bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical modeling of deformation of pre-stressed steel trusses taking into consideration the possibility of emergencies
Authors: Serpik I N , Tarasova N V 
Published: December 2019

Abstract
An algorithm of finite-element modeling has been developed in a geometrically non-linear setting of steel plane trusses which are pre-stressed using high strength cables, in the event of emergency in the form of single cable breakage. The application of framework gravity forces, consecutive introduction of tie bars and their pre-stressing, application of running load and emergency impact have all been monitored. Herewith, the condition of static loading using the dynamic relaxation method has been simulated. A factor taken into consideration is non-linearity associated with the inclusion of new cables into the framework, analysing the possibility of their behaviour strictly under tension, and removal of a cable from the loading system in the event of its breakage. The problem has been solved using numerical integration based on the development of the Newmark method via deriving equations of equilibrium of a discretised structure in the deformation state during each step of integration. The operability of the suggested algorithm is illustrated by the example of a steel truss with a span of 60 m, including two cables. The dynamic behaviour of an object is considered at a sudden breakage of the pre-stressed cable.
Search for Cold Bridges Based on the Building Information Model Collisions Analysis
Authors: Ignatova E V 
Published: December 2019

Abstract
The energy-efficient buildings construction requires careful consideration of the building external structures heat loss possible causes. One of the reasons for heat loss is the cold bridges presence in the building external circuit. This article discusses the material cold bridges causes, i.e. energy leakage through more conductive materials. Some analysis methods of cold bridges and possible methods of their elimination are considered. The main attention is paid to the automated search for cold bridges at the building design stage using BIM technologies. It is proposed to analyze the building information model data, using the geometric objects finding collisions method. The algorithm includes the building elements determination that crosses the building thermal contour and such elements materials analysis for their ability to heat transfer. The advantages and limitations of the proposed method are discussed.
Analysis of power characteristics in the elements of the active Dead-End stop based on the double wedge system
Authors: Demianov A A , Demianov A A , Donchenko A V , Pavlitskiy B I 
Published: December 2019

Abstract
The dead-end stops that are installed at the truck ends and differ from each other in their design and principle of repayment of the kinetic energy of a moving object are used to improve the operation security of the rail lift and transport facilities. However, the main task of any dead-end stop is to stop the lift and transport facility at the minimum braking distance. Inadequate braking “smoothness” can cause a derailment or destruction of the lift and transport facility, so it is preferable to use dead-end stops excluding the impact during the braking and ensuring a smooth increase of the braking effect. The dead-end stop construction with the effect of increasing resistance forces is proposed, which meets these conditions, that can be used both for lift and transport facilities and for the rail rolling stock. In addition, the analysis of power characteristics in the spot elements was made and analytical dependencies for engineering calculations were developed.
The steel defects investigation by the Eddy current method
Authors: Dmitriev S , Malikov V , Ishkov A 
Published: December 2019

Abstract
The paper describes the gage system designed for the various properties materials study. Within the study frameworks, the sections of pipes made of a new material — high-strength steel 08G2B of K65 steel grade were studied. These materials are ultra-low-carbon steels, wherefore it is possible to study their properties using the eddy current method. A subminiature eddy current transducer consisting of three windings on a core made of 81NMA alloy was used during the study. The resulting parameter of the gage system, which contains information on the object under study, was the change in the eddy current transducer signal. In this study, the samples with continuity defect models — cracks and holes — were investigated, and a study was conducted to simulate the corrosion presence in the metal.
Simulation Network-Level Relationships of Traffic Flow
Authors: Zyryanov V 
Published: December 2019

Abstract
The paper considers capabilities of the macroscopic fundamental diagram of traffic flow to predict the conditions of operation of the road network in urban areas. This study examines relationships of traffic flow parameters on the network level. Microscopic traffic simulation has provided important data on the estimation of road capacity, velocity, trip time, and detection of congestions reasons. Data of spatial distribution density in network useful for implementing approach based on gating policy on subnetwork using MFD. It presents the results of a simulation using the example of central area of Rostov-on-Don.
Protection of unmanned vehicles from component failures
Authors: Moroz Sergey 
Published: December 2019

Abstract
For the transfer of road transport to unmanned driving, it is necessary to create not only technologies for automatic control of the movement of vehicles, but also technical measures to protect them from failures of components of unmanned vehicles. Such protection will ensure the development of monitoring the performance and operational properties of unmanned vehicles in combination with algorithms for the use of its results. The purpose of this work is to substantiate the methods of automation of control parameters of performance of unmanned vehicles and the construction of protective control algorithms of unmanned vehicles in the interests of technical operation. A new method of automatic control of parameters dependent on the technical condition, modes and operating conditions of vehicles is proposed. It is based on the simultaneous control of the parameters of the technical condition, mode and operating conditions of the tested component, the division of the ranges of possible changes in the parameters of the mode and conditions at narrow intervals, the formation of possible combinations of the intervals obtained and registration of the standards of the estimated parameter for each combination of intervals at the beginning of operation of an unmanned vehicle. The proposed method is intended for the implementation of the onboard local network of an unmanned vehicle.
Integrated information system for improving strategic management of urban system
Authors: Bulychev Lev , Larinina Tatyana , Lukinov Vitaly 
Published: December 2019

