Filters: Collection: "ir_uspace" Date: "1998"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 76 |
 |
Hibler, Michael J. | The flask security architecture: system support for diverse security policies | Operating systems must be flexible in their support for security policies, i.e., the operating system must provide sufficient mechanisms for supporting the wide variety of real-world security policies. Systems claiming to provide this support have failed to do so in two ways: they either fail to pro... | Flask; Security architecture | 1998 |
| 77 |
 |
Vardeny, Zeev Valentine | Double-modulation electro-optic sampling for pump-and-probe ultrafast correlation measurements | We describe a novel electro-optic double-modulation (DM) sampling technique for ultrafast transient spectroscopy, which is characterized by a superior signal-to-noise ratio compared to that of a regular single-modulation technique. DM is achieved by a combined effect of a radio-frequency modulation,... | Double-modulation; Electro-optic sampling; Ultrafast transient spectroscopy; Pump; Probe | 1998 |
| 78 |
 |
Myers, Chris J. | Covering conditions and algorithms for the synthesis of speed-independent circuits | Abstract-This paper presents theory and algorithms for the synthesis of standard C-implementations of speed-independent circuits. These implementations are block-level circuits which may consist of atomic gates to perform complex functions in order to ensure hazard freedom. First, we present Boolean... | 1998 | |
| 79 |
 |
Couldwell, William T. | Transfacet pedicle-sparing approach for thoracic disc removal: cadaveric morphometric analysis and preliminary clinical experience | A number of operative techniques have been described for the treatment of herniated thoracic discs. The transfacet pedicle-sparing approach allows for complete disc removal with limited spinal column disruption and soft-tissue dissection. Fifteen cadaveric spinal columns were used for evaluation of... | Thoracic spine; Herniated thoracic discs; Intervertebral disc herniation; Discectomy; Pedicle; Radiculopathy; Myelopathy | 1998 |
| 80 |
 |
Weinstein, David | The analytic 3-D transform for the least-squared fit of three pairs of corresponding points | We derive the analytic transformation for minimizing the summed-squared-distance between three movable points in one three-space pose to three corresponding fixed points in another three-space pose. This change of basis is a general rigid-body transformation (translation and rotation), with the addi... | 3-D transform; summed-squared-distance; three movable points; Three-space | 1998 |
| 81 |
 |
Ogburn, Joyce L. | Acquiring minds want to know: information policies and intellectual property | As librarians, vendors, and publishers, we deal with information every day, and we have developed policies to govern the acquisition and use of this information. Information policies on campuses have tended to focus on computing issues and information technology. Information policies give a lot of a... | Information policies; Information access; Computing; Free speech; Academic freedom | 1998 |
| 82 |
 |
Sikorski, Kris | An interior ellipsoid algorithm for fixed points | We consider the problem of approximating fixed points of non-smooth contractive functions with using of the absolute error criterion. In [12] we proved that the upper bound on the number of function evaluations to compute ?-approximations is 0(n3(In 1/? + In 1/1-q +In n)) in the worst case, where ... | Ellipsoid algorithm; Contractive functions; Fixed points | 1998 |
| 83 |
 |
Morse, Michael David | A pair potentials study of matrix-isolated atomic zinc. II. Intersystem crossing in rare-gas clusters and matrices | The mechanism of 4p 1P1?4p 3PJ intersystem crossing (ISC) following excitation of the 4p 1P1 level of matrix-isolated atomic zinc is investigated using a pair potentials approach. This is achieved by extending earlier ISC calculations on the Zn?RG2 and Zn?RG3 complexes to the square planar Zn?RG4 ... | 1998 | |
| 84 |
 |
Armentrout, Peter B. | Guided ion beam studies of the reactions of Crn + (n=2-18) with O2: chromium cluster oxide and dioxide bond energies | The kinetic energy dependence of the reactions of Crn+ (n=2-18) with O2 are studied in a guided ion beam mass spectrometer. A variety of CrmO2+, CrmO+, and Crm+ product ions, where m≤n, are observed, with the dioxide cluster ions dominating the products for all larger reactant cluster ions. React... | Metal clusters; Chromium ions; Oxygen; Oxygen; Bond energies; Exothermic reactions | 1998 |
| 85 |
 |
Miller, Joel Steven | Isolation and structural determination of octacyanobutanediide, [C4(CN)8]2-; precursors to M(TCNE)x magnets(**) | The reaction of MI2.xMe3CN (M = Mn, Fe) and TCNE (tetracyanoethylene) leads to unprecedented [C4(CN)8]2-U4-metal complexes which have been crystallographically characterized and are precursors to M(TCNE)x-yS magnets. | Absorptions; Magnets; Bond | 1998 |
| 86 |
 |
Zick, Cathleen D. | Review of the economics of family time use | Time is a limited resource. Yet, it is also the one resource with which all individuals are equally endowed on any given day. Why then is there such wide variation in how each of us chooses to use that time? What factors guide our decisions about time spent working versus time spent with family and... | 1998 | |
| 87 |
 |
Kowaleski-Jones, Lori | Sex, contraception and childbearing among high-risk youth: do different factors influence males and females? | During adolescence, many young people begin to experiment with new roles. One important area of exploration is sexual activity, which involves a certain amount of risk-taking. | 1998 | |
| 88 |
 |
