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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 60 Documents
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Performance Optimization of Power Plant Waste Heat Using H2O-LiBr Absorption Refrigerant System Lydia Anggraini; Annisa Nur Wahyuni; Rendi Hernawan; Tetuko Kurniawan
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 1 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (585.782 KB) | DOI: 10.35806/ijoced.v4i1.243

Abstract

This paper examines the use of waste energy in a 3x1 MW Gas Engine Power Plant (GEPP) on Bawean Island, Indonesia. The feasibility method uses water-lithium bromide (H2O-LiBr) technology as absorption refrigeration technology. In addition, bananas are also used for cold storage to overcome waste energy utilization. The cold storage is placed in the 300 m3 area with a 100 kg load capacity for a banana with a temperature of 5oC, 85% humidity, 24 hours of operation, 1292 W cooling load, and 371 TR. This system is used because it utilizes a cheap energy source that dissipates heat from gas and has no ecological hazards, such as ozone layer depletion and global warming. The exhaust gas temperature is 500oC. Moreover, cooling loads for cold storage, which are used with thermodynamic models, and consistent fluid properties, performance, and size of cold storage were also investigated. The results obtained show that higher cold storage output comes from internal factors as compared to external factors. In addition, the absorption refrigerant with Tevaporation is 5oC, capacity 403 TR and Qabsorption is 984 kW, Qgenerator is 1066 kW, Qevaporation is 1411 kW, Qcondenser is 1493 kW, with an absorption coefficient of performance (COP) of 1.32 and power consumption of 158,25 kW. Furthermore, after calculations, analysis, and field experiments, it shows that the internal factor of the cooling load is higher than the external factor sourced from bananas in the cold storage. This phenomenon occurs probably due to the product being refrigerated, following the soar cooling capacity. Thus, the waste energy in PLTGU 3x1 MW has tried to be utilized by the refrigerant absorption system.
WebXR Asset Management in Developing Virtual Reality Learning Media Tombak Matahari
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 1 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (834.957 KB) | DOI: 10.35806/ijoced.v4i1.253

Abstract

Extended Reality (XR) is the technology that allows blending virtual and physical worlds using augmented reality (AR) and Virtual Reality (VR) to create a fully immersive experience. While WebXR is a web based XR environment built on a JavaScript framework that enables interactivity of AR and VR devices within the web browser. Contemporarily, educators are demanded to explore the variety of new media in practicing interactive learning, specifically in an academic environment. Arguably, VR has recently been identified as one of the most popular gamification mediums. It can create an environment that is both physically and digitally engaging. This paper reviews, simplifies as well as recommends a better component management system in the VR production pipeline using practice-based research methodology.
Evaluation of Kinetic Mechanism for Modelling Dimethyl Ether Jet Diffusion Flame Ahmad Syihan Auzani; Sheila Tobing; Ridhwan Sunandar; Riesta Anggarani; Cahyo Setyo Wibowo; Dedi Sutarma
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 2 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v4i2.298

Abstract

Many countries use liquefied petroleum gas (LPG) for various purposes, such as cooking and heating. As the population and the need for energy grow, demand for LPG steadily increases. This situation causes the rise in LPG imports for countries with an insufficient local supply, including Indonesia. To overcome this problem, the Indonesian Government plans to substitute LPG fuel with dimethyl ether (DME). However, stoves and household burners widely used in Indonesia are designed for LPG. Thus it is necessary to study the fuel flexibility of the burners. Many experimental studies on the substitution of LPG with DME are reported in the literature, but few models have been developed to simulate it. This paper aims to evaluate the performance of reaction mechanisms developed to model DME diffusion flames with various burner temperatures ranging from 300 to 1500 K. It was found that existing models could simulate the chemical structure of the flame but could not predict the formation of enthalpy of combustion reactions.
Deformation Behavior of Grouted Sleeve Wall Connector Under Shear Load in Precast Process of Concrete Wall Jen Hua Ling; Ahmad Baharuddin Abd. Rahman; Izni Syahrizal Ibrahim
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 2 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v4i2.263

