scholarly journals Application of seepage theory methods for solving the tasks of flow planning in transport networks with consideration of their structural dynamics

2021 ◽  
pp. 13-20
Author(s):  
Azret Ahmatovich Kochkarov ◽  
Danil Vladilenovich Yatskin ◽  
Rasul Ahmatovich Kochkarov
Keyword(s):  
Graph Model ◽  
Logistics System ◽  
Flow Models ◽  
Logistics Systems ◽  
System Building ◽  
Run Off ◽  
Global Transport ◽  
Seepage Theory ◽  
The Impact ◽  
And Task

This article reviews the theoretical-graph approach towards transport and logistic systems, which allows describing key details and processes that take place therein. The question of searching for an effective solution of transport and logistics tasks and dependence of such solutions to throughput of the system and the value of the seepage coefficient. This article offers to use seepage theory as an applied instrument for describing and solving transport and logistics tasks. The indicated approach is innovative and original, which may be very promising in the context of global transport planning and management. The essence of this method, based on adaptation of seepage theory for solution of the typical transport and logistics tasks, is reduced to operation of surface run-off and origin on the graph. The model for assessment of the global throughput of transport and logistics system is developed on the basis of the methods of seepage and multidrain flow models. The author offers a model calculation of the impact of holdups upon transport and logistics systems and the tasks solved thereof. A theoretical-graph model, which reflects the structure of transport and logistics system, describes the objects and processes common to transport and logistics tasks. The toolset of graph theory allows solving the specific transport and logistics tasks, as well examining the structural properties of the system, building predictive models, as well as developing new approaches towards solving of these tasks. The characteristics of graph are correlated with the actual network, system and task, as well as with the characteristics of transport or logistics flows examined for the purpose of optimization of topological structure of the system and solution of other tasks.

scholarly journals Urban environment influence on distribution part of logistics systems

2017 ◽  
Vol 42 (2) ◽  
pp. 7-23 ◽  
Author(s):  
Andrii Galkin
Keyword(s):  
Net Present Value ◽  
Performance Indicator ◽  
Road Transport ◽  
Evolutionary Development ◽  
Material Flows ◽  
Logistics System ◽  
Logistics Systems ◽  
Transport Services ◽  
Transportation Service ◽  
The Impact

The irregularities of evolutionary development, continuous improvement of environmental component into transport and raise many unsolved problem in the fields of transport in logistics systems and material flows management. The city parameters analyses had highlighted connections with transport services technology. Also the distribution stage of the logistic chain, which consists of following market participants: incoming material flow, retailers and Transportation Company (carrier) in different cities has been considered. Transportation service is made by road transport. The paper compares results of transportation servicing in different cities and logistic chains with same technology. As performance indicator net present value has been used. Existing criteria for evaluating the effectiveness of distribution of material flows does not sufficiently take into account the time value of money and possible options for investment, so when estimating the performance of servicing of business investment indicators should be used. Paper should elucidate the impact of cities on the transport service efficacy. Practical suggestions on logistics system functioning and transportation service of retailers in urban area have been proposed. Obtained results discovered overall impact of city’s parameters (density of streets and roads network’ irregularity factor; automobilizationlevel; urban square; scheme of road network; city radius) on logistics according to model which include more than 50 parameters and allows finding regularities of changing logistics efficiency on them.

scholarly journals Methodological approaches to efficiency evaluation logistics system of pharmacy network

2020 ◽  
pp. 5-7
Author(s):  
Viktoriia VAVILOVA
Keyword(s):  
Environmental Factors ◽  
System Approach ◽  
Efficiency Evaluation ◽  
Effective Management ◽  
Dynamic Changes ◽  
Logistics System ◽  
Logistics Systems ◽  
Methodological Approaches ◽  
The Impact ◽  
Functional Components

The paper reveals the important characteristics of methodological approaches to assessing the effectiveness of logistics systems. Peculiarities of functioning of logistics systems of pharmacy networks are characterized. Based on the acquaintance with the scientific works of the founders on this issue, approaches to assessing the effectiveness of the logistics system are systematized. A system of evaluation indicators for each component of the logistics system is proposed. The logistics system of the business entity, and this fully applies to the logistics system of pharmacy networks, is not in a permanent state. Dynamic changes in the system are due to the influence of macro-environmental factors and changes in the internal nature, which pose the task of developing the system to ensure its adequacy to new conditions. It is the development of the system is the basis for improving the efficiency of its operation and the ability to achieve goals through the solution of a certain range of tasks. In such conditions, the study of the development of the logistics system of the pharmacy network deserves special attention. Existing approaches to assessing the development of the logistics system do not exclude, but complement each other, creating a methodological basis for the formation of effective management decisions on logistics management of the business entity. As a result of research of scientific works of domestic and foreign scientists on a problem of a choice and formation of indicators of an estimation of efficiency of logistic systems, we proposed a system of evaluation indicators for each component of the logistics system. In this case, in our opinion, such a system should include not only indicators that characterize the efficiency of the functional components of the logistics system of the pharmacy network (supply, production, transportation, warehousing, sales), but also indicators of efficiency subsystems, namely organizational and management, infrastructure and resource subsystems. This system approach will allow to take into account the impact of all components of the logistics system of the pharmacy network on the efficiency of its operation.

