Results 11 to 20 of about 10,556 (275)
Identification of roll damping coefficient using the free rotation method [PDF]
INCAS BulletinThe free rotation method represents the simplest method for roll damping coefficient identification in experimental aerodynamics. To apply this method, it is necessary to spin the model to a desired angular velocity and then release the model to spin ...
Ionut BUNESCU +3 more
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Experimental Validation of Elliptical Fin-Opening Behavior
Shock and Vibration, 2003 An effort to improve the performance of ordnance has led to the consideration of the use of folding elliptical fins for projectile stabilization. A second order differential equation was used to model elliptical fin deployment history and accounts for ...
James M. Garner +2 more
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Effect of lift force on the aerodynamics of dust grains in the protoplanetary disk [PDF]
, 2014 We newly introduce lift force into the aerodynamics of dust grains in the protoplanetary disk. Although many authors have so far investigated the effects of the drag force, gravitational force and electric force on the dust grains, the lift force has ...
Kimura, Shigeo S., Yamaguchi, Masaki S.
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Defence Technology, 2019 This paper introduces a novel approach for controlling the exterior ballistic properties of spin-stabilized bullets by optimizing their internal mass distributions.
Janne Lahti +3 more
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Vojnotehnički Glasnik, 2017 Aerospace as a whole, primarily aviation and planes, for a short time after 1903, greatly advance the frontiers of human activity. Initially, unsafe "flying device" the plane, has become a factor in loose resolving wars and one of the reliable means
Branko B. Bilbija
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Paradoxical popups: Why are they hard to catch?
, 2008 Even professional baseball players occasionally find it difficult to gracefully approach seemingly routine pop-ups. This paper describes a set of towering pop-ups with trajectories that exhibit cusps and loops near the apex.
A. Terry Bahill +7 more
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Biofluiddynamic scaling of flapping, spinning and translating fins and wings [PDF]
, 2009 Organisms that swim or fly with fins or wings physically interact with the surrounding water and air. The interactions are governed by the morphology and kinematics of the locomotory system that form boundary conditions to the Navier–Stokes (NS ...
Dickinson, Michael H., Lentink, David
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Learning Aircraft Spin Dynamics from Measurement Data Using Hankel DMDc with Error in Variables
AerospaceAircraft spin, a nonlinear phenomenon dominated by unsteady aerodynamics, is difficult to predict. This article proposes a novel approach using Hankel Dynamic Mode Decomposition with Control (HDMDc) to identify an aircraft plant model for spin motion ...
Balakumaran Swaminathan +1 more
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Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer
FEBS Letters, EarlyView.Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani +4 more
wiley +1 more source
Kesediaan pelajar dari aspek kemahiran teknikal terhadap pembentukan kebolehkerjaan di Kolej Vokasional Wilayah Selatan [PDF]
, 2015 Graduan yang menganggur terus menjadi masalah yang semakin meruncing di Malaysia. Terdapat majikan yang menganggap kompetensi akademik sahaja tidak mencukupi dan mula meminta institusi pendidikan tinggi untuk menghasilkan graduan yang dilengkapi ...
Hanafi., Suhaili
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