scholarly journals Low-cement concrete dams: construction, structures and innovations

Vestnik MGSU ◽  
2020 ◽  
pp. 1018-1029
Author(s):  
Nikolai A. Aniskin ◽  
Alexey M. Shaytanov
Keyword(s):  
Comparative Analysis ◽  
Temperature Effects ◽  
Opportunity To Learn ◽  
Negative Temperature ◽  
Integrated Approach ◽  
Concrete Dams ◽  
Cement Concrete ◽  
Forecasting Methods ◽  
Structure Changes ◽  
Defect Elimination

Introduction. Low-cement concrete dams are water-retaining structures frequently used in modern hydraulic engineering. The number of facilities of this type goes up every year due to their simple design, speedy construction and high economic efficiency. However, a number of problems may arise in the construction and operation of such facilities. In particular, reduced strength and water permeability of interlayer joints may constitute a problem. Temperature effects arising in the course of construction and operation may cause additional deformation of their structure, changes in their stress-strain state, opening of existing cracks and further cracking. The study of the design experience, building and operation of dams made of low-cement concrete will lay the groundwork for the development of similar structures and defect elimination methods. It will also provide an opportunity to learn more about thebehaviour of structures exposed to various conditions, including climatic ones. Materials and methods. Data on existing dams made of low-cement concrete, research articles, technical reports and conference proceedings, including those issued by the International Commission on Large Dams (ICOLD), have been collected and analyzed. Results. The comparative analysis of designs of dams in operation and future-oriented solutions is performed. The co-authors have demonstrated the need for an integrated approach to solving temperature cracking problems by using filtration through the dam body. Conclusions. The results can be used as the basis for further detailed studies. The comparative analysis of traditional and innovative waterproofing liners will help to effectively choose the protection solution for an upstream face of a facility. New forecasting methods and recommendations aimed at the reduction of negative temperature effects on the operation of facilities can solve the temperature cracking problem.

TRANSLATION OF SOCIAL AND POLITICAL TERMINOLOGY OF CHINESE LANGUAGE AS A PROCESS OF NORMATIVE PRACTICE IN CONTEXT MODELS

2020 ◽  
Vol 6 (3) ◽  
pp. 172-182
Author(s):  
Saodat Nosirova ◽  
Keyword(s):  
Comparative Analysis ◽  
Law Enforcement ◽  
Chinese Language ◽  
Integrated Approach ◽  
Point Of View ◽  
Modern Chinese ◽  
Normative Practice ◽  
Context Models

The article is devoted to a comparative analysis of the socio -political terminology of the modern Chinese language.The purpose of the article is to search for an integrated approach to the study of the cognitive side of social and political terms of the Chinese language from the point of view of law enforcement in the process of translating official materials from Chinese into Uzbek and / or Russian and vice versa

Creative communication of artistic systems M. Tsvetaeva and B. Pasternak

2021 ◽  
Vol 6 (2) ◽  
pp. 74-82
Author(s):  
Anastasia Valerievna Sebeleva
Keyword(s):  
Comparative Analysis ◽  
Comparative Studies ◽  
Mutual Influence ◽  
Integrated Approach ◽  
Literary Studies ◽  
Textual Information ◽  
Priority Direction ◽  
Literary Process ◽  
History Of ◽  
Mutual Communication

This article proceeds from the fact that the problem of interaction and mutual influence is quite acute in literary studies. In this regard, the relevance of the research is due, firstly, to the correspondence to the priority direction of modern literary studies associated with the comparative analysis of the text, and secondly, to the need to disclose the deep theoretical and artistic content of creative communication of such artistic personalities of the XX century as M. Tsvetaeva and B. Pasternak, whose legacy still contains many lacunae. The methodological basis of the research is an integrated approach, including comparative-historical, historical-literary, comparative-typological, system-analytical and biographical methods, as well as the method of comparative studies, which allows to study literary analogies and connections of different national literatures, their refraction in the texts of the authors studied. Hermeneutics contributed to the mental comprehension of the analyzed texts, the mental processing of textual information. An important episode in the history of world poetry was the correspondence-dialogue of iconic poets for their time: M. Tsvetaeva and B. Pasternak. Correspondence is valuable not only because it shows us the life of poets in relation to time. The creative aspect of correspondence is very important. The rapprochement manifested in it and at the same time the repulsion was deeply creative and left deep traces in the legacy of all its participants. Poets, albeit to varying degrees, concentrated and passionately, sought to define for themselves the essence of life and poetry. In the course of the research, the author of the article comes to the conclusion that, firstly, the literary process is characterized by a systematic nature in which authors and their works are in certain relationships to each other. Secondly, the thirteen-year correspondence of M. Tsvetaeva with B. Pasternak was very significant for literature. Thanks to mutual communication, creative interaction, the poets created unique, emotionally deep works.

