the present study reports an analysis of response articles in four different disciplines in the social sciences, i.e., linguistics, english for specific purposes (esp), accounting, and psychology. the study has three phases: micro analysis, macro analysis, and e-mail interview. the results of the micro analysis indicate that a three-level linguistic pattern is used by the writers in order to cr...

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

Soilless culture (hydroponic) and timely supply of plants’ essential nutrients will increase their quantitative and qualitative performance. To assess the impact of N, K and Mg on yield and fruit quality of strawberry (Fragaria×ananasa cv. Sun Rise) an experiment was performed which included control treatment (no fertilizer application), two levels of urea (100 and 200 mg/L per pot), two levels...

The experiment was carried out to study pomochemical properties of twenty superior genotypes of apricot (Prunusarmeniaca L) during two consecutive growing seasons (2013-2014) in the Khalkhal valley, south of Ardabil province (Iran). Physical parameters (weight, flesh, skin and color) and chemical parameters (total soluble solids content and acidity) were evaluated using Principal Component Ana...

Chitosan in addition to antimicrobial properties is used as an edible coating for improvement storage life of various fruit and vegetables. Weight loss and fungal rot, are the main limiting factors in sweet pepper postharvest life. Therefore in this study the effects of chitosan at concentration of 0.5, 1, 1.5 and 2% were investigated on the quality preservation and fungal rot controlling of sw...

the thesis has been arranged into five chapters and mainly concerned with the baer-invariant of groups which is the generalization of the schur-multiplier with respect to the variety of groups. chapter one is devoted to collect some notation and background information which are needed in the next chapters. its also contains some important statements which will be generalized in this thesis. cha...