Sunday, February 22, 2015

 

 



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Olvidé mi contraseña

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Nomenclatura Unesco > (22) Física > (2203) Electrónica
(2203.01) Circuitos (2203.02) Elementos de circuitos
(2203.03) Válvulas electrónicas (2203.04) Microscopía electrónica
(2203.05) Estados electrónicos (2203.06) Transporte de electrones
(2203.07) Circuitos integrados (2203.08) Fotoelectricidad
(2203.09) Piezoelectricidad (2203.99) Otras (especificar)

Categorías relacionadas:
(3307) Tecnología electrónica

Mostrando recursos 1 - 20 de 255,731

1. Electronic sensor for pH measurements in nanoliters - Bouhadda, Ismaïl; De Sagazan, Olivier; Le Bihan, France
International audience

2. Electronic Sensor for Ph Measurements in nanoliters - Bouhadda, Ismaïl; De Sagazan, Olivier; Le Bihan, France
International audience

3. Interplay between structure and electronic properties of layered transition-metal dichalcogenides: Comparing the loss function of 1T and 2H polymorphs - Cudazzo, Pierluigi; Gatti, Matteo; Rubio, Angel
International audience

4. IR characterization of Ln2???xSrxCoO4 (x???1; Ln=La, Nd) oxides - Castro Garc??a, Socorro; S??nchez And??jar, Manuel; Rey Cabezudo, Carlos Jos??.; Se??ar??s Rodr??guez, Mar??a Antonia; Julien, C.
We have recorded the FTIR spectra of powder samples of Ln2???xSrxCoO4 (Ln=La, Nd) at room temperature. We have identified the infrared active modes (3A2u+4Eu), and analyzed how they change as a function of Ln and the Sr doping. We correlate the obtained results with structural data obtained from powder X-ray diffraction studies and with the electronic properties displayed by these samples.

5. Peculiarities in the electrical and magnetic properties of cobalt perovskites Ln1???xMxCoO3 (Ln3+: La3+, M2+: Ca2+, Sr2+, Ba2+; Ln3+: Nd3+, M2+: Sr2+) - Se??ar??s Rodr??guez, Mar??a Antonia; Breijo, M.P.; Castro Garc??a, Socorro; Rey Cabezudo, Carlos Jos??.; S??nchez, M.; S??nchez, R.D.; Mira P??rez, Jorge; Fondado Fondado, Alfonso; Rivas Rey, Jos??
We refer here to the electrical and magnetic properties of the Ln1???xMxCoO3 systems (Ln3+: La3+, M2+: Ca2+, Sr2+, Ba2+; Ln3+: Nd3+, M2+: Sr2+), paying special attention to those ferromagnetic compounds that display M???I transitions as temperature rises: La1???xMxCoO3 (M2+: Ca2+, Sr2+, Ba2+) in the compositional interval x=0.2???0.3, and Nd1???xSrxCoO3, with x=0.40. The magneto-transport properties of such materials are peculiar and interesting: they show diodic behavior and large relaxation effects ??? these latter being specially important in the Nd compound ??? they display magnetoresistive effects specially at the M???I transition temperatures, and they age with time. All these results are discussed...

6. Extremely Electron-Rich, Boron-Functionalized, Icosahedral Carborane-Based Phosphinoboranes - Spokoyny, Alexander M.; Lewis, Calvin D.; Teverovskiy, Georgiy; Buchwald, Stephen Leffler
We have prepared the first examples of B9-connected trivalent aryl and alkyl phosphinoborane species via Pd-catalyzed phosphination of 9-iodo-meta-carborane. Our studies highlight the unique electronic features of the B9-connected meta-carboranyl moiety as compared to its C1-based analogue. This work suggests that the B9-functionalized meta-carboranyl substituent in these ligands exhibits more electron-releasing character than any other known carbon-based substituent, ultimately laying the foundation for a new class of phosphine ligands with extremely electron-rich character.

7. Diseño y construcción de un robot submarino basado en Arduino - ARENAS MORENO, JULIO
Arenas Moreno, J. (2014). Diseño y construcción de un robot submarino basado en Arduino.

8. Sensor characterization for multisensor odor-discrimination system - CUETO BELCHÍ, ALEJANDRO DEL; Rothpfeffer, Niklas; Pelegrí Sebastiá, José; Chilo, José; GARCÍA RODRÍGUEZ, DANIEL; Sogorb Devesa, Tomás Carlos
In recent years, with the advent of new and cheaper sensors, the use of olfactory systems in homes, industries, and hospitals has a new start. Multisensor systems can improve the ability to distinguish between complex mixtures of volatile substances. To develop multisensor systems that are accurate and reliable, it is important to take into account the anomalies that may arise because of electronic instabilities, types of sensors, and air flow. In this approach, 32 metal oxide semiconductor sensors of 7 different types and operating at different temperatures have been used to develop a multisensor olfactory system. Each type of sensor...

9. Explorant noves propietats electroquímiques dels metal·lacarborans. estratègies per a l’heterofuncionalització i aplicacions en biologia molecular - Tarrés Schüler, Màrius
La recerca recollida en aquest manuscrit es centra en els metal·lacarborans cobalta i ferrabisdicarballur ([3,3’-Co(1,2-C2B9H11)2]-, [1]-; i [3,3’-Fe(1,2-C2B9H11)2]-, [2]-, respectivament), compostos aniònics i redox reversible, emprats com a punt de partida i objectiu final. El primer capítol de la Tesi es basa en la cerca d’una estratègia per funcionalitzar regioselectivament una plataforma simple amb diferents tipus de metal·lacarborans ([1]- i [2]-), amb bons rendiments i de fàcil purificació. Per assolir aquest objectiu, s’ha optat per una ruta sintètica neta, amb bons rendiments i eficient: la síntesi malònica i l’acetoacètica. Seguint aquest procediment, s’ha obtingut l’homo i heterosubstitució, obtenint per primera vegada...

