there are two major theories of measurement in psychometrics: classical test theory (ctt) and item-response theory (irt). despite its widespread and long use, ctt has a number of shortcomings, which make it problematic to be used for practical and theoretical purposes. irt tries to solve these shortcomings, and provide better and more dependable answers. one of the applications of irt is the as...

Background and Objective: Identification of potential risks in laboratories and trying to create safe conditions for the staff is very important from different aspects. The main objective of this study was to evaluate the potential risks in the laboratories of three research centers affiliated to Iranian Fisheries Science Research Institute. Materials and Methods: In order to assess and clas...

Background: Industries like steel, along with wealth generation and economic development, create many environmental problems, such as air, water, and soil pollution and waste generation. Since environmental protection is considered one of the pillars of sustainable development, solutions should be adopted that minimize environmental hazards, and promote the existing industry towards sustainable...

Introduction: work-related accidents impose irreparable hurt on the national capital. It is necessary to take a series of preventive measures before the occurrence to preserve and protect the human force and reduce accidents. The current study aimed to check safety contradiction using the FMEA method and determine protection indicators of safety performance in the overhaul project.  Materials ...

why some learners are willing to communicate in english, concurrently others are not, has been an intensive investigation in l2 education. willingness to communicate (wtc) proposed as initiating to communicate while given a choice has recently played a crucial role in l2 learning. it was hypothesized that wtc would be associated with language learning orientations (llos) as well as social suppo...

the importance of writing as a complex skill in applied linguistics has drawn the attention of many researchers to evaluate textbooks in order to help learners gain self-sufficiency and autonomy in the field of language use and communication. investigations have shown that developments in textbooks evaluation can promote the quality of pedagogies and consequently the learning. this study attemp...