Materials Literature
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Design and characterization of Schiff based liquid crystalline nO.m compounds exhibiting hexagonal smectic phases are reported. Crystallization kinetics investigations are carried out in the liquid crystals (LCs) exhibiting hexagonal ordered orthogonal and tilted precursor LC phases by calorimetry. The Avrami theory i…
This paper presents the utilization of energy storage device composed of supercapacitor bank for future electric vehicles with a hydrogen fuel cell (FC) as the main power source. The study mainly focuses on the innovative control law based-on flatness properties for fuel cell/supercapacitor hybrid power source. Utiliz…
One presents some aspects related to the behavior of a three-phase power transformer used in the excitation circuit of a power group. The excitation transformer is directly supplied from the three-phase generator terminals. It supplies a fully controlled rectifier with thyristors, through which the main generator's ex…
In this paper a method for the broken rotor bar fault detection of induction squirrel cage machines is presented. This method is based on measurements and frequency analysis of the sum of the stator phase currents (the stator circular current) for delta connected windings. For the case of the star connected windings t…
Present research deals with comparative studies, analysis and experiments between three types of supercapacitors packs, in order to obtain the optimal structures for applications in which they are integrated. Two of proposed packs are high voltage used in electrical vehicle sphere and one is realized for low power cir…
As chip multiprocessors transition from multi-core to many-core, on-chip network power is increasingly becoming a key barrier to scalability. Studies have shown that on-chip networks can consume up to 36% of the total chip power, while analysis of network traffic reveals that for extended periods of execution time, ne…
The two-scale elasto-viscoplastic deformation behavior of amorphous polymer was investigated using the large deformation finite element homogenization method. In order to enable a large time increment for the simulation step in the plastic deformation stage, the tangent modulus method is introduced into the nonaffine…
The buckling analysis of fuel rods during an end drop impact of a spent fuel transportation cask has traditionally been performed to demonstrate the structural integrity of the fuel rod cladding or the integrity of the fuel geometry in criticality evaluations for a cask drop event. The actual calculation of the fuel r…
Polycrystalline films of semiconducting Cu(In1-xGax)Se2(CIGS) quaternary alloy, one of the promising materials for photovoltaic applications, have been prepared by means of chemical spray pyrolysis (CSP). Copper, Indium and Gallium metal chlorides and Selenourea are used as constituent elements to prepare spray soluti…
It is a known fact, that three-dimensional FE-Simulations are very slow, which prevents their usability in larger system models. In this paper, a Matlab/Simulink model for a TFM is developed to enable fast simulations of complete drive systems with power converters and other components. The model is derived by incorpo…
We discuss the mechanical and thermal design of a high temperature pressure-mounted base-plate-less power module for application in a continuous high temperature (150°C) ambient. The thermal resistance of potential thermal interface materials (TIMs) has been measured as a function of contact pressure and applied power…
Abstract The fullerene‐mixed peroxide C60(O)(OOt‐Bu)6 was found to react with FeCl3 to form open‐cage compounds C60(O)4(OOt‐Bu)4 2 and C60(O)2(OH)(OOt‐Bu)5 3. Addition of hydroxyl amine to 3 closes the opening, yielding compound 5 with a hemiacetal and hemiaminal moiety. Oxidation of 5 with diacetoxyliodobenzene elimi…
In this paper, we investigate the adsorption mechanisms at the interface between carbon nanotubes and metal electrodes that can influence the Schottky barrier (SB). We developed a theoretical model based on the first-principles density functional theory for the interaction of an armchair single-wall carbon nanotube (S…
Article Crystal structure of (2,2'-bipyridine)-(adamantane-1,3-dicarboxylato)- manganese(II) hydrate, Mn(C10H8N2)(C12H14O4) · H2O was published on September 1, 2010 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 225, issue 3).
One of the major drawbacks in the typical design flow of electronic equipment is the lack of synchronization between design stages. Schematic design and thermal management are rarely correlated, although electrical and thermal parameters are very closely linked. Poor thermal design can have severe consequences on the…
In this paper, two topologies of PM motors are studied and optimized to be suitable for direct drive propulsion of electric vehicle. Flux weakening strategy is used and optimal parameters of the motors are defined. The design of the machines is focused the quality of back EMF waveforms and external parameters. The fir…
A characterization of ferrite transformers based on S-parameters measurement using vector network analyzer and specially developed PCB test fixture is presented. Ferrite transformers are realized with commercially available ferrite component. In addition, in order to verify the measurement procedure, we have tested th…
High quality Al and Ga-codoped ZnO (AGZO) thin films were successfully deposited both on sapphire substrates and GaN-based light emitting diodes (LED) with a tunnel junction (TJ) layer by using the radio frequency magnetron sputtering technique at room temperature. The AGZO thin films grown on sapphire substrate showe…
Using the dynamical Monte Carlo method we investigate the nonequilibrium effects in RKKY-coupling disordered spin glass. By the simulation we reproduce the well-known aging and memory phenomena and find the energy relaxation at a certain temperature happens only to the corresponding spins, which directly causes the no…
A study is reported of the low-temperature electrophysical (including superconducting) characteristics of the (Pb0.5Sn0.5)1 − x In x Te semiconducting solid solutions with an indium content variable within x = 0.05–0.20. A decrease in the impurity content x in the material has been found to bring about a decrease in t…