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1 Furse, Cynthia M.Women in engineering: statistical analysis of ACT data and proposed procedure to reverse trendWomen have historically been underrepresented both in college majors and professional careers in STEM fields. This disparity can be observed in many countries, though it is most evident in the US. In this paper we analyze historical ACT data over a 30-year span and correlate gender differences ...2011
2 Furse, Cynthia M.Novel inverse methods for wire fault detection and diagnosisAbstract?In recent years, methods used to locate and diagnose wiring faults have increased in complexity and variety. However, there is much research yet to take place in order to develop high resolution models for accurately analysis of the effects of small faults, gradual impedance discontinuities...2011
3 Scarpulla, MichaelExact field solution to guided wave progagation in lossy thin filmsWave guidance is an important aspect of light trapping in thin film photovoltaics making it important to properly model the effects of loss on the field profiles. This paper derives the full-field solution for electromagnetic wave propagation in a symmetric dielectric slab with finite absorption. ...2011
4 Henderson, Thomas C.; Sikorski, ChristopherSymmetry: a basis for sensorimotor reconstructionGiven a set of unknown sensors and actuators, sensorimotor reconstruction is achieved by exploiting relations between the sensor data and the actuator control data to determine sets of similar sensors, sets of similar actuators, necessary relations between them, as well as sensorimotor relations ...sensorimotor reconstruction; sensor data; actuator control data2011
5 Myers, Chris J.Learning genetic regulatory network connectivity from time series dataAbstract-Recent experimental advances facilitate the collection of time series data that indicate which genes in a cell are expressed. This information can be used to understand the genetic regulatory network that generates the data. Typically, Bayesian analysis approaches are applied which neglect ...2011
6 Scarpulla, MichaelGrain size and texture of Cu2ZnSnS4 thin films synthesized by co-sputtering binary sulfides and annealing: effects of processing conditions and sodiumWe investigate the synthesis of kesterite Cu2ZnSnS4 (CZTS) polycrystalline thin films using cosputtering from binary sulfide targets followed by annealing in sulfur vapor at 500 ?C to 650 ?C. The films are the kesterite CZTS phase as indicated by x-ray diffraction, Raman scattering, and optical abso...2011
7 Stringfellow, Gerald B.Nonequilibrium composition profiles of alloy quantum dots and their correlation with the growth modeEquilibrium composition profiles (CPs) of epitaxial alloy quantum dots (QDs) are well established theoretically. However nonequilibrium CPs may occur experimentally. Using an atomistic-strain-model Monte Carlo simulation method, we demonstrate a striking correlation between the nonequilibrium CPs of...2011
8 Furse, Cynthia M.A stochastic FDTD method for statistically varying biological tissuesTHE analysis of radio wave absorption is a continuing concern for the cell phone industry due to health effects (and associated regulations) of the person using the cell phone [1,2]. The amount of allowable power absorbed has a strong impact on the design of the phone (antenna, electromagnetic inte...2011
9 Kopta, Daniel M.; Kensler, Andrew Erin; Spjut, Josef Bo; Brunvand, Erik L.; Davis, AlFast, effective BVH updates for dynamic ray-traced scenes using tree rotationsBounding volume hierarchies are a popular choice for ray tracing animated scenes due to the relative simplicity of refitting bounding volumes around moving geometry. However, the quality of such a refitted tree can degrade rapidly if objects in the scene deform or rearrange significantly as the ...Ray tracing; Acceleration structures; Bounding volume hierarchies; Tree rotations; Dynamic scenes; Parallel update2011
10 Bordelon, Amanda C.Flowable fibrous concrete for thin pavement inlaysSynthetic fibers within a flowable fibrous concrete (FFC) mixture were characterized by relating their spatial distribution and orientations, determined from x-ray computed tomography (CT), with the measured toughness or fracture energy response of a FFC specimen. This new type of concrete, FFC, wa...2011
11 Furse, Cynthia M.Leaky fields from damaged shieldsIn a world where wireless devices appear to dominate society, it is wires that truly rule and connect our lives. Certainly the spread of cellular phones, Bluetooth technology, wireless sensor networks, and advances of ion-lithium battery capabilities have made common daily devices more disconnecte...2011
12 Furse, Cynthia M.Antenna optimization for vehicular environmentsAbstract? This paper presents a multi-antenna optimization for communication in a Rockwell T-39 Sabreliner, a mid-size aircraft with a metallic body. The aircraft channel at 2.45 GHz is modeled using site specific 3D ray-tracing software. Added effects from system details including the antenna radi...2011
