نتایج جستجو برای: 86465223 hectares class 2 of extensive outdoor recreation potential
تعداد نتایج: 21541226 فیلتر نتایج به سال:
هدف این پایان نامه تعیین تعداد مولدهای مینیمال ایده آلها در یک حلقه (جابجایی، یکدار، موضعی و نوتری) است، هر چند تعیین دقیق تعداد مولدها در حالتهایی خاص امکان پذیر است اما در حالتهای کلی روش های موجود بدست آوردن کرانهای مختلف برای تعداد مولدها است. مرجع اصلی این پایانامه [1] می باشد، به علاوه از نتایج جدیدی که در مرجع [2] نیز آمده استفاده کرده ایم. [1]. j. sally. numbers of generator...
Brooks, David J.; Haynes, Richard W. 2001. Recreation and tourism in South Central Alaska: synthesis of recent trends and prospects. General Technical Report GTR-PNW-XXX. Portland, OR. U.S. Department of Agriculture, Forest Service. XX p. Tourism has been the fastest-growing component of Alaska's economy for the past decade and is an important export sector for the regional economy. Opportuniti...
European agricultural landscapes have been shaped by humans to produce marketable private goods such as food, feed, fiber and timber. Land-use intensification to increase provisioning services in such productive landscapes alters the capacity of ecosystems to supply other services (often public goods and services) that are also vital for human wellbeing. However, the interactions, synergies and...
This study examines time-use for outdoor recreation during 1965 to 2007. Using data on over 47,000 individuals from six nationally representative time-use surveys, we first document time-use trends between 1965 and 2007. We then develop a two-part instrumental variable censored regression model (a hurdle model) to predict individual-level time-use. Our results show that per capita time-use in o...
The key words in forest management for the 2 I st century are “sustainable management”. In this paper we present an overview of the nature of outdoor recreation demand growth in the United States and its significance in light of the need to sustain the nation’s forests. We show that outdoor recreation demand is growing faster now than at any time in the last five decades. Accelerated management...
abstract: the present study was undertaken to investigate whether 1) there is any significant correlation between iranian efl/eap learners’ l2 writing proficiency and their willingness to communicate, 2) there is any significant difference between efl and eap learners in terms of willingness to communicate, 3) there is any significant difference in wtc of iranian efl/eap learners with 1- nati...
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