scholarly journals Delay Management in Regional Railway Transport

2022 ◽  
Vol 12 (1) ◽  
pp. 457
Author(s):  
Rudolf Vávra ◽  
Vít Janoš
Keyword(s):  
Public Transport ◽  
Critical Path ◽  
Waiting Times ◽  
Essential Element ◽  
Railway Transport ◽  
Delay Management ◽  
The Czech Republic ◽  
Railway Traffic ◽  
Negative Impacts

This article is focused on the reliability of transfer connections in regional railway transport. The reliability of the transportation chain in public transport is an essential element for functional, attractive, and long-term sustainable public transport. This article discusses the causes and consequences of railway traffic disruption and related impacts on passenger transfer connections. To reduce the negative impacts of common operational disruptions, the authors present an original approach for determining transfer waiting times between delayed trains based on a modified critical path method (CPM). In addition, an example of the implementation of this method in regional railway transport in the Vysočina Region of the Czech Republic is provided.

scholarly journals Regional Railway Transport in Czech, Austrian and German Decentralised and Regionalised Transport Markets

2015 ◽  
Vol 15 (4) ◽  
pp. 431-450 ◽  
Author(s):  
Daniel Seidenglanz ◽  
Tomáš Nigrin ◽  
Jiří Dujka
Keyword(s):  
Czech Republic ◽  
Case Studies ◽  
Public Transport ◽  
Public Transportation ◽  
Railway Transport ◽  
The Czech Republic ◽  
Central European ◽  
Organisational Form ◽  
Train Services ◽  
Comparative Case Studies

Abstract The article analyses railway transport markets in three neighbouring Central European countries: the Czech Republic, Austria and Germany (specifically Bavaria and Saxony), with a focus on regional transportation. It examines the organisational form of public transport resulting from regionalisation and provides comparative case studies of regional train services in these countries. The article points out the organisational differences in public transportation between the studied regions and tries to connect these results with the supply of regional train services on various types of lines and in different geographical areas.

scholarly journals Public Transport to the Airport and Its Influence on Handling Process

2019 ◽  
Vol 7 (1) ◽  
pp. 6-11
Author(s):  
Slobodan Stojić ◽  
Vladimir Pazdro ◽  
Roman Vokáč
Keyword(s):  
Public Transport ◽  
Waiting Times ◽  
Control Process ◽  
Business Environment ◽  
Airport Security ◽  
The Czech Republic ◽  
The Public ◽  
Mass Public ◽  
The Impact ◽  
The Given

The paper focuses on several possibilities of the mass public transport to the airport, including analyses of the expected impact on the various airport processes. Within the article, three main transportation system types will be described and compared. Firstly, the problem regarding current bus transfer system to the Václav Havel airport Prague will be analyzed. According to the analysis results the focus now turns to the description of the potential influence of the introduction of the new transfer systems, including the impact on the airport security and passport control process, and other procedures, which include some kind of a queuing process. This airport was chosen as the biggest airport in the Czech Republic, which in today and future business environment could expect problems related to the public transport of the passengers to and from the airport. Besides the description of the current structure, the paper tries to elaborate issues such as calculation of the queue waiting times and to propose a new system, more suitable for the given conditions. Results of the research include various calculations, such dependence of a modal split and intervals of the waiting times within a check-in process.

scholarly journals Sustainability of passenger transport as a precondition for fulfilling the 4.0 company concept – analysis of trends in the Czech Republic

2021 ◽  
Vol 91 ◽  
pp. 01032
Author(s):  
Jana Hinke ◽  
Veronika Komorousová
Keyword(s):  
Czech Republic ◽  
Public Interest ◽  
Public Transport ◽  
Passenger Transport ◽  
The Czech Republic ◽  
The Public ◽  
Long Period ◽  
Increasing Trend ◽  
Long Term Trend

Strengthening public transport can significantly contribute to transport sustainability, in particular to reducing greenhouse gas emissions. This article primarily aims to analyse the long-term trend in the production of carbon dioxide by individual types of transport throughout the Czech Republic and to compare the performance of public passenger transport and passenger car transport. The analysis concludes that the performance of public passenger transport by land in the Czech Republic has not been increasing over a long period; on the contrary, individual transport has been strengthening. There has been an increasing trend in CO2 emissions from transport for a long period. Thus, the development of subsidies in the public transport clearly shows that to fund public passenger transport is in the public interest.

