Invariant Form of BK-factorization and its Applications

Invariant form of BK-factorization is presented, it is used for factorization of the LPDOs equivalent under gauge transformation and for construction of approximate factorization simplifying numerical simulsations with corresponding LPDEs of higher orderComment: 11 pages, 7 figure

Nonlinear acoustic waves in channels with variable cross sections

The point symmetry group is studied for the generalized Webster-type equation describing non-linear acoustic waves in lossy channels with variable cross sections. It is shown that, for certain types of cross section profiles, the admitted symmetry group is extended and the invariant solutions corresponding to these profiles are obtained. Approximate analytic solutions to the generalized Webster equation are derived for channels with smoothly varying cross sections and arbitrary initial conditions.Comment: Revtex4, 10 pages, 2 figure. This is an enlarged contribution to Acoustical Physics, 2012, v.58, No.3, p.269-276 with modest stylistic corrections introduced mainly in the Introduction and References. Several typos were also correcte

Formation and development of the system of public affairs institutes: governmental administrative aspect

The article states that formation and development of the public affairs institutes from the position of the state administration have to be dealt with as a polisystematic and polistructural result of intergration of many spheres of society viability maintenance with the following functionally related specific complexes: logistical, economic, social, domestic and cultural. The author proves that they are organizationally combined from the political and ideological position to create a certain sphere – the sphere of housing and municipal services that constitutes the system of structures contributing to the functioning of housing and utilities sector. It is defined that modernization of the housing and utilities sector provides for the complex of political, economic, research, educational, institutional and management, as well as technically preventative measures aimed at realization of citizens’ rights to civilized housing and utility conditions as the determining factor of reproduction of a human and society

Crisis management in theory of public administration

Main principles of strategic public administration in terms of crisis forming considered; especially attention focused on the aspect of the anti-crisis management effectiveness from point of view the necessity adopting of it for public administration and state regulation of economic

Quaternary palynostratigraphy of the Pechora Sea

By combining the lithologic, original palynologic and published micropaleonthological data we reconstructed paleogeographical events On the Pechora shelf during the Younger Dryas and Holocene time. Our paleoenvironmental reconstructions are based On the regularities in formation of pollen-and-spores assemblages in the surface sediments of the Pechora Sea. The main stages in paleogeography of the Pechora Sea during the Late Pleistocene were emphasized. The Late Valdai sediments in the Pechora Sea region were accumulated under the influence of fluvioglacial flows probably from the melting ice cap on Kolguev Island and, also, coastal glaciers. Climate deterioration considerably changed coastal vegetation as reflected in the depleted taxonomic and quantitative composition of palynospectra. The pollen data suggest that Open steppe-like plant communities with Artemisia, Poaceae, Asteraceae and Caryophyllaceae dominated dry ecotopes On watersheds, whereas tundra-like communities with Betula nana, arctic Salix, Dryas, Saxifraga, Carex and Brassicaceae were common in more humid coastal lowlands. The overlying silts and loamy sands are believed to have been accumulated during early deglaciation, i.e., Older Dryas and Alleröd. During this phase the glacial sedimentation was rather rapidly replaced by a glaciomarine deposition. Progressive climate warming caused prominent changes in coastal vegetation. Discontinuous treeless tundra-steppe associations were replaced by dwarf and shrub ernik tundra. A "complex vegetation cover" of forest-tundra apparently existed in the northern part of the Kola Peninsula and in the Northern Dvina Lowland. By the end of the Alleröd alder-bushes and horsetails occupied riverbanks, and spruce occurred in the forest-tundra communities on the adjacent hinterland

Aeroacoustics of the swinging corrugated tube: Voice of the Dragon

When one swings a short corrugated pipe segment around one’s head, it produces a musically interesting whistling sound. As a musical toy it is called a “Hummer” and as a musical instrument, the “Voice of the Dragon.” The fluid dynamics aspects of the instrument are addressed, corresponding to the sound generation mechanism. Velocity profile measurements reveal that the turbulent velocity profile developed in a corrugated pipe differs notably from the one of a smooth pipe. This velocity profile appears to have a crucial effect both on the non-dimensional whistling frequency (Strouhal number) and on the amplitude of the pressure fluctuations. Using a numerical model based on incompressible flow simulations and vortex sound theory, excellent predictions of the whistling Strouhal numbers are achieved. The model does not provide an accurate prediction of the amplitude. In the second part of the paper the sound radiation from a Hummer is discussed. The acoustic measurements obtained in a semi-anechoic chamber are compared with a theoretical radiation model. Globally the instrument behaves as a rotating (Leslie) horn. The effects of Doppler shift, wall reflections, bending of the tube, non-constant rotational speed on the observed frequency, and amplitude are discusse

