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Atlanta, GA, United States

Assa B.,Smart Applications | Nechache R.,University of Rome Tor Vergata | Nechache R.,INRS - Institute National de la Recherche Scientifique | Therriault D.,Ecole Polytechnique de Montreal | And 2 more authors.
Applied Physics Letters | Year: 2011

We report on the electromagnetic (EM) properties in high-frequency domain (HF) of multiferroic Bi2FeCrO6 (BFCO) thin films. The films were epitaxially grown on SrTiO3 substrates by pulsed laser ablation. Typical 50 nm-thick BFCO films having both (111) and (001) orientations were investigated. The films exhibit systematically deep EM absorbance narrow bands, localized in the HF X-band domain, with an attenuation reaching as high as-24 dB. The magnitude and the shape of EM absorption depend on the crystal orientation of the film. BFCO thin films show a promising potential for microwave application as specific frequency bands notch filters. © 2011 American Institute of Physics. Source


Xue Y.,Siemens AG | Divya K.C.,Siemens AG | Griepentrog G.,Siemens AG | Liviu M.,Siemens AG | And 2 more authors.
IEEE Energy Conversion Congress and Exposition: Energy Conversion Innovation for a Clean Energy Future, ECCE 2011, Proceedings | Year: 2011

Solar energy is under push to reach "grid parity" without additional subsidies and favorable policies. While cost and reliability are major concerns for both photovoltaic (PV) panels and PV inverters, comparable or exceeded grid functions and power quality can further help solar power become competitive to conventional generation technologies in the wholesale electricity market. This paper gives an overview of future development trends of PV inverters and proposes new requirements for next generation PV inverters under smart grid and/or microgrid environments. Approaches to address these requirements are also discussed from the research methodology perspectives. The goal of this paper is to draw the interests of the industry and academia in the new technical challenges of next generation smart PV inverters in addition to the "dollar per watt" overall PV system cost target. © 2011 IEEE. Source


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Aissa B.,Smart Applications | Aissa B.,INRS - Institute National de la Recherche Scientifique | Hena-Zamal H.,INRS - Institute National de la Recherche Scientifique | Asgar-Khan M.,Concordia University at Montreal | And 3 more authors.
Materials Science and Technology Conference and Exhibition 2013, MS and T 2013 | Year: 2014

Self healing nanocomposites consisting of blend of single-walled carbon nanotubes (SWNT) materials and 5-Ethylidene-2-norbornene (5E2N) monomer were fabricated and organized into 3D structures beams by means of the micro-vascular network infiltration based on the UV assisted direct-write assembly technology. The kinetic of the 5E2N-Ring Opening Metathesis Polymerization (ROMP) was studied both as a function of the temperature domain and the Grubbs catalyst to the 5E2N monomer ratio and demonstrated that the ROMP reaction still effective in a large temperature domain (-15 to 40°C) with an excellent percent of monomer conversion (> 90%) happening in very short time. The nano-indentation analyses have shown a clear increase in the stiffness-with respect to the SWNT loads. This approach demonstrated here opens new prospects for space-device assembly and the using carbon nanotube/healing agent nanocomposites materials for self-repair functionality. Copyright © 2013 MS&T'13®. Source

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