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arxiv: 2605.15798 · v1 · pith:CJ5O3NMRnew · submitted 2026-05-15 · ⚛️ physics.soc-ph · cond-mat.dis-nn

Event-based spatiotemporal networks for modelling emergent phenomena in complex systems

Pith reviewed 2026-05-19 19:51 UTC · model grok-4.3

classification ⚛️ physics.soc-ph cond-mat.dis-nn
keywords spatiotemporal networksevent-based modelingcomplex systemsemergent phenomenadisease transmissiontransportation systemsnetwork framework
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The pith

Event-based spatiotemporal networks generate emergent behaviors in complex systems by encoding processes as discrete space-time events.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This paper develops event-based spatiotemporal networks as a way to model how fine-grained processes in complex systems produce large-scale patterns. The framework represents system activities as discrete events that are located in both space and time. A sympathetic reader would care because it offers a practical way to connect detailed local data to overall dynamics in areas like epidemiology and transportation without needing to average or simplify too early. The method is illustrated with real examples of tracking a pathogen outbreak and delay spread in trains. It suggests this event focus can help in other fields where emergence matters.

Core claim

Event-based spatiotemporal networks encode system processes as discrete events anchored in space and time. They provide a unified, flexible and efficient approach to generate emergent behaviour in complex systems across space and time from these events. This is demonstrated through applications to tracking transmission routes during a local outbreak of a novel respiratory pathogen in the Netherlands and modeling the propagation of delays in the S-bahn public transportation system around Zürich, Switzerland.

What carries the argument

Event-based spatiotemporal networks that encode system processes as discrete events anchored in space and time.

If this is right

  • Enable fine-grained tracking of transmission routes and infection patterns through space and time in disease outbreaks.
  • Model propagation of delays in public transportation systems.
  • Improve data analysis, simulation, and collection strategies in developmental biology and community ecology by focusing on events rather than static states.
  • Handle large, high-resolution datasets to derive macroscopic dynamics from micro-level data in complex systems.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Researchers in other domains could define custom event types to apply the same structure to phenomena like urban traffic or species interactions.
  • Data collection efforts might shift toward logging discrete occurrences with precise locations and timings instead of continuous measurements.
  • Comparing results from this event-based method to traditional continuous models could reveal when discretization preserves or alters key emergent features.

Load-bearing premise

Real-world system processes can be adequately represented as discrete events anchored in space and time without critical loss of information or introduction of artifacts that distort emergent dynamics.

What would settle it

Running the networks on the Netherlands pathogen outbreak data and finding that predicted infection patterns do not match the actual observed spread would indicate the representation loses critical information.

Figures

Figures reproduced from arXiv: 2605.15798 by Carl D. Modes, Debabrata Panja, Francesco Corman, Matthijs Romeijnders, Michiel van Boven, Phillip Staniczencko.

Figure 1
Figure 1. Figure 1: From real-world data to network representations. [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Comparison between EBSTN and the current best, TN, for the infectious disease epidemiology example. [PITH_FULL_IMAGE:figures/full_fig_p004_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Simulations of the early stages of an outbreak of a novel pathogen that is introduced in working adults in selected Dutch municipalities. The model includes ∼ 170,000 actors, who are categorised into 11 demographic groups and assigned to 355 municipalities of residence. Actors’ movements are tracked on an hourly resolution, obeying day-night and weekday-weekend mobility rhythms, and they mixed within munic… view at source ↗
Figure 4
Figure 4. Figure 4: Modelling of public transport system, specifically railway operations. [PITH_FULL_IMAGE:figures/full_fig_p007_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: Space-time diagram showing delay propagation on infrastructure (to avoid cluttering the figure, event start and end times are marked only for blocking section B1). (a) The schedule for two different services – preceding (gray) and following (blue) – travelling through three sequential blocking sections of different lengths B1 → B2 → B3 on an infrastructure link. The event that the preceding (resp. followin… view at source ↗
read the original abstract

Complex systems display emergent phenomena that vary significantly across spatial and temporal scales. These variations originate from fine-grained system processes, yet arriving at macroscopic dynamics from micro-level data -- particularly when large, high-resolution datasets are available -- remains a persistent challenge. Here we develop event-based spatiotemporal networks, a computational modelling framework that encodes system processes as discrete events anchored in space and time. Event-based spatiotemporal networks offer a unified, flexible and efficient approach to generate emergent behaviour in complex systems across space and time from these events. We demonstrate the effectiveness of event-based spatiotemporal networks through two illustrative real-world applications. First, following a local outbreak of a novel respiratory pathogen in the Netherlands, spatiotemporal networks enable fine-grained tracking of transmission routes and infection patterns through space and time. Second, we use spatiotemporal networks to model propagation of delays in a public transportation system (S-bahn) around Z\"urich, Switzerland. We also discuss broader uses of event-based spatiotemporal networks in fields like developmental biology and community ecology, where focusing on events rather than static system states can improve data analysis, simulation, and collection strategies.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 1 minor

Summary. The manuscript introduces event-based spatiotemporal networks as a modeling framework that represents complex system processes as discrete events anchored in space and time, aiming to generate emergent macroscopic behaviors from micro-level data. It demonstrates the approach through two real-world applications: fine-grained tracking of a novel respiratory pathogen transmission in the Netherlands and modeling delay propagation in the Zurich S-bahn public transportation system. Broader potential uses are discussed in fields such as developmental biology and community ecology.

