Now showing items 1-10 of 1509
Eco-Driving in the Vicinity of Roadway Intersections - Algorithmic Development, Modeling and Testing
(Virginia Tech, 2014-05-06)
Vehicle stops and speed variations account for a large percentage of vehicle fuel losses especially at signalized intersections. Recently, researchers have attempted to develop tools that reduce these losses by capitalizing ...
A finite element analysis of dissolved oxygen drawdown and sulfate production in strip mine spoil dams due to pyritic chemical reaction.
(Virginia Tech, 1975-05-06)
The problem of dissolved oxygen drawdown and sulfate production in strip mine spoil dams due to chemical reaction between an excess of pyrite, water, and dissolved oxygen is investigated. A finite element analysis is used ...
VITASCOPE: Extensible and Scalable 3D Visualization of Simulated Construction Operations
(Virginia Tech, 2003-04-14)
In the domain of operations design and analysis, the ability to see a 3D animation of processes that have been simulated allows for three very important things: 1) The developer of a simulation model can ascertain that ...
A Demand Driven Airline and Airport Evolution Study
(Virginia Tech, 2009-05-11)
The events of September 11,2001 followed by the oil price hike and the economic crisis of 2008, have lead to a drop in the demand for air travel. Airlines have attempted to return to profitability by cutting service in ...
Development and analysis of computer aided design and drafting software for storm sewers
(Virginia Polytechnic Institute and State University, 1987)
Seeing Beyond Service - Redefining the Problem of Water and Sanitation Service Delivery in Resource-Limited Settings to Enable Effective Solutions
(Virginia Tech, 2010-07-22)
The purpose of this study was to examine the effectiveness of water and sanitation service delivery in resource-limited settings using two different social theories (modernization and world system). Understanding that ...
Methodology for Using a Non-Linear Parameter Estimation Technique for Reactive Multi-Component Solute Transport Modeling in Ground-Water Systems
(Virginia Tech, 2006-11-14)
<p> For a numerical or analytical model to be useful it should be ensured that the model outcome matches the observations or field measurements during calibration. This process has been typically done by manual perturbation ...
Experimental and Analytical Studies of the Behavior of Cold-Formed Steel Roof Truss Elements
(Virginia Tech, 2005-11-03)
Cold-formed steel roof truss systems that use complex stiffener patterns in existing hat shape members for both top and bottom chord elements are a growing trend in the North American steel framing industry. When designing ...
Three-dimensional finite element analysis of sheet-pile cellular cofferdams
(Virginia Tech, 1991-12-01)
The conventional design methods for sheet-pile cellular cofferdams were developed in the 1940's and 1950's based on field and limited experimental observations. The analytical techniques of the day were unable to account ...
Response of Wide Flange Steel Columns Subjected to Constant Axial Load and Lateral Blast Load
(Virginia Tech, 2006-10-23)
The response of wide flange steel columns subjected to constant axial loads and lateral blast loads was examined. The finite element program ABAQUS was used to model W8x40 sections with different slendernesses and boundary ...