Results 71 to 80 of about 7,404,600 (175)

The Extragalactic Background Radiation —1989 [PDF]

Symposium - International Astronomical Union, 1990
This symposium has brought back many happy memories of the time 20 years ago when Rashid Sunyaev and I surveyed what was known about the extragalactic background radiation at that time. In one of our papers of 1969, we published a simple representation of the extragalactic background radiation spectrum, as it was known then (Figure 1).
openaire   +1 more source

Comparative study between radiation exposure in common urological procedures

Beni-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, Ali Korany Elnoiry, Nashaat Deiab, Amr M. Lotfy   +3 more
doaj   +1 more source

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
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Cold season dose rate contributions from gamma, radon, thoron or progeny in legacy mines with high natural background radiation. [PDF]

Radiat Prot Dosimetry, 2023
Haanes H, Dahlgren S, Rudjord AL.
europepmc   +1 more source

Lutetium background radiation in total-body PET-A simulation study on opportunities and challenges in PET attenuation correction. [PDF]

Front Nucl Med, 2022
Omidvari N, Cheng L, Leung EK, Abdelhafez YG, Badawi RD, Ma T, Qi J, Cherry SR.   +7 more
europepmc   +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

Impact of Interacting Parameters on Dark Matter in an Interacting Dark Energy Model

The Astrophysical Journal Supplement Series
This paper investigates a dark energy model within the Friedmann–Lemaître–Robertson–Walker cosmological framework, considering both interacting and noninteracting scenarios.
Himanshu Chaudhary, Ritika Nagpal, S. K. J. Pacif, G. Mustafa   +3 more
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A Measurement of Atmospheric Circular Polarization with POLARBEAR

The Astrophysical Journal
At millimeter wavelengths, the atmospheric emission is circularly polarized owing to the Zeeman splitting of molecular oxygen by the Earth's magnetic field.
Takuro Fujino, Satoru Takakura, Shahed Shayan Arani, Darcy Barron, Carlo Baccigalupi, Yuji Chinone, Josquin Errard, Giulio Fabbian, Chang Feng, Nils W. Halverson, Masaya Hasegawa, Masashi Hazumi, Oliver Jeong, Daisuke Kaneko, Brian Keating, Akito Kusaka, Adrian Lee, Tomotake Matsumura, Lucio Piccirillo, Christian L. Reichardt, Kana Sakaguri, Praween Siritanasak, Kyohei Yamada   +22 more
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Heavy Metal Assessments of Soil Samples from a High Natural Background Radiation Area, Indonesia. [PDF]

Toxics, 2022
Nugraha ED, Mellawati J, Wahyudi, Kranrod C, Makhsun, Tazoe H, Ahmad H, Hosoda M, Akata N, Tokonami S.   +9 more
europepmc   +1 more source

A Glance at the Errors of Some Studies on the Health Effects of High Background Natural Radiation Areas

Journal of Biomedical Physics and Engineering, 2019
There is no place on the Earth, the planet we live on, where the natural background radiation level is zero. Since the birth and even in our fetal stage, we have been exposed to different sources of natural radiation.
Eslami J., Mortazavi S. M. J., Mortazavi S. A. R.   +2 more
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