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Your search keyword '"Del Vento, Davide"' showing total 14 results
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14 results on '"Del Vento, Davide"'

1. AITuning: Machine Learning-based Tuning Tool for Run-Time Communication Libraries

Author

Fanfarillo, Alessandro and Del Vento, Davide

Subjects
Computer Science - Machine Learning, Computer Science - Performance, Statistics - Machine Learning
Abstract

In this work, we address the problem of tuning communication libraries by using a deep reinforcement learning approach. Reinforcement learning is a machine learning technique incredibly effective in solving game-like situations. In fact, tuning a set of parameters in a communication library in order to get better performance in a parallel application can be expressed as a game: Find the right combination/path that provides the best reward. Even though AITuning has been designed to be utilized with different run-time libraries, we focused this work on applying it to the OpenCoarrays run-time communication library, built on top of MPI-3. This work not only shows the potential of using a reinforcement learning algorithm for tuning communication libraries, but also demonstrates how the MPI Tool Information Interface, introduced by the MPI-3 standard, can be used effectively by run-time libraries to improve the performance without human intervention., Comment: 11 pages, 1 figure, ParCo 19

Published
2019

2. Python bindings for libcloudph++

Author

Jarecka, Dorota, Arabas, Sylwester, and Del Vento, Davide

Subjects
Physics - Computational Physics, Computer Science - Mathematical Software, Physics - Atmospheric and Oceanic Physics
Abstract

This technical note introduces the Python bindings for libcloudph++. The libcloudph++ is a C++ library of algorithms for representing atmospheric cloud microphysics in numerical models. The bindings expose the complete functionality of the library to the Python users. The bindings are implemented using the Boost.Python C++ library and use NumPy arrays. This note includes listings with Python scripts exemplifying the use of selected library components. An example solution for using the Python bindings to access libcloudph++ from Fortran is presented.

Published
2015

7. A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express

Author

Drossart, P., Piccioni, G., Gerard, J. C., Lopez-Valverde, M. A., Sanchez-Lavega, A., Zasova, L., Hueso, R., Taylor, F. W., Bezard, B., Adriani, A., Angrilli, F., Arnold, G., Baines, K. H., Bellucci, G., Benkhoff, J., Bibring, J. P., Blanco, A., Blecka, M. I., Carlson, R. W., Coradini, A., Di Lellis, A., Encrenaz, T., Erard, S., Fonti, S., Formisano, V., Fouchet, T., Garcia, R., Haus, R., Helbert, J., Ignatiev, N. I., Irwin, P., Langevin, Y., Lebonnois, S., Luz, D., Marinangeli, L., Orofino, V., Rodin, A. V., Roos-Serote, M. C., Saggin, B., Stam, D. M., Titov, D., Visconti, G., Zambelli, M., Tsang, C., Ammannito, Eleonora, Barbis, Alessandra, Berlin, Rainer, Bettanini, Carlo, Boccaccini, Angelo, Bonnello, Guillaume, Bouye, Marc, Capaccioni, Fabrizio, Cardesin, Alejandro, Carraro, Francesco, Cherubini, Giovanni, Cosi, Massimo, Dami, Michele, De Nino, Maurizio, Del Vento, Davide, Di Giampietro, Marco, Donati, Alessandro, Dupuis, Olivier, Espinasse, Sylvie, Fabbri, Anna, Fave, Agnes, Ficai Veltroni, Iacopo, Filacchione, Gianrico, Garceran, Katia, Ghomchi, Yamina, Giustizi, Maurizio, Gondet, Brigitte, Hello, Yann, Henry, Florence, Hofer, Stefan, Huntzinger, Gerard, Kachlicki, Juergen, Knoll, Rene, Kouach, Driss, Mazzoni, Alessandro, Melchiorri, Riccardo, Mondello, Giuseppe, Monti, Francesco, Neumann, Christian, Nuccilli, Fabrizio, Parisot, Jerome, Pasqui, Claudio, Perferi, Stefano, Peter, Gisbert, Piacentino, Alain, Pompei, Carlo, Reess, Jean-Michel, Rivet, Jean-Pierre, Romano, Antonio, Russ, Natalie, Santoni, Massimo, Scarpelli, Adelmo, Semery, Alain, Soufflot, Alain, Stefanovitch, Douchane, Suetta, Enrico, Tarchi, Fabio, Tonetti, Nazzareno, Tosi, Federico, and Ulmer, Bernd

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): P. Drossart (corresponding author) [1]; G. Piccioni [2]; J. C. Gérard [4]; M. A. Lopez-Valverde [5]; A. Sanchez-Lavega [6]; L. Zasova [7]; R. Hueso [6]; F. W. Taylor [8]; [...]

Published
2007
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8. South-polar features on Venus similar to those near the north pole

