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Articles 151 - 180 of 2919
Full-Text Articles in Physical Sciences and Mathematics
Colombia: The Political Psychology Of Fusarium Oxysporum, Ibpp Editor
Colombia: The Political Psychology Of Fusarium Oxysporum, Ibpp Editor
International Bulletin of Political Psychology
This article presents a brief outline of caveats associated with the employment of fusarium oxysporum to eradicate coca and opium poppy production. These caveats are based on an analysis developed by Dr. Archie Dickey, an environmental biologist at Embry-Riddle Aeronautical University, Prescott, Arizona, USA.
Evaluation Of The Macrocyclic Glycopeptide A-40,926 As A High-Performance Liquid Chromatographic Chiral Selector And Comparison With Teicoplanin Chiral Stationary Phase, Alain Berthod, Timothy Yu, John P. Kullman, Daniel W. Armstrong, Francesco Gasparrini, Ilaria D'Acquarica, Domenico Misiti, Angelo Carotti
Evaluation Of The Macrocyclic Glycopeptide A-40,926 As A High-Performance Liquid Chromatographic Chiral Selector And Comparison With Teicoplanin Chiral Stationary Phase, Alain Berthod, Timothy Yu, John P. Kullman, Daniel W. Armstrong, Francesco Gasparrini, Ilaria D'Acquarica, Domenico Misiti, Angelo Carotti
Chemistry Faculty Research & Creative Works
A new macrocyclic antibiotic of the vancomycin family, referred to by its industrial designation as A-40,926, was bonded to 5 μm silica particles and utilized as a chiral stationary phase (CSP). Since A-40,926 is structurally related to teicoplanin, the A-40,926 CSP was compared to a commercially available teicoplanin CSP. A set of 28 chiral compounds, including amino-acids and related compounds, compounds with a ring containing the stereogenic centre, compounds bearing aromatic structures near their stereogenic centres and alcohols, was tested for enantioseparation on the two CSPs. The results are compared and discussed in terms of enantioselective Gibbs energy difference. The …
Enantioselective Reversed-Phase And Non-Aqueous Capillary Electrochromatography Using A Teicoplanin Chiral Stationary Phase, Charlotte Karlsson, Håkan Wikström, Daniel W. Armstrong, Paul K. Owens
Enantioselective Reversed-Phase And Non-Aqueous Capillary Electrochromatography Using A Teicoplanin Chiral Stationary Phase, Charlotte Karlsson, Håkan Wikström, Daniel W. Armstrong, Paul K. Owens
Chemistry Faculty Research & Creative Works
Enantiomeric separation of chiral pharmaceuticals is carried out in aqueous and non-aqueous packed capillary electrochromatography (CEC) using a teicoplanin chiral stationary phase (CSP). Capillaries were slurry packed with 5 μm 100-A porous silica particles modified with teicoplanin and initially evaluated using a non-aqueous polar organic mode system suitability test for the separation of metoprolol enantiomers (R(s)=2.3 and 53 000 plates m-1). A number of pharmaceutical drugs were subsequently screened with enantioselectivity obtained for 25 racemic solutes including examples of neutral, acidic and basic molecules such as coumachlor (R(s)=3.0 and 86 000 plates m-1) and alprenolol (R(s)=3.3 and 135 000 plates …
Universal Quantum Limits On Single-Channel Information, Entropy, And Heat Flow, Miles Blencowe, Vincenzo Vitelli
Universal Quantum Limits On Single-Channel Information, Entropy, And Heat Flow, Miles Blencowe, Vincenzo Vitelli
Dartmouth Scholarship
We show that the recently discovered universal upper bound on the thermal conductance of a single channel comprising particles obeying arbitrary fractional statistics is in fact a consequence of a more general universal upper bound, involving the averaged entropy and energy currents of a single channel connecting heat reservoirs with arbitrary temperatures and chemical potentials. The latter upper bound in turn leads, via Holevo's theorem, to a universal (i.e., statistics independent) upper bound on the optimum capacity for classical information transmission down a single, wideband quantum channel.
