Results 291 to 300 of about 7,188,407 (346)

Pattern Discovery in Internet Background Radiation

IEEE Transactions on Big Data, 2019
Internet Background Radiation (IBR) is observed in empty network address spaces. No traffic should arrive there, but it does in overwhelming quantities, gathering evidences of attacks, malwares and misconfigurations.
Félix Iglesias, T. Zseby
semanticscholar   +1 more source

A Background to Background Radiation

The Physics Teacher, 2003
The study of radiation at the introductory college level usually includes experiments to determine the half-life of a radioactive isotope and also a study of the absorption of nuclear radiation by metal foils. These experiments are straightforward to do using a Geiger-Müller tube and scaler, and allow for the determination of well-known constants.
openaire   +2 more sources

Background Radiation

2005
Dose units are introduced including absorbed dose, equivalent dose and effective dose. Background radiation is considered, including natural and man-made components. Biological consequences of irradiation are considered, including those from high doses (deterministic effects) and those from low doses based on the deliberately conservative linear, no ...
M.I. Ojovan, W.E. Lee
openaire   +3 more sources

Background Radiation in the Universe [PDF]

Transactions of the International Astronomical Union, 1988
a) Spectrum. A collaboration between US and Italian groups performed accurate observations at five wavelengths. The experiment was particularly conceived to achieve the highest possible relative accuracy, allowing an effective search for spectral distortions. The Berkeley and the Milano groups further improved the spectral coverage.
openaire   +1 more source

A flat Universe from high-resolution maps of the cosmic microwave background radiation

Nature, 2000
The blackbody radiation left over from the Big Bang has been transformed by the expansion of the Universe into the nearly isotropic 2.73 K cosmic microwave background.
P. Bernardis, P. Ade, J. Bock, J. Bond, J. Borrill, A. Boscaleri, K. Coble, B. Crill, G. Gasperis, P. Farese, P. Ferreira, K. Ganga, M. Giacometti, E. Hivon, V. Hristov, A. Iacoangeli, A. Jaffe, A. Lange, L. Martinis, S. Masi, P. Mason, P. Mauskopf, A. Melchiorri, L. Miglio, T. Montroy, C. Netterfield, E. Pascale, F. Piacentini, D. Pogosyan, S. Prunet, S. Rao, G. Romeo, J. Ruhl, F. Scaramuzzi, D. Sforna, N. Vittorio   +35 more
semanticscholar   +1 more source

Cosmic Background Radiation

1976 International Conference on Submillimeter Waves and Their Applications, 1976
The existence of essentially isotropic homogeneous cosmic background radiation with the spectrum of a 3 K blackbody places important limits on cosmological speculations. This radiation has been the subject of intensive experimental investigation for more than a decade.
D. P. Woody, P. L. Richards
openaire   +2 more sources

On the origin of the background radiation

Astrophysics and Space Science, 1975
From the assumption of a universal upper limit for the temperature of about 1012 K which is suggested by the experiences of high energy physics, it follows taking additionally into account the strong interaction between hadrons explicitly that in the earliest stage of the Universe the numbers of nucleon number by a factor of about 107.
Heinz Dehnen, H. Hoenl
openaire   +2 more sources

Radiation in cosmological backgrounds

Journal of Mathematical Physics, 1976
The purpose of this investigation is to find the conditions for characteristic propagation of multipole radiation in Friedmann backgrounds. The radiation fields studied are Klein–Gordon scalar fields, conformally invariant scalar fields, electromagnetic fields, and gravitational fields.
Allen I. Janis, S. C. Chang
openaire   +2 more sources

The cosmic microwave background radiation

Reviews of Modern Physics, 1979
Radio Astronomy has added greatly to our understanding of the structure and dynamics of the universe. The cosmic microwave background radiation, considered a relic of the explosion at the beginning of the universe some 18 billion years ago, is one of the most powerful aids in determining these features of the universe. This paper is about the discovery
openaire   +4 more sources

DarkLight radiation backgrounds

AIP Conference Proceedings, 2013
We report measurements of photon and neutron radiation levels observed while transmitting a 0.43 MW electron beam through millimeter-sized apertures and during beam-on, but accelerating gradient RF-on, operation. These measurements were conducted at the Free-Electron Laser (FEL) facility of the Jefferson National Accelerator Laboratory (JLab) using a ...
N. Kalantarians, null DarkLight Collaboration   +1 more
openaire   +2 more sources