Results 21 to 30 of about 13,514 (238)

A depression before a bump in the highest energy cosmic ray spectrum [PDF]

, 1997
We re-examine the interaction of ultra high energy nuclei with the microwave background radiation. We find that the giant dipole resonance leaves a new signature in the differential energy spectrum of iron sources located around 3 Mpc: A depression ...
D. J. Bird, D. J. Bird, F. Halzen, F. W. Stecker, F. W. Stecker, G. Blumenthal, G. Sigl, G. T. Zatsepin, J. D. Swain, J. L. Puget, J. W. Cronin, J. W. Elbert, K. Greisen, L. A. Anchordoqui, L. A. Anchordoqui, L. N. Epele, M. T. Dova, N. Hayashida, P. A. Shaver, S. Yoshida, T. Stanev, V. S. Berezinsky   +21 more
core   +2 more sources

Ultra high energy neutrino-nucleon cross section from cosmic ray experiments and neutrino telescopes [PDF]

, 2006
We deduce the cosmogenic neutrino flux by jointly analysing ultra high energy cosmic ray data from HiRes-I and II, AGASA and the Pierre Auger Observatory.
Abu-Zayyad, Abu-Zayyad, Aharonian, Ahlers, Anchordoqui, Anchordoqui, Andrieu, Antoniadis, Aoyama, Argyres, Arkani-Hamed, Arkani-Hamed, Armengaud, Bahcall, Banks, Barwick, Beresinsky, Beresinsky, Berezinsky, Berezinsky, Bergman, Bird, Bird, Capelle, Cornet, Cowan, Craig, Danny Marfatia, De Marco, Domokos, Dunkley, Elbert, Engel, Espinosa, Etchegoyen, Fodor, Fodor, Fodor, Frichter, Frichter, Gaisser, Gandhi, Gandhi, Greisen, Groom, Huber, Jain, Kalashev, Khoze, Kravchenko, McKay, Nagano, Nussinov, Patrick Huber, Protheroe, Reno, Ribordy, Ringwald, Semikoz, Sommers, Sreekumar, Stecker, Stecker, Strong, Takeda, Takeda, Tyler, V. Barger, Yoshida, Yoshida, Yoshida, Yoshida, Zatsepin   +72 more
core   +2 more sources

Proposta de previsão da capacidade de carga à tração de estacas tipo hélice contínua em solos granulares

Revista Principia, 2020
Foundations projects must present security measures concerning the structural element and soil-structure system failure and acceptable displacements.
Caio Cardoso Scipião, Alfran Sampaio Moura   +1 more
doaj   +1 more source

The Analysis of Soil Resistance During Screw Displacement Pile Installation

Studia Geotechnica et Mechanica, 2015
The application of screw displacement piles (SDP) is still increasing due to their high efficiency and many advantages. However, one technological problem is a serious disadvantage of those piles. It relates to the generation of very high soil resistance
Krasinski Adam
doaj   +1 more source

Relaxation of Optically Excited Carriers in Graphene [PDF]

, 2011
We explore the relaxation of photo-excited graphene by solving a transient Boltzmann transport equation with electron-phonon (e-ph) and electron-electron (e-e) scattering.
Avouris, Phaedon, Kim, Raseong, Perebeinos, Vasili   +2 more
core   +3 more sources

Extreme-Energy Cosmic Rays: Puzzles, Models, and Maybe Neutrinos [PDF]

, 2001
The observation of twenty cosmic-ray air-showers at and above 10^{20} eV poses fascinating problems for particle astrophysics: how the primary particles are accelerated to these energies, how the primaries get here through the 2.7K microwave background ...
Weiler, Thomas J.
core   +2 more sources

Comparison of Numerical Analyses with a Static Load Test of a Continuous Flight Auger Pile

Slovak Journal of Civil Engineering, 2014
The article deals with numerical analyses of a Continuous Flight Auger (CFA) pile. The analyses include a comparison of calculated and measured load-settlement curves as well as a comparison of the load distribution over a pile's length.
Hoľko Michal, Stacho Jakub
doaj   +1 more source

Assessment of surface parameters of VDW foundation piles using geodetic measurement techniques

Open Geosciences, 2020
This article presents in situ research on the side surface of Vor der Wand (VDW) foundation piles using 3D laser scanning and close-range photogrammetry to assess the morphology of pile concrete surface.
Muszyński Zbigniew, Wyjadłowski Marek
doaj   +1 more source

Heavy nuclei at the end of the cosmic ray spectrum? [PDF]

, 1999
We provide an account of the possible acceleration of iron nuclei up to energies $\sim300$ EeV in the nearby, metally-rich starburst galaxy NGC 253. It is suggested that particles can escape from the nuclear region with energies of $\sim10^{15}$ eV and ...
A. J. Owens, A. Ptak, C. G. Wynn-Williams, C. W. Engelbracht, D. A. Forbes, F. Halzen, F. W. Stecker, F. W. Stecker, F. W. Stecker, G. H. Rieke, G. H. Rieke, G. Romero, G. Rudstam, G. T. Zatsepin, J. L. Puget, J. M. Jackson, J. P. Rachen, J. R. Jokipii, J. R. Jokipii, J. S. Ulvestad, J. W. Elbert, K. Greisen, L. A. Anchordoqui, L. A. Anchordoqui, L. N. Epele, L. N. Epele, L. N. Epele, L. O’C. Drury, M. A. Malkan, P. J. McCarthy, P. L. Biermann, P. L. Biermann, P. O. Lagage, R. Beck, R. J. Antonucci, S. Yoshida, T. A. D. Paglione, T. A. D. Paglione, T. Davidge, T. M. Heckman, T. Stanev, V. S. Berezinskii, V. S. Berezinsky, W. F. Wall, W. Rice   +44 more
core   +2 more sources

Sustainability-Oriented Multi-Criteria Analysis of Different Continuous Flight Auger Piles [PDF]

Sustainability, 2021
With increasing construction activity and concrete consumption globally, the economic, environmental, and social impacts of human activities continue to increase rapidly. Therefore, it is imperative to assess the choice and construction of each structure and structural component from a sustainability-based perspective.
Josa i Culleré, Irene, Tošić, Nikola, Marinkovic, Snežana, Fuente Antequera, Albert de la, Aguado de Cea, Antonio   +4 more
openaire   +4 more sources