In this paper three-dimensional (3-D) suspended helical nanobelts (HNBs) with ultra-high flexibility are assembled by the external field guidance. Electromagnetic (EM) and electrostatic (ES) force by external potential are characterized quantitatively to guide the assembly of HNBs to create force sensing probe. Both ends of HNBs and target electrodes are attached with ferromagnetic metal connec...

As a vital component of electronic products, the quality printed circuit board (PCB) assembly directly affects applications and service life. During reflow soldering process, PCB may suffer excessive warpage. Therefore, in order to avoid such failure, this paper conducts finite element simulation temperature change deformation process according theoretical model for heat transfer then explores ...

Background: Different soldering techniques have a variety of applications in dentistry. One of the most important uses of soldering is to join multiple-unit fixed partial dentures together. In this Study, two base metal alloys (Supercast and Minalux) were soldered  and their tensile, compressive and flexural strengths were measured and compared to each other. Materials and methods: In this ...

Most occupational asthma from electronic solder fluxes is due to colophony (1, 2). We report the first case of occupational asthma to electronic colophony-free gel flux predominantly containing dodecanedioic acid. The patient worked as an electronics instructor from 1999; he initially used solder wire and a separate flux (both colophony). In 2002, he changed to a colophony-free solder wire (pre...

An inadequate fit at the abutment/implant interface can generate mechanical and biological problems. The laboratorial stages could induce misfit in such interface when the castable UCLA abutment type is used. The purpose of this study was to comparatively evaluate the performance of three prosthetic laboratories (Labs A, B and C) by vertical fit analysis of castable UCLA abutments on the castin...

This study discusses the automated visual inspection of electronic boards used in mass production power electronics equipment. Soldering splashes, produced during necessary manufacturing stages, can affect hybrid semiconductor modules' quality, specifications and lifespan. Splashes from soldering may appear some areas when they cause decreasing quality these need to be removed. Image analysis a...