Global solar radiation (Rs( on a horizontal surface in the estimation of evapotranspiration of plants and hydrology studies is an important factor. Average daily global solar radiation on a horizontal surface was estimated by artificial neural networks (ANNs) and five empirical models including FAO (No.56), Hargreaves-Samani, Mahmood-Hubard, Bahel and Annandale. The weather data was selected fr...

Climatic change can impose physiological constraints on species and can therefore affect species distribution. Bioclimatic predictors, including annual trends, regimes, thresholds and bio-limiting factors are the most important independent variables in species distribution models. Water and temperature are the most limiting factors in arid ecosystem in central Iran. Therefore, mapping of climat...

EnThe present research studied the relationship between organizational learning elements and human resources performance. Population of the research consisted of all managers Tehran Telecommunication Company. Data were collected through questionnaires which included 24 questions with seven items. To determine the impact and ranking theprinciples of organizational learning in performance of huma...

nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...

The increasing application of Information Technology (IT) in the area of economics and industrial activities, along with its major changes in organizations, have made the study of this technology in-evitable. This issue is becoming more important when we deal with SMEs, because of their specific conditions, traits and also their sensi-tivity to environmental changes. On the other hand, scientis...