Comparative Studies Of Dissociative Electron Attachment To Methyl Halides, R. S. Wilde, Gordon A. Gallup, Ilya I. Fabrikant
Comparative Studies Of Dissociative Electron Attachment To Methyl Halides, R. S. Wilde, Gordon A. Gallup, Ilya I. Fabrikant
Gordon Gallup Publications
The dissociative electron attachment cross sections for the methyl halides vary in an enormous range from the virtually unmeasurable 10−23 cm2 for CH3Cl at room temperature to 10−14 cm2 for CH3I. In this paper we supplement our previous studies by calculations of dissociative electron attachment to CH3Br and compare results for all methyl halides studied so far. The rate as a function of temperature for CH3Cl and CH3Br exhibits an exponential dependence on 1/T (Arrhenius law) with the activation energy lower for CH3Br. …
Sfde's As Dynamical Systems (Symposium 2000/2001, University Of Warwick), Salah-Eldin A. Mohammed
Sfde's As Dynamical Systems (Symposium 2000/2001, University Of Warwick), Salah-Eldin A. Mohammed
Miscellaneous (presentations, translations, interviews, etc)
No abstract provided.
Simulation Of Daily And Monthly Stream Discharge From Small Watersheds Using The Swat Model, Crystal A. Spruill, Stephen R. Workman, Joseph L. Taraba
Simulation Of Daily And Monthly Stream Discharge From Small Watersheds Using The Swat Model, Crystal A. Spruill, Stephen R. Workman, Joseph L. Taraba
Biosystems and Agricultural Engineering Faculty Publications
The Soil and Water Assessment Tool (SWAT) was evaluated and parameter sensitivities were determined while modeling daily streamflows in a small central Kentucky watershed over a two-year period. Streamflow data from 1996 were used to calibrate the model and streamflow data from 1995 were used for evaluation. The model adequately predicted the trends in daily streamflow during this period although Nash-Sutcliffe R2 values were –0.04 and 0.19 for 1995 and 1996, respectively. The model poorly predicted the timing of some peak flow values and recession rates during the last half of 1995. Excluding daily peak flow values from August …
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 17, Number 3, November 2000, College Of Engineering And Computer Science, Wright State University
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 17, Number 3, November 2000, College Of Engineering And Computer Science, Wright State University
BITs and PCs Newsletter
A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.
Report Of The Qcd Tools Working Group, R. K. Ellis, R. Field, S. Mrenna, Gregory R. Snow, C. Balazs, E. Boos, J. Campbell, R. Demina, J. Huston, C-Y. P. Ngan, A. Petrelli, I. Puljak, T. Sjostrand, J. Smith, D. Stuart, K. Sumorok
Report Of The Qcd Tools Working Group, R. K. Ellis, R. Field, S. Mrenna, Gregory R. Snow, C. Balazs, E. Boos, J. Campbell, R. Demina, J. Huston, C-Y. P. Ngan, A. Petrelli, I. Puljak, T. Sjostrand, J. Smith, D. Stuart, K. Sumorok
Gregory Snow Publications
We report on the activities of the “QCD Tools for heavy flavors and new physics searches” working group of the Run II Workshop on QCD and Weak Bosons. The contributions cover the topics of improved parton showering and comparisons of Monte Carlo programs and resummation calculations, recent developments in Pythia, the methodology of measuring backgrounds to new physics searches, variable flavor number schemes for heavy quark electro-production, the underlying event in hard scattering processes, and the Monte Carlo MCFM for NLO processes.
