High-Field Low-Frequency Spin Dynamics

The theory of exchange symmetry of spin ordered states is extended to the case of high magnetic field. Low frequency spin dynamics equation for quasi-goldstone mode is derived for two cases of collinear and noncollinear antiferromagnets.Comment: 2 page

First record of the terrestrial predatory leech, Orobdella kawakatsuorum Richardson, 1975 (Clitellata, Hirudinea, Erpobdelliformes), from Moneron Island, Sakhalin Oblast, Russia

The terrestrial predatory leech of the genus Orobdella Oka, 1895 is recorded for the first time from Moneron Island, which is located southwest of Sakhalin, Russia. Morphological characteristics of the Moneron Orobdella clarify its taxonomic identification as O. kawakatsuorum Richardson, 1975, which is indigenous to Hokkaido Island in the Japanese Archipelago. The occurrence data extends the northernmost range of the genus Orobdella and shows that the leech fauna is shared between Moneron Island and Hokkaido

Triplet spin resonance of the Haldane compound with interchain coupling

Spin resonance absorption of the triplet excitations is studied experimentally in the Haldane magnet PbNi2V2O8. The spectrum has features of spin S=1 resonance in a crystal field, with all three components, corresponding to transitions between spin sublevels, being observable. The resonance field is temperature dependent, indicating the renormalization of excitation spectrum in interaction between the triplets. Magnetic resonance frequencies and critical fields of the magnetization curve are consistent with a boson version of the macroscopic field theory [Affleck 1992, Farutin & Marchenko 2007], implying the field induced ordering at the critical field, while contradict the previously used approach of noninteracting spin chains.Comment: 7 pages, 9 figure

Организация Исламская Конференция в трансформирующемся мире

The paper addresses the following issues: the evolution of the goals and objectives of the OIC in the context of the transformation of the world order after the Cold War, the impact of temporary structures established a unipolar world the activities of trans-regional cooperation among the institutions of the Islamic world. The article traced such trends as the beginning of the formation of a polycentric world and the intensification of regional associations of small and medium-sized countries, the political trend of consolidation in the OIC against the heterogeneity of its member countries, an attempt to "modernizing" the OIC in order to enhance its effectiveness and credibility in the international arena and the ongoing process of reform. Author notes the desire of the OIC to become a center of influence in Muslim world, as well as increased contact with the individual and collective actors in international relations. The article also discussed the motives and goals of Russia's accession to the OIC in the status of observer and prospects of their interaction.В статье рассматриваtтся следующие эволюция целей и задач деятельности ОИК в контексте трансформации миропорядка после окончания холодной войны; воздействие временно установившейся конструкции однополярного мира на деятельность институтов трансрегионального взаимодействия стран исламского мира. Автор анализирует новый Устав организации, позиции ОИК по таким острым проблемам современного мира, как реформирование системы международных отношений и ООН, противодействие терроризму, урегулирование конфликтов, предотвращение распространения ОМУ, «диалог цивилизаций». В статье даётся характеристика основных направлений Десятилетнего плана действий ОИК на 2006—2016 годы, который представляет собой отражение международной повестки дня, предлагаемой мусульманскими странами? обсуждается место религиозно-цивилизационной составляющей в деятельности ОИК, отмечается усиление данного направления в ответ на «исламофобию». Подводя итоги, автор отмечает стремление ОИК превратиться в центр влияния, представляющий мусульманский мир, а также расширение контактов с индивидуальными и коллективными субъектами международных отношений

The Wear Resistance of the Nanocomposite Coatings Obtained by the Cumulative- Detonation Device

Nanocomposite coatings based on Ti, O, C and H were deposited on aluminium samples by using the cumulative-detonation equipment. The nanocomposite coatings were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM) with diffraction, X-ray phase analysis, hardness measurements and tribotests. It was established that the wear of nanocomposite coatings based on Ti, O, C and H less than to the wear of material of the substrate. For the nanocomposite coating which were formed from the hydrogenated titanium powder was recorded the lowest wear and coefficient of friction. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3515