bluuebunny/crossref_metadata_2025 huggingface dataset:
Subscribers’ Traffic Internet Bandwidth Usage Capture and Classification Using Android Platform
Authors: Adewale A A , Ben-Obaje A , Ekong E E , Orimogunje A , Anabi H K , Omoruyi O
Published: December 2019

With the rise in smart devices communicating on internet, there is a huge demand in the delivery of internet bandwidth to fulfil subscribers’ aspirations. It is therefore important for internet network providers to understand the subscribers’ behavioural pattern in terms of internet bandwidth usage so as to meet up with the continuous rise in its demand. This research introduces the schematics of an android application effectively communicating with a remote database; Firebase cloud service. The classification of the subscribers’ internet traffic bandwidth consumption enables the android application to generate dataset of bandwidth utilization patterns of volunteered subscribers’ device which are grouped into 4 classes; A, B, C and D representing very high, high, medium and low data usage respectively. The collection of internet bandwidth usage of subscribers was recorded at intervals of every hour into the remote database in Firebase cloud.
Alcohol dehydration of palm sugar (Arrenga pinnata) from Lalolae Village, East Kolaka, Southeast Sulawesi
Authors: Permana D , Ilimu E , Kadir L A
Published: December 2019

This research aimed to obtain ethanol from fermented palm sugar with high purity. There are two main techniques used in this study to increase the purity of alcohol, namely modified multilevel distillation and the use of molecular sieve as the principal dehydrator agent. The process carried out to produce ethanol uses a distillation and dehydration process, with raw materials fermented using Saccharomyces cerevisiae and traditional technology. At first, prepare two column reflux distillation apparatus had been designed and constructed successfully to prepare bio ethanol. The sugar content of palm sugar used was 12.4%. Bioethanol is produced from 10% inoculum concentration and variations in fermentation time of 12 hours, 24 hours 36 hours, and 48 hours at pH 5. The results of measurement using alcoholmeter, the highest alcohol concentration was obtained at the condition of 36 hours fermentation time by 9%. The distillation and dehydration process is carried out continuously at a distillation temperature of 79 °C with a mass of 20 gram molecular sieves. The results of measurement of alcoholmeter obtained bioethanol levels of 54%.
Inheritance study for fruit characters of tomato IPBT78 x IPBT73 using joint scaling test
Authors: Mustafa M , Syukur M , Sutjahjo S H , Sobir
Published: December 2019

The Increase of tomato production can be done through the improvement of superior genotypes that have high production components even though they are planted in the lowlands. Information on components inheritance of tomato production in the lowlands is very important to determine the effective selection method for the development of lowland tomatoes. This study aimed to study the pattern of components inheritance of tomato products in the lowlands. This study used an analysis of six generations, namely P1, P2, F1/F1R, BCP1, BCP2, and F2 through a joint scaling test. The results showed that the characters of fruit length, fruit diameter, fruit size, weight per fruit, fruits number per plant were controlled by many genes, and there were no maternal effects. Gene action for fruit length character was duplicate epistasis and additive dominance, for fruit diameter characters were additive dominance and complementary epistasis, duplicate epistasis and additive dominance for fruit size characters, duplicate epistasis for per fruit weight, several fruits per plant and fruit weight per plant.
Analysis of mercury and nickel content in fish and shrimp a result aquaculture of ponds in Pomalaa, Kolaka Regency
Authors: Syahrir  , Yaqin K , Landu A , Tambaru R
Published: December 2019

The Nickel Mining Industry in Pomalaa, Kolaka Regency, Southeast Sulawesi has been operated since 1909. In its development, mining activities have begun to cause problems, namely pollution and environmental damage. Research on metals around the nickel mining waters has been done by taking samples of milkfish and shrimp which are cultivated by the community in ponds. The metal analysis was carried out using AAS (Atomic Absorption Spectrophotometer) variance AA50. The presence of mercury metal in fish samples (B6) and shrimp (U40 and U50) was not detected, but was found in fish samples (B2 and B4), and shrimp (U30) with the contents of B2 each at 7.0510+0.77 mg/kg, B4 of 2.0700+0.12 mg/kg, and U30 of 4.6560+1.04 mg/kg. Based on SNI7387:2009 (The maximum limit of mercury contamination in food) is known to fish and shrimp as a result of the cultivation of these ponds has undergone mercury metal pollution. Nickel is found in all types of samples, both in fish and shrimp. The value of nickel metal content in fish (B2 is 0.5000+0.11 mg/kg; B4 is 0.5000+0.11 mg/kg; and B6 is 0.5000+0.17 mg/kg). While the nickel content in shrimp (U30 is 1.1550+0.51 mg/kg; U40 is 0.7650+0.17 mg/kg; and U50 is 0.6650+0.17 mg/kg). For nickel content, the values referred to as standards are WHO Regional Office for Europe, Copenhagen, Denmark, 2000 Air Quality Guidelines, Chapter 6.10 Nickel - Second Edition. Concerning these standards, it was found that fish and shrimp from aquaculture ponds in these locations had suffered nickel metal pollution.
Engineering method for calculating the slab foundation of a high-rise building in difficult geological conditions
Authors: Degtyarev V G , Safronova T I , Kozhenko N V , Molotkov G S
Published: December 2019

