Filters: Date: "2002" Collection: "ir_uspace"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 26 |
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Gesteland, Raymond F.; Wills, Norma M.; Atkins, John F. | Comparative studies of frameshifting and nonframeshifting RNA pseudoknots: a mutational and NMR investigation of pseudoknots derived from the bacteriophage T2 gene 32 mRNA and the retroviral gag-pro frameshift site | Mutational and NMR methods were used to investigate features of sequence, structure, and dynamics that are associated with the ability of a pseudoknot to stimulate a "1 frameshift. In vitro frameshift assays were performed on retroviral gag-pro frameshift-stimulating pseudoknots and their derivati... | Frameshifting; NMR; Pseudoknot; Retrovirus | 2002 |
| 27 |
 |
Dailey, Andrew T.; Brodke, Darrel S. | Comparison of computerized tomography and direct visualization in thoracic pedicle screw placement | Object. To validate computerized tomography (CT) scanning as a tool to assess the accuracy of thoracic pedicle screw placement, the authors compared its accuracy with that of direct visualization in instrumented cadaveric spine specimens. Methods. A grading scale was devised to score the placement... | Computerized tomography; Direct visualization; Thoracic pedicle screw; Pedicle; Thoracic spine | 2002 |
| 28 |
 |
Bedrov, Dmitro; Smith, Grant D. | Comparison of self-assembly in lattice and off-lattice model amphiphile solutions | Lattice Monte Carlo and off-lattice molecular dynamics simulations of h1t4 and h4t1 (head/tail) amphiphile solutions have been performed as a function of surfactant concentration and temperature. The lattice and off-lattice systems exhibit quite different self-assembly behavior at equivalent ther... | Amphiphile solutions; Micellization; Surfactants | 2002 |
| 29 |
 |
Miller, Jan D. | Cone beam X-ray microtomography - a new facility for three-dimensional analysis of multiphase materials | As the techniques and resolution for three-dimensional spatial analysis have advanced in the last decade, it is now possible to map in detail the micro structure of multiphase materials in three-dimensional digital space. In this regard, three-dimensional X-ray microtomography offers a unique imagin... | Cone beam X-ray microtomography; Three-dimensional analysis; Material characterization | 2002 |
| 30 |
 |
McDaniel, Susan | Continuities and transformations: challenges to capturing information about the 'Information Society' | Continuous change and radical transformations are intrinsic and often contradictory in the 'Information Society.' If the 'Information Society' marks a radical social shift, i.e. discontinuous change, then theorizing what the phenomenon is becomes crucial in capturing useful information about it. Yet... | Social process; Information; Computer technologies | 2002 |
| 31 |
 |
Tiwari, Ashutosh | Copper diffusion characteristics in single-crystal and polycrystalline TaN | We have investigated the diffusivity of copper in single-crystal (NaCl-structured) and polycrystalline TaN thin films grown by pulsed-laser deposition. Polycrystalline TaN films were grown directly on Si(100), while single-crystal films were grown with TiN buffer layers. Both poly- and single-crysta... | Diffusion barriers; Copper diffusion; Tantalum nitride | 2002 |
| 32 |
 |
Kestle, John R. W. | Cost-effectiveness analysis of endoscopic third ventriculostomy | OBJECTIVE: Endoscopic third ventriculostomy (ETV) is currently the principal alternative to cerebrospinal fluid shunt placement in the management of pediatric hydrocephalus. Cost-effectiveness analysis can help determine the optimal strategy for integrating these different approaches. METHODS: All... | Endoscopic third ventriculostomy; ETV | 2002 |
| 33 |
 |
Svedin, Lina | Crisis management in Russia: overcoming institutional rigidity and resource constraints | The editors would like to express their gratitude to a number of persons and institutions for making this book on Russian crisis management possible. We are grateful for the generous financial support from the Swedish Agency for Civil Emergency Planning (?CB) which has made the CM Europe program (of... | 2002 | |
