Materials Literature
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The species composition of the soil algae and cyanobacteria in the Tra-Tau and Yurak-Tau mountains is represented by 136 species belonging to five phyla: Cyanobacteria (56 species), Chlorophyta (52 species), Xanthophyta (13 species), Bacillariophyta (12 species), and Eustigmatophyta (3 species). Hantzschia amphioxys v…
In this paper, the thermal impact of using different steel laminations in the stator and the rotor of a permanentmagnet assisted synchronous reluctance machine designed for an automotive application is studied. In this regard, two main parameters of the steel lamination materials, thickness and amount of alloy content…
Fragmentation testing is frequently used to probe film fracture strain and the interfacial properties of thin brittle films on compliant substrates. A model based upon complete yield of the film/substrate interface is frequently used to analyse data after cracking has saturated. Additionally, the film is either assume…
Decomposition of hydroxylamine in HNO 3 solutions containing 350 to 920 g l −1 U(VI) was studied. In the absence of fission and corrosion products (Zr, Pd, Tc, Mo, Fe, etc.), hydroxylamine is stable for no less than 6 h at [HNO 3 ] < 1 M and 60°C. In the presence of these products, the stability of hydroxylamine appre…
The ability to diagnose the integrity of the transformer windings and core through online diagnostic method would be useful for electric utilities who are concerned about the availability and reliability of power transformer. This paper presents results of a study to identify the condition of power transformer winding…
In this study, the changes in the chemical form of calcium on reduction with solid carbon were investigated in order to develop a process for the regeneration of CaO from spent gypsum at low temperatures. Calcium sulfate dihydrate was used as a model compound for gypsum; it was mixed with solid carbon and heated to a…
The paper presents a comparison of gas solubility of different mineral oils as well as ester-based transformer insulating fluids. The maximum gas solubility of different gases, e.g. ambient air, nitrogen or fault gas is determined. Also, the solubility of a gas mixture in transformer oil is analysed. In addition, the…
This paper describes the results of our experimental study on four binary systems containing o-chlorophenol (OCP) as the common component and the second component is, cinnamaldehyde orbenzaldehyde or N,N-dimethylacetamide or n-hexane. The measured speed of sound (u), density (ρ), viscosity (η) and refractive index (μ)…
This paper aims to find a new technique to predict the state of health of power converters by characterizing the most vulnerable components in the converter without affecting the normal circuit operation. Spread spectrum time domain reflectometry (SSTDR) can detect most of the aged components inside the converter whil…
Electrodeposited chromium coatings offer high levels of mechanical and tribological properties that justify their use in many industrial and engineering applications. However, one problem of these functional coatings is their limited corrosion resistance and the low current efficiency of their electrodeposition proces…
This study demonstrated that surfactants can significantly improve the dispersion stability of milled boric acid particles over a broad range of operating temperatures. The tribological performance of boric acid and surfactant [sorbitan trioleate (STOMO)] mixed in the base oil was investigated under cylinder-on-plate…
Finite element models of a simplified vehicle-like structure have been used for preliminary investigations of the likely impact of vehicle bodyshell materials and structures on in-vehicle low frequency magnetic fields, such as those associated with currents flowing on the power cables of electric vehicles. The simulat…
Normal 0 MicrosoftInternetExplorer4 According to existing provisions, large separation distance has to be maintained between two conventional explosive storage structures to prevent sympathetic detonation. In this paper, reduction of the separation distance with the use of earth covered laced reinforced concrete (LRC)…
This paper looks at a systematic investigation on split ratio to minimize the AC losses of vertically placed rectangular conductors in concentrated-wound surface mounted PM synchronous machines having fault tolerant (FT) capability. The repeated numerical design optimization is carried out in Finite Element (FE) to ac…
Abstract The performance‐based durability design of reinforced concrete structures for corrosion of reinforcement is currently limited to the initiation period. That includes modelling the transport processes of chlorides and carbon dioxide into the concrete structure. Up to now, the subsequent time period after depas…
The representation of induction machine parameters, according to the high-frequency (HF) behavior of the machine impedances, has been previously presented in the literature. Methods to extract them from the measured HF machine impedances have been also presented. It has been found that a representation of the distribu…
Electrically insulating Al2O3-SiO2thin coatings have been deposited on long-length 316 stainless steel (SS) tape using a reel-to-reel continuous solgel dip coating process for cowinding insulation into YBCO pancake coils, a high-temperature superconductor magnet technology. Coatings with a thickness of ~ 5 μm are achi…
This paper deals with the Fuzzy Direct Power Control (F-DPC), a new control approach applied to shunt active filters. The F-DPC controller regulates the DC-link voltage, active and reactive power-flows of the power filter. The principle of this control is based on fuzzy controller. The steady and dynamic behaviors of…
Abstract Various ion cyclotron resonance heating (ICRH) scenarios relevant for the D–T phase of the JET tokamak are studied. Recent ICRH experiments in JET (3He)–D and (3He)–H plasmas confirmed the possibility of electron heating enhancement in the mode conversion (MC) regime due to the constructive interference of th…
AlGaN/GaN high electron mobility transistor (HEMT) was grown on silicon carbide substrate by metalorganic chemical vapor deposition technique. The AlGaN/GaN structure was optimized by tuning the growth conditions such as AlN buffer thickness, and the Al composition and thickness of AlGaN barrier layer. As a result, th…