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  • Institute of Physics (IOP)  (21,781)
  • MDPI Publishing  (18,900)
  • PANGAEA  (9,491)
  • 2015-2019  (50,172)
  • 2018  (50,172)
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  • 2015-2019  (50,172)
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  • 1
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-12-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 2
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-01-19
    Repository Name: EPIC Alfred Wegener Institut
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  • 3
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-01-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 4
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-03-15
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 5
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-03-26
    Repository Name: EPIC Alfred Wegener Institut
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  • 6
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-05-04
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 7
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-09-14
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 8
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-01-23
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 9
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-01-22
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 10
    Publication Date: 2018-01-24
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 11
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-01-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 12
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-01-23
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 13
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-04-24
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 14
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-04-24
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 15
    Publication Date: 2018-06-05
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 16
    Publication Date: 2018-07-13
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 17
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 18
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 19
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-24
    Repository Name: EPIC Alfred Wegener Institut
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  • 20
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-04-24
    Repository Name: EPIC Alfred Wegener Institut
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  • 21
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-04-24
    Repository Name: EPIC Alfred Wegener Institut
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  • 22
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-11-28
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 23
    Publication Date: 2018-07-13
    Repository Name: EPIC Alfred Wegener Institut
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  • 24
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
    Repository Name: EPIC Alfred Wegener Institut
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  • 25
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
    Repository Name: EPIC Alfred Wegener Institut
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  • 26
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
    Repository Name: EPIC Alfred Wegener Institut
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  • 27
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
    Repository Name: EPIC Alfred Wegener Institut
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  • 28
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-02-05
    Repository Name: EPIC Alfred Wegener Institut
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  • 29
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-24
    Repository Name: EPIC Alfred Wegener Institut
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  • 30
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-07-19
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  • 31
    Publication Date: 2018-11-30
    Repository Name: EPIC Alfred Wegener Institut
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  • 32
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    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Publication Date: 2018-11-28
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  • 33
    Publication Date: 2018-12-16
    Description: The precision of the universal time UT1 forecast for the short time intervals (up to two months) is researched in this paper based on the celestial mechanical model of the Earth axial rotation irregularity. It is shown that use of the approximate low-parametric model for the problem of the Earth axial rotation velocity variation forecast on the short time intervals is justified. The approximate model is obtained by the averaging of the variable parameters that is exposed to small variations in consequence of perturbation factors nonstationarity. The method of weight coefficients distribution in approximation algorithm that takes into account the irregular oscillations of the Earth axial rotation velocity is suggested. The precision of the forecast that is identical to published by IERS one is achieved with the help of weighted least squares method.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 34
    Publication Date: 2018-12-16
    Description: A solution of the problem of modeling the compensatory system’s sustainability on the basis of the algebraic formalization of the general concept of the system is proposed. By a compensatory sustainability is meant the internal structure of the system’s links, which ensures the interchangeability of its structural resources.
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  • 35
    Publication Date: 2018-12-16
    Description: List of Photo available in this pdf.
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  • 36
    Publication Date: 2018-12-16
    Description: The article illustrates the analysis of oscillations of a flat multi-storey framework as discrete dissipative systems (DDS) at pulse influence by the time analysis method (TAM). Brief theoretical prepositions of TAM, such as description of the equation of motion of the DDS and expressions of response parameters, are given. The design dynamic model of the structure represents the flat three-storey shear frame having three degrees of freedom. The calculation results are oscillograms of internal response characteristics and reaction parameters of the system on the time slice t ϵ [0;8] sec. The multi-cycle nature of deformation of racks and also the change of parameters of plastic zones of framework supporters in the process of non-linear oscillations are considered.
    Print ISSN: 1757-8981
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  • 37
    Publication Date: 2018-12-16
    Description: When carrying out water treatment processes, a significant amount of hydroxide sediments is formed, which have a low water-yielding capacity. In the paper, the sediment of sewage treatment facilities of water pipes, which is formed in the conditions of low turbidity and medium color of water in a water source, was investigated. The effect of seasonal variations in turbidity, color and temperature of the treated water on the specific resistance of sediment filtration is shown. The features of sediment formation in sedimentation tanks of various types are considered. It is shown that the conditions for the formation of sediment affect its properties. It is established that the return of washing water, realized on one of the blocks of main water treatment facilities, increases the turbidity of the water to be purified and leads to the formation of sediments that are easier to be conditioned. At the same time, the sediment, formed in two-tier sedimentation tanks, when they are condi...
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  • 38
    Publication Date: 2018-12-16
    Description: The wealth of our country is not only people and a multinational culture, but also a vast territory on which the areas of a unique animal and plant world, depending on their geographical location, have spread. In order to preserve the natural environment on the territory of our country, since the Soviet era, protected natural areas, hunting facilities have been created, and a hunting resources fund has been established. In Russia, there are about 5,000 hunting users, who carry out hunting activities in 7,000 hunting farms, employing about 80,000 people. The territory of the hunting area may include lands of various categories of the Land Fund of the Russian Federation and lands for various special purposes, as well as limitedly defensible lands. According to the current legislation, a differentiated approach is used to regulate the use of these lands, which makes it difficult to use and manage this type of land, and accordingly the industry. The article deals with the problems, ...
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  • 39
    Publication Date: 2018-12-16
    Description: The acceleration of hardening of compositions, based on cement and low cement binding materials, is possible in special conditions of concrete mixtures consolidation when a disperse system “binding aggregate” is being consolidated by a small amount of water. These are so-called methods of vibration pressing and pressing. Vibration pressing presupposes a binary mechanical influence on the consolidated mixture – vibration and pressure, generated by a power installation of a press or a set-on weight the strength of which is widely variable. No need for mixture plastic state sustention in the conditions of such influences imposes special requirements both for the mixture composition design and modes of its consolidation and strengthening. At present, a recovery of industrial powder wastes which do not possess the binding properties, while being produced by the traditional methods of building materials manufacture with the use of easy-to-place mixtures (vibration pressing, tamping, a...
