Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory

The Pierre Auger Collaboration has reported. evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies E > E-th = 5.5 x 10(19) eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direction of Centaurus A. If the particles responsible for these excesses at E > E-th are heavy nuclei with charge Z, the proton component of the sources should lead to excesses in the same regions at energies E/Z. We here report the lack of anisotropies in these directions at energies above E-th/Z (for illustrative values of Z = 6, 13, 26). If the anisotropies above E-th are due to nuclei with charge Z, and under reasonable assumptions about the acceleration process, these observations imply stringent constraints on the allowed proton fraction at the lower energies.

Almonastires y rábitas: espiritualidad islámica individual y defensa colectiva de la comunidad. Espiritualidad y geopolítica en los orígenes de Almonaster la Real

Primeramente se describe el ŷihād, su origen coránico, la escatología asociada y el derecho musulmán asociado al mismo, para acabar explicando cómo el espíritu colectivo y estatal del ŷihād evolucionó hacia la espiritualidad individual del ribāṭ en Al-Andalus. En la segunda parte se enumeran los topónimos al-Munastīr en la península Ibérica, asociados a construcciones eclesiásticas visigodas precedentes, y se explica la geopolítica de Almonaster la Real: en la vía romana que comunicaba Sevilla y Huelva por la montaña onubense con Beja, esta vía de origen romano se usó hasta fin del s. X. La vigilancia en época omeya de este itinerario esencial de comunicación con Portugal dio origen a este “lugar de ribāṭ” que fue Almonaster, fundado sobre restos tardorromanos precedentes.

GM X material substitution weight reduction/cost effectiveness study. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Primera conferencia panamericana : (Washington, 2 X. 1889 - 19 IV. 1890.) / Ernesto Quesada.

"Curso de legislación y tratados panamericanos. Facultad de derecho y ciencias socvales. Conferencia dada el lunes 6 de octobre de 1919."

Comparison of radiation exposures from panoramic dental X-ray units /

"Dec. 1976."

Handbook of mammographic x-ray spectra /

Mode of access: Internet.

Doct. Francisci Suarez Granatensis, ex Societate Iesu, Tractatus theologicus, de vera intelligentia auxilii efficacis, eiúque concordia, cum libero arbitrio : opys posthumum, ad stabiliendas definitiones fidei, à S.D.N. Innocentio X. contra Iansenium eiéusque partiarios, editas, accommodatum : prodit nunc primum.

Errors in pagination: nos. 201, 265-266, and 414 numbered respectively 191, 267-268, and 408; nos. 276-277 omitted.

Catalogue des livres et manuscrits formant la bibliothèque de feu M. lechevalier X. de Theux de Montjardin.

Mode of access: Internet.

Effects of various aging heat treatments and solution-annealing and aging heat treatments on tensile, creep, and stress-rupture strengths of inconel x sheet to temperatures of 1,400 degrees F /

Cover title.

Beta rays from H³ /

"LADC 100"

Oldsmobile Omega X-body baseline weight data. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Building code : Title X : reinforced concrete construction : revised December 13, 1911.

Mode of access: Internet.

Maternal, child health, and family planning services [microform] : hearings before the Subcommittee on Health and the Environment of the Committee on Energy and Commerce, House of Representatives, One Hundredth Congress, second session, February 25, 1988--healthy children, investing in the future; April 22, 1988--Title X of the Public Health Service Act (H.R. 3769).

"Serial no. 100-149."