Peter L. Christiansen:
INTERNATIONAL COLLABORATION AND CONTACTS
Extended Visits
 Polish Academy of Sciences, Warsaw:
Instytut Podstawowych Problemow Techniki, 2 weeks (1972)
Instytut Fizyki, 1 week (1983)
 V. A. Steklov Mathematics Institute, Academy of Sciences of the USSR,
St. Petersburg and Moscow, 2 weeks (1982)
 Guest Professorship at Consiglio Nazionale delle Ricerche, Italy
1 month (1985) and 1 month (1987)
 Institute for Mathematics and its Applications, University of
Minnesota, Minneapolis, U.S.A., 1 month (1988)
 Program of Applied Mathematics, University of Arizona, Tucson, U.S.A.,
2 months (198889)
 Center for Nonlinear Studies, Los Alamos National Laboratory, N. M., U.S.A.,
2 months (1989), 1 week (1995)
 Institute of Mathematics, Fudan University, Shanghai, China, 1 week (1989)
 Mechanics Department, Zhejiang University, Hangzou, China, 1 week (1989)
 Department of Mathematics, Beijing University of Aeronautics
and Astronautics and Institute of Applied Physics and Computational Mathematics,
Beijing, China, 2 weeks (1989)
 Dipartimento de Matematica e Applicazioni, Università di Napoli,
Italy, 4 months (1989)
 Department of Mathematics, University of Patras, Greece, 2 weeks (1990)
 Department of Physics, University of Alberta, Edmonton, Canada, 1 month
(1995)
 Optical Sciences Centre, Australian National University, Canberra,
Australia, 1 month (1996)
 Department of Physics, University of Madeira, Funchal, Portugal, 1 week (1997)
Shorter Visits and Guest Lectures
 Courant Institute of Mathematical Sciences, New York University (4 times)
 Department of Electrical Engineering, Syracuse University, N. Y.
 ESSA, Boulder, Colorado
 National Research Council, Ottawa
 Mathematical Department, SUNI, Stony Brook, N. Y.
 Matematisk/teknisk fysiska Sektionsgruppen, Chalmers Tekniska Högskola,
Gothenburg
 Polish Academy of Sciences, Warsaw
 Chinese University, Hongkong
 School of Mathematics, University of New South Wales, Sydney
 Department of Mathematics and Computer Science, Clarkson College, Potsdam,
N. Y.
 Mathematics Research Center, University of Wisconsin, Madison
 Department of Mathematics, University of British Columbia, Vancouver
 Jet Propulsion Laboratory, Caltech, Pasadena
 Department of Mathematics, UMIST, Manchester
 Mathematical Institute, University of Oxford
 School of Mathematics, University of NewcastleuponTyne
 Department of Mathematics, HeriotWatt University, Edinburgh (2 times)
 Department of Mathematical Physics, Birmingham University
 Department of Mathematics, Imperial College, London
 V. A. Steklov Mathematics Institute, St. Petersburg
 V. A. Steklov Mathematics Institute, Moscow
 Laboratory of Computing Techniques and Automation, Joint Institute
for Nuclear Research, Dubna
 Center for Nonlinear Studies, Los Alamos National Laboratory, N. M.
(7 times)
 Department of Mathematics, Waterloo University
 Department of Applied Mathematics, University of Western Ontario
 Department of Mathematics, University of Chicago
 Department of Physics, Rensselaer Polytechnic Institute, Troy, N. Y.
 ASEA, Västerås, Sweden
 Dipartimento di Fisica, Università di Salerno (7 times)
 Mathematics Department, University of Pittsburgh, Penn.
 Mathematics Department, Georgia Institute of Technology, Atlanta
 Mathematics Department, Cornell University, Ithaca, N. Y.
 Nippon Telegraph and Telephone Public Cooperation, Electrical Communication
Laboratories, Tokyo
 Department of Physics, University of Tokyo
 Matematiske Institutionen, Uppsala University
 Dipartimento di Fisica, Università di Roma (2 times)
 Dipartimento di Matematica, Università di Cosenza
 Dipartimento di Fisica, Università di Milano
 Institutionen för nationalekonomi, Umeå University
 Department of Mathematics, University of Arizona, Tucson (3 times)
 Department of Mathematics, Ohio State University, Columbus (2 times)
 Thermophysics Department, Uzbek Academy of Sciences, Tashkent
 Institute of Nonlinear Science, University of California, San Diego, U.S.A.
 Dipartimento di Matematica, Università di Bari
 Istituto di Cibernetica, Arco Felice
 Dipartimento di Fisica, Università: di Perugia
 Physique Non Linéaire OSE, Faculté des Sciences et
Techniques, Université de Bourgogne, Dijon
 Physics Department, Peking University, Beijing
 Institute for Theoretical Physics, Ukrainian Academy of Sciences, Kiev
 L. D. Landau Institute, Institute of Theoretical Physics, Moscow
 Institute of Spectroscopy, Troitsk
 Institute of Physics, Bayreuth
 Department of Physics, University of Illinois, Urbana
 Department of Physics and Astronomy, University of New Mexico, Albuquerque
 Institute for Theoretical Physics, HeinrichHeine University,
Düsseldorf
 Department of Physics, University of Crete, Heraklion, Crete
 Department of Physics, University of Linköping, Linköping
 Department of Mathematics, Monash University, Melbourne
International Networks and Research Projects
also listed under Grants from external sponsors
 "Wave turbulence, condensation and collapses:
theory, numerics and applications in nonlinear optics, plasmas and fluids"
(1997)
Collaboration between: J. Juul Rasmussen, Denmark, P.L. Christiansen,
Denmark, P.L.
Sulem, France, L. Bergé, France,
V.E. Zakharov, Russia, and E.A. Kuznetsov, Russia
Coordinator: J. Juul Rasmussen
Sponsor: INTAS
 "Nonlinear Localized Modes in Complex Systems with Noise and Disorder"
(1997)
Collaboration between: G.P. Tsironis, Greece, P.L. Christiansen,
Denmark,
S. Aubry, France,
A.V.Zolotaryuk, Ukraine, A.V. Savin, Russia, and F.M.
