Indonesia Conference Directory

Corresponding Author
Sofyan Noor Arief

Institutions
a) Information Technology, State Polytechnic Of Malang
Jalan Soekarno Hatta No.9, Kota Malang 65141, Indonesia

*sofyan[at]polinema.ac.id

Abstract
Mathematics equation of the RSA is the complicated one between the other asymmetric encryption method. It makes the RSA method needs more resources than the others. Most existing studies are trying to make another encryption method that need less computational resources, but it is less secure than using the RSA algorithm. In this paper, we proposed the Distributed Computing method to accommodate the limited computing resources in a single worker. We will distribute the computational process of RSA encryption and decryption to numerous workers. The test results showed that the implementation of Distributed Computing method made the encryption and decryption process finished faster. In conclusion, it increased completion time, made the encrypted data serve faster, and maximized the computational resources.

Keywords
Encryption, RSA, Distributed Computing, Distributed Encryption

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/a6GX7Wu8ZyPT

Corresponding Author
Luthfi Nurwandi

Institutions
a) Industrial Engineering, Universitasi Islam Bandung
b) Industrial Management, National Taiwan University of Science and Technology

Abstract
Due to the TFT LCD manifestation into many related products, this industry has been growing rapidly along with demand increasing. To satisfy the demand, most companies have increased their production capacity and capability by increasing their number of factories in different places and causing complexity in this industry. Therefore, companies are required to optimize their production and distribution system. Thin film transistor–liquid crystal display (TFT LCD) panel manufacturing supply chain can be generally divided into three stages: array, cell, and module processes. Special characteristic of the TFT LCD manufacturing compared with other manufacturing is different capacity unit between its production chains. The capacity unit of array and cell is defined by the number of glass substrate, while the capacity unit of module is represented by the number of panel. TFT LCD manufacturing which is a multi-stage and multi-site supply chain requires high computational for optimizing the production and distribution of their array, cell, and module. This study develops a production and distribution planning model for the multi-stage and multi- site supply chain in TFT LCD industry. Genetic algorithm is proposed in this research to solve the problem. Maximizing capacity utilization and total profit in the supply chain are become the major performance indicator in this model. Experimental results show that the proposed algorithm is performs better than the comparison method. Robustness of the proposed algorithm is successfully justified by numerical experiment and a case study. For time efficiency of the proposed algorithm, parallel – genetic algorithm is designed in this research.

Keywords
TFT LCD panel manufacturing, production and distribution, multi-stage,multi-site, genetic algorithm, parallel computation.

Topic
Industrial Engineering

Link: https://ifory.id/abstract/MgCnVf9ZERBD

Corresponding Author
Ginanjar Suwasono Adi

Institutions
Program of Telecommunication Engineering, Department of Electrical Engineering, Politeknik Negeri Bandung, Jl. Gegerkalong Hilir Ds. Ciwaruga Mailbox 1234, Bandung 40012, Indonesia
*ginanjar.adi[at]polban.ac.id

Abstract
A quest of vacant parking space in the public area can indirectly lead to traffic congestion which can be troublesome for drivers in terms of time efficiency. This study is expected to assist drivers to get the available parking slots information in a real-time manner and support the parking control systems by constantly updating the information of vacant parking slots positions in public areas. A vision-based parking slots recognition method is proposed to identify occupied areas by vehicles which is divided into two main parts: setup configuration and object detection. Canny Edge and Hough Line Transform are used to achieve line detection for parallel parking slot marking; contour extraction and bounding rectangular are then applied for an initial parameter to form a reference area as a region of interest (ROI). Moreover, Structural Similarity Index Measurement (SSIM) exploits the reference image and target image to identify whether the area is empty or occupied by vehicle depending on structure comparison. Experimental result shows, from 50 sample images of parking slots attained by surveillance camera, the detection accuracy of 92% and precision of 89% are obtained using selected features with tuning SSIM threshold level of 0.4.

