Results 21 to 30 of about 1,089,305 (292)

Chondrichthyan Diversity, Conservation Status, and Management Challenges in Costa Rica

Frontiers in Marine Science, 2018
Understanding key aspects of the biology and ecology of chondrichthyan fishes (sharks, rays, and chimeras), as well as the range of threats affecting their populations is crucial given the rapid rate at which some species are declining.
Mario Espinoza, Mario Espinoza, Eric Díaz, Arturo Angulo, Arturo Angulo, Arturo Angulo, Sebastián Hernández, Sebastián Hernández, Tayler M. Clarke, Tayler M. Clarke   +9 more
doaj   +1 more source

Clues from the prompt emission of GRB 080319B [PDF]

, 2008
The extremely bright optical flash that accompanied GRB 080319B suggested, at first glance, that the prompt $\gamma$-rays in this burst were produced by Synchrotron self Compton (SSC). We analyze here the observed optical and $\gamma$ spectrum.
Boër, Cwiok, Golenetskii, Karpov, Kobayashi, Kumar, Li, Piran, Racusin, Re'em Sari, Sari, Sari, Tsvi Piran, Vreeswijk, Wei, Yuan-Chuan Zou, Zou   +16 more
core   +2 more sources

Active Galactic Nuclei with Starbursts: Sources for Ultra High Energy Cosmic Rays [PDF]

, 2009
Ultra high energy cosmic ray events presently show a spectrum, which we interpret here as galactic cosmic rays due to a starburst in the radio galaxy Cen A pushed up in energy by the shock of a relativistic jet.
A. MELI, Gergely L., Ginzburg V. L., I. C. MARIŞ, J. K. BECKER, Junkes N., L. CARAMETE, L. GERGELY, P. L. BIERMANN, Ryu D., Stanev T., T. STANEV, V. DE SOUZA   +12 more
core   +3 more sources

Biodiversity, Catchability, and Conservation Status of Sharks and Rays from Fishermen's Bycatch at the Pondokdadap Coastal Fishing Port, East Java - Indonesia [PDF]

BIO Web of Conferences
Sharks and rays belong to the Chondrichthyes class, characterized by low reproductive rates and slow growth rates, which makes them highly vulnerable to overfishing. These conservation priority fish are generally bycatch of fishermen.
Latuconsina Husain, Prasetyo Hamdani Dwi, Anggraini Nurlaila, Andrimida Anthon, Zulfami Ilham, Abass Kasim Sakran   +5 more
doaj   +1 more source

The origin of galactic cosmic rays [PDF]

, 2007
The origin of galactic cosmic rays is one of the most interesting unsolved problems in astroparticle physics. Experimentally, the problem is attacked by a multi-disciplinary effort, namely by direct measurements of cosmic rays above the atmosphere, by ...
Aharonian, Aharonian, Aharonian, Allan, Amenomori, Antoni, Antoni, Antoni, Antoni, Antoni, Apel, Ardouin, Baade, Bell, Berezhko, Berezhko, Blanford, Candia, Doll, Engel, Engler, Falcke, Ferenc, Fermi, Gahbauer, Gaisser, Garcia-Munoz, Garzia-Munoz, Guzik, Hess, Hinton, Huege, Hörandel, Hörandel, Hörandel, Hörandel, Hörandel, Hörandel, Hörandel, Hörandel, Hörandel, Jörg R. Hörandel, Kestel, Krymsky, Maier, Matthews, Milke, Navarra, Ptuskin, Seo, Simpson, Strong, Völk, Weekes, Yanasak   +54 more
core   +3 more sources

X-rays

British Journal of Radiology: Röntgen Society Section, 1926
Bibliography at end of each chapter. ; Mode of access: Internet.
Broglie, Maurice de, 1875-1960 http://id.loc.gov/authorities/names/no00066931 http://viaf.org/viaf/108713223, Clarke, J. R. (Joseph Ryle), translator. http://id.loc.gov/authorities/names/no98102447 http://viaf.org/viaf/118485904   +1 more
openaire   +1 more source

