bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Anthropometry Methods in Ergonomic Chair Redesign to Prevent Fatigue A Case Study UKM Lestari Jaya, Tulungagung
Authors: Silviana  , Hardianto A , Hermawan D , Abdurahman
Published: February 2021

Small and Medium Enterprises (UKM) Lestari Jaya is one of the home industries in Pucuk Village, Tulungagung Regency that produces chips from processed cassava ingredients which are commonly called samiler. These samiler chips are produced using manual methods so that the production process still depends on workers. So far, the work chairs used for military production, especially in the printing process, are not ergonomic and cause fatigue. This work chair is said to be not ergonomic in terms of the form of the backrest that is far from the back of the worker, the size that does not fit the worker’s body shape, the chair material is made of plastic and the resistance of the chair in accepting body loads. Based on data from the Nordic Body Map questionnaire distributed to workers, chairs that are not ergonomic can cause fatigue in workers. Based on the above problems, a study was carried out to redesign an ergonomic work chair with the aim of reducing the risk of fatigue in workers. The anthropometric calculation of percentiles is used to determine chair size. The data is in the form of the 95th percentile for the seat height (45 cm) so that it can be used for people who have long or short legs, the 95th percentile for the width of the seat base (44.02 cm) so that the size of the seat base is wide, the 50th percentile is for the back height ( 56.58 cm) so that it can be used for tall and short people, the 50th percentile is for the length of the seat base (44.93 cm) so that people with large and small popliteal bottoms can use this chair, and the 50th percentile is for the height of the armrests (23, 95 cm) to fit the average human hand size. The advantages of this chair design are that it is stronger, the size of the chair is in accordance with the worker’s body size and the addition of functions, namely that the chair’s height can be raised or lowered according to the worker’s body size
Physical Properties of Liquid Soap using Katuk Leaf Extract (sauropus androgynus (l) merr.) as an Alternative to Natural Surfactants
Authors: Mursal I L P , Hermana V A , Farhamzah
Published: February 2021

Katuk leaves (Sauropus androgynous (L) Merr.) contain saponins that can potentially act as natural surfactants to replace Sodium Lauryl Sulfate (SLS). This study aims to determine the variation in the concentration of katuk leaf extract (Sauropus androgynous (L) Merr.) On the results of testing the physical properties of liquid soap formulations and to determine the potential of katuk leaf extract as an alternative to natural surfactant substitute (Sauropus androgynous (L) Merr) in the formulation. Liquid soap preparations. The liquid soap formulation of katuk leaf extract with concentrations of 1%, 3%, 5%, 7%, and 9% was replicated 5 times. The physical properties test carried out were organoleptic testing, pH, foam height, specific gravity, and viscosity. Based on the research that has been done, it can be concluded that the variation in the concentration of katuk leaf extract affects the physical properties of liquid soap includes organoleptic, pH, high foam, specific gravity, and viscosity. The liquid soap formulation uses katuk leaf extract has potential as an alternative to natural surfactants instead of surfactants. It can be known that the three formulas, namely F1, F2, and F3 as a whole meet SNI standards.
Development of Virtual Reality Application to Increase Student Learning Motivation with Interactive Learning in Vocational Education
Authors: Maulana F I , Purnomo A
Published: February 2021

In Vocational Education, learning by doing is very important to complement the concept of learning with technical introduction to maximize the results of the material received. However, in various subject areas, learning is still carried out conventionally and students are unable to apply their knowledge practically even though they have theoretical understanding. This is closely related to the lack of motivation from students in the classroom because there is no interactive course content required for visualization of concepts in each subject area. Even during the COVID-19 pandemic, teaching and learning activities had to be carried out online at their respective homes. So that further limits the scope of student practice to maximize learning outcomes. As a result, it is not possible for students to understand more in-depth concepts of subject matter using conventional learning methods. Students’ motivation to learn will increase if students are provided with practical tools so that they can be visually involved and engage with what they teach in class. The development of practical tools with Virtual Reality technology, which can visualize 3D models can be a solution to meet this goal. The main objective of this paper is to create and use Virtual Reality as an immersive learning medium and its contribution to student motivation to understand the definition of subject matter in various fields.
Analysis of Custom IoT Based Electricity Monitoring System
Authors: Eridani D , Widianto E D , Yulianto A R
Published: February 2021