Keywords
Image processing, parking slot detection, canny edge detection, hough line transform, structural similarity index

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/JjcMKrHwqPND

Corresponding Author
Miftahur Rizkiah

Institutions
Universitas Pendidikan Indonesia. Jl. Doctor Setiabudi, Isola, Bandung. 2019.

Abstract
This paper presents the software used to make patterns in fashion design. Writing design in the form of literature review, journals related to pattern making software are collected using search engines such as Elsevier, Sciencedirect, Google Scholar and Crossref. The purpose of this study is to collect and analyze articles related to making fashion patterns using software, expected to be able to 1) Facilitate the construction of patterns, 2) the development of teaching media, 3) the expansion of the pattern making system. Based on the articles collected, the results showed system of pattern making software facilitate for fashion industry to accelerate the process of fashion design until development of fashion patterns and reconstruction of human models introduced to rebuild the 3D human body in a computer system. A surface leveling algorithm was developed to convert 3D designed fabric pieces into 2D related patterns for production. Expected in the future rules governing style editing in the fashion design discipline can be incorporated into the system.

Keywords
Pattern Maker, Fashion Design, Software 3D and 2D

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/TBWChDbngN3r

Corresponding Author
Tb Ai Munandar

Institutions
a) Informatics Dept., Faculty of Information Technology, Universitas Serang Raya
*tbaimunandar[at]gmail.com
b) Computer Engineering, Faculty of Information Technology, Universitas Serang Raya

Abstract
The relationship of a symptom on a type of disease provides information on how strong the disease is affected by the symptom. The strength of the relationship of symptom has not been much researched, yet it is very interesting and important to do in order to strengthen the formation of final hypothesis, especially in the development of expert system. This research was conducted to map the relationship of a symptom on the type of heart disease, based on the echocardiography value and the result of electrocardiogram measurement. About 150 data of patients with heart disease were analyzed using the approach of pearson correlation coefficient. The research result showed that the type of disease such as atrial septal defect was much affected by the aorta symptom, the value of left atrium, the ESD, the PR [PQ], and the QRS. The type of coronary artery disease was much affected by the symptom of the values of EDD and ESD. Most of the symptoms did not have a strong relationship for the type of diastolic disfunction disease. For the type of rheumatic heart disease, about 62.86% symptoms had relationships, spread from the weak relationship, the moderate, the strong, the very strong, and even to the perfect relationship. The type of normal resting echocardiography disease had the relationship level of “no relationship” between the higher symptoms, compared to the rheumatic heart disease; and as well as the types of left ventricular hypertrophy disease and the hypertensive heart disease.

Keywords
heart disease, relationship of a symptom, expert systems, echocardiography, electrocardiogram, pearson correlation coefficient

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/EzRVuB9476dG

Corresponding Author
Ignatius Djoko Irianto

Institutions
Center for Nuclear Reactor Safety and Technology, Batan

Abstract
An Experimental Power Reactor called RDE (Reaktor Daya Eksperimental) is small size non-commercial power reactor with the thermal power of 10 MW is being designed based on high-temperature gas cooled reactor (HTGR). The purposes of the RDE designed is to generate electricity for supplying electricity in Serpong research area and to supply thermal energy for experimental purposes. The design of energy conversion system in the RDE design is designed in cogeneration configuration with a Rankine cycle. To meet the design goals, the configuration of the energy conversion system for RDE is designed in a cogeneration configuration with a Rankine cycle. The reactor coolant temperature at the outlet is designed at 700 oC, and the steam temperature at the outlet of the steam generator is designed at 530 oC. The analysis of RDE cogeneration energy conversion system performance is concentrated on two parameters namely the thermal efficiency parameter and the parameter that states the energy utilization factor (EUF). The aims of this research aims is to calculate and analyze the optimal of the two parameters in the design of RDE energy conversion system. The calculation of these parameters and analysis of the performance of RDE energy conversion system are performed by simulation using computer code ChemCad. The simulation results show that the energy utilization factor of the cogeneration configuration for the RDE energy conversion system can increase the energy utilization factor by more than 60%. From these results it can be concluded that the energy conversion system in the cogeneration configuration can increase the energy utilization factor and can save the reactor fuel.

