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Affichage de 7071 à 7080 sur 16288

Article dans une revue

Competing Activities in Social Networks

Mohamed Moez Belhaj, Frédéric Deroïan

We consider a society in which each agent has one unit of a resource to allocate between two activities. Agents are organized in a social network, and each activity generates complementarities between neighbors. We find multiplicity of equilibrium for high intensity of interaction, and we…

The B.E. journal of economic analysis & policy, 2014, 14 (4), pp.36. ⟨10.1515/bejeap-2013-0121⟩. ⟨hal-01463098⟩

Article dans une revue

Interferometric technique for scanning near-field microwave microscopy applications

Hind Bakli, Kamel Haddadi, Tuami Lasri

An interferometric technique for scanning near-field microscopy applications is proposed. The method is based on the association of a vector network analyzer, an evanescent microwave coaxial probe and a precise interferometer built up with a power divider, a phase-shifter, and an attenuator.…

IEEE Transactions on Instrumentation and Measurement, 2014, 63, pp.1281-1286. ⟨10.1109/TIM.2013.2296416⟩. ⟨hal-00980043⟩

Article dans une revue

Optical properties of gallium nitride heterostructures grown on silicon for waveguiding application

Irma Saraswati, Arnaud Stolz, S. Ko, El Hadj Dogheche, Nji Raden Poespawati, Retno Wigajatri, Didier Decoster

Gallium nitride (GaN) on silicon (Si) is governed by the possibility to use this family of semiconductor for novel optoelectronic devices. GaN layers are deposited by MOCVD on silicon Si (111) using AlGaN buffer layer. We have studied the microstructure quality of the films. From SEM, TEM and AFM…

Advanced Materials Research, 2014, 980, pp.41-45. ⟨10.4028/www.scientific.net/AMR.980.41⟩. ⟨hal-01020484⟩

Communication dans un congrès

Phononic crystals patterning by e-beam lithography "dots on the fly" methodology for integration into thermoelectric energy converters

Valeria Lacatena, Maciej Haras, J.F. Robillard, Stéphane Monfray, Thomas Skotnicki, Emmanuel Dubois

A phononic engineered pattern is conceptualized and realized to hinder the phonons propagation and reduce the lattice thermal conductivity. The pattern fabrication methodology is shown and the procedure of integration on suspended membrane for thermal conductivity characterization is depicted. The…

17èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2014, 2014, Villeneuve d'Ascq, France. 3 p. ⟨hal-01020281⟩

Communication dans un congrès

Broadband sound shielding of Lamb waves through a periodic array of junctions

R.P. Moiseyenko, Yan Pennec, R. Marchal, B. Bonello, Bahram Djafari-Rouhani

We study theoretically sub-wavelength physical phenomena such as resonant transmission and broadband sound shielding for Lamb waves propagating in an acoustic metamaterial made of a thin plate drilled with one or two row(s) of rectangular holes. One of the main results is the demonstration of a…

2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2014, Aug 2014, Copenhagen, Denmark. pp.100-102, ⟨10.1109/MetaMaterials.2014.6948609⟩. ⟨hal-03508189⟩

Communication dans un congrès

Experimental investigation of the characteristics of the electromagnetic reverberation in the UWB bands

Aliou Bamba, Wout Joseph, Emmeric Tanghe, Luc Martens, Davy Gaillot, M. Lienard, Jose-Maria Molina-Garcia-Pardo, Maria-Teresa Martinez-Ingles

The electromagnetic reverberation time characteristics are investigated at UltraWide Band (UWB) frequencies, i.e., from 2 to 10 GHz. The reverberation time is bandwidth independent and decreases as the frequency increases. Besides, the reverberation ratio - the contribution of the diffuse fields in…

2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2014, Jul 2014, Memphis, TN, United States. pp.1181-1182, ⟨10.1109/APS.2014.6904917⟩. ⟨hal-03346231⟩

Article dans une revue

Longitudinal and transversal polarization switching in strained ferroelectrics

Laurent Baudry, Igor A. Luk'Yanchuk, A. Razumnaya

Using the multicomponent Landau-Devonshire functional we study the field-induced polarization switching in c-oriented ferroelectric phase of epitaxial perovskite film and found that two different regimes are possible: (i) longitudinal switching with change of the polarization modulus and (ii)…

Ferroelectrics, 2014, 13th International Meeting on Ferroelectricity, 461 (1), pp.22-28. ⟨10.1080/00150193.2014.889528⟩. ⟨hal-01044688⟩

Communication dans un congrès

Electrical characterization of semiconductor nanowires by scanning tunneling microscopy

Corentin Durand, Pierre Capiod, Maxime Berthe, Tao Xu, Jean-Philippe Nys, Renaud Leturcq, Philippe Caroff, B. Grandidier

In order to understand the structural and electronic properties of semiconductor nanowires, scanning tunneling microscopy is an appealing technique that can supplement transmission electron microscopies and conventional electrical characterization techniques. It is able to probe the surface of…

SPIE Photonics West, OPTO, Conference 8996 - Quantum Dots and Nanostructures : Synthesis, Characterization, and Modeling XI, 2014, San Francisco, CA, United States. 89960E, 10 p., ⟨10.1117/12.2042767⟩. ⟨hal-00974539⟩

Communication dans un congrès

Multiuser phase coded costas signals with improved cross-correlation and partial cross-ambiguity properties

Nadjah Touati, Charles Tatkeu, Atika Rivenq, Thierry Chonavel

Costas codes are a variant of frequency hopping codes that achieve the «thumbtack» auto-ambiguity function needed in radar applications. However, they may show poor cross- ambiguity properties when selected and assigned randomly which makes them poorly adapted to multiuser radar applications. In…

RADAR 2014, International Radar Conference, Oct 2014, Lille, France. 6p, ⟨10.1109/RADAR.2014.7060452⟩. ⟨hal-01213623⟩

Communication dans un congrès

Synthesis and characterization of BNT thin films

Sara Abou Dargham, Jihane Jabbour, Youssef Zaatar, Jamal Assaad, Antonio Khoury, Denis Remiens, Doumit Zaouk

Polycrystalline piezoelectric lead-free Bi0.5Na0.5TiO3 (abbreviated as BNT) thin films were deposited on glass substrates by an optimized Sol-Gel process using the Electrospray technique. X-ray Diffraction (XRD) analysis showed that after heating the films at 650˚C for 1 hour, dense and well…

Lebanese Association for the Advancement of Science 20th International Science Conference, LAAS 20, 2014, Hadath, Lebanon. Session : Theoretical and Experimental Chemistry and Physics III, 474-475. ⟨hal-00974478⟩