Results 11 to 20 of about 4,490,894 (295)

Towards robust aero-thermodynamic predictions for re-usable single-stage to orbit vehicles [PDF]

, 2012
Re-usable single stage to orbit launch vehicles promise to reduce the cost of access to space, but their success will be particularly reliant on accurate and robust modelling of their aero-thermodynamic characteristics.
Abdul Ahmad, Wuilbercq, Romain, Scanlon, Thomas, Romain Wuilbercq, Ahmad, Abdul Ossman, Thomas Scanlon, Richard Brown, Brown, Richard   +7 more
core   +4 more sources

Prediction of the aerodynamic performance of re-usable single stage to orbit vehicles [PDF]

, 2011
Re-usable single stage to orbit launch vehicles promise to reduce the cost of access to space, but their success will be particularly reliant on accurate modelling of their aero-thermodynamic characteristics.
Maddock, Christie, Scanlon, Thomas, Ahmad, Abdul Ossman, Brown, Richard   +3 more
core   +3 more sources

Measurement of Optical Rubidium Clock Frequency Spanning 65 Days

Sensors, 2022
Optical clocks are emerging as next-generation timekeeping devices with technological and scientific use cases. Simplified atomic sources such as vapor cells may offer a straightforward path to field use, but suffer from long-term frequency drifts and ...
Nathan D. Lemke, Kyle W. Martin, River Beard, Benjamin K. Stuhl, Andrew J. Metcalf, John D. Elgin   +5 more
doaj   +1 more source

The Sliding-Aperture Transform and Its Applicability to Deep-Level Transient Spectroscopy

Applied Sciences, 2022
A mathematical method is presented for the extraction of defect parameters from the multiexponential decays generated during deep-level transient spectroscopy experiments. Such transient phenomenon results from the ionization of charge trapped in defects
Walter R. Buchwald, Robert E. Peale, Perry C. Grant, Julie V. Logan, Preston T. Webster, Christian P. Morath   +5 more
doaj   +1 more source

Review of Radiation-Induced Effects in Polyimide

Applied Sciences, 2019
Polyimide (PI, Kapton-H®) films are widely utilized in the spacecraft industry for their insulating properties, mechanical durability, light weight, and chemical resistance to radiation.
Elena A. Plis, Daniel P. Engelhart, Russell Cooper, W. Robert Johnston, Dale Ferguson, Ryan Hoffmann   +5 more
doaj   +1 more source

HF-induced airglow at magnetic zenith: theoretical considerations [PDF]

Annales Geophysicae, 2005
Observations of airglow at 630nm (red line) and 557.7nm (green line) during HF modification experiments at the High Frequency Active Auroral Research Program (HAARP) heating facility are analyzed.
E. V. Mishin, W. J. Burke, T. Pedersen
doaj   +1 more source

Occurrence Characteristics of VHF Scintillation and Equatorial Spread F over Kwajalein during Moderate Solar Activity in 2012

Atmosphere, 2023
The occurrence probability of equatorial plasma bubbles and the associated spread F (ESF) irregularities have been derived from ground-based and space-borne measurements.
Chao-Song Huang
doaj   +1 more source

Metal Matrix Composite Solar Cell Metallization

E3S Web of Conferences, 2017
Advanced solar cells are moving to ever thinner formats in order to save mass and in some cases improve performance. As cells are thinned, the possibility that they may fracture or cleave due to mechanical stresses is increased. Fractures of the cell can
Wilt David M., Bradshaw Geoffrey, Gap Lt. Nathan, Abudayyeh Omar K., Nelson Cayla, Han Sang, Cox Nathanael, Rape Aaron, Landi Brian, Whipple Steve   +9 more
doaj   +1 more source

Distributions of Ion Density Irregularities and Their Gradients Inside Low‐Latitude Ionospheric Plasma Bubbles Based on C/NOFS Planar Langmuir Probe Data

Space Weather, 2021
Data from the planar Langmuir probe onboard the Communication/Navigation Outage Forecasting System has been processed, with focus on the: (1) identification of Equatorial Plasma Bubbles located within the eclipse sections of the satellite orbits; (2 ...
Emanoel Costa, Patrick A. Roddy, John O. Ballenthin   +2 more
doaj   +1 more source

Autonomous vehicles and urban space management

Scientific Journal of Silesian University of Technology. Series Transport, 2021
Discussions on how urban space would be transformed by the use of autonomous vehicles (AVs) are scarce. This study identifies the impacts caused by the shared use of AVs on urban parking and urban space management. An estimation method was formulated considering the reduction in parking demand, the possible alteration in vehicle ownership, and the ...
Dahlen SIQUEIRA SILVA, Csaba CSISZÁR, Dávid FÖLDES   +2 more
openaire   +2 more sources