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Object-Orientation In Multidatabase Systems, Evaggelia Pitoura, Omran Bukhres, Ahmed K. Elmagarmid Dec 1993

Object-Orientation In Multidatabase Systems, Evaggelia Pitoura, Omran Bukhres, Ahmed K. Elmagarmid

Department of Computer Science Technical Reports

No abstract provided.


Scheduling Support Mechanisms For Autonomous, Heterogeneous, Distributed Systems (Ph.D. Thesis), Steve J. Chapin Dec 1993

Scheduling Support Mechanisms For Autonomous, Heterogeneous, Distributed Systems (Ph.D. Thesis), Steve J. Chapin

Department of Computer Science Technical Reports

No abstract provided.


A View-Based Approach To Relaxing Global Serializability In Multidatabase Systems, Aidong Zhang, Evaggelia Pitoura, Bharat K. Bhargava Dec 1993

A View-Based Approach To Relaxing Global Serializability In Multidatabase Systems, Aidong Zhang, Evaggelia Pitoura, Bharat K. Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Asymptotic Behavior Of The Lempel-Ziv Parsing Scheme And Digital Search Trees, Philippe Jaquet, Wojciech Szpankowski Dec 1993

Asymptotic Behavior Of The Lempel-Ziv Parsing Scheme And Digital Search Trees, Philippe Jaquet, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Accelerated Learning Through A Dynamic Adaptation Of The Error Surface, Antonio G. Thome, Manoel F. Tenorio Nov 1993

Accelerated Learning Through A Dynamic Adaptation Of The Error Surface, Antonio G. Thome, Manoel F. Tenorio

Department of Electrical and Computer Engineering Technical Reports

In this report we describe a novel technique that accelerates learning pirocesses through a dynamic adaptation of the error surface. The algorithm, here name ARON (Adaptive region of Nonlinearity), implements a generalization of the basic McCulloch-Pitts type of neuron which gives to each unit the ability to automatically adapt its operational region according to the requirements of the problem. The changes on the error surface facilitates the progress of the 0ptimization criterion on its search for a minimum. ARON can be used in addition to and bring benefits to a large class of other optimization schemes.


Ensuring Relaxed Atomicity For Flexible Transactions In Multidatabase Systems, Aidong Zhang, Marian H. Nodine, Omran Bukhres Nov 1993

Ensuring Relaxed Atomicity For Flexible Transactions In Multidatabase Systems, Aidong Zhang, Marian H. Nodine, Omran Bukhres

Department of Computer Science Technical Reports

No abstract provided.


A Fuzzy Locally Sensitive Method For Cluster Analysis, Antonio G. Thome, Manoel F. Tenorio Nov 1993

A Fuzzy Locally Sensitive Method For Cluster Analysis, Antonio G. Thome, Manoel F. Tenorio

Department of Electrical and Computer Engineering Technical Reports

Cluster analysis has been playing an important role in pattern recognition, image processing, and time series analysis. The majority of the existing clustering algorithms depend on initial parameters and assumptions about the underlying dat,a structure. In this paper a fuzzy method of mode separation is proposed. The method addresses the task of multi-modal partition through a sequence of locally sensitive searches guided by a stochastic gradient ascent procedure, and addresses the cluster validity problem through a global partition performance criterion. the algorithm is computational efficient and provided gocd results when tested with a number of simulated and real data sets.


On Efficient And Robust Methods Of Accurate Camera Calibration, Chanchal Chatterjee, Vwani P. Roychowdhury Nov 1993

On Efficient And Robust Methods Of Accurate Camera Calibration, Chanchal Chatterjee, Vwani P. Roychowdhury

Department of Electrical and Computer Engineering Technical Reports

In this paper we have presented a novel algorithm for camera calibration which is a significant improvement in mathematical simplicity, accuracy and computational efficiency in the solution of all extrinsic (external camera geometric) and intrinsic (internal camera geometric and camera optics) parameters. The method involves a direct transformation from the three dimensional (3D) object world to the two-dimensional (2D) image or sensor plane in terms of "homogeneous vector forms" for the solution of 12 extrinsic and a number of intrinsic parameters for both coplanar and non-coplanar distributions of object points. Furthermore, we have demonstrated a strong robust property of the …


Curve Fitting With Cubic A-Splines, Chandrajit L. Bajaj, Guoliang Xu Nov 1993

Curve Fitting With Cubic A-Splines, Chandrajit L. Bajaj, Guoliang Xu

Department of Computer Science Technical Reports

No abstract provided.