scholarly journals Designing the transport and logistics systems resistant to structural failures

2020 ◽  
pp. 1-9
Author(s):  
Azret Ahmatovich Kochkarov ◽  
Danil Vladilenovich Yatskin ◽  
Rasul Ahmatovich Kochkarov
Keyword(s):  
Structural Stability ◽  
Optimization Theory ◽  
Sustainability Indicators ◽  
Logistics System ◽  
Logistics Systems ◽  
Optimization Task ◽  
The Matrix ◽  
Structural Failures ◽  
Feasible Solutions ◽  
The Impact

This article is dedicated to designing of the transport and logistics systems with built-in resistance to structural failures. The sustainability indicators reflect the impact of the failure of one or several hubs (communication channels) upon working capacity of the already functioning system. In the process of designing the system, the sustainability indicators also provide opportunities for optimizing its structure from the perspective of set reliability expectations. The authors give attention to the modeling of the transportation and logistics system on the basis of theoretical-graph toolset, as well as propose sustainability indicators and articulation of optimization task. The structure of transportation and logistics system is described using the instruments of graph theory, definition of the task is presented using the criteria of optimization theory, and limitations are the feasible solutions on graphs are established in the matrix form. The authors suggest a theoretical-graph description of the structure of the transportation and logistics systems, propose multiobjective goal setting, and introduce the concept of structural stability based on the indexes and their threshold values. Proposal is made on the approach towards designing the transport and logistics systems with set parameters of structural stability and tried it on test data.

scholarly journals ANALYSIS OF CHANGES IN THE VOLUME OF THE FREIGHT TRANSPORT MARKET IN THE REGION, TAKING INTO ACCOUNT THE IMPACT OF THE CORONOVIRUS PANDEMIC

2021 ◽  
Vol 9 (1) ◽  
pp. 155-163
Author(s):  
Alisher Subkhonberdiev
Keyword(s):  
Public Transport ◽  
Freight Transport ◽  
Negative Consequences ◽  
Negative Effects ◽  
Logistics System ◽  
Transport Services ◽  
Processing Data ◽  
Global Transport ◽  
The Subject ◽  
The Impact

The global transport and logistics system was one of the most affected areas as a result of the coronavirus pandemic. The negative effects are based on various factors, such as the closure of State borders, the introduction of restrictions on the movement of people and goods, the disruption of supply chains, and the decline in demand and purchasing power. The combination of these factors affected all types of transport – from the use of personal and public transport in cities to passenger and freight transport both within and between countries. The scale of negative consequences depends on the type of transport and the state's integration into the global transport and logistics system. However, transport as an industry should be more resilient to the consequences of any shocks, as it is one of the backbone sectors of the country's economy.The purpose of this article is to analyze the consequences of the crisis caused by the coronovirus pandemic for the rail freight transport market. The object of the study is the territorial center of branded transport services of the Southeastern railway. The subject of the study is analytical procedures and methods for processing data on the state and prospects of changes in the cargo market.

scholarly journals Digitalization as one of the directions of sustainable development of the integrated logistics system of the enterprise

2021 ◽  
Vol 291 ◽  
pp. 04012
Author(s):  
Zinaida Khmelnitskaya ◽  
Maria Ivich ◽  
Elena Bogdanova
Keyword(s):  
Sustainable Development ◽  
National Economy ◽  
Competitive Advantages ◽  
Logistics System ◽  
The Sustainable Development ◽  
Logistics Systems ◽  
Coronavirus Infection ◽  
Integrated Logistics ◽  
Constituent Elements ◽  
The Impact

Because of the pandemic of the new coronavirus infection, the pace of digitalization and its impact on all sectors of the national economy have increased. The integrated logistics systems of the enterprises have also undergone significant changes. The article examines the main trends of recent times — digitalization and integration, which provide development potential, competitive advantages for the enterprises using the integrated logistics systems. The authors investigated the impact of the new coronavirus infection on the changes in the logistics systems of the enterprise; identified eight main directions of the changes, one of which has become the acceleration of the digitalization along the entire chain of the integrated logistics systems. Further, the authors identified six characteristic constituent elements of the digitalization as one of the directions of the sustainable development. They examined the interaction between the functionalities of the integrated logistics system and the characteristic components of the digitalization.

