AHCI RESEARCH GROUP
Publications
Papers published in international journals,
proceedings of conferences, workshops and books.
OUR RESEARCH
Scientific Publications
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You can expand the Abstract, Links and BibTex record for each paper.
2025
Ozeki, R.; Yonekura, H.; Rizk, H.; Yamaguchi, H.
Cellular-based Indoor Localization with Adapted LLM and Label-aware Contrastive Learning Proceedings Article
In: pp. 138–145, Institute of Electrical and Electronics Engineers Inc., 2025, ISBN: 9798331586461 (ISBN).
Abstract | Links | BibTeX | Tags: Cellular Network, Cellulars, Computer interaction, Contrastive Learning, Deep learning, Human computer interaction, Indoor Localization, Indoor Navigation, Indoor positioning, Indoor positioning systems, Language Model, Large language model, Learning systems, Mobile computing, Mobile-computing, Signal processing, Smart Environment, Wireless networks
@inproceedings{ozeki_cellular-based_2025,
title = {Cellular-based Indoor Localization with Adapted LLM and Label-aware Contrastive Learning},
author = {R. Ozeki and H. Yonekura and H. Rizk and H. Yamaguchi},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-105010820397&doi=10.1109%2FSMARTCOMP65954.2025.00070&partnerID=40&md5=9e15d9f4225f00cd57bedc511aad27d9},
doi = {10.1109/SMARTCOMP65954.2025.00070},
isbn = {9798331586461 (ISBN)},
year = {2025},
date = {2025-01-01},
pages = {138–145},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {Accurate indoor positioning is essential for mobile computing, human-computer interaction, and next-generation smart environments, enabling applications in indoor navigation, augmented reality, personalized services, healthcare, and emergency response. Cellular signal fingerprinting has emerged as a widely adopted solution, with deep learning models achieving state-of-the-art performance. However, existing approaches face critical deployment challenges, including labor-intensive fingerprinting, sparse reference points, and missing RSS values caused by environmental interference, hardware variability, and dynamic signal fluctuations. These limitations hinder their scalability, adaptability, and real-world usability in complex indoor environments. To address these challenges, we present GPT2Loc a novel indoor localization framework that integrates LLM with label-aware contrastive learning, improving accuracy while reducing reliance on extensive fingerprinting. LLMs effectively extract meaningful spatial features from incomplete and noisy RSS data, enabling robust localization even in sparsely finger-printed areas. Our label-aware contrastive learning approach further enhances generalization by aligning latent representations with spatial relationships, allowing GPT2Loc to interpolate user locations in unseen areas and mitigate signal inconsistencies. © 2025 Elsevier B.V., All rights reserved.},
keywords = {Cellular Network, Cellulars, Computer interaction, Contrastive Learning, Deep learning, Human computer interaction, Indoor Localization, Indoor Navigation, Indoor positioning, Indoor positioning systems, Language Model, Large language model, Learning systems, Mobile computing, Mobile-computing, Signal processing, Smart Environment, Wireless networks},
pubstate = {published},
tppubtype = {inproceedings}
}
Accurate indoor positioning is essential for mobile computing, human-computer interaction, and next-generation smart environments, enabling applications in indoor navigation, augmented reality, personalized services, healthcare, and emergency response. Cellular signal fingerprinting has emerged as a widely adopted solution, with deep learning models achieving state-of-the-art performance. However, existing approaches face critical deployment challenges, including labor-intensive fingerprinting, sparse reference points, and missing RSS values caused by environmental interference, hardware variability, and dynamic signal fluctuations. These limitations hinder their scalability, adaptability, and real-world usability in complex indoor environments. To address these challenges, we present GPT2Loc a novel indoor localization framework that integrates LLM with label-aware contrastive learning, improving accuracy while reducing reliance on extensive fingerprinting. LLMs effectively extract meaningful spatial features from incomplete and noisy RSS data, enabling robust localization even in sparsely finger-printed areas. Our label-aware contrastive learning approach further enhances generalization by aligning latent representations with spatial relationships, allowing GPT2Loc to interpolate user locations in unseen areas and mitigate signal inconsistencies. © 2025 Elsevier B.V., All rights reserved.