Electricity is a resource that currently exists in various sectors of the community. Each person’s electricity needs are different depending on the needs of the electronic equipment used. Excessive use of electronic equipment creates extreme electrical power. Electricity consumption is an issue that discussed since a long ago. This research aims to present a custom electronic sensor to monitor electricity consumption based on the Internet of Things. It also explained the correlation between input and output points from the custom electronic sensor. This research method consists of 4 steps: system requirement, system design, system implementation, and last, testing and analysis. The system developed is able to get the current, voltage, and power data. The data then processed by Arduino UNO and directly send by ESP8266 to Blynk Application on Android smartphones via Internet communication. The voltage testing is done in the voltage and current sensors to get the program’s main loop’s constant values. The system input value and the Blynk Application value are also measured to check the system’s error.
E-money Academic: Lesson from Literature Visualizing Scientometric Positioning (1968-2019)
Authors: Purnomo A , Firdaus M , Hasanah U , Sano A V D , Prasnowo M A
Published: February 2021

There is no overview of literature in the area of e-money research which shows the big picture using data from all countries This paper aims to review the status and visual map position of research in the e-money literature indexed Scopus that used a scientometric positioning overview. The research was carried out using bibliometric techniques. Data analysis as well as visualization utilizing VOSViewer program and the Scopus function for analyse search results. In this review, the details collected applied to 3,011 documents issued from 1968 through 2019. The study reveal that Miller, A. and Chinese Academy of Sciences were the most active individual scientists and affiliated institutions in e-money literature. In emoney, computer science and Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics were the most areas of study and dissemination sources. There were nine worldwide group maps with collaborative researchers. In order to identify the body of knowledge created from fifty-one years of literature, this study constructed a convergence axis grouping comprising of e-money: Mobile telecommunication system, Electronic cash system, Finance, Profitability, Investments, Intelligent system, abbreviated as MEFPII themes.
A model of inductive charging technique in battery electric vehicles(BEVs)
Authors: Mishra Partha , Bhakta Arpita , Sarkar Rittick , Jasmin Farzana
Published: February 2021

In this paper a prototype model has been designed. In this study a theoretical concept of a simple but effective method for inductive charging in battery electric vehicles(BEV) has been proposed. It has been observed in experimental study that power can be transferred wirelessly from transmitter to receiver using inductive coupling principles. In this article a prototype model has been designed to observe the inductive charging and also the inductive resonant coupling. It has also been observed experimentally that the power output of the wireless charging model significantly based on the resonant condition between the transmitting and receiving coils. In this article a proposed model has been presented to focus on the inductive coupling power transfer technique which is used for charging of a battery electric vehicles(BEVs). The proposed model and its experimental results successfully describes the inductive charging technique and the maximum power transfer occurs when resonant condition achieved by the two coils in very smaller distance. This model is very effective to established the concept of wireless power transfer in very smaller coil size. The experimental implementation of the design is made with digital multimeter, milliammeter, power-MOSFETS, voltage regulator IC, oscillator and diode rectifier circuit.in the transmitter and receiver coils.
Quality Analysis of Tribal Casting Products by TOPSIS for Different Gating System
Authors: Roy Soumyajit , Pramanick Akshay Kr. , Datta Prasanta Kr.
Published: February 2021

Indian Tribal Products has high demand in the International market but the quality of the Tribal Products are not been analyzed by scientific technique, as no R&D is involved with the sector. A Lost-Wax Investment cast metal craft traditions were adopted for the project which has been in practice from the ancient age. An experiment was designed and done to understand the effect of gating design which controls the quality of the casting. The quality of castings was analyzed based on Eccentricity, Uniformity of Thickness, Surface Quality and Surface Roughness. The preferable gating system was chosen using TOPSIS.
Effect of partial wall motion on MHD mixed convection heat transfer undergoing in a porous cavity filled with Cu–water nanofluid with a centrally mounted heat source
Authors: Mondal Milan K. , Biswas Nirmalendu , Sarkar U. K. , Manna Nirmal K. , Mandal D. K.
Published: February 2021

The Magneto-hydrodynamics (MHD) convective heat transfer process in a partially driven cavity (PDC) containing a centrally mounted heat source is focused in the present study. The cavity is filled with Cu–water nanofluid saturated porous medium. Heated cavity fluid is cooled through the upper half of the two sidewalls. These cold sidewalls are allowed to move in upward direction at the same velocity. The horizontal walls and lower part of the sidewalls are insulated. The cavity subjected to an externally imposed uniform magnetic field. The flow structures and mixed convection heat transfer characteristics are analyzed numerically utilizing developed CFD code adopting FVM and SIMPLE algorithm. The thermo-fluid phenomena are analyzed under a range of governing parameters like Richardson number (Ri), Hartmann number (Ha), concentrations of nanoparticles (ϕ). The results reflect that the heat transfer characteristics of the PDC are greatly influenced by all of the above parameters. Heat transfer is enhanced significantly at the higher Ri and higher volume fraction.
Feasibility study of a liquid desiccant based marine air conditioning system using waste heat of diesel alternators
Authors: Iyer P K , Ganguly A.
Published: February 2021

