and decentralized application-level multicast infrastructure

Abstract: This paper presents Scribe, a scalable application-level multicast infrastructure. Scribe supports large numbers of groups, with a potentially large number of members per group. Scribe is built on top of Pastry, a generic peer-to-peer object location and routing substrate overlayed on the Internet, and leverages Pastry's reliability, self-organization, and locality properties. Pastry is used to create and manage groups and to build efficient multicast trees for the dissemination of messages to each group. Scribe provides best-effort reliability guarantees, and we outline how an application can extend Scribe to provide stronger reliability. Simulation results, based on a realistic network topology model, show that Scribe scales across a wide range of groups and group sizes. Also, it balances the load on the nodes while achieving acceptable delay and link stress when compared with Internet protocol multicast

scribe : a large-scal and decentr application-level multicast infrastructur
 thi paper present scribe , a scalabl application-level multicast infrastructur . scribe support larg number of group , with a potenti larg number of member per group . scribe is built on top of pastri , a gener peer-to-p object locat and rout substrat overlay on the internet , and leverag pastri 's reliabl , self-organ , and local properti . pastri is use to creat and manag group and to build effici multicast tree for the dissemin of messag to each group . scribe provid best-effort reliabl guarante , and we outlin how an applic can extend scribe to provid stronger reliabl . simul result , base on a realist network topolog model , show that scribe scale across a wide rang of group and group size . also , it balanc the load on the node while achiev accept delay and link stress when compar with internet protocol multicast


HEW selects network management software

Abstract: For more than 100 years, Hamburgische Electricitats-Werke AG (HEW) has provided a reliable electricity service to the city of Hamburg, Germany. Today, the company supplies electricity to some 1.7 million inhabitants via 285000 connections. During 1999, the year the energy market was started in Germany, HEW needed to operate and maintain a safe and reliable network cheaply. The development and implementation of a distribution management system (DMS) is key to the success of HEW. HEW's strategy was to obtain efficient new software for network management that also offered a good platform for future applications. Following a pilot and prequalification phase, HEW invited several companies to process the requirements catalog and to submit a detailed tender. The network information management system, Xpower, developed by Tekla Oyj, successfully passed HEW's test program and satisfied all the performance and system capacity requirements. The system met all HEW's conditions by presenting the reality of a network with the attributes of the operating resources. Xpower platform provides the ability to integrate future applications

hew select network manag softwar
 for more than 100 year , hamburgisch electricitats-werk ag ( hew ) ha provid a reliabl electr servic to the citi of hamburg , germani . today , the compani suppli electr to some 1.7 million inhabit via 285000 connect . dure 1999 , the year the energi market wa start in germani , hew need to oper and maintain a safe and reliabl network cheapli . the develop and implement of a distribut manag system ( dm ) is key to the success of hew . hew 's strategi wa to obtain effici new softwar for network manag that also offer a good platform for futur applic . follow a pilot and prequalif phase , hew invit sever compani to process the requir catalog and to submit a detail tender . the network inform manag system , xpower , develop by tekla oyj , success pass hew 's test program and satisfi all the perform and system capac requir . the system met all hew 's condit by present the realiti of a network with the attribut of the oper resourc . xpower platform provid the abil to integr futur applic

network management software
Hamburgische Electricitats-Werke
Hamburg
Germany
distribution management system
Xpower
Tekla Oyj


A new result on the global convergence of Hopfield neural networks

Abstract: In this work, we discuss Hopfield neural networks, investigating their global stability. Some sufficient conditions for a class of Hopfield neural networks to be globally stable and globally exponentially stable are given

a new result on the global converg of hopfield neural network
 in thi work , we discuss hopfield neural network , investig their global stabil . some suffici condit for a class of hopfield neural network to be global stabl and global exponenti stabl are given

Hopfield neural networks
global stability
sufficient conditions
globally exponentially stable networks


A method for geometrical verification of dynamic intensity modulated radiotherapy using a scanning electronic portal imaging device

