UScholar Works
 
Filters: Collection: "ir_uspace"
951 - 975 of 10,886
Number of results to display per page
CreatorTitleDescriptionSubjectDate
951 DeTar, CarletonB̄→D*ℓν̄ form factor at zero recoil from three-flavor lattice QCD: a model independent determination of [Vcb]We present the first lattice QCD calculation of the form factor for B→ D* lv with three flavors of sea quarks. We use an improved staggered action for the light valence and sea quarks (the MILC configurations), and the Fermilab action for the heavy quarks. The form factor is computed at zero recoi...Staggered quarks2009-01
952 DeTar, CarletonB→πlν semileptonic form factor from three-flavor lattice QCD: a model-independent determination of [Vub]We calculate the form factor f+(q2) for B-meson semileptonic decay in unquenched lattice QCD with 2 + 1 flavors of light sea quarks. We use Asqtad-improved staggered light quarks and a Fermilab bottom quark on gauge configurations generated by the MILC Collaboration. We simulate with several light...Semileptonic decay2009-03
953 Blumenthal, Donald K.C subunits binding to the protein kinase A RI alpha dimer induce a large conformational change.We present structural data on the RI alpha isoform of the cAMP-dependent protein kinase A that reveal, for the first time, a large scale conformational change within the RI alpha homodimer upon catalytic subunit binding. This result infers that the inhibition of catalytic subunit activity is not the...Protein Kinase; cAMP2004-04-30
954 Armentrout, Peter B.C+(2P) + H2(D2,HD)→CH+(CD+) + H(D). I. Reaction cross sections and kinetic isotope effects from threshold to 15 eV c.m.Total cross sections for the reactions of carbon (1 + ) ions with isotopic molecular hydrogen (H2, D2 , and HD) to form methyliumylidene (CH+ and C D + ) have been measured using guided ion beam techniques. Cross sections are reported as a function of the translational energy of the reactants fro...Ion-molecule reactions; Isotope effects; Translational energy; Threshold behavior; Endothermic reactions1986
955 Armentrout, Peter B.C+(2P)+H2(D2,HD)→CH+(CD+)+H(D). I. Reaction cross sections and kinetic isotope effects from threshold to 15eV c.m.Total cross sections for the reactions of carbon (1 + ) ions with isotopic molecular hydrogen (H2, D2, and HD) to form methyliumylidene (CH+ and CD+) have been measured using guided ion beam techniques. Cross sections are reported as a function of the translational energy of the reactants from th...Methyliumylidene; Endothermic reactions; Isotope effect; Threshold energy1986
956 Borodai, Anastasia S.C-F bond activationActivation of Carbon-Fluorine Bonds in 2', 3', 4', 5', 6'-Pentafluoroacetophenone through a Transition Metal Complex- Manganese PentacarbonylCarbon; Fluorine; Bond; Activation2014-05-30
957 Wu, Yong-ShiC-functions of noncommutative Yang-Mills theory from holographyIn this paper we study non-commutative Yang-Mills theory (NCYM) through its gravity dual. First it is shown that the gravity dual of an NCYM with self-dual θ-parameters has a Lagrangian in the form of five-dimensional dilatonic gravity. Then we use the de-Boer-Verlinde-Verlinde formalism for holog...2000-05-01
958 Starkey, MikeC-RISC A C language reduced instruction set computerThis project is the implementation of a Reduced Instruction Set Computer (RISC) on a tiny chip. RISC technology is based on the idea that a small number of simple instructions can be used to create a fast, flexible computer. Our RISC uses this principle while staying within the confines of the tiny ...RISC; C language1990
959 Battin, Margaret P.C. G. Prado, choosing to die: elective death and multiculturalismThe central practical issue that this thorough, stimulating, and important book addresses is whether suicide can be rational in the context of terminal illness. Answers to this issue can be readily formulated in the familiar context of western political thought, with its liberal paradigm of autonomy...2008
960 Frey, Lewis J.ca! - emergency and disaster recovery system extensions to caBIG™During Hurricane Katrina, US Federal and State Agencies had disparate data acquisition systems, separate data networks and unique incompatible applications. •System incompatibilities exist even between various Federal agencies. •Consistent data available to one agency should be available to an...caBIG; Data acquisition systems; Data sharing; Information sharing; Trapeze Interactive Poster2009-09-23
961 Stevens, KennethCA-BIST for asynchronous circuits: a case study on the RAPPID asynchronous instruction length decoderThis paper presents a case study in low-cost noninvasive Built-In Self Test (BIST) for RAPPID, a largescale 120,000-transistor asynchronous version of the Pentium® Pro Instruction Length Decoder, which runs at 3.6 GHz. RAPPID uses a synchronous 0.25 micron CMOS library for static and domino lo...2000
962 Poulter, Charles DaleCaaX proteases, Afc1p and Rce1p, have overlapping but distinct substrate specificitiesMany proteins that contain a carboxyl-terminal CaaX sequence motif, including Ras and yeast a-factor, undergo a series of sequential posttranslational processing steps. Following the initial prenylation of the cysteine, the three C-terminal amino acids are proteolytically removed, and the newly fo...Proteins; Enzymes; Hydrophobic2000
