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Your search keyword '"Heredia, J.A."' showing total 2 results
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2 results on '"Heredia, J.A."'

1. Voice compression using discrete cosine transform and wavelet transform

Author

Suarez E.G., Diaz B.Z., Nino E.D.V., Rolon-Heredia J.A., Garrido Arévalo, Víctor Manuel, Marulanda J., Suarez E.G., Diaz B.Z., Nino E.D.V., Rolon-Heredia J.A., Garrido Arévalo, Víctor Manuel, and Marulanda J.

Abstract

Compressing information, such as voice, allows freeing up memory space, better utilizing bandwidth, in other words taking advantage of resources more efficiently in a time where technologies such as Voice over Internet Protocol are booming and the demand for information it requires higher speeds and quality. Therefore, this paper presents the acquisition and digital processing of voice signals, as well as the application of the discrete cosine transform and the wavelet transform using Matlab software version 2017b, licensed by the Technological University of Bolivar. Likewise, a criterion is established in order to eliminate little relevant information without affecting the quality of the output signal for which indicators such as the signal to noise ratio and the mean square error are calculated. © Published under licence by IOP Publishing Ltd.

Published
2019

2. Detailed $\alpha$-decay study of $^{180}\mathrm{Tl}$

Author

Andel, B., Andreyev, A.N., Antalic, S., Barzakh, A., Bree, N., Cocolios, T.E., Comas, V.F., Diriken, J., Elseviers, J., Fedorov, D.V., Fedosseev, V.N., Franchoo, S., Ghys, L., Heredia, J.A., Huyse, M., Ivanov, O., Köster, U., Liberati, V., Marsh, B.A., Nishio, K., Page, R.D., Patronis, N., Seliverstov, M.D., Tsekhanovich, I., Van Den Bergh, P., Van De Walle, J., Van Duppen, P., Venhart, M., Vermote, S., Veselský, M., Wagemans, C., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High Energy Physics::Experiment, Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; A detailed $\alpha$-decay spectroscopy study of $^{180}\mathrm{Tl}$ has been performed at ISOLDE (CERN). $Z$-selective ionization by the Resonance Ionization Laser Ion Source (RILIS) coupled to mass separation provided a high-purity beam of $^{180}\mathrm{Tl}$. Fine-structure $\alpha$ decays to excited levels in the daughter $^{176}\mathrm{Au}$ were identified and an $\alpha$-decay scheme of $^{180}\mathrm{Tl}$ was constructed based on an analysis of $\alpha$-$\gamma$ and $\alpha$-$\gamma$-$\gamma$ coincidences. Multipolarities of several $\gamma$-ray transitions deexciting levels in $^{176}\mathrm{Au}$ were determined. Based on the analysis of reduced $\alpha$-decay widths, it was found that all $\alpha$ decays are hindered, which signifies a change of configuration between the parent and all daughter states.

Published
2017
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