The present article proposes an alternative form of an air conditioning system for ships using a packed bed liquid desiccant based dehumidification system, followed with regenerative evaporative cooling of air. Abundantly available waste heat from the hot water of Diesel Alternators (DA) is proposed for the regeneration of the desiccant, and seawater for cooling the hot desiccant. A thermal model of the system has been developed and analyzed. The study revealed that the proposed packed bed liquid desiccant system can dehumidify the outdoor air to well below the design humidity ratio (11g kgda
−1). Also, the regeneration of the desiccant through hot water from the DA system is feasible, with a temperature range of 73°C to 90°C. The target enthalpy (43.84 kJ kg−1) can be achieved with a branching ratio of 0.25 to 0.4 at the regenerative evaporative cooler.
Design of Solar Powered Desiccant based Air Handling Unit
Authors: Chaturvedi Vyom , Vishwakarma Devendra Kumar , Bhattacharyya Suvanjan
Published: February 2021

Using an air handling unit (AHU) is a suitable method to meet the ventilation requirements in a conditioned space. This paper proposes two novel design configurations of AHUs, which ensure that the excess load on the AHU cooling coil is minimized using air to air heat recovery units, a desiccant based rotary dehumidifier, and an evaporative cooler. The proposed design is also capable of harvesting surplus water in the process. The impact assessment of the proposed designs is illustrated taking the example of a typical high-humidity design case. Simplified mathematical models were used to analyze the power-saving and moisture harvesting potential of the two configurations. Calculations show that both the configurations reduce the excess load on the cooling coil by a significant amount, while also co-producing surplus water for domestic use.
Air Quality Index Effect on Particles Deposition in Human Respiratory Tract under Natural Breath
Authors: Singh Digamber
Published: February 2021

The huge demands of material goods decayed the breathing air quality. Now, it is reflecting on the clinical respiratory test of humans. Therefore, it is a serious issue that needs to be taken care of. The article throws-up light on important factor such as a deposition of inspired toxic particles under natural breath. The inspired particles are having an aerodynamic diameter 2.5 µm and 10 µm. A three-dimensional CT-scan based Human Respiratory Tract is successfully re-constructed nasal cavity to 7th generation bronchi. The flow is developed during inhalation laminar to turbulent from external nostrils to the tracheobronchial airway due to anatomical effect. It is affected the particles deposition on the various regions due to inertial impaction or curved shape surface of the airway model. The appropriate turbulence model quantifies the internal flow features so that an accurate trajectory of particles transport pattern can be presented. The discrete phase model (DPM) is used for particles tracing on Language frame, which gives the combined effect of anatomical structure and airflow impact on the deposition of particles. It could be useful for the diagnosis of Human airways illness.
Micro analysis of riverbank sediment stability under different wetted surface conditions
Authors: Biswas Debasish , Dutta Arijit , Mukherjee Sanchayan , Mazumdar Asis
Published: February 2021

Quantity of water entrapped between sediment particles imparts strength up to a limit and increases the stability of a riverbank. In the present study, this strength of the sediments has been investigated in terms of escape velocity of the sediments. Escape velocity has a considerable impact on the stability of the bank surface. Here, the “Truncated Pyramid Model (TPM)” for arrangement of the sediments has been utilized to determine escape velocity for different wetted surface conditions and inter-granular spaces. It has been found from the present investigation that irrespective of the variability in the riverbank morphology, the escape velocity attains a large value due to enhancement of the wetted surface area resulting in riverbank stability.
Sunlight mediated photocatalytic reduction of aqueous Cr(Vl) using metal hexacyanoferrate (M = Mn, Ni, Cu and Zn)
Authors: Mandal Manas , Chattopadhyay Krishna , Bhattacharya Swapan Kumar
Published: February 2021

Four different metal hexacyanoferrates, MHCF (M = Mn, Ni, Cu and Zn) were synthesized via a simple, cost effective precipitation method. The as-synthesized MHCF were characterized using XRD analysis and FESEM images were recorded for the analysis of morphology. Among the four compounds, ZnHCF exhibited most effective catalytic property for visible-light driven photoreduction of Cr(VI) to Cr(III), with excellent photochemical reducing capability of 68% within 2 h.
Heat Transfer and Pressure Drop in Transitional Flow: A Short Review
Authors: Bhattacharyya Suvanjan , Vishwakarma Devendra Kumar , Soni Manoj Kumar
Published: February 2021

