Categories
Complexity Emergence SCIENCE Social network

Emergence and macro-level independency

Recently Philip Ball collaborator of Quanta Magazine in an article  entitled The New Math of How Large-Scale Order Emerges“, discussed some research advances around the question of how emergence emerge in complex systems? He focuses on the work of Fernando Rosas and six other researchers entitled “Software in the natural world: A computational approach to emergence in complex multi-level systems”, which presents  a mathematical framework based on computational mechanics to better understand the phenomenon of emergence.

According to the researchers, by organizing systems such as economic, urban or even biological systems into hierarchies of levels, it is possible to find in each of them properties that allow each level to operate independently of the others, just as software does in a computer, each software works independently the computation mechanism of the hardware circuits. This means that emergent phenomena are governed by macroscale rules that appear to be self-contained, regardless of what the components or entities of other hierarchies do.

In general, the approach of Rosas et al. (2024) characterizes the interdependence between micro and macro levels by combining principles of computational mechanics with fluid dynamics and dynamical systems theory, which are widely used in continuous systems. This contribution to bridging the gap between emergence and complex systems is guided by previous research by Barnett & Seth (2023), which proposes a system in which a dynamically macro level is conditional on its own history and independent of the history of the micros process. Both studies turn around systems whose macro levels have a degree of causal ‘self-containment’ with respect to their micro processes, which could be understood as a kind of emergence.

To access the Quanta Magazine article, use this link:

https://www.quantamagazine.org/the-new-math-of-how-large-scale-order-emerges-20240610

For the Rosas et al. (2024) paper:

https://arxiv.org/abs/2402.09090v2

And for the paper by Barnett & Seth (2023):

https://arxiv.org/pdf/2106.06511

Made in Adobe Firefly AI, prompt: Jorge Salgado.

References:

Barnett, L.  and Seth A. K. 2023. “Dynamical independence: discovering emergent macroscopic processes in complex dynamical systems,” Physical Review E, vol. 108, no. 1, p. 014304.

Rosas, F. E., Geiger, B. C., Luppi, A. I., Seth, A. K., Polani, D., Gastpar, M., & Mediano, P. A. M. (2024). Software in the natural world: A computational approach to hierarchical emergence. arXiv.

Categories
Complexity Digital twins Simulation Urban

The Rise of Digital Twins

Last March, Nature Computational Science published an issue dedicated to digital twins. From the simulators used by NASA in the Apollo missions to today’s applications in urban planning, the concept of digital twins is more alive than ever. 

Since that first application, digital twins have been nurtured by significant advances in computing power, data generation and the emergence of a wide range of methods and tools for building the ‘living models’. These developments have extended the possibilities of digital twins from industry and engineering to other fields such as social sciences, biomedicine, climate science and others, which bring their own challenges, requirements and discussions.

This issue of Nature Computational Science highlights the most recent developments in this flourishing field, bringing together expert point of views on the needs, gaps and opportunities for implementing digital twins in different subjects. In the context of urban planning, Michael Batty presents an article that begins with a discussion of the definition of digital twins and argues that the gap between real and digital is not the same for physical assets than for social and organizational systems. Batty claim, as well as the need to integrate humans in the loop design and use of digital twins, reminding as cities could be inherently unpredictable.

If you are interested in this issue, follow this link:

https://www.nature.com/collections/feicjiideh

Follow this link to read Michael Batty article:

https://www.nature.com/articles/s43588-024-00606-7

Source: Busakorn Pongparnit / Moment / Getty Images

Categories
Cities Programming SCIENCE Simulation Urban Vizualization

A model-based spatio-temporal classification of global urban expansion  – ECTQG 2023

Dr Jingyan Yu, – postdoctoral researcher and member of Citadyne – presented the first results of her research “A model-based spatio-temporal classification of global urban” at the European Colloquium of Theoretical and Quantitative Geography 2023 (ECTQG, 2023).  She has developed static and dynamic measures to simulate urban expansion in Functional Urban Areas (FUA) around the world. She has found a global trend of physical spatial dispersion, producing discontinuous, dispersed built-up areas.

If you are interested in this research you can contact Dr Yu:

jingyan.yu@unil.ch