bluuebunny/crossref_metadata_2025 huggingface dataset:
Management of apartment buildings: legal status of managing subjects
Authors: Krasnoyarova Elena
Published: November 2019

The issues of the legal status of the general meeting, managers and members of collegial executive bodies of organizations, legitimacy of their decisions are relevant for managing apartment buildings in the housing and utilities sector. The need for studies on this issue is caused by the lack of legal norms and specific mechanisms for regulating these relations, as well as by numerous court disputes, [1] and guidelines of the Supreme Court [2]. The research is independent since the issue is understudied. The research is carried out at the junction of constitutional, civil, housing, and labor laws. The emphasis is on the labor and legal rules which makes this work original. Judicial decisions were analyzed. The status of the head and members of collegial executive bodies is regulated both by general and special norms of labor law and provisions of constitutional, civil, and housing legislation. Special legal norms are studied in [3]. The legal status of the head of an organization was studied by L.A. Chikanova [4], V.V. Kuznetsova [5], etc. It is interesting to analyze the legal rules regulating the powers of the subjects managing apartment buildings.
Transition Period of Reforming Shared Construction Participation System in Housing Construction of the Russian Federation: Factors and Risks
Authors: Kubasova Tatiana , Tsvigun Irina
Published: November 2019

The article deals with the issue of emerging risks during the transition period of the ongoing reform in shared construction participation system (SCP system) effective as of 2017. Peculiarities and stages of the transition period in the reform of the SCP system, which is to be replaced in several stages with construction project funding based on escrow, are looked into. It is inferred that the issue has been given sufficient light in scientific publications due to its social and economic relevance, however the issue of detecting and preventing risks during the transition period has not been cleared out enough. The current condition of the Russian construction industry is investigated by means of analysis of statistics data. Major groups of factors, defining current state of the industry, are outlined, as well as analyzed in different aspects (legal, economic, infrastructure). Critical analysis of negative factors of development of construction industry is made; and it confirms possibility of a significant increase in the number of ‘defrauded co-investors’ which contradicts the reform in question.The authors justify the need to identify and delineate risks, develop appropriate measures to reduce them at all stages of the reform in the field of shared construction. Risks and measures to eliminate or minimize risks are identified in accordance with the reform stages. The consequences of realization of risks, which mostly lead to emergence of problem real estate objects and to an increase in the number of “defrauded co-investors”, are identified. Most important measures are outlined, most significant of them being related to increasing transparency and disclosure of the information base associated with the registry of defrauded co-investors. The conclusion is made about necessity to coordinate risk management measures and requirement to create an information base in form of a distributed registry, which will ensure disclosure and transparency, as well as increase confidence of all the interested parties in the ongoing reform.
Import substitution policy in the construction complex of Russia in the context of the national strategy
Authors: Litvintsev Alexey
Published: November 2019

The article analyzes the import substitution strategyas a significant factor of the current economic development of Russia. The article describesimport substitution strategy implementation trends in the construction industry. The Russian import substitution policy is dependent on foreign economic and political factors. It is aimed at ensuring stable and balanced development of the national economy that will be independent of foreign economic relations. At the same time, the import substitution policy can isolate the nation from global economic processes and change its place in the system of international division of labor. The import substitution policyinvolves technological development, optimization of the foreign trade structure, and innovation development. The import substitution policy is based on economic and social expediency and involves production of high-tech products. Import substitution makes it possible to improvenational economic security and implement an innovative development model. This long-term transition results in technological independence of national economic sectors and enhanced competitiveness of national companies in the domestic and global markets. The construction industry plays a special role in implementing the import substitution strategy. It is a basic industry for developing other economic sectors and satisfying social needs. Modernization of the Russian economy depends on the level of competitiveness of the construction industry and
Greenways as a new type of urban green construction at the foreign architectural practice
Authors: Lyapin Andrey , Druzhinina Inna
Published: November 2019

The article overviews the development of a new type of green public spaces - greenways.It describes the creation of the first greenways in the urban agglomeration Raleigh-Chapel Hill in the State of North Carolina. Features and benefits of greenway are identified. The creation of greenways as a new type of green public spacesis connected with post-industrial production and disadvantages of modern urban lifestyle. The article describes aesthetic spiritual benefits of greenwaysfor recreation and revitalization. To illustrate the benefits ofgreenways, results of the analysis of recreational infrastructuresof four cities located in different countries - Nashville, Dresden and Irkutsk- are presented. The greenway project for the northern suburb of Irkutsk developed by the students of Irkutsk National Research Technical University is described. The article concludes that the creation ofgreenways in Irkutsk will improve living standards of city residents and create more favorable opportunities for leisure activities, aesthetic meditation and revitalizationin the open air. Greenways should be created in other cities of Russia.
Man on Baikal: History of Interaction with the Environment
Authors: Naumov I.V.
Published: November 2019

