scholarly journals Impact of coronavirus ( COVID ‐19) pandemic on air transport mobility, energy, and environment: A case study

2020 ◽  
Vol 44 (13) ◽  
pp. 10953-10961 ◽  
Author(s):  
Sandro Nižetić
Keyword(s):  
Air Transport ◽  
Energy And Environment ◽  
Transport Mobility

scholarly journals Monte Carlo Simulation for Economic Analysis of Hydropower Pumped Storage Project in Nepal

2013 ◽  
Vol 12 ◽  
pp. 39-44 ◽  
Author(s):  
Kaspar Vereide ◽  
Leif Lia ◽  
Laras Ødegård
Keyword(s):  
Monte Carlo ◽  
Economic Analysis ◽  
Net Present Value ◽  
Simulation Method ◽  
Construction Costs ◽  
Energy And Environment ◽  
Pumped Storage ◽  
High Degree ◽  
Mc Method

Investments in hydropower pumped storage projects (PSP) are subjected to a high degree of uncertainty. In addition to normal uncertainties in hydropower schemes, the profit of a pumped storage scheme is dependent on the margin between power prices for buying and selling, which is difficult to predict without a power purchase agreement (PPA). A PSP without a PPA and without known construction costs requires quantification of the uncertainties in order to make qualified decisions before investing in such projects. This article demonstrates the advantages of using Monte Carlo (MC) simulations as a tool in the economic analysis of PSPs. The method has been tested on a case study, namely the Tamakoshi-3 Hydropower Project (HPP) in Nepal. The MC method is used to calculate the probability distribution of the net present value of installing reversible units in the Tamakoshi-3 HPP. The calculations show that PSPs may be profitable in Nepal, given a beneficial development of the power market. The MC method is considered to be a useful tool for economic analysis of PSPs. In this case study of installing reversible units in the Tamakoshi-3 HPP, there are many uncertainties, which the MC simulation method is able to quantify. Hydro Nepal; Journal of Water, Energy and Environment Vol. 12, 2013, January Page: 39-44DOI: http://dx.doi.org/10.3126/hn.v12i0.9031 Uploaded Date : 10/29/2013

Study on Energy-Saving Product Concept Design Based on TRIZ and Function Analysis

2010 ◽  
Vol 156-157 ◽  
pp. 123-126 ◽  
Author(s):  
Fu Ying Zhang ◽  
Hong Chao Zhang ◽  
Hui Zheng ◽  
Qing Qing Zhang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Function Analysis ◽  
New Product ◽  
Concept Design ◽  
Energy And Environment ◽  
Product Concept ◽  
Product Function ◽  
And Function

The energy consumption and environmental impacts of a product are largely determined during concept design. It is the core for energy saving product development to integrate energy saving into product concept design process. In this paper, a framework for energy-saving product concept design based on TRIZ/function analysis is proposed, the energy flow chart is built based on the analysis of product function. By eliminating the harmful function associated with energy and environment, resolving the conflict parameter and attributes of components in energy and function, the new product that satisfy user needs while minimizing energy consumption is obtained. A case study is also presented to illustrate the effectiveness of the proposed design framework.

scholarly journals Robustness and Edge Addition Strategy of Air Transport Networks: A Case Study of “the Belt and Road”

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 96470-96477
Author(s):  
Lu Zhang ◽  
Hongru Du ◽  
Xiaolei Zhang ◽  
Philippe De Maeyer ◽  
Bart Dessein ◽  
...  
Keyword(s):  
Air Transport ◽  
Transport Networks ◽  
Air Transport Networks ◽  
Belt And Road ◽  
The Belt And Road ◽  
Edge Addition

Challenges and Solutions to Air Transportation in Guinea: A Case Study on the Revival of the National Airline

2019 ◽  
Vol 54 (6) ◽  
pp. 858-879
Author(s):  
Zhao Xu ◽  
Mamoudou Dioumessy
Keyword(s):  
Economic Growth ◽  
Air Transportation ◽  
Air Transport ◽  
Diagnostic Analysis ◽  
Current State ◽  
Long Run ◽  
Positive Spillover ◽  
Set Up

After the dissolution of the first national airline in 2002, the Guinean government attempted to set up Guinea Airlines, but it was unsuccessful. This study aims to analyze the current state of air transport in Guinea and to conduct a diagnostic analysis for the revival of the national airline. The objective is to explore the causes of the failures of various attempts to revive the national company. The findings show that air transport has a positive spillover externality to economic long-run growth and the revival of Guinea Airlines could be a major asset to boost the country’s economic growth.

