Background

Bakgrund
Ph D, Senior Researcher
My modelling research interest is to a large extent pursuing the development of new particle based tools or applying established particle methods to various problems in physics or mechanics. Some examples of my earlier experiences of particle-based methods are in classical mechanics, many-particle problems in quantum mechanics, and molecular dynamics simulation (MDS). I am also a co-author of a new particle method: the Dynamic Functional Particle Method (DFPM), which is a general numerical solver for large (also non-linear) differential equations. In the case of large eigenvalue problems DFPM has already proved itself as a very efficient method (at least 10 times faster than e.g. ARPACK).

Area of interest

A few examples of established physical particle methods are molecular dynamics (MDS), smooth particle hydrodynamics (SPH), smooth particle applied mechanics (SPAM), Hybrid Lattice Particle Method (HLPM), Element Free Galerkin (EFG), particle methods in celestial mechanics, particle methods for special effects and graphical animations etc. These methods can be used to treat the physical particles (or entities) directly. One can thus perform simulations of various phenomena in physics and material or fluid mechanics. One may recognize that it is often possible to merge many of the physical entities into super particles. It is about multi-scales and what kind of physical phenomena one wishes to study.

Current research

At the FSCN research centre, particle methods have already been applied to problems related to papermachine runnability and to the paper web by viewing the material as a continuous medium. Work is also in progress by PhD student Johan Persson to model the paper at the fibre network level by using particle modelling. MDS is a technique that makes it possible to simulate the self-assemblation and dynamical structures of nano-particles deposited on a paper surface. This is relevant in the nano-electronics KKS-project which is a collaboration with Prof. Hans-Erik Nilsson and Prof. Håkan Olin.

Publications

Articles in journals Conference papers Doctoral theses, monographs Other

Articles in journals

Hellström, L. M. , Biller, S. , Edvardsson, S. & Gradin, P. A. (2014). A theoretical and experimental study of the circular sawing process. Holzforschung, vol. 68: 3, pp. 307-312.

Zhang, R. , Andersson, H. , Olsen, M. , Hummelgård, M. , Edvardsson, S. , Nilsson, H. & Olin, H. (2014). Piezoelectric gated ZnO nanowire diode studied by in situ TEM probing. Nano Energy, vol. 3, pp. 10-15.

Zhang, R. , Andersson, H. , Andersson, M. , Andres, B. , Edlund, H. , Edström, P. , Edvardsson, S. , Forsberg, S. & et al. (2013). Soap-film coating : High-speed deposition of multilayer nanofilms. Scientific Reports, vol. 3, pp. Art. no. 1477

Neuman, M. , Edvardsson, S. & Edström, P. (2013). A particle approach to the radiative transfer equation with fluorescence. Optics Letters,

Edvardsson, S. , Gulliksson, M. & Persson, J. (2012). The dynamical functional particle method: an approach for boundary value problems. Journal of applied mechanics, vol. 79: 2, pp. art. no. 021012

Edvardsson, S. , Gradin, P. , Isaksson, P. & Gulliksson, M. (2012). A Note on Wet Paper Web Adhesion Strength. Journal of Testing and Evaluation, vol. 40: 4, pp. 682-686.

Edvardsson, S. , Gradin, P. & Isaksson, P. (2011). On dissipative effects of paper web adhesion strength. International Journal of Solids and Structures, vol. 48: 1, pp. 24-30.

Edvardsson, S. & Uesaka, T. (2010). System dynamics of the open draw with web adhesion: Particle approach. Journal of applied mechanics, vol. 77: 2, pp. 1-11.

Edvardsson, S. & Karlsson, K. (2008). Spin axis variations of Mars: numerical limitations and model dependences. Astronomical Journal, vol. 135: 4, pp. 1151-1160.

Freyhult, E. , Edvardsson, S. , Tamas, I. , Moulton, V. & Poole, A. (2008). Fisher: a program for the detection of H/ACA snoRNAs using MFE secondary structure prediction and comparative genomics - assessment and update. BMC research notes, vol. 1: 49, pp. 1-8.

Ning, L. , Lodi, L. , Trioni, M. I. , Tubino, R. , Edvardsson, S. & Brivio, G. P. (2007). Theoretical study ofI-4(13/2) -> I-4(15/2) luminescence quenching by OH for LaF3 : Er3+ nanoparticles in solution. Journal of physics . Condensed matter, vol. 19: 1, pp. 016202

Ning, L. , Edvardsson, S. & Åberg, D. (2006). Dynamic intensity model calculation of vibronic oscillator strengths for Cs2NaNdCl6 : A molecular dynamics study. Journal of Physical chemistry B, vol. 110: 43, pp. 21424-21429.

