196,045 research outputs found
Assessing Benefits in Vehicle Speed and Lateral Position when Chevrons with Full Retroreflective Sign Posts are Implemented on Rural Horizontal Curves
No full textDriving a horizontal roadway curve requires a change in vehicle alignment and a
potential reduction in speed. Curves may present a challenging situation during adverse
conditions or to inattentive drivers. Chevron signs provide advanced warning and
positive guidance throughout the curve. Some agencies place supplemental
retroreflective material on sign posts to enhance the signs? conspicuity and visibility.
The objective of this study was to determine any incremental benefits in vehicle speed
and lateral lane position when retroreflective material was applied to Chevron sign posts
(ChevFull). This study analyzed three separate evaluation scenarios in a before, after,
and after-after experimental design. There was an existing Baseline evaluation with no
vertical delineation, a standard Chevron evaluation, and an experimental ChevFull
treatment evaluation. Data collection measured vehicle speed and lateral position data at
the point of curvature and mid-point on two separate curves. Findings showed that both
Chevrons and the ChevFull treatment moved vehicles away from oncoming traffic by
about 15 inches. Overall, there was little difference between the lateral position findings
of the two Chevron treatment scenarios. Chevrons achieved a 1.28 MPH reduction in
mean vehicle speed from the Baseline evaluation and the ChevFull treatment obtained a
2.20 MPH reduction. The findings determined that the benefits of the ChevFull
treatment were not substantial. The author recommends that the MUTCD should
continue to present the ChevFull treatment as an optional delineation tool. Based on this
research, the author does not recommend any changes to the MUTCD
Field location & marking of no-passing zones due to vertical alignments using the global positioning system
No full textPassing on two-lane roadways is one of the most difficult movements a driver may
perform and guidance on where passing maneuvers are prohibited is given by the
location of no-passing zones. Currently the processes for identifying no-passing zone
locations can be daunting and many practices require work crews to operate in the
roadway creating potentially hazardous situations. Due to these challenges new
alternatives need to be developed for the safe, accurate, and efficient location of nopassing
zones on two-lane roadways.
This thesis addresses the use of Global Positioning System (GPS) coordinates to
evaluate sight distance along the vertical profile of roadways to provide an alternative
for an automated no-passing zone location system. A system was developed that
processes GPS coordinates and converts them into easting and northing values, smoothes
inaccurate vertical elevation data, and evaluates roadway profiles for possible sight
restrictions which indicate where no-passing zones should be located. The developed automated no-passing zone program shows potential in that it identifies
the general location of no-passing zones as compared to existing roadway markings.;
however, as concluded by the researcher, further evaluation and refinement is needed
before the program can be used effectively in the field for the safe, accurate, and
efficient location of no-passing zones
Dunbaugh, Frank M.
No full textBody cremated. Sallie B. Dumbaugh - wifehttps://stars.library.ucf.edu/cfm-ch-memoranda-1939/1131/thumbnail.jp
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Graduate Certificate Program in transportation planning. Phase 2
No full textFinal report of a project to expand the graduate certification program in transportation planning at Texas A & M University to include an Executive Certificate Program by distance
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Developing an Interdisciplinary Certificate Program in Transportation Planning
No full textFinal report of a project to develop and implement a graduate certification program in transportation planning at Texas A & M University
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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