Filters: Collection:"ir_uspace" Type:"Text"
| Title | Creator | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |  | Analog VLSI implementation of a visual interneuron: enhanced sensory processing through biophysical modeling | Harrison, Reid R. | Flies are capable of rapid, coordinated flight through unstructured environments. This flight is guided by visual motion information that is extracted from photoreceptors in a robust manner. One feature of the fly's visual processing that adds to this robustness is the saturation of wide-fi_x000... | 1999-01-01 | |
| 2 |  | Analog VLSI model of the fly elementary motion detector | Harrison, Reid R. | Flies are capable of rapidly detecting and integrating visual motion information in behaviorly-relevant ways. The first stage of visual motion processing in flies is a retinotopic array of functional units known as elementary motion detectors (EMDs). Several decades ago, Reichardt and colleagues de... | 1998-01-01 | |
| 3 |  | Analyses for elucidating current question answering technology | Riloff, Ellen M. | In this paper, we take a detailed look at the performance of components of an idealized question answering system on two diff erent tasks: the TREC Question Answering task and a set of reading comprehension exams. We carry out three types of analysis: inherent properties of the data, feature analys... | TREC Question Answering task | 2001-12 |
| 4 |  | Analysis of circular bordered pit function I. Angiosperm vessels with homogenous pit membranes | Sperry, John S. | A model predicted pit and vessel conductivity, the air-seed pressure for cavitation, and the implosion pressure causing vessel collapse. Predictions were based on measurements from 27 angiosperm species with circular bordered pits and air-seed pressures of 0.2-11.3 MPa. Vessel implosion pressure exc... | Functional wood anatomy; hydraulic architecture; plant biomechanics | 2004 |
| 5 |  | Analysis of circular bordered pit function II. Gymnosperm tracheids with torus-margo pit membranes | Sperry, John S. | A model of xylem conduit function was applied to gymnosperm tracheids with torus-margo pit membranes for comparison with angiosperm vessels. Tracheids from 17 gymnosperm tree species with circular bordered pits and air-seed pressures from 0.8 to 11.8 MPa were analyzed. Tracheids were more reinforced... | Functional wood anatomy; hydraulic architecture; plant biomechanics | 2004 |
| 6 |  | Analysis of diffusion tensor imaging for subjects with Down Syndrome | Gerig, Guido | Authors: Neda Sadeghi1, Clement Vachet1, Marcel Prastawa1, Julie Korenberg1, Guido Gerig1 Institutions: 1University of Utah, Salt Lake City, UT Introduction: Down syndrome (DS) is the most common chromosome abnormality in humans. It is typically associated with delayed cognitive development and phys... | 2013-01-01 | |
| 7 |  | Analysis of electromagnetic field variability in magnetized ionosphere plasma using the stochastic FDTD method | Furse, Cynthia M. | A stochastic finite-difference time-domain (S-FDTD) algorithm is presented for electromagnetic wave propagation in anisotropic magnetized plasma. This new algorithm efficiently calculates in a single simulation not only the mean electromagnetic field values, but also their variance as caused by the ... | 2014-01-01 | |
| 8 |  | Analysis of human brain connectivity from multi-modal imaging | Fletcher, Thomas H. | 2012 | ||
| 9 |  | Analysis of longitudinal shape variability via subject specific growth modeling | Gerig, Guido | Statistical analysis of longitudinal imaging data is crucial for understanding normal anatomical development as well as disease progression. This fundamental task is challenging due to the difficulty in modeling longitudinal changes, such as growth, and comparing changes across different populations... | 2012-01-01 | |
| 10 |  | Analysis of spread spectrum time domain reflectometry for wire fault location | Furse, Cynthia M. | Spread spectrum time domain reflectometry (SSTDR) and sequence time domain reflectometry have been demonstrated to be effective technologies for locating intermittent faults on aircraft wires carrying typical signals in flight. This paper examines the parameters that control the accuracy, latency, ... | Spread spectrum; Sequence time domain reflectometry; STDR; SSTDR; Wire fault location; Aging wire detection; Arc detection | 2005-12 |
| 11 |  | Analysis of the roles of microtubules and actin in erythrophore intracellular motility | Beckerle, Mary C. | The Holocentrus erythrophore, a red pigment cell, represents a model system for the study of organized intracellular transport. We have investigated the possibility that microtubules and actin are integral components of the pigment translocating motility machine. | Actin; Actomyosin; Erythrophore; Pigment | 1983 |
| 12 |  | Analysis of the short-time unbiased spectrum estimation algorithm | Mathews, V. John | Abstract- The short-time unbiased spectrum estimation (STUSE) algorithm is analyzed and expressions for the mean and variance of the spectrum estimates are derived. The STUSE algorithm deliberately adds biased spectrum estimates in order to yield unbiased estimates and at the same time have excellen... | 1985 | |
| 13 |  | Analysis of the surface potential developed by non-reactive ionic solids | Miller, Jan D. | The sign of the surface potential for complex non-reactive ionic solids cannot be predicted solely from consideration of the hydration energy of gaseous ions which constitute the ionic lattice. Accurate analysis of these systems must involve the hydration energy of surface ions, which requires knowl... | Lattice; dipole; madelung constants | 1976 |
