نتایج جستجو برای: 4600 bc
تعداد نتایج: 17376 فیلتر نتایج به سال:
Rainer Schindl, Reinhard Fritsch, Isaac Jardin, Irene Frischauf, Heike Kahr, Martin Muik, Maria Christine Riedl, Klaus Groschner , and Christoph Romanin From the Institute for Biophysics, University of Linz, A-4020 Linz, Austria, the Institute of Pharmacology and Toxicology, University of Graz, A-8010 Graz, Austria, the Department of Physiology, University of Extremadura, 10003 Caceres, Spain, ...
رمزنگاری کوانتومی به بیان و توصیف کاربرد مکانیک کوانتومی برای انجام رمزنگاری و یا شکستن سیستم های رمزی و پنهانی می پردازد. مهمترین و شناخته شده ترین کاربرد رمزنگاری کوانتومی، توزیع کلید کوانتومی (qkd) است. هدف qkd استفاده از ارتباطات کوانتومی به منظور طراحی و به اشتراک گذاری یک کلید بین دو طرف است به طوریکه هیچ شخص سومی، حتی اگر تمام مخابرات و ارتباطات بین آلیس و باب را استراق سمع کند، نتواند ه...
H. Lim1, A. Virani2, A. Fok3, A. Karsan4, D. Renouf1, K.A. Gelmon5, S. Yip6, S. Chia7, S. Sun1, A. Tinker1, S.J. Lee8, R. Rassekh9, R. Deyell9, R. Roscoe3, S. Jones3, E. Pleasance3, M. Marra3, J. Laskin1 Medical Oncology, British Columbia Cancer Agency, Vancouver, BC, CANADA Ethics, BC Children’s and Women’s Hospital, Vancouver, BC, CANADA Genome Sciences Centre, BC Cancer Agency, Vancouver, BC...
Action languages are formal models of parts of natural language that are designed to describe effects of actions. Many of these languages can be viewed as high level notations of answer set programs structured to represent transition systems. However, the form of answer set programs considered in the earlier work is quite limited in comparison with the modern Answer Set Programming (ASP) langua...
Gershtein S. In the framework of potential models for heavy quarkonium the mass spectrum for the system (¯ bc) is considered. Spin-dependent splittings, taking into account a change of a constant for effective coulomb interaction between the quarks, and widths of radiative transitions between the (¯ bc) levels are calculated. In the framework of QCD sum rules, masses of the lightest vector B * ...
hydrotactic. Alternatively, cells may rely on sensing parameters that vary with desiccation, such as salinity, temperature or the presence of other chemical species. We have also seen this behaviour in other desert-soil cyanobacteria — for example, the common Microcoleus vaginatus . If it is widespread among prokaryotes, this response may be crucial for survival and dispersal in terrestrial env...
two vessels from different sites of the iranian plateau, dating to the late 4th or early 3rd millennium bce are presented aspalaeotechnological case studies. in the fractures of the vessels’ walls, interfaces left by added clay parts (enhanced inthe two illustrations) are quite recognizable. it is proposed that in both cases potters, in order to construct the bases, usedto make bowls comparable...
principle that most of us are linked by short chains of acquaintances — was first investigated as a question in sociology and is a feature of a range of networks arising in nature and technology. Experimental study of the phenomenon revealed that it has two fundamental components: first, such short chains are ubiquitous, and second, individuals operating with purely local information are very a...
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