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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
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
Articles 18 Documents
DECOMPOSITION OF NITROUS OXIDE OVER CU/TIO2 CATALYSTS: THE EFFECT OF CU LOADING, TIO2 STRUCTURE, AND REACTION CONDITIONS Yanagida, K.; Kurniawan, W.; Salim, C.; Hinode, H.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 2 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (480.555 KB) | DOI: 10.35806/ijoced.v1i2.63

Abstract

Decomposition of nitrous oxide (N2O) over titania (TiO2) supported copper (Cu) catalyst was investigated with the existence of oxygen and water vapor. The catalytic activity of TiO2 was promoted by copper loading. It was found that there are optimum levels of copper loading on TiO2, and these values are correlated to the specific surface area of TiO2 support being used. The relationship between the catalytic activity for decomposition of N2O and the crystal structure of TiO2 was also investigated. The result revealed that Cu/TiO2 catalysts with the rutile structure has a higher activity toward N2O decomposition than those with the anatase structure. In this research, Cu(5wt%)/TiO2 prepared from TiO2 JRC-TIO-4 (reference catalyst provided by Catalysis Society of Japan) which was mainly constituted of rutile showed the highest activity for N2O decomposition and it could decompose N2O completely at 650?. The catalytic activity was inhibited by the existence of oxygen. However, there was no influence of water vapor to the catalytic activity of Cu/TiO2 for N2O decomposition. 
INSTITUTIONAL CHANGE AND THE IMPACT TOWARDS INNOVATION COMPETITIVENESS IN THE INDUSTRIAL DEVELOPMENT OF THE BATAM FREE TRADE ZONE Wiryawan, B. A.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 1 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (404.468 KB) | DOI: 10.35806/ijoced.v1i1.32

Abstract

The purpose of this study is to evaluate an implementation of the batam free trade zone in industrial development. A survey was conducted in 2015 involving 17 firms from different areas of the zone. Relationships between variables were established using Fischer?s Exact Test. Result indicates that there is significant relationship between institutions and innovation, judging by research, designing, and development related activities, fewer than 95% confidence level. The problem lies in the conflicts between the FTZ Authority and the local governments, as the latter continued to dominate the institutional settings. The results indicated that weak vision towards FTZ policy and zero-sum approach by key actors contributed the most to the failure in reindustrialize the zone.
IMPACTS OF MOBILE PHONE DISTRACTIONS ON WALKING PERFORMANCE Selamaj, G
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 2 No 1 (2020): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.379 KB) | DOI: 10.35806/ijoced.v2i1.101

Abstract

This work studies the effect of playing mobile phones while walk-ing to pedestrian safety. Thirty young-adults were observed while walking around Skanderbeg square with and without playing Pokemon GO. Results show that the walking performance deteri-orated when the participants played Pokemon GO as can be seen from the average number of laps decreased from 2.47 to 1.58 laps, the average number of collisions increased from 0.27 to 3.93, and the average number of slip, trip and fall increased from 0.03 to 2.07. It can be concluded that using mobile phone while walking could be dangerous for pedestrian safety.
FACTORS AFFECTING USERS’ ACCEPTANCE ON ENTERPRISE RESOURCE PLANNING SYSTEMS IN YEMEN ORGANIZATIONS AlSanabani, A. S.; Al-Awlaqi, M. A.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 2 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (398.467 KB) | DOI: 10.35806/ijoced.v1i2.59

Abstract

This study aims to unravel the factors that might have the potential to facilitate or hinder the Enterprise Resource Planning (ERP )system in the Yemen Organizations. Methods were done by interviewing 197 respondents from some Yemen organizations. The results of this study found significant positive correlationsbetween the intention to use and easiness of the ERP system. Several dependent variables were also obtained. Moreover, thecurrent study obtained the importance of human factors in thecontext of ERP.
A REVIEW ON MEASUREMENT METHODS FOR MACHINING INDUCED RESIDUAL STRESS Saptaji, K.; Afiqah, S. N.; Ramdan, R. D.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 2 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (580.515 KB) | DOI: 10.35806/ijoced.v1i2.64

Abstract

The chip formation in mechanical machining / cutting process involves thermal loading and mechanical loading in the form of large plastic deformations, high strain, strain rates and high temperatures in the cutting zone. These loadings usually induce plastic deformation in the form of residual stresses in the surface and sub-surface of the machined workpiece. Residual stress issue is essential to be studied in order to control the quality and fatigue life of a component or part produced by machining process. Therefore, the magnitude and depth of the residual stresses into the workpiece sub-surface is important and necessary to be measured. The objective of this paper is to discuss various study on the effects of machining parameters on residual stress and residual stress measurement methods for machined workpiece namely non-destructive, semi-destructive and destructive methods. In addition, the effect of machining process into the metallurgical conditions of the workpiece in the form of microstructural changes is also discussed.
PROMOTING HIGHER EDUCATION ABROAD PROGRAM IN SCIENCE AND ENGINEERING TO INDONESIAN HIGH SCHOOLS: METHODS, CHALLENGES AND RECOMMENDATIONS Triawan, F.; Biddinika, M. K.; Hanaoka, S.; Budiman, B. A.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 1 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (887.891 KB) | DOI: 10.35806/ijoced.v1i1.33

