bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical Modelling of Vortex Dust Separator
Authors: Akhmetov Vadim , Akhmetova Valentina 
Published: November 2019

Abstract
The problem of the motion of a swirling flow in an axisymmetric channel is investigated numerically. The flow field calculation results have been obtained as the solutions of the Navier-Stokes equations. Various flow regimes with the formation of axial recirculation zones are presented. The convection-diffusion model is used for the determination of the flow particle concentration and the formation of typical sedimentation zones.
Laboratory Tests Analysis of Reinforced Concrete Structures Strengthened with CRFP
Authors: Rimshin Vladimir , Kuzina Ekaterina 
Published: November 2019

Abstract
Modern construction industry is constantly evolving and improving. Therefore, new opportunities are used to solve the constantly emerging new problems. One of the modern innovations in these areas is the use of carbon-fiber nonwoven fabric for strengthening structures and composite materials. Carbon fibers have several advantages in increasing the bearing capacity of the structure: high modulus of elasticity (240-640 GPa) and tensile strength (2500-4000 MPa), minimal coefficient of thermal expansion (approximately 50 times less than steel), high fatigue characteristics, excellent resistance to aggressive environments, withstands many cycles of «freeze-thaw». One of the promising areas for the development for strengthening concrete structures with carbon fiber materials is prestressed carbon fiber reinforced plastic system. This area has a great potential for use in reinforced concrete structures, most often in pavements: to reinforce overloaded elements, external reinforcement of structures with corroded pre-stressed reinforcement, repair of structural nodes. The article reviews and analyzes the laboratory tests result of reinforced concrete structures (slabs and beams), reinforced with prestressed carbon, as well as non-stressed laminates.
Automation and Processing Test Data with LabVIEW Software
Authors: Korgin Andrey , Ermakov Valentine , Kilani Laith Zeyd 
Published: November 2019

Abstract
This paper presents the usage of LabVIEW software for automation of data acquisition and data post processing during structure testing. Using Labview could accelerate preparation of testing reports especially during performing repeatedly (obtaining statistics). The paper shows automations made during tests of oil tank models and aluminium bridge.
Transformable Steel Dome
Authors: Ibrahimov Alexander , Gnedina Lubov , Popova Natalia , Dolgusheva Vera 
Published: November 2019

Abstract
The developed design of the lattice shell has the ability to fold by reducing its size in one direction and increasing it in another. The principal difference of this design lies in the feasibility of folding the dome as a wholly without the need for a complete disassembly of the shell into numerous elements. The positive side of this design is the possibility of factory production of elements, speeding up the installation process and increasing mobility – the dome can be easily folded and transported to a new place. The below step-by-step description of actions of the general method of constructing the surface of the shell allows you to simulate the frame of a folding reticulate dome. Recommendations for the construction calculation contain a description of the methods used for carrying out calculations manually, bringing the arguments in favor of a computer calculation, instructions on creating a model, setting rigidity and types of finite elements, as well as taking into account nonlinearity when designing the dome in the software package LIRA-CAD. The design of the calculation scheme and the calculation itself are carried out using the general theory of shells. The field of practical implementation of the folding net dome is quite wide – it is the construction industry, defense production, agricultural industry and industry as a whole.
Analytical and Experimental Investigations of Crack width for RC Beams in Bending
Authors: Wlodarczyk Maria , Lutomirska Marta , Duc Duyen Trinh 
Published: November 2019

Abstract
Although cracks do not considerably impair the resistance of reinforced concrete elements, they definitely affect the durability and appearance of structures. The control of crack width and spacing is a convenient approach in engineering practice. The width of a crack is characterized by high variability and the formulas suggested by design codes vary significantly. In the presented paper, the crack widths are derived using analytical methods recommended by several design codes and compared with the results of experimental investigations.
Influence of Solar Radiation Heat Input into Room on Level of Economically-efficient Thermal Protection of Building
Authors: Malyavina Elena , Frolova Anastasia 
Published: November 2019

