scholarly journals Development of Analytical Methods for Calculating Time Standards for Shunting Operations

2021 ◽  
pp. 51-64
Author(s):  
D. M. Kozachenko ◽  
A. I. Verlan ◽  
R. H. Korobiova
Keyword(s):  
20Th Century ◽  
Analytical Methods ◽  
Historical Analysis ◽  
Operating Conditions ◽  
Railway Transport ◽  
Industrial Enterprises ◽  
Literary Sources ◽  
Initial Location ◽  
Scientific Principles ◽  
Time Standards

Purpose. The article is aimed to conduct a historical analysis of the development of analytical methods for standardizing the duration of shunting operations, as well as assessing their compliance with the existing operating conditions of railway transport. Methodology. The research in this article was carried out on the basis of an analysis of literary sources and methods of the theory of the organization of the operational work of railways. Findings. The standardization of the duration of shunting operations is one of the most important tasks of the theory of operational work of railways. The existing method of standardizing the duration of shunting operations developed in the first half of the 20th century and is used to this day. The performed analysis shows that the scientific principles underlying it generally correspond to the modern conditions of the railway transport. Additional research in this area can be associated with assessing the influence of the initial location of cars on the tracks on the average duration of shunting operations, taking into account the influence of length restrictions of the cars groups being moved, as well as monitoring the implementation of established norms by statistical methods. The article also shows that the values of modern time standards for shunting operations, in many cases, are set for technical means and technologies that were used in railway transport in the 50–70s of the 20th century and do not correspond to the operating conditions of real stations and sidings of industrial enterprises. Therefore, they require revision. Originality. In this paper, based on historical analysis, the process of development of methods for setting the time for shunting operations is described and the factors influencing the current value of norms are established. Practical value. The research results make it possible to identify the reasons for the discrepancy between the existing time standards for performing shunting operations and the real operating conditions of stations and sidings of industrial enterprises, as well as to establish the main elements of the methodology for standardizing the duration of shunting operations that require revision.

scholarly journals Improvement of the method for standardizing the duration of rail cars shunting

2021 ◽  
pp. 158-164
Author(s):  
D.M Kozachenko ◽  
B.V Gera ◽  
E.K Manafov ◽  
A.V Gorbova ◽  
R.G Korobyova
Keyword(s):  
Piecewise Linear ◽  
Setting Time ◽  
Piecewise Linear Function ◽  
Operating Conditions ◽  
Optimal Order ◽  
Railway Stations ◽  
Industrial Enterprises ◽  
Time Standards ◽  
Railway Operation ◽  
Time Standard

Purpose. To improve the method for calculating the time standard for shunting cars from track to track in order to take into account the local operating conditions of railway stations and railway sidings. Methodology. During the research, the methods of theory of railway operation were used. The problem of calculating the time standard for shunting operation was solved as the problem of searching the optimal division of train set into the car groups to achieve minimal time consumption for shunting operation. Findings. In the course of the study, the methods for calculating the time standards for initial and final operations, as well as movements performed when shunting cars from track to track were improved. It was proved that the minimum time spent on shunting cars from track to track was achieved when the train set was divided into the minimum possible number of parts and the cars were shunted in the longest possible groups and one remaining group. It was also established that with sufficient accuracy for engineering problems the duration of shunting train set from track to track can be represented by the piecewise linear function of the car number in it. Originality. The work originality consists in improving the method for calculating the time standard for shunting cars from track to track, that, unlike the existing one, takes into account the length limitations of the car groups being shunted from track to track, as well as the actual composition of operations performed in the process of shunting. Practical value. The use of the developed method allows setting time standards for shunting cars from track to track, taking into account the local operating conditions of railway stations and sidings of industrial enterprises. The method also makes it possible to simplify solving problems of searching the optimal order of performing more complex shunting operations, such as sorting cars into several tracks, collecting cars on one track, train formation, and others.

scholarly journals Determination of conditions for spontaneous combustion of combustible dust deposits on equipment, in ventilation systems, and aspiration systems of buildings and structures

2020 ◽  
Vol 29 (4) ◽  
pp. 32-41
Author(s):  
L. P. Vogman ◽  
D. A. Korolchenko ◽  
A. V. Khryukin
Keyword(s):  
Spontaneous Combustion ◽  
Growth Dynamics ◽  
Operating Conditions ◽  
Industrial Enterprises ◽  
Process Characteristics ◽  
Industrial Buildings ◽  
Dust Deposits ◽  
Production Facilities ◽  
Ventilation Systems

