A method for constructing an airfoil using a specified chord velocity diagram

A problem of determining a shape of the airfoil being streamlined by a potential incompressible inviscid flow is solved by the successive approximation method using a specified chord velocity diagram. It is shown that a closed airfoil that possesses a specified chord velocity diagram can be constructed with a sufficient accuracy; if the chord diagram is unsuccessfully specified, the closed airfoil may prove to be not univalent, that is, physically unrealizable. © 2009 Allerton Press, Inc

Influence of words in the sentence on the communicative function of a language (exemplified by the Russian and tajik languages)

A necessity in the development of the comparative grammar of the Russian and Tajik languages and a need in solving of many disputable issues of the syntactic knowledge, moreover, the lack of fundamental researches on comparative studying of the words order in Russian and Tajik allows to define our research as for actual. The objectives of the article are studying of the words order in Russian and Tajik within comparative and typological aspects formulization of peculiarities of interaction between the structural-grammar and actual aspects of studying of words order in sentences of the languages themselves. In order to achieve the objectives, the authors used a method of direct observation of word arrangement in texts when expressing the grammatical and logical base of the sentence; linguistic experiment the content whereof is various types of transformation; comparative method by means whereof differences are exposed in communicative structures of analyzed sentences, statements and types of words order in sentences and statements and descriptive method. Studying of variants of syntactic structures in the two languages expose national specificity of the semantics of the verbal execution of a statement in these consistencies/inconsistencies. The results allow expansion of theoretical knowledge of the role of words order and other means of actual articulation of a sentence in the Russian and Tajik languages as well as working out the theory of words order in sentences, the communicative structure of a sentence and functional grammar. © 2019, Slovenska Vzdelavacia Obstaravacia. All rights reserved

Actualization of a statement through order of the sentence (the Russian and Tajik languages)

The objective of the article is examining the words order in an utterance of the Russian and Tajik languages in comparative and typological aspects; revealing peculiarities of the structural-grammatical and actual aspects of studying the words order in sentences of the compared languages, depending whereon regular laws of rigidity or flexibility of the words order and linear-dynamic structures of a sentence in the compared languages are established, which allows to take a fresh look at the issue of interaction between the communicative and constructive structures in the languages under study (Russian and Tajik) and to determine the role of various means of expressing the words order in forming different types of information in the Russian and Tajik languages. Materials and methods: descriptive method; linguistic experiment integrating various types of transformation; comparative method revealing differences of communicative structures of reviewed sentences, verbal statements, types of words order in sentences and statements; direct observation method implying observing arrangement of words in texts when expressing the grammatical and logical base of a sentence. Tables presented in the article reflect the basic models of words order in the Russian and Tajik languages which are necessary in practical teaching of the both languages. Practical significance lies in expansion and deepening of theoretical knowledge of the role of words order and other means of actual articulation of a sentence in the Russian and Tajik languages; in formation of communicative competence and practical skills in process of professional teaching of translators and editors, and also in working-out of the general theory of words order in sentences, communicative structure of a sentence and functional grammar, which is one of leading lines of researching of the sentence in the modern linguistics. © 2018 by the authors

Sanitary status of the Eurasian wild grapevine in the South Caucasian region

A prospecting on the sanitary status of the aerial organs and roots of the Eurasian wild grapevine, Vitis vinifera L. ssp. sylvestris (Gmelin) Hegi, was carried out on 14 natural populations situated along river bank forests, floodplains and colluvial positions in Georgia (Marneuli, Mtskheta and Gori districts, Gardabani Protected area and Lagodekhi Reserve), Armenia (Akhtala and Tavoush regions) and Azerbaijan (Quba region). These zones are included within the Holarctic kingdom, Eurosiberian region, and to the Caucasian, Euxine and Hyrcanian biogeographical provinces. The results of study indicate that roots are free of symptoms caused by phylloxera, rot fungi and root-knot nematodes. Symptoms caused by the erineum strain of Colomerus vitis (Pagenstecher) and Calepitrimerus vitis (Nalepa) (Acari, Eriophyidae) are frequent. On the other hand, damages caused by powdery and downy mildews, Erysiphe necator (Schweinitz) Burrill and Plasmopara viticola (Berkeley and Curtis) Berlease and de Toni), respectively, show an irregular intensity on leaves belonging to different vines from each location