The purpose of this report is to acquaint the recoder with the history of interaction the man wiht Enviroment on Baikal. Environment, natural-climatic and landscape living conditions basically influenced, as known, human history. And, in particular, they influenced economic activities, culture, mode of life and character of folks. Peoples of the World had to consider with environment at each stage of their development. The ancients looked for more favorable places of living for their surviving. Especially they were attracted by big water reservoirs such as rivers and lakes, because living near them was much more easier. Often big water reservoirs served as the source for the conceptions for civilizations. At that time a man was influenced by them and tried to adopt to the environment. He formed the modern image of these reservoirs in the process of his activity. And so a human been and nature historically felt the mutual influence upon each other. And Lake Baikal is not an exception. It has fed and given to drink since the ancient time.
Goals and objectives of municipal property management in current conditions
Authors: Prigozhin Vyacheslav
Published: November 2019

The specific nature of municipal property makes it possible to use it as a tool for development of the municipal territory. Efficient municipal management should be aimed at coordinating goals and objectives of all management subjects related to municipal property objects. The efficient municipal property management system requires a new body coordinating activities of all participants in the existing management system. It is useful to apply the foreign experience of municipal property management and implement international and Russian quality management standards into the activities of local authorities.
Business in the digital economy: russian and foreign experience
Authors: Puchkova Natalia
Published: November 2019

The concept of digital economics is entering our life more confidently every day. In the near future, it can completely supplant the material. Many people have become accustomed to using cashless payments and making online purchases. This type of economy is usually considered as a kind of model that is already functioning to a certain extent. Digital economy is such an economy, where an industrial cyber-physical system acts as an industrial complex, a production system creating products and services, ensuring the life and comfort of a person, the population. The aim of the work is to study the digital economy and its role in the development of entrepreneurship on the example of Russian and foreign experience. The article examines is also given the priorities and main tools for the development of the Russian digital economy, for comparison, the experience of foreign countries. The study identified problems that impede the acceleration of these processes, presented the prospects for the development of the digital economy. The problem of the study lies in the lag of the development of the digital economy of Russia from foreign countries. The object of the study is the digital economy in the development of entrepreneurship. The article used such general scientific methods as analysis and synthesis.
Research of innovative models in construction
Authors: Ruposov Vitaly , Belikov Aleksandr
Published: November 2019

An effective system to implement innovations can be developed due to applying models of innovation processes. The construction market constantly requires the introduction of new technologies that is associated with the economic conditions of the development of the country and the industry. This article presents the results of the research of having been developed innovative models and their applicability to the management of innovation processes to develop the market of innovative constructional materials. The main errors associated with the interpretation of the application of various innovative models are analyzed.
Evolution of the planning structure of retail spaces on the example of Irkutsk
Authors: Ryabchenkova Antonina , Kozmina Tatiana
Published: November 2019

The aim of the research is to study the evolution of the planning structure of the commercial spaces of the city of Irkutsk. A comparative analysis of changes in the structure of retail spaces in different eras from the 19th century to the present has been carried out. The analysis of the literature in which various aspects and features of the formation of the trading axis of the city of Irkutsk, as well as its historical development were studied. Also analyzed the laws and regulations corresponding to different time periods. The necessity of documenting the development of municipalities’ policies on location, development, documenting trade service enterprises in territorial planning, taking into account the minimum supply of population with retail space, the need for analyzing the socio-economic indicators of trade, as well as the effectiveness of measures to develop regional activities.
Concreting in dry hot climate
Authors: Selezneva Olga , Shustov Pavel
Published: November 2019

This article presents the influence of dry hot climate on properties of concrete mix and concrete generally during its production and delivery to construction site. Dry hot climate causes significant water evaporation (i.e. dehydration) of concrete during its setting which can lead to formation of cracks and other deformations of concrete [1÷5]. This experimental research investigating impact of additives on saving workability of concrete mix and on strength of hardened concrete can help in preventing such problems. It was experimentally proved that concrete without additives has significantly lower consistency. A variety of air-entraining additives, superplasticizers, and hyperplasticizers used for preventing loss of mixing water was checked for influence on consistency of concrete mix at high temperature. MC-Techniflow 70 taken as efficient additive is applied in amount of 1,2 % from cement mass, it helps to save workability of concrete mix longer and provides high strength both in 14 days – 29,2 MPa and in brand age of hardening – 35,0 MPa.
Developing physical-chemical principles to manufacture effective heating systems when using mica
Authors: Shishelova T I
Published: November 2019