Abstract: In order to guarantee the safe delivery of dynamic intensity modulated radiotherapy (IMRT), verification of the leaf trajectories during the treatment is necessary. Our aim in this study is to develop a method for on-line verification of leaf trajectories using an electronic portal imaging device with scanning read-out, independent of the multileaf collimator. Examples of such scanning imagers are electronic portal imaging devices (EPIDs) based on liquid-filled ionization chambers and those based on amorphous silicon. Portal images were acquired continuously with a liquid-filled ionization chamber EPID during the delivery, together with the signal of treatment progress that is generated by the accelerator. For each portal image, the prescribed leaf and diaphragm positions were computed from the dynamic prescription and the progress information. Motion distortion effects of the leaves are corrected based on the treatment progress that is recorded for each image row. The aperture formed by the prescribed leaves and diaphragms is used as the reference field edge, while the actual field edge is found using a maximum-gradient edge detector. The errors in leaf and diaphragm position are found from the deviations between the reference field edge and the detected field edge. Earlier measurements of the dynamic EPID response show that the accuracy of the detected field edge is better than 1 mm. To ensure that the verification is independent of inaccuracies in the acquired progress signal, the signal was checked with diode measurements beforehand. The method was tested on three different dynamic prescriptions. Using the described method, we correctly reproduced the distorted field edges. Verifying a single portal image took 0.1 s on an 866 MHz personal computer. Two flaws in the control system of our experimental dynamic multileaf collimator were correctly revealed with our method. First, the errors in leaf position increase with leaf speed, indicating a delay of approximately 0.8 s in the control system. Second, the accuracy of the leaves and diaphragms depends on the direction of motion. In conclusion, the described verification method is suitable for detailed verification of leaf trajectories during dynamic IMRT

a method for geometr verif of dynam intens modul radiotherapi use a scan electron portal imag devic
 in order to guarante the safe deliveri of dynam intens modul radiotherapi ( imrt ) , verif of the leaf trajectori dure the treatment is necessari . our aim in thi studi is to develop a method for on-lin verif of leaf trajectori use an electron portal imag devic with scan read-out , independ of the multileaf collim . exampl of such scan imag are electron portal imag devic ( epid ) base on liquid-fil ioniz chamber and those base on amorph silicon . portal imag were acquir continu with a liquid-fil ioniz chamber epid dure the deliveri , togeth with the signal of treatment progress that is gener by the acceler . for each portal imag , the prescrib leaf and diaphragm posit were comput from the dynam prescript and the progress inform . motion distort effect of the leav are correct base on the treatment progress that is record for each imag row . the apertur form by the prescrib leav and diaphragm is use as the refer field edg , while the actual field edg is found use a maximum-gradi edg detector . the error in leaf and diaphragm posit are found from the deviat between the refer field edg and the detect field edg . earlier measur of the dynam epid respons show that the accuraci of the detect field edg is better than 1 mm . to ensur that the verif is independ of inaccuraci in the acquir progress signal , the signal wa check with diod measur beforehand . the method wa test on three differ dynam prescript . use the describ method , we correctli reproduc the distort field edg . verifi a singl portal imag took 0.1 s on an 866 mhz person comput . two flaw in the control system of our experiment dynam multileaf collim were correctli reveal with our method . first , the error in leaf posit increas with leaf speed , indic a delay of approxim 0.8 s in the control system . second , the accuraci of the leav and diaphragm depend on the direct of motion . in conclus , the describ verif method is suitabl for detail verif of leaf trajectori dure dynam imrt


A new algebraic modelling approach to distributed problem-solving in MAS

Abstract: This paper is devoted to a new algebraic modelling approach to distributed problem-solving in multi-agent systems (MAS), which is featured by a unified framework for describing and treating social behaviors, social dynamics and social intelligence. A conceptual architecture of algebraic modelling is presented. The algebraic modelling of typical social behaviors, social situation and social dynamics is discussed in the context of distributed problem-solving in MAS. The comparison and simulation on distributed task allocations and resource assignments in MAS show more advantages of the algebraic approach than other conventional methods

a new algebra model approach to distribut problem-solv in ma
 thi paper is devot to a new algebra model approach to distribut problem-solv in multi-ag system ( ma ) , which is featur by a unifi framework for describ and treat social behavior , social dynam and social intellig . a conceptu architectur of algebra model is present . the algebra model of typic social behavior , social situat and social dynam is discuss in the context of distribut problem-solv in ma . the comparison and simul on distribut task alloc and resourc assign in ma show more advantag of the algebra approach than other convent method

algebraic modelling approach
distributed problem-solving
multi-agent systems
unified framework
social behaviors
social dynamics
social intelligence
distributed task allocations
resource assignments