scholarly journals ОСОБЛИВОСТІ ДИЗАЙНУ РЕКЛАМНИХ ПЛАКАТІВ СУЧАСНИХ КОМП’ЮТЕРНИХ ІГОР

2019 ◽  
pp. 150-158
Author(s):  
Р. В. Хиневич ◽  
О. С. Васильєва ◽  
А. І. Жиденко
Keyword(s):  
Comparative Analysis ◽  
Computer Games ◽  
Integrated Approach ◽  
Gaming Industry ◽  
Modern Computer ◽  
Design Solutions

Consider posters as a means of advertising, artistic techniques and design solutions were used when creating them. Analysis of advertising posters of modern computer games, revealing features of their design and placement of characteristic elements: the name or logo of the game, the image of the protagonist, special details, etc. An integrated approach to the study of posters of the gaming industry was used, which made it possible to establish the features of their design and compositional solutions. The method of comparative analysis of modern advertising posters are used.

The Integration of the Eastern and Western Balkans into the EU and NATO

2022 ◽  
pp. 135-152
Author(s):  
Hugo Ferrinho Lopes ◽  
Alona Bondarenko
Keyword(s):  
Comparative Analysis ◽  
Integrated Approach ◽  
Western Balkans ◽  
The Balkans ◽  
Complex Interactions ◽  
Integrative Process ◽  
Exclusive Processes ◽  
Internal Fragmentation ◽  
The Relationship ◽  
The Eu

This chapter puts the European and Euro-Atlantic integration of the Balkans into the spotlight and further analyzes the reactions from Russia. This integrative process is a relevant intention, especially after the revolutionary changes of the 1990s and the collapse of the communist bloc. Literature is scarce, lacks an integrated approach, and barely addresses the topic from a comparative perspective. This research seeks to fill this gap through an empirical, systematic, and comparative analysis of the integration and disintegration processes across the region. The argument is that the integration is asymmetric, both between the two international organizations and between the two sub-regions, and that Russian investment decreases as integration goes forward. Findings highlight the complex interactions and interdependencies of the three mutually exclusive processes: the integration into the EU and NATO, the internal fragmentation of the region, and a transformation in the relationship with Russia when chasing the enlargement into these structures.

scholarly journals Structural, Dielectric, Magnetic and Magneto-Dielectric Properties of (1-x)BiFeO3–(x)CaTiO3 Composites

2021 ◽  
Author(s):  
Bushra Khan ◽  
Aditya Kumar ◽  
Preeti Yadav ◽  
Gulab Singh ◽  
Ashok Kumar ◽  
...  
Keyword(s):  
Ac Conductivity ◽  
Sol Gel ◽  
Negative Temperature ◽  
Tangent Loss ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Changes ◽  
Different Temperatures ◽  
Ferromagnetic Ordering ◽  
Jonscher’S Power Law

