scholarly journals Logistics management of the rail connections using graph theory: the case of a public transportation company on the example of Koleje Dolnośląskie S.A.

2018 ◽  
Vol 10 (3) ◽  
pp. 7-22
Author(s):  
Paweł Sobczak ◽  
Ewa Stawiarska ◽  
Judit Oláh ◽  
József Popp ◽  
Tomas Kliestik
Keyword(s):  
Graph Theory ◽  
Structural Analysis ◽  
Public Transportation ◽  
Transportation Networks ◽  
Logistics Management ◽  
Simulation Methods ◽  
Southern Poland ◽  
Transport Services ◽  
Network Simulations ◽  
Simulation Results

Abstract The main purpose of the paper was the structural analysis of the connections network used by a railway carrier Koleje Dolnośląskie S.A. operating in southern Poland. The analysis used simulation methods. The analysis and simulation were based on graph theory, which is successfully used in analysing a wide variety of networks (social, biological, computer, virtual and transportation networks). The paper presents indicators which allow judging the analysed connections network according to an appropriate level of transport services. Simulation results allowed proposing some modifications for the improvement of the analysed connections network. The paper also demonstrates that graph theory and network simulations should be used as tools by transportation companies during the stage of planning a connections network.

Computational Modelling and Simulation of Pedestrian Subsystem Impactor With Sedan Vehicle and Truck Model

2020 ◽  
Author(s):  
Obaidur Rahman Mohammed ◽  
D. V. Suresh ◽  
Hamid M. Lankarani
Keyword(s):  
Finite Element ◽  
Public Transportation ◽  
Injury Risk ◽  
Computational Modelling ◽  
Design Parameters ◽  
Euro Ncap ◽  
Pedestrian Accidents ◽  
Transport Safety ◽  
Simulation Results ◽  
Pedestrian Collisions

Abstract The increase in public transportation in the last decade has resulted in a larger pedestrian population and hence a larger number of pedestrian collisions. In the past, car-pedestrian accident prevention had been a challenge for automotive and transport safety members. Recent reports in car-pedestrian accidents have influenced many improvements to prioritize pedestrian protection for automotive industries. The number of pedestrian fatalities in U.S has raised in last decade proportionally, Car manufacturers, and transport investigation teams are implementing new product designs and adding new development methods to reduce the risk of pedestrian collisions. In this study, adult headform and upper legform is tested with a finite element vehicle model to examine the simulation results and injury behavior during impact. All finite element simulation tests are produced under Euro-NCAP Committee regulations. Finite element models are configured as per the regulation’s and testing criteria. Both upper legform impactor and adult headform finite simulation results are tested with assessing criteria limits. Finite simulation tests are carried on the LS-DYNA – Code platform. This comparative study between sedan and pickup finite vehicle models gives an injury risk prediction of pedestrian safety and assesses design parameters of automotive industries.

scholarly journals Estimating Cost Savings of Coordinating Regional Non-Emergency Human Transport Services

2010 ◽  
Author(s):  
Ryoichi Sakano ◽  
Julian Benjamin
Keyword(s):  
Public Transportation ◽  
Local Community ◽  
Operating Cost ◽  
Cost Savings ◽  
Transportation Systems ◽  
Transportation Services ◽  
Transport Services ◽  
Transportation Agencies ◽  
Human Transport ◽  
Current Operating

Local public transportation agencies provide a nonemergency human transport service to nearby hospitals and doctors' offices. Some users require specialized medical services at a hospital located out of the normal service area. In the Piedmont/Triad region of North Carolina, the Piedmont Authority for Regional Transportation (PART) began PART Connections in April 2004, to provide two daily transportation services between the Piedmont/Triad area and the UNC/Duke medical areas. Using current operating cost data of participating transportation systems, round-trip costs to the UNC/Duke medical areas from each county and to the nearest PART Connections stop are estimated. Given the actual number of passengers served by PART Connections during the first nine-month period of the service, the net saving in the operating cost by participating PART Connections is estimated for each system. Then, the total service hours saved by using PART Connections are estimated for each system, and are used to estimate the number of additional passengers served within the system. It is estimated that PART Connections could provide a net saving of $38,000 on operation expenses annually to the participating four county transportation systems. More importantly, PART Connections would enable the four county systems to provide more than 10,000 additional passenger trips within each county annually, by using the saved resources. In addition, 12 local community transportation providers in 15 western counties of the Piedmont/Triad region, which currently do not participate in PART Connections, are estimated to save a modest $9,600 in total annually, by using PART Connections.

scholarly journals KARAKTERISTIK PERGERAKAN PENUMPANG ANGKUTAN UMUM PERDESAAN DI KABUPATEN KUNINGAN

2021 ◽  
Vol 21 (2) ◽  
pp. 123-132
Author(s):  
Adinda Sekar Tanjung ◽  
Puspita Dirgahayani
Keyword(s):  
Rural Communities ◽  
Public Transport ◽  
Public Transportation ◽  
Rural Areas ◽  
Local Governments ◽  
Transport Services ◽  
Transportation Service ◽  
Movement Characteristics ◽  
Transportation Routes ◽  
Public Transport Services

