Engineering Commons^™

Sliding Mode For User Equilibrium Dynamic Traffic Routing Control, Pushkin Kachroo, Kaan Ozbay

Electrical & Computer Engineering Faculty Research

Presents a solution to the user equilibrium dynamic traffic routing (DTR) problem for a point diversion case using feedback control methodology. The sliding mode control technique which is a robust control methodology applicable to nonlinear systems in canonical form is employed to solve the user equilibrium DTR problem. The canonical form for this problem is obtained by using a feedback linearization technique, and the uncertainties of the system are countered by using the sliding mode principle. Simulation results show promising results.

Annual Assessment Of Customer Needs And Satisfaction, Patsy Anderson, Kris Hockensmith

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet, both through its own quality initiative and a statewide "Empower Kentucky" campaign, has a commitment to achieve new levels of quality in the development, construction and maintenance of highways. In order to gage progress, there is a need to establish a baseline of customer satisfaction with the current highway system, and determine needs as perceived by the users of the highway system. As a result, the University of Kentucky Transportation Center, Technology Exchange Unit, was contracted to conduct a customer needs and satisfaction survey. The objectives of this study are to:

A. Ascertain Kentucky highway users' …

Kentucky Transportation Cabinet: Annual Assessment Of Customer Needs And Satisfaction: Mail Survey, Patsy Anderson, Kris Hockensmith

Kentucky Transportation Center Research Report

The Kentucky Transportation Cabinet, both through its own quality initiative and a statewide "Empower Kentucky" campaign, has a commitment to achieve new levels of quality in the development, construction and maintenance of highways. In order to gage progress, there is a need to establish a baseline of customer satisfaction with the current highway system, and determine needs as, perceived by the users of the highway system. As a result, the University of Kentucky Transportation Center, Technology Exchange Unit, was contracted to conduct a customer needs and satisfaction survey. The objectives of this study are to:

A. Ascertain Kentucky highway users' …

Analysis Of Safe Separation Distances From Natural Gas Transmission Pipelines, James Stephen Haklar

Dissertations

Accidental rupture of natural gas transmission pipelines with subsequent ignition of the escaping gas can result in the loss of life and property. In the United States, current means of protecting both the pipeline and the public include the establishment of class locations, in which specific pipeline design, construction and operation requirements must be attained. In addition, distances at which the pipelines can be safely set back from the community, called safe separation distances, have been developed in some European countries (e.g., Great Britain, the Netherlands) through use of risk assessment principles. However, to date there has been no simple, …

Characteristics Of Recycled Plastics And Applications For Highway Appurtenances, Keith Macbain

Theses

Recycling is gaining widespread support in many communities as an environmentally acceptable solution to the management of solid waste. The success of these recycling programs depends largely on the development of high-value end use for the recycled products. This research involves an experimental and analytical study on the development of high-value, high-volume end uses for recycled plastic shapes. The experimental part includes material tests to determine mechanical properties of various recycled plastics. A constitutive model is proposed and verified that can be used in characterization of recycled plastics. Bending tests of recycled plastic beams were performed to assess strength, stiffness …

Ole Miss Engineer 1997

Ole Miss Engineer

No abstract provided.

Bs News

Building Services Engineering

No abstract provided.

Flexural Behavior Of Thermoplastic Beams With And Without Frp Reinforcement, Hilmi Coskun

Civil & Environmental Engineering Theses & Dissertations

This thesis presents the results of an experimental and theoretical study of the flexural behavior of thermoplastic beams with and without fiber-reinforced plastic (FRP) rebars. Tests are conducted on commercially available thermoplastic beams known as Seatimber. The normal stress-strain relations of both the thermoplastic material and FRP rebars are obtained in tension and compression experimentally. These mechanical property curves are then used as part of the input for developing the theoretical moment-curvature relations using an iterative equilibrium procedure. The moment-curvature relations are in turn used for predicting the beam load-deflection curves via the central finite-difference procedure. Behavior predictions are made …

Modification Of Flow Model And Optimal Pumping Strategies For Capturing Tce And Dce Plumes Near Mission Drive, Wurtsmith Air Force Base, Michigan: Feasibility Study, Alaa H. Aly, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

Utah State University (USU) and Parsons Engineering Science (PES) were tasked by the Air Force Center for Environmental Excellence to:

( 1) Modify the three-dimensional basewide ground-water flow model for Wurtsmith Air Force Base (WAFS), Michigan (PES, 1997) based on recent investigation by ICF Kaiser (ICF).

(2) Develop contaminant transport models for OT-24 area TCE and DCE plumes. These models will use the same parameters that were used by ICF in their feasibility study ..

(3) Use the flow and transport models to develop optimal pumping strategies to achieve cleanup and capture of the plumes

1997 Safety Belt Usage Survey And Evaluation Of Effectiveness In Kentucky, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objective of this study was to establish 1997 safety belt and child safety seat usage rates in Kentucky. The 1997 survey documents the continuing results from enacting a statewide mandatory safety belt law in 1994. Data were collected at 100 sites and combined based on vehicle miles traveled for a given type of highway, rural or urban location, and county population category. Also included in the report is an analysis of accident records evaluating the effectiveness of safety belts.