Mitigation of Elasmobranch Bycatch in Trawlers: A Case Study in Indian Fisheries

Frontiers in Marine Science, 2020
Bycatch poses a significant threat to marine megafauna, such as elasmobranchs. India has one of the highest elasmobranch landings globally, through both targeted catch and bycatch.
Trisha Gupta, Hollie Booth, William Arlidge, Chetan Rao, Muralidharan Manoharakrishnan, Naveen Namboothri, Kartik Shanker, Kartik Shanker, E. J. Milner-Gulland   +8 more
doaj   +1 more source

On the Detectability of Galactic Dark Matter Annihilation into Monochromatic Gamma-rays

, 2010
Monochromatic gamma-rays are thought to be the smoking gun signal for identifying the dark matter annihilation. However, the flux of monochromatic gamma-rays is usually suppressed by the virtual quantum effects since dark matter should be neutral and ...
Abdo A A, Abdo A A, Catena R, Gaisser T K, Ghigna S, Gondolo P, Guo-Ming Chen, Hunter S D, Jing Y P, Mayer-Hasselwander H A, Moore B, Navarro J F, Qiang Yuan, Salucci P, Sreekumar P, Xiao-Jun Bi, Zentner A R, Zhi-Cheng Tang   +17 more
core   +1 more source

New generation Cherenkov telescope array: HADAR and its performance introduction

Nuclear Physics B
Astrophysical very high energy (VHE) gamma-rays are believed to result almost exclusively from the interactions of populations of highly relativistic particles with ambient matter or photon fields.
Qingyuan Hou, Qingqian Zhou, Tianlu Chen, Youliang Feng, Hengjiao Liu, Yiqing Guo, Cheng Liu, Zihao Zhang, Xinlong Li, Qi Gao, Maoyuan Liu, Xiangli Qian, Yuanqi Liu, Jiadan Xie, Shanjie Shu, Weiqi Han, Qijiao Fang, Yanan Wang, Shaohua Zhang   +18 more
doaj   +1 more source

Cosmic rays and molecular clouds

, 2012
This paper deals with the cosmic-ray penetration into molecular clouds and with the related gamma--ray emission. High energy cosmic rays interact with the dense gas and produce neutral pions which in turn decay into two gamma rays.
A Atoyan, A Bamba, A Dar, A Giuliani, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AA Abdo, AM Atoyan, AM Hillas, AR Bell, AR Bell, AR Bell, AW Strong, AW Strong, B Reville, C Ceccarelli, CD Dermer, CJ Cesarsky, D Caprioli, DC Ellison, DC Ellison, DF Cioffi, DG Wentzel, E Parizot, F Casse, F Combes, F Giordano, FA Aharonian, FA Aharonian, FA Aharonian, FA Aharonian, FA Aharonian, FA Aharonian, G Giacinti, G Morlino, G Sinnis, GF Krymskii, GR Blumenthal, H Li, H Yan, HJ Völk, J Aleksić, J Rho, J Vink, JA Hinton, JH Black, JR Jokipii, K Koyama, M Ackermann, M Ackermann, M Actis, M Mori, M Tsuboi, MA Malkov, ML Longair, MR Issa, P Blasi, R Cowsik, R Kulsrud, R Schlickeiser, RD Blandford, RJ Protheroe, RM Crutcher, S Casanova, S Casanova, S Gabici, S Gabici, S Gabici, S Gabici, SD Hunter, SP Reynolds, SR Kelner, T Inoue, T Kamae, T Montmerle, T Naito, T Tanaka, TK Gaisser, VN Zirakashvili, VS Berezinskii, VS Ptuskin, VS Ptuskin, VS Ptuskin, VS Ptuskin, W Baade, Y Fujita, Y Fukui, Y Ohira, Y Ohira, Y Uchiyama, Y Uchiyama, Y Uchiyama, Y Uchiyama   +96 more
core   +3 more sources