Special Issue No. – 10, June, 2020

“Quantative Methods in Modern Science” organized by Academic Paper Ltd, Russia

FREQUENCY DEPENDENCE OF RADIO WAVE SURFACE IMPEDANCE OF CENTRAL YAKUTIA PERMAFROSTBASED ON RESULTS OF NUMERICAL MODELING

Authors:

Vladimir N. Efremov,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00001

Abstract:

The results of numerical modeling of frequency dependence of permafrost surface impedance in a band of 1 Hz to 1000 MHz are shown for typical geoelectric sections (GESs) of Central Yakutia. Particular qualities of frequency dependence are represented by oscillation values in a wide frequency band. The role the bias and conduction currents play is marked. Two main bilayer models of permafrost are discussed: weak-inductive and strong-inductive models. Additional three-six layer models are considered along with indication of their particular qualities and conformity with natural sections. An example of models’ comparison with radio impedance sounding data is given. One marks the significance the phase curves of radio impedance sounding possess when used for determination of GES type under condition of approximate automatic interpretation.

Keywords:

Numerical modeling,permafrost zone,Central Yakutia,wide frequency band,models’ comparison,

Refference:

I. BerdichevskyM.N. Electrical prospectingby means of MT profiling. М.: Bowels of the Earth. 1968. 255 p.
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III. BulgakovА.C.,RysakovV.М. About opportunity of application of electromagnetic high frequency oscillations in exploration geophysics. Problems of diffraction and wave propagation. 1st issue / EditedbyMakarovaG.I. L.: 1962. P. 143-150.
IV. DolukhanovМ.P. Radio waves propogation. М.: Bond. 1972. 336 p.
V. Efremov V.N. About opportunity of application of thin conductive layers in permafrost grounds for rational grounding execution // Power stations. – №1, 2006. – P.62-64.
VI. Efremov V.N. Central Yakutia grounds’ electrical features in a radio wave field. Results of geocryological investigations in Yakutia in XX century. Prospects for further development / Edited by Shepeleva V.V. Yakutsk: 2003. P. 150-167.
VII. Efremov V.N., Dedyukina N.D., ShastkevichYu.S. Thickness of an active part of underlying permafrost in VLF-LF band. Propagation of –km band radio waves. / Edited by BeloglazovaМ.I. Apatity: 1987. P. 82-84.
VIII. EfremovV.N.Surface impedance of cryolitozone at radio frequencies. Geophysical investigations inYakutia / EditedbyStogniaV.V. Yakutsk: 1995. – P. 70-80.
IX. Efremov V.N. Theoretical and experimental aspects of permafrost radio impedance sounding results interpretation // Science and Education. 2007. Т. 48. № 4. P.97-103.
X. Gordeev S.G. Sedelnikov E.S., TarhovА.G. Electrical prospecting by means of radio comparison and direction finding. М.: Bowels of the Earth. 1981. 132 p.
XI. Gyunninen E.М., Makarov G.I. Field of point dipole over impedance surface. Problems of diffraction and wave propagation. 5th issue. / Edited by Makarova G.I. L.: 1966. P. 97-120.
XII. TsydypovCh.Ts.,Tsydenov V.D., BashkuevYu.B. Investigation of electrical properties of underlying environment. Novosibirsk: Science. 1979. 176 p.
XIII. VeshevА.V.,Egorov V.А. About methodology of observation and interpretation of results of broadcast stations’ fields study. // Questions of geophysics. Scientific notes LGU. 1966. 16th issue. № 329. P. 172-189.

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STRAINED VALVE-HOUSING CONTACT OF HYDRAULIC STEER

Authors:

Petr V. Senin,Aleksei V. Stolyarov,Sergey V. Chervyakov,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00002

Abstract:

The use of hydrostatic steerage in agricultural and construction vehicles shows that, compared to traditional hydromechanical steerage, it has better balance and no steering wheels vibrations. But in certain environments, these automobiles have to work in severe conditions and the steering breaks down rather quickly. There can be multiple reasons for this – dirt, wear, excessive turn effort. The analysis of defects of the XY 145 0/1 hydraulic steers has demonstrated that 100% of breakdowns are caused by the wear of the slide valve-housing pair, i.e. this contact is limitative. Therefore, complete wear of these parts lead to the situation when turning the vehicle requires the effort exceeding normal. To find out how to increase durability of the valve-housing pair, we conducted a research of its stress-strain state. The strains in the contact can be studied with the help of the finite-element method which allows high-precision modeling of any components and mechanisms in operation. As a result, we generated a finite-element mesh with the minimal, average and maximal pressure values, transitions and deformations in elements; pressure values were presented as a graphical file with a diagram. The model of the strain state of hydraulic steer XY-145 slide valve-housing contact can be used in selecting the materials which, applied to the worn surfaces, will increase the general durability of hydraulic steers.

Keywords:

Steerage,hydraulic steer,fault, wear,finite-element method,

Refference:

I. Burumkulov F.Kh., Ivanov V.I., Velichko S.A., Ionov P.A., Suldin S.P. (2005), Increasing of reliability of NSh-U hydraulic pumps by electric spark alloying of the working surfaces of friction couples, Elektronnaya Obrabotka Materialov, Vol. 41, No. 6, 13–18 (in Russian).

II. Burumkulov F.Kh., Velichko V.I., Ivanov V.I., Ionov P.A., Okin M.A., Stolyarov A.V. (2009), Electric spark nanocomposite coatings and their wear resistance, Machinery in Agriculture, № 1, 11-13 (in Russian).

III. Burumkulov F.Kh., Ivanov V.I., Velichko S.A., Denisov, V.A. (2014), Plasticity of electrospark. Surface Engineering and Applied Electrochemistry, Vol. 50, No. 2, 106–110.

IV. Galkin V.O. (2011), Analysis of mathematical models. Binom, Мoscow, Russia. (in Russian)

V. Mamaev V.B. (2013), Analysis of tense and deformed state in elementary unit on the example of precipitation process. Izvestia BMSTU. Retrieved from http://cyberleninka.ru/article/n/analiz-napryazhennogo-i-deformirovannogo-sostoyaniya-v-elementarnom-obeme-na-primere-protsessa-osadki (in Russian).

VI. Senin P.V., Davydkin A.M., Chervyakov S.V. (2013), Malfunction causes of dosing pumps and hydraulic steers (on the example of a hydraulic steer of the XY 145-0/1 trademark). Traktora i Selkhozmashiny, №12, 38-40 (in Russian).

VII. Stolyarov A.V. (2009), Increasing TBO of axial-piston hydraulic pump with slanting sheave block for restoration and hardening of worn surfaces of components. Dissertation. Saransk, Russia(in Russian).

