18,063 Works

The analysis of seasonal and long-term dynamics of the vegetative NDVI index in the territory of the State Nature Reserve “Nurgush”

A. Adamovich T., Kantor G. Ya., Ashikhmina T. Ya. & P. Savinykh V.
Results of studying the NDVI (Normalized Difference Vegetation Index) dynamics for identification and mapping land vegetation according to satellite data of Landsat in the territory of the State nature reserve “Nurgush” in Kirov Region of Russia are given. The features of the proposed approach include the estimation of the values of this spectral index separately for pine, deciduous forests and meadow phytocenoses. The choice of these natural objects is based on their different sensitivity to...

Reactions of pro- and eukaryotic microorganisms to the action of synthetic surfactants (review)

I. Domracheva L. & S. Simakova V.
The analysis of scientific publications shows that such pollutants as synthetic surfactants, brought into the environment with technogenic and domestic pollution, can have a very strong effect on the development of microorganisms of different systematic groups: bacteria, algae and fungi. The diversity of water and soil microflora and the diversity of pollutants do not allow the creation of a solid concept of the evolution of microbial communities under the influence of synthetic surfactants, since these...

Курс лекций по Теории Вероятностей

Ольга Евгеньевна Щербакова
Курс лекций соответствует образовательному стандарту высшего образования Федерального государственного автономного образовательного учреждения высшего образования «Санкт-Петербургский политехнический университет Петра Великого» и читался бакалаврам ИКНТ и ИФНИТ по дисциплине «Теория Вероятностей». Представлен классический курс Теории Вероятностей. В первой главе описана история становления теории вероятностей на примерах раскрытия парадоксов, возникавшихна ее пути. В курсе идет аксиоматическое построение вероятностного пространства и с этой позиции рассматривается классическая и геометрическая вероятность. Основными объектами в курсе являются случайные величины и их последовательности....

Оформление и защита выпускной квалификационной работы бакалавра

Светлана Владимировна Несмелова, Алла Алексеевна Смоленцева & Наталья Валерьевна Барсукова
В пособии изложены правила оформления выпускных квалификационных работ в соответствии с требованиями стандартов ЕСКД, СПДС, СИБИД, а также порядок их подготовки и защиты; приведены сведения о структуре и содержании работы, примеры оформления титульного листа, задания, списка использованных источников, отзыва руководителя и рецензии.

Выпускная квалификационная работа магистра

Наталья Валерьевна Барсукова & Светлана Владимировна Несмелова
В пособии изложены общие требования к структуре выпускной квалификационной работы магистра, требования ее к оформлению, порядок подготовки и защиты выпускной квалификационной работы в соответствии с «Положением о порядке проведения государственной итоговой аттестации». Приведены примеры оформления титульного листа, задания, реферата, списка использованных источников, отзыва руководителя и рецензии.

An approach to the gravity model: commercial relations between Spain and Russia

Eduardo Pérez De Lara Y Sánchez
The gravity model is a simple model developed, in 1962, by the Dutch economist Jan Tinbergen (the first Nobel laureate in Economics) and used in international economics to forecast (or ex-tract) issues regarding the trading between two countries. In this case: SPAIN and RUSSIA.

An Outstanding Scientist and Organizez of Sciense (on the ossasion of the 65th birthday of professor A.G. Kusraev)

S.V. Klimentov, A.O. Vatulian, Yu.F. Korobeinik, A.V. Abanin, M.I. Karjakin, Yu.A. Ustinov & S.N. Melikhov

EFFECT OF EXPERIMENTAL CHRONIC PAIN ON LEVELS OF BIOGENIC AMINES IN SKIN OF MICE IN DYNAMICS OF B16/F10 MELANOMA GROWTH

Inga M. Kotieva, Valeriya A. Bandovkina, Marina V. Blikjan, Elena M. Frantsiyants, Yuliya A. Pogorelova, Lidiya K. Trepitaki, Irina V. Kaplieva, Natal'Ya D. Cheryarina & Oleg I. Kit
Chronic pain is a prominent stressor with many neurotransmitters involved in its mechanisms. The greatest number of nociceptors is located in the skin, muscles and walls of blood vessels. The aim of the study was the determination of levels of biogenic amines in the skin of mice with chronic pain in the dynamics of experimental B16/F10 melanoma growth. Material and methods. The study included female С57ВL/6 mice (n=64) with transplanted B16/F10 melanoma divided into the...

