Results 11 to 20 of about 493,079 (334)

Assessment of Nuclear Moisture Density Gauges at a Secondary Standard Dosimetry Laboratory in Ghana during December 2015–December 2017 [PDF]

Iranian Journal of Medical Physics, 2020
Introduction: Nuclear moisture density gauges are widely used in construction industry in different countries across the world, including Ghana, on a large scale.
John Owusu-Banahene, Prince Appiah, Daniel Adjei, Benjamin Gbekor, Collins Azah, Paul Amoah, Joseph Amoako, Emmanuel Darko, Godfred Asiedu, Philip Owusu-Manteaw   +9 more
doaj   +1 more source

Expanded and combined uncertainty in measurements by GM counters [PDF]

Nuclear Technology and Radiation Protection, 2007
This paper deals with possible ways of obtaining expanded and combined uncertainty in measurements for four types of GM counters with a same counter’s tube, in cases when the contributors of these uncertainties are cosmic background radiation and induced
Stanković Koviljka, Aranđić Danijela, Lazarević Đorđe, Osmokrović Predrag   +3 more
doaj   +1 more source

Dependence of cosmic ray component in background of atmosphere surface from solar magnetic activity

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2021
Using Geant4 toolkit the changes of the flux density and of the dose rates of the secondary cosmic radiation at the heights up to 50 m from the land surface (at a depth of atmosphere about 1030 g/cm²) and depending on solar magnetic activity were ...
Zelinskiy, A.S., Yakovlev, G.A.
doaj   +1 more source

The Microwave Background Radiation [PDF]

Symposium - International Astronomical Union, 1990
We review the data on the spectrum and isotropy of the microwave background radiation and the astrophysical processes that may produce spectral distortions and anisotropies. As yet no fully satisfactory explanation has been found for the submillimeter excess observed by Matsumotoet al.(1988).
DEZOTTI G, Danese, Luigi, TOFFOLATTI L, FRANCESCHINI A.   +3 more
openaire   +3 more sources

AAPM Task Group 298: Recommendations on certificate program/alternative pathway candidate education and training

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Entry into the field of clinical medical physics is most commonly accomplished through the completion of a Commission on Accreditation of Medical Physics Educational Programs (CAMPEP)‐accredited graduate and residency program. To allow a mechanism to bring valuable expertise from other disciplines into clinical practice in medical physics, an “
Joann I. Prisciandaro, Jay W. Burmeister, Paul M. DeLuca Jr, Bruce J. Gerbi, Maryellen L. Giger, James L. Robar, J. Anthony Seibert   +6 more
wiley   +1 more source

Level of natural radiation in the closed space of the public schools in Hamadan, Iran (2015-2016) [PDF]

Journal of Advances in Environmental Health Research, 2020
Since human beings are constantly exposed to environmentalionizing radiations, the measurement of natural background radiations is of utmost importance.
Mohamad Taghi Samadi, Bahman GolzarKhojasteh, Maryam GolzarKhojasteh, Salman Khazaei, Ladan Sokhri Mirazizi   +4 more
doaj   +1 more source

Cosmic Background Radiation [PDF]

International Journal of Theoretical Physics, 2015
It is shown that a collection of photons with nearly the same frequency exhibits a “condensation” type of phenomenon corresponding to a peak intensity. The observed cosmic background radiation can be explained from this standpoint. We have obtained analogous results by extremization of the occupation number for photons with the use of the Lambert W ...
Valluri, Sree Ram, Sidharth, B G
openaire   +3 more sources

COMP Report: CPQR technical quality control guidelines for use of positron emission tomography/computed tomography in radiation treatment planning

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein, Mike Oliver, Dan La Russa, John Agapito, Stewart Gaede, JeanPierre Bissonnette, Arman Rahmim, Carlos Uribe   +7 more
wiley   +1 more source

The application of multiple metrics in deformable image registration for target volume delineation of breast tumor bed

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Background and purpose For postoperative breast cancer patients, deformable image registration (DIR) is challenged due to the large deformations and non‐correspondence caused by tumor resection and clip insertion. To deal with it, three metrics (fiducial‐, region‐, and intensity‐based) were jointly used in DIR algorithm for improved accuracy ...
Xin Xie, Yuchun Song, Feng Ye, Hui Yan, Shulian Wang, Xinming Zhao, Jianrong Dai   +6 more
wiley   +1 more source

Polarization of the cosmic background radiation [PDF]

The Astrophysical Journal, 1981
The technique and results of a measurement of the linear polarization of the cosmic background radiation at a wavelength of 9 mm are discussed. Data taken between 1978 May and 1980 February from both the Northern Hemisphere (Berkeley latitude 38 deg N) and the Southern Hemisphere (Lima latitude 12 deg S) over 11 declinations from -37 to +63 deg show ...
Lubin, Philip M., Smoot, George F.
openaire   +6 more sources