When designing objects in complex engineering and geological conditions, it is necessary to use a specialized geotechnical software package allowing to take into account the foundation soils nonlinear properties, as well as the specific occurrence of geological elements, since the current RF standards only take into account the nonlinear properties of the foundation in a simplified form.
Nonlinearity account in the foundation soils when calculating the piled rafts of buildings and constructions
Authors: Degtyareva O G , Safronova T I , Rudchenko I I , Prikhodko I A
Published: December 2019

Non-linearity account of the soil at a geotechnical calculation allows looking after the plastic strains in the overstress places.
Consolidation processes in clay soils, taking into account the multistory building construction staging
Authors: Degtyarev V G , Kozhenko N V
Published: December 2019

The presence of soils, subjected to consolidation, increases the risk of the additional sediment formation, which may affect the object stability in the base.
Taking into account the influence of the centrally symmetric thermal field on the stress state of a inhomogeneous rock mass with a spherical cavity
Authors: Frolova I I
Published: December 2019

The problem of calculating the stress-strain behavior of a rock mass in the vicinity of a spherical cavity, taking into account the radial inhomogeneity of the rock material mass is considered. The solution takes into account the technological inhomogeneity of the soil and the inhomogeneity caused by the influence of the thermal field. The axially symmetric problem of determining the stresses and displacements was solved with a joint action of an asymmetric load (ground reaction) and hyper-thermal fields on the rock mass. Similar problems tend to arise during the creation of underground cavities and their exploitation for storing various self-heating products. To solve the initial simultaneous equations in displacements, the Fourier series of Legendre polynomials were used. Then by the separation of variables, the problem was reduced to 2 ordinary differential simultaneous equations with variable coefficients, which can be solved numerically.
Promising technologies of dry low-rise housing
Authors: Verzhbovskiy G B
Published: December 2019

The technologies of low-rise housing construction with the use of small blocks of a special type, which make it possible to build the above-ground part of a building without using “wet” processes are described. It is shown that the presence of labyrinth grooves in the walls provides protection against blowing and makes it possible to ventilate the internal cavities.
Stabilization and stiffening of unique longspan bridge transport constructions
Authors: Shumeyko V I , Karamysheva A A
Published: December 2019

The article deals with the unique systems of longspans, gives examples of such constructions in Russia and abroad, as well as the main periods of their development history. Particular attention is paid to accidents and disasters that took place at various times. Based on the analysis of suspended and cable-stayed systems’ destruction, the main causes of damage are investigated and systematized, which is a very important element in ensuring the security of unique longspan systems. Recommendations are made on improving the stabilization and stiffness of bridge constructions.
Investigation of fine dust pollution during hard and soft works in warehouse complexes
Authors: Strelyaeva A B , Kalyuzhina E K , Lupinogin V V , Alkneume M Kh A
Published: December 2019

The dust dispersed composition in various types of hard and soft works is under study. The dust emissions indoors concentration data is obtained. The dust concentration on distance dependence is constructed. The impact assessment of hard and soft works in warehouses and residential premises on environmental pollution by dust emissions is given. The concentration and ratio of PM2.5 to PM10 particles were calculated in order to determine the dustiness and the negative impact on the environment.
The conditions of bulk clay soil compaction
Authors: Lyashenko P A , Denisenko V V , Kovalenko V S , Kolomiets N S
Published: December 2019

Testing of bulk clay soil with static cyclic loading was carried out in order to determine the required number of loading-unloading cycles to achieve a standard soil compaction at a given humidity, as well as to assess the content of bound water. Several samples of different moisture content of the dust loam in the compression device were tested by applying pressure in one stage and unloading with the measurement of deformation of the compaction and expansion of the soil sample. The number of cycles of the test soil samples was limited to the stabilization of the values of the coefficient of the elastic deformation work, the same for all samples of different moisture. Here proposed method of selection of the elastically deformable water and water involved in the inelastic deformation as a phase state of aggregation of the soil. Calculations of the volume content of mineral particles in the soil, elastically deformed water and water involved in inelastic deformation of the sample are made through the coefficient of elastic deformation. It is found that with increasing the density of the soil volume content of mineral particles and the elastically deformable water increases and correlates with the dry density of the soil and the volumetric water content involved in the inelastic deformation of the sample virtually unchanged.
The incompressible pile draft and bearing capacity when interacting with surrounding and underlying soils, taking into account their linear and elastic-plastic properties
Authors: Ter-Martirosyan Z G , Angelo G O , Ter-Martirosyan A Z
Published: December 2019

