The aim of this study is to design a model based on the paradigm role of education management in the excellence of educational organizations in the twenty regions of Iran. Therefore, the mixed research method was used and data were collected in two quantitative and qualitative stages.In the first stage, interviews with 16 experts of railway training , practical implementation of ten commandme...

in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...

based on the latest records of typhlops vermicularis merrem, 1820 from iran, this species is distributed in the northern and southern regions of the country. in this study, new records of typhlops vermicularis are presented and it is shown that distribution range of this species is extended towards the eastern and western iran, and according to the new distribution map, it can be assumed that t...

Introduction: Due to the presence of extreme hazard sources and high intrinsic risk in refineries and process industry sectors, different layers of protection are being used to reduce the risk and avoid the hazardous events. Determining Safety Integrity Levels (SILs) in Safety Instrumented Systems (SISs) helps to ensure the safety of the whole process. Risk Graph is one of the most popular and ...

Background: One important goal of policymakers regarding economy in developed countries is to improve quality, standard and level of well-being in society. The purpose of this study was to provide a model that leads to improving the quality of public welfare in the country's governance system. Methods: This was a combined (qualitative-quantitative) research conducted in 2020. To collect data i...