Program Complex for Automated Calculation of the Geometry of Impact Units of Machines

2021 ◽  
Vol 12 (8) ◽  
pp. 404-412
Author(s):  
E. G. Timofeev ◽  
◽  
I. A. Zhukov ◽  
A. V. Teplyakova ◽  
◽  
...  
Keyword(s):  
Physical Experiment ◽  
Geometric Parameters ◽  
Geometric Complexity ◽  
Mathematical Apparatus ◽  
Impact Pulse ◽  
Program Complex ◽  
Theoretical Approaches ◽  
Drilling Operations ◽  
The Impact ◽  
Resistance Forces

Improving the designs of impact mining machines in order to increase the productivity of drilling operations requires calculations of the geometric parameters of impact units. The greatest effect when the impact is applied to the rock is given by an impact pulse corresponding to the resistance forces of the object being destroyed. In turn, the shape and parameters of the impact pulse are determined by the geometry of the colliding bodies. Analytical methods for analyzing dynamic processes in impact systems involve the use of a very complex mathematical apparatus, which does not allow us to quickly solve the problems of engineering design of machines and mechanisms. The authors of this article have developed a numerical method for calculating and analyzing impact pulses generated in the machine system by bodies of any geometric complexity. The reliability of the theoretical approaches is confirmed by the results of a physical experiment. The developed software allows you to quickly and accurately solve the problem of finding and justifying rational geometric parameters of impact nodes of machines.

Economic behavior of households and their welfare: models and forms of interaction

2020 ◽  
pp. 3-8
Author(s):  
Maryana Bil ◽  
Olha Mulska
Keyword(s):  
Economic Growth ◽  
Social Protection ◽  
Well Being ◽  
Central Place ◽  
Economic Behavior ◽  
Human Potential ◽  
Modern Theory ◽  
Economic Behaviour ◽  
Theoretical Approaches ◽  
The Impact

The article defines the content of welfare as a measure of socially oriented efficiency of economic growth, which reflects the appropriate level of providing the population with material and spiritual goods with the formation of favourable conditions for human development and capitalization of human potential in a competitive mobile space. The modern theory of welfare testifies to the deepening of scientific discussions on the transformation of economic welfare into mobile and inclusive, as well as the opposition of competitive and social protection welfare policy. Another milestone in the evolution of welfare theory is the individualization of its provision. Conditions of competition and mobility increase the importance of households in providing their well-being with further reflection on the processes of economic growth of the community, region, and state. This gives grounds to actualize the issues of household welfare research and strengthening economic growth based on behavioural economics. The needs, interests, motives, and incentives determine the economic behaviour of households. At higher levels, it defines an economic culture that is closely linked to the national mentality. In this regard, the main models of economic and social behaviour of households – socialization, adaptation, integration, values, regulation, and the definition of financial development strategies are outlined. Theoretical approaches to the explanation of economic behaviour are generalized, namely religious-ethical, psychological, substantive theories, theories of motivations and acquired needs, process theories, theories of justice, and others. Based on the ideas of foreign scientists, the main determinants of the economic policy of households are proposed. Political, stabilizing, and economic determinants are distinguished in the group of general determinants. In the group of determinants directly related to households, the financial, demographic, cultural, social, empirical, and psychological are suggested. The author’s emphasis is placed on the importance of the impact of financial determinants of the households’ economic behaviour, the central place among which is occupied by savings.

Curbing electronic shopper perceived opportunism and encouraging trust

2017 ◽  
Vol 117 (10) ◽  
pp. 2210-2226 ◽  
Author(s):  
Sonia San-Martín ◽  
Nadia Jimenez
Keyword(s):  
Information Asymmetry ◽  
Structural Equation ◽  
Design Methodology ◽  
External Quality ◽  
Content Type ◽  
Theoretical Approaches ◽  
Quality Signals ◽  
The Impact ◽  
Relevant Factors ◽  
Analyze Data

