A5103023837- Advanced Semiconductor Detectors and Materials
- Semiconductor Quantum Structures and Devices
- Chalcogenide Semiconductor Thin Films
- Hydraulic Fracturing and Reservoir Analysis
- Infrared Target Detection Methodologies
- Drilling and Well Engineering
- Fluid Dynamics Simulations and Interactions
- Advanced X-ray and CT Imaging
- Machine Learning in Materials Science
- Seismic Imaging and Inversion Techniques
- Geotechnical and Geomechanical Engineering
- Granular flow and fluidized beds
- Groundwater flow and contamination studies
- Rock Mechanics and Modeling
- Lipid metabolism and biosynthesis
- Landslides and related hazards
- Thermography and Photoacoustic Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Reservoir Engineering and Simulation Methods
- Radiation Detection and Scintillator Technologies
- Electronic and Structural Properties of Oxides
- Optical and Acousto-Optic Technologies
- Plasma Diagnostics and Applications
- Calibration and Measurement Techniques
- Spectroscopy and Laser Applications
Mayo Clinic
2020-2024
WinnMed
2023
University of Minnesota Rochester
2020-2023
Mayo Clinic in Arizona
2020-2023
RTX (United States)
2011-2022
Washington University in St. Louis
2020
Lawrence Livermore National Laboratory
2007-2015
General Numerics Research Lab
2015
Grainflow Dynamics (United States)
2009-2013
Purdue University West Lafayette
2009
SUMMARY Modeling hydraulic fracturing in the presence of a natural fracture network is challenging task, owing to complex interactions between fluid, rock matrix, and interfaces, as well propagating fractures existing interfaces. Understanding these through numerical modeling critical design optimum stimulation strategies. In this paper, we present an explicitly integrated, fully coupled discrete‐finite element approach for simulation arbitrary networks. The individual physical processes...
The I148M variant of PNPLA3 is closely associated with hepatic steatosis. Recent evidence indicates that the mutant functions as an inhibitor PNPLA2/ATGL-mediated lipolysis, leaving role wild-type undefined. Despite showing a triglyceride hydrolase activity in vitro, has yet to be established lipase vivo. Here, we show preferentially hydrolyzes polyunsaturated triglycerides, mobilizing fatty acids for phospholipid desaturation and enhancing secretion triglyceride-rich lipoproteins. Under...
The quantitative effects of dislocations on the electrical and optical properties long-wavelength infrared (LWIR) HgCdTe photovoltaic detectors was determined by deliberately introducing into localized regions two high-performance arrays having cutoff wavelengths 9.5 10.3 μm at T=78 K. Results show that can have a dramatic effect detector R0A product, particularly temperatures below 78 For large dislocation densities, decreases as square density; onset dependence occurs progressively lower...
The paper presents a description of the methods used to model rock as discontinuous media. objective work is bring geomechanics community recent advances in numerical modeling field mechanics. following are included: (1) distinct element method; (2) deformation analysis and (3) bonded particle method. A brief fundamental algorithms that apply each method included, well simple case illustrate their use.
The InAs/Ga1−xInxSb strained-layer superlattice (SLS) holds promise as an alternative III–V semiconductor system for long wavelength infrared detectors. In this article, we present the first investigation, to best of our knowledge, heterojunction photodiodes using new material. devices were grown by molecular beam epitaxy on GaSb substrates, and are comprised a 38 Å InAs/16 Ga0.64In0.36Sb SLS used in double heterojunctions with contact layers. structures designed optimize quantum efficiency...
The composition of high-quality single-crystal bulk-grown Cd1−yZnyTe (0≤y≤0.2) was determined from precision lattice constant measurements for a total 22 data points. These samples were used to develop calibration curves an accurate, contactless, nondestructive optical determination using either 300 K transmission or 77 photoluminescence measurements. technique is useful bulk CdZnTe wafers while the PL applicable both and thin-film CdZnTe. Both techniques are in determining range which...
We report on the investigation of lateral diffusion minority carriers in InAsSb based photodetectors with nBn design. Diffusion lengths (DLs) were extracted from temperature dependent I-V measurements. The behavior DL as a function applied bias, temperature, and composition barrier layer was investigated. obtained results suggest that is not limiting factor for mid-wave infrared detector performance at high temperatures (>200 K). an As mole fraction 10% has demonstrated values low 7...
High crystalline quality epitaxial CdTe(112)B/ZnTe films were deposited by molecular-beam epitaxy directly onto vicinal Si(112) substrates, without use of GaAs interfacial layers. The characterized with x-ray diffraction, optical microscopy, and wet chemical defect etching. Single crystal, twin-free CdTe(112)B exhibit structural exceeding that previously reported for heteroepitaxy on GaAs/Si(112) or GaAs(112)B substrates. X-ray rocking curve full width at half-maximum 72 arcsec CdTe(224)...
High quality p-on-n heterojunction infrared detectors have been fabricated using controllably doped HgCdTe grown by liquid phase epitaxy on CdZnTe/GaAs/Si alternative substrates metalorganic chemical vapor deposition and used to demonstrate the first 128×128 focal plane array these materials. Detectors with a cutoff wavelength of 6.0 μm resistance-area product R0 Aj average 6.0×104 Ω cm2 at 80 K for 16 189 in were achieved, operating temperatures above approximately 120 comparable...
Abstract The resolution of translational motion in discrete element method and molecular dynamics applications is a straightforward task; however, resolving rotational less obvious. Many update rotation using an explicit integration involving products matrices, which has well‐known drawbacks. Although rigid body received attention large‐angle applications, relatively little been dedicated to the unique requirements particle methods time‐stepping algorithms. This paper reviews existing...
Raytheon Vision Systems (RVS) is developing two-color, large-format infrared FPAs to support the US Army's Third Generation FLIR systems. RVS has produced 640 x 480 two-color with a 20 micron pixel pitch. Work also underway demonstrate 1280 720 FPA in 2005. The architecture been designed achieve nearly simultaneous temporal detection of spectral bands while being producible for dimensions as small microns. Raytheon's approach employs readout integrated circuit (ROIC) Time Division...