The organization of effective heating systems in non-industrial, industrial and livestock buildings is an urgent problem. The developing of heating is especially relevant for utilizing in agricultural industry. Energy prices are steadily rising, and as a result, the efficient utilization of energy resources is of great significance for this industry. One of the most prospective lines of development in this area can be the trend to utilize resistive heaters where mica is used as a basic material. The research aim. Developing physical-chemical principles to manufacture effective heating systems when using mica for the construction industry. The possibility of employing composite materials to produce an economically sound, reliable, electro-permissible and stable heater is considered. Finding physical and chemical laws of interaction of mica with the binder element in the technology of micaceous composites. Research methods. The methods of thermodynamic quantum chemical calculations, as well as kinetic studies that involve a number of advanced techniques of physical and chemical studies (x-ray phase analysis, thermal analysis, and IR spectroscopy). Electro physical and mechanical characteristics of composites and starting materials were determined by the standardized methods to comply with the All Union State Standard. Research results. The foundations of effective heating systems when utilizing micalex have been worked out by means of scientific generalizations and experimental studies. The developed technology of electric heating elements (mica ceramic electric heating) is employed in various fields of construction industry.
Formation of mathematical models of stationary dynamics of structures which include thin elastic plates with distributed inertial parameters
Authors: Sobolev Vladimir , Chernigovskaya Tatiana
Published: November 2019

This paper is devoted to the problems of modeling stationary oscillatory processes in elastic systems that contain thin-walled plates. The described method allows us to include the mathematical formalization of thin-walled plates in oscillatory models of elastic structures with irregular boundaries of computational areas and heterogeneous boundary conditions. The formation of dynamic models of this kind is based on the use of discretization methods, in particular, finite element methods that allows approximating the initial models with distributed inertial and rigid parameters — discrete ones with concentration of parameters at certain points — nodes of a dynamic system. Obviously, such approximations are accompanied by errors, the estimation of which is extremely difficult to perform under the conditions of the mentioned heterogeneities and irregularities even in the interval variants. In the present work, the construction of elements of bending stationary vibrations of thin-walled plates under monoharmonic effects is proposed. Possessing all the properties of a finite element, the proposed element contains the values of the distributed masses as parameters. In contrast to the use of discretized parameters obtained by using the classical finite element, the proposed method eliminates discretization procedures and thus, eliminates the process of forming mathematical models from additional errors associated with discretization procedures. This element of mathematical modeling of the dynamics of bending is called a harmonic element (HaE). The proposed method is based on the development of dynamic compliance methods, previously used to simulate oscillations of beam systems with distributed parameters. The developed mathematical models of stationary oscillations of thin elastic plates with distributed inertial parameters make it possible to include them in discrete-continuous models containing infinite-dimensional flexural elements (plates and beams), material points, solids and concentrated elasticities. Thus, dynamic models of structures subjected to harmonic effects are represented by a set of harmonic elements (HaE), which allow harmonic matching of heterogeneous elements under different boundary conditions.
Use of microbial fuel cells and solar collectors in the multifunctional energy container
Authors: Tunik Alexander , Tolstoy Mikhail , Stom Devard , Popova Ekaterina , Popov Valentin
Published: November 2019

The results of studies of a multifunctional energy container are given. The use of microbial-fuel cells for generating electricity, as well as flat liquid solar collectors for generating thermal energy, has been investigated in the energy container.
Methodological aspects of optimization of small enterprises in modern conditions of the Russian economy
Authors: Zakharov Sergey , Shaukalova Alina
Published: November 2019

The work studies the problems of the theory and methodology of the formation of methodological approaches to improving the efficiency of small innovative enterprises, creating the necessary conditions for effective functioning, improvement of the state, and competitive recovery of enterprises. The research is related to the identification of peculiarities and regularities of development of enterprises in innovative small business in the conditions of global competition, the assessment of their status and interactions with external organizations, the determination of the ways of improving the state and conditions of development, selection of directions for improvement.
Classification of Urban Focal Points Based on Cluster Analysis
Authors: Zedgenizov Anton , Strizhakov Evgenii
Published: November 2019

The article presents cluster analysis algorithms used to assess traffic demand and to define the urban territories (focal points (FPs)) as separate clusters (groups) allowing proving/disproving the necessity of territories (FPs) merging on the basis of stated indicators with mathematical precision. The relevance of developing the classification of urban FPs within the context of basic parameters of their functioning is defined. The uniqueness boundary of FP is determined which is used as the base of classifying FPs. The cluster analysis is discussed, namely, its advantages and disadvantages. The goal of the cluster analysis is stated as applied to traffic demand assessment. The cluster analysis is applied to each of 6 enlarged types of territories (FPs): warehousing and utilities; industry; offices; education, healthcare, sport, culture, leisure; trading, public catering, service sector; housing sector.
Quality of Modern Learning Environment and Health-Saving Discourses
Authors: Zheleznyak Olga , Korelina Mirya
Published: November 2019