The article presents the formulation and solution of the interaction problem of a long incompressible pile with a two-layer base, taking into account the linear and elastic-plastic properties of the surrounding and underlying soils and when interacting with the pile cap by an analytical method. The studies show that the interaction with the surrounding soil involves a limited amount of soil mass in the form of a thick-walled soil cylinder containing a pile.
The bearing capacity of the explosive piles’ bases: geotechnical design of rational structures
Authors: Borozenets L M
Published: December 2019

The material of the scientific work is presented in two articles: “The bearing capacity of the explosive piles’ bases: the bases granular media geomechanics theory” and “The bearing capacity of the explosive piles’ bases: geotechnical design of rational structures”. The results of the latest innovative achievements in the field of pile foundation engineering are summarized. The explosive single piles-foundations rational designs development of geo-engineering design scientific and technical problem integrated solution relevance is grounded. The goal and objectives of the scientific research are set. The main content of theoretical and practical research is represented by a full demonstration of the scientific results obtained. Geotechnics is based on methodologies that include the computational-theoretical research knowledge geomechanics and methods theory provisions. The proposed geotechnical design of rational designs of explosive single piles-foundations makes it possible to determine their design dimensions from the bases’ bearing capacity values equal to the critical load on the pile.
Evaluation criteria of loess soils subsidence
Authors: Chernysh A S , Kalachuk T G , Shirina N V
Published: December 2019

Construction on subsidence soils has some features that are taken into account when developing projects. Design and construction works are regulated by a number of regulations. However, subsidence soils have not only common properties and similar characteristics, but also have noticeable differences due to the territory of formation, genesis, climatic conditions and other factors. The article presents the experimental data analysis on the land subsidence soils evaluation criteria choice. When wetting loess subsided soils, the cohesive force is subjected to a significant change, which determines the soils strength, and the angle of internal friction plays a minor role. When humidity increases their values decreases slightly. This feature was assumed as the basis for substantiating the new subsidence criterion, as well as for developing a classification of loess soils according to their subsidence.
Economic effectiveness of traditional building materials in modern conditions
Authors: Alpatov V Yu , Atamanchuk A V , Balzannikov M I
Published: December 2019

The article studies the effectiveness of different materials usage in building structures. Specific researches and estimates have been done to complete this study. Economic usage indicators of materials with different properties for creation of identical building structures were compared. Impact of the following material properties such as strength, elastic modulus, weight and cost on the construction cost was estimated. Rafter construction was selected as a study object. Calculations examples of rafter constructions made of wood and steel are described in the paper. Material properties impact on operational characteristics of the building structures was estimated. Variant design and optimal design of constructions made of materials that properties considerably differ were reviewed. Variant design example used in the building practice was described.
Determination of optimal thermal insulation layer thickness of outer structures of buildings according to the load of heating and cooling system
Authors: Petrosyan A L
Published: December 2019

One of the key energy efficiency measures in residential buildings is to reduce the load on heating and cooling when in outer structures such as walls and ceiling a thermal insulation material is included in order to reduce the losses caused by heating and cooling, air and moisture penetration. It depends on the climate zone of the building, structural construction, heat and cold sources, prices for fuel and electricity in that region. It can be different in every specific case, so it is of high necessity to determine the optimal thickness of the used thermal insulation, the location of the installation. Below are the features and the need to introduce thermal insulation in newly constructed and operated buildings. The influence of the presence of thermal insulation in the construction industry on the cold load necessary for cooling and the pattern of changes in the cost with and without the presence of thermal insulation was investigated.
Creep salt array with a cavity
Authors: Andreev V I
Published: December 2019

The problem under consideration is connected with a technological problem creating cavities with camouflage explosions. Often these cavities are created in an array of rock salt [1, 2]. In rock salt even under light loads pronounced rheological properties appear, solution of the problem is of interest about creep of salt massif with cavity under the action of both power loads (soil pressure) and temperatures. As a result of the calculation, stress plots for various points in time are obtained, as well as displacements.
Modeling of internal efforts in the beam with moving load in MathCAD system
Authors: Kudryavtsev Y , Gavrilenko A
Published: December 2019

