نتایج جستجو برای: third century ad
تعداد نتایج: 436834 فیلتر نتایج به سال:
a r t i c l e i n f o Keywords: Gulf of Maine Seawater temperature seasonality Climate change Sclerochronology Arctica islandica Oxygen isotopes In this study, we use subannually resolved oxygen isotope values of fossil (dead-collected) and modern (live-caught) bivalve shells (Arctica islandica L.) from the northwestern Atlantic (Gulf of Maine, USA) to reconstruct past seasonal changes in seawa...
Hodud al-Ālam (Boundaries of the World), a geography book from the 3rd century AH/ AD 9th century is the first source that refers to the act of weaving carpets in Tabarestan, northern Iran. This book regards the Tabari carpet as a product of that region to the court of the Abbasid caliphs; however the oldest carpet of Tabarestan known is the Kelardasht carpet. There are four theories about the ...
Background: Provide a review of occupational medicine history in world and Iran Methods: Many books, papers and sites on the occupational medicine history were reviewed. Results: Occupational medicine have been shaped by the forces that shape work itself, social evolution, changing modes of production, shifting economic powers, and demographic changes in the workforce. Hippocrates emphasized ...
Although forms of dementia arising late in life had been identified by Kraepelin and his colleagues in the 1800s, it was not until 1907 that Alois Alzheimer identified the presenile form of dementia with unique neuropathologic features that now bears his name. Alzheimer described a 51year-old woman who presented with personality changes and soon developed progressively worsening memory loss, di...
The vegetation covering of a region has a direct correlation with climate. So if data is available for vegetation cover, the second variable (climate) can be easily predicted and in reverse. The dominant species in a region are indication of its climatic conditions and vice versa. Accordingly, this is of significance in the science of historical botany. Fortunately, from the first millennium A...
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