The Economics of Commodities and Commodity Markets

2018 ◽  
Author(s):  
Florian Ielpo
Keyword(s):  
Raw Materials ◽  
Commodity Prices ◽  
Essential Element ◽  
Commodity Markets ◽  
Production Costs ◽  
Demand And Supply ◽  
Spot Prices ◽  
Supply Shocks ◽  
The Business Cycle

This chapter covers the economic fundamentals of commodity markets (i.e., what shapes the evolution of the price of raw materials) in three steps. First, it covers the theories explaining why the futures curve can be upward or downward sloping, an essential element for commodity producing companies. The evolution of inventories and hedging pressures are the two dominant sources of explanation. Second, the chapter reviews the fundamentals of commodity spot prices: technologies, supply, demand, and speculation. Production costs draw the long-term evolution of prices, but demand and supply shocks can trigger substantial variations in commodity prices. Third, the chapter presents how commodity prices interact with the business cycle. Commodities are influenced by the world activity but can also have a material impact on it.

Taken For A Ride

2017 ◽  
Author(s):  
Matteo Rizzo
Keyword(s):  
Public Transport ◽  
Urban Poor ◽  
Dar Es Salaam ◽  
Political Organization ◽  
Bus Rapid Transit ◽  
The Political ◽  
Urban Experience ◽  
Economic Interests ◽  
Informal Economies

The growth of cities and informal economies are two central manifestations of globalization in the developing world. Taken for a Ride addresses both, drawing on long-term fieldwork in Dar es Salaam (Tanzania) and charting its public transport system’s journey from public to private provision. The book investigates this shift alongside the increasing deregulation of the sector and the resulting chaotic modality of public transport. It reviews state attempts to regain control over public transport, the political motivations behind these, and their inability to address its problems. The analysis documents how informal wage relations prevailed in the sector, and how their salience explains many of the inefficiencies of public transport. The changing political attitude of workers towards employers and the state is investigated: from an initial incapacity to respond to exploitation, to political organization and unionization, which won workers concessions on labour rights. A longitudinal study of workers throws light on patterns of occupational mobility in the sector. The book ends with an analysis of the political and economic interests that shaped the introduction of Bus Rapid Transit in Dar es Salaam and local resistance to it. Taken for a Ride is an interdisciplinary political economy of public transport, exposing the limitations of market fundamentalist and postcolonial scholarship on economic informality and the urban experience in developing countries, and its failure to locate the agency of the urban poor within their economic and political structures. It is both a contribution to and a call for the contextualized study of ‘actually existing neoliberalism’.

scholarly journals Case Study on Fire Resistance of Sandwiches for Means of Transport

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 207
Author(s):  
Pavel Koštial ◽  
Zora Koštialová Jančíková ◽  
Robert Frischer
Keyword(s):  
Fire Resistance ◽  
Fire Protection ◽  
Public Transport ◽  
Hybrid Vehicles ◽  
Safety Requirements ◽  
Different Types ◽  
Aluminum Honeycomb ◽  
Heat Loads

These days there are undeniably unique materials that, however, must also meet demanding safety requirements. In the case of vehicles, these are undoubtedly excellent fire protection characteristics. The aim of the work is to experimentally verify the proposed material compositions for long-term heat loads and the effect of thickness, the number of laminating layers (prepregs) as well as structures with different types of cores (primarily honeycomb made of Nomex paper type T722 of different densities, aluminum honeycomb and PET foam) and composite coating based on a glass-reinforced phenolic matrix. The selected materials are suitable candidates for intelligent sandwich structures, usable especially for interior cladding applications in the industry for the production of means of public transport (e.g., train units, trams, buses, hybrid vehicles).

scholarly journals Stand against anti-Asian racial discrimination during COVID-19: A call for action

2020 ◽  
pp. 002087282097061
Author(s):  
Qin Gao ◽  
Xiaofang Liu
Keyword(s):  
United States ◽  
Social Media ◽  
Racial Discrimination ◽  
Asian Americans ◽  
Well Being ◽  
Political Rhetoric ◽  
The United States ◽  
Psychological Well Being ◽  
Negative Impacts

Racial discrimination against people of Chinese and other Asian ethnicities has risen sharply in number and severity globally amid the COVID-19 pandemic. This rise has been especially rapid and severe in the United States, fueled by xenophobic political rhetoric and racist language on social media. It has endangered the lives of many Asian Americans and is likely to have long-term negative impacts on the economic, social, physical, and psychological well-being of Asian Americans. This essay reviews the prevalence and consequences of anti-Asian racial discrimination during COVID-19 and calls for actions in practice, policy, and research to stand against it.

