Now showing items 1-10 of 1497
New Framework for Real-time Measurement, Monitoring, and Benchmarking of Construction Equipment Emissions
(Virginia Tech, 2014-06-29)
The construction industry is one of the largest emitters of greenhouse gases and health-related pollutants. Monitoring and benchmarking emissions will provide practitioners with information to assess environmental impacts ...
The effect of high purity oxygen on the activated sludge process
(Virginia Polytechnic Institute and State University, 1975)
Quantification of Morphological Characteristics of Aggregates at Multiple Scales
(Virginia Tech, 2015-01-21)
Properties of aggregates are affected by their morphological characteristics, including shape factors, angularity and texture. These morphological characteristics influence the aggregate's mutual interactions and strengths ...
Digital Mix Design for Performance Optimization of Asphalt Mixture
(Virginia Tech, 2015-03-27)
Asphalt mix design includes the determination of a gradation, asphalt content, other volumetric properties, the evaluation of mechanical properties and moisture damage potentials. In this study, a computational method is ...
Modeling Driver Behavior at Signalized Intersections: Decision Dynamics, Human Learning, and Safety Measures of Real-time Control Systems
(Virginia Tech, 2015-01-24)
Traffic conflicts associated to signalized intersections are one of the major contributing factors to crash occurrences. Driver behavior plays an important role in the safety concerns related to signalized intersections. ...
Operational Analysis of Alternative Intersections
(Virginia Tech, 2015-09-09)
Alternative intersections and interchanges, such as the diverging diamond interchange (DDI), the restricted crossing u-turn (RCUT), and the displaced left-turn intersection (DLT), have the potential to both improve safety ...
Effect of surface modifications on biodegradation of nanocellulose and microbial response
(Virginia Tech, 2015-09-22)
History teaches us that novel materials, such as chlorofluorocarbon and asbestos, can have dire unintended consequences to human and environmental health. The exponential growth of the field of nanotechnology and the ...
Multi-hazard performance of steel moment frame buildings with collapse prevention systems in the central and eastern United States
(Virginia Tech, 2015-06-05)
This dissertation discusses the potential for using a conventional main lateral-force resisting system, combined with the reserve strength in the gravity framing, and or auxiliary collapse-inhibiting mechanisms deployed ...
The Seismic Behavior of Steel Structures with Semi-Rigid Diaphragms
(Virginia Tech, 2015-09-10)
This thesis investigates the torsional performance of steel structures with and without rigid diaphragm constraints through numerical simulations and evaluates the appropriateness of relevant design provisions in current ...
Quantitative Approach to Select Energy Benchmarking Parameters for Drinking Water Utilities
(Virginia Tech, 2014-06-04)
Energy efficiency is currently a hot topic on all regional, national, and global stages. Accurate measurements on how energy is being used over a period of time can improve performance of the drinking water utility ...