In the present work, an effort has been made to present the short review of all the numerical as well as experimental studies done in the field of heat transfer and pressure drop in the transitional flow regime. The experimental and numerical studies on transition flow are reported. Though, there are several challenges to do experiments in transition flow regime. Various techniques are also discussed and summarized. Results show that the techniques prove outstanding performance, but few methods quiet suffer from high pressure drop. As per discussion, new viewpoints on the current research gaps and future research ways have been providing for the development of heat transfer techniques.
Nutmeg oil production process analysis using Business Process Improvement-a case study
Authors: Darma R , Sastra H Y , Arhami  , Erwan F
Published: February 2021

This study delivers the analysis of business process of the nutmeg oil production process in a small and medium enterprise (SME) in South Aceh using Business Process Improvement (BPI). This study analyses the pre-refining, refining and post refining activities of the nutmeg oil production process based on economics, labour, and technology aspects. This study carries out 3 phases of BPI which are organizing for improvement, understanding the process, and streamlining. This study reveals activity efficiency from 31 (on the as-is model) to 26 (on the to-be-model). The activities are further analysed using Devil’s Quadrangle, particularly for cost and time dimensions. As a result of the new technology implementation being proposed, the fixed cost has increased by 48.33%, the variable cost has decreased by 47.64% and time has improved by 33.33%. Moreover, this study provides a recommendation to implement the to-be-model of the business process as an SOP for the nutmeg oil production process in South Aceh SMEs.
The integrated lean and green manufacturing system: a case study at the peeled loaf production
Authors: Ilyas  , Suhendrianto  , Lufika Raihan Dara , Meutia Syafira
Published: February 2021

The bakery industries soared as bread become one of the staple food for many people. UD. ABC is one of the bakeries in Banda Aceh that produces various types of bread and jam includes the peeled loaf. Peeled loaf uses many machines for its production process thus will produce waste and consume lots of energy. This study aims to analyze waste and measure energy use in the production process of peeled loaf based on the integrated Lean and Green Manufacturing concept. There are VSM and EVSM as a tool to describe the flow of material and energy usage from the production process. The activities of Value Added (VA), Non-Value Added (NVA) and Necessary Non-Value Added (NNVA) will be analyzed using PAM. The tool for improvement recommendations is five whys analysis. Then, the Future State Map (FSM) shows the improved design with a reduction in the lead time of 20.28 minutes. From this study also obtained the results of saving energy use as much as 0.13 kWh. This energy-saving will realize a lean and environmentally friendly production process at UD. ABC.
Performance of GLCM Algorithm for Extracting Features to Differentiate Normal and Abnormal Brain Images
Authors: Indra Zul , Jusman Yessi
Published: February 2021

Brain cancer is a malignant brain tumor that can spread quickly to other parts of the brain and spine. However, not all tumors are malignant and can be treated before they become malignant. The purpose of this study is to discover brain abnormalities based on CT scan images by using T-test algorithm. Thus, it can be one of solution for early detection of brain abnormalities in order to treat it before it becomes a malignant tumor or cancer. As dataset, this research using 40 images consisting of 20 normal brain images and 20 abnormal brain images. There are two algorithms which are used in this research i.e. Gray level co-occurrences matrix (GLCM) for feature extraction and T-Test for brain image classification. Prior to feature extraction, brain image is converted to Graycomatrix in order to adjust the brightness of the image. The final step is image classification by using the T-test algorithm. From 40 test results which are used in this study, GLCM method can extract 8 features that can significantly distinguish the image of normal brain and abnormal brain. For the T-test algorithm, it is found that each feature has a P-value <0.05 which means that extracted features can be used for the further classification process of brain image abnormality. Thus, it can be inferred that this research framework which is employed the GLCM and T-test algorithm can be used to assist the process of early diagnosis of brain cancer.
Performance Measurement Analysis Using The Balanced Scorecard Method for Government Institution in Aceh
Authors: Lufika Raihan Dara , Syahriza  , Sary Cut Indrian
Published: February 2021

The public and non public company have the same goals in adjusting their technology and system for competition. The performance measurement is one way to control the company to achieve their vision and mission. This research aims to determine whether or not the performance of a government institution in Aceh is according to their standard. The first step is identify the problems using the Balanced Scorecard method, with four perspectives, namely financial, customer, internal business processes, and growth and learning. The result shows that there are 18 Key Performance Indicators (KPI). The next step is to calculate the values of each indicators. Finally, the result is compared with the KPI standard. The final result shows that the lowest value of indicator in 2017 is the simple work procedures with a score of 47 and a final score of 0.015. Meanwhile, the highest value of indicator in 2017 is the budget utilisation with a score of 124 and the final score of 0.245. Overall, the Disperindagkop has a very low value of 13% which means the condition is very bad. Therefore, the company needs further improvements to increase their overall performance value.
Experimental assessment of solar radiation effect on the stress-strain state of a span with an orthotropic slab
Authors: Gridnev S Yu , Podlesnykh I S , Barchenkova N A
Published: February 2021