| 14 |  | Selective stimulation of peripheral nerve fibers using dual intrafascicular electrodes | Horch, Kenneth W. | We have studied activation of newe fibers by pairs of Pt-Ir wire electrodes implanted within single fascicles of the nerve innervating the gastrocnemius muscle in cats. The purpose of this study was to determine if these intrafascicular electrodes can activate nerve fibers in different fascicles... | Functional electrical stimulation; Intrafascicular stimulation; Silicon electrode array | 1993 |
| 15 |  | Self-assembly of three-dimensional metal islands: nonstrained versus strained islands | Liu, Feng | A theoretical model for the Volmer-Weber growth of three-dimensional metal islands is proposed, with a dipolar island edge-edge interaction. The existence of such an island edge effect makes the island shape dependent on island size. Furthermore, it induces a stable island size against coarsening, l... | Self-assembly; Three dimensional islands; Metal islands; Nonstrained islands; Strained islands; Volmer-Weber growth | 2002-11 |
| 16 |  | Self-assembly of two-dimensional islands via strain-mediated coarsening | Liu, Feng | We demonstrate two distinctive effects of strain-induced island-island interaction on island size and spatial distribution during coarsening of 2D islands. When coarsening proceeds via only mass transport between islands, the interaction broadens the island size distribution, leading to a power-law... | Two-dimensional islands; Strain-mediated coarsening | 2001-08 |
| 17 |  | Self-concepts of low-income older women: not old or poor, but fortunate and blessed | Barusch, Amanda | This article examines the extent to which low-income older women define themselves in stigmatizing terms, then explores the strategies they use to preserve a positive sense of self. Instead of considering themselves "old" or "poor," the sixty-two women interviewed defined themselves as "fortunate" a... | Low-income older women; Stigmatizing terms; Positive thinking | 1997 |
| 18 |  | Self-consistent tight-binding method | Liu, Feng | A self-consistent tight-binding formalism is described. The self-consistency is achieved by the introduction of a chemical hardness matrix and a generalization of the Huckel model to make the tight-binding Hamiltonian an implicit functional of the charge density. Studies of the band structures of d... | Tight-binding method; Self-consistency; Huckel model | 1995-10 |
| 19 |  | Self-organization of semiconductor nanocrystals by selective surface faceting | Liu, Feng | The formation and ordering of Si nanocrystals in dewetting and agglomeration of the thin single crystalline Si layer in silicon-on-insulator has been investigated using low-energy electron microscopy. The evolution of the Si dewetting and agglomeration is captured in real time, revealing the detai... | Self-organization; Surface faceting; Silicon nanocrystals; Dewetting | 2005-12 |
| 20 |  | Self-organization of steps in growth of strained films on vicinal substrates | Liu, Feng | Computer simulations show that if stress is present, steps on a vicinal surface can self-organize into a regular array of step bunches. Such self-organization can provide templates for subsequent fabrication of "quantum wire" nanostructures. The size and spacing of the bunches can be controlled inde... | Self-organization; Strained films; Growth; Vicinal substrates; Step bunches | 1998-02 |
| 21 |  | Self-organized nanoscale pattern formation on vicinal Si(111) surfaces via a two-stage faceting transition | Liu, Feng | We demonstrate a self-organized pattern formation on vicinal Si(111) surfaces that are miscut toward the [211] direction. All the patterns, consisting of a periodic array of alternating (7 X 7) reconstructed terraces and step-bunched facets, have the same periodicity and facet structure, independent... | Vicinal Si(111); Nanoscale pattern formation; Two-stage; Faceting transition | 2002-02 |
| 22 |  | Self-organized quantum-wire lattice via step flow growth of a short-period superlattice | Liu, Feng | We develop a theoretical model for step flow growth of multilayer films, taking into account the interlayer step-step interaction induced by misfit strain.We apply the model to simulate the growth of strain-compensated short-period superlattices. Step-bunch ordering improves in successive layers, le... | Quantum-wire lattice; Short-period superlattice; Step flow growth | 2004-06 |
| 23 |  | Self-organized replication of 3D coherent island size and shape in multilayer heteroepitaxial films | Liu, Feng | A model is proposed to elucidate the evolution of the morphology of strained 3D islands in multilayer heteroepitaxial films. The model explains the experimental observation that islands grown in successive layers not only replicate, forming individual island columns, but self-organize to reach a com... | Coherent island size; Island shape; Heteroepitaxial films; Strained 3D islands; Heteroepitaxial films | 1999-03 |
| 24 |  | Self-selected formation of single discrete supramolecules with flexible, bidentate ligands in the coordination-driven self-assembly | Stang, Peter J. | Flexible donor ligands like 1,2-bis(3-pyridyl)ethyne or 1,4-bis(3-pyridyl)-1,3-butadiyne selfassemble into discrete 2-D supramolecules instead of infinite networks upon combination with organoplatinum 90, 120, and 180 degree acceptor units. These systems are unique examples of versatile pyridine... | Bidentate ligands; Flexible donor ligands; Supramolecules; Coordination-driven self-assembly | 2008 |
| 25 |  | Self-switching Q-damping circuit for reducing transmitter ringdown time in high power pulse NMR | Ailion, David Charles | In this paper we describe a circuit for reducing the transmitter ringdown time and thereby improving the recovery time in pulse NMR experiments. The circuit uses only solid state devices and requires no external switching. For transmitter voltages less than 0.5 V peak to peak the effective resista... | Circuits; NMR experiments; Rf pulse | 1970 |