Izrailev, Russia
Coordinator: G.P. Tsironis
Sponsor: INTAS
 "Energy localization and collapse with applications" (199497)
Collaboration between: P.L. Christiansen, Denmark,
V.E. Zakharov, Russia, E.A. Kuznetsov, Russia,
S. Turitsyn, Russia,
J. Juul Rasmussen, Denmark, and Y. Pomeau, France
Coordinator: P.L. Christiansen
Sponsor: INTAS
 "SelfTrapping and Superconductivity" (199497)
Collaboration between: E.N. Economu, Greece, G.P. Tsironis,
Greece
, P.L. Christiansen, Denmark,
J. C. Eilbeck, UK, S. Aubry, France,
A.V.Zolotaryuk, Ukraine, V.G. Baryakhtar, Ukraine ,and
A.V. Savin, Russia
Coordinator: E.N. Economu
Sponsor: INTAS
 "Nonlinear approach to coherent and fluctuating processes in condensed
matter and optical physics" (199396)
Collaboration between:
E.N. Economu, Greece , G.P. Tsironis, Greece ,
T. Bountis, Greece ,
S. Aubry, France,
F. Fillaux, France , R.S. MacKay, UK,
L.M.Floría, Spain,
J.M. Sacho, Spain, L. Vázquez, Spain ,
R. Manella, Italy,
and P.L. Christiansen,
Denmark
Coordinator: E.N. Economu
Sponsor: EEC Human Capital and Mobility Programme
 "Classical and quantum chaos in coupled, nonlinear oscillators"
(199092)
Collaboration between: J.C. Eilbeck, UK, D.W. McLaughlin, USA
, and
P.L. Christiansen, Denmark
Coordinator: J.C. Eilbeck
Sponsor: NATO Scientific Affairs Division
 "Transport properties in nonlinear condensed matter physics"
(198993)
Collaboration between: P.L.
Christiansen, Denmark, G. Careri, Italy, S. Pnevmatikos and
G.P. Tsironis, Greece,
S. Aubry, France, J.C. Eilbeck, UK, and G. Zundel,
Germany
Coordinator: P.L. Christiansen
Sponsor: EEC Science Programme

"Stimulated Nonlinear Effects in Josephson Devices" (198790)
Collaboration between: G. Reinisch, France and P. Encranez, France,
M. Russo, Italy,
G. Costabile, Italy, N.F. Pedersen, Denmark,
P.L. Christiansen, Denmark, and S. Pnevmatikos, Greece
Coordinator: G. Reinisch
Sponsor: EEC Stimulation Programme
 "Joint research project between IBM and LAMF, DTU" (198590)
Research Collaboration between: P.L. Christiansen, Denmark, M.P. Sørensen,
Denmark and Switzerland and T. Schneider, Switzerland
Organizer: Johan Teglhøj, IBM Denmark
Sponsor: IBM Denmark and IBM Zürich Research Laboratory
 "Coherence and Chaos Phenomena in the Josephson Oscillator" (198589)
Collaboration between: P.L. Christiansen, Denmark, R.D. Parmentier, Italy, and
and O. Skovgaard, Denmark
Contractor: P.L. Christiansen
Sponsor: United States Army European Research Office, London
 "Computer Dynamics Study of Nonlinear Interaction in Protein
Models" (198587)
Collaboration between: P.L. Christiansen, Denmark and G. Careri,
Italy
Coordinator: P.L. Christiansen
Sponsor: EEC Stimulation Programme

"Nonlinear wave phenomena in Josephson elements for superconducting electronics"
(198285)
Collaboration between: P.L. Christiansen, Denmark, R.D. Parmentier,
Italy, and
and O. Skovgaard, Denmark
Contractor: P.L. Christiansen
Sponsor: United States Army European Research Office, London
Formal Collaboration Agreements
 Optical Sciences Centre, Australian National University, Canberra
 Center for Advanced Studies, University of New Mexico, Albuquerque, USA
 Centre National de Recherche Scientifique, Paris, France
 Danish Institute for Fundamental Metrology, Lyngby, Denmark
 IBM Zürich, Switzerland
 Landau Institute for Theoretical Physics, Moscow, Russia
 Department of Mathematics, University of Naples, Italy
 Department of Theoretical Physics, Institute of Metallurgy, Kiev, Ukraine
 Mathematics Department, HeriotWatt University, Edinburgh, Scotland
 Mathematics Department, University of Arizona, Tucson, USA
 Center for Nonlinear Studies, Los Alamos National Laboratory, USA
 Institute for Theoretical Physics, Kiev, Ukraine
 Physics Department, Academy of Sciences, Tashkent, Ukraine
Organization of International Conferences and Workshops
 Official Inauguration of the Center for
"Modelling, Nonlinear Dynamics, and Irreversible Thermodynamics", DTU,
4 December, 1985, organized by Peter L. Christiansen
Invited speaker: David K. Campbell, Center for Nonlinear Studies, Los Alamos National
Laboratory
About 100 participants
Sponsor: Thomas B. Thriges Foundation
 Structure Coherence and Chaos in Dynamical Systems, DTU, Lyngby,
1216 August, 1986, organized by Peter L. Christiansen, R. D. Parmentier, and
A. C. Scott
31 invited speakers and 80 posters. 159 participants from 23 countries
Sponsors: U S Army European Research Office, Danish Natural Science Research
Council, Danish Technical Research
Council, Thomas B. Thriges Foundation, Otto Mønsteds Foundation,
IBM Denmark A/S, NORDITA, and MIDIT
 NATO Advanced Research Workshop on SelfTrapping of Vibrational Energy,
in Protein, Hanstholm, Denmark, 30 July4 August 1989 , organized by
Alwyn C. Scott and Peter L. Christiansen
38 lectures and 8 posters. 43 participants from 14 countries
Sponsors: NATO Scientific Affairs Division, Special Programme on "Chaos, Order
amd Patterns" and Danish Natural Science Research Council
