name stringlengths 7 10 | title stringlengths 13 125 | abstract stringlengths 67 3.02k | fulltext stringclasses 1
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train_628 | Rank tests of association for exchangeable paired data | We describe two rank tests of association for paired exchangeable data motivated by the study of lifespans in twins. The pooled sample is ranked. The nonparametric test of association is based on R/sup +/, the sum of the smaller within-pair ranks. A second measure L/sup +/ is the sum of within-pair rank products. Under... | association;rank tests;twin lifespans;ventilation tube failure time;identical twins;fraternal twins;test statistics;bilateral otitis media;longevity;within-pair rank products;paired exchangeable data;danish twin registry;exact variances;exact means;nonparametric test;within-pair ranks;null hypothesis;within-pair indepe... | |
train_629 | Calibrated initials for an EM applied to recursive models of categorical | variables The estimates from an EM, when it is applied to a large causal model of 10 or more categorical variables, are often subject to the initial values for the estimates. This phenomenon becomes more serious as the model structure becomes more complicated involving more variables. As a measure of compensation for t... | initial values;em;calibrated initials;simulation;recursive models;categorical variables;large causal model | |
train_63 | Geometric source separation: merging convolutive source separation with | geometric beamforming Convolutive blind source separation and adaptive beamforming have a similar goal-extracting a source of interest (or multiple sources) while reducing undesired interferences. A benefit of source separation is that it overcomes the conventional cross-talk or leakage problem of adaptive beamforming.... | geometric source separation;leakage problem;adaptive beamforming;geometric linear constraints;frequency permutations;blind algorithms;room recordings;sensors;degrees of freedom;cross-talk;second-order source separation;cross-power minimization;convolutive blind source separation;acoustic sources;geometric beamforming | |
train_630 | Score tests for zero-inflated Poisson models | In many situations count data have a large proportion of zeros and the zero-inflated Poisson regression (ZIP) model may be appropriate. A simple score test for zero-inflation, comparing the ZIP model with a constant proportion of excess zeros to a standard Poisson regression model, was given by van den Broek (1995). We... | composite test;score tests;zero-inflated poisson regression model;count data;excess zeros;simulation;covariates;zero probability | |
train_631 | A modified Fieller interval for the interval estimation of effective doses for | a logistic dose-response curve Interval estimation of the gamma % effective dose ( mu /sub gamma / say) is often based on the asymptotic variance of the maximum likelihood estimator (delta interval) or Fieller's theorem (Fieller interval). Sitter and Wu (1993) compared the delta and Fieller intervals for the median eff... | effective doses;logistic dose-response curve;median effective dose;asymptotic variance;modified fieller interval;maximum likelihood estimator;interval estimation;delta interval;fieller's theorem | |
train_632 | Modelling dependencies in paired comparison data a log-linear approach | In many Bradley-Terry models a more or less explicit assumption is that all decisions of the judges are independent. An assumption which might be questionable at least for the decisions of a given judge. In paired comparison studies, a judge chooses among objects several times, and in such cases, judgements made by the... | bradley-terry model;multiple binomial responses;paired comparison data dependency modelling;generalized linear models;glim;goodness of fit;conditional odds ratios;log-linear approach;parameter estimation;judge decisions | |
train_633 | Using k-nearest-neighbor classification in the leaves of a tree | We construct a hybrid (composite) classifier by combining two classifiers in common use - classification trees and k-nearest-neighbor (k-NN). In our scheme we divide the feature space up by a classification tree, and then classify test set items using the k-NN rule just among those training items in the same leaf as th... | data sets;feature space division;classification trees;k-nn rule;tree leaves;computational load;hybrid composite classifier;k-nearest-neighbor classification | |
train_634 | An approximation to the F distribution using the chi-square distribution | For the cumulative distribution function (c.d.f.) of the F distribution, F(x; k, n), with associated degrees of freedom, k and n, a shrinking factor approximation (SFA), G( lambda kx; k), is proposed for large n and any fixed k, where G(x; k) is the chi-square c.d.f. with degrees of freedom, k, and lambda = lambda (kx;... | cumulative distribution function;f distribution;chi-square distribution;degrees of freedom;numerical analysis;shrinking factor approximation | |
train_635 | Detection and estimation of abrupt changes in the variability of a process | Detection of change-points in normal means is a well-studied problem. The parallel problem of detecting changes in variance has had less attention. The form of the generalized likelihood ratio test statistic has long been known, but its null distribution resisted exact analysis. In this paper, we formulate the change-p... | process variability;distribution;generalized likelihood ratio test statistic;lower bounds;noninteger degrees of freedom;sequence;deep level gold mine;non null case;individual observations;abrupt change detection;quality control;upper bounds;medical data;conservative bounds;confidence intervals;ambulatory monitoring;odd... | |
train_636 | FLID-DL: congestion control for layered multicast | We describe fair layered increase/decrease with dynamic layering (FLID-DL): a new multirate congestion control algorithm for layered multicast sessions. FLID-DL generalizes the receiver-driven layered congestion control protocol (RLC) introduced by Vicisano et al. (Proc. IEEE INFOCOM, San Francisco, CA, , p.996-1003, M... | multicast layers;flid-dl;fair layered increase/decrease with dynamic layering;internet protocol multicast;layered multicast sessions;congestion control;dynamic layering;simulations;throughput;multirate congestion control algorithm;transmission control protocol;sender-initiated synchronization;tcp fairness;internet grou... | |
train_637 | A digital fountain approach to asynchronous reliable multicast | The proliferation of applications that must reliably distribute large, rich content to a vast number of autonomous receivers motivates the design of new multicast and broadcast protocols. We describe an ideal, fully scalable protocol for these applications that we call a digital fountain. A digital fountain allows any ... | bulk data distribution;high loss rates;erasure codes;rs codes;multicast protocol;experimental system performance;tornado codes;scalable protocol;forward error correction;optimal efficiency;asynchronous reliable multicast;content distribution methods;internet;interoperability;ip multicast;autonomous receivers;large bloc... | |
