Gihan Gamage

Mr. Gihan Gamage


Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
18 April 2024 in Energies
Verified
Journal Article
Open access
PDF file
AMAmali Matharaarachchi
Amali Matharaarachchi
WMWishmitha Mendis
Wishmitha Mendis
KRKanishka Randunu
Kanishka Randunu
DSDaswin De Silva
Daswin De Silva
GGGihan Gamage
Gihan Gamage
AJAndrew Jennings
Andrew Jennings
Internet-of-Things (IoT) technologies have been steadily adopted and embedded into energy infrastructure following the rapid transformation of energy grids through distributed consumption, renewables generation, and battery storage. The data streams produced by such energy IoT infrastructure can be extracted, processed, analyzed, and synthesized for informed decision-making that delivers optimized grid operations, reduced costs, and net-zero carbon emissions. However, the voluminous nature of such data streams leads to an equally large number of analysis outcomes that have proven ineffective in decision-making by energy grid operators. This gap can be addressed by introducing artificial intelligence (AI) chatbots, or more formally conversational agents, to proactively assist human operators in analyzing and identifying decision opportunities in energy grids. In this research, we draw upon the recent success of generative AI for optimized AI chatbots with natural language understanding and generation capabilities for the complex information needs of energy IoT infrastructure and net-zero emissions. The proposed approach for optimized generative AI chatbots is composed of six core modules: Intent Classifier, Knowledge Extractor, Database Retriever, Cached Hierarchical Vector Storage, Secure Prompting, and Conversational Interface with Language Generator. We empirically evaluate the proposed approach and the optimized generative AI chatbot in the real-world setting of an energy IoT infrastructure deployed at a large, multi-campus tertiary education institution. The results of these experiments confirm the contribution of generative AI chatbots in simplifying the complexity of energy IoT infrastructure for optimized grid operations and net-zero carbon emissions.

7 February 2026 in Knowledge-Based Systems
Verified
Journal Article
Open access
AMAmali Matharaarachchi
Amali Matharaarachchi
HMHarsha Kumara Moraliyage
Harsha Kumara Moraliyage
NMNishan Mills
Nishan Mills
GGGihan Gamage
Gihan Gamage
DSDaswin De Silva
Daswin De Silva
MMMilos Manic
Milos Manic

11 August 2025 in Symmetry
Verified
Journal Article
Open access
PDF file
KPKirishnni Prabagar
Kirishnni Prabagar
KSKogul Srikandabala
Kogul Srikandabala
NLNilaan Loganathan
Nilaan Loganathan
SJShalinka Jayatilleke
Shalinka Jayatilleke
GGGihan Gamage
Gihan Gamage
DSDaswin De Silva
Daswin De Silva
Fake news generation and propagation occurs in large volumes, at high speed, in diverse formats, while also being short-lived to evade detection and counteraction. Despite its role as an enabler, Artificial Intelligence (AI) has been effective at fake news detection and prediction through diverse techniques of both supervised and unsupervised machine learning. In this article, we propose a novel Artificial Intelligence (AI) approach that addresses the underexplored attribution of information asymmetry in fake news detection. This approach demonstrates how fine-tuned language models and emotion embeddings can be used to detect information asymmetry in intent, emotional framing, and linguistic complexity between content creators and content consumers. The intensity and temperature of emotion, selection of words, and the structure and relationship between words contribute to detecting this asymmetry. An empirical evaluation conducted on five benchmark datasets demonstrates the generalizability and real-time detection capabilities of the proposed AI approach.

Verified
Journal Article
Open access
PDF file
ADAshan Dhananjaya
Ashan Dhananjaya
GGGihan Gamage
Gihan Gamage
SSSivaluxman Sivananthavel
Sivaluxman Sivananthavel
NMNishan Mills
Nishan Mills
DSDaswin De Silva
Daswin De Silva
MMMilos Manic
Milos Manic
Sleep is increasingly acknowledged as a cornerstone of public health, with chronic sleep loss implicated in preventable injury and deaths. Obstructive sleep apnea (OSA) affects over one billion people worldwide but remains widely under-diagnosed due to dependence on polysomnography (PSG), an overnight, hospital-based intrusive procedure. As an adjunct to the clinical diagnosis of OSA, this paper presents a low-cost, smartphone-based Generative AI agent framework for sleep apnea detection and sleep coaching at the bedside. Powered by an on=device Generative AI model, the four agents of this framework include a classifier, an analyser, a visualiser, and a sleep coach. The key agent activities performed are sleep apnea detection, sleep data management, data analysis, and natural language sleep coaching. The framework was empirically evaluated on a subject-independent hold-out set drawn from a dataset of 500 clinician annotated clips collected from 10 clinically diagnosed OSA patients. Sleep apnea detection achieved an accuracy of 0.89, precision of 0.91, and recall of 0.88, with nightly Apnea–Hypopnea Index (AHI) estimates strongly correlated with PSG-based clinical scores. The framework was further assessed on the performance metrics of computation, latency, memory, and energy usage. The results of these experiments confirm the feasibility of the proposed framework for large-scale, low-cost OSA screening, with pathways for future work in federated learning, noise robustness, and broad clinical validation.