With the rapid growth of interventional MRI, radiofrequency (RF) heating at the tips of guidewires, catheters, and other wire-shaped devices has become an important safety issue. Previous studies have identified some of the variables that affect the relative magnitude of this heating but none could predict the absolute amount of heating to formulate safety margins. This study presents the first...

The tibial tubercle osteotomy is gaining popularity for revision total knee arthroplasty; however, the potential for tubercle displacement has been a concern. This study compared the mechanical behavior of the tibial tubercle osteotomy after screw and cerclage wire fixation. Tibial tubercle osteotomy was done on 40 tibias from cadavers with equal numbers fixed by either screws or wires. Specime...

The present note describes a machine development (MD) aimed to confirm experimentally the need for protection of the extraction wire septum ZS in SPS long straight section LSS6 [1] during LHC operation. Single wires identical to the ones mounted on the extraction septum were fixed on a fast wire scanner and put into the beam path. The beam heated the wire until it broke after a measured number ...

'Betty' the New Caledonian crow astonished the world when she 'spontaneously' bent straight pieces of garden wire into hooked foraging tools. Recent field experiments have revealed that tool bending is part of the species' natural behavioural repertoire, providing important context for interpreting Betty's iconic wire-bending feat. More generally, this discovery provides a compelling illustrati...

The purpose of this study was to compare the severity of apical root resorption occurring in patients treated with a standard edgewise and a straight-wire edgewise technique, and to assess the influence of known risk factors on root resorption incident to orthodontic treatment. The sample consisted of 80 patients with Angle Class II division 1 malocclusions, treated with extraction of at least ...

The strain induced critical current degradation of overpressure processed straight Bi-2212/Ag wires has been studied at 77 K in self-field. For the first time superconducting properties, lattice distortions, composite wire stress and strain have been measured simultaneously in a high energy synchrotron beamline. A permanent Ic degradation of 5% occurs when the wire strain exceeds 0.60%. At a wi...

In many situations, the dual-purpose heater/thermometer wires used in three-omega method—one of most precise and sensitive techniques for measuring thermal conductivity thin films interfaces—must include bends curves to avoid obstructions on surface a sample. Although analysis assumes that heating wire is infinitely long straight, recent experimental work has demonstrated that, some cases, curv...

This paper analyses the collimation behavior of a wire medium devoted to magnetic resonance imaging. In a first part, the point spread function of a doubly infinite wire medium is analyzed for the magnetic field with the help of the Array Scanning Method. In a second part, we present two methods to evaluate the field transmission by the wire medium, based on the measure of the magnetic field co...

The ability to predict the geometry of weld bead plays a key role in accurate path planning and determination welding parameters wire arc additive manufacturing. However, little attention has been paid its prediction when deposition is not straight. Thus, this work focuses on 3D reconstruction based path. One main findings paper that shape changes from symmetrical cross-section straight portion...