Materials Literature
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As the population of transformers in service increases and becomes older, more attentions are focused on their availability and reliability. Through decades' progress, it is undeniable that considerable advances have been achieved on the techniques of fault diagnosis and condition assessment for oil-immersed transform…
Bis-phenylamides and bis-hydroxyindolamides of diethylenetriaminepentaacetic acid-gadolinium (DTPA(Gd)) are paramagnetic reducing substrates of peroxidases that enable molecular imaging of peroxidase activity in vivo. Specifically, gadolinium chelates of bis-5-hydroxytryptamide-DTPA (bis-5HT-DTPA(Gd)) have been used t…
The anti-angiogenic, carboxy terminal non-collagenous domain (NC1) derived from human Collagen type IV alpha 6 chain, [α6(IV)NC1] or hexastatin, was earlier obtained using different recombinant methods of expression in bacterial systems. However, the effect of L-arginine mediated renaturation in enhancing the relative…
In recent years, 380Vdc distribution systems have been expected to be one of the energy saving solutions for telecommunication buildings and data centers. However, DC distribution systems have various problems. In this paper, We report the results of an investigation of inrush current, including current size, effects…
We present statistical data on the risetime of lightning current pulses in negative upward flashes measured on the Säntis tower in 2010 and 2011. Two different definitions were used to determine the current risetime. The first is the t10-90rise time usually adopted in lightning applications and lightning standards. Th…
This paper investigates the influence of inclined lightning channel on induced voltage on the line. The angle variations of inclined lightning channel may cause the voltage to be induced at different values for different points along the power line. This behaviour may affect the line's lightning performance if the pea…
The winding hot spot temperature of the oil-immersed power transformer is an important parameter factor in the long-term life of the transformer. It has a great influence on the transformer insulation aging and a close relationship to the transformer top oil temperature which is used to indicate the operating conditio…
Optimum fertilization management is an important technique to alleviate the adverse effects of salinity stress on plants. A pot experiment was conducted to evaluate the ameliorative role of inorganic phosphorus (P) and organic P sources on wheat grown under salt stress in three soil types deficient in available P. Whe…
Nominally undoped, hydrothermally grown ZnO single crystals have been investigated before and after exposure to remote H-plasma. Defect characterization has been made by two complementary techniques of positron annihilation: positron lifetime spectroscopy and coincidence Doppler broadening. The high-momentum parts of…
The Stacked Switched Capacitor (SSC) energy buffer is a recently proposed architecture for buffering energy between single-phase ac and dc. When used with film capacitors, it can increase the life of grid-interfaced power converters by eliminating limited-life electrolytic capacitors while maintaining comparable energ…
Abstract Transformation of pigment assembly in photosynthetic supramolecules is an important event in the performance of efficient photosynthetic activities, and model systems mimicking such transformation are useful to elucidate dynamic processes in natural photosynthetic systems. In this paper, we report stimuli-ind…
Results of testing of a possible method for location of water microleakages in the cooling system of the first wall and vacuum chamber of ITER are presented. The method consists in spectroscopic detection of the emission lines of atoms and ions of the Xe additive dissolved in water. These lines are excited when the wa…
It has been found that CuInSe 2 chalcopyrite is an extrinsic semiconductor that exhibits a more complex temperature dependence of its electric conductivity than conventional extrinsic semiconductors. This temperature dependence of the electric conductivity results from the complex structure of the electron energy spec…
As part of the EMMAV research program the SMA technology was studied as well as its application as an actuator for electro-active morphing wings. As a first step a theoretical model of the applied SMAs, a structure of Titanium and Nickel, was developed in order to predict the behaviour over time and temperature when e…
PEM (Polymer electrolyte membrane) fuel cell systems are very efficient energy converters. They generate electrical power, low oxygen concentration cathode exhaust gas, water as well as heat. The fuel cell technology has become very attractive for the use on aircraft where it may serve as a replacement for the auxilia…
The synthetic method of nanosized hydroxyapatite Ca 5 (PO 4 ) 3 OH (∼80–100 nm) is optimized. The functional structure is analyzed in a wide temperature range using the combination of the high-temperature X-ray diffraction method, differential thermal analysis, and infrared spectroscopy. A novel method of obtaining hy…
Undoped hydrogenated microcrystalline Ge (µc-Ge:H) films grown by plasma-enhanced chemical vapor deposition reveal high concentration of free holes (>1018 cm-3) when the films exhibit a high crystalline volume fraction. ESR and Hall-effect experiments suggest that the acceptor states arise from the native dangling bon…
Precise transfer of pattern means guarantee in high repeatability and reliability, high throughput and low cost of ownership. By improving this resolution and alignment precision the minimum size can be further reduced to 1nm and beyond. The other important aspect of achieving minimum precised size is the photo resist…
CEA-Leti has developed a real-time reflection imaging system: it combines illumination by QCL sources and a telescope that focuses the reflected radiation onto a camera that houses an uncooled 320×240 antenna-coupled micro-bolometer array driven by a FPGA card. We present first high resolution images of illuminated su…
ATP-EMTP simulations are performed to estimate the minimum shielding failure current causing flashover in 150 kV and 400 kV double-circuit overhead lines of the Hellenic transmission system. This critical current is of great importance for estimating the shielding failure flashover rate and assessing the insulation co…