On the localization of discontinuities of the first kind for a function of bounded variation

Methods of the localization (detection of positions) of discontinuities of the first kind for a univariate function of bounded variation are constructed and investigated. Instead of an exact function, its approximation in L2(-∞,+∞) and the error level are known. We divide the discontinuities into two sets, one of which contains discontinuities with the absolute value of the jump greater than some positive Δmin; the other set contains discontinuities satisfying a smallness condition for the value of the jump. It is required to find the number of discontinuities in the former set and localize them using the approximately given function and the error level. Since the problem is ill-posed, regularizing algorithms should be used for its solution. Under additional conditions on the exact function, we construct regular methods for the localization of discontinuities and obtain estimates for the accuracy of localization and for the separability threshold, which is another important characteristic of the method. The (order) optimality of the constructed methods on the classes of functions with singularities is established. © 2013 Pleiades Publishing, Ltd

Right to the city: Youth's view to live in the city

The article represents possibilities and problems of realization of the right to the city of youth in Yekaterinburg. According to the H. Lefebvre' concept,the article states that the next generation is aimed at appropriation of surrounding environment through changing it. By using questionnaires,there were 750 students and working youth interrogated,as well as there were 25 standard interviews with young citizens. The research results showed that young people mostly prefer cultural or recreational usage of urban spaces during the stability period. Youth as an active and dynamic social community acts as a carrier of protest sentiments. These moods become actual in cases of realizations of any administrative decisions directed to privatization of public spaces or affecting the interests of young generation. Materials suggest that the period of transition from consumption to appropriation and changing of urban spaces is observed. The Do-It-Yourself movement is becoming the instrument of Transition. © Published under licence by IOP Publishing Ltd.The reported study was funded by RFBR and Sverdlovsk region, project number 20-411-660012

Development of a strategic management system based on realizing the potential of integrated entity

© 2015, Mediterranean Center of Social and Educational Research. All rights reserved. The article proves that to implement a social-oriented regional development model it is necessary to apply the key competences concept for the system of cluster strategic management in real economy. The cluster performance system for consumer goods industry is updated by including social efficiency index in investment projects alongside technical-and economic ones. The article also provides an analysis of public and private partnership forms involving consumer industry clusters and reveals the way cluster development level influences the regional development social indexes

Organizational forms and methods of production management control

© 2015, Mediterranean Center of Social and Educational Research. All rights reserved. The article offers methodological approaches to the management control system. The given work also identifies its place in control system on the basis of result-oriented method and differentiates between management control and operational control. On the other hand, the notion of system itself presupposes a need for monitoring and feedback to provide the system’s livelihood. Control becomes a function which combines all the other management functions. In terms of consistency control is an indispensable mechanism to supervise the basic management process, consisting in making managerial decisions. The article estimates financial control over performance level

An Amperometric Sensor Based on Tin Dioxide and Cetylpyridinium Bromide Nanoparticles for the Determination of Vanillin

© 2018, Pleiades Publishing, Ltd. Abstract: Voltammetric characteristics of vanillin are determined using electrodes modified with tin dioxide nanoparticles dispersed in surfactants of various nature in the Britton–Robinson buffer solution. The best characteristics are observed for a glassy carbon electrode modified by a dispersion of SnO2nanoparticles in cationic cetylpyridinium bromide (SnO2–CPB/GCE). The electrode is characterized by cyclic voltammetry and electrochemical impedance spectroscopy. A fourfold increase in the effective surface area of SnO2–CPB/GCE and a significant decrease in charge transfer resistance are shown in comparison with a GCE. The electrooxidation of vanillin proceeds irreversibly with the participation of two electrons and two protons and is controlled by the diffusion of the analyte. A sensor based on a SnO2–CPB/GCE was developed to determine vanillin; it functions under conditions of differential pulse voltammetry. The analytical ranges for vanillin are 0.10–100 and 100–500 µM with the limits of detection and quantification 20 and 67 nM, respectively. The developed sensor is selective to vanillin in the presence of inorganic ions, saccharides, ascorbic acid, and a number of phenolic compounds. The sensor is used for the determination of vanillin in perfumes for household chemicals and vanilla essential oils. The results are in good agreement with the data of gas chromatography

Periodic Bursts of Coherent Radio Emission from an Ultracool Dwarf

We report the detection of periodic (p = 1.96 hours) bursts of extremely bright, 100% circularly polarized, coherent radio emission from the M9 dwarf TVLM 513-46546. Simultaneous photometric monitoring observations have established this periodicity to be the rotation period of the dwarf. These bursts, which were not present in previous observations of this target, confirm that ultracool dwarfs can generate persistent levels of broadband, coherent radio emission, associated with the presence of kG magnetic fields in a large-scale, stable configuration. Compact sources located at the magnetic polar regions produce highly beamed emission generated by the electron cyclotron maser instability, the same mechanism known to generate planetary coherent radio emission in our solar system. The narrow beams of radiation pass our line of sight as the dwarf rotates, producing the associated periodic bursts. The resulting radio light curves are analogous to the periodic light curves associated with pulsar radio emission highlighting TVLM 513-46546 as the prototype of a new class of transient radio source.Comment: 12 pages, 3 figures, accepted for publication in ApJ Letter