The article is devoted to the experimental assessment of the solar radiation effect on the stress-strain state of a span with an orthotropic slab. Preliminary, comprehensive instrumental measurements of the road surface temperature distribution and the span elements were carried out at different times of the year. A detailed picture of the temperature distribution over the cross-section height was determined at different air temperatures and the Sun positions. To assess the solar radiation effect, instrumental measurements of deflections and deformations of the span‘s main beams under the influence of solar radiation were carried out and the nature of the change in the stress-strain state of the span during the day was determined. The measurements were carried out using the deflection meters and strain gauges mounted on the main beams that experience uneven heating throughout the day. Using the developed and previously tested finite element model, the calculated values of the span bearing elements‘ stress-strain state parameters for each case of exposure to solar radiation have been determined, taking into account the experimentally obtained temperatures. Comparison of the calculation results obtained on the basis of field measurements and calculation in the program of the finite element method has been carried out. The most unfavorable cases of the solar radiation effect on the main beams‘ displacement have been revealed.
Energy method for solving the stability problem of an elastic rod with variable stiffness taking into account its dead weight
Authors: Yazyev S B , Akhtyamova L Sh , Chepurnenko V S , Reshetnikov A A , Ziganshin A D
Published: February 2021

The article is devoted to solving the stability problem of an elastic rod with variable stiffness taking into account its dead weight. The variable stiffness parameter is the rod section, in particular, the moment of inertia Iz(x). The moment of the section inertia and the intensity of the distributed load (dead weight) vary according to the power law. As a result, the solution of the resolving integro-differential equation for this model (cantilever rod) by the energy method was obtained. It is shown that the obtained solution allows satisfying all boundary conditions and another approach to the energy method use is found. The energy method in this case made it possible to determine the exact values of the critical load with a particular change in the rod cross-section taking into account its dead weight.
Comparative analysis of typical and reinforced support parts’ design parameters for reinforced concrete roof beams
Authors: Degtyarev G V , Saida S K , Hajal Ahmad Al
Published: February 2021

Reinforced concrete roof beams are the structural elements of industrial buildings that are most susceptible to destruction in emergency situations and abnormal operation are observed; the schemes for strengthening beams are proposed and the parameters’ analysis in comparison with a typical solution is given.
Research of the additional building influence on the foundation in a stress superposition existing along the radius zone
Authors: Ali Yahya Nasser Al-Bukhaiti , Keita Yaya , Ledenyov V V , Savinov Ya V , Umnova O V
Published: February 2021

The comprehensive studies’ results of the soil environment stress-strain state from the loaded and unloaded foundation model action are considered and compared:

1. Laboratory experiments with foundation models were carried out, on the basis of which a numerical SSS soil foundation analysis was carried out, empirical relationships between the influencing parameters and the foundations’ additional settlement amount due to their mutual influence on each other were obtained.

2. Numerical modeling of foundations located in the mutual influence zone by the finite element method of numerical research using the software package Plaxis 3D was performed.

3. A numerical analysis of the influence of the distances between the stamps’ axes on the additional stresses’ values from the loaded foundation is given using the method of angular points, as a method recommended by the current regulatory documentation [13].

These results can be used to refine the existing calculation methods. The difference between the results of numerical and experimental modeling is noted.
Determination of stress-strain state of short eccentrically loaded concrete-filled steel tubular (CFST) columns using finite element method with reducing the problem from three-dimensional to two-dimensional
Authors: Chepurnenko V S , Yazyev B M , Urvachev P M , Avakov A A
Published: February 2021

The article presents the derivation of the FEM equations, which make possible to calculate short concrete-filled steel tubular columns in a plane elastic formulation. Steel tube is modeled by 1D bar finite elements. The obtained results are compared with the results of calculations using 3D solid and shell finite elements.
Bamboo in modern construction and architecture
Authors: Lapina A P , Zakieva N I
Published: February 2021

The use of bamboo in construction and architecture is considered in the article. The main advantages of bamboo in comparison with modern building materials are considered, some technical characteristics of the material are given. The conclusion about bamboo as a renewable natural material, which in the future may replace the steel and reinforced concrete structures people are used to, was made. The design characteristics of bamboo make it possible to use it in complex architectural forms’ creation.
Synthesis of virtual reality technologies and design
Authors: Vishnevskaya E V , Strekalova N B
Published: February 2021

