Results 111 to 120 of about 3,413,392 (339)

Analysis of a VTOL hover task with predictor displays using an optimal control model of the human operator [PDF]

, 1978
The influence of different types of predictor displays in a longitudinal VTOL hover task is analyzed in a theoretical study. It was assumed that pitch angle and position are presented to the pilot in separate displays namely the artificial horizon and ...
Govindaraj, T., Johannsen, G.
core   +1 more source

Ultrafine aerosol particles in aircraft plumes: In situ observations

Geophysical Research Letters, 1998
Measurements of ultrafine particles in the near field of the DLR research aircraft ATTAS using low (0.02 g/kg fuel) and high (2.7g/kg) fuel sulfur contents (FSCs) are presented. Soot emissions of ∼ 1015/kg show no significant dependence on FSC. Strong evidence is found that ∼ 1/3 of the soot particles must be involved in ice nucleation in contrails, in
Schröder, F.P., Kärcher, B., Petzold, A., Baumann, R., Busen, R., Hoell, C., Schumann, U.   +6 more
openaire   +2 more sources

Deep Reinforcement Learning Approaches for Sensor Data Collection by a Swarm of UAVs

Advanced Intelligent Systems, EarlyView.
This article presents four decentralized reinforcement learning algorithms for autonomous data harvesting and investigates how collaboration improves collection efficiency. It also presents strategies to minimize training times by improving model flexibility, enabling algorithms to operate with varying number of agents and sensors.
Thiago de Souza Lamenza, Bruno José Olivieri de Souza, Markus Endler   +2 more
wiley   +1 more source

Assessing the Impact of Surface and Upper-Air Observations on the Forecast Skill of the ACCESS Numerical Weather Prediction Model over Australia

Atmosphere, 2018
The impact of the Australian Bureau of Meteorology’s in situ observations (land and sea surface observations, upper air observations by radiosondes, pilot balloons, wind profilers, and aircraft observations) on the short-term forecast skill provided by ...
Sergei Soldatenko, Chris Tingwell, Peter Steinle, Boris A. Kelly-Gerreyn   +3 more
doaj   +1 more source

Observations of Aircraft Dissipation Trails from GOES

Monthly Weather Review, 2002
Two cases of distrails (aircraft dissipation trails) with associated fall streak clouds were analyzed using multispectral geostationary satellite data. One distrail was observed on 23 July 2000 in a single cloud layer over southeastern Virginia and the Chesapeake Bay. Another set of trails developed on 6 January 2000 at the top of multilayer clouds off
David P. Duda, Patrick Minnis
openaire   +1 more source

Controlling Dynamical Systems Into Unseen Target States Using Machine Learning

Advanced Intelligent Systems, EarlyView.
Parameter‐aware next‐generation reservoir computing enables efficient, data‐driven control of dynamical systems across unseen target states and nonstationary transitions. The approach suppresses transient behavior while navigating system collapse scenarios with minimal training data—over an order of magnitude less than traditional methods.
Daniel Köglmayr, Alexander Haluszczynski, Christoph Räth   +2 more
wiley   +1 more source

Serum PFAS in Aircraft Rescue and Firefighting (ARFF) Firefighters From Six U.S. Airport Fire Departments

American Journal of Industrial Medicine, EarlyView.
ABSTRACT Introduction Use of aqueous film‐forming foam (AFFF) is a source of exposure to per‐ and polyfluoroalkyl substances (PFAS) for firefighters working in aircraft rescue and firefighting (ARFF) settings. However, data characterizing the association between serum PFAS concentrations and exposure risk factors for ARFF firefighters are limited ...
Miriam M. Calkins, Yiwen Liu, Gavin Horn, Antonia M. Calafat, Judith M. Graber, Shawn C. Beitel, Alberto J. Caban‐Martinez, Julianne Cook Botelho, Randy Krause, Rob Mathis, Jeff Hughes, Casey Grant, Jaclyn M. Goodrich, Amy Nematollahi, Alesia M. Jung, Alissa D. Coleman, Sally Littau, Brooke A. Hawkes, Alexander C. Mayer, Jefferey L. Burgess   +19 more
wiley   +1 more source

Ice-supersaturated air masses in the northern mid-latitudes from regular in situ observations by passenger aircraft: vertical distribution, seasonality and tropospheric fingerprint

Atmospheric Chemistry and Physics, 2019
. The vertical distribution and seasonal variation of water vapour volume mixing ratio (H2O VMR), of relative humidity with respect to ice (RHice) and particularly of regions with ice-supersaturated air masses (ISSRs) in the extratropical upper ...
A. Petzold, P. Neis, Mihal Rütimann, S. Rohs, F. Berkes, H. Smit, M. Krämer, N. Spelten, P. Spichtinger, P. Nédélec, A. Wahner   +10 more
semanticscholar   +1 more source

Functional models from limited data: A parametric and multimodal approach to anatomy and 3D kinematics of feeding in basking sharks (Cetorhinus maximus)

The Anatomical Record, EarlyView.
Abstract Basking sharks, Cetorhinus maximus (Gunnerus, Brugden [Squalus maximus], Det Kongelige Norske Videnskabers Selskabs Skrifter, 1765, vol. 3, pp. 33–49), feed by gaping their mouths and gill slits, greatly reorienting their cranial skeletons to filter food from water.
Tairan Li, Mike Schindler, Martha Paskin, Venkata A. Surapaneni, Elliott Scott, Sabine Hauert, Nicholas Payne, David E. Cade, Jeremy A. Goldbogen, Frederik H. Mollen, Daniel Baum, Sean Hanna, Mason N. Dean   +12 more
wiley   +1 more source

Integrated aircraft and research vessel observational studies of aerosols and clouds in summer over the western North Pacific

Progress in Earth and Planetary Science
An integrated observational study of aerosols and clouds was carried out in summer 2022 over the western North Pacific (off the eastern coast of Hokkaido, Japan) using both an aircraft and a research vessel for the first time in this area.
Makoto Koike, Yoshimi Kawai, Kouji Adachi, Hidenori Aiki, Yugo Kanaya, Hideaki Kawai, Kazuyuki Kita, Fumiyoshi Kondo, Tsuyoshi Koshiro, Hitoshi Matsui, Takuma Miyakawa, Ayumu Miyamoto, Takafumi Miyasaka, Yuzo Miyazaki, Michihiro Mochida, Tatsuhiro Mori, Nobuhiro Moteki, Toshiyuki Murayama, Hisashi Nakamura, Sho Ohata, Eitarou Oka, Satoru Okajima, Yutaka Tobo, Shion Sekizawa, Atsushi Yoshida   +24 more
doaj   +1 more source