LEVELS OF SOME VEGF FAMILY MEMBERS IN CLEAR CELL RENAL CELL CARCINOMA

Irina V. Neskubina, Aleksey N. Shevchenko, Anna A. Breus, Yuliya A. Pogorelova, Oleg I. Kit & Elena M. Frantsiyants
Aim. Comparable analysis of levels of VEGF-D, VEGF-A and VEGF-R1 in kidney tissues (tumor, its perifocal zone and intact tissues) in local and advanced clear cell renal cell carcinoma. Material and methods. 10% cytosolic fractions of kidney tissues (tumor, its perifocal zone and intact tissues) were studied. Levels of VEGF-D, VEGF-А and VEGF-R1 were determined by ELISA using standard test systems. Results. Comparable analysis of VEGF-D, VEGF-A, and VEGF-R1 levels in kidney tissues (tumor, its...

ASSESSMENT OF ENDOGENOUS INTOXICATION AND INDICATORS OF FREE RADICAL OXIDATION IN PATIENTS WITH BREAST CANCER AND PAGET’S CANCER

Ekaterina I. Surikova, Ljudmila A. Nemashkalova, Irina V. Neskubina, Elena I. Trindafilidi, Elena V. Shalashnaya, Jana V. Svetickaya, Oksana V. Bykadorova, Roza G. Luganskaya, Marina I. Vereskunova, Maksim N. Duritskiy, Ekaterina S. Bosenko, Oleg I. Kit, Ol'Ga V. Mhitar'Jan, Polina S. Kachesova & Irina A. Goroshinskaya
Syndrome of endogenous intoxication is among the most common syndromes in the practice of clinical oncology. Manifestations of endotoxemia in patients with cancer are multicomponent and are in interrelation with the free radical oxidative processes. The aim of the study was a comparative evaluation of endogenous intoxication and some indicators of free radical oxidation in patients with breast cancer and Paget's cancer. It has been established that in patients with breast cancer, along with a...

ESTIMATION OF ENVIRONMENTAL IMPACT OF DEEPENING AND WIDENING OF NAVIGABLE CANALS IN RIVER DELTAS

Valeriy I. Denisov, Alexandr D. Khovanskiy, Vladimir V. Latun & Oleg A. Khoroshev
The article presents the results of a comprehensive environmental impact assessment of possible ways to deepen and expand navigable canals, in particular, the Azov-Don Sea Channel (ADSC). The modern ecological situation is assessed, the aquatic landscapes are identified and their resistance to anthropogenic impact is determined, the degree of anthropogenic transformation, the ability to accumulate or dissipate pollutants, the main factors of the impact of dredging on the environment are assessed and their impact on...

GEOCHEMICAL FEATURES OF GOLD-QUARTS DEPOSITS OF OMCHAK ORE CLUSTER OF VERKHOYANSK-KOLYMA FOLDING REGION

Anna A. Astakhova, Alexander E. Khardikov & Viktor A. Sidorov
Geological and geochemical characteristics of gold-quarts formation objects and host complexes within the Omchak gold placers of Ayan-Juryakh anticlinorium of Verkhoyansk-Kolyma folding region are given. All objects localized in Permian sedimentary rocks. Localization of ore zones are controled by North-West faulting wich are zones of mylonization and graphitization. In ore objects there are veins and interlacing vein, mineralized crushing zones, areas of disseminated mineralization. Detected similarities in mineralogical complex of ore and veined minerals, stages...

Hysteresis of the soil water-retention capacity: estimating the scanning branches

Vitaly Terleev, Aleksandr Nikonorov, Roman Ginevsky, Viktor Lazarev, Issa Togo, Alex Topaj, Kirill Moiseev, Viktoriia Pavlova, Kasim Layshev, Mikhail Arkhipov, Aleksandr Melnichuk, Ielizaveta Dunaieva & Wilfried Mirschel
Designing of underground constructions, such as irrigation and drainage systems, requires engineering surveys. Such surveys include the study of the hydrological conditions of the territory, which are determined by the hydrophysical properties of soils, such as their water-retention capacity. The formation of a hysteresis loop for the soil water-retention capacity occurs because of the variability of meteorological conditions. It is almost impossible to measure all possible scanning branches that fill the gap between the main...

Numerical simulation of ventilated facades under extreme climate conditions

Mikhail Petrichenko, Evgeny Kotov, Darya Nemova, Darya Tarasova & Vitaly Sergeev
To reduce the costs of building operation, it is necessary to provide for the use of energy-saving technologies at the stage of building design. This allows efficient use of material and energy resources, minimize costs during the design and construction of buildings and structures. One of the energy-saving technologies widely used in construction is the use of ventilated facade systems. Its application in difficult climatic conditions of many regions of Russia requires improvement and refinement...

