introduction: length of stay is one of the most important and most practical indices used in hospitals today and presents the performance and efficiency of the hospitals. on the other hand, hierarchical analysis technique, one of the group decision making techniques, is utilized to determine priorities. therefore, this study was conducted to identify the factors affecting length of stay in alza...

several processes have been proposed for natural gas liquefaction due to the vast utilization of lng as a reliable and relatively easy to use fuel. even though the merits and demerits of different process have been studied, a dearth of comprehensive technical and economical comparative investigation of these methods makes further broad examination a necessity. this article is presented to addre...

‎in this paper, we present a two-stage model for ranking of decision making units (dmus) using interval analytic hierarchy process (ahp). since the efficiency score of unity is assigned to the efficient units, we evaluate the efficiency of each dmu by basic dea models and calculate the weights of the criteria using proposed model. in the first stage, the proposed model evaluates decision making...

population growth, industrial pollution and high-energy consumption, cause the release of significant amounts of pollutants in the environment. power plants play an important role in the release of pollutants such as sulfur dioxide, nitrogen oxides, and carbon dioxide. if the necessary measures in the field of prevention and control do not be implemented, human health and other living creatures...

locating landfills in urban areas is one of the most important issues in urban planning because of the effect on economy, ecology, and environment, therefore the right management and principled landfilling of solid waste is the major concern all over the world especially in the developed countries. in locating landfills, different criteria should be considered. in the present study, locating si...

nurses have long been relied as the major labor force in hospitals. featured with complicated and highly labor-intensive job requirement, multiple pressures from different sources was inevitable. success in identifying stresses and accordingly coping with such stresses is important for job performance of nurses, and service quality of a hospital. purpose of this research is to identify the dete...