Results 81 to 90 of about 61,701 (212)
, 2020 In a metaphorical reference to the classical “black-body’s question” in the 19th century Physics, I problematize, in this essay, the reality of black people in the areas of Physics and Astronomy in contemporary Brazil, undertaking a theoretical-critical ...
A. Alves-Brito
semanticscholar +1 more source
Quasi‐Constant Time Gap in Multiple Rings of Elves
Earth and Space Science, Volume 12, Issue 10, October 2025.Abstract We present evidence that the time delay between the multiple rings of elves is not caused by the ground reflection of the electromagnetic pulse produced by intracloud lightning. To investigate temporal differences of multi‐elves, we analyzed data from four storms occurring at various times and distances from the Pierre Auger Observatory in ...
The Pierre Auger Collaboration
wiley +1 more source
, 2016 Durante los equinoccios, la secuencia temporal de las sombras proyectadas por cada uno de los puntos que forman cualquier objeto sigue una línea recta de oeste a este. Una construcción simple con hilos y un gnomon puede ser utilizada para materializar el
Gangui, Alejandro
core
On the stellar content of the open clusters Melotte 105, Hogg 15, pismis 21 and Ruprecht 140 [PDF]
, 2001 CCD observations in the B, V and I passbands have been used to generate colour-magnitude diagrams reaching down to V = 19 mag for two slightly characterized (Melotte 105 and Hogg 15) and two almost unstudied (Pismis 21 and Ruprecht 140) open clusters ...
Claria Olmedo, Juan Jose +1 more
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Measurement of CFHT Images I: Identification, Photometry and Classification [PDF]
, 2014 In this paper we present preliminary results from the measurement and analysis of imag es of the ecliptic zoneobtained with MegaCam at Canada-France-Hawaii Telescope (CFHT) located a t Mauna Kea(Hawaii ).
Bustos Fierro, Iván Heriberto +1 more
core +2 more sources
Influence of the surface band structure on electron emission spectra from metal surfaces [PDF]
, 2014 Electron distributions produced by grazing impact of fast protons on Mg(0001), Cu(111), Ag(111), and Au(111) surfaces are investigated, focusing on the effects of the electronic band structure.
Archubi, Claudio Darío +3 more
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ENERGY &ENVIRONMENTAL MATERIALS, Volume 8, Issue 5, September 2025.In the context of Li metal batteries, gel polymer electrolytes (GPEs) offer enhanced cell safety and the optimum compromise between mechanical and electrochemical properties. A thiol‐ene approach to the GPE production was employed, evaluating the effect of two different crosslinkers, as well as the crosslinking environment and the production method ...
Mattia Longo +7 more
wiley +1 more source
Physical parameters in circumnuclear star forming regions [PDF]
, 2008 This is an electronic version of an article published in Revista Mexicana de Astronomía y Astrofísica. Hägele, G.E. et al. Physical parameters in circumnuclear star forming regions.
Cardaci, M.V. +5 more
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Nuevas estrategias de enseñanza: unidades didácticas basadas en temas de la Astronomía Cultural [PDF]
, 2023 Fernando Karaseur +3 more
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Aplicativos móveis e o ensino de astronomia
, 2020 Este artigo discorre sobre os temas tecnologias digitais e ensino de astronomia e tem como objetivos, descrever parcialmente um experimento realizado em uma instituição federal de ensino do interior de Minas Gerais, envolvendo 40 estudantes do ensino ...
Cleonir Coelho Simões, M. R. Voelzke
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