Abstract
Techniques for choosing an energy and economically feasible thermal protection of buildings in the climatic conditions of Moscow are discussed earlier. An important basis of these techniques is that it was possible to identify the thermal parameters on the basis of which the generalization of the basic energy and economic indicators of the building, depending on its thermal protection, was carried out. The methods were tested for buildings whose working day lasts from 9 am to 6 pm with various internal heat generation. In this case, it was believed that solar radiation is completely obscured. From consideration of the effect of heat gains on energy-efficient thermal protection, it was found that with increasing heat gains, the load on heating systems decreases regardless of the level of heat protection, and the load on the room cooling systems increases more with higher thermal protection than with low thermal protection. However, there are buildings of a number of functional purposes in which solar radiation is partially obscured or not obscured at all. These include some commercial, residential and other buildings. Accounting for heat gains from solar radiation, with variable intensity throughout the year, makes significant adjustments to the choice of the level of thermal protection. This is due to the fact that often cooling of the room is required during periods when the outside air temperature is below the maximum allowable temperature of the room. During these periods, enhanced thermal protection is an obstacle to the natural outflow of heat from the premises. Calculations showed that the higher the heat gain from solar radiation, the smaller the proportion of buildings it is energetically feasible to warm according to the basic standards stipulated in SP 50.13330.2012. And although it is not energetically feasible to carry out thermal insulation for sanitary and hygienic requirements, the conclusions about the benefits of building insulation with reduced heat transfer to the walls and coatings of a building are economically significant. It is also important that when identifying an economically feasible thermal protection of a building, it is necessary to take into account all the components of financial expenses that are affected by the thermal protection of a building. The calculations also showed that an increase in the cost of heat and electricity over time changes the thermal performance of buildings for which this or that thermal protection is economically feasible.
Case Study of GIS Application in Analysing Urban Heating Island Phenomena in Tropical Climate Country
Authors: Le Minh Tuan , Tuyet Cao Thi Anh , Quan Tran Nguyen Anh , Sadriavich Shukurov Ilkhomhon , Phuong Nguyen Thi Khanh , Cuong Le Thi Kim 
Published: November 2019

AbstractThis study indicates Urban Heat Island phenomena (UHI) in districts belonged to Hanoi city located in tropical climate region. The analysis based on assessment’s comparison by applying remote sensing technology. The data captured in partly cloudy days and at night time by satellite Landsat 5, 7, 8 and is converted subsequently into Land Surface Temperature (LST) range maps. Spatial patterns of UHIs in Hanoi city were examined over the daytime and seasonal variations. Gaussian approximation algorithm is used to quantify spatial extents and measure magnitude for each individual UHIs. Consequently, to determine the relationship of UHIs with surface properties, UHI patterns were analyzed in association with urban vegetation covers and surface energy fluxes derived from high-resolution Landsat 5, 7, 8 data. A general picture of UHI phenomena in Hanoi city in this study and analyzed results, by applying integrating satellite high-resolution thermal data with land-surface modelling and meso-scale climatic modelling, to further address the impacts of urbanization in local climate cities, propose a framework for sustainable urban planning design in the future.
Calculation of Transient Temperature Field in an Inhomogeneous Rock Mass with a Spherical Cavity Filled with a Heated Liquid
Authors: Frolova Irina 
Published: November 2019

Abstract
The problem under consideration is determination of temperature fields in a rock mass with a spherical cavity that is partly filled with a heated liquid. At that, the tendency to self-heating of the substance stored in the cavity leads to appearance of high-temperature fields, that in turn results in development of significant thermal stresses. Herewith, real physical and mechanical properties of the rock within the rock mass must be taken into consideration. So, the rock mass material is viewed through the lens of its inhomogeneity, which to a considerable extent is determined by temperature fields for any instant of hot fluid storage. Herewith, the temperature process is transient, but taking into consideration slow redistribution of the thermal field during a long period of time, the problem of its calculation can be considered as a quasi-steady-state problem. Temperature field around the cavity is calculated using an explicit difference scheme.
Geodetic and Microgravity Measurement used in St. Mary’s Assumption Chapel
Authors: Cesnek Tomas , Chromcak Jakub , Izvoltová Jana 
Published: November 2019

Abstract
With an intersection on modern technologies into the sphere of geodesy and geophysics, there increase the number of possibilities of these technologies to be used. There are also ways to make the research and measurements more attractive for general public. There can be not only interest in the way of final results but also from the processing points of view. For example the sizes of historical sites need to be measured but the semi-product of processing can be also 3D model of the object. This product can be used for increasing of object attractiveness or as a base for next research. This is also the direction needed to be selected, to make the science more attractive and interesting for the public.
Influence of Stone Column Length on the Settlement of Soft Clayey Layer
Authors: Znamenskii Vladimir , Sayed Diaaeldin 
Published: November 2019

Abstract
Currently, geotechnical engineers use stone columns to strengthen weak soils. The usage of stone columns to strengthen soft soil has proven successful, increasing their bearing capacity, reducing the settlement and decreasing the consolidation time. The present study was carried out to investigate the impact of the length of stone columns on the behaviour of soft soils and determine the effective length of stone columns, within which they have the greatest impact on the process of settlement of the soft clay layer. The analysis was performed utilizing a three-dimensional limited distinction numerical model FLAC3D. The results of the study confirmed that with the increase in the length of the stone columns, the settlement of the clay layer decreases. This decrease in settlement is significant to a depth corresponding to the relative length of the piles (L/d) = 10, after that the decrease in settlement practically stops.
Improving the Method of Testing Materials for the Heat Shield of the Building
Authors: Lushin Kirill 
Published: November 2019

