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Kudinov O.V.,RAS Sobolev Institute of Mathematics | Selivanov V.L.,Academy Lavrentjev pr | Zhukov A.V.,Novosibirsk State Pedagogical University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

We prove that the 1-quasiorder and the 2-quasiorder of finite k-labeled forests and trees have hereditarily undecidable first-order theories for k ≥ 3. Together with an earlier result of P. Hertling, this implies some undecidability results for Weihrauch degrees. © 2010 Springer-Verlag Berlin Heidelberg.


SCHULEIN E.,German Aerospace Center | TROFIMOV V.M.,Novosibirsk State Pedagogical University
Journal of Fluid Mechanics | Year: 2011

Large-scale longitudinal vortices in high-speed turbulent separated flows caused by relatively small irregularities at the model leading edges or at the model surfaces are investigated in this paper. Oil-flow visualization and infrared thermography techniques were applied in the wind tunnel tests at Mach numbers 3 and 5 to investigate the nominally 2-D ramp flow at deflection angles of 20°, 25° and 30°. The surface contour anomalies have been artificially simulated by very thin strips (vortex generators) of different shapes and thicknesses attached to the model surface. It is shown that the introduced streamwise vortical disturbances survive over very large downstream distances of the order of 104 vortex-generator heights in turbulent supersonic flows without pressure gradients. It is demonstrated that each vortex pair induced in the reattachment region of the ramp is definitely a child of a vortex pair, which was generated originally, for instance, by the small roughness element near the leading edge. The dependence of the spacing and intensity of the observed longitudinal vortices on the introduced disturbances (thickness and spanwise size of vortex generators) and on the flow parameters (Reynolds numbers, boundary-layer thickness, compression corner angles, etc.) has been shown experimentally.


Fomichev A.A.,Novosibirsk State Pedagogical University | Marusik Y.M.,Russian Academy of Sciences | Koponen S.,University of Turku
Arthropoda Selecta | Year: 2014

A new species, Xysticus lehtineni sp.n., is described from South Siberia on the basis of both sexes. It is closely related to X. baltistanus (Ca-poriacco, 1935) known from northern Pakistan to northeastern Asia. The two species clearly differ in size, abdominal pattern, spination and in the shape of the copulatory organs (male palp and female epigy-ne). Most of the records of X. baltistanus from Tuva refer to this new species. © 2014 Arthropoda Selecta.


Fomichev A.A.,Novosibirsk State Pedagogical University | Marusik Y.M.,University of Turku | Omelko M.M.,Far Eastern Federal University
Arthropoda Selecta | Year: 2013

A new species of ground spider, Gnaphosa ustyuzhanini sp.n. is described based on two males from western Mongolia. The new species belongs to the muscorum group and can be easily differentiated from other species within the group by the shape of the tibial and median apophyses and also by the shape of the embolus. © ARTHROPODA SELECTA, 2013.


Fomichev A.A.,Novosibirsk State Pedagogical University | Marusik Y.M.,University of Turku
Arthropoda Selecta | Year: 2013

A list of 65 spider species (excluding unidentified) collected in East Kazakhstan Region in 2011 and 2012 is provided. A new species, Zaitunia zonsteini sp.n.. is described. 19 species are record-ed for East Kazakhstan for the first time, including 3 species new to the Kazakhstan Republic. Poorly known species Pardosa italica Tongiorgi, 1966, and one uni- dentified-to-genus-level species (family Gnaphosidae) are illustrated. © Arthropoda selecta, 2013.


Fomichev A.A.,Novosibirsk State Pedagogical University | Marusik Y.M.,Russian Academy of Sciences
Arthropoda Selecta | Year: 2011

A survey of 14 species found in the Altai, for the first time is presented. The male of Dras-sodes katunensis Marusik, Hippa & Koponen, 1996, is described for the first time. Two species: Gnaphosa banini Marusik & Koponen, 2001, and Pardosa nenili-ni Marusik, 1995, are recorded from Russia for the first time. Species new to Russia and D. katunensis are illustrated. © 2011 Arthropoda Selecta.


Fomichev A.A.,Novosibirsk State Pedagogical University | Marusik Y.M.,Russian Academy of Sciences
Arthropoda Selecta | Year: 2011

A survey of 14 species found in the Altai, for the first time is presented. The male of Dras-sodes katunensis Marusik, Hippa & Koponen, 1996, is described for the first time. Two species: Gnaphosa banini Marusik & Koponen, 2001, and Pardosa nenili-ni Marusik, 1995, are recorded from Russia for the first time. Species new to Russia and D. katunensis are illustrated. © arthropoda selecta, 2011.


Pivovarova Z.F.,Novosibirsk State Pedagogical University | Blagodatnova A.G.,Novosibirsk State Pedagogical University
Russian Journal of Ecology | Year: 2016

In the soils of bog ecosystems studied in Plesetskii raion of Arkhangelsk oblast, 169 species and infraspecific taxa of algae have been recorded. Their flora includes typical divisions of soil algae and is dominated by Chlorophyta, which is typical for the soil–climatic conditions of the taiga zone in general and bog ecosystems in particular. The phytocenotic organization of algal groups can serve as an indicator of bog trophicity, since a certain trophicity level is characterized by an individual combination of dominant species, life forms, morphotypes, and ecological groups of soil algae. © 2016, Pleiades Publishing, Ltd.


Semenko E.V.,Novosibirsk State Pedagogical University
Journal of Applied and Industrial Mathematics | Year: 2010

Developing the idea to use Riemann surfaces for modeling flat flows, we completely classify all flows that can be modeled using the Riemann surface of genus 1 (the torus). © 2010 Pleiades Publishing, Ltd.


Golovin M.S.,Novosibirsk State Pedagogical University | Aizman R.I.,Novosibirsk State Pedagogical University
Bulletin of Experimental Biology and Medicine | Year: 2016

We studied the effect of audiovisual stimulation training course on physical development, functional state of the cardiovascular system, blood biochemical parameters, and hormonal status of athletes. The training course led to improvement of physical performance and adaptive capacities of the circulatory system, increase in plasma levels of total protein, albumin, and glucose and total antioxidant activity, and decrease in triglyceride, lipase, total bilirubin, calcium, and phosphorus. The concentration of hormones (cortisol, thyrotropin, triiodothyronine, and thyroxine) also decreased under these conditions. In the control group, an increase in the concentration of creatinine and uric acid and a tendency toward elevation of lowdensity lipoproteins and total antioxidant activity were observed in the absence of changes in cardiac function and physical performance; calcium and phosphorus concentrations reduced. The improvement in functional state in athletes was mainly associated with intensification of anabolic processes and suppression of catabolic reactions after audiovisual stimulation (in comparison with the control). Stimulation was followed by an increase in the number of correlations between biochemical and hormonal changes and physical performance of athletes, which attested to better integration of processes at the intersystem level. © 2016 Springer Science+Business Media New York

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