Physical Sciences and Mathematics Commons^™

ความหมายของการพัฒนาอย่างยั่งยืนภายใต้แนวคิดการพัฒนาประเทศ, สุรินทร์ เศรษฐมานิต

Thai Environment

No abstract provided.

กรณีสารสีส้มและฝนเหลืองที่บ่อฝ้าย : ในทัศนะของนักวิชาการด้านสิ่งแวดล้อม, ทวีศักดิ์ ปิยะกาญน์

Thai Environment

No abstract provided.

แผนปฏิบัติการประชาสัมพันธ์และประมาณค่าใช้จ่ายด้านการจัดการสิ่งแวดล้อมของโครงการ, เสถียร รุจิรวนิช

Thai Environment

No abstract provided.

ขยะ "ของร้อน" บนเส้นทางขนานของการพัฒนาเมือง, ธีรพล คังคะเกตุ

Thai Environment

No abstract provided.

แนะนำโครงการของสถาบันวิจัยสภาวะแวดล้อม : การเผยแพร่โปรแกรมจัดการสารเคมี (Chemtrack) สู่มหาวิทยาลัย, วรรณี พฤฒิถาวร

Thai Environment

No abstract provided.

What Is Y2k And How Did The University Of Nevada System Solve It?, Diane R. Dietrich

UNLV Theses, Dissertations, Professional Papers, and Capstones

The turn of the century change from 1999 to 2000 will create chaos for the world's computer systems. This paper will discuss the causes of the Y2K problem, the reaction to this problem by the University of Nevada System Computer Services and possible repercussions of this problem for Nevada, the United States and the world.

Pretransitional Behavior Above The Nematic-Isotropic Phase Transition Of An Auxetic Trimer Liquid Crystal, Daeseung Kang, Milind P. Mahajan, Shiyong Zhang, Rolfe G. Petschek, Charles Rosenblatt

Faculty Scholarship

Static light scattering and electric field-induced Kerr measurements were performed above the nematic-isotropic phase transition of a terminal-lateral-lateral-terminal negative Poisson ratio trimer. For both measurements the inverse susceptibility was observed to be nearly linear with temperature, a result inconsistent with our previously reported Kerr data [Phys. Rev. E 58, 2041 (1998)].

Earth News, Fall 1999, Department Of Earth Science, University Of Northern Iowa.

Earth News

Inside this issue:

--- Earth Science Staff Activities
--- Faculty Research, Publications, and Recognition
--- Profile: Wayne Anderson
--- PRISMS Helps Physic Students "See"
--- UNI Meteorology Students "Chase" Tornadoes in Des Moines
--- Technology Takes classes, teachers into the Next Millenium
--- Gifts to the Department of Earth Science
--- Volcanology Students Study Volcanoes in Italy, Sicily and the Aeolian Islands
--- Spring Trip 2000
--- Gifts to the Department of Earth Science
--- 1999-2000 Scholarship and Award Recipients
--- Earth Science Seminar Series
--- 1999 Earth Science Graduates
--- Student Research Presentations
--- Earth Science Majors
--- Alumni …

สภาพปัญหาสิ่งแวดล้อมจากอุตสาหกรรมบริเวณพื้นที่ตำบลบางกระดี อำเภอเมือง จังหวัดปทุมธานี, ธนพรรณ สุนทระ

Thai Environment

No abstract provided.

Effect Of Interfacial Mobility On Flexural Strength And Fracture Toughness Of Glass/Epoxy Laminates, T. W. H. Wang, Frank D. Blum, Lokeswarappa R. Dharani

Chemistry Faculty Research & Creative Works

Mechanical testing and surface fractography were used to characterize the fracture of E-glass fiber reinforced epoxy composites as a function of the silane coupling agent used. gamma-Aminopropyltriethoxysilane (APS) and delta-aminobutyltriethoxysilane (ABS) were used because these have been shown to have different interfacial mobilities at multilayer coverage. The values of the properties studied generally increased from untreated c, as determined from a Mode I translaminar fracture toughness tests, for the untreated composites (10.5 ± 0.4 kJ/m2) was lower than that for the ABS-treated composites (14.3 ± 2.1 kJ/m2) which was lower than that for the APS-treated composites (17.1 ± 2.4 kJ/m2). …

Three-Dimensional Reconstructions Of Tadpole Chondrocrania From Historical Sections, Gary Radice, Mary K. Boggiano, Mark Desantis, Peter Larson, Joseph Oppong, Matthew Smetanick, Todd Stevens, James Tripp, Rebecca Weber, Michael Kerckhove, Rafael De Sá

Virginia Journal of Science

Reconstructing three dimensional structures (3DR) from histological sections has always been difficult but is becoming more accessible with the assistance of digital imaging. We sought to assemble a low cost system using readily available hardware and software to generate 3DR for a study of tadpole chondrocrania. We found that a combination of RGB can1era, stereomicro­scope, and Apple Macintosh PowerPC computers running NIH Image, Object Image, Rotater, and SURFdriver software provided acceptable reconstruc­tions. These are limited in quality primarily by the distortions arising from histological protocols rather than hardware or software.

