1 code implementation • Conference on Health, Inference, and Learning 2024 • Mariia Sidulova, Seyed Kahaki, Ian Hagemann, Alexej Gossmann
Clustering can be used in medical imaging research to identify different domains within a specific dataset, aiding in a better understanding of subgroups or strata that may not have been annotated.
1 code implementation • 21 Mar 2024 • Xudong Sun, Carla Feistner, Alexej Gossmann, George Schwarz, Rao Muhammad Umer, Lisa Beer, Patrick Rockenschaub, Rahul Babu Shrestha, Armin Gruber, Nutan Chen, Sayedali Shetab Boushehri, Florian Buettner, Carsten Marr
DomainLab is a modular Python package for training user specified neural networks with composable regularization loss terms.
1 code implementation • 20 Mar 2024 • Xudong Sun, Nutan Chen, Alexej Gossmann, Yu Xing, Carla Feistner, Emilio Dorigatt, Felix Drost, Daniele Scarcella, Lisa Beer, Carsten Marr
We address the online combinatorial choice of weight multipliers for multi-objective optimization of many loss terms parameterized by neural works via a probabilistic graphical model (PGM) for the joint model parameter and multiplier evolution process, with a hypervolume based likelihood promoting multi-objective descent.
no code implementations • 22 Feb 2024 • Jean Feng, Harvineet Singh, Fan Xia, Adarsh Subbaswamy, Alexej Gossmann
Machine learning (ML) algorithms can often differ in performance across domains.
no code implementations • 20 Nov 2023 • Jean Feng, Adarsh Subbaswamy, Alexej Gossmann, Harvineet Singh, Berkman Sahiner, Mi-Ok Kim, Gene Pennello, Nicholas Petrick, Romain Pirracchio, Fan Xia
When an ML algorithm interacts with its environment, the algorithm can affect the data-generating mechanism and be a major source of bias when evaluating its standalone performance, an issue known as performativity.
1 code implementation • 28 Jul 2023 • Jean Feng, Alexej Gossmann, Romain Pirracchio, Nicholas Petrick, Gene Pennello, Berkman Sahiner
In a well-calibrated risk prediction model, the average predicted probability is close to the true event rate for any given subgroup.
1 code implementation • 17 Nov 2022 • Jean Feng, Alexej Gossmann, Gene Pennello, Nicholas Petrick, Berkman Sahiner, Romain Pirracchio
Performance monitoring of machine learning (ML)-based risk prediction models in healthcare is complicated by the issue of confounding medical interventions (CMI): when an algorithm predicts a patient to be at high risk for an adverse event, clinicians are more likely to administer prophylactic treatment and alter the very target that the algorithm aims to predict.
no code implementations • 21 Mar 2022 • Jean Feng, Gene Pennello, Nicholas Petrick, Berkman Sahiner, Romain Pirracchio, Alexej Gossmann
Each modification introduces a risk of deteriorating performance and must be validated on a test dataset.
1 code implementation • 13 Oct 2021 • Jean Feng, Alexej Gossmann, Berkman Sahiner, Romain Pirracchio
In the COPD study, BLR and MarBLR dynamically combined the original model with a continually-refitted gradient boosted tree to achieve aAUCs of 0. 924 (95%CI 0. 913-0. 935) and 0. 925 (95%CI 0. 914-0. 935), compared to the static model's aAUC of 0. 904 (95%CI 0. 892-0. 916).
1 code implementation • 7 Jun 2019 • Xudong Sun, Alexej Gossmann, Yu Wang, Bernd Bischl
A novel variational inference based resampling framework is proposed to evaluate the robustness and generalization capability of deep learning models with respect to distribution shift.
no code implementations • 1 Apr 2019 • Peyman Hosseinzadeh Kassani, Alexej Gossmann, Yu-Ping Wang
The study of healthy brain development helps to better understand the brain transformation and brain connectivity patterns which happen during childhood to adulthood.
1 code implementation • 11 May 2017 • Alexej Gossmann, Pascal Zille, Vince Calhoun, Yu-Ping Wang
Here we propose a way of applying the FDR concept to sparse CCA, and a method to control the FDR.
1 code implementation • 17 Oct 2016 • Damian Brzyski, Alexej Gossmann, Weijie Su, Malgorzata Bogdan
Sorted L-One Penalized Estimation (SLOPE) is a relatively new convex optimization procedure which allows for adaptive selection of regressors under sparse high dimensional designs.
Methodology 46N10 G.1.6