Results 51 to 60 of about 617,338 (368)

Influence of a Hydrogen Addition to the Inert Gas and Subsequent Heat Treatments on the Microstructure and Mechanical Properties of Magnesium WE43 Fabricated by PBF‐LB/M

open access: yesAdvanced Engineering Materials, EarlyView.
This article investigates optimal processing conditions for the laser‐based powder bed fusion of WE43. To limit the interaction with remaining oxygen, a 3 vol% hydrogen admixture to the inert gas is investigated. Furthermore, heat treatments are investigated in the range of 250–350 °C for 48 h.
Arvid Abel   +9 more
wiley   +1 more source

Private Governance Responses to Climate Change: The Case of Global Civil Aviation [PDF]

open access: yes, 2018
This Article explores how private governance can reduce the climate effects of global civil aviation. The civil aviation sector is a major contributor to climate change, accounting for emissions comparable to a top ten emitting country.
Metzger, Daniel J.   +1 more
core   +2 more sources

The sky is the limit?: The determinants and constraints of European airports' commercial revenues [PDF]

open access: yes, 2010
This study investigates the determinants of commercial and retail airport revenues as well as revenues from real estate operations. Cross-sectional OLS, 2SLS and robust regression models of European airports identify a number of significant drivers of ...
Fuerst, Franz, Sven, Gross, Ulf, Klose
core   +1 more source

Development of Aluminum Scandium Alloys for Hydrogen Storage Valves

open access: yesAdvanced Engineering Materials, EarlyView.
Different aluminum alloy series and various aluminum‐scandium alloys with differing Sc and Zr levels are evaluated for use in hydrogen storage valve production. The alloys undergo hardness testing, optical microscopy, and tensile strength analysis, with hardening behavior studied under varying conditions.
Francisco García‐Moreno   +4 more
wiley   +1 more source

Implications of evolving civil aviation safety regulations on the safety outcomes of air transport industry and airports

open access: yesAviation, 2014
Historically, the aviation industry has been highly regulated under national and international regulations and various agreements due to instinctive safety risks associated with operations of an aircraft.
Devinder K. Yadav, Hamid Nikraz
doaj   +1 more source

Fleet-Level Environmental Assessments for Feasibility of Aviation Emission Reduction Goals [PDF]

open access: yesarXiv, 2022
The International Air Transport Association (IATA) is one of several organizations that have presented goals for future CO2 emissions from commercial aviation with the intent of alleviating the associated environmental impacts. These goals include attaining carbon-neutral growth in the year 2020 and total aviation CO2 emissions in 2050 equal to 50% of ...
arxiv  

CALPHAD‐Guided Prediction and Interpretation of Phase Formation in Ta–Mo–Cr–Ti–Al Refractory High‐Entropy Alloys

open access: yesAdvanced Engineering Materials, EarlyView.
This study designs Ta–Mo–Cr–Ti–Al refractory high‐entropy alloys with a disordered body‐centered‐cubic A2 crystal structure aiming for improved ductility, lower density, and oxidation resistance. Four alloy compositions are identified by thermodynamic calculations.
Kateryna Khanchych   +7 more
wiley   +1 more source

Modifications of a simple I-beam and its effects on the stress state

open access: yesAviation, 2016
The motivation for this work is a desire for a deeper understanding of the structural failures in a composite glider wing, which has been tested in the laboratories of the Institute of Aerospace Engineering, Faculty of Mechanical Engineering, Brno ...
Jakub Cejpek, Jaroslav Juračka
doaj   +1 more source

The ICAO Assembly Resolutions on international aviation and climate change: Historic agreement, breakthrough deal and the Cancun effect [PDF]

open access: yes, 2011
In what the International Civil Aviation Organization (ICAO) heralds as a 'historic agreement' and the European Union (EU) calls a 'breakthrough deal', the recent ICAO Assembly Resolutions A37-18 and 19 mark the end of the Assembly Resolution A36-22 ...
Truxal, S.
core  

Transforming Cellulose Into Functional Three‐Dimensional Structures

open access: yesAdvanced Functional Materials, EarlyView.
Cellulose is promising for replacing synthetic polymers due to its excellent mechanical properties and low cost. This review highlights the recent advancements in transforming cellulose into functional 3D structures, including liquid gels and porous materials.
Xia Sun   +5 more
wiley   +1 more source

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