bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of images from UAV to create cadastral map in Mekong Delta (VietNam)
Authors: Anh Tai Nguyen , Huu Si Dao , The Thiem Nguyen 
Published: July 2020

Abstract
Research topic: “Application of images from UAV (Unmanned Aerial Vehicle) to create a 1: 2000 cadastral map in Hoa Khanh Tay commune - Duc Hoa district - Long An province”. The project was conducted in Hoa Khanh Tay commune, Duc Hoa district, Long An province from August 2017 to December 2018 with the goal of testing the establishment of 1: 2000 cadastral map from UAV images, with Trimble UX5 HP aircraft and SONY a7R camera; The purpose of the paper is to assess the accuracy when using digital images taken from UAV to create large scale cadastral maps for state management of land. The project carried out through steps: designing flight imagegraphy, measuring grid control coordinates by static GPS technology, processing images, digitizing, drawing pictures, surveying information and additional measurements by total stationary method in the field, editing and perfecting the cadastral map according to current regulations. Based on the results of the project: evaluation of the accuracy and applicability of UAV images in mapping.
Green Spice for the Megacity and Urbanization
Authors: Zaykova Elena 
Published: July 2020

Abstract
The project novelty of the world’s urban development trends is associated with new approaches to the organization of the modern human life environment. Issues of integrated development of territories with the organization of different types of public spaces in the natural environment are solved at different urban planning levels. Residential and office clusters with new forms of socio-cultural and recreational scenarios represent a modern design in which objects do not have visible borders between nature, architecture and the human environment. This is a new type of hybridization of a building with an environment where nature and technology, education and entertainment, history and modernity combine and complement each other. On the other hand, increasing risks on the planet from floods, hurricanes, fires and droughts force specialists to adapt to these changes and learn how to control them through new design technologies. Therefore, the emergence of “hybrid objects, blocks and spaces” is not accidental and is associated with a change in perceptions about the level of environmental sustainability and comfort of living for people of different ages and social status in large cities. Depending on the social order and location in different parts of the city, hybrid facilities have a strong impact on environmental change when using green building technologies and offer citizens a variety of activities in a harmonized environment. They have a powerful scientific resource in working on the aesthetics and ecology of the city, as their typological structure affects the indicators of environmental sustainability by forming a new green and blue infrastructure of the city. Due to the high interest of specialists, hybrid objects and spaces deserve careful study, as they affect not only the quality of the urban environment when using the tools and technologies of architecture, landscape and design, but also the issues of urban management and climate change in the near future.
Indoor Air Quality and Thermal Comfort: An investigation in office buildings in Hanoi, Danang and Ho Chi Minh City
Authors: Thi Hai Ha Pham , Thi Khanh Phuong Nguyen , Thanh Trung Nguyen , Loi To Thi 
Published: July 2020

Abstract
Thermal comfort and air quality are basic factors of indoor environment. In office buildings, poor indoor air quality (IAQ) and low thermal comfort level may negatively affect occupants’ health and performance and eventually causes Sick Building Syndrome (SBS). In this research, the IAQ and thermal comfort were examined at a number of office buildings in the three Vietnamese cities of Hanoi (North), Danang (Central) and Ho Chi Minh City (South), which aims to assess the quality of indoor environment of office buildings in Vietnam. The results showed that the design and operation scheme play an important role for the achievement of the indoor air quality and thermal comfort. The collected data from field measurement and survey are expected to be concrete scientific basis for the revision of current standards and development of new standards in air quality of office buildings
Combined system development of heat ventilation air condition temperature control by fuzzy logic controller
Authors: Surin Vladislav , Troyanovsky Yan , Maskaev Dmitry , Tarasenko Ilya , Boldin Mikhail 
Published: July 2020

Abstract
This paper presents the development of combined model, which describes the temperature control process of an automated heat ventilation air condition system based on fuzzy logic algorithms and methods. This model solves the problem of hydraulic systems excessive inertia, what directly affects the quality of regulation. The operation principle of the system and its advantages, which consist in obtaining high-quality transients for the parameters of static error and transient process time, are presented. Proposed control principle allows to increase the system performance improving the quality of temperature parameters regulation. Model was developed in Matlab Simulink using FuzzyLogicToolbox.
Methods for evaluating the effectiveness of the object management system
Authors: Chelyshkov Pavel , Khripko Tatiana 
Published: July 2020