Tabletop Accelerators Are Brighter And Faster, Phil Schewe, Ben Stein, Donald P. Umstadter
Tabletop Accelerators Are Brighter And Faster, Phil Schewe, Ben Stein, Donald P. Umstadter
Donald Umstadter Publications
At last week's APS plasma physics meeting, Donald Umstadter of the University of Michigan's Center for Ultrafast Optical Science (734-764-2284, dpu@umich.edu) reported on advances at his lab and elsewhere in tabletop laser accelerators, devices that use light to accelerate beams of electrons and protons to energies of a million volts in distances of only microns. This acceleration rate or "gradient" is up to a thousand times larger than in conventional accelerators because the tabletop laser light can now exert pressures of gigabars, the highest ever achieved, and approaching the pressure of light near the Sun. Not only that, but Umstadter's …
Gis And Spatial Analysis In Urban And Regional Research, Derek Bond
Gis And Spatial Analysis In Urban And Regional Research, Derek Bond
Derek Bond
The early optimism surrounding GIS has now faded. Few GIS implementations have lived up to expectation. The most successful have been those at the operational level where their main role has been to replace paper maps with digital ones. However, as the cost of GIS implementation falls and spatial data becomes more readily available there is a need to consider the future of GIS and spatial analysis. This is particularly important in the field of urban and regional research especially where considerable investment in GIS has already been made. This paper looks at the major issues that face regional and …
Temperature-Induced Configurational Excitations For Predicting Thermodynamic And Mechanical Properties Of Alloys, Duane D. Johnson, Andrei V. Smirnov, J. B. Staunton, F. J. Pinski, W. A. Shelton
Temperature-Induced Configurational Excitations For Predicting Thermodynamic And Mechanical Properties Of Alloys, Duane D. Johnson, Andrei V. Smirnov, J. B. Staunton, F. J. Pinski, W. A. Shelton
Duane D. Johnson
We show that a structural energy difference, ΔE, must include explicit symmetry-breaking changes of the electronic structure due to temperature-induced configurational excitations, and why ΔE at T=0 K is not necessarily relevant to thermodynamic and mechanical modeling. In Ni3V, we calculate a tenfold decrease of ΔE between D022 and L12 structures from T=0 K to states of order relevant to experiment. ΔE calculated directly from states with short-range order (8 meV) or with low partial order (7–12 meV) agree with high-T experiment (10 meV).
Tackling The Iso 14000 Maze: Which Firms Adopt And Which Do Not?, Steven A. Melnyk, Robert Sroufe, Frank L. Montabon, Roger Calantone
Tackling The Iso 14000 Maze: Which Firms Adopt And Which Do Not?, Steven A. Melnyk, Robert Sroufe, Frank L. Montabon, Roger Calantone
Frank L. Montabon
ISO 14000 constitutes a major dilemma for most American firms in that they are not sure whether or not to actively pursue this new form of certification. This new standard is attractive as it holds the promise of helping firms become more efficient via better management of waste, yet this new standard deals with environmental performance, a potentially dangerous legal area. Both benefits and cost liabilities are very difficult to quantify and forecast. This leads to great uncertainty as to whether the benefits offered by improving environmental performance are sufficient to outweigh the costs incurred in obtaining certification. This study …
Environmentally Responsible Manufacturing: Assessing The Current State In American Industry, Steven A. Melnyk, Robert Sroufe, Frank L. Montabon, Roger Calantone
Environmentally Responsible Manufacturing: Assessing The Current State In American Industry, Steven A. Melnyk, Robert Sroufe, Frank L. Montabon, Roger Calantone
Frank L. Montabon
To some managers Environmentally Responsible Manufacturing (ERM) can be seen as an opportunity to better understand processes and reduce waste. To others, ERM is an unwarranted intrusion into their functional responsibilities. This paper explores the reasons for these two very different views of ERM. The paper begins by defining the concepts of ERM and Environmental Management Systems (EMS) and identifying the reasons for the increasing importance now associated with each of these concepts. Drawing on the results of a large-scale survey of American managers, a summary of current practices associated with EMS at the plant level is given. Additionally, analysis …
6. Ichitaro Uematsu, Otto Vogl, Teiji Tsuruta, Yoshiko Uematsu
6. Ichitaro Uematsu, Otto Vogl, Teiji Tsuruta, Yoshiko Uematsu
Otto Vogl
No abstract provided.
Geosciences Newsletter - 2000, Department Of Geosciences
Geosciences Newsletter - 2000, Department Of Geosciences
Geological and Environmental Sciences News
Vol.1, No. 25
- Greetings All
- Faculty News
- Groundwater Education in Michigan News
- Graduate Student News
- Alumni News
- Advisory Council News
A Survey Of Context-Aware Mobile Computing Research, Guanling Chen, David Kotz
A Survey Of Context-Aware Mobile Computing Research, Guanling Chen, David Kotz
Computer Science Technical Reports
Context-aware computing is a mobile computing paradigm in which applications can discover and take advantage of contextual information (such as user location, time of day, nearby people and devices, and user activity). Since it was proposed about a decade ago, many researchers have studied this topic and built several context-aware applications to demonstrate the usefulness of this new technology. Context-aware applications (or the system infrastructure to support them), however, have never been widely available to everyday users. In this survey of research on context-aware systems and applications, we looked in depth at the types of context used and models of …
The Expected Wet Period Of Finite Dam With Exponential Inputs, Eui Yong Lee, Kimberly Kinateder
The Expected Wet Period Of Finite Dam With Exponential Inputs, Eui Yong Lee, Kimberly Kinateder
Mathematics and Statistics Faculty Publications
We use martingale methods to obtain an explicit formula for the expected wet period of the finite dam of capacity V, where the amounts of inputs are i.i.d exponential random variables and the output rate is one, when the reservoir is not empty. As a consequence, we obtain an explicit formula for the expected hitting time of either 0 or V and a new expression for the distribution of the number of overflows during the wet period, both without the use of complex analysis.
