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Articles 40441 - 40470 of 50118
Full-Text Articles in Entire DC Network
Development Of A Procedure To Identify Aggregates For Bituminous Surfaces In Indiana, Douglas W. Bruner, Jung Chan Choi, Terry R. West
Development Of A Procedure To Identify Aggregates For Bituminous Surfaces In Indiana, Douglas W. Bruner, Jung Chan Choi, Terry R. West
JTRP Technical Reports
Adequate friction resistance is needed to prevent pavement slipperiness and to allow vehicles to stop in a reasonable distance. In stone mastic asphalt surfaces, friction resistance is mainly a function of the interaction between the aggregates exposed at the road surface and the vehicle tires. Performance of the aggregate is reduced over time by wear and polishing as a consequence of vehicular traffic. In this research a method to investigate aggregate performance based on physical, chemical and petrographic factors has been evaluated. The objective was to develop a laboratory method to test Indiana dolomite, limestone, sandstone, and gravel aggregates to …
Effective Scheduling Of Road And Bridge Closures: Phase 2, Kumares C. Sinha, Mithilesh K. Jha
Effective Scheduling Of Road And Bridge Closures: Phase 2, Kumares C. Sinha, Mithilesh K. Jha
JTRP Technical Reports
This research provides a study on work zone impact analysis. In case of multiple road closures, the network approach is used to find an effective scheduling such that the total user delay is reduced. A dynamic model for analyzing the work zone impact during the period when network is in transition state is also developed. A salient feature of the dynamic model is drives’ perception updating model, which incorporates availability and the quality of information as perceived by drivers.
Environmental Bioassay Evaluation Of Foundry Waste Residuals, Kenneth Chad Bastian, James E. Alleman
Environmental Bioassay Evaluation Of Foundry Waste Residuals, Kenneth Chad Bastian, James E. Alleman
JTRP Technical Reports
Although the constructive reuse of foundry residuals represents a decidedly beneficial goal with distinct economic and environmental benefits, potential end-users are nonetheless reluctant to use these residuals, given an inherent concern about potential unforeseen environmental liabilities. Results of foundry residual leachate characterization to date strongly suggest that many ferrous foundries are discarding sands whose quality is fully amenable to their future use with embankment construction and related high-volume highway development activities. In order to provide additional assurance as to the environmental impact of foundry residual reuse, the MicrotoxTM bioassay has been used to quantify the response of living organisms (e.g., …
Estimating Statewide Trip Tables From Vehicle Classification Counts, James Yang, Jon D. Fricker
Estimating Statewide Trip Tables From Vehicle Classification Counts, James Yang, Jon D. Fricker
JTRP Technical Reports
Although a statewide trip table is an important ingredient in the statewide planning process, such information is difficult to obtain. The study described in this report investigated the applicability to the state-level problem of existing software developed to estimate trip tables in urban areas (or smaller) from link counts. Criteria that would form the basis for determining the applicability of any particular software package were developed. Packages such as The Highway Emulator (THE), PC-LINKOD, and Fast Matrix Calibration (FMC) were tested using small and medium sized networks. Because FMC performed the best on these tests, it was applied to the …
Indot Constructability Multimedia System Working Module, Bob G. Mccullouch
Indot Constructability Multimedia System Working Module, Bob G. Mccullouch
JTRP Technical Reports
Constructability can be defined as incorporating knowledge into the design product or designing so it is easier to construct. Transportation facilities have suffered from this problem, with INDOT no exception. The most important feature of any constructability program is capturing field examples, commonly referred to as “lessons learned,” and archiving and retrieving them into future projects that are either similar or have similar conditions in order to eliminate or prevent the same mistakes from occurring again. A mechanism or tool that can perform this task would be a valuable asset for INDOT. A previous JHRP project title “An INDOT Lessons …
