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VTETD 檢索結果共 19439 筆,本頁資料從第 145 筆到第 156 筆

A review of behavioral rock properties used for input to the finite element method are summarized. Rock properties presented in the literature were primarily obtained from laboratory specimens. Methods to determine applicable field properties via testing, calculations and. empirical correlations are included.

Suggested behavioral properties of the structural c....


By Carl Philip Benson-Civil Engineering-VT-masters-2013-11-15
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Safe disposal of contaminated dredged material has become a significant issue especially as public environmental awareness and concerns increase. Solidification/ stabilization technology potentially may provide for a safer, more effective and more economical means of disposal.

This research investigated the technical feasibility of applying solidification/stab....


By James Michael Betteker-Environmental Science and Engineering-VT-masters-2013-11-15
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Past efforts at implementing Load Spectrum Generation and Neuber Control have centered around minicomputers and analog circuits. The use of a personal computer to implement the tasks is presented. On implementation of the load Spectrum Generation software, the response of the Materials Testing System was investigated for distortion and attenuation. In particular, the....


By Sanjay Bhatia-Electrical Engineering-VT-masters-2013-11-15
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Aircraft Cruise Performance is examined by using energy-state modelling to investigate fuel-range optimal trajectories. Chattering controls are considered appropriate when the hodograph is non-convex.

Classical steady-state cruise, simple chattering-cruise and the extended chattering-cruise models are studied as constrained parameter-optimization problems. The....


By Pradeep Bhardwaj-Aerospace Engineering-VT-masters-2013-11-15
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Nine patients with intermittent claudication diagnosed at least 6 months before this investigation were evaluated to determine the effects of walking exercise on serum lactate accumulation (HLa, mmol-l -l), ankle pressure index (API), total treadmill time (sec), and onset of leg pain (sec) in the most severely diseased limb. Subjects were evaluated via a functional walk....

By Allen M. Bostian-Health and Physical Education-VT-masters-2013-11-15
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In recent years, a great deal of interest has been shown in developing methods for preparing superâclean coal containing less than 2% ash and 0.5% sulfur. New techniques for recovering fine coal, such as microâbubble flotation, can achieve the desired result provided mineral matter is sufficiently liberated. To achieve sufficient liberation, however, it is often neces....

By Michael Duane Brown-Mining and Minerals Engineering-VT-masters-2013-11-15
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Serum cortisol and immunoglobulin G (IgG> concentrations were measured to investigate the relationship between vitamin A status and immune function in lambs. Twenty-four crossbred ewe lambs were each fed 900 g·d-1 of a caroteneâdeficient diet composed of 95.5% whole oats, 3% molasses, .5% trace mineral salt and 1% limestone. All lambs were injected monthl....

By Nicholas Joseph Bruns-Animal Science-VT-masters-2013-11-15
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During 1984-85 I investigated population ecology and habitat relationships of river cooters (Pseudemys concinna) in the New River Gorge National River (NRGNR), West Virginia. Cooter colonies occurred in 3 pool habitats characterized by slow current velocities (x=0.22m/s), shallow water (0-2m), aquatic macrophyte beds, and basking sites.

The estimated a....


By Kurt Andrew Buhlmann-Fisheries and Wildlife Sciences-VT-masters-2013-11-15
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The surface chemical properties of Sheet Molded Composite (SMC) materials, formulated to contain polyester binder, calcium carbonate filler, and glass fibers, have been investigated with emphasis on how the surface properties are related to adhesion. These surface properties, relative elemental concentrations and their chemical states, were studied using x-ray photoelec....

By Chuck Burtoff-Chemistry-VT-masters-2013-11-15
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The investment decision-making techniques, financing methods and equipment needs of 1,818 sawmills and pallet manufacturers in the Eastern United States were studied. Information was gathered using a mail survey and 581 usable responses were received.

It was found that discounted cash flow techniques have not been extensively adopted by the firms under study a....


By Robert Bush-Accounting and Information Systems-VT-masters-2013-11-15
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The purpose of this study was to explain the effect of a lottery-based incentive program on employee absenteeism. Based on a review of the relevant literature, seven variables were examined: (1) past attendance behavior; (2) employee liking for the lottery program; (3) employee perceptions of the contingency of rewards; (4) employee perceptions of acceptable levels of a....

By Andrienne C. M. Calderon-Business Administration-VT-masters-2013-11-15
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New U-Pb zircon ages from plutons in the Charlotte belt of the southern Appalachians have provided evidence of Cambro-Ordovician and Siluro-Devonian magmatic activity. Several U-Pb zircon ages of Cambro-Ordovician plutons predate their RbâSr whole rock ages by as much as 60 m.y., suggesting a post emplacement disturbance of the Rb-Sr isotopic systems. Comparison of geo....

By Erik A. Hund-Geology-VT-masters-2013-11-15
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