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Garbage in Garbage out: Impacts of data quality on criminal network intervention
https://arxiv.org/abs/2501.01508
https://arxiv.org/abs/2501.01508
How well prepared are we to rapidly analyse a new influenza pandemic? A brief perspective on analysis conducted for UK government advisory groups during COVID-19
https://epiverse-trace.github.io/posts/covid-analysis/
https://epiverse-trace.github.io/posts/covid-analysis/
Epiverse-TRACE developer space
How well prepared are we to rapidly analyse a new influenza pandemic? A brief perspective on analysis conducted for UK government…
A place for Epiverse-TRACE developers to share their reflections, learnings, and showcase their work.
Network theory and Bach's music
When you listen to music, does your ability to remember or anticipate the piece tell you anything about its structure? Physicists at the University of Pennsylvania developed a model based on network theory to do just that, describing their work in a February paper published in the journal Physical Review Research. Johann Sebastian Bach's works were an ideal choice given the highly mathematical structure, plus the composer was so prolific, across so many very different kinds of musical compositions—preludes, fugues, chorales, toccatas, concertos, suites, and cantatas—as to allow for useful comparisons.
https://physics.aps.org/articles/v17/21
https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.013136
When you listen to music, does your ability to remember or anticipate the piece tell you anything about its structure? Physicists at the University of Pennsylvania developed a model based on network theory to do just that, describing their work in a February paper published in the journal Physical Review Research. Johann Sebastian Bach's works were an ideal choice given the highly mathematical structure, plus the composer was so prolific, across so many very different kinds of musical compositions—preludes, fugues, chorales, toccatas, concertos, suites, and cantatas—as to allow for useful comparisons.
https://physics.aps.org/articles/v17/21
https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.013136
The Unexpected Connection Between Brewing Coffee and Understanding Turbulence
Unconventional use of statistical mechanics sheds light on how turbulence occurs
https://today.ucsd.edu/story/coffee-and-turbulence
Unconventional use of statistical mechanics sheds light on how turbulence occurs
https://today.ucsd.edu/story/coffee-and-turbulence
Fractal scaling of trees in art
Leonardo da Vinci famously invented a so-called "rule of trees" as a guide to realistically depicting trees in artistic representations according to their geometric proportions. In essence, if you took all the branches of a given tree, folded them up and compressed them into something resembling a trunk, that trunk would have the same thickness from top to bottom. That rule in turn implies a fractal branching pattern, with a scaling exponent of about 2 describing the proportions between the diameters of nearby boughs and the number of boughs with a given diameter.
https://arxiv.org/abs/2402.13520
Leonardo da Vinci famously invented a so-called "rule of trees" as a guide to realistically depicting trees in artistic representations according to their geometric proportions. In essence, if you took all the branches of a given tree, folded them up and compressed them into something resembling a trunk, that trunk would have the same thickness from top to bottom. That rule in turn implies a fractal branching pattern, with a scaling exponent of about 2 describing the proportions between the diameters of nearby boughs and the number of boughs with a given diameter.
https://arxiv.org/abs/2402.13520
Ten research scholarships in complex systems and data science, including computational and digital epidemiology projects
https://sites.google.com/view/lagrange-fellowship
https://sites.google.com/view/lagrange-fellowship
Google
Lagrange Fellowship Call
The Lagrange Project started in 2003 and it is regarded as one of the pioneering and most innovative European projects on complex systems science and data science.
It is promoted and funded by Fondazione CRT as a part of the Lagrange Project. Scientifically…
It is promoted and funded by Fondazione CRT as a part of the Lagrange Project. Scientifically…
Teaching Assistant Professor in Social Data Science, University of Copenhagen
The Teaching Assistant Professor is expected to devote 70 percent of their time to teaching, course coordination and supervision, 10 percent to administration, and 20 percent to professional development, data management, and teaching/research synergies.
https://jobportal.ku.dk/videnskabelige-stillinger/?show=163227
The Teaching Assistant Professor is expected to devote 70 percent of their time to teaching, course coordination and supervision, 10 percent to administration, and 20 percent to professional development, data management, and teaching/research synergies.
https://jobportal.ku.dk/videnskabelige-stillinger/?show=163227
jobportal.ku.dk
Teaching Assistant Professor in Social Data Science, University of Copenhagen
Controlling the low-temperature Ising model using spatiotemporal Markov decision theory
https://arxiv.org/abs/2501.03668
We introduce the spatiotemporal Markov decision process (STMDP), a special type of Markov decision process that models sequential decision-making problems which are not only characterized by temporal, but also by spatial interaction structures. To illustrate the framework, we construct an STMDP inspired by the low-temperature two-dimensional Ising model on a finite, square lattice, evolving according to the Metropolis dynamics. We consider the situation in which an external decision maker aims to drive the system towards the all-plus configuration by flipping spins at specified moments in time. In order to analyze this problem, we construct an auxiliary MDP by means of a reduction of the configuration space to the local minima of the Hamiltonian. Leveraging the convenient form of this auxiliary MDP, we uncover the structure of the optimal policy by solving the Bellman equations in a recursive manner. Finally, we conduct a numerical study on the performance of the optimal policy obtained from the auxiliary MDP in the original Ising STMDP.
