scholarly journals Applying a Mesoscopic Transport Model to Analyse the Effects of Urban Freight Regulatory Measures on Transport Emissions—An Assessment

2018 ◽  
Vol 10 (7) ◽  
pp. 2515 ◽  
Author(s):  
Jacek Oskarbski ◽  
Daniel Kaszubowski
Keyword(s):  
Transport Model ◽  
Chain Structure ◽  
Mesoscopic Transport ◽  
Specific Data ◽  
Urban Freight ◽  
Reliable Assessment ◽  
Private And Public ◽  
Regulatory Measures ◽  
Supply Chain Structure ◽  
Transport Emissions

Sustainable urban freight management is a growing challenge for local authorities due to social pressures and increasingly more stringent environmental protection requirements. Freight and its adverse impacts, which include emissions and noise, considerably influence the urban environment. This calls for a reliable assessment of what can be done to improve urban freight and meet stakeholders’ requirements. While changes in a transport system can be simulated using models, urban freight models are quite rare compared to the tools available for analysing private and public transport. Therefore, this article looks at ways to extend Gdynia’s existing mesoscopic transport model by adding data from delivery surveys and examines the city’s capacity for reducing CO2 emissions through the designation of dedicated delivery places. The results suggest that extending the existing model by including freight-specific data can be justified when basic regulatory measures are to be used to improve freight transport. There are, however, serious limitations when an exact representation of the urban supply chain structure is needed, an element which is required for modelling advanced measures.

scholarly journals Optimal Supply Chain Structure for Distributing Essential Drugs in Low Income Countries: Results from a Randomized Experiment

2015 ◽  
Author(s):  
Monique Vledder ◽  
Jed Friedman ◽  
Mirja Sjjblom ◽  
Thomas Brown ◽  
Prashant Yadav
Keyword(s):  
Supply Chain ◽  
Low Income ◽  
Chain Structure ◽  
Low Income Countries ◽  
Randomized Experiment ◽  
Essential Drugs ◽  
Supply Chain Structure

scholarly journals Modelling Spatiotemporal Dynamics of Large Wood Recruitment, Transport, and Deposition at the River Reach Scale during Extreme Floods

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1134 ◽  
Author(s):  
Andreas Zischg ◽  
Niccolo Galatioto ◽  
Silvana Deplazes ◽  
Rolf Weingartner ◽  
Bruno Mazzorana
Keyword(s):  
Simulation Model ◽  
Transport Model ◽  
Large Wood ◽  
Flow Paths ◽  
Extreme Floods ◽  
Reliable Assessment ◽  
Extreme Flood ◽  
Floodplain Inundation ◽  
Irregular Meshes ◽  
River Reach

Large wood (LW) can lead to clogging at bridges and thus cause obstruction, followed by floodplain inundation. Moreover, colliding logs can cause severe damage to bridges, defense structures, and other infrastructure elements. The factors influencing spatiotemporal LW dynamics (LWD) during extreme floods vary remarkably across river basins and flood scenarios. However, there is a lack of methods to estimate the amount of LW in rivers during extreme floods. Modelling approaches allow for a reliable assessment of LW dynamics during extreme flood events by determining LW recruitment, transport, and deposition patterns. Here, we present a method for simulating LWD on a river reach scale implemented in R (LWDsimR). We extended a previously developed LW transport model with a tree recognition model on the basis of Light Detection and Ranging (LiDAR) data for LW recruitment simulation. In addition, we coupled the LWD simulation model with the hydrodynamic simulation model Basic Simulation Environment for Computation of Environmental Flow and Natural Hazard Simulation (BASEMENT-ETH) by adapting the existing LW transport model to be used on irregular meshes. The model has been applied in the Aare River basin (Switzerland) to quantify mobilized LW volumes and the associated flow paths in a probable maximum flood scenario.

The relationship between internal supply chain structure and operational performance: survey results from Japanese manufacturers

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mikihisa Nakano ◽  
Kazuki Matsuyama
Keyword(s):  
Supply Chain ◽  
Structural Properties ◽  
Operations Management ◽  
Chain Structure ◽  
Operational Performance ◽  
Equation Modeling ◽  
Content Type ◽  
Wide Range ◽  
Supply Chain Structure ◽  
The Relationship

Purpose The purpose of this paper is to discuss the roles of a supply chain management (SCM) department. To achieve that, this study empirically examines the relationship between internal supply chain structure and operational performance, using survey data collected from 108 Japanese manufacturers. Design/methodology/approach Based on a literature review of not only organizational theory but also other fields such as marketing, logistics management, operations management and SCM, this study focused on two structural properties, formalization and centralization and divided operational performance to firm-centric efficiency and customer-centric responsiveness. To examine the analytical model using these dimensions, this study conducted a structural equation modeling. Findings The correlation between centralization of operational tasks and centralization of strategic tasks, the impacts of centralization of both tasks on formalization and the effect of formalization on responsiveness performance were demonstrated. In addition, the reasons for formalization not positively influencing efficiency performance were explored through follow-up interviews. Practical implications Manufacturers need to formalize, as much as possible, a wide range of SCM tasks to realize operational excellence. To establish such formalized working methods, it is effective to centralize the authorities of both operational and strategic tasks in a particular department. In addition, inefficiency due to strict logistics service levels is a problem that all players involved in the supply chain of various industries should work together to solve. Originality/value The theoretical contribution of this study is that the authors established an empirical process that redefined the constructs of formalization and centralization, developed these measures and examined the impacts of these structural properties on operational performance.

When platform exploits data analysis advantage: change of OEM-led supply chain structure

2021 ◽  
Author(s):  
Ping Yan ◽  
Jun Pei ◽  
Ya Zhou ◽  
Panos M. Pardalos
Keyword(s):  
Supply Chain ◽  
Data Analysis ◽  
Chain Structure ◽  
Supply Chain Structure

Supply Chain Structure as a Critical Driver of Sustainable Supplier Practices

2011 ◽  
pp. 195-219
Author(s):  
Amrou Awaysheh ◽  
Robert D. Klassen
Keyword(s):  
Supply Chain ◽  
Chain Structure ◽  
Supply Chain Structure
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