Project Isaac: Building Simulations For Virtual Environments, George Vanĕček, James Cremer Nov 1993

Project Isaac: Building Simulations For Virtual Environments, George Vanĕček, James Cremer

Department of Computer Science Technical Reports

No abstract provided.


Dealing With Mobility: Issues And Research Challenges, Evaggelia Pitoura, Bharat Bhargava Nov 1993

Dealing With Mobility: Issues And Research Challenges, Evaggelia Pitoura, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.


The Design And Implementation Of Tripwire: A File System Integrity Checker, Gene H. Kim, Eugene H. Spafford Nov 1993

The Design And Implementation Of Tripwire: A File System Integrity Checker, Gene H. Kim, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


Mobile-Process Based Distributed Memory Simulations, Janche Sang, Edward Mascarenhas, Vernon J. Rego Oct 1993

Mobile-Process Based Distributed Memory Simulations, Janche Sang, Edward Mascarenhas, Vernon J. Rego

Department of Computer Science Technical Reports

No abstract provided.


Scheduling With Compensation In Multi- Database Systems, Aidong Zhang, Bharat Bhargava Oct 1993

Scheduling With Compensation In Multi- Database Systems, Aidong Zhang, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Novel Techniques For The Detection And Estimation Of Three-Wave Coupling With Application To Human Brain Waves, David Lee Sherman, Michael D. Zoltowski Oct 1993

Novel Techniques For The Detection And Estimation Of Three-Wave Coupling With Application To Human Brain Waves, David Lee Sherman, Michael D. Zoltowski

Department of Electrical and Computer Engineering Technical Reports

Composite linear and quadratic systems produce three-wave coupling when stimulated by random-phase input sinusoids. Due to the non-linearity of the system the output frequencies are arithmetically related to the input. Using third order cumulant statistics and their associated bispectrum, techniques are devised based on phase-insensitive matrix structures for detection and frequency estimation of coupling frequencies. The separation of the third order cumulant series into symmetric and skew-symmetric portions allows us to exploit their characteristic eigendecompositions for frequency estimation. After symmetrization, biphases can be easily extracted as coefficients of the cumulant sequence. Using a generalized eigenvector representation, we can relate symmetric …


A Characterization Of Connecting Maps As Nonlinear Roots Of The Identity, J. Peters Oct 1993

A Characterization Of Connecting Maps As Nonlinear Roots Of The Identity, J. Peters

Department of Computer Science Technical Reports

No abstract provided.


Efficient Implementation Of Thread Migration On Distributed-Memory Multi-Processors, Janche Sang, Vernon J. Rego Oct 1993

Efficient Implementation Of Thread Migration On Distributed-Memory Multi-Processors, Janche Sang, Vernon J. Rego

Department of Computer Science Technical Reports

No abstract provided.


Invariant Reconstruct Ion Of Curves And Surfaces Using A First Order Regularization, June Ho Yi, David M. Chelberg Sep 1993

Invariant Reconstruct Ion Of Curves And Surfaces Using A First Order Regularization, June Ho Yi, David M. Chelberg

Department of Electrical and Computer Engineering Technical Reports

This paper describes the application of a first order regularization technique to the problem of reconstruction of curves and surfaces from sparse data. The reconstruction methods achieve approximate invariance, sharp preservation of discontinuities and are robust to the smoothing parameter A. The robustness property to X allows a free choice of the smoothing parameter X without struggling to determine an optimal X that provides the best reconstrilction. A new approximately invariant first order stabilizing function for surface reconstruction is obtained by employing a first order Taylor expansion of a nonconvex invariant stabilizing function that is expanded at the estimated value …


Modeling Flexibility In Distributed Transactions, Ahmed Elmagarmid, Aidong Zhang Sep 1993

Modeling Flexibility In Distributed Transactions, Ahmed Elmagarmid, Aidong Zhang

Department of Computer Science Technical Reports

No abstract provided.


