Ponencias 2014http://hdl.handle.net/11086/216112024-03-28T14:18:19Z2024-03-28T14:18:19ZStructural and magnetic changes induced by electron and ion irradiation on HOPGÁvila, MilagrosVenosta, Lisandro FranciscoBajales Luna, NoeliaBercoff, Paula Gabrielahttp://hdl.handle.net/11086/202962022-10-13T11:05:45Z2015-01-01T00:00:00ZStructural and magnetic changes induced by electron and ion irradiation on HOPG
Ávila, Milagros; Venosta, Lisandro Francisco; Bajales Luna, Noelia; Bercoff, Paula Gabriela
In recent decades, many studies reported magnetism in carbon-based materials. This phenomenon was attributed to structural defects within the sample. Many authors showed an increase of magnetization in HOPG (Highly Oriented Pyrolytic Graphite)induced by proton bombardment, meanwhile the effect of electronic irradiation on the magnetic behavior has been unattended till now. The aim of this work is to contribute to the understanding of defect-induced effects on the structural and magnetic properties of graphite. For this purpose, we performed experiments of irradiation on HOPG with two different impingingprojectilHV íelectrons and ions. The structural characterization of the bombarded samples was carried out by Raman spectroscopy. On both irradiated samples we identify the D band, associated to the disorder induced by bombardment, with significantly distinct contributions depending on the projectile type. In order to interpret Raman results, a theoretical model proposed by Ferrari et al. was used to classify the generated defects. The relationship between the induced damage andmagnetization was evaluated by magnetic characterization measurements with a SQUID (Superconducting Quantum Interference Device). Our results suggest that electron bombardment produces a higher change in the magnetic order compared to the magnetization induced by ion bombardment.
Ponencia presentada en el ScienceDirect International Congress of Science and Technology of Metallurgy and Materials, SAM – CONAMET 2014
2015-01-01T00:00:00ZAverages associated to the energy momentum tensor and study of a two scale system in general relativityBoero, Ezequiel FernandoMoreschi, Osvaldo Mariohttp://hdl.handle.net/11086/192022022-10-13T11:04:55Z2014-01-01T00:00:00ZAverages associated to the energy momentum tensor and study of a two scale system in general relativity
Boero, Ezequiel Fernando; Moreschi, Osvaldo Mario
We present a brief study of compound systems of dierent It is shown that the detailed dynamical studies of massless and massive particles can hardly be associated to standard averaging techniques.
Ponencia presentada en la 2nd Argentinian-Brazilian Meeting on Gravitation, Relativistic Astrophysics and Cosmology (GRACo II). Buenos Aires, Argentina, April 22-25, 2014.; Parece haber un error de impresión en el pdf adjunto en cuanto a que aparece un autor más que en la ponencia publicada http://www.astronomiaargentina.org.ar/uploads/docs/graco2_proceedings.pdf
2014-01-01T00:00:00ZNew geometries for the characterization of dark matter phenomenaMoreschi, Osvaldo MarioBoero, Ezequiel FernandoGallo, Emanuelhttp://hdl.handle.net/11086/192002022-10-13T11:05:33Z2014-01-01T00:00:00ZNew geometries for the characterization of dark matter phenomena
Moreschi, Osvaldo Mario; Boero, Ezequiel Fernando; Gallo, Emanuel
We present some new geometries with spheroidal symmetry, with and without mass, that involve new kind of energy momentum tensors, and which are suitable for the description of dark matter phenomena.
Ponencia presentada en la 2nd Argentinian-Brazilian Meeting on Gravitation, Relativistic Astrophysics and Cosmology (GRACo II). Buenos Aires, Argentina, April 22-25, 2014.
2014-01-01T00:00:00ZA multimodal corpus of rapid dialogue gamesPaetzel, MaikeRacca, David NicolásDe Vault, Davidhttp://hdl.handle.net/11086/190052022-10-13T11:05:35Z2014-01-01T00:00:00ZA multimodal corpus of rapid dialogue games
Paetzel, Maike; Racca, David Nicolás; De Vault, David
This paper presents a multimodal corpus of spoken human-human dialogues collected as participants played a series of Rapid DialogueGames (RDGs). The corpus consists of a collection of about 11 hours of spoken audio, video, and Microsoft Kinect data taken from 384game interactions (dialogues). The games used for collecting the corpus required participants to give verbal descriptions of linguisticexpressions or visual images and were specifically designed to engage players in a fast-paced conversation under time pressure. As aresult, the corpus contains many examples of participants attempting to communicate quickly in specific game situations, and it alsoincludes a variety of spontaneous conversational phenomena such as hesitations, filled pauses, overlapping speech, and low-latencyresponses. The corpus has been created to facilitate research in incremental speech processing for spoken dialogue systems. Potentially,the corpus could be used in several areas of speech and language research, including speech recognition, natural language understanding,natural language generation, and dialogue management.
Ponencia presentada en la Ninth International Conference on Language Resources and Evaluation (LREC'14)
2014-01-01T00:00:00Z