255 research outputs found
Self-regulation of motor activity in healthy walking lessons
No full textВолошина Людмила Николаевна, доктор педагогических наук, профессор, профессор кафедры дошкольного и специального (дефектологического) образования, Белгородский государственный национальный исследовательский университет, Белгород, Россия.
Гуляева Светлана Степановна, кандидат педагогических наук, доцент, заведующий кафедрой теории и методики физической культуры, Чурапчинский государственный институт физической культуры и спорта, Чурапча, Россия.
Гуляев Петр Дмитриевич, кандидат педагогических наук, доцент, заведующий кафедрой
рекреации и спортивно-оздоровительного туризма, Чурапчинский государственный институт физической культуры и спорта, Чурапча, Россия.
Гуляев Степан Петрович, старший преподаватель кафедры теории и методики физической
культуры, Чурапчинский государственный институт физической культуры и спорта, Чурапча;
аспирант кафедры теории и методики физической культуры, Поволжский государственный университет физической культуры, спорта и туризма, Казань, Россия. Lyudmila N. Voloshina, Doctor of Pedagogical Sciences, Professor, Professor of the Department
of Preschool and Special (Defectological) Education, Belgorod State National Research University, Belgorod,
Russia.
Svetlana S. Gulyaeva, Candidate of Pedagogical Sciences, Associate Professor, Head of the Department
of Theory and Methods of Physical Education, Churapcha State Institute of Physical Culture
and Sports, Churapcha, Russia.
Petr D. Gulyaev, Candidate of Pedagogical Sciences, Associate Professor, Head of the Department
of Recreation and Sports and Health Tourism, Churapcha State Institute of Physical Culture and Sports,
Churapcha, Russia.
Stepan P. Gulyaev, Senior Lecturer, Department of Theory and Methods of Physical Education,
Churapcha State Institute of Physical Culture and Sports, Churapcha; Post-graduate Student, Department
of Theory and Methods of Physical Education, Volga State University of Physical Culture, Sports and
Tourism, Kazan, Russia.Цель: ознакомить с опытом применения современных информационных технологий в виде мобильных приложений в процессе физкультурно-оздоровительной деятельности. Материалы и методы. Публикация подготовлена на материалах многолетних педагогических наблюдений в процессе физкультурно-оздоровительной деятельности лиц зрелого возраста, основанных на
оздоровительной ходьбе и выполнении комплекса общеразвивающих упражнений. В работе применены теоретические и эмпирические методы научного исследования. Результаты. В статье изложен
алгоритм самостоятельных наблюдений над динамикой изменения различных параметров двигательной активности, дано научное обоснование необходимости инновационного подхода к самоконтролю двигательной активности. Заключение. Использование современных информационных технологий в виде мобильных приложений позволяет регулировать параметры двигательной активности, объективно оценить объем и интенсивность физической нагрузки, количество энергозатрат при
мышечной работе. Aim. The purpose of the study is to review the experience of using modern mobile applications
in sports and recreation activities. Materials and methods. The publication has been made with the help
of the materials of many years of pedagogical observations with respect to physical education and healthenhancing
activities of mature-age persons based on healthy walking and general exercises. Theoretical and
empirical methods of scientific research are applied in the study. Results. The article presents an algorithm
for independent observations of changes in various parameters of motor activity and provides a scientific justification for the need for an innovative approach to self-control of motor activity. Conclusion. The use
of modern mobile applications allows for an adjustment of the parameters of physical activity and an objective
assessment of its volume and intensity and the amount of energy consumed during muscle work
Explicit asymptotic modelling of transient Love waves propagated along a thin coating