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  • 40
    Publication Date: 2018-12-16
    Description: This article deals with the particular objects of the reconstructed historical architectural sights in Tsaritsin and considers the architecture of the Soviet Neoclassicism of Stalingrad’s post-war restoration of the 1940s and the 1950s. It shows what the architects’ efforts were directed to and considers the style and compositional arrangement of buildings of the time. The study is conducted by means of the analysis of the materials found in central and regional archives, the literature review, and field observations (measuring and photographic registration). The article provides the description and analysis of the architecture of the city’s most significant buildings of the time. It analyses and classifies main specificities of architectural details and principles of their use in various types of buildings of the Soviet Neoclassicism. It also highlights the role of the architectural detail in creation of an image of the Hero City. The article also provides a new record of photo...
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  • 41
    Publication Date: 2018-12-16
    Description: The increase of energy efficiency and energy saving are the main indicators of the improvement and growth of the competitiveness of the Russian economy. One of the system approaches is saving of energy resources through heat recovery. The use of heat recovery units and assessment of the boundaries of their effective use are rather relevant for regions with a long heating period and low negative temperatures. The study proves that special climatic conditions of the Southern Urals provide certain benefits when using heat recovery units in the cold season, relative to other regions, which allows us to use them effectively in ventilation and air conditioning systems throughout the year.
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  • 42
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    Institute of Physics (IOP)
    Publication Date: 2018-12-16
    Description: All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
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  • 43
    Publication Date: 2018-12-16
    Description: The current article describes green pigments’ manufacturing and application problems. Verditer green, or green pigment, is a group or chemical compounds used in various branches of industry, especially in manufacturing paints used for decoration and restoration of engineering constructions and other buildings. The properties and methods of obtaining verditer green from industrial waste are presented with the properties of viridian and cobalt green taken as the examples of green pigments. The technology of obtaining chromium oxide III, chromium hydroxide III, cobalt green including the required equipment, is given with the focus on the calcination process, the chemical reactions are performed both in description and chemical formulae, the different methods of obtaining the pigments, depending on the demanded pigment’s colour, are offered, and the technical and chemical requirements for the raw material and the pigments’ compound are listed.
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  • 44
    Publication Date: 2018-12-16
    Description: The industry that forms sulphide-bearing wastewater imposes a big man-made burden on the ambient environment. Existing treatment methods of sulphide-bearing wastewater intend for insignificant decrease of sulphide concentration, water purification without further use, and storing of sediments at polygons. Transportation of sulphide-bearing wastewater causes heavy corrosion of pipe system. The developed modern technology allows carrying out quality purification of wastewater, obtaining circulating water for process purposes as well as commodity products used in the main technology. The relevant is development of optimal techniques for sanitation of sulphide-bearing wastewater from the position of using the pollutant as a finished reagent solution. Research on the processes of forming sulphide-bearing wastewater was carried out, selection of purification method by treatment using ferrous sulphate was conducted, conditions for efficient use of this method with the purpose to develo...
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  • 45
    Publication Date: 2018-12-16
    Description: A significant increase in the construction of high-rise buildings in Russia is observed in the last decades. Ekaterinburg takes the second place in Russia after Moscow as regards the annual construction volumes. The first high-rise buildings in the Urals region were built as early as in 19th century and the height of these buildings reached approximately 75 meters. Nowadays, two northernmost skyscrapers in the world are located in Ekaterinburg, one of which is a part of a business district "Ekaterinburg-City". The height of these skyscrapers is above 150 meters. The incompleteness of the Russian regulatory basis for designing high-rise buildings makes it necessary to carry out a large amount of additional design and construction processes. Therefore, despite the experience of previous projects, designers have to create individual innovative design solutions for every new high-rise building. This article describes the features of design of the high-rise building is the Iset Tower...
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  • 46
    Publication Date: 2018-12-16
    Description: Here mechanical systems with the Nambu bracket is discussed. We consider some examples of the Nambu mechanics. The main idea that the superintegrability of mechanical system leads to the Nambu bracket. Some applications for the field theory are given.
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    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 47
    Publication Date: 2018-12-16
    Description: The system of automated computation of the insolation duration is considered as applied to the tasks of architectural design. The model and algorithm of computation and plotting are given. The system allows to perform computation in a point, inside a contour, plotted on a territory or a building’s wall. By way of illustration, shadow movement animation is performed, as well as building of the sectors of light indicating at the reasons of limited insolation. The influence of the computation date on the insolation duration is considered. It is demonstrated that changing the date of the normative computation from March 22 to April 22 reduces the region of unacceptable insolation by 50...70%. The examples of computation are given. The system interface is considered. A brief description of the system’s software implementation is provided. The models are designed in the AutoCAD package. The programs are written in the AutoLisp programming language.
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  • 48
    Publication Date: 2018-12-16
    Description: The urbanization of territories, changes in the lifestyle of the population, significant deterioration of the environment require a change in the traditional approach of the formation of urban and architectural space. In view of the limited time budget of the modern city dweller, it is necessary to revise the existing system of active green recreation, bringing it as close as possible to the space for life and work. Because of the limitations of territorial resources and aggressiveness of the external environment, the trend of green space "green building". This concept involves the active formation of several types of landscaping at the same time. That requires a special approach to the design of the "green" object. The article deals with the levels of the complex of factors that are necessary in the design of ecological space at various stages.
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    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 49
    Publication Date: 2018-12-16
    Description: The article offers an approach to building collapse risk evaluation with damage localization. As a rule, the risk includes the probability and value of loss. The probability of failure for separate construction is determined by known methods, but for risk-management decisions these methods are too complicated. The solutions of the problem, using the specified theoretical base, are considered: for structural damages of the constructions the simple rules of criticality degree determination are used; they are based on fuzzy logic, which ensures the efficiency of structural state assessment. The represented risk assessment method is also based on technological and social loss cost evaluation for various areas under failed constructions and different accident scenarios. The risk oriented approach can be applied in few related areas of construction, from design to insurance.
