Results 111 to 120 of about 1,300,084 (347)
Introduction to Astronomy with Radioactivity
, 2010 In the late nineteenth century, Antoine Henri Becquerel discovered radioactivity and thus the physics of weak interactions, well before atomic and quantum physics was known.
Diehl, Roland
core +1 more source
Artificial Intelligences: A Bridge Toward Diverse Intelligence and Humanity's Future
Advanced Intelligent Systems, EarlyView.Many discussions of artificial intelligence fail to address deeper questions being raised by advances in developmental biology, neuroscience, bioengineering, and philosophy of mind. Novel beings, including technologically and biologically augmented humans, engineered life forms, hybrots, and others, require tools of the emerging field of diverse ...
Michael Levin
wiley +1 more source
Angewandte Chemie, EarlyView.Ein neuer Bildungsweg für polyzyklische aromatische Stickstoffheterozyklen (PANH) wurde gefunden. Die Reaktion von Phenylnitren mit dem Propargylradikal führt zu Chinolin und belegt, dass Nitrene geeignete Vorläufer zum Einbau von Stickstoffheteroatomen sind.
Rahel Arns +6 more
wiley +1 more source
Cosmic particles with energies above 10^19 eV: a brief review of results
, 2013 Experimental results on ultra-high-energy cosmic rays are briefly reviewed and their interpretation is discussed. The results related to principal observables (arrival directions, energies and composition) of primary particles of extended air showers as ...
Troitsky, Sergey
core +1 more source
Angewandte Chemie International Edition, EarlyView.Natural combinatorics: Evolutionary mixing and matching of three cyanobacterial biosynthetic gene clusters resulted in the emergence of minutumamides, a novel family of peptide‐polyketide hybrids. Retro‐evolutionary analysis led to the discovery of nostopeptolide KVJ3, an evolutionary ancestor that links nostopeptolide and minutumamide biosynthesis and
Keishi Ishida +6 more
wiley +1 more source
Estimation of Radiation Exposure for Various Flights from Athens International Airport
AtmosphereIn recent decades, the exposure of aviation crews and passengers to cosmic radiation has been progressively increasing due to the growing need of flights.
Anastasia Tezari +9 more
doaj +1 more source
Some Current Theoretical Issues around Ultra-High Energy Cosmic Rays [PDF]
Acta Phys.Polon. B35 (2004) 1845-1862, 2004 We address some current theoretical issues around ultra-high energy cosmic rays. We recall that scenarios producing more gamma-rays than cosmic rays up to high redshift can in general only provide a sub-dominant contribution to the ultra-high energy cosmic ray flux. This includes extra-galactic top-down and the Z-burst scenarios. Finally we discuss the
arxiv
Is Phenylnitrene a Missing Link in the Formation of Polycyclic Aromatic Nitrogen Heterocycles?
Angewandte Chemie International Edition, EarlyView.A new formation pathway for polycyclic aromatic nitrogen heterocycles (PANHs) has been found. The reaction of phenylnitrene and the propargyl radical leads to quinoline, proving that nitrenes are suitable precursors for nitrogen incorporation mechanisms.
Rahel Arns +6 more
wiley +1 more source
The soft X-ray sky survey data are combined with the results from the UXT sounding rocket payload. Very strong constraints can then be placed on models of the origin of the soft diffuse background.
Cox, D. P. +3 more
core +4 more sources
Probing the BSM physics with CMB precision cosmology: an application to supersymmetry
Journal of High Energy Physics, 2018 The cosmic history before the BBN is highly determined by the physics that operates beyond the Standard Model (BSM) of particle physics and it is poorly constrained observationally.
Ioannis Dalianis, Yuki Watanabe
doaj +1 more source