VTechWorks is expected to experience some downtime tomorrow, Friday, 5/27, sometime between 8am and 10am, as ITS migrates it to new virtual machines. Please plan accordingly  sorry for the inconvenience. As always, write vtechworks@vt.edu with questions or concerns.
Browsing College of Engineering (COE) by Title
Now showing items 827 of 2375

A closedform method for calculating the angular distribution of multiply scattered photons through isotropic turbid slabs
(Optical Society of America, 201111)This paper develops a method for calculating the angular distribution (AD) of multiply scattered photons through isotropic turbid slabs. Extension to anisotropic scattering is also discussed. Previous studies have recognized ... 
A comparison of SuperDARN ACF fitting methods
(American Geophysical Union, 201305)The Super Dual Auroral Radar Network (SuperDARN) is a worldwide chain of HF radars which monitor plasma dynamics in the ionosphere. Autocorrelation functions are routinely calculated from the radar returns and applied to ... 
A computational study of nucleosomal DNA flexibility
(CELL PRESS, 200612)Molecular dynamics simulations of the nucleosome core particle and its isolated DNA free in solution are reported. The simulations are based on the implicit solvent methodology and provide insights into the nature of ... 
A conceptual model of the sense of presence in virtual environments
(MIT Press, 199904)This paper proposes a model of interaction in virtual environments which we term the immersion, presence, performance (IPP) model. This model is based on previous models of immersion and presence proposed by Barfield and ... 
A correlation force spectrometer for single molecule measurements under tensile load
(American Institute of Physics, 20130107)The dynamicalmechanical properties of a small region of fluid can be measured using two closely spaced thermally stimulated micrometerscale cantilevers. We call this technique correlation force spectroscopy (CFS). We ... 
A diffusionviscous analysis and experimental verification of defect formation in sintered silver bondline
(Cambridge University Press, 201404)The lowtemperature joining technique (LTJT) by silver sintering is being implemented by major manufacturers of power electronic devices and modules for bonding power semiconductor chips. A common dieattach material used ... 
A kinetic formulation of 3dimensional quantum mechanical harmonicoscillator under a random perturbation
(AIP Publishing, 197802)The behavior of a three_dimensional, nonrelativistic, quantum mechanical harmonic oscillator is investigated under the influence of three distinct types of randomly fluctuating potential fields. Specifically, kinetic (or ... 
A longitudinallongitudinal mode TERFENOLD/Pb(Mg1/3Nb2/3)O3PbTiO3 laminate composite
(AIP Publishing, 200411)We have found that laminates of longitudinally magnetized magnetostrictive TERFENOLD layersand a longitudinally poled piezoelectric Pb(Mg1/3Nb2/3)O3PbTiO3 crystal have a giant magnetoelectric voltage coefficient of >430 ... 
A Markov process model of ocean sediments
(Acoustical Society of America, 198501)Monochromatic planewave illumination of a randomly stratified, laterally homogeneous sediment layer is considered. The deposition process creating the stochastic layering is assumed to be a continuous parameter, finite ... 
A new characterization method for delay and power dissipation of standard library cells
(Hindawi Publishing Corporation, 200211)A simplified method for characterization of standard library cells based on the linear delay model is presented in this paper. The linear model is chosen as it allows rapid characterization with a modest number of simulations, ... 
A note on the energy of relative equilibria of point vortices
(American Institute of Physics, 200710)Analytical formulas are derived for the energy of simple relative equilibria of identical point vortices such as the regular polygons, both open and centered, and the various known configurations consisting of nested regular ... 
a novelapproach to the synthesis of nondispersive wave packet solutions to the KleinGordon and Dirac equations
(AIP Publishing, 199008)A systematic approach to the derivation of exact nondispersive packet solutions to equationsmodeling relativistic massive particles is introduced. It is based on a novel bidirectional representation used to synthesize ... 
A piezoelectric bistable plate for nonlinear broadband energy harvesting
(AIP Publishing, 201009)Recently, the idea of using nonlinearity to enhance the performance of vibrationbased energy harvesters has been investigated. Nonlinear energy harvesting devices have been shown to be capable of operating over wider ... 
A piezoelectric single crystal traveling wave step motor for lowtemperature application
(AIP Publishing, 200804)A piezoelectric Pb(Mg(1/3)Nb(2/3))O(3)PbTiO(3) single crystal traveling wave rotary motor operated in a stepping motion for cryogenic actuations was developed and characterized. This single crystal stepping motor had a ... 
A piezomagnetoelastic structure for broadband vibration energy harvesting
(AIP Publishing, 200906)This letter introduces a piezomagnetoelastic device for substantial enhancement of piezoelectric power generation in vibration energy harvesting. Electromechanical equations describing the nonlinear system are given along ... 
A pressure gauge based on gas density measurement from analysis of the thermal noise of an atomic force microscope cantilever
(AIP Publishing, 201205)We describe a gasdensity gauge based on the analysis of the thermallydriven fluctuations of an atomic force microscope (AFM) cantilever. The fluctuations are modeled as a ringdown of a simple harmonic oscillator, which ... 
A purge and trap integrated microGC platform for chemical identification in aqueous samples
(The Royal Society of Chemistry, 20140519)The majority of current microscale gas chromatography (_GC) systems focus on air sampling to detect volatile organic compounds (VOCs). However, purging the VOCs from a water sample using microsystems is an unchartered ... 
A realistic radar data simulator for the Super Dual Auroral Radar Network
(American Geophysical Union, 201305)The Super Dual Auroral Radar Network (SuperDARN) is a chain of HF radars for monitoring plasma flows in the high and middle latitude E and F regions of the ionosphere. The targets of SuperDARN radars are plasma irregularities ... 
A saturation excess erosion model
(American Society of Agricultural and Biological Engineers, 2013)Scalingup sediment transport has been problematic because most sediment loss models (e.g., the Universal Soil Loss Equation) are developed using data from small plots where runoff is generated by infiltration excess. ... 
a simple model for the average local entrainment rate
(AIP Publishing, 198607)A new expression for the mean local entrainment rate in a turbulent intermittent flow is obtained. This expression is used to obtain a simple model for the entrainment rate assuming that an indicator function can be defined ...