DISA

Centre for Data Intensive Sciences and Applications

Welcome to our Higher Research Seminar in April

2026-03-27

When? April 24, 14.00-15.00
Where? Onsite: D2272 and via zoom
Registration: Please sign up for the seminar via this link https://forms.gle/9RnPVPc51CkQMgRc7 by April 22. This is especially important if you plan to attend onsite so we can make sure there is fika for everyone.

Agenda
14.00-14.10 Welcome and practical information
14.10-14.55 Latent-Variable Learning of SPDEs via Wiener Chaos – Sebastian Zeng  
14.55 – 15.00 Sum up and plan for our upcoming seminars


Abstract

Latent-Variable Learning of SPDEs via Wiener Chaos – Sebastian Zeng  
We study the problem of learning the law of linear stochastic partial differential equations (SPDEs) with additive Gaussian forcing from spatiotemporal observations. Most existing deep learning approaches either assume access to the driving noise or initial condition, or rely on deterministic surrogate models that fail to capture intrinsic stochasticity. We propose a structured latent-variable formulation that requires only observations of solution realizations and learns the underlying randomly forced dynamics.

Our approach combines a spectral Galerkin projection with a truncated Wiener chaos expansion, yielding a principled separation between deterministic evolution and stochastic forcing. This reduces the infinite-dimensional SPDE to a finite system of parametrized ordinary differential equations governing latent temporal dynamics. The latent dynamics and stochastic forcing are jointly inferred through variational learning, allowing recovery of stochastic structure without explicit observation or simulation of noise during training. Empirical evaluation on synthetic data demonstrates state-of-the-art performance under comparable modeling assumptions across bounded and unbounded one-dimensional spatial domains. 

Welcome to our PhD-seminar in April

When? April 10, 14.00-16.00
Where? Onsite: D2272 and via zoom
Registration: Please sign up for the seminar via this link https://forms.gle/gnEjrVfnZRtJgjKYA  by April 8. This is especially important if you plan to attend onsite so we can make sure there is fika for everyone.

Agenda
14.00-14.10 Welcome and practical information
14.10-14.55 Architecting Carbon-Aware Software-as-a-Service – Samuele Giussani
14.55 – 15.05 Coffee break
15.05 – 15.50 Digital product passports: A value perspective – Timmy Öberg
15.50 -16.00 Sum up and plan for our upcoming seminars

Abstracts

Architecting Carbon-Aware Software-as-a-Service – Samuele Giussani
Software-as-a-Service (SaaS) solutions are increasingly adopted due to their scalability, cost-effectiveness, and ability to support rapid deployment while ensuring high availability and flexibility. However, carbon emissions are still rarely treated as a first-class design concern. Existing approaches predominantly focus on post-deployment measurement and mitigation, overlooking the fact that architectural decisions determine a significant share of a system’s environmental impact. This is particularly evident in multi-region and multi-tenant settings, where carbon intensity varies across locations and over time, and tenants contribute unevenly to overall resource consumption. Supporting architects in evaluating these factors early in the design process requires systematic reasoning mechanisms that can combine heterogeneous architectural, infrastructural, and operational information into actionable insights.

In this talk, the conceptual foundations of a Carbon-Aware Reasoning Framework are presented, enabling the design-time evaluation of multi-tenant SaaS architectures with respect to both carbon impact and performance-related quality attributes. A model-driven, tool-supported implementation of the Framework is then introduced, illustrating how carbon-aware reasoning can complement traditional architectural evaluation practices and inform environmentally conscious deployment decisions.

Digital product passports: A value perspective – Timmy Öberg
This presentation provides insights into an ongoing systematic mapping review of digital product passports (DPPs) from a value and ecosystem perspective. Based on existing and emerging classification schemes, the presentation maps the DPP research landscape and discusses current trends. The study explores where current DPP research is focused, including publication venues, research methods, contribution types, and industry sectors. It further analyzes the value dimensions the literature address, including value outcomes, value creation capabilities, and the value chain actors considered.

Welcome to our Higher Research Seminar in March

2026-03-02

When? March 20, 14.00-16.00
Where? Onsite:D2272 and via zoom
Registration: Please sign up for the seminar via this link https://forms.gle/qicTg53xmxQJtkBa7 by March 18. This is especially important if you plan to attend onsite so we can make sure there is fika for everyone.

Agenda
14.00-14.10 Welcome and practical information
14.10-14.55 Transparent Adverse Drug Event Detection in Swedish Clinical Text: Challenges in Building Information Extraction Pipelines for a Low-Resource Language – Elizaveta Kopacheva 
14.55 – 15.05 Coffee break
15.05 – 15.50 TWIN4DEM: Strengthening democratic resilience through digital twins – Giangiacomo Bravo 
15.50 -16.00 Sum up and plan for our upcoming seminars


Abstracts

Transparent Adverse Drug Event Detection in Swedish Clinical Text: Challenges in Building Information Extraction Pipelines for a Low-Resource Language – Elizaveta Kopacheva  
Automatic detection of adverse drug events (ADEs) in clinical texts is an important task for pharmacovigilance and patient safety. For clinical decision support, transparency is essential: a useful system should not only classify whether a document mentions an ADE but also highlight the supporting evidence in the text. Achieving this typically requires a pipeline combining named entity recognition (NER), relation extraction (RE), and document classification. However, most prior work studies these components in isolation and primarily focuses on high-resource languages such as English and Chinese. 

This presentation discusses the challenges of developing an end-to-end ADE detection pipeline for Swedish clinical text, a low-resource language. I will discuss how errors propagate through the NER–RE pipeline and affect overall performance. Particular attention is given to the complexity of Swedish clinical NER, including discontinuous entities, partial-word spans, and tokenization mismatches—especially when models rely on English-based tokenizers. I will present a comparison of multilingual and Swedish-specific pretrained models (including a clinically tuned model), as well as encoder-only and encoder–decoder architectures, and discuss their usability for transparent ADE detection in free text. I will also highlight remaining challenges in evaluation. The talk aims to provide practical insights into why building reliable and interpretable ADE detection systems for Swedish clinical text remains difficult and what considerations are important for future work. 

 
TWIN4DEM: Strengthening democratic resilience through digital twins – Giangiacomo Bravo 
Democracy research struggles to explain why democracies backslide and predict which countries are more vulnerable to erosion of the rule of law. TWIN4DEM, a Horizon Europe project, aims to address this issue by creating a digital twin (DT) of political systems. 

DTs are data-intensive simulation models designed as virtual copies of real-world systems. TWIN4DEM focuses on detecting vulnerabilities in democratic systems due to executive aggrandizement and advising policymakers on preventive measures. The current version of the DT is conceptual and focuses on the decision-making process of agents. It is based on synthetic data and represents a “generic” model to be used ad base to implement country-specific ones. The model includes three core groups of agents: (a) members of government that initiate executive aggrandizement; (b) members of parliament; and (c) members of constitutional or administrative courts. Such agents interact with two main types of influencers who shape their behavior: citizens (including context-specific interest groups) and EU institutions. 

The final goal of the project goal is to implement four specific country cases — Czech Republic, France, Hungary, and The Netherlands — reflecting the specificity of the different political systems and informed by local data. The first of these cases (Hungary) is planned to be developed during the spring and some preliminary results will be shared during the seminar.