Abstract   The demand for rural public transportation is dominated by people who cannot access private vehicles. In terms of the number of operating routes and the performance of their services, currently rural public transport services tend to decline. The mobility of rural communities to reach social facilities can be hampered if there is no public transportation service, which in turn will reduce the quality of human resources in rural areas. This study focuses on the movement characteristics of rural public transport passengers in Kuningan Regency. Several rural transportation routes were taken as samples, namely route 030 Cilimus-Linggarjati, route 061 Cilimus-Mandirancan, and route 037 Lengkong-Rancakeusik. This study shows that the characteristics of the movement of rural public transport passengers are an integral part in an effort to maintain rural public transport services. These characteristics of passenger movement can be used to improve the performance of public transportation, become input for public transport operators, and become material for local governments to make policies   Keywords: rural public transportation; public transport routes; public transport services; public transport performance.     Abstrak   Permintaan angkutan umum perdesaan didominasi oleh masyarakat yang tidak dapat mengakses kendaraan pribadi. Dari sisi jumlah trayek yang beroperasi dan kinerja layanannya, saat ini layanan angkutan umum perdesaan cenderung semakin menurun. Mobilitas masyarakat perdesaan untuk menjangkau fasilitas sosial dapat terhambat jika tidak ada layanan angkutan umum, yang pada akhirnya akan menurunkan kualitas sumber daya manusia di kawasan perdesaan. Studi ini berfokus pada karakteristik pergerakan penumpang angkutan umum perdesaan di Kabupaten Kuningan. Beberapa trayek angkutan perdesaan diambil sebagai sampel, yaitu trayek 030 Cilimus-Linggarjati, trayek 061 Cilimus-Mandirancan, dan trayek 037 Lengkong-Rancakeusik. Penelitian ini  menunjukkan bahwa karakteristik pergerakan penumpang angkutan umum perdesaan merupakan bagian yang tidak terpisahkan dalam upaya mempertahankan layanan angkutan umum perdesaan. Karakteristik pergerakan penumpang ini dapat digunakan untuk meningkatkan kinerja angkutan umum, menjadi masukan bagi operator angkutan umum, serta menjadi bahan pemerintah daerah untuk membuat kebijakan.   Kata-kata kunci: angkutan umum perdesaan; trayek angkutan umum; layanan angkutan umum; kinerja angkutan umum.

scholarly journals Application of Linear and Nonlinear Graphs in Structural Synthesis of Kinematic Chains

1973 ◽  
Vol 95 (2) ◽  
pp. 525-532 ◽  
Author(s):  
M. Huang ◽  
A. H. Soni
Keyword(s):  
Mathematical Model ◽  
Graph Theory ◽  
Structural Analysis ◽  
Three Dimensional ◽  
Structural Synthesis ◽  
Kinematic Chains ◽  
Piston Cylinder ◽  
General Constraints ◽  
Analysis And Synthesis ◽  
Linear And Nonlinear

Using graph theory and Polya’s theory of counting, the present paper performs structural synthesis and analysis of planar and three-dimensional kinematic chains. The Section 2 of the paper develops a mathematical model that permits one to perform structural analysis and synthesis of planar kinematic chains with kinematic elements such as revolute pairs, cam pairs, springs, belt-pulley, piston-cylinder, and gears. The theory developed is applied to enumerate eight-link kinematic chains with these kinematic elements. The Section 3 of the paper develops a mathematical model that permits one to perform structural analysis and synthesis of multi-loop spatial kinematic chains with higher and lower kinematic pairs. The theory developed is applied to enumerate all possible two-loop kinematic chains with or without general constraints.

Computing and Listing st-Paths in Public Transportation Networks

2017 ◽  
Vol 62 (3) ◽  
pp. 600-621 ◽  
Author(s):  
Kateřina Böhmová ◽  
Luca Häfliger ◽  
Matúš Mihalák ◽  
Tobias Pröger ◽  
Gustavo Sacomoto ◽  
...  
Keyword(s):  
Public Transportation ◽  
Transportation Networks

Structural Analysis and Mobility Test of Fourteen Links Kinematic Chain Using Graph Theory

2014 ◽  
Vol 592-594 ◽  
pp. 1165-1169
Author(s):  
Preeti Gulia ◽  
V.P. Singh
Keyword(s):  
Graph Theory ◽  
Structural Analysis ◽  
Incidence Matrix ◽  
Reliable Method ◽  
Kinematic Chain ◽  
Polynomial Equation ◽  
Degree Of Freedom ◽  
Mobility Test ◽  
Structural Problems ◽  
Algebraic Test

The present work is focused on the graph theory which is used for structural analysis of kinematic chain and identification of degree of freedom. A method based on graph theory is proposed in this paper to solve structural problems by using a suitable example of fourteen links kinematic chain. Purpose of this paper is to give an easy and reliable method for structural analysis of fourteen links kinematic chain. Here, a simple incidence matrix is used to represent the kinematic chain. The proposed method is applied for determining the characteristic polynomial equation of fourteen links kinematic chain. An algebraic test based on graph theory is also used for identifying degree of freedom of kinematic chain whether it is total, partial or fractionated degree of freedom.

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