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Fabrication of Three-Dimensionally Independent Microchannels Using a Single Mask Aimed at On-Chip Microprocessor Cooling
(Virginia Tech, 2007-11-28)
A novel fabrication process is presented which allows for three-dimensionally independent features to be etched in silicon using SF6 gas in a deep reactive ion etcher (DRIE) after a single etch step. The mechanism allowing ...
Cold-start effects on performance and efficiency for vehicle fuel cell systems
(Virginia Tech, 2002-12-12)
In recent years government, academia and industry have been pursuing fuel cell technology as an alternative to current power generating technologies. The automotive industry has targeted fuel cell technology as a potential ...
The Design, Fabrication, and Modeling of a Piezoelectric Linear Motor
(Virginia Tech, 2001-12-19)
The focus of this research was to create a linear motor that could easily be packaged and still perform the same task of the current DC motor linear device. An incremental linear motor design was decided upon, for its ...
Lateral and Posterior Dynamic Bending of the Mid-Shaft Femur: Fracture Risk Curves for the Adult Population
(Virginia Tech, 2004-04-22)
The purpose of this study was to develop injury risk functions for dynamic bending of the human femur in the lateral-to-medial and posterior-to-anterior loading directions. A total of 45 experiments were performed on human ...
The Music Muse
(Virginia Tech, 1996-11-01)
Ever wonder why two people can sing the same note with the same loudness, but sound completely different? Middle C is middle C no matter who sings it, yet for some reason Lucianno Pavarotti1s middle C sounds richer and ...
Transient Model of Heat,Mass,and Charge transfer as well as Electrochemistry in the Cathode Catalyst Layer of a PEMFC
(Virginia Tech, 2001-12-17)
A transient model of the cathode catalyst layer of a proton exchange membrane fuel cell is presented. The catalyst layer structure can be described as a superposition of the polymer membrane, the backing layer, and some ...
Development and Analysis of the Lumped Parameter Model of a Piezo-Hydraulic Actuator
(Virginia Tech, 2000-11-16)
Hybrid actuation is an expanding field in which several systems, such as a mechanical, electrical, hydraulic, pneumatic, and/or thermal, among others, are integrated in order to combine certain aspects of each system, and ...
Approximations for Nonlinear Differential Algebraic Equations to Increase Real-time Simulation Efficiency
(Virginia Tech, 2010-05-05)
Full-motion driving simulators require efficient real-time high fidelity vehicle models in order to provide a more realistic vehicle response. Typically, multi-body models are used to represent the vehicle dynamics, but ...
Thermal Analysis of a Vaporization Source for Inorganic Coatings
(Virginia Tech, 2000-12-08)
A thermal analysis of a conventional vaporization source by finite difference methods, including experimental validation, is presented. Such a system is common to industries whose chief concern is the precipitation of ...
Thermophysical Properties and Microstructural Changes of Composite Materials at Elevated Temperature
(Virginia Tech, 2009-11-19)
Experimental methods were developed and used to quantify the behavior of composite materials during heating to support development of heat and mass transfer pyrolysis models. Methods were developed to measure specific heat ...