Results 291 to 300 of about 25,883 (316)

Acceleration of particles in Gamma Ray sources: Blazars and Gamma Ray Bursts

AIP Conference Proceedings, 2001
The objectives of my talk are to indicate the requirements for particle acceleration for both electrodynamic models and hadronic models in blazars, then to propose a relativistic Fermi acceleration process to achieve the goal of UHE Cosmic Ray production in relativistic flows.
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VHE and UHE Gamma Ray Sources [PDF]

, 1991
The observations of Very High Energy, VHE, and Ultra High Energy, UHE, gamma rays from celestial sources are reviewed. Cerenkov detectors for VHE gamma ray measurements and extended air shower arrays for UHE measurements are described. The x-ray binary pulsar source VHE and UHE observations of Cyg X-3, Her X-1, Vela X-1 and Cen X-3 and of the radio ...
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Gamma Ray Sources and Techniques for Gamma Ray Radiology [PDF]

, 1953
J. J. Hirschfield, D. T. O'Connor, D. Polansky   +2 more
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An overview of real‐world data sources for oncology and considerations for research

Ca-A Cancer Journal for Clinicians, 2022
Lynne T Penberthy, Melissa A Bruno, Anne-marie Meyer   +2 more
exaly  

American Cancer Society nutrition and physical activity guideline for cancer survivors

Ca-A Cancer Journal for Clinicians, 2022
Tracy E Crane, Marjorie L Mccullough, Cheryl L Rock   +2 more
exaly  

Racial and socioeconomic disparities in lung cancer screening in the United States: A systematic review

Ca-A Cancer Journal for Clinicians, 2021
Ernesto Sosa, Dan J Raz, Virginia Sun
exaly  

Outdoor air pollution and cancer: An overview of the current evidence and public health recommendations

Ca-A Cancer Journal for Clinicians, 2020
Andrea A Baccarelli, Diddier Prada, George Thurston   +2 more
exaly  

X-Ray and Gamma Ray Sources

1992
The ubiquitous nature of cosmic X-ray sources was not fully realized until satellites such as Uhuru, Ariel, HEAO and Einstein surveyed the X-ray sky. For instance, the fourth Uhuru (the Swahili word for freedom) catalogue contains 339 X-ray sources in the photon energy range 2 to 6 keV (1 keV = 103 eV = 1.6 × 109erg), while one HEAO (High Energy ...
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Unidentified Gamma-Ray Sources: An Introduction

2001
What makes a gamma-ray source “unidentified”? Typical gamma-ray source error boxes are large by astronomical standards; therefore a positional correlation with a known object is usually not enough to identify a source. Historically, identifications have come in several ways: (1) finding a time-variable signal seen at another wavelength; (2) repeatedly ...
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Key issues surrounding the health impacts of electronic nicotine delivery systems (ENDS) and other sources of nicotine

Ca-A Cancer Journal for Clinicians, 2017
Zachary Cahn, Alex C Liber, Michal Stoklosa   +2 more
exaly