Browsing by Author "Cifuentes, A."

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    A general framework to study the price-color relationship in paintings with an application to Mark Rothko rectangular series
    (2021) Charlin, Ventura; Cifuentes, A.
    We propose a general framework to study the relationship between the price of a painting and its color-related attributes. To this end we focus on four key aspects: dominant colors, features of the color palette, color harmony, and color emotions. We demonstrate the usefulness of this approach with an example based on Mark Rothko's post-1950 paintings (the “rectangular” series), and auction data from the 1994 to 2018 period. We identify two distinct price-color regimes in Rothko's market: (a) [1994-2005], a period in which prices are explained mainly by the growing popularity of the artist regardless of the color attributes of the paintings sold; and (b) [2006-2018], a period in which color-related attributes explain most of the prices. Furthermore, we find that in this second period, the dominant colors and the diversity of the color palette, are by far the most relevant attributes that influence the price; color harmony and color emotions hold almost no explanatory power during this period. Finally, we propose a new metric based on the Herfindahl Index to describe color diversity; this metric seems to be promising at characterizing the effect of the color palette on the price of a painting.
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    Dark matter line searches with the Cherenkov Telescope Array
    (2024) Abe, S.; Abhir, J.; Abhishek, A.; Acero, F.; Acharyya, A.; Adam, R.; Aguasca-Cabot, A.; Agudo, I.; Aguirre-Santaella, A.; Alfaro, J.; Alfaro, R.; Alvarez-Crespo, N.; Alves Batista, R.; Amans, J. -P.; Amato, E.; Ambrosi, G.; Angel, L.; Aramo, C.; Arcaro, C.; Arnesen, T. T. H.; Arrabito, L.; Asano, K.; Ascasibar, Y.; Aschersleben, J.; Ashkar, H.; Backes, M.; Baktash, A.; Balazs, C.; Balbo, M.; Baquero Larriva, A.; Martins, V. Barbosa; Barres de Almeida, U.; Barrio, J. A.; Batkovic, I.; Batzofin, R.; Baxter, J.; Becerra Gonzalez, J.; Beck, G.; Benbow, W.; Berge, D.; Bernardini, E.; Bernete, J.; Bernloehr, K.; Berti, A.; Bertucci, B.; Bhattacharjee, P.; Bhattacharyya, S.; Bigongiari, C.; Biland, A.; Bissaldi, E.; Biteau, J.; Blanch, O.; Blazek, J.; Bocchino, F.; Boisson, C.; Bolmont, J.; Bonnoli, G.; Bonollo, A.; Bordas, P.; Bosnjak, Z.; Bottacini, E.; Bottcher, M.; Bringmann, T.; Bronzini, E.; Brose, R.; Brown, A. M.; Brunelli, G.; Bulgarelli, A.; Bulik, T.; Burelli, I.; Burmistrov, L.; Burton, M.; Buscemi, M.; Bylund, T.; Cailleux, J.; Campoy-Ordaz, A.; Cantlay, B. K.; Capasso, G.; Caproni, A.; Capuzzo-Dolcetta, R.; Caraveo, P.; Caroff, S.; Carosi, A.; Carosi, R.; Carquin, E.; Carrasco, M. -S.; Cassol, F.; Castaldini, L.; Castrejon, N.; Castro-Tirado, A. J.; Cerasole, D.; Cerruti, M.; Chadwick, P. M.; Chaty, S.; Chen, A. W.; Chernyakova, M.; Chiavassa, A.; Chudoba, J.; Chytka, L.; Cicciari, G. M.; Cifuentes, A.; Coimbra Araujo, C. H.; Colapietro, M.; Conforti, V.; Conte, F.; Contreras, J. L.; Costa, A.; Costantini, H.; Cotter, G.; Cristofari, P.; Cuevas, O.; Curtis-Ginsberg, Z.; D'Amico, G.; D'Ammando, F.; Dai, S.; Dalchenko, M.; Dazzi, F.; De Angelis, A.; de Lavergne, M. de Bony; De Caprio, V.; de Gouveia Dal Pino, E. M.; De Lotto, B.; De Lucia, M.; de Menezes, R.; de Naurois, M.; de Souza, V.; del Peral, L.; del Valle, M. V.; Delgado Giler, A. G.; Delgado Mengual, J.; Delgado, C.; Dell'aiera, M.; della Volpe, D.; Depaoli, D.; Di Girolamo, T.; Di Piano, A.; Di Pierro, F.; Di Tria, R.; Di