Zobrazeno 1 - 10
of 73
pro vyhledávání: '"polarimeters [Instrumentation]"'
Autor:
Quintero Noda, C., Schlichenmaier, R., Bellot Rubio, L. R., Löfdahl, M. G., Khomenko, E., Jurčák, J., Leenaarts, J., Kuckein, C., González Manrique, S. J., Gunár, S., Nelson, C. J., de la Cruz Rodríguez, J., Tziotziou, K., Tsiropoula, G., Aulanier, G., Aboudarham, J., Allegri, D., Alsina Ballester, E., Amans, J. P., Asensio Ramos, A., Bailén, F. J., Balaguer, M., Baldini, V., Balthasar, H., Barata, T., Barczynski, K., Barreto Cabrera, M., Baur, A., Béchet, C., Beck, C., Belío-Asín, M., Bello-González, N., Belluzzi, L., Bentley, R. D., Berdyugina, S. V., Berghmans, D., Berlicki, A., Berrilli, F., Berkefeld, T., Bettonvil, F., Bianda, M., Bienes Pérez, J., Bonaque-González, S., Brajša, R., Bommier, V., Bourdin, P. -A., Burgos Martín, J., Calchetti, D., Calcines, A., Calvo Tovar, J., Campbell, R. J., Carballo-Martín, Y., Carbone, V., Carlin, E. S., Carlsson, M., Castro López, J., Cavaller, L., Cavallini, F., Cauzzi, G., Cecconi, M., Chulani, H. M., Cirami, R., Consolini, G., Coretti, I., Cosentino, R., Cózar-Castellano, J., Dalmasse, K., Danilovic, S., de Juan Ovelar, M., del Moro, D., del Pino Alemán, T., del Toro Iniesta, J. C., Denker, C., Dhara, S. K., Di Marcantonio, P., Díaz Baso, C. J., Diercke, A., Dineva, E., Díaz-García, J. J., Doerr, H. -P., Doyle, G., Erdelyi, R., Ermolli, I., Escobar Rodríguez, A., Esteban Pozuelo, S., Faurobert, M., Felipe, T., Feller, A., Feijoo Amoedo, N., Femenía Castellá, B., Fernandes, J., Ferro Rodríguez, I., Figueroa, I., Fletcher, L., Franco Ordovas, A., Gafeira, R., Gardenghi, R., Gelly, B., Giorgi, F., Gisler, D., Giovannelli, L., González, F., González, J. B., González-Cava, J. M., González García, M., Gömöry, P., Gracia, F., Grauf, B., Greco, V., Grivel, C., Guerreiro, N., Guglielmino, S. L., Hammerschlag, R., Hanslmeier, A., Hansteen, V., Heinzel, P., Hernández-Delgado, A., Hernández Suárez, E., Hidalgo, S. L., Hill, F., Hizberger, J., Hofmeister, S., Jägers, A., Janett, G., Jarolim, R., Jess, D., Jiménez Mejías, D., Jolissaint, L., Kamlah, R., Kapitán, J., Kašparová, J., Keller, C. U., Kentischer, T., Kiselman, D., Kleint, L., Klvana, M., Kontogiannis, I., Krishnappa, N., Kučera, A., Labrosse, N., Lagg, A., Landi Degl'Innocenti, E., Langlois, M., Lafon, M., Laforgue, D., Le Men, C., Lepori, B., Lepreti, F., Lindberg, B., Lilje, P. B., López Ariste, A., López Fernández, V. A., López Jiménez, A. C., López López, R., Manso Sainz, R., Marassi, A., Marco de la Rosa, J., Marino, J., Marrero, J., Martín, A., Martín Gálvez, A., Martín Hernando, Y., Masciadri, E., Martínez González, M., Matta-Gómez, A., Mato, A., Mathioudakis, M., Matthews, S., Mein, P., Merlos García, F., Moity, J., Montilla, I., Molinaro, M., Molodij, G., Montoya, L. M., Munari, M., Murabito, M., Núñez Cagigal, M., Oliviero, M., Orozco Suárez, D., Ortiz, A., Padilla-Hernández, C., Paéz Mañá, E., Paletou, F., Pancorbo, J., Pastor Cañedo, A., Pastor Yabar, A., Peat, A. W., Pedichini, F., Peixinho, N., Peñate, J., Pérez