Results 41 to 50 of about 4,521 (204)

Optimizing equity and efficiency in the aerial firefighting resource allocation problem

International Transactions in Operational Research, EarlyView.
Abstract This study addresses the aerial firefighting resource allocation problem, formulated as the strategic prepositioning of a heterogeneous aerial firefighting fleet across capacity‐constrained airbases. A novel bi‐objective model is proposed that simultaneously optimizes efficiency (aggregate risk‐weighted accessibility) and equity (minimized ...
Konstantinos A. Tasias, George Nenes
wiley   +1 more source

Status of airworthiness requirements, risks and challenges for obtaining TC of person-carrying eVTOL aircraft

Hangkong gongcheng jinzhan
Obtaining a type certificate(TC) is a necessary prerequisite for the commercial operation of person-carrying electric vertical take-off and landing(eVTOL) aircraft, it is necessary to conduct the relevant airworthiness research for TC certification ...
ZHANG Miaochan, LI Lei, SUN Zhonglei, LIANG Wei   +3 more
doaj   +1 more source

Law and Infrastructure: Reliability, Automation Transition, and Irregularities of “U‐Space”

Regulation &Governance, EarlyView.
ABSTRACT The European Union (EU) is making regulatory efforts to allow for the safe integration of drones into civilian airspace through automated means. Commission Implementing Regulation (EU) 2021/664 concerning unmanned traffic management (a system referred to as “U‐Space”) furthers that commitment. Accordingly, drone operators must avail themselves
Samar Abbas Nawaz
wiley   +1 more source

Airborne Software Quality Assurance and Management Based on DO-178C

Hangkong gongcheng jinzhan, 2021
DO-178C as an acceptable compliance standard for airborne software airworthiness,it is clearly required that the software quality assurance(SQA)process must be included in the airborne software integration process.Based on the software life cycle ...
ZHOU Pei
doaj   +1 more source

Evaluation of Graphene Oxide–Modified Repair Methodologies in Carbon Fiber Reinforced Polymer Composites for Aerospace Applications

Polymer Composites, Volume 47, Issue 17, Page 15902-15915, 10 September 2026.
Schema 1. Schematic representation of the graphene oxide (GO)‐modified wet lay‐up repair strategy for CFRP laminates, illustrating stepwise ply removal, incorporation of GO into the epoxy repair matrix, and the enhanced mechanical performance of the repaired laminate.
Togay Yildirim, Tugba Soganci Aras
wiley   +1 more source

Concurrent Multi‐Scale Simulation of Progressive Damage in Laminated Composites Using Shell Finite Elements

International Journal for Numerical Methods in Engineering, Volume 127, Issue 16, 30 August 2026.
ABSTRACT This paper presents a study on multi‐scale modelling of progressive damage model in laminated composites using shell finite elements, with considerations for the effects of manufacturing defects. The approach utilises second‐order homogenisation with 5‐parameter shell formulation to capture the effects of complex sub‐structural geometry and ...
Aewis K. W. Hii, Stephen R. Hallett, Bassam El Said   +2 more
wiley   +1 more source

Hybrid‐Electric Aeroengines: Strategic Technical Pathways and Environmental Implications

Advanced Energy and Sustainability Research, Volume 7, Issue 8, August 2026.
Hybrid‐electric propulsion systems represent a transformative frontier in aerospace engineering, critical for achieving sustainable aviation. This review synthesizes recent breakthroughs in hybrid‐energy aero‐engine design, critically evaluating key technological pillars.
Yankun Wang, Mingkui Wang
wiley   +1 more source

Integration of UAS in the civil airworthiness regulatory system: present and future [PDF]

, 2010
The last years are witnessing a number of initiatives worldwide devoted to assess the safety levels of the unmanned aircraft. These initiatives are very heterogeneous; some of them are centred in airworthiness aspects while others focus on operations ...
Garcia Julia, Eduardo, Cuerno Rejado, Cristina, Martinez-Val Peñalosa, Rodrigo   +2 more
core  

Is That a Threat? How Types of Stakeholder and Reputational Threat Matter for Gaining Influence in Regulatory Rulemaking

Regulation &Governance, Volume 20, Issue 3, Page 1119-1135, July 2026.
ABSTRACT This paper assesses what type of comments are most useful to what type of stakeholder in gaining influence during public consultations. Theoretically, the paper approaches stakeholders' consultation comments as reputational threats from key audiences that the agency needs to respond to.
Rik Joosen
wiley   +1 more source

Analysis and research on airworthiness certification technology for helicopter aeromedical rescue system

Hangkong gongcheng jinzhan
The aeromedical rescue system is the necessary equipment for helicopter medical rescue, and retrofitting the medical rescue system will directly affect the safe operation of the aircraft, requiring strict airworthiness certification procedures ...
SHI Kaiwen, LI Xiaoxue
doaj   +1 more source