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Indonesian Journal of Computing, Engineering and Design (IJoCED) Faculty of Engineering and Technology - Sampoerna University L’Avenue Office Tower, North Tower 6th Floor, Jl. Raya Pasar Minggu Kav. 16, Jakarta Selatan 12780, Indonesia
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INDONESIA
Indonesian Journal of Computing, Engineering, and Design
Published by Universitas Sampoerna
ISSN : 26561972     EISSN : 26568179     DOI : https://doi.org/10.35806/ijoced.v1i1.31
Core Subject : Science, Art, Engineering,
Arts Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Indonesian Journal of Computing, Engineering and Design (IJoCED) is an international and open access peer-reviewed journal, published by Faculty of Engineering and Technology, Sampoerna University. IJoCED published original research papers, state of the art reviews and innovative projects on topics leveraging all aspects of Computing, Engineering & Design and their cross-disciplinary applications: from theory to practice. Thus, manuscripts that cover any related issues are encouraged to be submitted to IJoCED. The IJoCED is committed to providing access to quality research article in the area of Computing, Engineering & Design and the cross-disciplinary among areas for all interested readers. The IJoCED will be published two times a year in April and October. The below mentioned fields are the scope and focus for IJoCED. The IJoCED also welcomes innovative articles related any Computing, Engineering and Design fields. Computing: • Smart Embedded Computing • Data Science/ Analytics • Educational computing • Intelligent Systems & Robotics • IT and Social Change • Internet of Things • Business Information Systems • Health Information Systems • Software Engineering • Computer System & Networking • E-Commerce & E-Business • Green Computing • IS Project Management • Smart Technology • Data Analytics for Big Data • Intelligent System for Organizations • Information Security Engineering: • Bioprocess Engineering • Civil Engineering • Energy Engineering • Environmental Engineering • Geotechnical Engineering • Genetic Engineering • Industrial Engineering • Bioprocess Engineering • Industrial Engineering • Social Engineering • Physics Engineering • Chemical Engineering • Electrical Engineering • Computer Engineering • Food Engineering • Geotechnical Engineering • Chemical Engineering • Manufacturing Engineering • Materials Engineering • Engineering Education Design: • Visual Communication Design • Photography • Visual Literacy • Communication Technologies • Human-Computer Interaction • User-based Design • Digital Art • Graphics, Art, and Design • Advertising Design • Theory of Perception • User Experience
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol. 8 No. 1 (2026): IJoCED" : 6 Documents clear
Utilization of Tea Waste and Silico Manganese Slag in Cement Brick Tat, Lim Yong; Jen Hua , Ling; Bujang, Mastura Binti; Mohamad, Mazizah Ezdiani binti; Saffaee, Nur Saffrina Binti; Siat, Qurratu Aini Binti; Xiao Jing, Lim
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 8 No. 1 (2026): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/g1j9ea62

Abstract

Bricks are commonly utilized construction materials composed of sand, cement, and water in standardized ratios. Such demand of construction materials could result in the exhaustion of natural resources. In order to tackle this problem, researchers are investigating the utilization of alternate substances including tea waste and silico manganese slag as partial replacement for sand and cement respectively in bricks. The study utilized a sand/cement ratio of 1:2.5 and a water/cement ratio of 0.5, along with the inclusion of 5-15% tea waste and 10-20% silico manganese slag in the mix percentage. The experimental findings demonstrated that by substituting tea waste and silico manganese slag into the cement brick, the brick exhibited sufficient compressive strength and water absorption properties, satisfying the minimum masonry unit requirements specified in the British Standard of 1985. Furthermore, the density of the cement brick with tea waste and silico manganese slag was found to be lower than the solid bricks, classifying it as a lightweight brick. All of the cement bricks containing tea waste and silico manganese slag met the criterion for the effective strength to weight ratio, except for the bricks made with 15% tea waste and 10% silico manganese slag. Based on the results, it was determined that the proposed mix proportion for the cement brick was the brick consists of 15% tea waste and 20% silico manganese slag. Such brick with the highest effective strength to weight ratio of 1.16 was suitable to be used in the construction industry.
The UX Redesign Design Approach of Nationwide Bank Mobile Contact Page Siyanbola, Babatunde; Afolabi, Eni-itan-F Benjamin
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 8 No. 1 (2026): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v8i1.542

Abstract

Understanding customers’ digital experiences is necessary in building customers' confidence in financial institutions. User experience (UX) design in the financial sector is vital in shaping customers' confidence during support-induced interactions on digital platforms. The bank's website contact page is a critical touchpoint for resolving customers' banking challenges and managing their finances. Noticeably, financial institution websites' contact pages often show usability issues such as poor information architecture and low accessibility compliance, causing high drop-off rates. The contact page is an integral part of Nationwide's support channels and depends on accessibility, usability, and efficiency. Financial institutions often focus on improving the customer experience to optimize functionality and reduce the challenges of high drop-off rates. Findings from user persona development, iterative usability testing, click paths, and accessibility principles, along with core usability tests, reveal user pain points, inaccessible contact options, less functional visual aids for users with visual impairments, and the inability of features to support personalization of contact options. Consequently, the Nationwide Bank contact page was redesigned, and the redesigned prototype was tested by 120 participants. System Usability Scale (SUS) scores indicate improvements in usability and 20% reduction in task completion time. The insights generated from this study add to the usability framework for designing user-centered, trustworthy touchpoints for regulated customer-oriented businesses. It also deepens scholarship on accessibility compliance iterative workflows, emphasizing their implications for banking services.
Sentiment Analysis of Multi-Brand Skincare Product Reviews Using IndoBERT Fine-Tuning Yumna, Irsalina; Rahmatulloh, Alam
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 8 No. 1 (2026): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v8i1.562