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JUSTIFICATION OF SAPONARIA OFFICINALIS (S. OFFICINALIS) CULTIVATION PERIOD IN THE SOIL AND CLIMATIC CONDITIONS FOR PRIMORSKY REGION (RUSSIA) AND ANALYSIS OF SAPONIN ROOT EXTRACTS

Authors:

Elena I. Cherevach,Regina K. Shchekaleva2,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00003

Abstract:

The purpose of this study was to explore the possibility ofboth soapwort (S. officinalis L.) and bouncing Bet,or double‑flowered soapwort (var.floreplenе hort.) cultivation in the soil and climate conditions of PrimorskyKrai (Russia); to study the effects ofS. officinalis vegetation time on the composition and micellar properties of saponin root extracts for their use as highly effective natural surfactants. The dynamics of the saponin accumulation in the root, depending on the cultivation time, is studied. The values of the surface tension and the critical micelle concentration indicators of saponins and water root extracts are established for both S. officinalis types and different vegetation time.The influence of different technological factors on the micellar parameters of saponin roots for both S. officinalis types is investigated.It was found that highersaponin parameters of the bouncing Bet S. officinalis type allows recommending it as a highly promising source of natural surfactants, on a pair with commercial Quillajasaponin by its micellar parameters.The established pattern in hemolytic activity changes of the extracts from the vegetative stage S. officinalis roots allowsexpanding the sphere of their application.

Keywords:

Biological activity,cultivation period,emulsifiers,micellar parameters,Saponaria roots (S. officinalis),saponin extracts,soil and climatic conditions,surfactants,triterpene glycosides,

Refference:

I. Abramzon, A. A.(1981)Poverkhnostno-aktivnyeveshchestva. Svoystva i primenenie [Surfactants: Properties and applications]. 2nd ed. Leningrad: Khimiya[in Russian].
II. Abramzon, A. A., Bobrova, L. Ye., Zaychenko, L. P. (1984) Poverkhnostnyeyavleniya i poverkhnostno-aktivnyeveshchestva: Spravochnik. L.: Khimiya, pp: 392 [in Russian].
III. Anisimov, M. M., Chirva, V. Ya. (1980) O biologicheskoyrolitriterpenovykhglikozidov [On biological role of triterpene glycosides]. Uspekhisovremennoybiologii. 6 (3), 351–364 [in Russian].
IV. Cheeke, P. R. (2000) Actual and potential applications of Yucca schidigera and Qullajasaponariasaponins in human and animal nutrition. In W. Oleszek, A. Marston, eds. (2000) Saponins in Food, Feedstuffs and Medical Plants: Proceeding of the Phythochemical Society of Europe. London, Boston: Kluwer Academic Publishers, 45, 241–254.
V. Dekanosidze, G. Ye., Chirva, V. Ya., Sergienko, T. V., Uvarova, N. I. (1982) Issledovanietriterpenovykhglikozidov: ustanovleniestroeniya i sintez [Study on Triterpene Glycosides: Characterization and Syntesis]. Tbilisi: Metsniereba [in Russian].
VI. Gladyshev, A. I., Mishchenko, I. S. (1990) KolyuchelistnikiTurkmenistana, ikhbiologiya i perspektivihozyaystvennogoispolzovaniya [Acanthophyllum of Turkmenistan, Their Biology and Prospects for Economic Use]. Ashkhabad Ylym [in Russian].
VII. Güçlü–Üstündag, Ö.,Mazza, G. (2007) Saponins: Properties, applications and processing. Critical Reviews in Food science and nutrition, 47, 231–258.
VIII. Gurfinkel, D. M., Rao, A. V. (2003) Soyasaponins: The relationship between chemical structure and colon anticarcinogenic activity. Nutrition and Cancer, 47, 24–33.
IX. Horowits, P. M. (1977) A comparison between 8-anilinonaphtalen-1-sulfonate as fluorescent indicator of critical micelle concentration of sodium dodecyl sulfate. Journal of Colloid and Interface Science, 2 (61), 197–198.
X. Kim, S.-W., Park, S.-K., Kang, S.-I., Kang, H.-S., Oh, H.-J., Bae, C.-Y., Bae, D.-H. (2003) Hypocholesterolemic property of Yucca schidigera and Quillajasaponaria extracts in human body. Archives of Pharmacal Research, 26, 1042–1046.
XI. Kuznetsova, T. A., Ivanushko, L. A., Makarenkova, I. D., Cherevach, E. I., Tenkovskaya, L. A. (2014) Effects of S. officinalis L. radix triterpene glycosides on innate immunity factors. Bulletin of Experimental Biology and Medicine, 3 (156), 366–369.