This paper dwells upon the environmental health as the key feature of a “quality city” that must be prioritized by any educational institution in its development. The research identifies the factors of creating a health-saving environment as well as the specifics of creating learning space at a school. Emphasis is made on designing comfortable space of high aesthetic value, preserving a health-saving environment, implementing ecological resources and natural motifs, creating a unique environment and a positive image, as well as making unique artistic designs psychologically safer. It is important that designs make use of salutogenesis. The presented designs focus on modernizing the learning environment in Irkutsk to improve its quality, to make it help preserve and boost students’ and teachers’ health. Special emphasis is made on the importance of creative environment and nature-aligned lifestyles.
Environmental and economic performance assessment of elemental sulfur recovery unit installation project
Authors: Rybinskaya Elena , Rybinskiy Alexander , Bergen Darya
Published: November 2019

The problem of air pollution is one of the global problems of mankind at the present time. The Irkutsk region has been one of the “leaders” in Russia with the highest excess in air concentrations of maximum permissible concentrations of pollutants during the past decades. The current situation has a very negative impact on the environmental well-being of both adults and children. In the conditions of the prevailing realities, an immediate modernization of production is required, aimed at eliminating or reducing such a prolonged negative impact. The construction and installation of a sulfur recovery unit at oil refineries complies with the latest environmental protection requirements and contributes to a significant reduction in emissions of hydrogen sulfide and sulfur dioxide. The environmental and economic feasibility of such production modernization is illustrated by the example of the Angarsk Petrochemical Company JSC.
Influence of Al Content on Micro-Properties of TiAlSiN Coatings Deposited by Plasma Enhanced Magnetron Sputtering
Authors: Wang Yulong , Zhang Hao , Luo Chengang , Ran Xiaoyu , Ren Zhangpeng , Duo Shuwang
Published: November 2019

TiN coating has attracted substantial attention due to its high hardness and good wear resistance. To meet the current more demanding service environment, Al and Si were added to TiN coating to further improve its comprehensive performance in this work. TiAlSiN coatings with different Al content governed by Al target power were prepared on GH169 superalloy by plasma enhanced magnetron sputtering, and the Al content effects on microstructure and mechanical properties of the coatings were explored in detail. The crystal structure, chemical composition, micromorphology and surface roughness of the coatings were analyzed by XRD, SEM, EDS and AFM, respectively. The mechanical properties of the coatings at room temperature including micro-hardness, elastic modulus and bonding strength were evaluated by nano-indentation and nano-scratch, respectively. With the increase of Al target power, Al content in coatings increased, and the preferred orientation of TiN(111) plane was also more and more obvious. At the same time, the surface morphology of the coatings changed from the round cell shape to the hexagonal star shape. The hardness, elastic modulus and adhesion of the coatings increased first and then decreased with the Al content. The TiAlSiN coating with Al content of 19.25% possesses the best comprehensive properties.
Influences of Melamine Flow Rate on the Growth Behavior of Nanocrystalline Diamond Films by Direct Current Plasma Chemical Vapor Deposition Method
Authors: Wu Chunlei , Liu Yanfeng , Hao Guodong , Zhu Ruihua
Published: November 2019

InCH4/H2 atmosphere, Nitrogen-doped nanocrystalline diamond films were prepared by direct current hot-cathode plasma chemical vapor deposition (PCVD) method on the conditions of different flow rate of Melamine. While the flow rate of Melamine is 2sccm, the grain refining effect on the diamond films is obvious and the nanocrystalline grains protrude from the basis of the film which shape rough surfaces. The films are incompact, due to its large gaps and holes as well as defects, however the conductivity of these films are increased. The increasing flow rate of Melamine promotes the growth of (111) oriented.
An experimental study on the influence of functionalized carbon nanotubes CNT Taunit series on the thermal conductivity enhancement
Authors: Ali A J , Tugolukov E N
Published: November 2019

This paper aims to determine the thermal conductivity for two types of functionalized carbon nanotubes (FCNT “Taunit M”) nanofluids. FCNT1 and FCNT2 have been used to enhance the thermal conductivity of nanofluids. Six concentrations of 0.01, 0.02, 0.03, 0.05, 0.07, 0.1 wt.% loading of FCNT1 and three concentrations of 0.01, 0.05, 0.1 wt.% loading of FCNT2 have been used in this experiment. The experiments were achieved at temperatures 40°C. The technique for measuring thermal conductivity was described and manufactured at Tambov State Technical University. As a result of the study, the effect of increasing concentrations of FCNTs in the aqueous medium on thermal conductivity was presented. The relationship was nonlinear in FCNT1. The maximum enhancement thermal conductivity was 11.6 and 7.1% loading FCNT1 and FCNT2 respectively, which achieved at a weight fraction of 0.05 and 0.1 % respectively. Finally, the latest researches in this field were presented for comparison in the results obtained.
Electrodeposition of MWCNTs/silver composite coatings with enhanced mechanical characteristic
Authors: Litovka Y , Dyakov I , Stolyarov R , Kulakov V , Zhigachev A , Korenkov V
Published: November 2019