| 34 |
 |
Webster, Maryann Sorensen | Cybermuse | Form: object/sculpture; Medium: porcelain, china paint, circuit boards; Dimensions: 18 x 15 x 5"" | 2002 | |
| 35 |
 |
Kestle, John R. W. | Death after late failure of third ventriculostomy in children | Late failure following successful third ventriculostomy for obstructive hydrocephalus is rare, and death caused by failure of a previously successful third ventriculostomy has been reported only once. The authors present three patients who died as a result of increased intracranial pressure (ICP) a... | Ventriculostomy; Obstructive hydrocephalus; Late failure; Death | 2002 |
| 36 |
 |
Francis, Leslie | Decisionmaking at the end of life: patients with Alzheimer's and other dementias | Patients with dementia present difficult issues for health-care decisionmaking. This article addresses the moral and legal issues posed by end of life decisionmaking for such patients. In general, the ethical goals of care are to assure that patients' choices are respected and that patients' best i... | Incompetence; Precedent economy | 2002 |
| 37 |
 |
Jaskowski, Troy D. | Determination of cytokine responses using a multiplexed fluorescent microsphere immunoassay | We used a multiplexed fluorescent microsphere immunoassay to develop a sandwich capture assay to assess simultaneously the production of thymus helper (TH) 1- and TH2-type cytokines in tissue culture supernatant obtained from stimulated peripheral blood mononuclear cells. The assay then was use... | Multiplexed fluorescent microsphere immunoassay | 2002 |
| 38 |
 |
Yu, Zhou | Does immigration induce urban sprawl? A dynamic demographic analysis for the U. S. | This article, utilizing U.S. Census data from 1980 and 1990, probes the relationship between immigration and urban sprawl. The preliminary findings reveal that native-born and foreign-born populations are very different regarding their household behaviors. Population growth caused by immigration is... | Urban sprawl; Immigration; Household growth; Population growth | 2002 |
| 39 |
 |
Fogel, Alan Dale | Dynamic systems theory places the scientist in the system | Dynamic systems theory is a way of describing the patterns that emerge from relationships in the universe. In the study of interpersonal relationships, within and between species, the scientist is an active and engaged participant in those relationships. Separation between self and other, scientist... | 2002 | |
| 40 |
 |
Ailion, David Charles | Dynamics of the pinned modulation wave in incommensurate bis (4-chlorophenyl) sulfone (BCPS) | We show that both the anomalously huge resonance-frequency dependence of the 3 5Cl nuclear quadrupole resonance (NQR) spin-lattice relaxation time in BCPS, reported here for the first time, and its anomalous temperature dependence can be explained by large-scale fluctuations of the pinned modulation... | NQR; Spin-lattice; Relaxation-time; Pinned modulation wave | 2002 |
| 41 |
 |
Coley, Phyllis D.; Kursar, Thomas A. | Effects of weather on fungal abundance and richness among 25 communities in the Intermountain West | Because moisture and temperature influence the growth of fungi, characterizing weather conditions favorable for fungi may be used to predict the abundance and richness of fungi in habitats with different climate conditions. To estimate habitat favorability to fungi, we examined the relationship of f... | Intermountain West; Utah; Microclimate; Fungal prevalence | 2002 |
| 42 |
 |
Balasubramonian, Rajeev | Energy-efficient processor design using multiple clock domains with dynamic voltage and frequency scaling | As clock frequency increases and feature size decreases, clock distribution and wire delays present a growing challenge to the designers of singly-clocked, globally synchronous systems. We describe an alternative approach, which we call a Multiple Clock Domain (MCD) processor in which the chip is d... | Multiple clock domains; Synchronization; Microarchitecture | 2002 |
| 43 |
 |