Keywords
Performance, energy conversion system, RDE, thermal efficiency, energy utilization factor

Topic
Industrial Engineering

Link: https://ifory.id/abstract/yWLgE3mqaxRF

Corresponding Author
Siti Amatullah Karimah

Institutions
School of Computing, Telkom University. Informatics Engineering, Universitas Muhammadiyah Bandung

Abstract
The use of cloud computing as the infrastructure of a system is in high demand. Cloud computing has adapted to the use of a variety of applications that are very useful for organizations in reducing effort, cost, and time in making a system. And with container-based virtualization, the process of making and using the system will be easier. But in the cloud computing architecture, all services are located in the same system, when the system is down, all the services will be affected by the same. Therefore we need a solution to move services from one cloud system to another. And to speed up the process is to use the Container Orchrstration or architecture that has a structure that allows to move video streaming service to several containers with one controller. In this research, two types of architecture are compared, namely the architecture of container orchestration using kubernetes and simple container architecture using docker. The results show that container creating time in the container orchestration architecture is 30 times faster and 300% less in using resources on CPU Utilization when compared to simple container architecture.

Keywords
Virtualization, Container Orchestration, Kubernetes, Docker, Performance

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/wdhKNV8LfbZG

Corresponding Author
Fauzi Nurrahman

Institutions
a) Industrial Engineering, Telkom University Jalan Telekomunikasi 1, Bandung 40257, Indonesia
fauzinurrahman.student.telkomuniversity.ac.id
b)Industrial Engineering, Telkom University Jalan Telekomunikasi 1, Bandung 40257, Indonesia
franstatas[at]telkomuniversity.ac.id
c)Industrial Engineering, Telkom University Jalan Telekomunikasi 1, Bandung 40257, Indonesia
endangbudiasih[at]telkomuniversity.ac.id

Abstract
XYZ Company is manufacturing engaged in the rubber industry located in the city of Bandung because economic growth and demand from consumers in and outside the province are increasing, making companies demanded to meet the target orders promptly. One way to minimize losses and the possibilities that must be borne by the company is to increase Reliability, Availability, Maintainability of the production system itself and the safety value found in the company. Data in the form of Mean Downtime (MDT), Mean Time To Failure (MTTF), Mean Time To Repair (MTTR) is useful for system performance that works. MTTF data can be used to assess safety systems found in PT XYZ with the safety standards of IEC 61508 using Safety Integrity Level (SIL). From the results of processing RAMS data (Reliability, Availability, Maintainability, Safety Analysis) using Reliability Block Diagram modeling based on the analytical approach, for 120 hours, the system has a Reliability value (91.12%). The average value of system Maintainability at t = 2 hours is 100%. The Inherent Availability value is 99,981% and the Operational Availability value is 99,980%. Based on the world-class maintenance Key Performace Indicator, leading and lagging availability indicators have reached the indicator target standard. Safety Integrity Level values from calculations based on PFD and RRF values of each system are in SIL 1

Keywords
Reliability, Availability, Maintainability, Safety, Reliability Block Diagram, Safety Integrity Level, Key Performance Indicator

Topic
Industrial Engineering

Link: https://ifory.id/abstract/rkhWJ7u6cVXy

Corresponding Author
Andriyanto Setyawan

Institutions
Department of Refrigeration and Air Conditioning Engineering, Politeknik Negeri Bandung
Jalan Gegerkalong Hilir, Ciwaruga, Bandung 40012
*andriyanto[at]polban.ac.id

Abstract
An experiment on the effect of the relative humidity variations of outdoor air on the performance of an air conditioning system under constant dry-bulb temperature has been performed. In this experiment, the outdoor air temperature was maintained at 35°C while the relative humidity was varied from 40% to 70%. As a result, the operating conditions were slightly changed. In general, the suction temperature decreases with the increase of relative humidity. On the other hand, the condensing temperature slightly increases with the increase of relative humidity. Other findings for the experiment are almost constant of cooling capacity, with a variation of only 1.2%. An important evidence is that the condenser capacity increases by 15.2% for the relative humidity variation from 40% to 70%.