XII. Lacaille-Dubois, M. A., Wagner, W. (2000) Bioactivesaponins from plants: an update. Studies in Natural Products Chemistry, 21, 633–687.
XIII. Ladygina, Ye. Ya.,Safronich, L. N., Otryashenkova, V. E. (1983) Khimicheskiyanalizlekarstvennykhrasteniy [Chemical Analysis of Medical Plants]. Moscow: VysshayaShkola [in Russian].
XIV. LovkovaM.Ya., G.N. Buzuk, S.M. Sokolova and N.I. Klimenteva, 2001. Osobennostikhimizmalekarstvennykhrasteniy. Prikladnayabiokhimiya i mikrobiologiya. 37(3): 261–273 [in Russian].
XV. Man, S., Gao, W., Zhang, Y. (2010) Chemical study and medical application of saponins as anti-cancer agents. Fitoterapia, 81, 703–714.
XVI. Masahiro, A., Hisayuki, K., Yoshimaru, K. (1984) Emulsifiable composition. Shiseido CO Ltd., JP 59007106 Japan Int Cl7. A61K8/30; A61K8/06; A61K8/34; A61K8/72.
XVII. Mitra, S., Dungan, S. R. (1997)Micellar properties of quillajasaponin. 1. Effects of temperature, salt and pH on solution properties. Journal of Agricultural and Food Chemistry, 45 (5), 1587–1595.
XVIII. Mitra, S., Dungan, S. R. (2000)Micellar properties of quillajasaponin. 2. Effects of solubilized cholesterol on solution properties. Colloids and surfaces B: Biointerfaces, 17 (2), 117–133.
XIX. Mitra, S. Dungan, S. R. (2001) Cholesterol solubilization in aqueous micellar solutions of quillajasaponin, bile salts or nonionic surfactants. Journal of Agricultural and Food Chemistry, 49, 384–394.
XX. Motkhin, I. N., Sukach, Ye. A. (1970) Izuchenienakopleniyadubilnykhveshchestv u nekotorykhvidovrodaAllochrusa v kulture[Study of tannins accumulation in some species of the genus Allochrusa in culture]. In L. E. Pauzner, ed. (1970) Novyedannyepobiologiidubilnykh i lekarstvennykhrasteniy [New Data on Biology of Tanniferous and Medical Plants]. Tashkent: Fan, 88–92 [in Russian].
XXI. Ninomiya, M., Matsumoto, M., Mabe, K., Okubo, T., Kin, B., Kusuda, R. (1996) Composition for feed. JP 813 1087 A.
XXII. Oda, K., Matsuda, H., Murakami, T., Katayama, S., Ohgitani, T., Yoshikawa, M. (2000) Adjvant and haemolytic activities of 47 saponins derived from medicinal and food plants. Biological Chemistry, 381, 67–74.
XXIII. Patra, A. K., Stiverson, J., Yu, Z. (2012) Effects of quillaja and yucca saponins on communities and select populations of rumen bacteria and archaea, and fermentation in vitro. Journal of Applied Microbiology, 113, 1329–1340.
XXIV. Rao, A. V., Sung, M. K. (1995) Saponins as anticarcinogens. Journal of Nutrition, 125, 717–724.
XXV. Sparg, S. G., Light, M. E., van Staden, J. (2004) Biological activities and distribution of plant saponins. Journal of Ethnopharmacology, 94, 219–243.
XXVI. Summary of All GRAS Notices (2002) U.S. Food and Drug Administration, Center for Food Safety & Applied Nutrition, Office of Food Additive Safety, Oct. 2002. Data on quillaja available at: https://www.fda.gov/Food/IngredientsPackagingLabeling/GRAS/NoticeInventory/ucm154575.htm [Accessed 7 July 2017].
XXVII. Тamura, Y., Miyakoshi, M., Yamamoto, M. (2012) Application of saponin-containing plants in foods and cosmetics. In: H. Sakagami, ed. (2003) Alternative Medicine, 85–101. Yukiyoshi Tamura, Masazumi Miyakoshi and MasajiYamamoto (2012). Application of Saponin-Containing Plants in Foods and Cosmetics, Alternative Medicine, Prof. Hiroshi Sakagami (Ed.), InTech: InTech: Rijeka. DOI: 10.5772/53333
XXVIII. Tava, A., Chiari, M., Oleszek, W. (2000) Separation of Alfalfa (Medicagosativa L.) saponins as their borate complexes by capillary electrophoresis. In Saponins in food, feedstuffs and medical plants: Proceeding of the Phythochemical Society of Europe. In W. Oleszek, A. Marston, eds. (2000) Saponins in Food, Feedstuffs and Medical Plants: Proceeding of the Phythochemical Society of Europe. Boston, London: Kluwer Academic Publishers, 45, 43–56.
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XXX. Tsybulko, Ye. I, Yudina, T. P., Yershova, T. A.,Cherevach, Ye. I. (2004)Kompleksnyyemulgator-stabilizator s shirokimspektromfiziologicheskogodeystviya [Complex emulsifier stabilizer of mixed physiological effect]. Sovremennyenaukoemkietekhnologii, 2, 78 [in Russian].
XXXI. Wen-Teng, W., Jech-Wei, C., Hsin-Ju, H. (2007) Method of emulsifying phytosterol by natural saponin, emulsion prepared thereby and water dispersible phytosterol powder product. Weckteck Biotechnology Company, US 2007014819 Taiwan, Int Cl7. A61K31/704; A61K31/56; A61K31/7028; A61K31/56. /, (TW). – № US20050179472 20050713.
XXXII. Yang, Y., Leser, M. E., Sher, A. A., McClements, D. J. (2013) Formation and stability of emulsions using a natural small molecule surfactant: Quillajasaponin (Q-Naturale). Food Hydrocolloids, 30 (2), 589–596.
XXXIII. Yukio, K., Yasushi, T., Youichi, S., Makoto, I. (1985) Production of powdery or granular vitamin E preparation. Ajinomoto KK, Asahi Denka Kogyo KK., JP 60064919 Japan Int Cl7. A61K31/355; A61K9/14; A61K31/352; A61K9/14. /, – № JP19830172527 19830919.

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CIS-CASPIAN DEPRESSION AND ITS REFLECTION IN GEOPHYSICAL ANOMALIES

Authors:

Elena N. Volkova,Ekaterina A. Vlasenko,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00004

Abstract:

The article presents new methodological methods for interpreting geological and geophysical data with the aim of justifying the search for oil and gas in the inner regions of Cis-Caspian depression and confirming the hypothesis of uplifted foundation blocks and large drillable subsalt elevations. For the territory of Cis-Caspian depression, new schemes of composite magnetic field strength and gravity field anomalies maps were obtained at different transformation parameters, taking into account qualitative zoning of the territory according to sign ratios. The transformed parameters are obtained by analytic continuation into the upper half-space to a height of 5-50 km by calculating the residual values and difference in the geophysical values between the altitude levels, i.e. by obtaining interval transformants that narrowed the range of the possible interval of the geological section, in which the appearance of anomalous-forming masses in the subsalt paleozoic can be expected. The observed fields were represented in the form of numerical matrices covering theentire territory of Cis-Caspian depression with 120*100 dimensions of elements for maps of 1: 1 000000 scales. A total of 40 schemes of geophysical parameters were generated. In the central part, the transformations allowed identifying large, intense anomalies associated with the morphology of the subsalt bed surface. Gravity steps, which limit large anomalies, testify to the steep slopes of structural elements. This isthe possible zones of transition from shallow-water conditions to deep-water ones. The oil and gas prospects of the geological situation are determined by a combination of negative magnetic and positive gravitational fields observed in theincreasingly thick areas of carbonate rocks caused by organogenic structures of basinal, flankand shelftype on the slopes of major elevations. As a result of processing and interpretation, in Hobdin high area the author predicts the existence of an elevated relative to the depression part zone within which a possible socle for further growth of large carbonate structures such as Karachaganak is located. The zone with the same signs is also registered in the western part of the Central Caspian depression in the region of Aralsor gravity high.

Keywords:

Oil and gas prospects,geology,geophysics,Cis-Caspian depression,gravityprospecting, magnetic prospecting,interpretation,anomalies,transformations,

Refference:

I. Aitieva N. T., Utegaliev S. U. Conditions for the formation of oil and gas deposits of Karaton-Tengiz oil and gas accumulation zone // Oil and gas geology. 1983. No. 4. P. 51-54.

II. Akishev T. A., Khrychev B. A. ,Lesom N. A. Deep structure of Cis-Caspian depression by seismological data. The study of the earth crust by seismic measurements. M., 1989.

III. Aksenov A. P., Goncharenko B. D. Oil and potential of sub-salt deposits. M.: Nedra, 1985. 205 p.

IV. Aleksandrov V. I., Shatalov O. V. Pre-salt carbonate reservoirs of Saratov part of Cis-Caspian depression – new oil and gas exploration targets // Oil and gas geology. 1982. No. 5. P. 6-9.

V. Alekseev G. P. The role of aeromagnetic recording in sedimentary cover structures search // Geology of oil and gas. 1993. No. 3. P. 38-41.

VI. Aznabayev E. K., Ozdoev S. M. Provodnikov L. Ya. Foundation and oil and gas potential of Cis- Caspian and adjacent areas // Proceedings of the Academy of Sciences of the Kazakh SSR. Geology Series. 1989. No. 1. P. 13-31.

VII. Barulin R. I., Volkova E. N., Ryskin M. I. New data on the structure of the subsalt of the south of Cis-Caspian depression // Oil and gas geology. 1985. N11. P. 14-18.