 1st European Science Foundation NonLinear Systems Study Centre
on Transport Properties in NonLinear Condensed Matter Physics, MIDIT,
Lyngby, Denmark, 725 August, 1989, organized by Peter L. Christiansen and Alwyn C. Scott
Sponsor: European Science Foundation, Network on Nonlinear Systems
41 lectures and 18 discussion hours. 45 participants from 15 countries
 Future Directions of Nonlinear Dynamics in Physical and Biological
Systems, DTU, Lyngby, Denmark, 23 July  1 August, 1992, organized by
Peter L. Christiansen and Robert D. Parmentier
49 speakers and 100 posters. 168 participants from 23 countries
Sponsors: NATO Scientific and Environmental Affairs Division,
U S Army European Research Office, U S Army American Research Office,
National Science Foundation, Danish Technical Research Council,
NORDITA, COWI Foundation, and DTU (MIDIT)
 ICCP'94 IMACS 3rd International Conference on Computational Physics:
Nonlinear Dynamical Phenomena in Physical, Chemical and Biological Systems, DTU,
Denmark,
14 August, 1994 organized by Peter L. Christiansen, Erik Mosekilde,
and Mads Peter Sørensen
39 speakers and 15 posters. 72 participants from 17 countries
Sponsors: Danish Natural Science Research Council, Danish Technical Research
Council, COWI Foundation, and Technical University of Denmark (MIDIT)
 Complex Dynamics in Spatially Extended Systems, Niels Bohr
Institute,
Copenhagen, Denmark, 2730 September, 1995, organized by Tomas Bohr, Jens Juul Rasmussen,
Erik Mosekilde, and Peter L. Christiansen
51 speakers and 48 posters. 126 participants from 19 countries.
Sponsors: Danish Natural Science Research Council, Danish Technical Research
Council, Thomas B. Thriges Foundation, the Niels Bohr Foundation, Center for
Chaos and Turbulence Studies (CATS) at the Niels Bohr Institute, Center for Nonlinear
Dynamics in Continuum Systems at Risø National Laboratory, and Modelling,
Nonlinear dynamics, and Irreversible Thermodynamics (MIDIT) at Technical University of
Denmark
 Solitons and Coherent Structures in Physics and Biology, DTU, Lyngby,
30 May  3 June, 1997, organized by Peter L. Christiansen and Mads Peter
Sørensen.
53 speakers and 15 posters. 75 participants from 20 countries.
Sponsors: Danish Technical Research Council, Danish Natural Research Council,
Thomas B. Thriges Foundation, Risø National Laboratory and MIDIT, DTU
Conference Participations with Presentations
(presented by the (first) author in the parenthesis after the title)
 "Scattering of Short Electromagnetic Waves by a Circular Cylinder of
Warm Plasma" (P. L. Christiansen) URSI Symposium on Electromagnetic Wave Theory,
September 611, 1965, Delft, Holland
 "Diffraction of a Creeping Wave by a Discontinuity in the Surface Impedance
of a Smooth Body" (P. L. Christiansen) URSI Spring Meeting, April 1821, 1966,
Washington, DC, U.S.A.
 "Excitation of Creeping Waves by Mode Conversion of a Critically Incident
Ray" (P. L. Christiansen) GAP International Symposium, October 1719, 1967,
Ann Arbor, Michigan, U.S.A
 "Resonant Interaction Approach and Slowly Varying Approach in Nonlinear Wave
Propagation" (P. L. Christiansen) URSI Symposium on Electromagnetic Waves,
June 2030, 1969, Stresa, Italy (invited talk)
 "Surface Diffraction and Mode Conversion" (P. L. Christiansen) SIAM
National Meeting, June 29July 1, 1970, Denver, Colorado, U.S.A.
 "Elementary Diffraction Coefficients in the Geometrical Theory of
Diffraction" (P. L. Christiansen) International Symposium on Electromagnetic
Wave Theory, September 915, 1971, Tbilisi, U.S.S.R.
 "Geometical Diffraction Theory: Application of Elementary Diffraction
Coefficients and Uniform Representations" (in Danish) (P. L. Christiansen)
Radiovetenskaplig Konferens 72, May 2931, 1972, Lund
 "Current Electromagnetic Research in Denmark" (P. L. Christiansen)
International IEEE/GAP Symposium and USNC/URSI Meeting, August 2124, 1973,
Boulder, Colorado, U.S.A. (invited talk)
 "Diffraction of Gravity Waves by Large Islands" (P. L. Christiansen)
14th International Conference on Coastal Engineering, June 2428, 1974,
Copenhagen
 "Diffraction of Creeping Waves by an Edge" (N. C. Albertsen and P. L.
Christiansen) URSI Symposium on Electromagnetic Wave Theory, July 912, 1974,
London
 "Application of Ray Methods for Computation of Water Waves on Varying
Sea Depth and in Harbours" (in Danish) (P. L. Christiansen) Symposium i
Tillämpad Matematik, "Behandlingsmetoder för differentialekvationer
och angränsande problem", April 24, 1975, Gothenburg
 "Computations of Harbor Oscillations by Ray Methods" (J. Larsen and P. L.
Christiansen), Symposium on Modeling Techniques, September 35, 1975, San
Francisco, California, U.S.A.
 "Diffraction of Gravity Waves by Ray Methods" (P. L. Christiansen) IUTAM
Symposium on Surface Gravity Waves on Water of Varying Depth, July 2023, 1976,
Canberra, Australia (invited talk)
 "Numerical Investigation of Creeping Waves in Water Wave Theory" (P. L.