Virtual-reality-based multidimensional therapy for the treatment of body image disturbances in binge eating disorders: a preliminary controlled study

Abstract: The main goal of this paper is to preliminarily evaluate the efficacy of a virtual-reality (VR)-based multidimensional approach in the treatment of body image attitudes and related constructs. The female binge eating disorder (BED) patients (n=20), involved in a residential weight control treatment including low-calorie diet (1200 cal/day) and physical training, were randomly assigned either to the multidimensional VR treatment or to psychonutritional groups based on the cognitive-behavior approach. Patients were administered a battery of outcome measures assessing eating disorders symptomathology, attitudes toward food, body dissatisfaction, level of anxiety, motivation for change, level of assertiveness, and general psychiatric symptoms. In the short term, the VR treatment was more effective than the traditional cognitive-behavioral psychonutritional groups in improving the overall psychological state of the patients. In particular, the therapy was more effective in improving body satisfaction, self-efficacy, and motivation for change. No significant differences were found in the reduction of the binge eating behavior. The possibility of inducing a significant change in body image and its associated behaviors using a VR-based short-term therapy can be useful to improve the body satisfaction in traditional weight reduction programs. However, given the nature of this research that does not include a followup study, the obtained results are preliminary only

virtual-reality-bas multidimension therapi for the treatment of bodi imag disturb in bing eat disord : a preliminari control studi
 the main goal of thi paper is to preliminarili evalu the efficaci of a virtual-r ( vr)-base multidimension approach in the treatment of bodi imag attitud and relat construct . the femal bing eat disord ( bed ) patient ( n=20 ) , involv in a residenti weight control treatment includ low-calori diet ( 1200 cal / day ) and physic train , were randomli assign either to the multidimension vr treatment or to psychonutrit group base on the cognitive-behavior approach . patient were administ a batteri of outcom measur assess eat disord symptomatholog , attitud toward food , bodi dissatisfact , level of anxieti , motiv for chang , level of assert , and gener psychiatr symptom . in the short term , the vr treatment wa more effect than the tradit cognitive-behavior psychonutrit group in improv the overal psycholog state of the patient . in particular , the therapi wa more effect in improv bodi satisfact , self-efficaci , and motiv for chang . no signific differ were found in the reduct of the bing eat behavior . the possibl of induc a signific chang in bodi imag and it associ behavior use a vr-base short-term therapi can be use to improv the bodi satisfact in tradit weight reduct program . howev , given the natur of thi research that doe not includ a followup studi , the obtain result are preliminari onli

multidimensional therapy
body image disturbances
binge eating disorders
residential weight control treatment
psychonutritional groups
cognitive-behavior approach
anxiety
psychiatric symptoms
virtual reality
obesity
patient therapy


Flexible air-jet tooling for vibratory bowl feeder systems

Abstract: Vibratory bowl feeders (VBFs) are machines that feed various small parts in large volume automatic assembly systems. Their shortcomings, like inflexibility and the propensity to jam, stem from the use of mechanical orienting devices. Air jet based orienting devices can be implemented to overcome these limitations. Applications of passive and active air jet based orienting devices that replace conventional devices for the VBF are discussed. Passive devices, which reject incorrectly oriented parts, are discussed first. Active air jet based orienting devices are then introduced to further improve the flexibility of VBFs. Since active devices reorient parts into a desired orientation, the part motion under their influence is analyzed. A number of tests demonstrate the feasibility and advantages of these new orienting devices

flexibl air-jet tool for vibratori bowl feeder system
 vibratori bowl feeder ( vbf ) are machin that feed variou small part in larg volum automat assembl system . their shortcom , like inflex and the propens to jam , stem from the use of mechan orient devic . air jet base orient devic can be implement to overcom these limit . applic of passiv and activ air jet base orient devic that replac convent devic for the vbf are discuss . passiv devic , which reject incorrectli orient part , are discuss first . activ air jet base orient devic are then introduc to further improv the flexibl of vbf . sinc activ devic reorient part into a desir orient , the part motion under their influenc is analyz . a number of test demonstr the feasibl and advantag of these new orient devic

vibratory bowl feeders
automatic assembly systems
orienting devices
active air jet
passive air jet
parts feeding


