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Dissertations / Theses on the topic 'LD5655.V855 1994.S537'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Sharman, Kimberly. "A broadcast-based coordination scheme for a system of autonomous mobile robots." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42057.

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A method for coordinating a homogeneous swarm of autonomous mobile robots is presented. The broadcast-based coordination scheme was developed for the Army Ant swarm—a system of small, relatively inexpensive mobile robots that can accomplish complex tasks by cooperating as a team. The primary drawback of the Army Ant system is that the absence of a central supervisor poses difficulty in the coordination and control of the agents. Our coordination scheme provides a global "group dynamic" that controls the actions of each robot using only local interactions. Coordination of the swarm is achieve

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2

Sherchand, Bageshwari. "Determinants of non-farm self-employment in rural Virginia." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42103.

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This research uses primary cross-sectional non-farm-household data collected from Virginia’s non-metropolitan areas for the 1989 year. The primary objective of this research is to identify the factors that influence the probability of being self-employed. Using an effective sample of 851 household heads, a model consisting of two dichotomous probit equations are specified and developed to determine the statistically significant factors that influence, first, the probability of labor force participation, and then the likelihood of being self-employed. The probit equations are estimated by the m

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3

Shao, Ming. "Modelling simultaneous heat and mass transfer in wood." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42073.

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The fundamental and quantitative study of heat and mass transfer processes in wood plays an important role for understanding many important production processes, such as wood drying and hot-pressing. It will help us improve the existing products and production techniques and develop new manufacturing technology. The most difficult aspect of the study is the complicated interactions of heat and mass transfer mechanisms. Extensive characterization of these physical processes using a strictly experimental approach is extremely difficult because of the excessively large number of variables that mu

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4

Shapiro, Jon M. "The role of cultural sensitivity and trust in relational marketing: an analysis of buyer/seller relationships in the Asian Pacific Rim." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/40241.

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5

Shah, Samir Harshadrai. "Computer aided analyses of symmetrically loaded thin cylindrical shell using transfer matrix method." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-10022008-063134/.

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6

Sipe, Cody L. "Estimation of stability reliability for determination of peak VO₂ in young adults on an inclined stepper and treadmill." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/46427.

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The inclined stepper is a novel piece of exercise equipment that is designed to offer precise control over a wide range of loading levels and exercise speeds by simulating an inclined stepping motion (21). The purpose of this study was to evaluate the relationship and test-retest reliability of the stepper ergometer. Twenty-eight healthy volunteers (age: 23.5 ± 3.6 yrs) completed a graded treadmill (TM) and two graded, step (SI, SII) ergometry tests to assess maximal oxygen consumption (V̇O₂max). The order of these tests was randomized. Expired gases were analyzed using the Medical Graphics CP

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7

Shaw, Melissa Jane. "A comparison of preservation planning techniques : two case studies /." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02232010-020022/.

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8

Shakoor, Arif. "Crop rotation planning using simulated annealing." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02232010-020018/.

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9

Simington, Paulette Rodgers. "One school's process for problem solving." Diss., This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-10042006-143916/.

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10

Slank, Kristine Lynn. "Effects of emotional state and food novelty on preschool children's acceptance of food." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/40333.

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Humans and other animals typically consume less of novel foods than of familiar ones, a phenomenon termed ingestional neophobia. Young children display especially high levels of neophobia, spitting out new foods but accepting those same foods after familiarization. Rejection of novel foods presumably reflects the aversiveness of the food's novel sensory cues, which thereby occasions withdrawal. Familiar foods typically evoke acceptance, suggesting that familiar foods are not categorically aversive. According to a biphasic model of emotion, negative affective behaviors (e.g., withdrawal) are en

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11

Shea, Lauren Elizabeth. "ZnGa2 O4 and ZnGa2 O4: Mn2+ for potential use in vacuum fluorescent displays." Thesis, Virginia Tech, 1993. http://hdl.handle.net/10919/40552.

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Zinc gallate and Mn2+ -activated zinc gallate were identified as potential low-voltage cathodoluminescent phosphors for use in vacuum fluorescent displays. The stability of these oxide phosphors in high-vacuum and absence of corrosive gas emission under electron bombardment, offer advantages over commonly used sulfide phosphors. A low-voltage cathodoluminescence spectrophotometer was _ developed for phosphor characterization. Sample brightness was measured as a function of anode voltage (10-300 VDC). The effects of activator concentration, phosphor layer thickness, deposition process, and i

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12

Shapeero, Michael P. "Premature audit sign-offs and the underreporting of chargeable time in public accounting : examination of an ethical decision making model /." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-151528/.

