bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cement Composition Materials Based on Electrochemically and Electromagnetic-activated Filling Water
Authors: Erofeev V T , Fomichev V T , Emelyanov D V , Matvievskiy A A , Holschemacher K , Boushi M S , Bazeeva E Yu 
Published: November 2020

Abstract
A technology is proposed for producing electrochemically and electromagnetically activated water and, from the standpoint of resource saving, high-quality cement composite materials. The results of the physicochemical analysis and morphology of the sediment of naturally non-mineralized water activated by different regimes are presented. A quantitative and qualitative X-ray phase analysis, as well as the results of the study of the microstructure of cement stone samples based on mixing water activated in different modes, are given. The strength indicators of cement stone, mortar and concrete samples were established, and the results of a study of the water resistance of cement composites made with the use of activated mixing water were presented. It has been established that electrochemical and electromagnetic activation of mixing water contributes to a change in its physicochemical properties, influences the structure-forming factors of the cement stone and contributes to the improvement of the strength and performance indicators of cement composite materials.
Dynamic Correction of the Construction Projects Scheduling Implementation under Stochastic Influences
Authors: Dobrosotskikh M G , Mishchenko V Ya , Mishchenko A V 
Published: November 2020

Abstract
The research results of this paper show that parameters of the catch-up schedule are determined by the dynamics of time-averaged volumes, rates and accelerations of construction jobs only when discrete nature of resources consumed has a weak influence on the rate of project jobs. On the other hand, if the speed of job is determined by the use of nostockable resources, the dynamics of jobs volume demonstrates the weak sensitivity both to the discrete nature of resources and to external stochastic influences. In this, the speed and acceleration of jobs experience jumps at the times of changes in the number of resources used. Thus, a time-averaging operation leads to the loss of information about these features of construction dynamics. In this paper the algorithms for stochastic factors accounting (characterized by different influences on the project implementation) are formulated. Moreover, the algorithm for forming the catch-up jobs schedule is obtained based on the results of monitoring of the jobs pace and averaging only over periods of a constant composition of a number of discrete resources. Furthermore, both empirical methods of separation of stochastic and deterministic impacts on the project implementation, as well as a method based on the qualitative difference in the Fourier spectra of stochastic and deterministic functions, have been developed. The limits of applicability of the empirical and exact methods are analyzed. It is shown that the Fourier analysis of the monitoring results allows to completely recover the deterministic information even against the background of the stochastic signal that coincides with it. It is shown that the proposed algorithm makes the formulation of catch-up jobs scheduling parameters possible, allowing to avoid financial and image losses associated with the untimely end of the project or its main parts.
Fortification of building’s foundations with eco-friendly materials as means to safer and more comfortable urban environment
Authors: Zakrevskaya L V , Lubin P A , Gandelsman I A , Andreeva K A 
Published: November 2020

AbstractIn this paper we tested mechanical aspects of chemical reactions as means to fortification of clay soil. We also tested properties of soil-concrete using waste of dolomite and chrysotile asbestos. The composition and properties of the composites are presented along with the comparison with traditional reinforced cementing materials. Main testing means of properties were method of x-ray phase analysis, electric scanning microscopy, soil strength changes and soil internal friction angle changes.
Study of the Behavior of Cement Composites in the Conditions of Cyclic Exposure Positive and Negative Temperatures
Authors: Erofeeva I V , Afonin V V , Emelyanov D V , Fedortsov V A , Moiseev V V , Podzhivotov N Yu , Zotkina M M 
Published: November 2020

Abstract
The paper presents the results of tests of cement composites under the conditions of cyclic exposure to negative and positive temperatures for 45 days. The stability factor (durability) compares the compositions with various fillers and additives. Resistance (long-term preservation of the structure and properties) of composites was estimated from the change in the relative hardness of the material, characterized by the area of the polygon, obtained as a result of a piecewise linear approximation of the exposure points of the test materials.
Creep mathematical model on the example of early age concrete
Authors: Yakubovskiy Y E , Kolosov V I , Donkova I A , Kruglov S O 
Published: November 2020

Abstract
The objective of the study is development of a creep kernel recording form, which allows obtaining representations for creep curves calculation. Based on the elastic-creeping body theory a possibility of the high-rate creep movement analytical study has been shown. A creep kernel, which contains a formula to describe the aging material properties, has been built. Essential stages of the proposed creep kernel formation have been given. The correspondence of the proposed calculations to real processes has been proved by a comparison with experimental data. In the numerical implementation, decomposition of integration elements into power series has been used. A possibility of calculating functions for a long time interval has been shown. Creep kernel parameters have been determined on the basis of experimental data of early age concrete samples by minimizing the standard deviation of theoretical and empirical values.
The Quality of Heat-Insulating Masonry Mortar with Perlite
Authors: Gerasimova E S , Il’yina A D 
Published: November 2020

