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Accident Reduction Factors For Indiana, Daniel Joseph Ermer, Kumares C. Sinha Jan 1991

Accident Reduction Factors For Indiana, Daniel Joseph Ermer, Kumares C. Sinha

JTRP Technical Reports

This report presents the results of a study conducted to develop appropriate accident reduction factors associated with various highway improvement projects in Indiana. The factors were developed through a before-and-after analysis of accident data from 1983 to 1987. Disclaimer: This report presents the results of statistical analyses applied to available data. The accident reduction factor values do not imply any endorsement of any particular project types by the Federal Highway Administration or the Indiana Department of Transportation or the Joint Highway Research Project of Purdue University.


Automated Construction Data Management System, Bob G. Mccullouch Jan 1991

Automated Construction Data Management System, Bob G. Mccullouch

JTRP Technical Reports

Project engineers and managers involved in construction spend a disproportionate amount of time collecting and processing construction data. This processing of data typically causes the construction manager to be distracted from the more important task of supervising and controlling the project. The amount of construction data will most likely continue to expand in the future creating more of a burden on the construction manager. So reducing the volume of data most likely will not occur. New innovative data management systems that utilize the latest in computer and automatic identification technologies should be developed. This report describes such a system for …


Application Of Rapid Asphalt Content Test To Slag Mixes, Douglas Windslow Jan 1991

Application Of Rapid Asphalt Content Test To Slag Mixes, Douglas Windslow

JTRP Technical Reports

The "nuclear" asphalt content gage was used with bituminous mixes containing slag aggregates to assess its applicability as a rapid analysis tool for these types of mixes. It was found to work as well, or better, than the standard extraction technique. It was also found to have additional advantages over the extraction technique since it is about an order to magnitude faster, requires no solvent and involves no decisions on the part of the user.


A Sensitivity Analysis Of The Parameters For A Cap Plasticity Model : Interim Report, Scott J. Ludlow, Wai-Fah Chen, Philippe L. Bourdeau, C. W. Lovell Jan 1991

A Sensitivity Analysis Of The Parameters For A Cap Plasticity Model : Interim Report, Scott J. Ludlow, Wai-Fah Chen, Philippe L. Bourdeau, C. W. Lovell

JTRP Technical Reports

No abstract provided.


Automated Construction Data Management System, Bob G. Mccullouch Jan 1991

Automated Construction Data Management System, Bob G. Mccullouch

JTRP Technical Reports

No abstract provided.


Heuristic Guided Pre-Optimized Algorithm Substitution For Parallel Computers, Ko-Yang Wang Dec 1990

Heuristic Guided Pre-Optimized Algorithm Substitution For Parallel Computers, Ko-Yang Wang

Department of Computer Science Technical Reports

No abstract provided.


Models And Algorithms For Co-Scheduling Compute-Intensive Tasks On A Network Of Workstations, Mikhail J. Atallah, Christina Lock, Dan C. Marinescu, Howard J. Seigel, Thomas L. Casavant Dec 1990

Models And Algorithms For Co-Scheduling Compute-Intensive Tasks On A Network Of Workstations, Mikhail J. Atallah, Christina Lock, Dan C. Marinescu, Howard J. Seigel, Thomas L. Casavant

Department of Computer Science Technical Reports

No abstract provided.


Voronoi Diagrams In A River, Kokichi Sugihara Dec 1990

Voronoi Diagrams In A River, Kokichi Sugihara

Department of Computer Science Technical Reports

No abstract provided.


Brep-Index: A Multi-Dimensional Space Partitioning Tree, George Vanĕček Dec 1990

Brep-Index: A Multi-Dimensional Space Partitioning Tree, George Vanĕček

Department of Computer Science Technical Reports

No abstract provided.


Optimal Superprimitivity Testing For Strings, Alberto Apostolico, Martin Farach, Costas S. Iliopoulos Nov 1990

Optimal Superprimitivity Testing For Strings, Alberto Apostolico, Martin Farach, Costas S. Iliopoulos

Department of Computer Science Technical Reports

No abstract provided.


Implementation And Performance Of A Communication Facility For Distributed Transaction Processing, Enrique Mafla, Bharat Bhargava Nov 1990

Implementation And Performance Of A Communication Facility For Distributed Transaction Processing, Enrique Mafla, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.


Managing Data Synchronization Automatically For Distributed-Memory Architectures, Ko-Yang Wang Nov 1990

Managing Data Synchronization Automatically For Distributed-Memory Architectures, Ko-Yang Wang

Department of Computer Science Technical Reports

No abstract provided.


Software Performance Evaluation Papers In Toms, Volumes 1-15, John R. Rice Oct 1990

Software Performance Evaluation Papers In Toms, Volumes 1-15, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.


A Broadband Noise Prediction Scheme For Low-Noise Centrifugal Blowers, Peter Konieczny, J. Stuart Bolton Oct 1990

A Broadband Noise Prediction Scheme For Low-Noise Centrifugal Blowers, Peter Konieczny, J. Stuart Bolton

Publications of the Ray W. Herrick Laboratories

In this paper we outline a semi-empirical procedure for predicting the broadband sound power spectrum radiated by any member of a family of geometrically similar, centrifugal blowers. The prediction scheme is based on the use of a normalized sound power spectrum that is obtained by measuring the sound power radiated by one member of the blower family. In the present instance, a low noise blower design has been identified by conducting a large scale parametric study of blower noise as a function of geometrical design parameters and operating point; the resulting optimum design served to define the geometrical parameters of …


Domain Decomposer: A Software Tool For Mapping Pde Computations To Parallel Architectures, N. P. Chrisochoides, C. E. Houstis, Elias N. Houstis, P. N. Papachiou, S. K. Kortesis Sep 1990

Domain Decomposer: A Software Tool For Mapping Pde Computations To Parallel Architectures, N. P. Chrisochoides, C. E. Houstis, Elias N. Houstis, P. N. Papachiou, S. K. Kortesis

Department of Computer Science Technical Reports

No abstract provided.