13 Furse, Cynthia M.A study on the efficiency of transparent patch antennas designed from conductive oxide filmsAbstract? A study on the efficiency of transparent patch antennas designed from indium tin oxide (ITO) films is presented to provide design guidelines for patch type transparent antennas. The trade-offs between optical transparency and antenna efficiency is analyzed by considering typical materia...2011
14 Scarpulla, MichaelSnS thin-films by RF sputtering at room temperatureTin monosulfide (SnS) is of interest as a potential solar cell absorber material. We present a preliminary investigation of the effects of sputtering conditions on SnS thin-film structural, optical, and electronic properties. Films were RF sputtered from an SnS target using an argon plasma. Resi...2011
15 Furse, Cynthia M.A comparative study on two types of transparent patch antennasProperties of optically transparent patch antennas designed from meshed conductor and transparent conductive films are studied and compared. It is shown that at S band, meshed antenna provides the best antenna efficiency for the highest transparency. It is practical to design a 90% transparent mesh...2011
16 Stringfellow, Gerald B.Phase separation in strained epitaxial InGaN islandsPhase separation (PS) produces InN composition gradients in InGaN islands, which may be important for light emitting diodes, solar cells, and lasers. Thus, the control of PS is critical, and the kinetic growth process, which is suggested to be important for controlling PS in Stranski-Krastanov islan...2011
17 Scarpulla, MichaelEnhanced light absorption in thin-film silicon solar cells by scattering from Embedded Dielectric NanoparticlesWe investigate the light-trapping effects of dielectric nanoparticles embedded within the active semiconductor layer of a thin-film solar cell. The baseline model consists of a 1.0 μm slab of crystalline silicon on an aluminum back contact topped with a 75 nm Si3N4 anti-reflective coating. Using fi...2011-01-01
18 Simpson, Jamesina J.FDTD calculations of the diffraction coefficient of vibrating wedgesThe full-vector Maxwell's equations finite-difference time-domain (FDTD) method is employed to calculate diffraction coefficients of vibrating conducting and dielectric wedges. Two-dimensional FDTD models of right-angle wedges are constructed to include total-field scattered-field incident plane-wav...2011-01-01
19 Scarpulla, MichaelPulsed laser processing of electrodeposited CuInSe2 photovoltaic absorber thin filmsIn this report we investigate the effects of pulsed laser annealing (PLA) on both as-electrodeposited (ED) and electrodeposited-furnace annealed (EDA) CuInSe2 (CIS) samples by varying the laser fluence (J/cm2) and number of pulses. Results for as-ED samples indicate that liquid CIS-phase formation d...2011-01-01
20 Furse, Cynthia M.Measurement and modeling of multiuser multiantenna system in aircraft in the presence of electromagnetic noise and interferenceThis paper evaluates the accuracy with which the performance of a multi-user multi-antenna system can be predicted with and without considering co-channel interference and noise (Gaussian, α- stable and Cauchy) using a site-specific 3D ray-tracing algorithm as well as with statistical models with G...2011-01-01
21 Scarpulla, MichaelElectron backscatter diffraction and photoluminescence of sputtered CdTe thin filmsElectron backscatter diffraction (EBSD) has been used to characterize the grain size, grain boundary structure, and texture of sputtered CdTe at varying deposition pressures before and after CdCl2 treatment in order to correlate performance with film microstructure. It is known that twin boundaries ...2011-01-01
22 Regehr, JohnFinding and understanding bugs in C compilersCompilers should be correct. To improve the quality of C compilers, we created Csmith, a randomized test-case generation tool, and spent three years using it to find compiler bugs. During this period we reported more than 325 previously unknown bugs to compiler developers. Every compiler we tested w...2011-01-01
23 Simpson, Jamesina J.A magnetic field-independent absorbing boundary condition for magnetized cold plasmaAn effective absorbing boundary condition (ABC) based on the second-order approximations of Engquist and Majda's wave equations is presented for terminating three-dimensional finite-difference time-domain (FDTD) models employing the E-J collocated magnetized cold plasma algorithm. Numerical tests de...2011-01-01
24 Regehr, JohnA practical logic framework for verifying safety properties of executablesWe present a novel program logic, Lf , which is designed on top of a Hoare logic, but is simpler, more flexible and more scalable. Based on Lf , we develop a framework for automatically verifying safety properties of executables. It utilizes a whole-program interprocedural abstract interpretation to...2011-01-01
25 Simpson, Jamesina J.Detection of embedded ultra-subwavelength-thin dielectric features using elongated photonic nanojetsPhotonic nanojets have been previously shown (both theoretically and experimentally) to be highly sensitive to the presence of an ultra-subwavelength nanoscale particle within the nanojet. In the present work, photonic nanojets elongated by almost an order of magnitude (relative to the latest previo...2011-01-01
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