development of industrial activities around the world, especially during the last decades has resulted in environmental pollution rising. soil pollution is always considered as one of the most dangerous environmental threat for human’s life, fauna and flora. heavy metals such as arsenic are potential hazardous elements in generating the soil pollution. these materials could be entered into the ...

This paper presents the results of a literature search for publications containing failure rates and repair times, based on operational experience, for distribution system components that are critical to the reliability of a distribution system. Furthermore, component failure rates found are compared with the conclusions drawn from a previously conducted literature search.

  Introduction: Tracheal stenosis is normally caused by trauma, infection, benign and malignant tumors, prolonged intubation or tracheostomy. The best treatment for tracheal stenosis is resection and anastomosis of trachea. Yet the major surgical complication of tracheal surgery is postoperative stenosis. The goal of this paper is to study the result of tracheal stenting as a replacement therap...

schizophrenia is one of the most severe psychiatric disorders and 25% of the patients need long term hospitalization. they have somatic illness that may be ignored and lead to death. considering the lack of information regarding the causes of death in schizophrenic patients, the aim of this study was to determine the main causes of death in the long term hospitalized schizophrenic patients in s...

Iran is recognized as an endemic area for lung hydatidosis. Surgical removal of some hydatid cysts may have setious morbid consequences. To determine the characteristics of these special cysts, a retrospective survey was carried out on patients admitted to Modarres Hospital in Tehran between 1989 and 1998. We have found that ruptured, bilateral, lung located, and giant cysts (> ] 0 cm) caus...

one of the most important issues concerned with causation is that of ultimate cause. the ultimate in philosophy is used in two senses; one means: “something to which movement is directed”; the other means: “something for which movement takes place.” there are three theories with regand to “what is ultimate cause?” 1. the external existence of the ultimate of act; 2. the conception of the ultima...

in this scientific research, magnesium oxide (mgo) nanoparticles were synthesized from magnesium nitrate and ammonium solutions via microwave@sol-gel process. the structure and the morphology of the synthesized nanoparticles has been identified and characterized by x-ray diffraction (xrd), n2-bet (brunauer-emmett-tell), scanning electron microscopy (sem) and fourier transform infrared (ftir) te...

OBJECTIVE  To conduct a nationwide study of associations between removal of all ovarian tissue versus conservation of at least one ovary at the time of hysterectomy and important health outcomes (ischaemic heart disease, cancer, and all cause mortality). STUDY DESIGN AND SETTING  Retrospective analysis of the English Hospital Episode Statistics database linked to national registers of depriva...

introduction: tracheal stenosis is normally caused by trauma, infection, benign and malignant tumors, prolonged intubation or tracheostomy. the best treatment for tracheal stenosis is resection and anastomosis of trachea. yet the major surgical complication of tracheal surgery is postoperative stenosis. the goal of this paper is to study the result of tracheal stenting as a replacement therapy ...

The traditional theory of the just war comprises two sets of principles, one governing the resort to war ( jus ad bellum) and the other governing the conduct of war ( jus in bello). The two sets of principles are regarded, in Michael Walzer’s words, as “logically independent. It is perfectly possible for a just war to be fought unjustly and for an unjust war to be fought in strict accordance wi...