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International Hellenic University

Academic institutioneurope · gr
Official website
Research library12linked papers
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Selected work

Representative Papers

Earthquaker-AI: A Retrieval-Augmented Generation Framework with Rubric-Based Assessment for Primary School Earthquake Education

Jul 15, 2026

This study addresses the lack of integrated earthquake preparedness education for elementary students that effectively combines cognitive development, hands-on practice, and intelligent feedback. The work proposes an innovative system that integrates Lego WeDo2 robotics to simulate seismic scenarios with a retrieval-augmented generation (RAG)-based conversational AI. It introduces grade-adapted, multidimensional scoring rubrics to guide students in identifying, prioritizing, and articulating earthquake safety behaviors, thereby fostering self-regulated learning and calm crisis response. For the first time, RAG technology is coupled with an age-stratified, multidimensional assessment framework to advance learning from mechanical manipulation to cognitive reflection. The system strictly aligns with official safety guidelines to ensure factual accuracy, achieving high precision and low hallucination rates while significantly enhancing students’ earthquake knowledge, technological literacy, and early crisis-response capabilities.

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On the Performance of DCF in Full Duplex WLANs with Hidden Terminals

May 22, 2026

This study addresses the limited throughput gains of full-duplex (FD) WLANs in hidden terminal scenarios, where performance remains constrained by the CSMA/CA-based Distributed Coordination Function (DCF). The paper presents the first systematic modeling and theoretical analysis of saturated throughput for both FD and half-duplex (HD) WLANs under DCF in such environments. By developing an accurate analytical model, the work quantifies the throughput improvement achievable with FD operation and reveals that, under typical parameter settings, FD yields only a modest 10%–20% throughput gain over HD. These findings provide critical theoretical insights into the practical efficacy of FD in existing MAC-layer protocols and offer valuable guidance for future protocol design.

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Recent publications

Latest Papers

Earthquaker-AI: A Retrieval-Augmented Generation Framework with Rubric-Based Assessment for Primary School Earthquake Education

Jul 15, 2026

This study addresses the lack of integrated earthquake preparedness education for elementary students that effectively combines cognitive development, hands-on practice, and intelligent feedback. The work proposes an innovative system that integrates Lego WeDo2 robotics to simulate seismic scenarios with a retrieval-augmented generation (RAG)-based conversational AI. It introduces grade-adapted, multidimensional scoring rubrics to guide students in identifying, prioritizing, and articulating earthquake safety behaviors, thereby fostering self-regulated learning and calm crisis response. For the first time, RAG technology is coupled with an age-stratified, multidimensional assessment framework to advance learning from mechanical manipulation to cognitive reflection. The system strictly aligns with official safety guidelines to ensure factual accuracy, achieving high precision and low hallucination rates while significantly enhancing students’ earthquake knowledge, technological literacy, and early crisis-response capabilities.

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On the Performance of DCF in Full Duplex WLANs with Hidden Terminals

May 22, 2026

This study addresses the limited throughput gains of full-duplex (FD) WLANs in hidden terminal scenarios, where performance remains constrained by the CSMA/CA-based Distributed Coordination Function (DCF). The paper presents the first systematic modeling and theoretical analysis of saturated throughput for both FD and half-duplex (HD) WLANs under DCF in such environments. By developing an accurate analytical model, the work quantifies the throughput improvement achievable with FD operation and reveals that, under typical parameter settings, FD yields only a modest 10%–20% throughput gain over HD. These findings provide critical theoretical insights into the practical efficacy of FD in existing MAC-layer protocols and offer valuable guidance for future protocol design.

0 citationsRead paper