Results 91 to 100 of about 9,883 (263)

Perfluorohexanone for Clean Fire Suppression: Mechanisms, System Design, Applications, and Future Directions

Safety Science and Technology, EarlyView.
Driven by halon and high GWP agent phase out, perfluorohexanone is increasingly deployed in enclosures such as data centers, marine machinery spaces, and industrial process lines. This review summarizes application performance, discharge and distribution design, material compatibility, and byproduct control and maps practical gaps for large volume and ...
Zhilei Yu, Haibin Dong, Yanfeng Sheng, Xuelei Xian, Dehua Zhang, Feiran Li, Liang Liu, Junchao Zhao, Heping Zhang   +8 more
wiley   +1 more source

Model‐Based Systems Engineering in Space Applications: A Comprehensive Literature Review

Systems Engineering, EarlyView.
ABSTRACT The growing complexity of space engineering is driving the demand to embrace the adoption of Model‐Based Systems Engineering (MBSE). Although the MBSE is well‐practiced in the space industry, the level of effort and need required to obtain the benefits of MBSE vastly differ across enterprises; this disparity presents a significant challenge to
Rehobot Bekele Buruso, Sara Himmiche, Taiwo Tejumola, Yeshirun Alemayehu, Bertrand Rose   +4 more
wiley   +1 more source

Investigation of porous surface on second mode in hypersonic boundary layer

AIP Advances
The second mode is the main instability factor in hypersonic flow and shows the characteristics of acoustic disturbance. The stabilization effect of a porous surface on the second mode in a hypersonic boundary layer is studied according to the acoustic ...
Jiaji Yang, Xinjie Qiu, Zhongyang Qi
doaj   +1 more source

Hydrogen Propulsion Technologies for Aviation: A Review of Fuel Cell and Direct Combustion Systems Towards Decarbonising Medium-Haul Aircraft

Hydrogen
Hydrogen propulsion technologies are emerging as a key enabler for decarbonizing the aviation sector, especially for regional commercial aircraft. The evolution of aircraft propulsion technologies in recent years raises the question of the feasibility of
Daisan Gopalasingam, Bassam Rakhshani, Cristina Rodriguez   +2 more
doaj   +1 more source

Hybrid electric propulsion systems for skydiving aircraft [PDF]

• Show viability of hybrid electric and all-electric aircraft concept for skydiving missions. • Push forward, investment in new electrical propulsion technology equipped light commuter category ...
Glassock, Richard, Galea, Michael, Glesk, Tibor, Williams, Warren   +3 more
core  

Extending SysML v2 for Safety ‐ Open‐Source Library for the System‐Theoretic Process Analysis

Systems Engineering, EarlyView.
ABSTRACT Safety challenges in automated transport systems create the need for a strong design and safety coupling. In this regard, the second version of the Systems Modeling Language (SysML v2) offers new integration opportunities with extensibility features such as libraries.
Alexander Ahlbrecht, Florian Wagner, Umut Durak   +2 more
wiley   +1 more source

Monitoring wildlife using long‐endurance solar‐electric UAVs

Wildlife Biology, EarlyView.
This report discusses the effectiveness of using small solar‐electric UAV (uncrewed aerial vehicles) for aerial wildlife monitoring. We review four years of aerial wildlife monitoring missions using a 5.5‐m wingspan, solar‐electric UAV that was equipped with a gimballed IR/RGB camera.
Götz Bramesfeld, William Bissonnette, Maya Rahaman‐Noronha, Kanwar Johal   +3 more
wiley   +1 more source

Potential of Hydrogen Fuel Cell Aircraft for Commercial Applications with Advanced Airframe and Propulsion Technologies

Aerospace
The present work demonstrates a comparative study of hydrogen fuel cells and combustion aircraft to investigate the potential of fuel cells as a visionary propulsion system for radically more sustainable medium- to long-range commercial aircraft.
Stanislav Karpuk, Yannik Freund, Richard Hanke-Rauschenbach   +2 more
doaj   +1 more source

A conceptual design methodology for low speed high altitude long endurance unmanned aerial vehicles [PDF]

, 2000
A conceptual design methodology was produced and subsequently coded into a Visual C++ (GUI) environment to facilitate the rapid comparison of several possible configurations to satisfy High Altitude Long Endurance (FIALE) unmanned aircraft (UAV ...
Altman, Aaron
core  

Intelligent Advisor System for Prescriptive Maintenance of Engineered Assets Using Failure Modes, Effects and Criticality Analysis, Knowledge Graph and Machine Learning

Artificial Intelligence for Engineering, EarlyView.
This paper presents an intelligent advisor for prescriptive maintenance that integrates FMECA, machine learning, and knowledge graphs to support fault diagnosis and root‐cause analysis. Validated on a linear actuator, the framework enhances diagnostic interpretability and traceability, linking sensor‐level anomalies to transparent knowledge‐driven ...
Hongyi Lin, Agusmian Partogi Ompusunggu
wiley   +1 more source