Results 41 to 50 of about 9,496 (196)

Magnetic excitations of perovskite rare-earth nickelates: RNiO$_3$ [PDF]

open access: yes, 2015
The perovskite nickelates RNiO$_3$ (R: rare-earth) have been studied as potential multiferroic compounds. A certain degree of charge disproportionation in the Ni ions has been confirmed by high resolution synchrotron power diffraction: instead of the ...
Buitrago, Ivon R., Ventura, Cecilia I.
core   +2 more sources

Cosmic Ray Counting Variability From Water‐Cherenkov Detectors as a Proxy of Stratospheric Conditions in Antarctica

open access: yesEarth and Space Science, Volume 12, Issue 11, November 2025.
Abstract This work examines atmospheric effects on cosmic ray counts observed by a Water‐Cherenkov detector at the Argentine Antarctic Marambio Station. We analyze the influence of ground‐level barometric pressure and geopotential height at various pressure levels on daily particle rates, finding the strongest association at 100 hPa, linked to ...
N. A. Santos   +7 more
wiley   +1 more source

Avatares de la energía nuclear en Argentina. Análisis y contextualización del Plan Nuclear de 1979

open access: yesH-Industri@, 2014
El presente artículo tiene por objetivo analizar el Plan Nuclear de 1979 en relación con el contexto histórico e ideológico en que se desarrolló. Su estudio reviste especial interés en tanto que la actitud del gobierno auto-denominado “Proceso de ...
Milagros Rodríguez
doaj  

A search for point sources of EeV photons

open access: yes, 2014
Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky.
Aab, A.   +485 more
core   +2 more sources

Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy [PDF]

open access: yes, 2016
We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8 \pm 0.7 (stat) \pm 6.
Aab, Alexander   +449 more
core   +2 more sources

Quasi‐Constant Time Gap in Multiple Rings of Elves

open access: yesEarth 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

Adverse impact of acute Toxoplasma gondii infection on human spermatozoa

open access: yesThe FEBS Journal, Volume 292, Issue 17, Page 4720-4736, September 2025.
Toxoplasma gondii tachyzoites injected intraperitoneally crossed the blood‐testes barrier, appearing in testes/epididymis by day 6 post‐infection. In vitro exposure caused increased sperm necrosis/apoptosis and structural damage to heads/tails. Immunofluorescence and SEM revealed tachyzoites attaching to sperm tails, inducing twisting/detachment, and ...
Lisbeth Rojas‐Barón   +11 more
wiley   +1 more source

DESARROLLO DE UN ESPECTRÓMETRO POR MOVILIDAD IÓNICA PARA LA DETECCIÓN DE COMPUESTOS ORGÁNICOS (EXPLOSIVOS, DROGAS Y CONTAMINANTES)

open access: yesAnales (Asociación Física Argentina), 2008
En este trabajo se presenta el desarrollo de un IMS (Ion Mobility Spectrometer) caracterizado por contar con la aplicación de un campo eléctrico perpendicular al flujo de iones generados mediante una descarga tipo corona.
N. G. Boggio   +5 more
doaj  

Measurement of the cosmic ray spectrum above $4{\times}10^{18}$ eV using inclined events detected with the Pierre Auger Observatory

open access: yes, 2015
A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 ...
Aab, Alexander   +463 more
core   +1 more source

Structure and magnetism of orthorhombic epitaxial FeMnAs [PDF]

open access: yes, 2013
The molecular beam epitaxy growth of Fe on MnAs/GaAs(001) leads to the formation of an epitaxial FeMnAs phase at the Fe/MnAs interface. The investigation of the structure by high angle annular dark field imaging in a scanning transmission electron ...
Demaille, Dominique   +7 more
core   +3 more sources

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