introduction: one of the reasons people do not refer to dental offices is anxiety over pain. preoperative education is one of non-pharmacological methods to treat anxiety. this study evaluated the effect of preoperative education on decreasing state and trait anxiety in patients referring to a dental surgery center. materials and methods: the subjects in this clinical trial consisted of all the...

regional information center for science and technology ( ricest ), located in fars state, is one of the international institutions of the ministry of science, research and technology which is active in the area of information production and dissemination. the following interview is aimed at providing the information societies as well as our respectable readers with useful information regarding ...

in state-investor dispute, investor tends that umbrella clause transfers all contractual claims to treaty claims. by contracts, state follows narrow interpretation of this clause. up to ilc articles, establishing of responsibility of state for breach of contract requires tow preconditions. first state is merely responsible when state condoct has been of governmental nature and second is that br...

in this work an analytical equation of state has been employed to calculate the pvt properties ofternary refrigerant mixtures. the theoretical eos is that of ihm, song and mason, which is based onstatistical-mechanical perturbation theory, and the two constants are enthalpy of vaporization δhvapand molar density ρnb, both at the normal boiling temperature. the following three temperaturedepende...

a survey of mottled enamel in a military educational center in karaj area of metropolitan tehran was conducted from august to september 1978, on a population of 1789 student, aged 18-23 gathered from 32 areas of iran. dean clinical standards used for diagnosing dental fluorsis and orion lonalyzer fluoride electrode was used to determine the fluoride content of communal waters of endemic areas. ...

the existence of an organization depends on communications and this is an area that managers spend most of their time on. therefore, recognition of communication skills accompanied with its implementation is among the essential parameters of successful management in any organization. in this study we decided to determine the relationship between managers' communication skills and health of orga...

using the lennard-jones (12-6) potential, a new equation of state is obtained that can predict properties of both gases and liquids relatively well. this equation of state is given as (z-a)v2=(a/v2)-b, where z is the compressibility factor, a and b are constants, and a is an adjustable parameter that depends on the temperature, volume and the nature of the fluid, and its expressions depends upo...

in this article, the discrete time state space model with first-order autoregressive dependent process noise is considered and the recursive method for filtering, prediction and smoothing of the hidden state from the noisy observation is designed. the explicit solution is obtained for the hidden state estimation problem. finally, in a simulation study, the performance of the designed method ...