No full textThe official published version can be obtained from the link below.An explicit asymptotic model for transient Love waves is derived from the exact equations of anti-plane elasticity. The perturbation procedure relies upon the slow decay of low-frequency Love waves to approximate the displacement field in the substrate by a power series in the depth coordinate. When appropriate decay conditions are imposed on the series, one obtains a model equation governing the displacement at the interface between the coating and the substrate. Unusually, the model equation contains a term with a pseudo-differential operator. This result is confirmed and interpreted by analysing the exact solution obtained by integral transforms. The performance of the derived model is illustrated by numerical examples.This work is sponsored by the grant from Higher Education of Pakistan and by the Brunel University’s “BRIEF” research award
Assessment of systemic inflammatory reactions and coagulopathy against the background of hormonal therapy in covid-associated lung damage
No full textThe mechanisms of COVID-19-associated coagulopathy (CAC) are complex and differ in many ways from the standard mechanisms of thrombosis in critically ill patients. This review presents the pathogenesis, diagnosis, and comparison of various types of coagu-lopathy with SAS. During COVID-19 infection, the number of sudden deaths outside the hospital increased. One possible reason is the high incidence of serious thrombotic events in patients with COVID-19. However, the pathogenesis of these life-threatening events is multifactorial and requires independent discussion. Deviations in laboratory studies of the hemostatic system in patients infected with SARS-CoV-2 with a severe course indicate the activation of the blood coagulation system corresponding to sepsis-induced coagulopathy (SIC) or DIC. However, hemostasis dis-orders in COVID-19 have characteristics that distinguish them from DIC in sepsis. The clinical and laboratory features of CAC overlap with hemophagocytic syndrome, antiphospholipid syndrome, and thrombotic microangiopathy. The review presents data on their similarities and differences. Inadequate diagnosis or inadequate treatment of hypercoagulability may explain the high incidence of unexplained deaths from COVID-19. They can be associated with potentially preventable microvascular and macrovascular thrombosis and subsequent cardiovascular complications, including myocardial injury and infarction, as well as insufficient information content of biomarkers for their assessment. Research to identify the most informative biomarkers for decision-making to intensify anticoagulant prophylaxis in patients with severe COVID-19 is progressing rapidly, with increasing focus on TEG and ROTEM. The review presents changes in CAC during hormone therapy for COVID-19-associated lung damage. Pulse therapy with high doses of GCS has a rapid anti-inflammatory effect, but at the same time increases the level of D-dimer, which increases the risk of venous thrombosis and thromboembolism. © 2020, Remedium Group Ltd. All rights reserved
Antiamnestic effect of Phlojodicarpus sibiricus extract in a scopolamine-induced amnesia model
No full textThe present study was investigated influence of Phlojodicarpus sibiricus (Steph. ex. Spregel) K.-Pol. extract on memory in scopolamine-induced amnesia in rats using object recognition test. The rats were divided into four groups: the first group consist of rats received purified water; rats of two groups administrated scopolamine in dose 1 mg/kg and purified water intraperitoneally; rats of three and four groups introduced scopolamine and P. sibiricus extract in doses 50 and 100 mg/kg accordingly intraperitoneally. The object recognition test was performed 30 minutes after the administration of scopolamine and the P. sibiricus extract. The results of the studies showed that administration of the P. sibiricus extract in animals at doses of 50 and 100 mg/kg prevented the development of amnesia caused by the administration of scopolamine. The antiamnestic effect of P. sibiricus extract is due to the cholinergic effect of coumarins contained in the plant. (For citation: Gulyaev SM, Taraskin VV, Radnayeva LD, Nikolaev SM. Antiamnestic effect of Phlojodicarpus sibiricus extract in a scopolamine-induced amnesia model. Reviews on Clinical Pharmacology and Drug Therapy. 2017;15(4):53-57. doi: 10.17816/RCF15453-57).</jats:p
