Strange nucleon form factors in the perturbative chiral quark model

We apply the perturbative chiral quark model at one loop to calculate the strange form factors of the nucleon. A detailed numerical analysis of the strange magnetic moments and radii of the nucleon, and also the momentum dependence of the form factors is presented.Comment: 18 pages, 6 figure

Медийная монополия и политическая конкуренция

The article assesses the impact of information TNCs on the political process and public opinion in Western countries. In the global context relationships of media giants are characterized by on the one hand, as a highly competitive, and by another - as a concerted effort to capture and regulate the information market and planting of basic ideological tenets of neoliberalism. Without advertising support socially-oriented media would disappear from media space, and freedom of information is increasingly becoming a utopia. The era of globalized information begins protecting the interests of big business and ruling circles in the West, and imposing a single world view on key problems of the contemporary world order. New information technologies, electronic media, blogs break the monopoly of information media TNCs and facilitate the development of democracy and civil society.Статья посвящена влиянию информационных ТНК на политические процессы и общественное сознание в западных странах. В глобальном контексте отношения медиагигантов характеризуются, с одной стороны, как остроконкурентные, а с другой, - как согласованные действия по захвату и регулированию информационного рынка и насаждению базовых идеологических установок неолиберализма. Без рекламной поддержки социально ориентированные СМИ исчезают из медийного пространства, и свобода информации все больше превращается в утопию. Наступает эпоха «глобализованной информации», защищающей интересы крупного бизнеса и правящих кругов Запада и навязывающей всему миру единое видение ключевых проблем современного миропорядка. Новые информационные технологии, электронные СМИ, блоги разрушают информационную монополию медийных ТНК и способствуют развитию демократии и гражданского общества

Final NOMAD results on nu_mu->nu_tau and nu_e->nu_tau oscillations including a new search for nu_tau appearance using hadronic tau decays

Results from the nu_tau appearance search in a neutrino beam using the full NOMAD data sample are reported. A new analysis unifies all the hadronic tau decays, significantly improving the overall sensitivity of the experiment to oscillations. The "blind analysis" of all topologies yields no evidence for an oscillation signal. In the two-family oscillation scenario, this sets a 90% C.L. allowed region in the sin^2(2theta)-Delta m^2 plane which includes sin^2(2theta)<3.3 x 10^{-4} at large Delta m^2 and Delta m^2 < 0.7 eV^2/c^4 at sin^2(2theta)=1. The corresponding contour in the nu_e->nu_tau oscillation hypothesis results in sin^2(2theta)<1.5 x 10^{-2} at large Delta m^2 and Delta m^2 < 5.9 eV^2/c^4 at sin^2(2theta)=1. We also derive limits on effective couplings of the tau lepton to nu_mu or nu_e.Comment: 46 pages, 16 figures, Latex, to appear on Nucl. Phys.

Desempenho do inhame (taro) em plantio direto e no consórcio com crotalária, sob manejo orgânico.

Estudaram-se os efeitos do plantio direto em cobertura morta de aveia-preta e do consórcio com Crotalaria juncea, em sistema orgânico de produção de inhame, em ensaio na EE de Nova Friburgo(Pesagro-Rio), região serrana do estado do Rio de Janeiro. Utilizouse o delineamento de blocos ao acaso com quatro repetições, em esquema fatorial 2 x 2, onde os tratamentos corresponderam ao: modo de plantio (direto ou convencional) e modo de cultivo (monocultivo ou consórcio com crotalária). O cultivo consorciado com a leguminosa promoveu maior altura nas plantas do inhame, assim como reduziu a queima de folhas pelos raios solares. A população infestante de ervas espontâneas foi mais efetivamente controlada com a combinação entre consórcio e plantio direto. Nenhum dos tratamentos influenciou a produtividade do inhame, que foi considerada satisfatória, indicando o potencial do manejo orgânico adotado