Results 11 to 20 of about 140 (97)

A numerical model to investigate the polarisation azimuth of ULF waves through an ionosphere with oblique magnetic fields [PDF]

open access: yesAnnales Geophysicae, 2005
A one dimensional, computational model for the propagation of ultra low frequency (ULF; 1-100 mHz) wave fields from the Earth's magnetosphere through the ionosphere, atmosphere and into the ground is presented.
M. D. Sciffer, C. L. Waters, F. W. Menk
doaj   +1 more source

Factors determining spectral width of HF echoes from high latitudes [PDF]

open access: yesAnnales Geophysicae, 2007
Spectral width is one of the standard data types produced by the Super Dual Auroral Radar Network (SuperDARN). A pronounced latitudinal gradient in spectral width has been reported in the literature and is used as an empirical proxy for the ...
P. V. Ponomarenko   +2 more
doaj   +1 more source

Modeling Approaches for Gain, Noise and Time Response of Avalanche Photodiodes for X-Rays Detection

open access: yesFrontiers in Physics, 2022
We report on a suite of modeling approaches for the optimization of Avalanche Photodiodes for X-rays detection. Gain and excess noise are computed efficiently using a non-local/history dependent model that has been validated against full-band Monte Carlo
A. Pilotto   +21 more
doaj   +1 more source

Propagation of ULF waves through the ionosphere: Inductive effect for oblique magnetic fields [PDF]

open access: yesAnnales Geophysicae, 2004
Solutions for ultra-low frequency (ULF) wave fields in the frequency range 1–100mHz that interact with the Earth's ionosphere in the presence of oblique background magnetic fields are described.
M. D. Sciffer, C. L. Waters, F. W. Menk
doaj   +1 more source

Pc3-4 ULF waves observed by the SuperDARN TIGER radar [PDF]

open access: yesAnnales Geophysicae, 2005
Despite extensive research, the mechanisms for propagation of Pc3-4 energy from the generation region at the bow shock to the high-latitude ionosphere remain unresolved.
P. V. Ponomarenko   +5 more
doaj   +1 more source

Desejo de reconhecimento: beleza americana à luz de Hegel

open access: yesGriot: Revista de Filosofia, 2018
Este artigo pretende fazer uma leitura do filme Beleza Americana utilizando-se da filosofia hegeliana, mais especificamente, da assim chamada dialética do senhor e do escravo.
Tomas Farcic Menk
doaj   +1 more source

PEPI Lab: a flexible compact multi-modal setup for X-ray phase-contrast and spectral imaging

open access: yesScientific Reports, 2023
This paper presents a new flexible compact multi-modal imaging setup referred to as PEPI (Photon-counting Edge-illumination Phase-contrast imaging) Lab, which is based on the edge-illumination (EI) technique and a chromatic detector.
Luca Brombal   +4 more
doaj   +1 more source

Tumor hypoxia is associated with resistance to PD-1 blockade in squamous cell carcinoma of the head and neck

open access: yesJournal for ImmunoTherapy of Cancer, 2021
The majority of patients with recurrent/metastatic squamous cell carcinoma of the head and neck (HNSCC) (R/M) do not benefit from anti-PD-1 therapy. Hypoxia induced immunosuppression may be a barrier to immunotherapy. Therefore, we examined the metabolic
Greg M Delgoffe   +6 more
doaj   +1 more source

Dynamic thromboembolic left ventricular outflow tract obstruction after aggressive procoagulant treatment in hemorrhagic shock: a case report

open access: yesJournal of Medical Case Reports, 2021
Background In cases of hypertrophic obstructive cardiomyopathy (HOCM), the systolic anterior motion of the mitral valve apparatus results in an obstruction of the left ventricular outflow tract (LVOT), which is known as the SAM [systolic anterior motion]
Vladimir Skrypnikov   +4 more
doaj   +1 more source

The association between cognition and academic performance in Ugandan children surviving malaria with neurological involvement. [PDF]

open access: yesPLoS ONE, 2013
The contribution of different cognitive abilities to academic performance in children surviving cerebral insult can guide the choice of interventions to improve cognitive and academic outcomes.
Paul Bangirana   +4 more
doaj   +1 more source

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