BACKGROUND Alexandrite (755 nm) and diode lasers (800-810 nm) are commonly used for hair removal. The alexandrite laser technology is somewhat cumbersome whereas new diode lasers are more robust. Recently, alexandrite-like 755 nm wavelength diodes became available. OBJECTIVES To compare the efficacy, tolerability, and subject satisfaction of a 755 nm diode laser operated in conventional (HR) ...

Boost derived Active Power Factor Correction (APFC) imposes high stress on the main diode and main switch due to the high reverse voltage which may result in a very high reverse current. This study analyses the engineering requirements of the diode and transistor in APFC applications and compares a design that uses a fast silicon diode plus lossless snubber to a design with a Silicon Carbide (S...

Three dimensional particle-in-cell (PIC) simulations are conducted to measure the space charge limited (SCL) currents in coaxial cylindrical diodes. New cut-cell emission and absorption boundary algorithms implemented in the electromagnetic PIC code, VORPAL are utilized for this study. Comparisons of VORPAL SCL current results are made with i) theoretical SCL current results for the one dimensi...

Direct-force measurements of the interactions between recombinant C-cadherin from Xenopus demonstrated that the ectodomain of cadherin exhibits multiple adhesive contacts that involve successive domains along the extracellular region of the protein. Contacts between the fully interdigitated antiparallel proteins form the strongest adhesive interaction. A second weaker minimum was measured when ...

The conformational equilibria of a guanine-rich sequence found at the promoter region of the human c-kit oncogene are studied by means of circular dichroism spectroscopy (CD) and variable-temperature size exclusion chromatography (SEC). It is shown that the wild sequence ckit21 exists as a mixture of monomeric and multimeric G-quadruplexes. Appropriate mutation of several bases in the wild sequ...

We have designed and characterized a magnetic template which can be switched between chains of parallel and antiparallel field distribution by applying an in-plane magnetic field. The parallel field profile creates highly mobile vortex channels in a superconducting film deposited on top, reproducing the behavior of a weak link as evidenced by the presence of Shapiro steps in the current-voltage...

An effect is considered of alternating (high-frequency) current on the spin-valve-type magnetic junction configuration. The stability with respect to small fluctuations is investigated in the macrospin approximation. When the current frequency is close to the eigenfrequency (precession frequency) of the free layer, parametric resonance occurs. Both collinear configurations, antiparallel and par...

introduction: pyogenic granuloma (pg) is a prevalent inflammatory hyperplasia of skin and oral mucosa which is often caused by constant low-grade local irritation, traumatic injury or hormonal factors. in many cases, gingival irritation and inflammation due to poor oral hygiene are precipitating factors. oral pg occurs predominantly on the gingiva, but it is also encountered on the lips, tongue...