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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. 3 No. 2 (2021): IJoCED" : 6 Documents clear
Random Forest-based Fingerprinting Technique for Device-free Indoor Localization System Dwi Joko Suroso; Refa Rupaksi; Aditya Bagus Krisnawan; Nur Abdillah Siddiq
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 2 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v3i2.172

Abstract

The device-free indoor localization (DFIL) research is gaining attention due to the popularity of location-based service (LBS)-based advertisement. In DFIL, a user or an object does not need to bring any device to be localized. In this paper, we propose the Wi-Fi-based DFIL and the random forest algorithm for the fingerprint-based technique. The simple parameter commonly used in indoor localization is the Received Signal Strength Indicator (RSSI). We apply the fingerprint technique because of its reliability to handle the RSSI fluctuation and time-varying effect in a static indoor environment. We conducted an actual measurement campaign to observe the DFIL's implementation visibility. The DFIL system works by comparing the database fingerprint in an empty open office with the database in which a person is inside the measurement area without bringing any devices. Thus, we have the device-free RSSI database for fingerprint technique from both empty rooms and RSSI affected by a person inside the room. We validated the random forest algorithm results by comparing them with the k-nearest neighbor (kNN) and artificial neural network (ANN). The results show that our proposed system's accuracy is better than kNN and ANN with a mean error of 0.63 m than kNN with 0.80 m and ANN with 1.01 m. Meanwhile, the precision of the random forest is 0.63 m, whereas kNN and ANN are 0.67 m and 0.80 m, showing that the random forest performed better. We concluded that our simple DFIL system is visible to apply with acceptable accuracy performance.
An Application of Blended Palm Oil Waste in Brick Production Jusli, Euniza; Ling, Jen Hua; Bujang, Mastura; Ali, Dayang Siti Hazimmah; Lee, Toh Sing
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 2 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v3i2.175

Abstract

Cement brick is an essential construction component, which uses cement as the primary binder. The cement industry was identified as the major contributor to carbon dioxide emission, which is a greenhouse gas. The application of agro-industrial waste as partial cement replacement can reduce the negative impacts on the environment. In this study, the palm oil wastes, namely Palm Oil Clinker Powder (POCP) and Palm Oil Boiler Ash (POBA), were used as partial cement replacement. A total of 60 specimens were prepared with 0%, 10%, 20%, and 30% cement replacement by POCP and POBA. The physical and mechanical properties of bricks, such as density, water absorption, voids, and compressive strength, were investigated. The results show that the brick with 20% CP and BA could be used as a severe weathering brick.
Determining Crispness Level of Dry Food through Its Compressive Strain Energy Farid Triawan; Gloria Ellysian Aprilia; Kushendarsyah Saptaji; Ramadhona Saville; Asep Bayu Dani Nandiyanto
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 2 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v3i2.55

Abstract

Crispness is the most appealing characteristic of dry food products. However, the term crispness has different subjective meaning among consumers. This study aims to quantitatively measure the crispness of potato crisp by performing compression test on a single specimen, and analyzing the compressive behavior, i.e., compressive strain energy. The crispness of the specimens were differentiated by changing the moisture exposure durations, which are 0, 1, 2, 3, 6 hours, in a room and ambient condition. The measured load and displacement data were transformed into stress and strain curves. The strain energy for every 1% strain increment was calculated and investigated to determine the crispness. The crispness difference among specimens of 0, 3, and 6 hours groups was significantly perceived at 8% of strain. It was revealed that the 3 and 6 hours of room air exposure could decrease the crispness by 17% and 45%, respectively. This suggests the compressive strain energy at a certain strain can be an indicator of crispness. This experimental study is expected to evolve food engineering by proposing a simple yet precise crispness measurement method for dry food.
Design and Fabrication of Meat Shredder Machine Using VDI2221 Approach Muchamad Oktaviandri; Ng Siew Kian
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 2 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.703 KB) | DOI: 10.35806/ijoced.v3i2.150

Abstract

Shredded meat is more palatable to the taste of consumer and preparing shredded meat in a large scale requires the aid of meat shredder machine. This paper presents a detailed design procedure of a meat shredder machine developed by the VDI2221 approach. This paper also elaborates on the design of each part of the machine which includes selecting the components of the cutting and transmission system, kinematic arrangement of forces, material selection on the machine and proportion of parts to ensure the maximum strength and functionality of the machine. Further, the design of the various parts of the machine in 3D model and machine fabrication are discussed, along with the testing on the function and geometric aspects to ensure the efficiency of the machine. This study developed a meat shredder machine with 0.5 Hp electric motor and capacity of 2 kg per hour.
Analyzing Fast-ions Trajectories in a Nuclear Fusion Reactor through Its Poincaré-Island Size and Ripple Resonance Anggi Budi Kurniawan; Hiroaki Tsutsui
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 2 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v3i2.155

Abstract

Fast-ions confinement is a prominent subject in developing nuclear fusion reactors due to its importance in sustaining the burning plasma and keeping energy production. However, confining them has proven to be difficult until now, and one of the reasons is that the inherent discrete magnetic field produces a magnetic ripple. A better understanding of fast-ions transport using appropriate numerical calculation tools needs to be developed to overcome such a challenge in the engineering aspect. This study revisited data collection of fast ion transport simulated under the ripple presence in a nuclear fusion device. The ion trajectories were followed using two orbit-following equation schemes, and the ripple-resonance island size in the Poincaré section was compared. The result showed that the island size obtained by each scheme was different when the particle resonates with a stronger ripple field and, proportionally, the diffusion coefficients are different. The physical meaning and consequence behind this discovery were discussed in this paper.
Understanding the Climate Behavior Through Data Interpretation: Java-Bali-Nusa Tenggara Case Amartya Natayu; Fatima Tasya Kamila; Ida Bagus Gede Genta Dananjaya; Rhainna Rheizkhira Reflin; Muhamad Rausyan Fikri
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 2 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v3i2.184

Abstract

As an archipelago country in the equator, Indonesia has a tropical climate and often is subjected to monsoonal circulation. The geographical location affects Indonesia to have two seasons, which are the rainy season and drier season. Every season has its characteristic impacts against the mean temperature and rainfall rate. This research aims to analyze Indonesia’s mean temperature and rainfall rate data concerning its tropical climate. The areas observed are limited to Java, Bali, and Nusa Tenggara Island from January 2019 to December 2020. The data gathered from the official Badan Meteorologi Klimatologi dan Geofisika (BMKG) website were processed using MATLAB, and Spearman’s correlation was applied to analyze the rainfall and temperature data. From the observation, this study discovered that the mean temperature data is stable throughout the areas but reaches maximum during the transition between rainy and drier seasons and minimum during the middle of the rainy season. The data observation is often fluctuated, even though showing less rain during the drier season and more during rainy seasons. The fluctuation is affected by the geographical fact that Indonesia has a large water surface, which makes evaporation easily induced by warm tropical temperatures.

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