VIII. Berezkin V. M. Use of gravity survey in oil and gas deposits prospecting. M.: Nedra , 1978. 214 p.

IX. Danyan I. B. Oil and gas prospectivity of middle visea and upper devon of the eastern margin of Cis-Caspian depression // Proceedings of Academy of Sciences of the Kazakh SSR . 1988. No. 3. P. 53-58.

X. Fedorov D. L. Formations and oil and gas potential of subsalt Paleozoic marginal basins of European Platform. M.: Nedra 1979.

XI. Fotiadi E. E. Geological structure of the Russian platform according to regional geophysical studies and formation drilling. M.: Gostoptekhizdat 1958. 244 p.

XII. Geological bases for the creation of Caspian oil and gas extraction complex. M.: Nauka, 1990. 134 p.

XIII. Geophysical methods of oil and gas prospecting and exploration // Intruniv. Research papers. Ed. by Malovichko A. K. Perm , 1992. 220 p.

XIV. Kontsenebin Yu. P. Geological interpretation of gravity anomalies of Lower Volga region. Saratov. SSU Press 1988.

XV. Kunin N. Ya. Complexification of geophysical methods. M.: Nedra, 1972.

XVI. Malovichko A. K. Modern state of gravitational and magnetic anomalies interpretation theory // Geophysical methods of prospecting and exploration of oil and gas deposits. 1985. P. 1-11.

XVII. Nevolin N. V. Geological and geophysical characteristics of subsalt sediments of the south part of Cis-Caspian depression // Soviet Geology. 1989. No. 3. P. 112-117.

XVIII. Ryskin M. I. et al. Identification of spatial regularities of oil and gas perspective zones location based on structural and geophysical zoning // Regional scientific and technical review. 1995. February. Issue 8.

XIX. Ryskin M. I. et al. Integration of geophysical methods for searching organogenic buildups in subsalt sections of Cis-Caspian depressions // Oil and gas geology. 1992. No. 7. P. 31-34.

XX. Ryskin M. I., Volkova E. N., Sokulina K. B. Geological and tectonic interpretation of gravity and magnetic data at regional geophysical profiles processing // Proceedings of Saratov University. Earth Sciences series. 2010. Volume 10, Ed. 2. Pp. 66 – 75.

XXI. Semerkin V. I. Integrated geological interpretation of exploration physics data. Tyumen. 1977. 150 p.

XXII. Shebaldin V. P. Geological structure Cis-Caspian depression flank gravity step // Oil and gas geology and geophysics. 1973. N8

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XXV. Tymoshenko E. F. Erosive crystalline basement humps prediction by geological and geophysical methods complex // Geophysical studies in Tataria and adjacent regions. Kazan. 1988. P. 5-8.

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XXVII. Volkova E. N., Kontsenebin Yu. P., Barulin D. A. Interval transformants of gravitational and magnetic anomalies of Cis-Caspian depression // Geological and Geophysical exploration of the south-east of Russian platform. Saratov: SRO IRNGO EAGC, 2004. P.59-67.

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THRESHOLD PARAMETERS OF THE EPIZOOTIC SITUATIONIN THE NATURAL FOCI OF HANTAVIRUSES IN PRIMORSKY KRAI

Authors:

Tatyana V. Kushnareva,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00005

Abstract:

The 1999–2012 monitoring of epizootic situation registered active natural foci of the Hantaan, Amur, Hokkaido and Vladivostok hantaviruses, the first two of which cause hemorrhagic fever with renal syndrome (HFRS). The peculiar features of the forest and forest–steppe natural foci of hantaviruses were revealed. In the southwest parts of the region in the forest–steppe foci, Apodemusagrarius and Microtusfortis infected with the Hantaan and Vladivostok hantaviruses respectively were found; in the forest foci of the central and northeast parts, Apodemuspeninsulae and Myodesrufocanus infected with the Amur and Hokkaido viruses were registered. In all phases of the epizootic cycle, the indicators of number and contamination in mice populations were much higher as compared with vole populations. HFRS incidence in the forest–steppe and forest focal territories correlated with the activity of the Hantaan and Amur virus foci respectively. The results of the monitoring allowed us to determine the threshold indicators of number and contamination of small mammals (SM) at which aggravation of HFSR epidemic situation occurs in the forest–steppe and forest foci of hantaviruses. In case of increased epizootic activity in the Apodemus mice populations, it is necessary to carry out a complex of preventive measures against HFRS.

Keywords:

Small mammals,epizootologic monitoring,Hantaan,Amur,Hokkaido,Vladivostok hantaviruses,hemorrhagic fever with renal syndrome (HFRS),natural foci,PrimorskyKrai,

Refference:

I. Dzagurova T.K. Gemorragičeskaâlihoradka s počečnymsindromom: Ètiologiâ, specifičeskaâlaboratornaâdiagnostika, razrabotkadiagnostičeskih i vakcinnyhpreparatov [Hemorrhagic fever with renal syndrome: Etiology, specific laboratory diagnostics, development of diagnostic and vaccine drugs]. Dissertation. Moscow: Chumakov Institute of Poliomyelitis and Viral Encephalitides. 2014.

II. Korenberg E.I. Emergence of Tick-borne zoonozes from the standpoint of the theory of natural focality of infections. In: M. Kazimirova, M. Labuda, P.A. Nuttall (eds.), Ticks and Tick-Borne Pathogens into 21st Century. Proceedings of the 3rd International Conference. Bratislava, 2000. Pp. 43–46.

III. Korenberg E.I. Prirodnaâočagovost’ infekcij: sovremennyeproblemy i perspektivyissledovanij [Natural focality of infections: Modern problems and prospects of research]. Russian Journal of Zoology. 2010; 89(1): 5–17.

IV. Korenberg E.I. Ûbilejteoriiakademika E.N. Pavlovskogo o prirodnojočagovostiboleznej (1939–2014) [Anniversary of the theory of academician E.N. Pavlovsky about the natural focality of diseases (1939–2014)]. Epidemiology and Vaccinal Prevention. 2015; 1(80): 9–16.

V. Kosoy M.Y., Slonova R.A., Mills J.N., Mandel E., Childs J.E. Community structure and prevalence of Hantavirus infection in rodents: A geographic division of the enzootic area in Far Eastern Russia. J. Vector Ecol. 1997; 22(1): 52–63.

VI. Kruger D.H., Figueiredo L.T.M., Song J-W., Clempa B. et al. Hantaviruses — Globally emerging pathogens. J. Clin. Virol. 2016; 64: 128–136.

VII. Kushnareva T.V. New aspects of ecology of hantaviruses and hantaviral infections. East European Science Journal. 2016; 1: 21–26.

VIII. Kushnareva T.V., Slonova R.A. Rezervuarnyjpotencialprirodnyhhozâevhantavirusov v dinamikeèpizootičeskogoprocessa v èkosistemahPrimorskogokraâ [Reservoir potential of natural hosts of hantavirus within a framework of epizootic process in the ecosystems of PrimorskyKrai]. Contemporary Problems of Ecology. 2014; 7(1): 19–25.

