Browsing College of Sciences and Mathematics by Issue Date
Now showing items 161-180 of 389
One- and two-dimensional hybrid simulations of whistler mode waves in a dipole field
(2020-06-05)
We simulate whistler mode waves using a hybrid code. There are four species in the simulations, hot electrons initialized with a bi-Maxwellian distribution with temperature in the direction perpendicular to background ...
Signatures of electron Landau resonant interactions with chorus waves from THEMIS observations
(2020-06-05)
Simultaneous observations of electron phase space density (PSD) and chorus waves for more than 4 years by the Time History of Events and Macroscale Interactions during Substorms (THEMIS) are analyzed to identify signatures ...
Oxygen-hydrogen differentiated observations from TWINS: The 22 July 2009 storm
(2020-06-09)
The 22 July 2009 magnetic storm is the first significant storm during the emergence of the recent prolonged solar cycle minimum. This moderate storm (minimum Dst approximately -78 nT) has received a good deal of attention ...
Three-dimensional MHD simulations of interplanetary rotational discontinuities impacting the Earth's bow shock and magnetosheath
(2020-06-30)
The first ever fully three-dimensional magnetohydrodynamic (MHD) simulations of the detailed effects of MHD discontinuities on the magnetosheath have been performed. The simulation results predict that the interaction ...
Two-dimensional hybrid simulation of the dayside reconnection layer and associated ion transport
(2020-06-30)
The structure of the reconnection layer at the dayside magnetopause is studied by using a two-dimensional (2-D) hybrid code. The simulation domain is a rectangle in the at plane around an X line at the magnetopause. In our ...
Laser Ar-40/Ar-39 age constraints on Miocene sequences from the Bengal basin: Implications for middle Miocene denudation of the eastern Himalayas
(2020-06-16)
Petrographic, mineral-chemistry and subsurface studies reveal that orogenic sedimentation had already begun in the Bengal basin by the early Miocene. Laser Ar-40/Ar-39 age determinations were made for detrital muscovite ...
Trapped and precipitating protons in the inner magnetosphere as seen by IMAGE
(2020-06-18)
[1] Images from the IMAGE satellite of precipitating protons (SU12/FUV) and trapped protons at 8.5 (MENA) and 33 keV (HENA) are compared during three periods: ( 1) 12 August 2000 from 1000 UT to 1145 UT just after the peak ...
Generation of near-Earth reconnection by divergent flows in the plasma sheet
(2020-06-25)
A global two-dimensional hybrid simulation is carried out to study the evolution of the near-Earth plasma sheet. It is shown that reconnection X lines and plasmoids can be generated by diverging flows in the plasma sheet. ...
Intermediate shocks in three-dimensional magnetohydrodynamic bow-shock flows with multiple interacting shock fronts
(2020-06-18)
Previous MHD simulations predict that when switch-on shock conditions obtain in the solar wind, the bow shock produced in front of an ellipsoidal obstacle will produce a unique bow shock configuration that includes a concave ...
Evolution of CIR storm on 22 July 2009
(2020-06-09)
Global images of ion intensities are deconvolved from TWINS ENA images during the main and recovery phase of a CIR storm on 22 July 2009. The global spatial ion images taken at different times, along with solar wind data, ...
A Remodeled Protein Arginine Methyltransferase 1 (PRMT1) Generates Symmetric Dimethylarginine
(2020-07-24)
Protein arginine methylation is emerging as a significant post-translational modification involved in various cell processes and human diseases. As the major arginine methylation enzyme, protein arginine methyltransferase ...
Subunit D of RNA Polymerase from Methanosarcina acetivorans Contains Two Oxygen-labile [4Fe-4S] Clusters IMPLICATIONS FOR OXIDANT-DEPENDENT REGULATION OF TRANSCRIPTION
(2020-08-20)
Subunit D of multisubunit RNA polymerase from many species of archaea is predicted to bind one to two iron-sulfur (Fe-S) clusters, the function of which is unknown. A survey of encoded subunit D in the genomes of sequenced ...
Multiple Colonizations Lead to Cryptic Biodiversity in an Island Ecosystem: Comparative Phylogeography of Anchialine Shrimp Species in the Ryukyu Archipelago, Japan
(2022-03-04)
Archipelagos of the Indo-West Pacific are considered to be among the richest in the world in biodiversity,
and phylogeographic studies generally support either the
center of origin or the center of accumulation hypothesis ...
Hemichordate Molecular Phylogeny Reveals a Novel Cold-Water Clade of Harrimaniid Acorn Worms
(2022-03-04)
Hemichordates are instrumental to understanding early deuterostome and chordate evolution, yet diversity and relationships within the group have been understudied. Recently, there has been renewed interest in hemichordate ...
Eukaryotic N-Glycosylation Occurs via the Membrane-anchored C-terminal Domain of the Stt3p Subunit of Oligosaccharyltransferase
(2020-07-24)
N-Glycosylation is an essential and highly conserved protein
modification. In eukaryotes, it is catalyzed by a multisubunit
membrane-associated enzyme, oligosaccharyltransferase (OT).
We report the high resolution ...
Indirect Impacts of Recreational Scuba Diving: Patterns of Growth and Predation in Branching Stony Corals
(2021-01-27)
The highest recorded rates of recreational SCUBA diving occur on coral reefs
at Eilat in the northern Red Sea, where many scleractinian corals are damaged by
physical contact with divers. We compared coral skeletal growth ...
Second-order, two-electron Dyson propagator theory: Comparisons for vertical double ionization potentials
(2021-01-26)
The second-order, two-electron Dyson propagator is derived using superoperator theory with a
spin-adapted formulation. To include certain ladder diagrams to all orders, the shifted-denominator
SD2 approximation is made. ...
Quasiparticle virtual orbitals in electron propagator calculations
(2021-01-26)
The computational limits of accurate electron propagator methods for the calculation of electron
binding energies of large molecules are usually determined by the rank of the virtual orbital space.
Electron density ...
Efficient evaluation of analytic Fukui functions
(2021-01-26)
An efficient method for the analytic evaluation of Fukui functions is proposed. Working equations
are derived and numerical results are used to validate the method on medium size set of molecules.
In addition to the ...
Electron propagator calculations on C-60 and C-70 photoelectron spectra
(2021-01-26)
Vertical ionization energies of C60 and C70 fullerenes are calculated with semidirect implementations
of electron propagator methods and a triple- plus polarization basis set. These predictions are in
close agreement ...