Abstract

This study investigated the behaviour of grouted sleeve connectors under shear loads. Tapered Head Sleeve (THS) connectors were fabricated from mild steel pipes. Five test specimens and a control specimen were produced. Each test specimen comprised two walls, which were connected by THS. An incremental shear load was applied at the joint until the specimen failed. The behaviour of the specimens was analyzed based on the load-displacement response. The feasibility of THS as a wall connection was determined based on ductility ratio, failure mode, performance ratio, and serviceability ratio. THS required an embedded length of 8 times the bar diameter to generate sufficient bond strength. The specimens experienced bar dowel action, which led to a significant horizontal displacement with a ductility ratio of 27.5 to 55.9. The test specimens offered shear capacities comparable to the control specimen, with performance ratios close to 1.0. The service load was only 1/3 of the ultimate capacity, and thus THS was ineffective in resisting shear load. Shear keys would be required to strengthen the joint of the specimen.
Multiple Criteria Decision Analysis in HDMI Splitter Selection Using Complex Proportional Assessment Method Arisantoso Arisantoso; Teddy Mantoro; Akeem Olowolayemo; Abdullah Alkalbani
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 2 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v4i2.296

Abstract

High-Definition Multimedia Interface (HDMI) technology is used for devices such as HDTVs, Projectors, and DVD players. One HDMI cable can only connect one device, even though, when needed, one computer or laptop can be displayed on several televisions or projectors using HDMI Splitter. HDMI Splitter is an accessory that displays content on multiple screens. HDMI Splitter has been circulated with various brands that offer different capabilities and specifications. Therefore, Therefore, thorough consideration is needed in choosing the right HDMI Splitter. This study aims to build a decision support system with the Multiple Criteria Decision Analysis (MCDA) approach using Complex Proportional Assessment (COPRAS). The COPRAS method solves the selection problem by calculating the utility level of alternatives, which shows the extent to which an alternative is better or worse than other alternatives through a comparison process. Based on existing studies, the utility values of each alternative were obtained, namely: Robot HDMI Splitter producing a value of 53.73%, Vention HDMI Splitter producing a value of 65.63%, Bafo HDMI Splitter producing a value of 97.13, and PX HDMI Splitter producing a value of 100%. Hence, based on testing through the black box, the best alternative is PX HDMI Splitter.
A Review on Dynamic Buffer Traffic Condition Protocol in Telemedicine Matthew Iyobhebhe; Agburu Adikpe; James Gaina Bashayi; Amlabu Caleb Akezi; Ishaya Chollom Botson; Ezugwu Chukwudi; Omojola Bankole Akinyele
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 2 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v4i2.247

Abstract

Various MAC-protocol has been adopted over the years in Telemedicine, also known as Wireless Body Area Network system (WBANs), to enhance the proper transmission of the busy congestion of data message. However, these techniques could not coordinate traffic congestion in the receiver node, which could make the receiver nodes experience an "active mode" most of the time compared to the transmit node. This is dangerous to the network system because of uncontrollable energy usage. In this protocol, the intelligent sensor is strategically located around or implanted in the human body for the collection of human body physiological parameters. WBANs experienced some limitations such as latency and excessive consumption of energy which may hinder the lifetime maximization of the system if not taken care of properly. In this work, four elements are responsible for carrying-out only traffic data, and they are implemented by using the highest priority sensor nodes within a short period used for communicating to the Buffer Traffic Condition (BTC) discussed and the traffic measurement to mitigate active-mode interval in the receiving phase of the improved superframe structure of IEEE 802.15.6. Furthermore, meaningful information about the superframe to mitigate the busy traffic and enhance this protocol was also discussed as its possible functions with the help of an adaptive system. No article depicts the analysis of the work on the dynamic buffer traffic condition scheme, and this proposed scheme can improve on the existing one.
Finite Element Simulation of Power Weeder Machine Frame Angger Bagus Prasetiyo; Kartinasari Ayuhikmatin Sekarjati
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 2 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v4i2.291

