Browsing ETDs: Virginia Tech Electronic Theses and Dissertations by Title
Now showing items 21-40 of 38056
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2GHz W-CDMA Radio Transceiver
(Virginia Tech, 1998-12-15)A radio transceiver has been designed and built for a W-CDMA experimental system operating at 2GHz. The radio is an RF front-end for mobile terminals. The radio provides the functions of modulation and demodulation to ... -
3-D Bio-inspired Microenvironments for In Vitro Cell Migration
(Virginia Tech, 2015-10-21)Cancer metastasis is the leading cause of death related to cancer diseases. Once the cancer cells depart the primary tumor site and enter the blood circulation, they spread through the body and will likely initiate a new ... -
3-D finite element beam/connector model for a glulam dome cap
(Virginia Tech, 1992)The purpose of this study is to model the beam/decking connectors (nails) of a glulam dome cap by beam/connector elements, and to analyze various dome cap models in order to investigate the potential of the beam/connector ... -
3-D flow and performance of a rocket pump inducer at design and off-design flow rates
(Virginia Tech, 1994-08-05)The ADP rocket pump inducer was studied computationally using a 3-D Navier-Stokes solver, The Moore Elliptic Flow Program. Design and off-design flow rates were simulated to qualitatively and quantitatively study the effects ... -
3-D flow and performance of a tandem-bladed rocket pump inducer
(Virginia Tech, 1992-04-05)This thesis presents the results of a three-dimensional flow calculation with a model of turbulent viscosity for a tandem-bladed inducer in air. The purpose is to understand the 3D flow development through the two blade ... -
3-D flow calculations of a bifurcated 2D supersonic engine inlet at takeoff
(Virginia Tech, 1995-08-05)An internal, 3-D, viscous numerical flow simulation was performed on the rectangular-to-circular transition, bifurcated, 2D high speed civil transport engine inlet at takeoff. The objective of the study was to obtain the ... -
A 3-d model for the operation of a radiation pyrometer in an axial flow turbine
(Virginia Polytechnic Institute and State University, 1987)An accurate knowledge of turbine blade surface temperature is desired in order to obtain maximum performance from turbine engines. A limited spectrum radiation pyrometer can be used for blade temperature measurement. A ... -
3-D Point Cloud Generation from Rigid and Flexible Stereo Vision Systems
(Virginia Tech, 2009-12-04)When considering the operation of an Unmanned Aerial Vehicle (UAV) or an Unmanned Ground Vehicle (UGV), such problems as landing site estimation or robot path planning become a concern. Deciding if an area of terrain has ... -
3-D Printing, Characterizing and Evaluating the Mechanical Properties of 316L Stainless Steel Materials with Gradient Microstructure
(Virginia Tech, 2021-03-24)Making gradient in the microstructure of metals is proven to be a superior method for improving their mechanical properties. In this research, we 3D print, characterize and evaluate the mechanical properties of 316L Stainless ... -
3-D temperature distributions in spot heating of a ceramic by a focused microwave source
(Virginia Tech, 1996)Recent work has described microwave applicators which produce localized spot heating of a workpiece with a Gaussian spatial distribution of microwave power. Applicators of this type provide a nearly ideal heating pattern ... -
A 3-Dimensional Computer Simulation Model for Temperature Distribution Prediction in a Seafood Shipping Container
(Virginia Tech, 1996)Seafood transportation/distribution has become an important activity in the seafood industry due to increasing global demand for fresh seafood. Providing good quality seafood to consumers requires appropriate handling and ... -
3.5 GHz Indoor Propagation Modeling and Channel Characterization
(Virginia Tech, 2015-06-29)In the push for spectrum sharing and open spectrum access, the 3.5 GHz frequency band is under consideration for small cells and general Wireless Local Area Networks (WLAN) in the United States. The same band is beginning ... -
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3D Coiling at the Protrusion Tip: New Perspectives on How Cancer Cells Sense Their Fibrous Surroundings
(Virginia Tech, 2021-05-24)Cancer metastasis, the spread of cancer from the primary site to distant regions in the body, is the major cause of cancer mortality, accounting for almost 90% of cancer related deaths. During metastasis, cancer cells from ... -
3D Commutation-Loop Design Methodology for a SiC Based Matrix Converter run in Step-up mode with PCB Aluminum Nitride Cooling Inlay
(Virginia Tech, 2021-07-22)This work investigates three-dimensional power loop layout for application to a SiC based matrix converter, providing a symmetric, low-inductance solution. The thesis presents various layout types to achieve this design ... -
3D Deep Learning for Object-Centric Geometric Perception
(Virginia Tech, 2022-06-30)Object-centric geometric perception aims at extracting the geometric attributes of 3D objects. These attributes include shape, pose, and motion of the target objects, which enable fine-grained object-level understanding ... -
3D Dynamic Stall Simulation of Flow over NACA0012 Airfoil at 10⁵ and 10⁶ Reynolds Numbers
(Virginia Tech, 2014-04-03)The work presented in this thesis attempts to provide an understanding of the physics behind the dynamic stall process by simulating the flow past pitching NACA-0012 airfoil at 100,000 and 1 million Reynolds number based ... -
3D Massive MIMO and Artificial Intelligence for Next Generation Wireless Networks
(Virginia Tech, 2020-04-13)3-dimensional (3D) massive multiple-input-multiple-output (MIMO)/full dimensional (FD) MIMO and application of artificial intelligence are two main driving forces for next generation wireless systems. This dissertation ... -
3D Micromachined Passive Components and Active Circuit Integration for Millimeter-wave Radar Applications
(Virginia Tech, 2012-02-20)The development of millimeter-wave (30-300 GHz) sensors and communications systems has a long history of interest, spanning back almost six decades. In particular, mm-wave radars have applications as automotive radars, in ... -
3D Numerical Simulation to Determine Liner Wall Heat Transfer and Flow through a Radial Swirler of an Annular Turbine Combustor
(Virginia Tech, 2013-08-26)RANS models in CFD are used to predict the liner wall heat transfer characteristics of a gas turbine annular combustor with radial swirlers, over a Reynolds number range from 50,000 to 840,000. A three dimensional hybrid ...