Positional control of pneumatic manipulators for construction tasks

Abstract: This paper describes solutions that can be applied to pneumatic manipulator problems in positioning, both for angle trajectories and for long linear trajectories, used in construction tasks. Optimal positioning of a pneumatic manipulator along angle trajectories with minimum control energy consumption is given. The implementation of the control system is presented. Control algorithms for a long linear trajectory manipulator based on two-phase and three-phase motion modes of the end-effector are investigated. Conventional and fuzzy logic controls of a pneumatic manipulator were applied and experimental testing was carried out. The obtained results allow widening the application range of pneumatic manipulators in construction, particularly in gantry type machines

posit control of pneumat manipul for construct task
 thi paper describ solut that can be appli to pneumat manipul problem in posit , both for angl trajectori and for long linear trajectori , use in construct task . optim posit of a pneumat manipul along angl trajectori with minimum control energi consumpt is given . the implement of the control system is present . control algorithm for a long linear trajectori manipul base on two-phas and three-phas motion mode of the end-effector are investig . convent and fuzzi logic control of a pneumat manipul were appli and experiment test wa carri out . the obtain result allow widen the applic rang of pneumat manipul in construct , particularli in gantri type machin

positioning
positional control
pneumatic manipulators
construction tasks
angle trajectories
long linear trajectory manipulator
three-phase motion modes
fuzzy logic controls
gantry type machines
two-phase motion modes


Computing stationary Nash equilibria of undiscounted single-controller stochastic games

Abstract: Given a two-person, nonzero-sum stochastic game where the second player controls the transitions, we formulate a linear complementarity problem LCP(q, M) whose solution gives a Nash equilibrium pair of stationary strategies under the limiting average payoff criterion. The matrix M constructed is of the copositive class so that Lemke's algorithm will process it. We will also do the same for a special class of N-person stochastic games called polymatrix stochastic games

comput stationari nash equilibria of undiscount single-control stochast game
 given a two-person , nonzero-sum stochast game where the second player control the transit , we formul a linear complementar problem lcp(q , m ) whose solut give a nash equilibrium pair of stationari strategi under the limit averag payoff criterion . the matrix m construct is of the coposit class so that lemk 's algorithm will process it . we will also do the same for a special class of n-person stochast game call polymatrix stochast game


Perfusion quantification using Gaussian process deconvolution

Abstract: The quantification of perfusion using dynamic susceptibility contrast MRI (DSC-MRI) requires deconvolution to obtain the residual impulse response function (IRF). In this work, a method using the Gaussian process for deconvolution (GPD) is proposed. The fact that the IRF is smooth is incorporated as a constraint in the method. The GPD method, which automatically estimates the noise level in each voxel, has the advantage that model parameters are optimized automatically. The GPD is compared to singular value decomposition (SVD) using a common threshold for the singular values, and to SVD using a threshold optimized according to the noise level in each voxel. The comparison is carried out using artificial data as well as data from healthy volunteers. It is shown that GPD is comparable to SVD with a variable optimized threshold when determining the maximum of the IRF, which is directly related to the perfusion. GPD provides a better estimate of the entire IRF. As the signal-to-noise ratio (SNR) increases or the time resolution of the measurements increases, GPD is shown to be superior to SVD. This is also found for large distribution volumes

