Cooling in liquid nitrogen is a typical service condition of high-temperature superconducting wire, and the variation boiling stages on wire protective layers such as brass could be crucial for quench behavior devices. In this study, influence surface morphology (parameters roughness fractal dimension) Leidenfrost effect (including wall superheat at critical heat flux point, which are respectiv...

Abstract Despite its excellent exploitation properties, the non-conductivity of aluminum-$$$based oxide ceramics significantly limits application and remains an actual science technology challenges. An approach to electrical discharge machining Al2O3 using a triple copper coating with thickness ∼120 µm as auxiliary electrode assisting TiO2-suspension powder particle concentration 50, 100, 150 g...

Novel micro-structured string-reactor designed as catalytically active wires placed in parallel into a tube was developed. The small diameter of the channels (∼100 m) leads to a short radial diffusion time, a narrow residence time distribution (RTD), and a low pressure drop. This reactor was applied for the oxidative steam-reforming of methanol (OSRM) to produce hydrogen in autothermal mode for...

The aim of this in vitro study was to evaluate the frictional forces between bracket and archwire that included three passive self-ligating brackets (Damon SL2 SDS). The brackets were individually bonded to a brass mount using a preformed 0.021 x 0.025 inch stainless steel wire jig in order to exclude adverse tipping or torsion. The central bracket was positioned 1 mm higher than the others, in...

BACKGROUND Metals are present in electronic cigarette (EC) fluid and aerosol and may present health risks to users. OBJECTIVE The objective of this study was to measure the amounts of tin, copper, zinc, silver, nickel and chromium in the aerosol from four brands of EC and to identify the sources of these metals by examining the elemental composition of the atomizer components. METHODS Four ...

Abstract Possibilities of improving the workability CuZn37 brass thin wire in a diameter 0.14–0.18 mm produced by dieless drawing processes were explored. The was defined as maximum final longitudinal strain up to its fracture, achievable process. Two technologies developed and their compared. first one is classical one-pass process; second, multi-pass one. For both technologies, it possible ob...

In this paper, we propose a fuzzy aggregate production planning (APP) model for blending problem in a brass factory which is the problem of computing optimal amounts of raw materials for the total production of several types of brass in a period. The model has deterministic and imprecise parameters which follows triangular possibility distributions. The brass casting APP model can not always be...