Author

Yannis Panagakis

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#machine learning Preprint Oct 2026

LoCA: Enabling Multi-Modality in Geospatial Location Encoders

LoCA (Location Contrastive Alignment), a two-stage pipeline that satisfies two requirements a regularizer must satisfy for location encoding in multimodal regimes: co-alignment across modalities, since adapters alone cannot align independently pretrained encoders; and high effective rank, since the location encoder inh...

Panagiotis Koromilas, Eleanna Vali, Diogenis Antonopoulos et al. · 0 citations

#artificial intelligence Preprint Sep 2026

Contrastive Covariance Subspaces for Activation Steering

Activation steering controls large language model behavior by adding a direction to hidden activations during inference. For steering to work well, that direction must be a pure signal for the target concept: any confound entangled with it, such as an incidental topic or writing style, is injected into the residual str...

Alexandros Xenos, Manos Plitsis, N. Foteinopoulou et al. · 0 citations