Development of drive mechanism for an oscillating airfoil [PDF]
The design and development of an in-draft wind tunnel test section which will be used to study the dynamic stall of airfoils oscillating in pitch is described.
Sticht, Clifford D.
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Killer Whales in the Central Tropical Pacific: Occurrence, Resightings, Morphology, and Acoustics
Marine Mammal Science, Volume 42, Issue 3, July 2026.ABSTRACT Compared to their well‐studied coastal temperate counterparts, killer whales (Orcinus orca) in tropical‐subtropical and oceanic areas are under‐documented. We used sighting, photo‐identification, and acoustic data of killer whales in the central tropical Pacific (CTP), collected from multiple platforms between 2002 and 2023, to assess their ...
Marie C. Hill +4 more
wiley +1 more source
Experimental testing of prototype face gears for helicopter transmissions [PDF]
An experimental program to test the feasibility of using face gears in a high-speed and high-power environment was conducted. Four face gear sets were tested, two sets at a time, in a closed-loop test stand at pinion rotational speeds to 19,100 rpm and ...
Bossler, R., Handschuh, R., Lewicki, D.
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In-flight friction and wear mechanism [PDF]
, 1975 A unique mechanism developed for conducting friction and wear experiments in orbit is described. The device is capable of testing twelve material samples simultaneously. Parameters considered critical include: power, weight, volume, mounting, cleanliness,
Devine, E. J., Evans, H. E.
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The spread of non‐native species
Biological Reviews, Volume 101, Issue 3, Page 1197-1234, June 2026.ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock +16 more
wiley +1 more source
Wind tunnel tests of a blade subjected to midchord torsional oscillation at high subsonic stall flutter conditions [PDF]
A mechanical drive system for oscillating blades in a wind tunnel at frequencies up to 767 hertz and amplitudes of + or - 1.2 deg is described. High-speed motion pictures of schlieren images of the flow over a double-circular arc blade oscillating in ...
Boldman, D. R., Buggele, A. E.
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Multiple configuration shell-core structured robotic manipulator with interchangeable mechatronic joints : a thesis presented in partial fulfilment of the requirements for the degree of Masters of Engineering in Mechatronics at Massey University, Turitea Campus, Palmerston North, New Zealand [PDF]
, 2017 With the increase of robotic technology utilised throughout industry, the need for skilled labour in this area has increased also. As a result, education dealing with robotics has grown at both the high-school and tertiary educational level.
Janse van Vuuren, Jacques J P
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Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3116-3130, June 2026.ABSTRACT Purpose Echo‐Planar Imaging (EPI) is central to fMRI, diffusion MRI, and many dynamic clinical applications, yet rapid gradient switching induces strong mechanical vibrations, generates acoustic noise, and contributes to ghosting artifacts—effects that intensify at ultra‐high fields.
Amir Seginer +6 more
wiley +1 more source
A Quiet Helicopter for Air Taxi Operations [PDF]
NASA is exploring rotorcraft designs for VTOL air taxi operations, also known as urban air mobility (UAM) or on-demand mobility (ODM) applications. Several concept vehicles have been developed, intended to focus and guide NASA research activities in ...
Johnson, Wayne
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Integration of renewable energy sources in the distribution network [PDF]
, 2018 Tato práce uvádí obecné informace o obnovitelných zdrojích energie, typech elektráren a jejich pracovních principech. Práce je zaměřena na větrné elektrárny (principy, typy, komponenty, výhody a nevýhody).
Essa Abdullah
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