Introduction. Determination of the scientifi cally substantiated frequency of cleaning the ducts of local exhausts of industrial buildings and structures is one of the tasks in the fi eld of fi re safety of industrial enterprises. The paper describes design methods, in particular, a method for determination of the induction period during spontaneous combustion of dust deposits in air ducts of ventilation systems and equipment, which can be used in solving problems focused on the development of preventive measures to ensure their fi re and explosion safety.Methods. In order to solve the problem set in this paper and compare the indicators obtained in the calculation and analytical part of the studies with the growth dynamics of deposits in real facilities, fi eld tests have been accomplished in the production facilities of the fl our mill of OJSC MK “Voronezhsky” and JSC Concern “Sozvezdiye”.Results and discussion. The timeframes for cleaning of deposits on ventilation (aspiration) equipment of buildings and structures cannot be universal for various industries and must take into account the dynamics of the growth of deposits depending on the specifi cs of combustible deposits, the workload of the production facilities of the protected object in a given period of time, and the operating conditions of the equipment. As a result of the experiments, it was found that the places of maximum accumulations of deposits are most often formed on the surfaces of joints and on the bends of pipelines of ventilation systems. The conditions of spontaneous combustion of combustible dust are studied by calculation and analytical method, depending on such process characteristics as the speed of the dust-air mixture fl ow in the duct, as well as the diameter of the duct’s cross section.Conclusions. The nomograms built on the basis of the studies performed can be used to determine the multiplicity of cleaning of combustible dusts of equipment and air ducts of industrial ventilation systems. The paper provides a calculation of the period of induction of spontaneous combustion of combustible dust deposits using the example of rye fl our with asymmetric heat transfer. Its signifi cance is due to the process of accumulation of deposits of combustible dust to a critical thickness in terms of spontaneous combustion conditions.

scholarly journals The authority of the ecumenical patriarch in the Orthodox Church: A historico-canonical analysis

2010 ◽  
pp. 301-322
Author(s):  
Vasilije Vranic
Keyword(s):  
20Th Century ◽  
Canon Law ◽  
Historical Analysis ◽  
Vital Role ◽  
Eastern Orthodox ◽  
Orthodox Church ◽  
Christian Church ◽  
Exact Role ◽  
History Of ◽  
The Right

During the 20th century, the exact role and the scope of jurisdictional authority of the Ecumenical Patriarch was an object of attention of both theologians and historians. The problem of defining the Patriarch was reactualized through the intensification of conciliar negotiations of Orthodox Churches. The purpose of this article is to demonstrate that the pretensions of the Ecumenical Patriarch for universal jurisdiction over the entire Orthodox Diaspora, and the pretensions for the right of final arbitration in the ecclesial matters of the entire Orthodox communion, do not have a support in the Orthodox Ecclesiology. This will be argued in a historical analysis of the relevant prescriptions of the Eastern Orthodox Canon Law, which will be placed into the context of the history of the Christian Church, primarily of the Patristic period, since there disciplines play a vital role in the Orthodox understanding of Ecclesiological Tradition.

scholarly journals Kryzys filozofii polityki

2011 ◽  
Vol 13 ◽  
pp. 23-42
Author(s):  
Barbara Markowska
Keyword(s):  
20Th Century ◽  
Subject Matter ◽  
Theoretical Consideration ◽  
Scientific Discipline ◽  
Operating Conditions ◽  
Decisive Factor ◽  
Early 20Th Century ◽  
Leo Strauss ◽  
Set Up ◽  
Scholarly Pursuit

The purport of the article is a reflection on the operating conditions of the philosophy of politics, beginning with its crisis, as described by Leo Strauss in the early 20th century and continuing up to the latest proposals, which emerged at the turn of the 20th and 21st centuries. First, the author poses a question regarding the essence of this crisis; was it related to the scientific paradigm of the philosophy of politics applied hitherto or, rather, to the very subject matter of this scholarly pursuit, which is to say, to politics itself. A scientific discipline must be able to delineate its subject matter and if the latter undergoes an unexpected modification, the former suffers a crisis. Was this what happened to politics itself? What was the decisive factor which caused it to escape a theoretical consideration that ceased to be a systematic reflection, in short, ceased to be science, only to become philosophy again, whereby the author understands ‘philosophy’ as a level of reflection such as to allow itself to posit subliminal questions purely in order to set up the determinants for further thinking as to what science is, what politics is and what makes politics different from non-politics.