perfus quantif use gaussian process deconvolut
 the quantif of perfus use dynam suscept contrast mri ( dsc-mri ) requir deconvolut to obtain the residu impuls respons function ( irf ) . in thi work , a method use the gaussian process for deconvolut ( gpd ) is propos . the fact that the irf is smooth is incorpor as a constraint in the method . the gpd method , which automat estim the nois level in each voxel , ha the advantag that model paramet are optim automat . the gpd is compar to singular valu decomposit ( svd ) use a common threshold for the singular valu , and to svd use a threshold optim accord to the nois level in each voxel . the comparison is carri out use artifici data as well as data from healthi volunt . it is shown that gpd is compar to svd with a variabl optim threshold when determin the maximum of the irf , which is directli relat to the perfus . gpd provid a better estim of the entir irf . as the signal-to-nois ratio ( snr ) increas or the time resolut of the measur increas , gpd is shown to be superior to svd . thi is also found for larg distribut volum

perfusion quantification
Gaussian process deconvolution
dynamic susceptibility contrast MRI
residual impulse response function
noise level
singular value decomposition
optimized model parameters
capillary blood flow
mean transit time
optimized joint Gaussian distribution
correlation length
likelihood function


Information needs of the working journalists in Orissa: a study

Abstract: Provides an insight into the various information needs of working journalists in Orissa. Analyses data received from 226 working journalists representing 40 newspaper organisations. Also depicts the specialisation of working journalists, their frequency of information requirement, mode of dissemination preferred, information sources explored, mode of services opted, and their information privations. The study asserts that subjects primarily concerned with the professional work and image of the working journalists are rated utmost significant

inform need of the work journalist in orissa : a studi
 provid an insight into the variou inform need of work journalist in orissa . analys data receiv from 226 work journalist repres 40 newspap organis . also depict the specialis of work journalist , their frequenc of inform requir , mode of dissemin prefer , inform sourc explor , mode of servic opt , and their inform privat . the studi assert that subject primarili concern with the profession work and imag of the work journalist are rate utmost signific

information needs
working journalists
newspaper organisations
information requirement
information sources
professional work
data analysis
information dissemination


Making the MIS integration process work

Abstract: Focused, cross-functional teams that implement flexible and scalable information systems (IS) can deliver a smooth, lean manufacturing process. When integrating new technology into an existing facility, one should always consider three things: the hard infrastructure, the soft infrastructure, and information flow. Hard infrastructure includes client and server hardware and network infrastructure. Soft infrastructure includes operating systems, existing or legacy software, needed code customizations, and the human resources to run/support the system. Information flow includes how data in the new system interacts with legacy systems and what legacy data the new system will require, as well as who will want to receive/access the information that is held by the system

make the mi integr process work
 focus , cross-funct team that implement flexibl and scalabl inform system ( is ) can deliv a smooth , lean manufactur process . when integr new technolog into an exist facil , one should alway consid three thing : the hard infrastructur , the soft infrastructur , and inform flow . hard infrastructur includ client and server hardwar and network infrastructur . soft infrastructur includ oper system , exist or legaci softwar , need code custom , and the human resourc to run / support the system . inform flow includ how data in the new system interact with legaci system and what legaci data the new system will requir , as well as who will want to receiv / access the inform that is held by the system

scalable information systems
lean manufacturing process
information flow
network infrastructure
legacy software
human resources
management information systems
client server hardware


Outsourced backup saves time

Abstract: To increase the efficiency of its data backup and to free staff to concentrate on core business, The Gadget Shop is relying on a secure, automated system hosted by a third party

outsourc backup save time
 to increas the effici of it data backup and to free staff to concentr on core busi , the gadget shop is reli on a secur , autom system host by a third parti

outsourced
data backup
The Gadget Shop
e-business


Scalable secure group communication over IP multicast

Abstract: We introduce and analyze a scalable rekeying scheme for implementing secure group communications Internet protocol multicast. We show that our scheme incurs constant processing, message, and storage overhead for a rekey operation when a single member joins or leaves the group, and logarithmic overhead for bulk simultaneous changes to the group membership. These bounds hold even when group dynamics are not known a priori. Our rekeying algorithm requires a particular clustering of the members of the secure multicast group. We describe a protocol to achieve such clustering and show that it is feasible to efficiently cluster members over realistic Internet-like topologies. We evaluate the overhead of our own rekeying scheme and also of previously published schemes via simulation over an Internet topology map containing over 280 000 routers. Through analysis and detailed simulations, we show that this rekeying scheme performs better than previous schemes for a single change to group membership. Further, for bulk group changes, our algorithm outperforms all previously known schemes by several orders of magnitude in terms of actual bandwidth usage, processing costs, and storage requirements