Keywords
relative humidity, cooling capacity, condenser capacity, energy efficiency ratio

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/wBzuR3EX69HN

Corresponding Author
Firmansyah Sulistiyono

Institutions
a) Technology and Vocational Education, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudi No.229, Isola, Kec. Sukasari, Kota Bandung, Jawa Barat 40154.
b). Postgraduate School, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudi No.229, Isola, Kec. Sukasari, Kota Bandung, Jawa Barat 40154.

Abstract
Lack of collaboration between vocational education institutions and industry causes a gap between the two (Khan, 2019). The open unemployment rate of SMK graduates is always the highest among graduates of other education levels (Indonesia, 2019). The real work that can be done to overcome these problems is to increase cooperation between SMK and Industry. Through the SMK revitalization program, Industry is asked to provide maximum access to students to carry out industrial work practices or internships (Inpres No. 9, 2016). This study aims to determine the development of technology at industry from the perspective of vocational-level interns student. The results of the study can be used as a reference for schools to prepare basic competency content that is tailored to the needs of the industry. The data was taken from all grade XI students of the Mechanical Engineering Department at the Mitra Industri Vocational High School with a sample of 46 students. The results showed as many as 76.1 percent of students carried out apprenticeship programs with a duration of 3-6 months, where the suitability of vocational competencies with the needs of the industry where the internship was in the category according to the percentage of 52.2 percent. Regarding the issue of the Industrial Revolution 4.0, as many as 30.4 percent of students have heard of the issue in the industries where they are apprenticed. On the other hand, the need to increase the content of Basic Competence in the engineering field in order to be able to prepare the teaching and learning process in accordance with the development and needs of the Industry.

Keywords
Internships, Vocational High Schools, Technology, Industry

Topic
Engineering Education Research

Link: https://ifory.id/abstract/6D8rhcMCtpUP

Corresponding Author
Gita Indah Gita Indah

Institutions
Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Ahmad Dahlan, Yogyakarta, 55191 Indonesia

Abstract
Potato may be used as a substitute to wheat which cannot be grown in the tropics. However, potato flour has characteristic physicochemical limitation compared with wheat flour. This study examined whether hydrogen-rich water can improve the physicochemical characteristic of potato flour as a substitute for wheat flour. We used a variation of soaking time in hydrogen-rich water (1,2,3,4 hours) and drying method (oven and UV). We found, physicochemical characteristic (water content, swelling power, and reducing sugars) better than wheat if soaked for 3 hours with UV drying method. So, modified potato flour using hydrogen-rich water can be considered as a substitute for wheat.

Keywords
wheat, swelling power, reducing sugars, soaking time, drying method

Topic
Chemical Engineering

Link: https://ifory.id/abstract/M7uyrAJhcNCm

Corresponding Author
Luthfi Nurwandi

Institutions
(a), (b), (c) Departement of Industrial Engineering Bandung Islamic University

(d) School of Technology Management and Logistics, Universiti Utara Malaysia

Abstract
The world is facing a fuel crisis because, the reserves of crude oil from fossils are depleting. This phenomenon inspires many parties to find alternatives to non-fossil materials, such as organic material to be converted into fuel. This research discusses of a potential pineapple peel which can produce methanol, as one alternative ingredient that can be processed into gasoline. The main phenomenon of study is determining the location of the establishment of a fuel processing industry, with the raw material of pineapple skin located in an area surrounded by pineapple plantations. Pineapple skin is a waste that has not been exploited, and only becomes organic waste that pollutes the environment. About two hundred thousand tons of pineapple peels per day are produced, so it is a potential raw material that can be converted into gasoline. The delivery of pineapple skins from seven industrial areas that produce pineapple peel needs to be determined, to maintain the logistics continuity that ensures the operation of the industry, pineapple skin processors become gasoline using Gravity Method. The factors observed in this research are distance, road condition, transportation and costs which its weight made by using Analytic Hierarchy Process (AHP), further from the weight was made determinant for the location of the pine apple peels processing industry to be gasoline. Processing results show that the position of the industrial waste processing of pineapple peels, highly determined by economic factors. This phenomenon shows that improving public welfare is more concerned, in seven plantations as well as the pineapple processing industry, compared to distance, transportation selection, as well as road conditions during the time of the pineapple skin waste processing industry was established.

