Adaptive observers for nonlinearly parameterized systems subjected to parametric constraints

We consider the problem of adaptive observer design in the settings when the system is allowed to be nonlinear in the parameters, and furthermore they are to satisfy additional feasibility constraints. A solution to the problem is proposed that is based on the idea of universal observers and non-uniform small-gain theorem. The procedure is illustrated with an example.Comment: 19th IFAC World Congress on Automatic Control, 10869-10874, South Africa, Cape Town, 24th-29th August, 201

Enhancing superconductivity: Magnetic impurities and their quenching by magnetic fields

Magnetic fields and magnetic impurities are each known to suppress superconductivity. However, as the field quenches (i.e. polarizes) the impurities, rich consequences, including field-enhanced superconductivity, can emerge when both effects are present. For the case of superconducting wires and thin films, this field-spin interplay is investigated via the Eilenberger-Usadel scheme. Non-monotonic dependence of the critical current on the field (and therefore field-enhanced superconductivity) is found to be possible, even in parameter regimes in which the critical temperature decreases monotonically with increasing field. The present work complements that of Kharitonov and Feigel'man, which predicts non-monotonic behavior of the critical temperature.Comment: 8 pages, 2 figures, EPL forma

Utrasonographic monitoring of uterine motility in infertile women with adenomyosis = Ультрасонографический мониторинг маточной перистальтики у бесплодных женщин с аденомиозом

Gladchuk I. Z., Rogachev A. P., Garbuzenko N. D., Stamova N. A. Utrasonographic monitoring of uterine motility in infertile women with adenomyosis = Ультрасонографический мониторинг маточной перистальтики у бесплодных женщин с аденомиозом. Journal of Education, Health and Sport. 2015;5(12):691-700. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.44823http://ojs.ukw.edu.pl/index.php/johs/article/view/2015%3B5%2812%29%3A691-700https://pbn.nauka.gov.pl/works/695960Formerly Journal of Health Sciences. ISSN 1429-9623 / 2300-665X. Archives 2011–2014http://journal.rsw.edu.pl/index.php/JHS/issue/archive     The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 755 (23.12.2015).755 Journal of Education, Health and Sport (null) 2391-8306 7© The Author (s) 2015;This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland and Radom University in Radom, PolandOpen Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License(http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non commercialuse, distribution and reproduction in any medium, provided the work is properly cited.The authors declare that there is no conflict of interests regarding the publication of this paper.Received: 20.12.2015. Revised 25.12.2015. Accepted: 29.12.2015.     UTRASONOGRAPHIC MONITORING OF UTERINE MOTILITY IN INFERTILE WOMEN WITH ADENOMYOSISУльтрасонографический мониторинг маточной перистальтики у бесплодных женщин с аденомиозом I. Z. Gladchuk, A. P. Rogachev, N. D. Garbuzenko, N. A. StamovaИ. З. Гладчук, А. П. Рогачевский, Н. Д. Гарбузенко, Н. А. Стамова Odessa National Medical University, UkraineОдесский национальный медицинский университет, Одесса, Украина AbstractTaking into account that the uterine pump disruption is one of the leading pathogenic links of infertility in external endometriosis, a significant role of this factor can be detected and in adenomyosis. Diagnosis of uterine peristalsis held with ultrasonography (US), and the study of intrauterine transport was made by hysterosalpingoscintigraphy. Disperistaltic waves at were revealed predominantly in periovulatory phase with the average rate of 4.8 ± 0.23 waves / min. In the control group only single disperistaltic waves throughout the cycle, and their frequency did not exceed 0.4 ± 0.11 waves / min. In all the women with the lack of intrauterine transport  either disperistaltic or complete absence of subendometrial layers of myometrium contractions wave were found.  The significant increase of hysterosalpingoscintigraphy negative results and  contralateral transport depending on the patients’ age was revealed (p <0.01 and p <0.05, respectively). Therefore, patients with adenomyosis and impaired uterine peristaltic older than 30 years old should be recommended one of the techniques of extracorporal fertilization with embryo transfer technology, except for intrauterine insemination.Key words: adenomyosis, infertility, uterine pump, uterine peristalsis. Реферат Учитывая, что нарушение работы маточной помпы - одно из ведущих звеньев патогенеза бесплодия при наружном эндометриозе, может быть обнаружена значимая роль этого фактора и при аденомиозе. Диагностика маточной перистальтики проводится при ультрасонографии (УЗИ), а исследование внутриматочного транспорта – методом  гистеросальпингосцинтиграфии (ГССГ). Дисперистальтические волны при аденомиозе обнаружены преимущественно в периовуляторной фазе со средней частотой 4,8±0,23 волн/мин. В контрольной группе наблюдались только единичные дисперистальтические волны на протяжении всего цикла и их частота не превышала 0,4±0,11 волн/мин. У всех женщин с отсутствием внутриматочного транспорта обнаружены дисперистальтика или полное отсутствие волн сокращения субэндометриальных слоев миометрия. В ходе исследований обнаружено, достоверное увеличение числа случаев отрицательных результатов ГССГ и контралатерального транспорта с возрастом пациенток (р<0,01 и p<0,05, соответственно). Поэтому пациенткам с аденомиозом и нарушением маточной перистальтики старше 30 лет следует рекомендовать одну из методик экстракорпорального оплодотворения с технологией переноса эмбриона, исключая внутриматочную инсеминацию.Ключевые слова: аденомиоз, бесплодие, маточная помпа, маточная перистальтика