Purpose Consumers can face a situation of information asymmetry in electronic shopping (ES). The purpose of this paper to examine the relationships between: relational variables such as satisfaction, trust and perceived opportunism; and website cues (cognitive signals such as security and personalization, and experiential signals, such as design and entertainment). Design/methodology/approach The paper opted for the structural equation methodology to analyze data collected from 447 Spanish e-shoppers. Findings Results show different factors that relate to satisfaction, trust and perceived opportunism in ES. Satisfactory experience with ES and entertainment emerge as the most relevant factors to achieve trust and prevent perceived opportunism in e-commerce. Originality/value The five contributions of this study are: the introduction of variables from several theoretical approaches to the study of an agency problem in e-commerce; the study of different ways to gain buyer trust and reduce perceived opportunism in an electronic shopper-vendor relationship; the application of signaling theory as part of the process of helping the principal (e-shopper) to solve their shopping problem in a context of information asymmetry; the analysis of the impact of external cues from e-vendor/site, which allows for a comparison between internal experiences and external quality signals; and the study of entertainment as an important hedonic variable in order to have satisfied and confident e-shoppers.

THEORIES OF REGIONAL DEVELOPMENT AS A METHODOLOGICAL BASIS FOR THE FORMATION OF RUSSIA'S REGIONAL POLICY

2021 ◽  
Author(s):  
Наталия Александровна Иванова
Keyword(s):  
National Economy ◽  
Global Financial Crisis ◽  
Systematic Research ◽  
Macroeconomic Conditions ◽  
Theoretical Approaches ◽  
Territorial Structure ◽  
Territorial Organization ◽  
The Global Financial Crisis ◽  
The Impact

Актуальность исследования для экономики усиливается такими явлениями, как влияние мирового финансового кризиса, усложнение отраслевой и территориальной структуры производства, усиление интеграции всех сфер общественной жизни, возрастание значения экологических, социальных и политических факторов развития общества, повышение трансакционных издержек принятия решений в сфере управления. Изучение литературы о территориях дает основание определить понятие региональной системы России как элемент, подсистему некоторой иерархической системы, в роли которой выступает национальная экономика. Процессы глобализации коренным образом изменяют роль регионов в национальной экономике. Регион постепенно становится не только отдельным экономическим агентом, но также вступает в мировые конкурентные процессы. Положение территориально-организованных систем оказывается зависимым не только от макроэкономических условий или возможностей самих регионов, но также от расстановки конкурентных сил, механизмов взаимодействия регионов с другими субъектами. В этой связи возникает необходимость системных исследований с целью выработки комплекса мер, которые будут способствовать повышению конкурентоспособности экономики в целом, ее регионов в частности. Существующий инструментарий региональной экономики является уже недостаточным для анализа такого рода проблем, а традиционный конкурентный анализ не рассматривает регионы в качестве субъектов конкуренции. Требуется расширение и применение новых теоретических подходов к анализу региональных экономических систем и эффективности их развития, формированию целостной концепции развития территориальной организации хозяйства, что обусловило актуальность данного исследования. The relevance of the study for the economy is enhanced by such phenomena as the impact of the global financial crisis, the complication of the sectoral and territorial structure of production, the strengthening of integration of all spheres of public life, the increasing importance of environmental, social and political factors in the development of society, the increase in transaction costs of decision-making in the field of management. The study of the literature on territories gives grounds to define the concept of the regional system of Russia as an element, a subsystem of some hierarchical system, in the role of which the national economy acts. The processes of globalization are fundamentally changing the role of regions in the national economy. The region is gradually becoming not only a separate economic agent, but also enters into global competitive processes. The position of geographically organized systems turns out to depend not only on the macroeconomic conditions or the capabilities of the regions themselves, but also on the alignment of competitive forces, the mechanisms of interaction of regions with other entities. In this regard, there is a need for systematic research in order to develop a set of measures that will contribute to improving the competitiveness of the economy as a whole, its regions in particular. The existing tools of the regional economy are no longer sufficient to analyze such problems, and traditional competitive analysis does not consider regions as subjects of competition. It requires the expansion and application of new theoretical approaches to the analysis of regional economic systems and the effectiveness of their development, the formation of an integral concept of the development of the territorial organization of the economy, which determined the relevance of this study.

scholarly journals Modelling of motorway bridge spans under modernization with consideration of rheological properties of the materials