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13

Siczka, John Stephen. "The characterization of dissolved organic material in natural waters and the phase-change behavior of organic matter during chemical coagulation." Thesis, This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-08252008-162755/.

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14

Shapiro, Stephen Mark. "Development, evaluation, and implementation of safety measures to prevent marine accidents." Master's thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01122010-020105/.

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15

Shankar, Udaya. "Implementation of digital modulation techniques using direct digital synthesis." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-03302010-020333/.

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16

Skinner, Mary Lou. "Revised manual for student activity accounting for Virginia's public schools." Diss., This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-10052007-143403/.

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17

Shooter, Steven B. "Conceptual manipulator design for limited access workspaces." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-05092009-040612/.

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18

McLamore, Dolores Sherita. "Determination of the relative stereochemistry of adducts resulting from the addition lithium dienolates to Michael acceptors." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/43137.

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The addition of the lithium dienolate of ethyl crotonate to 2-cyclopentenone was studied to determine the stereochemical outcome of this Michael addition. Proof of the stereochemistry was provided via the unambiguous synthesis and comparison of ketone 73 from norcamphor 85.<br>Master of Science

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19

Wunder, Steven. "Between Earth and Sky." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36728.

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Architecture lies in the relationship between material and structure, in particular the poetic of constructed form. By poetic, I am referring to, as Kenneth Frampton put it, "the original Greek sense of poesis as an act of making and revealing." Through the dialogue of constructive elements, materials, the making of form and the resolution of structural forces, beauty and meaning arise. "Tectonics" is defined as "pertaining to building or construction in general" especially in reference to architecture. Gottfried Semper went further to use tectonic to define the qualities of making inherent

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20

Guo, Mu. "Amplitude balancing in [tau]-p domain." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40667.

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</p><p>An approach to balance the amplitude of seismic data in the Ï -Ï domain is introduced in this study. The idea of amplitude balancing technique is based on the following observation: In the Ï -Ï domain, direct wave, ground-roll, primary reflection, multiple and refraction arrivals are located at different regions. These regions can be viewed as signal region and noise region. By increasing the amplitudes in the signal region and suppressing the amplitudes in the noise region, so called amplitude balancing in T-Ï domain, the signal-to-noise ratio of seismic data can be improved. The Ï

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21

Sherman, Greg. "A method for the spatial dynamic simulation of reciprocating compressors using the digital computer." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80075.

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This thesis introduces the application of computer-aided engineering techniques to the dynamic analysis of reciprocating compressor designs. The analysis process is detailed in three steps. The first step, an interactive pre-processor, develops the shaking forces and torques acting on the machine. The second step is a batch processed program that performs a dynamic simulation of the compressor in operation. The compressor and mounting are simulated as a rigid body with six degrees-of-freedom (X, Y, and Z translations and roll, pitch, and yaw) mounted to the ground with up to 25 arbitrarily o

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22

Simerly, Roy L. "Strategy and performance in a volatile environment: a study of the electronic computing industry." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/37225.

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23

Shao, John Jianping. "An empirical study of equity repurchase decisions and market reaction." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39962.

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24

Chen, Ru. "Isolation, structure elucidation and approaches to the partial synthesis of new taxol analogs." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-11102009-020316/.

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25

Hoffman, Rhonda M. "Pre-weaning diet and stall weaning method influences on stress response in foals." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40651.

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<p>The response of foals to the stress of weaning was examined in terms of a behavioral protocol and the responses of plasma ascorbate, serun1 cortisol, and the serum cortisol response to an ACTH challenge. Behavior scores (1 to 10) as an index of stress were assigned to each foal daily, with high scores indicating less stress and better adjustment. The experimental plan was a 2 X 2 factorial of pre-weaning diet and stall weaning method. Foals were raised on pasture supplemented with hay and a pelleted concentrate (PHC) or pasture supplemented with hay only (PH). Foals were placed in st

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26

Hurst, Gregory H. "Evaluation of the use of ferrous iron for chlorite removal under alkaline pH conditions." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42148.