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XI. Lvov D.K. Značenievnov’ vozvraŝaûŝihsâinfekcij v biobezopasnosti [Significance of emerging–reemerging infections in biosafety]. Problems of Virology. 2002; 5: 4–7.

XII. Manigold T., Vial P. Human hantavirus infections: epidemiology, clinical features, pathogenesis and immunology. Swiss Med. Wkly. 2014; 144: w13937.

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XIV. Onishchenko G.G., Simkalova L.M. Soveršenstvovaniefederal’nogoèpidemiologičeskogonadzora, obespečeniebiologičeskojbezopasnostinaseleniâRossijskojFederacii [Improvement of federal epidemiological surveillance, provision of biologic security of population of Russian Federation]. Journal of Microbiology, Epidemiology and Immunobiology. 2013; 5: 27–35.

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XVI. Order of Main State Sanitary Physician of Russian Federation from 14.01.2013 № 6 “Ob utverždeniiinstrukciipooformleniûobzora i prognozačislennostimelkihmlekopitaûŝih i členistonogih [About regulation approval of review and forecast appearance in population of small mammal and arthropods]”. Disinfection Affairs. 2013: 1(83): 51–56.

XVII. Sanitary and epidemiologic rules 3.1.7.2614-10. “Profilaktikagemorragičeskojlihoradki s počečnymsindromom [Prevention of hemorrhagic fever with renal syndrome]”. Approved 26 April 2010 by Main State Sanitary Physician of Russian Federation.

XVIII. Sergiev V.P., Malyshev N.A., Drynov I.D. Infekcionnyebolezni i civilizaciâ: Prošloe, nastoâŝee, buduŝee [Infectious diseases and civilization: Past, present, future]. Moscow: 2000.

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XXV. Trankvilevsky D.V., Zhukov, V.I., Romashov B.V. et al. Aktual’nyevoprosymedicinskojteriologii v rabote X S”ezdaTeriologičeskogoobŝestva RAN [Actual problems of medical teriology in the work of the X Congress of Teriologic society of RAS]. Public Health and the Environment. 2016; 4(277): 51–56.

XXVI. Verzhutski D.B. SovremennoesostoâniezoologičeskojrabotypoobespečeniûèpidemiologičeskogoblagopolučiâRossii [The present situation of zoological service in providing epidemiological welfare of Russia]. Baikalskijzoologičeskijžurnal. 2013; 1(12): 109–112.

XXVII. Yashina L.N. Genetičeskoeraznoobraziehantavirusov v populâciâhgryzunov i nasekomoâdnyhaziatskojčastiRossii [Genetic variety of hantaviruses in populations of rodents and insectivores in Asian Russia]. Dissertation. Novosibirsk: State Research Center of Virology and Biotechnology VECTOR, 2012.

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MATHEMATICAL MODELING OF CONTAMINATION ZONES OF HIGHWAY ROADSIDES BY HEAVY METALS

Authors:

Irina I. Kosinova,Svetlana I. Fonova,Gennadii V. Zibrov,Vadim P. Zakusilov,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00006

Abstract:

The urgency of the problem under consideration in modern conditions is determined by the leading influence of road transport in polluting the components of the surrounding environment. Previous scientific developments focus mainly on the assessment of the effect of gaseous emissions; an estimate of the intensity of heavy metal contamination in the form of aerosols is practically absent. The article is aimed at developing a method for assessing the contamination of roadside areas with heavy metals contained in emissions and waste from moving vehicles. The leading method in the study of this problem was the mathematical model and methodology for estimating the aerosol contamination of the atmosphere by heavy metals on the basis of experimental studies of atmospheric pollution and pollution of soils at 240 locations along the profiles on the M-4 autoroute. The total number of samples analyzed was 840 units. The mathematical model took into account the meteorological indicators and the integral indicator of soil contamination atthe depth of 1m. It was revealed that the main pollution is observed at a distance of up to 10 m from the roadway edge, which confirms the developed model and methodology. Copper, lead, zinc, and cadmium were singled out as the main pollutants.The scale of the index of environmental risk categories based on the specified total contamination index of the roadside area was developed. Based on the research results it was recommended to locate economic activities at distances more than 25 m from the roadway edge. The materials of the article can be useful for scientists in the field of environmental protection, as well as for environmental organizations that make decisions on the feasibility of practical and economic development of first-order highway roadside areas

Keywords:

Heavy metals (HM),aerosol pollution,roadside area.,

Refference:

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XI. Ilyash, V.V. Functional zoning of territories in ecological-geological studies (on the example of the Sitov site of the Sokolsky-Sitovskoe limestone deposit) [Funktsional’noyezonirovaniyeterritoriypriekologo-geologicheskikhissledovaniyakh (naprimereSitovskogouchastkaSokol’sko-Sitovskogomestorozhdeniyaizvestnyakov)]/V.V. Ilyash, N.V. Krutskikh, A.A. Sakharova, N.I. Sambulov // Bulletin of Voronezh University. – 2002. – No.1. – P. 248-253.

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DEVELOPING A METHODOLOGY FOR ASSESSING TECHNICAL AND ECONOMIC INDICATORS FOR EFFECTIVE CHANGE MANAGEMENT IN THE ENTERPRISE

Authors:

Anton B. Petrochenkov,Natalia A. Gergel,Oleg A. Vshivkov,Aleksandr V. Romodin,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00007

Abstract:

Today, ongoing improvement of business processesis required to enhance the efficiency and competitiveness of the enterprisedue to the high volatility of the market, increased competition, and scientific and technological progress. This article is devoted to challenges facing effective change management in industrial enterprises and aims to devise a methodology for effective change management. The significance of this research topic lies in the fact that there is still insufficient discussion of effective change management in industrial enterprises, especially those in which outsourcing services are diverted or are being diverted from the energy, automation, mechanics, and IT departments. As of now, change management only starts to shape itself into a distinct area of research and one of the leading approaches to its study is evaluating the enterprise activity on the basis of the Shewhart-Deming cycle. This paper examines different levels and approaches to change management. A methodology is developed to create effective change management aimed at helping calculate the economic efficiency of projects. Popular economic indicators were systemized and evaluated in terms of their applicability from a regional perspective. Training of specialists who will work in these changing conditions is another focus of attention.

Keywords:

Change management,project management,levels of change management,, the Shewhart-Deming Cycle,

Refference:

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ENVIRONMENTAL ASSESSMENT OF HEAVY METALS CONTENTIN AGROECONOSIS OF CENTRAL CHERNOZEMIC ZONEOF RUSSIA

Authors:

Sergey V. Lukin,Sergey I. Smurov,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00008

Abstract:

The aim of the studies was to conduct an environmental assessment of heavy metals (Cr, Ni) content in agrocenoses of the forest-steppe zone in the southwestern part of the Central ChernozemicZone(CCZ). It was established in the course of the research, that the average gross content of nickel in the arable layer of chernozemic soil in the leached CCZforest-steppe zone was 24.9;average content ofchromiumwas 21.0 mg/kg.With an increase of the soil profile depth the gross content of heavy metals did not change. The average content of nickel and chromium mobile forms in the 0-20 cm layer was 0.63 and 0.44 mg/kg, respectively. The content of nickel mobile forms in the 81-100 cm layer was lower than in the arable layer; there was no significant change in the content of chromium with the depth of the soil profile. MPC surplus for heavy metals mobile formswas not observed. The biological absorption factor for the main and by-products of the studied agricultural crops for nickel was in the range of 0.20-3.98; and 0.15-0.88 for chromium. The main sources of the studied elements entering the agrocenoses of the Belgorod region were organic fertilizers. The application rate of organic fertilizers on average for the years of 2010-2013 was 3.95 t/ha, wherein 86.5% of nickel and 81.0% of chromium were supplied to agrocenoses.

