Ab initio Studies of the Possible Magnetism in BN Sheet by Non-magnetic Impurities and Vacancies

We performed first-principles calculations to investigate the possible magnetism induced by the different concentrations of non-magnetic impurities and vacancies in BN sheet. The atoms of Be, B, C, N, O, Al and Si are used to replace either B or N in the systems as impurities. We discussed the changes in density of states as well as the extent of the spatial distributions of the defect states, the possible formation of magnetic moments, the magnitude of the magnetization energies and finally the exchange energies due to the presence of these defects. It is shown that the magnetization energies tend to increase as the concentrations of the defects decreases in most of the defect systems which implies a definite preference of finite magnetic moments. The calculated exchange energies are in general tiny but not completely insignificant for two of the studied defect systems, i.e. one with O impurities for N and the other with B vacancies.Comment: 8 pages, 10 figures, submitted to Phys. Rev.

Negative phenomena in social sphere of miners' towns and settlements during transition to market economy (1992-1999)

The authors of the paper deal with preconditions, dynamics, substance and characteristics of negative phenomena in social sphere of miners’ towns and settlements under market transformations. Both common and local social problems of coal-mining regions are shown gradually, as well as reasons for their growth and decline. Specific facts emphasizing hard living conditions of population in miners’ towns and settlements are submitted. The authors think they were much worse than at the end of soviet period. The correlation of social problems and high protest activity is considered. The conclusion is drawn that financial conditions of miners were hard because the state didn’t influence on economic situation in the country and implement restructuring of coal-mining industry. They didn’t have an opportunity to solve all socially significant problems and the state couldn’t provide them with a mechanism of support. Poverty and unemployment were key problems of miners. On one hand, they facilitated protest activity. On the other hand, they restrained it, because miners and their families were exposed to risk to obtain no assistance for solution of their social-economic problems. That is why protests of miners were chaotic, local and caused different response of the society to them

Political causes and factors influencing protests of miners in Russia (1992-1999)

The paper provides identification of political causes and factors of miner protest campaigns in the post-soviet Russia. The following research methods have been applied: contrastive-comparative analysis of literature on historic, sociological, political science, philosophic and economic issues; the method of statistical processing of the information; historical-typological analysis and generalization of documents in force and archival materials; the method of historical simulation. The authors gradually identified the most relevant political causes and factors affecting the development of miner protest campaigns in 1992–1999. Their interdependence on economic and socio-cultural aspects of phenomenon under consideration is also revealed. A comparative analysis with the “perestroika” period (1989–1991) was carried out. The authors made a conclusion that socio-political and socio-economic processes in coal mining regions were highly dependent on the policy of the federal center. The «experimental» nature of reforms in coal mining industry was not supported by additional political powers of leaders in coal mining territories, as the result, the policy was far behind economy and the social sphere of miners. Regional and local authorities were in the conditions of natural (market) selection; therefore, they spent most of their time keeping their political positions by any means, without any attempts to solve the problems in miner towns and settlements

Influence of ZrO2 modifier and Mo precursor on the state of active component in MoO3/Al2O3 catalysts

The effects of precursor and the method of support modification on the properties of supported metathesis catalysts for reaction of ethylene and trans-butene-2 into propylene are considered. The objects of the research are the catalyst comprising γ-Al2O3-supported molybdenum oxide as well as the modified alumina-based supports. The Mo precursors used is shown to significantly affect the state of the supported component. The distribution and morphology of the particles of active component inside the pores of the support differ for the ZrO2-modified samples prepared by impregnation and wet mixing methods

Еврейская община США и Суэцкий кризис, 1956-1957 гг.

