DISA

Centre for Data Intensive Sciences and Applications

Welcome to the April PhD-seminar in 2023

2023-03-09

  • When? April 14th 14.00 – 16.00
  • Where? D1172 – Växjö (link will provided for those who wants to attend online)
  • Registration: We would like to know how many that will attend onsite/online in order to get some fika for those onsite. So please register by April 12th https://forms.gle/JzVPp5h9Uz1Cwaqx6

Agenda
14.00-14.10 Welcome and practical information from Welf Löwe
14.10-14.55 Presentation and discussion: Advanced identification methods for the forest industry through CV/AI – Dag Björnberg, Industry PhD-student Softwerk
14.55 – 15.05 Coffee break
15.05 – 15.50 Presentation and discussion – Sound, Precise, Memory Efficient Points-to Analysis – Mathias Hedenborg
15.50 -16.00 Sum up and plan for our next seminar on May 5th

Abstracts

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First publication from our Industry PhD-students at Volvo CE is published!

2023-03-08

Volvo CE is a major player in the construction business and leads the development of machines and technologies for sustainability, autonomy, and connectivity. An enabler for this technology transformation is smart usage and integration of machine operation data and computer simulations. To increase the knowledge in Volvo CE, a cooperation with the Linnaeus University started and Manoranjan Kumar and Joel Cramsky became two of the first industry PhD-students in DIA.

Something that most developers in industry do not do in their daily work is to share their knowledge in publications, but it’s an important part during the PhD-studies. One part of these studies has led to a paper within Data Science, “A prediction model for exhaust gas regeneration(EGR) clogging using offline and online machine learning” and it was recently published as a part of the Conference Proceedings of the 7th International Commercial Vehicle Technology Symposium.

For more information about the publication see: https://link.springer.com/chapter/10.1007/978-3-658-40783-4_13 

Welcome to the March PhD-seminar 2023

2023-02-08

When? Friday March 10th 14.00-15.00
Where? Via zoom
Registration? No registration needed since the seminar is only online this time, if you have not received the link please contact Diana Unander diana.unander@lnu.se

This time we will only have one presentation and the seminar will be fully online since the presenter is located abroad.

Agenda:
14.00 – 14.10 Welcome and practical information from Welf Löwe
14.10 – 14.55 Presentation and discussion: Using multiple embeddings for visual analytics – Daniel Witschard  (ISOVIS)
14.55 – 15.00 Wrap up – information about the next PhD-seminar

Abstract

Using multiple embeddings for visual analytics – Daniel Witschard  (ISOVIS)

Embeddings are numeric vector representations of complex or unstructured data. The main goal of embedding algorithms is usually to produce embeddings where items that are similar in the original data set are embedded into vectors that lie close to each other in the embedding space. This makes embeddings highly suitable as input for computational analysis tasks such as clustering, classification, and similarity calculations since it is often more straightforward to perform these calculations on numeric vectors than rather than on the underlying data. For some data types, such as graphs/networks and words/text, there exist several different algorithms (each with its specific characteristics and tradeoffs) and therefore choosing the best embedding technology for a given application is an important and often non-trivial task. However, searching for single candidates is not the only strategy that could be used–and therefore this presentation will contain examples and results (some published, and some work-in-progress) aiming to answer the research question “Is it possible to combine several different embeddings to obtain even better results and visualizations?”

More information about Daniels research project https://lnu.se/en/research/research-projects/doctoral-project-multivariate-network-embedding-for-visual-analytics/ 

 

Invitation to Baladria Summer School in Digital Humanities: online and in Zadar, 12 Jun — 05 Jul

2023-02-06

It is a pleasure to invite you to the third Baladria Summer School in Digital Humanities, this year awarding credits and taking place both online and in Zadar. The schedule is as follows:

  • First week, 12-18 June – online, asynchronously (obligatory online participation)
  • Second week, 19-23 June – Zadar, Croatia (obligatory in-person participation)
  • Last weeks, 24 June to 05 Juley — online, asynchronously (obligatory online participation)

Application opens: 17 February 2023

Application closes: 15 March 2023

For more information and to apply, please visit the course website at https://lnu.se/en/course/methods-for-digital-humanities-baladria-summer-school-in-digital-humanities/vaxjo-distance-international-summer/.

Welcome!

Webinarium om hälsodata och EU-projektet Health Data Sweden

2023-02-02

  • När? 27 feb 2023 kl 12-13
  • Var? Online

Forskargruppen eHälsa och hälsodata i samverkan vid Uppsala universitet bjuder in till webinarium om hälsodata. På progammet finns bland annat:

– Vad innebär egentligen hälsodata och varför är det viktigt?
– Introduktion av EU-projektet Health Data Sweden (HDS)
– Sebastiaan Meijer (KTH) koordinator för HDS
– Maria Hägglund (UU) ansvarig för Uppsalas aktiviteter i HDS
– Stort utrymme för frågor och diskussion

Anmäl dig här  så kommer mer information ungefär en vecka innan webinariet.
Vi ses!