Human Motion Trajectory Prediction: A Survey

With growing numbers of intelligent autonomous systems in human environments, the ability of such systems to perceive, understand and anticipate human behavior becomes increasingly important. Specifically, predicting future positions of dynamic agents and planning considering such predictions are key tasks for self-driving vehicles, service robots and advanced surveillance systems. This paper provides a survey of human motion trajectory prediction. We review, analyze and structure a large selection of work from different communities and propose a taxonomy that categorizes existing methods based on the motion modeling approach and level of contextual information used. We provide an overview of the existing datasets and performance metrics. We discuss limitations of the state of the art and outline directions for further research.Comment: Submitted to the International Journal of Robotics Research (IJRR), 37 page

SEASONAL AND SPECIFIC FEATURES HEMATOLOGIC PROFILE IN POND FISH

Досліджували вміст гемоглобіну, кількість еритроцитів та величину гематокриту, а також вираховували індекси крові, використовуючи комплекс рутинних гематологічних методик. Мета досліджень полягала у з’ясуванні сезонних та видових особливостей гематологічного профілю у ставових риб: коропа рамчастого, коропа лускатого і сазана впродовж річного циклу їх вирощування.Проведеними дослідженнями встановлено, що кількість еритроцитів, вміст гемоглобіну, гематокритна величина та середня концентрація гемоглобіну в еритроциті у крові коропа лускатого і рамчастого та сазана у літній період і, особливо, в осінній значно більша (р<0,05–0,001), ніж на початку весняного періоду. Отримані результати досліджень свідчать про значне зниження киснево-траспортної функції крові у риб у зимовий і на початку весняного періодів, порівняно з літнім і осіннім періодами.Стосовно видових особливостей гематологічних показників у досліджуваних коропових риб упродовж річного циклу вирощування істотних різниць не встановлено.Констатовано, що гематологічний профіль у коропа рамчастого, коропа лускатого і сазана впродовж річного циклу вирощування більшою мірою залежать від сезонних чинників, ніж видових.Исследовали содержание гемоглобина, количество эритроцитов и величину гематокрита, а также вычисляли индексы крови, используя комплекс рутинных гематологических методик. Цель исследований заключалась в выяснении сезонных и видовых особенностей гематологического профиля в прудовых рыб: карпа рамчастого, карпа чешуйчатого и сазана в течение годового цикла их выращивания.Проведенными исследованиями установлено, что количество эритроцитов, содержание гемоглобина, гематокритная величина и средняя концентрация гемоглобина в эритроците в карпа чешуйчатого, рамчатого и сазана в летний период и,особенно, в осенний значительно больше (р<0,05-0,001), чем в начале весеннего периода. Полученные результаты исследований свидетельствуют о значительном снижении кислородно-транспортной функции крови у рыб в зимний и в начале весеннего периодов, по сравнению с летним и осенним периодами.Относительно видовых особенностей гематологических показателей в исследуемых карповых рыб в течении годового цикла их выращивания существенных различий не установлено.Констатировано, что гематологический профиль у карпа рамчатого, карпа чешуйчатого и сазана в течение годового цикла выращивания в большей степени зависят от сезонных факторов, чем от видовых.The content of hemoglobin, number of erythrocytes and hematocrit value and blood indices calculated using a complex routine hematological technique was investigated. The aim of the research was to clarify the specific features seasonal and specific features hematologic profile in pond fish: naked carp, scaly carp and carp during the annual cycle of cultivation.Conducted research found that the number of erythrocytes, content of hemoglobin, hematocrit value and average concentration of hemoglobin in the blood and squamous carp and frame carp in the summer and especially in the autumn is much greater (p <0,05-0,001) than early spring period. A significant decrease in the oxygen-trasport function of blood in fish in the winter and early spring, compared to the summer and autumn was obtained.Concerning the specific features of hematological parameters studied in carp fish during the annual cycle of growing significant differences not installed.Stated that hematological profile in frame carp, squamous carp and carp flake during the annual cycle of growing more dependent on seasonal factors than species