For Imperial College Centre for Complexity Science click here
Why do we do science?
For the same reason as Glenn Gould plays piano:
There are no such things as
We shall not cease frome exploration
On the relationship between painting and art
Mathematics is painting without the brush; painting is mathematics without the chalk.Mathematics and Painting. Article first published in
Talk presented at INTERNATIONAL CONFERENCE EXCELLENCE: EDUCATION & HUMAN DEVELOPMENT, ATHENS, GREECE, 1 - 4, 2009
Interdisciplinary Science Reviews, 27, 45 (2002).
Music and painting
Two videos with
music composed by Eitan Altman
and paintings by Henrik Jeldtoft Jensen
Watercolour and Acrylic
Oxherding - HJJ08
An essay on the true emergent nature of time
Sindsvaesner og tidens egentlige natur (in Danish)
Project on Improvisation in Classical Music
Collaborative project with Guildhall School of Music and Drama
For a presentation from King's College London's Weekend February 17-19, 2017 click here
For papers describing the research click here and here.
Visions for Complexity
Talk at the Opening of the Complexity Hub Vienna – 23 May 2016
Institute and Imperial College International
Summer School and Research
Workshop on Complexity
For more information click here
Complexity, collective effects, and modelling of ecosystems:
formation, function, and instability
||The hierarchy of order
For me statistical mechanics is about understanding why the whole is different from the sum of the parts: identifying and understanding emergent properties; understanding how the combined effect of simple interactions and many degrees of freedom creates the never ending complexity we observe in our surroundings. Obviously these general questions have to be studied through concrete cases. I am fortunate to work together with a number of graduate students, research assistants and colleagues on research projects including biology, neuroscience and statistical mechanics.
The analysis of the emergence of structure in networks is a natural tool in this quest.
Nature: Ecology and Economics
Evolutionary ecology is a prototype example of dynamics of complex systems. We have developed a simple individual based model which exhibit intermittency and is able to reproduce a range of ecological observables such as the species-area law and typical species abundance distributions.
Click here for an overview poster on the properties of the Tangled Nature Model.
Below are a few preprints
The Tangled nature model with inheritance and constraint: Evolutionary ecology restricted by a conserved resource
More recently we have developed the Tangled Nature approach to study economics
Entangled economy: An ecosystems approach to modeling systemic level dynamics
and some reprints:
Diversity as a product of interspecial interactions
The species-area relationship and evolutio
Network properties, species abundance and evolution in a model of evolutionary ecology.
Tangled Nature: a model of evolutionary ecology. (J. Theo. Biol.)
Time dependent extinction rate and species abundance in the Tangled Nature model of biological evolution. (Phys. Rev. E.)
The Tangled Nature model as an evolving quasi-species model. (J. Phys. A)
On selection of the mode of evolution
Origins of evolution: Non-acquired characters dominates over acquired characters in changing environment
Modelling in creativity and music cognition using a complexity science approach:
We explore patterns in brain activity that are a result of a musician's playing. The focus in particular is to elucidate what happens when creative leaps and ingenuity occur during this playing - EEG recordings are analysed. Together with Conductor Richard Dickens and J Bhattacharya, Goldsmith.
We analyse the spatial and temporal scales of the brain by use of fMRI.
Additional interests: Kids, books, music, philosophy, painting,....
|List of publications:
Emergence of complex structure through co-evolution:
The Tangled Nature model of evoultionary ecology
(Key note lecture at the French Complex systems Societry Meeting,
Paris 25-27 Nov. 2009)
On the relation between painting and mathematics.
(Key note lecture at the conference on Excellence: Education & Human Development,
Athens, 1-4 July 2009. )
Tangled Nature: a model of evolutionary ecology.
Dynamics of complex systems: The record dynamics.
Criticality:what does it mean and is
H.J. Jensen, S. Lise, J. Lopez, M. Nicodemi, J.-F. Pinton, M. Sellito,
Phys. Rev. Lett. 84 , 3744 (2000). pdf
H.J. Jensen and M. Nicodemi, Europhysics Lett. 54, 566 (2001). pdf