Results 71 to 80 of about 15,184 (243)

Techno-economic and environmental risk assessment of a turbo-electric distributed propulsion system on a blended wing body aircraft [PDF]

, 2014
Constant rise of air traffic has caused the environmental impacts of aviation to be the subject of an unprecedented scrutiny. Organisations all over the world are setting targets for emission reductions that represent the technological potential for ...
Giakoumakis, Eleftherios
core  

High‐Speed Altitude Regulation With Neuromorphic Camera and Lightweight Embedded Computation

Advanced Intelligent Systems, EarlyView.
Neuromorphic cameras deliver rapid, high‐dynamic‐range sensing but overwhelm embedded processors at high speeds. This work presents a lightweight, optimized Lucas–Kanade optical flow method with parallelization, gyroscopic derotation, and adaptive event slicing.
Simon L. Jeger, Alessandro Marchei, Charbel Toumieh, Dario Floreano   +3 more
wiley   +1 more source

Ultrasonic Rainbow: A Meta‐Transducer for Frequency‐Selective Elastic Wave Control via Dithering‐Based Wavenumber Tuning

Advanced Intelligent Systems, EarlyView.
A piezoelectric meta‐transducer generates an ultrasonic rainbow, steering guided elastic waves to different angles according to frequency. A dithering‐based binary electrode design enables a closer realization of the target wavenumber filter, improving directional purity and suppressing unwanted lobes. Numerical and experimental validation demonstrates
Masoud Mohammadgholiha, Jochen Moll, Kilian Tschöke, Carsten Kruska, Sylvia E. Gebhardt, Luca De Marchi   +5 more
wiley   +1 more source

Evaluating Aircraft with Electric and Hybrid Propulsion

, 2018
>>> Purpose – This presentation takes a critical look at various electric air mobility concepts. With a clear focus on requirements and first principles applied to the technologies in question, it tries to bring inflated expectations down to earth ...
Scholz, Dieter
core   +1 more source

A Methodology for Preliminary Performance Estimation of a Hybrid-Electric Tilt-Wing Aircraft for Emergency Medical Services [PDF]

, 2020
This paper aims to provide a simple methodology to preliminary size a hybrid-electric propulsion system for large scale piloted, optionally piloted or unmanned tilt-wing aircraft.
Guglieri, Giorgio, Capone, Pierluigi, Pierluigi Capone, Giorgio Guglieri, Federico Barra, Barra, Federico   +5 more
core   +1 more source

Circular Economy Pathways for Airport Climate Change Mitigation

Business Strategy and the Environment, EarlyView.
ABSTRACT Airport operators face growing climate‐change pressures; the circular economy offers pathways to reduce impacts and recover resources. We examine how airport operators apply the circular economy in practice. We use an exploratory qualitative multicase design based on practitioner‐generated documents (e.g., press releases and sustainability ...
Michele Oppioli, Davide Calandra, Federico Lanzalonga, Paolo Biancone   +3 more
wiley   +1 more source

System architectures for thermal management of hybrid-electric aircraft - FutPrInt50

IOP Conference Series: Materials Science and Engineering, 2022
Abstract Electric and Hybrid-Electric Aircraft (HEA) propulsion system designs shall bring challenges at aircraft and systems level, mainly in propulsion, electric and thermal management systems (TMS). The electrification of the propulsion system relies on large and high-power electrical equipment (e.g., electrical motors, converters ...
Affonso, Walter, Tavares, RenataT., Barbosa, Felipe R., Gandolfi, Ricardo, dos Reis, Ricardo J. N., da Silva, Carlos R. I., Kipouros, Timoleon, Laskaridis, Panagiotis, Enalou, Hossein Balaghi, Chekin, Andrei, Kukovinets, Aleksey, Gubernatorov, Konstantin, Ravikovich, Yury, Ivanov, Nikolay, Ponyaev, Leonid, Holobtsev, Dmitry   +15 more
openaire   +3 more sources

Active flow control systems architectures for civil transport aircraft

, 2010
Copyright @ 2010 American Institute of Aeronautics and AstronauticsThis paper considers the effect of choice of actuator technology and associated power systems architecture on the mass cost and power consumption of implementing active flow control ...
Crowther, W. J.; id_orcid, Liddle, S. C., W. J. Crowther, Jabbal, M, Liddle, SC, S. C. Liddle, Liddle, Stephen, Jabbal, M., Crowther, WJ, M. Jabbal   +9 more
core   +1 more source

From Material Tensions to Organizational Paradoxes: How Manufacturers Cope With the Limits of Circular Product Design

Business Strategy and the Environment, EarlyView.
ABSTRACT Circular product design (CPD) is central to advancing the circular economy by enabling the narrowing, slowing, and closing of resource flows. Yet, its implementation remains persistently challenging for firms. Prior research has largely framed these challenges as discrete barriers, overlooking the structural contradictions embedded in CPD ...
Vanessa Robertson, Nelly Rahimy, Suleika Bort   +2 more
wiley   +1 more source

Intrinsically Ultrahigh‐Rate Charging Capability of Conversion Reaction Cathodes and Its Origin: A Mechanism Study on FeS2

Carbon Energy, EarlyView.
Origin of the ultrahigh‐rate charge capability of FeS2: FeS2 demonstrates exceptional high‐rate charging capability, delivering 92% capacity retention at 10 C and maintaining as much as 60% capacity retention even at 30 C. This originates from an ultrahigh apparent diffusion coefficient involving both Li+ and Fe2+.
Zhen Yu, Junxiong Chen, Zongwang Tian, Ji Li, Yicheng Wang, Lifu Shen, Jianwei Meng, Kaiyu Zhang, Jingyi Xie, Nian Zhang, Xuefei Feng, Tsu‐Chien Weng, Xiaosong Liu, Pengfei Yu   +13 more
wiley   +1 more source