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Filters: Date: "1990" Format: "application/pdf" Collection: "ir_uspace" Type: "Text"
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26 Olivera, Baldomero M.DNA-topoisomerase modificationThe first reports of topoisomerase modification were published in 1982 and 1983 (Mills et al. 1982; Durban et al. 1983; Ferro et al. 1983; Jongstra-Bilen et al. 1983). Although a wide variety of posttranslational modifications of DNA topoisomerases may occur, this chapter focuses only on phosphoryl...Poly(ADP-ribosylation); Serine residues1990
27 Evans, JohnDPOS programming manualThis manual describes the basic concepts of the DPOS Metalanguage and the programming language DPOS Scheme.DPOS; Programming manual1990
28 Kessler, Robert R.DPOS: A metalanguage and programming environment for parallel processorsThe complexity and diversity of parallel programming languages and computer architectures hinders programmers in developing programs and greatly limits program portability. All MIMD parallel programming systems, however, address common requirements for process creation, process management, and inte...DPOS; MIMD parallel programming1990
29 Mattis, Daniel C.Dynamics of quasiparticles in the two-dimensional Hubbard modelThe Hubbard model at half-filling is a collective, antiferromagnetic insulator. We study added electrons or holes. The insulating energy gap and the dispersion of the added carriers are calculated variationally in two dimensions with use of a Monte Carlo evaluation of the electronic correlation f...Dispersion; Electrons; Carriers1990
30 Liu, FengEffect of size and dimensionality on the magnetic moment of transition metalsThe effect of size and dimensionality on the magnetic moments of Fe, Co, and Ni have been studied theoretically by confining the atoms t o various structural forms such as chains,surfaces, and thin films. The size of these systems is controlled by limiting t h e number of atoms. A new first-princip...Magnetic moment; Dimensionality; Size effects; Fe; Co; Ni1990
31 Normann, Richard A.; Chandler, John P.Effects of calcium ions on L-type horizontal cells in the isolated turtle retinaA technique by which the retina can be isolated from the turtle eye is described. Scanning electron microscopy revealed morphological variability between preparations and also between regions of the same one. Large areas were often totally free of any pigment epithelial cells, yet contained a high p...Retina; Calcium; Horizontal Cell; Turtle1990
32 Normann, Richard A.Effects of GABA and related drugs on horizontal cells in the isolated turtle retinaThe role of GABA in the outer plexiform layer of the turtle retina has been examined by intracellular recordings from L- and C-type horizontal cells in the isolated retina preparation. GABA (1-5 mM) slightly depolarized the L-type horizontal cells, reduced the amplitude of their photoresponses, and ...Retina; Horizontal Cells; Synapse; Negative Feedback; GABA; Turtle1990
33 Warner, Homer R.The Effects of ILIAD on Medical Student Problem SolvingBiomedical Informatics1990
34 Clayton, Paul D.Emerging Standards for Medical LogicBiomedical Informatics1990
35 Christensen, Douglas A.; Vincent, G. MichaelFiberoptic laser angioplasty probe with optical steerabilityWe have designed and bench tested an optically steerable fiberoptic probe for use in laser angioplasty. The unique feature of this design is the use of a gradient-index (GRIN) lens attached to the distal end of a seven-fiber bundle. By selecting which fiber of the bundle is illuminated by the source...Fiberoptic probe; GRIN lens; Steerability1990
36 Mathews, V. JohnFixed-point error analysis of stochastic gradient adaptive lattice filtersAbstract-This paper presents a theoretical analysis of the stochastic gradient adaptive lattice filter used as a linear, one-step predictor, when the effects of finite precision arithmetic are taken into account. Only the fixed-point implementation is considered here. Both the unnormalized and norma...1990
37 Miller, Jan D.; Lin, Chen-LuhFlotation recovery of high-purity gibbsite concentrates from a Brazilian bauxite oreRecently research efforts have been made to obtain a high-purity gibbsite concentrate, suitable for first-class alumina refractories, from a Brazilian bauxite ore containing gibbsite (50%), quartz (35%),and kaolinite (15%). Detailed polished-section microprobe analysis was used to describe the ...Gibbsite; Alumina1990
38 Downes, Stephen M.Herbert Simon's computational models of scientific discoveryHerbert Simon's work on scientific discovery deserves serious attention by philosophers of science for several reasons. First, Simon was an early advocate of rational scientific discovery, contra Popper and logical empiricist philosophers of science (Simon 1966). This proposal spurred on investigati...Android epistemology; Psychological processes; Cognitive individualism1990