Lightweight concrete based on siliceous compositions of natural origin

Lubov Zakrevskaya, Andrey Gavrilenko, Sergey Avdeev, Igor Gandelsman & Andrey Kireev
The focus in the release of construction materials is determined by waste recycling, saving energy costs and environmental management by means of reducing dump areas. The production of magnesia binders from dolomite waste meets all these requirements. There was made an effort to create a new material based on magnesia binder and lightweight silicate aggregate made from tripolith of Vladimir region deposit. In the course of the work, samples were synthesized and tested for strength...

Track-etched membranes back-flushing and regeneration during the natural water purification

Polina Barashkova & Ludmila Molodkina
Membrane filtration is one of the main methods of local water treatment. Track-etched membranes allow to obtain high-quality purified water due to their high selectivity. During the filtration, the productivity of process can decreases due to the adsorption of components in the pores, pore blockages, formation of sediment layer above the membrane. To restore the productivity, the membrane should be flushed periodically or regenerated chemically. Comparative study of the back-flushing and chemical regeneration after natural...

Strength parameters of earth dams under various dynamic effects

Mirziyod Mirsaidov, Tohirjon Sultanov, Rustamkhan Abdikarimov, Alisher Ishmatov, Bakhtiyor Yuldoshev, Elyor Toshmatov & Doniyor Jurayev
The paper provides the methods for evaluating the strength parameters of earth dams under forced oscillations. The methods of solving the problem are based on the expansion of sought for solution in terms of eigenmodes of elastic structure oscillations. Linear steady-state and unsteady forced oscillations of three different earth dams were studied with account of structural heterogeneity and viscoelastic properties of structure material under various dynamic effects. To describe the viscoelastic properties, the Boltzmann-Volterra hereditary...

Strength of reinforced concrete beams of high-performance concrete and fiber reinforced concrete

Vladimir Travush, Denis Konin & Alexey Krylov
The strength of reinforced concrete beams made of high-performance concrete and fiber reinforced concrete was evaluated in a pure-bending test. The efficiency of using straight steel fiber in bending structures was evaluated. The fracture pattern of models was described. The results of measuring the vertical displacement and crack width are provided and compared to the rated values. The diagrams of stresses and deformation in reinforcement and concrete of models are presented, and their specific features...

Finite element analysis of crane secondary truss

Olga Tusnina
Finite element analysis of the crane secondary truss of top-blown oxygen vessel plant with the span of 36m is considered in the paper. Analysis of crane secondary truss is quiet difficult because of necessity of taking into account actual stiffness of its joints and also because of the fact that lower belt of truss made of thin-walled closed profile is experiencing restrained torsion because of eccentrically crane load acting. For these reasons modeling of crane...

Organizational and technological reliability of the construction process

Vadim Kabanov
Construction projects of buildings and structures, as well as plans of construction and installation works are often subjected to fair criticism from the Pro-producers of the work. Such criticism is that the calculated cost value and long lasting-STI CMP does not take into account the specificity of real contractors. To address these criticisms and proposals were developed for the assessment of such intensity values of SMR production, which most realistically take into account the actual...

Ventilated facade integrated with the HVAC system for cold climate

Mikhail Petritchenko, Darya Nemova, Evgeny Kotov, Darya Tarasova & Vitaly Sergeev
The application of convective heat transfer for air mass displacement in ventilation systems without the mechanical draft (integration of Double Skin Facade with HVAC Systems of the building) has a real practical perspective for Building energy performance. The purpose of this article is development of the theory of heat and mass transfer in capillary-porous media, air flows and building structures. The engineering purpose is а concept development of a closed ventilating circuit with convective heat...

Transformable fire barriers in buildings and structures

Marina Gravit, Oleg Nedryshkin & Olamipe Ogidan
Fire curtains are used in case of fire to create a temporary barrier in open technological openings, openings of buildings and structures. The paper presents the results of tests for fire resistance of samples of fire curtains. The ability of intumescent formulations to effectively prevent the spread of heat has been studied. The article presents the results of testing various compositions of Intumescent fire retardant coating (IFRC) with the addition of latex for fire curtains...

Finite element models in stresses for plane elasticity problems

Yury Tyukalov
The solution of the plane problems of elasticity theory on the basis of stress approximation is considered. To construct the solution, the additional energy functional is used. With the help of the principle of possible displacements, algebraic equations of equilibrium of the nodes of the grid of finite elements are constructed. Equilibrium equations are included in the functional of additional energy by means of Lagrange multipliers. The necessary relations for rectangular and triangular finite elements...

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