10. Assesment of atmospheric phase screen impact on Geosynchronous SAR - Recchia, Andrea; Monti Guarnieri, Andrea; Broquetas Ibars, Antoni; Ruiz Rodon, Josep
The paper evaluates the effects of Atmospheric Phase Screen on focused Geosynchronous SAR data. We derive theoretical models for the resolution, the interferometric de-correlation and the induced clutter in presence of an APS, whose joint time and space power spectrum is modeled as an extension of the Kolmogorov power law. Finally we provide some statistics gathered from a GB RADAR experiment.

11. Low-level processing of PolSAR images with binary partition trees - Salembier Clairon, Philippe Jean; Foucher, Samuel; López Martínez, Carlos
This paper discusses the interest of Binary Partition Trees (BPTs) and the usefulness of graph cuts for low-level processing of PolSAR images. BPTs group pixels to form homogeneous regions, which are hierarchically structured by inclusion in a tree. They provide multiple resolutions of description and easy access to subsets of regions. Once constructed, BPTs can be used for many applications including filtering, segmentation, classification and object detection. Many processing strategies consist in populating the tree with a specific feature and in applying a graph-cut called pruning. Different graph-cuts are discussed and analyzed in the context of PolSAR images for speckle...

12. A simulator for GNSS-R polarimetric observations over the ocean - Schiavulli, Domenico; Ghavidel, Ali; Camps Carmona, Adriano José; Migliaccio, Muriccio
Global Navigation Satellite Systems - Reflec-tometry (GNSS-R) represents an innovative tool for remote sensing. In this paper a facet-based simulator is presented to investigate the polarimetric characteristics of GNSS L-band signals reflected off sea surface. The aim of the proposed technique is to improve the classical simulation technique based on the Zavorotny-Voronovich (Z-V) approach. Therefore, the scattered power and the Delay-Doppler Map are obtained using a time-evolving random 3D sea surface and the Kirchhoff Approximation (KA) of the Physical Optics (PO) to describe the scattering mechanisms. Finally the polarization ratio (PR) between co- and cross-polar scattered signal is fully investigated...

13. Residual calibration error impact on SMOS SLL performance - Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Durán Martínez, Israel; Lin, Wu; Duffo Ubeda, Núria; Martín Neira, Manuel
SMOS Side Lobe Level (SLL), which is caused by the limited coverage of the measured visibility samples in the frequency domain, is responsible for non-negligible radiometric errors at pixels placed close to large brightness temperature transitions (e.g. coastline, ice-sea border, RFI, sun reflection, etc.). In order to mitigate this effect the visibility samples are tapered by means of a Blackman window before the image inversion procedure is undertaken. However, the theoretical SLL performance of such a specific taper is degraded by residual visibility calibration errors. Simulations performed in this work show that SLL performance is very sensitive to calibration errors...

14. Simulador de sistemas GPRS para Telefónica : manual de usuario - Umbert Juliana, Anna; Casadevall Palacio, Fernando José
Manual d'usuari del simulador de sistemas GPRS dissenyat per nosaltres.

15. Simulador de sistemas GPRS para Telefónica : guía de los modelos de tráfico - Umbert Juliana, Anna; Casadevall Palacio, Fernando José
Descripció dels models de tràfic implementats al simulador.

16. Una experiencia de evaluación continuada en Radiación y Propagación - Torres Torres, Francisco; Fabregas Canovas, Francisco Javier; López Martínez, Carlos; Corbella Sanahuja, Ignasi
Postprint (author’s final draft)

17. THE MIP REPORT VOLUME 1 1994 MOTIVATIONAL SURVEY OF IT QUALITY PRACTITIONERS Written by - Richard Warden; Bsc Miqa; Isobel Nicholson Phd; Gl Na
translated, in any form, or by any means, electronic, mechanical, magnetic, optimal, chemical, manual or otherwise without the express permission in writing from the publisher.

18. Does religion promote trust? The role of signaling, reputation, and punishment - Richard Sosis; Richard Sosis
of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. The Interdisciplinary Journal of Research on Religion is freely available on the World Wide Web at

19. $rec.titulo - D. F. Brailsford
ments. It is another in my series of experiments to see how long it takes for me to re-build electronic ver-sions of my published early papers as properly re-typeset ‘PDF Normal ’ rather than just as a bitmap scan. This particular paper appeared in the Journal of Physics section D in 1970. To my surprise this paper has been scanned in by the Institute of Physics and has been converted to PDF in ‘Image plus Searchable Text’ format. It is available via

20. Dear Author:
The proof of your article, to be published in Neuroscience, is attached to this e-mail as a "PDF " file. You will find, in addition, a Query Form detailing any questions we have regarding your article (as a separate attachment). For helpful information on PDF files, please see the end of this e-mail. If, after reading this message, you would still prefer to receive your proofs by fax or mail, please inform us immediately by replying to this e-mail with full fax details. This PDF file has been produced automatically from an electronic database format; the original file is maintained...

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