Abstract (1-x) BiFeO3–(x) CaTiO3 [(1-x) BFO – (x) CTO, (x = 0, 0.1, 0.2 and 0.3)] composites were synthesized using sol-gel chemical rout method. X-ray diffraction investigation shows the crystal structure changes from rhombohedral to monoclinic for 0 ≤ x ≤ 0.2, and it changes to orthorhombic at x ≤ 0.3. The Field Emission Scanning Electron Microscope (FESEM) investigation confirms the the microstructure consists of randomly oriented, homogenous, and non-uniform grains. The dielectric permittivity (ε) and tangent loss (tanδ) decreases with increasing frequency and show dielectric anomalies (as a hump) at different temperatures for different compositions. The incorporation of CTO, decreases three order of leakage current (up to x = 0.2) and significantly improve the magnetization and magneto-dielectric coupling. The frequency-dependent ac conductivity obeys Jonscher’s power law with large ac conductivity dispersion for higher frequencies with increasing CTO concentration. The variations of ac conductivity with the inverse of temperature obey the Arrhenius equation and show negative temperature coefficient of resistance (NTCR) behavior. The ferromagnetic (FM) properties in BFO-CTO increases significantly with an increase of the CTO concentration. The coercive field increases with increasing CTO concentration suggesting a competition between the antiferromagnetic and ferromagnetic ordering. At room temperature, all the samples show strong magneto-dielectric coupling.

scholarly journals Russia, China: Poverty Alleviation (Comparative Analysis)

2020 ◽  
pp. 61-67
Author(s):  
I. S. Orlova ◽  
G. M. Tsinchenko
Keyword(s):  
Comparative Analysis ◽  
Social Policy ◽  
State Policy ◽  
Poverty Alleviation ◽  
Social Assistance ◽  
Integrated Approach ◽  
The State ◽  
Practical Significance ◽  
Poverty Level ◽  
Comparison System

Goal and objectives. The article analyzes the state policy of Russia and China on poverty alleviation, conducted a comparative analysis of the strategy of the two countries in solving the problem, basic areas, social programs, measures, measures of social support for poor categories of citizens. The general and specific approaches of each. The results achieved are considered, as well as the objectives set by each country in this direction for the near and far term.Methods. The study uses a set of general scientific methods, such as analysis, synthesis, generalization, comparison, system-functional and integrated approach. Within the framework of the stated theme, theoretical provisions and modern approaches were systematic on the basis of the study of the works of various authors, federal and regional regulatory documents, official statistics.Results. The theoretical and practical significance of the study is to specify and organize the modern strategic approaches of the state policy of Russia and China, both in the sphere of poverty alleviation and in the provision of state social assistance to poor categories of citizens. These areas of state social policy of each country are not sufficiently researched by national science. The analysis provides an opportunity to identify the state of poverty in Russia and China, actualizes the importance of state policy to reduce poverty in each country, justifies the need for its further improvement in this direction. The findings highlight the positive results achieved by countries to date and identify the ways that have led to them, which can further promote public social policies to overcome poverty in each country and the system of state social assistance to the poor.Scientific novelty. The scientific novelty lies in the study of the state policy of Russia and China to reduce the poverty level of the population, as one of the most acute problems of both countries. The article shows the characteristics of poverty in each country, the scale and concentration of poverty, the trend of changing poverty in recent years as a result of the efforts of states and new strategies in public social policy. Weaknesses and strengths in the state social policy to overcome poverty in Russia and China have been identified. The lack of effectiveness of the organization of state social assistance to poor categories of citizens is justified. The conclusions are drawn on the versatility of ways to overcome poverty, the need to unite the efforts of all countries in this direction, the fruitfulness of the exchange of experience accumulated by different countries.

scholarly journals Specificities of the estimation of efficiency of investment and construction projects at various stages of their life cycle

2018 ◽  
Vol 170 ◽  
pp. 01093
Author(s):  
Aleksandr Bobkov ◽  
Boris Orlov ◽  
Nadezhda Belozerova ◽  
Ivan Provotorov ◽  
Irina Kozlova
Keyword(s):  
Decision Making ◽  
Life Cycle ◽  
Comparative Analysis ◽  
Discount Rate ◽  
Construction Projects ◽  
Process Management ◽  
Integrated Approach ◽  
Financial Decision Making ◽  
Financial Decision ◽  
Goals And Objectives

The paper addresses the issues related to the specificities of the estimation of efficiency of investment and construction projects (further ICP) at various stages of their life cycle. The structure of the ICP was analyzed; the necessity of detailed decomposition of the life cycle in order to improve the efficiency of block-process management was justified. The sequence of key organizational events in the implementation of the ICP is presented. The comparative analysis of methods for determining the discount rate was carried out. The methodology of the integrated approach to the organization of analysis of investment and construction projects is offered, which is characterized by close connection with the concept of the investment project’s life cycle. It promotes fuller compliance with the goals and objectives of investment and construction entities at all stages of investment, management and financial decision-making.

