Digital Commons Network^™

Evaluation Of The Cost-Effectiveness Of Pavement Surface Maintenance Activities, Ibrahim Moussa Mouaket, Abdullah Al-Mansour, Kumares C. Sinha

JTRP Technical Reports

This study covers pavement surface maintenance on three surface types: rigid, flexible and composite (asphalt overlay on rigid pavement). It addresses 3 main issues as follows: 1) Do routine maintenance activities make a difference in terms of pavement serviceability? If yes, how much? 2) Are chip and sand seal coating cost-effective? What is their optimal timing? 3) What management criteria should be used as a guide to make seal coating decisions on specific roadways? In resolving Issue #1, a stratified 2-stage sample of observational data was used in a statistical before/after comparison. SAS-General Linear Model was used due to its …

The Physical Durability And Electrical Resistivity Of Indiana Bottom Ash, Te-Chih Ke

JTRP Technical Reports

This research assessed the long-term performance (durability) and the environmental effect (corrosiveness to adjacent metal structures) of Indiana bottom ashes, based mainly on laboratory investigation. The 5-cycle sodium sulfate soundness tests and the 50-cycle freeze-thaw tests were conducted to examine the physical durability. Four electrochemical characteristics (electrical resistivity, pH, soluble chloride, and soluble sulfate) were used to estimate the corrosion potential of Indiana bottom ashes.

Evaluation criteria for durability and corrosiveness of bottom ash, based on appropriate specifications for aggregates and past experiences for soils, were developed. The comparison of test results and the above criteria shows that Indiana bottom …

Compiler-Driven Cache Management Using A State Level Transition Model, Chi-Hung Chi

Department of Electrical and Computer Engineering Technical Reports

Cache performance is critical in cache-based supercomputers, where the cache-miss/cache-hit memory reference delay ratio is typically large. Using compile-time analysis, program behavior can be predicted, and cache control directives can be embedded in the generated code. Thus, cache performance can be improved in a way not possible using conventional techniques. Given hardware able to selectively bypass the cache, cache performance can be increased because pollution can be minimized. Cache line replacement can also be controlled by the compiler (rather than by LRU, etc.), further enhancing performance. The research consists of the development of a model and algorithms providing optimal, or …

Simple Model For Dissipation In Quantum Transport, Supriyo Datta

Department of Electrical and Computer Engineering Technical Reports

No abstract provided.

Backtracking Ic Placement Algorithm, Yi Cheng, Robert H. Fujii

Department of Electrical and Computer Engineering Technical Reports

A new algorithm for integrated circuit (IC) layout placement is introduced. As in simulated annealing, it allows uphill movements but in a more restrictive manner; thus, the search for an optima is more directed. Experiments on standard cell placement have shown that the average convergence time is faster than the simulated annealing algorithm while achieving similar results.

Simulation Of Heterojunction Bipolar Transistors In Two Dimensions, Paul Emerson Dodd

Department of Electrical and Computer Engineering Technical Reports

This work describes the formulation and, development of a two-- dimensional drift-diffusion simulation program for accurate modeling of heterojunction bipolar transistors (HBT's). The model described is a versatile tool for studying HBT's, allowing the user to determine the terminal characteristics and physical operation of devices. Nonplanar structures can be treated, response to transient conditions can be computed, and the high frequency characteristics of transistors may be projected. The formulation of an electron energy balance equation is presented and included in the model in an attempt to more accurately compute high-field transport characteristics. The model is applied to some common design …

Computer Vandalism And The Law, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.

On The Analysis Of The Tail Queue Length And Waiting Time Distributions Of A Gi/Gi/C Queue, John S. Sadowsky, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

A Computer Virus Primer, Eugene H. Spafford, Kathleen A. Heaphy, David J. Ferbrache

Department of Computer Science Technical Reports

No abstract provided.

A Workload Partitioning Strategy For Pdes By A Generalized Neural Network, Elias N. Houstis, S. K. Kortesis, H. Byun

Department of Computer Science Technical Reports

No abstract provided.

The Internet Worm Incident, Eugene H. Spafford

Department of Computer Science Technical Reports

No abstract provided.