Abstract
Evaluation of the effectiveness of systems lifecycle management the object of capital construction (further – Department) is a mechanism that allows objectively to determine the attainability of the goals and objectives of the project (hereinafter – project) as a whole and each of its stages, the efficiency of the organization and implementation of the project in the context of the rational use of resources. In accordance with the life cycle of a capital construction object is the period during which engineering surveys, design, construction (including conservation), operation (including current and major repairs), reconstruction, and demolition of a capital construction object are carried out. Performance assessment is an important element in the development of project and planning decisions that allows you to determine the level of development and progressiveness of the current management structure, projects being developed, and is carried out in order to select the most rational version of the management structure or how to improve it using the selected evaluation criteria. The set of performance evaluation parameters used for solving a specific task is determined based on the project specifics and the required technical and economic indicators. Methods of multivariate statistical analysis and multi-criteria evaluation were considered to assess the effectiveness of management systems. The essential point is the presence of a range of common parameters. This research can be used in the development of information systems in construction, as well as in investment and construction organizations to audit the quality of the management system and its segments.
Attractiveness and Livability in New Urban Areas of Hanoi: When Their Public Spaces Are ‘Socialized’
Authors: Tran M T , Chu N H , Phan T H , Nguyen T H , Pham T M L 
Published: July 2020

Abstract
After 1986, by economic reform institution and the end of State subsidization in housing development, the model of KDTMs (Khu Do Thi Moi - new urban area) is the result of transferring the housing supply part to the private sector, referred to as ‘socialization’, which has come to imply the individualization of responsibilities and the privatization of public goods. This model has shown a marked change in the ideology of creating neighborhood-level public spaces, in order to increase the attractiveness and competition in the real estate market. Perhaps this transfer is justified in the context of restricting the government’s public funding to establish and maintain urban public spaces as well as the real need to create the attractiveness and livability of the KDTM project. Public spaces in KDTMs bear the additional economic role, creating a trinary political-economic-social system. The KDTM project owner has the role of promoting the creation of the public space system but has also given additional forms of ownership and management. The use of public spaces is divided into different levels bringing many identity creative imprints according to the context of each project. The process of socializing public spaces in KDTMs redefined the nature of public spaces in Vietnam’s urban residential areas.
Water-resistant gypsum expanded-clay concrete technology
Authors: Panchenko Alexander , Kharchenko Igor 
Published: July 2020

Abstract
The results of studies on the technology of preparation and hardening of the expanded-clay concrete under various conditions, prepared on the basis of a water-resistance complex gypsum binder (CGB), are presented. It is shown that CGB-based expanded-clay concrete can be used to erect the outer walls of residential and civil buildings. The optimal preparation methods and temperature and humidity conditions for hardening water-resistance CGB-based expanded-clay concrete are given.
Dynamics of hydraulic resistance in the zone of constraint of the riverbed
Authors: Maalem Nureddin , Begmatov Ilkhom , Khasanov Khojiakbar , Kahharov Uktam , Khidirov Sanat 
Published: July 2020

Abstract
The article is devoted to the analysis of the dynamics of the morphometric parameters of the river channel and the hydraulic parameters of the flow under constrained conditions. The Kipchak hydraulic track located in the lower reaches of the Amu Darya River, constrained by the pontoon bridge, is characterized by intensive channel processes. The dynamics of the hydraulic resistance of the channel depending on the flow during the periods of observation in a confined section of the river has a wide range of 0.045 to 0.068, with a change in the roughness of the channel within 0.0195 to 0.065. The calculated values of the flow rates, taking into account the inhibitory effect of the river banks, gave a satisfactory agreement with the measured ones, the hydraulic resistance of the channel, depending on the value of this parameter, varied within 0.045 to 0.068 with the dynamics of the Chezy coefficient from 27 to 67 m0.5 / s
Using Solar Energy for Autonomous Water Supply to Communities
Authors: Mironov Victor , Ivanyushin Yuriy , Zhernakov Evgeniy , Aksenov Boris , Mironov Dmitriy 
Published: July 2020

Abstract
Global water consumption grow steadily. In regions with a shortage of fresh water, its production is accompanied by a significant expenditure of energy, as a rule, it is a burning of hydrocarbon fuels. This factor has a negative impact on the environment. The aim of this work is to develop an energy-efficient “green” technology for the desalination of seawater and the production of fresh water from contaminated sources, through its forced evaporation with subsequent condensation of moisture. The process of obtaining fresh water is due to pre-saturated air in a closed thermodynamic cycle. The paper presents the thermal balance of modular installations. To increase the insolation power per unit area, it is possible to use various centers of solar energy. Experimental studies and a comparison of the performance of two variants of desalination plants in water with each other and with theoretically possible productivity were carried out. The productivity of the technologies is sufficient for the autonomous supply of drinking water to individual settlements and for the cultivation of plant foods by the hydroponic method.
Some aspects of ecological assessment of urbanized territories
Authors: Akanov Alexander , Belov Vyasheslav , Martianova Ekaterina 
Published: July 2020

