Results 61 to 70 of about 1,149,119 (338)

Predicting the Effects of Solar Storms on the Ionosphere Based on a Comparison of Real-Time Solar Wind Data with the Best-Fitting Historical Storm Event

Atmosphere, 2021
This study presents a new modeling approach that aims for long time predictions (more than 12 h) of ionospheric disturbances driven by solar storm events.
Erik Schmölter, Jens Berdermann
doaj   +1 more source

Regional reference total electron content model over Japan based on neural network mapping techniques [PDF]

, 2007
A regional reference model of total electron content (TEC) was constructed using data from the GPS Earth Observation Network (GEONET), which consists of more than 1000 Global Positioning System (GPS) satellite receivers distributed over Japan.
T. Maruyama
core   +3 more sources

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Reconstruction of F2 layer peak electron density based on operational vertical total electron content maps [PDF]

Annales Geophysicae, 2013
Electron density is the major determining parameter of the ionosphere. Especially the maximum electron density of the F2 layer in the ionosphere, NmF2, is of particular interest with regard to the HF radio communication applications as well as for ...
T. Gerzen, N. Jakowski, V. Wilken, M. M. Hoque   +3 more
doaj   +1 more source

Total Electron Content Studies of the Ionosphere

, 1973
Abstract : Radio waves that pass through the earth's ionosphere travel more slowly than their free space velocity due to the group path delay of the ionosphere. This group path delay, directly proportional to the total electron content of the ionosphere, can be an important source of error to VHF, UHF and L-band satellite detection radars and satellite
Jules Aarons, Douglas R. Seeman, Santi Basu, Michael Mendillo, John A. Klobuchar   +4 more
openaire   +2 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Study of the TEC data obtained from the DORIS stations in relation to seismic activity

Annals of Geophysics, 2007
Ionospheric data obtained from the DORIS system are used in this paper. The DORIS system is composed of several ground-based beacons which emit at two frequencies (400 MHz and 2 GHz) and of receivers on board several satellites (currently SPOT2,
M. Parrot, F. Li
doaj   +1 more source

Derivations of the Total Radiation Belt Electron Content

Journal of Geophysical Research: Space Physics
AbstractWe present multiple derivations of the Total Radiation Belt Electron Content (TRBEC), an indicator of the global number of electrons that instantaneously occupy the radiation belts. Derived from electron flux measurements, the TRBEC reduces the spatial information into a scalar quantity that concisely describes global aspects of the system ...
Jared C. Pitzel, Christopher M. Cully, Jean‐Francois Ripoll, Vivien Loridan, Chia‐Lin Huang, Harlan E. Spence, Geoff D. Reeves, Kyle R. Murphy   +7 more
openaire   +2 more sources

Ionospheric total electron content: Spatial patterns of variability [PDF]

Journal of Geophysical Research: Space Physics, 2016
AbstractThe distinctive spatial patterns of the ionosphere's total electron content (TEC) response to solar, seasonal, diurnal, and geomagnetic influences are determined across the globe using a new statistical model constructed from 2‐hourly TEC observations from 1998 to 2015.
J. L. Lean, R. R. Meier, J. M. Picone, F. Sassi, J. T. Emmert, P. G. Richards   +5 more
openaire   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source