Experimental Facility For Kernel Extensions To Support Distributed Database Systems, Bharat Bhargava, Enrique Mafla, John Riedl

Department of Computer Science Technical Reports

No abstract provided.

Fast Parallel Lyndon Factorization With Applications, Alberto Aposiolico, Maxime Crochemore

Department of Computer Science Technical Reports

No abstract provided.

On The Convergence Of The Modified Accelerated Overrelaxation (Maor) Method, A. Hadjidimos, A. Psimarni, A. K. Yeyios

Department of Computer Science Technical Reports

No abstract provided.

Efficient Geometric Algorithms In The Erew-Pram, Danny Z. Chen

Department of Computer Science Technical Reports

No abstract provided.

On The Optimality Of The Counter Scheme For Dynamic Linear Lists, Micha Hofri, Hadas Shachnai

Department of Computer Science Technical Reports

No abstract provided.

An Extended Transaction Model For Multidatabase Systems, Yungho Leu, Ahmed K. Elmagarmid, Marek Rusinkiewicz

Department of Computer Science Technical Reports

No abstract provided.

Physical Mechanisms Contributing To Nonlinear Responsivity In Silicon Concentrator Solar Cells, Edmund K. Banghart

Department of Electrical and Computer Engineering Technical Reports

Comparison of experimental data with the results of present models indicates that silicon solar cell operation at high solar concentration is not completely understood. That silicon concentrator cells are not fully understood was first recognized as nonlinearities experimentally observed in the response of the short circuit current to increasing solar concentration. In order to interpret the experimentally observed sublinear responsivities, a review in the literature of the physical mechanisms which have significance for solar cell operation at high solar intensities is essential. These phenomena include bandgap narrowing, Auger recombination, carrier diffusion, and the loss of base conductivity modulation. In this …

Predicting Fault Transients On Underground Residential Distribution Systems - A Project Of The Purdue Electric Power Center, L. M. Rux, W. L. Weeks

Department of Electrical and Computer Engineering Technical Reports

This thesis addresses the problem of calculating and utilizing the voltage and current transients that may occur in underground residential distribution (URD) systems. A computational model for such systems is proposed and evaluated by comparisons to experimental results. The propagation characteristics of standard URD cables are complex but central to the computational model. The specific objective of this study was to determine whether a relatively simple approximation for the cable propagation constant is accurate enough that, when incorporated into the computational model for the transients resulting from a fault in the system, the resulting fault transient can be utilized to …

On The Height Of Digital Trees And Related Problems, Wojciech Szpankowski

Department of Computer Science Technical Reports

No abstract provided.

Transaction Accessibility And Integrity Issues In Heterogeneous Distributed Database Systems, Weimin Du, Ahmed K. Elmagarmid, Marek Rusinkiewicz

Department of Computer Science Technical Reports

No abstract provided.

Protosolid: An Inside Look, George Vanecek

Department of Computer Science Technical Reports

No abstract provided.

Obtaining Boundaries With Respect: A Simple Approach To Performing Set Operations On Polyhedra, George Vanecek

Department of Computer Science Technical Reports

No abstract provided.

A Hierarchical Approach To Concurrency Control For Multidatabases, Ahmed K. Elmagarmid, Yunhho Leu

Department of Computer Science Technical Reports

No abstract provided.

Polygon Nesting And Robustness, Chanderjit Bajaj, Tamai Dey

Department of Computer Science Technical Reports

No abstract provided.

Proof Of A Mutual Exclusion Algorithm-- A `Class'ic Example, Micha Hofri

Department of Computer Science Technical Reports

No abstract provided.

Parallel (//) Ellpack Pde Solving System, Elias N. Houstis, John R. Rice, N. P. Chrisochoides, H. C. Karathansis, P. N. Papachiou, E. A. Vavalis, K. Wang

Department of Computer Science Technical Reports

No abstract provided.

Efficient Heap Implementation With A Fixed-Size Linear Systolic Array, Jyh-Jong Tsay

Department of Computer Science Technical Reports

No abstract provided.

Simple Performance Models For Computationally Intense Remote Procedure Calls, Paul E. Buis

Department of Computer Science Technical Reports

No abstract provided.

Design Considerations For Distributed Scientific Software Systems, Paul E. Buis

Department of Computer Science Technical Reports

No abstract provided.