Laboratory Study On The Use Of Tire Shreds And Rubber-Sand In Backfilled And Reinforced Soil Applications, Andres Bernal, C. W. Lovell, Rodrigo Salgado
Laboratory Study On The Use Of Tire Shreds And Rubber-Sand In Backfilled And Reinforced Soil Applications, Andres Bernal, C. W. Lovell, Rodrigo Salgado
JTRP Technical Reports
Millions of scrap tires are discarded annually in the United States, the bulk of which are currently landfilled or stockpiled. This consumes valuable landfill space, or, if improperly disposed, creates a fire hazard and provides a prolific breeding ground for rats and mosquitoes. The use of tire shreds as lightweight fill material can sharply reduce the tire disposal problem. The present study, based on laboratory testing and numerical modeling examines the feasibility of incorporating tire shreds and rubber-sand mixtures as lightweight geomaterial in embankments and backfills. The growing interest in utilizing waste materials in civil engineering applications has opened the …
Locating The Drainage Layer For Bituminous Pavements In Indiana, Hossam Farouk. Hassan, Thomas D. White
Locating The Drainage Layer For Bituminous Pavements In Indiana, Hossam Farouk. Hassan, Thomas D. White
JTRP Technical Reports
Pavement subsurface drainage and its effect on pavement performance has been a subject of interest since the 18th and 19th centuries. With no doubt the detrimental effects of heavy wheel loads on pavements with saturated base material is a significant factor. The consequence of subsurface water on pavement performance includes premature rutting, cracking, faulting, and increased roughness, all of which lead to a decrease in serviceability. This research study involves the evaluation of the drainage performance of three section configurations. The sections were built with a difference in the filter as well as the drainage layer. Indiana #5D, and #53 …
Wildflowers For Indiana Highways, Michael N. Dana, Ricky Darrell Kemery, Brian S. Boszor
Wildflowers For Indiana Highways, Michael N. Dana, Ricky Darrell Kemery, Brian S. Boszor
JTRP Technical Reports
Questions concerning wildflower usage on Indiana highway rights-of-way were investigated. Native prairie wildflower seed quality was found to be highly variable among supply companies, species, and years. Less variability was found among “garden” wildflower species and suppliers. Direct seeding was found to be successful with six species of native prairie forbs: Butterfly Milkweed Asclepiads tuberose, Wild Bergamot Monarda fistulosa, New England Aster Aster novae-angliae, Pale-purple Coneflower Echinacea pallida, Gray-headed Coneflower Ratibido pinnota, Ironweed Vernonia fasciculosa. Five species of “garden” wildflowers performed well: Common Cosmos Cosmos bipinnatus, Yellow Cosmos Cosmos sulphureus, Cornflower Centaurea cyanus, Goldenwave Coreopsis sincioria, Black-eyed Susan Rudbeckia hiria. …
Using Pyrolized Carbon Black (Pcb) From Waste Tires In Asphalt Pavement (Part 2, Asphalt Binder), Yongdong Zeng, C. W. Lovell
Using Pyrolized Carbon Black (Pcb) From Waste Tires In Asphalt Pavement (Part 2, Asphalt Binder), Yongdong Zeng, C. W. Lovell
JTRP Technical Reports
Scrap tires derived from automobiles have become a large environmental problem in the United States. In this study, research is carried out to investigate the potential use of tire-derived pyrolyzed carbon black from scrap tires as an asphalt cement modifier. The asphalt cements used in this research were AC10 and AC20. Penetration and softening point tests were performed to obtain the consistency of the asphalt cements. The pyrolyzed carbon black, as provided by Wolf Industries, was combined with the asphalt cement in the following percentages; 5%, 10%, 15% and 20%. Penetration, softening point and ductility tests were performed to determine …
Using Pyrolized Carbon Black (Pcb) From Waste Tires In Asphalt Pavement (Part 1, Limestone Aggregate), Taesoon Park, C. W. Lovell
