1,721,020 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Open Boundary Condition for Particle Simulation in Magnetic Reconnection Research
Full text linkWe develop a three-dimensional electromagnetic PArticle Simulation code for investigating driven Magnetic reconnection in an Open system from the kinetic view-point (PASMO). In this paper, we advance a new model for the upstream and downstream boundaries. We succeed in achieving the frozen-in condition for both electrons and ions with high accuracy at the upstream boundary, while we can decrease unphysical noise at the downstream boundary. We compare the simulation results of long and short-simulation boxes to check whether the downstream boundary model fulfills its function. The results of the short-simulation box effectively mimic those of the long-simulation box. Using the new boundary model, we succeed in increasing the accuracy of simulation.journal articl
Scientific Visualization of Magnetic Reconnection Simulation Data by the CAVE Virtual Reality System
No full textThree-dimensional particle simulation of plasma instabilities and collisionless reconnection in a current sheet
No full textScientific Visualization of Magnetic Reconnection Simulation Data by the CAVE Virtual Reality System
Full text linkIn this study, scientific visualization by the CAVE virtual reality (VR) system is applied to the analysis of magnetic reconnection simulation data for the first time. The magnetic field streamline, the isosurface of density profile, the contour of temperature profile, the arrow of flow velocity, and other variables are displayed in VR space. The trajectories of particles under the electromagnetic field obtained by simulation are also traced simultaneously. We can clearly see the relationship between complex three-dimensional structures of magnetic fields, distribution of particle temperature, particle trajectories, and other variables in VR space.journal articl
Simulation science at the National Institute for Fusion Science
Full text linkBased on the past two-decades activities at the Theory and Computer Simulation Center (TCSC) and the Department of Simulation Science (DSS) in the National Institute for Fusion Science (NIFS), the Numerical Simulation Research Project (NSRP) has been launched to continue the activities in TCSC and DSS, and evolve them in a more systematic way for the re-organization of NIFS in 2010. In this study, the progress of simulation science at NIFS in the past two decades is reviewed and an overview of the NSRP for the foreseeable future is reported.journal articl
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
The meandering orbit effect on stabilization of the tilting instability in a field-reversed configuration
No full textParticle simulation study of collisionless driven reconnection in a sheared magnetic field
No full text- …
