Philosophical and Methodological Basis of the Transdisciplinary Model of Socio-Cultural Risk Management

The article considers the range of methodological apparatus of philosophical and humanitarian orientation, applicable to the formation of a transdisciplinary model of socio-cultural risk management.В статье рассматривается спектр методологического аппарата философско-гуманитарной направленности, применимого для формирования трансдисциплинарной модели управления социокультурными рисками.Публикация подготовлена при поддержке Гранта Президента РФ «Трансдисциплинарная модель управления социокультурными рисками» (МК-240.2019.6).The publication was prepared with the support of the Grant of the President of the Russian Federation «Transdisciplinary model of socio-cultural risk management» (MK-240.2019.6)

Kinetics and mechanism of the methylation reactions of anilines with dimethylcarbonate

The paper investigates the mechanism of the reaction of methylation of primary anilines by the reagent “Green chemistry” dimethylcarbonate. The mathematical model of the description of change of concentration of substances which represents a problem of Cauchy is constructed. For temperature t=145 0C and speed constants are determined.The study was carried out with the financial support of the Russian Foundation for Basic Research in the framework of the research project No. 18-37-00015

Advances in Electronic-Nose Technologies Developed for Biomedical Applications

The research and development of new electronic-nose applications in the biomedical field has accelerated at a phenomenal rate over the past 25 years. Many innovative e-nose technologies have provided solutions and applications to a wide variety of complex biomedical and healthcare problems. The purposes of this review are to present a comprehensive analysis of past and recent biomedical research findings and developments of electronic-nose sensor technologies, and to identify current and future potential e-nose applications that will continue to advance the effectiveness and efficiency of biomedical treatments and healthcare services for many years. An abundance of electronic-nose applications has been developed for a variety of healthcare sectors including diagnostics, immunology, pathology, patient recovery, pharmacology, physical therapy, physiology, preventative medicine, remote healthcare, and wound and graft healing. Specific biomedical e-nose applications range from uses in biochemical testing, blood-compatibility evaluations, disease diagnoses, and drug delivery to monitoring of metabolic levels, organ dysfunctions, and patient conditions through telemedicine. This paper summarizes the major electronic-nose technologies developed for healthcare and biomedical applications since the late 1980s when electronic aroma detection technologies were first recognized to be potentially useful in providing effective solutions to problems in the healthcare industry

Thermal and hydraulic calculation in a model of industrial branched pipeline transporting a single-phase liquid flow

This paper proposes a system of differential equations that describes changes of pressure and temperature of a stationary liquid flow through straight, turning, and branched pipeline sections. We developed a program, using the proposed system of equations, that carries through hydraulic and thermohydraulic calculations, allows to choose diameter of various pipeline systems. The key feature of the program is the ability to solve monophasic problems such as: friction losses; local resistance losses; heat dissipation into the environment; flow distribution

Clusters of opportunity: results of research on educational effects of participation in the project “School for High School Students”

The objective of the research presented in this article is to study the opportunities for students, teachers, and administrative teams to take part in the project “School for High School Students”. The main research method is a survey conducted among students, teachers, and administrations of educational institutions of the city of Moscow taking part in the project “School for High School Students”. The survey data were analyzed with the help of content analysis (text analysis based on Zipf’s law). The data obtained as a result of the sampling of schools that were taking part in the project “School for High School Students” were analyzed in terms of opportunities for the main participants of educational relations. Substantive and infrastructure changes in the projects provide possibilities: for high schoolers — in terms of creating individual educational routes, forming a subjective position, professional and personal self-determination, trying out their potential profession, and choosing their career path; for teachers — in terms of professional development, acquiring new methodological experience, using new teaching frameworks, gaining experience of working with new equipment and electronic resources; for administrative teams — in terms of improvement of the quality of conditions, process, result, and management, namely, improvement of the school status, positive dynamics of students’ educational results, resourcing of the project, forming a motivating learning environment and environment for occupational trials, and networking interactions with educational and other organizations

