bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Multi Rater with Facets on Instruments HOTS of Solution Chemistry based on Tawheed
Authors: Darmana A , Sutiani A , Nasution H A , A Sylvia N.S , Aminah N , Utami T
Published: March 2021

This research is part of the development research in solution chemistry-HOTS-Tawheed. The purpose of this research is to develop of instrument test Higher Order Thinking Skills (HOTS) based on Tawheed on solution chemistry. The stages of the research began by designing 40 multiple choice item with five options. The instrument assessed by five science education experts. Expert judgement analysis of the test item was carried out using the Rasch measurement model approach, facets software. The Multi-rater validation test results showed: (1) The five expert panels considered quality items 23 out of 40 (57.5%); (2) according to the five validators, the instrument items that are most difficult to fulfill from the questions are statements B4, K4, and K8 (logit>+1), while K10 (logit<-4) is the statement item that is easiest to fulfill from the questions; (3) aspect of statistical fit criteria, it can be seen that Val.A and Val.F experts are the most consistent (based on MNSQ and ZSTD); (4) the reliability of the items showed a good level (0.97); and (5) the similarity of assessment by the five experts (exact agreement) which reached 93.0% which shows that there was not much difference between the five experts in assessing all the items.
Utilization of Electrical Energy in Lecture Building at Universitas Bangka Belitung
Authors: Berutu L A , Puriza M Y , Sunanda W , Wijianti E S
Published: March 2021

Electrical energy has become necessary in supporting human life activities, one of which is in higher education institutions. Universitas Bangka Belitung, as one of the public universities in the Province of Bangka Belitung Islands, currently has 12 lecture buildings to provide the best academic services in the 20 available undergraduate programs. Through measurements carried out during lecture activity hours in a few weeks at the main panel in 12 lecture buildings, also obtained the average current, average voltage, and average real power in the R phase, S phase, and T phase. lecture building with sampling data every 15 minutes. Based on measurements, the entire lecture building’s electrical energy consumption is in the range 2-5 kWh with electronic equipment used, including air conditioning, LCD computer projectors, and room lighting
Antidiabetic Activity and Immunostimulant Potential of Bosibosi (Timonius flavescens (Jacq) Baker) Leaves Ethanol Extract in Alloxan-Induced Diabetic Rats
Authors: Lbn Gaol Adriana Y.D. , Ilyas Syafruddin , Hutahaean Salomo , Sipahutar Herbert
Published: March 2021

The number of people with diabetes mellitus (DM) is increasing alarmingly from year to year. Efforts to find cheap, safe and effective natural ingredients for DM are becoming increasingly important. This study was aimed to study the antidiabetic and immunostimulant properties of bosibosi (Timonius flavescens) leaves ethanol extract (LEE) in alloxan-induced diabetic female Wistar rats. Diabetic animals (2 mo, 150-190 g bw) were induced by ip administration of alloxan (175 mg/kg bw) after 24 hrs fasting. Animals were randomly distributed into 4 different groups (5 rats each), group I (normal rats, treated with NaCl), gorup II (diabetic rats, treated with N aCl), group III (diabetic, treated with metformin, 250 mg/kg bw), and group IV (diabetic rats, treated with LEE, 500 mg/kg bw). All ingredients (total volume 1 mL) were administered orally for 14 consecutive days. Blood samples were taken from the ventral tail vein on days 0, 7 and 14 for blood glucose determination. On day 14, rats were fasted (24 hrs), anesthetized and cardiac punctured for blood sample (5 mL) for leucocyte analysis. Blood glucose level of diabetic rats with EED (IV) was significantly lower than diabetic mice without LEE (II) (p <0.05). There was no significant difference in blood glucose level between LEE (IV) and normal (I) and metformin (III) rats. LEE also significantly increased the relative weight of lymph, the number of lymphocyte compared to normal (normal, non-diabetic) animals. Based on the results, it can be concluded that the ethanol extract of bosibosi leaves has antidiabetic activity and immunostimulant properties.
Development of Vibration Sensor Media for Children with Special Needs at The Faculty of Sports Science, Medan State University
Authors: Marpaung Deni Rahman , Sari Rima Mediyana , Nasution Usman , Riza Ade Ros , Nogroho Sinung , Nababan Fitri Winda
Published: March 2021