train_638 | Scalable secure group communication over IP multicast | 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 simultan... | storage requirements;scalable secure group communication;internet topology map;ip multicast;secure multicast group;network routers;authentication;overhead;group dynamics;simulation;internet protocol multicast;cryptography;storage overhead;bandwidth usage;logarithmic overhead;processing costs;rekeying algorithm;group me... | |
train_639 | Distributed servers approach for large-scale secure multicast | In order to offer backward and forward secrecy for multicast applications (i.e., a new member cannot decrypt the multicast data sent before its joining and a former member cannot decrypt the data sent after its leaving), the data encryption key has to be changed whenever a user joins or leaves the system. Such a change... | key management;data encryption key;forward secrecy;short holding time;backward secrecy;hierarchical key tree;distributed servers;large-scale secure multicast;user traffic;system bandwidth;system complexity;multicast applications;internet stock quote applications;re-key messaging;dynamic split-and-merge scheme;traffic m... | |
train_64 | Speech enhancement using a mixture-maximum model | We present a spectral domain, speech enhancement algorithm. The new algorithm is based on a mixture model for the short time spectrum of the clean speech signal, and on a maximum assumption in the production of the noisy speech spectrum. In the past this model was used in the context of noise robust speech recognition.... | dual codebook;tied variances;recorded speech signals;mixmax model;speech intelligibility;clean speech signal;speech enhancement algorithm;noise robust speech recognition;speech signal quality;gaussian mixture model;mixture-maximum model;spectral domain;noisy speech spectrum;additive noise;mixture model;short time spect... | |
train_640 | Scribe: a large-scale and decentralized application-level multicast | infrastructure 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 l... | locality properties;network nodes;internet;scalable application-level multicast infrastructure;decentralized application-level multicast infrastructure;self-organization;internet protocol multicast;simulation results;generic peer-to-peer object location;pastry;scribe;discrete event simulator;group size;best-effort reli... | |
train_641 | Multiecho segmented EPI with z-shimmed background gradient compensation | (MESBAC) pulse sequence for fMRI A MultiEcho Segmented EPI with z-shimmed BAckground gradient Compensation (MESBAC) pulse sequence is proposed and validated for functional MRI (fMRI) study in regions suffering from severe susceptibility artifacts. This sequence provides an effective tradeoff between spatial and tempora... | severe susceptibility artifacts;z-shimmed background gradient compensation;image distortion;bold-weighted signal;multiecho segmented epi;event-related functional brain mapping;fmri;gradient compensation pulse sequence;ghost artifacts;signal dropout;navigator echoes;spatial resolution;temporal resolution;orbitofrontal c... | |
train_642 | Reconstruction of MR images from data acquired on an arbitrary k-space | trajectory using the same-image weight 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 t... | nyquist sampling conditions;same-image weight;arbitrary k-space trajectory;iterative algorithm;random trajectory;weighting function;sampling density compensation;mri image reconstruction;numerical phantom;spiral trajectory;convolution function | |
train_643 | Time-resolved contrast-enhanced imaging with isotropic resolution and broad | coverage using an undersampled 3D projection trajectory Time-resolved contrast-enhanced 3D MR angiography (MRA) methods have gained in popularity but are still limited by the tradeoff between spatial and temporal resolution. A method is presented that greatly reduces this tradeoff by employing undersampled 3D projectio... | image artifacts;isotropic field of view;pulmonary vasculature;3d mri angiography;isotropic resolution;breath-hold imaging;broad coverage;variable density k-space sampling;thorax;undersampled 3d projection trajectory;abdomen;time-resolved contrast-enhanced imaging;temporal k-space interpolation;bolus passage | |
train_644 | Three-dimensional spiral MR imaging: application to renal multiphase | contrast-enhanced angiography A fast MR pulse sequence with spiral in-plane readout and conventional 3D partition encoding was developed for multiphase contrast-enhanced magnetic resonance angiography (CE-MRA) of the renal vasculature. Compared to a standard multiphase 3D CE-MRA with FLASH readout, an isotropic in-plan... | renal multiphase contrast-enhanced angiography;flash sequence;spiral in-plane readout;3d partition encoding;fast pulse sequence;flow artifacts;image reconstruction;image quality;deblurring;3d spiral mri;spatial resolution;off-resonance frequencies;reduced contrast-to-noise ratio;renal vasculature | |
train_645 | Oxygen-enhanced MRI of the brain | Blood oxygenation level-dependent (BOLD) contrast MRI is a potential method for a physiological characterization of tissue beyond mere morphological representation. The purpose of this study was to develop evaluation techniques for such examinations using a hyperoxia challenge. Administration of pure oxygen was applied... | venous reaction;correlation analysis;normal air breathing;significance threshold;functional imaging;physiological response function;fourier transform analysis;mri contrast agent;oxygen-enhanced mri;oxygen breathing;paradigm complexity;bold contrast mri;brain;hyperoxia | |
train_646 | Vibration control of structure by using tuned mass damper (development of | system which suppress displacement of auxiliary mass) In vibration control of a structure by using an active tuned mass damper (ATMD), stroke of the auxiliary mass is so limited that it is difficult to control the vibration in the case of large disturbance input. In this paper, two methods are proposed for the problem.... | auxiliary mass displacement suppression;vibration control;actuator;active control;brake system;controllers;variable gain control system;tuned mass damper | |
train_647 | Experimental design methodology and data analysis technique applied to optimise | an organic synthesis The study was aimed at maximising the yield of a Michaelis-Becker dibromoalkane monophosphorylation reaction. In order to save time and money, we first applied a full factorial experimental design to search for the optimum conditions while performing a small number of experiments. We then used the ... | maximum-yield experimental conditions;principal component analysis;full factorial experimental design;uncontrolled factors;organic synthesis;optimum conditions;michaelis-becker dibromoalkane monophosphorylation reaction;data analysis technique | |
