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Now showing items 3441-3460 of 3971
Orbital ordering and exchange interaction in the manganites
(American Physical Society, 2001)
The microscopic origin of the exchange interaction in manganites is studied by solving an electronic model Hamiltonian for the Mn-O-Mn triad. It is shown that the magnetic structure of La1-xCaxMnO3 is correctly described ...
Investigation of the presence of charge order in magnetite by measurement of the spin wave spectrum
(American Physical Society, 2006)
Inelastic neutron scattering results on magnetite (Fe3O4) show a large splitting in the acoustic spin wave branch, producing a 7 meV gap midway to the Brillouin zone boundary at q=(0,0,1∕2) and ℏω=43 meV. The splitting ...
Explicit Fermi coordinates and tidal dynamics in de Sitter and Gödel spacetimes
(American Physical Society, 2006)
Fermi coordinates are directly constructed in de Sitter and Gödel spacetimes and the corresponding exact coordinate transformations are given explicitly. The quasi-inertial Fermi coordinates are then employed to discuss ...
Spin gaps and spin-flip energies in density-functional theory
(American Physical Society, 2010)
Energy gaps are crucial aspects of the electronic structure of finite and extended systems. Whereas much is known about how to define and calculate charge gaps in density-functional theory (DFT), and about the relation ...
Phase transitions in hexane monolayers physisorbed onto graphite
(American Physical Society, 2005)
We report the results of molecular dynamics simulations of a complete monolayer of hexane physisorbed onto the basal plane of graphite. At low temperatures the system forms a herringbone solid. With increasing temperature, ...
Accounting for Uncertainty in Ecological Analysis: The Strengths and Limitations of Hierarchical Statistical Modeling
(Ecological Society of America, 2009)
Analyses of ecological data should account for the uncertainty in the process(es) that generated the data. However, accounting for these uncertainties is a difficult task, since
ecology is known for its complexity. ...
Beta 3 adrenergic receptor activation rescues metabolic dysfunction in female estrogen receptor alpha-null mice
(Frontiers Media S.A., 2019)
Metabolic disease risk escalates following menopause. The mechanism is not fully known, but likely involves reduced signaling through estrogen receptor alpha (ER[alpha]), which is highly expressed in brown and white adipose ...
Pedagogy Related to the Boy's Changing Voice
(1960-06)
It was the original purpose of this paper to show how the sound and common sense practices of education could be adapted to maintaining the boy's singing voice and interest in music through the period of adolescence. ...
Exchange and correlation effects on plasmon dispersions and Coulomb drag in low-density electron bilayers
(American Physical Society, 2007)
We investigate the effect of exchange and correlation (XC) on the plasmon spectrum and the Coulomb drag between spatially separated low-density two-dimensional electron layers. We adopt a different approach, which employs ...
Dynamical exchange-correlation potentials for an electron liquid
(American Physical Society, 2002)
The imaginary parts of the exchange-correlation kernels fxcL,T(ω) in the longitudinal and transverse current-current response functions of a homogeneous electron liquid are calculated exactly at low frequency, to leading ...
Observation of the superconducting proximity effect in Nb/InAs and NbNx/InAs by Raman scattering
(American Physical Society, 2002)
High-quality thin Nb and NbN films (60-100 Å) are grown on (100) n+-InAs (n=1019cm-3) substrates by dc-magnetron sputter deposition. Studies of the electronic properties of interfaces between the superconductor and the ...
Food values, personality traits, and attitudes towards genetically modified food in Norway and the United States
(University of Missouri, College of Agriculture, Food and Natural Resources, 2023)
We explored the effects of personality traits and subjective beliefs on willingness to pay (WTP) to avoid genetically modified (GM) foods using a random effects interval regression model. The personality traits were measured ...
Consumer willingness to pay for genetically modified vegetable oil and salmon in the United States and Norway
(University of Missouri, College of Agriculture, Food and Natural Resources, 2017)
Consumer resistance against GM crops is still substantial in the United States and Europe. We conducted an internet survey in the United States and Norway with more than 1,000 respondents in each country to estimate ...
Credit card usage among college students in China
(2018)
Credit cards have become a common method of payment for college students in China. It is important that they form good credit card usage behaviors and build a good credit history early in their financial life. Using data ...
Science and Technology in World Agriculture : Narratives and Discourses
(AgBioForum, 2009)
The narratives characterizing the current debate on world agricultural research tend to be part of a discourse that rationalizes past experience and future tendencies along the lines of extreme recounts of successes and ...
The baths of Trajan Decius, or of Philip the Arab?
(2002)
In a recent publication Laetitia La Follette collected the evidence for the Baths of Trajan Decius, an important but little-known imperial monument of the mid-3rd c. in Rome. Bringing together the ancient literary and ...