The data show that the usage rate has stabilized at a level slightly below the high value which occurred in …

Luke Afb Water Rights Ramifications Of The Survey Report For The Gila River Indian Reservation, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

The subject Arizona Department of Water Resources (ADWR) report is a thorough preliminary effort at determining how much water is needed to irrigate all practicably irrigable acreages (PIA) on the Gila River Indian Reservation (GRIR). ADWR identified 178,880 acres suitable for irrigation. An existing Gila River Indian Community (GRIC) Master Plan previously identified 146,330 acres suitable for irrigation (requiring 771 ,600 acre-feet of water per year). ADWR compared the two sets of acreages, and identified 129,030 acres common to both.

Stabilization Of An Airport Subgrade Using Hydrated Lime And Fly Ash, Tony L. Beckham, Tommy C. Hopkins

Kentucky Transportation Center Research Report

A 457-m (1,500-ft) runway pavement extension is planned for the Georgetown-Scott County Airport (Marshall Field). The clay subgrade of the existing paved runway was stabilized with six percent (dry weight) hydrated lime. A request was made by the Kentucky Transportation Cabinet, Division of Aeronautics, to determine the feasibility of replacing a percentage of the hydrated lime stabilizer with fly ash for the extended runway subgrade. Kentucky Highway Investigative Task No. 27 was issued by the Transportation Cabinet to fund a laboratory study to determine the effects of partially replacing lime with Type F fly ash (FA). Using fly ash to …

Roadway Incident Emergency Response: Workshop Summary And Detour Maps, Jerry G. Pigman, Kenneth R. Agent, David H. Cain

Kentucky Transportation Center Research Report

Delays associated with incidents and accidents on heavily traveled highways have been recognized as a major inconvenience and a burden on the driving public. Heavy traffic volumes on interstates in Kentucky result in significantly increased probability for delay occurrences. When there is an occurrence which disrupts traffic, the adverse effects are widespread. High volumes of trucks use the north-south corridors in the state and delays can produce significant costs to both shippers and users of products being shipped.

Many efforts are underway to address the problems associated with congestion; including improved traffic management techniques and applications of advanced technology. A …

Analysis Of Traffic Accident Data In Kentucky (1992 - 1996), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

This report includes an analysis of traffic accident data in Kentucky for the years of 1992 through 1996. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical numbers and rates of accidents were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky's procedure to identify locations that have abnormal rates or numbers of accidents.

The other primary objective of this study was to provide data which can be used in the preparation of the problem identification portion of Kentucky's Annual Highway Safety …

Stabilization Of Subgrade Soil Using Hydrated Lime Product, Tony L. Beckham, Tommy C. Hopkins

Kentucky Transportation Center Research Report

The Carbide/Graphite Group Inc. requested the University of Kentucky, Kentucky Transportation Center to do a feasibility study to determine if a hydrated lime product produced at their Calvet City, Kentucky facility can be used as a soil subgrade stabilizing agent.

Bs News

Building Services Engineering

No abstract provided.

Local Refinement Of Three-Dimensional Finite Element Meshes, M. L. Staten, Norman L. Jones

Faculty Publications

Mesh refinement is an important tool for editing finite element meshes in order to increase the accuracy of the solution. Refinement is performed in an iterative procedure in which a solution is found, error estimates are calculated, and elements in regions of high error are refined. This process is repeated until the desired accuracy is obtained.

Much research has been done on mesh refinement. Research has been focused on two-dimensional meshes and three-dimensional tetrahedral meshes ([1] Ning et al. (1993) Finite Elements in Analysis and Design, 13, 299–318; [2] Rivara, M. (1991) …

Modeling Improvements For Water Supply Forecasting In The Columbia River Basin, Daniel Albert Buller

Dissertations and Theses

The purposes of this study were twofold. The first was to explore possible improvements that could be made over existing methods by applying alternative modeling approaches, including the one developed by Garen to forecast runoff volumes in the Columbia River at The Dalles, Oregon. The second was to use the Southern Oscillation as one of the variables to forecast spring and summer runoff and to evaluate whether this variable adds significant information early in the season before any snow has accumulated. The Columbia River basin's mountainous topography and northern latitude are ideally suited for water supply forecasting because much of …

Ccfss Technical Bulletin August 1997, Wei-Wen Yu Center For Cold-Formed Steel Structures

CCFSS Technical Bulletins (1993 - 2020)

No abstract provided.