train_648 | Study of ambiguities inherent to the spectral analysis of Voigt profiles-a | modified Simplex approach In pulsed spectrometries, temporal transients are often analyzed directly in the temporal domain, assuming they consist only of purely exponentially decaying sinusoids. When experimental spectra actually consist of Gaussian or Voigt profiles (Gauss-Lorentz profiles), we show that the direct me... | nelder and mead simplex method;gauss-lorentz profiles;voigt profiles;gaussian profiles;accuracy;pulsed spectrometries;temporal transients;final peak parameters;limited acquisition time interval;spectral analysis | |
train_649 | Methods for outlier detection in prediction | If a prediction sample is different from the calibration samples, it can be considered as an outlier in prediction. In this work, two techniques, the use of uncertainty estimation and the convex hull method are studied to detect such prediction outliers. Classical techniques (Mahalanobis distance and X-residuals), pote... | outlier detection;uncertainty estimation;inliers;mahalanobis distance;calibration samples;robust techniques;convex hull method;x-residuals;prediction sample;potential functions | |
train_65 | The use of subtypes and stereotypes in the UML model | Based on users' experiences of Version 1.3 of the Unified Modeling Language (UML) of the Object Management Group (OMG), a Request For Information in 1999 elicited several responses which were asked to identify "problems" but not to offer any solutions. One of these responses is examined for "problems" relating to the U... | stereotypes;whole part relationship;classifier;uml model;object management group;unified modeling language;subtypes;request for information | |
train_650 | Molecular descriptor selection combining genetic algorithms and fuzzy logic: | application to database mining procedures A new algorithm, devoted to molecular descriptor selection in the context of data mining problems, has been developed. This algorithm is based on the concepts of genetic algorithms (GA) for descriptor hyperspace exploration and combined with a stepwise approach to get local con... | data mining;molecular descriptor selection;local convergence;fuzzy clustering method;bullseye;database mining;olfactory compounds;fitness function;genetic algorithms;fitness score;training sets;descriptor hyperspace exploration;test sets;odor categories;fuzzy logic;stepwise approach | |
train_651 | Application-layer multicasting with Delaunay triangulation overlays | Application-layer multicast supports group applications without the need for a network-layer multicast protocol. Here, applications arrange themselves in a logical overlay network and transfer data within the overlay. We present an application-layer multicast solution that uses a Delaunay triangulation as an overlay ne... | network nodes;application-layer multicasting;overlay networks;average overhead;2 mbit/s;delaunay triangulation overlays;group applications;traffic measurements;data transfer;local pc cluster;15 mbit/s;network-layer multicast protocol;data link layer;logical overlay network;next-hop routing information;multicast transmi... | |
train_652 | A case for end system multicast | The conventional wisdom has been that Internet protocol (IP) is the natural protocol layer for implementing multicast related functionality. However, more than a decade after its initial proposal, IP multicast is still plagued with concerns pertaining to scalability, network management, deployment, and support for high... | protocol layer;internet protocol;end system multicast;distributed protocol;higher layer functionality;overlay structure;network dynamics;end-to-end delays;internet experiments;congestion control;packet replication;performance penalties;ip multicast;narada protocol;network management;application level performance;networ... | |
train_653 | Indexing-neglected and poorly understood | The growth of the Internet has highlighted the use of machine indexing. The difficulties in using the Internet as a searching device can be frustrating. The use of the term "python" is given as an example. Machine indexing is noted as "rotten" and human indexing as "capricious." The problem seems to be a lack of a theo... | index terms;machine indexing;internet;searching;human indexing | |
train_654 | A question of perspective: assigning Library of Congress subject headings to | classical literature and ancient history This article explains the concept of world view and shows how the world view of cataloguers influences the development and assignment of subject headings to works about other cultures and civilizations, using works from classical literature and ancient history as examples. Catal... | library of congress subject heading assignment;world view;cultures;ancient greece;civilizations;ancient history;classical literature;ancient rome | |
train_655 | Mapping CCF to MARC21: an experimental approach | The purpose of this article is to raise and address a number of issues pertaining to the conversion of Common Communication Format (CCF) into MARC21. In this era of global resource sharing, exchange of bibliographic records from one system to another is imperative in today's library communities. Instead of using a sing... | india;southeast asia;common communication format conversion;global resource sharing;library communities;marc21;bibliographic records exchange;data transfer;ccf to marc21 mapping;machine-readable catalogue records;standards | |
train_656 | The cataloger's workstation revisited: utilizing Cataloger's Desktop | A few years into the development of Cataloger's Desktop, an electronic cataloging tool aggregator available through the Library of Congress, is an opportune time to assess its impact on cataloging operations. A search for online cataloging tools on the Internet indicates a proliferation of cataloging tool aggregators; ... | internet;cataloging tool aggregators;online documentation;online cataloging tools;staff training;large public libraries;documentation;cataloger's workstation;managing technical issues;cataloger's desktop;academic arl;electronic cataloging tool | |
train_657 | The web services agenda | Even the most battle-scarred of CIOs have become excited at the prospect of what web services can do for their businesses. But there are still some shortcomings to be addressed | transaction support;security;web services | |
train_658 | Process pioneers [agile business] | By managing IT infrastructures along so-called 'top down' lines, organisations can streamline their business processes, eliminate redundant tasks and increase automation | managing it infrastructures;increase automation;business processes;agile business | |
train_659 | Integration - no longer a barrier? [agile business] | Web services will be a critical technology for enabling the 'agile business' | agile business;amr research;iona;integration middleware;web services | |
train_66 | Regression testing of database applications | Database applications features such as Structured Query Language or SQL, exception programming, integrity constraints, and table triggers pose difficulties for maintenance activities; especially for regression testing that follows modifications to database applications. In this work, we address these difficulties and p... | call graph firewall algorithm;data flow analysis;impact analysis;integrity constraints;database applications;table triggers;sql;structured query language;reduction algorithms;control flow graph;exception programming;control flow analysis;two phase regression testing methodology;graph walk algorithm | |
