Leon Ehrenpreis was an outstanding world class mathematician and a wonderful, warm person. I had a privilege to consider myself his friend for the last two decades. It is hard to do justice to his manifold mathematics and personality, but I will try to at least add some recollections to this tribute volume. Leon Ehrenpreis has been one of my mathematical heroes for about 40 years. I first encou...

Coronaviruses are an association of viruses which lead sicknesses in mammals and birds. The Common symptoms that affect humans respiratory tract infections, fever, headache, etc.In this review, we highlight the development coronaviruses recent two decade, include simpleacute syndrome (2002-2003), middle east (2012) coronavirus disease 2019 (2019-2020).

during the recent decades, substantial changes are made in the borders and contents of physiology as a basic course for the students in medicine. here some strategies are presented to preserve the classical and integrative approaches in teaching physiology, while these approaches extent our knowledge to molecular, sub-cellular and cellular levels.

While global warming is mostly conceptualized in terms of increases mean temperature, changes the most extreme conditions encountered often have disproportionate impacts. Here, a measure amplification defined as change highest yearly temperature (denoted TXx), representing heat, minus that 80th percentile daily high (Tmax80), which represents typical summer conditions. Based on ERA5 reanalysis,...

neo-ottomanism in recent decades has been among the most controversial political debates in related academies and literature. frequent references to it by turkish officials in recent years, multiplied its importance in international relations. the term obviously owes its significance to the ottoman empire era, and accordingly, a sufficient analysis on the challenges of the empire during its las...