2018 ◽  
Vol 234 ◽  
pp. 04004 ◽  
Author(s):  
Alexey Lobiak ◽  
Andrii Plugin ◽  
Larisa Kravtsiv ◽  
Oksana Kovalova
Keyword(s):  
Rheological Properties ◽  
Computer Modelling ◽  
Concrete Slab ◽  
Kinetic Curve ◽  
Modelling Technique ◽  
Reinforced Concrete Slab ◽  
Program Complex ◽  
Building Information ◽  
Lev Landau ◽  
The Impact

The paper presents a computer modelling technique for modernization of bridgework operations by building-up a mounted reinforced concrete slab. It implements the technique of the evolutionary transformation of a model in one calculation cycle with redistribution of forces between the elements of the built-up section, and consideration of the impact of elastoplastic and rheological properties of the materials. Consideration of the concrete creep implies the application of the generalized kinetic curve of prolonged deformation and phenomenological deformation development equations based on the colloid-chemical concept of the prolonged concrete deformation mechanism. The creep control was implemented through new structural coefficients which determined the structure of matrix interlayers between the sand grains, and mortar between the crushed stone grains. The technique proposed was realized in the program complex “LIRA-SAPR” based on the building information modelling (BIM) and the finite element method (FEM). The multistage modelling technique was shown by an example of calculation of a motorway bridge slab span within the transport structures under modernization along the Lev Landau Avenue in Kharkiv (Ukraine).

scholarly journals Evaluation of the Wyoming Weather Modification Pilot Project (WWMPP) Using Two Approaches: Traditional Statistics and Ensemble Modeling

2018 ◽  
Vol 57 (11) ◽  
pp. 2639-2660 ◽  
Author(s):  
Roy M. Rasmussen ◽  
Sarah A. Tessendorf ◽  
Lulin Xue ◽  
Courtney Weeks ◽  
Kyoko Ikeda ◽  
...  
Keyword(s):  
Null Hypothesis ◽  
Initial Conditions ◽  
Pilot Project ◽  
Physical Experiment ◽  
Annual Precipitation ◽  
Ensemble Modeling ◽  
Cloud Seeding ◽  
Weather Modification ◽  
Mountain Ranges ◽  
The Impact

AbstractThe Wyoming Weather Modification Pilot Project randomized cloud seeding experiment was a crossover statistical experiment conducted over two mountain ranges in eastern Wyoming and lasted for 6 years (2008–13). The goal of the experiment was to determine if cloud seeding of orographic barriers could increase snowfall and snowpack. The experimental design included triply redundant snow gauges deployed in a target–control configuration, covariate snow gauges to account for precipitation variability, and ground-based seeding with silver iodide (AgI). The outcomes of this experiment are evaluated with the statistical–physical experiment design and with ensemble modeling. The root regression ratio (RRR) applied to 118 experimental units provided insufficient statistical evidence (p value of 0.28) to reject the null hypothesis that there was no effect from ground-based cloud seeding. Ensemble modeling estimates of the impact of ground-based seeding provide an alternate evaluation of the 6-yr experiment. The results of the model ensemble approach with and without seeding estimated a mean enhancement of precipitation of 5%, with an inner-quartile range of 3%–7%. Estimating the impact on annual precipitation over these mountain ranges requires results from another study that indicated that approximately 30% of the annual precipitation results from clouds identified as seedable within the seeding experiment. Thus the seeding impact is on the order of 1.5% of the annual precipitation, compared to 1% for the statistical–physical experiment, which was not sufficient to reject the null hypothesis. These results provide an estimate of the impact of ground-based cloud seeding in the Sierra Madre and Medicine Bow Mountains in Wyoming that accounts for uncertainties in both initial conditions and model physics.

scholarly journals Analytical and Experimental Analysis of a Free Link in Contact with a Granular Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Dan B. Marghitu ◽  
Seung Lee
Keyword(s):  
Granular Medium ◽  
Stopping Time ◽  
The Body ◽  
Resistance Force ◽  
Time Interval ◽  
The Moment ◽  
Static Resistance ◽  
The Impact ◽  
Resistance Forces ◽  
Empirical Approaches

In this study, the experimental and the simulation results for a planar free link impacting a granular medium are analyzed. The resistance force of the granular medium on the body from the moment of the impact until the body stops is very important. Horizontal and vertical static resistance forces developed by theoretical and empirical approaches are considered. The penetrating depth of the impacting end of the free link increases with the increase of the initial impacting velocity. We define the stopping time as the time interval from the moment of impact until the vertical velocity of the link end is zero. The stopping time of the end decreases as the initial velocity increases. The faster the end of the link impacts the surface of the granular medium, the sooner it will come to a stop. This phenomenon involves how rapidly a free link strikes the granular medium and how it slows down upon contact.