The purpose of this research is to describe the vibration sensor media as a learning medium for sprint competitions for blind children and to assist teachers and students in learning using vibration sensor media. This research was conducted in several steps, namely: identifying potentials and problems, gathering information, product design, product manufacturing, expert validation, product revision, testing, final production. This vibration sensor media as a learning medium for sprint competitions was first validated by material experts and media experts. Product trials were carried out on blind children in DPD Pertuni Medan with a population of 6 respondents. The small group test was 2 respondents, while the large group test was 6 respondents. This type of data collection used a questionnaire instrument. The results showed that the vibration sensor that has been made for learning sprint competitions was feasible. These results were obtained from the validation results of a) material experts at 92.5% or very feasible; b) media expert of 86.66% or Very feasible; c) small group trial of 92.5% or very feasible; d) large group trial with a result of 95% or very feasible. The vibration sensor media has been declared fit to use as a learning media for vibration sensor media.
Identification Pests and Diseases of the Borneo Black Sweet in Tropical Rainforest
Authors: Widians J A , Puspitasari N , Pakpahan H S , Budiman E , Alameka F
Published: March 2021

The Borneo black sweet Coelogyne Pandurata is one of the mascots of flora in East Kalimantan Tropical Rainforest. This orchid species only grows on the Borneo. The uniqueness of The Borneo black orchid Coelogyne Pandurata, has a black tongue (labellum) with a few green and hairy stripes. This research is to develop an expert system for identifying pests and diseases of black orchids, as a support for the conservation of biodiversity in the East Kalimantan tropical rainforests. The expert system is equipped with a knowledge base in diagnosing pests, symptoms, and diseases of black orchid using Bayes theorem. In this research 4 pests disturbed black orchids, namely bare snail pests, caterpillars pests, grasshoppers pests, and ant pests. The diseases that attacked black orchids were obtained, namely brown spot disease, fusarium wilt disease, soft rot disease, and root rot disease. The result of the calculation of the Bayes Theorem based on 5 symptoms chosen by the user that black orchid has a 40% chance of experiencing root rot disease.
Design and Development of Smart Irrigation and Water Management System for Conventional Farming
Authors: Rafique M A Z M , Tay F S , Then Y L
Published: March 2021

The intention of this project is to develop a smart irrigation and water management system for conventional farming. The project is conducted mainly to improve the irrigation scheduling and also to solve the over watering and under watering issues in traditional irrigation system. These problems can be solved by implementing soil moisture sensor as a smart component in the irrigation system. Smart irrigation system with the implementation of sensory-based system will be able to provide a proper irrigation scheduling, by monitoring the soil and weather condition of the farm. In this project, the sensory system consists of soil moisture sensor, temperature sensor and light intensity sensor, which basically used to monitor soil moisture level, temperature level, and light intensity level at the separate test area. Arduino Mega 2560 microcontroller will process the data from these sensors and a proper irrigation scheduling will be developed based on the data collected. Type of irrigation system that been used in this project is a sprinkler system because it has high uniformity of water distribution to the plant, which able to spread water efficiency and further optimize the water usage during irrigation process. Ultrasonic sensor is also implemented in the system to measure the amount of water used in each irrigation process performed. An offline data storage will be implemented in this project using a micro SD card module, which all the essential information such as sensory system readings and the amount of water used will be recorded and stored into a micro SD card. Thus, it allows user to monitor their farm’s condition, and also gives a better view on what is really happening at their farm.
Automated Classification of Alzheimer’s Disease Based on MRI Image Processing using Convolutional Neural Network (CNN) with AlexNet Architecture
Authors: Fu’adah Y N , Wijayanto I , Pratiwi N K C , Taliningsih F F , Rizal S , Pramudito M A
Published: March 2021

Alzheimer’s disease is a type of brain disease that indicate with memory impairment as the early symptoms. These symptoms occur because the nerve in the brain involved in learning, thinking and memory as cognitive function have been damaged. Alzheimer is one of diseases as the leading cause of death and cannot be cured, but the proper medical treatment can delay the severity of the disease. This study proposes the Convolutional Neural Network (CNN) using AlexNet architecture as a method to develop automated classification system of Alzheimer’s disease. The experiment is conducted using Magnetic Resonance Imaging (MRI) datasets to classify Non-Demented, Very Mild Demented, Mild Demented, and Moderate Demented from 664 MRI datasets. From the experiment, this study achieved 95% of accuracy. The automated Alzheimer’s disease classification can be helpful as assisting tool for medical personnel to diagnose the stage of Alzheimer’s disease so that the appropriate medical treatment can be provided.
A Stunting Prevention Application “Nutrimo” (Nutrition Monitoring)
Authors: Permana A A , Perdana A T , Handayani N , Destriana R
Published: March 2021

A total of 11 % of children under the age of five years (toddlers) in Tangerang City experienced stunting. Stunting reflects chronic malnutrition during the most critical period of growth and development in early life, the first 1000 days of life. Monitoring the nutritional status is able to prevent stunting especially through Kartu Menuju Sehat (KMS) at an integrated service post (posyandu). Most of the data in KMS is recorded manually, so the risk of data loss or damage is very high. Therefore, mobile application that can monitor the nutritional status automatically is needed to develop. The nutrition monitoring application “Nutrimo” which monitors children’s nutritional status was developed based on Android with anthropometric method and the Waterfall system development method. This application was completed with track record feature and suggestions that parents should take about the nutritional recommendations based on their respective nutritional status. The evaluation results showed that Nutrimo application was easy to use, informative and help to prevent stunting.
Development of Automated Monitoring System for Hydroponics Vertical Farming
Authors: Michael G W , Tay F S , Then Y L
Published: March 2021