Field Evaluation Of Ultrasonic Method For Assessing Well Seals, Nazli Yesiller, Craig H. Benson, Tuncer B. Edil

Civil and Environmental Engineering

Field tests were conducted in three boreholes using an ultrasonic testing method to evaluate its ability to assess contact between the seal and riser (casing). The ultrasonic method is used inside the riser without disturbing the riser, seal, or formation soil. The risers were 50-mm-diameter (2-inch) Schedule 40 steel pipes that are used for ground water monitoring wells. Different types of seals were placed around the risers and defects were purposely introduced in the seals to test the ultrasonic method. The ultrasonic response changed as the neat-cement seals cured or hydration of the bentonite seals changed. When adequate moisture was …

Guide To Revenue Calculations: Local Option Highway User Tax 1997, Jon D. Fricker

Indiana Local Technical Assistance Program (LTAP) Publications

This guide is provided to explain the output generated by the computer programs, and to suggest ways in which the results can be adapted to specific LOHUT proposals before a County Council. HERPICC neither endorses nor opposes passage of a LOHUT. The revenue projections it provides are intended to be an aid to well-informed decision-making on the part of a county’s citizens and its County Council.

A Guide For Designing With Standing Seam Roof Panels, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Evaluation Of Pavement Edge Drains And Headwalls On I-264 (Watterson Expressway) Jefferson County, L. John Fleckenstein, Brad W. Rister, David L. Allen

Kentucky Transportation Center Research Report

This report documents the findings from the investigation of pavement edge drains and headwall conditions on six Watterson Expressway Projects in Jefferson County. These projects include the Newburg Road Interchange, Bardstown Road Interchange, Taylorsville Road Interchange, Breckinridge Road Interchange, l-64 1nterchange, and Shelbyville Road Interchange. The study was initiated due to an on-site inspection by Federal Highway Administration, Kentucky Transportation Center, and District 5 personnel who indicated several of the outlet pipes were clogged or collapsed. It was suggested by Federal Highway Administration personnel that a mini pipeline inspection camera be used to verify the conditions of the outlet pipes …

Ccfss News August 1997, Wei-Wen Yu Center For Cold-Formed Steel Structures

CCFSS Newsletters (1999 - 2008)

No abstract provided.

Studying Initiation And Growth Of Shear Cracks In Reinforced Concrete Beams Using Full-Field Digital Imaging, Daniel C. Jansen, Sokhwan Choi, Surendra P. Shah

Civil and Environmental Engineering

The mechanisms which lead to shear failure of longitudinally reinforced concrete beams are complex and often misunderstood. In this paper, a combination of a special closed loop test technique and machine vision are applied to tests on two reinforced concrete beams failing in shear: one made of normal strength concrete and the second of high strength concrete. To control the progression of the shear crack, a closed-loop test technique was devised and employed such that the crack propagation was stable even during the post peak. To locate the crack and to measure the crack displacements, machine vision, a nondestructive measuring …

Failure Case Studies And Ethics In Engineering Mechanics Courses, Norbert J. Delatte

Civil and Environmental Engineering Faculty Publications

Often, engineering students do not study engineering failures or discuss ethics until they take upper division undergraduate courses or graduate level courses. One drawback to this approach is that problems analyzed in introductory courses are often contrived, uninteresting, and bear little relation to the problems encountered in engineering practice. At the point when educators need to grab the student's interest in engineering most, they should show the excitement and relevance of the profession. Another is that the students encounter the issues of ethics, responsibility, and accountability that are often highlighted by a failure, late in their engineering education. As a …

Bs News

Building Services Engineering

No abstract provided.

The Detoxification Of Petroleum Contaminated Coastal Plain Sandy Soil Using An Amended Vermicomposting Approach, John Charles Kraemer

Health Services Research Dissertations

This study explores the feasibility of utilizing an amended vermicomposting treatment approach for detoxifying petroleum hydrocarbon contaminated sandy soil. The bench-scale testing of gasoline and diesel contaminated soil using three test soil vessels and one control soil vessel was performed in a laboratory setting for a six week time period. The control soil received no treatment other than distilled water to maintain soil moisture. Treatment 1 consisted of direct application of liquid municipal biologic sludge on a weekly basis. Treatment 2 consisted of the addition of 30 Eisenia foetida earthworms and distilled water. Treatment 3 consisted of direct application of …

1997 Calibration Of Flow Model And Optimal Pumping Strategies To Capture Tce Plume At Travis Afb, Ca, Richard C. Peralta, A. H. Aly, J. Atkinson, J. Williams

Civil and Environmental Engineering Faculty Publications

The objective of this study was to develop a ground-water model that can be used in conjunction with an optimization model to optimize the containment and remediation of ground water contaminated with organic compounds at Travis AFB, California (TAFB). Based on studies by WESTON (Roy F. Weston, Inc.), RADIAN (Radian Corporation), and others, the major ground-water quality problem is a plume of TCE that originates at the Oil Spill Area (OSA) and bas migrated to the south and east under the runway. The immediate remediation objective is to stop the movement of the plume.

Summary Of Results Of 1995 Field Evaluations Of Long Life Pavement Marking Materials, Kentucky Transportation Center

Kentucky Transportation Center Research Report

This report completes the summary of the results of data collected as part of the 1995 field and laboratory evaluations of pavement marking materials for the National Transportation Product Evaluation Program (NTPEP). A previous report summarized the data for the first year after placement of these materials (AASHTO's National Transportation Product Evaluation Program, Report 96, NTPEP 121, October 1996). Data for the second year for the long life pavement marking materials are given in this report.