A5085741827- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Research Data Management Practices
- scientometrics and bibliometrics research
- Stellar, planetary, and galactic studies
- History and Developments in Astronomy
- Education, Healthcare and Sociology Research
- Semantic Web and Ontologies
- Ionosphere and magnetosphere dynamics
- Scientific Computing and Data Management
- Astronomical Observations and Instrumentation
- Research in Social Sciences
- Social and Educational Sciences
- Characterization and Applications of Magnetic Nanoparticles
- Astronomy and Astrophysical Research
- Health and Medical Research Impacts
- Library Science and Information Systems
- Meta-analysis and systematic reviews
- Digital Humanities and Scholarship
- Educational Tools and Methods
- Astrophysics and Star Formation Studies
- Biomedical Text Mining and Ontologies
- Web and Library Services
- Team Dynamics and Performance
University of Southern Denmark
2015-2025
International Federation of Library Associations and Institutions
2025
State and University Library
2005-2024
University of Copenhagen
1998-2014
Royal Danish Library
2007-2013
Royal Swedish Academy of Sciences
2000-2002
The observed irregular brightness fluctuations of the well-known red supergiant Betelgeuse (α Ori, M2 Iab) have been attributed by M. Schwarzschild (1975) to changing granulation pattern formed only a few giant convection cells covering surface this star. structure revealed modern interferometric methods appears be generally consistent with explanation as large-scale granular intensity fluctuations. data can modeled equally well assuming presence (up 3) unresolved hot or cool spots on...
To avoid waste of research, no new studies should be done without a systematic review existing evidence, argue Hans Lund and colleagues
We have modeled numerically the propagation of waves through magnetic structures in a stratified atmosphere. first simulate number simple, exemplary field geometries order to obtain better insight into effect differing on wave speeds, amplitudes, polarizations, direction propagation, etc., with view understanding wide variety wavelike and oscillatory processes observed solar As particular example, we then apply method oscillations chromospheric network internetwork. find that regions where...
This paper presents some indications to the existence of a citation advantage related sharing data using astrophysics as case. Through bibliometric analyses we find for astrophysical papers in core journals. The arises indexed are associated with by bibliographical links, and consists receiving on average significantly more citations per year, than do not links data.
The interaction of magnetic fields and stratified convection was studied in the context solar late type stellar dynamos by using numerical 3D MHD simulations. topology asymmetric over-turning enables a pumping mechanism that may render flux storage problem obsolete. inclusion open boundary conditions leads to considerable loss unless is placed close physical boundary. Simulations including solar-like latitudinal shear indicates toroidal field several tens kilo-Gauss be held down mechanism.
Numerical simulations of kinematic dynamo action in steady and three-dimensional ABC flows are presented with special focus on the difference growth rates between cases single multiple periods prescribed velocity field. It is found that rate (apart from a trivial factor stemming scaling strain wavenumber field) due to differences recycling weakest part magnetic The wavelength classical ABC-flow experiments impose stronger symmetry requirements, which results suppression rate. larger wave...
Abstract We present here evidence for the existence of a citation advantage within astrophysics papers that link to data. Using simple measures based on publication data from NASA Astrophysics Data System we find with links receiving average significantly more citations per paper than without Furthermore, using INSPEC and Web Science databases investigate whether either an experimental or theoretical nature display different behavior.
Evidence is presented from numerical magneto-hydrodynamical simulations for the existence of magnetic activity in late-type giant stars. A red supergiant with stellar parameters similar to that Betelgeuse (α Orionis) modeled as a “star-in-a-box” high-order “Pencil Code”. Both linear kinematic and non-linear saturated dynamo action are possible: field saturates at super-equipartition value corresponding surface strengths up ~500 Gauss. In regime two different modes found exponential growth...
Context.We present results from non linear MHD dynamo experiments with a three-dimensional steady and smooth flow that drives fast action in the kinematic regime. In saturation regime, system yields strong magnetic fields, which undergo transitions between an energy-equipartition turbulent state. The generation evolution of such fields is relevant for understanding occurs stars other astrophysical objects.
This article highlights important new opportunities for libraries by analysing the roles they could potentially play in citizen science projects. Citizen is one of eight pillars open identified Open Science Policy Platform, an EC Working Group. The authors suggest that wishing to support or engage include contributing specific skills development; building and maintaining collections protocols, data forms educational materials; making FAIR; supporting communication roles; participating...
Editor: Grant, Friedel.-- This Open Science Roadmap is the result of contributions from across LIBER community.
This paper present some indications of the existence a Citation Advantage related to linked data, using astrophysics as case. Using simple measures, I find that presently (at least since 2009) amounts papers with links data receiving on average 50% more citations per year, than without data. A similar study by other authors should cummulative effect after several years amounting 20%. Hence, Data Sharing seems inevitable.
Abstract Efforts to read medieval manuscript waste recycled as bookbinding material in the sixteenth and seventeenth centuries have resulted chemical analysis of four books housed at University Library Southern Denmark Smithsonian Libraries Washington DC. Four green coloured book bindings been investigated by optical microscopy, micro X-ray fluorescence, diffraction, Raman spectroscopy, mass laser ablation inductively coupled plasma spectrometry. The results show that pigments used obscure...
Time-dependent numerical simulations of nonlinear wave propagation in a two-dimensional (slab) magnetic field geometry show mixing and interference to be important aspects oscillatory phenomena starspots sunspots. Discrete sources located within the umbra generate both fast slow MHD waves. The latter are compressive acoustic waves which guided along lines steepen into N-waves with increasing height spot atmosphere. former less compressive, accelerate rapidly upward through overlying low-β...
We present results from numerical simulations of nonlinear MHD dynamo action produced by three-dimensional flows that become turbulent for high values the fluid Reynolds number. The magnitude forcing function driving flow is allowed to evolve with time in such way as maintain an approximately constant velocity amplitude (and average kinetic energy) when becomes hydrodynamically unstable. It found saturation level increases number (at magnetic Prandtl number), and growth rate approaches...
We present here evidence for the existence of a citation advantage within astrophysics papers that link to data. Using simple measures based on publication data from NASA Astrophysics Data System we find with links receiving average significantly more citations per paper than without Furthermore, using INSPEC and Web Science databases investigate whether either an experimental or theoretical nature display different behavior.
The kinematic induction equation of MHD is solved numerically in the case normal "111" ABC flow using a general staggered mesh method. Careful 3-D visualizations topology magnetic field reveal that previous conclusions about modes operation this type dynamo must be revised. two known windows action at low and high Reynolds number, correspond to distinct modes, both relying crucially on replenishing near discontinuity β stagnation points flow. One these display double structures were...
Researchers in Europe are increasingly assessed by their publication metrics. To uncover the effect of quantitative assessment on strategies clinical researchers Denmark, we interviewed 9 senior at Department Clinical Research University Southern Denmark with lowest and highest values for a, as defined Hirsch. Our aim is to investigate importance these metrics academic careers: h-index, number publications, citations, international collaborations, local field specific journal publishing high...
We present 3-d numerical magneto-hydrodynamic simulations of a buoyant, twisted magnetic flux rope embedded in stratified, solar-like model convection zone. The is given an initial twist such that it neither kinks nor fragments during its ascent. Moreover, energy content with respect to chosen so the retains basic geometry while being deflected from purely vertical ascent by convective flows. show advected away core as interacts convection. results thus support idea amount toroidal stored at...