Proposed is an automated monitoring system for hydroponics vertical farming. This project aims to design and develop an automated system to monitor and maintain the level of nutrition solution for the vertical farming process. The monitoring condition includes Electrical Conductivity (EC), pH value, the liquid level as well as the water temperature of the nutrient solution stored in the rectangular PVC. Instead of using soil as the growing medium, the project used hydroponics method to grow the leafy vegetables, Bok Choy. The data monitored will be sent and processed by Arduino Mega microcontroller and upload to Ubidots Cloud using the ESP8266 NodeMCU. The system also provides control function to maintain the nutrient level and amount of solution flows into each layer of vegetables. It is expected that the implemented system would reduce the water and electrical consumption and allows the growth of the plant to be supervised from time to time without having a person to look after.
Application of the Abel-inversion method for the hard X-ray camera on the HL-2A tokamak
Authors: Zhang J. , Zhang Y. , Li Y. , Gao J. , Yuan G. , Yang J. , Li X. , Song X. , Shi Z. , Liu Y.
Published: March 2021

The hard X-ray camera on the HL-2A tokamak has been used to study the behavior of energetic electrons in fusion plasma. In order to get precise hard X-ray emissivity information from the camera, a new hard X-ray emission profile reconstruction procedure based on the Abel-inversion method has been developed in the present paper. According to the verification results, the accuracy of the Abel-inverted profile depends on the accuracy of the interpolation and fitting processes. However, the error of the Abel-inverted profile is acceptable for the hard X-ray camera in general. For its applications, the procedure has been used to calculate the experimental local hard X-ray emission profiles. The calculation results show that the hard X-ray emission profiles were peaked at the center of the plasma, indicating the main energy of the lower hybrid wave was deposited at the center producing more energetic electrons than elsewhere. In addition, the calculation results can also indicate the confinement quality for energetic electrons, which can also be supported by statistical analyses for the line-integrated HXR emission profiles. The present paper lays a good foundation for the application of the hard X-ray camera on the HL-2A tokamak.
Quaternary alkylammonium disinfectant concentrations in soils rise exponentially after long-term wastewater irrigation
Authors: Heyde Benjamin Justus , Anders Anja , Siebe Christina , Siemens Jan , Mulder Ines
Published: March 2021

Quaternary alkylammonium compounds (QAACs) are used as disinfectants and surfactants worldwide, with their usage currently increasing as a result of the COVID-19 pandemic. QAACs are released into the environment with manure, sewage sludge and wastewater. The fate of QAACs in soils is poorly understood, although QAACs are inflicted in the selection of antibiotic-resistant bacteria. We studied the temporal accumulation of QAACs in soils of the Mezquital Valley that have been irrigated with Mexico City wastewater from 0 to 88 years. Concentrations of 16 QAACs, including alkyltrimethylammonium compounds (ATMACs), dialkyldimethylammonium compounds (DADMACs) and benzylalkyldimethylethylammonium compounds (BACs), were determined using HPLC-MS/MS after ultrasonic extraction. The most abundant QAAC-homologues in the soils were BACs > ATMACs > DADMACs. The concentrations of QAACs increased linearly and slowly during the first years of irrigation (∑QAAC: 2–23 µg kg−1), but after 40 years of wastewater irrigation we observed an exponential increase in QAAC concentrations (up to 155 µg kg−1). QAACs accumulate in soils of the Mezquital Valley during long-term wastewater irrigation. In contrast to pharmaceuticals, no apparent ‘steady state’ concentration is reached after decades of wastewater irrigation.
Three-Dimensional Microscopic Model of Solid Oxide Fuel Cell Anode
Authors: Li Q Q , Li G J
Published: March 2021

In this paper, a three-dimensional microscopic model of the solid oxide fuel cell (SOFC) anode is established based on the SOFC anode microstructure reconstructed by Nano-CT, and the characterization parameters of the electrode are calculated. The electrochemical reaction is defined on the three-phase boundaries of the microstructure, and the polarization characteristic at different temperatures is explored. Results show that the anode polarization loss increase with the increase of temperature. The activation loss and the ohmic loss are of the same magnitude and occupy the main part of the total polarization loss. The pore microstructure directly affects the gas transfer in the anode, and there is a large mass transfer resistance in the small throat, which causes obvious concentration polarization loss and affects the activation loss. Due to the uneven microstructure, the electrochemical reaction rate of the electrodes at the same depth is not consistent. The closer to the electrode-electrolyte interface, the more obvious the unevenness of activation polarization and concentration polarization.
Analysis on aroma components of flowers of five Magnolia denudata cultivars
Authors: Zhang Jianguo , Wu Miaowei , Zhang Mingru , Chen Xifan , Yang Jie
Published: March 2021