Significance. If the framework receives a rigorous mathematical formulation and empirical validation, it could provide a flexible, unified method for bridging high-resolution event data to emergent dynamics across spatial and temporal scales in complex systems. This has potential value for simulation, analysis, and data collection strategies in physics of social systems and related disciplines, particularly where static state-based models fall short.

major comments (2)
  1. [Framework description] Framework section: The central claim that event-based spatiotemporal networks constitute a 'unified, flexible and efficient approach' to generate emergent behaviour lacks any equations, formal definitions, or algorithmic specifications for event encoding, network construction, or emergence generation. This is load-bearing for the manuscript's contribution, as the abstract and description provide no basis to evaluate reproducibility or advantages over existing spatiotemporal models.
  2. [Applications] Applications section: The two illustrative demonstrations (pathogen outbreak tracking and delay propagation) are presented without quantitative metrics, error analysis, baseline comparisons, or falsifiable predictions. This undermines the assertion of 'effectiveness' and leaves the support for the framework's practical utility unassessable.
minor comments (1)
  1. [Abstract] Abstract: The LaTeX-style notation 'Zürich' should be rendered consistently in the final typeset version.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their constructive and detailed comments, which have identified key opportunities to strengthen the formal presentation and empirical grounding of our work. We address each major comment point by point below, indicating the revisions we will undertake.

read point-by-point responses
  1. Referee: Framework section: The central claim that event-based spatiotemporal networks constitute a 'unified, flexible and efficient approach' to generate emergent behaviour lacks any equations, formal definitions, or algorithmic specifications for event encoding, network construction, or emergence generation. This is load-bearing for the manuscript's contribution, as the abstract and description provide no basis to evaluate reproducibility or advantages over existing spatiotemporal models.

    Authors: We agree that the current version would be strengthened by explicit mathematical formalization. In the revised manuscript we will insert a new subsection in the Framework section that defines events as structured tuples (location, timestamp, event type, attributes), specifies the network construction procedure (spatiotemporal proximity rules for edge formation with explicit distance and time thresholds), and details the emergence generation mechanism (iterative propagation and aggregation operators that map micro-events to macro observables). We will also provide pseudocode and a brief comparison to related approaches such as event-driven simulation and spatiotemporal graph neural networks to clarify advantages in flexibility and efficiency for high-resolution data. revision: yes

  2. Referee: Applications section: The two illustrative demonstrations (pathogen outbreak tracking and delay propagation) are presented without quantitative metrics, error analysis, baseline comparisons, or falsifiable predictions. This undermines the assertion of 'effectiveness' and leaves the support for the framework's practical utility unassessable.

    Authors: The applications were conceived as illustrative demonstrations of the framework's workflow rather than exhaustive validation studies. We nevertheless accept that quantitative support is necessary to substantiate claims of effectiveness. In revision we will add, for the pathogen case, metrics such as route reconstruction precision against contact-tracing ground truth and comparison to a standard compartmental model; for the S-bahn case, we will report delay prediction RMSE and compare against a baseline queueing model. We will also state explicit falsifiable predictions (e.g., expected infection wavefront speed under different event densities) and note any data limitations that constrain full statistical testing. revision: yes

Circularity Check

0 steps flagged

No significant circularity detected in derivation chain

full rationale

The paper introduces event-based spatiotemporal networks as a conceptual computational modeling framework for generating emergent behavior from discrete events in space and time. No mathematical equations, derivations, fitted parameters, or self-citations are presented in the abstract or described content that would reduce any claimed prediction or result to its own inputs by construction. The two applications are framed explicitly as illustrative demonstrations rather than quantitative validations or forced outcomes. The central claim rests on the adequacy of event discretization for complex systems, which is an independent modeling choice without internal reduction to prior results or definitions within the provided text. This qualifies as a self-contained conceptual contribution with no load-bearing circular steps.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review provides no equations, methods section, or explicit assumptions; therefore no free parameters, axioms, or invented entities can be identified from the given text.

pith-pipeline@v0.9.0 · 5744 in / 1074 out tokens · 25170 ms · 2026-05-19T19:51:46.707966+00:00 · methodology

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    M. Romeijnders, Event-based spatiotemporal networks for modelling emergent phenomena in complex systems, ebstn-episim, DOI:10.5281/zenodo.20178775 (2026). Acknowledgements We thank Jan Lordieck for providing the schematic figure 4(b), and many helpful discussions on delay propagation in public transport. Author contributions DP conceived the idea for EBST...