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Stefanos Gkikas

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#artificial intelligence Preprint Aug 2026

UNWIND: Any-Length Facial Video for Stress Detection without Temporal Windowing

UNWIND is introduced, a facial-video framework for stress detection that analyzes a complete recording as a single model input, eliminating the need for temporal windowing or external segmentation and showing that complete-recording inference can be performed within a single unified model.

Stefanos Gkikas, Christian Arzate Cruz, Eric Nichols et al. · 0 citations
#machine learning Preprint Jul 2026

Towards a Unified Modality-Agnostic Multimodal Framework for Cognitive Workload Assessment

A unified, modality-agnostic, hierarchical Transformer-based architecture to process heterogeneous biosignal modalities within a single model is developed and EEG is the strongest single modality, ranking highest in IQ, GAME, and the pooled ALL setting.

Stefanos Gkikas, Christian Arzate Cruz, Calvin Joseph et al. · 9 citations
Preprint Aug 2026

A Multi-Scale Temporal Framework with Dynamic Fusion for EEG-Based Emotion Recognition

This study introduces a multi-scale temporal framework for EEG-based emotion recognition that is decomposed into windows of one or several durations, processed by a shared attention-based encoder, and integrated through a dynamic fusion module that assigns sample-specific weights across temporal scales.

Stefanos Gkikas, Yang-Lu Guo, Guang-Liang Li et al. · 3 citations
Book Open access Jul 2026

A Unified Tokenization Framework for Pain Recognition using Heterogeneous 3D Modalities

A unified tokenization framework for heterogeneous 3D modalities in pain recognition that provides a single processing pipeline across behavioral and brain-activity 3D data, without requiring separate architectures for each modality or handcrafted inductive biases is introduced.

Stefanos Gkikas, Christian Arzate Cruz, Valentina Becchetti et al. · 9 citations
Preprint Aug 2026

MUPA$^{2}$E: Multimodal Unified Perception with Asymmetric Attention for Emotion Assessment

The findings demonstrate the feasibility of processing structurally different neural and visual signals within a compact unified architecture while highlighting the importance of controlling duration-related cues in affective datasets.

Stefanos Gkikas, Eric Nichols, Christian Arzate Cruz et al. · 0 citations

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