train_660 | At your service [agile businesses] | Senior software executives from three of the world's leading software companies, and one smaller, entrepreneurial software developer, explain the impact that web services, business process management and integrated application architectures are having on their product development plans, and share their vision of the ro... | integrated application architectures;agile businesses;business process management;software companies;web services | |
train_661 | All change [agile business] | What does it take for an organisation to become an agile business? Its employees probably need to adhere to new procurement policies, work more closely with colleagues in other departments, meet more exacting sales targets, and offer higher standards of customer service and support. In short, they need to change the wa... | corporate transformation;agile business;organisational change | |
train_663 | The road ahead [supply chains] | Executive supply chain managers, says David Metcalfe of Forrester Research, need the skills and precision of Mongolian archers on horseback. They must be able to hit their target, in this case customer demand, while moving at great speed. But what is wrong with the supply chains companies have in place already? Accordi... | business networks;forrester research;supply chains;survey;manufacturing | |
train_664 | The agile revolution [business agility] | There is a new business revolution in the air. The theory is there, the technology is evolving, fast. It is all about agility | software deployment;supply chains;software design;organisational structures;business agility | |
train_67 | Metaschemas for ER, ORM and UML data models: a comparison | This paper provides metaschemas for some of the main database modeling notations used in industry. Two Entity Relationship (ER) notations (Information Engineering and Barker) are examined in detail, as well as Object Role Modeling (ORM) conceptual schema diagrams. The discussion of optionality, cardinality and multipli... | barker notation;optionality;data models;information engineering;language transparency;class diagrams;metaschemas;entity relationship modeling;uml;orthogonality;cardinality;database modeling notations;normalization;object role modeling;unified modeling language;conceptual schema diagrams;multiplicity;orm | |
train_671 | Expert advice - how can my organisation take advantage of reverse auctions | without jeopardising existing supplier relationships? In a recent survey, AMR Research found that companies that use reverse auctions to negotiate prices with suppliers typically achieve savings of between 10% and 15% on direct goods and between 20% and 25% on indirect goods, and can slash sourcing cycle times from mon... | reverse auctions;preparation;request for quotation;supplier relationships | |
train_673 | The Information Age interview - Capital One | Credit card company Capital One attributes its rapid customer growth to the innovative use of cutting-edge technology. European CIO Catherine Doran talks about the systems that have fuelled that runaway success | cutting-edge technology;customer growth;capital one;credit card company | |
train_674 | Portal payback | The benefits of deploying a corporate portal are well-documented: access to applications and content is centralised, so users do not spend hours searching for information; the management of disparate applications is also centralised, and by allowing users to access 'self-service' applications in areas such as human res... | web sites;metrics;return on investment;roi calculator;corporate portal | |
train_675 | Application foundations [application servers] | The changing role of application servers means choosing the right platform has become a complex challenge | microsoft .net;java 2 enterprise edition;security;load balancing;availability;application servers;transaction processing | |
train_676 | Impossible choice [web hosting service provider] | Selecting a telecoms and web hosting service provider has become a high-stakes game of chance | customer service;web hosting service provider;it managers;selection | |
train_677 | Acts to facts catalogue | The paper shows a way to satisfy users' changing and specific information needs by providing the modified format-author-collaborators-title-series-subject (FACTS). catalogue instead of the traditional author-collaborator-title-series-subjects (ACTS) catalogue | author-collaborator-title-series-subjects catalogue;information needs;format-author-collaborators-title-series-subject catalogue | |
train_678 | Marketing in CSIR libraries and information centres: a study on promotional | efforts This paper examines the attitudes of librarians towards the promotional aspects in several CSIR libraries and information centres of India. The issues related to promotional activities of these libraries have been evaluated to determine the extent to which they are being practised. Librarians hold positive atti... | india;csir libraries;marketing;promotional activities;information needs;information centres | |
train_679 | Himalayan information system: a proposed model | The information explosion and the development in information technology force us to develop information systems in various fields. The research on Himalaya has achieved phenomenal growth in recent years in India. The information requirements of Himalayan researchers are divergent in nature. In order to meet these diver... | himalayan information system model;india;information technology;himis;government;information explosion;information network;information requirements | |
train_68 | Human factors research on data modeling: a review of prior research, an | extended framework and future research directions This study reviews and synthesizes human factors research on conceptual data modeling. In addition to analyzing the variables used in earlier studies and summarizing the results of this stream of research, we propose a new framework to help with future efforts in this a... | conceptual data modeling;analyst developer models;database;user-analyst models;future efforts;human factors | |
train_680 | Information needs of the working journalists in Orissa: a study | 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, infor... | information requirement;working journalists;information sources;data analysis;professional work;information dissemination;newspaper organisations;information needs | |
train_681 | Construction of information retrieval thesaurus for family planning terms using | CDS/ISIS The thesaurus as a tool for information retrieval and as an alternative to the existing scheme of classifications in information retrieval is discussed. The paper considers the emergence of the information retrieval thesaurus and its definition. Family planning is a multidisciplinary subject covering socio eco... | culture;classification;medicine;thesaurus;family planning;socio economic field;bs 5723;bibliographic databases;psychology;iso 2788;family planning terms;cds/isis software;information retrieval;unisist | |
