October 4th, 2012

лошадь, диаграмма, Фейнман

Recent Progress in the Theory of Nuclear Forces

http://arxiv.org/abs/1210.0992 Название доклада (на 8 страниц) говорит само за себя. Краткий обзор истории, начиная с Юкавы, и нерешенные проблемы. Вот аннотация:
During the past two decades, it has been demonstrated that chiral effective field theory represents a powerful tool to deal with nuclear forces in a systematic and model-independent way. Two-, three-, and four-nucleon forces have been derived up to next-to-next-to-next-to-leading order (N3LO) and (partially) applied in nuclear few- and many-body systems---with, in general, a good deal of success. This may suggest that we are finally done with the nuclear force problem; but that would be too optimistic. There are still some pretty basic open issues that have been swept under rug and, finally, need our full attention, like the proper renormalization of the two-nucleon potential. Moreover, the order-by-order convergence of the many-body force contributions is at best obscure at this time.
лошадь, диаграмма, Фейнман

Ух ты, вот это мне в тему!!! A Quantum Mechanical Review of Magnetic Resonance Imaging

Обзор на 54 pages, 24 figures, 4 tables. Бегло пролистав, просто охреневаю, пардон май френч! http://arxiv.org/abs/1210.0946 
лошадь, диаграмма, Фейнман

Юбилей космической эры

Оригинал взят у lugermaxotto в Юбилей космической эры
Фрагмент помылен у faber_fortunae в Юбилей космической эры

Группа студентов Смоленского педагогического института следит за полётом первого спутника.
Странно люди проводят астрономические наблюдения...