de Taoro, A., Peter, H., Petrovay, K., Piazzesi, R., Pietropaolo, E., Pleier, O., Poedts, S., Pötzi, W., Podladchikova, T., Prieto, G., Quintero Nehrkorn, J., Ramelli, R., Ramos Sapena, Y., Rasilla, J. L., Reardon, K., Rebolo, R., Regalado Olivares, S., Reyes García-Talavera, M., Riethmüller, T. L., Rimmele, T., Rodríguez Delgado, H., Rodríguez González, N., Rodríguez-Losada, J. A., Rodríguez Ramos, L. F., Romano, P., Roth, M., Rouppe van der Voort, L., Rudawy, P., Ruiz de Galarreta, C., Rybák, J., Salvade, A., Sánchez-Capuchino, J., Sánchez Rodríguez, M. L., Sangiorgi, M., Sayède, F., Scharmer, G., Scheiffelen, T., Schmidt, W., Schmieder, B., Scirè, C., Scuderi, S., Siegel, B., Sigwarth, M., Simões, P. J. A., Snik, F., Sliepen, G., Sobotka, M., Socas-Navarro, H., Sola La Serna, P., Solanki, S. K., Soler Trujillo, M., Soltau, D., Sordini, A., Sosa Méndez, A., Stangalini, M., Steiner, O., Stenflo, J. O., Štěpán, J., Strassmeier, K. G., Sudar, D., Suematsu, Y., Sütterlin, P., Tallon, M., Temmer, M., Tenegi, F., Tritschler, A., Trujillo Bueno, J., Turchi, A., Utz, D., van Harten, G., van Noort, M., van Werkhoven, T., Vansintjan, R., Vaz Cedillo, J. J., Vega Reyes, N., Verma, M., Veronig, A. M., Viavattene, G., Vitas, N., Vögler, A., von der Lühe, O., Volkmer, R., Waldmann, T. A., Walton, D., Wisniewska, A., Zeman, J., Zeuner, F., Zhang, L. Q., Zuccarello, F., Collados, M.
Publikováno v:
Astronomy & astrophysics, 2022 [Peer Reviewed Journal]
Astronomy & Astrophysics, 666:A21
R. Schlichenmaier
Astronomy and Astrophysics
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 666, ⟨10.1051/0004-6361/202243867⟩
European Solar Telescope 2022, ' The European Solar Telescope ', Astronomy and Astrophysics, vol. 666, A21 . https://doi.org/10.1051/0004-6361/202243867
Astronomy & Astrophysics, 666:A21
R. Schlichenmaier
Astronomy and Astrophysics
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 666, ⟨10.1051/0004-6361/202243867⟩
European Solar Telescope 2022, ' The European Solar Telescope ', Astronomy and Astrophysics, vol. 666, A21 . https://doi.org/10.1051/0004-6361/202243867
Full list of authors: Noda, C. Quintero; Schlichenmaier, R.; Bellot Rubio, L. R.; Lofdahl, M. G.; Khomenko, E.; Leenaarts, J.; Kuckein, C.; Gonzalez Manrique, S. J.; Gunar, S.; Nelson, C. J.; Rodriguez, J. de la Cruz; Tziotziou, K.; Tsiropoula, G.; A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::893e52b59f12f7464edddbd44b1398f4
Autor:
O. C. St. Cyr, D. Orozco Suárez, Ester Antonucci, Sunil Sidher, Marina Battaglia, Phillip C. Chamberlin, V. Andretta, David Long, Johann Hirzberger, A. Giunta, Silvano Fineschi, N. Bach, Simon Plunkett, C. Watson, B. Mampaey, S. Fahmy, I. Tanco, S. Caminade, Andrei Zhukov, Andreas Lagg, David Berghmans, Joachim Woch, David R. Williams, G. J. Hurford, M. Haberreiter, T. Grundy, Shane A. Maloney, Donald M. Hassler, S. Parenti, J. J. Cerullo, Eric Buchlin, Sami K. Solanki, Federico Landini, A. Pacros, J. Carlyle, A. De Groof, Angelos Vourlidas, V. Martinez-Pillet, J. Lefort, Alexis P. Rouillard, Cis