Nasir, Haidawati
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Systematic Literature Review on Ontology-based Indonesian Question Answering System Admojo, Fadhila Tangguh; Lajis, Adidah; Nasir, Haidawati
Knowledge Engineering and Data Science
Publisher : citeus

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Question-Answering (QA) systems at the intersection of natural language processing, information retrieval, and knowledge representation aim to provide efficient responses to natural language queries. These systems have seen extensive development in English and languages like Indonesian present unique challenges and opportunities. This literature review paper delves into the state of ontology-based Indonesian QA systems, highlighting critical challenges. The first challenge lies in sentence understanding, variations, and complexity. Most systems rely on syntactic analysis and struggle to grasp sentence semantics. Complex sentences, especially in Indonesian, pose difficulties in parsing, semantic interpretation, and knowledge extraction. Addressing these linguistic intricacies is pivotal for accurate responses. Secondly, template-based SPARQL query construction, commonly used in Indonesian QA systems, suffers from semantic gaps and inflexibility. Advanced techniques like semantic matching algorithms and dynamic template generation can bridge these gaps and adapt to evolving ontologies. Thirdly, lexical gaps and ambiguity hinder QA systems. Bridging vocabulary mismatches between user queries and ontology labels remains a challenge. Strategies like synonym expansion, word embedding, and ontology enrichment must be explored further to overcome these challenges. Lastly, the review discusses the potential of developing multi-domain ontologies to broaden the knowledge coverage of QA systems. While this presents complex linguistic and ontological challenges, it offers the advantage of responding to various user queries across various domains. This literature review identifies crucial challenges in developing ontology-based Indonesian QA systems and suggests innovative approaches to address these challenges.
Real-time Deep Learning Detection of Toraja Carving Motifs using YOLO11m for Cultural Heritage Preservation Herman, Herman; Mufti, Farid Wajdi; Manga, Abdul Rachman; Nasir, Haidawati
Knowledge Engineering and Data Science
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Abstract

Toraja carvings are an important part of Indonesia’s cultural heritage, rich in symbolic, aesthetic, and philosophical meaning. However, the identification and preservation of carving motifs still rely on subjective, time-consuming manual processes, limiting scalability and inconsistent knowledge transmission. From a Knowledge Engineering and Cognitive Data Science perspective, this challenge highlights the need for mechanisms that can transform visual cultural artifacts into structured, machine-interpretable knowledge. This study investigates the use of the YOLO11m model as a data-driven approach for modeling cultural knowledge through automated detection of three Toraja carving motifs: pa_tedong, pa_kapu_baka, and pa_manu_londongan using original images collected directly from traditional Tongkonan houses. A total of 222 high-resolution images were manually annotated and preprocessed through resizing to 640×640 pixels and auto-orientation for input standardization, then divided into 70% training, 20% validation, and 10% testing sets. The model was trained on an NVIDIA A100 GPU using the Ultralytics framework in Google Colab and evaluated using precision, recall, F1-score, and mean Average Precision (mAP). Experimental results show that YOLO11m achieved an mAP@0.5 of 96.5%, demonstrating robust performance in capturing complex visual and semantic patterns despite challenges such as motif similarity and data imbalance. Beyond detection accuracy, the findings indicate that deep learning–based object detection can support the systematic documentation, interpretation, and reuse of cultural knowledge, contributing to scalable digital preservation of traditional cultural artifacts. Future work will explore larger datasets, optimized hyperparameters, and advanced detection models to further enhance the robustness of cultural knowledge representations further.