Softlab - A Virtual Laboratory For Computational Science, Christoph M. Hoffmann, Elias N. Houstis, John R. Rice, Ann Christine Catlin, Margaret Gaitatzes, N-H. Linda Wang, Christos G. Takoudis, David G. Taylor Sep 1993

Softlab - A Virtual Laboratory For Computational Science, Christoph M. Hoffmann, Elias N. Houstis, John R. Rice, Ann Christine Catlin, Margaret Gaitatzes, N-H. Linda Wang, Christos G. Takoudis, David G. Taylor

Department of Computer Science Technical Reports

No abstract provided.


Some Applications Of Constructive Real Algebraic Geometry, Chandrajit L. Bajaj Sep 1993

Some Applications Of Constructive Real Algebraic Geometry, Chandrajit L. Bajaj

Department of Computer Science Technical Reports

No abstract provided.


Optimal Trajectory Planning For Spray Coating, John K. Antonio Sep 1993

Optimal Trajectory Planning For Spray Coating, John K. Antonio

Department of Electrical and Computer Engineering Technical Reports

The problem of how to optimally traverse a spray applicator around a surface to be coated is formulated as a type of optimization problem known as a constrained variational problem. An optimal trajectory for a spray applicator is defined to be one that results in minimal variation in accumulated film thickness on the surface. The trajectory for an applicator is characterized by a six-dimensional vector function that specifies the position and orientation of the applicator at each instant of time. The surface to be coated is represented with a function. For each surface point and fclr each feasible position and …


An Efficient Method For Computing Volume And Surface Area Over Grid Sampled Surfaces, June Ho Yi, David M. Chelberg Sep 1993

An Efficient Method For Computing Volume And Surface Area Over Grid Sampled Surfaces, June Ho Yi, David M. Chelberg

Department of Electrical and Computer Engineering Technical Reports

In this paper, we propose the volume between two surfaces normalized by the surface area as an invariant quantitative measure for comparing surface reconstruction results. The invariant property of the volume quantity provides the same measure with respect to an arbitrary coordinate system. By normalizing the volume by the surface area, the values of the measure can be compared for different size of images. We also present a computationally simple and efficient way of computing the volume between two surfaces and the surface area using a least-square-error fit plane approximation of a surface patch defined over a rectangular grid. Experiments …


Serials Of The Energy Information Administration, Bert Chapman Sep 1993

Serials Of The Energy Information Administration, Bert Chapman

Libraries Research Publications

No abstract provided.


Semantic Problems Of Generative, Constraint Based Design, Christoph M. Hoffmann Sep 1993

Semantic Problems Of Generative, Constraint Based Design, Christoph M. Hoffmann

Department of Computer Science Technical Reports

No abstract provided.


A Distributed Memory Algorithm For 3-D Fft, Calin R. Costian, Dan C. Marinescu Sep 1993

A Distributed Memory Algorithm For 3-D Fft, Calin R. Costian, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.


Gencray Language Reference Manual, Version 2, Sanjiva Weerawarana, Ann C. Catlin, Elias N. Houstis, John R. Rice Sep 1993

Gencray Language Reference Manual, Version 2, Sanjiva Weerawarana, Ann C. Catlin, Elias N. Houstis, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


Distributed And Collaborative Volume Visualization, Vinod Anupam, Chandrajit Bajaj, Daniel Schikore, Matthew Schikore Aug 1993

Distributed And Collaborative Volume Visualization, Vinod Anupam, Chandrajit Bajaj, Daniel Schikore, Matthew Schikore

Department of Computer Science Technical Reports

No abstract provided.


Global Committability In Multidatabase Systems, O. Bukhres, Ahmed K. Elmagarmid, J. Jing, W. Kim, A. Zhang Aug 1993

Global Committability In Multidatabase Systems, O. Bukhres, Ahmed K. Elmagarmid, J. Jing, W. Kim, A. Zhang

Department of Computer Science Technical Reports

No abstract provided.


A Geometric Constraint Solver, William Bouma, Ioannis Fudos, Christoph M. Hoffmann, Jiazhen Cai, Robert Paige Aug 1993

A Geometric Constraint Solver, William Bouma, Ioannis Fudos, Christoph M. Hoffmann, Jiazhen Cai, Robert Paige

Department of Computer Science Technical Reports

No abstract provided.