Abstract
The paper studies the current problems in the development and implementation of innovative strategies for the development of municipal infrastructure of the city through the creation of mechanisms to support the management intellectualization in the industry. Intelligent monitoring of housing and communal complex will allow improvement of the system of management of territories and ensuring the timely adoption of adequate administrative decisions on coordination of economic actors forming the social and production infrastructure of municipalities. The most promising direction in this field is geographic information systems.
Calibration of the prediction model for fatigue damage accumulation in asphalt courses of flexible pavements for the conditions specific to the Russian Federation
Authors: Uglova E V , Tiraturjan A N , Eganyan G V 
Published: December 2019

Abstract
The article dwells on the asphalt pavements fatigue life matter. The authors suggest a fatigue damage prediction technique based on the NCHRP modified model and the MMOPP model of structural deterioration of asphalt courses. The research resulted in the fatigue cracking main algorithms verification and calibration performance prediction based on the analysis of actual conditions of the M4 Don Highway pavement which makes it possible to significantly improve the prediction results reliability for the conditions specific to the Russian Federation.
Improving the quality of low-rise housing construction projects
Authors: Tsopa N V , Malakhova V V , Kovalskaya L S 
Published: December 2019

Abstract
The main priority of the social and economic policy in Russian Federation is to solve the housing problem. The national project “Affordable and Comfortable Housing for the Citizens of Russia” is an important form of implementation the modern housing policy. The expansion of low-rise buildings is influenced by the housing policy. Existing methods for assessing the quality of low-rise building projects require further development. The issues of improving the quality of low-rise building projects require further system improvement of quality assessment indicators too. Quality assessment takes into account indicators of safety, comfort and resource saving. Mechanism for improving the quality of low-rise building projects is proposed in this paper.
The basis of this mechanism is a system of indicators for assessing the projects quality at the predesign stage. Approbation of the proposed mechanism was made using the example of the construction of Izumrudny cottage complex in Gorny village, Yalta.
Method of cost efficiency analysis for solar batteries installation using intensity of solar radiation
Authors: Kuzovleva I A , Blagoder T P , Kuleshova V I 
Published: December 2019

Abstract
Article systematically considers the main aspects of the cost efficiency field of innovative projects introducing solar radiation as an alternative energy source. The article offers a proprietary methodology of cost efficiency analysis for solar panels installation using the intensity of solar radiation (insolation). The calculations carried out using this method determined the amount of annual economic benefit of installing innovative solar panels.
Methodological aspects of providing balanced innovative development of construction complex of the Russian Federation
Authors: Geraskina I N , Kuligin K N 
Published: December 2019

Abstract
The growth of significance of economy’s innovative development of the Russian Federation determines necessity of deeper investigation of properties and specific features of its subsystems functioning, contents and forms of interaction thereof, seeking ways of increasing efficiency of control system. The construction complex (hereinafter referred to as the CC) as a priority area of the national economy, actively influences it and largely determines the trend of functioning, as well as the quality of life of the population. Construction, acting as the locomotive of the socio-economic development of the country and having a high cumulative potential, is associated with almost all industries and related fields of economic activity. Despite the fact that investment and construction activity makes a significant contribution to the growth of macroeconomic indicators of the Russian Federation, it is studied without a detailed understanding of the immanent properties and patterns of development as a complex self-regulating system. The strategic benchmarks for the development of the CC are structured by the demands of consumers not only in a safe, but also comfortable living environment with high environmental characteristics and aesthetic requirements. Meeting such requirements is possible under the condition of large-scale modernization of the construction sector with the use of breakthrough scientific and technical solutions in all segments of human activity. All this gives grounds for concluding that a fundamental change in the approach to the study of properties, features and factors of the development of the CC is necessary, which provokes the modernization of the management system to ensure a balanced innovation trend and high standards of quality of life of the population. Important factors in the development of the CC are fair competition, freedom of economic activity, the development of market mechanisms, corporate culture and moral values. The study of the functioning and scientific approaches to ensuring a balanced innovative development of the CC of the Russian Federation made it possible to form a conceptual vision and methodological basis taking into account the main provisions of the theories of systems, self-organization and synergetics and to briefly present it in this work.
Methodology for assessment of repair and restoring potential of real estate
Authors: Avilova I P , Naumov A E , Ursu I V , Abakumov R G 
Published: December 2019

