Results 131 to 140 of about 8,757,591 (356)

Application of Remote Sensing to the Chesapeake Bay Region. Volume 1: Executive summary [PDF]

open access: yes
The proceedings are presented of a conference, jointly sponsored by the National Aeronautics and Space Administration, the U.S. Environmental Protection Agency, and the University of Maryland. The purpose of the Conference was to assemble representatives
Adler, I.   +6 more
core   +1 more source

Wide-range model predictive control for aero-engine transient state

open access: yesChinese Journal of Aeronautics, 2021
Ting Yu   +3 more
semanticscholar   +1 more source

THE NASA AIRBORNE TROPICAL TROPOPAUSE EXPERIMENT: High-Altitude Aircraft Measurements in the Tropical Western Pacific.

open access: yesBulletin of The American Meteorological Society - (BAMS), 2017
The February–March 2014 deployment of the National Aeronautics and Space Administration (NASA) Airborne Tropical Tropopause Experiment (ATTREX) provided unique in situ measurements in the western Pacific tropical tropopause layer (TTL).
E. Jensen   +34 more
semanticscholar   +1 more source

An Omnidirectional, High Power Density Magneto–Mechano–Electric Energy Harvester Using PNN–PZT Piezoceramic Operating in Decoupling Bending Mode

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Decoupling bending modes in magneto–mechano–electric energy harvesters, featuring two bending modes responding to different excitations with identical resonant frequencies, enables effective harvesting stray magnetic field energy in diverse environments.
Wei Peng   +7 more
wiley   +1 more source

Atmospheric Correction Thresholds for Ground-Based Radar Interferometry Deformation Monitoring Estimated Using Time Series Analyses

open access: yesRemote Sensing, 2020
Ground-based radar interferometry (GBSAR) is a useful method to control the stability of engineering objects and elements of geographical spaces at risk of deformation or displacement. To secure accurate and credible measurement results, it is crucial to
Tomasz Owerko   +2 more
doaj   +1 more source

Engine component instrumentation development facility at NASA Lewis Research Center [PDF]

open access: yes
The Engine Components Instrumentation Development Facility at NASA Lewis is a unique aeronautics facility dedicated to the development of innovative instrumentation for turbine engine component testing.
Bruckner, Robert J.   +2 more
core   +1 more source

Orbital dynamics of earth-orbiting 'smart dust' spacecraft under the effects of solar radiation pressure and aerodynamic drag [PDF]

open access: yes, 2010
This paper investigates how the perturbations due to asymmetric solar radiation pressure, in presence of Earth's shadow, and atmospheric drag can be balanced to obtain long-lived Earth centered orbits for swarms of SpaceChips, without the use of active ...
Colombo, C., McInnes, C.R.
core   +1 more source

Joint Situational Assessment‐Hierarchical Decision‐Making Framework for Maneuver Intent Decisions

open access: yesAdvanced Intelligent Systems, EarlyView.
This study introduces a new framework for decision‐making in unmanned combat aerial vehicles (UCAVs), integrating graph convolutional networks and hierarchical reinforcement learning (HRL). The method tackles adopts a curriculum‐based training approach guided by cross‐entropy rewards.
Ruihai Chen   +4 more
wiley   +1 more source

Pressure distribution on wing ribs of the VE-7 and TS airplanes in flight [PDF]

open access: yes
This paper is the first of a series of notes, each of which presents the complete results of pressure distribution tests made by the National Advisory Committee for Aeronautics, on single-wing ribs of the VE-7 and TS airplanes for a particular condition ...
Rhode, R V
core   +1 more source

Low-energy particle radiation environment at synchronous altitude [PDF]

open access: yes, 1972
The degradation of thermal control coatings of satellites due to the effects of low energy charged particles in the space environment is discussed. Data obtained from ATS-5 satellite measurement of proton and electron fluxes are presented. The variations
Lens, S. K., Shelley, E. G.
core   +1 more source

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