Introduction: Regular implementation of quality control (QC) program in diagnostic X-ray facilities may affect both image quality and patient radiation dose due to the changes in exposure parameters. Therefore, this study aimed to investigate the status of randomly selected conventional radiographic X-ray devices installed in radiology centers of Great Khorasan Province, Iran, to produce the da...

The Rab1-Nielsen formulas are used to make predictions for solar pond operations for four locations situated in different solar insulation zones in Iran. The inputs to the computer program for determining the temperature variation at the bottom of the pond are the total insulation (corrected for cloudiness). ambient temperature, insolating layer thickness, convection layer thickness and load. T...

patients and methods this retrospective study used a database of a cr ward of a hospital in iran. the demographic and clinical information of 574 patients participating in the cr program from april 2005 through april 2010 were analyzed. in order to determine the predictors of anxiety, binary logistic regression was performed. results after adjustment for gender, age and education, the results s...

We propose a form of input and output for functional languages that is in a sense orthogonal to the actual computation: certain input and output directives can be added to a completed, fully working program text, and they do neither disturb referential transparency nor necessitate to change the types of the program text. The input and output directives change the order of evaluation as little a...

A program is described which calculates the thermal stability and the denaturation behaviour of double-stranded DNAs and RNAs up to a length of 1000 base pairs. The algorithm is based on recursive generation of conditional and a priori probabilities for base stacking. Output of the program may be compared directly to experimental results; thus the program may be used to optimize the nucleic aci...

This paper introduces a signal monitoring program developed with a view to helping electrical engineering students get familiar with sensors with digital output. Because the output of digital sensors cannot be simply monitored by a measuring instrument such as an oscilloscope, students tend to have a hard time dealing with digital sensors. The monitoring program runs on a PC and communicates wi...

the paper examines for the first time the foreign exchange intervention policy in foreign exchange market of iran. and in this framework, the study designs and simulates the foreign exchange intervention model in iran. in the first section, the paper shows that the injection of oil revenues directly to economy and also the absence of potent structure of output are inclusively caused the central...