Aroma components in fresh flowers fromfive Magnolia denudata Desr are analyzed with Head Space Solid PhaseMicro-extraction (HS-SPME) and Gas Chromatograph-Mass Spectrometer (GC-MS) technology. The results show that 45 compounds are detected in the flowers offive germplasm of genus Magnolia denudata Desr, including 19 alkenes, 5 alcohols, 5 benzenes, 4 ketones, 3 esters, 2 ethers, 1 acid, 5 alkanes and 1 other compound. The type number of volatile organic compounds (VOCs)from more to less in order are: Yulania denudata ‘5#’ (22 species), Yulania denudata ‘Fei Huang’ (21 species), Yulania stellata (15 species), Magnolia liliflora Desr(12 species), Magnolia liliiflora ‘Hong Yuanbao’ (10 species);The content of volatile organic compounds from high to low areYulania stellata (28%), Yulania denudata ‘Fei Huang’ (26%), Magnolia liliflora Desr (17%), Magnolia liliiflora ‘Hong Yuanbao’ (15%) and Yulania denudata ‘5#’(14%). The type and content differences of volatile organic compounds (VOCs) in the flowers offive germplasm of genus Magnolia denudata Desr are comparatively big. There has been no research reports about the contents of volatile organic compounds in the flowers of Yulania stellata, Magnolia liliiflora ‘Hong Yuanbao’ and Yulania denudata ‘5#’. In conclusion, this study is expected to better clarify the component and content of VOCs from the flowers of different Magnolia denudata Desrcultivars, and provide the scientific basis for the health-care type garden green space building.
Effect of CaCl2 on the stability and antimicrobial activity of nisin
Authors: Li Wenchao , Liu Yang , Zhang Qian , Tan Zhilei , Jia Shiru
Published: March 2021

Nisin is a natural and safe biological preservative which has great potential in cosmetics and food industry. However, the low thermostability of nisin at high pH limits its commercial applications. In this study, the effect of CaCl2 on the stability and antimicrobial activity of nisin was studied. The results showed that CaCl2 has a strong protective effect on nisin at weak acid environment (pH of 4.0-6.0) and heat treatment. The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that the crystalline particles of nisin increased size and decreased peak and a stable structure was formed by CaCl2 with nisin. The thermogravimetric analysis (TGA) presented that CaCl2 led to the temperature of initial (T5) and complete decomposition (T95) of nisin increased by 8 °C and 13 °C, respectively, and enhanced the thermostability of nisin. The result of Fourier-transform infrared spectroscopy (FT-IR) confirmed that CaCl2 could promote the formation of hydrogen bonds and increase the stability of proteins. The changes of secondary structure of nisin with CaCl2 was revealed by circular dichroism (CD) spectroscopy. At pH 4.0, the proportion of α-helix, β-sheet and β-turn were same as to that of pH 2.0 without CaCl2. At pH6.0, the proportion of secondary structure changed a little by heat treatment. This indicated that the addition of CaCl2 protected the secondary structure of nisin.
Analysis on the causes of water contaminated by toxic and harmful substances in the Yangtze River Delta
Authors: Yuan Sheng-Yu
Published: March 2021

In recent years, with the rapid development of economy in the Yangtze River Delta, the water pollution are becoming more and more serious. The expansion of urban agglomeration also makes water pollution show significant regional and complex nature. This paper takes water quality of the Yangtze River Delta as an example, the toxic and harmful substances such as ammonia nitrogen, petroleum, volatile phenol and cyanide discharged from waste water were analysed, which has led to increasing attention being paid to the phenomenon of water contaminated by toxic and harmful substances. The causes of water pollution in the Yangtze River Delta are considered to solve the problem of subsequent pollution control. In conclusion, this paper analyzed the causes of water pollution in this area from the angles of geographical environment, legal system, economic development model and so on, and expected to provide the basis for water pollution control.
Study of the characteristics of the synchronization algorithm for a quantum key distribution system based on comparing the number of samples from an adjacent pair of time windows with a threshold level
Authors: Mironov Y K , Mironova P D , Rumyantsev K E
Published: March 2021

The analysis of time and probabilistic characteristics is carried out for a two-stage synchronization algorithm in a quantum key distribution (QKD) system with automatic compensation of polarization distortions. Formulas are obtained for calculating the missing probabilities a signal pair of windows, false alarm and successful synchronization. The dependences of the missing probability a signal pair on the average number of photons and noise pulses are investigated during the analysis of a pair of windows for different threshold levels. The numerical material obtained in the course of the study indicates the possibility of using for express calculations the probability of detecting a signal pair of windows formulas oriented to the normal distribution of the number of recorded pulses at the output of a single-photon avalanche photodiode.
A method for transmitting information based on the stochastic use of binary quasi orthogonal code sequences
Authors: Zhuk A P , Orel D V , Pashintsev V P , Kalmykov I A
Published: March 2021

