Towards the assignment for the 41S04 ^1S_0 meson nonet

The strong decays of the $\pi(2070)$, $\eta(2010)$, $\eta(2100)$, $\eta(2190)$, and $\eta(2225)$ as the $4 ^1S_0$ quark-antiquark states are investigated in the framework of the $^3P_0$ meson decay model. It is found that the $\pi(2070)$, $\eta(2100)$, and $\eta(2225)$ appear to be the convincing $4 ^1S_0$ $q\bar{q}$ states while the assignment of the $\eta(2010)$ and $\eta(2190)$ as the $4 ^1S_0$ isoscalar states is not favored by their widths. In the presence of the $\pi(2070)$, $\eta(2100)$, and $\eta(2225)$ being the members of the $4 ^1S_0$ meson nonet, the $4 ^1S_0$ kaon is phenomenologically determined to has a mass of about 2153 MeV. The width of this unobserved kaon is expected to be about 197 MeV in the $^3P_0$ decay model.Comment: 15 pages, 5 figures, version accepted for publication in Physical Review

Waveguide laser formed in YAG: Nd3+ crystal by femtosecond laser inscription

A technique of direct writing of depressed cladding waveguides by a tightly focused, femtosecond laser beam in laser crystals has been developed. A laser based on a depressed cladding waveguide in a Neodimium doped YAG crystal has been demonstrated for the first time

Laser processing effect on magnetic properties of amorphous wires

A study was conducted to observe the laser processing effects on the magnetic properties of amorphous wires. Weekly interacting heterogeneous structures with different magnetic properties were formed by the local annealing by argon laser. Favourable changes were observed due to the creation of local stresses and structural interfaces

Influence of boric anhydride upon the physical and chemical properties of ferrosilicon slag

The authors study the influence of boric anhydride upon the physical and chemical properties of slag in the manufacture of ferrosilicon. It is established that adding boric anhydride to the slag changes its refractory quality and its viscosity and eases pouring slag and metal. Slags with optimal composition and properties are described

Стандартные образцы антибактерильных веществ утвержденного типа: принцип разработки

The authors of the publication have described the basic principles of the procedure of defining metrological characteristics of certified reference materials (hereinafter referred to as CRMs) of antibacterial substances that are being developed. CRMs of antibacterial substances are intended for certification of measurement procedures and accuracy control of measurement results. CRMs can be used for graduation, calibration of measuring instruments if their metrological and technical characteristics comply with the procedures of graduation and calibration of measuring instruments, as well as determination of antibiotic sensitivity of pathogenic microorganisms and authenticity of active substances in pharmaceutical drugs.Авторами работы изложены основные принципы процедуры установления метрологических характеристик, разрабатываемых стандартных образцов антибактериальных веществ утвержденного типа. Стандартные образцы антибактериальных веществ утвержденного типа предназначены для аттестации методик измерений и контроля точности результатов измерений. Стандартные образцы могут быть использованы для градуировки, калибровки средств измерений при соответствии метрологических и технических характеристик стандартного образца требованиям методик градуировки, калибровки средств измерений, а также определения чувствительности патогенных микроорганизмов к антибиотикам и подлинности действующего вещества в лекарственных средствах

Technical assistance, neo-colonialism or mutual trade? The experience of an Anglo/Ukrainian/Russian social work practice learning project

Since the collapse of the Soviet Union there has been a steady stream of Western consultants ready to work in Eastern Europe and Russia and share professional and academic expertise and experience. Social work, unknown as a discrete discipline or profession in the Soviet Union, has been a growth area with funding from a variety of sources to help promote East-West partnerships.Social work theory and practice emphasises critical appraisal of policy and embraces issues of power, discrimination and oppression. Social work educators should therefore be especially alert to the complex ethical questions which these kinds of collaborations raise, and adept at finding practical solutions or workable compromises. This article explores these ethical and political issues with reference to a project to develop social work practice learning in a Russian oblast' (region). The project was an ambitious partnership of British, Ukrainian and Russian educators, involving numerous Russian social work and related agencies, and four Russian universities and colleges in one oblast'. The authors use a series of vignettes to help the reader achieve insights into these East-West transactions. The article concludes with a discussion of different interpretations of these dealings, using three prisms: technical assistance, neo-colonialism and mutual trade

