Results 141 to 150 of about 9,883 (263)

Degradation Prediction of Proton‐Exchange Membrane Fuel Cell Tested Under Static and Quasi‐Dynamic Operating Conditions

Fuel Cells, Volume 26, Issue 3, June 2026.
ABSTRACT The viability and extended lifetime of proton‐exchange membrane (PEM) fuel cells are essential to enable hydrogen electric aviation. Their reliability, that is, the ability to maintain stable performance over long operational periods under varying environmental and load conditions, is a critical factor for their adoption in aviation systems ...
Matthew Georgio Dekkers, Marcia L. Baptista, Helmut Prendinger   +2 more
wiley   +1 more source

Research on a Drone‐Based Vacant Parking Detection System

IEEJ Transactions on Electrical and Electronic Engineering, Volume 21, Issue 6, Page 851-857, June 2026.
It can be difficult to know which spaces are available in parking lots and bicycle parking areas, so knowing the availability status is necessary for efficient parking. Therefore, in this study, we developed the drone that can display the availability status. Availability is determined by whether it can read a QR code attached to the ground. To conduct
Hiroki Mineshita, Syunsuke Wakamatsu, Hun‐ok Lim   +2 more
wiley   +1 more source

Scene Investigation from the Sky: Current and Future Uses of Unoccupied Aerial Systems in Forensic Investigations

WIREs Forensic Science, Volume 8, Issue 2, June 2026.
Police drone technology could be utilized to support forensic scene investigations. If the challenges of implementing new technologies can be overcome, drones could improve operational efficiency, interpretation issues and add investigative value in the courtroom. ABSTRACT Unoccupied aerial systems (UAS; otherwise known as Uncrewed Aerial Vehicles (UAV)
Clare Barrett, Sébastien Moret, Denis Werner   +2 more
wiley   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon, Samuel Birch, Audrey Chatain, Charles Cockell, Kendra K. Farnsworth, Peter M. Higgins, Stéphane Le Mouélic, Rosaly M. C. Lopes, Michael J. Malaska, Mohit Melwani Daswani, Kelly E. Miller, Catherine D. Neish, Olaf G. Podlaha, Jani Radebaugh, Lauren R. Schurmeier, Ashley Schoenfeld, Krista M. Soderlund, Anezina Solomonidou, Christophe Sotin, Nicholas A. Teanby, Tetsuya Tokano, Steven D. Vance   +21 more
wiley   +1 more source

Two Combustor Engine for Military Applications [PDF]

, 2009
The key requirements for military aircraft are high survivability and mission success rate: the former will “exponentially” increase the latter. The survivability of the aircraft depends crucially on its performance and energy signatures, to which its
Soon, Lee Aik
core  

PID‐Like Robust Control of Non‐Minimum Phase Robotic Manipulators

International Journal of Robust and Nonlinear Control, Volume 36, Issue 8, Page 4490-4503, 25 May 2026.
ABSTRACT This paper proposes an output‐feedback tracking controller for non‐minimum phase nonlinear systems with unknown uncertainties and external disturbances, where not all states are measurable, and the zero dynamics are unstable. The approach combines a backstepping‐based stabilizing state‐feedback law with a cascade extended high‐gain observer ...
Mohammad Al Saaideh, Almuatazbellah Boker, Mohammad Al Janaideh   +2 more
wiley   +1 more source

Application and Evaluation of a NOAA GFS‐Driven Air Quality Model Using CMAQv5.4 and High‐Resolution Emissions: FIREX‐AQ 2019

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract The National Air Quality Forecast Capability (NAQFC) provides numerical forecasting guidance of air quality up to 72 hr ahead over the United States. In this study, we evaluate the changes in its prediction skills by updating the Community Multiscale Air Quality (CMAQ) modeling system from version 5.3.1 to 5.4 and utilizing a high‐resolution 1‐
Kiarash Farzad, Yang Zhang, Daniel Tong, Siqi Ma, Youhua Tang, Jianping Huang, Patrick C. Campbell, Havala O. T. Pye, Benjamin Murphy, Fanglin Yang, Barry Baker, Daiwen Kang, Bill Hutzell, Golam Sarwar   +13 more
wiley   +1 more source

Polyvinylidene Fluoride: A Growing Specialty Polymer with Many Facets

Chinese Journal of Chemistry, Volume 44, Issue 10, Page 1697-1710, 15 May 2026.
Comprehensive Summary Polyvinylidene fluoride (PVDF), the second largest produced fluoropolymer, exhibits outstanding chemical, physical, electroactive and electrochemical properties and is involved in many High‐Tech applications. This review reports recent novelties in synthesis, characterization, processes and applications. Recent preparation studies
Bruno Améduri
wiley   +1 more source

The Propulsion Committee: final report and recommendations to the 25th ITTC

, 1970
Details the investigation and findings of the 25th ITTC Propulsion Committee over the period 2005-2008. Tasks were as follows:1. Update the state-of-the-art for propulsion systems emphasizing developments since the 2005 ITTC conference.2.
Kim, K., Minchev, A., Van, S.H., Semionicheva, E.Y., Becchi, P., Korkut, E., Turnock, S.R., Ando, J., Zhou, W.X.   +8 more
core  

Safety boundary protection control for distributed propulsion vehicle operating in plateau environment. [PDF]

Sci Rep
Dong Z, Da X, Zhang B, Guo L.
europepmc   +1 more source