Abstract

The Female Daily platform predominantly features consumer reviews characterized by informal Indonesian and English code-mixing. This specific linguistic complexity presents a significant impediment to traditional classification methods, such as classical machine learning algorithms (e.g., Naive Bayes and SVM) and lexicon-based approaches, which often fail to accurately capture semantic nuances and contextual dependencies in unstructured text. To fill this research gap, this study uses a deep learning method with fine-tuned IndoBERT for multi-brand sentiment analysis. Using a dataset of 12,418 reviews across five popular skincare brands, the model achieved an accuracy of 85%, an F1-score of 0.84, a precision of 0.85, and a recall of 0.84. A key contribution of this research is the multi-brand analysis, which reveals distinct consumer perception patterns: Wardah and Emina achieved the highest proportions of positive sentiment, while Skintific and Garnier demonstrated a more balanced distribution between positive and negative reviews. In contrast, MS Glow exhibited more varied and diverse consumer opinions. These findings confirm that IndoBERT’s self-attention mechanism is highly effective and adaptive in processing the informal, code-mixed vocabulary of the beauty community, outperforming traditional methodologies in both robustness and contextual understanding.
Improving Learning Experience of High School Gen Z by Designing the Student Worksheet Using Gamification, Augmented Reality, Emotional Design, and Storytelling Mulcki, Remandhia; Putra, Hadi Jaya; Rachel, Fransiska
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 8 No. 1 (2026): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijocedv8i1.574

Abstract

The development of digital technology has transformed the learning behaviors of Generation Z, who prefer interactive, visual, and experience-based learning. Conventional models, such as lectures and text-based student worksheets (LKS), are less effective at maintaining motivation and engagement. This study aims to develop and evaluate the effectiveness of a gamified LKS, enriched with storytelling, emotional design, and augmented reality (AR), at SMA Plus Muthahhari Bandung. A Participatory Action Research (PAR) approach was employed, involving teachers, students, and the school principal as active partners throughout each phase. A total of 30 students, consisting of 14 males and 16 females from grades X, XI, and XII, participated in the trial and completed a Likert-scale questionnaire ranging from 1 (strongly disagree) to 5 (strongly agree). The findings indicate that four key dimensions—Engagement and Motivation, Learning Experience, Technical Aspects, and Visual Gamification Elements—achieved mean scores above 4 with high reliability (Cronbach’s α ranging from 0.845 to 0.948). The t-test revealed significant gender differences in Learning Experience and Technical Aspects, while the ANOVA test across grade levels showed no significant differences. The AR-based gamified LKS proved effective in enhancing focus, motivation, and the overall learning experience.
Participatory Recontextualization of Wayang Serok Baros for Contemporary Relevance Putri, Arum Githa; Soemardi, Arlene Dwiasti
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 8 No. 1 (2026): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v8i1.591

Abstract

Rapid media transformation and fast-paced changes in youth preferences become the main challenge for community-based cultural practices. In Desa Baros, West Java, Wayang Serok becomes one of the representations of a living tradition with high potential as a medium of inspiration for cultural heritage activation. This study explores other approaches in safeguarding a heritage – to translate cultural narratives into contemporary forms that are relatable for younger generation (Generation Z). The research combines a Participatory Learning Action framework by integrating Design Thinking process as co-creation in character and merchandise design inspired by Wayang Serok symbolism. Data gathered from field observation with local cultural representatives was analyzed alongside a survey to design an engaging merchandise suitable for Gen Z’s preferences and cultural consumptions. The findings suggest that design intervention – stylized character interpretation and accessible personalized trinkets – can function as mediators between traditional narratives and contemporary youth identity expression. Exhibitions, feedback, and digital engagement indicate that narrative-driven accessories can build emotional attachment and curiosity toward the topic. This study also proposes a participatory design approach that may potentially broaden other inclusive approaches as strategies to recontextualize many intangible heritages in the economic and creative ecosystem.
Mechanical Properties of Sustainable Paving Blocks Using Fly Ash and Polypropylene Plastic Waste Sahputra, Deded Eka; Fakhrul Siddiq; Nanang Fatchurrohman
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 8 No. 1 (2026): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v8i1.596

Abstract

The increasing generation of industrial and plastic waste has encouraged the development of sustainable construction materials. This study investigates the mechanical properties of zero-cement paving blocks utilizing Polypropylene (PP) plastic waste as the sole binder and fly ash as a sand substitute. A direct thermo-mechanical melting process at 180°C–200°C was employed without the use of water or chemical activators. To ensure sufficient binder volume, the PP ratio was fixed at 4 parts. Specimens were tested for compressive strength and water absorption according to the Indonesian National Standard (SNI 03-0691-1996). The results demonstrated a clear dependency between the filler ratio and mechanical performance; a 25% substitution of sand with fly ash achieved the optimal performance, yielding a maximum compressive strength of 11.59± 0.84 MPa and a remarkably low water absorption rate of 0.75 ± 0.31%, while the lowest water absorption of 0.62 ± 0.07% was achieved by the control mixture. However, increasing the fly ash substitution to 50% resulted in a strength reduction due to the inability of the fixed PP matrix to completely encapsulate the high surface area of the fine fly ash particles. Although classified as Quality D paving blocks, this purely waste-derived composite presents a highly viable, eco-friendly solution specifically targeted for light-duty infrastructure applications, such as pedestrian walkways and city parks.  

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