Keywords
Pineapple, Peel, Determination, AHP, Gravity Method.

Topic
Industrial Engineering

Link: https://ifory.id/abstract/rhZp7URmxd9q

Corresponding Author
Agustinus Februadi

Institutions
Politeknik Negeri Bandung

Abstract
Introduction - Student evaluation of teaching (SET) provides feedback from students to faculty member for the teaching effectiveness improvements. Most of the SET instruments were designed from the knowledge and experience of a group of faculty members complemented with the review of past research. Studies on the process of developing a robust SET instrument that contextually fit with the institution needs are limited. Aim of the study - This study is intended to develop a SET instrument that applicable to Indonesian polytechnic teaching setting. Method – Data were collected from 755 students from various departments of Bandung State Polytechnic. The exploratory and confirmatory factor analysis were used to analyse the data. Results – The data analysis process identify 15 valid and reliable measurement questions grouped in three dimensions including preparation and organization, teaching practice, and exam and feedback. Conclusion and Implication – The new 15 questions SET instrument is applicable to Indonesian polytechnic teaching setting. This study extends our understanding on the process of developing a robust SET instrument specifically designed for Indonesian polytechnic teaching setting.

Keywords
Student valuation of teaching, Confirmatory factor analysis, Exploratory factor analysis, Polytechnic

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/LzjRkJ4KUZHM

Corresponding Author
Mila Karmila

Institutions
PRODI PENDIDIKAN TATA BUSANA DPKK FPTK UPI

Abstract
Fiber is a raw material used in the textile industry, based on the origin of the material there is fiber that comes from nature there is also derived from artificial fibers (synthetic). The needs of natural fibers such as cotton, hemp, flax, and other natural fibers still do not meet the needs of Indonesian textiles because these materials are goods that must be imported. Therefore, it is necessary to have a strategic effort in utilizing environmentally friendly alternative natural materials in Indonesia, one of which is lemongrass plants. Cereals (Cymbopogon nardus (L.) Rendle), physically have fiber. Currently the use of cereals is still limited to use for medicinal plants. Fragrant lemongrass can be effective as a medicine for headache, cough, stomach pain, diarrhea, body warmers, fever and mosquito repellent (Fauzi, 2009). Previous research by Rita and Ningtyas (2008) showed that ethanol extracts of leaf and stem of citronella can be used as plant-based pesticides to control Aedes aegypti mosquitoes and contain saponins, tannins, quinones and steroids. Basuki (2011) has also conducted research that the ethyl acetate extract of the citronella plant has been shown to have antibacterial activity against Escherichia coli and Staphylococcus aureus and it is also known that the ethyl acetate extract of the citronella plant contains flavonoids, polyphenols, saponins and essential oils. Based on various research results about the benefits and various benefits of cereals, awareness emerged to further research on the use of cereals as natural fiber material that can be processed into alternative textile materials, especially textile materials for home interior materials (apholstry) by raising the value of local wisdom and resources nature that has not been optimally processed. The potential of cereals has not been well assessed in Indonesia or the world. Through this research, it is expected that further developments will be made regarding the processing of textiles from lemongrass as an alternative fiber based on smart textiles.

