19 Matching Results

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Measurements and Theoretical Predictions of Charge Exchange Cross Sections and Emission Spectra for O6+ with H2O, CO, CO2, CH4, N2, NO, N2O and Ar (open access)

Measurements and Theoretical Predictions of Charge Exchange Cross Sections and Emission Spectra for O6+ with H2O, CO, CO2, CH4, N2, NO, N2O and Ar

Article reports absolute CE cross sections for up to three exchanges of the O6+ ion with electrons from the comet/planetary gases H2O, CO, CO2, CH4, N2, NO, N2O and Ar.
Date: 2015
Creator: Machacek, J. R.; Mahapatra, Durga P.; Schultz, David R.; Ralchenko, Yu; Moradmand, A.; El Ghazaly, M. O. A. et al.
System: The UNT Digital Library
Complexity matching in neural networks (open access)

Complexity matching in neural networks

This article adopts the complexity matching principle that the maximal efficiency of communication between two complex networks is realized when both of them are at criticality, and uses this principle to establish the value of the neuronal interaction strength at which criticality occurs.
Date: January 9, 2015
Creator: Mafahim, Javad Usefie; Lambert, David; Zare, Marzieh & Grigolini, Paolo
System: The UNT Digital Library
Excitation of the n=2 levels of hydrogen by proton impact for hydrogen beam diagnostics (open access)

Excitation of the n=2 levels of hydrogen by proton impact for hydrogen beam diagnostics

This article describes the atomic orbital close coupling results for excitation to the n=2 states to document the computational procedure adopted and to convey new insight into the behavior of these fundamental cross sections.
Date: January 15, 2015
Creator: Schultz, David R. & Ovchinnikov, S.Y.
System: The UNT Digital Library
State-selective charge transfer cross sections for light ion impact of atomic hydrogen (open access)

State-selective charge transfer cross sections for light ion impact of atomic hydrogen

This article compares results of approaches applicable in a lower impact energy regime by benchmarking them using key experimental data in order to make knowledge of these cross sections available across the range parameters needed by fusion plasma diagnostics.
Date: January 15, 2015
Creator: Schultz, David R.; Stancil, P.C. & Havener, C.C.
System: The UNT Digital Library
Reformulation of DFT + U as a Pseudohybrid Hubbard Density Funcitonal for Accelerated Materials Discovery (open access)

Reformulation of DFT + U as a Pseudohybrid Hubbard Density Funcitonal for Accelerated Materials Discovery

This article introduces ACBN0, a pseudohybrid Hubbard density functional that yields an improved prediction of the band structure of insulators such as transition-metal oxides, with only a negligible increase in computational cost.
Date: January 28, 2015
Creator: Agapito, Luis A.; Curtarolo, Stefano & Buongiorno Nardelli, Marco
System: The UNT Digital Library
Giant cross-magnetic-field steps due to binary collisions between pair particles (open access)

Giant cross-magnetic-field steps due to binary collisions between pair particles

Article explores giant cross-magnetic-field steps which occur as a result of positron-electron collisions. Within a constant magnetic field (e.g., 1 T), a collision between a positron and an electron can result in a correlated drift across the magnetic field for a continuous range of impact parameters. Within this range, drift distances orders of magnitude larger than that associated with like-charge collisions were observed by computer simulation.
Date: March 5, 2015
Creator: Aguirre, F. F. & Ordonez, Carlos A.
System: The UNT Digital Library
Weak Emission-Line Quasars in the Context of a Modified Baldwin Effect (open access)

Weak Emission-Line Quasars in the Context of a Modified Baldwin Effect

This article tests whether the modified Baldwin effect remains strong across the wides possible of ranges of redshift and luminosity.
Date: May 28, 2015
Creator: Shemmer, Ohad
System: The UNT Digital Library
Multiple Aperture-Based Antihydrogen Parallel Plate Gravity Experiment (open access)

Multiple Aperture-Based Antihydrogen Parallel Plate Gravity Experiment

This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings describes an experiment that could be carried out at the CERN Antiproton Decelerator facility to determine the direction of acceleration of antihydrogen in the earth's gravitational field.
Date: June 8, 2015
Creator: Treacher, A. H.; Hedlof, R. M. & Ordonez, Carlos A.
System: The UNT Digital Library
From neural and social cooperation to the global emergence of cognition (open access)

From neural and social cooperation to the global emergence of cognition

This article elaborates on a discussion of the emergence of intelligence via criticality as a consequence of locality breakdown, by using criticality for the foundation of a novel generation of game theory making the local interaction between players yield long-range effects.
Date: June 16, 2015
Creator: Grigolini, Paolo; Piccinni, Nicola; Svenkeson, Adam; Pramukkul, Pensri; Lambert, David & West, Bruce J.
System: The UNT Digital Library
Artificially Structured Boundary as a Charged Particle Beam Deflector Shield (open access)