Edvardsson, S. , Ning, L. & Åberg, D. (2006). The connection between the dynamic intensity model and the vibronic intensity model for f-f transitions. Journal of physics. B, Atomic, molecular and optical physics, vol. 39: 9, pp. 2127-2143.

Engholm, M. , Norin, L. , Edvardsson, S. , Lashgari, K. & Westin, G. (2006). A structural investigation of a synthesized precursor for fiber optical applications; the heterobimetallic ErNb_2(OPr^i)_13. Optical Materials, vol. 29: 4, pp. 386-391.

Engholm, M. , Lashgari, K. , Edvardsson, S. , Westin, G. & Norin, L. (2005). Atomically designed precursors in optical fiber amplifiers : The thermal stability of the heteroimetallic ErAl_3(OPri)_12 in a solution-coated silica soot. Journal of Applied Physics, vol. 97: 11, pp. 113104

Dong, G. J. , Edvardsson, S. , Lu, W. P. & Barker, P. F. (2005). Super-Gaussian mirror for high-field-seeking molecules. Physical Review A. Atomic, Molecular, and Optical Physics, vol. 72: 3

Wessley, O. , Roy, P. , Åberg, D. , Andersson, C. , Edvardsson, S. , Karis, O. , Sanyal, B. , Svedlindh, P. & et al. (2004). Final state effects in the X-ray absorption spectra of La0.7Sr0.3MnO3. Journal of Magnetism and Magnetic Materials, vol. 272-276: 3, pp. 1780-1781.

Edvardsson, S. , Åberg, D. & Uddholm, P. (2004). A program for accurate solutions of two-electron atoms. Computer Physics Communications, vol. 165: 3, pp. 260-270.

Åberg, D. , Edvardsson, S. & Engholm, M. (2003). Direct calculation of correlated absorption amplitudes for Nd:LiYF4. Physical Review B. Condensed Matter and Materials Physics, vol. 68: 19, pp. 195105-1.

Colarieti-Tosti, M. , Simak, S. I. , Ahuja, R. , Nordström, L. , Eriksson, O. , Åberg, D. , Edvardsson, S. & Brook, M. S. S. (2003). On the Magnetic Anisotropy of Gd Metal. Physical review letters, vol. 91: 15, pp. 157201-1.

Wessely, O. , Roy, P. , Åberg, D. , Andersson, C. , Edvardsson, S. , Karis, O. , Sanyal, B. , Snedlindh, P. & et al. (2003). Initial and final state effects in the x-ray absorption process of La1-xSrxMnO3. Physical Review B : Condensed Matter and Materials Physics, vol. 68: 23, pp. 235109-1.

Edvardsson, S. , Gardner, P. P. , Poole, A. M. , Hendy, M. D. , Penny, D. & Moulton, V. (2003). A search for H/ACA snoRNAs in yeast using MFE secondary structure prediction. Bioinformatics, vol. 19: 7, pp. 865-873.

Åberg, D. & Edvardsson, S. (2002). Direct calculation of optical absorption amplitudes for trivalent rare-earth ions in LiYF4. Physical Review B, vol. 65: 4, pp. 045111-1.

Edvardsson, S. , Karlsson, K. G. & Engholm, M. (2002). Accurate spin axes and solar system dynamics: climatic variations for the Earth and Mars. Astronomy & Astrophysics, vol. 384: 2, pp. 689-701.

Edvardsson, S. & Åberg, D. (2001). An atomic program for energy levels of equivalent electrons: lanthanides and actinides. Computer Physics Communications, vol. 133: 2/3, pp. 396-406.

Edvardsson, S. & Åberg, D. (2000). The energy matrix using determinantal product states applied to Ho:YAG. Journal of Alloys and Compounds, vol. 303, pp. 280-284.

Åberg, D. & Edvardsson, S. (2000). The crystal dependent open-shell polarizability of f-elements : higher order contributions. Journal of Alloys and Compounds, vol. 303-304: 24 May, pp. 345-348.

Edvardsson, S. & Klintenberg, M. (1999). The use of CI calculated polarizabilities to study rare-earth CFP dependencies in the laser host RE:YLF. Materials Science Forum, vol. 315/317, pp. 407-414.

Klintenberg, M. , Edvardsson, S. , Guillot-Noel, O. , Viana, B. & Thomas, J. O. (1999). The use of molecular dynamics to simulate the temperature dependence of the calculated absorption spectrum for Nd3+:YAG. Materials Science Forum, vol. 315-317, pp. 42-50.

