Results 41 to 50 of about 435,129 (349)

The Absorption Coefficient of a Plasma at Radio Frequencies [PDF]

Monthly Notices of the Royal Astronomical Society, 1960
The theory of radiation due to free --free transitions by electrons in a plasma has been the subject of much work. Elwert has given an exact theory for binary electron-ion encounters but there has been doubt about the applicability of the formulae when an electron moves in the field of many ions at comparable distances; it is intended to remove that ...
openaire   +1 more source

Letter to the Editor
UHF electromagnetic emission stimulated by HF pumping of the ionosphere [PDF]

Annales Geophysicae, 2002
UHF electromagnetic emission (with a frequency near 600 MHz) from the F-region of the ionosphere pumped by an HF powerful radio wave is revealed. Possible mechanisms of the emission excitation, such as plasma mode con-version, scattering or Earth ...
S. M. Grach, S. M. Grach, V. M. Fridman, L. M. Lifshits, T. S. Podstrigach, E. N. Sergeev, S. D. Snegirev   +6 more
doaj   +1 more source

Chitosan–Hydroxyapatite Composite Layers Generated in Radio Frequency Magnetron Sputtering Discharge: From Plasma to Structural and Morphological Analysis of Layers

Polymers, 2020
Chitosan–hydroxyapatite composite layers were deposited on Si substrates in radio frequency magnetron sputtering discharges. The plasma parameters calculated from the current–voltage radio frequency-compensated Langmuir probe characteristics indicate a ...
D. Dreghici, B. Butoi, D. Predoi, S. Iconaru, O. Stoican, A. Groza   +5 more
semanticscholar   +1 more source

Properties of Saturn kilometric radiation measured within its source region [PDF]

, 2010
On 17 October 2008, the Cassini spacecraft crossed the southern sources of Saturn kilometric radiation (SKR), while flying along high-latitude nightside magnetic field lines.
L. Lamy, André, N., Andre, N, Lamy, L., Coates, AJ, Gurnett, D.A., B. Cecconi, C. S. Arridge, W. S. Kurth, P. Louarn, Dougherty, MK, Kurth, WS, R. L. Mutel, A. J. Coates, Schippers, P., Arridge, C. S., Mutel, R.L., Kurth, W.S., Zarka, P., D. A. Gurnett, Gurnett, D. A., M. K. Dougherty, Lamy, L, Schippers, P, Zarka, P, P. Zarka, Coates, Andrew J., Coates, A. J., Cecconi, B., Arridge, CS, Mutel, RL, Dougherty, M. K., P. Schippers, N. André, Dougherty, M.K., Louarn, P., Cecconi, B, Louarn, P, Kurth, W. S., Gurnett, DA, Arridge, Chris S., Mutel, R. L.   +41 more
core   +1 more source

Interaction of radio frequency waves with cylindrical density filaments -- scattering and radiation pressure [PDF]

, 2021
Submitted for publication in Journal of Plasma PhysicsThe propagation of radio frequency (RF) waves in tokamaks can be affected by filamentary structures, or blobs, that are present in the edge plasma and the scrape-off layer.
Hizanidi, Kyriakos, Valvis, Spyridon I., Ram, Abhay K.   +2 more
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Effects on the Surface and Luminescence Properties of GaAs by SF6 Plasma Passivation

Crystals, 2018
The passivation effects of the SF6 plasma on a GaAs surface has been investigated by using the radio frequency (RF) plasma method. The RF’s power, chamber pressure, and plasma treatment time are optimized by photoluminescence (PL), atomic force ...
Yumeng Xu, Xin Gao, Xiaolei Zhang, Zhongliang Qiao, Jing Zhang, Lu Zhou, Baoxue Bo   +6 more
doaj   +1 more source

Modeling of plasma transport and negative ion extraction in a magnetized radio-frequency plasma source

, 2017
Negative ion sources for fusion are high densities plasma sources in large discharge volumes. There are many challenges in the modeling of these sources, due to numerical constraints associated with the high plasma density, to the coupling between plasma
G. Fubiani, L. Garrigues, G. Hagelaar, N. Kohen, J. Boeuf   +4 more
semanticscholar   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Development of an uncompensated diagnostic for the measurement of phase-resolved characteristics in radio-frequency plasmas [PDF]

, 2007
In recent years, plasma technology has found its way into a wide and diveme array of manufacturing techniques and facilities, ranging from biomedical applications to microprocessor fabrication.
Linnane, Shane
core