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Advances in small scale fabrication processes have led to the advent of very thin flexible devices such as flexible RFID tags and smart clothing. In a geometrical sense, these present themselves as curved 2D open surfaces embedded in a 3D domain. When simulating EM behavior on these surfaces at low frequencies, a full 3D field model can become computationally expensive in terms of memory and run times...
A topic of interest related to titanium alloy Ti-6Al-4V implants is optional surface treatment. In many cases surface treatment is used for bioactivation of the implant and thereby improvement of its biocompatibility and osseointegration. An important factor of surface properties in the context of applying coatings is its roughness. This paper discusses the design of test samples (plates). It is aimed...
The comparison of temperatures (temperature correlation) obtained by measuring instruments and by thermal simulation is commonly necessary. Currently the way in which thermal maps are obtained by infrared thermographer yields inaccurate results since the emissivity values of all elements in an IC are ignored and measurement method assumes a constant emissivity. Without the correct settings of emissivity...
In this study we report the fabrication of pure CeCO2, ZnO deposited CeCO2 hybrid core-shell nanoparticles by simple and cost effective co precipitation method. The as synthesized samples were characterized by various experimental techniques such as XRD (X-ray diffraction), FTIR (Fourier Transform Infrared Spectroscopy), UV-Vis absorbance and HRTEM (High Field Transmission Tunneling Microscopy) measurements...
The design constraints of gas insulated switchgear(GIS) are changing due to an increasing power demand and decreasing available floor space for substations. Ideally, new GIS should operate at a higher nominal voltage with a minimal or no increase in size. Another ongoing development in the power industry is the desire to replace SF6 by an environmentally friendly gas which is preferably readily available...
A construction of laboratory apparatus for heat treatment of titanium implants by high-frequency currents is described. Dependencies of heating of titanium implant samples at different power consumption were defined. Novel matrix coatings of titanium dioxide with colloidal hydroxyapatite (nanophase filler) were produced on the surface of medical items, which are made of commercially pure titanium...
In order to elaborate a very strong hydrophilic phosphate masses coating on titanium, an electrodeposition method was performed after polishing, etching and ultrasonication of samples. Electrodeposition took place in three electrodes cell at different working parameters (time and temperature). After electrodeposition all samples were calcinated for 1 hour at 4000C, in order to increase the crystalinitty...
A shift of paradigm in theory and practice of product design requires a review of existing technologies of decorative surface treatment in the direction of adaptation to changing system of formation. Aesthetic benefits of different surface treatment technologies have been revealed. Recommendations on the choice of technology of surfaces decoration considering specificity of art objects were proposed...
We propose an immersive projection display with dynamic reflectance control using photochromism. The reflectance control is effective for inter-reflection compensation. Software-based inter-reflection compensation techniques, which are conventional techniques, suffer from the projector's limited dynamic range in reproducing the target appearance on immersive projection screens. To solve this problem,...
Observation and evaluation of damage growth on contact surfaces caused by arc discharges are important for realizing better understandings of contact phenomena. For that purposes, an experimental system enabling observation and evaluation of growth processes of a crater or a pip (damage shapes) during switching operations has been constructed. Up to now, evaluation of a movable cathode surface profile...
In this study the bending reliability of an isotropic conductive adhesive (ICA) filled between two printed circuit foils (PCF) as interconnection for a System-in-Foil is evaluated. The filling is realized by a Jet-Dispense process on oxygen plasma treated, as well as non-plasma treated foils. The samples are tested on a bending test setup capable of real-time electrical measurements during bending...
Radio frequency (RF) structures that are part of accelerators and energy sources, operate with sinusoidally varying electromagnetic fields under high RF energy. Here, RF breakdown and multipacting take place in RF structures and limit their performance Electron field emission processes in a RF structure are precursors for breakdown processes. RF breakdown is a major phenomena affecting and causing...
Anode surface temperature after interrupting a vacuum arc has a significant impact on the interruption capacity of a vacuum circuit breaker (VCB) because it dominates metal vapor evaporation. The objective of this paper is to theoretically investigate the relationship between breakdown voltages and anode surface temperatures after current zero. A heat transfer model was established to describe the...
This paper, taking the docking application between RT03 industrial robot and surface grinder based on PLC for example, researches the docking technology between machine tool and industrial robot, and how to realize the optimization in the process. Practice has proved that using auto feeding of the industrial robot on the machine tool can greatly improve production efficiency and product quality.
Crankshaft as the heart of the piston engine, this paper uses aviation engine crankshaft as the research object, introduces the classification of metal heat treatment process, and analyzes the working conditions, material selection, crankshaft forging temperature and heat treatment process. And as the crankshaft heat treatment quenching cracks, oxidation and decarburization an example, analysis the...
The aim of this ethnographic study is to understand welding practices in shipyard environments with the purpose of designing an interactive robot welder. The robot is meant to help workers with their daily job while being deployed on a jack-up rig. The design of the robot, including its user interface turns out to be a challenging task due to several problematic conditions encountered on the shipyard:...
New surface treatment systems hybridized with cup-stacked carbon nanotubes(CSCNTs) featuring anti-corrosion and anti-impact were developed applied for aluminum alloy using under the deep seawater such as pressure vessel at 3,000m in depth. The coated test specimens were passed at pressurization test under the increase and decrease pressure ratio 2MPa per minute and 15 minute kept at maximum pressure...
Die to die interconnection in wirebonding process these days is just common in particular to the mature packages using Gold (Au) wire as mean for interconnection. With the intense market competition to deliver a much competitive cost of the products more manufacturers, sub-contractors and even IDM (integrated device manufacturing) are now inclined with the use of Copper (Cu) wire as an alternative...
Thermal issues increase with the electronic industry pushing towards fast in high speed, high density, and high performance. Thermal conductive materials are strongly demanded for increasing heat dissipation and reducing operating temperature of devices. Hexagonal boron nitride (h-BN) nanosheet that owns high thermal conductivity and low coefficient of thermal expansion is a good filler candidate...
The improvement in materials strength as days goes and goes, hybrid type of unconventional machining process has been developed and continuous. In that case researchers developed the combined process of Electro Chemical Machining (ECM) and Electrical Discharge Machining (EDM) for increase the quality of the components. In this current review work, the setting of different levels of parameters in Electro...
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