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Chlorine dioxide has gained much attention for use as a possible alternative disinfectant in water treatment plants due to concerns regarding trihalomethane formation in drinking waters which utilize chlorine as the primary disinfectant and the strict regulations regarding THM's and THMFP (MCL of 0.080 mg/L for TTHMs) (Pontius, 1993). Although the use of Cl02 as a disinfectant prevents the formation of THM's, concern exists regarding the potential health risks due to the disinfection-by-products of chlorite and chlorate. T<p>he main objective of this project was to study the removal of chlorit

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27

Yoder, Jonna D. "Modified atmosphere packaging of hard grated cheeses." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/43806.

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The objective of this study was to use MAP technology to produce safe, shelf-stable, high quality, hard grated cheeses not requiring preservatives or refrigeration during distribution and sale. Initially, a challenge study with Staphylococcus aureus (S. aureus) was conducted to determine the water activity (Aw) level of high-moisture cheeses necessary to prevent the growth of a food pathogen when packaged under a modified atmosphere (25% CO, and 75% N,). Other microbial analysis included mold and yeast enumerations. Secondly, product quality and shelf stability were determined biweekly by se

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28

Molique, Robert S. "Frictional behavior of polymers : the transition from static to kinetic conditions /." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063256/.

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29

Nunez, Steven C. "Behavioral, temporal, and spatial relationships in free-ranging female Anolis carolinensis (Sauria: Polychridae)." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063313/.

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30

Morgan, Steven Craig. "Effects of context on the leniency, accuracy, and utility of self-appraisals of performance : social comparison information and purpose of appraisal /." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06102009-063250/.

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31

Lee, Fang Chi. "An exploratory study of international tourism demand from the selected countries to Taiwan." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06232009-063249/.

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32

Sultan, Michael S. "An analysis of the term structure of interest rates, January 1980-March, 1994." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42235.

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The purpose of this study is to describe and analyze the behavior of the term structure of interest rates on a daily basis between January 2, 1980, and March 31, 1994, especially with respect to the synchronization and the relative amplitude of change of different maturities in the term structure. Results reveal a high degree of synchronization of the elements of the yield curve during this period. Volatility was found to vary inversely with maturity during this time. The characteristics seen in the daily term structure of this period are consistent with observations in prior studies, incl

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33

LePera, Stephen Damian. "An experimental study of controlled gas phase synthesis of nanosize TO2 powders." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/43439.

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<p>Recently there has been an increased interest in the generation of ceranlic powders composed ofnanosize particles with a narrow size-distribution and high purity. It has been shown that ceramics sintered from these ultrafine partic1es exhibit improved mechanical and electrical properties. The present research has attempted to control the growth of the ceramic particles in a relatively simple continuous flow process by placing charges on the forming particles and controlling their evolution with an electric field.</p> <p> Nanosize Ti0<sub>2</sub> powder was produced using a multi-stream, co-

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34

Guo, Ting. "Separation of the common-mode and the differential-mode conducted electromagnetic interference noise." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40663.

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One of the difficulties in solving E:MI problems is the lack of diagnostic tools available. In this thesis work, a tool, called Noise Separator, is developed, which can be used to decipher the differential-mode (DM) noise and the common-mode (CM) noise from the total noise. A noise separator hardware is built and tested. The results show that at least 50 dB rejection to either DM or CM noise is achieved for frequency ranging from 10 KHz to 30 MHz. With the aid of the Noise Separator, EMI filter design is made easier.<br>Master of Science

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35

Khan, Ashraf Reza. "Preparation and characterization of lead lanthanum titanate thin films by metalorganic decomposition." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42122.

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<p>There is a critical need for materials with very high dielectric constant to be integrated in the next generation of 64- and 256-Mb ULSI DRAMs. Materials in the Pb-based perovskite family have high relative permittivities and have consequently attracted a world wide attention. Cubic Lead Lanthanum Titanate (PLT) is one of the prime candidates in this respect and its structure and properties in the thin film form were investigated in the present study, for potential application in the ULSI DRAMs.</p> <p>Thin films of Lead Lanthanum Titanate corresponding to 28 atomic percentage of lanthanum

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36

Holliday, Glenn E. "Supporting design: a computational theory of design and its implementation in a software support tool." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40670.