The article examines the phenomenon of synthesis of virtual reality and the design of a digital environment and possible areas of its application. The main terms and definitions are given. The historical background of the development and formation of virtual reality technology is given. The main technologies providing design means and virtual reality technologies’ interaction are described. The theoretical basis for the interaction of virtual reality technologies and design tools, such as visualization and image creation techniques, is considered. A design solution for using virtual reality technologies in design as a method for solving design and artistic problems is presented.
Features of the Kuban life environment historical formation
Authors: Subbotin O S
Published: February 2021

The specificity of the Kuban settlements‘ historical formation is considered in the context of regional peculiarities, as well as the folk traditions and customs of the peoples inhabiting the indicated territory. The main socio-economic prerequisites for the living environment formation in the settlements are indicated. Much attention is paid to the historical settlements of the Kuban, the objects of cultural heritage, their preservation and restoration. The specific planning structure of the settlements and regional identity in the constituent territories‘ diversity of these settlements are noted. Attention is focused on the settlement structure, on its formation over a long historical period of architectural and urban development. The following features have been proven: historical continuity, the transfer of cultural values, folk traditions from generation to generation.
Fractality and urban environment
Authors: Mayatskaya I A , Yazyev B M , Yazyeva S B
Published: February 2021

The article considers a very interesting trend in architecture, which uses fractal geometry in the complex structures‘ design. Architectural bionics gives a possibility to find the most unusual in shape and structurally optimal building structures. If earlier the architects got their inspiration from natural objects, then modern designers also use mathematical methods, for example, fractal geometry.
Lightweight concrete based on crushed foam glass aggregate
Authors: Bessonov I V , Bulgakov B I , Zhukov A D , Gradov V A , Ivanova N A , Kodzoev M-B Kh
Published: February 2021

Increased requirements for energy saving in the operation of buildings and structures, as well as the need to adjust the raw material base, presupposes the development and improvement of lightweight concrete technologies, including the use of effective lightweight aggregates, which include granulated foam glass. The goal of the study was to develop a method for selecting the composition of lightweight concrete with foam glass gravel as a large aggregate and foam glass powder as a fine aggregate. To achieve this goal, an experiment was carried out to optimize the composition of lightweight concrete and determine the optimal proportions of the used fractions of foam glass gravel. The raw mix for producing lightweight concrete included the following components: Portland cement, foam glass gravel (mixture of fractions), glass powder (crushed foam glass gravel of 0.315 mm in size), soda glass, super plasticizing admixture, air-entraining agent and water. As a result of the implementation of the experiment and the use of the apparatus for mathematical planning, processing and optimization of the data obtained, the optimal costs of main components were established, as well as the proportions of the content of coarse aggregate fractions.
On the problems of controllability and uncontrollability for some mechanical systems described by the equations of vibrations of plates and beams with integral memory
Authors: Romanova A V , Romanov I V
Published: February 2021

Controllability problems for some models of plates and beams with integral memory are considered. The vibrational equation of the plate contains an Abelian kernel in the integral term, and the vibrational equation of the beam contains a continuous kernel consisting of a finite sum of decreasing exponential functions. It is proved that by controlling the whole domain, the first system cannot be driven to a state of rest, and for the second system, controllability to rest is possible.
Application of photogrammetric methods in architecture, construction and land management
Authors: Tsoraeva E N , Gadzhiev R K , Kuchiev S E , Pekh A A , Mezhyan S A
Published: February 2021

One of the important tasks is the photogrammetry application study in construction with the aim, namely, to determine the engineering structures‘ deformations, to study the engineering structures‘ models and to solve other problems. With the use of modern technologies, it is possible to make photogrammetric surveys of buildings and structures using certain methods of performing these works. Photogrammetry plays a significant role not only in architecture, construction and land management. Photogrammetric methods make it possible to solve some applied problems directly from the images economically and fairly accurately, for example, to measure the terrain areas, determine their slopes, obtain quantitative characteristics of erosion processes, and perform vertical planning with the determination of the earthwork amount. In the article, the main goal is to consider the implementation of architectural and construction measurements for the purpose of reconstruction and restoration of buildings, as well to complete visualization of the area of interest, performed using photogrammetric methods on the basis of aerial photographs. The analysis made allows us to conclude that both classical and modern digital photogrammetry can be used in architecture, construction and land management.
General methodological foundations of measurement accuracy control
Authors: Gubeladze A R , Yagovkina E N , Gubeladze I O
Published: February 2021

The article discusses the issues related to quality control of the construction of engineering structures, the approach to the accuracy of performing geodetic measurements at the current pace of construction and installation work, as well as during operation.
Investigation of the process organization of identifying an invalid test during construction expertise
Authors: Mischenko V , Sergeev Yu , Sergeeva A , Myasischev Yu , Myasischev R
Published: February 2021