Сравнительное изучение влияния производных адамантана на поведение мышей CD-1 c разным фенотипом устойчивости внимания

   The effect of memantine (1 and 10 mg/kg/day), ladasten (50 mg/kg/day) and cyclantane (10 mg/kg/day) on the behavior of CD-1 mice differing in the phenotype of attention stability in the "closed enriched cross maze" test after three days of intraperitoneal administration was studied. It was found that in a subpopulation of mice with an initial attention deficit, these aminoadamantane derivatives partially restored the level of attention. The drugs equally worsened attention in a subpopulation with an initially high attention index by 40–47 % relative to the control, which indicates the absence of selectivity of the effect of these drugs with respect to attention deficit. However, this effect was not accompanied by a change in exploratory and locomotor activity, which makes it possible to make an assumption about the prospects for further study of the pharmacological effects of adamantane derivatives and optimization of their dose and duration of administration.   Изучено влияние мемантина (1 и 10 мг/кг/день, в/б), ладастена (50 мг/кг/день, в/б) и циклантана 10 мг/кг/день, в/б) на поведение мышей CD-1, различающихся по фенотипу устойчивости внимания в тесте «закрытый обогащённый крестообразный лабиринт», после трёхкратного внутрибрюшинного введения. Установлено, что в субпопуляции мышей с исходным дефицитом внимания частично эти производные аминоадамантана восстанавливали уровень внимания. Препараты в равной степени ухудшали внимание в субпопуляции с исходно высоким индексом внимания на 40–47 % относительно контроля, что свидетельствует об отсутствии избирательности эффекта этих производных адамантана в отношении дефицита внимания. Однако данное воздействие не сопровождалось изменением исследовательской и локомоторной активности, что позволяет сделать предположение о перспективности дальнейшего изучения фармакологических эффектов производных адамантана и оптимизации их дозы, и продолжительности введения

Использование препаратов с цереброваскулярной активностью у мышей со сниженным уровнем внимания

The effect of picamilon (50 mg/kg/day), tropoxin (10 mg/kg/day) and LK-933 (9,3 mg/kg/day) on the behavior of CD-1 mice phenotypes with different attention stability in the "closed enriched cross maze" test after 6 days of intraperitoneal administration was studied. It was shown for the first time that in mice with native attention deficit drugs with nootropic and cerebrovascular activity improved attention. Observed effect was combined with changings of exploratory behavior parameters, motor activity and anxiety in both mice subpopulations. Obtained results allow to make an assumption about further experimental study of drugs with cerebrovascular properties in the attention deficit disorder model proposed by the authors.Изучено влияние пикамилона (50 мг/кг/день, в/б), тропоксина (10 мг/кг/день, в/б) и ЛК-933 (9,3 мг/кг/день, в/б) на поведение фенотипов мышей CD-1 с различной устойчивостью внимания в тесте «закрытый обогащённый крестообразный лабиринт», после 6-кратного внутрибрюшинного введения. Впервые показано, что у мышей с нативным дефицитом внимания препараты, обладающие ноотропной и цереброваскулярной активностью, способствовали восстановлению внимания. Обнаруженный эффект сопровождался изменениями показателей исследовательского поведения, дви­гательной активности и тревожности у обеих субпопуляций грызунов. Полученные результаты позволяют сделать предположение о необходимости дальнейшего экспериментального изучения влияния препаратов с цереброваскулярными свойствами с использованием предложенной авторами модели синдрома дефицита внимания