Air traffic management and energy efficiency: the free flight concept

Coletsos, John; Ntakolia, Charis

doi:10.1007/s12667-015-0165-5

Cited by 8 publications

(5 citation statements)

References 23 publications

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“…The air transport industry is a sector whose operations are strongly associated with negative externalities (Janić, ) and a much discussed boomerang effect (Evans & Schäfer, ). The concept of sustainable aviation and the air transport developmental regime is already contested (Coletsos & Ntakolia, ; Walker & Cook, ). In this context, materiality assessment has been adopted by airport operators in recent years as a management tool of internal analysis.…”

Section: Discussionmentioning

confidence: 99%

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Sustainability reporting, materiality, and accountability assessment in the airport industry

et al. 2019

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Air travel is, nowadays, recognized as being one of the most popular modes of transport. Air transport is among the most significant contributors to the world gross domestic product and is accountable for a great environmental and social impact. Driven by the well‐established sustainability discourse and the vital role businesses can play in disseminating the sustainable development concept, this paper attempted to map airport industry's most material operational aspects and assess airport operators' accountability level on disclosing corporate information regarding airports' economic, environmental, and social performance. In this context, 33 reports and 903 material issues representing 193 international airports were reviewed and assessed, and a methodology for benchmarking the accountability level of best reporting airport operators was developed, showcasing materiality assessment as a useful management tool for strengthening airport operators' business strategy and enhancing their corporate performance. The paper indicated that (a) customer focus (i.e., health, safety and satisfaction), economic viability, and business continuity and preparedness are operational aspects of high materiality and (b) the disclosure level, especially concerning specific performance indicators, is still moderate. In conclusion, this study has shown that materiality assessment gains ground as a management tool among airports' management teams and the completeness of Sustainability reports is positively correlated with the “level” of adherence as described by the Global Reporting Initiative.

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Section: Discussionmentioning

confidence: 99%

“…(Evans & Schäfer, 2013). The concept of sustainable aviation and the air transport developmental regime is already contested (Coletsos & Ntakolia, 2015;Walker & Cook, 2009). In this context, materiality assessment has been adopted by airport operators in recent years as a management tool of internal analysis.…”

Section: Discussion On Materiality Assessmentmentioning

confidence: 99%

Sustainability reporting, materiality, and accountability assessment in the airport industry

et al. 2019

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“…The current study was focused on the ATM problem with respect to new procedures, such as free route, in terms of safety and effectiveness. The study was triggered by and aligned with the following performance objectives set by EUROCONTROL and the European Commission: (1) to improve ATM safety whilst accommodating air traffic growth; (2) to increase ATM network efficiency; (3) to strengthen ATM's contribution to aviation security and to environmental objectives; (4) to match capacity and air transport growth [2].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Conflict Resolution Methods in Air Traffic Management

et al. 2022

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Aircraft fly en route under concurrent event situations (conflicting situations), which occur when they operate in the same airspace but are too close to each other in the same time frame. Hence, the safe horizontal distance between them is not less than the standard 5 nm. Free route airspace is such a concept, where such concurrent events need to be resolved when the location and number of such event “hotspots” are random in comparison with fixed route (conventional) airspace. This paper proposes two approaches to solving the traffic conflict in the sector by performing horizontal resolution maneuvers. The first of them uses the Dubins trajectory, while the second one uses a three-fold change of heading (3HC) method (for two types of angles). Apart from maintaining safe separation, we compared them, taking as a criterion the extension of the flight path of aircraft involved in the conflict, as the length of the flight is the primary factor determining flight time/delays and the increase in fuel consumption and greenhouse gas emissions. There may be other algorithms depending on the different data that can be identified through further research.

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“…Geographic information system (GIS) in combination with online libraries for street information has played a significant role in the development of efficient methodologies for addressing the problem of RP. Although a considerable attention has been given to air traffic management [1,2], transportation [3,4] and robot navigation [5], a little attention has been given to route planning for supporting the sensitive social groups, such as the elderly, or individuals with disabilities. Outdoor environmental barriers, such as moving obstacles and pavement conditions, cultivate the feeling of loss of independence among aging individuals, or individuals with mobility and vision limitations.…”

Section: Introductionmentioning

confidence: 99%

A route planning framework for smart wearable assistive navigation systems

Ntakolia

Iakovidis

2021

SN Appl. Sci.

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Route planning (RP) enables individuals to navigate in unfamiliar environments. Current RP methodologies generate routes that optimize criteria relevant to the traveling distance or time, whereas most of them do not consider personal preferences or needs. Also, most of the current smart wearable assistive navigation systems offer limited support to individuals with disabilities by providing obstacle avoidance instructions, but often neglecting their special requirements with respect to the route quality. Motivated by the mobility needs of such individuals, this study proposes a novel RP framework for assistive navigation that copes these open issues. The framework is based on a novel mixed 0–1 integer nonlinear programming model for solving the RP problem with constraints originating from the needs of individuals with disabilities; unlike previous models, it minimizes: (1) the collision risk with obstacles within a path by prioritizing the safer paths; (2) the walking time; (3) the number of turns by constructing smooth paths, and (4) the loss of cultural interest by penalizing multiple crossovers of the same paths, while satisfying user preferences, such as points of interest to visit and a desired tour duration. The proposed framework is applied for the development of a system module for safe navigation of visually impaired individuals (VIIs) in outdoor cultural spaces. The module is evaluated in a variety of navigation scenarios with different parameters. The results demonstrate the comparative advantage of our RP model over relevant state-of-the-art models, by generating safer and more convenient routes for the VIIs.

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Air traffic management and energy efficiency: the free flight concept

Cited by 8 publications

References 23 publications

Sustainability reporting, materiality, and accountability assessment in the airport industry

Sustainability reporting, materiality, and accountability assessment in the airport industry

Effectiveness of Conflict Resolution Methods in Air Traffic Management

A route planning framework for smart wearable assistive navigation systems

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