scholarly journals NTEGRATION OF LOGISTICS SYSTEMS OF DEVELOPING COUNTRIES INTO INTERNATIONAL LOGISTICS CHANNELS

2021 ◽  
Vol 8 (4) ◽  
pp. 329-340
Author(s):  
Hassan Ali Al- Ababneh ◽  
Ilona Dumanska ◽  
Ella Derkach ◽  
Anna Sokhetska ◽  
Liliia Kemarska
Keyword(s):  
Developing Countries ◽  
Statistical Analysis ◽  
Analytical Methods ◽  
International Standards ◽  
Economic Research ◽  
Economic Modelling ◽  
Logistics System ◽  
Structural Dynamic ◽  
Logistics Systems ◽  
The Impact

Modern logistics significantly influences the globalization and internationalization processes. Logistics systems are becoming increasingly important in today’s rapidly changing environment. The aim of the article was to investigate the national logistics systems of developing countries in the context of their integration capabilities. The main methods used in this study are statistical analysis, index, graphical and analytical methods, methods for estimating structural dynamic shifts, comparisons. Commonly used methods of economic research, as well as statistical analysis and interstate comparisons, economic modelling (trend analysis to determine the forecast level of LPI for Ukraine), etc. were also involved. The logistics environment of Poland, Bulgaria, India and Ukraine, as well as the factors of its formation are evaluated. The components of the logistic portrait of the country in the context of integration capabilities of the logistic system are offered. It was found for the studied countries that the destimulator of the national logistics system is infrastructure (for Poland), infrastructure and customs (for Bulgaria and Ukraine), customs (for India). It is these components that need priority attention in the context of increasing the integration capabilities of logistics systems, because the results indicate that they lag far behind international standards. Prospects for further research involve studies of the impact of pandemics, globalization, digitalization on logistics systems, including that of developing countries.

scholarly journals Measuring Caregiver Person-Centered Communication for Persons With Dementia via Video Observations

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 152-152
Author(s):  
Ying-Ling Jao ◽  
Carissa Coleman ◽  
Kristine Williams ◽  
Diane Berish ◽  
Wen Liu ◽  
...  
Keyword(s):  
Sequential Analysis ◽  
Controlled Trial ◽  
Verbal Communication ◽  
Rater Reliability ◽  
Coding Scheme ◽  
Video Observations ◽  
Interactive Nature ◽  
The Impact ◽  
Mealtime Interactions ◽  
And Task

Abstract Communication is fundamental for daily care activities in nursing homes (NHs). Second-by-second behavioral coding of video observations is an ideal approach to examine the interactive nature of communication but requires a reliable coding scheme. Recent studies have adapted the Peron-Centered Behavioral Inventory (PCBI) and Task-Centered Behavioral Inventory (TCBI) to analyze caregiver communication during mealtime interactions, but their use for coding general daily caregiving activities has not been widely evaluated. This pilot study adapted the PCBI and TCBI of video observations and determined their inter-rater reliability for measuring caregiver verbal communication with persons with dementia (PwD). We analyzed videos from a randomized controlled trial of an intervention to improve caregiver communication in NHs. We selected one 1-minute segment from 12 videos that included interactions of caregiver-resident dyads. One research assistant transcribed caregivers’ verbal communication and segmented the communication into utterances. Two other research assistants independently coded each utterance using the adapted PCBI and TCBI. The coding scheme was expanded by modifying the existing operational definitions, adding three new codes, and developing a coding decision guide. Residents were Caucasian (100%), mean age 86 years with dementia and resistive behaviors. The adapted PCBI and TCBI had an inter-rater reliability of Kappa=0.656 (p<.001) across the 12 videos. Overall, our adapted PCBI and TCBI showed substantial inter-rater reliability. The results support the use of our adapted PCBI and TCBI to distinguish between person-centered and task-centered communication in video observations, which, in turn, allows for sequential analysis to examine the impact of caregiver communication on PwD.

scholarly journals The impact of hyperoxia on brain activity: A resting-state and task-evoked electroencephalography (EEG) study

PLoS ONE ◽  
2017 ◽  
Vol 12 (5) ◽  
pp. e0176610 ◽  
Author(s):  
Min Sheng ◽  
Peiying Liu ◽  
Deng Mao ◽  
Yulin Ge ◽  
Hanzhang Lu
Keyword(s):  
Resting State ◽  
Brain Activity ◽  
The Impact ◽  
And Task
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