Artificially Structured Boundary as a Charged Particle Beam Deflector Shield

This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings studies the possibility of using a planar artificially structured boundary as a charged particle beam deflector shield via classical trajectory Monte Carlo simulation.
Date: June 18, 2015
Creator: Hedlof, R. M. & Ordonez, Carlos A.
System: The UNT Digital Library
Ion Beam Analysis of Microcrystalline Quartz Artifacts from the Reed Mound Site, Delaware County, Oklahoma (open access)

Ion Beam Analysis of Microcrystalline Quartz Artifacts from the Reed Mound Site, Delaware County, Oklahoma

This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings evaluates the potential of particle induced X-ray emission spectrometry as a tool for future Ozarks chert provenance studies based on its ability to facilitate discrimination of Ozarks chert materials from different geological formations and identification of discrete groups of artifacts from the same geological formation.
Date: June 18, 2015
Creator: Younger-Mertz, S. B.; Manuel, J. E.; Reinert, Tilo; Szilasi, S. Z.; Hammerstedt, S. W. & Glass, Gary A.
System: The UNT Digital Library
Magnetic Control of a Charge-Neutralized Ion Beam (open access)

Magnetic Control of a Charge-Neutralized Ion Beam

This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings presents a scheme for controlling charge-neutralized beams using a distortion of a magnetic guide field via the presence of two current carrying wires.
Date: June 18, 2015
Creator: Phillips, R. E. & Ordonez, Carlos A.
System: The UNT Digital Library
Particle Transport along Magnetic Null Lines as Sputter or Antihydrogen Source (open access)

Particle Transport along Magnetic Null Lines as Sputter or Antihydrogen Source

This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings investigates particle transport along null magnetic lines using classical trajectory Monte Carlo simulations, described as a traveling wave and through diffusion equations.
Date: June 18, 2015
Creator: Lane, Ryan A. & Ordonez, Carlos A.
System: The UNT Digital Library
Radial Expansion of a Low Energy Positron Beam Passing Through a Cold Electron Plasma within a Uniform Magnetic Field (open access)

Radial Expansion of a Low Energy Positron Beam Passing Through a Cold Electron Plasma within a Uniform Magnetic Field

This paper from the 23rd Conference on Application of Accelerators in Research and Industry conference proceedings studies the radial expansion of a low energy positron beam passing through a cold electron plasma within a uniform magnetic field using a classical trajectory Monte Carlo simulation.
Date: June 18, 2015
Creator: Aguirre, F. F. & Ordonez, Carlos A.
System: The UNT Digital Library
Ionised outflows in z ~ 2.4 quasar host galaxies (open access)

Ionised outflows in z ~ 2.4 quasar host galaxies

This article presents a kinematical analysis of the [OIII]λ5007 emission line observed in six high-luminosity quasars at z ~ 2.4.
Date: August 1, 2015
Creator: Carniani, Stefano; Marconi, Alessandro; Maiolino, Roberto; Balmaverde, Barbara; Brusa, Marcella; Cano-Díaz, Mariana et al.
System: The UNT Digital Library
Triply Differential Measurements for Positron Impact Ionization of Argon (open access)

Triply Differential Measurements for Positron Impact Ionization of Argon

This article reports triply differential cross sections for positron impact ionization of argon.
Date: September 7, 2015
Creator: Mueller, D. W.; Knudsen, E. J.; Boadle, R.; Armitage, S.; Dorn, A.; Buckman, S. J. et al.
System: The UNT Digital Library
Scattering Suppression in Epsilon-Near-Zero Plasmonic Fractal Shells (open access)

Scattering Suppression in Epsilon-Near-Zero Plasmonic Fractal Shells

This article studies silica-gold core-shell microspheres with plasmonic fractal shells to show that the forward scattering of the silica microspheres is strongly suppressed.
Date: October 12, 2015
Creator: de Silva, Vashista C.; Nyga, Piotr & Drachev, Vladimir P.
System: The UNT Digital Library
Electrostatic enhancement of light emitted by semiconductor quantum well (open access)

Electrostatic enhancement of light emitted by semiconductor quantum well

This article proposes an electrostatic mechanism for enhancement of light radiated from semiconductor emitter which is comparable in effect to plasmonic mechanism.
Date: October 13, 2015
Creator: Krokhin, Arkadii A.; Neogi, Arup; Llopis, A.; Mahat, M.; Gumen, L.; Pereira, S. et al.
System: The UNT Digital Library
Ion exchanger in the brain: Quantitative analysis of perineuronally fixed anionic binding sites suggests diffusion barriers with ion sorting properties (open access)

Ion exchanger in the brain: Quantitative analysis of perineuronally fixed anionic binding sites suggests diffusion barriers with ion sorting properties

This article proposes that fixed charge-densities in the brain are involved in regulating ion mobility, the volume fraction of extracellular space and the viscosity of matrix components.
Date: December 1, 2015
Creator: Morawski, Markus; Reinert, Tilo; Meyer-Klaucke, Wolfram; Wagner, Friedrich E.; Tröger, Wolfgang; Reinert, Anja et al.
System: The UNT Digital Library