نتایج جستجو برای: if productivity undergoes a divergence trend
تعداد نتایج: 13506507 فیلتر نتایج به سال:
In this study, a model was developed to determine the optimal irrigation schedule for the Qazvin Plain in such a way that economic productivity is maximized with the amount of water available and the area under cultivation. The AquaCrop plant growth model was used to determine crop performance in different irrigation programs. The plant growth model was connected to the MATLAB programming envir...
Bayesian evolutionary analysis provide a statistically sound and flexible framework for estimation of evolutionary parameters. In this method, posterior estimates of evolutionary rate (μ) are derived by combining evolutionary information in the data with researcher’s prior knowledge about the true value of μ. Nucleotide sequence samples of fast evolving pathogens that are taken at d...
In recent decades, research has grown increasingly in Iran and consequently, the country has risen dramatically in world rankings based on the number of scientific documents. However, there are many evidences that show these researches were ineffective. Therefore, their efficacy should be evaluated which is the main purpose of this study. In this regard, using the descriptive-analytical method ...
The last decade has ushered in a rapidly expanding global discussion regarding acellular dermal matrix (ADM) applications, economic analyses, technical considerations, benefits, and risks, with recent emphasis on ADM use in breast surgery. This study aims to evaluate global trends in ADM research using bibliometric analysis. The top nine Plastic Surgery journals were determined by impact factor...
most developing countries have achieved productivity growth in economic sectors like agriculture for more than 30 years. universities and governmental research centers have tried to generate knowledge with direct social and economic effects during these decades. so, productivity and production growth can be attributed to technological changes made possible through investment in agricultural res...
Functional diversity is hypothesised as being beneficial for ecosystem functions, such as productivity and resistance to invasion. However, a precise definition of functional diversity, and hence a framework for its quantification, have proved elusive. We present a definition based on the analogy of the components of species diversity / richness, evenness and divergence. These concepts are appl...
Degradation of semi-arid and arid ecosystems due to desertification is arguably one of the main obstacles for sustainability in those regions. In recent decades, the Mu Us Desert in China has experienced such ecological degradation making quantification of spatial patterns of desertification in this area an important research topic. We analyzed desertification dynamics for seven periods from 19...
Productivity improvement, as an efficient and effective way of using inputs,is the most important aim in any economy. The first step to improve each economic variable is the recognition of current situation. There is a lot of researchmeasuring TFP in macroeconomic level but all of them calculated effiecency and neglegted effectiveness.This study is based on institutional economic framework and ...
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