Scarpulla, Michael | Enhanced nitrogen incorporation by pulsed laser annealing of GaNxAs1-x formed by N ion implantation | We demonstrate that pulsed laser annealing followed by rapid thermal annealing greatly enhances incorporation of substitutional N in N1-implanted GaAs. Films implanted to 1.8% N exhibit a fundamental band gap of 1.26 eV (a band gap reduction of 160 meV), corresponding to an N activation efficiency ... | Highly mismatched alloys; Gallium arsenide | 2002 |
| 44 |
 |
Tiwari, Ashutosh | Epitaxial growth of TaN films on Si(100) and Si(111) using a TiN buffer layer | We have deposited high-quality epitaxial B1 NaCl-structured TaN films on Si(100) and Si(111) substrates with TiN as the buffer layer, using pulsed laser deposition. Our method exploits the concept of lattice-matching epitaxy between TiN and TaN and domain-matching epitaxy between TiN and silicon. X... | Diffusion barriers; Buffer layers; Tantalum nitride; Silicon substrate | 2002 |
| 45 |
 |
Tiwari, Ashutosh | Epitaxial growth of ZnO films on Si(111) | In this paper, we report the growth of ZnO films on silicon substrates using a pulsed laser deposition technique. These films were deposited on Si(111) directly as well as by using thin buffer layers of AlN and GaN. All the films were found to have c-axis-preferred orientation aligned with normal to... | Buffer layers; Aluminum nitride; Silicon substrate; Biaxial strain | 2002 |
| 46 |
 |
Ehleringer, James R. | Evaluación de la capacidad estacional de utilizar eventos de preciptación en tres especies de arbustos nativos de Chile con distintos sistemas radiculares | Se evaluó la capacidad estacional de utilizar un evento de precipitación en tres especies arbustivas con diferentes sistemas radiculares (dimórficos: Balbisia peduncularis, Senna cumingii; profundo: Haplopappus parvifolius) en la Quebrada El Romeral, norte-centro de Chile. El sitio posee un clima... | Fuentes de agua; Proporción de isótopos estables; Sistema radicular; Desertificación; Zonas áridas; Chile; Water sources; Stable isotopes ratio; Root system; Arid zone; Balbisia peduncularis; Senna cummingii; Haplopappus parvifolius | 2002 |
| 47 |
 |
Miller, Jan D. | Evaluation of a CT-based coal washability analysis system under simulated on-line conditions | The appropriate software and hardware necessary to adapt an X-ray CTanalyzerfor the determination of coal washability was developed and successfully tested for well-characterized samples under laboratory conditions. Evaluation of the CT-based analyzer under simulated on-line conditions is also prese... | Coal washability; Computer simulation; X-ray CT analysis | 2002 |
| 48 |
 |
Vardeny, Zeev Valentine; Raikh, Mikhail E. | Evidence for braggoriton excitations in opal photonic crystals infiltrated with highly polarizable dyes | We studied angle-dependent reflectivity spectra of opal photonic crystals infiltrated with cyanine dye aggregates, which are highly polarizable media with very large Rabi frequency. We show that, at resonance condition between the exciton-polariton of the dye aggregate and the Bragg gap, the Bragg s... | Braggoriton excitations; Opal photonic crystals; Cyanine dye aggregates; Bragg; Photonic band-gap; PBG; Polarizable dyes | 2002 |
| 49 |
 |
Vardeny, Zeev Valentine; Raikh, Mikhail E. | Excitations in opal photonic crystals infiltrated with polarizable media | Photonic crystals (PC) are a class of artificial structures with a periodic dielectric function. PCs can be a laboratory for testing fundamental processes involving interactions of radiation with matter in novel conditions. We have studied the optical properties of opal PCs that are infiltrated with... | Opal photonic crystals; Polarizable media; Bragg gap; Polaritonic gap; Photonic stop band | 2002 |
| 50 |
 |
Lupton, John Mark | Exciton confinement in organic dendrimer quantum wells for opto-electronic applications | Organic dendrimers are a fascinating new class of materials for opto-electronic applications. We present coupled electronic oscillator calculations on novel nanoscale conjugated dendrimers for use in organic light-emitting diodes. Strong confinement of excitations at the center of the dendrimers is ... | Exciton confinement; Opto-electronic applications; Coupled electronic oscillator | 2002 |