Results 211 to 220 of about 249,201 (263)
The <i>Campylobacter jejuni</i> flagellar V-ring discerns viscosity levels to alter swimming velocity, metabolic gene expression, and fitness. [PDF]
Proc Natl Acad Sci U S ARibardo DA +3 more
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The dependence of penetration velocity on impact velocity
International Journal of Impact Engineering, 2006Abstract Recent experimental measurements show that eroding long-rod penetration velocity is a linear function of impact velocity over a very wide range of impact velocities and for an interesting range of rod–target material combinations. These experiments all show that U = a + bV , where U and V are the penetration and impact velocity ...
D.L. Orphal, C.E. Anderson
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Biomechanical analysis of a fall: Velocities at impact
2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2016There are numerous research works focusing on falls of the elderly, proposing various technologies for its detection; however, few research works attempted to describe the mechanical phenomenon itself. In this study, we analyzed the kine(ma)tics of human falls with a simplified biomechanical model of human segments.
Norbert Noury +3 more
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Low-velocity impacts of quasiperiodic oscillations
Chaos, Solitons & Fractals, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dankowicz, Harry +2 more
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High-Velocity Impact Comminution of Magnetite
Materials Science Forum, 2014Conventional comminution (crushing and grinding) uses compressive forces to initiate and propagate cracks throughout the rock mass, yet the material actually breaks under tension since this strength characteristic is about 10 percent of the compressive strength.
Meech, John +2 more
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Analysis of low velocity frontal impacts
Clinical Biomechanics, 2003The objectives of the study were to determine the phasic recruitment of cervical muscles with increasing magnitudes of low velocity frontal impacts, and to determine quantitative effects of awareness of impending impact in comparison to being impacted unawares.Biomechanics of low velocity frontal impact is poorly understood and requires more work.Ten ...
Shrawan, Kumar +2 more
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Velocity dependence of impact fluorescence
International Journal of Impact Engineering, 1997Abstract When a hypervelocity projectile with velocity, v , strikes a target, there is a visible flash of impact fluorescence. If the radiation and the material are in thermodynamic equilibrium, the “intensity”, I , of the light obeys the power law, I ∼ v n .
J.K. Baird, G.R. Hough, T.R. King
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Low-velocity impact on preloaded and curved laminates
2023Dynamic Deformation, Damage and Fracture in Composite Materials and Structures, Second Edition reviews various aspects of dynamic deformation, damage and fracture, mostly in composite laminates and sandwich structures, and in a broad range of application areas including aerospace, automotive, defense and sports engineering.
R. Panciroli +3 more
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The Exponent of the Dependence of Impact Force on Impact Velocity
Human Factors and Mechanical Engineering for Defense and Safety, 2019Injury may result if the head is struck by a projectile (e.g., a nonlethal weapon or a sports ball), even if the projectile is of small mass and has a soft exterior. Some theory is available concerning the dependence of maximum force on the impact velocity and mass of the projectile. In light of that, comments are made on recently published data.
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Discrimination of impact approximations for velocity and velocity sign autocorrelation functions
Chemical Physics, 1996Abstract The velocity and velocity sign autocorrelation functions as well as the distribution of time intervals between velocity sign changes of a particle in a gas or fluid are studied within the framework of impact theory. The results of the uncorrelated successive velocity reversal model (USVRM), for which this approach provides a limiting case of
A.I. Burshtein, A.Yu. Sivachenko
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