Christensen, Douglas A. | Plasma-etched polymer waveguides for intrachip optical interconnects | Optical intrachip communication offers the potential advantages of high speed and lack of electrical interference. We report on progress made on an interconnect design using GaAs LEDs, polymer waveguides, and photodiodes in a silicon substrate. The polymer waveguides are fabricated in polyimide or p... | Polymer waveguides; Intrachip interconnects; LEDs | 1998 |
| 89 |
 |
Vardeny, Zeev Valentine; Gellermann, Werner | Amplified resonant Raman scattering in conducting polymer thin films | Using picosecond pulsed laser excitation, we investigate the optical emission characteristics of poly(2,5-dioctyloxy-p-phenylenevinylene), (DOO-PPV), thin films at high excitation intensities (~1-90 MW/cm2). We observe the presence of amplified resonance Raman scattering in the emission spectra of c... | Amplified resonant Raman scattering; High excitation intensities; pi-conjugated polymers | 1998 |
| 90 |
 |
Nelson, Donald | Constraint Jacobians for constant-time inverse kinematics and assembly optimization | An algorithm for the constant-time solution of systems of geometric constraint equations is presented in this work. constraint equations and their Jacobians may be used in conjunction with other numerical methods to solve for a variety of kinematics, dynamics, and assembly optimization problems. The... | Constant-time; Inverse kinematics; Constraint Jacobians | 1998 |
| 91 |
 |
Mathews, V. John | Adaptive parallel-cascade truncated volterra filters | Abstract-This paper studies adaptive truncated Volterra filters employing parallel-cascade structures. Parallel-cascade realizations implement higher order Volterra systems a s a parallel connection of multiplicative combinations of lower order truncated Volterra systems. A normalized LMS adaptive f... | 1998 | |
| 92 |
 |
Gesteland, Raymond F.; Atkins, John F.; Ingram, Jennifer A.; Kelly, Paul J.; Grentzmann, Guido | Dual-luciferase reporter system for studying recoding signals | A new reporter system has been developed for measuring translation coupling efficiency of recoding mechanisms such as frameshifting or readthrough. A recoding test sequence is cloned in between the renilla and firefly luciferase reporter genes and the two luciferase activities are subsequently measu... | Amino Acid Sequence; Genes, Reporter; HIV; Antizyme; Translation | 1998 |
| 93 |
 |
Sokolsky, Pierre | Highest-energy cosmic rays | What in the cosmos can possibly be accelerating protons to 1020 electron volts and beyond? And how can they preserve such extreme energies while plowing through the cosmic microwave background on their way to us? | Energy spectrum; GZK cutoff; Atmospheric fluorescence | 1998 |
| 94 |
 |
Miller, Joel Steven; Epstein, Arthur J.; Zhang, Jie | Reentrance in the Mn(tetracyanoethylene)x.y(CH2Cl2) high-Tc molecule-based ferrimagnet | Results of static and dynamic magnetic studies of the compound Mn(TCNE)x•y(CH2Cl2) (TCNE =tetracyanoethylene) are reported. Curie-Weiss analysis of the high-temperature susceptibility data indicates a relatively strong exchange. The ac susceptibility, measured as a function of frequency and tempe... | Transition; Reentrant; Magnetic | 1998 |
| 95 |
 |
Golden, Kenneth M. | Inverse electromagnetic scattering models for sea ice | Inverse scattering algorithms for reconstructing the physical properties of sea ice from scattered electromagnetic field data are presented. The development of these algorithms has advanced the theory of remote sensing, particularly in the microwave region, and has the potential to form the basis f... | Polar ice; Electromagnetic scattering; Electromagnetic scattering inverse problems; Multilayer random media; Dielectric materials; Nonhomogeneous media; Remote sensing | 1998 |
| 96 |
 |
Ogburn, Joyce L. | Acquiring minds want to know: CAUSE | This year I went to CAUSE in Orlando FL, December 3-5, for the first time to see how it differed from EDUCOM (at the CAUSE meeting the two organizations voted to merge next year). The content seemed similar and some of the same attendees and vendors were there. Typical topics covered campus informat... | Education; Technology; CAUSE; Libraries | 1998 |
| 97 |
 |
Ameel, Timothy A | Microchannel fluid behavior using micropolar fluid theory | In this paper, we describe microchannel fluid behavior using a numerical model based on micropolar fluid theory and experimentally verify the model using micromachined channels. The micropolar fluid theory augments the laws of classical continuum mechanics by incorporating the effects of fluid ... | 1998 | |
| 98 |
 |
Myers, Chris J.; Stevens, Kenneth | Average-case optimized technology mapping of one-hot domino circuits* | This paper presents a technology mapping technique for optimizing the average-case delay of asynchronous combinational circuits implemented using domino logic and one-hot encoded outputs. The technique minimizes the critical path for common input patterns at the possible expense of making less commo... | 1998 | |
| 99 |
 |
Ogburn, Joyce L. | Acquiring minds want to know: ownership of intellectual property in the academic environment | This article is the third in a series dealing with intellectual property, technology, and information policies. It specifically addresses ownership of intellectual property in the academic environment, focusing on course materials, but providing commentary on other intellectual property. | Intellectual property; Rights; Academia | 1998 |
| 100 |
 |
Davidson, Diane W. | Effects of trenching on growth and survival of planted Shorea parvifolia seedlings under pioneer stands in a logged-over forest | Effects of trenching on growth and survival of planted Shorea parvifolia seedlings under pioneer stands in a logged-over forest. We conducted an experiment to determine the value of trenching in reducing potentially negative effects of root competition on growth of Shorea parvifolia seedlings plant... | Shorea parvifolia; Trenching; Dipterocarp seedlings; Enrichment planting; Pioneer stands; Root competition; Soil compaction; Sabah | 1998 |