Author

Piccioni, G., Drossart, P., Sanchez-Lavega, A., Hueso, R., Taylor, F. W., Wilson, C. F., Grassi, D., Zasova, L., Moriconi, M., Adriani, A., Lebonnois, S., Coradini, A., Bezard, B., Angrilli, F., Arnold, G., Baines, K. H., Bellucci, G., Benkhoff, J., Bibring, J. P., Blanco, A., Blecka, M. I., Carlson, R. W., Di Lellis, A., Encrenaz, T., Erard, S., Fonti, S., Formisano, V., Fouchet, T., Garcia, R., Haus, R., Helbert, J., Ignatiev, N. I., Irwin, P. G. J., Langevin, Y., Lopez-Valverde, M. A., Luz, D., Marinangeli, L., Orofino, V., Rodin, A. V., Roos-Serote, M. C., Saggin, B., Stam, D. M., Titov, D., Visconti, G., Zambelli, M., Ammannito, Eleonora, Barbis, Alessandra, Berlin, Rainer, Bettanini, Carlo, Boccaccini, Angelo, Bonnello, Guillaume, Bouye, Marc, Capaccioni, Fabrizio, Cardesin Moinelo, Alejandro, Carraro, Francesco, Cherubini, Giovanni, Cosi, Massimo, Dami, Michele, De Nino, Maurizio, Del Vento, Davide, Di Giampietro, Marco, Donati, Alessandro, Dupuis, Olivier, Espinasse, Sylvie, Fabbri, Anna, Fave, Agnes, Veltroni, Iacopo Ficai, Filacchione, Gianrico, Garceran, Katia, Ghomchi, Yamina, Giustini, Maurizio, Gondet, Brigitte, Hello, Yann, Henry, Florence, Hofer, Stefan, Huntzinger, Gerard, Kachlicki, Juergen, Knoll, Rene, Driss, Kouach, Mazzoni, Alessandro, Melchiorri, Riccardo, Mondello, Giuseppe, Monti, Francesco, Neumann, Christian, Nuccilli, Fabrizio, Parisot, Jerome, Pasqui, Claudio, Perferi, Stefano, Peter, Gisbert, Piacentino, Alain, Pompei, Carlo, Reess, Jean-Michel, Rivet, Jean-Pierre, Romano, Antonio, Russ, Natalie, Santoni, Massimo, Scarpelli, Adelmo, Semery, Alain, Soufflot, Alain, Stefanovitch, Douchane, Suetta, Enrico, Tarchi, Fabio, Tonetti, Nazzareno, Tosi, Federico, and Ulmer, Bernd

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): G. Piccioni (corresponding author) [1]; P. Drossart [4]; A. Sanchez-Lavega [5]; R. Hueso [5]; F. W. Taylor [6]; C. F. Wilson [6]; D. Grassi [4]; L. Zasova [7]; M. [...]

Published
2007
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9. South polar features on Venus similar to those near the north pole

Author

Piccioni, Giuseppe, Drossart, Pierre, Sanchez-Lavega, A., Hueso, R., Taylor, F. W., Wilson, C. F., Grassi, D., Zasova, L., Moriconi, M., Adriani, A., Lebonnois, Sébastien, Coradini, A., Bézard, B., Angrilli, F., Virtis Venus Express, T., Arnold, G., Baines, K. H., Bellucci, G., Benkhoff, J., Bibring, J. P., Blecka, M. I., Blanco, A., Carlson, R. W., Di Lellis, A., Encrenaz, T., Erard, S., Fonti, S., Formisano, V., Fouchet, T., Garcia, R., Haus, R., Helbert, J., Ignatiev, N. I., Irwin, P. G. J., Langevin, Y., Lopez-Valverde, M. A., Luz, D., Marinangeli, L., Rodin, A. V., Orofino, V., Roos-Serote, M. C., Saggin, B., Stam, D. M., Titov, D., Visconti, G., Zambelli, M., Ammannito, Eleonora, Barbis, Alessandra, Berlin, Rainer, Luiz, D., Bettanini, Carlo, Boccaccini, Angelo, Bonnello, Guillaume, Bouye, Marc, Capaccioni, Fabrizio, Cardesin Moinelo, Alejandro, Carraro, Francesco, Cherubini, Giovanni, Cosi, Massimo, Dami, Michele, De Nino, Maurizio, Del Vento, Davide, Di Giampietro, Marco, Donati, Alessandro, Dupuis, Olivier, Espinasse, Sylvie, Fabbri, Anna, Veltroni, Iacopo Ficai, Fave, Agnes, Filacchione, Gianrico, Garceran, Katia, Ghomchi, Yamina, Giustini, Maurizio, Gondet, Brigitte, Hello, Yann, Henry, Florence, Hofer, Stefan, Huntzinger, Gerard, Kachlicki, Juergen, Knoll, René, Driss, Kouach, Mazzoni, Alessandro, Melchiorri, Riccardo, Mondello, Giuseppe, Monti, Francesco, Neumann, Christian, Nuccilli, Fabrizio, Parisot, Jerome, Pompei, Carlo, Pasqui, Claudio, Reess, Jean-Michel, Perferi, Stefano, Rivet, Jean-Pierre, Peter, Gisbert, Romano, Antonio, Piacentino, Alain, Russ, Natalie, Santoni, Massimo, Scarpelli, Adelmo, Semery, Alain, Soufflot, Alain, Stefanovitch, Douchane, Suetta, Enrico, Tarchi, Fabio, Tonetti, Nazzareno, Tosi, Federico, Be' Zard, B., Ulmer, Bernd, and A.-L., Et

Subjects
Physics::Atmospheric and Oceanic Physics, Astrophysics::Galaxy Astrophysics
Abstract

Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright 'dipole' feature surrounded by a cold 'collar' at its north pole (1–4). The polar dipole is a 'double-eye' feature at the centre of a vast vortex that rotates around the pole, and is possibly associated with rapid downwelling. The polar cold collar is a wide, shallow river of cold air that circulates around the polar vortex. One outstanding question has been whether the global circulation was symmetric, such that a dipole feature existed at the south pole. Here we report observations of Venus' south-polar region, where we have seen clouds with morphology much like those around the north pole, but rotating somewhat faster than the northern dipole. The vortex may extend down to the lower cloud layers that lie at about 50km height and perhaps deeper. The spectroscopic properties of the clouds around the south pole are compatible with a sulphuric acid composition.

Published
2007

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