Abstract

This paper examines the promotional activities of higher education abroad program of Tokyo Institute of Technology (Tokyo Tech), Japan, namely  Global Scientists and Engineers Program (GSEP), that was carried out in Indonesia. The objective is to document the lessons learned in the form of promotional methods, to identify the challenges, and to summarize some reccomendations. GSEP is an international Bachelor of Engineering degree program in Tokyo Tech majoring in Transdisciplicnary Scince and Engineering that is launched in 2015. This program is fully taught in English, thus it expects to attract more international students, such as from Asian countries, to  pursue  higher  education  in  Tokyo  Tech. For  this reason, the promotional activities in Indonesia was done in August 2016 by presentation in front of thirteen high schools in Jakarta and  nearby.  For  improvement  of  future  promotion  effort, participants were requested to express their evaluation regarding content  and  delivery  of  the  material  presentation  by  fulfilling questionnaire survey. The results reveal several interesting facts about Indonesian high school students, such as their willingness to study  abroad  even  without  scholarship,  and  some  important aspects on how to effectively promote higher education abroad program in science and engineering in Indonesia.
DYNAMIC CONTACT ANGLE AND CORROSION TEST MEASUREMENTS ON CU AND CUO-STEARIC ACID MODIFICATIONS ON STEEL SURFACES Setiawan, I; Trisnanto, S R; Suryani, I O
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 2 No 1 (2020): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.729 KB) | DOI: 10.35806/ijoced.v2i1.103

Abstract

In this study, a copper (Cu) coated steel surface?s dynamic con-tact angle and corrosion rate was compared to the bare steel and stearic acid modified surfaces. Various steps of surface treatment have been performed including electrodeposition of Cu, CuO formation from H2O2 immersion with stearic acid modi-fication to obtain dynamic contact angle and the corrosion rate data. The Cu-coated steel?s dynamic contact angle was increased as it implied the surface after Cu treatment was more hydro-philic than the bare steel, with sliding angle and contact angle hysteresis of 54.9o ± 2.39o and 39.5o ± 1.91o, respectively. How-ever, corrosion test measurements by using a mass loss method to quantify the corrosion rate showed that Cu-coated steel and stearic acid-modified Cu-O coated steel had no remarkable dif-ference in corrosion rate. It was found that the Cu-coated steel and stearic acid-modified Cu-O coated steel had corrosion rate eight times slower than the bare surface.
EFFECTIVE GRAPH PROTECTION METHOD TO PREVENT THE SPREADING OF ATTACKS IN NETWORKS Wijayanto, A. W.; Pindarwati, A.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 2 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.025 KB) | DOI: 10.35806/ijoced.v1i2.61

Abstract

Networks are fundamental models for representing and analyzing the structures of real-world systems. For instance, in social networks, nodes are used to represent users and edges represent the connection between users. Networks are also termed as graphs in the discrete mathematics language. One essential problem in networks is how to protect a limited number of nodes to prevent the spreading of malicious attacks or dangerous rumor in the networks, which is known as the graph protection problem. In this paper, an effective graph protection method called PowerShield is proposed which pre-emptively protects critical nodes prior to any incoming attacks. It combines connectivity and centrality criteria of the input graph. Connectivity criterion is measured by the principal eigenvector, i.e., the eigenvector corresponding to the largest eigenvalue of the adjacency matrix of the input graph. Centrality criterion is defined by the degree centrality which considers nodes having more neighborhood relations to be more important. Contrary to the existing state-of-the-art method which takes into account only the connectivity criterion, the proposed method combines both criteria and empirically improves the effectiveness of protection result.
EVALUATING THE EFFECTIVENESS OF JAPAN’S CLIMATE CHANGE MITIGATION AND CLEAN TECHNOLOGY DEVELOPMENT POLICIES Ihara, I; Zhao, R; Pandyaswargo, A H; Onoda, H
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 2 No 1 (2020): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (625.086 KB) | DOI: 10.35806/ijoced.v2i1.98

Abstract

The energy sector has been the highest contributor of green-house gases (GHG) emission in Japan. To reduce GHG emissions, the development and applications of cleaner technologies sup-ported by effective policies are required. In this study, the effec-tiveness of Japanese government policies related to climate change mitigation especially in the technology development sec-tor was analyzed. To do so, two methodologies; 1) results-based approach (RBA) and 2) case-based approach (CBA) will be com-bined to test the effectiveness of government policies. This com-bination was conducted to fill the missing data required to con-duct the two methodologies. The merging of the two methodolo-gies produced indexes where the proximity of the performance of each policy measured to it would determine its effectiveness. In order to verify the results, the number of projects related to the policy took place over the years was also observed. The results show that the most effective policies were related to the follow-ing technologies: 1) Energy management, 2) Biomass energy pro-duction, and 3) Electric power storage.
AN ECONOMIC EVALUATION ON SCALING-UP PRODUCTION OF NANO GOLD FROM LABORATORY TO INDUSTRIAL SCALE Miftahurrahman, G.; Setiarahayu, H.; Nandiyanto, A. B.D.
Indonesian Journal of Computing, Engineering and Design (IJoCED) Vol 1 No 1 (2019): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (694.096 KB) | DOI: 10.35806/ijoced.v1i1.34

Abstract

Gold nanoparticles are applicable in various engineering fields such as in biosensors, drug delivery, and tumor imaging. The objective of this study was to evaluate the scaling-up production of gold nanoparticles from laboratory to industrial scale. The evaluation was done from engineering and economic perspectives, in which several parameters including gross profit margin (GPM), and payback period (PBP) were analyzed. From the engineering evaluation, the result showed that the production of Nano gold is prospective using current technologies. To produce Nano gold, we could use chloroauric acid, sodium citrate, and sodium borohydride, in which these materials can be converted into gold nanoparticles. From the economic evaluation, the result showed that Nano gold production in industry scale can be profitable with a certain condition of raw material. It was shown that the breakeven point, payback period and gross profit margin could be achieved in 20 years.

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