The objective of the article is to develop the structure of a system for transmitting information with code division of channels and stochastic usage of systems of binary quasiorthogonal code sequences obtained on the basis of functional transformations of pseudo-random arguments, as well as a description of the principle of its functioning. The aim of the article is to develop a method for transmitting information in satellite communication systems and global navigation satellite systems with code division of channels and stochastic usage of binary quasiorthogonal code sequences obtained on the basis of functional transformations of pseudo-random arguments, providing an increase in structural secrecy. The elements of novelty are obtaining a new structure of an information transmission system with code division of channels and increased structural secrecy, as well as a description of the main stages of the information exchange method based on this system. The method differs from the known ones by stochastic use of binary quasi-orthogonal code sequences obtained on the basis of functional transformations of pseudo-random arguments. The main result of the article is that the presented method of information transmission makes it possible to reduce the impact of deliberate imitating interference and cases of substitution of the signals used by increasing the structural (signal) secrecy of the information transmission system with code division multiplexing and stochastic usage of systems of binary quasi-orthogonal code sequences.
Detection of compromising radiation from modern data transfer interfaces using the example of high definition multimedia interface
Authors: Durakovskiy A P , Kessarinskiy L N , Simakhin E A
Published: March 2021

Recently the technical channel of information leakage from electromagnetic emanation more and more interesting for specialists in the field of information security. At the same time, new versions of data transfer interfaces are being developed, that quickly distribute around the world. The use methods to detecting informative frequencies are based on the principles of operation of old data transfer interfaces, consider only the harmonics of the signal, excluding information about its type and interfaces that transmit information to. Accordingly, these methods to detecting informative frequencies of modern data transfer interfaces, such as high definition multimedia interface, do not reflect the completeness and may contain errors, which negatively affects the measurement stage. The article suggests a method to detecting informative signals of compromising emanation from modern data transmission interfaces, such as high definition multimedia interface, using an anechoic chamber, special test program and control program for measuring equipment. The proposed method will be useful both for educational purposes and for beginners in the field of technical information security.
Parallel implementation of algorithm for creating and verifying digital signature based on elliptic curves
Authors: Burtseva P T , Zelenina L I , Khaymina L E , Khaymin E S , Zashikhina I M
Published: March 2021

The article discusses the use of parallel data processing in the implementation in the C ++ programming language using the Visual Studio integrated development environment of an algorithm for information protection and authentication. Data processing is based on the method of discrete logarithm in a group of points of an elliptic curve. The studied case has been developed as Cost Optimization Program for an Oil and Gas Company and includes creating an Optimization Map information system. A part of the system is a module generating and verifying a digital signature. Due to the use of parallel data processing and the ECDSA algorithm for digital signature creation, oil and gas company will be able to increase its working efficiency and information security.
Methods for Modeling Sociopolitical Processes to Address Issues of Integrated Security in Caspian Region
Authors: Markelov K A , Azhmukhamedov I M , Yu Kuznetsova V
Published: March 2021

The article dwells on the issue of ensuring integrated security in the Caspian region. It was noted that this region, due to its geographical location, is strategically important for the implementation of Russia’s internal and foreign policy, so any changes in it should be carefully thought over and analyzed for possible consequences. To address the issues of ensuring integrated security, the authors considered the main methods for modeling social and political processes that can be applied to simulate the consequences of specific managerial decisions in the Caspian region.
Algorithm for predicting the health of an information system after exposure to cyberattacks
Authors: Dushkin A V , Kochedykov S S
Published: March 2021

The presented work proposes a systematic approach to the development of software for cyberattack detection systems and predicting the health of the information system. A formalized descriptive model of an intrusion detection system is presented. A complex of models is described that allow making diagnostic decisions about the state of software performance.
On the using Datamessage as evidence of Cybercrime
Authors: Zharova A , Elin V
Published: March 2021

The article reveals a number of features of using computer data in cybercrime cases. The contradictions between the European and Russian approaches to the question of the equivalence of an electronic document and a paper document are considered. The authors reflect the problem of using an electronic document as evidence in criminal cases in compliance with the principle of admissibility of evidence in the fight against cybercrime. The paper concludes that there is a need for comprehensive legal and technical regulation of the field of IT relations.
Software model for the synthesis of increased volumes of systems of discrete orthogonal code sequences
Authors: Studenikin A V , Zhuk A P
Published: March 2021

