in solvo-hydrothermal method, xrd pattern was indicated presence of intermediate of ammonium octatmolybdate and ammonium tetramolybdate, which were changed to stble phase of ?-moo3 annealing. sem images were indicated nanoparticle with semispheical morphology and tem image was demonstrated nanoparticles with a diameter size of 25nm. also in impregnate method. the xrd pattern was shown high crys...

bekenstein and hawking by introducing temperature and every black hole has entropy and using the first law of thermodynamic for black holes showed that this entropy changes with the event horizon surface. bekenstein and hawking entropy equation is valid for the black holes obeying einstein general relativity theory. however, from one side einstein relativity in some cases fails to explain expe...

Background and purpose: In order to improve the efficiency, effectiveness and quality of health care services, it is necessary to manage their organizational knowledge and information. In this paper, the readiness of Iran’s health centers for establishing knowledge management was studied. Materials and methods: We conducted a descriptive study in which the status of some indicators f...

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

The purpose of this study was to investigate the relationship among servant leadership, team effectiveness, and team performance of the Iranian men's volleyball pro-league teams. Descriptive co-relational used as a research design. The statistical sample included players (n=173) and assistant coaches (n=66) from 15 teams. The data collected were gathered using two instruments: (a) The Organizat...

Introduction:The evidences suggests that Iranian hospital managers do not apply a standard device for assessing leadership performance, and identifying strong and weak points to devise the executive plans required to improve leadership. The present study was aimed to promote the application of self-assessment system through measuring leadership performance at the Khorramabad hospitals, to incre...

With an interpretive approach, this paper seeks to provide the graunded theory on how to distribute power and parallel leadership in large urban schools using the Charmaz’s method. The research focuses on the main question of what are the backgrounds, key processes, intervening factors, and consequences of leadership sharing in parallel in schools. Therefore, the data were collected from semi-s...

abstract: in this thesis, we focus to class of convex optimization problem whose objective function is given as a linear function and a convex function of a linear transformation of the decision variables and whose feasible region is a polytope. we show that there exists an optimal solution to this class of problems on a face of the constraint polytope of feasible region. based on this, we dev...