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CreatorTitleDescriptionSubjectDate
151Ehleringer, James R.Water and nitrogen uptake patterns following moisture pulses in a cold desert communityVariation in the ability to utilize pulses of both water and nitrogen (N) is one possible mechanism allowing the coexistence of species in the cold desert community on the Colorado Plateau. We simulated 25-mm precipitation events and used stable isotope tracers (2H and 15N) to follow water and N upt...Colorado Plateau; Desert perennials; Nitrogen uptake patterns; Pulse utilization; Resource partitioning; Stable isotopes; Water uptake patterns2000
152Mallat, ChibliCommercial Law in the Middle East: Between Classical Transactions and Modern BusinessA brief presentation of commercial law decisions across the Arab world is sufficient to show the dominance of western principles in the field, and the direct translation of western terminology and rules for local transactions.2 The decisions have been regrouped in categories which will be familiar t...2000-01
153Liu, FengCreation of "quantum platelets" via strain-controlled self-organization at stepsWe demonstrate, by both theory and experiment, the strain-induced self-organized formation of "quantum platelets," monolayer-thick islands of finite dimensions. They form at the early stage of heteroepitaxial growth on a substrate with regularly spaced steps, and align along the steps. In the direc...Quantum platelets; Strain-controlled self-organization; Monolayer-thick islands; Heteroepitaxial growth2000-12
154DeTar, CarletonCritical behavior in Nt=4 staggered fermion thermodynamicsQuantum chromodynamics with two zero mass flavors is expected to exhibit a phase transition with O(4) critical behavior. Fixing the universality class is important for phenomenology and for facilitating the extrapolation of simulation data to physical quark mass values. Other groups have reported r...Staggered fermions; Phase transitions; Quark-gluon plasma; Chiral symmetry2000-01
155DeTar, CarletonCritical behavior in Nt=4 staggered fermion thermodynamicsQuantum chromodynamics with two zero mass flavors is expected to exhibit a phase transition with O(4) critical behavior. Fixing the universality class is important for phenomenology and for facilitating the extrapolation of simulation data to physical quark mass values. Other groups have reported r...Staggered fermions; Phase transitions2000-01
156Brillinger, AnneDiet; If you go "On" a diet, you're bound to go "OffIf you go "ON" a diet, you're bound to go "OF". Diet is a four-letter word. Just ask the millions of frustrated overweight Americans who've struggled to stay on one. Making fairly simple lifestyle changes can improve how you feelDiet; Bioelectrical Impedance Analysis; Body Mass Index; Food Guide Pyramid2000-03
157Olson, Randall J.; Samore, Matthew H.; Pace, Nathan L.Dysphotopsia in phakic and pseudophakic patients: incidence and relation to intraocular lens type(2)PURPOSE: To determine the relationship between various intraocular lens (IOL) types and the incidence of unwanted light images. SETTING: The Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. METHODS: A telephone questionnaire was administered to 302 postoperative patients who had rece...Cataract Extraction; Visual Acuity; Lenses, Intraocular; Lens Implantation, Intraocular2000-06
158Vardeny, Zeev Valentine; Raikh, Mikhail E.Emission spectrum of a dipole in a semi-infinite periodic dielectric structure: effect of the boundaryThe emission spectrum of a dipole embedded in a semi-infinite photonic crystal is calculated. For simplicity we study the case in which the dielectric function is sinusoidally modulated only along the direction perpendicular to the boundary surface plane. In addition to oscillations of the emission...Emission spectrum; Dipole; Periodic dielectric structure2000-07
159Sokolsky, PierreEnergy estimation of UHE cosmic rays using the atmospheric fluorescence techniqueWe use the CORSIKA air shower simulation program to review the method for assigning energies to ultra-high energy (UHE) cosmic rays viewed with the air fluorescence technique. This technique uses the atmosphere as a calorimeter, and we determine the corrections that must be made to the calorimetric ...Fluorescence; Energy estimation; Ultra-high energy cosmic rays2000-08
160Liu, FengEquilibrium shape of two-dimensional islands under stressWe show that the equilibrium shape anisotropy of two-dimensional islands in heteroepitaxial growth depends on island size, a consequence of the presence of strain. Even in homoepitaxy, in which the island shape has conventionally been equated with the ratio of step energies, a substrate surface str...Two-dimensional islands; Equilibrium shape; Heteroepitaxial growth; Homoepitaxy2000-08
161Landesman, Bruce M.Ethical Marxism and its radical critics (book review)Reviews the book `Ethical Marxism and Its Radical Critics,' by Lawrence Wilde.Books; Marxism; Philosophy2000-01
162Sokolsky, PierreEvidence for changing of cosmic ray composition between 10^17 and 10^18 eV from multicomponent measurementsThe average mass composition of cosmic rays with primary energies between 1017 and 1018 eV has been studied using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the MIA muon array. Measurements have been made of the change in the depth of shower maximum and the...Extensive air showers; Fluorescence; Energy spectrum; Muon density; Cherenkov light2000-05
