data envelopment analysis (dea) measures the relative efficiency of a homogenous set of decision-making units (dmus) when multiple inputs and outputs are present. the deabased malmquist productivity index measuring the productivity change of dmus over time has proven itself to be a valid tool to compare group performance. however, in the previous models developed for this purpose, it was suppos...

background: in this study, measurement of indoor radon and its progeny levels was carried out in gas turbine power station in haryana ( india ), where natural gas is used as fuel. for comparison, the results of a study carried out in thermal power plant in haryana are also presented. radon being a ubiquitous air pollutant has global impact and its monitoring in the environment at work places is...

background: the objectives of this paper are three folds. first, an integrated framework for designing and development of the integrated health, safety and environment (hse) model is presented. second, it is implemented and tested for a large gas refinery in iran. third, it is shown whether the total ergonomics model is superior to the conventional ergonomics approach. this study is among the f...

introduction: educational environment is an important determinant of students’ behavior and its elements are associated with academic achievement and course satisfaction. the aim of this study was to determine students’expectations of the ideal educational environment. methods: this was a qualitative study with content analysis approach. using a theoretical sampling method, we selected eight st...

The city is alive with dynamic systems, where parks and urban green spaces have high strategic importance which help to improve living conditions. Urban parks are used as visual landscape with so many benefits such as reducing stress, reducing air pollution and producing oxygen, creating opportunities for people to participate in physical activities, optimal environment for children and decreas...