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1995

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Purdue University

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Bit-Sequences: A New Cache Invalidation Method In Mobile Environments, Jin Jing, Ahmed K. Elmagarmid, Abdelsalam Helal, Rafael Alonso Dec 1995

Bit-Sequences: A New Cache Invalidation Method In Mobile Environments, Jin Jing, Ahmed K. Elmagarmid, Abdelsalam Helal, Rafael Alonso

Department of Computer Science Technical Reports

No abstract provided.


Inverse Pattern Matching, Amihood Amir, Alberto Apostolico, Moshe Lewenstein Dec 1995

Inverse Pattern Matching, Amihood Amir, Alberto Apostolico, Moshe Lewenstein

Department of Computer Science Technical Reports

No abstract provided.


Migrant Threads On Process Farms: Parallel Programming With Ariadne*, Edward Mascarenhas, Vernon Rego Dec 1995

Migrant Threads On Process Farms: Parallel Programming With Ariadne*, Edward Mascarenhas, Vernon Rego

Department of Computer Science Technical Reports

No abstract provided.


Lightweight Write Detection And Checkpointing For Fine-Grained Persistence, Antony L. Hosking, J. Eliot B. Moss Dec 1995

Lightweight Write Detection And Checkpointing For Fine-Grained Persistence, Antony L. Hosking, J. Eliot B. Moss

Department of Computer Science Technical Reports

No abstract provided.


The New Jersey Machine-Code Toolkit, Norman Ramsey, Mary F. Fernáyesndez Dec 1995

The New Jersey Machine-Code Toolkit, Norman Ramsey, Mary F. Fernáyesndez

Department of Computer Science Technical Reports

No abstract provided.


A Case Study In Synchronous Parallel Discrete Event Simulation, José Miguel Alonso, José A.B Fortes Dec 1995

A Case Study In Synchronous Parallel Discrete Event Simulation, José Miguel Alonso, José A.B Fortes

Department of Electrical and Computer Engineering Technical Reports

This paper considers the suitability of SPED, a synchronous parallel discrete event simulator, for the study of message passing networks. The simulation algorithm is described, and its potential performance is assessed showing that, under some simplifying assumptions, SPED might offer speedups directly proportional to the number of processors used in the simulation. An implementation of SPED in a distributed memory parallel system is used to study a model of an interconnection network for a multicomputer. Experiments show that SPED performs nearly as expected, as long as the event density imposed on the LPs is above a certain threshold. If this …


An Evaluation Of Implementations Of The Cmb Parallel Simulation Algorithm On Distributed Memory Multicomputers, José Miguel, Agustin Arruabarrena, Ramon Beivide, José A..B. Fortes Dec 1995

An Evaluation Of Implementations Of The Cmb Parallel Simulation Algorithm On Distributed Memory Multicomputers, José Miguel, Agustin Arruabarrena, Ramon Beivide, José A..B. Fortes

Department of Electrical and Computer Engineering Technical Reports

A model of a message-passing network is used to analyze the behavior of three implementations of the Chandy-Misra-Bryant parallel simulation algorithm. The characteristics of the model, the organization of the logical processes that constitute the simulator and the characteristics of the host parallel computer have a definite influence on the achieved performance, measured in terms of speedup. Large, loaded models help CMB to synchronize with a minimum overhead, efficiently exploiting the available parallelism. Mapping several LPs onto each processor achieves a better use of the available processing power, because while a LP is blocked (synchronizing) others can use the CPU. …


Transients In Power Systems, M. Belkhayat, J. Edwards, N. Hoonchareon, O. Marte, D. Stenberg, E. Walters Dec 1995

Transients In Power Systems, M. Belkhayat, J. Edwards, N. Hoonchareon, O. Marte, D. Stenberg, E. Walters

Department of Electrical and Computer Engineering Technical Reports

Power system engineering largely focuses on steady state analysis. The main areas of power system engineering are power flow studies and fault studies - both steady state technologies. But the world is largely transient, and power systems are always subject to time varying and short lived signals. This technical report concerns several important topics in transient analyses of power systems. The leading chapter deals with a new analytical tool-wavelets-for power system transients. Flicker and electric are furnace transients are discussed in Chapters I1 and IV. Chapter 111 deals with transients from shunt capacitor switching. The concluding chapters deal with transformer …


Sliced Configuration Spaces For Curved Planar Bodies, Elisha Sacks, Chandrajit Bajaj Dec 1995

Sliced Configuration Spaces For Curved Planar Bodies, Elisha Sacks, Chandrajit Bajaj

Department of Computer Science Technical Reports

No abstract provided.