Crystallization And Preliminary X-Ray Diffraction Studies On The Dna-Binding Domain Of The Multidrug Transporter Activation Protein (Mtan) From Bacillus Subtilis, M. H. Godsey, N. N. Baranova, A. A. Neyfakh, R. G. Brennan
Crystallization And Preliminary X-Ray Diffraction Studies On The Dna-Binding Domain Of The Multidrug Transporter Activation Protein (Mtan) From Bacillus Subtilis, M. H. Godsey, N. N. Baranova, A. A. Neyfakh, R. G. Brennan
CUP Faculty Research
The N-terminal DNA-binding domain of the multidrug transporter activation protein (MtaN) was crystallized by the hanging-drop vapour-diffusion method using lithium chloride as a precipitant. The crystals are orthorhombic and belong to the space group I212121, with unit-cell parameters a = 49.4, b = 67.8, c = 115.0 Å. Diffraction data have been collected at 100 K to 2.75 Å resolution at a synchrotron-radiation source.
Traffic Conditioner Design For Assured Forwarding In Differentiated Services Network, Ahsan Habib, Sonja Fahmy, Bharat Bhargava
Traffic Conditioner Design For Assured Forwarding In Differentiated Services Network, Ahsan Habib, Sonja Fahmy, Bharat Bhargava
Department of Computer Science Technical Reports
No abstract provided.
Performance Enhancement By Memory Reduction, Yonghong Song, Rong Xu, Cheng Wang, Zhiyuan Li
Performance Enhancement By Memory Reduction, Yonghong Song, Rong Xu, Cheng Wang, Zhiyuan Li
Department of Computer Science Technical Reports
No abstract provided.
Gasturbnlab Simulation Of Instability In A Gas Turbine, A. C. Catlin, S. Fleeter, Elias N. Houstis, John R. Rice, C. Zhou
Gasturbnlab Simulation Of Instability In A Gas Turbine, A. C. Catlin, S. Fleeter, Elias N. Houstis, John R. Rice, C. Zhou
Department of Computer Science Technical Reports
No abstract provided.
The Computational Complexity Of N-K Fitness Functions, Alden H. Wright, Richard K. Thompson, Jian Zhang
The Computational Complexity Of N-K Fitness Functions, Alden H. Wright, Richard K. Thompson, Jian Zhang
Computer Science Faculty Publications
N-K fitness landscapes have been widely used as examples and test functions in the field of evolutionary computation. Thus, the computational complexity of these landscapes as optimization problems is of interest. We investigate the computational complexity of the problem of optimizing the N-K fitness functions and related fitness functions. We give an algorithm to optimize adjacent-model N-K fitness functions which is polynomial in N. We show that the decision problem corresponding to optimizing random-model N-K fitness functions is NP-complete for K > 1 and is polynomial for K = 1. If the restriction that the ith component function depends …
Andros Island Flora And Fauna In The New Millennium, Jose V. Lopez, Cheryl L. Peterson, Felix Morales, Luther Brown
Andros Island Flora And Fauna In The New Millennium, Jose V. Lopez, Cheryl L. Peterson, Felix Morales, Luther Brown
Marine & Environmental Sciences Faculty Articles
No abstract provided.