Prediction of perioperative parameters of laparoscopic organ-sparing interventions on the kidney taking into account the surgeon's "learning curve"

2021 ◽  
Author(s):  
V.N. Gridin ◽  
I.A. Kuznetsov ◽  
A.I. Gazov ◽  
E.S. Sirota
Keyword(s):  
Logistic Regression ◽  
Comparative Analysis ◽  
Learning Curve ◽  
Multilayer Perceptron ◽  
Regression Line ◽  
Integrated Approach ◽  
Duration Of Surgery ◽  
Surgical Tactics ◽  
The Impact

The paper considers an integrated approach for constructing models for predicting the perioperative parameters of laparoscopic kidney resections, which include the duration of the operation, the time of thermal ischemia, and the glomerular filtration rate 24 hours after the operation. The approach is based on the principle of expanding the feature space, extracted from the analysis of the surgeon's "learning curve" data when mastering laparoscopic kidney resections. The aim of this work is to predict the main perioperative parameters that have the most significant impact on the surgical tactics of treatment at the stage of planning surgery. New methods have been developed for identifying significant parameters that take into account the complexity of the operation and the qualifications of the surgeon based on his “learning curve”. The parameters to be distinguished include: “complexity of the operation” based on nephrometric indices (RENAL, PADUA and C-index); the average value of the predicted perioperative parameters of surgical interventions depending on the complexity; slope and standard error based on the regression line of predicted perioperative parameters. Models were developed for predicting the perioperative parameters of laparoscopic organ-preserving kidney interventions using modern approaches based on machine learning, which are based on the algorithms “decision trees”, “multilayer perceptron”, “Naïve Bayes”, “logistic regression”. A comparative analysis of the quality of the developed models was carried out, as a result of which the best result was obtained using the “logistic regression” algorithm. The F-measure was used as a metric. A comparative analysis of the developed models was carried out to assess the impact on the final quality of the new selected features. For the predicted parameter “time of thermal ischemia” the increase was from 9.68% to 16.68%; for the predicted parameter “duration of surgery” the increase was from 2.76% to 4.08%. At the same time, for the predicted parameter “GFR in 24 hours” there was no significant increase, and for the “multilayer perceptron” algorithm it turned out to be negative. The obtained forecasting models can be used in applied software solutions that act as decision support systems in determining the surgical tactics of treating patients with localized formations of the renal parenchyma. Such software solutions can be implemented as a web service or as a separate program.

Top-Down Cracking of Rigid Pavements Constructed with Fast-Setting Hydraulic Cement Concrete

2000 ◽  
Vol 1712 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Andrew C. Heath ◽  
Jeffery R. Roesler
Keyword(s):  
Drying Shrinkage ◽  
Plain Concrete ◽  
Negative Temperature ◽  
Traffic Load ◽  
Cement Concrete ◽  
California Department ◽  
Hydraulic Cement ◽  
Field Instrumentation ◽  
Finite Element Package ◽  
Pavement Testing

Test sections of jointed plain concrete pavement were constructed with fast-setting hydraulic cement concrete (FSHCC) as part of the California Department of Transportation accelerated pavement-testing program. Many of the longer slabs cracked under environmental influences before any traffic load was applied to them. Data from field instrumentation were recorded and analyzed along with laboratory test data to determine the cause of the cracking. Cores drilled through the cracks indicated that cracking began at the top of the slabs and propagated downward. This was confirmed with the ILLI-SLAB (ILSL2) finite-element package in which high tensile stresses were predicted at the top of the slab as a result of the differential drying shrinkage between the top and base of the slab and the nonlinear nature of the negative temperature gradients through the slab. Laboratory free-shrinkage tests with the test section concrete indicated significantly higher levels of shrinkage compared with that achieved with ordinary Type II portland cement. Load plus environmental stress analysis with ILSL2 suggested that the critical failure location for the FSHCC pavements would be near the corner of the slab and not at the midslab edge.

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