Kenematic Tolerance Analysis, Leo Joskowicz, Elisha Sacks, Vijay Srinivasan Dec 1995

Kenematic Tolerance Analysis, Leo Joskowicz, Elisha Sacks, Vijay Srinivasan

Department of Computer Science Technical Reports

No abstract provided.


Partitioned Data Management In Mobile Environments, Ahmed K. Elmagarmid, Jin Jing, Abdelsalam Helal, Rafael Alonso Dec 1995

Partitioned Data Management In Mobile Environments, Ahmed K. Elmagarmid, Jin Jing, Abdelsalam Helal, Rafael Alonso

Department of Computer Science Technical Reports

No abstract provided.


Pattern Matching Image Compression: Algorithmic And Empirical Results, Mikhail J. Atallah, Yann Génin, Wojciech Szpankowski Dec 1995

Pattern Matching Image Compression: Algorithmic And Empirical Results, Mikhail J. Atallah, Yann Génin, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


On Nonlinear Circuit Components With N-Shaped Conductance Characteristics , Todd A. Wey, Lawrence L. Ogborn Dec 1995

On Nonlinear Circuit Components With N-Shaped Conductance Characteristics , Todd A. Wey, Lawrence L. Ogborn

Department of Electrical and Computer Engineering Technical Reports

Currently, three-terminal devices with N-shaped I-V characteristics are being fabricated for switching and multi-valued logic applications. The purpose of this study is to investigate switching speed improvements and potential problems of circuit designs employing these nonlinear devices. In this work, both two-terminal and three-terminal devices are analyzed. A design methodology is developed for a second-order twoterminal device circuit and a novel method of I-V characterization is presented. For the three-terminal device, a simple PSpice macromodel is developed and a new figure of merit for switching speed improvement is given. A practical chaotic synthesis method is proposed for this device in …


Finite Element Models For Sound Transmission Through Foam Wedges And Foam Layers Having Spatially Graded Properties, J. Stuart Bolton, Yeon June Kang Nov 1995

Finite Element Models For Sound Transmission Through Foam Wedges And Foam Layers Having Spatially Graded Properties, J. Stuart Bolton, Yeon June Kang

Publications of the Ray W. Herrick Laboratories

No abstract provided.


A Simple Solver For Linear Equations Containing Nonlinear Operators, Norman Ramsey Nov 1995

A Simple Solver For Linear Equations Containing Nonlinear Operators, Norman Ramsey

Department of Computer Science Technical Reports

No abstract provided.


Blending Basic Implicit Shapes Using Trivariate Box Splines, Jörg Peters, Michael Wittman Nov 1995

Blending Basic Implicit Shapes Using Trivariate Box Splines, Jörg Peters, Michael Wittman

Department of Computer Science Technical Reports

No abstract provided.


Complexity Of Sequential Pattern Matching Algorithms, Mireille Régnier, Wojciech Szpankowski Nov 1995

Complexity Of Sequential Pattern Matching Algorithms, Mireille Régnier, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Multi-View Access Protcols For Large-Scale Replication, Xiangning (Sean) Liu, Abdelsalam (Sumi) Helal, Bharat K. Bhargava Nov 1995

Multi-View Access Protcols For Large-Scale Replication, Xiangning (Sean) Liu, Abdelsalam (Sumi) Helal, Bharat K. Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Optimal P-Cyclic Sor For Complex Spectra, S. Galanis, A. Hadjidimos, D. Noutsos Nov 1995

Optimal P-Cyclic Sor For Complex Spectra, S. Galanis, A. Hadjidimos, D. Noutsos

Department of Computer Science Technical Reports

No abstract provided.


Sequence Alignment In Molecular Biology, Alberto Apostolico, Raffaele Fiancarlo Nov 1995

Sequence Alignment In Molecular Biology, Alberto Apostolico, Raffaele Fiancarlo

Department of Computer Science Technical Reports

No abstract provided.


Bayes Error Estimation Using Local Metrics, Keinosuke Fukunaga, Sze-Po R. Hung Nov 1995

Bayes Error Estimation Using Local Metrics, Keinosuke Fukunaga, Sze-Po R. Hung

Department of Electrical and Computer Engineering Technical Reports

Bayes error estimation has long been an interesting topic in the pattern recognition area. For data with small dimensionality and large sample size, it is easy to estimate the upper and lower bounds of the Bayes error using global metrics in nonparametric classifiers. However, for the SAR (Synthetic Aperture Radar) data, the data dimensionality is very large (n=64x64=4,096) and the sample size is very small (Nz1,OOO). No conventional methods are able to estimate the Bayes error of the SAR data. Our solution to this problem is to hlly use the property that the intrinsic dimensionality of the SAR data is …


A Neuro-Fuzzy Approach To Agglomerative Clustering, Anupam Joshi, Narendran Ramakrishnan, John R. Rice, Elias N. Houstis Oct 1995

A Neuro-Fuzzy Approach To Agglomerative Clustering, Anupam Joshi, Narendran Ramakrishnan, John R. Rice, Elias N. Houstis

Department of Computer Science Technical Reports

No abstract provided.