Verbeeck, S. Lodiot, Mats Carlsson, Gianalfredo Nicolini, T. Straus, M. Kolleck, L. Etesi, D. R. McMullin, L. Sanchez, R. A. Howard, J. C. del Toro Iniesta, Daniel Müller, Joseph M. Davila, F. Marliani, Robin C. Colaninno, F. Auchère, Lucia Kleint, A. Philippon, Andrzej Fludra, Luca Teriaca, Louise K. Harra, Udo Schühle, Marco Romoli, William T. Thompson, Holly Gilbert, Maurizio Pancrazzi, Alessandro Bemporad, P. Rochus, Säm Krucker, N. Rich, I. Zouganelis, Hardi Peter, Daniele Spadaro, Thomas Wiegelmann
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2020, 642, pp.A6. ⟨10.1051/0004-6361/201937032⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 642, pp.A6. ⟨10.1051/0004-6361/201937032⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomy & Astrophysics, 642
Astronomy and Astrophysics-A&A, 2020, 642, pp.A6. ⟨10.1051/0004-6361/201937032⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 642, pp.A6. ⟨10.1051/0004-6361/201937032⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomy & Astrophysics, 642
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the orig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07c01f5aaa714e91181ca84e10462ec7
http://hdl.handle.net/10261/228426
http://hdl.handle.net/10261/228426
Autor:
A. Pollo, Han-Cheng Li, B. B. Wu, N. Gauvin, Jacek Szabelski, T. Tymieniecka, Xin Wu, Shaolin Xiong, Wojtek Hajdas, Merlin Kole, Nicolas Produit, Jochen Greiner, Jianchao Sun, J. Burgess, Dominik Rybka, S. N. Zhang, N. De Angelis, F. Berlato, Y.J. Zhang, L.M. Song, Y. Wang, Z.H. Li
Publikováno v:
Astronomy and Astrophysics, Vol. 644 (2020) P. A124
Despite over 50 years of research, many open questions remain about the origin and nature of GRBs. Polarization measurements of the prompt emission of these extreme phenomena have long been thought to be the key to answering a range of these question
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b53e83640349783a7fa406970dbdf40
Autor:
Ramaprakash, A. N., Rajarshi, C. V., Das, H. K., Khodade, P., Modi, D., Panopoulou, G., Maharana, S., Blinov, D., Angelakis, E., Casadio, C., Fuhrmann, L., Hovatta, T., Kiehlmann, S., King, O. G., Kylafis, N., Kougentakis, A., Kus, A., Mahabal, A., Marecki, A., Myserlis, I., Paterakis, G., Paleologou, E., Liodakis, I., Papadakis, I., Papamastorakis, I., Pavlidou, V., Pazderski, E., Pearson, T. J., Readhead, A. C.S., Reig, P., Słowikowska, A., Tassis, K., Zensus, J. A.
We present the design and performance of RoboPol, a four-channel optical polarimeter operating at the Skinakas Observatory in Crete, Greece. RoboPol is capable of measuring both relative linear Stokes parameters q and u (and the total intensity I) in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______661::0d980c6307897bbf89a165aa2300739e
https://aaltodoc.aalto.fi/handle/123456789/43451
https://aaltodoc.aalto.fi/handle/123456789/43451
Autor:
Kuridze, D., Mathioudakis, M., Morgan, H., Oliver, R., Kleint, L., Zaqarashvili, T. V., Reid, A., Koza, J., L��fdahl, M. G., Hillberg, T., Kukhianidze, V., Hanslmeier, A.