Abstract
Buildings and structures, as complex technological objects ensuring the effective functioning of a number the urban development environment social processes, need periodically technical updating, conceptually viewed from the standpoint of expedient reconstruction. The respective budgets rational strategic and operational planning issues directed to the immovable complexes’ reconstruction should be considered from the standpoint of both technical and town-planning expediency of reconstruction determined by a number of the object key indicators of reconstruction forming its urban-planning reconstruction potential. Particularly acute is the reconstruction rationality quantitative assessment question when implementing the investment programs financed by municipal and federal budgets, in which the integrated reconstruction of the territory is most effective. The reconstruction resource intensity is made up of the territory individual objects local resources - interrelated territorial functions carriers. The methodological approaches and algorithms for constructing a quantitative assessment of the property repair and restoration potential can be an effective complement to methods of dynamic analysis and the urban planning potential effectiveness evaluation of the actively developed territories. The paper demonstrated the practical use examples of the proposed methodologies, proposed methodological approaches to their integration into practical software industry.
The organizational-technological decisions acceptance support system in the investment and construction projects management
Authors: Zelentsov L B , Mayilyan L D , Hakobyan N G , Pirko D V 
Published: December 2019

Abstract
The article discusses the problems of making organizational and technological decisions in the investment and construction projects (ICP) management using intelligent construction management systems (“IMS Construction”).
The relevance of the study is due to the fact that in economic instability conditions in the Russian Federation, the construction organizations need to increase the organizational and technological decisions efficiency in order to reduce production costs.
The ISU “Construction” introduction allows the managerial decision-making of two independent areas integration in the implementation of ICP, based on the rules and precedents related to the methods of generating new knowledge, which allows to get a new impetus in the intelligent control systems development.
The greatest interest in using the proposed methodology formalized in the IMS “Construction” development is the possibility of accumulating knowledge about the ICP control system possible behavior, which is more likely to predict the right decision adoption in the event of any situations that have not been previously met or recognized.
Theoretical and experimental studies of dust in jobs in concrete production
Authors: Evtushenko A I 
Published: December 2019

Abstract
The article discusses and analyzes well-known scientific approaches to assessing the dust content of jobs at enterprises in the construction industry in the production of concrete. Boundaries are defined for the description of the log-normal distribution of particles and the probabilistic – stochastic approach to the description. The author presents the results of experimental studies at factories and enterprises for the production of ready-mixed concrete, reinforced concrete structures and products. The research direction is determined, recommendations are given.
Investigation of the dynamic variability in the amount of contaminants in urbanized atmosphere
Authors: Menzelintseva Nadezhda , Karapuzova Natalia , Laktiushin Vadim , Bogomolov Sergey 
Published: December 2019

Abstract
The dynamic variability in the amount of contaminants in urban atmosphere and the mathematical models which allow describing the given variability have been analyzed. The models of the seasonal variation in the amount of solid particles in the atmosphere of Volgograd were developed based on Fourier series. The seasonal index was determined. A dynamic equation characterizing the seasonal variability in the amount of solid particles in the atmosphere of Volgograd was obtained applying the method of analytical seasonal adjustment.
Synthesis and charactherization of TiO2 doped SnO2 thin film prepared by sol-gel method
Authors: Halin Dewi Suriyani Che , Razak Kamrosni Abdul , Azani Azliza , Abdullah Mohd Mustafa Al Bakri , Salleh Mohd Arif Anuar Mohd , Mahmed Norsuria , Shafee Nur Syahirah , Ramli Muhammad Mahyiddin , Azhari Ayu Wazira , Chobpattana Varistha 
Published: December 2019

Abstract
In this work, preparation of titanium dioxide doped with tin oxide, SnO2/TiO2 thin films deposited onto silicon wafer via sol-gel method. Different amount of SnO2 was added (5 ml, 10ml and 15 ml) into parent solution. The obtained films were annealed at different temperature which is 400°C, 500°C and 600°C for 1 hour. Morphological and surface topography of the SnO2 doped TiO2 thin films were studied using Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM). The annealed films shows non-uniform crack due to the mismatch of coefficient of thermal expansion (CTE) between SnO2/TiO2 thin films and silicon wafer.
Microstructural studies of doped PEG Ag/TiO2 thin film
Authors: Razak Kamrosni Abdul , Halin Dewi Suriyani Che , Azani Azliza , Abdullah Mohd Mustafa Al Bakri , Salleh Mohd Arif Anuar Mohd , Mahmed Norsuria , Chobpattana Varistha , Azhari Ayu Wazira 
Published: December 2019