Christiansen and H. Bach) GAMM/DCAMM Congress, May 31June 3, 1977, DTU,
Lyngby
 "On Dynamical TwoDimensional Solutions to the SineGordon Equation"
(P.L. Christiansen and O.H.Olsen) GAMM Annual Scientific Conference,
March 2831, 1978, Bruxelles, Belgium
 A Bäcklund Transformation for the 3+1 Dimensional SineGordon
Equation" (P.L. Christiansen) 8th International Conference on Nonlinear
Oscillations,
September 1115, 1978, Institute of Thermodynamics, Czechoslovak Academy
of Sciences, Prague, Czechoslovakia
 "Application of a new Bäcklund Transformation for the 3+1 Dimensional
SineGordon Equation" (P.L. Christiansen) GAMM Annual Scientific Conference,
April 1621, 179, Wiesbaden, Germany
 "Soliton and QuasiSoliton Solutions to the SineGordon Equations"
(P.L. Christiansen and O. H. Olsen) Danish Physical Society Spring meeting,
May 2829, 1979, Middelfart, Denmark
 "Soliton and QuasiSoliton Solutions to the SineGordon Equation"
(P.L. Christiansen) 4th Scheveningen Conference on Differential Equations,
August 2331, 1979, Scheveningen, Holland (invited talk)
 "Two and ThreeDimensional Solitons" (P.L. Christiansen) Engineering
Foundation Conference on New Approaches to Nonlinear Problems in Dynamics,
December 914, 1979, Pacific Grove, California, U.S.A.
 "Two and ThreeDimensional Solitons" (P.L. Christiansen) International
Conference on Nonlinear Dynamics, December 1721, 1979, The New York Academy
of Sciences, New York, U.S.A.
 "Fluxons on Imperfect Josephson Lines" (P.L. Christiansen and O. H. Olsen)
Danish Physical Society Spring Meeting, May 3031, 1980, Elsinore, Denmark
 "SineGordon Solitons on Josephson Lines and in 2+1 and 3+1 Dimensions"
(P.L. Christiansen) Workshop on Nonlinear Evolution Equations and Dynamical
Systems, July 923, 1980, Chania, Crete, Greece
 "Bunched Multisolitons on Long Josephson Junction Oscillators"
(P.L. Christiansen, P. Lomdahl, and O. H. Sørensen) Danish Physical
Society Spring Meeting 1981, May 2122, 1981, Risø National Laboratory
 "Soliton Dynamics and Zero Field Steps in Josephson Tunnel Junction"
(P.L. Christiansen, P. Lomdahl, and O. H. Sørensen) Nordic Solid State
Physics Conference, August 1012, 1981, H. C. Ørsted Institute,
University of Copenhagen, Denmark
 "Fluxon Dynamics in Intermediate Length Josephson Tunnel Junctions"
(O. H. Sørensen, P. Lomdahl, and P.L. Christiansen) XVI International
Conference on Low Temperature Physics, LT16, August 1925, 1981, University
of California, Los Angeles, U.S.A. P. Lomdahl, and O. H. Sørensen)
 "Reverse Bifurcation for Difference Equations" (P.L. Christiansen)
Workshop on Nonlinear Evolution Equations Solitons and Spectral Methods,
August 2429, 1981, International Centre for Theoretical Physics, Trieste, Italy
 "1+1 and 2+1 Dimensional SineGordon Solitons" (P.L. Christiansen)
Workshop on Nonlinear Evolution Equations Solitons and Spectral Methods,
August 2429, 1981, International Centre for Theoretical Physics, Trieste, Italy
 "On Chaos and Reverse Bifurcations in Discrete Systems and
QuasiSolitons on Elastic Rods" (P.L. Christiansen) Nonintegrable Systems and
Transition to Chaos, April 1516, 1982, Culham Laboratory, Oxford, England
 "SineGordon Application to Josephson Junctions" (P.L. Christiansen)
International Conference on Solitons in Real Systems, June
1726, 1982, Nice and Cargèse, France (invited talk)
 'Transition to Chaos: Forward and Reverse Bifurcations" (P.L. Christiansen)
International Conference on Solitons in Real Systems, June
1726, 1982, Nice and Cargèse, France (invited talk)
 "SineGordon Solitons I" (P.L. Christiansen) Second World Conference on
Mathematics at the Service of Man, June 28July 3, 1982, Canary Islands, Spain
(invited talk)
 "Chaos in Discrete Systems. SineGordon Solitons II" (P.L. Christiansen)
Second World Conference on Mathematics at the Service of Man, June 28July 3,
1982, Canary Islands, Spain (invited talk)
 "SineGordon Solitons" (P.L. Christiansen) Solitons '82 Scott Russell
Centenary Conference, August 22September 3, 1982, Edinburgh, Scotland
(invited talk)
 SineGordon Solitons and Josephson Junctions" (P.L. Christiansen) Integrable
Seminar, NORDITA, September 1324, 1982 Copenhagen, Denmark
 "Solitons on Mechanical Structures" (P.L. Christiansen) Euromech 166:
Focussing of Mechanical Waves in Continuous Media, March 2830, 1983, Aachen,
West Germany (invited talk)
 "Solitons Illustrated by Computer Movie" (P.L. Christiansen) Wave Phenomena:
Modern Theory and Applications and Canadian Applied Mathematical Society Annual
Meeting (Satellite Meetings on Asymptotic Expansions and Bifurcation Problems),
June 2024, 1983, Toronto University, Canada (invited talk)
 "Chaos in Nerve" (J.H. Jensen, P.L. Christiansen, A.C. Scott,
and O. Skovgaard) ACI 83, Applied Control & Identification, June 28July 1,
1983, Copenhagen
 "Solitons and Chaos Phenomena on Long Josephson Junctions"
(P.L. Christiansen) Working Party on Solitons and Nonlinear Phenomena in
Condensed Matter, JulyAugust, 1983, International Centre for Theoretical
Physics, Trieste, Italy (invited talk on August 9, 1983)
 "Solitons and Chaos in Nearly Integrable Systems" (P.L. Christiansen)
2nd Workshop on Evolution Equations and Dynamical Systems, August 1326, 1983,
Chania, Crete, Greece
 "Aspects of Modern Nonlinear Dynamics. Solitons and Chaos Phenomena"
(P.L. Christiansen) URSI International Symposium on Electromagnetic Theory,
August 2326, 1983, Santiago de Compostela, Spain (invited general lecture)
 "The SineGordon System. Solitons and Chaos" (P.L. Christiansen) Solitons
Physics, November 712, 1983, Georgenthal, DDR (invited talk)
 "Solitons and Chaos in the Josephson Oscillator" (P. L. Christiansen)
Danish Physical Society Spring Meeting 1984, Elsinore, Denmark, May 2930, 1984
 "Solitons and Chaos in Dynamical Systems" (O. Skovgaard, Peter L.