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  • 50
    Publication Date: 2018-12-16
    Description: The territorial technosphere is a dynamic system described by a system of differential equations. The initial data of these equations take into account the conditions of normal functioning of the territorial technosphere and emergency situations. Changing the parameters of the impact of the technosphere allows you to influence the quality of the environment and to maintain it in a stable state. An effective mechanism for controlling the territorial technosphere as a dynamic system should be the elimination of inoperable States using: the formation of a set of informative parameters; control and registration of values of informative parameters; creation of a database of normative and actual values of informative parameters, formation of control actions.
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  • 51
    Publication Date: 2018-12-16
    Description: The chemical control department of the Kuibyshev refinery (known as KNPZ) registers a systematic increase in river water hardness and alkalinity. The increase of these values changes the reagent softening mode of clearing agents with weighted sediments. It is required to carry out a constant analysis of water alkalinity before reagent softening. The researchers collected data of average monthly values of the Volga-river water samples from Samara Hydroelectric Station, the Samara-river water samples from the Bezymyanka heat power-station, the Volga-river water samples from Kuibyshev refinery as well as hourly water samples from the same stations and compared it with the data on average daily Volga-river water discharge from Zhiguly hydroelectric power station, obtained in 2016, from July till October. The analysis of the data showed that changes of the Volga-river water discharge had no effect on the increase of water alkalinity and hardness of the KNPZ river intake.
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  • 52
    Publication Date: 2018-12-16
    Description: A new concept smart robots for massage with plane and spatial parallel mechanisms is shown. Plane and spatial parallel robots (PPR and SPR) are based on triangular and octahedral structures. Every one of sides of triangle and ribs of octahedron is linear drive. Ends of the adjacent linear drive are connected with by cylindrical (for triangle) and spherical (for octahedron) joints. As result PPR and SPR have three and twelve degrees of freedom, and they can adapt to body of patient and. Possibility of full automation some kinds massage by autonomous portable smart PPR and SPR is shown. The use of these robots will allow the masseur remotely via the Internet to serve several patients at the same time in real time. PPR and SPR are portable multifunctional smart robots for various rehabilitation applications. Both kinds parallel robots will be discussed in detail.
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  • 53
    Publication Date: 2018-12-16
    Description: The issues of protection and improvement of the environment surrounding residents of the cities are one of key in modern town planning. Their decision has to be a component of design and planning work. Throughout all evolution of the architectural and landscape environment of the city as anthropogenic ecosystem the quality of his territories in many respects defined gardening, which minimizes negative impact of factors of the urbanized environment on the person But in the modern cities its area decreases, the condition of vegetation worsens that, finally, leads to violation of spatial interrelations of an anthropogenic and natural component of the urban environment. The territorial growth of the cities has aggravated a problem of preservation of a natural landscape. The total area of public green areas in the majority of city districts does not meet the operating town-planning standards Owing to this fact in the Russian town planning to the forefront there were questions of form...
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  • 54
    Publication Date: 2018-12-16
    Description: The paper presents the results of experimental studies on the effect of silica-containing components on the structure and properties of cellular concrete. It is shown that the creation of the optimal pore structure of concrete and the structure of the interporous frame, the intensification of hydration and crystallization processes in hydrothermal treatment can improve the physical and mechanical characteristics of cellular concrete. At the level of modern knowledge about the structure and properties of cellular concrete, the potential for increasing its strength characteristics has been studied. Through the effective use of the energy potentials of the multicomponent binder, including Portland cement, calcium lime and activated silica components, the nanopore structure of the matrix stone is formed.
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  • 55
    Publication Date: 2018-12-16
    Description: Contemporary models of solids of thermoelasticity requires to include multiphysics coupling and employ non classical e.g. elastic behavior. The permanent generalization of elastic model is the Cosseratt micropolar model. Now this model is to be applied to growing solids, biomaterials, granular media, concrete. The basic concepts of the continuum mechanics is considered in connection with the difference in the dimensions of the continuum and external space. New field variables are introduced representing complex continuum properties. A generalization of the model of the micropolar continuum has been proposed. The action and the action density for the complex continuum model are discussed. A new field-theoretic model of a nonlinearly elastic continuum is developed assuming existence of an isometric immersing into an external plane space.
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  • 56
    Publication Date: 2018-12-16
    Description: In the modern society a constant search is performed for the options to improve the energy efficiency of constructed residential and public buildings to reduce the cost of their operation and the human impact on the environment. One of the possible ways of the problem solution is using new construction and thermal insulation materials and products that meet modern requirements, for example, fencing and supporting construction made of polystyrene concrete. The authors carried out some research works, concerning the aforementioned improvement of deformation and strength characteristics of building material, by modeling its structure in the Institute of New Materials and Technologies of Ural Federal University. The research and mathematical modeling of the dependence of the composite material characteristics on the properties of raw materials and structure will allow predicting the strength of manufactured structures and determining the ratio and quality of raw materials of polysty...
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  • 57
    Publication Date: 2018-12-16
    Description: To purify aquatic environments from various toxicants, we obtained a carbon-mineral sorbent from the reed stems of the South (Phragmitesaustralis) by carbonization. At the stage of carbonization of the crushed reed, a carcass, containing carbon and silicate constituents, is formed. Depending on the type of feedstock and the carbonization temperature of the organic component, the content of the silicate component varies in the range of 20-30%. The process is carried out until a sorbent containing 70-80% of the carbon component, 29-19% of the silicate component and 1% of water is obtained. The adsorption capacity of the obtained carbon-mineral sorbent towards to medium and macromolecular organic compounds, and heavy metals was studied. As a result, it was established that the carbon-mineral sorbent obtained from the reed stems of the South (Phragmitesaustralis) has moderately distributed sizes of macro- and micropores. The presence of two constituents, carbon and silicate, in the ...