Miscellaneous Publication 53/99 - Ideas A Diversification Manual For The Pastoral Rangelands, Kaz Price, Lee Verios

Farm Systems and Economics published reports

In 1993 the Pastoral Wool Industry Task Force recognised the diminishing returns to wool production and the need for Rangeland enterprise diversification and other risk management strategies

This manual has been developed to assist pastoralists through the decision making process when considering diversification and contains:

• business and finance planning;
• business structures;
• legislative requirements and also includes;
• current contacts for a range of industries

The manual has been produced in response to a range of questions from pastoralists wishing to investigate and develop alternate enterprises for the semi-arid Rangelands of Western Australia.

Pythia-Ii: A Knowledge Discovery In Databases System For Managing Performance Data And Recommending Scientific Software, Elias N. Houstis, Ann C. Catlin, John R. Rice, Vassilis S. Verykios, Naren Ramakrishnan

Department of Computer Science Technical Reports

No abstract provided.

Intelligent Qos Support For An Adaptive Video Service, Kyungkoo Jun, Ladislau Boloni, David K.Y. Yau, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.

An Agent-Based Workflow Management System, Krzysztof Palacz, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.

Agent-Based Resource Discovery, Kyungkoo Jun, Ladislau Bölöni, Krzysztof Palacz, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.

Evaluation Of The Enantiomeric Composition Of Amino Acids In Tobacco, John P. Kullman, Xianghong Chen, Daniel W. Armstrong

Chemistry Faculty Research & Creative Works

Despite the fact that several studies have reported the concentrations of various free amino acids in tobacco, their enantiomeric composition is unknown. Both the absolute and enantiomeric compositions of proline, alanine, asparagine, aspartic acid, valine, methionine, leucine, and phenylalanine were determined for three strains of tobacco leaf, three types of smokeless tobacco, and six different blended filtered and nonfiltered reference cigarettes. Some of the highest levels of D-amino acids ever found in agricultural products were observed. Possible mechanisms for the production of these D-amino acids are considered. The relevance of D-amino acids in tobacco is discussed.

Water Resources Review - Fall 1999 Vol 12 No 2, Annis Water Resources Institute

AWRI Reviews

No abstract provided.

Humic Substances As Interferences In The Analysis Of Nitrite In Water, Stephanie Ann Tebault

Chemistry & Biochemistry Theses & Dissertations

Humic substances are of current interest because of their roles in environmental processes involving pollutants. It is also becoming recognized that humic substances may interfere in analysis of environmental samples though the possible adverse effects do not appear to be fully appreciated. The present effort focuses on determining whether humic materials interfere in the analysis of nitrite in water using the Griess reaction. This is a well-known reaction using nitrosation to gjve a diazonium salt followed by coupling with an appropriate reagent to form a dye. This colorimetric method continues to be applied in the laboratory and the field for …

กิจกรรมสิ่งแวดล้อม

Thai Environment

No abstract provided.

A Game-Theoretic Formulation Of Multi-Agent Resource Allocation, Jonathan Bredin, Rajiv T. Maheswaran, Cagri Imer, Tamer Basar, David Kotz, Daniela Rus

Computer Science Technical Reports

This paper considers resource allocation in a network with mobile agents competing for computational priority. We formulate this problem as a multi-agent game with the players being agents purchasing service from a common server. We show that there exists a computable Nash equilibrium when agents have perfect information into the future. We simulate a network of hosts and agents using our strategy to show that our resource-allocation mechanism effectively prioritizes agents according to their endowments.

Enantioselective Synthesis Of Dual Serotonergic Azanoradamantane Sc-52491, Daniel Becker, Robert K. Husa, Alan E. Moormann, Clara I. Villamil

Chemistry: Faculty Publications and Other Works

A racemic synthesis of azanoradamantane (±)-3 was accomplished via Yamamoto's MAD-catalyzed Diels-Alder protocol. Subsequently, a scalable asymmetric synthesis of azanoradamantane benzamide SC-52491 was carried out employing Helmchen's asymmetric Diels-Alder methodology to construct all four contiguous asymmetric centers with the correct relative stereochemistry and in 99.3% e.e.

An Xps Study Of The Radiation-Induced Effect On The Thermal Degradation And Charring Of Butadiene And Its Copolymers, Jianwei Hao, Shaoli Wu, Charles Wilkie, Jianqi Wang

Chemistry Faculty Research and Publications

A pseudo-in-situ XPS approach shows that cross-linking induced by irradiation may lead to char formation even though it shows only a small or no effect on the onset temperature of degradation.

