introduction: nowadays ionizing radiation has a considerable contribution in medical diagnostic and treatment. using ionizing radiation is increasing rapidly, so biological effects of ionizing radiation should be considered more. x-rays in the range of diagnostic radiology have hazardous effects and risks that are defined as random effects. these effects obey the lnt hypothesis that occur at lo...

background: a cross-sectional analytic method was used to assess health and safety risks that really matter in restaurants of universities and hospitals in the gaza strip, palestine.  materials and methods: a 40-item questionnaire was completed by workers in all university and governmental hospital restaurants in the gaza strip. another 30-item questionnaire was completed by university students...

introduction: gail model is one of the most important models for the evaluation of breast cancer risk between us white females. according to genetic diversity, there is a possibility of affecting the efficiency of the gail model in risk assessment of breast cancer among iranian populations. in this study, the gail model efficiency in specifying the risk of breast cancer in iranian population wa...

background development of complications during gynecologic laparoscopic surgery depends on many factors such as history of previous laparotomies. this factor usually increases the veres and first trocar complications. objectives in this study, we compared all operative complications between the patients with and without previous abdominal surgery. patients and methods all operative complication...

Background & Aims of the Study: Petrochemical industry is an important industry in the economic development of the country that causes employees have exposure with several kinds of contamination. The aim of this study was Semi-quantitative assessment of the health risk of occupational exposure to chemical materials and investigation of spirometry in...

Safety distance has already been a main measurement for the hazard control of chemical installations interpreted to mean providing space between the hazardous installation and different types of targets. But, the problem is how to determine the enough space. This study considers the application of quantitative risk assessment to evaluating a compressed natural gas station site and to identi...

background: repeated applications of animal manure as fertilizer are normal agricultural practices in malaysia that may release veterinary antibiotics to environment from treated animals. methods: environmental risk assessment (era) on 5 commonly used antibiotics and one hormone in malaysian broiler farm was calculated using the ratio of measured environmental concentration (mec) and predicted ...

Multiple software products often exist on the same server and therefore vulnerability in one product might compromise the entire system. It is imperative to perform a security risk assessment during the selection of the candidate software products that become part of a larger system. Having a quantitative security risk assessment model provides an objective criterion for such assessment and com...