This article discusses the mechanism for studying the functional position of building structural units of a structure and identifying symptoms if there is a suspicion that the identifier influencing the building structure destruction was determined incorrectly. Approaches to determining the degree of damage to a building structure can use the methods based on mathematics and statistics. Calculated determination of a building structure failure degree cannot replace an expert-civil engineer, but provides significant assistance to him. The paper discusses the mathematical methods for determining the building structures‘ failure degree from both mathematical and technical points of view. Defect dynamics trend in a building structure in time is taken into account - a cardinal indicator when establishing the problem of finding the amount of working capacity loss. The stochastic methods of probability theory used with the fund recuperation of information about the work carried out to restore the building structures and their return to a working state provide a high level of determining defects in building structures. It has been proved that the policy of choosing a further examination reduces the total number of the studies performed, as well as reduces the examination duration, the moment of establishing the destruction degree determination of the building structure, which is important in some cases. The developed algorithm reduces the subjective moment both when establishing further examination and when determining the destruction degree of a building structure.
Engineering in modern construction
Authors: Romanenko E Yu , Vodolazskaya N V
Published: February 2021

The article highlights the issues related to the quality assurance of products and structures manufactured by the building complex subdivisions. The problems of this type complex objects‘ engineering are revealed, and an assessment of the technological production features as a sequential, interdependent process is given. The article considers the introduction effectiveness of the innovative technologies with digitalization elements in the process of manufacturing the reinforced concrete products and structural elements and the construction of buildings and structures on their basis, as well as the importance of engineering in modern construction in general. Based on the theoretical analysis, the recommendations for the use of engineering methods for reorganizing a business process with the controlled parameters technological operations and with the established quality indicators for the finished products are proposed.
Improving the reliability of the truck frame, taking into account maintenance frequency
Authors: Deryushev V V , Zaitseva M M , Kundryutskov D N , Ovchinnikov O S
Published: February 2021

In this work, the reliability of the KamAZ-4308 truck frame is increased, taking into account its maintenance frequency. This brand was chosen due to the fact that it is one of the best-selling cars in Russia among the cars with a gross weight of 14 to 40 tons in 2019. A method for optimizing the value of the intervals between the planned car maintenance (MAINT) is proposed. When calculating the reliability, the problem of minimizing the amount of initial data was solved in order to reduce the experiment time, its labor intensity and the financial testing costs. As one of the options for reducing unit costs, a change in the material for manufacturing a truck frame is considered. The empirical and approximating functions of the general totality of the finite volume (GTFV) of the Tp frame of the KamAZ-4308 car service life are obtained. At a given failure rate λ = 10-7 h-1, period values τ = 10 h and cost U/C = 100 the optimal frequency of maintenance is Topt = 993 h ≈ 1,4 month taking into account the minimum technogenic risk Smin = 0,0513.
Theoretical substantiation of ensuring the machine parts’ reliability for the assigned target life
Authors: Teplyakova S V , Kotesova A A , Kotesov A A
Published: February 2021

Increasing the machines‘ reliability remains an urgent task of the world mechanical engineering, the solution of which is aimed at significantly reducing the number of the machines‘ critical, basic and other elements (parts) failures. To solve this problem, a need to move from the sample data to a general sub-total of a finite volume is indicated, the theoretical foundations for ensuring the machine parts‘ reliability for the assigned target life are formulated and the economic feasibility of increasing the machine parts‘ reliability is analyzed.
Interregional water transport cluster as a tool for economic convergence and integration
Authors: Rudskaya E N , Eremenko I A , Popova I V
Published: February 2021

The aim of the study is to develop a conceptual project for creating an interregional water transport cluster along the Don River. The presented theoretical studies have been carried out using the methods of analysis and synthesis of the existing scientific developments in the field of territorial and inter-territorial transport infrastructure organization. Observation and static analysis methods were used in practice to determine the economic connectivity level of the regions along the North-South axis of the European part of Russia. According to the study results, the following results have been obtained:

- the role of inland waterway transport as a factor of convergence and integration of regional economies, territorial consolidation on the systemic cluster approach basis to the spatial organization of the economy has been proved;

- the effectiveness of the network-centric interregional cluster formation on the cooperation principles for the passenger and cargo shipping revival along the small rivers-confluents of the Don river in order to ensure maximum transport accessibility of remote areas and the corresponding multiplier effect for the development of all sectors of the economy has been substantiated;

- the idea of forming and maintaining a mega-regional ecosystem along the North-South axis along the Don River on the basis of dredging consequences’ interregional monitoring, as well as the formation of water tourism embedded cluster along the rivers of the Don basin has been proposed.
Geological information database integration into a geographic information modeling system
Authors: Kanukov A S , Ivanov P G
Published: February 2021

