نتایج جستجو برای: frontiers
تعداد نتایج: 8005 فیلتر نتایج به سال:
This article is citable (as shown above) and is released from embargo once it is posted to the Frontiers e-View site (www.frontiersinecology.org). Please note: This article was downloaded from Frontiers e-View, a service that publishes fully edited and formatted manuscripts before they appear in print in Frontiers in Ecology and the Environment. Readers are strongly advised to check the final p...
Given the challenging environmental issues in the energy sector, the importance of strategic research and development (R&D) planning has been emphasized to manage a turbulent business situation. This study aims to propose a methodology for exploring promising research frontiers in the energy sector. To this end, first, core documents are collected from scientific documents such as patents and a...
The word livestock itself suggests the reduction of animals as living things to economic goods. Disaggregating term into its component parts—live and stock—also suggest difficulty rendering that are alive stocked, especially on large or predicable scales. be is biological; breathe, eat, defecate, move, sleep, grow, reproduce, connect with others, get sick, die. To stock, other hand, economic; s...
this paper uses the concept of meta-frontier to investigate the relationship between meta technology ratios (mtr) and different varieties in datepalms including; mazafati, rabi and zardan that are produced widely in sistan and baluchestan province of iran. we used a stratified sampling of 300 date farmers of this province in 2010, 2011 and 2012 and estimated a stochastic production frontier usi...
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