Results 41 to 50 of about 107,600 (223)
An Application of Point Pattern Matching in Astronautics
Journal of symbolic computation, 1994 We consider a point pattern matching problem occuring in astronautics: Given are pictures from a camera of unknown orientation, showing a section of the starry sky.
Gerald Weber, Lars Knipping, H. Alt
semanticscholar +1 more source
Adaptive and Online Health Monitoring System for Autonomous Aircraft [PDF]
, 2012 Good situation awareness is one of the key attributes required to maintain safe flight, especially for an Unmanned Aerial System (UAS). Good situation awareness can be achieved by incorporating an Adaptive Health Monitoring System (AHMS) to the aircraft.
Howe, Joe M. +3 more
core +1 more source
Investigation of the aerodynamic characteristics of a lifting body in ground proximity [PDF]
, 2016 The use of cambered hull shapes in the next generation of lighter-than-air vehicles to enhance aerodynamic performance, together with optimized take-off manoeuvre profiles, will require a more detailed understanding of ground proximity effects for such
Garry, Kevin P. +2 more
core +1 more source
In Situ Observation of Post‐CO Intermediates to Decode C─C Coupling Pathways in CO2 Electroreduction
Angewandte Chemie, EarlyView.Resonance Raman spectroscopy (RRS) was used to observe the in situ CO2 electroreduction process by designing copper electrodes with unique structures. This dynamic observation allowed for the capture of the C─C coupling process, where CH2 asymmetrically couples with CO to form CH2CO.
Mingxu Sun +9 more
wiley +2 more sources
Structurally Colored Physically Unclonable Functions with Ultra‐Rich and Stable Encoding Capacity
Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.This study reports a design strategy for generating bright‐field resolvable physically unclonable functions with extremely rich encoding capacity coupled with outstanding thermal and chemical stability. The optical response emerges from thickness‐dependent structural color formation in ZnO features, which are fabricated by physical vapor deposition ...
Abidin Esidir +8 more
wiley +1 more source
Langley 50th anniversary [PDF]
, 1967 Summary of Langley Research Center accomplishments in aeronautics and astronautics during past fifty ...
core +1 more source
Towards the noise reduction of piezoelectrical-driven synthetic jet actuators [PDF]
, 2014 This paper details an experimental investigation aimed at reducing the noise output of piezoelectrical-driven synthetic jet actuators without compromising peak jet velocity.
Anderson D. F. +18 more
core +1 more source
Ultra‐low LOD H2O2 Sensor Based on Synergistic Nernst Potential Effect
Advanced Science, EarlyView.Due to the synergistic effect of ENernst,H2O2${E}_{\mathrm{Nernst},\ {\mathrm{H}}_{2}{\mathrm{O}}_{2}}$ and ENernst,H+${E}_{\mathrm{Nernst},\ {\mathrm{H}}^{+}}$, the proposed sensors in this study can achieve ultralow H2O2 detection limit as low as 1.8 × 10−12 M based on the stacked PEDOT: BTB/PEDOT: PSS semiconducting layer.
Zhaoqun Wang +12 more
wiley +1 more source
Effect of Wedge-Shaped Deflectors on Flow Fields of Dual-Stream Jets [PDF]
, 2007 The effect of wedge-shaped fan flow deflectors on the mean and turbulent flow-fields of dual-stream jets is investigated. Several wedge-shaped deflector concepts were used to create asymmetry in the plume of a dual-stream jet issuing from a scaled down ...
Papamoschou, Dimitri +2 more
core +1 more source
Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function
Advanced Science, EarlyView.Due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since the meta‐hologram is difficult to be refreshed, zoom meta‐holography has not been reported to date. This study proposes a multi‐wavelength achromatic 3D meta‐holography with a zoom function, breaking through both the chromatic ...
Chao Liu +17 more
wiley +1 more source