The article describes the processes of analytical, numerical and computer modeling of the internal forces in any beam section, depending on the location of the moving load. Such calculations are quite laborious and are widely used for the calculation of many structures under the influence of moving loads (beams and trusses of bridge and gantry cranes, road and railway bridges, etc.). As a result of the study, a complex has been developed: analytical models, numerical and computer algorithms and programs that allow to effectively determine the internal forces in any beam section depending on the location of the moving load. The proposed procedures for modeling internal forces in any cross section of a beam under the action of a moving load can reduce the time and cost of performing such studies by several orders of magnitude and effectively conduct the research when the beam parameters change, including the materials from which the beam will be made.
The study of species composition of the mycoflora, selected surface samples poliferation composites in humid maritime climate
Authors: Erofeev V T , Smirnov V F , Myshkin A V
Published: December 2019

Abstact. The results of the study to establish the species composition of microorganisms settled on samples of polyether-acrylate composites after they are kept in sea water and in climatic conditions of the black sea coast are presented. The composition of the curing system in the composite and the conditions of holding the samples have a significant effect on the species composition of microorganisms.
Organizational and technological stages of the forensic construction and technical expert examination when determining the compliance of a building facility with regulatory and technical documentation
Authors: Zilberova I Y , Mailyan V D , Mailyan A L
Published: December 2019

According to the results of studying the modern theory of forensic examination, as well as the practice of appointing and conducting the forensic construction and technical expert examination during the proceedings in the most scaled and significant economic disputes of economic entities, issues related to the absence of development of organizational and technological stages of the forensic construction and technical expert examination in determining the compliance of a construction facility with regulatory and technical documentation were identified.

The paper describes the organizational and technological stages of the forensic construction and technical expert examination, which will provide a rational solution to the most common forensic issues in practice. The description of the stages is brought up to the methodological level of construction and technical research. The generalization of the results of the application of this proposal by the forensic expert-builder forms the basis for the development of methodological recommendations for the forensic construction and technical expert examination on the issues of determining the compliance of a construction facility with the regulatory and technical documentation.
Analysis of Iraq housing policies as a relationship between design and economy
Authors: Al-Shaibani A A , Popov A D
Published: December 2019

The Iraq policies of National Housing have been working for a long time to develop the possible solutions to the problem of obtaining housing for all Iraq families. However, these policies have not achieved their objectives in the desired manner. The problem of housing in Iraq has become one of the most important problems facing urban development in this country. The study is based on a theoretical framework for housing, which adopts the most important economic and normative characteristics to be followed to achieve the development of the housing sector in Iraq to the cases of institutionalization, and through the four criteria: the size of the housing unit, the level of family income, the system of borrowing required, the ownership to achieve adequate housing for all levels of society that have shown willingness to cooperate and participate in reaching these goals.
The major cities quality urban environment forming features
Authors: Baklazhenko V V , Vovzhenyak P Yu , Pavlovskaya E E
Published: December 2019

The article discusses the currently relevant problem of the quality urban environment, which, as the study has showed, has its own dimensions and characteristics for each person, and the specialists in different fields of knowledge disagree with it and include various indicators and criteria while making a quality assessment. After analyzing the previously developed methods and criteria for assessing the quality of the urban environment, some basic criteria characterizing the degree of suitability of territories, the factors influencing its formation, and the provisions characterizing it, have been formed. The authors proposed several main directions of the large cities’ territory development as well as the recommendations for the urban space design and improvement.
Optimization of planning of territorial systems in the context of strategic tasks of advanced development
Authors: Yushkova N G. , Dontsov D G , Gushchina E G
Published: December 2019

The human life environment formation is carried out in the context of the sustainable spatial development current paradigm. When implementing this paradigm, the vectors directions are taken into account: inertial development and advanced development. The novelty of the research lies in establishing the definition dependence of the general concept, methodology, toolkit on the direction of these vectors under the uncertainty conditions in the external factors appearance. Formed aggregate is a condition for the development goals achievement by territorial systems. The advanced development model accompanies the territorial systems polarization processes. Its development is associated with the justification and formalization of priorities, types, forms and the socio-economic activities promising types spatial organization features. It has been established that localization effects are characterized by the activity spatial consolidation certain methods in strictly fixed points of the territorial system. The innovation factors complex impact transforms the existing methodology and improves the traditional methods of functioning territorial entities reorganizing. As part of this study, the directions for optimizing territorial systems and increasing their controllability are justified by integrating space digitalization processes into the production intensive type implementation. The territorial systems optimization presented method reveals the principles of forming the mechanism of advanced multi-level adaptation within the territorial systems management developed concept framework.
Analysis of the accidents causes at different stages of the construction object life cycle
Authors: Lapina A P , Akay O M , Danilova-Volkovskaya G M , Ponomarenko A V , Shentsova K V
Published: December 2019