To ensure high structural secrecy of information transmission systems with MA and CDM, it is necessary to use many ensembles of stochastic discrete orthogonal code sequences differing from each other. The purpose of the article is to develop a program for studying the correlation and statistical characteristics of ensembles of stochastic discrete orthogonal sequences described by the eigenvectors of symmetric matrices, with random filling of the diagonal coefficients. Assessment of the statistical and correlation indicators of sequence ensembles obtained on the basis of the developed program showed their random nature.
Development of an algorithm for abnormal human behavior detection in intelligent video surveillance system
Authors: Zh Satybaldina D , Glazyrina N S , Kalymova K A , Stepanov V S
Published: March 2021

The aim of the work is to develop algorithms for analyzing video data in real time based on computer vision methods, as well as deep learning technologies for artificial neural networks for abnormal human behavior recognition near critical facilities using ATMs as an example. The article provides an overview of the initial research aimed at the choice of data capture devices, neural network architecture, software implementation and selection of experimental conditions (distance and illumination). Static and dynamic hand gestures were used as object’s movements. Experimental results show that using the Intel RealSense D435 Depth Camera provides more accurate dynamic gesture recognition under different experimental conditions.
Architectural and Technological Dialogue: Development of “New City” Generation
Authors: Shershneva E G
Published: March 2021

The article considers urban concepts of new generation cities based on comparison of their architectural and technological features. Analysis of approaches to the design of modern urban areas allowed to determine the dominant principles of urban planning as a synergy of “Creative + Comfort + Smart + Green”. In this context, the author identifies a group of futuristic cities whose projects are based on the synthesis of technological and architectural innovations and eco-friendliness. The definition “neo-city” is introduced and examples are given that are already being built. Population density, lack of territories and environmental problems are reasons for foundation of neo-cities in South-Eastern countries. It is noted that neo-cities are represented in concepts “city without cars”, “city without cars and skyscrapers”, “energy-saving”, “garbage-free” and “high-tech city”. Architectural appearance of each city has its own innovation. Using of bionics principles in architecture of cities is aimed at creating a comfortable environment. Neo-cities are quite ambitious projects in terms of design and financial and technical characteristics. Risk of their operating is technical failures due to the concentration of technical devices and sensors. It is actualized, that the attractiveness of such cities is determined by a comfortable social infrastructure and effective urban management.
Friendliness of the City to Children and Young People (Based on Expert Interviews)
Authors: Filipova A G , Vysockaya A V
Published: March 2021

All Three approaches to understanding the friendliness of the urban environment (urban, socio-psychological and managerial) are illustrated in the article with materials from expert interviews. The experts were specialists involved in the organization of recreation and leisure of children and youth in the city; urban planning, architecture and urban design; maintaining the health of children and young people and ensuring safety in the city, including road safety. Attempts have been made to highlight indicators of urban environment friendliness to citizens from the standpoint of the three aforementioned approaches, as well as possible directions for the transformation of the city towards its friendliness both.
Safety Management of Operated Buildings
Authors: Ishkov A N , Vorob’eva Y A , Burak E E
Published: March 2021

The article outlines the basic principles of the safety management system for buildings and structures, the basis of which is monitoring the technical condition of building structures. The questions of ensuring the structural safety of buildings and people inside are considered. It is proposed as a solution to the problem of timely prevention of accidents and catastrophes of building structures to develop a unified system for managing the safety of buildings and structures and methods for predicting their service life. The solution of a system of equations expressing the state of structural elements of a building or structure separately is given. The advantages and disadvantages of existing methods for predicting the technical condition of each group of structural elements are examined: statistical, deterministic, physical-statistical (combined) and expert.
Housing Construction and Purchase Through the Model of Social Financing
Authors: Acri E P , Vorontsova N V , Egorova I P
Published: March 2021

The article considers aspects of solving the housing problem by improving the mortgage system. The authors analyze the existing system of construction financing, project finance introduction and its results, and study in detail certain elements of mortgage lending. On this basis they further introduce a model of social financing for housing construction and purchase. Management of regional housing construction in the framework of investment and construction activities is a challenging task. This task is being solved gradually and is expressed by standard management functions. Reliability in relations with investors and quality of management of the investment construction process are directly dependent on the quality of implementation of the management functions mentioned above. Investment projects are aimed at achieving specific goals in housing construction, as well as any complex socio-economic systems. In the field of housing construction, not only the return of investments and resources but also investments budget effectiveness and their social aspect are important from the point of view of the region’s development. Therefore, the formation of management system of investment and construction activities in general, depends on coordination of separate elements of the system in the process of the housing complex operation.
Efficient Asphalt Concrete Mix Compaction Modes by Vibrating Road Rollers
Authors: Shishkin E A
Published: March 2021

