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  • Methods
  • To compare surgically induced astigmatism (SIA) and refractive outcomes between two operation methods for late in-the-bag IOL dislocation. (arvojournals.org)
  • Despite its importance for daily life activities, only a few studies have compared refractive outcomes between different operation methods for late in-the-bag IOL dislocation, 3 , 11 - 14 and to our knowledge, no previous randomized trial has been conducted. (arvojournals.org)
  • joint
  • The treatment of realigning bones after a dislocation includes reducing pain through modal therapies and simple manoeuvres that manipulates the joint to the reposition. (medgatetoday.com)
  • To compare percutaneous minimally invasive repair (PMIR) of acute acromioclavicular (AC) joint dislocation under ultrasound guidance (PMIR-UN) vs. C-arm navigation (PMIR-CN). (readbyqxmd.com)
  • An infant with a congenital hip dislocation is born with abnormal alignment between the femur and the pelvis at the hip joint. (freemd.com)
  • displacement
  • Interestingly, from this point of view the Volterra dislocation formulation with discontinuous displacement, and non-square-integrable energy appears as a large-length scale limit of a smoother microscopic problem. (imechanica.org)
  • An explicit formula for the displacement jump of a single localized composite defect line in terms of given g.disclination and dislocation strengths is deduced based on the Weingarten theorem for g.disclination theory at finite deformation. (imechanica.org)
  • Between the adjacent grains of a polycrystalline material, geometrically necessary dislocations can provide displacement compatibility by accommodating each crystal's strain gradient. (wikipedia.org)
  • 1934
  • The theory describing the elastic fields of the defects was originally developed by Vito Volterra in 1907, but the term 'dislocation' to refer to a defect on the atomic scale was coined by G. I. Taylor in 1934. (wikipedia.org)
  • defect
  • In materials science, a dislocation or Taylor's dislocation is a crystallographic defect or irregularity within a crystal structure. (wikipedia.org)
  • Mathematically, dislocations are a type of topological defect, sometimes called a soliton. (wikipedia.org)
  • The viewer may then start to simplify the representation by visualising planes of atoms instead of the atoms themselves (Figure A). An edge dislocation is a defect where an extra half-plane of atoms is introduced midway through the crystal, distorting nearby planes of atoms. (wikipedia.org)
  • deformation
  • Dislocation creep is a deformation mechanism in crystalline materials. (wikipedia.org)
  • However, this approach completely fails to account for well-known intermittent deformation phenomena such as the spatial localization of dislocation flow into "slip bands" (also known as Lüders band) and the temporal fluctuations in stress-strain curves (the Portevin-Le Chatelier effect first reported in the 1920s). (wikipedia.org)
  • The amplitudes of the acoustic signals can be related to the area swept by the fast-moving dislocations and hence to the energy dissipated during deformation events. (wikipedia.org)
  • Simulation results also revealed the scale free nature of dislocation avalanches and concluded that deformation of crystals having highly mobile dislocations exhibits the attributes of a self-organized critical (SOC) process. (wikipedia.org)
  • detach
  • Informal spoken French uses right dislocation very naturally and extensively, to detach semantic information from the grammatical information. (wikipedia.org)
  • Plasticity
  • A demonstration through an example is given of how the Volterra dislocation formulation in linear elasticity can be viewed as a (formal) limit of a problem in plasticity theory. (imechanica.org)
  • displaystyle
  • Dislocations motions are characterized by an average velocity τ = ρ b v ¯ {\displaystyle \tau =\rho b{\bar {v}}} which is known as Orowan's equation. (wikipedia.org)
  • Dislocation dynamic simulation has shown that τ {\displaystyle \tau } is close to 1.5, which is in good agreement with mean-field theory prediction. (wikipedia.org)
  • density
  • It can be shown that the stress produced by a spatially uniform dislocation density field in a body comprising a linear elastic material under no loads vanishes. (imechanica.org)
  • In such a system, the density of geometrically necessary dislocations can be estimated by considering an average grain. (wikipedia.org)
  • injuries
  • Dislocations are caused by falls and hard impacts, such as in sports injuries, and are more common in teens than young children. (kidshealth.org)
  • People who have larger Q angles tend to be more prone to having knee injuries such as dislocations, due to the central line of pull found in the quadriceps muscles that run from the anterior superior iliac spine to the center of the patella. (wikipedia.org)
  • Several other injuries are also associated with hip dislocation. (wikipedia.org)
  • grain
  • The utility of the notion of generalized disclinations in materials science is discussed within the physical context of modeling interfacial and bulk line defects like defected grain and phase boundaries, dislocations and disclinations. (imechanica.org)
  • When it reaches a grain boundary, the dislocation will disappear. (wikipedia.org)
  • rarely
  • A dislocation line is rarely uniformly straight as in the figure, often containing many curves and/or steps to facilitate movement through the crystal in incremental amounts, rather than shifting the entire line at once. (wikipedia.org)
  • Anatomy
  • It is important the joint is reduced as soon as possible, as in the state of dislocation, the blood supply to the joint (or distal anatomy) may be compromised. (wikipedia.org)
  • often
  • The dislocation-in the strong sense of the term as removal of a thing from its proper place-and circulation of names is by no means new or unusual: geography bears the marks of the past and these marks in turn make it possible to for us to trace the often-violent histories of contact, exchange or extraction, and dissemination that have supplied (that is: dislocated, relocated, and recoded) those names. (jhu.edu)
  • Dislocations are often caused by sudden trauma on the joint like an impact or fall. (wikipedia.org)
  • A dislocation often damages the underside of the kneecap and the end of the thighbone, which can lead to additional pain and arthritis. (emoryhealthcare.org)
  • From the moment of dislocation, use pain as the determining factor for how often Arnica Montana ought to be administered. (disabled-world.com)
  • contrast
  • They are in contrast to statistically stored dislocations, with statistics of equal positive and negative signs, which arise during plastic flow from multiplication processes like the Frank-Read source. (wikipedia.org)
  • By contrast, left dislocation is like clefting: it can be used to emphasize or define a topic. (wikipedia.org)