Results 111 to 120 of about 441,564 (317)
Flexible and modular PET: Evaluating the potential of TOF‐DOI panel detectors
Medical Physics, EarlyView.Abstract BackgroundPanel detectors have the potential to provide a flexible, modular approach to Positron Emission Tomography (PET), enabling customization to meet patient‐specific needs and scan objectives. The panel design allows detectors to be positioned close to the patient, aiming to enhance sensitivity and spatial resolution through improved ...
Gašper Razdevšek +9 more
wiley +1 more source
An electronic radiation of blackbody: Cosmic electron background [PDF]
arXiv, 2008 The Universe owns the electronic radiation of blackbody at temperature 2.725 K, which we call the cosmic electron background. We calculate its radiation spectrum. The energy distribution of number density of electrons in the cosmic electron background becomes zero as energy goes to both zero and infinity.
arxiv
A Cosmic Microwave Background Radiation Polarimeter Using Superconducting Bearings
, 2003 Measurements of the polarization of the cosmic microwave background (CMB) radiation are expected to significantly increase our understanding of the early universe.
Hanany, S. +5 more
core +2 more sources
Measurements of the Cosmic Background Radiation [PDF]
, 1986 Maps of the large scale structure (θ>6 °) of the cosmic background radiation covering 90% of the sky are now available. The data show a very strong 50–100 σ (statistical error) dipole component, interpreted as being due to our motion, with a direction of α = 11.25 ± 0.15 hours, δ = -5.6 ± 2.0° The inferred direction of the velocity of our galaxy ...
Philip Lubin, Thyrso Villela
openaire +2 more sources
PROTEOMICS, EarlyView.ABSTRACT Spaceflight poses unique challenges to human health due to exposure to increased levels of cosmic radiation, microgravity, and associated oxidative stress. These environmental factors can lead to cellular damage, inflammation, and a range of health complications, including cardiovascular problems, immune system impairment, and an increased ...
Marilena M. Bourdakou +2 more
wiley +1 more source
Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology
The Astrophysical Journal, 2023 Using the novel semi-numerical code for reionization AMBER, we model the patchy kinetic Sunyaev–Zel’dovich (kSZ) effect by directly specifying the reionization history with the redshift midpoint z _mid , duration Δ _z , and asymmetry A _z .
Nianyi Chen +3 more
doaj +1 more source
Analysis of cosmic microwave background radiation in the presence of Lorentz violation [PDF]
arXiv, 2007 We examine the effects Lorentz violation on observations of cosmic microwave background radiation. In particular, we focus on changes in polarization caused by vacuum birefringence. We place stringent constraints on previously untested violations.
arxiv
Journal of Polymer Science, EarlyView.ABSTRACT Micelles with a patch‐like microphase‐separated (patchy) corona are of increasing interest as their unique corona structure opens various applications, for example, as emulsion stabilizers, blend compatibilizers, nanoparticle templates for catalysis, or hierarchical self‐assembly.
Roman Schaller +3 more
wiley +1 more source
Balloon-Based Measurements of the Cosmic Background Radiation [PDF]
1974 International Conference on Submillimeter Waves and Their Applications, 1974 We have developed and flown a balloon-borne liquid-heliumcooled spectrometer to measure the cosmic background radiation in the 3 -18-cm/sup -1/ region. It features a cooled horn antenna, a polarizing Michelson interferometer, and a germanium bolometer. These design features and the performance of the instrument are discussed.
Mather, John C. +2 more
openaire +2 more sources
Low Background Radiation Detection Techniques and Mitigation of Radioactive Backgrounds
Frontiers of Physics, 2020 The study of rare fundamental physics phenomena, such as double-beta decay, rare nuclear decays and dark matter, requires very low levels of background radiation in order to observe a signal.
M. Laubenstein, I. Lawson
semanticscholar +1 more source