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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 84 Documents
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Fire Safety Assessment of a Typical Sports Hall Building Based on Fire Dynamics and Crowd Movement Models Thareq, Achmad Efrizal; Purnomo, Dwi Marhaendro Jati; Auzani, Ahmad Syihan; Nugroho, Yulianto Sulistyo; Santoso, Muhammad Agung
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 6 No. 2 (2024): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v6i2.458

Abstract

Fire risk analysis is one of the essential components of building design to ensure the safety of occupants and properties in case of fires. Currently, the Ministry of Public Works and Housing Regulation No. 20/PRT/M/2009 provides guidelines for conducting a fire risk analysis, however, without a clear consideration of fire dynamics in the estimation of the fire risk level. In this work, we investigate the fire safety aspects of a typical sports hall buildings by a fire dynamics deterministic model (Fire Dynamics Simulator (FDS) of the National Institute of Science and Technology, USA) and crowd movement model for occupant evacuation (Pathfinder of Thunderhead Engineering). Systematic investigations were made on the effects of the fire growth category and smoke extraction system on the Available Safe Egress Time (ASET). The results of ASET were then compared to the Required Safe Egress Time (RSET) which is obtained from the evacuation model. Our results suggest that ASET decreases exponentially with fire growth rate, especially from slow to medium growth rate. The fire growth rate significantly affects the acceptable fire risk of ASET longer than RSET. Occupant capacity, fire management systems, and smoke extraction systems play important roles in reducing fire risk. However, as the fire growth rate increases, the effects of smoke extraction in maintaining safe conditions diminish. This study provides recommendations to reduce risks to the occupants in case of fire, contributing to the considerations of the design and management of a typical sports hall building.
Heat Transfer Analysis and Friction Factor of Ternary Nanofluids with Twisted Tape Inserts Ramadhan, Anwar Ilmar; Azmi, Wan Hamzah; Lasman, As Natio; Umar, Efrizon; Sharma, Korada Viswanatha
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 6 No. 2 (2024): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v6i2.473

Abstract

This study investigates the heat transfer efficiency and friction factor of ternary nanofluids (Al₂O₃-TiO₂-SiO₂) in a simple tube equipped with a twisted tape. Ternary nanofluids, prepared using a volume-based composition ratio of 20:16:64, were tested at various volume concentrations ranging from 0.5% to 3.0%. Forced convection heat transfer experiments were conducted under varying Reynolds numbers (2,300 to 12,000) and a bulk temperature of 70 °C. The results indicate that the maximum viscosity occurs at a volume concentration of 3.0%. The highest increase in heat transfer for ternary nanofluids in a simple tube with twisted tape (H/D = 2.0) was achieved at a volume concentration of 3.0%, reaching 225.35%. Compared to a plain tube, the average thermal performance factor (TPF) of the twisted tape was significantly improved, with a further increase observed when the volume concentration rose from 2.73% to 3.22%.    
Evaluation of Cement Brick with Cocopeat as Partial Replacement of Sand Lim, Yong Tat; Ling, Jen Hua; Bujang, Ummi Humaira Binti; Leong, Wen Kam; Sia, How Teck; Chiong, Mary Mee Shi
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 1 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i1.481

Abstract

The rising population has fueled construction growth, increasing the demand for bricks and raising concerns about the depletion of raw materials, especially sand. To address this, research was carried out to investigate the utilization of cocopeat (CCP) as a partial sand replacement in the construction industry. In this study, a total of 72 specimens were manufactured with varying proportions of cocopeat to replace sand, ranging from 0% to 25%. A 1:2.5 of cement-to-sand ratio and 0.5 of water-to-cement ratio were used. Performance of the cement brick was evaluated based on dimension, compressive strength, density, water absorption, crack development, and effective strength-to-weight ratio (  ratio). Results showed that all bricks met industrial requirements. Satisfactory compressive strength was achieved with 5% to 15% of cocopeat, meeting the minimum requirements in British Standard BS 3921:1985. Bricks with 5% to 10% of cocopeat have no crack on the sample. These bricks resulted in a lower density than solid bricks, while still fulfilled the percentage of water absorption requirements of British Standard, 1985. Cement bricks with 5% and 10% cocopeat had an effective strength-to-weight ratio (  ratio) above 1.0. Notably, brick with 10% cocopeat fulfilled all the industry requirements. Therefore, the cocopeat can be recommended as a partial replacement in brick production.
Optimizing Malware Detection and Prevention on Proxy Servers Through Random Forest and Lexical Feature Analysis Andalas Saputra, Meitro Hartanto; Pebrianti, Dwi; Bayuaji, Luhur; Rusdah
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 1 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i1.485

