Materials Literature
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Transformer failures have in recent years led to the development of Resistor-Capacitor snubber circuits for the protection of the transformer and winding insulation from the damaging effects of high-voltage high-frequency transients. Transformer insulation may be damaged if the Basic Insulation Level (BIL) is exceeded…
Abstract This paper utilizes the experimental and numerical results obtained during quenching of stainless steel (SS) probes in carbon nanotube (CNT) nanofluids to arrive at an optimum CNT concentration and bath temperature for maximum quenching heat transfer rate. The individual effect of CNT concentration and bath t…
A voltage step-up/impedance transformer is presented which operates by modifying the electrode configuration of lateral-extensional mode thin-film piezoelectric-on-substrate (TPoS) resonators. The individual electrode pairs that cover the stress concentration areas of a 10thorder harmonic 30MHz resonator are connected…
Surface acoustic wave (SAW) technology, when paired with orthogonal frequency coding (OFC), has proven to be a versatile platform for the design of passive, wireless sensors. This paper presents the design and demonstration of a passive, wireless SAW strain sensor that is uniquely identifiable in a multi-sensor system…
The success of the fuel-cells technology penetration into commercial applications depends on the fuel-cells-based systems (FCS) durability, reliability and cost competitiveness. One way to improve the FCS durability is usage of advanced diagnostic methods in the context of holistic control. Electrochemical Impedance S…
In this article, we have studied a simple model of the nanothermoelectric engine with a single level quantum dot. Based on the model, expressions for the power output and efficiency of the nanothermoelectric engine are derived. The effects of a spin-degenerate level and the temperature ratio of the two reservoirs on t…
The purpose of this paper is chip package interaction(CPI) of fine pitch micro bump and trough silicon via(TSV). We focus on hot temperature storage(HTS) and electromigration (EM) due to its strong impact on reliability. In chip on chip (CoC) structure, Cu and Ni was used to evaluate under bump metallurgy(UBM) reliabi…
The core electron temperature (T(e0)) of neutral beam heated plasmas is determined in TJ-II stellarator by using soft x ray detectors with beryllium filters of different thickness, based on the method known as the foil absorption technique. T(e0) estimations are done with the impurity code IONEQ, making use of complem…
Self-assembly reactions of 5-sulfosalicylic acid (ssa) and lanthanide oxides under hydrothermal condition gave rise to two hybrid polymeric complexes, namely [Nd(ssa)(H2O)]n (1) and {[Tb(ssa)(H2O)2]·H2O}n (2). X-ray diffraction analyses reveal that complex 1 holds a three-dimensional framework and complex 2 possesses…
Measurements were performed of K-shell ionization cross sections of Ti element by 10∼30 keV positron impact using the thick-target method. The effects of multiple scattering of incident positron and from bremsstrahlung photons and annihilation photons with the thick-target method are discussed with the Monte Carlo cod…
In this paper we present the design and fabrication of air-clad planar transmission lines and TSVs that can be used as horizontal and vertical chip-chip interconnects. Performance improvement by using heterogeneous air-clad dielectric is presented for these two types of interconnect structures that establishes the bas…
Based on comprehensive consideration of elastic and plastic deformation of both strip and work roll, an online rolling force model for tandem cold rolling mill has been developed by numerical integration method in this paper. According to the load equilibrium equation and the boundary condition, the vertical stress of…
A novel method to synthesize nesquehonite, MgCO3· 3H2O, via reaction of a flux of gaseous CO2with Mg chloride solution at ambient conditions, performed using a reactor, is here described. The reaction rate of the process is rapid, with deposition of abundant carbonate in few minutes. The results of a multi-disciplinar…
Temperature dependencies of density (by the gamma-penetrating method), electrical resistivity (by the contact-less method in rotating magnetic field), and magnetic susceptibility (by the Faraday method) of Sn-Bi alloys with near-eutectic compositions are investigated. The alloy with eutectic composition, Sn —58% (mass…
In the context of global warming, major changes are expected in the worldwide energy matrix in the near future. Biomass, a renewable source, as a raw material for energy production, is fundamental in this process. By definition, biochar is any source of biomass.
This paper deals with static and dynamic analysis of the Switched Reluctance Motor (SRM) under fault operating conditions. The static analysis is carried out by means of Finite Element Method (FEM) to investigate static parameters of the SRM for health and some defined faults of the phases. These static parameters are…
A narrow band micro strip patch antenna with "Pentagonal Rings" shaped metamaterial cover is proposed and analyzed at a height of 3.2mm from the ground plane. The antenna along with the proposed metamaterial cover is designed to resonate at 2.31GHz frequency (in S-Band). Proposed metamaterial cover significantly reduc…
Collagen provides cardiovascular tissues with the ability to withstand haemodynamic loads. A similar network is essential to obtain in tissue-engineered (TE) samples of the same nature. Yet, the mechanism of collagen orientation is not fully understood. Typically collagen remodelling is linked to mechanical loading. H…
This paper presents an analytical model for predicting the open-circuit, armature reaction, and load eddy current loss in the conductive retaining sleeve of surface-mounted permanent magnet machines accounting for slot opening and tooth-tips. The finite element results confirm the high accuracy of the developed model…
Power transformers are critical and expensive components of power networks, especially large power transformers. Assessment of their condition and diagnosis of faults involves several tests. One of the most important aspects of transformer assessment is the detection of mechanical displacements or deformations of tran…