Now showing items 21-30 of 19256
Singular optimal atmospheric rocket trajectories
(Virginia Tech, 1986-10-05)
<p>Singular subarcs arise in quite a few problems of flight dynamics. The present study is devoted to the specific problem of ascent and acceleration of a vehicle in atmospheric flight in which a variable-thrust arc forms ...
Integrated urban transportation and land use modeling by application of system dynamics
(Virginia Tech, 1995-01-16)
The spatial allocation of land uses and vehicle route selection within an urban network are both dependent upon travel times between zones in an urban region. These location and accessibility components form the basis of ...
A prevention of significant deterioration case study
(Virginia Tech, 1993-02-05)
<p>The PSD permitting of new sources has drawn increasing public and governmental opposition. Much of the opposition is due to heightened environmental awareness. The issues are further compounded by inherent ...
Propagation prediction for PCS design in urban microwave channels
(Virginia Tech, 1993)
Using linear programming to improve unit planning on the Appalachian National Forests
(Virginia Polytechnic Institute and State University, 1974)
Analysis and Design of a DCM SEPIC PFC with Adjustable Output Voltage
(Virginia Tech, 2015-03-31)
Power Factor Correction rectifiers are widely adopted as the first stage in most grid-tied power conversion systems. Among all PFC converts for single phase system, Boost PFC is the most popular one due to simplicity of ...
Calcium-boro-saccharate-gluconate : studies of preparation, toxicology and effect on serum calcium level in cows
(Virginia Agricultural and Mechanical College and Polytechnic Institute, 1942)
The development and application of the load-stroke hysteresis technique for evaluating fatigue damage development in composite materials
(Virginia Tech, 1994-05-14)
A new experimental method was developed to measure the hysteresis loss during a fatigue test from the load and stroke signals of a standard servo-hydraulic materials testing system. The method was used to characterize ...
Litter Decomposition in Created and Adjacent Forested Wetlands of the Coastal Plain of Virginia
(Virginia Tech, 2002-05-30)
Litter decomposition is a poorly understood function of constructed and natural forested wetlands. This study compared rates of litter mass loss, changes in litter morphology, and associated macroinvertebrate populations ...