A Study of Anyon Statistics by Breit Hamiltonian Formalism

We study the anyon statistics of a $2 + 1$ dimensional Maxwell-Chern-Simons (MCS) gauge theory by using a systemmetic metheod, the Breit Hamiltonian formalism.Comment: 25 pages, LATE

Pennsylvania Folklife Vol. 18, No. 2

• The Swiss Bank House in Pennsylvania • Trance-Preaching in the United States • The Sleeping Preachers: An Historical Study of the Role of Charisma in Amish Society • A Central Chimney Continental Log House • The German Journalist and the Dunker Love-Feast • Christmas Customs: Folk-Cultural Questionnaire No. 10https://digitalcommons.ursinus.edu/pafolklifemag/1034/thumbnail.jp

Modeling of radiative - conductive heat transfer in compositing materials

A layer of composite material is investigated, which is heated one-sidedly with one-dimensional energy transfer accounting for thermal conductivity and radiation. A mathematical model is suggested for non-stationary coefficient thermophysical problem under radiative-conductive heat transfer in a material layer. Temperature dependencies of thermal capacity and thermal conductivity coefficient of composite radio-transparent material have been determined through numerical modeling by solving the coefficient reverse problem of thermal conductivity

Численное моделирование процесса магнитно-импульсной обработки осевого режущего инструмента в ANSYS

The purpose of this study is an analysis of the numerical simulation results of the magnetic-pulsed processing (MPP) of axis cutting tools using ANSYS. Practical recommendations for the choice of optimal MPP modes are developed on the basis of this analysis. The induction current distribution on the surface of a drill placed in an inductor was obtained using the Ansys Electronics Desktop (Maxwell) module. The time realization of the current pulse in the inductor corresponds to the shape of the experimentally measured pulse waveform. The magnetic pulse is generated by the unit MIU-2. According to the calculation, the magnetic field strength reaches the value h0,1 = 1.247 · 107 [A/m] at a depth of 0.1 mm from the drill surface. Two cases of drill positioning in the inductor are considered: full loading of the drill (the drill is installed on the inductor entire length) and half loading of the drill (the cutting edges are situated in the inductor center). The analysis results show that the density of the induction current has the highest value in the grove of the drill at full loading and in the region of cutting during the discharging in the inductor for the MPP cycle and drill cooling during the charging of the capacitor bank for the repeated MPP cycle) using the Ansys Transient Thermal module. The temperature distribution was obtained for the both options for the location of the drill inside the inductor. The result is that for reinforcing the side surface of the cutting tool (cutting band) the full loading option must be used. For reinforcing the cutting edges the half loading option is more efficient.Целью данного исследования является анализ результатов численного моделирования процесса магнитно-импульсной обработки (МИО) осевого режущего инструмента в среде ANSYS и выработка на их основе практических рекомендаций, связанных с выбором режимов МИО. С использованием модуля Ansys Electronics Desktop (Maxwell) получено распределение индукционных токов на поверхности сверла, помещенного в индуктор. Временная реализация импульса тока в индукторе соответствует форме экспериментально измеренного импульса, который генерируется установкой МИУ-2. Рассчитана напряженность магнитного поля, которая на глубине 0,1 мм от поверхности сверла достигает h0,1 = 1,247 · 107 [А/м]. Рассмотрены два случая позиционирования сверла в индукторе: полная загрузка сверла (сверло устанавливается на всю длину индуктора) и половинная загрузка сверла (режущие кромки находятся в центре). Анализ показал, что плотность индукционного тока имеет наибольшую величину в канавке сверла при полной загрузке и в области режущих кромок при половинной загрузке. С использованием модуля Ansys Transient Thermal: выполнено моделирование тепловых процессов для двух основных временных интервалов (нагрев сверла в процессе разряда в индукторе при МИО и остывание сверла во время заряда конденсаторной батареи для повторного цикла МИО). Получено распределение температуры для обоих вариантов расположения сверла внутри индуктора и сделан вывод, что для обработки боковой поверхности режущего инструмента (режущей ленточки) необходимо использовать вариант с полной загрузкой, а для обработки режущих кромок, более эффективной является половинная загрузка

Model of impact of pulsed magnetic field on titanium alloy product

На основе разработанной модели проведен анализ изменений фазового состава, которые происходят в поверхностных слоях заготовки, изготовленной из титанового сплава ТС4, при магнитно-импульсном упрочнении. Результаты анализа были обобщены, сделаны заключения о характерных особенностях обработки магнитно-импульсным упрочнением изделий из титанового слава при помощи плоского индуктора. Based on the developed model, an analysis of the change in a phase composition, which occur in the surface layers of the workpiece made of titanium alloy TC4 during magnetic-pulse hardening, was performed. The results of the analysis were summarized and conclusions about the characteristic features of the processing of MPH titanium alloy product with the help of a flat indicator were made

The evolution of the lepidosaurian lower temporal bar: new perspectives from the Late Cretaceous of South China