On Love-type waves in a finitely deformed magnetoelastic layered half-space
No full textIn this paper, the propagation of Love-type waves in a homogeneously and finitely deformed layered half-space of an incompressible non-conducting magnetoelastic material in the presence of an initial uniform magnetic field is analyzed. The equations and boundary conditions governing linearized incremental motions superimposed on an underlying deformation and magnetic field for a magnetoelastic material are summarized and then specialized to a form appropriate for the study of Love-type waves in a layered half-space. The wave propagation problem is then analyzed for different directions of the initial magnetic field for two different magnetoelastic energy functions, which are generalizations of the standard neo-Hookean and Mooney–Rivlin elasticity models. The resulting wave speed characteristics in general depend significantly on the initial magnetic field as well as on the initial finite deformation, and the results are illustrated graphically for different combinations of these parameters. In the absence of a layer, shear horizontal surface waves do not exist in a purely elastic material, but the presence of a magnetic field normal to the sagittal plane makes such waves possible, these being analogous to Bleustein–Gulyaev waves in piezoelectric materials. Such waves are discussed briefly at the end of the paper
Development of Very Long Baseline Interferometry (VLBI) techniques in New Zealand: Array simulation, image synthesis and analysis
No full textThis thesis presents the design and development of a process to model Very Long Base Line Interferometry (VLBI) aperture synthesis antenna arrays. In line with the Auckland University of Technology (AUT) Institute for Radiophysics and Space Research (IRSR) aims to develop the knowledge, skills and experience within New Zealand, extensive use of existing radio astronomical software has been incorporated into the process namely AIPS (Astronomical Imaging Processing System), MIRIAD (a radio interferometry data reduction package) and DIFMAP (a program for synthesis imaging of visibility data from interferometer arrays of radio telescopes). This process has been used to model various antenna array configurations for two proposed New Zealand sites for antenna in a VLBI array configuration with existing Australian facilities and a passable antenna at Scott Base in Antarctica; and the results are presented in an attempt to demonstrate the improvement to be gained by joint trans-Tasman VLBI observation. It is hoped these results and process will assist the planning and placement of proposed New Zealand radio telescopes for cooperation with groups such as the Australian Long Baseline Array (LBA), others in the Pacific Rim and possibly globally; also potential future involvement of New Zealand with the SKA. The developed process has also been used to model a phased building schedule for the SKA in Australia and the addition of two antennas in New Zealand. This has been presented to the wider astronomical community via the Royal Astronomical Society of New Zealand Journal, and is summarized in this thesis with some additional material. A new measure of quality (“figure of merit”) for comparing the original model image and final CLEAN images by utilizing normalized 2-D cross correlation is evaluated as an alternative to the existing subjective visual operator image comparison undertaken to date by other groups. This new unit of measure is then used in the presentation of the results to provide a quantative comparison of the different array configurations modelled. Included in the process is the development of a new antenna array visibility program which was based on a Perl code script written by Prof Steven Tingay to plot antenna visibilities for the Australian Square Kilometre Array (SKA) proposal. This has been expanded and improved removing the hard coded fixed assumptions for the SKA configuration, providing a new useful and flexible program for the wider astronomical community. A prototype user interface using html/cgi/perl was developed for the process so that the underlying software packages can be served over the web to a user via an internet browser. This was used to demonstrate how easy it is to provide a friendlier interface compared to the existing cumbersome and difficult command line driven interfaces (although the command line can be retained for more experienced users)