The article discusses the main causes of accidents of buildings and structures having occurred due to the errors made at various stages of their life cycle (design, construction, operation). A brief analysis of the accidents that occurred within the period from 2010 to 2017 in the Russian Federation is presented. The examples of accidents in construction due to underlying causes and the ways to prevent those accidents in future are considered.
Architecture-design support implementation of the strategy socio-economic development the urban district
Authors: Polyakova O M
Published: December 2019

Strategies for the perspective development of regions, urban and rural districts are developed taking into account the general characteristics of the achieved level of socio-economic development, agreement, evaluated, clarified with the use of social surveys. When implementing strategies, it is actual increase investment attractiveness of the region, attracting and conservation workforce potential, development of scientific-production complexes, tourism cluster. Implementation of the strategy of socio-economic development of the city district of Togliatti, Samar region of the Russian Federation until 2030 is provided with the use of technologies of architecturally- design aimed at the development of the cultural environment, the improvement of public areas, renovation, improvement of cultural environment, the development of the information environment. Examples of relevant design decisions in the listed directions, in relation to the allocated objects of the city district of Togliatti are given.
Innovative technologies of sculptural and applied activities in bachelor-architects training
Authors: Zakharova N Yu , Vlasova I M , Protopopova I V , Lukyanov R L
Published: December 2019

The environment architectural and artistic appearance forms interrelations with the buildings cultural space organization, the sculpture and sculpture compositions presence problem in the urban environment perception are considered. The architecture future masters’ creative development by means of sculptural and applied activity is analyzed.
Place dependence as the physical environment role function in the place attachment
Authors: Alrobaee T R , Al-Kinani A S
Published: December 2019

This research sheds light on the physical environment role in creating the place attachment, by discussing one of the important factors in the attachment creation, it is the concept place dependence, consisting of two important dimensions: the place quality and the place expectation; they contain a number of the supporter physical environment sub-indicators for place attachment. Eight physical indicators were reached; they were found to have a close relationship to the place attachment, including: the open and green spaces existence, land use diversity, diversity of housing types, dwelling / population density, accessibility, transport network development degree, transport multiple modes, and continuity of place over time. The presence of these indicators has been tested in the center of Nasiriyah city in the South of Iraq.
Creative thinking development value in the bachelor-designers training
Authors: Zakharova N Yu , Protopopova I V , Shepilova V A , Likhovid Yu G
Published: December 2019

The relationship of learning and development in a creative environment, the process of formation of creative subjectivity are considered in the article. The creativity development, the creative type creative activity methodological conditions, the creative type artistic activity principles, the reality sensory-perceptual reflection in the creative development thinking context are analyzed.
Architectural and spatial organization of fortified settlements in Western Alania
Authors: Treyman Julia
Published: December 2019

The article is dedicated to the medieval settlements architectural peculiarities revealing in Western Alania. These settlements were situated in the river ravines in the Karachay-Cherkessia territory. According to the planning criterion two types of settlements have been revealed: traditional and contaminated. The traditional type was formed during the pre-Christian period. Its three-part structure was the universe mythological model spatial manifestation. The contaminated type appeared during the Christian period. The peculiarities of its architectural and spatial organization are connected to the fact that its planning structure developed according to the byzantine Christian city scheme with the traditional Alan culture understanding. These types developed following the fortified settlement pattern, whose planning structure consisted of a citadel, a fortress and a fortified hillfort, but both types had different fortifications. According to the fortification criteria and the location in the landscape the above-mentioned types are united within a group of three kinds fortified settlements: the main fortresses (the vanguards), naturally protected settlements and guarded settlements (cultural and ideological centers, trade and craft centers).
The manifestation of fractality in the architecture of buildings and structures
Authors: Yazyeva S B , Mayatskaya I A , Kashina I V , Nesterova A N
Published: December 2019

The article shows the presence of proportional correspondence of the parts and the whole using the principles of fractal geometry in the natural objects and phenomena beauty concept formation. The objects of the artificial environment are studied for the formation of images using the mathematical models’ example for calculating natural objects with fractal properties.
Light rangefinder of “0” class
Authors: Hayrapetyan Ye H , Petrosyan H S , Hunanyan H A
Published: December 2019

When the light-emitting diode meter is operating in the middle linear region of the light modulation characteristics in the microwave range, photodetectors of the photoelectron multiplier (PMT) type do not restore changes in the demodulated signal depending on the distance. The solution of this problem using optical frequency conversion by introducing a second identical modulator at the second frequency is considered. According to this principle, the functional construction scheme of a rangefinder "0" class is proposed, the accuracy of which is estimated to be mφ = 0.01-0.02 mm.
Influence of mass repatriation factor of Armenians in the first half of the 20th Century on the formation of spatial and planning structure of Yerevan
Authors: Aloyan A A , Harutyunyan E P
Published: December 2019

The article deals with the management of the process of development of the planning and spatial structure of Yerevan, taking into account the factor of mass repatriation of Armenians 20-70th. The specificity of territorial and planning development of the city at different stages of rapid development is analyzed. Data on mass repatriation of Armenians and their resettlement are given. The compositional and planning principles and features of the formation and territorial organization of residential settlements and areas for returnees, which later became the most important planning parts of modern Yerevan, are considered.