Global Concurrency Control In Heterogeneous Distributed Database Systems, Ahmed K. Elmagarmid, Weimin Du, Yungho Leu Sep 1990

Global Concurrency Control In Heterogeneous Distributed Database Systems, Ahmed K. Elmagarmid, Weimin Du, Yungho Leu

Department of Computer Science Technical Reports

No abstract provided.


The Origins Of Modern Computing, Saul Rosen Aug 1990

The Origins Of Modern Computing, Saul Rosen

Department of Computer Science Technical Reports

No abstract provided.


Efficient Parallel Binary Search On Sorted Arrays, Danny Z. Chen Aug 1990

Efficient Parallel Binary Search On Sorted Arrays, Danny Z. Chen

Department of Computer Science Technical Reports

No abstract provided.


Computing Some Distance Functions Between Polygons, Mikhail J. Atallah, Celso C. Ribeiro, Sergio Lifschitz Aug 1990

Computing Some Distance Functions Between Polygons, Mikhail J. Atallah, Celso C. Ribeiro, Sergio Lifschitz

Department of Computer Science Technical Reports

No abstract provided.


History Of The Computer Sciences Department At Purdue University, John R. Rice, Saul Rosen Aug 1990

History Of The Computer Sciences Department At Purdue University, John R. Rice, Saul Rosen

Department of Computer Science Technical Reports

No abstract provided.


Efficient Detection Of Quasiperiodicities In Strings, Alberto Apostolico, Andrzej Ehrenfeucht Aug 1990

Efficient Detection Of Quasiperiodicities In Strings, Alberto Apostolico, Andrzej Ehrenfeucht

Department of Computer Science Technical Reports

No abstract provided.


Unifying Parametric And Implicit Surface Representations For Computer Graphics: Parametric Surface Display And Algebraic Surface Fitting, Changrajit L. Bajaj Jul 1990

Unifying Parametric And Implicit Surface Representations For Computer Graphics: Parametric Surface Display And Algebraic Surface Fitting, Changrajit L. Bajaj

Department of Computer Science Technical Reports

No abstract provided.


A Statically-Typed Language With Classes, Mike Beaven, Ryan Stanisfer, Dan Wetklow Jul 1990

A Statically-Typed Language With Classes, Mike Beaven, Ryan Stanisfer, Dan Wetklow

Department of Computer Science Technical Reports

No abstract provided.


The Cops Security Checker System, Daniel Farmer, Eugene H. Spafford Jul 1990

The Cops Security Checker System, Daniel Farmer, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.


Convex Decomposition Of Polyhedra And Robustness, Chanderjit Bajaj, Tamal K. Dey Jun 1990

Convex Decomposition Of Polyhedra And Robustness, Chanderjit Bajaj, Tamal K. Dey

Department of Computer Science Technical Reports

No abstract provided.


Digital Search Trees Again Revisited: The Internal Path Length Perspective, Peter Kirschenhofer, Helmut Prodinger, Wojciech Szpankowski Jun 1990

Digital Search Trees Again Revisited: The Internal Path Length Perspective, Peter Kirschenhofer, Helmut Prodinger, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.


Typed Token Approach For Database Processing During Network Partitioning, Bharat Bhargava, Shy-Renn Lian Jun 1990

Typed Token Approach For Database Processing During Network Partitioning, Bharat Bhargava, Shy-Renn Lian

Department of Computer Science Technical Reports

No abstract provided.


A Data Structure For Analyzing Collisions Of Moving Objects, George Vanecek Jun 1990

A Data Structure For Analyzing Collisions Of Moving Objects, George Vanecek

Department of Computer Science Technical Reports

No abstract provided.


Loop Coalescing And Scheduling For Barrier Mimd Architectures, Matthew T. O'Keefe, Henry G. Dietz Jun 1990

Loop Coalescing And Scheduling For Barrier Mimd Architectures, Matthew T. O'Keefe, Henry G. Dietz

Department of Electrical and Computer Engineering Technical Reports

Barrier MIMDs are asynchronous Multiple Instruction stream Multiple Data stream architectures capable of parallel execution of variable execution time instructions and arbitrary control flow (e.g., while loops and calls); however, they differ from conventional MlMDs in that the need for run-time synchronization is significantly reduced. This work considers the problem of scheduling nested loop structures on a barrier MIMD. The basic approach employs loop coalescing, a technique for transforming a multiply-nested loop into a single loop. Loop coalescing is extended to nested triangular loops, in which inner loop bounds are functions of outer loop indices. Also, a more efficient scheme …


Adaptive Control Of Flexible Joint Robots Derived From Arm Energy Considerations, Shaheen Ahmad, Fouad Mrad Jun 1990

Adaptive Control Of Flexible Joint Robots Derived From Arm Energy Considerations, Shaheen Ahmad, Fouad Mrad

Department of Electrical and Computer Engineering Technical Reports

Almost all industrial robots exhibit joint flexibility due to mechanical compliance of their gear boxes. In this paper we outline the design of three controllers for flexible joint robots. Two of the three controllers are suitable for parameter adaptation, the candidate Lyapunov functions for these two controllers are derived from arm energy considerations. The desired actuator trajectory in a flexible joint robot is dependent not only on the desired kinematic trajectory of the link but also on the link dynamics. Unfortunately, link dynamic parameters are unknown in most cases, as a result the desired actuator trajectory is also unknown: To …