Four heavy metals were measured in forty-nine topsoil samples collected fromagricultural areas in Siakh-Darengoun, Iran. The goals were to investigate soil spatialdistribution patterns of metals; their potential ecological risk; and sources. The Hakansonpotential ecological risk index and index of geo-accumulation (Igeo) were used forevaluating t...

every year, many accidents leading to physical injuries in kindergartens, indicates that a very large percentage of them are related to the safety concerns and lack of hygiene in these places. families, due to their busy life style and working hours and also children needs of preschool education, are searching to find most suitable kindergartens for their children. selecting a kindergarten with...

OBJECTIVE To understand the potential fracture mechanism of sternal wires, we collected extracted stainless steel sternal wires from patients with sternal dehiscence following open-heart operations. Surface alterations and fractured ends of sternal wires were inspected and analyzed. METHODS Eight fractured and 12 non-fractured wires extracted from five patients (closure method: figure-of-eigh...

conclusions while rural living has a protective effect on nafld, marriage may be a potential risk factor for this condition. results we found that nafld had an inverse association with rural living in men (or = 0.513, 0.422 - 0.622, p value < 0.001) and women (or = 0.431, 0.345 - 0.539, p value < 0.001). furthermore, we determined that nafld had a direct association with marriage status for men...

vitamin d has long been speculated to reduce the risk of multiple sclerosis (ms). however, its role in development and modulating the course of ms has yet to be clarified. to date, there is no scientific evidence for the use of vitamin d as monotherapy for ms in clinical practice and perplexities still exist on potential disadvantages of vitamin d intake. we hypothesize that vitamin d may be ef...

risk management is one of the nine project management processes, which provides positive results and minimizes the probability and consequences of adverse effects in the project.  in this article a zero-one linear programming model with multiple objectives is used to characterize the potential risks. the proposed model has two main objectives. the first objective is the minimization of the expe...