scalabl secur group commun over ip multicast
 we introduc and analyz a scalabl rekey scheme for implement secur group commun internet protocol multicast . we show that our scheme incur constant process , messag , and storag overhead for a rekey oper when a singl member join or leav the group , and logarithm overhead for bulk simultan chang to the group membership . these bound hold even when group dynam are not known a priori . our rekey algorithm requir a particular cluster of the member of the secur multicast group . we describ a protocol to achiev such cluster and show that it is feasibl to effici cluster member over realist internet-lik topolog . we evalu the overhead of our own rekey scheme and also of previous publish scheme via simul over an internet topolog map contain over 280 000 router . through analysi and detail simul , we show that thi rekey scheme perform better than previou scheme for a singl chang to group membership . further , for bulk group chang , our algorithm outperform all previous known scheme by sever order of magnitud in term of actual bandwidth usag , process cost , and storag requir

scalable secure group communication
IP multicast
Internet protocol multicast
storage overhead
overhead
logarithmic overhead
simulation
group membership
group dynamics
rekeying algorithm
secure multicast group
Internet-like topologies
Internet topology map
bandwidth usage
processing costs
storage requirements
cryptography
access control server
authentication
network routers


Control of a coupled map lattice model for vortex shedding in the wake of a cylinder

Abstract: The flow behind a vibrating flexible cable at low Reynolds numbers can exhibit complex wake structures such as lace-like patterns, vortex dislocations and frequency cells. These structures have been observed in experiments and numerical simulations, and are predicted by a previously developed low-order coupled map lattice (CML). The discrete (in time and space) CML models consist of a series of diffusively coupled circle map oscillators along the cable span. Motivated by a desire to modify the complex wake patterns behind flexible vibrating cables, we have studied the addition of control terms into the highly efficient CML models and explored the resulting dynamics. Proportional, adaptive proportional and discontinuous non-linear (DNL) control methods were used to derive the control laws. The first method employed occasional proportional feedback. The adaptive method used spatio-temporal feedback control. The DNL method used a discontinuous feedback linearization procedure, and the controller was designed for the resulting linearized system using eigenvalue assignment. These techniques were applied to a modeled vortex dislocation structure in the wake of a vibrating cable in uniform freestream flow. Parallel shedding patterns were achieved for a range of forcing frequency-forcing amplitude combinations studied to validate the control theory. The adaptive proportional and DNL methods were found to be more effective than the proportional control method due to the incorporation of a spatially varying feedback gain across the cylinder span. The DNL method was found to be the most efficient controller of the low-order CML model. The required control level across the cable span was correlated to the 1/1 lock-on behavior of the temporal circle map

control of a coupl map lattic model for vortex shed in the wake of a cylind
 the flow behind a vibrat flexibl cabl at low reynold number can exhibit complex wake structur such as lace-lik pattern , vortex disloc and frequenc cell . these structur have been observ in experi and numer simul , and are predict by a previous develop low-ord coupl map lattic ( cml ) . the discret ( in time and space ) cml model consist of a seri of diffus coupl circl map oscil along the cabl span . motiv by a desir to modifi the complex wake pattern behind flexibl vibrat cabl , we have studi the addit of control term into the highli effici cml model and explor the result dynam . proport , adapt proport and discontinu non-linear ( dnl ) control method were use to deriv the control law . the first method employ occasion proport feedback . the adapt method use spatio-tempor feedback control . the dnl method use a discontinu feedback linear procedur , and the control wa design for the result linear system use eigenvalu assign . these techniqu were appli to a model vortex disloc structur in the wake of a vibrat cabl in uniform freestream flow . parallel shed pattern were achiev for a rang of forc frequency-forc amplitud combin studi to valid the control theori . the adapt proport and dnl method were found to be more effect than the proport control method due to the incorpor of a spatial vari feedback gain across the cylind span . the dnl method wa found to be the most effici control of the low-ord cml model . the requir control level across the cabl span wa correl to the 1/1 lock-on behavior of the tempor circl map

coupled map lattice
vortex shedding
wake
cylinder
vibrating flexible cable
low Reynolds numbers
vortex dislocation
vortex dislocation
coupled circle map oscillators
proportional feedback
spatio-temporal feedback control
1/1 lock-on
temporal circle map
discontinuous nonlinear control
vortex dislocations


