Results 131 to 140 of about 1,204,060 (386)
Control of Complex Maneuvers for a Quadrotor UAV using Geometric Methods on SE(3) [PDF]
arXiv, 2010 This paper provides new results for control of complex flight maneuvers for a quadrotor unmanned aerial vehicle (UAV). The flight maneuvers are defined by a concatenation of flight modes or primitives, each of which is achieved by a nonlinear controller that solves an output tracking problem.
arxiv
Advanced Functional Materials, EarlyView.Internally catalyzed siloxane dynamic chemistry is demonstrated resulting from amides covalently linked through alkyl chains to siloxanes. The alkyl length in the siloxane‐containing monomer tunes the network cross‐link density. Siloxane exchange dynamics are faster with increasing cross‐link density, because associative exchange is second order in ...
Nathan S. Purwanto +5 more
wiley +1 more source
RouthSearch: Inferring PID Parameter Specification for Flight Control Program by Coordinate Search [PDF]
Flight control programs use PID control modules with user-configurable Proportional (P), Integral (I), and Derivative (D) parameters to manage UAV flying behaviors. Users can adjust these PID parameters during flight. However, flight control programs lack sufficient safety checks on user-provided PID parameters, leading to a severe UAV vulnerability ...
arxiv +1 more source
JAMES FORREST LECTURE 1962. SPACE FLIGHT AND ROCKETS. [PDF]
, 1962 G. K. C. Pardoe, James S. Forrest
openalex +1 more source
Advanced Functional Materials, EarlyView.The self‐transformed Schottky heterojunction on MXene is developed to facilitate the dissociation of Li (solvent)x+ to achieve fast Li+ desolvation to promote rapid sulfur conversion kinetics by decreasing the related barriers, contributing to high‐performance Li─S batteries under low‐temperatures.
Yongzheng Zhang +12 more
wiley +1 more source
Scientific DataPhytoplankton respond to physical and hydrographic forcing on time and space scales up to and including those relevant to climate change. Quantifying changes in phytoplankton communities over these scales is essential for predicting ocean food resources,
Michael W. Lomas +6 more
doaj +1 more source
Aerospace Acupuncture and Space Flight: A Realm Not Too Distant! [PDF]
Med Acupunct, 2023 Niemtzow RC.
europepmc +1 more source
Manned space flight in transition [PDF]
A study was conducted to analyze the reorientation of NASA programs in the post-Apollo period. The study is an external view of NASA by unbiased observers as an input to and aid in the decision making process concerning near and long term planning.
Drucker, E. E. +3 more
core +1 more source
3D Concrete Printing of Triply Periodic Minimum Surfaces for Enhanced Carbon Capture and Storage
Advanced Functional Materials, EarlyView.A 3D‐printable and carbon‐capturing concrete is developed by replacing cement with diatomaceous earth (DE), which enhances rheology, provides hierarchical porosity, and serves as a nucleation site for carbonation. Maximum absorption of 488.7 gCO2 kgcement−1 is achieved in 7 days, a 142% increase over conventional concrete, and the triply periodic ...
Kun‐Hao Yu +9 more
wiley +1 more source