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1998

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Articles 1351 - 1354 of 1354

Full-Text Articles in Engineering

A Tool For Evaluating Access Control On High Speed Urban Arterials, Part Ii: User's Manual, Henry C. Brown, Samuel Labi, Andrzej P. Tarko, Jon D. Fricker Jan 1998

A Tool For Evaluating Access Control On High Speed Urban Arterials, Part Ii: User's Manual, Henry C. Brown, Samuel Labi, Andrzej P. Tarko, Jon D. Fricker

JTRP Technical Reports

A highway system serves two needs: mobility and accessibility. Access control techniques are used to restrict access to the highway and improve vehicle flow. The objective of this research was to develop a comprehensive procedure to evaluate access control alternatives. The procedure includes the design and quantitative evaluation of alternatives to select the best one. Evaluation of each alternative includes prediction of turning volumes, delays, crash rates, and economic effectiveness. Several existing models predict traffic delays for signalized intersections and for minor streams at unsignalized intersections. Models are needed to predict delays of arterial streams caused by minor streams at …


Integration Of Real-Time Air Pollution Parameters Into The Decision Making Process Regarding Highway Construction Work Zone Traffic Flow Requirements (Phase 1), Ouattara Fatogoma, Todd A. Premo, Robert Bertram Jacko Jan 1998

Integration Of Real-Time Air Pollution Parameters Into The Decision Making Process Regarding Highway Construction Work Zone Traffic Flow Requirements (Phase 1), Ouattara Fatogoma, Todd A. Premo, Robert Bertram Jacko

JTRP Technical Reports

The Midac Fourier Transform Infrared air monitoring system was used to measure real-time vehicular exhaust emission concentrations of carbon monoxide (CO) and hydrocarbons (HCs) during the Purdue Vehicle Emission Monitoring and Modeling Project (PVEMP) conducted in spring and summer 1997. The experiments took place on the Borman Expressway, in Gary. Indiana and on 1-65, south of Lafayette, Indiana Concurrently, two speed-readings were acquired from the passing vehicles in the vicinity of the air monitoring system using a hand-held laser gun. The speeds were integrated to determine the speeds and accelerations of the passing vehicles at the spectrometer. An 8-mm camcorder …


Buckets: Aggregative, Intelligent Agents For Publishing, Michael L. Nelson, Kurt Maly, Stewart N. T. Shen, Mohammad Zubair Jan 1998

Buckets: Aggregative, Intelligent Agents For Publishing, Michael L. Nelson, Kurt Maly, Stewart N. T. Shen, Mohammad Zubair

Computer Science Faculty Publications

Buckets are an aggregative, intelligent construct for publishing in digital libraries. The goal of research projects is to produce information. This information is often instantiated in several forms, differentiated by semantic types (report, software, video, datasets, etc.). A given semantic type can be further differentiated by syntactic representations as well (PostScript version, PDF version, Word version, etc.). Although the information was created together and subtle relationships can exist between them, different semantic instantiations are generally segregated along currently obsolete media boundaries. Reports are placed in report archives, software might go into a software archive, but most of the data and …


Creating A Canonical Scientific And Technical Information Classification System For Ncstrl+, Melissa E. Tiffany, Michael L. Nelson Jan 1998

Creating A Canonical Scientific And Technical Information Classification System For Ncstrl+, Melissa E. Tiffany, Michael L. Nelson

Computer Science Faculty Publications

The purpose of this paper is to describe the new subject classification system for the NCSTRL+ project. NCSTRL+ is a canonical digital library (DL) based on the Networked Computer Science Technical Report Library (NCSTRL). The current NCSTRL+ classification system uses the NASA Scientific and Technical (STI) subject classifications, which has a bias towards the aerospace, aeronautics, and engineering disciplines. Examination of other scientific and technical information classification systems showed similar discipline-centric weaknesses. Traditional, library-oriented classification systems represented all disciplines, but were too generalized to serve the needs of a scientific and technically oriented digital library. Lack of a suitable existing …