Successive expansion method of network planning applying symbolic analysis method

Abstract: The conventional power system network successive expansion planning method is discussed in the context of the new paradigm of competitive electric power, energy and service market. In sequel, the paper presents an application of the conceptually new computer program, based on the symbolic analysis of load flows in power system networks. The network parameters and variables are defined as symbols. The symbolic analyzer, which models analytically the power system DC load flows, enables the sensitivity analysis of the power system to parameter and variable variations (costs, transfers, injections), a valuable tool for the expansion planning analysis. That virtue could not be found within the conventional approach, relying on compensation methods, precalculated distribution factors, and so on. This novel application sheds some light on the traditional power system network expansion planning method, as well as on its possible application within the system network expansion planning in the new environment assuming the competitive electric power market

success expans method of network plan appli symbol analysi method
 the convent power system network success expans plan method is discuss in the context of the new paradigm of competit electr power , energi and servic market . in sequel , the paper present an applic of the conceptu new comput program , base on the symbol analysi of load flow in power system network . the network paramet and variabl are defin as symbol . the symbol analyz , which model analyt the power system dc load flow , enabl the sensit analysi of the power system to paramet and variabl variat ( cost , transfer , inject ) , a valuabl tool for the expans plan analysi . that virtu could not be found within the convent approach , reli on compens method , precalcul distribut factor , and so on . thi novel applic shed some light on the tradit power system network expans plan method , as well as on it possibl applic within the system network expans plan in the new environ assum the competit electr power market


Do you see what I see? [visual technology in law firms]

Abstract: Think of how well-done computer presentations can aid in the learning experience. They are, however, less common in client meetings, settlement conferences and the courtroom. And you have to wonder why, when the same benefits of attention focus and visual learning apply in those legal communication settings. The software and hardware components are easy to use, and they're increasingly affordable to boot. The next time you need to convey a point to an audience (be it one person or many), think of how you might benefit from the visual impact available through presentation software like PowerPoint. Anyone will understand you more easily when assisted by visual input, and it may make all the difference in reaching visual-focused learners

do you see what i see ? [ visual technolog in law firm ]
 think of how well-don comput present can aid in the learn experi . they are , howev , less common in client meet , settlement confer and the courtroom . and you have to wonder whi , when the same benefit of attent focu and visual learn appli in those legal commun set . the softwar and hardwar compon are easi to use , and they 're increasingli afford to boot . the next time you need to convey a point to an audienc ( be it one person or mani ) , think of how you might benefit from the visual impact avail through present softwar like powerpoint . anyon will understand you more easili when assist by visual input , and it may make all the differ in reach visual-focus learner

visual technology
law firms
computer presentations
PowerPoint


Non-optimal universal quantum deleting machine

Abstract: We verify the non-existence of some standard universal quantum deleting machine. Then a non-optimal universal quantum deleting machine is constructed and we emphasize the difficulty for improving its fidelity. In a way, our results complement the universal quantum cloning machine established by Buzek and Hillery (1996), and manifest some of their distinctions

non-optim univers quantum delet machin
 we verifi the non-exist of some standard univers quantum delet machin . then a non-optim univers quantum delet machin is construct and we emphas the difficulti for improv it fidel . in a way , our result complement the univers quantum clone machin establish by buzek and hilleri ( 1996 ) , and manifest some of their distinct

nonoptimal universal quantum deleting machine


On the monotonicity conservation in numerical solutions of the heat equation

Abstract: It is important to choose such numerical methods in practice that mirror the characteristic properties of the described process beyond the stability and convergence. The investigated qualitative property in this paper is the conservation of the monotonicity in space of the initial heat distribution. We prove some statements about the monotonicity conservation and total monotonicity of one-step vector-iterations. Then, applying these results, we consider the numerical solutions of the one-dimensional heat equation. Our main theorem formulates the necessary and sufficient condition of the uniform monotonicity conservation. The sharpness of the conditions is demonstrated by numerical examples