The paper describes the technology for producing silver electrochemical coatings containing multi-walled carbon nanotubes (MWCNTs). The MWCNT effect on the roughness, structure and tribological properties of silver coatings obtained with the addition of the nanotubes to an electrolyte in the low concentration range (0 to 80 mg/L). An increase in the microhardness and a decrease in the coefficient of friction were found for the modified coatings at the MWCNTs concentrations in the electrolyte of 40 and 60 mg/L, respectively.
Method of manufacturing of composite for 3D printing and the electrophysical properties of the obtained material
Authors: Dorozhkin K , Tkachev A , Kuleshov G , Badin A , Galunin E , Shematilo T , Suslyaev V
Published: November 2019

The present paper presents the technology for the manufacture of filaments based on ABS plastic and Taunit-M nanomaterial for use in 3D printing. A test sample was printed from this filament on a 3D printer using the layered overlap method at 15% Taunit-M content. The transmittance spectra for the printed sample were obtained using a Mach-Zander interferometer in the frequency range 120-260 GHz. The complex dielectric constant of the studied composite was calculated.
A nanostructuring approach for modification of the features of optical materials: lithium fluoride
Authors: Kamanina N , Kuzhakov P , Kukharchik A , Kvashnin D
Published: November 2019

It is well known that different technical methods and physical-chemical approaches can be used to improve the basic properties of optical materials operated in the UV-VIS-IR spectral range. Laser-based equipment and a nanotechnology approach can be jointly applied with good advantage. In this paper, the advantage of the laser-oriented deposition technique is discussed. Promising nanoobjects based on carbon nanotubes and LiF structures were considered, and their spectral, mechanical and wetting properties were evaluated. It was found the modification of the LiF with the carbon nanotubes improves the optical properties of the former. The quantum chemical simulations confirmed the experimental results obtained. Besides, the changes in the properties of the other classical materials (such as KCl, KBr, MgF2,etc) were comparatively shown.
Fuzzy logical-linguistic model for assessing the qualitative composition of carbon nanomaterials
Authors: Popov A , Polyakov D
Published: November 2019

The paper considers the development of methodological approaches to assessing the qualitative composition of carbon nanomaterials (nanotubes) and predicting their behavior in processes based on the theory of fuzzy sets. The state of the nanotechnology industry is analyzed, and the problematic moments of its development are highlighted. The necessity of proposing new approaches to evaluate nanomaterials due to the specificity of their properties is substantiated. The trends in the industrial use of carbon-based nanomaterials are identified, and the importance of their rational application based on an objective description of the qualitative composition of carbon nanomaterials for the development of the nanotechnology industry is shown. In this regard, it is proposed to use the mathematical apparatus of the theory of fuzzy sets, linguistic variables, and corresponding mathematical methods considering expert opinions and experimental results. A mathematical model created allows to predict the behavior of the nanotubes in various processes and solve the problem of the latters’ optimization.
Improved microhardness of chrome galvanic coatings with combining nanodiamonds and nanotubes
Authors: Litovka Yu , Nasraoui M , Dolmatov V
Published: November 2019

The method is developed for obtaining nanomodified galvanic coatings by adding a mixture of nanomaterials to the electrolyte. An experimental study of the microhardness of the precipitate of the technological process of obtaining nanomodified by a combination of nanodiamonds and multilayer carbon nanotubes; by a combination of single-layer carbon nanotubes and multilayer carbon nanotubes of chromium galvanic coating from a standard electrolyte was carried out. When nanodiamonds 12 g/l and multilayer carbon nanotubes “Taunit” 80 mg/l are added to the electrolyte, the microhardness of the chromium coating increases by 27% compared to the chromium coating obtained from the standard chromium plating electrolyte without additives. When single-layer carbon nanotubes 50 mg/l and multilayer carbon nanotubes “Taunit” 80 mg/l are added to the electrolyte, the microhardness of the chromium coating increases by 22% compared to the chromium coating obtained from the standard chromium plating electrolyte without additives. The service life of the parts, the chrome coating on which is obtained from the electrolyte with a mixture of nanodiamonds and multilayer carbon nanotubes “Taunit”, single-layer carbon nanotubes and multilayer carbon nanotubes is significantly higher than when using a traditional chrome coating, as well as using multilayer carbon nanotubes, single-layer carbon nanotubes or nanodiamonds separately.
Conductivity of a carbon nanotubes-epoxy resin nanocomposite
Authors: Blokhin A , Zaytsev I , Sukhorukov A , Stolyarov R , Popov A , Burmistrov I , Kobzev D , Yagubov V
Published: November 2019

