Results 111 to 120 of about 587,209 (299)
Ground Effect for Lifting Rotors in Forward Flight [PDF]
A theoretical analysis indicates that, for rotors, ground effect decreases rapidly with increases in either height above the ground or forward speed. The decrease with height above the ground in forward flights is greater than that in hovering. The major
Heyson, Harry H.
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Temporal and Cell‐Specific Regulation of Synaptic Homeostasis by the Chromatin Remodeler Chd1
Advanced Science, EarlyView.Chd1, the Drosophila homologue of mammalian CHD2 ‐ a gene linked to autism, epilepsy, and intellectual disability, is required for synaptic homeostatic plasticity. Chd1 in glia is necessary for the rapid induction of synaptic homeostasis, whereas Chd1 in motoneurons, muscle, and glia is critical for long‐term maintenance.
Danielle T. Morency +19 more
wiley +1 more source
MAXIMAL FORCES FOR PEAK HEIGHT AND FLIGHT DISTANCE ON VAULT IN MENS ARTISTIC GYMNASTICS?
Science of Gymnastics JournalAnalysing the take-off forces on the vaulting table can help to inform the athlete about the vaulting technique. A measuring device was used to measure the forces during the Artistic World Championships 2019.
Thomas Lehmann +3 more
doaj +1 more source
Hovering impulsive noise: Some measured and calculated results [PDF]
In-plane impulsive noise radiating from a hovering model rotor was measured in an anechoic environment. The hover acoustic signature was compared with existing theoretical prediction models with previous forward flight experiments using the same model ...
Boxwell, D. A. +2 more
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The physiology and biomechanics of avian flight at high altitude [PDF]
, 2006 Many birds fly at high altitude, either during long-distance flights or by virtue of residence in high-elevation habitats. Among the many environmental features that vary systematically with altitude, five have significant consequences for avian flight ...
Altshuler, Douglas L., Dudley, Robert
core
The Uppsala APP Mutation Promotes Wild‐Type Amyloid‐β Aggregation and Deposition In Vivo
Advanced Science, EarlyView.We investigated in vivo cross‐seeding of amyloid‐β (Aβ) isoforms in transgenic mice co‐expressing wild‐typeAβ and the Uppsala‐mutant Aβ variant (AβUpp), lacking six central residues. Weleveraged MALDI‐MS imaging and hyperspectral microscopy to follow spatio‐temporalAβ deposition.
Junyue Ge +14 more
wiley +1 more source
Advanced Science, EarlyView.This study discovered a new pathway that tells fruit flies when to stop eating. It found that rising blood sugar (fructose) is detected by a sensor called GR43a. This triggers a chain reaction involving the satiety signal sulfakinin and its receptor, ultimately activating a final satiety signal, ILP5.
Hong‐Fei Li +7 more
wiley +1 more source
Optimization methods applied to the aerodynamic design of helicopter rotor blades [PDF]
Described is a formal optimization procedure for helicopter rotor blade design which minimizes hover horsepower while assuring satisfactory forward flight performance.
Bingham, Gene J. +2 more
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Mechanics of forward flight in insects
, 2015 This study examines the kinematics, aerodynamics, and energetics of forward flight in insects. Bumblebees and hoverflies in controlled free flight were filmed over a range of flight speeds with a high speed camera at 5000 frames a second. The wing motions in three dimensions were reconstructed using a projection analysis technique.
openaire +1 more source
Advanced Science, EarlyView.Soybean employs its circadian clock, governed by GmCCA1, to rhythmically defend against soybean cyst nematodes. The pathogen retaliates by secreting the effector Hg4E02, which hijacks the clock to suppress defense and co‐opt the host's translation machinery for nutrient acquisition.
Xingwei Wang +21 more
wiley +1 more source