Abstract

One of the agricultural technologies that have evolved recently is the weeding machine. This device was developed to aid farmers in the weed-control procedure. The engine frame is one of the primary elements of the weed wacker. The most crucial component of agricultural equipment is the frame or chassis since it serves as the foundation for mounting other parts. To examine the stress and strength of the frame, this study models the frame of a power weeder machine utilizing finite element analysis using the SolidWorks 2022 program. A total load of 120 N is applied to the AISI 316L used for the frame. The analysis's findings indicate that the maximum von Mises stress value is about 2.51 107N/m2, the greatest deformation is 0.556 mm, and the safety factor is 6.8. With AISI 316L material, the frame design of the power weeder machine in this study is safe to endure up to 140 N.
Methods to Increase Microalgae Carbohydrates for Bioethanol Production Esam Abu Baker Ali; Muhammad Idris; Irianto Irianto; Muhammad Zulkarnain; Syah Alam; Ayu Amanah; La Ode Muhammad Firman; Donny Mustika
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 4 No 2 (2022): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v4i2.301

Abstract

Compared to traditional lignocellulose biomass, microalgae contain little or no lignin. Traditionally, bioethanol production from microalgae undergoes three major steps: (i) pretreatment; (ii) polysaccharides hydrolysis into simple sugars; and (iii) sugar conversion into bioethanol by fermentation. Microalgae convert sunlight, water, and CO2 into algal biomass. Diatoms, green algae, bluegreen algae, and golden algae are four main classes of microalgae, whereas the two main species of algae are filamentous and phytoplankton algae. Microalgae convert solar energy efficiently, producing an enormous number of various metabolites. Many studies have been conducted to convert microalgae into various biofuels, such as biodiesel, bioethanol, biohydrogen, and biogas. However, compared to biodiesel, bioethanol production from algae throughfermentation consumes less energy with its simplified process. Considering these advantages, a number of potential applications for microalgae have been proposed and developed. Despite the promising of bioethanol from microalgae, it still has a number of obstacles, such as the low fermentable carbohydrate content of microalgae. This article intends to discuss the methods to increase microalgae carbohydrates thoroughly. To solve this problem, several nutritional starvations/limitations, like nitrogen and phosphorous starvation, are currently being considered in this paper.
Impact of School Chair on Left-Handed Students Nurul Retno Nurwulan
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 5 No 1 (2023): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v5i1.313

Abstract

Left-handed students find it challenging to do learning activities at school since the chair are made for those who are right-handed. They must change their posture, bending their neck and lower back, in order to reach the table that is located on the right side of the chair. Consequently, left-handed students may develop musculoskeletal disorders (MSDs) as a result of prolonged awkward posture in the classroom. This study sought to assess the effect of school chairs on the risk of MSDs in left-handed students. The possibility of reducing the discomfort by providing left-handed students with the appropriate chair was also examined. The Nordic Musculoskeletal Questionnaires (NMQ) was administered to a total of 14 left-handed students to identify their discomfort related to the chair they use in the classroom. The potential benefit of the proper chair was evaluated by measuring the deviation of the neck and low back from the upright sitting position. The finding of this study showed that a proper chair for left-handed students helps students sit straight without the need for bending their neck and low back. Modifying the chair to reduce the risk of MSDs is crucial, regardless of students’ handedness.
Study on Electron Tunneling Lifetime by Projected Green’s Function Approach in Single Quantum Well Semiconductor Yanoar Pribadi Sarwono; Rui-Qin Zhang; Gagus Ketut Sunnardianto
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 5 No 1 (2023): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v5i1.306

Abstract

The tunnelling lifetime of an electron in a single quantum well subject to an externally applied electric field is calculated using the Projected Green’s Function (PGF) approach. The lifetime in the biased single well decreases as a function of the electric field in good agreement with the previous result. The tunnelling lifetime is revealed with the behavior of the ground-state shift and the wave amplitude in the first well. As the electric field increases, the ground state energy shifts, leading to lessened constructive interference between the initial and reflected electron waves. Consequently, the study is essential to characterize the performance of high-speed quantum devices.

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