scholarly journals Jusuf Mehonjić in songs of Sanjak Bosniaks

2018 ◽  
Vol 1 (1) ◽  
pp. 120-129
Author(s):  
Naka K. Nikšić ◽  
Keyword(s):  
Theoretical Analysis ◽  
20Th Century ◽  
Education System ◽  
Oral Literature ◽  
Historical Sources ◽  
Significant Figure ◽  
Musical Tradition ◽  
Literary Sources ◽  
History Of ◽  
Epic Poems

The difficult position of Bosniaks Sandžak at the beginning of the 20th century has caused the uprising of individuals from the authorities and their association with comites (rebels). According to historical sources, the most famous Sandzak rebel was Jusuf Mehonjić, a native of Šahović (village Grančarevo), which Zaimović, in one of his work, called the Bosniak's Wilhelm Tell. He is mentioned in numerous epic poems called the so-called rebel opus that we find in the collections of oral literature of Bosniaks Sandžak, and from them the knowledge of his intellectual and physical potential, as well as the character of the protector of the disadvantaged and endangered Bosniaks. However, when it comes to ethnomusicological collections, we find that there is not a single song about this historical personality in them. The aim of this work is to preserve the musical tradition of Sandzak Bosniaks by finding and ethnomusicologic recording of lyrical poems about Jusuf Mehonjic, as well as pointing to the possibility of their nurturing through the education system in teaching in the Bosnian language in Serbia. The work and the work of Jusuf Mehonjić were examined in the paper by theoretical analysis of historical and literary sources. At the same time, the Finnish method recorded the only lyrical song about him, which we found by exploring the live musical tradition of the Sandzak Bosniaks. This is the song of Moj sokole pogledaj niz polje. This work should contribute to preserving the musical tradition of the Sandzak Bosniaks and getting to know Jusuf Mehonjic - a significant figure in the history of Sandzak.

scholarly journals TRENDS AND PROBLEMS OF INNOVATIVE ACTIVITIES DEVELOPMENT OF DOMESTIC INDUSTRIAL ENTERPRISES

2020 ◽  
Vol 1 (2) ◽  
pp. 20-26
Author(s):  
Oksana Prodius
Keyword(s):  
Innovative Development ◽  
Industrial Enterprises ◽  
Funding Sources ◽  
Innovation Potential ◽  
Innovation Infrastructure ◽  
Exposure Response ◽  
Innovative Products ◽  
The Status ◽  
Scientific Principles ◽  
Start Ups

The aim of the article is to study the dynamics of innovations development, to identify the main problems of innovative activities development and to advance proposals for the incentive instruments formation. The main method of research is the systemic and structural approach, which makes it possible to organize the search for solving problems most effectively. Methods of comparative, functional analysis and classification are also used. The theoretical basis of the article is the conceptual provisions and scientific principles developed by domestic and foreign scientists on the innovative development of industrial enterprises, tools for their implementation. However, the problems associated with the development and implementation of an effective mechanism for applying the innovative development of industrial enterprises in the context of the need to intensify the inclusiveness of innovative processes remain unfinished. The importance and significance of these questions determined the choice of the topic of the article, setting of the purpose and objectives of the study. The article analyzes the status and dynamics of innovative activities of domestic enterprises. The main trends and problems of the enterprises’ innovative development in modern conditions of limited financing and reducing the foreign investment resources are revealed. The level of using various types of innovations by industrial enterprises is investigated and the peculiarities of cost sharing for innovative activities are determined. The condition analysis of innovative activities of Ukraine’s industrial enterprises is carried out, namely the ratio of innovative products sold, the ratio of enterprises engaged in innovative activities, the number of new technological processes introduction and the production development of new types of products by industrial enterprises, funding sources of innovative activities. The structural analysis of various instruments efficiency of innovations financing in the domestic market is carried out. Ukraine’s innovation infrastructure should be provided with adequate resources in the context of a modern international methodology to support innovative business, which will help to minimize and close this gap. The available resources and potential should be focused on supporting research, which is one of the foundations of innovation potential, and creating an effective infrastructure that will help to transform research results into a product suitable for commercialization. Programs should be introduced to support academic payouts, start-ups, or other means of commercial use of innovative investments. The exposure-response relationships of innovative development stagnation are revealed and the ways of optimization and elimination of imbalance are provided. The recommendations for improving the innovative activities of industrial enterprises are developed.