Keywords
lemongrass, apholstry, smart textile

Topic
Material Engineering

Link: https://ifory.id/abstract/DzA9PbWpLxfE

Corresponding Author
Dwi Suhartanto

Institutions
a. Department of Business Administration, Politeknik Negeri Bandung, Indonesia.
b. Department of Leisure Management, National Ching-Yi Univerity f Technology, Taiwan
c. Faculty of Agribusiness and Commerce, Lincoln University, New Zealand

Abstract
Introduction The Indonesian tourism industry is currently flouring and competitive. In this competitive industry, the industry players- capability to predict their tourist behaviour is imperative. However, research to examine method of predicting tourist behaviour in this industry is limited. Aim of the study This study is designed to assess the applicability of SEM compared to Multiple Regression to predict tourist behaviour. Method This study uses a survey of 403 tourists from tourism attractions in Bandung. The model of tourist loyalty behaviour was assessed and compared using software AMOS (SEM) and SPSS (Multiple Regression). Result The results show that the model of tourist behaviour tested by using SEM has a sound Goodness of Fit Index. Further, the coefficient of determination of tourist behaviour in the SEM model is higher compared to that of multiple regression model. In addition, this study confirms the effect of experience quality on tourist behaviour. Conclusion This study reveals that applying SEM has offered a better prediction on tourist behaviour compared to Multiple Regression. This finding improves the theoretical and managerial understanding on the application of SEM in tourism industry.

Keywords
Structural equation modelling, Multiple regression, Tourism industry, Tourist behaviour

Topic
Industrial Engineering

Link: https://ifory.id/abstract/AgHWhvrRjT7d

Corresponding Author
Ramen Antonov Purba

Institutions
a,b,c) Department of Engineering, Technology and Vocational Education
Padang State University
Jl. Prof. Dr. Hamka Air Tawar Padang, West Sumatra, Indonesia

Email : samsirst111[at]gmail.com

Abstract
Unstable economic conditions require Bank must be careful in deciding towards lending customers. Banks should not take the risk of giving loans to customers who cannot afford to pay. This study aims to assist bank in predicting lending. The study was conducted at the Bank Perkreditan Rakyat in medan. The study was conducted applying data mining using the nearest neighbor algorithm. This algorithm was chosen because the nearest neighbor can calculate the closeness between new cases and old cases based on matching weights from a number of existing features. This algorithm will calculate the closeness with predetermined criteria. Hoped bank will be helped in making predictions.

Keywords
data mining, nearest neighbor, loan risk

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/jEqpkdDQKtMw

Corresponding Author
Lusianus Kusdibyo

Institutions
Politeknik Negeri Bandung

Abstract
An online train ticketing system has been introduced by Indonesian Train Company called KAI Access, despite some online platforms introduced earlier by private providers. While older generation may have difficulty in using the online platform, the millennial generation who mostly are university students is faster in mastering the platform, including the online ticketing system. The purpose of this study is to determine university students- perception of the Technology Acceptance Model (TAM) variable and measure the effect of the variable Perceived Ease of Use, Perceived Usefulness, and Attitude Towards Usage on Behavioral Intention. Questionnaires were distributed to university students who have using KAI Access train ticketing system. From 350 data collected, 335 data were valid for further analysis. Variance-based SEM PLS was used to determine the relationship between variables. The results show that Perceived Ease of Use and Perceived Usefulness have direct positive and significant effect on Behavioral Intention, while Attitude Towards Usage has no significant influence on Behavioral Intention. The implication for management is to provide better ticketing system which can create users- positive attitude to use it. Further research may compare among online ticketing service systems and involve other variables to predict consumers- attitude and behavioral intention.

Keywords
Perceived ease of use, perceived usefulness, attitude, behavioral intention, online train ticket systems

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/dMv2kPQBgxpN

Corresponding Author
Asep Barnas Simanjuntak

Institutions
1. Universitas Pendidikan Indonesia
2. Politeknik Negeri Bandung

Abstract
Abstract. Radiation pattern is an important parameter of the of the antenna performance. This parameter needs to be measured not only accurately but also as fast as possible. For this purpose, the automatic measurement system has been developed. In this research, the system is implemented to analyse the radiation characteristic of Yagi antenna by measuring its radiation pattern. The measurement result of the patterns is compared to those of computer simulation as well as table characteristics of Yagi antenna. For this purpose, a Yagi antenna is designed and realized as the radiation pattern measurement object. Then, the students conduct the experiment to measure and analyse the effect of parasitic elements to the radiation pattern performance of the antenna. The questionnaire is carried out as the method of the research and directed to the students of the Telecommunication Study Program, Bandung State Polytechnic.