39 Warner, Homer R.History of Medical Informatics at UtahBiomedical Informatics1990
40 Akella, VenkateshhopCP: language definition, semantics and examplesWe describe a formalism for high level modeling of hardware based on flow graphs and nonatomic actions called hopCP. A module is the description of a hardware system in hopCP, which contains a flow graph to model the behavioral aspects and ports which represent the communication links. Operations ar...hopCP1990
41 Couldwell, William T.Immunology and immunotherapy of intrinsic glial tumorsImmunological aspects of glial neoplasms have been actively investigated for the past several years with particular focus on academic, diagnostic, and therapeutic objectives. As more knowledge is acquired about the cellular events relating to tumor behavior the more it appears that the immune system...Immunology; Glial tumors1990
42 Christensen, Douglas A.; Andrade, Joseph D.Improved sensitivity in ellipsometry of thin biochemical films by employing sublayersEllipsometry is widely used for investigating the optical properties of thin films on planar substrates, including films of adsorbed proteins or polymers. The average thickness and effective refractive index of the adsorbed layer are calculated by measuring the A and ¥ ellipsometry parameters. Unfo...Biochemical films; SiO2 sublayer1990
43 Berg, Cynthia A.Individual differences in script reports: implications for language assessmentWhen individuals are asked to describe routine events, their descriptions often exhibit characteristics of script reports (Schank & Abelson, 1977). A script has been defined as a set of expectations individuals have about routine events that is organized in a temporal-causal sequence of acts or sing...Script reports; Language assessment1990
44 Couldwell, William T.Inhibition of growth of established human glioma cell lines by modulators of the protein kinase-C systemThe protein kinase-C (PKC) second messenger system contributes to regulation of cell growth and differentiation. This study was undertaken to examine the effects of modulators of the PKC enzyme system on the state of differentiation and proliferation rates of human gliomas in vitro. The administrat...Protein kinase C; Phorbol ester; Cell proliferation; Tumor cell growth; Astrocyte; Glioma; Immunohistochemistry1990
45 Couldwell, William T.Initial experience related to the use of the Cosman-Roberts-Wells stereotactic instrumentInitial experience with a new arc-radius design of stereotactic frame that interfaced with the existing components of the Brown-Roberts-Wells instrument is reported. Over a 6-month period, 32 procedures were performed on 23 males and nine female patients (mean age 32 years); these included 27 ster...Image-directed stereotaxis; Stereotactic instrument; Cosman-Roberts-Wells stereotaxy1990
46 Bruderlin, BeatInteraction with constraints in 3D modelingInteractive geometric modeling is an important part of the industrial product design process. This paper describes how constraints can be used to facilitate the interactive definition of geometric objects and assemblies. We have implemented a geometric modeling system that combines the definition o...Interactive geometric modeling; Industrial product design; Geometric constraints1990
47 Armentrout, Peter B.Kinetic energy dependence of dissociative charge-transfer reactions of He+, Ne+, Ar+, Kr+, and Xe+ with silaneGuided ion-beam techniques are used to measure the cross sections as a function of kinetic energy for reaction of SiH4 with He +, Ne +, Ar +, Kr +, and Xe +. State-specific data for the 2P3/2 ground spin-orbit states of Kr+ and Xe+ are also obtained.Silane; Charge-transfer reactions; Ion-molecule reactions; Ion energy; Rare gas ions; Plasma systems1990
48 Warner, Homer R.The Knowledge Capabilities of the Vocabulary Component of a Medical Expert SystemBiomedical Informatics1990
49 Williams, Clayton C.Lateral dopant profiling in MOS structures on a 100 nm scale using scanning capacitance microscopyScanning capacitance microscopy and atomic force microscopy have been used to image the extent of lateral dopant diffusion in MOS structures. The data are capacitance vs. voltage measurements made on a submicron scale. The technique is non-destructive when imaging uncleaved samples. New experim...Scanning capacitance microscopy; Dopant profiling1990
50 Mathews, V. JohnLattice and QR decomposition-based algorithms for recursive least squares adaptive nonlinear filtersThis paper presents a lattice structure for adaptive Volterra systems. The stucture is applicable to arbitrary planes of support of the Volterra kernels. A fast least squares lattice and a fast QR-lattice adaptive nonlinear filtering algorithms based on the lattice structure are also presented. The...1990
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