Arostrilepis beringiensis (Kontrimavichus & Smirnova, 1991) Gulyaev & Chechulin 1997
No full textArostrilepis beringiensis (Kontrimavichus & Smirnova, 1991) Gulyaev & Chechulin, 1997 (Fig. 8) Syn.: Hymenolepis beringiensis Kontrimavichus & Smirnova, 1991. Hosts in Nearctic: Lemmus trimucronatus (Richardson) and Synaptomys borealis (Richardson). Localities in Nearctic: Alaska- Barrow, Arctic Coastal plain; Brooks Range; eastern Beringia, Yukon Charley Rivers National Preserve. Material examined: Vouchers include 4 specimens in Synaptomys borealis: MSB Para 1227, 1228, 1229 (field numbers AF 49480 / cyt- b sequence and 49480 A in Berlese’s; 49481 / cyt- b sequence , 2 specimens, multiple slides) by H. Henttonen et al., from the Yukon Charley Rivers National Preserve, Alaska across the Yukon River from Glen Creek Cabin (65 o 18 ’ 9 ”N, 142 o02’ 14 ”W), 8 August 2001; MSB 1233, 1234 (AF 61601 B, 61601 C, 2 specimens) by H. Henttonen et al., from Gates of the Arctic National Preserve, Brooks Range, Alaska on unnamed lake off Koyukuk River (67 o 21 ’ 11 ”N, 150 o 51 ’00”W), 23 July 2002. Palearctic specimens: MSB 1235 (LEM 229 a and 229 b, 2 specimens) ex Lemmus sibiricus by V. Fedorov and G. Jarrell on the northwestern Taymyr Peninsula, Russia (ca., 75 o 34 ’N, 94 o 29 ’E), 24–26 June 1994; the specimen from this series (designated as LEM 117 / cyt- b sequence ) from the northwest Taymyr was not available as a voucher. See Appendix 1 for listing of additional identified voucher specimens from the Nearctic and Palearctic. Description: Based on 5 specimens. Fully developed strobila 145–196 mm long, with maximum width at pregravid or gravid proglottides, 1.5–1.8 mm. Scolex slightly compressed dorso-ventrally, 255–285 (270, n = 2) wide, clearly wider than neck. Suckers ovoid in surface view, 160–250 × 110–188 (198 × 149, n = 6), with thick walls, prominent (Fig. 8 A). Neck relatively long and narrow, 160–175 (170, n = 2) wide. Dorsal osmoregulatory canals thin, 1–3 (2.1, n = 8) wide, situated predominantly in same sagittal plane as ventral canals. Ventral osmoregulatory canals 40–65 (54, n = 8) wide. Genital ducts may pass dorsally or between longitudinal osmoregulatory canals within same strobila; intersegmental variation without regularity. Development of proglottides gradual, protandrous. Mature proglottides 160–200 × 825–1120 (174 × 980, n = 12), transversely elongate, trapeziform (Fig. 8 C). Testes usually 3 in number, almost of equal size, 140–195 × 100–140 (168 × 116, n = 15), round or oval, commonly situated in triangle with flat angle or rarely, testes form one row; poral testis separated from 2 antiporal testes by female gonads. Cirrus sac relatively short, 108–127 × 23–32 (117 × 27, n = 10), antiporal part of cirrus-sac commonly does not reach ventral longitudinal canal (Fig. 8 C). Genital atrium simple, cup-shaped, deep, opens laterally about middle of lateral proglottis margin, or slightly more anteriorly. Cirrus small, 36–47 × 9–12 (41 × 10, n = 10), cylindrical; armed along entire length with relatively small (up to 2.5–2.7 long) rosethorn-shaped spines (Fig. 8 B). Internal seminal vesicle, ovoid, 50–73 × 18–26 (63 × 21, n = 10), shorter than half of cirrus sac length (Fig. 8 C). External seminal vesicle 90–135 × 45–65 (111 × 52, n = 8), with size approximately equal to that of seminal receptacle. Ovary 300–420 (365, n = 12) wide, median, fan-shaped, irregularly lobed, slightly overlapping testes (Fig. 8 C). Vitellarium 62–92 × 152–225 (73 × 176, n = 10), postovarian, median, scarcely lobed. Vagina tubular, clearly distinct from seminal receptacle; ventral to cirrus sac. Seminal receptacle relatively small, 87–115 × 30–40 (101 × 36, n = 5). Gravid proglottides 320–430 × 1300–1800 (366 × 1547, n = 8). Fully developed uterus labyrinthine, occupying entire median field and extending bilaterally beyond longitudinal osmoregulatory canals. Eggs 33–37 × 56–62, elliptical, with thin outer