نتایج جستجو برای: stands
تعداد نتایج: 21645 فیلتر نتایج به سال:
I review ten problems associated with the dynamical wave function collapse program, which were described in the first of these two papers. Five of these, the interaction, preferred basis, trigger, symmetry and superluminal problems, were discussed as resolved there. In this volume in honor of Abner Shimony, I discuss the five remaining problems, tails, conservation law, experimental, relativity...
The notion of functoriality arose from the spectral analysis of automorphic forms but its definition was informed by two major theories: the theory of class fields as created by Hilbert, Takagi, and Artin and others; and the representation theory of semisimple Lie groups in the form given to it by Harish-Chandra. In both theories the statements are deep and general and the proofs difficult, hig...
The goal of this study is to reveal the long-term trajectory of Russian economic development and to make predictions for the future. The study starts with a much discussed question: why Russia did worse economically during transition than most other countries in Europe and Asia? It is argued that it was partly caused by objective circumstances before transition (distortions in industrial struct...
In this volume in honor of GianCarlo Ghirardi, I discuss my involvement with ideas of dynamical collapse of the state vector. 10 problems are introduced, 9 of which were seen following my initial work. 4 of these problems had a resolution in GianCarlo Ghirardi, Alberto Rimini and Tullio Weber’s Spontaneous Localization (SL) model (which added 1 more problem). This stimulated a (somewhat differe...
In order to evaluate the growth function of Populus nigra trees under homogeneous conditions, a total of 24 individuals of P. nigra (3 individuals per stand) were sampled from 8 artificial stands in Kermanshah province and 12 individuals of P. nigra (3 individuals per stand) were sampled from 4 artificial stands in Zanjan province. In order to assimilate environmental conditions, seedlings were...
Tending Operation is one of the most important methods to improve equality and quantity of forest stands. In this study, two stands including non-managed (in parcel No.2) and managed stands (in parcel No.13) at the second series of "Berenjestanak" are selected to investigate the structural followed by tending operation. Thirty hectare of each parcel was selected, the statistic method was system...
One of the important features of plant communities is the spatial pattern of trees. The spatial pattern of the stands determined by measuring and positioning of trees in the stands and inserting them in analytical frameworks. This is because spatial information allows natural resource managers to make and perform better-informed decisions, -. The aim of this study was to assess the spatial patt...
the effects of dominant shrub species on soil organic matter (som), including total soil carbon (sc), total nitrogen (n) and particulate organic matter (pom) were studied in three stands differing in the type of shrub species, i.e. astragalus microcephalus (shrub), pteropyrum aucheri (shrub) and prangus uloptera (non-shrub).the stands were located in arid grasslands of north-western iran. for t...
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