Browsing College of Engineering (COE) by Title
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Hodiex: A Sixth Order Accurate Method for Solving Elliptical PDEs
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1993), TR9301This paper describes a method for discretizing general linear two dimensional elliptical PDEs with variable coefficients, Lu=g, which achieves high orders of accuracy on an extended range of problems. The method can be ... 
Hokie Flyer, Vol 1, No. 1
(Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, 1994)Newsletter on events, research, and the state of the Department of Aerospace and Ocean Engineering in 1994. 
Holographic video at 40 frames per second for 4million object points
(Optical Society of America, 20110801)We propose a fast method for generating digital Fresnel holograms based on an interpolated wavefrontrecording plane (IWRP) approach. Our method can be divided into two stages. First, a small, virtual IWRP is derived in a ... 
HOMER: An Interactive System for Home Based Stroke Rehabilitation
(ACM, 2017)Delivering long term, unsupervised stroke rehabilitation in the home is a complex challenge that requires robust, low cost, scalable, and engaging solutions. We present HOMER, an interactive system that uses novel therapy ... 
A Homotopy Algorithm for the Combined Hsquared/Hto Infinity Model Reduction Problem
(Department of Computer Science, Virginia Polytechnic Institute & State University, 19930501), TR9315The problem of finding a reduced order model, optimal in the Hsquared sense, to a given system model is a fundamental one in control system analysis and design. The addition of a Hto infinity constraint to the Hsquared ... 
A Homotopy Algorithm for the Combined H2/H&infin Model Reduction Problem
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1992), TR9241The problem of finding a reduced order model, optimal in the H2 sense, to a given system model is a fundamental one in control system analysis and design. The addition of an H∞ constraint to the H2 optimal model ... 
A Homotopy Approach for Solving Constrained Optimization Problems
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1988), TR8850A homotopy approach for solving constrained parameter optimization problems is examined. The first order necessary conditions, with the complementavity conditions represented using a technique due to Mangasarian, are ... 
Homotopy Approaches to the H2 Reduced Order Model Problem
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1991), TR9124The optimal projection approach to solving the H2 reduced order model problem produces two coupled, highly nonlinear matrix equations with rank conditions as constraints. The algorithms proposed herein utilize probabilityone ... 
A Homotopy Method Applied to Elastica Problems
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1980), CS80001RThe inverse problem in nonlinear (incompressible) elastica theory, where the end positions and inclinations rather than the forces and moment are specified, is considered. Based on the globally convergent ChowYorke ... 
Homotopy methods for constraint relaxation in unilevel reliability based design optimization
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2007), TR0728Reliability based design optimization is a methodology for finding optimized designs that are characterized with a low probability of failure. The main ob jective in reliability based design optimization is to minimize ... 
Homotopy Methods for Solving the Optimal Projection Equations for the H2 Reduced Order Model Problem
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1991), TR9113The optimal projection approach to solving the H2 reduced order model problem produces two coupled, highly nonlinear matrix equations with rank conditions as constraints. Due to the resemblance of these equations to standard ... 
HOMPACK90: A Suite of FORTRAN 90 Codes for Globally Convergent Homotopy Algorithms
(Department of Computer Science, Virginia Polytechnic Institute & State University, 19960701), TR9611HOMPACK90 is a FORTRAN 90 version of the FORTRAN 77 package HOMPACK (Algorithm 652), a collection of codes for finding zeros or fixed points of nonlinear systems using globally convergent probabilityone homotopy algorithms. ... 
HOMPACK: A Suite of Codes for Globally Convergent Homotopy Algorithms
(Department of Computer Science, Virginia Polytechnic Institute & State University, 1990), TR9036There are algorithms for finding zeros or fixed points of nonlinear systems of equations that are globally convergent for almost all starting points, i.e., with probability one. The essence of all such algorithms is the ... 
Horizontalparallaxonly electronic holography
(Optical Society of America, 20050401)The principle of optical scanning holography (OSH) is proposed to acquire horizontalparallaxonly (HPO) holographic information electronically. We first briefly summarize the results of OSH and then discuss how HPOelectronic ... 
How Exposure to ”Role Model” Projects Can Lead to Decisions for More Sustainable Infrastructure
(MDPI, 20160130)A role model, whether an individual or a project, can inspire similar performance in others. This research examines such a phenomenon during the design process for more sustainable physical infrastructure. In this empirical ... 
How soap bubbles freeze
(Springer Nature, 20190618)Droplets or puddles tend to freeze from the propagation of a single freeze front. In contrast, videographers have shown that as soap bubbles freeze, a plethora of growing ice crystals can swirl around in a beautiful effect ... 
How Spectrum Policy Enables Wireless Innovation: WiFi and Bluetooth Origins
(20131217)A seminar talk by Dr. Michael Marcus, a consultant and adjunct professor of ECE at VT. Abstract appears below. 
How to Define the Next Generation Cardiac CT Architecture?  a Contemporary Challenge for Interdisciplinary Collaboration
(20100521)Cardiovascular diseases are pervasive with high mortality and morbidity at tremendous social and healthcare costs. There are urgent needs for significantly higher fidelity cardiac CT with substantially lower radiation dose, ... 
How wind drives the correlation between leaf shape and mechanical properties
(Springer Nature, 20181105)From a geometrical point of view, a nonsessile leaf is composed of two parts: a large flat plate called the lamina, and a long beam called the petiole which connects the lamina to the branch/stem. While wind is exerting ... 
HSCT Configuration Design Space Exploration Using Aerodynamic Response Surface Approximations
(Department of Computer Science, Virginia Polytechnic Institute & State University, 19990301), TR9901A method has been developed to generate and use polynomial approximations to the range and cruise drag components in a highly constrained, multidisciplinary design optimization of a High Speed Civil Transport configuration. ...