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Deep Learning for Human Activity Recognition: Advances and Applications

A Special Issue of Applied Sciences (ISSN 2076-3417) belonging to the section "Computing and Artificial Intelligence".

Deadline for manuscript submissions: 20 January 2027 | Viewed by 1476

Editors


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Guest Editor
Department of Informatics and Telecommunications, University of Thessaly, 35100 Lamia, Greece
Interests: convolutional neural networks; human activity recognition; recurrent neural networks; telematics sensors; driving behaviour

E-Mail Website
Guest Editor
Department of Informatics and Telecommunications, University of Thessaly, 35100 Lamia, Greece
Interests: human activity recognition; computer vision; machine/deep learning and intelligent systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recent breakthroughs in deep learning have decisively transformed Human Activity Recognition (HAR), enabling machines to perceive, interpret, and anticipate human behavior with unprecedented accuracy and robustness. This Special Issue seeks high-quality contributions that push the methodological and application boundaries of HAR. Topics of interest include (but are not limited to) novel network architectures (e.g., graph neural networks, transformer-based models); efficient multimodal fusion of visual, inertial, and ambient-sensor data; self-supervised and few-shot learning strategies for data-scarce scenarios; on-device inference and model compression for edge deployment; privacy-preserving and federated learning frameworks; and trustworthy AI techniques addressing interpretability, fairness, and robustness. Beyond methodological innovations, we particularly welcome application-oriented studies in healthcare monitoring, sports analytics, smart environments, human–robot interaction, autonomous driving, and security. Submissions should present solid experimental validation, and open datasets or code where possible, and clearly articulate how the work advances the state of the art and broadens the practical impact of HAR.   

Dr. Ioannis Vernikos
Dr. Evaggelos Spyrou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • deep learning
  • human activity recognition
  • multimodal fusion
  • graph neural network
  • transformer
  • self-supervised learning
  • few-shot learning
  • edge AI
  • federated learning
  • privacy-preserving HAR
  • interpretable AI
  • smart healthcare
  • human–robot interaction

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Published Papers (1 paper)

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Research

23 pages, 11212 KB  
Article
Hear the Sweet Spot: Tennis Impact Localization via Single-Channel Audio
by Shaochi Zhang, Xiaoai Wang, Xuan Chang, Jing Zhang, Bruce X. B. Yu and Huan Hu
Appl. Sci. 2026, 16(14), 7340; https://doi.org/10.3390/app16147340 - 22 Jul 2026
Viewed by 589
Abstract
Identifying the impact location (“sweet spot”) on a tennis racket is crucial for performance evaluation in tennis training. However, existing approaches typically rely on expensive vision-based systems or specialized sensors, limiting their applicability in real-world scenarios. We propose a sound-sensor-based multi-task framework for [...] Read more.
Identifying the impact location (“sweet spot”) on a tennis racket is crucial for performance evaluation in tennis training. However, existing approaches typically rely on expensive vision-based systems or specialized sensors, limiting their applicability in real-world scenarios. We propose a sound-sensor-based multi-task framework for racket impact localization using acoustic signals, combining radial region classification with continuous position regression. To effectively model complex acoustic patterns, we design a multi-expert convolutional neural network (CNN) architecture with multi-scale feature extraction and task-specific optimization. Each expert branch operates at a different temporal receptive field and is trained with tailored loss functions, enabling complementary learning of global patterns, class imbalance characteristics, and hard samples. The shared backbone jointly supports both classification and regression tasks, allowing the model to learn more informative and structured representations. Experimental results demonstrate that the proposed framework consistently outperforms conventional methods in radial region classification while achieving accurate impact position estimation. Furthermore, additive noise augmentation significantly improves robustness, enabling stable performance under noisy and practical sensing conditions. Full article
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