Abstract
A quality for any building material including the dry construction mixtures is very important. This is a complex concept that includes a set of properties that determines their suitability for intended use. So the heat-insulating masonry mortar should simultaneously have a low coefficient of thermal conductivity, sufficient strength, sufficient frost resistance, etc. And the material not always possesses the characteristics that the manufacturer claims. In this regard it is of interest to conduct tests of finished products for their compliance both Russian Standard and presented characteristics. This work is devoted to main properties determination of heat-insulating masonry mortar produced by JSC “Quick–mix”.
Nurturing cognitive skills in undergraduates with the help of ontological analysis
Authors: Gushchin A N , Divakova M N 
Published: November 2020

Abstract
The article deals with the didactic problem that arises in the two-stage system of bachelor’s study -master. During the period of study in the master’s program, the bachelor needs to make a qualitative leap in the style of thinking and move from the visual-language thinking of the bachelor to the critical conceptual thinking of the master. Why bachelor needs to acquire cognitive skills as soon as possible. The article substantiates the use of the ontological analysis method as a didactic tool for teaching undergraduates. The effectiveness of ontological analysis as a didactic tool with specific examples is demonstrated.
Assessment of uncertainties and risks related to implementation of infrastructure projects
Authors: Reznikov D O 
Published: November 2020

Abstract
The paper considers principles of assessing uncertainties and risks related to realization of infrastructure projects. The procedure for the examination of the proposed infrastructure project should use the methodological toolkit of risk theory, which was developed to assess safety of complex technical systems. A risk-based approach to the assessment of infrastructure projects involves a scenario assessment of the project, taking into account the influence of potential hazardous natural, technological, economic and socio-political factors that can significantly complicate the project implementation. A set of indexes allowing one to assess and compare different variants of the infrastructure project implementation is presented.
Selection of methods of inspection of building structures to prevent damage
Authors: Mishchenko V Ya , Sergeev Yu D , Sergeeva A Yu , Myasischev V Yu , Myasischev R Yu 
Published: November 2020

Abstract
This article discusses the mechanism studies of the functional provisions of the building construction, and identification of symptoms, in the case of which it’s possible to forecast the appearance of accidents. The main purpose of this work is to find what kind of next examination should be performed otherwise, what sign that affects better than the others on the breakdown of the construction, you need to find to prevent its collapse and have time to take preventive measures to restore. In the work developed methods to determine the correct symptom, affecting more than any other on the disruption of the structure. An algorithm for the control of the system has been determined, Algorithm of monitoring when the life cycle of construction is maximum. It is proved that the issue of monitoring the priority or determination of the sign influencing the building breakdown can be defined by methods of nonlinear programming (parametric optimization). An algorithm which searches the main technical position of construction when the risk of disruption of the structure is minimal is developed.
Analysis of industrial areas of Ekaterinburg
Authors: Alekseeva A V , Pridvizhkin S V , Mazaev G V 
Published: November 2020

Abstract
The article views the relationship between the change in the purpose of the industrial area and the planning structure of the city. Moreover it includes the proposed gradation of enterprises depending on the area of their industrial sites. Also the text point out the uniqueness of the industrial site of PJSC “Uralmashzavod” among other enterprises of the heavy industry of the city of Ekaterinburg.
Some Economical Methods of Assessment of Ecological Products and Service
Authors: Vlasov V B , Mishchenko V Ya , Makeev A I 
Published: November 2020

Abstract
In this work, authors try to lay the methodological foundation of cost assessment of ecological products and service, which were free in Russian Federation. Transferring more and more products and services to market appeal as market objects means more effective and rational using them with different market mechanisms complexes. Current economic practice does not provide effective using of nature recourses such as water for economical subjects, who control it, and for recourse’s consumers. On the basis of research in ten villages of Voronezh region authors reveal some significant reserves in improving effectiveness of the system. The essence of the method is necessity of meticulous research of all characters of resource’s demand and revealing its extreme utility. On the basis of research’s results were revealed that customer always wants to have more qualify product of service and pay higher price of them. In the job you can find specific example of using the method and some practical recommendations of its rational using. Authors suggest and substantiate the necessity of including the characters of ecological and economical effect and damage in the assessment of effectiveness of different vectors of development.
Simulation gas combustion process in modern heat generators of small and medium power
Authors: Valeev M , Dyudina A , Fatikhov A A , Ziganshin M 
Published: November 2020

