flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

126 abstract: in this research we studied the effects of cyclic hydration and dehydration of cysts of artemia urmiana and artemia parthenogenetica on the hatching percentage, survival and growth. the experiment was carried out in 3 treatments (1-3 hydration/dehydration cycles) with 3 replicates for each treatment. later effects of cold preservation at -20°c during three time periods were ...

the study aims to achieve research and testing of hypotheses survey techniques and questionnaires to collect information used. 61 questions in the questionnaire included 15 questions and 46 open questions according to research in the study population, girls and their mothers as the value of different children investment should be. mothers according to the research community benefits from havi...

cultural iran is a scope that is more extended than the political territories of iran as a political unit. this concept means that cultural geography(mehdi moghanlo-1383-1) of iran is greater than its political geography which, according to history, has a long history extending west-east from kandahar to the euphrates and north-south from the persian gulf to the caucasus including transoxiana a...

objective: the objective of this study was to investigate the invitro fluoride release of four new self-adhesive resin cements; set (sdi, australia), breeze (pentron, usa), embrace wetbond (pulpdent, usa), g-cem (gc, japan) and to assess the bonding performance of these self-adhesive resin cements for bonding of orthodontic brackets. materials and methods: for fluoride release experiment, six ...

in this thesis a calibration transfer method is used to achieve bilinearity for augmented first order kinetic data. first, the proposed method is investigated using simulated data and next the concept is applied to experimental data. the experimental data consists of spectroscopic monitoring of the first order degradation reaction of carbaryl. this component is used for control of pests in frui...

رساله حاضر در چار چوب توسعه فرهنگی به بررسی اقتصاد سینما در ایران می پردازد . اقتصاد سینما بخشی از مقوله اقتصاد فرهنگ است برخی بر این باورند که توسعه فرهنگی مستلزم تلقی فرهنگ به عنوان یک فعالیت اقتصادی است .از این روش ، شاخه اقتصاد فرهنگ می تواند بابررسی تحلیل اثرات و نقش فعالیتهای فرهنگی در توسعه اقتصادی نقش ارزنده ای ایفا کند . در این پژوهش با استفاده از روش تحلیل هزینه – فایده به بررسی توج...

Background and Aim: Economic evaluation of health interventions is critical for efficient allocation of resources. The aim of this study was to critically review empirical studies on the cost-benefit of health interventions published over the last 40 years. Materials and Methods: This study was carried out by searching seven  databases (PubMed, Cochrane Database of Systematic Reviews, Web of...