Until recently, it was considered axiomatic that the skull of lizards and snakes arose from that of a diapsid ancestor by loss of the lower temporal bar. The presence of the bar in the living New Zealand Tuatara, Sphenodon, was thus considered primitive, corroborating its status as a ‘living fossil’. A combination of new fossils and rigorous phylogeny has demonstrated unequivocally that the absence of the bar is the primitive lepidosaurian condition, prompting questions as to its function. Here we describe new material of Tianyusaurus, a remarkable lizard from the Late Cretaceous of China that is paradoxical in having a complete lower temporal bar and a fixed quadrate. New material from Jiangxi Province is more complete and less distorted than the original holotype. Tianyusaurus is shown to be a member of the Boreoteiioidea, a successful clade of large herbivorous lizards that were dispersed through eastern Asia, Europe and North America in the Late Cretaceous, but disappeared in the end-Cretaceous extinction. A unique combination of characters suggests that Tianyusaurus took food items requiring a large gape

МАГНИТОСТРИКЦИОННЫЙ МЕХАНИЗМ ОБРАЗОВАНИЯ МЕЛКОДИСПЕРСНОЙ СТРУКТУРЫ В СТАЛЬНЫХ ИЗДЕЛИЯХ ПРИ МАГНИТНО-ИМПУЛЬСНОМ ВОЗДЕЙСТВИИ

It is established that in magneto static fields, which can really be used in industrial equipment, the magnitude of electromagnetic energy is not sufficient for phase equilibrium changing. However, in pulse magnetic field, ones can obtain the changing of phase equilibrium for surface layer of ferromagnetic work material. The thickness of material layers is comparable with skin depth. It is shown, that the magnetic-pulse action on ferromagnetic sample surface provides conditions for formation of small-dispersed structure when the temperature approaches to the Curie temperature. In the presence of strong magnetic field, deformations of ferromagnetic regions arise due to magnetostriction, which are displaced relative to paramagnetic regions localized near the grain and domain boundaries. It leads to a disintegration of ferrite grains and to formation of an anisotropic structure since the regions with specific orientation of crystal planes are disintegrated by magnetostriction.Показано, что при магнитно-импульсном воздействии на ферромагнитный образец реализуются условия, способствующие образованию мелкодисперсной структуры при приближении температуры поверхности образца к температуре Кюри. При наличии сильного магнитного поля вследствие магнитострикции происходит деформация ферромагнитных участков, которые сдвигаются относительно парамагнитных областей, локализованных вблизи границ зерен и границ доменов. В результате возникающих механических напряжений может происходить дробление зерен. Магнитострикция приводит не только к измельчению зерен феррита, но и к образованию упорядоченной структуры, поскольку дроблению подвергаются участки с определенной ориентацией кристаллических плоскостей

A New Saurolophine Dinosaur from the Latest Cretaceous of Far Eastern Russia

Background: Four main dinosaur sites have been investigated in latest Cretaceous deposits from the Amur/Heilongjiang Region: Jiayin and Wulaga in China (Yuliangze Formation), Blagoveschensk and Kundur in Russia (Udurchukan Formation). More than 90% of the bones discovered in these localities belong to hollow-crested lambeosaurine saurolophids, but flat-headed saurolophines are also represented: Kerberosaurus manakini at Blagoveschensk and Wulagasaurus dongi at Wulaga. Methodology/Principal Findings: Herein we describe a new saurolophine dinosaur, Kundurosaurus nagornyi gen. et sp. nov. from the Udurchukan Formation (Maastrichtian) of Kundur, represented by disarticulated cranial and postcranial material. This new taxon is diagnosed by four autapomorphies. Conclusions/Significance: A phylogenetic analysis of saurolophines indicates that Kundurosaurus nagornyi is nested within a rather robust clade including Edmontosaurus spp. Saurolophus spp. and Prosaurolophus maximus, possibly as a sister-taxon for Kerberosaurus manakini also from the Udurchukan Formation of Far Eastern Russia. The high diversity and mosaic distribution of Maastrichtian hadrosaurid faunas in the Amur-Heilongjiang region are the result of a complex palaeogeographical history and imply that many independent hadrosaurid lineages dispersed without any problem between western America and eastern Asia at the end of the Cretaceous. © 2012 Godefroit et al.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Response of the ATLAS tile calorimeter prototype to muons

A study of high energy muons traversing the ATLAS hadron Tile calorimeter in the barrel region in the energy range between 10 and 300~GeV is presented. Both test beam experimental data and Monte Carlo simulations are given and show good agreement. The Tile calorimeter capability of detecting isolated muons over the above energy range is demonstrated. A signal to background ratio of about 10 is expected for the nominal LHC luminosity ($10^{34} cm^{-2} sec^{-1}$). The photoelectron statistics effect in the muon shape response is shown. The e/mip ratio is found to be $0.81 \pm 0.03$; the e/$\mu$ ratio is in the range 0.91 - 0.97. The energy loss of a muon in the calorimeter, dominated by the energy lost in the absorber, can be correlated to the energy loss in the active material. This correlation allows one to correct on an event by event basis the muon energy loss in the calorimeter and therefore reduce the low energy tails in the muon momentum distribution