https://arxiv.org/abs/2501.03668
We introduce the spatiotemporal Markov decision process (STMDP), a special type of Markov decision process that models sequential decision-making problems which are not only characterized by temporal, but also by spatial interaction structures. To illustrate the framework, we construct an STMDP inspired by the low-temperature two-dimensional Ising model on a finite, square lattice, evolving according to the Metropolis dynamics. We consider the situation in which an external decision maker aims to drive the system towards the all-plus configuration by flipping spins at specified moments in time. In order to analyze this problem, we construct an auxiliary MDP by means of a reduction of the configuration space to the local minima of the Hamiltonian. Leveraging the convenient form of this auxiliary MDP, we uncover the structure of the optimal policy by solving the Bellman equations in a recursive manner. Finally, we conduct a numerical study on the performance of the optimal policy obtained from the auxiliary MDP in the original Ising STMDP.
arXiv.org
Controlling the low-temperature Ising model using spatiotemporal...
We introduce the spatiotemporal Markov decision process (STMDP), a special type of Markov decision process that models sequential decision-making problems which are not only characterized by...
Are you an international bachelor student considering doing your Physics MSc in Copenhagen?
The deadline for applying to the MSc programmes at Københavns Universitet - University of Copenhagen is January 15th if you are a non-EU student and March 1st if you are from the EU.
The Physics M.Sc. is fully in English, and we usually have about 50/50 Danish/international students. There are lots of opportunities for specializing, designing your own programme and for working closely with the reseachers!
The specializations are:
👉 Astrophysics
👉 Biophysics
👉 Computational Physics
👉 Earth and Climate Physics
👉 Physics of Complex Systems
👉 Quantum Physics
read more: https://lnkd.in/dyqjqGt3
The deadline for applying to the MSc programmes at Københavns Universitet - University of Copenhagen is January 15th if you are a non-EU student and March 1st if you are from the EU.
The Physics M.Sc. is fully in English, and we usually have about 50/50 Danish/international students. There are lots of opportunities for specializing, designing your own programme and for working closely with the reseachers!
The specializations are:
👉 Astrophysics
👉 Biophysics
👉 Computational Physics
👉 Earth and Climate Physics
👉 Physics of Complex Systems
👉 Quantum Physics
read more: https://lnkd.in/dyqjqGt3
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
#Postdoc position in Scaling Up Qualitative Interviews with Large Language Models at IT University of Copenhagen
https://candidate.hr-manager.net/ApplicationInit.aspx?cid=119&ProjectId=181760&MediaId=5
https://candidate.hr-manager.net/ApplicationInit.aspx?cid=119&ProjectId=181760&MediaId=5
Talentech
Postdoc position in Scaling Up Qualitative Interviews with Large Language Models at IT University of Copenhagen
The IT University of Copenhagen invites highly motivated candidates to apply for a postdoc position. The earliest possible starting date is 1 May 2025. The IT U
HIIT Research Fellow and #postdoc Fellow Positions in ICT
The Helsinki Institute for Information Technology (HIIT) invites applications for Postdoctoral Fellows and Research Fellows. HIIT offers a HIIT Postdoctoral Fellow position up to three years. For more senior candidates, HIIT offers a HIIT Research Fellow position up to five years. The length of the contract as well as the starting and ending dates are negotiable.
All excellent researchers in any area of ICT can be considered, but priority is given to candidates who support one (or more) of the HIIT strategic focus areas:
Artificial Intelligence
Computational Health
Cybersecurity
Data Science
Foundations of Computing
We do not limit our research to our focus areas. If you believe that your research lies outside of our focus areas, not listed in the supervisor group above, or if you are uncertain which focus area you belong, please select the “Other” option in our eRecruitment system. Our reviewers will look through your application to determine which area or supervisor suits your research interests best.
https://www.hiit.fi/hiit-postdoctoral-and-research-fellow-positions/
The Helsinki Institute for Information Technology (HIIT) invites applications for Postdoctoral Fellows and Research Fellows. HIIT offers a HIIT Postdoctoral Fellow position up to three years. For more senior candidates, HIIT offers a HIIT Research Fellow position up to five years. The length of the contract as well as the starting and ending dates are negotiable.