Abstract

Malware has become a significant concern due to the increase in malicious websites hosting spam, phishing, malware, and other threats. This research aims to predict malware URLs using lexical features for feature extraction and random forest for classification. The dataset, sourced from kaggle.com, includes benign, phishing, spam, malware, and defacement URLs. To address data imbalance, random oversampling was applied for balanced training. Recursive feature elimination was used to optimize lexical features, testing various sets of features (10, 15, 19, 23, 29, 35) for classification accuracy, achieving 98% accuracy using 23 features. Validation tests with actual university network data confirmed this model’s effectiveness, classifying malicious URLs in 9 minutes using 11,566 samples. URL filtering involved log analyzer tools capturing internet traffic during working hours over one month. Results suggest that this approach can efficiently classify malicious URLs and could be implemented for real-time detection in proxy server logs, aiding IT departments in preventing malware spread via web traffic.
Impact Behavior of Multi-Layered UHMWPE Vests Reinforced with Titanium and PVC for Ballistic Protection Muzhaffar Effendi, Nabil; Sastranegara, Azhari; Hernawan, Rendi; Anggraini, Lydia
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 1 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i1.504

Abstract

Achieving lightweight and high-performance bulletproof vests is essential for military and law enforcement, where balancing mobility and ballistic resistance is critical. This study investigates the ballistic performance of multi-layered Ultra-High Molecular Weight Polyethylene (UHMWPE) vests reinforced with titanium (Ti6Al4V) and polyvinyl chloride (PVC). Two innovative vest configurations were evaluated following National Institute of Justice (NIJ) Standard-0101.04 ballistics tests and simulated using the Finite Element Method (FEM). Experimental findings indicated that while Vest 1 significantly absorbed impact energy, it failed to prevent projectile penetration. In contrast, Vest 2, incorporating additional titanium and polymer layers, effectively mitigated the penetration of 9 mm Full Metal Jacket (FMJ) projectiles while maintaining a safe back-face signature (BFS). The FEM simulation results demonstrated strong agreement with the experimental data, validating the effectiveness of multi-material layering in enhancing ballistic resistance. This research presents a strategic integration of titanium and polymer composites designed to achieve superior ballistic resistance while maintaining lightweight properties. These findings provide valuable insights for developing advanced body armor designs suitable for high-performance military and law enforcement applications.
Effect of Chip Breaker Geometries on Cutting Force A Finite Element Analysis Fawzi Zamria, Mohd; Nor Sufyan Sudin, Mohd; Nur Rosyidi, Cucuk; Bin Yusoff, Ahmad Razlan
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 1 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i1.505

Abstract

Continuous chip formation during metal cutting operations poses substantial challenges, from deteriorating surface finish to accelerated tool wear. Our research examines how six chip breaker geometric parameters of insert rake angle, land, radius, width, height, and nose radius influence cutting forces in turning operations. Using DEFORM-3D, we simulated 27 distinct chip breaker configurations based on Taguchi's L27 orthogonal array while maintaining constant cutting parameters of 275 mm/min speed, 0.2 mm/rev feed, and 1.0 mm depth. ANOVA findings showed that nose radius was most influential with F-ratio equal to 27.41, followed by insert width and rake angle. The optimized geometry of the rake angle is 16°, the land is 0.1 mm, the radius is 0.5 mm, width is 2.0 mm, height is 0.25 mm, and the nose radius is 0.8 mm achieved the lowest cutting force of 798 N, a 15.8% reduction from the experimental average. This research replaces traditional trial-and-error approaches with systematic optimization, providing manufacturers with specific guidelines for enhancing chip control, surface quality, and tool life in industrial applications.
Measuring E-Commerce Customer Satisfaction and Loyalty in Jakarta Using E-SERVQUAL and IPA Case Study JD.ID Islam, Sri Susilawati; Redi, Anak Agung Ngurah Perwira; Lestari, Tika Endah; Prasetyo, Yogi Tri; Effendi, Nabila Salsabillah; Young, Michael Nayat
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 1 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i1.506