Venere, L.; Diaz, C.; Diebold, S.; Dinesh, A.; Djuvsland, J.; Dominik, R. M.; Prester, D. Dominis; Donini, A.; Dorner, D.; Doerner, J.; Doro, M.; Dournaux, J. -L.; Duangchan, C.; Dubos, C.; Ducci, L.; Dwarkadas, V. V.; Ebr, J.; Eckner, C.; Egberts, K.; Einecke, S.; Elsaesser, D.; Emery, G.; Errando, M.; Escanuela, C.; Escarate, P.; Godoy, M. Escobar; Escudero, J.; Esposito, P.; Ettori, S.; Falceta-Goncalves, D.; Fedorova, E.; Fegan, S.; Feng, Q.; Ferrand, G.; Ferrarotto, F.; Fiandrini, E.; Fiasson, A.; Filipovic, M.; Fioretti, V.; Fiori, M.; Foffano, L.; Font Guiteras, L.; Fontaine, G.; Froese, S.; Fukazawa, Y.; Fukui, Y.; Furniss, A.; Galanti, G.; Galaz, G.; Galelli, C.; Gallozzi, S.; Gammaldi, V.; Garczarczyk, M.; Gasbarra, C.; Gasparrini, D.; Ghalumyan, A.; Gianotti, F.; Giarrusso, M.; Giesbrecht Formiga Paiva, J. G.; Giglietto, N.; Giordano, F.; Giuffrida, R.; Glicenstein, J. -F.; Glombitza, J.; Goldoni, P.; Gonzalez, J. M.; Gonzalez, M. M.; Goulart Coelho, J.; Gradetzke, T.; Granot, J.; Grasso, D.; Grau, R.; Greaux, L.; Green, D.; Green, J. G.; Grolleron, G.; Guedes, L. M. V.; Gueta, O.; Hackfeld, J.; Hadasch, D.; Hamal, P.; Hanlon, W.; Hara, S.; Harvey, V. M.; Hassan, T.; Hayashi, K.; Hess, B.; Heckmann, L.; Heller, M.; Hernandez Cadena, S.; Hervet, O.; Hinton, J.; Hiroshima, N.; Hnatyk, B.; Hnatyk, R.; Hofmann, W.; Holder, J.; Horan, D.; Horvath, P.; Hovatta, T.; Hrabovsky, M.; Hrupec, D.; Iarlori, M.; Inada, T.; Incardona, F.; Inoue, S.; Inoue, Y.; Iocco, F.; Iori, M.; Ishio, K.; Jamrozy, M.; Janecek, P.; Jankowsky, F.; Jean, P.; Jimenez Quiles, J.; Jin, W.; Juramy-Gilles, C.; Jurysek, J.; Kagaya, M.; Kalekin, O.; Karas, V.; Katagiri, H.; Kataoka, J.; Kaufmann, S.; Kazanas, D.; Kerszberg, D.; Kieda, D. B.; Kleiner, T.; Kluge, G.; Kobayashi, Y.; Kohri, K.; Komin, N.; Kornecki, P.; Kosack, K.; Kowal, G.; Kubo, H.; Kushida, J.; La Barbera, A.; La Palombara, N.; Lainez, M.; Lamastra, A.; Lapington, J.; Laporte, P.; Lazarevic, S.; Lazendic-Galloway, J.; Lemoine-Goumard, M.; Lenain, J. -P.; Leone, F.; Leonora, E.; Leto, G.; Lindfors, E.; Linhoff, M.; Liodakis, I.; Lipniacka, A.; Lombardi, S.; Longo, F.; Lopez-Coto, R.; Lopez-Moya, M.; Lopez-Oramas, A.; Loporchio, S.; Lozano Bahilo, J.; Luque-Escamilla, P. L.; Macias, O.; Majumdar, P.; Mallamaci, M.; Malyshev, D.; Mandat, D.; Manico, G.; Mariotti, M.; Marquez, I.; Marquez, P.; Marsella, G.; Marti, J.; Martinez, G. A.; Martinez, M.; Martinez, O.; Marty, C.; Mas-Aguilar, A.; Mastropietro, M.; Mazin, D.; Menchiari, S.; Mestre, E.; Meunier, J. -L.; Meyer, D. M. -A.; Meyer, M.; Miceli, D.; Miceli, M.; Michailidis, M.; Michalowski, J.; Miener, T.; Miranda, J. M.; Mitchell, A.; Mizote, M.; Mizuno, T.; Moderski, R.; Molero, M.; Molfese, C.; Molina, E.; Montaruli, T.; Moralejo, A.; Morcuende, D.; Morselli, A.; Moulin, E.; Moya Zamanillo, V.; Munari, K.; Murach, T.; Muraczewski, A.; Muraishi, H.; Nakamori, T.; Nayak, A.; Nemmen, R.; Neto, J. P.; Nickel, L.; Niemiec, J.; Nieto, D.; Nievas Rosillo, M.; Nikolajuk, M.; Nikolic, L.; Nishijima, K.; Noda, K.; Nosek, D.; Novotny, V.; Nozaki, S.; Ohishi, M.; Ohtani, Y.; Okumura, A.; Olive, J. -F.; Ong, R. A.; Orienti, M.; Orito, R.; Orlandini, M.; Orlando, E.; Orlando, S.; Ostrowski, M.; Otero-Santos, J.; Oya, I.; Pagano, I.; Pagliaro, A.; Palatiello, M.; Panebianco, G.; Paneque, D.; Pantaleo, F. R.; Paredes, J. M.; Parmiggiani, N.; Patricelli, B.; Pe'er, A.; Pech, M.; Pecimotika, M.; Pensec, U.; Peresano, M.; Perez-Romero, J.; Persic, M.; Peters, K. P.; Petruk, O.; Piano, G.; Pierre, E.; Pietropaolo, E.; Pihet, M.; Pinchbeck, L.; Pirola, G.; Pittori, C.; Plard, C.; Podobnik, F.; Pohl, M.; Pollet, V.; Ponti, G.; Prandini, E.; Principe, G.; Priyadarshi, C.; Produit, N.; Prouza, M.; Pueschel, E.; Puehlhofer, G.; Pumo, M. L.; Queiroz, F.; Quirrenbach, A.; Raino, S.; Rando, R.; Razzaque, S.; Regeard, M.; Reimer, A.; Reimer, O.; Reisenegger, A.; Rhode, W.; Ribeiro, D.; Ribo, M.; Ricci, C.; Richtler, T.; Rico, J.; Rieger, F.; Riitano, L.; Rizi, V.; Roache, E.; Fernandez, G. Rodriguez; Rodriguez