scholarly journals Statistical Estimates of the Pulsar Glitch Activity

Universe ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 8
Author(s):  
Alessandro Montoli ◽  
Marco Antonelli ◽  
Brynmor Haskell ◽  
Pierre Pizzochero
Keyword(s):  
Linear Regression ◽  
Upper Bound ◽  
Bootstrap Method ◽  
Waiting Times ◽  
Statistical Estimates ◽  
Equal Variance ◽  
Linear Fit ◽  
The Moment ◽  
The Bootstrap Method

A common way to calculate the glitch activity of a pulsar is an ordinary linear regression of the observed cumulative glitch history. This method however is likely to underestimate the errors on the activity, as it implicitly assumes a (long-term) linear dependence between glitch sizes and waiting times, as well as equal variance, i.e., homoscedasticity, in the fit residuals, both assumptions that are not well justified from pulsar data. In this paper, we review the extrapolation of the glitch activity parameter and explore two alternatives: the relaxation of the homoscedasticity hypothesis in the linear fit and the use of the bootstrap technique. We find a larger uncertainty in the activity with respect to that obtained by ordinary linear regression, especially for those objects in which it can be significantly affected by a single glitch. We discuss how this affects the theoretical upper bound on the moment of inertia associated with the region of a neutron star containing the superfluid reservoir of angular momentum released in a stationary sequence of glitches. We find that this upper bound is less tight if one considers the uncertainty on the activity estimated with the bootstrap method and allows for models in which the superfluid reservoir is entirely in the crust.

scholarly journals A vulnerable age group: the impact of cancer on the psychosocial well-being of young adult childhood cancer survivors

2021 ◽  
Author(s):  
L. M. E. van Erp ◽  
H. Maurice-Stam ◽  
L. C. M. Kremer ◽  
W. J. E. Tissing ◽  
H. J. H. van der Pal ◽  
...  
Keyword(s):  
Young Adults ◽  
Young Adult ◽  
Cancer Survivors ◽  
Childhood Cancer ◽  
Psychosocial Outcomes ◽  
Well Being ◽  
Childhood Cancer Survivors ◽  
Negative Impacts ◽  
Time Since Diagnosis

Abstract Purpose This study aimed to increase our understanding of the psychosocial well-being of young adult childhood cancer survivors (YACCS) as well as the positive and negative impacts of cancer. Methods YACCS (aged 18–30, diagnosed ≤ 18, time since diagnosis ≥ 5 years) cross-sectionally filled out the “Pediatric Quality of Life Inventory Young Adults” (PedsQL-YA), “Hospital Anxiety and Depression Scale” (HADS), and “Checklist Individual Strengths” (CIS-20R) to measure fatigue and survivor-specific “Impact of Cancer - Childhood Survivors” (IOC-CS), which measures the long-term impact of childhood cancer in several domains. Descriptive statistics (IOC-CS), logistic regression (HADS, CIS-20R), and ANOVA (PedsQL-YA, HADS, CIS-20R) were performed. Associations between positive and negative impacts of childhood cancer and psychosocial outcomes were examined with linear regression analyses. Results YACCS (N = 151, 61.6% female, mean age 24.1 ± 3.6, mean time since diagnosis 13.6 ± 3.8) reported lower HRQOL (− .4 ≤ d ≤ − .5, p ≤ .001) and more anxiety (d = .4, p ≤ .001), depression (d = .4, p ≤ .01), and fatigue (.3 ≤ d ≤ .5, p ≤ .001) than young adults from the general Dutch population. They were at an increased risk of experiencing (sub)clinical anxiety (OR = 1.8, p = .017). YACCS reported more impact on scales representing a positive rather than negative impact of CC. Various domains of impact of childhood cancer were related to psychosocial outcomes, especially “Life Challenges” (HRQOL β = − .18, anxiety β = .36, depression β = .29) and “Body & Health” (HRQOL β = .27, anxiety β = − .25, depression β = − .26, fatigue β = − .47). Conclusion YACCS are vulnerable to psychosocial difficulties, but they also experience positive long-term impacts of childhood cancer. Positive and negative impacts of childhood cancer were associated with psychosocial outcomes in YACCS. Screening of psychosocial outcomes and offering targeted interventions are necessary to optimize psychosocial long-term follow-up care for YACCS.

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