Results 71 to 80 of about 684,399 (308)

Gamma-ray luminosity properties of gamma-ray pulsars [PDF]

open access: yesAstronomy & Astrophysics, 2004
Based on a new self-consistent outer gap model, we statistically study luminosity properties of gamma-ray pulsars with ages of less than or equal to2 x 10(7) yr in the Galaxy as well as those with ages of less than or equal to5 x 10(6) yr in the Gould belt using a Monte Carlo method, where the gamma-ray beaming effect has been included.
L. Zhang, Z. X. Han, Z. J. Jiang
openaire   +1 more source

Gamma rays excited radioluminescence tomographic imaging

open access: yesBioMedical Engineering OnLine, 2018
Background Radionuclide-excited luminescence imaging is an optical radionuclide imaging strategy to reveal the distributions of radioluminescent nanophosphors (RLNPs) inside small animals, which uses radioluminescence emitted from RLNPs when excited by ...
Xuanxuan Zhang   +7 more
doaj   +1 more source

IGF2 knockout reduces but does not abolish osteosarcoma growth in vitro and in vivo

open access: yesFEBS Open Bio, EarlyView.
To test whether endogenous IGF2 promotes osteosarcoma growth, IGF2 was knocked out in Saos2 cells via CRISPR‐Cas9. KO cells showed reduced proliferation in vitro, and knockout xenografts in mice reached only ~25% of wild‐type tumor volume. Insulin‐like growth factor 2 (IGF2) is implicated in osteosarcoma, but direct functional evidence of its role is ...
Shun Yao, Marco Archetti
wiley   +1 more source

Photovoltaic effect produced in silicon solar cells by x-rays and gamma rays

open access: yes, 1960
The open-circuit voltage and photocurrent produced in a silicon solar cell by X- and gamma rays were measured as a function of exposure dose rate, cell temperature, angle of incidence of radiation, and photon energy.
Scharf, Karl
core   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

open access: yesAdvanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice   +2 more
wiley   +1 more source

Observation of Pulsed γ-Rays Above 25 GeV from the Crab Pulsar with MAGIC [PDF]

open access: yes, 2008
One fundamental question about pulsars concerns the mechanism of their pulsed electromagnetic emission. Measuring the high-end region of a pulsar's spectrum would shed light on this question.
E. Fernandez   +495 more
core   +1 more source

An Airborne and Vehicular Gamma Survey of Greenham Common, Newbury District and Surrounding Areas [PDF]

open access: yes, 1997
The airborne gamma ray survey recorded more than 40,000 scintillation spectra and 20,000 spectra from semiconductor detectors. The vehicular survey produced a further 1346 and 763 spectral sets respectively. The installation, calibration, recording and
Sanderson, D.C.W.   +4 more
core   +5 more sources

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar   +2 more
wiley   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran   +6 more
wiley   +1 more source

Neutron/Gamma Mixed Spectrum Radiolysis-based Aqueous Dosimetry [PDF]

open access: yes, 2007
This work develops a method to use an aqueous dosimeter in a mixed radiation field to determine separate measurements of neutron and gamma dose. Based on radiolysis of both Fricke and Methyl Viologen (MV) solutions, activation analysis and reactor ...
Setter, Timothy
core  

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