Keywords:

Balance,biological absorption factor,heavy metals,nickel,chrome,plants,chernozem. ,

Refference:

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XII. Lukin S.V. Dynamics of the Agrochemical Fertility Parameters of Arable Soils in the Southwestern Region of Central Chernozemic Zone of Russia // Eurasian Soil Science, 2017, Vol. 50, No. 11, pp. 1323–1331. DOI: 10.1134/S1064229317110096
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ENVIRONMENTAL ASSESSMENT OF THE TRACE ELEMENTS CONTENTIN THE AGROCOENOSIS OF CENTRAL CHERNOZEMREGIONS OF RUSSIA

Authors:

Sergey V. Lukin,Sergey I. Smurov,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00009

Abstract:

The purpose of this study is to conduct an environmental assessment of zinc, copper and cobalt content in the agrocoenosisof forest-steppe zone of the Central Chernozemregions(CCRs) of Russia.During the investigations it was revealed that the average gross content of zinc is 37.1.copper - 13.8.cobalt - 7.74 mg/kg in arable soils ofthe leached chernozem of forest-steppe zone of the CCRs. With increasing depth of the soil profile, the gross content of zinc and copper is significantly reduced, and cobalt gross content is not changed. According to the results of a continuous survey conducted in 2010-2014, it was found that 99.2% of the arable soils of Belgorod region are characterized by low provision of mobile forms of zinc, 96.8% of copper, and 94.3% of cobalt. According to the results of local monitoring, it was revealed that the content of mobile forms of cobalt and copper in the 81-100 cm layer is significantly lower than in the arable soil, and the zinc content does not change significantly. The exceeding MPC for mobile forms of trace elements was not observed.For the main products of winter wheat, pea, soybean, sunflower and corn, the biological absorption factors of zinc were in the range of 2.9-42.2, copper - 4.36-42.0, cobalt - 0.38-2.7,and for the by-products - 1.1-6.3, 1.8-4.63, and 0.16-1.54, respectively. The main source of trace elements entering the agrocoenosis of Belgorod region are organic fertilizers.

Keywords:

Balance,percent abundance,trace elements,motile forms,cobalt, copper,zinc,chernozem,

Refference:

I. Chekmarev P.A., Sidorov A.V., and Moiseev A.A. (2017) Fertility dynamics of arable soils in the Republic of Mordovia // Achievements of the AIC science and technology, Vol. 31, No. 1, pp. 4-9.

II. Cherkasov E.A., KulikovaA.Kh., and Lobachev D.A. (2017) Fertility dynamics of soils in Ulyanovsk region for years 1965-2015. // Achievements of the AIC science and technology, No. 4, pp. 10-17.

III. ChernykhN.N., and Sidorenko S.N. (2003) Environmental monitoring of toxicants in the biosphere. М.: Publishing House of the Peoples’ Friendship University, 430 p.

IV. Chetverikova N.S. (2013) Environmental assessment of the impact of intensive agricultural activities in the state of agro-ecosystems in the forest-steppe zone of the Central Chernozem region: thesis for a doctor’s degree in Biological Sciences. М.: Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, 22 p.

V. GoryanikovYu.V.,KalakhanovaV.Yu., and Tamova E.V. (2017) Agro-chemical and ecological-toxicological condition of soils, the effectiveness of chemicals using in the Karachay-Cherkess Republic // Achievements of the AIC science and technology, Vol. 31, No. 8, pp. 23-27.

VI. Kabata-Pendias A. Trace Elements in Soils and Plants. – 2011, 41 p.

VII. Khizhnyak R.M. (2016) Environmental assessment of the content of trace elements (Zn, Cu, Co, Mo, Cr, Ni) in Agroecosystems of forest-steppe zone, southwestern part of the CCRs: thesis for a doctor’s degree in Biological Sciences. М.: Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, 24 p.

VIII. Konarbaeva G.A., and Yakimenko V.N. (2017) Changes in the content of heavy metals in agrocenosis at different intensities of mineral fertilizers use // Achievements of the AIC science and technology, Vol. 31, No. 10, pp. 44-48.

IX. Korneiko N.I. (2008) Agroecological assessment of the change in the main indicators of the fertility of arable soils of the Central Chernozem Region at the long-term agricultural use: thesis for a doctor’s degree in Agricultural Sciences. Kursk: Kursk State Agricultural Academy named after Professor I.I. Ivanov, 22 p.

X. Lukin S.V. Dynamics of the Agrochemical Fertility Parameters of Arable Soils in the Southwestern Region of Central Chernozem Zone of Russia // Eurasian Soil Science, 2017, Vol. 50, No. 11, pp. 1323–1331. DOI: 10.1134/S1064229317110096.

XI. Lukin S.V., and Selyukova S.V. (2016) Agroecological assessment of the effect of organic fertilizers on the trace element based composition of soils // Achievements of the AIC science and technology, No. 12, pp. 61-65.

XII. Melentsova S.V. (2007) Agroecological assessment of the content of chemical elements (S, Zn, Mn, Cu, Cd, Pb) in soils of the forest-steppe and steppe zones (the case of Belgorod region): thesis for a doctor’s degree in Biol. Sciences. М.: Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, 22 p.

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XV. Sergeev A.P., LipatnikovaT.Ya., and Goreeva E.V. (2017) The fertility condition of arable soils in the southern zone of the Krasnoyarsk Territory // Achievements of the AIC science and technology, No. 4, pp. 17-21.

XVI. SheudzhenA.Kh.,Onishchenko L.M., and Prokopenko V.V. (2005) Fertilizers, ground soils and plant growth regulators. Maikop: State Unitary Enterprise of the Republic Adygea Republican Publishing and Printing Company “ADYGEA”, 404 p.

XVII. Soil cover and agrochemical characteristics of soils in Arkhangelsk region / G.E. Antropova, E.M. Romanov, E.A. Rokhina, E.N. Nakvasina // Achievements of the AIC science and technology. 2017, Vol. 31, No. 2. pp. 5-10.

XVIII. Unkanzhinov G.D., Boldyreva L.A., and Tertyshnaya A.G. (2017) Agrochemical characteristics of arable soils and the use of fertilizers in the Republic of Kalmykia // Achievements of the AIC science and technology, Vol. 31, No. 1, pp. 10-15.