Publikováno v:
Kuridze, D, Mathioudakis, M, Morgan, H, Oliver, R, Keint, L, Zaqarashvili, T V, Koza, J, Löfdahl, M G, Hillberg, T, Kukhianidze, V, Reid, A & Hanslmeier, A 2019, ' Mapping the Magnetic Field of Flare Coronal Loops ', The Astrophysical Journal, vol. 874, no. 2, 126, pp. 126 . https://doi.org/10.3847/1538-4357/ab08e9, https://doi.org/10.3847/1538-4357/ab08e9
Here we report on the unique observation of flaring coronal loops at the solar limb using high resolution imaging spectropolarimetry from the Swedish 1-meter Solar Telescope. The vantage position, orientation and nature of the chromospheric material
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fffe1691322fb18b3cc92d0a79b635e8
https://pure.qub.ac.uk/en/publications/mapping-the-magnetic-field-of-flare-coronal-loops(c8eca32b-b3d6-4284-b82a-38be13d2493d).html
https://pure.qub.ac.uk/en/publications/mapping-the-magnetic-field-of-flare-coronal-loops(c8eca32b-b3d6-4284-b82a-38be13d2493d).html
Autor:
J. J. John, O. G. King, Angela C. Taylor, T. J. Pearson, M. Jones, Stephen Muchovej, Charles Copley, Clive Dickinson, Mark Stevenson
Publikováno v:
Stevenson, M A, Pearson, T J, Jones, M E, Copley, C J, Dickinson, C, John, J J, King, O G, Muchovej, S J C & Taylor, A C 2019, ' The C-Band All-Sky Survey (C-BASS) : Digital backend for the northern survey ', Monthly Notices of the Royal Astronomical Society, vol. 484, no. 4, pp. 5377-5388 . https://doi.org/10.1093/mnras/stz313
The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarization survey at a frequency of 5 GHz, designed to provide data complementary to the all-sky surveys of WMAP and Planck and future CMB B-mode polarization imaging surveys. We describe the de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15977ae5277842f4b6303308bad0969a
https://ora.ox.ac.uk/objects/uuid:98c9a45a-e877-46a0-8b7c-b7730595d0df
https://ora.ox.ac.uk/objects/uuid:98c9a45a-e877-46a0-8b7c-b7730595d0df
Autor:
Torsten Böhm, Alex C. Carciofi, Raman K. Prinja, Colin P. Folsom, Rodolfo H. Barbá, Lex Kaper, B. de Batz, Jean-François Donati, J. C. Bouret, Werner W. Weiss, J. Braithwaite, David A. Bohlender, John D. Landstreet, Fabrice Martins, A. F. J. Moffat, W. L. F. Marcolino, Mary E. Oksala, Richard Ignace, Coralie Neiner, J. O. Sundqvist, C. Catala, N. St. Louis, I. Yakunin, A. Blazère, Yaël Nazé, B. Leroy, Lilia Ferrario, Alexander W. Fullerton, Evelyne Alecian, Stanley P. Owocki, Richard H. D. Townsend, Stefano Bagnulo, J. D. Bailey, David H. Cohen, Stéphane Mathis, Theresa Lüftinger, Alexandre David-Uraz, Gregg A. Wade, Th. Rivinius, Jason Grunhut, Nadine Manset, D. Harrington, Matt Shultz, Jorick S. Vink, Michel Aurière, Oleg Kochukhov, Véronique Petit, Maryline Briquet, Asif ud-Doula, Huib F. Henrichs, I. D. Howarth