The provisions and principles outlined in the report can be useful in the study of various aspects of the architectural and spatial development of Yerevan and can be used at all stages of design related to the prospect of further architectural and planning formation of urban systems of Yerevan.
Geodetic control in construction of steel roof structures
Authors: Bikbulatova G , Kupreyeva E
Published: December 2019

The article presents a complex of geodetic works conducted at construction of steel roof structures of the scientific and educational centre “Primorsky Aquarium” (Vladivostok, Russia). It is supposed that geodetic executive survey of constructed buildings is important. Monitoring and control are performed during every stage of construction process (excavation and foundation work, design of gridlines plan) as well as after finishing. Geodetic executive surveys are aimed to timely correction of conducted works for the quality construction of the subsequent elements. These surveys should be conducted regularly and they are often called current executive surveys. After conducting of construction works according to the definite technology and requirements to construction tolerance the final executive survey of the building and its general plan are made.
Geodetic deformation monitoring in the dam-reservoir system
Authors: Al Fatin H J , Mustafin M G , Ismael H S
Published: December 2019

Construction of hydraulic structures is considered to be one of the useful and long-term solutions to most of socio-economic problems that are faced by our societies in the 21st century. With regards to this, it is therefore necessary to constantly monitor the steady state of the dams in order to optimize the operational efficiency and safety measures for both the ecosystem and human beings. Existing methods for monitoring the state of dams are based on observing deformations dams as an independent object. The article discusses the method for estimating dam deformations in the dam-reservoir system. When conducting geodetic monitoring of dam’s displacement, it is necessary to take into account the water level in the reservoir which affects the measurement procedure and makes them more physically reasonable, taking into account the water pressure on the dam. The article shows the method of measuring the water level of the reservoir based on the construction of its 3D model.
Atmospheric electrical profiles in the surface layer depending upon significant factors
Authors: Petrova G , Panchishkina I , Petrov A , Chkhetiani O
Published: December 2019

Processes of electric characteristics vertical profiles formation in atmospheric surface layer are analyzed on the basis of measurements results of summer expeditions performed both in the recent years (2012 - 2017) and during earlier periods, mainly at the territory of the Don steppes. The most important among approaches, on which the performed research is based, is the complex character of measurements. The most significant parameters for electric processes in the atmospheric surface layer are monitored alongside with the atmospheric electrical characteristics. The paper discusses formation mechanisms of the observed types of atmospheric electrical conductivity profiles with consideration of radon-222 volumetric activity and mixing processes in the surface layer.
Rocket investigation of electrical characteristics of the thunderstorm clouds
Authors: Mashukov Kh Kh , Zekoreev R Kh , Kambiev M M
Published: December 2019

The description of the equipment used according to the program of rocket sensing of electrical characteristics inside thunderstorm clouds in the Caucasus, with which the profiles of the three components of the electric field intensity in the cloud were measured, taking into account the influence of electrification currents flowing on the rocket probe in the thundercloud and the electric charge accumulated on it, is given. The coordinates of the trajectory of the sounding of the thunder cloud were measured and tied to the synchronously recorded radio echo of this cloud. Much attention was paid to justifying the reliability of measurements when creating a rocket probe. The description of one experiment on rocket sounding of the thunderstorm cloud is given as an example.
Universal data acquisition system for monitoring environmental characteristics
Authors: Grunskaya L V , Zolotov A N , Bushuyev A S
Published: December 2019

The developed monitoring system allows for the collection of data, their storage, remote viewing of data, processing of experimental data. Unlike the existing monitoring systems, our system is portable, mobile. The development of the system was carried out on the basis of the existing complex, which was stationary like the most of the monitoring systems. Remote access to databases allows you to analyze the results of monitoring remotely and to adjust the characteristics of the system.
Feedbacks between lightning activity, temperature and composition of the atmosphere
Authors: Kolomeets L , Smyshlyaev S P
Published: December 2019

