نتایج جستجو برای: forest policy

تعداد نتایج: 364545  

2002
Martine Antona Pierre Bommel François Bousquet Christophe Le Page

Since the end of the 70’s, various forest policies have been implemented in the Sahel to address the problem of ecosystem degradation and the increasing need for fuelwood energy. In Niger, a new environment-oriented policy is now being implemented, in conjunction with the decentralization process and the transfer of specific forest user-rights to the local population. Incentives, regulations an...

2013
Marine Elbakidze Kjell Andersson Per Angelstam Glen W. Armstrong Robert Axelsson Frederik Doyon Martin Hermansson Jonas Jacobsson Yurij Pautov

This paper analyzes how sustained yield (SY) forestry is defined and implemented in Sweden and Russia, two countries with different forest-industrial regimes. We first compare definitions of SY forestry in national legislation and policies. Then we study forest management planning in two large forest management units with respect to: delivered forest products and values, how the harvest level o...

Journal: :Environmental management 2008
Trevor J Webb David N Bengston David P Fan

This article explores the expression of three forest value orientations that emerged from an analysis of Australian news media discourse about the management of Australian native forests from August 1, 1997 through December 31, 2004. Computer-coded content analysis was used to measure and track the relative importance of commodity, ecological and moral/spiritual/aesthetic forest value orientati...

Journal: :SIAM J. Comput. 1997
Zhen Liu Eric Sanlaville

In this paper, we consider the stochastic profile scheduling problem of a partially ordered set of tasks on uniform processors. The set of available processors varies in time. The running times of the tasks are independent random variables with exponential distributions. We obtain a sufficient condition under which a list policy stochastically minimizes the makespan within the class of preempti...

1991
Zhen LIU Eric SANLAVILLE

In this paper, we consider the stochastic proole scheduling problem of a partially ordered set of tasks on uniform processors. The set of available processors varies in time. The running times of the tasks are independent random variables with exponential distributions. We obtain a suucient condition under which a list policy stochastically minimizes the makespan within the class of preemptive ...

2013
CURTIS H. FLATHER GREGORY D. HAYWARD STEVEN R. BEISSINGER PHILIP A. STEPHENS Philip A. Stephens

1 USDA Forest Service, Rocky Mountain Research Station, Fort Collins, CO 80526, USA 2 USDA Forest Service, Alaska Region, Anchorage, AK 99503, USA; and Department of Zoology & Physiology, University of Wyoming, Laramie, WY 80271, USA 3 Department of Environmental Science, Policy & Management, University of California, Berkeley, CA 94720, USA 4 School of Biological and Biomedical Sciences, Durha...

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