Abstract
The paper presents the problems of numerical modelling of burners and fireboxes the heat generators. The designs household generators placed directly on the premises, in the last decades, for the goal of commercial appeal, tend become to more and more compact, which leads to a reduction of the firebox to a burn zone’s volume ratio. The numerical study of combustion processes using computational fluid dynamics (CFD) was carried out on the Unimat UT-L18 “Bosch” boiler, the gas heating convector “FEG” Beata 2, and the Vitodens 100-W “Viessmann” boiler. Computations were based on a one-stage combustion process of methane, both mixes with air and oxygen. Geometric models of fireboxes were developed by corresponding to their constructive features, the necessary boundary and initial conditions of furnace processes were determined, temperature, aerodynamic and concentration characteristics of gas fuel combustion processes were also presented. The models provided an opportunity for the quantitative analysis of furnace and burner devices of this heat generators degree of perfections. Also, the completeness of the oxidation of combustible components of the fuel-air mixture in fireboxes, differing in the degree close walls to burn zone, was compared. The obtained results allow to perform the improvement of the furnace and burner devices of domestic heat generators for using at design energy-efficient structures of decentralized heat systems, including individual heat supply in the residential and industrial building.
Reducing water pollution risks by wash water from water treatment plants
Authors: Brayalovsky G B , Naschetnikova O B , Migalatiy E V 
Published: November 2020

Abstract
The article analyses chemical methods to treat washwater from rapid filters at surface water treatment plants. The review of existing approaches to the application of rapid filter washwater is carried out. During the research work washwater from rapid filters was chemically treated with coagulant “Bopak-E”, flocculants “Praestol”, and sorbent-coprecipitant reagent “Ecosol-401”. The doses of reagents were selected and the efficiency of water purification from turbidity and chromaticity was shown. The proposed technology of washwater treatment allows to obtain drinking quality water after sedimentation and filtering.
Deceleration of the Cold Flow in the Vortex Tube
Authors: Anoshin N , Khait A , Bianco V , Noskov A , Alekhin V 
Published: November 2020

Abstract
Enhancement of the cold flow deceleration unit is considered in the paper to improve the energetic efficiency of the vortex tube. It was shown that the gradual expansion of the cross-section in the cold flow diffuser is inefficient for reducing the gas flow velocity in presence of its significant rotation. Installation of a blade grid at the entrance to the cold flow diffuser was suggested for interruption of the flow swirling. A notable reduction of the energy losses has been demonstrated improving the efficiency of the vortex tube.
ARGarden: 3D outdoor landscape design using handheld augmented reality with multi-user interaction
Authors: Fadzli F E , Yusof M A Mohd , Ismail A W , Salam M S Hj , Ismail N A 
Published: November 2020

Abstract
Augmented Reality (AR) is a technology to display the virtual object by overlaying on the physical marker in the real environment. Nowadays, the handheld device becomes a trend in AR since it has high processing power and compatible with the AR system. However, most of the AR applications did not fully support the interaction from multiple users for the collaborative AR interface. Therefore, this research aim is to develop multi-user interaction for collaborative handheld AR. There are a few phases involved to design and develop the collaborative AR application for the handheld device called ARGarden. All the interaction that has been done for the virtual object transformation such as translation, rotation and scaling can be seen by the other users, and this data is synchronized by using a network protocol. Then, a queue system is implemented for the multi-user interaction to allow the virtual object can only be selected by one user at one time, and the other users must wait for their turn. The significance of this research is all the method that has been implemented for the ARGarden can be applied in different fields such as simulation, modelling, medical and education.
Object selection and scaling using multimodal interaction in mixed reality
Authors: Aladin M Y F , Ismail A W , Ismail N A , Rahim M S M 
Published: November 2020

Abstract
Mixed Reality (MR) is the next evolution of human interacting with the computer as MR has the ability to combine the physical environment and digital environment and making them coexist with each other. Interaction is still a huge research area in Augmented Reality (AR) but very less in MR, this is due to current advanced MR display techniques still not robust and intuitive enough to let the user to naturally interact with 3D content. New techniques on user interaction have been widely studied, the advanced technique in interaction when the system able to invoke more than one input modalities. Multimodal interaction undertakes to deliver intuitive multiple objects manipulation with gestures. This paper discusses the multimodal interaction technique using gesture and speech which the proposed experimental setup to implement multimodal in the MR interface. The real hand gesture is combined with speech inputs in MR to perform spatial object manipulations. The paper explains the implementation stage that involves interaction using gesture and speech inputs to enhance user experience in MR workspace. After acquiring gesture input and speech commands, spatial manipulation for selection and scaling using multimodal interaction has been invoked, and this paper ends with a discussion.
Educational mobile game for learning English words
Authors: Ng B K , Suaib N M , Sihes A J , Ali A , Shah Z A 
Published: November 2020