Experimental Investigation and Characterization of the Rotating Stall in a High Pressure Centrifugal Compressor: Part II — Influence of Diffuser Geometry on Stage Performance

2002 ◽  
Author(s):  
G. Ferrara ◽  
L. Ferrari ◽  
C. P. Mengoni ◽  
M. De Lucia ◽  
L. Baldassarre
Keyword(s):  
Experimental Tests ◽  
Rotating Stall ◽  
Geometric Parameters ◽  
Flow Coefficient ◽  
Low Flow ◽  
Main Task ◽  
Stage Performance ◽  
The Impact ◽  
Prediction Criteria

Extensive research on centrifugal compressors has been planned. The main task of the research is to improve present prediction criteria coming from the literature with particular attention to low flow coefficient impellers (low width to radius ratios) where they are no more valid. Very little data has been published for this kind of stages, especially for the last stage configuration (with discharge volute). Many experimental tests have been planned to investigate different configurations. A simulated stage with a backward channel upstream, a 2D impeller with a vaneless diffuser and a constant cross section volute downstream constitute the basic configuration. Several diffuser types with different widths, pinch shapes and diffusion ratios were tested. The effect of geometric parameters on stage stability has been discussed inside part I of the present work; the purpose of this part of the work is to illustrate the effect of the same geometric parameters on stage performance and to quantify the impact of stability improvements on stage losses.

scholarly journals International legal experience in combating illegal migration by sea

2021 ◽  
Vol 66 ◽  
pp. 284-287
Author(s):  
O.O. Kukshynova ◽  
A. O. Samoilenko
Keyword(s):  
European Union ◽  
Legal Framework ◽  
Legal Regulation ◽  
European Countries ◽  
The European Union ◽  
Illegal Migration ◽  
Illegal Migrants ◽  
Theoretical Approaches ◽  
The Impact ◽  
Treaty Of Amsterdam

This article highlights the impact of international law on the global process of illegal migration, reveals a number of international problems related to international migration, in particular by sea, identifies the main factors influencing illegal migration in general, indicates the state of illegal migration in various European Union countries. attention is paid to such important international legal instruments as the Schengen Agreement of 1985 and 1990, the Dublin Convention of 1990, the Maastricht Treaty of 1992 and the Treaty of Amsterdam of 1997. The article also focuses on the European Union agency, which deals with the protection of external borders and their protection from illegal migrants, in particular, by sea.The analysis of theoretical and practical aspects of combating illegal migration by sea at the international level, as well as in the development of scientific and theoretical approaches to solving migration problems, characterizes the legal regulation of combating illegal migration by maritime transport and maritime participation established intergovernmental bodies. The main tools of the European Union to combat illegal migration by sea, which can be used to improve the legal regulation of migration authorities of other countries, as well as substantiate the organizational and legal framework of European countries in the field of legal support to combat illegal migration by sea.The actions of European states represented by the relevant state bodies in solving the problems of illegal migration with the help of merchant fleets of European countries are studied. The article pays attention to the influence of illegal migration on the formation and change of legal awareness of society, as the beginning of the formation of criminogenic factors among illegal migrants in the host country.

scholarly journals ANALISIS DAN EVALUASI IMPLEMENTASI PENGELOLAAN KEPEMILIKAN UMUM DAN NEGARA DI INDONESIA (PENDEKATAN MADZHAB HAMFARA)

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Siti Murtiyani ◽  
Hery Sasono ◽  
Dwi Condro Triono ◽  
Hanifah Zahra
Keyword(s):  
Economic System ◽  
State Ownership ◽  
Management Approach ◽  
Public Ownership ◽  
Unequal Distribution ◽  
The Public ◽  
Wealth Management ◽  
Theoretical Approaches ◽  
Islamic Economic ◽  
The Impact

