Results 41 to 50 of about 412,293 (160)

THE COSMIC MICROWAVE BACKGROUND RADIATION* [PDF]

open access: yesAnnals 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   +1 more source

Background Radiation Exposure in Transylvania, Romania: Environmental and Seasonal Influences

open access: yesApplied Sciences
Background: Environmental ionizing radiation plays a major role in human radiation exposure. Natural background radiation originates from the Earth’s crust and outer space.
Juliánna Szakács   +4 more
doaj   +1 more source

The cosmic microwave background radiation

open access: yesPhysics Reports, 2000
We summarize the theoretical and observational status of the study of the Cosmic Microwave Background radiation. Its thermodynamic spectrum is a robust prediction of the Hot Big Bang cosmology and has been confirmed observationally. There are now 76 observations of Cosmic Microwave Background anisotropy, which we present in a table with references.
Gawiser, Eric, Silk, Joseph
openaire   +2 more sources

Electromagnetic Wave Collapse in a Radiation Background

open access: yesPhysical Review Letters, 2003
The nonlinear interaction, due to quantum electrodynamical (QED) effects, between an electromagnetic pulse and a radiation background is investigated, by combining the methods of radiation hydrodynamics with the QED theory for photon-photon scattering.
Marklund, Mattias   +2 more
openaire   +3 more sources

OUTDOOR GAMMA RADIATION MEASURMENT IN ORDER TO ESTIMATE THE ANNUAL EFFECTIVE DOSE AND EXCESS LIFETIME CANCER RISK FOR RESIDENTS OF TEHRAN, IRAN

open access: yesJournal of Air Pollution and Health, 2017
Introduction: Gamma ray radiation can cause ionization and harmful effects on human health due to its high levels of energy. However, contrary to popular belief, natural sources of gamma radiation are far greater in number than artificial sources.
Akbar Eslami   +4 more
doaj  

Fast Simulation Study of Muon Absorption Radiography Based on Energy Loss Calculation

open access: yesYuanzineng kexue jishu, 2022
Using natural cosmic ray muon as radiation source, muon absorption radiography can realize nondestructive detection of large-scale geological objects. Simulation analysis is an important step in the application of muon absorption radiography.
DING Wenwan;LIU Yuanyuan;WANG Li;SU Ning;CHENG Jianping;HAN Jianwu;ZHEN Gang
doaj  

Quantum limitations of distant radiating objects detection

open access: yesФизика волновых процессов и радиотехнические системы, 2014
Weak electromagnetic signals from sufficiently distant sources reveal quantum properties. The latter ones result that detection of the sources becomes probabilistic.
A.L. Kurakin
doaj  

Comparative study between radiation exposure in common urological procedures

open access: yesBeni-Suef University Journal of Basic and Applied Sciences
Background Fluoroscopy has become essential to urological surgery since advancement of endourology. Fluoroscopy use has increased, placing urologists as well as staff members at risk for occupational radiation exposure and related dangers.
Akrm A. Elmarakbi   +3 more
doaj   +1 more source

RADIATION SAFETY OF BULGARIA IN THE CONTEMPORARY INTERNATIONAL SITUATION

open access: yesSecurity and Defence Quarterly, 2016
It is known that everything on our planet is subjected to constant exposure from the natural and anthropogenic, earth and space SIR, and is situated in conditions created by natural and technical radioactive Backlight.
Nikolay Todorov DOLCHINKOV
doaj   +1 more source

Entropy-Based Characterization of Internet Background Radiation

open access: yesEntropy, 2014
Network security requires real-time monitoring of network traffic in order to detect new and unexpected attacks. Attack detection methods based on deep packet inspection are time consuming and costly, due to their high computational demands.
Félix Iglesias, Tanja Zseby
doaj   +1 more source

Home - About - Disclaimer - Privacy