Materials Literature
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This paper addresses the challenges arising when considering the conversion of an existing low voltage cable infrastructure in distribution networks from AC to DC. It will explore the ageing mechanisms of low AC voltage cable insulation and how could they differ when operated at DC voltages. In a DC environment, the c…
The present paper proposes an investigation of the thermal phenomena caused by Joule losses and iron losses in a novel electric machine, the dual-rotor Permanent Magnet Induction Machine (PMIM). Empirical dimensionless formulations for the computation of convection heat transfer coefficients in each region of the mach…
In this study, new phthalonitrile and phthalocyanines were synthesized and characterized. Starting material compound 3 was obtained by reaction of ninhydrin with 4-nitrophthalonitrile. Phthalocyanines 4–8 were prepared by reaction 4-(2-phenoxy-1, 3-dioxo-2, 3-dihydro-1H-inden-2-yloxy) phthalonitrile with corresponding…
In this study, poly(N-isopropylacrylamide) (PNIPAAM) hydrogels were synthesized via a liquid template polymerization method using 200–400 nm polydimethylsiloxane (PDMS) droplets as the porogens, which were stabilized by sodium dodecyl sulfate (SDS). Similar hydrogels were also synthesized with iron (III) oxide superpa…
The influence of magnetic anisotropy of a ferromagnetic film on the phenomenon of exchange bias is studied here. Hysteresis behavior in the two-spin model of a ferro/antiferromagnetic (FM/AFM) bilayer with exchange bias has been investigated in detail. In this model a half-space of an AFM with fixed magnetic configura…
To investigate the polaron hopping mechanism, thin films of polyaniline with solvent and without solvents were deposited over the surface of Al thin film and electrical properties were evaluated as a function of temperature ranging from - 60°C to 60°C. It was observed that all devices followed Arrhenius response of co…
We report a substantial increase in the heat resistance in a connector-type single-wall carbon nanotube (SWNT) saturable absorber by sealing SWNT/P3HT composite with siloxane. By applying the saturable absorber to a passively mode-locked Er fiber laser, we successfully demonstrated 280 fs, 31 mW pulse generation with…
3D NoC-based architectures have emerged to reduce the network latency, the energy consumption and total area in comparison to 2D NoC topologies. However, they are characterized by various trade-offs with regard to the three dimensional structure and its performance specifications. In this paper, we present a 3D NoC me…
Bioinspired by the spinning of spider silks, the biomimetic preparation of elastomeric fibers with micro/nano structures on the surfaces was attempted, and as a result, three types of ultrafine full-vulcanized powdered nitrile-butadiene rubber (UFPNBR)/thermoplastic polyurethane (TPU) fibers were made. The first fiber…
The tribological characteristics of nickel-aluminium bronze CuAl10Ni5Fe4 against 30CrMnSiA steel after the prior corrosion treatment was studied at the M2000A model wear tester. The wear rate of corroded specimen was less than that of uncorroded specimen at the early stage of prior corrosion treatment, while the wear…
This work involved an evaluation of a Al-4wt%Si-2.5wtCu alloy to be used as raw materials in the thixoforming process. The alloy was produced by direct casting under electromagnetic stirring to obtain ingots of 250 mm length and 30 mm diameter. The alloy was analyzed to determine their morphology and rheological behav…
In this paper surface discharge along the oil-pressboard interface was investigated. Surface discharges were measured both in time domain by means of an oscilloscope and as phase resolve patterns. The effect of temperature from 20 °C to 90 °C on surface discharge inception, extinction and surface flashover voltage wer…
In this paper, two energy management strategies considering the hydrogen consumption of hybrid power sources using a PEM Fuel Cell (FC) and Ultracapacitors (UC) are described and compared. First, the Hybrid Electric Vehicle (HEV) architecture and the associated models with their control strategies are described. The t…
In this paper, an electrical method is used to detect and locate partial discharge (PD) inside the winding of a three phases, 45 kVA transformer. PD is created in a separate cell outside the transformer winding using a needle-plane electrode arrangement and injected to each of the four taps in each phase of the transf…
In this study, a flattened light-scattering substrate (FLiSS) with a large refractive index contrast in plane is investigated as an approach for overcoming the detrimental effect of highly textured substrates for obtaining better light management in thin-film silicon solar cells. A FLiSS composed of a two-dimensional…
Rheological properties of semi-solid alloys are closely knit to the solid-phase microstructure. Parameters such as particle size distribution are commonly determined by 2D cross section analysis. The determination of mechanisms such as particle deagglomeration with increasing shear rate however, requires information o…
The field-emission (FE) characteristics were investigated for cone-shaped multi-walled carbonnanotube (MWCNT) bundles fabricated by using an oxygen plasma. Uniformly-distributed coneshaped MWCNT bundles of varying ratios of diameter to height were obtained through control of the ion energy and dose of the irradiating…
Abstract Summary: Physicochemical properties of chitosan/starch solution have been studied. Chitosan/starch solutions of different concentrations (90/10, 80/20, 70/30, 60/40, 50/50, 40/60, 30/70, 20/80, 10/90) are prepared in dilute acetic acid solution (1%, 2%, 3%, 4%). It is observed that the solution of chitosan/st…
Charge packets in insulating polymers-especially in polyethylene, have been reported by many groups in different laboratories within the last 15 years. They constitute an unexpected behavior in charge transport and understanding the mechanisms for their formation and propagation could participate in deepening our know…
Synthesis of RGO (reduced graphene oxide)-CdS composite material was performed through CBD (chemical bath deposition) method in which graphene oxide served as the support and Cadmium Sulfate Hydrate as the starting material. Graphene-based semiconductor photocatalysts have attracted extensive attention due to their us…