963 Rosen, Paul AndrewCache ensemble analysis for understanding algorithmic memory performance2012
964 Weinstein, DavidCache-rings for memory efficient isosurface constructionProcessor speeds continue to increase at faster rates than memory speeds. As this performance gap widens, it becomes increasingly important to develop "memory-conscious" algorithms - programs that still optimize instruction count and algorithmic complexity, but that also integrate optimizations for ...Processor speeds; Memory speeds; Computer memory; Cache-rings1997
965 Stevens, KennethCAD directions for high performance asynchronous circuitsThis paper describes a novel methodology for high performance asynchronous design based on timed circuits and on CAD support for their synthesis using Relative Timing. This methodology was developed for a prototype iA32 instruction length decoding and steering unit called RAPPID ("Revolving Asynchro...1999
966 Hansen, Charles D.; Henderson, Thomas C.CAD-based 3-D object recognitionWe propose an approach to 3-D object recognition using CAD-based geometry models for freeform surfaces. Geometry is modeled with rational B-splines by defining surface patches and then combining these into a volumetric model of the object. Characteristic features are then extracted from this model ...Object recognition; Strategy trees; Geometric knowledge representation; Automatic feature selection1989
967 Hansen, Charles D.CAD-based computer vision: the automatic generation of recognition stragtegiesThree-dimensional model-based computer vision uses geometric models of objects and sensed data to recognize objects in a scene. Likewise, Computer Aided Design (CAD) systems are used to interactively generate three-dimensional models during these fields. Recently, the unification of CAD and vision s...1988
968 Hansen, Charles D.; Henderson, Thomas C.CAD-based roboticsWe describe an approach which facilitates and makes explicit the organization of the knowledge necessary to map robotic system requirements onto an appropriate assembly of algorithms, processors, sensor, and actuators. In order to achieve this mapping, several kinds of knowledge are needed. In this ...CAD-based robotics; CAD-based vision; CAGD System1987
969 Jorgensen, ErikCaenorhabditis elegans gene unc-25 encodes glutamic acid decarboxylase and is required for synaptic transmission but not synaptic developmentThe neurotransmitter GABA has been proposed to play a role during nervous system development. We show that the Caenorhabditis elegans gene unc-25 encodes glutamic acid decarboxylase (GAD), the GABA biosynthetic enzyme. unc-25 is expressed specifically in GABAergic neurons. Null mutations in unc-25...1999
970 Jorgensen, ErikCaenorhabditis elegans rab-3 mutant synapses exhibit impaired function and are partially depleted of vesiclesRab molecules regulate vesicular trafficking in many different exocytic and endocytic transport pathways in eukaryotic cells. In neurons, rab3 has been proposed to play a crucial role in regulating synaptic vesicle release. To elucidate the role of rab3 in synaptic transmission, we isolated and cha...1997
971 Jorgensen, ErikCaenorhabditis elegans unc-49 locus encodes multiple subunits of a heteromultimeric GABA receptorIonotropic GABA receptors generally require the products of three subunit genes. By contrast, the GABA receptor needed for locomotion in Caenorhabditis elegans requires only the unc-49 gene. We cloned unc-49 and demonstrated that it possesses an unusual overlapping gene structure.1999
972 Henderson, Thomas C.; Bhanu, BirCAGD based 3-D visual recognitionA coherent automated manufacturing system needs to include CAD/CAM, computer vision, and object manipulation. Currently, most systems which support CAD/CAM do not provide for vision or manipulation and similarly, vision and manipulation systems incorporate no explicit relation to CAD/CAM models. CAD...Object manipulation; CAGD1985
973 Hansen, Charles D.; Henderson, Thomas C.CAGD based 3-D visual recognitionA coherent automated manufacturing system needs to include CAD/CAM, computer vision, and object manipulation. Currently, most systems which support CAD/CAM do not provide for vision or manipulation and similarly, vision and manipulation systems incorporate no explicit relation to CAD/CAM models. CAD...Visual recognition; Computer Aided Geometric Design (CAGD)1986
974 Hansen, Charles D.; Henderson, Thomas C.CAGD-based computer visionThree-dimensional model-based computer vision uses geometric models of objects and sensed data to recognize objects in a scene. Likewise, Computer Aided Geometric Design (CAGD) systems are used to interactively generate three-dimensional models during the design process. Despite this similarity, the...Computer Aided Geometric Design (CAGD); CAD-based vision; Model based vision; Strategy trees; Geometric knowledge representation; Automatic feature selection1987
975 Hansen, Charles D.CAGD-based computer visionAbstract-Three-dimensional model-based computer vision uses geometric models of objects and sensed data to recognize objects in a scene. Likewise, computer aided geometric design (CAGD) systems are used to interactively generate three-dimensional models during the design process. Despite this simil...1989-11
951 - 975 of 10,886