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

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

Hybrid Simulation of a Radioisotope Neutron Source based on a Mixture of Stable Crystals of Am and Be Oxides

In this paper, a procedure was proposed for calculating the neutron yield and the spectrum of the Am-Be source for different granular size of the source mixture. With the combined use of the calculation codes SOURCES-4C and MCNP5, computational models of the source differing in the structure of the mixture and the energy spectrum were presented. By calculating of neutron transport, an analysis of the appearance and loss of neutrons in the sources and in the steel shell of the source was carried out. As a result of the work, it became clear how the grain size of the source mixture affects the neutron yield

Assessment of physicians’ and medical majors’ knowledge of asthma basics: current results of the ASSA-II study

The analysis of an anonymous survey of physicians and senior medical students was used in the research The study revealed both an average level of basic knowledge in asthma etiology and pathogenesis among the physicians and senior medical students and the significant differences in their knowledge regarding clinical picture and treatment of asthm

To the Radula Morphology and Reproductive Anatomy of the Genus Biwamelania(Mollusca : Cerithioidea : Pleuroceridae : Semisulcospirinae)

Far East Branch of Russian Academy of SciencesPromoting Environmental Pesearch in Pan-Japan Sea Area : Young Researchers\u27 Network, Schedule: March 8-10,2006,Kanazawa Excel Hotel Tokyu, Japan, Organized by: Kanazawa University 21st-Century COE Program, Environmental Monitoring and Prediction of Long- & Short- Term Dynamics of Pan-Japan Sea Area ; IICRC(Ishikawa International Cooperation Research Centre), Sponsors : Japan Sea Research ; UNU-IAS(United Nations University Institute of Advanced Studies)+Ishikawa Prefecture Government ; City of Kanazaw

Magnetic phase diagram of the frustrated S=1/2 chain magnet LiCu_2O_2

We present the results of the magnetization and dielectric constant measurements on untwinned single crystal samples of the frustrated S=1/2 chain cuprate LiCu_2O_2. Novel magnetic phase transitions were observed. A spin flop transition of the spiral spin plane was observed for the field orientations H||a,b. The second magnetic transition was observed at H~15 T for all three principal field directions. This high field magnetic phase is discussed as a collinear spin-modulated phase which is expected for an S=1/2 nearest-neighbor ferromagnetic and next-nearest-neighbor antiferromagnetic chain system

Effect of heat treatment of the alumina powder on the microstructure and properties of coatings

The alumina powder was treated at a high temperature (1000°C). Dense (porosity of less than 2%), solid (1280 ± 30 HV0.3) and wear-resistant coatings based on heat-treated alumina powder were obtained by a multi-chamber detonation sprayer on the steel substrate. The microstructure, microhardness and the wear resistance of the alumina coatings were investigate

The Role of the Juvenile Commission and the Protection of Their Rights in the Child Protection System

The article examines the role of the Commission for Juvenile Affairs and the protection of their rights as a coordinating body of the subjects of the system of prevention of neglect and delinquency of minors.В статье рассматривается роль комиссии по делам несовершеннолетних и защите их прав, как координирующего органа субъектов системы профилактики безнадзорности и правонарушений несовершеннолетних

Seven new species of Rhynchobombyx Aurivillius, 1909 from Congolian lowland forests (Lepidoptera: Lasiocampidae)

Seven new species of the Afrotropic Lasiocampidae genus Rhynchobombyx are described and illustrated: Rh. gavinfilippone Prozorov, Saldaitis & Müller sp. n., Rh. avadomenicarocchio Prozorov, Saldaitis & Müller sp. n., Rh. julianjameseaton Prozorov, Saldaitis & Müller sp. n., Rh. anthonychristophereaton Prozorov, Saldaitis & Müller sp. n., Rh. nicolasroberteaton Prozorov, Saldaitis & Müller sp. n., Rh. arijakefriend Prozorov, Saldaitis & Müller sp. n., Rh. madisonellafriend Prozorov, Saldaitis & Müller sp. n. All species originate from the poorly studied Congolian lowland forests ecoregion of Congo and Democratic Republic of the Congo. Lectotype and paralectotype of Rh. nasuta Aurivillius, 1909 are designated here, the species type locality is specified