The influence of multilayer metal-carbon coatings composition with different arrangement of functional layers on their surface morphology

This research was supported by the grants of Belarussian Republican Foundation for Fundamental Research BRFFR № T17KIG-009

Structure of 8B from elastic and inelastic 7Be+p scattering

Motivation: Detailed experimental knowledge of the level structure of light weakly bound nuclei is necessary to guide the development of new theoretical approaches that combine nuclear structure with reaction dynamics. Purpose: The resonant structure of 8B is studied in this work. Method: Excitation functions for elastic and inelastic 7Be+p scattering were measured using a 7Be rare isotope beam. Excitation energies ranging between 1.6 and 3.4 MeV were investigated. An R-matrix analysis of the excitation functions was performed. Results: New low-lying resonances at 1.9, 2.5, and 3.3 MeV in 8B are reported with spin-parity assignment 0+, 2+, and 1+, respectively. Comparison to the Time Dependent Continuum Shell (TDCSM) model and ab initio no-core shell model/resonating-group method (NCSM/RGM) calculations is performed. This work is a more detailed analysis of the data first published as a Rapid Communication. [J.P. Mitchell, et al, Phys. Rev. C 82, 011601(R) (2010)] Conclusions: Identification of the 0+, 2+, 1+ states that were predicted by some models at relatively low energy but never observed experimentally is an important step toward understanding the structure of 8B. Their identification was aided by having both elastic and inelastic scattering data. Direct comparison of the cross sections and phase shifts predicted by the TDCSM and ab initio No Core Shell Model coupled with the resonating group method is of particular interest and provides a good test for these theoretical approaches.Comment: 15 pages, 19 figures, 3 tables, submitted to PR

Low-lying states in 8B

Excitation functions of elastic and inelastic 7Be+p scattering were measured in the energy range between 1.6 and 2.8 MeV in the c.m. An R-matrix analysis of the excitation functions provides strong evidence for new positive parity states in 8B. A new 2+ state at an excitation energy of 2.55 MeV was observed and a new 0+ state at 1.9 MeV is tentatively suggested. The R-matrix and Time Dependent Continuum Shell Model were used in the analysis of the excitation functions. The new results are compared to the calculations of contemporary theoretical models.Comment: 6 pages, 5 figures, accepted as Rapid Communication in Phys. Rev.

Pair-breaking quantum phase transition in superconducting nanowires

A quantum phase transition (QPT) between distinct ground states of matter is a wide-spread phenomenon in nature, yet there are only a few experimentally accessible systems where the microscopic mechanism of the transition can be tested and understood. These cases are unique and form the experimentally established foundation for our understanding of quantum critical phenomena. Here we report the discovery that a magnetic-field-driven QPT in superconducting nanowires - a prototypical 1d-system - can be fully explained by the critical theory of pair-breaking transitions characterized by a correlation length exponent $\nu \approx 1$ and dynamic critical exponent $z \approx 2$. We find that in the quantum critical regime, the electrical conductivity is in agreement with a theoretically predicted scaling function and, moreover, that the theory quantitatively describes the dependence of conductivity on the critical temperature, field magnitude and orientation, nanowire cross sectional area, and microscopic parameters of the nanowire material. At the critical field, the conductivity follows a $T^{(d-2)/z}$ dependence predicted by phenomenological scaling theories and more recently obtained within a holographic framework. Our work uncovers the microscopic processes governing the transition: The pair-breaking effect of the magnetic field on interacting Cooper pairs overdamped by their coupling to electronic degrees of freedom. It also reveals the universal character of continuous quantum phase transitions.Comment: 22 pages, 5 figure

Alpha cluster resonance structure of light nuclei close to coulomb barrier

The aim of this experimental study is to investigate the structure of the 19F nuclei at energies representing astrophysical interest. Here we study the resonant interaction 15N+4He in the cyclotron DC-60 in Astana

Catalytic Activity of Ni Nanotubes Covered with Nanostructured Gold

Ni nanotubes (NTs) were produced by the template method in the pores of ion-track membranes and then were successfully functionalized with gold nanoparticles (Ni@Au NTs) using electroless wet-chemical deposition with the aim to demonstrate their high catalytic activity. The fab-ricated NTs were characterized using a variety of techniques in order to determine their morphology and dimensions, crystalline structure, and magnetic properties. The morphology of Au coating de-pended on the concentration of gold chloride aqueous solution used for Au deposition. The catalytic activity was evaluated by a model reaction of the reduction of 4-nitrophenol by borohydride ions in the presence of Ni and Ni@Au NTs. The reaction was monitored spectrophotometrically in real time by detecting the decrease in the absorption peaks. It was found that gold coating with needle-like structure formed at a higher Au-ions concentration had the strongest catalytic effect, while bare Ni NTs had little effect. The presence of a magnetic core allowed the extraction of the catalyst with the help of a magnetic field for reusable applications. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.Funding: The work was carried out with the support of the Ministry of Science and Higher Education of the Russian Federation in the framework of the State Task (project code 0718-2020-0037)