Ab initio molecular dynamics simulations are used to solve the long-standing problem of calculating the free energies of unstable phases, such as fcc W. We find that fcc W is mechanically unstable with respect to long-wavelength shear at all temperatures considered (T>2500 K), while the short-wavelength phonon modes are anharmonically stabilized. The calculated fcc-bcc enthalpy and entropy diff...

Solar model predictions of 8B and p-p neutrinos agree with the experimentally determined fluxes (including oscillations): phi(pp)(measured)=(1.02+/-00.02+/-0.01)phi(pp)(theory) and phi(8B)(measured)=(0.88+/-0.04+/-0.23)phi(8B)(theory), 1sigma experimental and theoretical uncertainties, respectively. We use improved input data for nuclear fusion reactions, the equation of state, and the chemical...

This research provides information about land prices in Jakarta by classifying using the Random Forest method. Where is a data mining technique that usually used to perform classification and regression. one of best methods. It found accuracy will increase dramatically as result voting select class types ensemble tree growth. The method helps providing with per meter less than IDR 15 million, p...

A geometrically anisotropic spatial process can be viewed as being a linear transformation of an isotropic spatial process. Customary semivariogram estimation techniques often involve ad hoc selection of the linear transformation to reduce the region to isotropy and then tting a valid parametric semivariogram to the data under the transformed coordinates. We propose a Bayesian methodology which...

Spatial analysis of insect counts provides important information about how insect species respond to the heterogeneity of a given sampling space. Contour mapping is widely used to visualize spatial pest distribution patterns in anthropogenic environments, and in this study we outlined recommendations regarding semivariogram analysis of small data sets (N < 50). Second, we examined how contour m...

Semivariograms have been widely used in research to obtain optimal resolutions for ground features. To obtain the semivariogram curve and its attributes (range and sill), parameters including sample size (SS), maximum distance (MD), and group number (GN) have to be defined, as well as a mathematic model for fitting the curve. However, a clear guide on parameter setting and model selection is cu...

objective: this study was conducted to determine the changes in the insular cortex in alcohol dependent subjects, and to compare the same with controls, the associated clinical findings. methods: the study group consisted of 30 subjects with alcohol dependence syndrome (ads) selected randomly from the out patient services of the department of psychiatry of a tertiary care hospital. the control ...