Results 181 to 190 of about 339,266 (327)

Large-scale V/STOL testing [PDF]

open access: yes
Several facets of large-scale testing of V/STOL aircraft configurations are discussed with particular emphasis on test experience in the Ames 40- by 80-Foot Wind Tunnel.
Aiken, T. N.   +3 more
core   +1 more source

State of the Art of Low‐Frequency Acoustic Modulation: Intensity Enhancement and Directional Control

open access: yesAdvanced Science, EarlyView.
High intensity low‐frequency sound sources hold significant value in many fields. However, their long wavelength, strong penetrability, and tendency to diffract make direction control and intensity enhancement challenging. Acoustic generators and metamaterial‐based acoustic devices still face issues such as low energy efficiency, poor directional ...
Jingsong Xu   +13 more
wiley   +1 more source

A rotorcraft flight database for validation of vision-based ranging algorithms [PDF]

open access: yes
A helicopter flight test experiment was conducted at the NASA Ames Research Center to obtain a database consisting of video imagery and accurate measurements of camera motion, camera calibration parameters, and true range information.
Smith, Phillip N.
core   +1 more source

Dual‐Working‐Pattern Nanosheet‐Based Hydrogel Sensors for Constructing Human‐Machine and Physiological‐Electric Interfaces

open access: yesAdvanced Science, EarlyView.
Hydrogels hold great potential as candidates for next‐generation epidermal electronics; however, an unresolved issue remains: the differentiation and selection of sensing modes in hydrogel sensors. This study integrates series‐parallel conductive nanosheet configurations into an ultra‐soft hydrogel, resulting in enhanced signal intensity and ...
Shitao Shi   +9 more
wiley   +1 more source

Wing force and surface pressure data from a hover test of a 0.658-scale V-22 rotor and wing [PDF]

open access: yes
A hover test of a 0.658-scale V-22 rotor and wing was conducted in the 40 x 80 foot wind tunnel at Ames Research Center. The principal objective of the test was to measure the surface pressures and total download on a large scale V-22 wing in hover.
Felker, Fort F.   +3 more
core   +1 more source

A Classroom Modification of the Ames Test

open access: yesThe American Biology Teacher, 1979
Victor Trzeciak, Joseph Yavornitzky
openaire   +2 more sources

RIG‐I‐Inducing Small Molecules Potently Inhibit HMA‐Resistant AML Through Igniting the Overloaded dsRNA Arsenal

open access: yesAdvanced Science, EarlyView.
This study reveals a novel mechanism of resistance to DNA hypomethylating agents (HMAs) in acute myeloid leukemia (AML), and identifies all‐trans retinoic acid (ATRA) and tamibarotene (TAM) as potent agents that overcome HMA resistance by reactivating the interferon anticancer immune response. The findings offer promising therapeutic strategies for HMA‐
Xueqin Chen   +18 more
wiley   +1 more source

Upgrading of NASA-Ames high-energy hypersonic facilities: A Study [PDF]

open access: yes
This study reviews facility capabilities of NASA, Ames Research Center to simulate hypersonic flight with particular emphasis on arc heaters. Scaling laws are developed and compared with ARCFLO II calculations and with existing data.
Carlson, William C. A.   +1 more
core   +1 more source

Coactosin‐Like Protein Reduces Prostaglandin D2 Production in Alveolar Macrophages and Alleviates Allergic Airway Inflammation

open access: yesAdvanced Science, EarlyView.
Coactosin‐like protein inhibits prostaglandin D₂ (PGD2) secretion by modulating alveolar macrophage polarization, thereby suppressing activation of the PGD2 receptor CRTH2 in Th2‐associated immune cells and alleviating allergic airway inflammation.
Li‐Long Pan   +12 more
wiley   +1 more source

Outer planets probe testing [PDF]

open access: yes
An atmospheric entry Probe is being developed by NASA Ames Research Center (ARC) to conduct in situ scientific investigations of the outer planets' atmospheres.
Edwards, T. M.   +2 more
core   +1 more source

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