The Melt of Sodium Nitrate as a Medium for the Synthesis of Fluorides

The preparation of NaLnF4 complexes, LnF3 (Ln = La, Ce, Y) rare earth binary fluorides, CaF2 and SrF2 alkali earth fluorides, as well as mixtures of these compounds from their nitrates dissolved in molten NaNO3 has been studied in order to select the ideal solvent for fluoride synthesis by spontaneous crystallization from flux. Sodium fluoride (NaF) was used as a fluorinating agent. The results of our experiments have confirmed that NaNO3 melt is one of the most promising media for precipitating said inorganic fluoride materials within a broad temperature range (300–500 °С). Also, in contrast with precipitation/co-precipitation from aqueous solutions, our syntheses have resulted in obtaining equilibrium phases only

Synthesis and down-conversion luminescence investigation of CaF<inf>2</inf>:Yb:Ce powders for photonics

© 2019 Elsevier B.V. Single-phase solid solutions based on calcium fluoride doped with ytterbium and cerium trivalent ions were synthesized by co-precipitation from aqueous solutions. According to scanning electron microscopy, the average particle size was 225 nm. Luminescence kinetics analysis has shown significant energy transfer from Ce3+ to Yb3+ under excitation at 266 nm. The lifetime of the Yb3+ luminescence in the Ce/Yb doped samples was higher in comparison to the samples having Pr/Yb double activation. At the same time, we have not been able to detect Ce3+ luminescence. Direct measurements of down-conversion Yb3+ luminescence quantum yield have been performed using an integrating sphere. The maximum quantum yield (5.6%) of ytterbium luminescence, upon 266 nm pumping, was recorded for the CaF2:Ce(0.1 mol%):Yb (10 mol%) sample

Synthesis and luminescence studies of CaF<inf>2</inf>:Yb:Pr solid solutions powders for photonics

© 2018 Elsevier B.V. Praseodymium- and ytterbium-doped calcium fluoride powder samples were prepared by co-precipitation from aqueous solutions followed by annealing at 600 °C. Phase and microstructure analyses of these fluorite-type solid solution samples were carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM), which have demonstrated the average particle size to be about 30 nm, ∼100 nm after drying at 45 °C and annealing at 600 °C, respectively. The fluorescence studies under 443 nm excitation in 3H4 – 3P2 band of Pr3+ ions allowed us to determine the optimal chemical compositions of CaF2:Yb:Pr samples with the high Pr3+->Yb3+ energy transfer efficiency exceeding 90% and down-conversion luminescence efficiency up to 50%. The optimal compositions are: Yb:Pr = 10.0:0.05; 10.0:0.1; and 5.0:0.05 mol%. This confirms that the energy transfer from praseodymium to ytterbium occurred via quantum cutting mechanism, and the optimal composition for highly efficient phosphor application appears to be CaF2:Yb(10.0 mol%):Pr(0.1 mol%)

Synthesis and down-conversion luminescence investigation of CaF<inf>2</inf>:Yb:Ce powders for photonics

© 2019 Elsevier B.V. Single-phase solid solutions based on calcium fluoride doped with ytterbium and cerium trivalent ions were synthesized by co-precipitation from aqueous solutions. According to scanning electron microscopy, the average particle size was 225 nm. Luminescence kinetics analysis has shown significant energy transfer from Ce3+ to Yb3+ under excitation at 266 nm. The lifetime of the Yb3+ luminescence in the Ce/Yb doped samples was higher in comparison to the samples having Pr/Yb double activation. At the same time, we have not been able to detect Ce3+ luminescence. Direct measurements of down-conversion Yb3+ luminescence quantum yield have been performed using an integrating sphere. The maximum quantum yield (5.6%) of ytterbium luminescence, upon 266 nm pumping, was recorded for the CaF2:Ce(0.1 mol%):Yb (10 mol%) sample

SYNTHESIS AND CHARACTERIZATION OF Bi22W5-ХMХO48- δ (M= Mn, Fe, Co)

The samples with general formula Bi22W5-xMxO48-δ (M= Mn, Fe, Co; х=0-0.2) have been synthesized by solid state method. It was found that the samples crystallize with cubic structure. Bi22W5-xCoxO48-δ has the highest values of electroconductivity