This article examines an important stage in the prehistory of the formation of the Israeli lobby in the United States associated with the Suez Crisis of 1956–1957. This crisis demonstrated that the Jewish community in the United States was not a coherent and well-organized group capable to defend Israel’s interests and to dictate them to the American government. The Jewish diaspora was unable to help David Ben-Gurion’s government to achieve several important goals. First, Dwight Eisenhower’s administration flatly refused to provide strong guarantees of Israel’s security. Second, the United States refused to guarantee prevention of Israeli territory from raids of Palestinian guerrillas (fedayeen) from the Gaza Strip. The possibilities of the Jewish community to somehow influence the policy of the Eisenhower’s government were extremely limited by weak organizational forms of the community, by lack of real leverage over the policy of the Republican administration, and by the specific features in the policy of the 34th US President administration. At the same time, the leaders of the Jewish diaspora did not allow their disagreements between themselves and the State of Israel to become apparent publicly. The Suez crisis contributed to the establishment of mechanisms for interaction between the Jewish community and the US government. Later, this experience will form the basis for the formation of the Israeli lobby in the United States.В данной статье исследуется важный этап предыстории формирования израильского лобби в Соединенных Штатах, связанный с Суэцким кризисом 1956–1957 гг. Этот кризис продемонстрировал, что еврейская община в США вовсе не была сплоченной и хорошо организованной группой, способной отстаивать интересы Израиля и тем более диктовать их американскому правительству. Еврейская диаспора не смогла помочь правительству Д. Бен-Гуриона добиться нескольких важных целей. Во-первых, администрация Д. Эйзенхауэра наотрез отказалась предоставлять твердые гарантии безопасности Израиля. Во-вторых, Соединенные Штаты отказались брать на себя гарантии недопущения набегов палестинских партизан (федайинов) на израильскую территорию из сектора Газа. Возможности самой общины как-то повлиять на политику правительства Д. Эйзенхауэра были крайне ограничены и слабыми организационными формами общины, и отсутствием реальных рычагов воздействия на политику республиканской администрации, и особенностью политики администрации 34‑го президента США. В то же время лидеры еврейской диаспоры не позволили, чтобы их внутренние разногласия и разногласия с Государством Израиль проявились публично. Суэцкий кризис способствовал налаживанию механизмов взаимодействия еврейской общины с властными структурами США. Этот опыт ляжет в основу формирования израильского лобби в Соединенных Штатах

REFRACTORY OF WELL-DIFFERENTIATED THYROID CANCER TO THE TREATMENT WITH RADIOACTIVE IODINE

Resistance of well-differentiated distant metastases to radioactive iodine treatment severely deteriorate survival prognosis of patients. Chemotherapy (doxorubicin and combinations) and retinoid acid analoques (isotretinоin, roaccutan) implimentation did not allow to recommend them as a therapy of choice. Effectiveness of several multikinase inhibitors (vandetanib, sorafenib, sunitinib) was confirmed in phase II clinical trials. In result of phase III clinical trial of sorafenib (reported on ASCO’2013, Chicago, USA) its therapeutic efficacy in patient with iodine-refractory well-differentiated thyroid cancer was affirmed

Influence of the photon - neutrino processes on magnetar cooling

The photon-neutrino processes $\gamma e^{\pm} \to e^{\pm} \nu \bar \nu$, $\gamma \to \nu \bar \nu$ and $\gamma \gamma \to \nu \bar \nu$ are investigated in the presence of a strongly magnetized and dense electron-positron plasma. The amplitudes of the reactions $\gamma e^{\pm} \to e^{\pm} \nu \bar \nu$ and $\gamma \gamma \to \nu \bar \nu$ are obtained. In the case of a cold degenerate plasma contributions of the considering processes to neutrino emissivity are calculated. It is shown that contribution of the process $\gamma \gamma \to \nu \bar \nu$ to neutrino emissivity is supressed in comparision with the contributions of the processes $\gamma e^{\pm} \to e^{\pm} \nu \bar \nu$ and $\gamma \to \nu \bar \nu$. The constraint on the magnetic field strength in the magnetar outer crust is obtained.Comment: 8 pages, LaTeX, 2 PS figures, based on the talk presented by D.A. Rumyantsev at the XV International Seminar Quarks'2008, Sergiev Posad, Moscow Region, May 23-29, 2008, to appear in the Proceeding