Abstract
Thermal protection of the walls is an essential factor in ensuring the quality of indoor air and energy conservation in the building. In the course of testing samples of materials for thermal insulation, a number of features were revealed that lead to a decrease in the quality of results and an increase in the cost of resources for testing. Taking into account the experience of the author suggested ways to improve the methodology.
Simulation of Hydraulic Characteristics for Pipelines Consisting of Different Materials and Diameters
Authors: Orlov Vladimir , Zotkin Sergey 
Published: November 2019

Abstract
This paper deals with aspects affecting problems of coming up with a unified method for assessing the hydraulic compatibility of recovered and non-recovered sections of existing pipeline networks subjected to various methods of trenchless repairs. These issues are closely related to the problem of preserving the transporting ability of the wastewater fluid in a non-pressure pipeline during its trenchless renovation with polymer pipes. Theoretical approaches are given to determine the hydraulic parameters in the pipeline system, taking into account the renovation site and sites adjacent to a segment in question located up and down waste liquid fluid. It is shown that the priority measure to maintain the required degree of self-purification of the recovered pipeline section, as well as adjacent areas, is the magnitude of the water flow rate, which allows to provide required transporting capacity of the pipeline system. A formula to determine the length of the velocity destabilization zone is proposed, and the results of calculations using the automated program developed by the authors are put on display where algorithm includes dependencies determining hydraulic pipeline materials friction coefficients on different parameters as well as diameters, pipeline expanses and their slopes. The essence of the calculations, the sequence of input of the initial information using an automated complex, the type of output table information is described. Comparison of the counting results under different design conditions has been carried out. As conclusions, practical recommendations are presented in the way of managerial decisions for the potential achievement of hydraulic balance in a pipeline system and the creation of conditions under which the destabilization zone at the site after repairs is minimized and the number of preventive cleanings of the pipeline network is also reduced to a minimum.
Practical Analysis and Response for Risks Using Monte Carlo Simulation on Construction Manufacturing
Authors: Al-Sahar Forat 
Published: November 2019

Abstract
This paper discussed a real project supporting the management of project risk. The model distinguishes between risks which have to be enhanced and risks which can be mitigated or accepted at some cost so that the customer requirements with respect to project completion time can be satisfied at a minimal cost. The model is based on risk management analysis proses and using a Monte Carlo simulation and in order to discover the probability to closure project within the expected date plan. The model is illustrated by means of a real-world case concerning a part of real state residential project construction located in the Republic of Iraq.
Influence of the Premises Dustiness Degree in an Educational Institution on the Choice of the Appropriate Air Filter Type
Authors: Frolova Anastasia , Belyy Maxim , Bobrovskaya Anastasia 
Published: November 2019

Abstract
Students and teachers spend about 70% of the day in educational institutions. Therefore, recently in the world studies of the effect of air quality on human well-being and human performance have been conducted more often. The high content of suspended particles in the indoor air can lead to the development of allergies, and also serves as a factor of the transmission of respiratory viral infections. The purpose of this study was to determine the degree of dust in the indoor air in the classrooms. For this purpose, the photoelectric method of registration of aerosol particles and the Koch method were used. The results were evaluated according to two requirements for the amount of suspended particles in the air of the educational institution. Depending on the amount of suspended particles and their size, recommendations were given for filters to reduce the dust content of the internal air.
Method of Modifying of Mineral Fillers for Asphalt Concrete by Calcium Polysulfide
Authors: Inozemtcev Sergey , Korolev Evgeniy 
Published: November 2019

Abstract
The method of modifying the surface of grains of mineral filler for asphalt concrete with calcium polysulphides is presented in the paper. Calcium polysulfide solution has been proposed for the expansion of the mineral resource base in the production of asphalt concrete aggregates, which breaks down into elemental sulphur and calcium hydroxide in the course of filler modification. The proposed modifier reduces the temperature coefficient for the bitumen-mineral binder by 1.8 times. The structure of the composite of highly filled mixtures based on modified filler has higher properties compared to mixtures based on classical filler: compressive strength at temperature 0°C – up to 33.5 %; Compressive strength at a temperature of 20 °C – up to 84 %; Compressive strength at a temperature of 50 °C – up to 34.3 %.
Traffic Related Pollutants and Noise Emissions in the Vicinity of Different Types of Urban Crossroads
Authors: Jandacka Dusan , Decky Martin , Durcanska Daniela 
Published: November 2019