Klintenberg, M. , Edvardsson, S. & Thomas, J. O. (1998). Energy level and oscillator strength calculations for Er:Y2O3 : A molecular dynamics based study. Journal of alloys and compounds, vol. 275-277, pp. 174-176.

Edvardsson, S. & Klintenberg, M. (1998). Role of the electrostatic model in calculating rare-earth crystal-field parameters. Journal of alloys and compounds, vol. 275-277, pp. 230-233.

Klintenberg, M. , Edvardsson, S. & Thomas, J. (1997). Oscillator strength calculations for Nd2O3 and Nd3+:LiYF4. Journal Of Luminescence, vol. 72-74, pp. 218-219.

Klintenberg, M. , Edvardsson, S. & Thomas, J. O. (1997). Calculation of energy levels and polarized oscillator strengths for Nd3+:YAG. Physical review. B, Condensed matter, vol. 55: 16, pp. 10369-10375.

Edvardsson, S. , Klintenberg, M. & Thomas, J. O. (1996). Use of polarized optical absorption to obtain structural information for Na1/Nd31 b9-alumina. Physical Review B, Condensed matter, vol. 54: 24, pp. 17476-17 485.

Edvardsson, S. , Ojamäe, L. & Thomas, J. O. (1994). A study of vibrational modes in Na(+)beta-Alumina by molecular-dynamics simulation. JOURNAL OF PHYSICS - CONDENSED MATTER, vol. 6: 7, pp. 1319-1332.

Wolf, M. , Edvardsson, S. , Zendejas, M. A. & Thomas, J. O. (1993). Molecular dynamics based analysis of the absorption of spectra of Nd3+-doped Na+ β’’-alumina.. Physical Review B, vol. 48: 14, pp. 10129-10136.

Edvardsson, S. , Wolf, M. & Thomas, J. O. (1992). Sensitivity of optical absorption intensities for rare-earth ions. Physical Review B, vol. 45: 19, pp. 10918-10923.

Flipse, C. F. J. , Edvardsson, S. & Kadowaki, K. (1989). XPS study of the new superconductor Nd-Ce-Cu-O. Physica C: Superconductivity, vol. 162-164: 2, pp. 1389-1390.

Edvardsson, S. , Neuman, M. , Edström, P. , Gulliksson, M. & Olin, H. (). Role of the particle method DFPM for solving linear equations. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics,

Conference papers

Zhang, R. , Andersson, H. , Andersson, M. , Andres, B. , Edström, P. , Edvardsson, S. , Forsberg, S. , Hummelgård, M. & et al. (2013). High-speed deposition of multilayer nanofilms using soap-film coating. .

Edvardsson, S. & Uesaka, T. (2009). System stability of the open draw section and paper machine runnability. In ADVANCES IN PULP AND PAPER RESEARCH, OXFORD 2009, VOLS 1-3.. pp. 557--575.

Edvardsson, S. & Uesaka, T. (2009). Papermaking Research symposium (PRS) : Web tension variations and runnability of the open draw section. In PRS 2009 Papermaking Research Symposium. Kuopio :

Lashgari, K. , Kritikos, M. , Engholm, M. , Norin, L. , Edvardsson, S. & Westin, G. (2006). Sol-gel preparation of Er-doped planar and fibre wave-guides using heterometallic. In SPIE conference, San Diego (2006)..

Edvardsson, S. (2002). Future iceages for the next 100,000 years. In The handling of timescales in assessing post-closure safety of deep geological repositories : : workshop proceedings, Paris, France, 16-18 April 2002, hosted by the French Institute for Radiological Protection and Nuclear Safety (IRSN). Paris : (Radioactive waste management). pp. 212-

Edvardsson, S. , Wolf, M. , Thomas, J. O. & Flores, A. (1991). Molecular dynamics simulation applied to the study of absorption spectra of Nd203. In The CP90 Europhysics Conference on Computational Physics : Amsterdam, the Netherlands, 10 - 13 September 1990 ; [proceedings] : Europhysics Conference on Computational Physics ; (Amsterdam) : 1990.09.10-13. Singapore : . pp. 560-

Doctoral theses, monographs

Edvardsson, S. (1993). Molecular dynamics as a tool to calculating optical properties in rare-earth ion doped solids. Dis. Uppsala : Univ., 1993 (Comprehensive summaries of Uppsala dissertations from the Faculty of Science and Technology : 15)

Other

Gulliksson, M. , Edvardsson, S. & Lind, A. (2012). The dynamical functional method : Arxiv.