نتایج جستجو برای: quantity and diversity

تعداد نتایج: 16854509  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده برق و کامپیوتر 1392

abstract nowadaysphotovoltaic solar cells (pvs) areacknowledged the fastest growing energy technology in the word, however, they only account for only fraction of current global renewable energy capacity. it isrecognized that this incomplete market penetration has been largely a result of the technology’sexcessive cost. so researchers are trying to find innovative, economic way with theaim of ...

Fahmideh, Leila, Fakheri, Barat Ali, Kikhasaber, Mojtaba, Raeisi, Fatemeh,

Due to the importance of date palm production in Iran, introduction of new cultivars, improvement of current cultivars and studying the genetic diversity among available cultivars is essential for improvement the quantity and quality of date palm production. In this research, 15 different local genotypes of date palm collected from Saravan, Jalgh, Nahook and Sinokan regions of Sistan and Baluch...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1389

in reality, most structures involved in geotechnical engineering are three dimensional in nature, and although in many, plane strain or axisymmetric approximations are reasonable, there are some, for which 3-d treatment is required. the quantity of data, and the size of the various vectors and matrices involved in such analysis, increase dramatically. this has sever implications for computer r...

      One of the most important issue at natural resources management is plant diversity conservation and detecting the different effects of usage methods on the its quality and quantity. This research was done with the goal of investigating the disaster center (village) at evaluation of rangeland damage with the accent of plant cover combination and diversity in Sabalan mountain southeast rang...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات 1390

this study is an outlook of iranians religious practices and customs in eras such as nasser one. it attempts to answer the main question, "religious practices and ceremonies in the society during naseri ruling" and other subsidiary questions with scientific and historical theories. iran was a traditional and religious community . people abided by their religious practices and duties within reli...

Journal: :Cognitive science 2018
Jessica L Montag Michael N Jones Linda B Smith

The words in children's language learning environments are strongly predictive of cognitive development and school achievement. But how do we measure language environments and do so at the scale of the many words that children hear day in, day out? The quantity and quality of words in a child's input are typically measured in terms of total amount of talk and the lexical diversity in that talk....

ژورنال: پژوهش در پزشکی 2003
فریدون عزیزی, , فاطمه محمدی, , پروین میرمیران, ,

Background: The present study was conducted to determine the dietary diversity score and its association to other measure of diet quality, including mean adequacy ratio. Materials and methods: After excluding the underreported subjects, 581 individuals over 18 years old (295 women & 286 men) were selected. Their dietary intake assessments were based on 2 day 25 hour food recall interview. A di...

2014
Nadja K. Simons Martin M. Gossner Thomas M. Lewinsohn Steffen Boch Markus Lange Jörg Müller Esther Pašalić Stephanie A. Socher Manfred Türke Markus Fischer Wolfgang W. Weisser

Intensive land use is a driving force for biodiversity decline in many ecosystems. In semi-natural grasslands, land-use activities such as mowing, grazing and fertilization affect the diversity of plants and arthropods, but the combined effects of different drivers and the chain of effects are largely unknown. In this study we used structural equation modelling to analyse how the arthropod comm...

   Floral diversity is a measure of number of type flora in an area, and reflects how vegetation develops in response to the environmental condition during a certain time interval. The present study aims to examine changes in the diversity of vegetation (pollen, spores and algae), evenness, and similarity in the Bandung Basin through a core of 240 cm depth using a ground drill, as well as  the ...

Journal: :علوم باغبانی ایران 0
مهدی حدادی نژاد استادیار، دانشگاه علوم کشاورزی و منابع طبیعی ساری حسین مرادی استادیار، دانشگاه علوم کشاورزی ومنابع طبیعی ساری

this study performed to evaluate genetic diversity of some wild and domesticated (unknown foreign cultivars) blackberries in sanru collection based on morphological traits. results showed high diversity for flowering, ripening time and fruit juice. wild genotypes showed significant differences in leaf, flower, thorn number, fruits and seed fresh weight compared to domesticated cultivars. based ...

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