Bacterial Magnetosomes: Microbiology, Biomineralization And Biotechnological Applications, Dirk Schlϋer, Richard B. Frankel

Physics

Magnetotactic bacteria orient and migrate along geomagnetic field lines. This ability is based on intracellular magnetic structures, the magnetosomes, which comprise nanometer-sized, membrane-bound crystals of the magnetic iron minerals magnetite (Fe₃O₄) or greigite (Fe₃O₄). Magnetosome formation is achieved by a mineralization process with biological control over the accumulation of iron and the deposition of the mineral particle with specific size and orientation within a membrane vesicle at specific locations in the cell. This review focuses on the current knowledge about magnetotactic bacteria and will outline aspects of the physiology and molecular biology …

Rsd Studies In Austin, 1998, Sajal S. Pokharel, Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

Critical Behavior Of Disordered Quantum Magnets: The Relevance Of Rare Regions, Rajesh S. Narayanan, Thomas Vojta, Dietrich Belitz, Theodore R. Kirkpatrick

Physics Faculty Research & Creative Works

The effects of quenched disorder on the critical properties of itinerant quantum antiferromagnets and ferromagnets are considered. Particular attention is paid to locally ordered spatial regions that are formed in the presence of quenched disorder even when the bulk system is still in the paramagnetic phase. These rare regions or local moments are reflected in the existence of spatially inhomogeneous saddle points of the Landau-Ginzburg-Wilson functional. We derive an effective theory that takes into account small fluctuations around all of these saddle points. The resulting free energy functional contains a new term in addition to those obtained within the conventional …

Doppler Shift Anisotropy In Small Angle Neutron Scattering, Barbara Ellen Wyslouzil, Gerald Wilemski, Janice L. Cheung, Reinhard Strey, John G. Barker

Physics Faculty Research & Creative Works

The two-dimensional patterns in our small angle neutron scattering (SANS) experiments from rapidly moving aerosols are anisotropic. To test the kinematic theory of two-body scattering that describes the anisotropy, we conducted SANS experiments using a constant source of D₂O aerosol with droplets moving at ~440 m/s, and varied the neutron velocity from 267 to 800 m/s. The theoretically predicted anisotropy of the laboratory scattering intensities agrees well with the experimental results. Based on an analysis of the scattering intensity in the Guinier region, we also determined the particle velocity. The results are in very good agreement with independent …

Multiphoton Ionization Of V, Cr, Y, La, And Ir Through 0.5-Ps Ultraviolet Laser Pulses, B. Witzel, N. A. Poppadogiannis, Cornelis J. Uiterwaal, H. Schröder, D. Charalambidis

C.J.G.J. Uiterwaal Publications

The two-photon ionization of the metal atoms V, Cr, Y, La, and Ir sputtered by an Ar-ion gun from solid targets has been investigated using linearly polarized laser pulses of 500- fs duration and 248.6-nm (KrF) wavelength in combination with mass spectroscopy that is free of volume effects. A near-resonant ionization process has to be attributed to all five atoms. By fitting analytical solutions of a rate equation model describing the temporal evolution of the ionization process, we can determine absolute values of the one-photon cross sections and saturation intensities.

Sensitivity Of The North Atlantic Basin To Cyclic Climatic Forcing During The Early Cretaceous, Walter E. Dean, Michael A. Arthur

United States Geological Survey: Staff Publications

Striking cyclic interbeds of laminated dark-olive to black marlstone and bioturbated white to light-gray limestone of Neocomian (Early Cretaceous) age have been recovered at Deep Sea Drilling Project (DSDP) and Ocean Drilling Project (ODP) sites in the North Atlantic. These Neocomian sequences are equivalent to the Maiolica Formation that outcrops in the Tethyan regions of the Mediterranean and to thick limestone sequences of the Vocontian Trough of France. This lithologic unit marks the widespread deposition of biogenic carbonate over much of the North Atlantic and Tethyan seafloor during a time of overall low sealevel and a deep carbonate compensation depth. …

Measurement Of B0-B̅0 Flavor Oscillations Using Jet-Charge And Lepton Flavor Tagging In Pp̅ Collisions At √S =1.8 Tev, F. Abe, Kenneth A. Bloom, Collider Detector At Fermilab Collaboration

Kenneth Bloom Publications

We present a measurement of the mass difference Δm_d for the B⁰ meson and the statistical power of the b flavor tagging methods used. The measurement uses 90 pb^-1 of data from pp̅ collisions at √s =1.8 TeV collected with the CDF detector. An inclusive lepton trigger is used to collect a large sample of B hadron semileptonic decays. The mass difference Δm_d is determined from the proper time dependence of the fraction of B hadrons that undergo flavor oscillations. The flavor at decay is inferred from the charge of the lepton from semileptonic …