Using Pyrolized Carbon Black (Pcb) From Waste Tires In Asphalt Pavement (Part 1, Limestone Aggregate), Taesoon Park, C. W. Lovell
JTRP Technical Reports
This study presents the viability of using PCB as an additive in hot mix asphalt concrete. Different ratios of PCB (5%, 10%, 15%, and 20% by weight of asphalt) were blended with two grades of asphalt (AC-10 and AC-20). The complete behaviors of the PCB modified asphalt concrete were investigated by comprehensive laboratory testing and evaluation. The Marshall method was used to determine the optimum binder content and the mechanical properties and void relationships were investigated by this method. The Gyratory Testing Machine was used to define the stress-strain relationships of the PCB mixtures. The rutting potential of PCB mixtures …
Performance Evaluation Of Highway Embankment Constructed Using Coal Ash, James E. Alleman, Patrick J. Fox, Daniel J. Debattista
Performance Evaluation Of Highway Embankment Constructed Using Coal Ash, James E. Alleman, Patrick J. Fox, Daniel J. Debattista
JTRP Technical Reports
The objective of this project was to assess the environmental and geotechnical performance of two highway embankments constructed using coal combustion fly ash. The environmental work focused on characterizing monitoring well water samples from the site before, during, and after construction. In addition, a number in in-situ lysimeter water samples were also tested during and after construction. In each case, water samplers were evaluated in terms of their constitutive organic and metal concentrations, as well as their relative bioassay response using a MicrotoxTM protocol. The geotechnical work included monitoring of ash water content and unit weight during placement, settlement analysis, …
Seismic Evaluation Of Highway Bridges - Phase 1, J. A. Ramirez, Austin D. Pan, Frank Thompson Mwakasisi
Seismic Evaluation Of Highway Bridges - Phase 1, J. A. Ramirez, Austin D. Pan, Frank Thompson Mwakasisi
JTRP Technical Reports
The primary objective of the study was to establish the guidelines for screening, assessing, and ranking Indiana bridges for seismic upgrade. The outcome of the study is a complete strategy for the detailed structural assessment of Indiana highway bridges subjected to seismic forces. The structural evaluation is conducted using a nonlinear time-history analysis of the bridge for simulated or actual records. The specific soil conditions at the site are accounted in terms of the ground motion. From the time history analysis the maximum structural response including displacements, bending moments, shear and axial forces are computed. A weighted evaluation of the …
The Use Of Pyrolized Carbon Black As An Additive (Part 3: Air Cooled Furnace Slag), Kwan-Ho Lee, C. W. Lovell, Rodrigo Salgado
The Use Of Pyrolized Carbon Black As An Additive (Part 3: Air Cooled Furnace Slag), Kwan-Ho Lee, C. W. Lovell, Rodrigo Salgado
JTRP Technical Reports
The purpose of this research was to characterize the fundamental properties and to evaluate the performance of asphalt mixtures modified by pyrolyzed carbon black (CBp) as an additive and air-cooled furnace slag as a coarse aggregate. Laboratory tests were conducted at INDOT and Koch Materials. The optimum binder content and the relationship of density and voids were determined from Marshall mix design. The rang of optimum binder content was 6.3% to 7.8%. The Marshall stability as a strength value and flow increased within the accepted ranges due to the inclusion of CBp. The gyratory tests were conducted by the US …
Use Of Coal Combustion Residues And Foundry Sands In Flowable Fill, Subnahmanya T. Bhat, C. W. Lovell
Use Of Coal Combustion Residues And Foundry Sands In Flowable Fill, Subnahmanya T. Bhat, C. W. Lovell
JTRP Technical Reports
The purpose of the present study is to investigate the use of waste foundry sand in flowable fill. However, the concepts developed are applicable to flowable fills containing any type of sand. Even though the flowable fill is presently popular as a trench filling material, this study addresses a much broader perspective in order to be able to develop uses of this material in geotechnical applications. In this research, only green sands were taken. The fly ash used was class F type. Flowability, hardening characteristics and 28-day unconfined compressive strength are studied. A rational approach the mix design of flowable …