This study aims to analyze and critically evaluate the implementation of the management of public ownership (Milkiyah 'ammah) and State ownership (Milkiyah Daulah) in Indonesia. This study descriptively describes the implementation of both ownerships that are currently practicing in Indonesia. Theoretical approaches used is the Islamic Economic System Madzhab Hamfara (Hadza Min fadzli Rabbi) who critically evaluate the implementation of the public wealth management and state wealth in Indonesia. This research used secondary data that was obtained from Madzhab Hamfara books, literature, journal and information relating to the Indonesian State assets management system. A comparative analysis was conducted to understand the difference between the public wealth management and state wealth management in Indonesia. Findings show that the management of both, public and state ownership are not in accordance to the ownership management approach of Madzhab Hamfara Islamic Economic System. The evidence suggests that both public and state ownership are not fully managed by the Government of Indonesia. The fact shows that public ownership in the form of water, fire and pastures are managed by individuals and institutions as well as foreign parties who have fund to privatize the public ownership. Consequently, it has the impact on unequal distribution of income that cause poverty in Indonesia. This research suggest that government should implement Islamic Economic System Madzhab Hamfara in managing public and state ownership in Indonesia. =========================================== Kajian ini bertujuan untuk menganalisis dan mengevaluasi secara kritis penerapan pengelolaan kepemilikan umum (Milkiyah 'Ammah) dan kepemilikan negara (Milkiyah Daulah) di Indonesia. Studi ini menjelaskan secara deskriptif tentang implementasi pengelolaan kedua kepemilikan tersebut yang sekarang dipraktikkan di Indonesia. Teori yang digunakan dalam penelitian ini adalah Sistem Ekonomi Islam Madzhab Hamfara (Hadza Min fadzli Rabbi) yang secara kritis mengevaluasi implementasi pengelolaan kepemilikan umum dan negara di Indonesia. Kajian ini menggunakan data sekunder yang berasal buku-buku madzhab Hamfara, literatur, artikel jurnal dan informasi lainnya yang terkait dengan pengelolaan aset di Indonesia. Analisis perbandingan juga dilakukan untuk memahami perbedaan pengelolaan kepemilikan umum dan kepemilikan negara. Hasil kajian menunjukkan bahwa pengelolaan kepemilikan, baik kepemilikan umum maupun negara di Indonesia, tidak dijalankan sesuai dengan sistem ekonomi Islam Madzhab Hamfara. Bukti-bukti menunjukkan bahwa pengelolaan kepemilikan publik dan negara tidak sepenuhnya dilakukan oleh negara. Fakta juga menunjukkan bahwa kepemilikan tersebut lebih banyak diserahkan kepada lembaga-lembaga privat bahkan lembaga-lembaga asing. Akibatnya, kesenjangan pendapatan yang menjadi pemicu kemiskinan terus terjadi. Kajian ini menyarankan agar pemerintah mengimplementasikan sistem ekonomi Islam Madzhab Hamfara dalam pengelolaan kepemilikan umum dan negara di Indonesia.

scholarly journals The theoretical approaches for calculation of the vertical effective pressure of drop impact of artificial rain on soil and hard surface

2016 ◽  
Vol 1 ◽  
pp. 16-20
Author(s):  
Bryl S.V. ◽  
Zverkov M.S.
Keyword(s):  
Solid Surface ◽  
Land Reclamation ◽  
Effective Pressure ◽  
Pressure Drops ◽  
Impact Performance ◽  
Theoretical Approaches ◽  
Rain Drops ◽  
Artificial Rain ◽  
Newton’S Laws ◽  
The Impact

The article considers the problem of calculating the vertical effective pressure drops of artificial rain on soil and hard surfaces. It is noted that the problem of determining the effective vertical pressure p of rain drops on soil although it is difficult, however, has a solution using Newton’s laws. This issue V.V. Slastenin, G. and A.P. Isaev, V.M. Moskovkin and V.F. gahs, etc., and N scientists. Erowyn S. , M.B. Lebedev, V.I., Gorodnichev, etc. proposed different approaches for determining the pressure p in terms of land reclamation (artificial irrigation). These issues dealt with and foreign researchers. Selected according to, according to the authors, the most suitable for the study of impact of the drops of artificial rain with the help of the patented device, and also to compare the obtained results with those of researchers dealing with the drip of erosion and determining the impact performance characteristics of droplets on a solid surface.

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