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  • 58
    Publication Date: 2018-12-16
    Description: One of the new and promising directions in the wastewater treatment technologies and treatment of precipitation is the use of the probiotic agents. A lot of brands of probiotics, which differ in their composition, concentration and cost are offered by the producers on the market. The research results of the “Pip Plus Water” probiotic influence on the concentration of organic contaminants in the model wastewater solution are presented in this article. An additional point is that the changes in the quality indices of the wastewater, which is taken from municipal sewage treatment facilities, because of the contact with a probiotic have been investigated. The characteristics, describing the active sludge compaction process before and after the addition of the probiotic agent, have been obtained. The preliminary study stage has showed that the probiotic agent being considered has a positive impact on the certain sewage quality indicators and the precipitation properties. The ability ...
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  • 59
    Publication Date: 2018-12-16
    Description: The article presents the results of the study of the landscape-botanical complexes in the zone of influence of the Orenburg gas condensate field. The studies have found that the area objects in most cases are located on the territory of arable land, which occupy 60-90% of the terrain of the study area. Previously, natural vegetation was cut down and new trees and shrubs were planted. The studies have shown that during the reconstruction and construction works at industrial sites the soil was removed. During the work with the water wash the existing vegetation was subjected to species transformations, which led to the death of communities that can not withstand constant excessive moisture. Thus, the role of the floodplain as a natural filter under the condition of surface water pollution was violated. Water-washing works led to a change of the Ural river bed: the right bank became more steep, the river bed expanded, which affected the decrease in the flow rate, the process of sil...
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  • 60
    Publication Date: 2018-12-16
    Description: The article presents the results of the study of the vegetation cover, in particular, the floristic and phytocenotic features of the territory of oil and gas extraction of the North-Eastern coast of the Caspian Sea, the southeast of the Caspian lowland are determined. Also, modern ecological and technological methods and a monitoring program are reflected, which will allow us to identify and assess the level of man-made impact, to develop a system of compensation processes that balances the ecological system as a whole. It is shown that the production activity of the oil and gas industry remains one of the main reasons for the negative impact on the stability of the vegetation cover of the studied areas.
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  • 61
    Publication Date: 2018-12-16
    Description: The article discusses features of dynamic characteristics in a parallel-staging launch vehicle’s elastic design. In contrast to traditional forms of body transverse vibrations in rockets with tandem staging, the parallel-staging scheme features vibrational forms of spatial character which are associated with longitudinal and torsional vibrations of side blocks of the rocket. The attention in the paper is drawn to the simplicity and clarity of drawing up general equations of dynamics in the form of d’Alambert-Kane, as well as to the features of projections of overload forces and the main engines thrust onto the related and inertial axes.
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  • 62
    Publication Date: 2018-12-16
    Description: The article gives a short review of modern trends in the development of architectural space and essential factors that influence this process: material and technical; and socio-cultural. The introduction touches upon modern requirements for organizing the living environment. The body of the article defines and analyses the factors determining the development of the modern architectural space. They represent two different trends of influence: material and technical; and socio-cultural. The body starts with the description of material and technical factors that include development and improvement of material and technical resources, technological progress, changes in the engineering and technical requirements. The author pays particular attention to their impact on modern construction concept and space planning. The article further on investigates socio-cultural factors that are regarded as the underlying for the process of shaping a modern architectural space. Among socio-cultura...
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  • 63
    Publication Date: 2018-12-16
    Description: An analogue of confidence intervals with a given level of possibility for output variable in a fuzzy linear regression model has been developed in the paper. The methods of fuzzy regression analysis extend the methods of classical regression analysis and allow to solve different problems in conditions of fuzzy and incomplete initial information without the limits of the probabilities methods. The developed approach opens up new opportunities for predicting of output fuzzy variable.
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  • 64
    Publication Date: 2018-12-16
    Description: The article deals with the problem of architectural and city planning attractiveness of large cities due to the growing population and increased traffic. The author focuses on the negative impact of constructing multi-level highway intersections in the city structure in the light of socio-ecological, emotional-psychological, artistic-aesthetic and cultural-religious aspects. The article solves the problems of urban areas by integrating multi-level traffic intersections. The construction of low-rise settlements in the zones with much gardening, forest areas near lakes and rivers compensates city unattractiveness. Apparently, the solution of the problem is the harmonious combination of public administrative zones of "point" construction with buildings of different types in combination with low-rise buildings of a country type. The effective combination is based on developing a good transport system, based on multi-level traffic intersections. We suggest combining these zones with ...
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  • 65
    Publication Date: 2018-12-16
    Description: The paper presents a historical perspective on the emergence and development of Russian monotowns. It also studies the lack of a case-by-case approach to the modern Russian monotowns architectural appearance formation of as well as contemporary creative approaches to the design process of architectural works and design. This paper makes the case for creative approaches to the creation modern objects in the monotown's architectural space. It provides an example of a creative approach to the architectural object design, at the initial designing stage enabling to individualize a future project, reflecting a part of the author's creative self-identity. A “self-concept" is given as an example of a design approach. That approach ensured the use of a graph unit - a prototype-based visual component formation of the organization corporate identity, reflected both in the building architecture, small architectural objects, and in design items. The visualization, accompanying the paper, is ...
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  • 66
    Publication Date: 2018-12-16
    Description: The International Conference on Construction, Architecture and Technosphere Safety (ICCATS-2018) was organized by South Ural State University (national research university), Chelyabinsk, Irkutsk National Research Technical University, Irkutsk and Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg on 26-28 of September, 2018. The conference program encompassed a wide range of topics and was divided into 9 sections: building materials and products; construction, buildings and structures; construction technology and organization; engineering networks and equipment. foundations, bases and underground structures; engineering and computer graphics in construction design; architecture, urban studies and design; analysis, assessment and technologies of natural and man-made disasters reduction; industrial ecology and waste-water treatment. More than 236 participants from 28 cities of the Russia and other countries attended the confe...