2021
Scianna, Andrea; Gaglio, Giuseppe Fulvio; Guardia, Marcello La; Nuccio, Gaia
Development of a Virtual CH Path on WEB: Integration of a GIS, VR, and Other Multimedia Data Journal Article
In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 12642 LNCS, pp. 178–189, 2021.
Abstract | Links | BibTeX | Tags: Digital Photogrammetry, Geographical Information Systems, Historic Preservation, Indoor Navigation, Virtual Reality
@article{sciannaDevelopmentVirtualCH2021a,
title = {Development of a Virtual CH Path on WEB: Integration of a GIS, VR, and Other Multimedia Data},
author = { Andrea Scianna and Giuseppe Fulvio Gaglio and Marcello La Guardia and Gaia Nuccio},
editor = { Fink E. Cantoni L. Champion E. Ioannides M.},
doi = {10.1007/978-3-030-73043-7_15},
year = {2021},
date = {2021-01-01},
journal = {Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)},
volume = {12642 LNCS},
pages = {178--189},
publisher = {Springer Science and Business Media Deutschland GmbH},
abstract = {Recent advances in computer science allowed people to explore new possibilities for the fruition of CH all around the world. The development of Geographic Information Systems (GIS) in the field of territorial systems and the evolution of Virtual Reality (VR) solutions opened new scenarios for the valorization of cultural goods. At the same time, recent advances in digital photogrammetry and 3D interactive navigation models on WEB-based on WebGL technologies offered new opportunities of digital fruition of CH. Considering this panorama, the presented work shows how the integration of these technologies gives a precious added value to the virtual fruition of CH. In particular, it has been considered a cultural path in the La Loggia district, located into the historic centre of Palermo. This area is rich in monuments, many of them not accessible to the public, within the I-ACCESS European Project. The starting idea was to enlarge and diffuse, as much as possible, the accessibility to the knowledge of cultural goods in a virtual way, stimulating at the same time their real fruition. The developed solution implemented a GIS platform HTML 5 based and freely available online from desktop and mobile devices. In the virtual tour, everyone could navigate inside the cultural path, accompanied by touristic information, and come and visit the indoor environments of the main monuments. This work offers a new approach to accessibility and represents an example of how new technologies could support the diffusion of knowledge of CH. textcopyright 2021, Springer Nature Switzerland AG.},
keywords = {Digital Photogrammetry, Geographical Information Systems, Historic Preservation, Indoor Navigation, Virtual Reality},
pubstate = {published},
tppubtype = {article}
}
Recent advances in computer science allowed people to explore new possibilities for the fruition of CH all around the world. The development of Geographic Information Systems (GIS) in the field of territorial systems and the evolution of Virtual Reality (VR) solutions opened new scenarios for the valorization of cultural goods. At the same time, recent advances in digital photogrammetry and 3D interactive navigation models on WEB-based on WebGL technologies offered new opportunities of digital fruition of CH. Considering this panorama, the presented work shows how the integration of these technologies gives a precious added value to the virtual fruition of CH. In particular, it has been considered a cultural path in the La Loggia district, located into the historic centre of Palermo. This area is rich in monuments, many of them not accessible to the public, within the I-ACCESS European Project. The starting idea was to enlarge and diffuse, as much as possible, the accessibility to the knowledge of cultural goods in a virtual way, stimulating at the same time their real fruition. The developed solution implemented a GIS platform HTML 5 based and freely available online from desktop and mobile devices. In the virtual tour, everyone could navigate inside the cultural path, accompanied by touristic information, and come and visit the indoor environments of the main monuments. This work offers a new approach to accessibility and represents an example of how new technologies could support the diffusion of knowledge of CH. textcopyright 2021, Springer Nature Switzerland AG.