Abstract

In order to improve customer satisfaction and loyalty to e-commerce, certain aspects of e-service quality need to be emphasized. To evaluate the collected data, the study employs SEM-PLS, and Importance Performance Map Analysis (IPA). The findings show that variables such as website reliability, security, compensation, responsiveness, personalization, and assurance significantly affect consumer satisfaction, which in turn has a positive influence on customer loyalty. According to the results of the IPA research, e-commerce must concentrate on security factors which have 0.086 importance to strengthen its security controls and increase customer loyalty and trust. Hence, to maintain high-priority variables, e-commerce should also maintain website design variables and customer satisfaction.
Standardizing Wudhu Place Design for Standing Position User Using Quality Function Deployment (QFD) Oktaviandri, Muchamad; Syas, Mulyanti; Mukrim Bin Azman, Muhammad; Pradhana Revi, Dipo; Zaki Zaidan, Hilman
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 1 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i1.494

Abstract

The wudhu place is where Muslims perform ablution, washing particular parts of the body using water before performing prayer (shalat). Previous study has focused on finding the best wudhu place design for sitting positions. However, there are not many studies focusing on standardizing the wudhu place for standing position. Therefore, this paper attempts to address the gap in the research by studying the ergonomic aspect and standardizes for designing male wudhu places for standing positions using Quality Function Deployment (QFD). This includes the voice of the customer and the House of Quality. QFD is an effective design method to integrate ergonomics needs and comfort into wudhu place design, as it explicitly addresses the translation of customer requirements into engineering characteristics. This method is employed to identify the important criteria for improving the design of the wudhu place. Data is collected from existing and customer surveys of wudhu place. The objective of this study is to compare and to find the best measure for standardizing the wudhu places to enhance comfort and ergonomics. Based on the study, three main criteria have been standardized: a) the distance between the tap water from the standing position should be 74 cm to 84 cm b) the distance between two taps should be 14 cm to 17 cm c) the distance of the tap water from the wall should be 64 cm to 71 cm.
Lessons Learned from Challenges in Developing a Test Setup to Replace a Faulty Universal Testing Machine Ling, Jen Hua; Chin, Wei Jun; Ling, Bing Liang; Su, Vincent Liang Cheng
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 2 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i2.496

Abstract

This study addresses the challenges encountered in developing a test setup to replace a malfunctioning Universal Testing Machine (UTM). The setup was designed using a portal frame, hydraulic jack system, data acquisition system, and beam reaction system to simulate compressive forces on concrete-filled tube (CFT) specimens. Significant issues arose, including deformation of the steel plate, which failed to uniformly distribute stress; excessive out-of-plane deformation of the supporting steel beam; and load cell damage due to overloading. These problems resulted from inappropriate load simulation, inaccurate measurements, and safety concerns. Despite multiple mitigation attempts, the setup was ultimately unsuccessful and discontinued. Displacement discrepancies reached 90.9% and 76.7% in Setup 1 and Setup 2, respectively, while strength discrepancies of 31.9% to 46.2% were observed in identical specimens. This research highlights the complexities of replicating precise testing conditions and underscores the need for thorough planning and expertise in experimental design. To guide future setups, this study recommends a strength hierarchy, in ascending order: specimen, hydraulic cylinder, load cell, steel beam, and portal frame, to ensure safety and reliability in test execution.
Parametric Finite Element Method-Based Analysis of Curved Sandwich Structures under Projectile Impact Bagaskara, Galang; Arifvianto, Budi; Mahardika, Muslim; Mao, Zebing; Wiranata, Ardi
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 7 No. 2 (2025): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v7i2.508

Abstract

This study aims to develop a Python and Gmsh-based program for automating the generation of finite element method (FEM) models and integration with the OpenRadioss solver, enabling more efficient creation of a FEM model for a curved corrugated sandwich structure under projectile impact. Based on the research conducted, the program has been successfully integrated with OpenRadioss and successfully simulated. The simulation results show a graph that closely matches experimental data, indicating that the generated finite element model is acceptable. The time required to generate the model is approximately ±73 s, while conventional methods require at least ±480 s. Additionally, this program has been compared with the latest Graphical User Interfaces (GUI) provided by OpenRadioss, demonstrating the advantages of the developed program in terms of time efficiency, ease of use, and its ability to handle design variations more quickly.

Page 8 of 9 | Total Record : 84

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