train_682 | Information and information technology | This paper reveals the concepts of information and information technology. It also describes the close relationship between information and information technology. It explains a basic mechanism of different devices of information technology and connotes how they are useful to store, process and retrieve the information... | information technology;information processing;indian universities;information retrieval;information;information storage | |
train_683 | Knowledge management | The article defines knowledge management, discusses its role, and describes its functions. It also explains the principles of knowledge management, enumerates the strategies involved in knowledge management, and traces its history in brief. The focus is on its interdisciplinary nature. The steps involved in knowledge m... | knowledge management | |
train_684 | Individual decision making using fuzzy set theory | The paper shows the importance of decision making by an individual and highlights the prime domain of decision making where fuzzy set theory can be used as a tool. Fuzzy set theory has been used on rational model of decision making to arrive at the desired conclusion | individual decision making;fuzzy set theory;rational decision making model | |
train_685 | Robotically enhanced placement of left ventricular epicardial electrodes during | implantation of a biventricular implantable cardioverter defibrillator system Biventricular pacing has gained increasing acceptance in advanced heart failure patients. One major limitation of this therapy is positioning the left ventricular stimulation lead via the coronary sinus. This report demonstrates the feasibili... | davinci surgical system;left ventricular epicardial electrodes;advanced heart failure patients;biventricular implantable cardioverter defibrillator system implantation;left ventricular stimulation lead positioning;coronary sinus;epicardial leads;totally endoscopic direct placement;left ventricular pacing | |
train_686 | Technology CAD of SiGe-heterojunction field effect transistors | A 2D virtual wafer fabrication simulation suite has been employed for the technology CAD of SiGe channel heterojunction field effect transistors (HFETs). Complete fabrication process of SiGe p-HFETs has been simulated. The SiGe material parameters and mobility model were incorporated to simulate Si/SiGe p-HFETs with a ... | uniform channel;mobility model;material parameters;technology cad;fabrication process;0.5 micron;sige;linear transconductance;heterojunction field effect transistors | |
train_687 | Image reconstruction of simulated specimens using convolution back projection | This paper reports the reconstruction of cross-sections of composite structures. The convolution back projection (CBP) algorithm has been used to capture the attenuation field over the specimen. Five different test cases have been taken up for evaluation. These cases represent varying degrees of complexity. In addition... | reconstruction errors;simulated specimens;composite structures;engineering applications;convolution back projection;image reconstruction;filters;attenuation field;computerised tomography;composite regions;cbp algorithm | |
train_688 | Active vibration control of piezolaminated smart beams | This paper deals with the active vibration control of beam like structures with distributed piezoelectric sensor and actuator layers bonded on top and bottom surfaces of the beam. A finite element model based on Euler-Bernoulli beam theory has been developed. The contribution of the piezoelectric sensor and actuator la... | stiffness;top surfaces;lyapunov feedback;impulse loading;constant-gain negative velocity feedback;optimal control strategy;random loading;distributed piezoelectric actuator layers;control effectiveness;bottom surfaces;step loading;piezolaminated smart beams;euler-bernoulli beam theory;mass;beam like structures;active v... | |
train_689 | Continuous-time linear systems: folklore and fact | We consider a family of continuous input-output maps representing linear time-invariant systems that take a set of signals into itself. It is shown that this family contains maps whose impulse response is the zero function, but which take certain inputs into nonzero outputs. It is shown also that this family contains m... | continuous input-output maps;commutation;frequency domain response;time-invariant systems;impulse response;linear systems;continuous-time systems;signal processing;zero function | |
train_69 | Sensitivity calibration of ultrasonic detectors based using ADD diagrams | The paper considers basic problems related to utilization of ADD diagrams in calibrating sensitivity of ultrasonic detectors. We suggest that a convenient tool for solving such problems can be the software package ADD Universal. Version 2.1 designed for plotting individual ADD diagrams for normal and slanted transducer... | sensitivity calibration;calibration;software package;add diagrams;contemporary operational system windows-95(98;ultrasonic testing;normal transducers;ultrasonic detectors;slanted transducers;reference signals;cylindrical holes | |
train_690 | Robust Kalman filter design for discrete time-delay systems | The problem of finite- and infinite-horizon robust Kalman filtering for uncertain discrete-time systems with state delay is addressed. The system under consideration is subject to time-varying norm-bounded parameter uncertainty in both the state and output matrices. We develop a new methodology for designing a linear f... | robust kalman filter;norm-bounded parameter uncertainty;riccati equations;time-varying parameter uncertainty;state matrices;linear filter;discrete time-delay systems;output matrices;state delay;uncertain systems;robust state estimation | |
train_691 | Robust output-feedback control for linear continuous uncertain state delayed | systems with unknown time delay The state-delayed time often is unknown and independent of other variables in most real physical systems. A new stability criterion for uncertain systems with a state time-varying delay is proposed. Then, a robust observer-based control law based on this criterion is constructed via the ... | time delay;closed-loop system stability;state feedback control law;output-feedback control;linear continuous systems;observer-based control law;sequential quadratic programming;robust control;uncertain systems;state time-varying delay;state delayed systems | |
train_692 | A partial converse to Hadamard's theorem on homeomorphisms | A theorem by Hadamard gives a two-part condition under which a map from one Banach space to another is a homeomorphism. The theorem, while often very useful, is incomplete in the sense that it does not explicitly specify the family of maps for which the condition is met. Here, under a typically weak additional assumpti... | banach space;lipschitz continuous inverse;nonlinear networks;partial converse;homeomorphisms;hadamard theorem;linear system stability;linearization;nonlinear feedback systems;nonlinear system stability | |