Scianna, Andrea; Gaglio, Giuseppe Fulvio; Guardia, Marcello La; Nuccio, Gaia
Development of a Virtual CH Path on WEB: Integration of a GIS, VR, and Other Multimedia Data Journal Article
In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 12642 LNCS, pp. 178–189, 2021, (Publisher: Springer Science and Business Media Deutschland GmbH).
Abstract | Links | BibTeX | Tags: Diffusion of knowledge, Digital Photogrammetry, European project, Geographic information systems, Geographical Information Systems, Historic centres, Historic Preservation, Indoor environment, Indoor Navigation, Interactive navigations, Multimedia data, Virtual fruitions, Virtual Reality
@article{scianna_development_2021,
title = {Development of a Virtual CH Path on WEB: Integration of a GIS, VR, and Other Multimedia Data},
author = {Andrea Scianna and Giuseppe Fulvio Gaglio and Marcello La Guardia and Gaia Nuccio},
editor = {Cantoni L. Fink E. Ioannides M.},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105938016&doi=10.1007%2f978-3-030-73043-7_15&partnerID=40&md5=45494a3e37eafb745566e37f8e627fe2},
doi = {10.1007/978-3-030-73043-7_15},
year = {2021},
date = {2021-01-01},
journal = {Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)},
volume = {12642 LNCS},
pages = {178–189},
abstract = {Recent advances in computer science allowed people to explore new possibilities for the fruition of CH all around the world. The development of Geographic Information Systems (GIS) in the field of territorial systems and the evolution of Virtual Reality (VR) solutions opened new scenarios for the valorization of cultural goods. At the same time, recent advances in digital photogrammetry and 3D interactive navigation models on WEB-based on WebGL technologies offered new opportunities of digital fruition of CH. Considering this panorama, the presented work shows how the integration of these technologies gives a precious added value to the virtual fruition of CH. In particular, it has been considered a cultural path in the La Loggia district, located into the historic centre of Palermo. This area is rich in monuments, many of them not accessible to the public, within the I-ACCESS European Project. The starting idea was to enlarge and diffuse, as much as possible, the accessibility to the knowledge of cultural goods in a virtual way, stimulating at the same time their real fruition. The developed solution implemented a GIS platform HTML 5 based and freely available online from desktop and mobile devices. In the virtual tour, everyone could navigate inside the cultural path, accompanied by touristic information, and come and visit the indoor environments of the main monuments. This work offers a new approach to accessibility and represents an example of how new technologies could support the diffusion of knowledge of CH. © 2021, Springer Nature Switzerland AG.},
note = {Publisher: Springer Science and Business Media Deutschland GmbH},
keywords = {Diffusion of knowledge, Digital Photogrammetry, European project, Geographic information systems, Geographical Information Systems, Historic centres, Historic Preservation, Indoor environment, Indoor Navigation, Interactive navigations, Multimedia data, Virtual fruitions, Virtual Reality},
pubstate = {published},
tppubtype = {article}
}
Recent advances in computer science allowed people to explore new possibilities for the fruition of CH all around the world. The development of Geographic Information Systems (GIS) in the field of territorial systems and the evolution of Virtual Reality (VR) solutions opened new scenarios for the valorization of cultural goods. At the same time, recent advances in digital photogrammetry and 3D interactive navigation models on WEB-based on WebGL technologies offered new opportunities of digital fruition of CH. Considering this panorama, the presented work shows how the integration of these technologies gives a precious added value to the virtual fruition of CH. In particular, it has been considered a cultural path in the La Loggia district, located into the historic centre of Palermo. This area is rich in monuments, many of them not accessible to the public, within the I-ACCESS European Project. The starting idea was to enlarge and diffuse, as much as possible, the accessibility to the knowledge of cultural goods in a virtual way, stimulating at the same time their real fruition. The developed solution implemented a GIS platform HTML 5 based and freely available online from desktop and mobile devices. In the virtual tour, everyone could navigate inside the cultural path, accompanied by touristic information, and come and visit the indoor environments of the main monuments. This work offers a new approach to accessibility and represents an example of how new technologies could support the diffusion of knowledge of CH. © 2021, Springer Nature Switzerland AG.