AbstractEnglish is a second language in Malaysia and English language skills are vital for Malaysians. Mobile technologies such as mobile phone can be a great tool for educational purposes since it can increase students’ engagement and is a popular tool for interactive digital media. This paper discusses the development of an educational mobile game called EWORD for learning English words, for primary school kids. There were four phases involved; preliminary analysis, game design, game development and game evaluation. In the first phase, the fundamental knowledge of English words and vocabulary, English language learning methods in Malaysia, traditional learning methods, and educational mobile game were studied to acquire adequate information about the requirements for educational mobile game. User Interface (UI), gameplay, and game mechanics were designed in the second phase, while the mobile game prototype was developed in the third phase. In the fourth phase, the evaluation was conducted to evaluate the usability of the educational mobile game prototype. Based on the results, the educational mobile game helps in boosting the learnability of English words among students and is capable to increase student engagement.
Finger-Ray Interaction using Real Hand in Handheld Augmented Reality Interface
Authors: Yusof C S , Halim N A A , Nor’a M N A , Ismail A W 
Published: November 2020

Abstract
Augmented Reality (AR) is the technology that augments the real world by using virtual information of 3D objects overlaid on a view of the real environment. This will create an immersive and intuitive experience. As handheld devices are widely used and now has climb with increasing demand of specifications, its interaction based on touch is a natural and appealing input style for the application of AR. Furthermore, most heuristic studies of interaction in AR usually focus on interactions with AR Target close to the user, generally within arm’s reach. As the user’s move farther away, the effectiveness and usability of the interaction modalities may be different. This study explores handheld AR interaction using real hand gesture at a distance in a room-scale setup. Our aim is to investigate the effectiveness of performing selection while being far away from the 3D object and performing selection task towards object that is being occluded. As object manipulation is one of the key features to explore for mobile handheld AR, we hope our study can give some contribution towards its practical use, especially for real-world assembly structure. Hence, our paper proposes finger ray interaction technique for real hand in handheld AR interface to work for selecting objects at distances ranging from 3 feet to 8 feet and when the object being occluded ranging from 20% to 80% occluded.
MR-Deco: Mixed Reality Application for Interior Planning and Designing
Authors: Fadzli F E , Ismail A W , Talib R , Alias R A , Ashari Z M 
Published: November 2020

Abstract
Over the past few years, Augmented Reality (AR) and Virtual Reality (VR) have become a phenomenon in this new era and nowadays smartphone device can enable these technologies quickly and seamlessly through downloadable applications. Some of them are to benefits community and others just for entertainment purposes such as movies and games. Despite their goal, researchers take the opportunity to use Mixed Reality (MR) technology as it is suitable for real-life usage by users as its low cost and it can replace the conventional way of rearranging the furniture for interior design application. MR also brings design and planning, interior design, and engineering into a digital world where people can operate the prototype without having to physically involve in real life. A user should be able to interact intuitively with the virtual content in real-time. This paper identifies the integration for both AR and VR fusion for the MR environment. It also discusses the suitable user interaction technique can be applied in interior design in the MR environment, called MR-Deco.
Design and development of learning mathematics game for primary school using handheld augmented reality
Authors: Song E , Suaib N M , Sihes A J , Alwee R , Yunos Z Mohd 
Published: November 2020

Abstract
The traditional learning methods have some drawbacks and limitation such as restricted learning space, high cost, and lack of student engagement. In the era of digitalization, traditional education starts to transform into a more dynamic and modern education with the influence of the 21st-century learning method. Moreover, due to the pandemic, schools and universities are moving to digital learning to contain the spread of Coronavirus Disease 2019 (COVID-19). Therefore, the aim of this project is to develop a Mathematics game using handheld Augmented Reality (HAR) for primary school children as an alternative method in learning Mathematics. There are three main phases have been carried out, first is to study the requirements of an educational game. The second phase involves the design and development including the game element, storyline, game characters as well as user interface design. Finally, the third phase is integrating the learning Mathematics game using HAR, followed by evaluation. The evaluation of the learning Mathematics game was carried out for usability and user acceptance. The usability results show that the users are satisfied with the prototype and feedbacks show the game is fun. Overall, this project has successfully produced a learning Mathematics game using HAR for primary school children.