نتایج جستجو برای: origin of trees

تعداد نتایج: 21174871  

2008
YEVGENIY KOVCHEGOV SCOTT SHEFFIELD

Let Cn be the origin-containing cluster in subcritical percolation on the lattice 1 nZ , viewed as a random variable in the space Ω of compact, connected, origin-containing subsets of R, endowed with the Hausdorff metric δ. When d ≥ 2, and Γ is any open subset of Ω, we prove that lim n→∞ 1 n logP (Cn ∈ Γ) = − inf S∈Γ λ(S) where λ(S) is the one-dimensional Hausdorff measure of S defined using th...

2014
Kevin Williams Eric Van Wyk

Origin tracking is a technique for relating the output of a transformation back to its input. In term rewriting systems, where this notion was developed, it relates subtrees in the resulting normal form term to the original term. The technique is useful in several settings, including program debugging and error reporting. We show how origin tracking can be integrated into higher-order attribute...

اعتمادی, نعمت الله, زمانی, نجمه, مجیدی, محمد مهدی , محمدی نژاد, رضوان,

The major problems in transplanting the landscape trees are high level of mortality and low establishment rate of transplanted trees, especially in the first year. In order to achieve the best condition for successful transplanting of pine and plane trees in Isfahan landscape, the present study was carried out based on a completely randomized block design with four replicates and three treatmen...

Journal: :جنگل و فرآورده های چوب 0
مرتضی مریدی دانشجوی کارشناسی ارشد جنگل‏ شناسی و اکولوژی جنگل دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران وحید اعتماد استادیار گروه جنگل داری و اقتصاد جنگل دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران کیومرث سفیدی استادیار دانشکدة فناوری کشاورزی و منابع طبیعی دانشگاه محقق اردبیلی، اردبیل، ایران منوچهر نمیرانیان استاد گروه جنگل داری و اقتصاد جنگل دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران سید محمد معین صادقی دانشجوی کارشناسی ارشد جنگل‏ شناسی و اکولوژی جنگل دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

knowledge of the stand condition and the gradual replacement of tree species in different development stages and phases provide appropriate information related to the close to nature treatments. stem exclusion phase is one of the important development phases in the forest stands development. the aim of study was to analyze the characteristics of dead trees in the stem exclusion phase in the les...

.  Introduction Old trees are important and key elements of forest sites and are of great value in terms of forest management, reforestation, silviculture and ecology. Although old trees constitute a small percentage of forest trees, they account for a large share of forest carbon reserve and play a vital role in carbon storage. Understanding the how geographical and site distribution of thes...

Journal: :genetics in the 3rd millennium 0
azin najd ejlali yousef mehmannavaz

the objective of the present study was to evaluate the genetic structure and diversity of 16 generations of native fowls of west azerbaijan province, iran using the pedigree data collected between 1994 and 2012. inbreeding coefficient (f), pedigree completeness index (pci), parameters of the probability of gene origin and other parameters related to the genetic structure were estimated using th...

Journal: :ادیان و عرفان 0
منصور پهلوان استاد دانشگاه تهران سید عبدالحمید حسینی زاده استادیار دانشگاه پیام نورمرکز مهریز

a doctrine which has played a significant role in the beliefs of the jews, the christians and the moslems is the issue of the garden of eden and the renowned tree in it (one tree in islam, and two trees in the judaism and christianity, i.e. the tree of life and the tree of knowledge). this essay deals with a comparative study of the forbidden tree in judaism and islam, and for this sake we have...

Journal: :علوم اجتماعی 0

in this article, the writer, exploring the most important theories of psychologists, anthropologists and sociologists about the origin of religion and roots of religiosity, tries to show that there is no ultimate agreement and explanation about these questions and that the currently working theories are suffering from grave theoretical and/or empirical shortcomings. the writer, however, argues ...

In order to investigate the seasonal changes and the possible role of the free polyamines in the leaves and stems on the alternate bearing habit of the ‘Kinnow’ mandarin (Citrus reticulata Blanco) trees, a comparative study was conducted to analyze the levels of free polyamines  (putrescine, spermidine and spermine) in the leaves and stems tissues of “on” and &ldquo...

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