The prediction of lightning-generated nitrogen oxides in the troposphere and low stratosphere is evaluated using the Weather and Research Forecasting model coupled with Chemistry (WRF-Chem) with nested grid spacing of 15 and 5 km where convection is parameterized. The responses of nitrogen oxides, ozone, temperature and peroxyacetyl-nitrate (PAN) are investigated using matching of WRF-Chem sensitivity tests. A high-resolution simulation was performed for the Black sea region to examine feedbacks between atmospheric electricity and local weather. The result obtained shows that storms, occurring near the seaside, cause stronger effect on the land. Temperature fields show that continental difference is bigger than the coast one. The maximum temperature field difference is registered above 10 km altitude.
Formation of intense thunderstorms in Yakutia in periods of frequent atmospheric blocking in Western Siberia
Authors: Tarabukina L D , Antokhina O Yu , Kononova N K , Kozlov V I , Innokentiev D E
Published: December 2019

The variation of lightning strokes number in Yakutia were found to depend on the atmospheric blocking forming in Western Siberia. The correlation between total summer lightning stroke number in area of 1200 km radius around Yakutsk and frequency of atmospheric blocking in July at longitude of 70±5°E (Western Siberia) was -0.8. The total lightning number in Yakutia 1200-km radius area correlated with frequency of atmospheric blocking in July at longitude of 125±5°E (valley of Amur and Sungari Rivers) with coefficient of 0.56. The interannual variation of total lightning stroke number in Central Yakutia has been found to be linearly related to lightning activity in the eastern part of North Asia (valley of Amur and Sungari Rivers) of monsoon origin.
Optimal organization of lifting operations at the construction site
Authors: Kuleshov I , Pishchukhin A
Published: December 2019

The study is dedicated to identifying the influence of the tower crane location and its technical characteristics in panel housing construction for the duration of lifting operations. The organization of the construction site is represented by a triangle, at the tops of which a tower crane, a warehouse of panels and a place of installation are located. It is assumed that the delivery of goods is carried out separately by turning the crane and then moving the crane truck in the right direction. The computer model is described by a nonlinear trigonometric equation, the roots of which were found by the Newton method. As a result of a model study, it was found that to accelerate lifting operations, it is necessary to select a crane with a large boom reach and move it further away from the direct connecting warehouse to the installation site, achieving the isosceles of the triangle formed by the crane, warehouse and installation site, and also the minimum lifting time operation increases with decreasing angular velocity of the tower crane.
Probabilistic assessment of the buildings and structures construction duration
Authors: Mikhaylova E
Published: December 2019

One of the main conditions for achieving the set value of the buildings and structures construction duration is the construction production planning. Due to the fact that the construction process has an uncertain dynamic nature, it is recommended to use probabilistic analytical models to determine such a calculated parameter as the duration. The article proposes a probabilistic model for estimating the duration of construction of buildings and structures on the basis of the normalized Erlang's law of the n-th order. This model allows, by changing the number and duration of work lying on the critical path, to assess the construction project completion probability within the prescribed period.
Modern methods for evaluating the technical and organizational-technological solutions for repair and construction production
Authors: Zilberova I Y , Mailyan V D , Novoselova I V
Published: December 2019

The paper deals with the problems of evaluating technical and organizational-technological solutions for repair and construction production at various stages. The choice of materials and technological options is carried out using the principles of consistency and complexity. The developed system for identifying the options makes it possible to describe in general terms any technical and organizational-technological solutions for the production of repair and construction works used in the overhaul practice, and those that will appear as the repair and construction industry develops. The work defines a scientifically based formalized set of indicators describing the methods compared versions of technical, organizational and technological solutions for the production of repair and construction works during capital repairs. The effectiveness of the developed method is confirmed by the representativeness of the research results carried out on the example of the production of works on the insulation of external walls during the apartment buildings overhaul.
Improving the manufacturability of the reinforced concrete structures production by using lightweight filling materials
Authors: Andronov A V , Balakchina O L , Leonenko K A , Shalenny V T
Published: December 2019

The article shows the feasibility of improving the manufacturability of the prefabricated monolithic floors reinforced concrete structures production by reducing their own weight. In the works of the authors, the reduction of the sole weight and the cost is achieved by using the light materials filling the inter-gully space. It is proposed to use gas-concrete, polystyrene foam concrete blocks or limestone-limestone blocks as a local building material in the Crimea with such materials for the advanced system MARCO. Due to that, the cost of the interfloor overlap device has been reduced by approximately 10%. In addition, there is an additional cost reduction also due to the improved ergonomic work performance, increasing the productivity of workers by 6%. Innovative design and technological solutions are also presented, replacing the part of heavy concrete in a flat floor slab with hollow cores made of lightweight artificial materials - expanded polystyrene, polyethylene or cement wood.
Ways to reduce dust burden in treating units of fibrous by-products
Authors: Ilyina T N , Sevostiyanov M V , Emelyanov D A , Goltsov A B
Published: December 2019