Christiansen, F. If
and M. P. Sørensen) 16th International Congress on
Theoretical and Applied Mechanics, August 1925, 1984, Lyngby, Denmark
 "Solitons and Chaos in the SineGordon System" (P. L. Christiansen)
International Symposium
on Selected Topics in Statistical Mechanics, August 2226, 1984, Dubna, U.S.S R.
(invited talks)
 "Solitons and Chaos in the SineGordon System" (P. L. Christiansen)
7th Kyoto Summer Institute "Dynamical Problems in Soliton Systems",
August 2731, 1984, Kyoto, j
Japan (invited talk)
 "Xband Radiation from Josephson Junctions in Magnetic Field"
(M. P. Sørensen, R. D. Parmentier, P. L. Christiansen, O. Skovgaard,
B. Dueholm,
E. Jørgensen, V. P. Koshelets, O. A. Levring,
R. Monaco, J. Mygind, N. F. Pedersen, and M. R. Samuelsen) Applied
Superconductivity Conference 1984, September 913, 1984, San Diego, U.S.A.
(poster)
 "Solitons and Chaos In Josephson Junctions" (P. L. Christiansen) Danish
Physical Society, Solid State Physics Section, Winter School, January 2831,
1985, H. C. Ørsted Institute, University of Copenhagen (invited talk)
 "Fractal dimensions for solutions to lowdimensional discrete
selftrapping equation" (P. L. Christiansen, J. Halding, and O. Skovgaard)
Danish Physical Society, Spring Meeting 1985, May 1415, 1985, The Niels
Bohr Institute, University of Copenhagen
 "Prediction of chaos in a Josephson junction by the Melnikov technique" (M.
Bartuccelli, P. L. Christiansen, and N. F. Pedersen) Danish Physical Society,
Spring Meeting 1985, May 1415, 1985, The Niels Bohr Institute, University of
Copenhagen
 "Application of soliton effects" (P. L. Christiansen) 3rd Workshop on
Nonlinear Evolution Equations and Dynamical Systems, June 20July 5, 1985.
Baia Verde Gallipoli, Italy (invited talk)
 "On coherence and chaos in a physical system" (P. L. Christiansen) 11th
IMACS World Congress on System Simulation and Scientific Computation,
August 59, 1985, University of Oslo (invited talk)
 "Solitons and chaos in a physical system" (P. L. Christiansen) Nordic
Symposium on Nonlinear waves in Plasmas, August 1316, 1985,
Risø National Laboratory (invited talk)
 "Solitons and chaos in the sineGordon system (P. L. Christiansen)
10th Summer School in Mathematical, September 424, 1985, Ravello,
Italy (invited talk)
 "Solitons and chaos in the sineGordon system (P. L. Christiansen)
3rd Meeting on Waves and Stability in Continuous Media, October 712, 1985, Bari, Italy
(invited talk)
 "Stability of Dynamic States in Josephson Junctions" (P. L. Christiansen,
S. Pagano, M. P.
Sørensen, R. D. Parmentier, F. If, M. Fordsmand, O. Skovgaard, J. Mygind,
N. F. Pedersen, and M. R. Samuelsen) Workshop on SpatioTemporal Coherence and
Chaos in
Physical Systems, January 2124, 1986, Center for Nonlinear Studies, Los Alamos National
Laboratory, N.M., U.S.A. (invited poster)
 "The soliton laser" (P. L. Christiansen, F. If, J. N. Elgin, J. D. Gibbon,
and O. Skovgaard) Workshop on SpatioTemporal Coherence and Chaos in
Physical Systems, January 2124, 1986, Center for Nonlinear Studies, Los Alamos National
Laboratory, N.M., U.S.A. (poster)
 "Modelling of Temperature Effects on the Ion Permeability and Bilayer
Lipid Membranes" (L. Cruzeiro, P.L. Christiansen, and O.G. Mouritsen) Workshop
Faraday Discussion No. 81  Lipid Vesicles and Membranes, April 1517, 1986,
Loughborough, U.K. (poster)
 "Computer Dynamics Study of Nonlinear Interaction in Protein Models"
(P.L. Christiansen) EECStimulationActionContractors Conference, May 56, 1986, Bruxelles,
Belgium (invited talk)
 "Coherent Excitations in Some Physical and Biological Systems"
(P.L. Christiansen) 9th Dundee Conference on the Theory of Ordinary
Differential Equations, June 30July 4, 1986, Dundee University, Scotland
(invited talk)
 "Numerical Model of Mollenauer's Soliton Laser (F. If, P. Berg, P. L.
Christiansen and O. Skovgaard) MIDIT 1986 Workshop on Structure, Coherence and
Chaos in
Dynamical Systems, August 1216, 1986, DTU, Lyngby (poster)
 "Subharmonic and Heteroclinic Bifurcations in a Pendulum with Variable
Length (V. Muto, M. Bartuccelli, P. L.
Christiansen, M.P. Sørensen, and N.F. Pedersen) MIDIT
1986 Workshop on Structure, Coherence and Chaos in
Dynamical Systems, August 1216, 1986, DTU, Lyngby (poster)
 "Stability of Dynamical States in Josephson Junctions" (S. Pagano, R.D.
Parmentier, P. L.