The article is devoted to the geological information database integration in the Vladikavkaz city into a specially developed system of geoinformation modeling. With the high technologies’ development, various geographic information systems designed for collecting, storing, analyzing, and graphically visualizing spatial data and the related information about the objects represented in GIS have become widespread. A map of the engineering-geological zoning of the Vladikavkaz city territory has been created at the Geophysical Institute, covering the issues of the geological structure, hydrogeological conditions, lithology, morphology, tectonics and the distribution of various types of soils in the territory under consideration. There are areas on the territory characterized by different depths of pebbles or thicknesses of clay and loam on pebbles, which is the main parameter that determines the seismicity category according to Building Codes and Regulations-II-7-81*. Based on the physical and mechanical properties‘ analysis, the reliable differentiation of soil groups with various determining indicators characterizing the soils‘ category by their seismic properties has been carried out. This information is collected in a database of geological information generated in the form of a shape file with spatial reference of each well. The developed database is used as a basis in the geographic information modeling task. Based on epyopen source software, the integration of the geological information database in the Vladikavkaz city into the geographic information modeling system has been performed.
Improvement of environmental and economic indicators of the electrolytic chromium plating process
Authors: Moskvicheva E V , Timofeev A G , Sidyakin P A , Chernoshchekov L N
Published: February 2021

In most cases, the improvement of technological processes is a beneficial measure to reduce anthropogenic impact of production on the environment. However, it is impossible to solve the problem of elimination of production emissions and wastes only by improving the technological process. That is why more and more integrated and complex measures are required to solve the problem, which include both improvement of technological processes and improvement of emissions purification schemes, waste utilization and recycling. At the same time, the measures should be both technically effective and economically feasible. The obtained results allowed to draw a conclusion about the increase of ecological and economic indicators: decrease of toxic chromium anhydride wear and tear by 2-2,7 times; decrease of water volume polluted in the process of technological cycle; decrease of expenses for lead anodes manufacturing and human resources; increase of operational characteristics of manufactured parts - wear resistance, microhardness.
Study of the dispersed composition of dust particles on the leaves of apricot trees (Prúnus armeníaca) in the residential area
Authors: Glinyanova I , Azarov V
Published: February 2021

The authors investigate and analyze the dispersion composition of dust particles on the leaves of apricot trees (Prúnus armeníaca) in the residential area of the Sredneakhtubinsky district of the Volgograd region near industrial enterprises in comparison with the dispersed composition of dust on the leaves of apricot trees (Prúnus armeníaca) growing on the territory in a conditionally clean zone (control) in the absence of anthropogenic pressure from industrial complexes in the SNT “Oroshenets” (Volgograd, Sovetsky district). The research points in the residential area were taken on the territory of social facilities (boarding school, hospital, kindergarten) and low-rise residential areas. The research material is the leaves of apricot trees (Prúnus armeníaca) in the residential area of the Sredneakhtubinsky district of the Volgograd region and in the SNT Oroshenets, Volgograd, Sovetsky district (conditionally clean zone, (control). Research methods: washing off dust from leaf blades into a glass with distilled water, filtering the suspension through an AFA-VP filter, obtaining a filtrate, natural drying of the filtrate at a temperature not higher than 30-40 ° C, placing the dried filtrate on a glass slide of an optical microscope, making measurements of dust particles, dust processing, study of the dispersed composition of dust (according to GOST R 56929-2016). Areas of environmental risk have been identified, these are the territories of a kindergarten, a hospital and other low-rise residential buildings, as well as places that are safe for the population (boarding school, etc.). These studies indicate environmental pollution, in the future, it is required to determine the chemical composition of dust particles and identify sources of pollution and take environmental measures.
Clustering and its key features’ formation in construction
Authors: Ischenko A V , Shishkunova D V , Guryanov N P
Published: February 2021

The purpose of this study is to substantiate the terminology “Clustering in construction” used in the regulation of construction organizations in a single system of interaction, taking into account the organizational and technological model of the new and existing buildings’ formation reliability. When implementing such projects, a set of joint tasks of the organizational and technological configuration is outlined and a number of indicators (comfortable housing with deliberately used free space; a combination of residential development with other objects of social, educational and entertainment infrastructure) are taken for consideration, as well as the basic principles of organizational and technological clustering criteria in construction. The most important scientific theory is that with the use of cluster modeling methods, competitiveness indicators can be increased, the range of material and technical base of construction production can be increased, and the investment durability of the construction organization can be formed. As a result of the study, the characteristic properties of the construction cluster were established for use in an integrated model.