163Vardeny, Zeev ValentineFilm morphology and photophysics of polyfluoreneWe have studied the interplay between photophysics and film morphology of poly(9,9-dioctyl)fluorene (PFO) using a variety of optical probes. Upon slowly warming a spin-cast PFO film from 80 to 300 K, a fraction of the sample is transformed into a different solid phase, the ß phase. Absorption and e...Polyfluorene; Photophysics; Film morphology2000-12
164DeTar, CarletonFirst signs for string breaking in two-flavor QCDWe have been examining the phenomenon of string breaking in QCD with two flavors of dynamical staggered quarks. We construct a transfer matrix from a combination of "string" and "two-meson" channels. Preliminary results with low statistics show the expected signs of string breaking.String breaking; Wilson loop; Staggered quarks2000-04
165Liu, FengFirst-principles study of impurity segregation in edge dislocations in SiUsing ab initio calculations, the segregation of As, Ga, and Ge atoms in the core regions of perfect edge dislocations in Si is examined. When all nearest neighbors of an impurity are Si atoms, As favors the core site at maximum compression and has a segregation energy of 0.25 eV/atom. Ga and Ge im...First-principles; Impurity segregation; Edge dislocations2000-01
166Nelson, ChristopherFoods factor in new medicationsUnderstanding how nutrients in food affect cell communication could hold the key to a new generation of medications to treat diesase. Research designed to explain nutrition at the molecular level is not a new concept, but there is still much that is not understood. If we can figure out which bioacti...Cell Signaling; Food Factors; Medications; Nutrition2000-03
167Chachas, MaryFunction or fun?What motivates us to 'Get Movin' depends on age. Regular physical activity greatly reduces the risk of dying from coronary heart disease, the leading cause of death in the United States. Physical activity also reduces the risk of developing diabetes, hypertension, and colon cancer, enhances mental h...Motion; Physical Activity; Exercise2000-03
168Nelson, ChristopherGender makes a differenceGender makes a difference when it comes to diet. Diet is much more individualized than originally thought. Men tend to lose weight more easily than women because they have more lean tissue, which is metabolically active. However some of the most important determinants of success or failure may turn ...Diet; Gender2000-03
169DeTar, CarletonHeavy-light decay constants with dynamical gauge configurations and Wilson or improved valence quark actionsWe describe a calculation of heavy-light decay constants including virtual quark loop effects. We have generated dynamical gauge configurations at three _x000C_ values using two flavors of Kogut-Susskind quarks with a range of masses. These are analyzed with a Wilson valence quark action. Prelimin...Decay constants; Kogut-Susskind quarks; Wilson quarks; Fat-clover valence quarks2000-04
170Sample, SusanHigh impactFrom 1993-97, Gilbert contributed to seven articles published in top peer-reviewed journals, which were then cited 1,157 times, or an average of 165.3 times per paper. When Gilbert heard the news, "it kind of blew me away." He acknowledged that the articles, clinical trials of new drugs to treat chr...Chronic Heart Failure; ACE Inhibitors; Beta -Blockers2000-03
171Wu, Yong-ShiHolography and noncommutative Yang-Mills theoryIn this Letter a recently proposed gravity dual of noncommutative Yang-Mills theory is derived from the relations between closed string moduli and open string moduli recently suggested by Seiberg and Witten. The only new input one needs is a simple form of the running string tension as a function ...Noncommutativity; String theory; Gravity dual2000-03
172Dwan, JohnIgnored medical problemA physician who doesn't recommend that a patient stop smoking is hard to find. Few, however, try to help patients lose weight, even though a recent National Institutes of Health (NIH) study showed that at least 300,000 deaths each year can be attributed to being overweight, obese or severely overwei...Diet; Life Style; Therapeutic Aspects; Science of nutrition2000-03
173Vardeny, Zeev ValentineLasing and stimulated emission in ∏-conjugated polymersRecent studies of lasing and stimulated emission in luminescent -conjugated polymers performed by our group are presented. Optical properties of cylindrical high- polymer microcavities are discussed. The emission spectra of plastic microring and microdisk lasers are measured and analyzed. Light-emi...Lasing; Stimulated emission; pi-conjugated polymers; Microcavities; Polymer lasers2000-01
174Liu, FengMagnetization on rough ferromagnetic surfacesUsing Ising-model Monte Carlo simulations, we show a strong dependence of surface magnetization on surface roughness. On ferromagnetic surfaces with spin-exchange coupling larger than that of the bulk, the surface magnetic ordering temperature decreases toward the bulk Curie temperature with incre...Ferromagnetic surfaces; Surface magnetization2000-11
175Dwan, JohnMaybe your genes made you eat itAnother snack? The queston is: why do people eat? Is it anxiety, habbit, immediate gratification? Or, do your genes make you do it? Could there be a genetic predisposition to obesity , a genetic defect that makes some people hungrier more often than others? If a genetic link is found and a drug can ...Genetic Factors; Diet; Predisposion to Obesity2000-03
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