2,050 research outputs found
Snapshot Observation for 2D Classical Lattice Models by Corner Transfer Matrix Renormalization Group
We report a way of obtaining a spin configuration snapshot, which is one of
the representative spin configurations in canonical ensemble, in a finite area
of infinite size two-dimensional (2D) classical lattice models. The corner
transfer matrix renormalization group (CTMRG), a variant of the density matrix
renormalization group (DMRG), is used for the numerical calculation. The matrix
product structure of the variational state in CTMRG makes it possible to
stochastically fix spins each by each according to the conditional probability
with respect to its environment.Comment: 4 pages, 8figure
Nitrogen availability and economic returns of various crop rotations with forage and annual crops
Non-Peer Reviewe
Nitrogen availability and economic returns of various crop rotations with forage and annual crops
Non-Peer Reviewe
Orbital Characteristics of the Subdwarf-B and F V Star Binary EC~20117-4014(=V4640 Sgr)
Among the competing evolution theories for subdwarf-B (sdB) stars is the
binary evolution scenario. EC~20117-4014 (=V4640~Sgr) is a spectroscopic binary
system consisting of a pulsating sdB star and a late F main-sequence companion
(O'Donoghue et al. 1997), however the period and the orbit semi-major axes have
not been precisely determined. This paper presents orbital characteristics of
the EC 20117-4014 binary system using 20 years of photometric data. Periodic
Observed minus Calculated (O-C) variations were detected in the two highest
amplitude pulsations identified in the EC 20117-4014 power spectrum, indicating
the binary system's precise orbital period (P = 792.3 days) and the
light-travel time amplitude (A = 468.9 s). This binary shows no significant
orbital eccentricity and the upper limit of the eccentricity is 0.025 (using 3
as an upper limit). This upper limit of the eccentricity is the lowest
among all wide sdB binaries with known orbital parameters. This analysis
indicated that the sdB is likely to have lost its hydrogen envelope through
stable Roche lobe overflow, thus supporting hypotheses for the origin of sdB
stars. In addition to those results, the underlying pulsation period change
obtained from the photometric data was = 5.4 (0.7)
d d, which shows that the sdB is just before the end of the
core helium-burning phase
Weight Status and Satisfaction With Healthcare Received in the U.S. And Georgia
Background: Two-thirds of the U.S. population is overweight or obese, and, in Georgia, adult obesity rates are among the highest. Obesity is a risk factor for diabetes, heart disease, stroke, and some types of cancer, and adherence to treatment of such disease conditions is affected by patients’ perception of healthcare received. The present study examined the association between weight status and satisfaction with healthcare received in the U.S. and in Georgia.
Methods: The association between weight status and satisfaction with healthcare received in the U.S. and Georgia was examined using multiple logistic regression analyses, controlling for demographic and other healthcare-related variables. The data used were from the 2013 Behavioral Risk Factor Surveillance System (BRFSS) dataset.
Results: There were 265,468 complete cases for the U.S., 66% (181,911) were overweight or obese. The odds of being very satisfied with healthcare received was lower for the underweight, overweight, and obese groups by 11.8% (p \u3c0.001), 2.4% (p = 0.022), and 10.1% (p \u3c0.001), respectively, compared to the normal group. Of the 5,947 complete cases for Georgia, 62% (3698) were overweight or obese. The odds of being very satisfied with healthcare received was lower for the overweight and obese groups by 15.1% (p = 0.023) and 18.3% (p = 0.006), respectively, compared to the normal group.
Conclusions: The probability of being very satisfied with healthcare received is lower for obese and overweight patients. Improvements in healthcare services provided to these individuals are needed to ensure satisfaction and adherence to treatment of chronic diseases, including weight loss treatment and management
Electron-phonon interaction in transition metal diborides TB_2 (T=Zr, Nb, Ta) studied by point-contact spectroscopy
The electron-phonon interaction (EPI) in transition metal diborides TB_2
(T=Zr, Nb, Ta) is investigated by point-contact (PC) spectroscopy. The PC EPI
functions were recovered and the EPI parameters lambda<0.1 were estimated for
all three compounds. Common and distinctive features between the EPI functions
for those diborides are discussed also in connection with the superconductivity
in MgB_2.Comment: V2: minor changes, Ref.[21] added, publ. in PR
An Automated Rice Transplanter with RTKGPS and FOG
Rosana G. Moreira, Editor-in-Chief; Texas A&M UniversityThis is a Technical Paper from International Commission of Agricultural Engineering (CIGR, Commission Internationale du Genie Rural) E-Journal Volume 4 (2002): Y. Nagasaka, K. Taniwaki, R. Otani, and K. Shigeta. An Automated Rice Transplanter with RTKGPS and FOG. Vol. IV. October 2002
- …