background: medical x-rays are the largest man-made source of public exposure to ionizing radiation. it is important to avoid conditions where the amount of radiation used is more than that needed for the procedure. materials and methods: the entrance skin exposure (ese) measurement was conducted for quality control of x-ray machines and survey of operator’s experimental techniques. the eses we...

introduction in radiography, dose and image quality are dependent on radiographic parameters. the problem is caused from incorrect use of radiography equipment and from the radiation exposure to patients much more than required. therefore, the aim of this study was to implement a quality-control program to detect changes in exposure parameters, which may affect diagnosis or patient radiation do...

We describe recent advances in theories and architecture that support performance guarantees needed for quality of service networks. We start with deterministic computations and give applications to integrated services, differentiated services, and playback delays. We review the methods used for obtaining a scalable integrated services support, based on the concept of a stateless core. New prob...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background : schizophrenia requires a large share of medical resources due to its early onset and chronic and severe nature. compliance therapy is a therapy specifically designed to improve concordance with treatment for those with major mental illnesses. the aim of present study was to determine whether compliance therapy...

Program quality represents the most significant part of software quality control that assures all characteristics of software products to satisfy the user’s explicit and implicit needs. Though software processes have to be improve to enhance software quality. In this paper we address the problems of software products at the source code level, and deal with those problems by using a coding stand...

IEEE 802.16e Broadband Wireless Access (BWA) technology is one of the most promising technologies for broadband access and has many applications. In order to meet the requirements of diverse multimedia services, it is necessary to provide quality of service (QoS) guarantee. Call Admission control plays an important role in QoS provisioning for wireless communication systems [1–2]. However, IEEE...

With the recent development of embedded system technology, automation of train control system software is being promoted. Software for safety-critical systems like the train control system software has to deal with the hazards identified by safety analysis in order to make the system safe, risk-free and fail-safe. However, systematic efforts to verify the safety of software have been rarely per...