نتایج جستجو برای: economical issues

تعداد نتایج: 326434  

2002
Noga Alon

Let t(n, d) be the minimum number t such that there are t of the n lattice points {(x1, . . . , xd) : 1 ≤ xi ≤ n} so that the ( t 2 ) lines that they determine cover all the above n lattice points. We prove that for every integer d ≥ 2 there are two positive constants c1 = c1(d) and c2 = c2(d) such that for every n c1n d(d−1)/(2d−1) ≤ t(n, d) ≤ c2n log n. The special case d = 2 settles a proble...

2015
Franz Wirl

Article history: Received 21 April 2008 Received in revised form 13 May 2009 Accepted 14 May 2009 Available online 27 May 2009 This paper assumes that the decision makers of OPEC (or at least of its core members) are interested in both profits and political payoffs (support, popularity, being a hero of the Arab or Islamic street, etc.). The oil weapon, i.e. a reduction of output is the most pow...

Thisarticle first reviews the history of political science teaching in Europebefore going on to consider a range of recent developments in the teaching of politicalscience, including cross-national joint programmers; technologically enhancedlearning; placement learning and problem-based learning. The last sectionconsiders a range of issues facing political science teachers, includingfinancial p...

Journal: :پژوهشنامه تاریخ های محلی ایران 0

abstract in the 7th and 8th centuries of hijri, kish island had been the maritime trade center of the persian gulf under the reign of  bani gheisar government, and any changes in this area has affected the neighboring areas and further lands. the objective of this essay is to study the economic changes of kish island and its excellent position in the maritime trade of the persian gulf, oman sea...

2012
Hamid Bahrami

Today, transportation is one of the substructure parts of society that not only affects the economical growth process, but also is changed in development. The transportation substructure is one of the substructure parts of services has an important position in the economical development of countries. An efficient and appropriate transportation network causes goods transportation and services co...

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

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

Journal: :international journal of architecture and urban development 2012
biao wang meisi lv jia guo kang li

urbanisation is still one of the social themes in developing countries. in china, the rapid process of urbanisation and economic growth bring to people not only more opportunities for creating new life and pursuing happiness, but also the challenge to face various and complex social, economical and environmental problems. among them some are outstanding, like the shrinking plowland devoured by ...

Journal: :Geographical Review of Japan 1935

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