Abstract
Ag/TiO2 thin film was prepared by the sol-gel method through the hydrolysis of titanium tetraisopropoxide and silver nitrate solution. Various amount of PEG was doped into the solution preparation to study the effect on crystalline state and microstructural of the prepared thin films. Spin coating method was used to get uniform film on ITO glass substrate followed by annealing process for 1 hour. The obtained thin films were analysed using XRD test, SEM and AFM. Results showed that all the prepared thin films are in anatase TiO2 Increasing the PEG amount into the solution could increase the thickness and surface roughness of the obtained thin films.
Influence of cooling conditions on the interfacial Cu6Sn5 intermetallic compound in Sn-37Pb/Cu solder joints during reflow
Authors: Somidin Flora , McDonald Stuart , Akaiwa Tetsuya , Nishimura Tetsuro , Nogita Kazuhiro 
Published: December 2019

Abstract
Despite a shift to Pb-free solders in the majority of electronic assemblies, Pb-containing solders are still used in a variety of applications. Recent research has revealed the complexities of the intermetallic Cu6Sn5 in terms of its crystal structure and stability when present as the reaction product between Pb-free solders and common substrates. In light of these findings, the effect of multiple reflow cycles with different cooling conditions on the microstructure of the interfacial Cu6Sn5 intermetallic compound (IMC) between Sn-Pb solders and Cu substrates was re- examined. For this purpose, the Sn-37Pb (in wt.%) solder was reflowed on a Cu substrate at a temperature of around 240 °C and cooled at a rate of around 30 °C/min under each of two conditions; (i) direct-cooling to room temperature, and (ii) interrupted-cooling with extended isothermal holding periods of 30 and 180 seconds at 140 °C. This second condition was chosen to encourage the polymorphic transformation that occurs in the Cu6Sn5 (at an equilibrium temperature of 186 °C) at a temperature which minimises the stresses involved. Smaller cracks and a thinner interfacial IMC layer were observed in the solder joints that were reflowed repeatedly with the interrupted-cooling conditions. However, despite the higher number of cracks in the samples undergoing conventional reflow, the shear strength was not significantly affected.
Effect of Zn addition on Cu3Sn formation in Sn-10Cu alloys
Authors: Mehreen Syeda U. , Nogita Kazuhiro , McDonald Stuart , StJohn David 
Published: December 2019

Abstract
Sn-Cu alloys have generated interest as potential candidates for high-temperature soldering applications, as they are economically feasible and environmentally safe. Sn-Cu alloys with copper contents beyond 7.6wt.% solidify with a primary Cu3Sn phase, followed by peritectic and eutectic reactions. Typically, phases which form as elongated needles are undesirable, as they tend to be more brittle and in turn reduce the strength and toughness of the alloy. The effect of Zn on the peritectic reaction and phase formation in a Sn-10wt.%Cu alloy is investigated through cooling curves and microstructural analysis using optical and electron microscopy. Zn was alloyed in the range of 0.1-1wt.% to the base Sn-10Cu alloy system. The results indicate that the amount of the primary Cu3Sn phase that forms is inversely proportional to the concentration of Zn. Although complete suppression of Cu3Sn was not observed, there was a clear effect of Zn reducing the amount of the primary Cu3Sn phase, with the greatest reduction of Cu3Sn occurring with a 1wt.% Zn addition. The reduction of the elongated needle-shaped primary Cu3Sn phase may find application in the development of more reliable bulk solder microstructures.
The influence of graphite on conductivity, crystallinity and tensile properties of hydroxyethyl cellulose (hec) / graphite composite films
Authors: Hanif Mohd Pisal Mohd , Jalilah Abd. Jalil , Badrul Farah , Nuraqmar Syed Mahamud Syarifah 
Published: December 2019

Abstract
Conductive films based on natural polymers may find potential in food packaging and biomedical applications owing to their advantages of biodegradability and biocompatibility. This work demonstrated conductive composite films from hydroxyethyl cellulose (HEC) incorporated with graphite prepared by solution casting. Fourier Transform Infrared (FTIR) spectra confirmed the absence of covalent bond between the HEC matrix and graphite. The electrical conductivity of the composite films with various concentrations of graphite was investigated by a four-point probe. We observed that the conductivity of the HEC film increased remarkably from 10−8 S/cm to 10−5 S/cm upon addition of graphite. The highest conductivity of 9.44 x 10−5 S/cm to 10−5 S/cm upon addition of graphite. The highest conductivity of 9.44 x 10−5 S/cm was obtained for the film with 30 wt% of filler and further addition of filler reduced the conductivity. The correlation between conductivity and crystallinity was elucidated by X-ray diffraction (XRD) patterns. The difference in d-spacing values between HEC and HEC/Graphite films and the decrement of crystallinity percentage suggest that the rearrangement of ordered HEC crystalline structure was perturbed by the filler resulting in reduction of crystallinity phase. The tensile properties results clearly show that the incorporation of graphite into HEC films has reduced the tensile strength which is in agreement with the obtained electrical conductivity and crystallinity percentage.