Filters: Collection: "ir_uspace"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 176 |
 |
Balasubramonian, Rajeev | Dynamically tuning processor resources with adaptive processing | Using adaptive processing to dynamically tune major microprocessor resources, developers can achieve greater energy efficiency with reasonable hardware and software overhead while avoiding undue performance loss. | Adaptive processing; Energy efficiency; DRI-cache | 2003-12 |
| 177 |
 |
Olson, Randall J. | Efficacy and wound-temperature gradient of WhiteStar technology phacoemulsification through a 1.2 mm incision | PURPOSE: To evaluate the efficacy and wound-temperature gradients of WhiteStar micropulse technology using bimanual phacoemulsification without an irrigation sleeve through a 1.2 mm incision. SETTING: Island Eye Surgicenter, Carle Place, New York, USA. METHODS: Ten patients had bimanual phacoemulsif... | Endothelium, Corneal; Surgical Procedures; Lens Implantation; Wound Temperature gradient | 2003-06 |
| 178 |
 |
Boehme, Christoph | Electrical detection of spin coherence in silicon | Experimental evidence is presented showing that photocurrents in silicon can be used as highly sensitive readout probes for coherent spin states of localized electrons, the prime candidates for quantum bits in various semiconductor based quantum computer concepts. Conduction electrons are subjected ... | Spin coherence; Electronic transitions; Rabi oscillation | 2003-12 |
| 179 |
 |
DeTar, Carleton | Exotic hybrid mesons from improved Kogut-Susskind fermions | We summarize our measurement of the mass of the exotic 1−+ hybrid meson using an improved Kogut-Susskind action. We show results from both quenched and dynamical quark simulations and compare with results from Wilson quarks. Extrapolation of these results to the physical quark mass allows compar... | Chromomagnetic field; Kogut-Susskind fermions; Wilson quarks | 2003-05 |
| 180 |
 |
Vardeny, Zeev Valentine | Fabrication and properties of gallium metallic photonic crystals | Gallium metallic photonic crystals with 100% filling factor have been fabricated via infiltration of liquid gallium into opals of 300-nm silica spheres using a novel high pressure-high temperature technique. The electrical resistance of the Ga-opal crystals was measured at temperatures from 10 to 2... | 2003-10 | |
| 181 |
 |
Gondolo, Paolo | Fluid interpretation of Cardassian expansion | A fluid interpretation of Cardassian expansion is developed. Here, the Friedmann equation takes the form H2=g(ρM) where ρM contains only matter and radiation ~no vacuum!. The function g(ρM) returns to the usual 8πM /(3mpl 2 ) during the early history of the Universe, but takes a different form... | Cardassian expansion; Friedmann equation | 2003-09 |
| 182 |
 |
Furse, Cynthia M. | Frequency-domain reflectometery for on-board testing of aging aircraft wiring | Aging aircraft wiring poses a significant safety threat and has been implicated in losses of both military and commercial aircraft. This paper describes the conceptual design and function of a "smart wiring system" based on a low-cost frequency-domain reflectometer (FDR) that can be used to test th... | Frequency domain reflectometry; Aging wiring; On board testing | 2003-05 |
| 183 |
 |
Hansen, Charles D. | Graphics applications for grid computing | The first article, "Enabling View-Dependent Progressive Volume Visualization on the Grid" by Alan Norton and Alyn Rockwood describes and evaluates the communication in a progressive, visibility-driven compression scheme for distributing volumetric data from grid resources to volume-rendering clien... | Grid computing | 2003-03 |
| 184 |
 |
DeTar, Carleton | Heavy-light meson decay constants with N f = 3 | During the past year the MILC Collaboration has continued its study of heavy-light meson decay constants with three dynamical quarks. Calculations have been extended to a second lattice spacing of about 0.09 fm. At this lattice spacing, there are results in the quenched approximation and for thr... | Dynamical quarks | 2003-05 |
| 185 |
 |
Hansen, Charles D. | Illustrative interactive stipple rendering | Abstract-Simulating hand-drawn illustration can succinctly express information in a manner that is communicative and informative. We present a framework for an interactive direct stipple rendering of volume and surface-based objects. By combining the principles of artistic and scientific illustratio... | 2003-04 | |
| 186 |
 |
Gondolo, Paolo | Improved constraints on supersymmetric dark matter from muon g-2 | The new measurement of the anomalous magnetic moment of the muon by the Brookhaven AGS experiment 821 again shows a discrepancy with the standard model value. We investigate the consequences of these new data for neutralino dark matter, updating and extending our previous work [E. A. Baltz and P. ... | Magnetic moment; Neutralinos | 2003-03 |
| 187 |
 |
Couldwell, William T. | Increased invasive capacity of connexin43-overexpressing malignant glioma cells | Object. Malignant glioma cells, similar to astrocytes, express connexin43 (Cx43) universally but at widely varied levels. Data from previous studies have demonstrated that malignant glioma cells form functional gap junction channels among themselves as well as with astrocytes and that such a communi... | 2003-12 | |
| 188 |
 |
Gondolo, Paolo | Indirect detection of a subdominant density component of cold dark matter | We examine the detectability through indirect means of weakly interacting dark matter candidates that may constitute not all but only a subdominant component of galactic cold dark matter. We show that the possibility of indirect detection of neutralinos from their annihilations in the Earth and Su... | WIMP; Weakly interacting massive particles; Annihilations | 2003-01 |
| 189 |
 |
