The use of electromagnetic induction lamps without electrodes has increased because of their long life and energy efficiency. The control of the ignition and luminosity of the lamp is provided by an electronic ballast. Beyond that, the electronic ballast also provides a power factor correction, allowing the minimizing of the lamps impact on the quality of service of the electrical network. The ...

We study an extension of the gravity dual to a perfect fluid model found by Janik and Peschanski. By relaxing one of the constraints, namely invariance under reflection in the longitudinal direction, we introduce a metric ansatz which includes off-diagonal terms. We also include an R-charge following Bak and Janik. We solve the Maxwell-Einstein equations and through holographic renormalization,...

The subband structure of nanowires is commonly obtained through an atomistic tight binding approach. In this work an alternative, continuum based method is investigated, namely a two-band k ·p approximation of the conduction band structure. A derivation of the subband Schrödinger equations from the bulk model and their numerical solution are presented for [100] nanowires. Self-consistent simula...

OBJECTIVE To study the pattern of innervation of the conduction system of the neonatal heart in humans. DESIGN A prospective analysis based on immunohistochemical and enzyme histochemical examination of newborn human hearts. SETTING A general district hospital. MAIN OUTCOME MEASURES Fresh necropsy tissue. MATERIAL Hearts of three neonatal humans with no cardiac anomaly, freshly taken at...

AIMS Reentrant arrhythmias often develop in the setting of myocardial infarction and ensuing slow propagation. Increased Na(+) channel expression could prevent or disrupt reentrant circuits by speeding conduction if channel availability is not limited by membrane depolarization within the diseased myocardium. We therefore asked if, in the setting of membrane depolarization, action potential (AP...

It was previously shown by Verworn (1) and Lucas (2) that the excitation decreased in magnitude as it travelled through the narcotized region of the medullated nerve. Afterwards, Koike (3) and Putter (4) obtained a conflicting result, and in keeping with it, Kato (5) introduced, after many experimental researches with his collaborators, the theory of decrementless conduction in narcotized regio...

In this work we solve the set of hydrodynamical equations for accretion disks in the spherical coordinates (r,θ,ϕ) to obtain the explicit structure along θ direction. We study a two-dimensional advective accretion disc in the presence of thermal conduction. We find self-similar solutions for an axisymmetric, rotating, steady, viscous-resistive disk. We show that the global structure of an advec...