Results 111 to 120 of about 212,914 (312)
Multi‐Functional ZnO–Te Heterojunction Devices Enabling Compact Frequency Quadrupler
Advanced Functional Materials, EarlyView.Wafer‐scale ZnO–Te heterojunction devices featuring tunable double negative differential transconductance (D‐NDT) are demonstrated at ≤ 200°C. Leveraging this unique characteristic, a single‐stage frequency quadrupler is realized, achieving a 64%–75% reduction in device count.
Jae Hyeon Jun +8 more
wiley +1 more source
A preliminary comparison between the SR-3 propeller noise in flight and in a wind tunnel [PDF]
The noise generated by supersonic-tip-speed propellers is addressed. Models of such propellers were tested for acoustics in the Lewis 8-by-6-foot wind tunnel.
Dittmar, J. H., Lasagna, P. L.
core +1 more source
Advanced Healthcare Materials, EarlyView.This study presents a highly sensitive, oxidation‐resistant, biocompatible, and degradable Janus piezoresistive electronic skin for sustainable wearable electronics. The electronic skin exhibits sensitive and stable response across a broad pressure range, exceptional oxidation resistance, and Janus wettability.
Joon Kim +5 more
wiley +1 more source
Surface flow visualization of separated flows on the forebody of an F-18 aircraft and wind-tunnel model [PDF]
A method of in-flight surface flow visualization similar to wind-tunnel-model oil flows is described for cases where photo-chase planes or onboard photography are not practical.
Banks, Daniel W. +2 more
core +1 more source
Leeward centerline and side fuselage entry heating predictions for the space shuttle orbiter [PDF]
, 1983 Heat transfer data measured along the leeward centerline and on the side fuselage of the Space Shuttle orbiter during STS-2 and STS-3 are compared with predictions of empirical heating techniques derived from wind tunnel tests.
Helms, V. T., III
core +1 more source
Advanced Healthcare Materials, EarlyView.This work introduces photo‐crosslinkable tyraminated poly(vinyl alcohol)‐gelatin (PVA‐GT) hydrogels as tunable injectable platforms for tissue engineering and growth factor delivery applications. This schematic illustrates the two developed hydrogel formulations and the experimental workflow used to evaluate their physico‐chemical properties in vitro ...
Alessia Longoni +15 more
wiley +1 more source
Cryogenic wind tunnels: Unique capabilities for the aerodynamicist [PDF]
The cryogenic wind-tunnel concept as a practical means for improving ground simulation of transonic flight conditions. The Langley 1/3-meter transonic cryogenic tunnel is operational, and the design of a cryogenic National Transonic Facility is ...
Hall, R. M.
core +1 more source
Wind tunnel supplementary Mach number minimum section insert [PDF]
, 1981 A device is described which changes the Mach number capability of a wind tunnel without permanently altering the existing nozzle of the tunnel. An insert is removably attached to the wall of the existing nozzle expansion area thereby creating a second ...
Couch, L. M.
core +1 more source
Advanced Materials, Volume 37, Issue 13, April 2, 2025.Leveraging the numerous advantages of ammonium‐ion (NH₄⁺)—including cost‐effectiveness, low corrosiveness, preferential orientation, and rapid diffusion kinetics—aqueous NH₄⁺ batteries (AAIBs) have gained significant attention. This review highlights and evaluates the progress of AAIBs utilizing organic electrode materials such as small molecules ...
Mangmang Shi, Xiaoyan Zhang
wiley +1 more source
Design and performance of a fixed, nonaccelerating, guide vane cascade that operates over an inlet flow angle range of 60 deg [PDF]
A unique set of wind tunnel guide vanes are designed with an inverse design code and analyzed with a panel method and an integral boundary layer code developed at the NASA Lewis Research Center.
Cavicchi, R. H. +4 more
core +1 more source