XIX. Vedeneeva N.V., Rogov V.A., Nakleischikova L.V., and Naliukhin A.N. (2016) Soil cover and agrochemical characteristics of arable soils in Vologda region. Dynamics of soil fertility by cycles of agrochemical survey // Achievements of the AIC science and technology, No. 8, pp. 22-27.

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NUMERICAL MODELING OF DISCRETE COMPONENTS OF PRESSURE PULSATION SPECTRA IN BLADED PUMPS

Authors:

Sergey F. Timushev,Dmitry N. Klimenko,Sergey Yu. Fedoseev,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00010

Abstract:

Study of improving the reliability and lifetime of bladed pumps is now of great importance. In this context, the key objective is to reduce the hydrodynamic vibration of screw-centrifugal pumps caused by pressure pulsations in the pump outlet casing . Due to the flow stepwisenonuniformityat the impeller outlet, pressure pulsations emerge at the rotor blades passing frequency and its harmonics. These vibrations cause a dynamic load on the components of pump body causing its vibration, so the calculation of the pressure pulsations amplitude in the screw-centrifugal pump at the early stage of the design is a relevant task. When defining pressure pulsations generated by the three-dimensional vortex flow of the screw-centrifugal pump their dual nature should be considered. The heterogeneous distribution of the flow parameters at the outlet of the centrifugal impeller generates acoustic disturbances that are propagated at the speed of sound in the operating fluid. At the same time, there are vortex disturbances that are convected by the main flow. Vortex oscillations of the main flow parameters is called "pseudosound" or the vortex mode. This paper develops a three-dimensional acoustic-vortex method of calculating pressure pulsation, which provides the ability to determine the amplitude of acoustic mode. It shows the derivation of the acoustic and vortex equations and the calculation example of the pressure pulsations amplitude at the screw-centrifugal pump outlet with different guide channel design. It shows the ability of modeling the combinationcomponents in the spectrum of pressure pulsations.

Keywords:

Pressure pulsations,centrifugal pump,discrete component of blade passing frequency (BPF),,mixedharmonic, complex acoustic impedance,

Refference:

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THE SURFACE GRINDING OPTIMIZATION OF TITA-NIUM PARTS WITH DIFFERENT STIFFNESS GIVEN THE PROCESS STABILITY

Authors:

Yakov I. Soler,Dinh Si Mai,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00011

Abstract:

This paper considers improving the surface grinding of parts with different stiffness from the titanium alloy VT22 given the process stability based on the multi-criteria optimization according to the performance criteria. The part surface quality includes roughness, flatness deviations, microhardness, relative supporting portion of surface and standard deviation. The variation ranges of the process parameters are as follows: wheel speed vwh = 28m/min, longitudinal feed slong = 5 – 18 m/min, transverse feed str = 2 – 10 mm/ double stroke, depth of cut t = 0.005 – 0.02 mm, operational allowance z = 0.1 – 0.3 mm. It has been established that the optimal grinding conditions of completely rigid parts given the stability of the process, have not only reduced the standard deviation of the basic parameters by 1.7 times as compared with optimization without taking them into account, but also the basic time of transition by 1.6 times as compared with the recommended standards of grinding. When optimizing the pliable parts grinding (with stiffness j = 350 – 11,220 N/mm), the reduction of high-rise indicators of their surface roughness by 1 – 2 categorical magnitudes, the standard deviation by 2 times, the basicmachining time by 1.2 times for the rough stage, and by 1.2 – 3.3 times for the finishing stage compared to the grinding of the completely rigid parts has been noted. The non-rigid parts of titanium alloys should be ground in the longitudinal direction of its variation (by vector slong). It has been determined that the optimum grinding condition of non-rigid parts allows reducing the main operation time by 4.9 times compared to the standard specifications for completely rigid parts, mainly by increasing t and reducing z. The results obtained should be used in the robust design of grinding operations.

Keywords:

Grinding,optimization, process stability,non-rigid parts,titanium alloy,surface topography,

Refference:

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II. Binu Thomas, Eby David, Manu R. Modeling and optimization of surface roughness in surface grinding of SiC advanced ceramic material // All India manufacturing technology, design and research conference. 2014: 1(311)–7(311).

III. Brinksmeier E., Aurich J.C., Govekar E. et al. Advances in modeling and simulation of grinding processes // CIRP Annals-Manufacturing Technology. 2006; 2 (55): 667–696.

IV. Campa F.J., De Lacalle L.L., Urbikain G. et al. Definition of cutting conditions for thin-to-thin milling of aerospace low rigidity parts. In: Proceedings of the ASME International Manufacturing Science and Engineering Conference, MSEC. 2008: 359-368.

V. Chaplygin B.A., Butorin G.I. A new generation of the standardized rules of the cutting modes performed on grinding and finishing machines//Bullitin of Nosov Magnitogorsk State Technical University. 2012; 1: 61–66.

VI. Cutting conditions for works performed on grinding and finishing machines with manual control and semi-automat: Reference book / Under the editorship of D.V. Ardashev, D.E. Anelchik, G.I. Butorin and others. Chelyabinsk: Publishing house ATOKSO, 2007.

VII. GOST 25142-82. Surface roughness. Terms and definitions. Entered 83-01-01. Moscow: Publishing house, 1982.

VIII. GOST 24642-81. Tolerances of form and position. Main terms and definitions. Replaced GOST of 10356-63 (in part of section I and II). Entered 01-07-81. Moscow: Standards Publishing House,1981.

IX. GOST 24643-81. Tolerances of form and position. Numeric values. Replaced GOST of 10356-63 (in part of section 3). Entered 01-07-81. Moscow: Standards Publishing House, 1981.

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XI. Isakov D.V. Testing procedure of grinding wheels for obtaining data to design grinding operations//Materials cutting technology. 2010; 3 (57): 2–11.

XII. Khavina I.P., Limarenko V.V. Optimization of machining processes using neural networks//Systems of information processing. 2015; 10: 258–260.

XIII. Liao T.W., Chen L.J. A neural network approach for grinding processes: Modeling and optimization. Int J Mach Tools Manuf. 1994; 7(34): 919–937.

XIV. Machine-building time standards for operations carried out on grinding and finishing machines using the computer-aided technical rate setting//Large-batch and medium-batch production: In P. 3 Moscow: Publishing House CBPNT of the Institute of Labour. P. 1: Instructions for operation, 1985.

XV. Myers R.H., Montgomery D.C., Anderson-Cook C.M. Response Surface Methodology: Process and Product Optimization using Designed Experiments. John Wiley & Sons. New Jersey, 2009.

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XVII. Raju N.V.S. Optimization Methods for Engineers, 2014.