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  • 67
    Publication Date: 2018-12-16
    Description: The concept of safety and life support of the population in the context of urbanization is one of the most systemically important concepts of human ecology. Legislative and regulatory documents, concerning the radiation safety of the population and personnel, have been considered. Conceptual issues have been critically analyzed. The article deals with the problems of ensuring the radiation and environmental safety in the construction industry. The problem of radiation hygiene support of technological processes and construction is of particular importance. The radiation control of working conditions needs to be carried out in accordance with the legislative and regulatory acts accepted in Russia. The issues of the relevance of radiation risks have been considered in the context of working conditions in the construction industry that were specially assessed. The activities to reduce workers’ exposure from natural radionuclides should be carried out in all cases, when this dose exc...
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  • 68
    Publication Date: 2018-12-16
    Description: The article reveals the study of spatial distribution of the density of public and business objects with the use of geoinformation technologies. The source of the data was data from the open geoinformation project OpenStreetMap. Earlier, we showed that for the radial component of the density of public and business facilities. This paper is a continuation of the previous one. The angular distribution of density of public and business objects is studied by example of the largest city - Ekaterinburg. Spatial density has "tails" that characterize the predominant directions of the city development. At the same time, the average spatial configuration for the average density distribution shows the radial-ring structure for urban planning. The obtained results are interpreted within the framework of the "frame-fabric".
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  • 69
    Publication Date: 2018-12-16
    Description: It is important to check the projects created on the basis of BIM. In this case, an automated process of checking and evaluating the quality of the BIM-model is necessary, for example, for express checking in the state expertise. At the same time, it is necessary to take into account the technological and organizational features of construction and installation works. This issue is especially important and relevant for facilities that are dangerous and technologically complex (for instance, stadiums, high-rise buildings, hydroelectric power stations, bridges). In the article the authors propose to approach the examination of the state expertise of the projects of these objects from the position of the model of object technological dependencies. The key factor of this model is a description of the technology of the facility construction, which displays the technological interrelation of the works, their quantification and the definition of the time domain of these works. The mode...
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  • 70
    Publication Date: 2018-12-16
    Description: The article provides an overview of the dependencies connecting structure of concrete with young’s modulus. The developed method experimental evaluation of the known dependencies. In the studies used samples with different number and different size of crushed stone. Shows the compositions of the used concretes. According to the results of the tests were obtained the theoretical diagrams of the concrete. The paper presents the results of experimental studies of various compositions of concrete. Part of the dependency of the young’s modulus was checked for consistency with experimental data. Proposed practical methodology for the evaluation of the concrete structure. According to the results of the comparison proposed a theoretical model for the estimation of the young’s modulus for concrete structures.
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  • 71
    Publication Date: 2018-12-16
    Description: The current state, development and transformation of transport infrastructure in urban areas are due to factors such as increased safety, environmental requirements, as well as the provision of new opportunities through the connection of vehicles to the Internet. Connected, Autonomous and electric vehicles have become key areas of development in the automotive industry. By the end of 2020, there will be more than 14 million connected vehicles on the roads of Russia, 3.5 million of which are trucks and more than 10 million personal cars. In this paper, the object of the study is the transport interchange of regional importance as a structural component of a single urban space of the city district of Tyumen, Tyumen region. The authors present the results of theoretical research and practical work on the implementation of geospatial systems and technologies in the design of roads. The features of the design of this object using GIS technologies are considered. The analysis of the d...
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  • 72
    Publication Date: 2018-12-16
    Description: Relative statistical indicators of injuries in construction are higher than the general rate for all types of economic activity. In this paper, the assessment has been made of the occupational risks during buildings construction with consideration to the peculiarities of technological stages. The occupational risks were assessed with regard to the probability of danger and seriousness of consequences. The highest risks were revealed for the following works: land plot fencing, demolition of the existing buildings, foundation excavation, trenching for communications, erecting outer walls of buildings, and wiring. The most frequently occurring accidents are falling from height and electric injuries. Namely these risks require putting more focus on them and using individual approach when trying to minimize them.
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  • 73
    Publication Date: 2018-12-16
    Description: The article deals with the problem of protecting the population and the environment from the negative impact of an agricultural enterprise built on the territory of a settlement prior to the enactment of land and urban codes. The enterprise under consideration refers to hazardous production facilities of the third hazard class. In accordance with the urban development plan for the city of Zavodoukovsk, the enterprise was in the residential development zone. Taking into account that, since the establishment of the company, not only the production capacities but also the area allocated for the land plot have increased, there is an urgent need to resolve the issues of its future activities on the territory of the settlement in accordance with the current legislation.
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  • 74
    Publication Date: 2018-12-16
    Description: The application of the theory of fractal geometry in construction materials production allows revealing a new possibility to model the properties of materials and processes. The fractal theory can be used in the research of the processes of cement paste hardening as the formation of a cluster structure; the structure and properties of dispersed media; structural characteristics of the porous material; cracking caused by various factors, using data received at predicting the collapse of critical structures. The investigation of surface properties of aggregate, using a fractal approach, allowed one to reveal the direct dependence between the physical and mechanical characteristics of the concrete and the value of the fractal dimension of such aggregate. Thus, application of the method based on the determination of the fractal dimension of the aggregate, allows predicting the properties of concrete as well as to regulate its physical and mechanical properties by selecting or modify...