För frågor kontakta: Maria Hägglund (maria.hagglund@kbh.uu.se) eller Sara Riggare (sara.riggare@kbh.uu.se), Forskargruppen eHälsa och hälsodata i samverkan

 

Welcome to the February PhD-seminar 2023

2023-01-18

When? Friday February 3rd 14.00-16.00
Where? D1172 or via zoom, the link will be sent out to those who register
Registration? Register via this link https://forms.gle/t1D3iHkC6mocidQF6 no later than February 1st.

Agenda:
14.00 – 14.10 Welcome and practical information from Welf Löwe
14.10 – 14.55 Presentation and discussion: Digital twin development at Volvo CE (VCE) for Wheel loaders (WLO) –Manoranjan Kumar, Volvo
14.55 – 15.05 Coffee break
15.05 – 15.50 Presentation and discussion – Design and Analysis of Self-Protection: Adaptive Security for Software-Intensive Systems – Charilos Skandylas; LNU
15.50 – 16.00 Sum up and plan for our next seminar on March 3rd

Abstracts

Digital twin development at Volvo CE (VCE) for Wheel loaders (WLO) –Manoranjan Kumar, Volvo CE
In recent years, numerous advancements have been made in technology related to IOT, data visualization, and simulation. Therefore, VCE has decided to develop the digital twin model of Wheel loaders to support and understand the customers need. This decision comes with opportunities and challenges. The success of digital twin depends on a minimum of data being extracted from real machines allowing still estimates of complete vehicle usages using the simulations. Those simulations can be data driven or physics based. VCE’s Digital twin platform supports the developments of hardware as well as software for Digital twins (DT) including:

  • WLO usage DT: Logs of WLO capture the behaviors of drivers and what kind of materials they are handling and classifies the driving styles using machine learning.
  • WLO DT: Complete vehicle simulations of WLOs using the physical properties of different components. The simulation also captures the different controls and path followings. The simulation is “twinned” with the loads measured in real machines. Good correlations are observed for different kinds of driving behaviors.
  • EGR DT: Exhaust gar recirculation (EGR) clogging can be monitored in different types of construction machines using online and offline machine learning approaches.

More information about the research project: https://lnu.se/en/research/research-projects/doctoral-project-digital-twin-developments-within-volvo-ce/

Design and Analysis of Self-Protection: Adaptive Security for Software-Intensive Systems – Charilos Skandylas, LNU
Today’s software landscape features a high degree of complexity, frequent changes in requirements and stakeholder goals, and uncertainty. Therefore, in the corresponding threat landscape cybersecurity attacks are a common occurrence, and their consequences are often severe. Self-adaptive systems have been proposed to mitigate the complexity and frequent degree of change by adapting at run-time to deal with situations not known at design time. They, however, are not immune to attacks, as they themselves suffer from high degrees of complexity and uncertainty. Therefore, suitable software systems that can dynamically defend themselves from adversaries are required. Such systems are called self-protecting systems and aim to identify, analyze and mitigate threats autonomously.

This presentation will discuss approaches with the goal of providing software systems with self-protection capabilities in two parts. The first part aims to enhance the security of architecture-based self-adaptive systems and equip them with self-protection capabilities. Both proactive and reactive self-protection techniques will be discussed. Proactive techniques aim to protect a software system by accurately analyzing its current and future security relevant behaviour and steering the system towards the most secure behavior, minimizing the attack surface. Reactive techniques provide self-protection to an architecture based self-adaptive system via effective countermeasure selection at runtime. In the second part, we extend a classical decentralized information flow control model by incorporating trust and adding adaptation capabilities that allow a full decentralized, open system system to identify security threats and self-organize to maximize the average trust between the system entities while maintaining the security policies of each of the system’s entities.

Welcome to our first PhD-seminar in 2023

2022-12-19

When? January 13th, 14-16
Where? D1140 – Växjö (link will provided for those who wants to attend online)
Registration: We would like to know how many that will attend onsite/online in order to get some fika for those onsite. So please register by January 11th https://forms.gle/mxHmRtdEydUWGoa79

Agenda
14.00-14.10 Welcome and practical information from Welf Löwe
14.10-14.55 Presentation and discussion: Exploiting Automatic Change Detection in Software Process Evolution for Organizational Learning – Sebastian Hönel
14.55 – 15.05 Coffee break
15.05 – 15.50 Presentation and discussion – Design and implementation of factory-integrated machine learning models and case studies of ongoing data-driven projects – Felix Viberg
15.50 -16.00 Sum up and plan for our next seminar on February 13th

