منابع مشابه
Surface finishing of unused rotary endodontic instruments: a SEM study.
During endodontic therapy, cleaning of root canals is performed using endodontic files and auxiliary chemical substances, and it is important that the endodontist be familiar with the instruments used in daily practice. This study evaluated, under scanning electron microscopy (SEM), the quality of the surface finishing of unused rotary endodontic instruments. Fifty sizes 20, 25 and 30 rotary fi...
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The purpose of this in vitro study was to evaluate the degree of smear layer removal after root canal preparation with TF(®) instruments, combined with two different irrigating solutions.For the present study twenty-two freshly extracted human roots were selected. All teeth had been extracted for periodontal purpose. Crown were cut off with a separating disk, so all roots were approximately 10-...
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C ouplers (or power divider/combiners) with outputs that differ in phase by 90 degrees are an important part of RF/microwave design. This tutorial provides an overview of various types of 90-degree combiners, using both lumped element and transmission line structures. Our intention is to introduce the subject to engineers who may be unfamiliar with these couplers, and perhaps offer some reminde...
متن کاملDesign and Optimization of a Rotary Actuator for a Two Degree-of-Freedom zφ-Module
The paper concerns the design and optimization of a rotary actuator which is applied in a pick-and-place robot. The rotary actuator is part of a zφ-module and provides ±180°rotation. The rotor of this actuator is attached to a linear actuator which offers a z-motion of ±5 mm. In the paper, the optimal combinations of magnet poles and coils are determined for this slotless actuator with concentr...
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The two channels of plasmonic filter structure are selective based, on a nanocavity, that proposed, and numerically simulated, by using the finite, element method by using COMSOL4.4 software package The required, filtered wavelength can, be investigated, by selecting, an appropriate length of, the nanocavity and refractive index of dielectric that filled nanocavity. Two, output channels, struct...
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ژورنال
عنوان ژورنال: Microscopy Today
سال: 2002
ISSN: 1551-9295,2150-3583
DOI: 10.1017/s1551929500057825