Half a century of Ramachandran plots.

The Historical continuity of the Great Khorasan and Indian subcontinent from the first century to the first half of the seventh century AH; a new approach in historical studies

The contiguity of the Indian subcontinent and Great Khorasan in the Islamic period has connected the political history of these two regions. According to the historical reports, the development of Islam in the subcontinent and formation of Muslims government in India originated in Khorasan political changes. Also, Indians were present in political and military arenas of some Islamic governments...

The Analysis of Monthly moisture advection changes in Iran’s atmosphere over the recent half-century

Half-Century Journey from Synthetic Organic Chemistry to Mathematical Stereochemistry through Chemoinformatics

My half-century journey started from synthetic organic chemistry. During the first stage of my journey, my interest in stereochemistry was initiated through the investigation on the participation of steric effects in reactive intermediates, cylophanes, strained heterocycles, and organic compounds for photography. In chemoinformatics as the next stage of the journey, I proposed the concept of im...

Important Lessons Learned From Nearly a Half-Century of Orthopedic Practice

“Those who cannot remember the past are condemned to repeat it” [1]. The famous quote from Hispanic American philosopher George Santayana reminds us of the critical importance of constantly reflecting on the most important lessons garnered from both our own personal experiences and those of our peers. In 49 years of academic orthopedic practice, I have frequently reflected on the most important...

Precipitation Trends Analysis in Southwest Asia during the Last Half Century

Precipitation is a climatic elements that have temporal - spatial distribution. In this research database of Global Precipitation Climatology Centre (GPCC) with a resolution 0.5×0.5 degree for 50 year is used, that was constituted with dimensions of 12800*600. Temporal data are on the columns and pixels (spatial data) located on the rows. The results show an increasing trend in spring and fall ...