scholarly journals An Integrated Methodology for the Multi-Objective Optimization of Port Railway Capacity: The Case Study of the Port of Trieste

2021 ◽  
Vol 13 (19) ◽  
pp. 10490
Author(s):  
Caterina Caramuta ◽  
Giovanni Longo ◽  
Teresa Montrone ◽  
Carlo Poloni
Keyword(s):  
Railway Network ◽  
Operational Conditions ◽  
Environmentally Sustainable ◽  
Integrated Methodology ◽  
Traffic Volumes ◽  
Residual Capacity ◽  
Railway Capacity ◽  
Administrative Tasks

The relevant pressure exerted on ports following the advent of globalization and containerization has contributed to transform the role of such intermodal transport facilities, increasing their complexity with reference to both performed activities and involved actors. The potential of solid hinterland connections in enhancing port competitiveness has sustained the larger embracement of the railway mode, which has proved to be a financially and environmentally sustainable solution, especially on long hauls. However, the limited residual capacity currently characterizing several railway network and nodes may threaten the accommodation of additional future traffic volumes and, thus, it requires the adoption of a coordinated strategy to more efficiently manage existing railway infrastructures, other than the realization of some new ones. In this regard, an integrated methodology has been developed to specifically model, simulate and optimize port railway processes, as part of a more complex system, imposing the maximization of capacity with the concurrent minimization of used shunting locomotives, to varying of infrastructural and operational conditions. This combination of techniques has been applied to the case study of the Port of Trieste, Italy, showing the greater influence of tracks availability over changes in the operational conditions, in terms of a shorter duration of specific administrative tasks and the employment of more shunting locomotives.

scholarly journals Investigating the Role of Traffic Volumes on the Occurrence of the Accidents on the National Roads: a Case Study in Romania

2017 ◽  
Vol 12 (2) ◽  
pp. 20-29
Author(s):  
Rodica Dorina CADAR ◽  
Melania Rozalia BOITOR ◽  
Mara DUMITRESCU
Keyword(s):  
Traffic Volumes

Managing Complexity and Institutionalization

2005 ◽  
pp. 160-175
Author(s):  
Brian Corbitt ◽  
Konrad Peszynski ◽  
Olaf Boon
Keyword(s):  
Higher Education ◽  
Power Relations ◽  
Erp Implementation ◽  
The Social ◽  
Managing Complexity ◽  
Administrative Tasks

This chapter reports a case study of ERP implementation in an institution of higher education. The ERP is one based on integration of administrative tasks based on Oracle® systems and is successful both in terms of its embeddedness in institutionalized practice and in supporting that university’s operations. The key issue that emerged from the study showed that understanding complexity, institutionalized practice, and the power relations in existence enable the implementation to be more effective, as it can be managed when understood. The chapter argues that organizations reproduce practice and that an ERP challenges that. To deal with that challenge, social dramas emerge wherever power exists, and the resulting conflicts challenge the effectiveness of the systems put in place. In this case study, the key role of the project champion in resolving the social dramas became evident.

scholarly journals A Sensitivity Analysis of Train Speed and its Effect on Railway Capacity

2014 ◽  
Vol 1061-1062 ◽  
pp. 1208-1212
Author(s):  
Bayan Bevrani ◽  
Robert Burdett ◽  
Prasad K.D.V. Yarlagadda
Keyword(s):  
Sensitivity Analysis ◽  
Cost Effective ◽  
Railway Network ◽  
Capacity Model ◽  
The Future ◽  
Railway System ◽  
Train Speed ◽  
The Absolute ◽  
Railway Capacity

Increasing train speeds is conceptually a simple and straight forward method to expand railway capacity, for example in comparison to other more extensive and elaborate alternatives. In this article an analytical capacity model has been investigated as a means of performing a sensitivity analysis of train speeds. The results of this sensitivity analysis can help improve the operation of this railway system and to help it cope with additional demands in the future. To test our approach a case study of the Rah Ahane Iran (RAI) national railway network has been selected. The absolute capacity levels for this railway network have been determined and the analysis shows that increasing trains speeds may not be entirely cost effective in all circumstances.

scholarly journals Modelling the Accessibility Classification of Railway Lines: A case study of Northeast China railway network

2013 ◽  
Vol 25 (5) ◽  
pp. 467-474 ◽  
Author(s):  
Mian Yang ◽  
Y.J. Wang
Keyword(s):  
Northeast China ◽  
Decision Support Tool ◽  
Strategic Decision ◽  
Classification Model ◽  
Railway Network ◽  
Support Tool ◽  
China Railway

A major problem addressed in railway network planning relates to distinguishing the role of the railway line in the network, and making a reasonable classification of the lines based on their role. Accessibility has been widely used to measure the role of transportation infrastructure in various studies, but few quantitative models for the classification of the role have been presented yet. In this paper, the line accessibility classification model is proposed, which aims to distinguish the role of railway lines in the network and to classify the lines into different grades. The practicability of the model is demonstrated through the case study of Northeast China railway network where the railway lines in Northeast China can be classified into three grades. The line accessibility classification model is supposed to be a strategic decision support tool for planners and policy makers to determine the classification of railway lines.

The role of multiplicity in a cult: A case study

1987 ◽  
Author(s):  
William A. Worrall ◽  
Ann W. Stockman

Endangered Butterflies and their Non-Native Host Plants: Examining Shifting Values of Belonging in Restoration

2019 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Robert M. Anderson ◽  
Amy M. Lambert
Keyword(s):  
Ecological Restoration ◽  
Native Species ◽  
Puget Sound ◽  
A Value ◽  
The Social ◽  
Remote Island ◽  
Scientific Truth ◽  
Native Host

The island marble butterfly (Euchloe ausonides insulanus), thought to be extinct throughout the 20th century until re-discovered on a single remote island in Puget Sound in 1998, has become the focus of a concerted protection effort to prevent its extinction. However, efforts to “restore” island marble habitat conflict with efforts to “restore” the prairie ecosystem where it lives, because of the butterfly’s use of a non-native “weedy” host plant. Through a case study of the island marble project, we examine the practice of ecological restoration as the enactment of particular norms that define which species are understood to belong in the place being restored. We contextualize this case study within ongoing debates over the value of “native” species, indicative of deep-seated uncertainties and anxieties about the role of human intervention to alter or manage landscapes and ecosystems, in the time commonly described as the “Anthropocene.” We interpret the question of “what plants and animals belong in a particular place?” as not a question of scientific truth, but a value-laden construct of environmental management in practice, and we argue for deeper reflexivity on the part of environmental scientists and managers about the social values that inform ecological restoration.

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