325 MHz VLA Observations of Ultracool Dwarfs TVLM 513-46546 and 2MASS J0036+1821104

We present 325 MHz (90 cm wavelength) radio observations of ultracool dwarfs TVLM 513-46546 and 2MASS J0036+1821104 using the Very Large Array (VLA) in June 2007. Ultracool dwarfs are expected to be undetectable at radio frequencies, yet observations at 8.5 GHz (3.5 cm) and 4.9 GHz (6 cm) of have revealed sources with > 100 {\mu}Jy quiescent radio flux and > 1 mJy pulses coincident with stellar rotation. The anomalous emission is likely a combination of gyrosynchrotron and cyclotron maser processes in a long-duration, large-scale magnetic field. Since the characteristic frequency for each process scales directly with the magnetic field magnitude, emission at lower frequencies may be detectable from regions with weaker field strength. We detect no significant radio emission at 325 MHz from TVLM 513-46546 or 2MASS J0036+1821104 over multiple stellar rotations, establishing 2.5{\sigma} total flux limits of 795 {\mu}Jy and 942 {\mu}Jy respectively. Analysis of an archival VLA 1.4 GHz observation of 2MASS J0036+1821104 from January 2005 also yields a non-detection at the level of < 130 {\mu}Jy . The combined radio observation history (0.3 GHz to 8.5 GHz) for these sources suggests a continuum emission spectrum for ultracool dwarfs which is either flat or inverted below 2-3 GHz. Further, if the cyclotron maser instability is responsible for the pulsed radio emission observed on some ultracool dwarfs, our low-frequency non-detections suggest that the active region responsible for the high-frequency bursts is confined within 2 stellar radii and driven by electron beams with energies less than 5 keV.Comment: 11 pages, 5 figures, submitted to A

The system of educating pre-service teachers to implement civic education in schools

© 2015, Mediterranean Center of Social and Educational Research. All rights reserved. Russia is undergoing difficult time changes in social development and radical changes that cause ambiguous consequences in social sentiments, behavioral practices and values of younger generation. In this regard, one of the socio-political challenges of Russia at the present moment is formation of civic society. This article concerns the development of the preservice teacher readiness to implement civic education of younger generation. The primary result of the article is the developed by the authors system of future teachers’ training for implementation of civic education among future students. The article submissions may be useful for school teachers, teachers of vocational education institutions, as well as for the preservice teachers

Deformation Behavior under Static and Cyclic Tension of Polymer Grafts without and after Modification by RGD Peptides

The structure, mechanical properties, and deformation behavior under static and cyclic tension of biofunctionalized biodegradable vascular grafts based on polyhydroxybutyrate/valerate and polycaprolactone were studied. It is shown that the modification gives rise to an almost twofold decrease of the elongation at break as well as the ultimate strength. It is shown that under cyclic loading the modification of grafts results in decreasing cyclic durability by more than twice. In doing so, the level of deforming stress decreases to a much lesser extent and is practically inferior to that for unmodified material. The analysis of principal strain [epsilon]1 and [epsilon]2 component distribution patterns in grafts of both types is carried out while the reason for the observed changes is discussed

The causes of death of HIV-Infected subjects in Lomonosov district of the Leningrad region, Russia, in 1999–2011

Aim – to analyze causes of death of HIV infected subjects died in Lomonosov District of the Leningrad Region, Russia, in 1999-2011. Materials and Methods. A retrospective analysis of 118 autopsy results of all HIV-infected patients who died in hospitals of Lomonosov district of the Leningrad region, as well as those delivered to the autopsy department from homes or streets in 1999–2011. Results. Males were 76%, the middle age – 32,1±4,3 years. The HIV-infection was the cause of death in 53 subjects (49%). Tuberculosis was the major postmortem diagnosis in this group of patients (85%). Due to other diseases or have died a violent death 29 (27%) and 27 (24%) individuals correspondingly. From 62 patients deceased in hospitals 18% subjects died at first day of staying at hospitals, and 42% during first three days. Antiretroviral treatment was prescribed to 9 patients. All of the were nonadherent to treatment and follow-up. Other study subjects were nonadherent to follow-up or never on follow-up. Conclusion. In almost half of subjects the death was due to progression of HIV-disease. All HIV-infected patients had poor adherence to follow-up and/or antiretroviral treatment. The results confirm the critical importance of timely and early detection of HIV-infected persons, regular follow-up and improving adherence to antiretroviral therapy among HIVinfected patients