train_693 | Lifting factorization of discrete W transform | A general method is proposed to factor the type-IV discrete W transform (DWT-IV) into lifting steps and additions. Then, based on the relationships among various types of DWTs, four types of DWTs are factored into lifting steps and additions. After approximating the lifting matrices, we get four types of new integer DW... | lifting factorization;lossless coding schemes;dwt;lifting matrices;mobile computing;filter bank;feature extraction;integer arithmetic;multiframe detection;mobile devices;data compression;computational complexity;discrete wavelet transform;integer transforms | |
train_694 | A novel genetic algorithm for the design of a signed power-of-two coefficient | quadrature mirror filter lattice filter bank A novel genetic algorithm (GA) for the design of a canonical signed power-of-two (SPT) coefficient lattice structure quadrature mirror filter bank is presented. Genetic operations may render the SPT representation of a value noncanonical. A new encoding scheme is introduced ... | chromosome codon;lattice filter bank;natural selection;quadrature mirror filter;offspring survival rate;genetic algorithm;qmf;perfect reconstruction;signed power-of-two coefficient lattice structure;signal processing;encoding scheme | |
train_695 | Design of high-performance wavelets for image coding using a perceptual time | domain criterion This paper presents a new biorthogonal linear-phase wavelet design for image compression. Instead of calculating the prototype filters as spectral factors of a half-band filter, the design is based on the direct optimization of the low pass analysis filter using an objective function directly related t... | high-performance wavelets;prototype filters;image compression;objective function;perceptual time domain criterion;peak-to-peak ratio;filter banks;biorthogonal linear-phase wavelet design;low pass filter;half-band filter;image coding;perceptual image quality;coding gain;analysis filter | |
train_696 | Design and implementation of a new sliding-mode observer for speed-sensorless | control of induction machine In this letter, a new sliding-mode-sensorless control algorithm is proposed for the field-oriented induction machine drive. In the proposed algorithm, the terms containing flux, speed, and rotor time constant, which are common in both current and flux equations, in the current model of the ... | induction motor drive;flux;speed-sensorless control;induction machine;sliding-mode observer;sensorless control;rotor time constant;current equations;flux equations;fourth-order system reduction;parameter uncertainties;speed estimation accuracy;sliding function;current model;speed | |
train_697 | Schedulability analysis of real-time traffic in WorldFIP networks: an | integrated approach The WorldFIP protocol is one of the profiles that constitute the European fieldbus standard EN-50170. It is particularly well suited to be used in distributed computer-controlled systems where a set of process variables must be shared among network devices. To cope with the real-time requirements of... | communication services;distributed computer-controlled systems;aperiodic exchanges;real-time traffic schedulability analysis;periodic process variables;first-come-first-served policy;response time;en-50170 european fieldbus standard;traffic online admission control;scheduling algorithms;worldfip networks;real-time comm... | |
train_698 | Robust stability analysis for current-programmed regulators | Uncertainty models for the three basic switch-mode converters: buck, boost, and buck-boost are given in this paper. The resulting models are represented by linear fractional transformations with structured dynamic uncertainties. Uncertainties are assumed for the load resistance R=R/sub O/(1+ delta /sub R/), inductance ... | buck-boost converters;capacitance;load resistance;switch-mode dc-dc converters;boost converters;buck converters;current-programmed regulators;uncertainty models;linear fractional transformations;robust stability analysis;nominal model;inductance;control analysis;structured dynamic uncertainties;norm-bounded modeling un... | |
train_699 | Novel line conditioner with voltage up/down capability | In this paper, a novel pulsewidth-modulated line conditioner with fast output voltage control is proposed. The line conditioner is made up of an AC chopper with reversible voltage control and a transformer for series voltage compensation. In the AC chopper, a proper switching operation is achieved without the commutati... | output voltage control;ac chopper;switching operation;commutation;regenerative dc snubber;pulsewidth-modulated line conditioner;dynamic performance;steady-state performance;reversible voltage control;series voltage compensation transformer;line stray inductance | |
train_7 | Anti-spam suit attempts to hold carriers accountable | A lawsuit alleges that Sprint has violated Utah's new anti-spam act. The action could open the door to new regulations on telecom service providers | lawsuit;anti-spam act;regulations;telecom service providers;sprint | |
train_70 | IT security issues: the need for end user oriented research | Considerable attention has been given to the technical and policy issues involved with IT security issues in recent years. The growth of e-commerce and the Internet, as well as widely publicized hacker attacks, have brought IT security into prominent focus and routine corporate attention. Yet, much more research is nee... | internet;information technology research;hacker attacks;it security;end user oriented research;end user computing;e-commerce | |
train_700 | Digital stochastic realization of complex analog controllers | Stochastic logic is based on digital processing of a random pulse stream, where the information is codified as the probability of a high level in a finite sequence. This binary pulse sequence can be digitally processed exploiting the similarity between Boolean algebra and statistical algebra. Given a random pulse seque... | statistical algebra;random pulse stream;series resonant dc-to-dc converters;digital stochastic realization;boolean operation;random pulse sequence;pulse stream;stochastic logic;stochastic approach;finite sequence;programmable devices;complex analog controllers;series resonant converter;binary pulse sequence;nonlinear d... | |
train_701 | High dynamic control of a three-level voltage-source-converter drive for a main | strip mill A high dynamic control system for the Alspa VDM 7000 medium-voltage drive was implemented, which provides fast torque response times of a few milliseconds despite the typically low switching frequency of gate-turn-off thyristors which is necessary to achieve high efficiency. The drive system consists of a th... | excitation;3 kv;motor voltage;torque harmonics;medium-voltage drive;dc-link voltage regulation;efficiency;8.3 mw;motor flux;synchronous motor;dc-link voltage balancing;control objective;gate-turn-off thyristors;mechanical power;current harmonics;switching frequency;strip mill;high dynamic control system;three-level vol... | |
