Results 221 to 230 of about 14,645 (268)
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The effect of pin location on the rigidity of the halo pin-bone interface
Neurosurgery, 1990Abstract Optimal insertion of halo fixation pins to maximize the rigidity of the interface between the halo pins and the outer table of the skull is important in reducing the incidence of pin loosening. An in vitro biomechanical study was performed using cadaver skulls to investigate the effects of pin location on the rigidity of this ...
R T, Ballock +4 more
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Pin Clearance Effect on Pinned Connection Strength
Journal of Structural Engineering, 1986Reduction of the ultimate strength of pinned connections as a result of large clearance between the pin and the hole is discussed. Test data are used to develop curves quantifying this reduction for the two primary modes of failure for pin plates. General suggestions are made for the design of pinned connections in which the pin-to-hole clearance may ...
David Duerr, George Pincus
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Parapulpal pins and their effects on the fracture resistance of pin‐retained cores
Journal of Oral Rehabilitation, 1991SummaryThe bending characteristics of various parapulpal pins, the retention of a parapulpal pin in different core buildup materials, and the fracture resistance of pin‐retained cores were investigated in an in‐vitro study. In amalgam and composite cores, the use of parapulpal pins produced an increase in fracture resistance.
B, Haller, W, Götze, G, Weiss
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Effect of Fixation Pin Insertion on the Bone‐Pin Interface
Veterinary Surgery, 1986Smooth and partially threaded 3.12 mm (1/8 inch) trochar‐tipped Steinmann pins were inserted transversely through both diaphyseal cortices of eight mature canine tibias using five methods. Angular velocity (revolutions per minute) during insertion and temperature elevation due to friction during penetration of the second cortex were recorded. The force
ERICK L. EGGER +3 more
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Collective pinning and the Hall effect in superconductors
Physical Review B, 1995We calculate the mixed-state longitudinal and Hall resistivity of superconductors based on the perturbation approach of Schmid and Larkin with a frictional force of the form proposed by Vinen and Warren under the influence of randomly distributed weak point pinning centers.
, Liu, , Clinton, , Lobb
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Comparison of 2 Equine Transfixation Pin Casts and the Effects of Pin Removal
Veterinary Surgery, 2014ObjectiveTo (1) compare strain on the dorsal aspect of the proximal phalanx (P1) between 2 types of transfixation pin casts (TPC) and (2) evaluate the change in strain as the pins are removed.Study DesignExperimental.AnimalsEquine cadaver forelimbs (n = 10 pair).MethodsEach limb of a pair was assigned to 1 of 2 TPC constructs.
Jarred M, Williams +2 more
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Pinning Effects in Nb Thin Films with Artificial Pinning Arrays
Journal of Superconductivity and Novel Magnetism, 2010We summarize some results on the behavior of vortex dynamics and pinning effects in superconducting films with artificial pinning centers. Superconducting thin films with regular arrays of holes were fabricated using electron-beam lithography and reactive dry etching techniques.
R. Cao +4 more
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Allee Effects, Invasion Pinning, and Species’ Borders
The American Naturalist, 2001All species’ ranges are the result of successful past invasions. Thus, models of species’ invasions and their failure can provide insight into the formation of a species’ geographic range. Here, we study the properties of invasion models when a species cannot persist below a critical population density known as an “Allee threshold.” In both spatially ...
Holt, R. D. +2 more
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The pinning effect in quantum dots
AIP Conference Proceedings, 2014The pinning effect is studied in a Gaussian quantum dot using the improved Wigner-Brillouin perturbation theory (IWBPT) in the presence of electron-phonon interaction. The electron ground state plus one phonon state is degenerate with the electron in the first excited state.
P. J. Monisha, Soma Mukhopadhyay
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Renormalized Energy with Vortices Pinning Effect
Journal of Partial Differential Equations, 2000This theoretical paper is a continuation of a previous paper [\textit{S. Ding, Z. Liu}, J. Partial Differ. Equations 10, No.~2, 174-192 (1997; Zbl 0887.35022)]. The author derives the renormalized energy to further determine the location of vortices for the variational problem related to the superconducting thin films having variable thickness.
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