Christiansen, F. If, M. Fordsmand, and O. Skovgaard) MIDIT
1986 Workshop on Structure, Coherence and Chaos in
Dynamical Systems, August 1216, 1986, DTU, Lyngby (poster)
 "Instabilities and Chaos in Josephson junctions" (P.L. Christiansen)
Workshop on Nonlinear Dynamics and Chaos, August 2530, 1986, Thessaloniki,
Greece
 "Perturbation of Integrable Systems and the Melnikov Method"
(P.L. Christiansen) EUROMECH 216, Integrable Systems in Nonlinear Analytical
Mechanics, September 2225, 1986, Leeds University, U.K.
 "Temperature Stability of Davydov Solitons" (L. Cruzeiro, P.L. Christiansen,
J. Halding,
O. Skovgaard, and A.C. Scott) Physics in Biology, November 1213, 1986, DTU,
Lyngby (poster)
 "Lipid membrane Phase Transitions and Ion Permeability (L. Cruzeiro,
P.L. Christiansen, and
O.G. Mouritsen) Physics in Biology, November 1213, 1986, DTU,
Lyngby (poster)
 Temperature Stability of Davydov Solitons (L. Cruzeiro, P.L. Christiansen,
J. Halding,
O. Skovgaard, and A.C. Scott) NATO ARW Workshop Chaos in Biological Systems, December 812, 1986, Cardiff,
U.K. (poster)
 "Instabilities in Josephson Junction Lines, (P.L. Christiansen) First
Workshop of the EEC Josephson Project, May 2022, 1987, La Brigue, France
 "How Stable are Strongly Nonlinear Solitons?" (P.L. Christiansen)
12th Summer School of Mathematical Physics, September 1426, 1987, Ravello,
Italy
 "Solitary Waves on Nonlinear Elastic Rods" (P. L. Christiansen, Mads Peter
Sørensen, and Virginia Muto) IUTAMIUPAP Symposium on Elastic Wave
Propagation, University College, Galway, Ireland, March 2025, 1988
 "Stability of SineGordon Solitons" (P.L. Christiansen) 4th Meeting on
Waves and Stability in Continuous Media, October 510, 1987, Taormina, Italy
(invited speaker)
 "Nonlinear Interactions between Intra and InterMolecular Vibrations in
HydrogenBonded Polypeptide Chains" (B. M. Pierce, N. Østergaard,
O. Faurskov Nielsen, and P. L. Christiansen) Nordiske Molekylfysikdage,
May 2627, 1988, Fuglsøcentret, Mols, Denmark
 "Stability of SineGordon Solitons" (P.L. Christiansen) 2nd Nordic
Symposium on Nonlinear Phenomena in Plasmas and Related Topics, August 812,
1988, Risø National Laboratory
 "Nonlinear Dynamics of the Josephson Junction (P.L. Christiansen and
Niels Falsig Pedersen) Singular Behaviour and Nonlinear Dynamics, August 1226,
1988, Samos, Greece
 "A Toda Lattice Model for DNA: Thermally Generated Solitons" (V. Muto,
P.L. Christiansen, and A. C. Scott) 5th Annual University of California
Conference on Nonlinear science, March 34, 1989, San Diego, U.S.A. (poster)
 "A Generalized Discrete SelfTrapping Equation" (P.L. Christiansen, and
A. C. Scott) 5th Annual University of California Conference on Nonlinear
Science, March 34, 1989, San Diego, U.S.A. (poster)
 "Higher Order NonLinearities in Small Molecules: Classical and Quantum
Mechanical Description" (P.L. Christiansen) International Conference on
Nonlinear Physics, April 2330, 1989, Shanghai, China
 "Solitons in Biology. Ring Solitons" (P.L. Christiansen) Study Group
meeting on Nonlinear Dynamical Properties of Ordered Molecular Layers and Cell
Membranes, May 2527, 1989, Capri, Italy
 "A Toda lattice Model of DNA" (P.L. Christiansen) 6th Interdisciplinary
Workshop on Nonlinear Coherent Structures in Physics, Mechanics and Biological
Systems, June 2123, 1989, Montpellier, France
 "The generalized DST equation" (P.L. Christiansen) NATO/MIDIT Advanced
Research Workshop, July 30August 4, 1989 Hanstholm, Denmark, 1989
 "Solitons in Optical Fibres" (P.L. Christiansen) Venice1 Symposium on
Applied and Industrial Mathematics, October 26, 1989, Venice, Italy
 "Solitary Waves on a Toda Lattice with a Transverse Degree of Freedom"
(P.L. Christiansen) 5th International Conference on Waves and Stability in
Continuous Media, October 914, 1989, Sorrento, Italy
 "Toda Lattice Models for DNA" (P.L. Christiansen) Transport Properties
of Nonlinear Condensed Matter Systems, April 1921, 1990, Heraklion, Crete,
Greece
 "A Toda Lattice Model for DNA" (P.L. Christiansen) Nonliner and Chaotic
Phenomena in Plasma, Solids, and Fluids, July 1627, 1990, University of Alberta
Edmonton, Canada
 "Application of the BäcklundTakhtajan Transformation to the
SineGordon System" (P.L. Christiansen) NATO Applied Research Workshop on
Superconducting Electronics and II Workshop on Josephson Devices,
September 37, 1990, Capri, Italy
 "Chaos and Quantum Mechanics of the DST Equation" (P.L. Christiansen)
International Workshop "Nonlinearity with Disorder", Thermophysics Department
of Uzbek Academy of Sciences, October 17, 1990, Tashkent, Uzbekistan
 "Perturbed Pitchfork Bifurcations in BCS Gap Equation" (P. L. Christiansen
and M. P. Sørensen) Workshop on EC Activities in High Temperature
Superconductivity, November 2627, 1990, Strasbourg, France
 "On Localization of Energy in Biomolecules" (P.L. Christiansen) RCP 264
Montpellier Nonlinéaire 1990 Interdisciplinary Meeting on Nonlinear
Evolutions and Inverse Methods, November 30December 4, 1990, Montpellier,
France
 "Melting of DNA in a Toda Lattice Model" (P.L. Christiansen) Aspects of
Nonlinear Dynamics: Solitons and Chaos, Vrije Universiteit, December 68,
1990, Bruxelles, Belgium
 "Concepts of LowDimensional, Incompressible, Rotating Fluid Flow"
(E.A. Christensen and P.L. Christiansen) Aspects of Nonlinear Dynamics:
Solitons and Chaos, Vrije Universiteit, December 68,
1990, Bruxelles, Belgium
 "Coherent and Emergent Phenomena in Biomolecules" (P.L. Christiansen)
NATO Advanced Research Workshop "What is life and where is it going?",
The University of Arizona, January 1519, 1991, Tucson, U.S.A.