The characteristic of fibrous by-products and their disposal methods is given. The scheme of the technology of pulp and paper waste processing with the production of granulated products for crushed stone-mastic asphalt concrete is presented. The analysis of the material flows of the technological complex is given. The expediency of the preliminary stage of particles micro-granulation in a pneumo-mechanical apparatus to reduce dust burden and increase the efficiency of the complex operation as a whole is shown. Two-phase flow parameters of the technological complex are determined. The aerodynamic calculation of the aspiration system of the complex before and after modernization was carried out.
The intensification of water purification plant work
Authors: Moskvichev S S , Mileshkin S I , Moskvicheva A V , Moskvicheva E V
Published: December 2019

The results of studies of the main technological parameters of the process of water clarification with coagulant based on natural mineral raw materials are presented.
Improving the purification method of circulating water in the POOLS
Authors: Gizzatova G L , Batmanov V P , Moskvichev S S , Lebedev D N
Published: December 2019

The article presents the research results of the sorption purification peculiarities of aquatic environment where surface-active substances (SAS) appear during the operation.
The results of the research on the pipelines protection from Dreissena on the water intake technological complexes of multi-purpose water supply systems for urban farms
Authors: Khetsuriani E D , Bondarenko V L , Ilyasov A I , Semenova E A
Published: December 2019

The main purpose of the Sengileevsky reservoir is currently the flow part accumulation of the Nevinnomyssky canal for municipal and industrial water supply of the city of Stavropol, the city of Mikhailovsk, Shpakovsky and Grachevsky districts, the irrigation of the river Egorlyk and the water supply regulation in the Rostov region and the Republic of Kalmykia, provision of water to the Right-Egorlyk Canal, Mezhdurechenskaya Environmental Protection Agency and incidentally, Egorlykskaya and Novotroitskaya Hydroelectric Power Station, Stavropol CPP. From the Sengileev reservoir water is supplied to the city of Stavropol and several other districts of the region, with more than 1 million people being provided with water. Water intake structures with a pumping station on the Sengileev reservoir are unique and have no analogues in Russia. Water is taken by pumps from a depth of 10 meters and then supplied by three pumping stations to a height of about 500 meters.

The water quality in the reservoir in different years mainly corresponds to classes II – III, “pure” or “moderately polluted” with a WPI close to 1, whereas in the tributaries for a number of sections the water quality may decline in certain periods to V-VI as “Dirty” and “extremely dirty”.

The main idea of the work is to use an environmentally safe technology to combat drainage, pre-purification of water in front of the sewage treatment plant and ensuring uninterrupted water supply in settlements at any time of the year.
On the air conditioning issue: the heat and mass transfer processes between water and moist air
Authors: Kalov R Kh , Balkarova S B , Kalov Kh M , Etezova M B
Published: December 2019

The variants of calculation formulas for heat and mass transfer in the convective processes, the radiant heat transfer and the mass between water and moist air transfer are given, taking into account the contribution of each of these processes. The simplified calculation formulas for the following options were obtained: the amount of heat transferred by radiant heat is insufficient or can be neglected; the heat flux transferred by convective heat exchange is not significant; mass transfer has low effect on the heat transfer.
System approach to the evaluation of a consumer appeal for the objects on the secondary housing market
Authors: Kalashnikov S Yu , Godenko A E , Kalashnikova Yu S , Tarasova I A
Published: December 2019

A real property item of the secondary housing market is presented in a form of a multilevel hierarchical structure. An overall evaluation of a consumer appeal for the object under the study is carried out in terms of the chosen key indicators of housing appraisal with an application of the theory of quality, which is based on the quasi-arithmetic functional mean proposed by Kolmogorov-Nagumo. The elaborated methodology allows customers to choose the best variant of a real property item taking into account architectural and constructive decision of a building, usage of construction and finish materials, accessibility of urban and transport infrastructures, ecological area, as well as personal preferences.
Accounting for the light climate of the city of Nalchik when calculating natural light
Authors: Guketlov Kh M , Gukov A H
Published: December 2019

The mathematical model of the light regime in the considered constructional area has been developed. The amount of horizontal outdoor natural illumination from the sky with a standard brightness distribution established by the International Commission on Illumination (ICI) was determined in the annual cycle for the cities of Nalchik and Moscow. As a result of comparing the values of the amount of illumination for the cities of Nalchik and Moscow was determined, a correction coefficient for the light climate, the use of which will improve the technical and economic efficiency of the lighting devices when calculating with natural lighting, was found.