Results 161 to 170 of about 21,650,361 (340)

ASCA Sky Survey Observations and the Cosmic X-Ray Background in 2-10 KeV [PDF]

, 1998
H. Inoue, Tadayuki Takahashi, Yoshihiro Ueda, Ayumu Yamashita, Yoshitaka Ishisaki, Yasushi Ogasaka   +5 more
openalex   +1 more source

Electromagnetic vacuum fluctuations around a cosmic string in de Sitter spacetime

, 2017
The electromagnetic field correlators are evaluated around a cosmic string in background of $(D+1)$-dimensional dS spacetime assuming that the field is prepared in the Bunch-Davies vacuum state.
Manukyan, V. F., Saharian, A. A., Saharyan, N. A.   +2 more
core   +1 more source

Economic Rationality and International Humanitarianism: Ryōkichi Sagane's Advocacy Regarding the Introduction of Foreign Nuclear Reactors to Japan**

Berichte zur Wissenschaftsgeschichte, EarlyView.
Abstract The 2011 Fukushima Daiichi Nuclear Power Plant accident underscored the crucial role of nuclear engineering experts. However, the specific arguments and motivations of scientists advocating for the introduction of foreign reactors remain unclear.
Masahiro Inohana
wiley   +1 more source

Invisible Labor and the “Ghost Particle”: Underground Physics at the Kolar Gold Fields**

Berichte zur Wissenschaftsgeschichte, EarlyView.
Abstract When cosmic rays—high‐energy particles from outer space—encounter the Earth's atmosphere, they produce particles called neutrinos. To detect them, physicists go underground inside deep mines where the overlying rock can filter out the cosmic‐ray background radiation.
Nithyanand Rao
wiley   +1 more source

New multivariable capabilities of the INCA program [PDF]

The INteractive Controls Analysis (INCA) program was developed at NASA's Goddard Space Flight Center to provide a user friendly, efficient environment for the design and analysis of control systems, specifically spacecraft control systems.
Bauer, Frank H., Downing, John P., Thorpe, Christopher J.   +2 more
core   +1 more source

One-Dimensional Variational Ionospheric Retrieval Using Radio Occultation Bending Angles:Part 1 -Theory [PDF]

A new one-dimensional variational (1D-Var) retrieval method for ionospheric GNSS radio occultation (GNSS-RO) measurements is described. The forward model implicit in the retrieval calculates the bending angles produced by a one-dimensional ionospheric ...
Culverwell, I. D., Elvidge, S., Healy, S. B.   +2 more
core   +1 more source

The Curious Concept That Almost Nobody Seemed to Care About at First: Virtual Particles in the Post‐War Period**

Berichte zur Wissenschaftsgeschichte, EarlyView.
Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Jean‐Philippe Martinez
wiley   +1 more source

Cosmic Inflation and Genetic Algorithms

Fortschritte der Physik, Volume 71, Issue 1, January 2023., 2023
Abstract Large classes of standard single‐field slow‐roll inflationary models consistent with the required number of e‐folds, the current bounds on the spectral index of scalar perturbations, the tensor‐to‐scalar ratio, and the scale of inflation can be efficiently constructed using genetic algorithms.
Steve A. Abel, Andrei Constantin, Thomas R. Harvey, Andre Lukas   +3 more
wiley   +1 more source

A Composite Seyfert 2 X-Ray Spectrum: Implications for the Origin of the Cosmic X-Ray Background [PDF]

, 2001
Edward C. Moran, L. E. Kay, Marc Davis, A. V. Filippenko, Aaron J. Barth   +4 more
openalex   +1 more source

Study of cosmic rays in the solar environment Final technical report [PDF]

Behavior of cosmic rays in solar environment ...

core   +1 more source