نتایج جستجو برای: science growth
تعداد نتایج: 1265292 فیلتر نتایج به سال:
with the increasing population and the need for more food, as well as with the development of science and technology, human approach to unnatural and often chemical inputs to increase agricultural production has been a great expansion and problems such as increased cancers, chronic diseases has created environmental pollution. implementation of organic organic is a solution to these problems . ...
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
Many studies in information science have looked at the growth of science. In this study, we re-examine the question of the growth of science. To do this we (i) use current data up to publication year 2012 and (ii) analyse it across all disciplines and also separately for the natural sciences and for the medical and health sciences. Furthermore, the data are analysed with an advanced statistical...
Background and Aim: Today journals are one of the main platforms to exchange information between researchers. This study aimed to assess the status of Approved Latin indexing journals in the field of medical science citation indexes Web of Science and Scopus databases. Materials and Methods: This study was a cross-sectional descriptive survey. Statistical population of the study was 83 titles ...
از فرآیند گرمای القائی در تکنولوژی و صنعت در موارد زیادی مانند جوش فلزات، بازپخت، متالورژی ]1[ رشد بلور ]4-2[، و ... استفاده می شود. در این روش ماده فلزی مورد نظر (قطعه کار مانند بوته)، داخل یک پیچه ی القائی قرار می گیرد. سپس با ایجاد یک جریان الکتریکی متناوب فرکانس بالا درپیچه (جریان رانشی)، میدان های الکتریکی و مغناطیسی متناوبی در اطراف پیچه ایجاد می شوند. با نفوذ این میدان ها در ماده فلزی مو...
The Islamic Republic of Iran ranked 17th in terms of science production in the world in 2012, according to the latest statistics released by the Scopus database. According to the statistics, Iran produced 34,155 articles in 2012, which gained the country the world’s 17th rank in science production and fixed its top position in the region, above Turkey. Scientific progress over the past few year...
provides an overview of subject repositories (srs) throughout the world in response to the open access movement (oam). it mainly highlights the current trends of repository development in library and information science (lis) field. this paper covers all repositories in lis field as registered in opendoar (directory of open access repository) database. the main objective of the paper is to sele...
abstract this study is an attempt to determine the effect of nano- technology education on science lesson for fifth grade in primary school in the city of kermanshah. this research is experimental and is conducted in the from of pre-test and post- test for the control group. an achievement test was administered to determine the rate of learning in the students. the research is an applied one. ...
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