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  • 75
    Publication Date: 2018-12-16
    Description: The identification of modern approaches and the specifics of the improvement of architectural solutions for residential buildings of an affordable price category in non-capital cities of the Russian Federation has become the main task of the research. From the generalization and analysis of the overall results of the development of the housing sector in the Russian Federation, the authors proceed to the consideration of the situation in one of the megacities of the country - Samara. With the example of seven residential compounds being built or newly built in this city, the approaches to the formation of architectural solutions that are characteristic of local conditions at the present stage of housing construction have been shown. A particular attention was paid to the social infrastructure and the functional and spatial organization of residential complexes, environmental and social aspects. The conclusion about the gradual increase of consumer properties of affordable housing...
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  • 76
    Publication Date: 2018-12-16
    Description: Colorless building glass on the basis of non-standard raw materials with the use of discolourers-cerium oxide and potassium nitrate-was synthesized. The regularities of the cerium oxide addition effect on the light transmittance of the glasses are shown when the proportion of Na 2 O is replaced by K 2 O. The results of ORP and iron oxide equilibrium investigation in glasses, improvement of light transmission by means of correction of ORP glass are presented. The physical and chemical properties of glasses are measured: thermal coefficient of linear expansion (TCLE), water resistance and crystallization ability of glasses. The recommended composition of a building glass on the basis of non-standard raw materials is presented.
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  • 77
    Publication Date: 2018-12-16
    Description: An algorithm of searching for the efficient values of the parameters of pre-stressed steel arch trusses with high-strength ties is currently being developed. The task in focus is to reduce the cost of the operating trusses while taking into consideration the strength, rigidness, and stability limitations as per regulatory requirements. It is assumed that a truss shall be fastened to be displaced from its plane by the nodes, and its bars shall generally be subjected to stretching-compression and in-plane bending. The cross-section areas of bars and ties along with the pretension force vary within discrete sets of allowable values. The optimization is performed via a genetic algorithm. The strain-stress state of the structure variants is calculated basing upon the finite element method. The feasibility of the suggested method was illustrated for optimal engineering of a steel truss with a 60 m span, pre-stressed with a double-lay rope.
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  • 78
    Publication Date: 2018-12-16
    Description: Shengsi County is located in Zhoushan City of Zhejiang Province at the junction of the Yangtze River estuary and Hangzhou Bay, which is known as an island county or the Shengsi Islands. The east side of the islands is surrounded by the sea, the south and west sides are facing Mount Putuo - a Buddhist resort - and Jinshanwei in Shanghai, and the north side of the islands are connected to the Yellow Sea. The islands, known as the only way of international access to the Yangtze River and Wusong from the ocean. The Shengsi Islands are made up of 404 islands, 16 of which are inhabited. The total area of the islands is 8,824 square kilometers. The Shengsi Islands, also known as a fairy mountain, are the only state-level scenic spot in China. There are reefs, rocks, nice beaches and precipitous cliffs distributed on the islands. The paper considers tourism resources of the Shengsi Islands, the elements of natural climate resources, tourist landscapes and reveals the present situation o...
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  • 79
    Publication Date: 2018-12-16
    Description: When in operation, a significant part of metal structures is exposed to aggressive media, causing the damage and failure of construction sites. This paper reviewed the well-known mathematical models and calculation methods of multielement metal structures, exposed to corrosive wear. Also, this paper described the solution approaches of stress-strain state and a life time evaluation of multielement rod structures. The finite element method is used for the solution of stress-strain state evaluation; the advantages of this method are also described. This paper proposes the statements of problems and solution algorithms of life time calculation of multielement rod structures, such as statically indeterminate trusses operating in the aggressive medium. This paper considered the most common corrosion wear case, where the corrosion rate is a stress function. The proposed solution methods involve the use of mathematical models and analytical formulas.
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  • 80
    Publication Date: 2018-12-16
    Description: The article considers the issues of a safe approach to the formation of comfortable light and colour environment of a modern megacity The factors influencing the perception of light and colour environment by drivers and pedestrians in the dark are determined. The state of the regulatory framework on this issue is analyzed. The ways of dark time lighting for window displays at Chelyabinsk intersections are studied, taking into account the historically formed light and colour context of the Ural region in the interrelation of objects and the existing lighting system. The contextual peculiarities of the perception of window display light and colour design in the era of “information society” were revealed.
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  • 81
    Publication Date: 2018-12-16
    Description: The paper presents the results of studies on the replacement of a cement binder in a concrete mixture with fine blast-furnace granulated ground slag. This material has found its application in construction as an active mineral additive, improving the structure of concrete, and it also allows reducing the cost of concrete production. The results of the matching composition of concrete class B25 with a cement binder, as well as with the use of ground slag, are demonstrated. The information on the physico-mechanical characteristics recorded during the preparation of the concrete mix is also given. As a result of the control samples testing, it was revealed that the replacement of cement with slag in the range of up to 30 percent allows achieving the required parameters of compressive strength. This circumstance makes it possible to speak about the possibility of using blast-furnace granulated ground slag for building structures both in factory production and in the production of mo...
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  • 82
    Publication Date: 2018-12-16
    Description: Wooden architecture is a significant part of the Russian culture and largely determines its national identity. Wood as a construction material has not exhausted its historical role yet. The reliability of wooden structures can be considered taking into account new processing possibilities. Wooden structures remain important in the face of growing environmental problems, resource-saving. As a renewable building material wood has great prospects. As the decrease in the thermal protection properties of wooden enclosing structures leads not only to heat losses and to the creation of an uncomfortable temperature and humidity regime of residential premises, but also to the decrease in the durability of buildings, increasing the thermal protection properties of enclosing structures in residential buildings should be considered a task of a not only technical, but also social nature. As a result of the analysis, the author of the article suggests using a wooden module for low-rise buildi...
