Minority black Olympic athletes in the 20th and early 21st centuries

Internal Factors of Insecurity in the Persian Gulf

Since a long time ago, the Persian Gulf security has always formed the focus of attention of regional states and the world big powers. During the final years of the 20th and early 21st centuries given the changes and transformations occurring after the US war and Iraq invasion, the significance of the region from security perspective increased. As a result, several conventions and special dialo...

Incidence of Low Back Injuries Among Iranian Athletes in 12 Disciplines of Olympic Sports

Objective: The present research aimed to determine the prevalence and incidence rate of low back pain and injury in 12 Olympic sports athletes presenting to the injury surveillance system of the Sports Medicine Federation of Iran. Methods: A retrospective analysis was conducted on the data of athletes from the injury surveillance system of the Sports Medicine Federation of Iran, for three year...

Estimation of the Greenland ice sheet surface mass balance during 20th and 21st centuries

Non-Iranian shu'ubiyya movements in early Islamic centuries

The Iranian Shuchr(chr(chr('39')39chr('39'))39chr(chr('39')39chr('39')))ubiyyah was large-scale and diverse movement, but the Shuchr(chr(chr('39')39chr('39'))39chr(chr('39')39chr('39')))ubiyya movements in the Islamic world was not limited to the Iranians. The Umayyad caliphate focused on the Arab element in political, social, and economic affairs, and it was caused dissatisfaction among other ...

Properties of natural organisms and its use in technological architecture

This research aimed at identifying natural organisms and their properties in the technological samples of contemporary architecture. The main questionswere: "Which properties of natural organisms are effective on the technological works of contemporary architecture?" and "How much do they affect?"This descriptive-analytic research was conducted using archival method to access the theoretical...