 "Application of DST on Scheibe Aggregates" (P.L. Christiansen)
NATO Advanced Research Workshop "Proton Transfer in HydrogenBonded Systems",
May 2125, 1991, Heraklion, Crete, Greece (invited talk)
 "Blowup in a Nonlinear Model of LangmuirBlodgett Scheibe Aggregates"
(P.L. Christiansen) 6th International Conference on Waves and Stability in
Continuous Media, May 27June 1, 1991, Acireale, Sicily, Italy (invited talk)
 Chaos and Quantum Theory for the Discrete SelfTrapping Equation" (P.L.
Christiansen) NATO Advanced Research Workshop "Quantum Chaos  Theory and
Experiment", The Niels Bohr Institute, May 25June 1, 1991, Copenhagen (invited
talk)
 "A Discrete Nonlinear Model of Scheibe Aggregates" (P.L. Christiansen)
7th Interdisciplinary Workshop on Nonlinear Coherent Structures in Physics
and Biology, June 46, 1991, Dijon, France
 Blowup in the Continuum Limit of a 2D Toda Lattice" (P.L. Christiansen)
NATO Advanced Research Workshop "Singular Limits of Dispersive Waves",
July 812, 1991, Lyon, France (invited talk)
 Classical and Quantum Mechanical Order and Chaos in the Discrete
SelfTrapping Equation" (P.L. Christiansen) NATO Advanced Study Institute
Chaotic Dynamics: Theory and Practice", July 1120, 1991, Patras, Greece
(invited talk)
 "Intermittency Between Soliton Dynamic States" (P.L. Christiansen)
USSR/DK Seminar on Superconducting Electronics, December 1617, 1991,
Moscow, Russia
(invited talk)
 "Solitary Wave Solutions to a System of Boussinesqlike Equations" (P.L.
Christiansen) 4th International Conference on Hyperbolic Problems,
April 38, 1992, Taormina, Italy
 "DNA Models" (P.L. Christiansen) Future Directions in Physical and
Biological Systems, July 23August 1, 1992, DTU, Lyngby (invited)
 "Nonlinear Models of High T_{c} Superconductivity"
(P.L. Christiansen)
High Temperature Superconductivity Projects Supported in the Community R & D
Programmes, November 23, 1992, Strasbourg, France (invited)
 "On the Switching Between Soliton Dynamic States in Long Josephson
Junctions" (P.L. Christiansen) Workshop on Josephson Junctions, April 29May 2,
1993 Heraklion, Greece (invited talk)
 "On Compact and Noncompact Integrable Systems" (P.L. Christiansen)
NATO Advanced Research Workshop "Nonlinear Coherent Structures in
Physics and Biology, June 14, 1993, University of Bayreuth, Germany
(invited talk)
 "An Application of the HénonHeiles System to Davydov Solitons"
(P.L. Christiansen) NATO Advanced Study Institute "Real and Complex
Dynamical Systems", June 20July 2, 1993, Hillerød, Denmark (poster)
 "Solitary Wave Solutions to a System of Boussinesq
Equations" (P.L. Christiansen) IUTAM Symposium on Nonlinear Waves in Solids,
August 1520, 1993, University of Victoria, BC, Canada (invited talk)
 Subcritical Localization in the Discrete Nonlinear Schrødinger
Equation with Arbitrary Power Nonlinearity"
(P.L. Christiansen, O. Bang and J. Juul Rasmussen) NATO Advanced Study
Institute "Chaos, Order and Patterns. Aspects of Nonlinearity, The Gran
Finale", September 510, 1993, Como, Italy (poster)
 "Competition between blowup and discreteness" (P.L. Christiansen)
1st Nordic Nonlinear Days, January 1214, 1994, Hensinki, Finland (invited talk)
 "The DSTequation and selftrapping of energy" (P.L. Christiansen) EU
Euroconference programme "Applied Nonlinear Dynamics", June 30July 4, 1994,
Centre de Physique des Houches, France (invited talk)
 "Collapse and fluctuations in the nonlinear Schrödinger equation"
(P.L. Christiansen) International Workshop "Nonlinear Schrödinger Equation
1994, July 25August 3, 1994, Landau Institute, Chernogolovka, Russia (invited
talk)
 "Blowup and thermal fluctuations in the nonlinear Schrödinger
equation" (P.L. Christiansen) Fluctuation Phenomena: Disorder and Nonlinearity,
September 2629,
1994, San Lorenzo de El Escorial, Madrid, Spain (invited talk)
 "The influence of noise on critical collapse in the nonlinear
Schrödinger equation" (K. Ø. Rasmussen, Y. B. Gaididei, O.