Abstract
At the moment, the concept of safe handling of household waste, including its processing is being implemented all over the world. However, there is no assessment of the development of urban areas with high population density in terms of household waste disposal. Regulatory information is outdated, and integrated development does not consider possible measures to reduce waste generation and waste disposal management. Information about the actual volume of waste generated for certain areas of complex development in Moscow is provided. The relationship between technical signals and integrated education and the actual volume of waste generation. The data on the assessment of complex structures for urban areas with a high population density are presented.
Numerical and experimental assessment of frequencies and amplitudes when swirling excitation of bending vibrations of construction structures
Authors: Ageev Nikita , Poddaeva Olga , Fedosova Anastasia , Egorychev Oleg 
Published: July 2020

Abstract
In the paper a numerical simulation of the unsteady flow around a quasi-two-dimensional stationary model based on RANS methods that are closed by the SST turbulence model was performed. After that, the amplitudes and frequencies of the aerodynamic forces were estimated, then the speed of the appearance of the resonance of the structure was searched and the amplitudes were calculated. A comparison is made with the data of experimental modeling. To eliminate the contradiction between the experimental data and the results of numerical modeling using RANS methods, oscillations were also considered within the framework of the vortex-resolving approaches LES and DES. It is shown that the technique of modeling a quasi-two-dimensional compartment allows one to quickly obtain a result that qualitatively and in order of magnitude corresponds to experimental data, but cannot provide a quantitative result. To ensure quantitative estimates, it is necessary to carry out physical modeling in wind tunnels or design studies with high spatial and temporal resolution based on modern eddy-resolving methods of computational aerodynamics.
Anchorage strength and ductility at various loading conditions
Authors: Shuvalov Aleksandr , Gorbunov Igor , Kovalev Mikhail 
Published: July 2020

Abstract
Article shows results of anchor pullout tests for two types of anchors: bent foundation anchor bolt and torque-controlled undercut anchor. Effective embedment depth is determined during research for bent anchors 16, 24 and 36 mm in diameter. Tests were carried out for 37 specimens with different embedment depth in a range from 150 to 650 mm. Load-displacement diagrams for static and cyclic dynamic pullout tests in uncracked and cracked concrete were acquired. Cyclic loading pattern simulated seismic loads. Test results for undercut anchors with diameter of 12, 16 and 20 mm and embedment depth of 125, 190 and 250 mm respectively allowed to estimate the influence of cracks in concrete and cyclic loads on ductility of anchor during pullout tests. It is stated that embedment depth required by regulatory documents for bent anchor bolt is higher than admissible embedment depth acquired in tests as a result of comparative analysis of design and optimal anchor bolt structure.
Analysis and Selection of Creep Models for Concrete Structures in Tropical Regions
Authors: Nguyen Trong-Ha , Tran Ngoc-Long , Phan Van-Phuc 
Published: July 2020

Abstract
There are a number of models for predicting concrete creep behaviour such as models proposed in RILEM - B3, EN 19921-1-:2004, SABS 0100-1; MC -10… The existence of these different models for concrete creep analysis is resulted from the dependence of creep characteristics on many factors, including internal factors and external factors. Each model is therefore suitable for a specific condition. This study aims to analyse the creep models of concrete given in some concrete standards. Characteristics and scope of application of each model were clarified. These models were then applied to calculate concrete creep based experimental results on long-term deformation of reinforced concrete column sample in Viet Nam. A method of determining concrete creep coefficients was also established in this study. Compare the concrete creep coefficient calculated from the above methods and the results of the experiment to select the expected model. The results show that models ACI 209-2008 and EN 1992-2004 were the most suitable ones for applying in Vietnamese conditions. We recommend using these models for creep analysis of concrete in Viet Nam and in tropical climate.
Experimental Studies of Steel Beams Reinforced with Carbon Plastic Composites
Authors: Shchurov Evgeniy , Tusnin Alexander 
Published: July 2020

