Results 31 to 40 of about 1,317,358 (306)
ASPECTS RELATED TO THE PROPULSION HYDRAFOIL SHIPS [PDF]
Fiabilitate şi Durabilitate, 2016 In this paper, we analyze some aspects related to the propulsion of hydrofoil ships. They are very important for the success of the mission if they are military ships and for cargo security, if they are civilian transport ships, especially when ...
Levent ALI +3 more
doaj
Hangkong gongcheng jinzhan, 2019 Flutter widely happens on solar-powered aircraft due to the slight stiffness and large deformation, so that it is significant to establish the dynamic model of solar-powered aircraft and analyze the flutter characteristics.Firstly, an initial dynamic ...
Mao Yiqing, Yang Fei, Gu Yingsong
doaj +1 more source
Of hummingbirds and helicopters: Hovering costs, competitive ability, and foraging strategies [PDF]
, 2004 Wing morphology and flight kinematics profoundly influence foraging costs and the overall behavioral ecology of hummingbirds. By analogy with helicopters, previous energetic studies have applied the momentum theory of aircraft propellers to estimate ...
Altshuler, Douglas L. +2 more
core +1 more source
Interference Analysis of Rotor and Wing of Compound Vertical Takeoff and Landing Fixed Wing UAV
Hangkong gongcheng jinzhan, 2019 The composite vertical take-off and landing fixed-wing UAV(Unmanned Airial Vehical) is a compound UAV with the performance of multi-rotor UAV and fixed-wing UAV, the aerodynamic interaction between rotor and wing of this kind of UAV is complex, and its ...
Zhang Fei, Wang Yun, Tan Kun
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Zoologia (Curitiba), 2014 Richardiidae is represented by ca. 180 species in 33 genera. A new species of Hemixantha, now totaling 20 species, is described from the Amazon Region, state of Pará, Brazil, and from Teoponte, Bolivia. Hemixantha maculosa sp. nov., H. picta Hennig, 1937
Lisiane Dilli Wentd, Rosaly Ale-Rocha
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Current Biology, 2004 SummaryA new book highlights the range of patterns evolved as a defence mechanism by butterflies that resemble aspects of other organisms. Nigel Williams reports.
openaire +3 more sources
Modelling and Simulation in High-Fidelity Crash Analysis of NGCTR-TD Composite Wing
AerospaceThis paper presents a methodology that involves the development of high-fidelity modeling and simulation procedures aimed at supporting virtual certification for crashworthiness requirements specific to tiltrotor aircraft, addressing the critical need ...
Luigi Di Palma +3 more
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FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
, 1981 An annular wing particularly suited for use in supporting in flight an aircraft characterized by the absence of directional stabilizing surfaces is described.
Walker, H. J.
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Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source