Frias, M. D.; Rodriguez-Vazquez, J. J.; Romano, P.; Romeo, G.; Rosado, J.; de Leon, A. Rosales; Rowell, G.; Rudak, B.; Ruiter, A. J.; Rulten, C. B.; Sadeh, I.; Saha, L.; Saito, T.; Salzmann, H.; Sanchez-Conde, M.; Sandaker, H.; Sangiorgi, P.; Sano, H.; Santander, M.; Santos-Lima, R.; Sapienza, V.; Saric, T.; Sarkar, A.; Sarkar, S.; Saturni, F. G.; Savarese, S.; Scherer, A.; Schiavone, F.; Schipani, P.; Schleicher, B.; Schovanek, P.; Schubert, J. L.; Schwanke, U.; Seglar Arroyo, M.; Seitenzahl, I. R.; Sergijenko, O.; Servillat, M.; Siegert, T.; Siejkowski, H.; Siqueira, C.; Sliusar, V.; Slowikowska, A.; Sol, H.; Spencer, S. T.; Spiga, D.; Stamerra, A.; Stanic, S.; Starecki, T.; Starling, R.; Stawarz, L.; Steppa, C.; Hatlen, E. Saether; Stolarczyk, T.; Striskovic, J.; Suda, Y.; Swierk, P.; Tajima, H.; Tak, D.; Takahashi, M.; Takeishi, R.; Tavernier, T.; Tejedor, L. A.; Terauchi, K.; Teshima, M.; Testa, V.; Tian, W. W.; Tibaldo, L.; Tibolla, O.; Todero Peixoto, C. J.; Torradeflot, F.; Torres, D. F.; Tosti, G.; Tothill, N.; Toussenel, F.; Tramacere, A.; Travnicek, P.; Tripodo, G.; Trois, A.; Truzzi, S.; Tutone, A.; Vaclavek, L.; Vacula, M.; Vallania, P.; Valles, R.; van Eldik, C.; van Scherpenberg, J.; Vandenbroucke, J.; Vassiliev, V.; Vazquez Acosta, M.; Vecchi, M.; Ventura, S.; Vercellone, S.; Verna, G.; Viana, A.; Viaux, N.; Vigliano, A.; Vignatti, J.; Vigorito, C. F.; Villanueva, J.; Visentin, E.; Vitale, V.; Vodeb, V.; Voisin, V.; Voitsekhovskyi, V.; Vorobiov, S.; Voutsinas, G.; Vovk, I.; Vuillaume, T.; Wagner, S. J.; Walter, R.; White, M.; White, R.; Wierzcholska, A.; Will, M.; Williams, D. A.; Wohlleben, F.; Wolter, A.; Yamamoto, T.; Yang, L.; Yoshida, T.; Yoshikoshi, T.; Zaharijas, G.; Zampieri, L.; Sanchez, R. Zanmar; Zavrtanik, D.; Zavrtanik, M.; Zdziarski, A. A.; Zech, A.; Zhang, W.; Zhdanov, V. I.; Zietara, K.; Zivec, M.; Zuriaga-Puig, J.
    Monochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from astrophysical or instrumental backgrounds. We provide an updated assessment of the sensitivity of the Cherenkov Telescope Array (CTA) to such signals, based on observations of the Galactic centre region as well as of selected dwarf spheroidal galaxies. We find that current limits and detection prospects for dark matter masses above 300 GeV will be significantly improved, by up to an order of magnitude in the multi-TeV range. This demonstrates that CTA will set a new standard for gamma-ray astronomy also in this respect, as the world's largest and most sensitive high-energy gamma-ray observatory, in particular due to its exquisite energy resolution at TeV energies and the adopted observational strategy focussing on regions with large dark matter densities. Throughout our analysis, we use up-to-date instrument response functions, and we thoroughly model the effect of instrumental systematic uncertainties in our statistical treatment. We further present results for other potential signatures with sharp spectral features, e.g. box-shaped spectra, that would likewise very clearly point to a particle dark matter origin.
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    The effect of regularization in portfolio selection problems
    (2020) Pagnoncelli, B. K.; Del Canto Monge, Felipe; Cifuentes, A.