Abstracts

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Invitation: Research Seminar 9/12 11-12

2022-11-15

Title: “Roadmaps for AI Integration in the Rail Sector: Current Project Results and Overview of Case-Studies”

Abstract: Artificial Intelligence (AI) is increasingly affirming as a game-changer technology in several sectors, including rail transport. The overall objective of the H2020 Shift2Rail project RAILS (Roadmaps for AI Integration in the raiL Sector) is to investigate the potential of AI in the rail sector and to contribute to the definition of roadmaps for future research in the context of railway maintenance and inspection, autonomous train driving, and traffic planning and management. This seminar will provide a high-level overview of the RAILS project, presenting the main topics, objectives, ongoing research activities, and preliminary results achieved. Particular attention will be given to the current investigations towards the application of Deep Learning approaches to improve the maintainability of railway assets and the safety of autonomous trains. To be specific, two main case studies will be discussed, and recent advancements presented, concerning smart maintenance at level crossings and vision-based obstacle detection on rail tracks.

Speaker: Lorenzo De Donato (Visiting PhD at LNU) he is a Ph.D. Student in Information Technology and Electrical Engineering. When Lorenzo is not in Sweden visiting us he can be found at the Department of Electrical Engineering and Information Technology, University of Naples Federico II, Naples, Italy

Contact information: lorenzo.dedonato@unina.it

 

Welcome to our first PhD-seminar November 4th

2022-10-15

  • When? November 4th 14-16
  • Where? D1140 – Växjö (link will provided for those who wants to attend online)
  • Registration: We would like to know how many that will attend onsite/online in order to get some fika for those onsite. So please register by November 2nd https://forms.gle/ZwwgoQ4JK4e41BBR6

 Agenda

14.00-14.10     Welcome and practical information from Welf Löwe

14.10-14.55     Presentation and discussion: Visual Analytics for Explainable Machine Learning in a Nutshell – Angelos Chatzimparmpas

14.55 – 15.05  Coffee break

15.05 – 15.50  Presentation and discussion: Getting the most out of health data, combing the best of two worlds – Olle Björneld

15.50 -16.00    Sum up and plan for our next seminar on January 13th

Abstracts

Visual Analytics for Explainable Machine Learning in a Nutshell – Angelos Chatzimparmpas

Machine learning (ML) research has recently gained much attention, with various models proposed to understand and predict patterns and trends in data originating from various domains. Unfortunately, users find it harder to evaluate and trust the results of these models as they become more complex because most of their internal workings are kept in secret black boxes.

One possible solution to this problem is the explanation of ML models with visual analytics (VA) since it enables human experts to analyze large and complex information spaces such as data and model spaces. By doing so, evidence has shown an improvement in predictions and an increase in the reliability of the results.

This talk aims to provide an overview of the state-of-the-art in explainable and trustworthy ML with the use of visualizations, as well as the development of VA systems for each stage of a typical ML pipeline. Furthermore, we will briefly introduce some of these tools and discuss how such VA techniques can help us not only understand ML models but also do this in a human-centered and steerable way.

Getting the most out of health data, combing the best of two worlds – Olle Björneld

Machine learning driven knowledge discovery on real world data based on domain knowledge. Real world data does not comply with machine learning models very well and prediction models perform suboptimal if pre-processing of data is deficient.

Based on experience from medical registry studies using electronic health data (EHR) performed in collaboration with domain experts, data analyst and statistician an automatic feature engineering framework and method have been developed. The framework is called automatic Knowledge Driven Feature Engineering (aKDFE) and have been evaluated by machine learning pipeline.

Experiment shows that prediction models performs better if aKDFE is used without losing explainability, but more experiments need to be performed in other domains to fully quantify the results. The key aspect is how to concentrate and mine inherent knowledge in transaction data to optimal machine learning driven prediction models.

A warm welcome,

Welf & Diana

New PhD-seminar series in Computer Science

2022-10-01

In Computer Science at Linnaeus University we have different types of PhD-students. Our regular PhD-students, DISA-PhD-students and DIA-PhD-students and will hopefully be approved of getting a second intake for DIA starting next semester. Our PhD-students do not regularly meet these days and we want to change this. This will be an opportunity for PhD-students, supervisors from the university and industry to meet and discuss and provide a structured knowledge exchange.

We are working to increase the quality and formal processes for all of our PhD-students and as a first step we will introduce monthly PhD-seminars starting beginning of November 2022.

We will meet first Friday of each month between 14-16 preferably onsite but if it’s not possible we will provide the possibility to connect online too. During each seminar 2 PhD-students will get the chance to present their research and status for 30 min followed by a Q& A for 20-25 min with a coffee break in between.

Keep your eyes open for more information

/Diana