coat; oncosphere 12–15 × 18–21 (Fig. 8 D). Embryophore fusiform, 14–19 × 40–46, with straight polar processes. Embryonic hooks small, 7–8 long. Remarks: Results of the present morphological analysis of specimens of A. beringiensis do not indicate a high degree of differentiation between cestodes from the Nearctic and Palearctic currently isolated across the Bering Strait (Makarikov & Kontrimavichus 2011). We observed that in specimens of A. beringiensis from the Nearctic the dimensions of the eggs, embryophores and oncospheres are larger relative to those from the Palearctic. We assume that the differences in egg measurements of the specimens are associated with the methods of specimen preparation rather than with geographical divergence of two populations. Eggs of A. beringiensis from the Palearctic were mostly compressed because these specimens, stained in Ehrlich’s haematoxylin, had been mounted permanently in Canada balsam. In contrast, gravid proglottides of specimens from the Nearctic were mounted in Berlese’s medium and as a consequence the eggs were not influenced by compression. Otherwise specimens we examined representing populations of A. beringiensis in bog lemmings and Nearctic brown lemmings from North America and Siberian brown lemmings from Eurasia do not appear to be differentiated morphologically relative to host species or specific geographic localities (Makarikov & Kontrimavichus 2011). These are the first confirmed records of A. beringiensis in eastern Beringia and the Nearctic. Additionally, cestodes reported as H. horrida in L. trimucronatus (Nearctic brown lemming) from Okpilak River, Alaska (70 o08’N, 143 o 38 ’W) by Haukisalmi and Henttonen (2001) (USNPC 89245) and those from Barrow, Alaska by R.L. Rausch (RLR 29831) are referable to this species. At Siberian localities including Lopatka Peninsula, Taymyr Peninsula, New Siberian Islands, and Wrangel Island, we confirm the presence of A. beringiensis, and redetermine records and specimens (USNPC 89243 and 89244) attributed to H. horrida by Haukisalmi and Henttonen (2001) at these sites. In Eurasia most records refer to cestodes in L. sibiricus, although other species including L. amurensis Vinogradov from eastern Siberia between the Lena and Kolyma Rivers and on the New Siberian Archipelago and L. portenkoi Tchernyavsky on Wrangel Island may be represented as hosts of this species (see Musser & Carleton 2005). Arostrilepis beringiensis appears to be geographically widespread in lemmings (both Synaptomys and Lemmus) at high latitudes in North America and in lemmings of Eurasia, although an association with species of Dicrostonyx Gloger requires confirmation (E.P. Hoberg, K.E. Galbreath, unpublished data; Haukisalmi & Henttonen 2001; Makarikov & Kontrimavichus 2011). Specimens attributed to Hymenolepis horrida have been reported as common parasites in Nearctic collared lemmings (Dicrostonyx groenlandicus (Traill)) from near Barrow, Alaska (Kuns & Rausch 1950; Schiller 1952) and are also known in the Palearctic collared lemming (D. torquatus Pallas) from northern Eurasia (e.g. Ryzhikov et al. 1978); in either case, these specimens were not available for study. Interestingly, Dicrostonyx (tribe Dicrostonychini) is not considered phylogenetically close to the true lemmings (Lemmini) (reviewed in Musser & Carleton 2005), and these arvicolines may be derived from the earliest radiation of the subfamily linking Eurasia and North America and extending to 5–6 MYA (e.g. Conroy & Cook 1999). Such suggests that there is no particular basis to predict that the host distribution for A. beringiensis may extend to species of Dicrostonyx, unless it is present due to host colonization.Published as part of Makarikov, Arseny A., Galbreath, Kurt E. & Hoberg, Eric P., 2013, Parasite diversity at the Holarctic nexus: species of Arostrilepis (Eucestoda: Hymenolepididae) in voles and lemmings (Cricetidae: Arvicolinae) from greater Beringia, pp. 401-439 in Zootaxa 3608 (6) on pages 419-422, DOI: 10.11646/zootaxa.3608.6.1, http://zenodo.org/record/21605
COMPUTER-AIDED FLOW METER APPLICABLE TO LOOSE MATERIALS IN THE COURSE OF PNEUMATIC TRANSPORTATION
