investment in oil and gas upstream activities is very important for the exploration and development of oil and gas fields. different and various laws and regulations deal with the investment in upstream operations. by reviewing these various laws and regulations, this research paper tries to discuss to what extent these laws and regulations have created legal confident for foreign investment up...

nowadays soil erosion is considered as a serious threat to human's life and his welfare. when soil erosion not properly controlled, the fertility would gradually decrease. adoption of appropriate soil conservation practices along with socio-economic factors' assessment can be used to increase farmers' awareness and acceptance of soil conservation, and to diminish soil erosion dam...

Copyright © 2016, Infection, Epidemiology and Medicine; Tarbiat Modares University. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License, which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited Study the Association of Accessory Gene Regulator Typ...

Purpose: The menstrual cycle is used as a sign of women’s health. Objective of study is determining the current menstrual patterns of students in Gorgan –Northeast of Iran, and evaluation of affecting factors on the cycle. Material and Methods: The study participants included 106 college student, females aged 18-30 that filled a questionnaire to detect the menstrual pattern, affecting factors o...

1Department of Internal Medicine (Division of Pulmonary), Bushehr Medical Center Hospital, Bushehr University of Medical Sciences, Bushehr, Iran 2Department of Radiology, Bushehr Medical Center Hospital, Bushehr University of Medical Sciences, Bushehr, Iran 3Research Center of Gastroenterology and Hepatology (GRCGH), Golestan University of Medical Sciences, Gorgan, Iran 4The Persian Gulf Tropic...

abstract one of the most important sources of drinking and agricultural water needs is rivers. one of the oldest methods of getting water from rivers that still has the greatest use is the gravity intake. in this type of intake, due to the disproportionate velocity at the upstream and downstream mouth of intake, occur flow separation and following sedimentation at the upstream mouth. in this st...