Abstract
When reinforcing metal structures, an increase of bearing capacity is achieved due to inclusion in operation which assume part of the current load. Most often, such an element is a rolling corner, channel, pipe, or steel strip. As an alternative, carbon fiber composite elements may be used for reinforcement. In this case the reinforcement element is best performed from a carbon fiber lamel. Lamel can be used as reinforcement of steel structures working both for tension and bending. When reinforcing the bending elements, the carbon fiber lamel is glued to the stretched side of the beam. The article presents the test results of beams reinforced with carbon fiber. Experimental samples are made of square steel pipes with a section of 50x3 mm, length of 1000 mm. Reinforcement is performed by carbon fiber lamel with section of 25x1.2 mm, which is glued with two-component glue. The choice of parameters of the investigated construction is due to the characteristics of the test equipment. Samples cut from the steel pipe were pre-tested to determine the mechanical characteristics of the steel. Also, the properties of the carbon fiber lamel were clarified by the tests of the samples. When evaluating the experimental load, were used the previously obtained data on the lamel inclusion in the work before the exhaustion of the strength of the adhesive layer. Method of carrying out tests of reinforced beam is presented, test installation, used equipment and step-by-step progress of experiment is described. Analysis of the experimental data showed a significant effect of the gain on the bearing capacity of the beam. It has been found that due to reinforcement of carbon fiber, beam strength increases in comparison with elastic stage of operation by 9-17%.
Using nondestructive methods for determination types of rebar splices
Authors: Korgin Andrey , Ermakov Valentin , Zeyd Kilani L.Z. 
Published: July 2020

Abstract
The article considers the types of rebar splices in reinforced concrete building structures. Examples of couplers and lap splices of reinforcing bars with a diameter of 20 mm are given. The main task of the work is to analyze the results of tomographic studies of various concreted splices. The studies were performed using the MIRA A1040 low-frequency ultrasound tomograph. Conclusions about the possibility of using the ultrasonic method to determine the types of splices were made.
To the theory of bending and oscillations of three-layered plates with a compressible filler
Authors: Usarov Makhamatali , Salokhiddinov Abdulkhakim , Usarov D M , Khazratkulov Islomjon , Dremova Nadejda 
Published: July 2020

Abstract
The paper is devoted to improving the theory of bending and vibrations of three-layer plates with transverse compressible filler and thin outer bearing layers. For the outer layers, the Kirchhoff-Love hypothesis is accepted and the motion of their points is described by the equations of the theory of thin plates relative to forces and moments. Unlikebearinglayers, a filler is considered as a three-dimensional body that does not obey any simplifying hypotheses. The equations of the bimoment theory of thick plates with respect to forces, moments and bimoments, created in the framework of the three-dimensional theory of elasticity, taking into account the nonlinearity of the distribution law of displacements and stresses over the thickness, are taken as the equations of motion of the filler. Expressions of forces, moments, and bimoments in the layers, as well as boundary conditions at the edges of a three-layer plate with respect to force factors are given. In the conjugate zones of the layers, the complete contact conditions for the continuity of displacements and stresses are set. An example is considered and numerical results are obtained.
On the probability determination of the reliability of a technosphere object under hazardous influence
Authors: Gvozdev Evgeny 
Published: July 2020

Abstract
The use of various criteria characteristics included in the content of deterministic, statistical and probabilistic approaches is shown in this article for determination the indicators of safe permissible conditions of buildings (structures). A feature of assessing the reliability of buildings (structures) for their operation under additional loads (explosions, fires, vibration processes) is the determination of an indicator of a given safety margin and its stability under possible realized effects. The aim of the study is to develop an approach to determine the reliability indicator of a building (structure), for operation in conditions of additional loads. The subject of the study is the process associated with the determination of the reliability indicator of buildings (structures), for their further operation in the technological process, causing effects in the form of additional loads (explosions, fires, vibration processes). The solution to such problems is relevant for buildings (structures) that are acquired (leased) by the owner, for their further operation in the production process, in the technology of which fire and explosion hazardous substances (materials) are handled, stored or processed. To solve the tasks, it is proposed to use a simplified assessment of the safety margin of a building (structure) by yield strengths (for steel elements) and strength (for base materials, load-bearing walls, partitions and ceilings) corresponding to the maximum allowable values for their destruction. The article provides a consistent theoretical description of the formulas, which allows us to establish a relationship between the safety margin of a building (structure) and the probability of its destruction during realized impacts. An innovative approach is described that allows us to solve the problems of assessing the strength reliability of structural elements of buildings (structures), when it is important to be able to obtain guaranteed characteristics of a given safety factor, its resistance to possible realized impacts - explosions, fires, vibration processes. The use of the material, in order to determine reliability indicators based on risks, allows us to consider the calculated values of the safety margin of a building (structure), which meets the established requirements for evaluating effectiveness from the point of view of theory and practice of operations research.