The paper considers the asphalt concrete mix compaction process. The behavior of the material being compacted under load is described using the Kelvin-Voigt rheological model consisting of elastic and viscous elements. The interaction process of a vibratory roller with an asphalt concrete mixture is modeled using a single-mass oscillatory system. The model input parameters are the characteristics of the material being compacted and the vibrating equipment. The output parameters are the parameters of the roller vertical movement. As a simulation result, the temperature limits of the different rollers types efficiency are obtained. Also, rational vibration exciter frequency ranges were obtained for different types of rollers.
Study of the Local and Imported Rubber Products Made from Fluoroelastomer
Authors: Romanova N V , Shafigullin L N , Buyatova S G
Published: March 2021

The paper provides the results of the studies of the domestic and imported fluoroelastomer O-rings for cylinders with antifreeze cooling. It revealed that the imported materials were more efficient as they featured better compressive strain properties since they provided the acceptable sealing ability when subjected to antifreezes at elevated temperatures, as compared to the domestic materials. The different properties are explained by significantly different filler components and fluoroelastomer chemistry. The comparative analysis showed that the domestic O-rings had a higher compression set both in the coolant medium and in air. The high compression set and subsequent loss of the sealing effect can be caused by low quality of the rubber and inadequate formulation of the rubber mixture.
Critical Analysis of Activities on Removal of Icicles and Ice from Roofs of Buildings and Possibility of Prevention of their Formation
Authors: Ufimtseva E , Podoprigora Yu , Danilova M
Published: March 2021

The article analyzes consequences associated with inefficient removal and prevention of icicles and ice on roofs of buildings and suggests development of systems and devices to minimize these consequences. An inert solution to the problem of removing and preventing icicles and ice on roofs of buildings creates a bulk of other interrelated problems, most important of which is the threat to and reduction of the quality of people’s life. The internal development potential of the Russian Federation in the field of removal and prevention of icicles and ice from roofs of buildings is the key to reliable development of housing and utilities sector.
Connecting a Skyscraper to Urban Space: a Stylobates Typology for Tall Buildings
Authors: Generalova E , Generalov V
Published: March 2021

The study reveals the following aspects that determine the typological diversity of stylobates in high-rise buildings: functional structure; connection to pedestrian and traffic flows; landscaping; variation of scenarios of social interaction; adaptability; the degree of accessibility of various public services; security; the impact of climatic conditions on the planning structure; innovative architectural, constructive and technological solutions. A scientifically based typology of stylobates of high-rise buildings is proposed. The article focuses on the transit-oriented development of the stylobate part of high-rise buildings and complexes. The main space-planning elements necessary for organizing pedestrian traffic are identified.
Simulation of Snow Mass Movement on the Roof of Cylindrical Shells
Authors: Siyanov A
Published: March 2021

A simulation was performed and a method was developed for determining the kinematic and dynamic characteristics of the elements of a mobile snow mass at the stage of their movement on the surface and at the moment of separation from the roof of cylindrical mesh coverings. The developed method allows us to determine the pressure of the snow mass on the shell, calculate the acceleration of the snow elements of the array at the time of sliding off the roof and calculate the time of separation of snow elements from the surface of the shell. It is possible to calculate the speed and value of the angle at which an element of the snow mass is separated from the roof and falls along a ballistic curve.
The New Purposes of Destroyment Mechanics of Dissimilar Bodies
Authors: Gumerov A K , Mastobayev B N , Valeev A R
Published: March 2021

Recently, with the rapid development of fracture mechanics, the range of tasks that it allows to solve is also expanding. The article provides a brief overview of problems with singular stress fields starting from a simple fissure and up to V-shaped elements made of dissimilar materials. It shows that the fissure is a special case of an entire class of problems. The destruction of pipelines, as well as all other structures, occurs through the birth and development of fissures. It means that it is more important to study problems with singular stress fields in the oil and gas industry. The article provides a solution to a general problem from which all known solutions follow in particular cases. But if in the case of a fissure the dimension of all stress intensity coefficients is the same and constant, then in general the dimensions of the KIN are determined by the values of a parameter that depends on the elastic properties of materials, as well as on the crack opening angle. This property of KIN, causes difficulties with calculating of strength. Therefore there is a problem - how to determine the strength conditions of structural elements with such singular points. This problem requires further research in this area.
Features of the Architecture of the Consular Buildings of the Great Britain and Their Manifestation in Manchuria at the Beginning of the 20th Century
Authors: Smolianinova T A , Tceluiko D S
Published: March 2021

The article discusses the architecture features of the consular buildings of Great Britain on the territory of Manchuria in China during the first half of the 20th century. The historical background of the appearance of consular posts is analyzed. The space-planning and functional features of the objects and their characteristic features and techniques are revealed. A special role in the planning decision was played by an unshakable requirement in the creation of separate blocks delimiting personnel zones, receiving visitors to the institution and the living space of the consul. At the same time, more attention was paid to the planning structure of the consular house than to architecture. The stylistics of the objects is close to eclecticism, and the motifs trace the features of the Georgian style.
Comprehensive Restoration of the Workable Technical Condition of Expanded Clay Concrete Panels of Industrial Buildings with Moral and Physical Wear
Authors: Dubrakov S V , Dubrakova K O , Masalov A V
Published: March 2021

