Results 11 to 20 of about 78,885 (346)
Indian Journal of Plastic Surgery, 2022 AbstractA propeller flap is an islanded flap that reaches the recipient site through an axial rotation around its vascular axis. The degree of rotation varies from 90 degrees to 180 degrees. It is a highly reliable local reconstructive option. These flaps are simple, single-stage, easy to harvest, and not constrained by routine length-to-width ratios ...
Nikhil Panse, Ankur Karanjkar
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Rubber Chemistry and Technology, 2019 ABSTRACT Solid propellants are energetic materials used to launch and propel rockets and missiles. Although their history dates to the use of black powder more than two millennia ago, greater performance demands and the need for “insensitive munitions” that are resistant to accidental ignition have driven much research and development over the ...
Mason, B.P., Roland, C.M.
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THE PROPELLER AND THE FROG [PDF]
The Astrophysical Journal, 2010 "Propellers" in planetary rings are disturbances in ring material excited by moonlets that open only partial gaps. We describe a new type of co-orbital resonance that can explain the observed non-Keplerian motions of propellers. The resonance is between the moonlet underlying the propeller, and co-orbiting ring particles downstream of the moonlet where
Eugene Chiang, Margaret Pan
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Infigratinib in children with achondroplasia: the PROPEL and PROPEL 2 studies
Therapeutic Advances in Musculoskeletal Disease, 2022 Background: Achondroplasia is the most common short-limbed skeletal dysplasia resulting from gain-of-function pathogenic variants in fibroblast growth factor receptor 3 ( FGFR3) gene, a negative regulator of endochondral bone formation. Most treatment options are symptomatic, targeting medical complications.
Savarirayan, Ravi +25 more
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Performances Study of a Hybrid Rocket Engine [PDF]
INCAS Bulletin, 2018 This paper presents a study which analyses the functioning and performances optimization of a hybrid rocket engine based on gaseous oxygen and polybutadiene polymer (HTPB).
Adrian-Nicolae BUTURACHE
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Introduction to “Propeller Flaps” [PDF]
Seminars in Plastic Surgery, 2020 AbstractThe editors of this issue of Seminars in Plastic Surgery dedicated to propeller flaps met in 2009 at the “1st Tokyo Meeting on Perforator and Propeller Flaps.” On that occasion, as part of the advisory panel of the meeting, they contributed to the definition and classification of these flaps.
Pignatti, M, Hallock, GG
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CFD Analysis of De Laval Nozzle of a Hybrid Rocket Engine [PDF]
E3S Web of Conferences: The study gives a general overview of the CFD-simulated gas flow via the nozzle of a De Laval rocket engine. In CFD software, the mesh is generated using the nozzle’s geometry.
Ahmad Mohamed Tarmizi +6 more
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Investigation of Effect of Rheological Behavior of Gelled Propellant on Atomization Characteristics of Swirl Injector [PDF]
فناوری در مهندسی هوافضا, 2021 The Gelled propellants have a promising future for aerospace applications because of possessing the advantages of both solid and liquid propellants. A gel propellant is a liquid propellant whose rheological properties have changed by the addition of ...
Ali Saberi moghaddam +2 more
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Rocket Solid Propellant Alternative Based on Ammonium Dinitramide [PDF]
INCAS Bulletin, 2017 Due to the continuous run for a green environment the current article proposes a new type of solid propellant based on the fairly new synthesized oxidizer, ammonium dinitramide (ADN).
Grigore CICAN, Alexandru-Daniel MITRACHE
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Thermochemistry of Combustion in Polyvinyl Alcohol + Hydroxylammonium Nitrate
Aerospace, 2021 A mixture of polyvinyl alcohol (PVA) and hydroxylammoniun nitrate (HAN) forms a gummy solid known as a plastisol, which is ionically conducting. When an electrostatic potential of 200 V DC is applied across the plastisol, it ignites.
James K. Baird, Robert A. Frederick
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