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  • 83
    Publication Date: 2018-12-16
    Description: The article analyzes the influence of material composition of modified gypsum-alumina expanding cement with regard to mineral components ratio on its mechanical-and-physical properties change due to water saturation at the stage of delayed hardening. The expandable cementing medium applied in the survey, except for traditional components such as crushed gypsum rock and alumina cement, contained additionally portland cement and superplasticizer, based on polycarboxylic ethers. It has been established that depending on mineral components ratio water saturation of one-year-old cement rock can either improve or worsen its strength properties, provided that bending and compression resistance can change asynchronously and divergently. A regularity has been revealed regarding composite water resistance change depending on mass ratio of portland cement and gypsum rock (AC/GR). Within the variability of experimental factors a judicious ratio - AC/GR=0,2-0,95 has been established, where b...
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  • 84
    Publication Date: 2018-12-16
    Description: The present study is devoted to analysis of coupled harmonic waves of translational displacements and microrotations propagating along the axis of a long cylindrical waveguide with circular cross-section. Microrotation waves modelling is realized within the frameworks of linear micropolar elasticity by introducing microrotations as independent degrees of freedom of the elastic continuum. The coupled system of vector differential equations of the micropolar elasticity is given. The translational displacements and microrotations vectors in the coupled wave are decomposed into potential and vortex parts. The coupled differential equations are uncoupled for some distinguished cases. The Helmholtz equations solutions for the translational and microrotation waves are obtained for a high-frequency waves in a cylindrical domain.
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  • 85
    Publication Date: 2018-12-16
    Description: The methods of convective heating of thin-walled monolithic structures constructed in winter conditions in tunnel formwork are considered. The classification of convection heating methods, based on the principle of heat flow to the heated structure, is made: traditional chamber heating, chamber heating with air ducts, convection heating with pre-form curtains, developed at the Department of Construction and the theory of structures of the South Ural State University. The efficiency of capital investments for the methods under consideration is determined on the basis of the determination of the area under the investment curve. The unit costs in rubles per cubic meter of heated concrete for the considered methods are calculated. The results on capital investments and specific costs for heat treatment of concrete by convective methods are compared. The authors draw the conclusions about the effectiveness of using the method of convection heating with pre-form curtains for heat trea...
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  • 86
    Publication Date: 2018-12-16
    Description: The results of a computational experiment on unloading a dump truck are described. The experiment was carried out on the mathematical model of a car built on the basis of Lagrange’s equations. Before the movement (unloading) of cargo, the lifting of the platform is considered as a quasi-static process. From the equations of the equilibrium of the car and geometric relationships, analytical expressions are derived for calculating the force interaction between the platform and the frame. When the cargo moves as a monolithic block, the mathematical model is represented in the form of a system of differential equations. After the adoption of a number of assumptions, its solution was substantially simplified. An algorithm for solving the problem is proposed that implements the method of incremental change of parameters. The results of calculation of forces in hydraulic cylinders during unloading of BelAZ mining dump truck are given.
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  • 87
    Publication Date: 2018-12-16
    Description: In the article the authors consider an important role of development of creative abilities of design students on the objects of a graphic cycle, design activity during training. The importance of the disciplines "Drawing", "Bases and language of visual culture", "Architectural and Design", "Prototyping" in training preparation where students get acquainted with the bases of the graphic diploma (terms, concepts, laws) comes to light, study the main methods of design activity, master stages of creative activity, acquire professional skills. These objects provide communication with design disciplines that contributes to the development of professional competences of the profile disciplines studied in the course of education and also when performing independent works.
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  • 88
    Publication Date: 2018-12-16
    Description: This article considers the way to improve the quality of slime obtained from rolling based on the example of the slimes of the hot rolling mill 2500, Sheet Rolling Shop of the Open Joint-Stock Company “Magnitogorsk Iron and Steel Works” (MMK, OJSC). Hot rolling mill slimes can be used as secondary raw materials for metallurgical (blast-furnace and open- hearth steelmaking) and related manufacturing processes. At elevated slime humidity and high oil concentration its processing becomes rather difficult. Due to the improper slime quality, it is seldom applied for further production and is just accumulated in piles. Such piles pose a serious environmental threat polluting the atmosphere, groundwater, and soil. To resolve this problem, the authors studied the influence of slime sewage reactant treatment on slime quality.
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  • 89
    Publication Date: 2018-12-16
    Description: In this paper a problem of constraint stabilization of a two-wheeled sleigh is considered. This problem is solved with the help of the Chaplygin’s approach, in which Lagrange equations of the second kind are modified with respect to the nonholonomic constraints. For the obtained equations we define the functions of reactions forces of constraints with respect to their stabilization. During the numerical integration some of the stabilization parameters are defining at each step of the summation. This gives an advantage in comparison with the classical stabilization approach.
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  • 90
    Publication Date: 2018-12-16
    Description: Quadratic transformations are a perspective way of form-making in architectural and engineering-construction design. A quadratic (nonlinear) transformation is based on the establishment of one-to-one correspondence between the algebraic n- and 2nd-order curves. In particular, lines correspond to the second-order curves, which are widely used in the design of gridwork building structures and utility lines. Quadratic transformations are used to model the profile of rotor blades of environmentally friendly wind farms. We developed algorithms for building corresponding points for the practical application of nonlinear transformations in the computer simulation of building structures. We have shown that the inversion relative to the circle is a central quadratic transformation with imaginary fundamental point, coinciding with the cyclic points of the plane. We considered an example of using the inversion for building the rotor blade profile of a wind power installation and a cam prof...
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  • 91
    Publication Date: 2018-12-16
    Description: The paper presented the specifics of calculating the characteristics of vortex propagation and decay processes which cause aerodynamic tail fin-buffet loads in an aircraft at incompressible subsonic flow. Analysis of numerical diffusion and stability of differencing schemes implemented in OpenFOAM software package has been carried out. Based on the obtained results, differencing schemes are selected and their modification has been done. An algorithm has been presented for combining various approaches for modelling turbulent flows (RANS-LES) by means of zonal isolation and its implementation in OpenFOAM package is carried out. A series of calculations of three-dimensional flow around an aircraft at angles of attack of 0 to 30 degree considering airbrake deflections on 60 degree are conducted. Flow separation at the airbrake side edges and upper edge result in a highly turbulent wake. The corresponding region of vortex flow affects the fin and causes buffet loads.
