Using up-to-date stellar models and isochrones we determine the age of 25 galactic halo clusters. The clusters are distributed into four groups according to metallicity. We measure the absolute age of a reference cluster in each group, and then find the relative ages of the other clusters relative to this one. This combination yields the most reliable results. We find that the oldest cluster gr...

While heterogeneity in social behaviour has been described in many human contexts it is often assumed to be less common in the animal kingdom even though scale-free networks are observed. This homogeneity raises the question of whether the patterns of behaviour necessary to account for scale-free social contact networks, where the degree distribution follows a power law, i.e. a few individuals ...

introduction: the objective of the study was to develop an instrument to measure patient education content. materials and methods: first of all, literature searches were undertaken to determine current national and international patient education questionnaires. then a forty five item questionnaire was developed. questionnaires were filled by 399 patients in surgery wards of kerman medical hosp...

On the basis of experimental Rayleigh-Brillouin scattering data in gaseous nitrogen and air, simulations are performed to describe the observed frequency profiles in analytical form. The experimental data pertain to a λ = 366 nm scattering wavelength, a 90° scattering angle, pressures of 1 and 3 bar, and temperatures in the range 250 - 340 K. Two different models are used to represent the RB-pr...

BACKGROUND The physical environment of healthcare buildings has great importance in issues such as patient safety, functional efficiency, user satisfaction, healthcare outcomes, and energy and resources consumption. OBJECTIVES The present study assesses physical environments of Iranian healthcare buildings. MATERIALS AND METHODS This study was performed using a descriptive-analytical method...