Multi-walled carbon nanotubes (CNTs) were used to reduce the electrical resistivity (i.e., increase the conductivity) of industrial epoxy. Samples loaded with 6 wt.% CNTs showed a 9-fold increase in the conductivity. The starting epoxy resin is dielectric. The electrical resistivity data showed a percolation threshold between 0.5 and 2 wt.% CNTs loading. The temperature coefficient of electrical resistivity of the samples containing 2 wt.% in the temperature range from 20 to 60°C was 11.5·10-3 K-1. These results suggested that the conductivity of the CNTs-epoxy composites is improved, without any need for chemical functionalization of the nanotubes.
Physical-chemical properties and catalytic activity of the Ni-Co-CB material
Authors: Andrienko O , Kobotaeva N , Skorokhodova T , Marakina E , Sachkov V
Published: November 2019

Carbon materials are widely used in catalysis as a support for active catalyst components due to their chemical inertness and developed surface. The most common carbon carriers are represented by activated carbons, carbon black and various carbon-carbon composites. In petrochemistry, carbon materials are also employed as catalysts to oxidize sulfur compounds contained in heavy fractions of oil being refined. In this regard, the present paper discusses the issues of metal-carbon composite material manufacturing. Technical carbon, or carbon black (CB), was used as a carbon support, the surface of which was modified with nickel and cobalt. The resulting composite material, Ni-Co-CB, has a high specific surface area comparable to that of the pristine carbon material, thereby favoring its catalytic activity. The high catalytic activity of the composite material developed was observed during oxidative desulfurization of heavy oil feedstock. Hence, the degree of sulfur removal for fuel oil was found to be 82.7 %, whereas for oil it reached 70.7 %.
The method and the device for measuring thermophysical properties of liquids
Authors: Divin A , Ponomarev S , Petrasheva M , Lyubimova D , Mozgova G , Belyaev P , Shishkina G
Published: November 2019

This paper describes the new method and the device for measuring the effective thermophysical characteristics of the investigated fluid under shear flow conditions at a fixed shear rate in the gap between coaxial cylinders. The shear flow is provided by the rotation of the outer cylinder while the inner cylinder remains stationary. The measuring unit can measure the complex rheological and thermophysical characteristics of liquids in less than 30 minutes. This article describes a two-step measurement method. The first step involves the measurement of the excess temperature established because of the heat source action due to the viscous friction in shear flow of the test liquid in a layer between the cylinders; the function of the dissipative heat source in the fluid at this stage is based on the power-law. The second step includes the thermal effect on the liquid layer from the heat source (electric heater) in the inner cylinder and the registration of the temperature response in the inner cylinder layer near the heater. The experimental determination results of polyoxyethylene solution thermophysical characteristics with the addition of nanocarbon material “Taunit” are presented here.
Production of few-layer and multilayer graphene by shearing exfoliation of graphite in liquids
Authors: Pershin V F , Krasnyanskiy M N , Alhilo Z A A , Al-Mashhadani A M R , Baranov A A , Osipov A A
Published: November 2019

The article describes the process of liquid-phase shear exfoliation of graphite in a rotary apparatus with moving blades, in water and I-20A oil (Rosneft, Russia) used as a liquid. The linear dependence of the process intensity on the shear rate and graphite concentration in the initial suspension are established in the paper. To increase the share of graphene converted into graphene plates, it has been proposed to reduce periodically the concentration of graphene plates in suspension by adding pure liquid. It was found that the exfoliation rate of graphite is directly proportional to the concentration of graphite in the initial suspension and the rotor speed. The resulting graphene-containing oil-based suspension was used to modify greases.
Development of thermo-electrochemical cells based on flexible nanocomposite electrodes with oxidized multi-walled carbon nanotubes coating
Authors: Shpekina V , Burmistrov I , Gorshkov N , Artyukhov D , Kiselev N , Kovyneva N , Smirnova Y
Published: November 2019

While conversion of low-grade waste heat into electricity is an important energy harvesting strategy, the thermo-electrochemical cells are one of the most promising devices for this application. This paper shows the study on thermo-electrochemical cell with polymer electrodes coated by oxidized multi-walled carbon nanotubes and the Fe(CN)6
3-/Fe(CN)6
4- based electrolyte. The developed cell demonstrates the current density values of more than 13 A/m2 and a specific power of 140 mW/m2. Hypothetical Seebeck coefficient was found equal to 0.7 mV/K by the calculation based on the temperature dependencies of the open circuit voltage.
Investigation of the properties of two-dimensional molybdenum disulfide films synthesized by the CVD method
Authors: Smagulova S , Semenova A , Zakharkina E , Vinokurov P
Published: November 2019

