Results 361 to 370 of about 638,354 (389)

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.
openaire   +2 more sources

Gamma Ray Sources and Techniques for Gamma Ray Radiology [PDF]

, 1953
J. J. Hirschfield, D. T. O'Connor, D. Polansky   +2 more
openaire   +1 more source

American Cancer Society nutrition and physical activity guideline for cancer survivors

Ca-A Cancer Journal for Clinicians, 2022
Cheryl L Rock, Cynthia A Thomson, Marian L Neuhouser   +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 Chih-Yi Sun   +2 more
exaly  

Compact stellar X-ray sources

, 2006
W. Lewin, M. Klis
semanticscholar   +1 more source

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 ...
openaire   +2 more sources

Spacecraft Navigation Using Celestial Gamma-Ray Sources

, 2015
Chuck S. Hisamoto, S. Sheikh
semanticscholar   +1 more source

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 ...
openaire   +2 more sources

Flexible self-charging power sources

Nature Reviews Materials, 2022
Ruiyuan Liu, Zhong Lin Wang, Kenjiro Fukuda   +2 more
exaly  

“Gamma — Ray Sources in our Galaxy”

1987
Astronomy with gamma-rays in the tens of MeV-few GeV energy region was started in the sixties, with the availability of reasonable space vehicles, in the hope of opening a new window of observational astronomy which was to shed new “light” on a variety of energetic astrophisical processes in compact objects as well as in the interstellar medium (ISM).
openaire   +2 more sources