he letters that Vincent Van Gogh wrote to his younger brother, Theo, document this painter’s thoughts over a period of 20 years with the same brilliance and clarity of his canvases. As a contribution to literature, these letters stand on the same level as Leonardo da Vinci’s notebooks and far above Benvenuto Cellini’s autobiography. They reveal that Van Gogh was stifled by depression often thro...

We were greatly saddened to hear the news of Professor Fereydoun Malekzadeh's death at age of 79 in September 9, 2012. Professor Malekzadeh was a distinguished and highly respected Iranian Microbiologist and a member of the editorial board of the Iranian Biomedical Journal since October 1997. He was born in 1933 in city of Tabriz in Province of Azarbaijan, Iran. After graduated from high school...

The issue o f how and when Charles Darwin became an evolutionist has long fascinated his biographers. Such historical curiosity is hardly surprising; for, without his own conversion, the orthodox young Darwin who once intended to become a clergyman would never have gone on to inspire the scientific revolution that now bears his name. Intimately associated with Darwin's conversion is the story o...

uncertainty associated with mixing models is often substantial, but has not yet been fully incorporated in models. the objective of this study is to develop and apply a bayesian-mixing model that estimates probability distributions of source contributions to a mixture associated with multiple sources for assessing the uncertainty estimation in sediment fingerprinting in zidasht catchment, iran....

This brief biography is consecrated to a scientist who has spent more than sixty years of his life on the study of Iranian plants and made a significant contribution to our knowledge of botany in Iran. Dr. Musa Iranshahr was born on 7 December 1923 in Tabriz (Iran). He did his elementary and high school where he was born. After graduating from Faculty of Agriculture, TehranUniversity, he receiv...

Early in Principia Mathematicaz Russell presents an argument that “z‘the author of Waverleyz’ means nothing”, an argument that he calls a “deWnite proofz”. He generalizes it to claim that deWnite descriptions are incomplete symbols having meaning only in sentential context. This Principiaz “proofz” went largely unnoticed until Russell reaUrmed a near-identical “proofz” in his philosophical auto...