background: sterilization techniques could affect the characteristics of orthodontic wires. the aim of the present study was to evaluate the effect of steam and dry heat sterilization techniques on load-defl ection behavior of fi ve types of β-titanium alloy wires. materials and methods: the samples consisted of 30 straight lengths of fi ve types of β-titanium alloy wires: titanium molybdenum a...

Coaxial straight-wire resistors have been constructed with the purpose of improving comparisons between resistors, capacitors, and inductors in the audio frequency range. The design is based on the principle that a coaxial line with a cylindrical shield can be described by relatively simple equationsfor the real and imaginary parts of the impedance. The resistors, with values above 100 n, will ...

We demonstrate the possibility of dynamic imaging of magnetic fields using electromagnetically induced transparency in an atomic gas. As an experimental demonstration we employ an atomic Rb gas confined in a glass cell to image the transverse magnetic field created by a long straight wire. In this arrangement, which clearly reveals the essential effect, the field of view is about 2 x 2 mm(2) an...

Suppose a hounded distribution of time-dependent sources in free space is as shown in Figure 1. The retarded electric ( ( F , t ) The primary goal ofthis paper is tutorial. It discusses, from a and magnetic A(r, t ) potentials at the observation point physical point of view, several basic features related to the transient radiation of electromagnetic waves by straight thin-wire P = P(r ,O ,q ) ...

In this paper, we present a model of straight wire dipole scatterers loaded by arbitrary lumped loads in the dipole center. These particles can be used as inclusions of custom-design composite materials or electrically controllable metamaterials. The model, together with the Clausius–Mossotti formula and an analytical model for reflection and transmission in dipole arrays, allows to find loads ...

We consider a model of a leaky quantum wire with the Hamiltonian −∆ − αδ(x − Γ) in L 2 (R 2), where Γ is a compact deformation of a straight line. The existence of wave operators is proven and the S-matrix is found for the negative part of the spectrum. Moreover, we conjecture that the scattering at negative energies becomes asymptot-ically purely one-dimensional, being determined by the local ...

A 12-year-old female patient presented with proclined upper anteriors on a class II skeletal base, a retrognathic mandible and high maxillary- mandibular plane angle. Lower first molars were mesially tipped and lower second premolars were impacted. Treatment plan included uprighting and distalising the lower molars followed by growth modulation with Jasper Jumper to correct the mandibular retro...

conclusions excellent esthetic and functional results achieved; total treatment duration was about 72 months. case presentation this is a case report about the successful orthodontic treatment of a patient with mild hemifacial microsomia (hfm), using a non-surgical orthopedic and orthodontic treatment approach. the aim of this approach was to make the best noninvasive modality to treat hfm. a 7...

IT occurred to me some time ago that, if one used a straight needle so that in placing sutures there was no bending force applied by the needle-holder, this needle could be greatly reduced in diameter. This smaller cross-section would in turn allow it to penetrate tough tissue such as the cornea much more easily. Further, I felt that with a straight needle one could place sutures much more accu...