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  • 92
    Publication Date: 2018-12-16
    Description: Description unavailable
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  • 93
    Publication Date: 2018-12-16
    Description: The plane problem of motion control of a free-floating space robot is investigated. The robot is supposed to be in a state of passive flight. It is assumed that the vectors of momentum and kinetic moment of the robot equal to zero. The movement of the arm relative to the robot body changes the position of the center of masses of the body and leads to its rotation around the center of masses. There are constraints on the range of variation of the manipulator length and the angle of its rotation relative to the body. It is shown that while carrying out special movements of the manipulator, it is possible to ensure the movement of robot gripper from arbitrary initial to an arbitrary final position, if they are located inside the workspace, which is a ring with a centre in the centre of masses of the robot. Moreover, it is possible to get the desired value of the angle between the manipulator and the body in the final position.
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  • 94
    Publication Date: 2018-12-16
    Description: To clean and restore areas with man-made pollution, bioremediation methods are increasingly used. These methods are based on the use of the biochemical potential of microorganisms and are safe for the environment. The article is devoted to the investigation of the effectiveness of the use of a microbial preparation for the remediation of soils contaminated with benzo(a)pyrene. We experimented to test the ability of «Baikal EM1», a microbiological compound, to destroy benzo(a)pyrene in contaminated soils. The compound was found to be efficient at 96.7% in «dangerously» contaminated soils (up to 5 MAC), while less efficient at higher contaminations (38.7 to 52.6% at 15 to 19 MAC). When diluted 1 to 100, the compound was more efficient than in case of dilution 1 to 50. Studies have shown «Baikal EM1» a promising biological compound for further research into the remediation and restoration of polycyclic aromatic hydrocarbon-polluted soils.
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  • 95
    Publication Date: 2018-12-16
    Description: In various industries, primarily, the production of building materials, technological processes include multiple transfer operations, during which a large amount of dust is released. The resulting dust causes air pollution and various diseases of workers. To prevent this, different dust removing systems are used. One of them is the aspiration system, which includes air purification devices. For the operation of these systems, it is necessary to obtain the data on the disperse composition of dust and its concentration. Since aspiration systems consume a lot of energy, various improvements are used. Here, basing upon the processed experimental data, the authors proposed a method to determine the main parameters of the dust flow, formed in the bulk materials transfer units of energy-efficient aspiration systems.
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  • 96
    Publication Date: 2018-12-16
    Description: In the article we considered the technological modes of obtaining heat-insulating materials on the basis of flax boon. The technology of gas-concrete blocks on the basis of flax boon production is given. The data on the structure and properties of organic aggregate (flax boon) are presented.
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  • 97
    Publication Date: 2018-12-16
    Description: The article considers the impact of short-term compression at an early age on the flexural strength of aluminate cement. Taking into account the results of the previous research, the authors took the samples with the identical planes instead of prisms. The change in splitting tensile strength of pre-stressed samples at different planes has been analyzed. The studies have shown cement hardening in a plane perpendicular to the direction of short-time compression. It can be explained by the compaction of cement stone, decrease in porosity and formation of additional bonds through the chemical-plastic hardening, as noted by F. J. Ulm and O. Coussy. The research revealed that, after the removal of load, the difference between the strength of pre-stressed and control samples tends to reduce. The X-ray phase analysis demonstrates the difference in the hydration process in the first 24 hours after loading and change in the recrystallization of hexagonal hydroalumates into cubic crystals...
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  • 98
    Publication Date: 2018-12-16
    Description: The increase of stackable waste products quantity demands taking measures is directed towards its decrease. This waste products usage in cement production which is one of the most consumptive branches of production, based on material and expenditure of energy, is one of the possible decisions. The usage of recycled resources in special sorts of cement production in contrast with its application in the Portland cement production is poorly understood and requires the increase of scientific knowledge with the purpose of total control over a technological process. The appropriate roasting conditions and whole technology ensuring is possible by careful updating and control of raw mixes. There is a potential that the most components are added the most qualitative final product will be in condition of necessary control. Two calculated modules (ferrite and sulfate) are usually used in the production, which guarantees an optimal technology of relatively clean raw materials production. Th...
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  • 99
    Publication Date: 2018-12-16
    Description: The influence of the activation of the building gypsum in the vortex layer apparatus on the specific surface, the setting time, the heat release, the change in the mineralogical composition, and the strength of the gypsum stone are presented in the article. The measurements were carried out by standard methods. It has been found that the processing of the gypsum binding material in the fluidized bed results in its mechanical activation, which (assuming the optimum processing conditions), in its turn, results in a 200 percent increase in the gypsum’s specific surface area, as well as in a 47 percent increase in heat emission during hydration. Assuming the optimum ABS-processing conditions, there is a 44 percent increase in compression strength, and a 50 percent increase in the flexural strength. It takes 2-10 minutes less for the gypsum paste setting.
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  • 100
    Publication Date: 2018-12-16
    Description: The qualitative indicators of natural waters of the open source of drinking water supply have been studied. The discrepancy with the regulatory requirements for such indicators as color and oxidability has been established. With the aim of reducing the color and oxidation of natural water, oxidative-sorption methods have been investigated. Based on the water quality indicators of the source, a non-reagent scheme of water treatment has been preliminarily proposed, including the filtration on sorption loads with preliminary chlorination of water with a dose within the limits of chlorine absorption. Such materials as quartz sand, granulated activated carbon of the brand "PUROLAT-ACTIVE", anthracite of the brand "PUROLAT-standard" and garnet have been investigated as possible loads for filtering plants. It has been established that effective reduction of water color in all considered periods of the year is achieved on a combined loading of "quartz sand - activated carbon". However, ...
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