Bang, and P. L. Christiansen) 3rd IMACS International Conference on
Computational Physics, Nonlinear Dynamical Phenomena in Physical, Chemical
and Biological Systems, August 14, 1994, Lyngby, Denmark (poster)
 "Blowup and thermal fluctuations in the nonlinear Schrødinger
equation" (P.L. Christiansen) Nonlinear Coherent Structures in Physics and
Biology, July 1014, 1995, HeriotWatt University, Edinburgh, Scotland (invited
talk)
 "Applications of the NLS equation" (P.L. Christiansen) Euroconference
Nonlinear KleinGordon and Schrödinger Systems: Theory and Applications,
September 2530, 1995, San Lorenzo de El Escorial, Madrid, Spain (invited
talk)
 "Blowup and temperature effects in the nonlinear Schrödinger equation
(P.L. Christiansen) Eurolights II  Light on Organized Molecular Systems,
December 48, 1995, Hengelhoef, Belgium
 "Nonlocal Dispersive Interactions in Discrete Nonlinear Schrödinger
Model" (K.Ø. Rasmussen, P.L. Christiansen, Yu.B. Gaididei, and S.F.
Mingaleev) Nordic Statistical Physics Workshop, May 911, 1996, NORDITA,
Copenhagen, Denmark (poster)
 "White Noise and Nonlinear Damping in the TwoDimensional Model
of Energy Transfer in Molecular Systems" (I.I. Yakimenko, P.L. Christiansen,
M. Johansson, K.Ø. Rasmussen, and Yu. B. Gaididei) 9th Conference of
the European Consortium for Mathematics in Industry, June 2529, 1996, DTU,
Lyngby, Denmark
 "Collapse and thermal noise in nonlinear systems" (P.L. Christiansen)
EUROMECH 348 Nonlinear Dynamics of Heterogeneous and Microstructured Solids,
May 2226, 1996, Tallinn, Estonia
 "A nonlinear model of temperature dependent dynamics of organic films"
(P.L. Christiansen) Nordic Nonlinear Days: Complexity, Coherence and NonEquilibrium
Systems, August 2427, 1996, Krogerup Højskole, Humlebæk, Denmark (invited
speaker)
 "Collapse and thermal fluctuations in continuous and discrete systems"
(P.L. Christiansen) International Conference on Fluctuations, Nonlinearity and
Disorder, September 30October 4, 1996, Heraklion, Crete, Greece (invited talk)
 " Nonlocal Dispersive Interactions in Discrete Nonlinear Schrödinger
Equation" (Yu.B. Gaididei, S.F. Mingaleev, P.L. Christiansen, and K.Ø.
Rasmussen) International Conference on Fluctuations, Nonlinearity and
Disorder, September 30October 4, 1996, Heraklion, Crete, Greece (poster)
 "Coherent Excitations in One and TwoDimensional Molecular Structures"
(P.L. Christiansen) Ariatico Research Conference: "Nonlinear Cooperative
Phenomena in Biological Systems", August 1922, 1997, International Centre for
Theoretical Physics, Trieste, Italy (invited talk)
 "Collaboration with Bob Parmentier" (P.L. Christiansen) Workshop
"Nonlinear Dynamics and the Josephson Effect", September 5, 1997, Salerno,
Italy (invited talk)
 "Energy transduction in biomolecules: A model for energy storage and
transport" (P.L. Christiansen, M. Johansson, Kim Rasmussen, and Yu. B. Gaididei)
and "Effects of longrange dispersion in nonlinear dynamics of DNA Molecules"
(Yu. B. Gaididei, S. F. Mingaleev, P. L. Christiansen, M. Johansson,
and K. O. Rasmussen) Nonlinear Phenomena in Biology, June 2328, 1998,
Puschino, Russia (invited talk)
 "A model for energy storage and transport in biomolecules"
(P.L. Christiansen) CECAM Workshop on "Localized Excitations in Condensed
Matter and Molecular Physics", July
710, 1998, ENS, Lyon, France (invited talk)
 "Internal Instability in Fluxon Dynamics of Stacked Josephson Junctions"
(P. L. Christiansen) Nonlinear Dynamics in Josephson Junctions, 2528 October
1998, Marina di Camerota, Italy (invited talk)
Italy
 "Nonlocal Effects in Stacked Josephson Junctions" (Yu. B. Gaididei, S. F.
Mingaleev, and P. L. Christiansen) and "Internal Instability in Fluxon Dynmaics
of Stacked Josephson Junctions" (A. Bisgaard, P. L. Christiansen, M. P.
Soerensen, Yu. B. Gaididei, N. F. Pedersen, C. Gorria, and V. Muto)
5th SCENET Workshop on "Fundamental Aspects of Superconductivity for
Applications", October 2931, 1998, Ravello, Italy (2 posters)
Conference Participations without Presentations
 Princeton University Conference Meeting, Singular Perturbation Technique,
Princeton University, January 2224, 1970
 Conference on Nonlinear Waves and Solitons, University of
NewcastleuponTyne, September 69, 1976
 Applied Mathematics, Systems Analysis, and Computer Science,
Oslo and Geilo, Norway, September 1721, 1984 (Head of Danish delegation)
 New Developments in the Theory and Application of Solitons,
The Royal Society, London, November 12, 1984 (invited participant)
 Solitons, Instabilities and Chaotic Processes in Fluid
Dynamics, Cetraro, Italy, June 29July 3, 1987 (member of scientific committee
and invited participant)
 Nonlinear Excitations in Condensed Matter: Envelope Solitons,
Lake Arrowhead, California, U.S.A., November 2022, 1987
 IBM International Scientific Symposium on Computational Physics,
Bad Neuenahr, Germany, November 2426, 1987 (invited participant)
 Arizona/Los Alamos Days, Department of Mathematics, University of Arizona,
Tucson, U.S.A., February 34, 1989
 Science Day: Life Sciences, EEC, Max Planck Institute for Biochemistry,
München, Germany, June 1920, 1989
 Round Table on the Science of Complexity in European Research,
International Institute of Physics and Chemistry, Brussels, Belgium,
February 1718, 1994
 International Conference on Nonlinear Superconducting Devices and
HighT_{c} Materials, Hotel La Palma, Capri, Italy, October 813, 1994
 Organization Lines within Complexity, Workshop Supported by the European
Commission, DG XII, National Institute of Optics, University of Firenze,
Firenze, Italy, December 1013, 1994