نتایج جستجو برای: evaluation of science production
تعداد نتایج: 21288033 فیلتر نتایج به سال:
در حالت کلی معادلات حاکم بر یک مدل ریاضی از مخزن را نمی توان بوسیله روشهای تحلیلی حل کرد، در حالیکه یک مدل عددی می تواند بوسیله کامپیوتر جوابی تقریبی ارائه دهد. در این پایان نامه، یک دستگاه معادلات دیفرانسیل معمولی توسط گسسته-سازی معادله حاکم بر جریان شعاعی تک فازی نفت بسمت یک چاه (معادله چاه آزمایی) به دست آمده است. این سیستم شامل محاسبه تابع ماتریسی (exp(ka است که در آن k گام زمانی و a ماتریس...
the aim of this study was comparative evaluation of iran scientific output in the field of food science and technology with five countries including ireland, turkey, egypt, argentina and malaysia during 1990-2010 in the web of science. the number of indexing scientific outputs in this database show that ireland, argentina and turkey ranked sequentially. articles have the largest share of scient...
gladiolus (gladiolus grandiflorus l.), a popular bulbous cut flower, has high demand in both domestic (pakistani) as well as international markets. five potential, exotic cultivars of gladiolus, ‘cantate’, ‘corveira’, ‘eminence’, ‘essential’ and ‘fado’ were evaluated to determine the cultivar effects on yield and quality, to compare their relative performance and recommend their suitability for...
abstract this study was carried out to compare disinfecting effects of nanosilver with other feed disinfectants on layer hen performance, immune system, gastrointestinal microflora and intestinal morphology. total of 90 layers (lsl) were divided into five groups consisting: 1-control, 2- formalin (200 ppm), 3- formaycin (200 ppm), 4- nanosilver in drinking water (7.5 ppm) and 5-nanosilver in f...
one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...
In this paper, the scientific methodology of the contemporary philosopherImre Lakatos is revised to construct a methodology for theological systems. In this methodology, each theological system consists of the following main elements: (1) hard core I, (2) protective wall, (3) hard core II, and (4) auxiliary hypotheses. We will expound the criteria for the evaluation of different theolo...
Background and Objectives: Nowadays, cell therapy is one of the most important and promising strategies in the treatment of diseases. Unique capabilities of stem cells caused them to be used in both research and treatment as a valuable resource in basic science and medical researches. The use of stem cells has been limited due to the related ethical problems. One of the major concerns of sci...
abstract: this study uses esi indicators and statistics database for comparative evaluation of scientific production of iran, turkey, egypt and pakistan during 2002- 2012. this study is a survey and is done scientometrics approaches. spss software used for analysis of findings. toky and pearson correlation test was performed. study population was leader islamic countries who indexed base of esi...
in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...
the main purpose of this study was to identify factors affecting the validity of the results of the student evaluation. the research method was mixed method. participants of the qualitative part were masters of educational science and participants of the quantitative part were bsc students of psychology and educational sciences of state universities of tehran entered in 1389 and 1390. in the qu...
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