train_702 | A comparison of high-power converter topologies for the implementation of FACTS | controllers This paper compares four power converter topologies for the implementation of flexible AC transmission system (FACTS) controllers: three multilevel topologies (multipoint clamped (MPC), chain, and nested cell) and the well-established multipulse topology. In keeping with the need to implement very-high-powe... | static compensator;statcom;inverters;upfc;multipulse topology;high-power converter topologies comparison;multipoint clamped topology;unified power flow controller;multilevel topologies;facts controllers;dc filter ratings;switching frequency;device count;static synchronous series compensator | |
train_703 | Direct self control with minimum torque ripple and high dynamics for a double | three-level GTO inverter drive A highly dynamic control scheme with very low torque ripple-direct self control (DSC) with torque hysteresis control-for very high-power medium-voltage induction motor drives fed by a double three-level inverter (D3LI) is presented. In this arrangement, two three-level inverters that are ... | parallel connected inverters;highly dynamic control scheme;stator flux;180 kw;open motor windings;multilevel converters;variable-speed drives;double three-level inverter;medium-voltage induction motor drives;torque hysteresis control;torque quality;very low torque ripple;machine observer;direct self control | |
train_704 | Multicell converters: active control and observation of flying-capacitor | voltages The multicell converters introduced more than ten years ago make it possible to distribute the voltage constraints among series-connected switches and to improve the output waveforms (increased number of levels and apparent frequency). The balance of the constraints requires an appropriate distribution of the ... | output waveforms improvement;input voltage;active control;multicell converters;series-connected switches;kalman filtering;flying-capacitor voltages;power systems harmonics;nonlinear systems;multilevel systems;power electronics | |
train_705 | Use of extra degrees of freedom in multilevel drives | Multilevel converters with series connection of semiconductors allow power electronics to reach medium voltages (1-10 kV) with relatively standard components. The increase of the number of semiconductors provides extra degrees of freedom, which can be used to improve different characteristics. This paper is focused on ... | power electronics;state estimation;multilevel drives;medium voltages;fixed-frequency dynamic control;variable-speed drives;delay estimation;series connection;degrees of freedom;torque dynamics;industrial power systems;insulated gate bipolar transistors;multilevel direct torque control strategy;1 to 10 kv;semiconductors... | |
train_706 | Enhancing the reliability of modular medium-voltage drives | A method to increase the reliability of modular medium-voltage induction motor drives is discussed, by providing means to bypass a failed module. The impact on reliability is shown. A control, which maximizes the output voltage available after bypass, is described, and experimental results are given | reliability enhancement;modular medium-voltage induction motor drives;available output voltage control;failed module bypass | |
train_707 | Vector algebra proofs for geometry theorems | Vector mathematics can generate simple and powerful proofs of theorems in plane geometry. These proofs can also be used to generalize plane geometry theorems to higher dimensions. We present three vector proofs that show the power of this technique. 1. For any quadrilateral, the sum of the squares of the diagonals is l... | multiple representations;plane geometry;vector mathematics;quadrilateral;proofs;vector algebra proofs | |
train_708 | Sufficient conditions on nonemptiness and boundedness of the solution set of | the P/sub 0/ function nonlinear complementarity problem The P/sub 0/ function nonlinear complementarity, problem (NCP) has attracted a lot of attention among researchers. Various assumed conditions, which ensure that the NCP has a solution have been proposed. In this paper, by using the notion of an exceptional family ... | boundedness;nonemptiness;p/sub 0/ function nonlinear complementarity problem;solution set;sufficient conditions | |
train_709 | Cooperative mutation based evolutionary programming for continuous function | optimization An evolutionary programming (EP) algorithm adapting a new mutation operator is presented. Unlike most previous EPs, in which each individual is mutated on its own, each individual in the proposed algorithm is mutated in cooperation with the other individuals. This not only enhances convergence speed but al... | convergence speed;cooperative mutation based evolutionary programming;continuous function optimization;local minima | |
train_71 | A study of computer attitudes of non-computing students of technical colleges | in Brunei Darussalam The study surveyed 268 non-computing students among three technical colleges in Brunei Darussalam. The study validated an existing instrument to measure computer attitudes of non-computing students, and identified factors that contributed to the formation of their attitudes. The findings show that ... | age;educational computing;noncomputing students;computer attitudes;educational qualification;survey;computer training;gender;computer experience;end user computing;personal computer ownership;technical colleges | |
train_710 | Optimal allocation of runs in a simulation metamodel with several independent | variables Cheng and Kleijnen (1999) propose a very general regression metamodel for modelling the output of a queuing system. Its main limitations are that the regression function is based on a polynomial and that it can use only one independent variable. These limitations are removed here. We derive an explicit formul... | general regression metamodel;independent variables;simulation metamodel;queuing system;optimal runs allocation;regression function | |
train_711 | On bivariate dependence and the convex order | We investigate the interplay between variability (in the sense of the convex order) and dependence in a bivariate framework, extending some previous results in this area. We exploit the fact that discrete uniform distributions are dense in the space of probability measures in the topology of weak convergence to prove o... | component variability;probability measures;parallel systems;bivariate probability distributions;mean life;discrete uniform distributions;weak convergence;serial systems;convex order;bivariate dependence;topology | |
train_712 | Waiting-time distribution of a discrete-time multiserver queue with correlated | arrivals and deterministic service times: D-MAP/D/k system We derive the waiting-time distribution of a discrete-time multiserver queue with correlated arrivals and deterministic (or constant) service times. We show that the procedure for obtaining the waiting-time distribution of a multiserver queue is reduced to that... | discrete-time multiserver queue;d-map/d/k system;waiting-time distribution;deterministic service times;markovian arrival process;correlated arrivals | |
