The Riemann Surface of a Static Dispersion Model and Regge Trajectories

The S-matrix in the static limit of a dispersion relation is a matrix of a finite order N of meromorphic functions of energy $\omega$ in the plane with cuts $(-\infty,-1],[+1,+\infty)$. In the elastic case it reduces to N functions $S_{i}(\omega)$ connected by the crossing symmetry matrix A. The scattering of a neutral pseodoscalar meson with an arbitrary angular momentum l at a source with spin 1/2 is considered (N=2). The Regge trajectories of this model are explicitly found.Comment: 5 pages, LaTe

Magnetic and microwave properties of (Ni,Co)Fe2O4-ferroelectric and (La,Ca,Sr)MnO3-ferroelectric multilayer structures

Structural, magnetic and ferromagnetic resonance characterization studies have been performed on lay-ered ferromagnetic-ferroelectric oxides that show strong magnetoelectric coupling. The samples contained thick films of ferrites or substituted lanthanum manganites for the ferromagnetic phase and lead zirconate titanate for the ferroelectric phase, and were sintered high temperatures. Results indicate defect free ferrites, but deterioration of manganite parameters due to diffusion at the interface and accounts for poor magnetoelectric coupling in manganite-PZT samples

Modeling of liquid flow in surface discontinuities

Polymer composite and metallic materials have found wide application in various industries such as aviation, rocket, car manufacturing, ship manufacturing, etc. Many design elements need permanent quality control. Ensuring high quality and reliability of products is impossible without effective nondestructive testing methods. One of these methods is penetrant testing using penetrating substances based on liquid penetration into defect cavities. In this paper, we propose a model of liquid flow to determine the rates of filling the defect cavities with various materials and, based on this, to choose optimal control modes

High-accuracy redshift measurements for galaxy clusters at z < 0.45 based on SDSS-III photometry

© 2015, Pleiades Publishing, Inc. A new method for measuring the redshifts of galaxy clusters based on photometric SDSSIII data is presented. Highly accurate photo-z measurements for red-sequence galaxies using machine learning techniques on a training sample of luminous red BOSS LOWZ galaxies allow the redshifts of clusters at z norm = 0.011. The accuracy of the proposed method has been estimated on galaxy clusters from the 400d catalog

No Sommerfeld resummation factor in e+e- -> ppbar ?

The Sommerfeld rescattering formula is compared to the e+e- -> ppbar BaBar data at threshold and above. While there is the expected Coulomb enhancement at threshold, two unexpected outcomes have been found: |G^p (4M_p^2)|= 1, like for a pointlike fermion, and moreover data show that the resummation factor in the Sommerfeld formula is not needed. Other e+e- -> baryon-antibaryon cross sections show a similar behavior near threshold.Comment: 9 pages, 6 figure

Конверсия природного газа для совместных производств метанол-водород, метанол-аммиак

In this work the requirements are shown for conversion branches of co-productions of methanol-hydrogen and methanol-ammonia. Analysis of existing methods of natural gas conversion was carried out. Using steam conversion and combined one, consisting of steam and steam-hydrogen conversion was shown to be expedient. Analysis of pipe-still heaters and mine reactors for natural gas conversion was carried out. Designs of reactors for natural gas conversion are offered.В работе приведены требования, предъявляемые к отделениям конверсии совместных производств метанол-водород, метанол-аммиак. Проведен анализ существующих методов ко-версии природного газа. Показано, что в совместных производствах целесообразно исполь-зовать паровую конверсию и комбинированную, состоящую из паровой и парокислородной конверсий. Проведен анализ трубчатых печей и шахтных реакторов конверсии природного газа. Предложены конструкции реакторов конверсии природного газа

Совместные производства в химической промышленности

In work the estimation of the basic sources of hydrocarbonaceous raw materials is made. The basic productions of the chemical industry using as raw materials synthesis gas, received by natural gas conversion are listed. Productions which can be aggregated in joint flow diagrammes are shown. Classification of co-productions of the chemical industry is offered.В работе проведена оценка основных источников углеводородного сырья. Перечислены основные производства химической промышленности, использующие в качестве сырья синтез-газ, полученный конверсией природного газа. Показаны производства, которые можно объединить в совместные технологические схемы. Предложена классификация совместных производств химической промышленности

Features of sexual behavior of adolescent boys and their awareness of reproductive health in modern conditions

The article defines a high level of sexual activity and assesses the standard of reproductive behavior of adolescents in modern society. The low level of awareness of 15-17-year-old boys in the field of reproductive health and the correlation between the levels of awareness of reproductive health and motivation for its preservation were revealed. The necessity of development of new forms and methods of health education in the formation of motivation for health-saving behavior in the field of reproductive health in adolescent boys.В статье определён высокий уровень половой активности и дана оценка стандарту репродуктивного поведения юношей подросткового возраста в современном обществе. Выявлены низкий уровень информированности юношей 15-17 лет в области репродуктивного здоровья и корреляция между уровнями осведомленности в вопросах репродуктивного здоровья и мотивацией на его сохранение. Определена необходимость разработки новых форм и методов санитарно-просветительской работы в формирования мотивации на здоровьесберегающее поведение в области репродуктивного здоровья у юношей-подростков

Electroproduction, photoproduction, and inverse electroproduction of pions in the first resonance region

Methods are set forth for determining the hadron electromagnetic structure in the sub-$N\bar{N}$-threshold timelike region of the virtual-photon ``mass'' and for investigating the nucleon weak structure in the spacelike region from experimental data on the process $\pi N\to e^+e^- N$ at low energies. These methods are formulated using the unified description of photoproduction, electroproduction, and inverse electroproduction of pions in the first resonance region in the framework of the dispersion-relation model and on the basis of the model-independent properties of inverse electroproduction. Applications of these methods are also shown.Comment: The revised published version; Revtex4, 18 pages, 6 figure