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Creator | Title | Description | Subject | Date |
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Harrison, Reid R. | Integrating sensorimotor systems in a robot model of cricket behavior | The mechanisms by which animals manage sensorimotor integration and coordination of different behaviors can be investigated in robot models. In previous work the first author has built a robot that localizes sound based on close modeling of the auditory and neural system in the cricket. It is known ... | | 2000 |
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Myers, Chris J. | Timed state space exploration using POSETs | Abstract-This paper presents a new timing analysis algorithm for efficient state space exploration during the synthesis of timed circuits or the verification of timed systems. The source of the computational complexity in the synthesis or verification of a timed system is in finding the reachable ti... | | 2000 |
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Stringfellow, Gerald B.; Shurtleff, James Kevin | Heterostructures in GaInP grown using a change in Te doping | In organometallic vapor phase epitaxy, changes in growth conditions can be used to modulate the extent of CuPt ordering and, hence, the band gap energy of GaInP. One method is to add Te during growth. An increase in the band gap energy of 0.1 eV due to a decrease in ordering has been obtained by ... | Heterostructures; Alloys | 2000 |
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Stringfellow, Gerald B.; Shurtleff, James Kevin | Bi surfactant effects on ordering in GaInP grown by organometallic vapor-phase epitaxy | The effect of the isoelectronic surfactant Bi on surface structure and ordering has been studied for GaInP semiconductor alloys grown by organometallic vapor-phase epitaxy. A small amount of Bi trimethylbismuth added during growth is found to result in disordering for layers grown using conditions t... | Surfactant; Semiconductors; Trimethylbismuth | 2000 |
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Horch, Kenneth W. | Selective activation of muscle groups in the feline hindlimb thorough electrical microstimulation of the ventral lumbo-sacral spinal cord | Selective activation of muscle groups in the feline hindlimb by electrical stimulation of the ventral lumbo-sacral spinal cord was investigated. Spinal cord segments L5 to S1 were mapped using a penetrating tungsten needle electrode. Locations that produced isolated contraction of quadriceps, ti... | Functional electrical stimulation; Motor pools; Spinal chord stimulation | 2000 |
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Capecchi, Mario R. | Lack of angiotensin II-facilitated erythropoiesis causes anemia in angiotensin-converting enzyme-deficient mice | While nephrologists often observe reduced hematocrit associated with inhibitors of angiotensin-converting enzyme (ACE), the basis for this effect is not well understood. We now report that two strains of ACE knockout mice have a normocytic anemia associated with elevated plasma erythropoietin level... | | 2000 |
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Henderson, Thomas C.; McMurtry, Patrick; Smith, Philip J.; Voth, Gregory Alan; Wight, Charles Albert; Pershing, David W. | Simulating accidental fires and explosions | The Center for the Simulation of Accidental Fires and Explosions at the University of Utah focuses on providing state-of-the-art, science-based tools for the numerical simulation of accidental fires and explosions, especially in the context of handling and storing highly flammable materials. | Center for the Simulation of Accidental Fires and Explosions; PBX9501; HMX | 2000 |
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Adler, Frederick R. | Genetic and phylogenetic consequences of island biogeography | Island biogeography theory predicts that the number of species on an island should increase with island size and decrease with island distance to the mainland. These predictions are generally well supported in comparative and experimental studies. These ecological, equilibrium predictions arise as a... | Extinction; Genetic divergence; Island isolation; Migration; Speciation | 2000 |
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Miller, Jan D. | Evaluation of plantwide control strategies for coal preparation plants | The quality of cleaned products from coal preparation plants is often variable due to natural fluctuations in the washability characteristics of the plant feed. To combat this problem, many modern plants have installed on-line analyzers that provide feedback for the real-time control of product q... | Circuit; Yield; Optimization | 2000 |
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Miller, Joel Steven | Effect of thermal annealing on the ferrimagnetic behavior and ordering of the [MnTXPP]+[TCNE].-.solv (X=F, Cl, Br, I; solv = PhMe, CH2Cl2) family of magnets+ | 5,10,15,20-Tetrakis(4-fluorophenyl)porphyrinatomanganese(III) tetracyanoethenide, [MnTFPP][TCNE], 1F, 5,10,15,20-tetrakis(4-bromophenyl)porphyrinatomanganese(III) tetracyanoethenide, [MnTBrPP][TCNE], 1Br, and 5,10,15,20-tetrakis(4-iodophenyl)porphyrinatomanganese(III) tetracyanoethenide, [MnTIPP][T... | Magnetic; Coupling | 2000 |
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Zhang, Lixin | Design a DRAM backend for the impulse memory system | The Impulse Adaptable Memory System is a new memory system that exposes DRAM access patterns not seen in conventional memory systems. Impulse can generate huge number of small DRAM accesses, which will not be handled effectively by a conventional cache-line-size-access-oriented DRAM backend. In this... | DRAM; Backend; Impulse memory system; Impulse Adaptable Memory System; Access patterns | 2000 |
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Johnson, Christopher R. | Computer simulation and visualization in medicine | The goals of medical simulation and visualization are multifaceted. While some simulations and visualizations facilitate diagnosis, others help physicians plan surgery, therapy, and other forms of treatment. Still other simulation and visualization techniques are used for medical training and to acq... | Technology; Computer assisted instruction; Computer graphics | 2000 |