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2015, 456 (1), pp.2-22. ⟨10.1093/mnras/stv2568⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2015, 456 (1), pp.2-22. ⟨10.1093/mnras/stv2568⟩
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Monthly Notices of the Royal Astronomical Society, 456(1), 2-22. Oxford University Press
Monthly Notices of the Royal Astronomical Society, 2015, 456 (1), pp.2-22. ⟨10.1093/mnras/stv2568⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2015, 456 (1), pp.2-22. ⟨10.1093/mnras/stv2568⟩
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Monthly Notices of the Royal Astronomical Society, 456(1), 2-22. Oxford University Press
The MiMeS project is a large-scale, high resolution, sensitive spectropolarimetric investigation of the magnetic properties of O and early B type stars. Initiated in 2008 and completed in 2013, the project was supported by 3 Large Program allocations
Autor:
Akio Hoshino, Katsuhiro Hayashi, Manabu Ishida, Hideki Uchiyama, Takayuki Tamura, Shunji Kitamoto, Shin'ichiro Takeda, Shinya Saito, Daisuke Yonetoku, Peter J. Serlemtsos, Yoshitaka Ishisaki, Masachika Iwai, Hiroshi Nakajima, Megumi Shidatsu, Kumi Ishikawa, Hans A. Krimm, Ken Ebisawa, Yasuyuki T. Tanaka, Massimiliano Galeazzi, Andrew C. Fabian, Brian R. McNamara, Shu Koyama, Samar Safi-Harb, Jan-Willem den Herder, R. Sato, Isamu Hatsukade, Hironori Matsumoto, Yoshitomo Maeda, Missagh Mehdipour, Teruaki Enoto, Hirokazu Odaka, Jelle de Plaa, Hiroshi Tsunemi, Maurice A. Leutenegger, Francesco Tombesi, Jelle Kaastra, Richard L. Kelley, Kazuhiro Nakazawa, Ikuyuki Mitsuishi, Takuya Miyazawa, G. Sato, Yohko Tsuboi, Frederick S. Porter, Norbert Werner, Fumie Akimoto, Junko S. Hiraga, Magnus Axelsson, Shinya Yamada, Ciro Pinto, David H. Lumb, Shigeo Yamauchi, Maxim Markevitch, Yuto Ichinohe, Takeshi Go Tsuru, Kosuke Sato, Koji Mori, Caroline A. Kilbourne, Yuichi Terashima, Kyoko Matsushita, Timothy R. Kallman, Philippe Laurent, Olivier Limousin, Toru Tamagawa, Luigi C. Gallo, Aya Bamba, Roger Blandford, Kiyoshi Hayashida, Yasunobu Uchiyama, Cor P. de Vries, Tsuneyoshi Kamae, Hirofumi Noda, Gregory V. Brown, Carlo Ferrigno, Yoshihiro Ueda, Yuusuke Uchida, Eric D. Miller, Yuichiro Ezoe, Andrea Goldwurm, Hiromi Seta, Frits Paerels, Katja Pottschmidt, Kazuhiro Sakai, Shin'ichiro Uno, Yoshito Haba, Stéphane Paltani, Hiromitsu Takahashi, Kazuhisa Mitsuda, Masanori Ohno, Satoshi Sugita, Masahiro Tsujimoto, Christopher S. Reynolds, Shin Mineshige, Ryuichi Fujimoto, Peter Kretschmar, Masayoshi Nobukawa, Yoh Takei, Tahir Yaqoob, Jon M. Miller, Dan R. Wilkins, Meng P. Chiao, Matteo Guainazzi, Aurora Simionescu, Hisamitsu Awaki, Paolo De Coppi, Katsuji Koyama, Masanobu Ozaki, Kumiko K. Nobukawa, Yasuharu Sugawara, Daniel Maier, Tadayuki Takahashi, Jun Kataoka, Aya Kubota, Hiroyuki Uchida, Laura Brenneman, John P. Hughes, Takayoshi