No full textThe article covers the issues of development and the results of the pilot testing of the contact-free meter of the two-phase flow of loose construction materials in the course of their pneumatic transportation. The flow meter designed by the author is based on the method of registration of polarization currents caused by the motion of the dielectric material within the electric field of a measurement unit integrated into the pneumatic transportation line. The registration unit is the implementation of the original technology. Its functional concept is based on the Pockels transverse effect inside the lithium niobate crystal. This electro-optical effect is characterized by minimal persistence, as the phase of the optical wave varies within the time period of 10 second, and this effect makes it possible to improve the accuracy of measurements. The flow rates is identified on the basis of one variable integral parameter, the intensity of an optical wave passing through the Pockels cell simulated by the currents of polarization of the material. The paper contains the structural pattern of the computer-aided meter of loose dielectric materials in the course of their pneumatic transportation, the system of visualization of the mass flow, and the results of the pilot testing of the proposed meter. The proposed system may represent an unbiased system of management of construction materials, consumption procedures, and warehouse processing of materials
Weak Bonds, Strong Effects: Enhancing the Separation Performance of UiO-66 toward Chlorobenzenes via Halogen Bonding
No full textHalogen bonding (HaB) is a weak interaction that assists in the recognition of nucleophilic molecules. However, HaB elements are currently under-investigated as a part of functional materials in separation science. Herein, we develop a novel approach for introducing HaB elements into UiO-66 to fine-tune the adsorption properties toward chlorobenzenes (CBs). A series of UiO-66 containing various contents of 2-iodoterephtalic acid (I-TA) (0%, 33%, 50%, 67%, and 100%) was prepared, characterized, and applied for the selective removal of CB contaminants from
nonchlorinated aromatic analogues that cannot be separated by common distillation. Investigation of the structure−property relationship revealed that the highest adsorption capacity was achieved in the case of UiO-66
loaded with 50% I-TA (UiO-66-Iopt), and this was attributed to the balance between the number of HaB elements and the surface area of the UiO-66 structure. According to density functional theory calculations, the formation of a conjugate between dichlorobenzene and UiO-66-Iopt was more energetically favorable (up to 1.7 kcal/mol) than that of the corresponding conjugate with UiO-66. The formation of HaBs was experimentally verified by UV−vis, Raman, and X-ray photoelectron spectroscopies. To obtain functional materials for separation applications, waste polyethylene terephthalate (PET) was used as a support and feedstock for the surface-assisted growth of UiO-66-Iopt. The as-prepared PET@UiO-66-Iopt exhibited a close-to-perfect selectivity and reusability for the separation of a wide range of CBs from nonchlorinated aromatic analogues
Analytical Investigation of Surface Wave Characteristics of Piezoelectromagnetics of Class 6 mm
No full textThis short work copes with theoretical investigations of some surface wave characteristics for transversely isotropic piezoelectromagnetic composites of class 6 mm. In the composite materials, the surface Bleustein-Gulyaev-Melkumyan wave and some new shear-horizontal surface acoustic waves (SH-SAWs) recently discovered by the author can propagate. The phase velocities of the SH-SAWs can have complicated dependencies on the coefficient of the magnetoelectromechanical coupling
(CMEMC) which depends on the electromagnetic constant of the composites. Therefore, the analytical finding of the first and second partial derivatives of the represents the main purpose of this study. It is thought that the results of this short letter can help for theoreticians and experimentalists working in the research arena of opto-acoustoelectronics to completely understand some problems of surface wave propagation in piezoelectromagnetics. </jats:p
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