An Evaluation Of Transmitting Compressed Images In A Wide Area Network, Melliyal Annamalai, Bharat Bhargava Oct 1995

An Evaluation Of Transmitting Compressed Images In A Wide Area Network, Melliyal Annamalai, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Www//Pdepack A Web Based Problem Solving Environment For Partial Differential Equations, W. R. Dyksen, Elias N. Houstis, John R. Rice Oct 1995

Www//Pdepack A Web Based Problem Solving Environment For Partial Differential Equations, W. R. Dyksen, Elias N. Houstis, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Relocating Machine Instructions By Currying, Norman Ramsey Oct 1995

Relocating Machine Instructions By Currying, Norman Ramsey

Department of Computer Science Technical Reports

No abstract provided.


Effective Strategies For Multi-Media Message Transmission: Udp Cooling And Tcp, Xiangning Sean Liu, Lebin Cheng, Bharat Bhargava Oct 1995

Effective Strategies For Multi-Media Message Transmission: Udp Cooling And Tcp, Xiangning Sean Liu, Lebin Cheng, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Statistical Estimation Of Combinational And Sequential Cmos Digital Circuit Activity Considering Uncertainty Of Gate Delay Models, Tan Li Chou, Kaushik Roy Oct 1995

Statistical Estimation Of Combinational And Sequential Cmos Digital Circuit Activity Considering Uncertainty Of Gate Delay Models, Tan Li Chou, Kaushik Roy

Department of Electrical and Computer Engineering Technical Reports

While estimating glitches or spurious transitions is challenge due to signal correlations, the random behavior of logic gate delays makes the estimation problem even more clifficult. In this paper, we present statistical estimation of signal activity at the internal and output nodes of combini3tional and sequential CMOS logic circuits considering uncertainty of gate delay models. The methodology is based on the stochastic models of logic signals and the probabilistic behavior of gate delays due to process variations, interconnect parmitics, etc. We propose a statistical technique of estimating average-case activity, which is flexible in adopting different delay models and variations and …


Nonlinear Modeling And Processing Of Speech With Applications To Speech Coding, Shan Lu, Peter C. Doerschuk Oct 1995

Nonlinear Modeling And Processing Of Speech With Applications To Speech Coding, Shan Lu, Peter C. Doerschuk

Department of Electrical and Computer Engineering Technical Reports

IN recent years there has been increasing interest in nonlinear speech modeling. In our approach, a speech signal is modeled as a sum of jointly amplitude (AM) and frequency (FM) modulated cosines with slowly-varying center ffrequencies. The key problem is to extract the center frequency and the amplitude and frequency modulations for each formant in the model from the measured speech signals. In this study, we describe the speech signal in terms of statistical models and apply statistical nonlinear filtering techniclues (Extended Kalman Filter) to estimate the amplitude and frequency. The Ahl and Fbl signals are estimated for all the …


Ml F'Ararneter Estirnation For Markov Random Fields, With Applications To Bayesian Tomography, Suhail S. Saquib, Charles A. Bouman, Ken Sauer Oct 1995

Ml F'Ararneter Estirnation For Markov Random Fields, With Applications To Bayesian Tomography, Suhail S. Saquib, Charles A. Bouman, Ken Sauer

Department of Electrical and Computer Engineering Technical Reports

Markuv random fields (MRF) have proven useful for modeling the a priori information in Bayesia.n tomographic reconstruction problems. However, optimal parameter estimation of the MRF model remains a difficult problem due to the intractable nature of the partition function. In this report, we propose a fast parameter estimation scheme to obtain optimal estimates of the free parameters associated with a general MRF model formulation. In particular, for the generalized Gaussian MRF (GGMRF) case, we show that the ML estimate of the temperature T has a simple closed form solution. We present an efficient scheme for the ML estimate of the …


An Architecture For A Camputs-Scale Wireless Mobile Internet, Douglas E. Comer, John C. Lin, Vincent F. Russo Sep 1995

An Architecture For A Camputs-Scale Wireless Mobile Internet, Douglas E. Comer, John C. Lin, Vincent F. Russo

Department of Computer Science Technical Reports

No abstract provided.