Transport Anomalies And Marginal Fermi-Liquid Effects At A Quantum Critical Point, Dietrich Belitz, Theodore R. Kirkpatrick, Rajesh S. Narayanan, Thomas Vojta
Transport Anomalies And Marginal Fermi-Liquid Effects At A Quantum Critical Point, Dietrich Belitz, Theodore R. Kirkpatrick, Rajesh S. Narayanan, Thomas Vojta
Physics Faculty Research & Creative Works
The conductivity and the tunneling density of states of disordered itinerant electrons in the vicinity of a ferromagnetic transition at low temperature are discussed. Critical fluctuations lead to nonanalytic frequency and temperature dependencies that are distinct from the usual long-time tail effects in a disordered Fermi liquid. The crossover between these two types of behavior is proposed as an experimental check of recent theories of the quantum ferromagnetic critical behavior. In addition, the quasiparticle properties at criticality are shown to be those of a marginal Fermi liquid.
Binary Condensation In A Supersonic Nozzle, Barbara Ellen Wyslouzil, Christopher H. Heath, Janice L. Cheung, Gerald Wilemski
Binary Condensation In A Supersonic Nozzle, Barbara Ellen Wyslouzil, Christopher H. Heath, Janice L. Cheung, Gerald Wilemski
Physics Faculty Research & Creative Works
We present data from the first systematic studies of binary condensation in supersonic nozzles. The apparatus used to conduct the experiments is described in detail, and the important issues of stability and reproducibility of the experiments are discussed. Experiments were conducted with water, ethanol, propanol, and binary mixtures of these compounds. Onset was determined in the temperature range of 190-215 K, and for each mixture composition the pressures of the condensible species at an onset temperature of 207 K were determined. For the ideal ethanol-propanol mixtures, the onset pressures at constant temperature vary almost linearly between those of the pure …
Modeling Distinct Vertical Biogeochemical Structure Of The Black Sea: Dynamical Coupling Of The Oxic, Suboxic, And Anoxic Layers, T Oguz, Hw Ducklow, P Malanotte-Rizzoli
Modeling Distinct Vertical Biogeochemical Structure Of The Black Sea: Dynamical Coupling Of The Oxic, Suboxic, And Anoxic Layers, T Oguz, Hw Ducklow, P Malanotte-Rizzoli
VIMS Articles
A one-dimensional, vertically resolved, physical-biogeochemical model is used to provide a unified representation of the dynamically coupled oxic-suboxic-anoxic system for the interior Black Sea. The model relates the annual cycle of plankton production in the form of a series of successive phytoplankton, mesozooplankton, and higher consumer blooms to organic matter generation and to the remineralization-ammonification-nitrification-dentrification chain of the nitrogen cycle as well as to anaerobic sulfide oxidation in the suboxic-anoxic interface zone. The simulations indicate that oxygen consumption during remineralixation and nitrification, together with a lack of ventilation of subsurface waters due to the presence of strong stratification, are the …
Book Review: 3-D Atlas Of Stars And Galaxies, T. D. Oswalt
Book Review: 3-D Atlas Of Stars And Galaxies, T. D. Oswalt
Publications
This document is Dr. Oswalt’s review of 3-D Atlas of Stars and Galaxies by Richard Monkhouse and John Cox Springer, 2000. 95p, 1-85233-189-5 $42.00.
Holography, A Covariant C Function, And The Geometry Of The Renormalization Group, Vatche Sahakian
Holography, A Covariant C Function, And The Geometry Of The Renormalization Group, Vatche Sahakian
All HMC Faculty Publications and Research
We propose a covariant geometrical expression for the c function for theories which admit dual gravitational descriptions. We state a c theorem with respect to this quantity and prove it. We apply the expression to a class of geometries, from domain walls in gauged supergravities, to extremal and near extremal Dp-branes, and the AdS Schwarzschild black hole. In all cases, we find agreement with expectations.
Web Schemas In Whoweda, Sourav S. Bhowmick, Wee Keong Ng, Sanjay Kumar Madria
Web Schemas In Whoweda, Sourav S. Bhowmick, Wee Keong Ng, Sanjay Kumar Madria
Computer Science Faculty Research & Creative Works
The term schema denotes whatever way a data model chooses to model its data. In this paper we discuss schemas of a set of HTML or XML documents retrieved from the Web in the context of our web warehousing system called WHOWEDA (Warehouse of Web Data). Web schemas are used to bind a web table that contains a collection of interlinked web documents called web tuples. These schemas specify some of the metadata, content and structural properties (in the form of predicates) shared by some of the Web documents and hyperlinks in the web table. They also summarize the hyperlink …