train_713 | Efficient feasibility testing for dial-a-ride problems | Dial-a-ride systems involve dispatching a vehicle to satisfy demands from a set of customers who call a vehicle-operating agency requesting that an item tie picked up from a specific location and delivered to a specific destination. Dial-a-ride problems differ from other routing and scheduling problems, in that they ty... | routing;service-related constraints;maximum ride time constraints;dispatching;vehicle-operating agency;dial-a-ride problems;feasibility testing;scheduling;maximum wait time constraints | |
train_714 | Embeddings of planar graphs that minimize the number of long-face cycles | We consider the problem of finding embeddings of planar graphs that minimize the number of long-face cycles. We prove that for any k >or= 4, it is NP-complete to find an embedding that minimizes the number of face cycles of length at least k | np-complete problem;long-face cycles;planar graphs;embeddings;graph drawing | |
train_715 | The quadratic 0-1 knapsack problem with series-parallel support | We consider various special cases of the quadratic 0-1 knapsack problem (QKP) for which the underlying graph structure is fairly simple. For the variant with edge series-parallel graphs, we give a dynamic programming algorithm with pseudo-polynomial time complexity, and a fully polynomial time approximation scheme. In ... | np-complete problem;pseudo-polynomial time complexity;quadratic 0-1 knapsack problem;fully polynomial time approximation scheme;series-parallel support;underlying graph structure;dynamic programming algorithm | |
train_716 | Algorithmic results for ordered median problems | In a series of papers a new type of objective function in location theory, called ordered median function, has been introduced and analyzed. This objective function unifies and generalizes most common objective functions used in location theory. In this paper we identify finite dominating sets for these models and deve... | detailed complexity analysis;polynomial time algorithms;location theory;objective function;finite dominating sets;algorithmic results;ordered median problems;ordered median function | |
train_717 | A network simplex algorithm with O(n) consecutive degenerate pivots | We suggest a pivot rule for the primal simplex algorithm for the minimum cost flow problem, known as the network simplex algorithm. Due to degeneracy, cycling may occur in the network simplex algorithm. The cycling can be prevented by maintaining strongly feasible bases proposed by Cunningham (1976); however, if we do ... | negative cost augmenting cycle;cycling;degenerate pivots;network simplex algorithm;degeneracy;minimum cost flow problem;anti-stalling pivot rule;stalling | |
train_718 | New water management system begins operation at US projects | 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 effic... | data verification;data display;us projects;corps water management system;decision support tools;data acquisition;data analysis;us army corps of engineers;data storage;water control managers;water management system;water control management mission;automated information system;data visualization;decision support system;w... | |
train_719 | War games: The truth [network security] | With al Qaeda on the tip of tongues around the world, find out how terror groups could target your network. What are the dangers and how do you fight them? | security;networks;employees;malicious attacks | |
train_72 | A three-tier technology training strategy in a dynamic business environment | As end-user training becomes increasingly important in today's technology-intensive business environment, progressive companies remain alert to find ways to provide their end users with timely training and resources. This paper describes an innovative training strategy adopted by one midsize organization to provide its... | organizations;dynamic business environment;companies;innovative training strategy;three-tier technology training strategy;technology-intensive business environment;end-user training;midsize organization | |
train_720 | 19in monitors [CRT survey] | Upgrade your monitor from as little as Pounds 135. With displays on test and ranging up to Pounds 400, whether you're after the last word in quality or simply looking for again, this Labs holds the answer. Looks at ADI MicroScan M900, CTX PR960F, Eizo FlexScan T766, Hansol 920D, Hansol920P, Hitachi CM715ET, Hitachi CM7... | crt survey;hitachi cm721fet;samsung syncmaster 959nf;ctx pr960f;hansol 920d;adi microscan m900;nec multisync fe950;eizo flexscan t766;mitsubishi diamond pro 920;philips 109s40;hitachi cm715et;19in monitors;hansol920p;viewsonic g90f;liyama vision master pro 454;lg flatron 915ft plus;sony multiscan cpd-g420;19 in | |
train_721 | The results of experimental studies of the reflooding of fuel-rod assemblies | from above and problems for future investigations Problems in studying the reflooding of assemblies from above conducted at foreign and Russian experimental installations are considered. The efficiency of cooling and flow reversal under countercurrent flow of steam and water, as well as the scale effect are analyzed. T... | flow reversal;countercurrent flow;fuel-rod assemblies reflooding;steam;water;loca computer codes;loss-of-coolant accident computer codes;cooling efficiency;russian experimental installations | |
train_722 | Updating systems for monitoring and controlling power equipment on the basis of | the firmware system SARGON The economic difficulties experienced by the power industry of Russia has considerably retarded the speed of commissioning new capacities and reconstructing equipment in service. The increasing deterioration of the equipment at power stations makes the problem of its updating very acute. The ... | control systems;russia;zao nvt-avtomatika;sargon firmware system;monitoring systems;power equipment control;power equipment monitoring;power industry | |
train_723 | Simulation of physicochemical processes of erosion-corrosion of metals in | two-phase flows A computational model for the erosion-corrosion of the metals used in power equipment in two-phase flows (RAMEK-2) was developed. The results of calculations of the dependency of the intensity of the erosion-corrosion of structural steels as a function of the thermodynamic, hydrodynamic and water chemis... | fault diagnosis;nuclear power plants;thermal power plants;hydrodynamic parameters;computer simulation;protective maintenance;thermodynamic parameters;application software;three-dimensional space;wet-steam path;water-chemistry parameters;ramek-2;erosion-corrosion computational model;two-phase flows;structural steels | |
train_724 | Banking on SMA funds [separately managed accounts] | From investment management to technology to back-office services, outsourcers are elbowing their way into the SMA business. Small banks are paying attention-and hoping to reap the rewards | outsourcers;technology;small banks;back-office services;investment management;separately managed accounts |
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