نتایج جستجو برای: economic challenges
تعداد نتایج: 590077 فیلتر نتایج به سال:
the purpose of this study was to investigate the challenges of agricultural water management from farmers’ viewpoint. the statistical population consisted of 5297 farmers in karaj county. a total number of 142 farmers were selected applying cochran’s formula. the sample was drawn using stratified sampling method with proportional allocation. to collect data, a questionnaire was developed. to en...
Introduction and purpose: The World Health Organizatoin Package of Essential Noncommunicable (PEN) Diseases Interventions is a prioritized set of costeffective interventions that can provide quality care even in the low-resource settings. The present study aimed to determine the challenges of implementing this package in Iran’s healthcare system. Methods: This qua...
This paper summarizes the findings and recommendations of a recent panel on Future Directions in Control, Dynamics, and Systems, sponsored by the US Air Force Office of Scientific Research. A set of grand challenges that illustrate some of the recommendations and opportunities are provided. Finally, the paper describes two new courses being developed at Caltech that are aligned with the recomme...
One of the grand challenges for society is global security in food and nutrition. The ‘‘perfect storm’’ metaphor has been used by Sir John Beddington to describe the scenario that wemight be heading for, with simultaneous shortages for food, water, and energy within the foreseeable future. This Select highlights the need for a truly multipronged approach across scientific disciplines and countr...
The results for heavy-light mesons are summarized in Table 1. The results presented here are based on the same statistical sample, consisting of 102 quenched configurations at β = 6.0 with lattice size 16 × 48, as used in our study of fB and fBs [1]. The details of the NRQCD action, the evolution equation for calculating the heavy quark propagator, the method used for setting the lattice scale,...
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