Molybdenum disulfide films were synthesized through chemical vapor deposition. Optimal synthesis parameters (temperature, time, gas pressure, gas flow rates, and geometrical arrangement of substrates and crucibles with precursors), allowing for the growth of single-layer domains of molybdenum disulfide with maximum domain sizes (250 μm), were found. The technology for processing substrates, including mechanical, chemical and plasma-chemical processing, was developed. The results of studies on the structural, optical, electrical properties of the synthesized and transferred films using optical, scanning electron and atomic force microscopes, elemental analysis, measurement of Raman scattering spectra, luminescent and electrical characteristics are presented.
Plasma-chemical synthesis of carbon nanotubes and graphene with mesoporous architecture for energy applications
Authors: Shavelkina M , Shkolnikov E , Kochanova S , Sidorova E
Published: November 2019

We develop the universal technique of producing the mesoporous carbon nanomaterials. We manage to synthesize, in one and the same reactor, in the different regimes, carbon nanotubes and graphene. The technique consists in conversion of the carbon containing substances in the helium plasma flow generated by the plasma torch at low pressure. We investigate the samples using the scanning electron microscope and the synchronous thermal analysis. The studies, by the limited evaporation method, of the porous structure show that the graphene flakes and the balled nanotubes are mesoporous and thus provide the specific capacity value rather high for the electrochemical electrodes of the supercapacitor (125–133 F/g) at the charging/discharging resistance of 121/100 Ω.
Fireproof intumescent systems modification by means of phosphorus-containing metal/carbon nanocomposites for construction applications
Authors: Mustakimov R. , Kodolov V. , Kodolova-Chukhontseva V.
Published: November 2019

In the present paper, a method for modifying a copper/carbon nanocomposite with ammonium polyphosphate is considered. The optimum ratio of reagents at the modification of composite was found using infrared and X-ray photoelectron spectroscopy. Experimental tests were carried out for samples of fireproof intumescent coatings based on epoxy resins modified with the phosphorus-containing copper/carbon nanocomposites. An increase of more than 20 % in such properties as adhesive durability and fire-retardant performance for the coatings modified with the above nanocomposites was determined.
Production of graphene concentrates based on synthetic oils in rod drum mills
Authors: Pershin V F , Zhumagaliyeva G B , Tkachev A G , Pasko A A , Vorobyev A M
Published: November 2019

The article presents the results of the refinement of the mathematical model of the process of liquid-phase shear exfoliation of graphite and experiments on the production of graphene concentrates based on synthetic oils in a rod drum mill. The model parameters were identified and its adequacy to the real process was experimentally confirmed. It is given the dependence of the coefficient of light absorption, which characterizes the average integral value of graphene layers in suspension particles and their concentration on the processing time.
Features of optimization synthesis of equipment for feeding nanodispersed materials
Authors: Popova A , Shubin I , Kucherova A , Memetov N , Tarov D
Published: November 2019

For the first time, in the analysis of the behavior of a nanodispersed material (i.e., its outflow and batching from the hopper unit, as well as movement and mixing), a conventional approach was used to calculate the hardware and technological design of its functionalization. Besides, the features of the behavior of the nanodispersed layer and single nanoparticles as applied to the feeding process from the hopper under vibrations, its movement along the guide blade and the pouring of the flow into the receiving tank were considered, dependencies were formulated, and recommendations were given for designing the hopper assembly used to process the nanodispersed materials. The results were tested and showed high convergence in practical implementation.
Egyptian propolis 14: Potential antibacterial activity of propolis-encapsulated alginate nanoparticles against different pathogenic bacteria strains
Authors: Hegazi A G , El-Houssiny A S , Fouad E A
Published: November 2019

The present study evaluates the synergistic antimicrobial effect of the propolis-encapsulated alginate nanoparticles (propolis-ALg NPs) against different pathogenic bacteria. The prepared samples were characterised by transimissin electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), zeta potential and dielectric spectroscopy. The morphological analysis using TEM revealed that, the propolis-ALg NPs are spherical, discrete and have a small particle size (13 nm) in the nanometer scale. FTIR studies showed a spectral change of the characteristic absorption bands of ALg NPs after being encapsulated with propolis. A high negative zeta potential value is obtained for propolis-ALg NPs which indicates a high suspension stability of the prepared formulation. The dielectric study showed a decrease in the dielectric constant (ε′), dielectric loss (ε″) and conductivity (σ) values after the incorporation of the propolis into ALg NPs. All these investigations confirm the successful encapsulation of propolis within ALg NPs. On the other hand, the propolis-ALg NPs sample showed the highest antimicrobial activity against all examined pathogens in comparison with pure propolis and/or antibiotic (clindamycin). So, it can be concluded that the propolis-ALg NPs exhibited a synergistic antibacterial activity against different bacterial strains.
Quantum percolation in quasicrystals using continuous-time quantum walk
Authors: Chawla Prateek , Ambarish C V , Chandrashekar C M
Published: November 2019

