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Ornate medieval ring discovered in Norway's oldest town

Popular Science

Ornate medieval ring discovered in Norway's oldest town Scientists are still investigating if the ring's center stone is a sapphire or colored glass. Breakthroughs, discoveries, and DIY tips sent every weekday. Last summer, Linda Åsheim found a ring so beautiful it looks like it could have been made yesterday. But Åsheim is an archaeologist, and she found the rare artifact while excavating in a Norwegian town believed to be the oldest in the country. The gorgeous golden ring is decorated with a gemstone and filigree décor--and is over 800 years old.


Generalisation of automatic tumour segmentation in histopathological whole-slide images across multiple cancer types

Skrede, Ole-Johan, Pradhan, Manohar, Isaksen, Maria Xepapadakis, Hveem, Tarjei Sveinsgjerd, Vlatkovic, Ljiljana, Nesbakken, Arild, Lindemann, Kristina, Kristensen, Gunnar B, Kasius, Jenneke, Zeimet, Alain G, Brustugun, Odd Terje, Busund, Lill-Tove Rasmussen, Richardsen, Elin H, Haug, Erik Skaaheim, Brennhovd, Bjørn, Rewcastle, Emma, Lillesand, Melinda, Kvikstad, Vebjørn, Janssen, Emiel, Kerr, David J, Liestøl, Knut, Albregtsen, Fritz, Kleppe, Andreas

arXiv.org Artificial Intelligence

Deep learning is expected to aid pathologists by automating tasks such as tumour segmentation. We aimed to develop one universal tumour segmentation model for histopathological images and examine its performance in different cancer types. The model was developed using over 20 000 whole-slide images from over 4 000 patients with colorectal, endometrial, lung, or prostate carcinoma. Performance was validated in pre-planned analyses on external cohorts with over 3 000 patients across six cancer types. Exploratory analyses included over 1 500 additional patients from The Cancer Genome Atlas. Average Dice coefficient was over 80% in all validation cohorts with en bloc resection specimens and in The Cancer Genome Atlas cohorts. No loss of performance was observed when comparing the universal model with models specialised on single cancer types. In conclusion, extensive and rigorous evaluations demonstrate that generic tumour segmentation by a single model is possible across cancer types, patient populations, sample preparations, and slide scanners.


Full Triple Matcher: Integrating all triple elements between heterogeneous Knowledge Graphs

Yamamoto, Victor Eiti, Takeda, Hideaki

arXiv.org Artificial Intelligence

Knowledge graphs (KGs) are powerful tools for representing and reasoning over structured information. Their main components include schema, identity, and context. While schema and identity matching are well-established in ontology and entity matching research, context matching remains largely unexplored. This is particularly important because real-world KGs often vary significantly in source, size, and information density - factors not typically represented in the datasets on which current entity matching methods are evaluated. As a result, existing approaches may fall short in scenarios where diverse and complex contexts need to be integrated. To address this gap, we propose a novel KG integration method consisting of label matching and triple matching. We use string manipulation, fuzzy matching, and vector similarity techniques to align entity and predicate labels. Next, we identify mappings between triples that convey comparable information, using these mappings to improve entity-matching accuracy. Our approach demonstrates competitive performance compared to leading systems in the OAEI competition and against supervised methods, achieving high accuracy across diverse test cases. Additionally, we introduce a new dataset derived from the benchmark dataset to evaluate the triple-matching step more comprehensively.


'It's happening fast' – creative workers and professionals share their fears and hopes about the rise of AI

The Guardian

Oliver Fiegel, a 47-year-old photographer based in Munich, was reading a German national Sunday newspaper recently when he saw a front-page image that looked strangely off. The image showed a boy chasing a football on a pitch. But some of the wildflowers on the grass floated without stems. Half the goal net was missing. The boy's hands were misshapen.


Benchmarking Abstractive Summarisation: A Dataset of Human-authored Summaries of Norwegian News Articles

Touileb, Samia, Mikhailov, Vladislav, Kroka, Marie, Øvrelid, Lilja, Velldal, Erik

arXiv.org Artificial Intelligence

We introduce a dataset of high-quality human-authored summaries of news articles in Norwegian. The dataset is intended for benchmarking the abstractive summarisation capabilities of generative language models. Each document in the dataset is provided with three different candidate gold-standard summaries written by native Norwegian speakers, and all summaries are provided in both of the written variants of Norwegian -- Bokm{\aa}l and Nynorsk. The paper describes details on the data creation effort as well as an evaluation of existing open LLMs for Norwegian on the dataset. We also provide insights from a manual human evaluation, comparing human-authored to model-generated summaries. Our results indicate that the dataset provides a challenging LLM benchmark for Norwegian summarisation capabilities


Deep Learning-based Intraoperative MRI Reconstruction

Ottesen, Jon André, Storas, Tryggve, Vatnehol, Svein Are Sirirud, Løvland, Grethe, Vik-Mo, Einar O., Schellhorn, Till, Skogen, Karoline, Larsson, Christopher, Bjørnerud, Atle, Groote-Eindbaas, Inge Rasmus, Caan, Matthan W. A.

arXiv.org Artificial Intelligence

Purpose: To evaluate the quality of deep learning reconstruction for prospectively accelerated intraoperative magnetic resonance imaging (iMRI) during resective brain tumor surgery. Materials and Methods: Accelerated iMRI was performed during brain surgery using dual surface coils positioned around the area of resection. A deep learning (DL) model was trained on the fastMRI neuro dataset to mimic the data from the iMRI protocol. Evaluation was performed on imaging material from 40 patients imaged between 01.11.2021 - 01.06.2023 that underwent iMRI during tumor resection surgery. A comparative analysis was conducted between the conventional compressed sense (CS) method and the trained DL reconstruction method. Blinded evaluation of multiple image quality metrics was performed by two working neuro-radiologists and a working neurosurgeon on a 1 to 5 Likert scale (1=non diagnostic, 2=poor, 3=acceptable, 4=good, 5=excellent), and the favored reconstruction variant. Results: The DL reconstruction was strongly favored or favored over the CS reconstruction for 33/40, 39/40, and 8/40 of cases for reader 1, 2, and 3, respectively. Two of three readers consistently assigned higher ratings for the DL reconstructions, and the DL reconstructions had a higher score than their respective CS counterparts for 72%, 72%, and 14% of the cases for reader 1, 2, and 3, respectively. Still, the DL reconstructions exhibited shortcomings such as a striping artifact and reduced signal. Conclusion: DL shows promise to allow for high-quality reconstructions of intraoperative MRI with equal to or improved perceived spatial resolution, signal-to-noise ratio, diagnostic confidence, diagnostic conspicuity, and spatial resolution compared to compressed sense.