Kohmura, Takaaki Tanaka, Hajime Inoue, Lorella Angelini, Toru Sasaki, Greg Madejski, Shutaro Ueda, Takao Nakagawa, Tadayasu Dotani, Maria Chernyakova, Motohide Kokubun, Takao Kitaguchi, Irina Zhuravleva, Shin Watanabe, Dan McCammon, Hideyuki Mori, Randall K. Smith, Edward M. Cackett, Norbert Schartel, Margherita Giustini, Megan E. Eckart, Tsunefumi Mizuno, Liyi Gu, Chris Done, Takeshi Nakamori, Takaya Ohashi, Shiu-Hang Lee, Michael Loewenstein, Adam R. Foster, Poshak Gandhi, Yasushi Fukazawa, Kenji Hamaguchi, Satoru Katsuda, Knox S. Long, Ilana M. Harrus, Yuzuru Tawara, Hideyo Kunieda, Lukasz Stawarz, C. Megan Urry, Richard F. Mushotzky, Nobuyuki Kawai, Brian J. Williams, Tetsu Kitayama, Felix Aharonian, Yoshiyuki Inoue, Noriko Y. Yamasaki, Eugenio Ursino, Takayuki Hayashi, Yukikatsu Terada, Makoto Yamauchi, Yasuo Tanaka, Steven W. Allen, Kazuo Makishima, Marc Audard, Shinya Nakashima, Naomi Ota, Hiroyasu Tajima, Hiroshi Murakami, Hiroshi Tomida, Hiroya Yamaguchi, Ryo Iizuka, Kouichi Hagino, Yoichi Yatsu, Kazutaka Yamaoka, Koji Mukai, Abderahmen Zoghbi, Makoto Tashiro, Ann Hornschemeier, Makoto Sawada, Marshall W. Bautz, Takashi Okajima, Esra Bulbul, Yang Soong, Akihiro Furuzawa, Hiroki Akamatsu, Andrew Szymkowiak, Robert Petre, Elisa Costantini
Publikováno v:
Publ.Astron.Soc.Jap.
Publ.Astron.Soc.Jap., 2018, 70 (6), pp.113. ⟨10.1093/pasj/psy118⟩
Publ.Astron.Soc.Jap., 2018, 70 (6), pp.113. ⟨10.1093/pasj/psy118⟩
著者人数: 193名(所属. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS): 堂谷, 忠靖; 海老沢, 研; 林, 克洋; 飯塚, 亮; 井上, 芳幸; 石田, 学; 石川, 久美; 岩井, 将親; 国分, 紀秀; 小山, 志勇; 前
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a187cf5f3bda866281903130ef8ff554
http://arxiv.org/abs/1810.00704
http://arxiv.org/abs/1810.00704
Publikováno v:
Physics and Astronomy Publications
We analyse the spectrum of the Hamiltonian of a photon propagating in a strong magnetic field B ∼ Bcr, where Bcr=m2e≃4.4×1013" role="presentation">Bcr=m2e≃4.4×1013 G is the Schwinger critical field. We show that the anomalous magnetic moment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::793317b7486d209baf44ea2125d45601
https://ir.lib.uwo.ca/physicspub/115
https://ir.lib.uwo.ca/physicspub/115
Autor:
Sergey Karpov, Beskin, G., Biryukov, A., Bondar, S., Ivanov, E., Katkova, E., Orekhova, N., Perkov, A., Sasyuk, V.
Publikováno v:
SCOPUS13351842-2017-47-2-SID85030629616
Scopus-Elsevier
Publons
Scopus-Elsevier
Publons
Here we present the summary of first years of operation and the first results of a novel 9-channel wide-field optical monitoring system with sub-second temporal resolution, Mini-MegaTORTORA (MMT-9), which is in operation now at Special Astrophysical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::6d1121435217de95bdcfae8a8155ae2e
https://openrepository.ru/article?id=239256
https://openrepository.ru/article?id=239256