Search Results for author: Nils Hammerla

Found 12 papers, 6 papers with code

Causally-guided Regularization of Graph Attention Improves Generalizability

no code implementations20 Oct 2022 Alexander P. Wu, Thomas Markovich, Bonnie Berger, Nils Hammerla, Rohit Singh

Graph attention networks estimate the relational importance of node neighbors to aggregate relevant information over local neighborhoods for a prediction task.

Causal Inference Graph Attention +1

Graph Neural Networks for Link Prediction with Subgraph Sketching

1 code implementation30 Sep 2022 Benjamin Paul Chamberlain, Sergey Shirobokov, Emanuele Rossi, Fabrizio Frasca, Thomas Markovich, Nils Hammerla, Michael M. Bronstein, Max Hansmire

Our experiments show that BUDDY also outperforms SGNNs on standard LP benchmarks while being highly scalable and faster than ELPH.

Link Prediction

Towards more patient friendly clinical notes through language models and ontologies

no code implementations23 Dec 2021 Francesco Moramarco, Damir Juric, Aleksandar Savkov, Jack Flann, Maria Lehl, Kristian Boda, Tessa Grafen, Vitalii Zhelezniak, Sunir Gohil, Alex Papadopoulos Korfiatis, Nils Hammerla

Our method based on a language model trained on medical forum data generates simpler sentences while preserving both grammar and the original meaning, surpassing the current state of the art.

Language Modelling Text Simplification

Biomedical Concept Relatedness -- A large EHR-based benchmark

1 code implementation COLING 2020 Claudia Schulz, Josh Levy-Kramer, Camille Van Assel, Miklos Kepes, Nils Hammerla

We open-source a novel concept relatedness benchmark overcoming these issues: it is six times larger than existing datasets and concept pairs are chosen based on co-occurrence in EHRs, ensuring their relevance for the application of interest.

Retrieval

Estimating Mutual Information Between Dense Word Embeddings

no code implementations ACL 2020 Vitalii Zhelezniak, Aleks Savkov, ar, Nils Hammerla

In this work we go through a vast literature on estimating MI in such cases and single out the most promising methods, yielding a simple and elegant similarity measure for word embeddings.

Semantic Textual Similarity STS +1

Correlations between Word Vector Sets

1 code implementation IJCNLP 2019 Vitalii Zhelezniak, April Shen, Daniel Busbridge, Aleksandar Savkov, Nils Hammerla

Just like cosine similarity is used to compare individual word vectors, we introduce a novel application of the centered kernel alignment (CKA) as a natural generalisation of squared cosine similarity for sets of word vectors.

Semantic Textual Similarity STS +1

Neural Language Priors

no code implementations4 Oct 2019 Joseph Enguehard, Dan Busbridge, Vitalii Zhelezniak, Nils Hammerla

The choice of sentence encoder architecture reflects assumptions about how a sentence's meaning is composed from its constituent words.

Sentence

Multilingual Factor Analysis

1 code implementation ACL 2019 Francisco Vargas, Kamen Brestnichki, Alex Papadopoulos-Korfiatis, Nils Hammerla

In this work we approach the task of learning multilingual word representations in an offline manner by fitting a generative latent variable model to a multilingual dictionary.

Model Comparison for Semantic Grouping

1 code implementation30 Apr 2019 Francisco Vargas, Kamen Brestnichki, Nils Hammerla

We introduce a probabilistic framework for quantifying the semantic similarity between two groups of embeddings.

Semantic Similarity Semantic Textual Similarity +1

Sorting out symptoms: design and evaluation of the 'babylon check' automated triage system

no code implementations7 Jun 2016 Katherine Middleton, Mobasher Butt, Nils Hammerla, Steven Hamblin, Karan Mehta, Ali Parsa

Prior to seeking professional medical care it is increasingly common for patients to use online resources such as automated symptom checkers.

Towards Using Unlabeled Data in a Sparse-coding Framework for Human Activity Recognition

no code implementations25 Dec 2013 Sourav Bhattacharya, Petteri Nurmi, Nils Hammerla, Thomas Plötz

We propose a sparse-coding framework for activity recognition in ubiquitous and mobile computing that alleviates two fundamental problems of current supervised learning approaches.

Human Activity Recognition

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