All excellent researchers in any area of ICT can be considered, but priority is given to candidates who support one (or more) of the HIIT strategic focus areas:
Artificial Intelligence
Computational Health
Cybersecurity
Data Science
Foundations of Computing
We do not limit our research to our focus areas. If you believe that your research lies outside of our focus areas, not listed in the supervisor group above, or if you are uncertain which focus area you belong, please select the “Other” option in our eRecruitment system. Our reviewers will look through your application to determine which area or supervisor suits your research interests best.
https://www.hiit.fi/hiit-postdoctoral-and-research-fellow-positions/
Helsinki Institute for Information Technology | HIIT
HIIT Postdoctoral and Research Fellow positions
Apply now
HIIT Research Fellow and Postdoctoral Fellow Positions in ICT
The Helsinki Institute for Information Technology (HIIT) invites applications for Postdoctoral Fellows and Research Fellows. HIIT offers a HIIT Postdoctoral Fellow position up to three…
HIIT Research Fellow and Postdoctoral Fellow Positions in ICT
The Helsinki Institute for Information Technology (HIIT) invites applications for Postdoctoral Fellows and Research Fellows. HIIT offers a HIIT Postdoctoral Fellow position up to three…
2501.05394v1.pdf
319.4 KB
The Ising model: Highlights and perspectives
Christof Kuelske
We give a short non-technical introduction to the Ising model, and review some successes as well as challenges which have emerged from its study in probability and mathematical physics. This includes the infinite-volume theory of phase transitions, and ideas like scaling, renormalization group, universality, SLE, and random symmetry breaking in disordered systems and networks. This note is based on a talk given on 15 August 2024, as part of the Ising lecture during the 11th Bernoulli-IMS world congress, Bochum.
Christof Kuelske
We give a short non-technical introduction to the Ising model, and review some successes as well as challenges which have emerged from its study in probability and mathematical physics. This includes the infinite-volume theory of phase transitions, and ideas like scaling, renormalization group, universality, SLE, and random symmetry breaking in disordered systems and networks. This note is based on a talk given on 15 August 2024, as part of the Ising lecture during the 11th Bernoulli-IMS world congress, Bochum.
The Inverse Problems You Carry in Your Pocket
In the spaces between data-hungry generative models and measurement-rich computational imaging, we can find the field
of computational photography. Can cell phone cameras be an accessible and affordable bridge between modern computer vision and traditional inverse imaging problems?
https://dl.acm.org/doi/pdf/10.1145/3703405
In the spaces between data-hungry generative models and measurement-rich computational imaging, we can find the field
of computational photography. Can cell phone cameras be an accessible and affordable bridge between modern computer vision and traditional inverse imaging problems?
https://dl.acm.org/doi/pdf/10.1145/3703405
301 | Tina Eliassi-Rad on Al, Networks, and Epistemic Instability
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture…
Tina Eliassi-Rad on Al, Networks, and Epistemic Instability
Big data is ruling, or at least deeply infiltrating, all of modern existence. Unprecedented capacity for collecting and analyzing large amounts of data have given us a new generation of artificial intelligence models, but also everything from medical procedures to recommendation systems that guide our purchases and romantic lives. I talk with computer scientist Tina Elassi-Rad about how we can sift through all this data, make sure it is deployed in ways that align with our values, and how to deal with the political and social dangers associated with systems that are not always guided by the truth.
https://www.preposterousuniverse.com/podcast/2025/01/13/301-tina-eliassi-rad-on-al-networks-and-epistemic-instability/
Big data is ruling, or at least deeply infiltrating, all of modern existence. Unprecedented capacity for collecting and analyzing large amounts of data have given us a new generation of artificial intelligence models, but also everything from medical procedures to recommendation systems that guide our purchases and romantic lives. I talk with computer scientist Tina Elassi-Rad about how we can sift through all this data, make sure it is deployed in ways that align with our values, and how to deal with the political and social dangers associated with systems that are not always guided by the truth.
https://www.preposterousuniverse.com/podcast/2025/01/13/301-tina-eliassi-rad-on-al-networks-and-epistemic-instability/
📢 Interested in Temporal Networks?
Join TENET, a satellite at hashtag#NetSci2025 dedicated to discussing temporal networks, methods, and applications. Hear from leading experts (Márton Karsai, Naoki Masuda, Farimah Poursafaei, Petter Holme) share their latest research and insights, all while enjoying the picturesque city of Maastricht!
🔎 Submit a one-page abstract for a chance to showcase your work and compete for the Best Contribution Award 🏅.
🗓️ Important dates:
Submission deadline: February 7, 2025
TENET Satellite: June 2-3, 2025
https://sites.google.com/view/tenet-netsci/home
Join TENET, a satellite at hashtag#NetSci2025 dedicated to discussing temporal networks, methods, and applications. Hear from leading experts (Márton Karsai, Naoki Masuda, Farimah Poursafaei, Petter Holme) share their latest research and insights, all while enjoying the picturesque city of Maastricht!
🔎 Submit a one-page abstract for a chance to showcase your work and compete for the Best Contribution Award 🏅.
🗓️ Important dates:
Submission deadline: February 7, 2025
TENET Satellite: June 2-3, 2025
https://sites.google.com/view/tenet-netsci/home
A semi-regular reminder: Together with colleagues from South Korea and Japan, we are running an interdisciplinary online seminar series called Complex Systems Research Exchange (CREx🦖).
sites.google.com/view/cxrex
sites.google.com/view/cxrex
Google
CREx
Complex Systems Research Exchange (CREx) is an online seminar series aimed at building an international research community in the interdisciplinary field of complex systems, very broadly defined. Our focus is on creating opportunities to hear from early to…