Nicholas Callan - priest, professor and scientist

Professor Abass Alavi, Distinguished Medical Scientist.

Dr. Abass Alavi was born on March 15, 1938 in Tabriz, a city in Eastern Azerbaijan, north west province of Iran. After graduating from high school in 1957, he moved to Tehran and enrolled at Tehran University of Medical Sciences. Following graduation from the medical school in 1964, and as part of the military obligation, he served in small communities in the outskirts of Tehran. In 1966, he tr...

Professor David Y. Graham: A Brilliant Scientist and a Compassionate Mentor

 There is an enormous number of astounding scientists, who have made their mark in science. Very few of them also serve as a true mentor, ready to provide a helping hand to young researchers, especially those in developing countries, who must constantly struggle to remain optimistic. Professor David Y. Graham is one of these rare characters. He received his undergraduate degree from the U...

Tribute to Professor Keiichi Tanaka, a scientist and an artist.

We are gathered in Toronto, today, to render homage to Prof. Keiichi TANAKA, one of the most outstanding electron microscopists of our times. There are occasions, such as this, when the peers select one of their own to pay a tribute on their behalf, to a person who distinguished himself, in a certain field, by the continuous excellence of his lasting contributions. Actually, I feel more honor b...

Professor Gerald Westheimer FRS Australian optometry's pre-eminent vision scientist.

0.1 Callan-symanzik Equation

10 Renormalization Group The renormalization procedure in the last chapter has eliminated all UV-divergences from the Feynman integrals arising from large momenta in D = 4 − ε dimensions. This was necessary to obtain finite correlation functions in the limit ε → 0. We have seen in Chapter 7 that the dependence on the cutoff or any other mass scale, introduced in the regularization process, chan...