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Now showing items 1-10 of 11
Nonlinear dynamic finite element analysis of steel frames with semirigid joints.
(1999)
In this study a nonlinear dynamic analysis computer program for planar steel frames with semi-rigid connections is developed. The semi-rigid connections are modeled as a massless rotational spring element. This element has ...
Utilization of coal combustion by-products for in situ treatment of acidic mine waters.
(1999)
The goal of this research was to determine how to effectively treat AMD in situ using CCBs and to develop a better understanding of the chemical and physical processes involved with the treatment. AMD treatment within the ...
An investigation of alcohol tracer partition coefficients and a study of simulations.
(1999)
The secondary objective of this research was to demonstrate the advantages of the UTCHEM simulator in developing effective design strategies for hum tests and surfactant flooding processes. During a column study, there was ...
Evaluation of resilient moduli and layer coefficients of aggregate materials for AASHTO flexible pavement design.
(1998)
Layer coefficients were calculated for use in the design of flexible pavements by using the AASHTO design methodology. Multiple linear regression models were developed for predicting the layer coefficients of the two ...
A qualitative model for designing and implementing effluent trading programs.
(1999)
Effluent trading programs (ETPs) have been proposed as cost-effective alternatives to command-and-control regulations for surface water quality management. In addition to reducing environmental compliance costs, ETPs may ...
Iron and sulfur microbial processes applied to the biodegradation of organic contaminants in groundwater.
(1998)
This research emphasizes microbial/mineral interactions associated with Fe$\sp{3+}$ and SO$\sb4\sp{2-}$ reduction. Simplified methods are developed to evaluate Fe$\sp{3+}, $ Fe$\sp{2+}, $ and S mineral species. These ...
Air quality cumulative effects assessment for United States Air Force bases.
(1998)
An air quality CE significance rating procedure was developed through adaptation of existing EIA significance evaluation methods combined with expert opinion and professional judgment. The procedure includes 18 factors for ...
Characterization of cement-kiln-dust stabilized base/subbase aggregate.
(1998)
In this study, a laboratory testing program was undertaken to determine the resilient modulus and other properties of a cement-kiln-dust (CKD) stabilized aggregate that are important to the design and rehabilitation of ...
Quantification of chlorophyll in small reservoirs using airborne video imagery.
(1998)
The primary objective of this study was to develop a rapid, economic method of assessing water quality and productivity in surface impoundments. Airborne video cameras equipped with narrow band filters were used to assess ...
Determination of leakage from subsurface containment systems using informational entropy and hydraulic signature assessment methods.
(1998)
The use of physical and hydraulic containment systems for the isolation of contaminated ground water and aquifer materials associated with hazardous waste sites has increased during the last decade. The existing methodologies ...