نتایج جستجو برای: random sampling was done from infected trees during 2004

تعداد نتایج: 8247210  

Journal: :IOP conference series 2021

Abstract Parasitic mite infections are very common on virtually all organisms including tree geckos. This research was aimed to determine the species and prevalence of parasitic mites infecting lizards in Purwokerto, Central Java. employed a survey method with purposive random sampling technique. One hundred individuals were obtained from trees 4 different sub-districts Purwokerto. The results ...

Journal: :international journal of industrial mathematics 2014
r. kazemi

consider the random walk among n places with n(n - 1)/2 transports. we attach an exponential random variable xij to each transport between places pi and pj and take these random variables mutually independent. if transports are possible or impossible independently with probability p and 1-p, respectively, then we give a lower bound for the distribution function of the smallest path at point log...

اولادی, جعفر, متاجی, اسد ا..., میررجبی, حسین,

The goal of this research is to indirectly estimate carbon storage. Carbon sequestrations by the trees in the Pine, ash and false trees-planted areas of Chitgar Forest Park in Tehran, Iran, were estimated by using of GeoEye-1 images. 102 sample areas of 25×20m have been measured using Systematic Random Sampling (SRS) method for the study. The Biomass and carbon sequestration for each sample wer...

Journal: Journal of Nuts 2012
A Eskandari A Mohammadi M Ghelichi M Haghdel

The die-back of pistachio is one of the most important diseases affecting pistachio trees reducing yield production. In commercial fields, sampling was done from nine different pistachio production areas in Mahvelat, Khorasan Razavi province during 2008-2010. In each orchard, samples were taken from tree branches with canker during spring and summer seasons. Fungal species were identified based...

Journal: :جنگل و فرآورده های چوب 0
فریده امیدوار حسینی دانشجوی کارشناسی ارشد رشتۀ جنگلداری، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، تهران، ایران رضا اخوان استادیار پژوهش، مؤسسۀ تحقیقات جنگل ها و مراتع کشور، تهران، ایران هادی کیادلیری استادیار گروه جنگلداری، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران اسداله متاجی دانشیار گروه جنگلداری، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران

one of the most visible aspects of a forest stand structure is the spatial patterns of trees. competition affects on forest structure and its understanding is important, when the purpose of forest management is to imitate the dynamic of natural ecosystems. for this purpose, an unmanaged intact forest was selected with 26 hectares area. all chestnut leaf oak (quercus castaneifolia) trees with a ...

Journal: :JoCG 2015
Luc Devroye James King

Given a set S of n ≥ d points in general position in Rd, a random hyperplane split is obtained by sampling d points uniformly at random without replacement from S and splitting based on their affine hull. A random hyperplane search tree is a binary space partition tree obtained by recursive application of random hyperplane splits. We investigate the structural distributions of such random trees...

Journal: :journal of agricultural science and technology 0
i. sosna department of horticulture, faculty of agriculture, wroclaw university of environmental and life sciences, pl. grunwaldzki 24 a, 50-363 wrocław, poland.

the purpose of this research was to assess the influence of several orchard systems involving trees trained to different leader numbers on growth, cropping, and fruit quality of two apple cultivars. the study was conducted during 1994-2007 at the fruit experimental station in samotwór, next to wrocław (south-western poland). one-year-old trees of ‘elstar’ and ‘jonagold’ cultivars on the m.9 roo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم تربیتی و روانشناسی 1388

چکیده هدف اصلی این پژوهش تعیین رابطه استراتژیهای خود رهبری و خلاقیت اعضای هیات علمی دانشگاه علم و صنعت بوده است. در این پژوهش از روش توصیفی از نوع همبستگی استفاده شده است. جامعه آماری پژوهش کلیه اعضای هیات علمی دانشگاه علم و صنعت در سال تحصیلی 88-1387 بود که بالغ بر345 نفربودندو از این تعداد، 119 نفر استاد با استفاده از روش نمونه گیری تصادفی طبقه ای متناسب با حجم انتخاب شد. ابزار جمع آوری داده...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1390

learning a second or foreign language requires the manipulation of four main skills, namely, listening, reading, speaking, and writing which lead to effective communication. it is obvious that vocabulary is an indispensible part of any communication, so without a vocabulary, no meaningful communication can take place and meaningful communication relies heavily on vocabulary. one fundamental fac...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

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