objective: the aims of this study were to determine energy efficiency and co2 use pattern of grape production in zanjan province, iran by a non-parametric method of data envelopment analysis (dea). methods: initial data were collected using a face to face questionnaire from 42 orchards in abhar city of zanjan province which is one of the most important centers of grape production in iran. the d...

The paper presents an ACT-R model of task switching, which implements flexible mechanism of control over task rules, that adapts to the level of task change predictability. In predictable task switching situations, the model loads relevant task rules into an easily accessible focus of attention (simulated with an ACT-R goal buffer). However, when tasks change randomly, such strategy would lead ...

the present survey is a correlation study designed to determine extent and type of relation between mid-arm   circumference and weight in order to offer a scale for assumption of weight.   390 healthy, adults who are resident in tehran and between the ages 18-65 were selected from visitors at three   hospital censers at random. input accumulation was carried out by means of a questionnaire and ...

Background: In response to the need for diagnosis and treatment, medical radiation has been increasingly used worldwide. This study investigated the medical utilization of radiation-related diseases among radiological technologists (RTs) and factors that influence such diseases. Materials and Methods: Data were collected from the Taiwan National Health Insurance Research Database. A panel study...