on the monoton conserv in numer solut of the heat equat
 it is import to choos such numer method in practic that mirror the characterist properti of the describ process beyond the stabil and converg . the investig qualit properti in thi paper is the conserv of the monoton in space of the initi heat distribut . we prove some statement about the monoton conserv and total monoton of one-step vector-iter . then , appli these result , we consid the numer solut of the one-dimension heat equat . our main theorem formul the necessari and suffici condit of the uniform monoton conserv . the sharp of the condit is demonstr by numer exampl

monotonicity conservation
numerical solutions
heat equation
characteristic properties
qualitative property
one-step vector-iterations
necessary and sufficient condition


Banks pin their back-office hopes on successors to screen scrapers

Abstract: The big name in account aggregation has been Yodlee, based in Redwood Shores, CA. It pioneered the art of screen scraping, or pulling data off Web sites and aggregating it into a single statement. That data, however, is a snapshot and does not include a customer's investment history. Also, because Web sites update data at different times, scraping them can provide an inaccurate picture of a customer's financial situation, making it difficult for reps seeking to provide timely and accurate advice. The objective is to access both fresh and historical data across a client's financial spectrum, from investments to checking accounts and loans to insurance policies, a Complete Customer balance sheet. At least two technology vendors are progressing in that direction, each coming from different directions. One is Advent, based in San Francisco, another is Fincentric, out of Vancouver

bank pin their back-offic hope on successor to screen scraper
 the big name in account aggreg ha been yodle , base in redwood shore , ca . it pioneer the art of screen scrape , or pull data off web site and aggreg it into a singl statement . that data , howev , is a snapshot and doe not includ a custom 's invest histori . also , becaus web site updat data at differ time , scrape them can provid an inaccur pictur of a custom 's financi situat , make it difficult for rep seek to provid time and accur advic . the object is to access both fresh and histor data across a client 's financi spectrum , from invest to check account and loan to insur polici , a complet custom balanc sheet . at least two technolog vendor are progress in that direct , each come from differ direct . one is advent , base in san francisco , anoth is fincentr , out of vancouv

screen scraping
account aggregation
Yodlee
Web sites
investment
checking
loans
insurance
Advent
Fincentric
bankers


An improved fuzzy MCDM model based on ideal and anti-ideal concepts

Abstract: Liang presented (1999) a fuzzy multiple criteria decision making (MCDM) method based on the concepts of ideal and anti-ideal points. Despite its merits, Liang method has the following limitations: (i) the objective criteria are converted into dimensionless indices and the subjective criteria are not converted, which may prevent compatibility for these criteria, (ii) the formulas for converting objective criteria are not reliable, and (iii) an unreliable ranking method, i.e. maximizing set and minimizing set, is applied to rank the fuzzy numbers. This paper applies the Hsu and Chen method and suggests a fuzzy number ranking method to propose an improved fuzzy MCDM model based on ideal and anti-ideal concepts to overcome the shortcomings of the Liang method. Numerical examples demonstrate the effectiveness and feasibility of the proposed ranking method and the improved model, respectively

an improv fuzzi mcdm model base on ideal and anti-id concept
 liang present ( 1999 ) a fuzzi multipl criteria decis make ( mcdm ) method base on the concept of ideal and anti-id point . despit it merit , liang method ha the follow limit : ( i ) the object criteria are convert into dimensionless indic and the subject criteria are not convert , which may prevent compat for these criteria , ( ii ) the formula for convert object criteria are not reliabl , and ( iii ) an unreli rank method , i.e. maxim set and minim set , is appli to rank the fuzzi number . thi paper appli the hsu and chen method and suggest a fuzzi number rank method to propos an improv fuzzi mcdm model base on ideal and anti-id concept to overcom the shortcom of the liang method . numer exampl demonstr the effect and feasibl of the propos rank method and the improv model , respect

fuzzy MCDM model
anti-ideal concepts
dimensionless indices
fuzzy number ranking
ideal concepts
multicriterion decision-making