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Most work in knowledge acquisition and manipulation has focused on expert systems. Expert systems solve one kind of problem: heuristic classification. This thesis extends some advances in knowledge engineering to a broader class of problem: design. <p>Design is examined as a generic activity, found in many fields of professional practice. A theoretical framework is developed that supports the refinement of design from high-level concepts through implementation. This framework includes a computational model that is shown to be completely general (Turing-equivalent). Therefore, the theory and mo

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37

Kafka, Byran C. "Measurements of in-cylinder heat transfer with inflow-produced turbulence." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/41948.

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Heat transfer in cylinder spaces is important to the performance of many reciprocating energy conversion machines, such as gas compressors and Stirling machines. Work over the past 10 years has shown that heat transfer driven by oscillating pressure differs from steady state heat transfer in magnitude and in phase; in-cylinder heat transfer under this oscillating condition can be out of phase with the temperature difference. For studies with closed piston-cylinder gas springs, this heat transfer phase shift has been successfully predicted with the use of a complex Nusselt number; since a compl

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38

Haney, Orrick Rowland. "Design, performance, and analysis of a multi-level air permeability test." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40664.

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The design, performance, and analysis of a soil vapor extraction system to identify zones most conductive to air transport and quantify kair in sequential soil layers is presented. A multi-level extraction well, with alternating solid and screened sections, was utilized to characterize multi-layered media. The field site, located in the Carolina Slate Belt within the physiographic region known as the Piedmont, is comprised of alternating layers of different soil types of varying kair , including thin bands of clay, silt, and sand. <p>The pneumatic test consisted of one multi-level e

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39

Koyama, Junji. "Effects of earthquakes on partially-filled water tanks." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/43432.

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<p>This thesis is concerned with the effects of earthquakes on partially-filled water tanks. The analysis is applicable to rectangular water tanks, which have received little attention to date. The analysis is relatively involved and includes the derivation of the equations of motion for the vibration of the whole of tank by means of substructure synthesis, a stochastic analysis relating the random ground motion caused by earthquakes to the random vibration of the tank, a stochastic characterization of the fluid pressure and computation of the probability of failure of the tank. <p><br>Master

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40

Black, Kurt D. "An investigation of strategic planning implementation and deployment efforts." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42628.

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Many American organizations have reported dissatisfaction with the results of their strategic planning, TQM, or other large-scale change efforts. Some have even abandoned their efforts all together. According to the literature, the major problem seems to be with implementation and deployment. One of the major obstacles that organizations face in the implementation and deployment phase of their planning effort is the loss of momentum. They seem to get the ball rolling and generate a lot of initial excitement but then after some period of time, the energy level begins to decline. All of t

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41

Taylor, Jesse H. "An application of signature of smooth manifolds." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07292009-090530/.

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42

Renfrow, Joseph A. "A comparison of the use of classical and modern control design techniques for improving the lateral-directional powered approach flying qualities of the F-14 aircraft." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07292009-090506/.

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43

Nair, Rajesh. "On improving parallel pattern single fault propagation for synchronous sequential circuits." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06302009-040508/.

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44

Peters, Diane S. "Impact damage evaluation of high performance polymeric composite material systems." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-08222009-040525/.

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45

Yang, Won-Kyung. "The nursing home search and selection process : gender and relationship issues /." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063521/.

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46

Savens, Barbara. "A greenways approach to resource management : the process of environmental corridor design /." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01242009-063114/.

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47

Shoaf, M. Todd. "Urban in the sky : a vertical transition /." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12052009-020340/.

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48

Wolfe, Kristy L. "Evaluation of plasma sprayed coatings as surface pretreatments for adhesive bonding." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063427/.

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49

Perdue, James Patrick. "Modeling and simulation of surface mount packages." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07112009-040410/.

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50

Moon, Walter Todd. "A place for anything and nothing." Thesis, Virginia Polytechnic Institute and State University, 1994. http://hdl.handle.net/10919/64024.

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The architectural design process is a cycle of analysis and synthesis which ultimately yields a built structure that responds not only to functional needs but also provides revelations about the world in which we live. Architecture presents a dialogue at different levels and scales, allowing for many interpretations as well as revealing basic truths.<br>Master of Architecture

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