Use Of Gps To Enhance Mapping By Photogrammetry, Robert D. Feeney, James Samuel Bethel, Boudewijn H. W. Van Gelder, Steve Johnson
Use Of Gps To Enhance Mapping By Photogrammetry, Robert D. Feeney, James Samuel Bethel, Boudewijn H. W. Van Gelder, Steve Johnson
JTRP Technical Reports
This research has sought to demonstrate the benefits of kinematic GPS in conjunction with photogrammetric aerial triangulation for mapping purposes. The work was performed with the existing INDOT aerial camera which is quite old, and while this affected the accuracy of the results, the demonstration of capability with a likely potential for excellent results was achieved. Ground point accuracies from the strip were in the sub-meter range with only a single control point. This is contrasted with full-model control requiring 50-80 control points for such a strip. In order to bring accuracies down to an acceptable level, i.e. sub decimeter, …
A Case Study In Synchronous Parallel Discrete Event Simulation, José Miguel Alonso, José A.B Fortes
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 …
Kenematic Tolerance Analysis, Leo Joskowicz, Elisha Sacks, Vijay Srinivasan
Kenematic Tolerance Analysis, Leo Joskowicz, Elisha Sacks, Vijay Srinivasan
Department of Computer Science Technical Reports
No abstract provided.
Transients In Power Systems, M. Belkhayat, J. Edwards, N. Hoonchareon, O. Marte, D. Stenberg, E. Walters
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 …
Bit-Sequences: A New Cache Invalidation Method In Mobile Environments, Jin Jing, Ahmed K. Elmagarmid, Abdelsalam Helal, Rafael Alonso
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.
Partitioned Data Management In Mobile Environments, Ahmed K. Elmagarmid, Jin Jing, Abdelsalam Helal, Rafael Alonso
Partitioned Data Management In Mobile Environments, Ahmed K. Elmagarmid, Jin Jing, Abdelsalam Helal, Rafael Alonso
Department of Computer Science Technical Reports
No abstract provided.
The New Jersey Machine-Code Toolkit, Norman Ramsey, Mary F. Fernáyesndez
The New Jersey Machine-Code Toolkit, Norman Ramsey, Mary F. Fernáyesndez
Department of Computer Science Technical Reports
No abstract provided.
An Evaluation Of Implementations Of The Cmb Parallel Simulation Algorithm On Distributed Memory Multicomputers, José Miguel, Agustin Arruabarrena, Ramon Beivide, José A..B. Fortes
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. …
On Nonlinear Circuit Components With N-Shaped Conductance Characteristics , Todd A. Wey, Lawrence L. Ogborn
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 …
Lightweight Write Detection And Checkpointing For Fine-Grained Persistence, Antony L. Hosking, J. Eliot B. Moss
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.
Sliced Configuration Spaces For Curved Planar Bodies, Elisha Sacks, Chandrajit Bajaj
Sliced Configuration Spaces For Curved Planar Bodies, Elisha Sacks, Chandrajit Bajaj
Department of Computer Science Technical Reports
No abstract provided.
Pattern Matching Image Compression: Algorithmic And Empirical Results, Mikhail J. Atallah, Yann Génin, Wojciech Szpankowski
Pattern Matching Image Compression: Algorithmic And Empirical Results, Mikhail J. Atallah, Yann Génin, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.
Inverse Pattern Matching, Amihood Amir, Alberto Apostolico, Moshe Lewenstein
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
Migrant Threads On Process Farms: Parallel Programming With Ariadne*, Edward Mascarenhas, Vernon Rego
Department of Computer Science Technical Reports
No abstract provided.
Finite Element Models For Sound Transmission Through Foam Wedges And Foam Layers Having Spatially Graded Properties, J. Stuart Bolton, Yeon June Kang
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.
Letter From Oklahoma: Bookish Or Boorish?, Tom Leonhart
Letter From Oklahoma: Bookish Or Boorish?, Tom Leonhart
Against the Grain
No abstract provided.