Results 41 to 50 of about 277,653 (299)

Estimation of Cosmic-Ray-Induced Atmospheric Ionization and Radiation at Commercial Aviation Flight Altitudes

Applied Sciences, 2022
The main source of the ionization of the Earth’s atmosphere is the cosmic radiation that depends on solar activity as well as geomagnetic activity. Galactic cosmic rays constitute a permanent radiation background and contribute significantly to the ...
Panagiota Makrantoni, Anastasia Tezari, Argyris N. Stassinakis, Pavlos Paschalis, Maria Gerontidou, Pantelis Karaiskos, Alexandros G. Georgakilas, Helen Mavromichalaki, Ilya G. Usoskin, Norma Crosby, Mark Dierckxsens   +10 more
doaj   +1 more source

Quantum to Classical Transition from the Cosmic Background Radiation [PDF]

, 2000
We have revisited the Ghirardi-Rimini-Weber-Pearle (GRWP) approach for continuous dynamical evolution of the state vector for a macroscopic object. Our main concern is to recover the decoupling of the state vector dynamics for the center-of-mass (CM) and
A. Isar, A. O. Caldeira, A. O. Caldeira, C. Cohen-Tannoudji, C. M. Caves, E. Joos, E. P. Wigner, G. C. Ghirardi, G. C. Ghirardi, G. C. Ghirardi, G. J. Milburn, G. Lindblad, J. Mather, J. von Neumann, K. Blum, L. Diosi, M. C. de Oliveira, M. H. Y. Moussa, M. H. Y. Moussa, M. O. Scully, M. S. Turner, N. G. Almeida, N. Gisin, P. Grigolini, P. Pearle, P. Pearle, S. S. Mizrahi, V. B. Braginsky, W. G. Unruh, W. H. Zurek, W. H. Zurek, W. H. Zurek   +31 more
core   +2 more sources

Capturing Statistical Isotropy Violation with Generalized Isotropic Angular Correlation Functions of Cosmic Microwave Background Anisotropy

The Astrophysical Journal, 2023
The exquisitely measured maps of fluctuations in the cosmic microwave background (CMB) present the possibility of systematically testing the principle of statistical isotropy of the Universe. A systematic approach based on strong mathematical formulation
Dipanshu, Tarun Souradeep, Shriya Hirve
doaj   +1 more source

Submillimeter Spectrum of the Cosmic Background Radiation [PDF]

Highlights of Astronomy, 1988
Recent observations of the spectrum of the 3K cosmic background radiation (CBR) indicate that the CBR spectrum is consistent with a blackbody spectrum of T = 2.74 ±0.02K (Smoot et al. 1987). These measurements, however, were carried out in the Rayleigh-Jeans part of the spectrum, while theories predict spectral distortion in the Wien part.
T. Matsumoto
semanticscholar   +3 more sources

THE COSMIC MICROWAVE BACKGROUND RADIATION* [PDF]

Annals of the New York Academy of Sciences, 1981
Because angular anisotropies and spectral distortions of the cosmic microwave background radiation are judged to be inevitable at some level, in a realistic cosmological model, the evidence for spectral distortions and its theoretical implications are described.
openaire   +2 more sources

Comment on "On the Origin of the Highest Energy Cosmic Rays" [PDF]

, 1998
We show that the photodisintegration of heavy cosmic ray nuclei with energies above 10^20 eV is dominated by interactions with photons from the cosmic microwave background radiation, rather than from infrared ones.
E. Roulet, F. W. Stecker, J. L. Puget, L. N. Epele, M. A. Malkan   +4 more
core   +2 more sources

Simons Observatory: Characterization of the Large Aperture Telescope Receiver

The Astrophysical Journal Supplement Series
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that currently consists of three 0.42 m small-aperture telescopes and one 6 m large-aperture telescope (LAT), located at an elevation of 5200 m in the ...
Tanay Bhandarkar, Saianeesh K. Haridas, Jeff Iuliano, Anna Kofman, Alex Manduca, Karen Perez Sarmiento, John Orlowski-Scherer, Thomas P. Satterthwaite, Yuhan Wang, Zeeshan Ahmed, Jason E. Austermann, Kyuyoung Bae, Gabriele Coppi, Mark J. Devlin, Simon R Dicker, Peter N. Dow, Shannon M. Duff, Daniel Dutcher, Nicholas Galitzki, Jon E. Gudmundsson, Shawn W. Henderson, Johannes Hubmayr, Bradley R. Johnson, Matthew A. Koc, Brian J. Koopman, Michele Limon, Michael J Link, Tammy J. Lucas, Jenna E. Moore, Federico Nati, Michael D. Niemack, Carlos E. Sierra, Max Silva-Feaver, Robinjeet Singh, Rita F. Sonka, Suzanne T. Staggs, Robert J. Thornton, Tran Tsan, Jeff L. Van Lanen, Eve M. Vavagiakis, Michael R Vissers, Liam Walters, Mario Zannoni, Kaiwen Zheng   +43 more
doaj   +1 more source

On parton distributions in a photon gas

, 2009
In some cases it may be useful to know parton distributions in a photon gas. This may be relevant, e.g., for the analysis of interactions of high energy cosmic ray particles with the cosmic microwave background radiation.
A. Ringwald, C. Amsler, D. Seckel, D.J. Fixsen, E. Witten, E.C. Titchmarsh, F.E. Close, G. Barenboim, G.T. Zatsepin, I. Alikhanov, I. Alikhanov, J.C. D’Olivo, K. Greisen, L.D. Landau, M. Glück, M. Krawczyk, P. Aurenche, P. Bhattacharjee, P. Gondolo, R. Nisius, R.L. Kingsley, R.P. Feynman, S. Weinberg, S.J. Brodsky, T.F. Walsh, T.F. Walsh, W. Greiner, W. Slominski   +27 more
core   +1 more source

Unlock the Walnut: How a Pectin‐Rich Suture Tissue and Moisture‐Driven Crack Formation Induce Shell Splitting and Facilitate Seed Germination

Advanced Functional Materials, EarlyView.
Walnut seeds are enclosed in a remarkably strong shell made of sclerenchyma, separated by a pectin‐rich suture tissue. Different cell shapes and chemical composition of this tissue point to an opening mechanism, which is triggered by cyclic humidity changes.
Sebastian J. Antreich, Nannan Xiao, Martin Felhofer, Notburga Gierlinger   +3 more
wiley   +1 more source

On the (Higher Multipoles) Variance Asymmetry in the Cosmic Microwave Background

The Astrophysical Journal
We have studied the cosmic microwave background (CMB) map looking for features beyond cosmological isotropy. We began by tiling the CMB variance maps (which are produced by different smoothing scales) with stripes of different sizes along the most ...
MohammadHossein Jamshidi, Abdolali Banihashemi, Nima Khosravi   +2 more
doaj   +1 more source