Transnational Institutions in Developing Countries: The Case of Iranian Civil Aviation

2006 ◽  
Vol 27 (1) ◽  
pp. 53-77 ◽  
Author(s):  
Michael Carney ◽  
Mehdi Farashahi
Keyword(s):  
Developing Countries ◽  
World War Ii ◽  
Policy Implications ◽  
Air Transport ◽  
Civil Aviation ◽  
Organizational Practice ◽  
International Civil Aviation Organization ◽  
World War ◽  
Technical Factors

The proliferation of transnational institutions in the form of protocols, conventions, regimes and standards is a growing influence on organizational practice. Recent work on the origins and impact of transnational institutions focuses upon processes in ‘core’ states, but their influence in developing countries has not received much attention. In this paper we narrate a case study of the diffusion of two institutional regimes represented by the International Civil Aviation Organization (ICAO) and the International Air Transport Association (IATA) in Iranian civil aviation. The case study describes a seemingly frictionless and uncontested embedding of the emergent international aviation regime in post-World War II Iran and a severe challenge to those institutions in the years following Iran's Islamic revolution. We characterize the rise and decline of these regimes as a double process of institutionalization and de-institutionalization, and identify political and technical factors that drive institutional change. We discuss several theoretical and policy implications stemming from the experience of transnational aviation institutions in Iran.

scholarly journals Determination of switching costs of air transport services - Case study: Santa Genoveva Airport; line Goiânia - Guarulhos

2017 ◽  
Vol 25 ◽  
pp. 2797-2808
Author(s):  
Willker W.F. Vieria ◽  
Marcos A.A. Mendonça ◽  
Fernando O.M. Torres ◽  
Willer L. Carvalho
Keyword(s):  
Switching Costs ◽  
Air Transport ◽  
Transport Services

scholarly journals Analysis of Network Robustness in Weighted and Unweighted Approaches: A Case Study of the Air Transport Network in the Belt and Road Region

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Lu Zhang ◽  
Yannan Zhao ◽  
Dongli Chen ◽  
Xinhuan Zhang
Keyword(s):  
Global Economy ◽  
Transport Network ◽  
Clustering Coefficient ◽  
Network Robustness ◽  
Air Transport ◽  
Degree Centrality ◽  
Study Results ◽  
Belt And Road ◽  
The Belt And Road

Aviation transport is one of the most important and critical infrastructures in today’s global economy. Failure in its proper operations can seriously impact regional economic development, which is why it is important to evaluate network robustness. Previous analyses of robustness have mainly been conducted with an unweighted approach. In the development of air transport, however, the demand for route configuration has gradually decreased, while the demand for flight adjustments has increased. Consequently, the aviation network has developed unevenly, so adhering to a uniform approach for evaluating network robustness may lead to inaccurate results. Therefore, we examined which centrality sequence is the most sensitive to network robustness in both unweighted and weighted approaches. The air transport network selected for the case study comprised the six subregions of the Eurasian landmass of the Belt and Road region. The study results showed the following: (a) in the network constructed as an unweighted one, betweenness, and degree centrality had higher priorities in preserving network functionalities than eigenvector and closeness centrality; (b) in the network constructed as a weighted one, recursive power had a higher priority in preserving network functionalities than recursive centrality; and (c) no particular centrality measurement had a significant advantage in representing the totality of robustness. The betweenness centrality sequence was sensitive to the average shortest path length and global efficiency; the recursive power sequence was sensitive to the clustering coefficient, while degree centrality was sensitive to graph diversity. The findings of this study support the decisions about managing air transportation in the Belt and Road region.

Sign in / Sign up

Export Citation Format

Share Document