Kowaleski-Jones, Lori | Influence of participation in the national school lunch program and food insecurity on child well-being | This study examines two research questions: the child- and family-specific factors that predict food insecurity and participation in the National School Lunch Program (NSLP) and the effects on school-age children of food insecurity and participating in the NSLP. Results show that factors representin... | Children's nutrition; Children's diet; Child development | 2003-03 |
| 190 |
 |
DeTar, Carleton | Lattice calculation of 1-+ hybrid mesons with improved Kogut-Susskind fermions | We report on a lattice determination of the mass of the exotic 1-+ hybrid meson using an improved Kogut-Susskind action. Results from both quenched and dynamical quark simulations are presented. We also compare with earlier results using Wilson quarks at heavier quark masses. The results on lattice... | Staggered quarks; Kogut-Susskind fermions | 2003-10 |
| 191 |
 |
DeTar, Carleton | Light hadron properties with improved staggered quarks | Preliminary results from simulations with 2+1 dynamical quark flavors at a lattice spacing of 0.09 fm are combined with earlier results at a = 0.13 fm. We examine the approach to the continuum limit and investigate the dependence of the pseudoscalar masses and decay constants as the sea and valence... | Staggered quarks | 2003-05 |
| 192 |
 |
Vardeny, Zeev Valentine; Ehrenfreund, Eitan A. | Linear and nonlinear photoexcitation dynamics in ∏-conjugated polymers | Linear and nonlinear recombination kinetics with various lifetime distributions were identified for long-lived photoexcitations in a series of rr-conjugated polymer films using modulation frequency and excitation intensity dependencies of the photoinduced absorption. This includes monomolecular, bim... | Linear photoexcitation; Nonlinear photoexcitation; pi-conjugated polymers; Recombination kinetics | 2003-01 |
| 193 |
 |
Lupton, John Mark | Linewidth-limited energy transfer in single conjugated polymer molecules | Using low temperature single molecule spectroscopy on rigid-rod conjugated polymers we are able to identify homogeneously broadened, strongly polarized emission from individual chromophore units on a single chain. Gated fluorescence spectroscopy allows real time imaging of intramolecular energy tran... | Linewidth-limited; Energy transfer; Rigid-rod; Single molecule spectroscopy; Gated fluorescence spectroscopy; Chromophores; Intramolecular energy transfer; Spectral linewidth | 2003-12 |
| 194 |
 |
Harrison, Reid R. | Low-power low-noise CMOS amplifier for neural recording applications | There is a need among scientists and clinicians for low-noise low-power biosignal amplifiers capable of amplifying signals in the millihertz-to-kilohertz range while rejecting large dc offsets generated at the electrode-tissue interface. The advent of fully implantable multielectrode arrays has cre... | Bioamplifier; Analog integrated circuits; Biosignal amplifier; Low noise; Low-power circuit design; Neural recordings; Neural amplifier; Noise efficiency factor; Subthreshold circuit design; Weak inversion | 2003-06 |
| 195 |
 |
Gondolo, Paolo | Measuring the prompt atmospheric neutrino flux with down-going muons in neutrino telescopes | In the TeV energy region and above, the uncertainty in the level of prompt atmospheric neutrinos would limit the search for diffuse astrophysical neutrinos. We suggest that neutrino telescopes may provide an empirical determination of the flux of prompt atmospheric electron and muon neutrinos by mea... | Neutrino telescopes; Prompt flux | 2003-01 |
| 196 |
 |
Liu, Feng | Metal-to-semiconductor transition in squashed armchair carbon nanotubes | We investigate electronic transport properties of the squashed armchair carbon nanotubes, using tight-binding molecular dynamics and the Green's function method. We demonstrate a metal-to-semiconductor transition while squashing the nanotubes and a general mechanism for such a transition. It is the ... | Squashed armchair; Carbon nanotubes; Metal-to-semiconductor transition; Electronic transport; Tight-binding molecular dynamics; Squashed nanotubes | 2003-04 |
| 197 |
 |
Hansen, Charles D. | Model for volume lighting and modeling | Abstract-Direct volume rendering is a commonly used technique in visualization applications. Many of these applications require sophisticated shading models to capture subtle lighting effects and characteristics of volumetric data and materials. For many volumes, homogeneous regions pose problems f... | 2003-04 | |
| 198 |
 |
Wu, Yong-Shi | Moyal representation of the string field star product in the presence of a B background | In this paper we show that in the presence of an antisymmetric tensor B background, Witten's star algebra for open string fields persists to possess the structure of a direct product of commuting Moyal pairs. The interplay between the noncommutativity due to three-string overlap and that due to the ... | String theory; Moyal pairs; Moyal structure; Noncommutativity | 2003-06 |
| 199 |
 |
Mattis, Daniel C. | Partially frustrated Ising models in two dimensions | We examine ordered, periodic, Ising models on a sq lattice at varying levels x of frustration. The thermodynamic singularity of the fully frustrated model (x=1) is at T=0 while those of partially frustrated lattices (0<x<1) occur at finite Tc . The critical indices in the partially frustrated latti... | Antiferromagnets; Frustration; Ising chain | 2003-06 |
| 200 |
 |
Wu, Yong-Shi | Quantum phase transition in a multicomponent Bose-Einstein condensate in optical lattices | We present a general lattice model for a multicomponent atomic Bose-Einstein system in an optical lattice. Using the model, we analytically study the quantum phase transition between the Mott insulator and a superfluid. A mean-field theory is developed from the Mott-insulator ground state. When the... | Quantum phase transitions; Optical lattices; Bose-Einstein condensation; Boson-Hubbard model; Superfluids | 2003-01 |