K. Patricia Cross's Chain-of-Response (COR) Model for Widening Participation at Higher Levels of Lifelong Learning in a World of Massification

2014 ◽  
pp. 246-261
Author(s):  
Jo Ann M. Bamdas
Keyword(s):  
Higher Education ◽  
20Th Century ◽  
Historical Analysis ◽  
Widening Participation ◽  
Deficit Model ◽  
Early 21St Century ◽  
Emerging Trends ◽  
Decision Making Processes ◽  
Positive Perspective ◽  
Learning Institutions

Adult and community education theorists and practitioners in the 20th century focused on reasons people sought degrees beyond high school. As time went on, a greater need became apparent for a more educated populace. This need then drove the focus from only undergraduate education to higher education and expanded into graduate education. Participation quickly became a major topic for these leaders. Over 30 years ago, K. Patricia Cross (1981) created the Chain-of-Response (COR) model to better understand the decision-making processes of participation in higher learning institutions. These 20th century studies were largely from a deficit-model perspective rather than the positive perspective that has emerged in early 21st century research. A historical analysis of the COR research points to future and emerging trends showing COR value beyond U.S. borders for deeper understanding of widening participation, massification, and diversity in higher education. This is explored in this chapter.

scholarly journals ACAT1 Benchmark of RANS-Informed Analytical Methods for Fan Broadband Noise Prediction—Part I—Influence of the RANS Simulation

Acoustics ◽  
2020 ◽  
Vol 2 (3) ◽  
pp. 539-578
Author(s):  
Carolin Kissner ◽  
Sébastien Guérin ◽  
Pascal Seeler ◽  
Mattias Billson ◽  
Paruchuri Chaitanya ◽  
...  
Keyword(s):  
Turbulence Model ◽  
Analytical Methods ◽  
Companion Paper ◽  
Broadband Noise ◽  
Operating Conditions ◽  
Navier Stokes ◽  
Data Set ◽  
The Past ◽  
Flow Turbulence ◽  
Diverse Data

A benchmark of Reynolds-Averaged Navier-Stokes (RANS)-informed analytical methods, which are attractive for predicting fan broadband noise, was conducted within the framework of the European project TurboNoiseBB. This paper discusses the first part of the benchmark, which investigates the influence of the RANS inputs. Its companion paper focuses on the influence of the applied acoustic models on predicted fan broadband noise levels. While similar benchmarking activities were conducted in the past, this benchmark is unique due to its large and diverse data set involving members from more than ten institutions. In this work, the authors analyze RANS solutions performed at approach conditions for the ACAT1 fan. The RANS solutions were obtained using different CFD codes, mesh resolutions, and computational settings. The flow, turbulence, and resulting fan broadband noise predictions are analyzed to pinpoint critical influencing parameters related to the RANS inputs. Experimental data are used for comparison. It is shown that when turbomachinery experts perform RANS simulations using the same geometry and the same operating conditions, the most crucial choices in terms of predicted fan broadband noise are the type of turbulence model and applied turbulence model extensions. Chosen mesh resolutions, CFD solvers, and other computational settings are less critical.

MEDIA-CAPITALISM: COLLOQUIAL MASS CULTURE AND NATIONALISM IN EGYPT, 1908–18

2010 ◽  
Vol 42 (1) ◽  
pp. 103a-103a
Author(s):  
Ziad Fahmy
Keyword(s):  
National Identity ◽  
20Th Century ◽  
Mass Culture ◽  
Historical Analysis ◽  
Recorded Music ◽  
First Time ◽  
Egyptian History

In Egypt, during the late 19th and early 20th centuries, older, fragmented, and more localized forms of identity were rapidly replaced with new alternative concepts of community, which for the first time had the capacity to collectively encompass the majority of Egyptians. This article is about the growth of Egyptian national identity from 1908 until 1918. It highlights the importance of previously neglected colloquial Egyptian sources—especially recorded music and vaudeville—in examining modern Egyptian history. Through the lens of colloquial mass culture, the study traces the development of collective Egyptian identity during the first quarter of the 20th century. This article also engages with some of the theories of nationalism and tests their applicability to Egypt. Finally, it introduces the concept of “media-capitalism” in an effort to expand the historical analysis of nationalism beyond print.

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