Стандартный образец тилозина тартрата

To date, antibiotics are often used in the treatment of infectious diseases in medicine and veterinary medicine, as well as growth promoters in animal husbandry. The uncontrolled use of antibiotics leads to antibiotic residues in food products that are easily transmitted to humans through food chains. Due to these undesirable effects, as well as in connection with the circulation of substandard and counterfeit medicinal products, it is necessary to control the quality of medicinal products, as well as monitor the food safety of animal products by determining the content of drug residues using reference materials (RMs).The aim of this research was to develop a CRM for the composition of tylosin tartrate.In the course of the research, a method for preparing the initial RM was tested and successfully implemented, a critical analysis of methods for measuring the content of tylosin tartrate was carried out, and the choice of the HPLC method as the main method for quantitative determination of the certified value of the measured quantity (mass fraction of tylosin) was justified. The disadvantages of the microbiological method and the titrimetry method as alternative methods were shown. In accordance with RMG 93–2015 and GOST ISO Guide 35–2015, the standard uncertainty of the RM certified value from the characterization method, heterogeneity and instability of the material was estimated. The expanded uncertainty of the certified value was calculated. The result of the work performed was the approval of a new type of the CRM for the composition of tylosin tartrate GSO 11632 2020.Normalized metrological characteristics: the mass fraction of tylosin is 800–1100 µg/mg, the relative expanded uncertainty at k = 2, P= 0.95 is 6%. The CRM is stored in sealed ampoules separately from food and feed in a dry and dark place at a temperature from plus 4 °C to minus 18 °C, the shelf life of the CRM is 4 years.The practical significance of the results obtained makes it possible to expand the possibility of certification of measurement methods and control of the accuracy of the measurement results of the mass fraction of tylosin in veterinary medicinal products, food and food raw materials, animal feed, and environmental objects. The CRM can also be used to identify tylosin in medicinal products and to determine the susceptibility of pathogens to tylosin.Достаточно часто в современном мире применяют антибиотики для лечения инфекционных заболеваний в медицине и ветеринарии, а также в качестве стимуляторов роста в животноводстве. Бесконтрольное применение антибиотиков приводит к появлению остатков антибиотиков в пищевых продуктах, которые легко передаются человеку по пищевым цепочкам. Из-за этих нежелательных эффектов и в связи с оборотом недоброкачественных и контрафактных лекарственных препаратов необходимо контролировать качество лекарственных препаратов, а также проводить мониторинг пищевой безопасности продукции животноводства путем определения содержания остатков лекарственных препаратов в ней посредством применения стандартных образцов (СО).Целью настоящего исследования стала разработка СО утвержденного типа состава тилозина тартрата.В ходе выполнения исследования апробирована и успешно реализована методика подготовки исходного материала СО, проведен критический анализ методов измерений содержания тилозина тартрата, обоснован выбор метода ВЭЖХ в качестве основного метода количественного определения аттестованного значения измеряемой величины (массовой доли тилозина). Показаны недостатки микробиологического метода и метода титриметрии, рассмотренных в качестве альтернативных методов. В соответствии с РМГ 93–2015 и ГОСТ ISO Guide 35–2015 оценена стандартная неопределенность аттестованного значения СО от метода характеризации, от неоднородности и от нестабильности материала. Рассчитана расширенная неопределенность аттестованного значения. Результатом выполненных работ явилось утверждение нового типа СО состава тилозина тартрата ГСО 11632–2020.Нормированные метрологические характеристики: массовая доля тилозина 800–1100 мкг/мг, относительная расширенная неопределенность при k = 2, Р= 0,95 равна 6%. СО хранится в запаянных ампулах, отдельно от продуктов питания и кормов, в сухом, защищенном от света месте при температуре от +4 °С до -18 °С, срок годности СО 4 года.Практическая значимость полученных результатов позволяет расширить возможность аттестации методик измерений и контроля точности результатов измерений массовой доли тилозина в лекарственных средствах ветеринарного применения, в продуктах питания и продовольственном сырье, кормах для животных, объектах окружающей среды. СО может также использоваться для определения подлинности тилозина в лекарственных средствах и определения чувствительности патогенных микроорганизмов к тилозину

Multipoint Schur algorithm and orthogonal rational functions: convergence properties, I

Classical Schur analysis is intimately connected to the theory of orthogonal polynomials on the circle [Simon, 2005]. We investigate here the connection between multipoint Schur analysis and orthogonal rational functions. Specifically, we study the convergence of the Wall rational functions via the development of a rational analogue to the Szeg\H o theory, in the case where the interpolation points may accumulate on the unit circle. This leads us to generalize results from [Khrushchev,2001], [Bultheel et al., 1999], and yields asymptotics of a novel type.Comment: a preliminary version, 39 pages; some changes in the Introduction, Section 5 (Szeg\H o type asymptotics) is extende

Differential diagnostic utilities of combined testing for islet cell antibody, glutamic acid decarboxylase antibody, and tyrosine phosphatase antibody

Background. Beta-cell antibody tests are used for the differential diagnosis of diabetes mellitus. They permit to discriminate between the type 1 diabetes (T1D) and non-autoimmune diabetes types. To choose an appropriate test for ruling in or ruling out the T1D a physician needs to know how conclusive test results are. The most powerful estimate of test conclusiveness is its likelihood ratio (LHR). The higher LHR of a positive result (LHR+), the more posttest probability of T1D; the lower LHR of a negative result (LHR), the less posttest probability of T1D. Aims. To compare conclusiveness of single and combined tests for antibodies to islet cells (ICA), glutamate decarboxylase (GADA), and tyrosine phosphatase IA-2 (IA-2A), and to evaluate posttest probabilities of T1D at various pretest probabilities. Methods. All antibodies were tested in parallel in 169 children and adolescents with a new-onset T1D, and in 169 persons without this disease. ICA, GADA, and IA-2A were determined by indirect immunofluorescence, radioimmune assay, and ELISA, respectively. LHR+ and LHR were calculated with the MedCalc Statistical Software. Posttest T1D probabilities were calculated from Bayes theorem-based equation. Results. Among single tests, an ICA test had the greatest LHR+ and the smallest LHR, and consequently was the most reliable either for ruling in or ruling out the T1D. Among test combinations, an ICAGADA combination had the greatest LHR+ and was the most suitable for T1D confirmation. The triple combination ICAGADAIA-2A had the smallest LHR and was the most suitable for T1D exclusion. Conclusions. In the differential diagnosis of diabetes, the most appropriate test for ruling in the T1D is the double combination ICAGADA. With both antibodies positive, this combination provides the highest posttest T1D probabilities at any pretest probability. The most appropriate test for ruling out the T1D is the triple combination ICAGADAIA-2A. With all three antibodies negative, this combination provides the lowest posttest T1D probabilities