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Stringfellow, Gerald B.; Shurtleff, James Kevin | Adsorption and desorption of the surfactant Sb on GaInP grown by organometallic vapor phase epitaxy | It has been determined that ordering has a profound effect on the bandgap energy of many compound semiconductor alloys. Therefore, ordering must be controlled for devices such as solar cells, light emitting diodes and diode lasers. Since ordering depends on the surface properties during organomet... | Time dependent surface photoabsorption (SPA); Compound semiconductor alloys | 2000 |
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Lupton, John Mark | Bragg scattering from periodically microstructured light emitting diodes | We present a simple method of generating a periodic wavelength scale structure in the optically active layer of a light emitting diode. This is achieved by solution deposition of a light emitting polymer on top of a corrugated substrate. The periodic structure allows waveguide modes normally trapped... | Bragg scattering; Periodic wavelength scale structure | 2000 |
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Henderson, Thomas C. | Reaction-diffusion processes as a computational paradigm | Turing introduced reaction diffusion systems (RD-systems) as a mechanism which made possible the differentiation of morphological structure. We have shown how these systems can be used to provide an information network for smart sensor systems. However, we propose here that reaction diffusion system... | Reaction diffusion systems; RD-systems; Computational paradigm | 2000 |
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Armentrout, Peter B. | Collision-induced dissociation dynamics of the [OCS • C2H2]+ complex. A combined experimental and theoretical study | Collision-induced dissociation (CID) of the [OCS • C2H2]+ complex ion with both Xe and Ar over an energy range of 0 to 10 eV in the center of mass frame is studied using a guided ion beam tandem mass spectrometer. The cross sections of the ionic products observed (C,H2S+, OCS+, C2HJ, and S+) are ... | Collision-induced dissociation; Competitive shift; Ethylene Sulfide cation; Kinetic shift; Thioketene cation; Potential energy surface | 2000 |
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Hansen, Charles D. | Case study of isosurface extraction algorithm performance | Isosurface extraction is an important and useful visualization method. Over the past ten years, the field has seen numerous isosurface techniques published, leaving the user in a quandary about which one should be used. Some papers have published complexity analysis of the techniques, yet empirical... | Isosurfaces; Contours | 2000 |
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Shirley, Peter S.; Gooch, Bruce | Artistic vision: painterly rendering using computer vision techniques | We present a method that takes a raster image as input and produces a painting-like image composed of strokes rather than pixels. Unlike previous automatic painting methods, we attempt to keep the number of brush-stroke small. This is accomplished by first segmenting the image into features, finding... | Painting-like image; Raster image; Painterly rendering | 2000 |
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Miller, Joel Steven; Epstein, Arthur J. | Molecule-based magnets - an overview | Molecule-based* magnets are a broad, emerging class of magnetic materials that expand the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other proper... | Spin; Magnetization; Magnetic ordering | 2000 |
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Ailion, David Charles | 109Ag NMR investigation of atomic motions in the incommensurate and paraelectric phases of proustite (Ag3AsS3) | 109Ag NMR line shape, T1 , Hahn spin echo, and Carr-Purcell-Meiboom-Gill ~CPMG! spin-echo measurements were performed in proustite (Ag3AsS3) between 420 and 47 K in order to understand the role of atomic motions in phase transitions in a system containing an incommensurate phase. These measurements ... | NMR; Atomic motion; Proustitie; Phase transitions; Line shape | 2000 |
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O'Rourke, Dennis H. | Spatial and temporal stability of mtDNA haplogroup frequencies in native North America | Mitochondrial DNA lineage frequencies in prehistoric Aleut, eastern Utah Fremont, Southwestern Anasazi, Pyramid Lake, and Stillwater Marsh skeletal samples from northwest Nevada and the Oneota of western Illinois are compared with those in 41 contemporary aboriginal populations of North America. T... | Mitochondrial DNA; Lineage variation; Haplogroup assignment | 2000 |
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Boehme, Christoph | Diffusion of hydrogen and deuterium in stack systems of SixNyHz/SixNyDz and crystalline Si | H/D-, N-H/D- and Si-H/D-bond density changes were investigated in stacks consisting of a Cz-Si substrate, a thin layer of SiC>2, amorphous deuterated silicon nitride as well as amorphous hydrogenated silicon nitride in order to see if the post deposition anneal of a-SixNyHz layers on crystalline sil... | Hydrogenated silicon nitride; Anneal process | 2000 |
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Olivera, Baldomero M. | Distinction among neuronal subtypes of voltage-activated sodium channels by μ-conotoxin PIIIA | The functional properties of most sodium channels are too similar to permit identification of specific sodium channel types underlying macroscopic current. Such discrimination would be particularly advantageous in the nervous system in which different sodium channel family isoforms are coexpressed i... | Conotoxins; m-conotoxin | 2000 |
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Zhdanov, Michael S. | Electromagnetic inversion using quasi-linear approximation | Three-dimensional electromagnetic inversion continues to be a challenging problem in electrical exploration. We have recently developed a new approach to the solution of this problem based on quasi-linear approximation of a forward modeling operator. It generates a linear equation with respect to ... | Quasi-linear approximation; Electromagnetic inversion | 2000 |
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Bedrov, Dmitro; Smith, Grant D. | Temperature dependent shear viscosity coefficient of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX ): a molecular dynamics simulation study | Equilibrium molecular dynamics methods were used in conjunction with linear response theory and a recently published potential-energy surface [J. Phys. Chem. B 103, 3570 (1999)] to compute the liquid shear viscosity and self-diffusion coefficient of the high explosive HMX (octahydro-1,3,5,7-tetran... | Polymer melts; HMX; Shear viscosity coefficient; Plastic-bonded explosives | 2000 |