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SYNDROME OF PLACENTAL INSUFFICIENCY IN PREGNANT WOMEN WITH OBESITY

Authors:

Irina Savelyeva,Olga Shirokova,Elena Bukharova,Elena Galyanskaya, Irina Polyanskaya,Elena Krasnikova, NataliyaNosova,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00012

Abstract:

Researchers interest to the problem of extra genital diseases in mothers has increased during the past years. Obesity rate worldwide achieved the level of one of the most significant problems in XXI century. The Purpose of the Study: Evaluation of placental insufficiency syndrome risk development in pregnant women with obesity. Materials and Methods: Prospective controlled study enrolled 494 patients. The 1st group included 262 patients with obesity (mean body weight index 33.1 (31.4; 35.9) kg/m2), aged 30 (27; 34) years old. The 2nd group (control) included 232 patients with normal body weight (mean body weight index 22.6 (21.0; 23.8) kg/m2) aged (25; 31.5) years old. The authors evaluated anthropometric data, conducted coagulotests, assessed lipid and carbohydrate metabolism, performed fetometry and Dopplerometry. All the patients had their level of human placenta growth factor identified (PlGF, pg/ml) in blood serum. Morphological study of secundines was conducted. Results. It was defined that pregnant women with obesity had low level of P1GF in comparison with the women in the control group (р<0.01). Critical level of PlGF in prognosis of placental insufficiency development is considered to be lower than 100 pg/ml. Morphological study of secundines from delivered women with obesity showed significantly higher rate of placenta maturation disorders at low level of  P1GF. Conclusion: In pregnant women with obesity the level of P1GF on the 8-9th week of gestation was lower in comparison with the control group. The level of PlGF lower than 100 pg/ml at obesity in mother is considered as a marker of placental insufficiency development risk, which is confirmed by the morphological study of secundines.

Keywords:

Obesity, placental growth factor, placental insufficiency, lipid metabolism,

Refference:

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STUDY OF INTERRELATIONS OF THE BIOELEMENT STATUS OF MOTHER AND FETUS AT CATTLE

Authors:

Anton E. Chernitskiy,Tatiana S. Skogoreva,Vladimir A. Safonov,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00013

Abstract:

Determination of the concentration of chemical elements in the switch hair of   cattle in the ‘dam-newborn calf’ pairs is a non-invasive method to determine the bioelemental status of calves formed within the last three month of embryofetal development and its effect by the maternal bioelemental status. The study purpose is to examine the correlation between the bioelemental status of clinically healthy cows and their calves. 35 clinically healthy red-and-white cows and their offspring were the objects. In 2015 switch hair samples were obtained from 35 clinically healthy red-and-white cows and their calves located at a large cow unit soon after calving and the concentration of 12 chemical elements (iron, zinc, copper, manganese, molybdenum, cobalt, chromium, selenium, nickel, arsenic, strontium and cadmium) were determined by the atomic absorption spectroscopy (Shimadzu AA6300, Japan). The analytic expressions describing the dependencies of the accumulation of chemical elements in the embryo’s switch hair on the maternal bioelemental status of the dam were obtained. Statistically significant dependencies with the level of α = 0.05 were found for selenium, copper, cadmium and cobalt. The current level of α significance for zinc, iron, strontium, chromium, nickel, arsenic and manganese was 0.10...0.15. No statistically significant dependence was found between the concentration of molybdenum in the switch hair of newborn calves and their dams. The lack of СТ-Мо(СК-Мо) dependence shows that the level of molybdenum accumulated in a calf’s body within the last three months of embryofetal development almost does not depend on the elemental status of its dam (the last one was judged on the basis of molybdenum concentration in hair samples taken from the cows). The following concentration intervals were set for the examined elements in the switch hair of cows that ensure the optimal level of their accumulation in calves: from 97 to 117 mg/kg for zinc, from 5.2 to 9.3 mg/kg for copper, from 11.8 to 13.7 mg/kg for manganese, from 40 to 155 µg /kg for cobalt, from 8.5 to 11.5 µg /kg for chromium, from 230 to 370 µg /kg for selenium, from 0.2 to 0.4 mg/kg for nickel, from 80 to 170 µg /kg for arsenic, from 6.0 to 8.6 mg/kg, from 0.10 to 0.62 mg/kg for cadmium. The study results are of practical values for those specializing in veterinary and animal science as they enable to prognosticate the disturbances of bioelemental nutrition of cow’s fetus and provide for their timely correction

Keywords:

Cattle,hair analysis,atomic absorption spectroscopy,microelements,dam-newborn calf pairs,

Refference:

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USING EARTH REMOTE SENSING DATA TO CONTROL CHANGES IN WATER STORAGE BASIN COAST LINE

Authors:

Alexeyi V. Dubrovskiy,Olesya I. Malygina,Viktor N. Moskvin,Tamara V. Vereshchaka,Valery I. Tatarenko,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00014

Abstract:

The modern organisation of infrastructural facilities and industrial complexes shall be environmentally safe and economically effective.  The article poses the problem of creation of a system for the efficient use of and control over the state of water storage basins using geotechnology and Earth remote sensing systems.  The Novosibirsk Water Storage Basing, Novosibirsk, Russia is taken as an example.  Over the explored area of the water basing, the environmental situation is worsening as a result of the progressing wind and wave erosion of the coast line and intensive washout of soil, plants, trees, chemical fertilisers etc.  The article reasonably introduces the concept of technogenic natural territorial complexes (TNTC).  By Earth remote sensing, the speed of soil erosion along the whole coast line of the basin is determined.  Soil exploration and typing provided materials for a forecast model of wearing away of the coast line. The plots for geodynamic monitoring and data acquisition periods are defined.  The need for bank-protection works and a wider recreational use of the basing water is stated.

Keywords:

Satellite monitoring,technogenic natural territorial complexes,land resources,unmanned aerial vehicles,digital economy,water bodies,

Refference:

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CHAOTIC MODES OF A NON-LINEAR FRACTAL OSCILLATOR

Authors:

Roman I. Parovik,

DOI:

https://doi.org/10.26782/jmcms.spl.10/2020.06.00015

Abstract:

A non-linear fractal oscillator is a generalization of a classical non-linear oscillator in consideration of the hereditary or the memory effect. The memory effect is a property of a dynamic system in which its current state depends on a finite number of its previous states. Therefore, a non-linear fractal oscillator can be mathematically described using integro-differential equations with difference kernels or fractional order derivatives.   In this paper, a fractal non-linear oscillator has been investigated to identify chaotic oscillatory modes. The quantitative measure of chaotic regimes is the largest (maximal) Lyapunov exponents. For calculating the maximal Lyapunov exponents, the Wolff algorithm based on the Gram-Schmidt orthogonalization procedure has been selected, using both numerical solutions for an initial fractal dynamical system by using variational equations. The Wolff algorithm also makes it possible to plot the spectrum of Lyapunov exponents as a function of control parameters for the initial dynamical system.  It has been shown that some spectra of Lyapunov exponents contain positive values indicating the existence of chaotic modes, which are also confirmed by the corresponding phase trajectories.

Keywords:

Maximal Lyapunov exponents,Wolff algorithm,Gram-Schmidt orthogonalization,chaotic strange attractor,boundary cycle,spectrum of Lyapunov exponents,non-linear fractal oscillator,Gerasimov-Caputo derivative,

Refference:

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