All articles must contain an abstract. The abstract text should be formatted using 10 point Times or Times New Roman and indented 25 mm from the left margin. Leave 10 mm space after the abstract before you begin the main text of your article, starting on the same page as the abstract. The abstract should give readers concise information about the content of the article and indicate the main results obtained and conclusions drawn. The abstract is not part of the text and should be complete in itself; no table numbers, figure numbers, references or displayed mathematical expressions should be included. It should be suitable for direct inclusion in abstracting services and should not normally exceed 200 words in a single paragraph. Since contemporary information-retrieval systems rely heavily on the content of titles and abstracts to identify relevant articles in literature searches, great care should be taken in constructing both Purpose of research is determining the category of technical condition of building structures to assess the residual resource of industrial facilities and urban infrastructure. Development of a technical solution to the problem of a restoration of a workable technical condition of building envelopes, including the provision of mechanical and heat engineering requirements. During the engineering survey of the building located at Kursk region, significant defects and damages affecting the technical condition of the building envelope were revealed. According to the results of studies, some flaws were identified that need to be eliminated. The ways of solving the identified problems and defects associated with the building envelope are given and described to restore the building to its proper condition. During surveys of building structures, it is necessary to pay attention not only to strengthening building structures, but also to restoring the thermal characteristics of building envelopes and bringing them in conformity with the requirements of current regulatory documents. To accomplish this task, a reinforcement design has been developed that creates the necessary reinforcement and brings the thermal characteristics of the building envelope in accordance with modern requirements to ensure the necessary energy efficiency of the building envelope.
Recreational Potential, Long-Term Planning and Spatial Organization of the Climatic-Balneological Resort in the Area of the Tersinsky Mineral Water Deposit
Authors: Ershova D V , Matehina O V
Published: March 2021

The work carried out a comprehensive analysis of the historical conditions of the formation and development of architecture and the territorial organization of climatic-balneological and ski resorts with a periodization of the stages of development. The role of the regularities of the landscape as a means of forming the spatial environment of the resort is determined in relation to the climatic conditions of the Kemerovo region. The resource potential of the territories was assessed. The main components of landscape design are determined and the principles of the spatial organization of tourist complexes by means of the laws of the natural environment are formulated for the conditions of the West Siberian region. The methods of forming the architectural and artistic image of resort buildings by means of subordination to its landscape components are systematized. An experimental design development was carried out for the long-term planning of resort areas and the zoning of recreation of the Tersinskoye mineral water deposit. The design development of the master plan of the central part of the balneological resort is presented, its general architectural and stylistic concept is determined. The project proposal of a spa resort hotel has been completed.
Classification of Impulse Rotators with Kinematic Excitation of Oscillations
Authors: Antipina E S , Zhilin S N , Kukinova G V
Published: March 2021

The kinematic torsional vibration exciters ensure that the material to be processed is required in the specified parameters. The structure of the Assur groups involved successive manufacture and testing of a device for practical assessment of motion possibilities, nature of change in process forces, structural reliability and maximum useful application of the supplied energy for destruction of the processed material. Analysis of operation results of laboratory and industrial samples showed their advantage in comparison with existing drives due to expansion of application field, reduction of specific energy consumption of a production unit, quality improvement of technological processes and operation time. The varied influence of torsional oscillations on properties variety of the processed materials has led to the development of an impulse rotators (IR) class of required technical characteristics. In order to increase rotators consistency parameters with materials properties, individual property IR designs are currently being developed.
Modeling of Variable Operating Modes of Water-to-Water Heat Exchangers
Authors: Rafalskaya T A
Published: March 2021

Heat exchangers used in heat supply systems operate in conditions of variable flow rates and temperatures of heat carriers. Existing theories for calculating variable modes of heat exchangers are based on the use of dimensionless constant parameters, regardless of their mode of operation. The use of such theories with a large change in temperature or flow rates of heat carriers in the heat exchanger leads to a significant error. Modeling of various variable operating modes of a counter-flow water-to-water heat exchanger with a change in its heat capacity allowed us to establish patterns of change in the parameters of heat exchangers and to construct a technique available for engineering calculations. This task becomes especially relevant when upon transition to new methods of central and local regulation of heat supply systems. Verification of the developed method was carried out on a heat exchanger model in the ANSYS Fluent package. This method is quite accurate; however, it requires the construction of a calculation model and takes a very long time, which does not allow it to be used for operational control of the operation modes of heat supply systems. Comparison of the calculation results showed a rather high accuracy of the developed methodology for different operating modes of heat ex-changers.