We study the percolation of a quantum particle on quasicrystal lattices and compare it with the square lattice. For our study, we have considered quasicrystal lattices modelled on the pentagonally symmetric Penrose tiling and the octagonally symmetric Ammann-Beenker tiling. The dynamics of the quantum particle are modelled using the continuous-time quantum walk (CTQW) formalism. We present a comparison of the behaviour of the CTQW on the two aperiodic quasicrystal lattices and the square lattice when all the vertices are connected and when disorder is introduced in the form of disconnections between the vertices. Unlike on a square lattice, we see a significant fraction of the quantum state localized around the origin in the quasicrystal lattices. With increase in disorder, the percolation probability of a particle on a quasicrystal lattice decreases significantly faster when compared to the square lattice. This study also sheds light on the fraction of disconnections allowed to see percolation of quantum particle on these quasicrystal lattices.
CATHER: a novel threading algorithm with predicted contacts
Authors: Du Zongyang , Pan Shuo , Wu Qi , Peng Zhenling , Yang Jianyi
Published: November 2019

Motivation

Threading is one of the most effective methods for protein structure prediction. In recent years, the increasing accuracy in protein contact map prediction opens a new avenue to improve the performance of threading algorithms. Several preliminary studies suggest that with predicted contacts, the performance of threading algorithms can be improved greatly. There is still much room to explore to make better use of predicted contacts.

Results

We have developed a new contact-assisted threading algorithm named CATHER using both conventional sequential profiles and contact map predicted by a deep learning-based algorithm. Benchmark tests on an independent test set and the CASP12 targets demonstrated that CATHER made significant improvement over other methods which only use either sequential profile or predicted contact map. Our method was ranked at the Top 10 among all 39 participated server groups on the 32 free modeling targets in the blind tests of the CASP13 experiment. These data suggest that it is promising to push forward the threading algorithms by using predicted contacts.

Availability and implementation

http://yanglab.nankai.edu.cn/CATHER/.

Supplementary information

Supplementary data are available at Bioinformatics online.
Proactive visual and statistical analysis of genomic data in Epiviz
Authors: Cui Zhe , Kancherla Jayaram , Chang Kyle W , Elmqvist Niklas , Corrada Bravo Héctor
Published: November 2019

Motivation

Integrative analysis of genomic data that includes statistical methods in combination with visual exploration has gained widespread adoption. Many existing methods involve a combination of tools and resources: user interfaces that provide visualization of large genomic datasets, and computational environments that focus on data analyses over various subsets of a given dataset. Over the last few years, we have developed Epiviz as an integrative and interactive genomic data analysis tool that incorporates visualization tightly with state-of-the-art statistical analysis framework.

Results

In this article, we present Epiviz Feed, a proactive and automatic visual analytics system integrated with Epiviz that alleviates the burden of manually executing data analysis required to test biologically meaningful hypotheses. Results of interest that are proactively identified by server-side computations are listed as notifications in a feed. The feed turns genomic data analysis into a collaborative work between the analyst and the computational environment, which shortens the analysis time and allows the analyst to explore results efficiently.

We discuss three ways where the proposed system advances the field of genomic data analysis: (i) takes the first step of proactive data analysis by utilizing available CPU power from the server to automate the analysis process; (ii) summarizes hypothesis test results in a way that analysts can easily understand and investigate; (iii) enables filtering and grouping of analysis results for quick search. This effort provides initial work on systems that substantially expand how computational and visualization frameworks can be tightly integrated to facilitate interactive genomic data analysis.

Availability and implementation

The source code for Epiviz Feed application is available at http://github.com/epiviz/epiviz_feed_polymer. The Epiviz Computational Server is available at http://github.com/epiviz/epiviz-feed-computation. Please refer to Epiviz documentation site for details: http://epiviz.github.io/.
Fusion-Bloom: fusion detection in assembled transcriptomes
Authors: Chiu Readman , Nip Ka Ming , Birol Inanc
Published: November 2019

Presence or absence of gene fusions is one of the most important diagnostic markers in many cancer types. Consequently, fusion detection methods using various genomics data types, such as RNA sequencing (RNA-seq) are valuable tools for research and clinical applications. While information-rich RNA-seq data have proven to be instrumental in discovery of a number of hallmark fusion events, bioinformatics tools to detect fusions still have room for improvement. Here, we present Fusion-Bloom, a fusion detection method that leverages recent developments in de novo transcriptome assembly and assembly-based structural variant calling technologies (RNA-Bloom and PAVFinder, respectively). We benchmarked Fusion-Bloom against the performance of five other state-of-the-art fusion detection tools using multiple datasets. Overall, we observed Fusion-Bloom to display a good balance between detection sensitivity and specificity. We expect the tool to find applications in translational research and clinical genomics pipelines.

Availability and implementation

Fusion-Bloom is implemented as a UNIX Make utility, available at https://github.com/bcgsc/pavfinder and released under a Creative Commons License (Attribution 4.0 International), as described at http://creativecommons.org/licenses/by/4.0/.

Supplementary information

Supplementary data are available at Bioinformatics online.