Results 41 to 50 of about 8,641,712 (236)

Resonances and Lander Modes Observed by InSight on Mars (1–9 Hz)

Bulletin of The Seismological Society of America (BSSA), 2021
The National Aeronautics and Space Administration’s (NASAs) Interior exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander successfully touched down on Mars in November 2018, and, for the first time, a seismometer was ...
N. Dahmen, G. Zenhäusern, J. Clinton, D. Giardini, S. Stähler, S. Ceylan, C. Charalambous, M. van Driel, K. Hurst, S. Kedar, P. Lognonné, N. Murdoch, R. Myhill, M. Panning, W. Pike, M. Schimmel, C. Schmelzbach, John‐Robert Scholz, A. Stott, É. Stutzmann, W. Banerdt   +20 more
semanticscholar   +1 more source

Evaluating the Rationale for Folding Wing Tips Comparing the Exergy and Breguet Approaches [PDF]

, 2017
The design and development processes for future aircraft aims to address the environmental and efficiency challenges needed to facilitate the engineering of concepts that are far more integrated and require a multidisciplinary approach.
Hayes, D., Lone, M. Mudassir, Whidborne, James F.   +2 more
core   +1 more source

Needs assessment of gossamer structures in communications platform end-of-life disposal [PDF]

, 2013
The use of a gossamer structure is considered in application to end-of-life disposal of communications platforms. A wide-ranging survey of end-of-life disposal techniques and strategies is presented for comparison against a gossamer structure prior to a ...
Bewick, Charlotte, Macdonald, Malcolm, McInnes, Colin   +2 more
core   +1 more source

Refined GEDI Level-2A Database Construction: Focused on Gyeonggi Province, Republic of Korea [PDF]

Geo Data
The Global Ecosystem Dynamics Investigation (GEDI), a full-waveform light detection and ranging system, translated the energy into a continuous waveform and recorded the signals chronologically for enabling geometric analysis of the vertical structure of
Kyeong-Hun Cho, Seung-Kuk Lee
doaj   +1 more source

Aeronautics composite material inspection with a terahertz time-domain spectroscopy system

, 2013
. The usability of pulsed broadband terahertz radiation for the inspection of composite materials from the aeronautics industry is investigated, with the goal of developing a mobile time-domain spectroscopy system that operates in reflection geometry.
F. Ospald, W. Zouaghi, R. Beigang, C. Matheis, J. Jonuscheit, B. Recur, Jean-Paul Guillet, P. Mounaix, W. Vleugels, P. Bosom, L. González, I. López, R. M. Edo, Y. Sternberg, M. Vandewal   +14 more
semanticscholar   +1 more source

Deflecting small asteroids using laser ablation : Deep space navigation and asteroid orbit control for LightTouch2 Mission [PDF]

, 2013
This paper presents a low-cost, low mass, mission design to successfully intercept and deflect a small and faint, 4 m in diameter asteroid. Intended to be launched after 2025, the laser-ablating mission, LightTouch2 will be used to deflect the orbit of ...
Branco, Joao, Garcia Yarnoz, Daniel, Sanchez Cuartielles, Joan-Pau, Vasile, Massimiliano, Vetrisano, Massimo   +4 more
core   +1 more source

Observational Needs for Improving Ocean and Coupled Reanalysis, S2S Prediction, and Decadal Prediction

Frontiers in Marine Science, 2019
Developments in observing system technologies and ocean data assimilation (DA) are symbiotic. New observation types lead to new DA methods and new DA methods, such as coupled DA, can change the value of existing observations or indicate where new ...
Stephen G. Penny, Santha Akella, Magdalena A. Balmaseda, Philip Browne, James A. Carton, Matthieu Chevallier, Francois Counillon, Catia Domingues, Sergey Frolov, Patrick Heimbach, Patrick Hogan, Ibrahim Hoteit, Doroteaciro Iovino, Patrick Laloyaux, Matthew J. Martin, Simona Masina, Andrew M. Moore, Patricia de Rosnay, Dinand Schepers, Bernadette M. Sloyan, Andrea Storto, Aneesh Subramanian, SungHyun Nam, Frederic Vitart, Chunxue Yang, Yosuke Fujii, Hao Zuo, Terry O’Kane, Paul Sandery, Thomas Moore, Christopher C. Chapman   +30 more
doaj   +1 more source

Medium-Scale UAVs: A Practical Control System Considering Aerodynamics Analysis

Drones, 2022
Unmanned aerial vehicles (UAVs) have drawn significant attention from researchers over the last decade due to their wide range of possible uses. Carrying massive payloads concurrent with light UAVs has broadened the aeronautics context, which is feasible
Mohammad Sadeq Ale Isaac, Marco Andrés Luna, Ahmed Refaat Ragab, Mohammad Mehdi Ale Eshagh Khoeini, Rupal Kalra, Pascual Campoy, Pablo Flores Peña, Martin Molina   +7 more
doaj   +1 more source

The CYGNSS Mission: On-Going Science Team Investigations

Remote Sensing, 2021
In 2012, the National Aeronautics and Space Administration (NASA) selected the CYclone Global Navigation Satellite System (CYGNSS) mission coordinated by the University of Michigan (UM) as a low-cost and high-science Earth Venture Mission.
H. Carreno-Luengo, J. Crespo, R. Akbar, A. Bringer, A. Warnock, M. Morris, C. Ruf   +6 more
semanticscholar   +1 more source

Active Flow Control at Low Reynolds Numbers by Periodic Airfoil Morphing [PDF]

, 2016
This paper investigates the application of a periodically deforming airfoil surface for the purpose of flow control at low Reynolds numbers. A physical model has been fabricated by bonding Macro Fiber Composite (MFC) actuators to the underside of a NACA ...
Debiasi, M, Jones, G, Papadakis, G, Santer, M   +3 more
core   +1 more source