AbstractParticulate matter air pollution and noise pollution is a problem of everyday life. Particulate matter (PM) is one of the hazardous pollutants causing deterioration of the environment and thus quality of life of the population. Particulate matter and noise pollution by the road transport is a burning issue, particularly for larger urban areas. Air pollution and noise monitoring was focused on a possible change in the concentrations of pollutants and noise level after the change of the crossroad - three-arm crossroad to the roundabout. The subject of this paper is monitoring particulate matter (PM1, PM2.5, PM10) and noise pollution in the vicinity of crossroads in the urban area and an evaluation of fraction ratios PM10, PM2.5and PM1with regard to construction of crossroad, meteorological conditions and traffic volume. Paper deals with the comparison of the noise emissions objectified by direct measurements of noise levels before and after the reconstruction of the three-arm crossroad to the roundabout and comparison of changes in noise ratios detected by direct measurements and predictive calculations. The roundabout has specific construction and routing traffic, what can influence on production and dispersion of traffic related emissions and noise pollution. The obtained results indicate a decrease in particulate matter concentrations at the roundabout compared to the three-arm crossroad. According to the data obtained and analyzed, the PM10particulate matter concentrations at the roundabout could be reduced by up to 50 % over the three-arm crossroad.
Emission factors of NOx and PM of heavy construction equipment used in toll road project in Indonesia – Case study: Rembang-Pasuruan Toll Section II
Authors: Hajji A M , Yulistyorini A , Yue Huang , Patulak D C 
Published: November 2019

Abstract
Heavy duty diesel (HDD) equipment play an important role in constructing Indonesian infrastructure. This paper proposes a methodology for recording an emission inventory for HDD equipment that formulates emission factors as a baseline of current emissions quantities. The sample case of the proposed emissions inventory technique is based on a small part of Indonesia’s national toll road project: Rembang-Pasuruan toll road project. Rembang-Pasuruan toll road is a part of Gempol-Pasuruan toll road, a piece of national infrastructure project called Trans-Java Toll road that runs from Merak, Northwestern end of Java, to Banyuwangi, the eastern end of the island. This toll road connects almost all major cities and landmarks of the island with the total length of the road is nearly 1,167 km. The length of Gempol-Pasuruan toll road is about 34.15 km, and consists of three section: Section I, Gempol-Rembang 13.9 km, Section II, Rembang-Pasuruan 6.6 km, and Section III, Pasuruan-Grati 13.65 km. This toll road project utilizes a HDD fleet that includes 9 excavators, 2 bulldozers, 2 roller compactors, 1 motor-grader and 1 paver. This equipment consumes large quantities of diesel fuel and release air pollutants, including nitrogen oxides (NOx) and particulate matters (PM). The proposed inventory technique in this paper addresses the key attributes of the equipment on how long it is used during its operational life and how emission rates of NOx and PM are estimated. By using emission factors calculated from equipment’s key attributes, it is revealed that all equipment in the project release approximately 452.12 gr/hr of NOx or 3400.97 gr/day on average, and emit 31.99 gr/hr of PM or equals to 252.92 gr/day.
Forensic assessment on landfills leachate through electrical resistivity imaging at Simpang Renggam in Johor, Malaysia
Authors: Zaini M S I , Ishak M F , Zolkepli M F 
Published: November 2019

Abstract
From years to years, the usage of electrical resistivity imaging (ERI) method dominated by geophysicist has increased tremendously in the application of geotechnical engineering owing to the effectiveness of the method in term of time, cost and also data coverage. The forensic assessment performed with respect to the particular reference to ERI in assessing the landfills leachate at Simpang Renggam, Malaysia. There were two lines of ERI performed at the study area using ABEM Terrameter LS 2 set of equipment based on Schlumberger protocol. Furthermore, the analysis made based on the electrical resistivity anomaly managed to detect the presence of chemical contaminants in the soil with particular reference to the chemicals resistivity values which was associated to low resistivity anomaly. Besides, the heterogeneous of the subsurface material presented in the paper by using integrated ERI analysis enabled forensic assessment of the leachate. The leachate from the landfills was believed to occur owing to the failure of the systems in accommodating and treating the waste which became worst with the present of heavy rainfall. In retrospect, the ERI result was applicable to be adopted in detecting the leachate and thus can assist the authority in taking immediate measure to prevent the frequent water disruptions at the study area.
Shifting cropping shifts by efficient irrigation water to produce maximum rice productivity
Authors: Azis S 
Published: November 2019

Abstract
Agriculture is the main support of the economy in Indonesia so that the sustainability of the productivity of paddy fields must be maintained properly. Rice fields rely heavily on irrigation water supplies from technical rigs. Continuity of water flow must be maintained in accordance with water requirements and cropping patterns in each paddy field. In connection with changes in conditions lately there has been a shift in the rainy season and the dry season which results in erratic discharge of surface water both in quantity and on time so that the use of irrigation water must be done wisely and efficiently to maintain the productivity of the yield of paddy fields. From the results of the implementation of the cropping pattern set by the relevant agency there has been a deviation of 13.81%, which means that it is necessary to improve the implementation of cropping patterns and adjust the time of rain so that rice productivity remains maximal.