Keywords
antenna radiation pattern, Yagi antenna, parasitic elements, antenna radiation pattern measurement

Topic
Engineering Education Research

Link: https://ifory.id/abstract/Ae4E9pDgPLK3

Corresponding Author
Lina Troskialina

Institutions
1) Dept. of Chemical Engineering, Politeknik Negeri Bandung, Bandung 40012, Indonesia
2) National Nuclear Agency of Indonesia, Jalan Tamansari No.71, Bandung 40132, Indonesia
3) Research Center for Chemistry, Indonesian Institute of Sciences, Serpong 15314, Indonesia

Abstract
Solid Oxide Fuel Cells (SOFCs) offer their ability to directly convert biogas into electricity via internal dry reforming. At POLBAN NiYSZ-based SOFC anodes were manufactured via aqueous tape casting. Raw materials such as NiO and yttria stabilised ZrO2 powders, glycerol, polyvinyl alcohol (PVA) and water were weighed and mixed. The obtained slurry was ball milled, de-gassed, tape-cast, and dried. The good green tapes were then sintered at 1200˚C. The sintered tapes were characterized for the electrical conductivity at 600-800oC, morphology and composition using SEM/EDX, and hardness using Vickers hardness tester. The resulted morphology and composition of the anode tapes were comparable with those of the reference anode tape, with pore sizes ranging from 100ɳm-1μm and 28% porosity (pore volume). The tapes- hardness after sintering were in the range of 170,3 HV and 212.2 HV. Under reduced condition, their conductivities were 0.0981 Siemens and 0.5291 Siemens at 750oC and 800oC respectively. The successful attempts to make NiYSZ-based SOFC anodes using locally available materials and equipment are promising as the initial steps for further development of SOFC manufacturing in Indonesia. The next steps to do in this work are to evaluate the catalytic activities of the anode towards dry reforming, then to build the full SOFCs and to test their electrochemical performance.

Keywords
solid oxide fuel cells; Ni-YSZ anodes; aqueous tape casting

Topic
Chemical Engineering

Link: https://ifory.id/abstract/nfMd29mUWReT

Corresponding Author
Khaerunnisa Nurbani

Institutions
Vocational and Technology Education Study Program of Post Graduates Schools, Universitas Pendidikan Indonesia (UPI), JL. Dr. Setiabudi No. 229, Isola, Kec. Sukasari, Kota Bandung, Jawa Barat 40154, Indonesia
*khaerunnisa.nurbani[at]upi.edu

Abstract
In an effort to reduce the risk of earthquake in the Lembang fault area, it is necessary to understand the level of preparedness in the face of earthquake disasters, particularly those in the disaster hazard areas. This study aims to determine the perceptions of the secondary school against the dangers of earthquake, also what preparations have been made by the school such as socialization and simulation for readiness in case of an earthquake, prepare a place for meeting points, including preparation for the resilience of school buildings in the face of earthquake disasters in the Lembang fault area. The results of this study indicate that the responses obtained from interviews at the Vocational High School (SMK) 45 Lembang and Lembang Agricultural Vocational High School, identified that most of them already knew that in their own school there was a Lembang fault line and the school already knows and aware the dangers of future earthquakes. However, there are obstacles in the construction of schools that are in accordance with earthquake resistant standards, which is one of the lack of preparedness in the face of earthquake disasters.

Keywords
Preparedness; Earthquake; Lembang fault

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/MtQ4fYFxzA2b

Corresponding Author
Dhyna Analyes Trirahayu

Institutions
(a) Chemical Engineering Department, Politeknik Negeri Bandung, Bandung, Indonesia 40559
*dhyna.analyes[at]polban.ac.id

Abstract
Glycerol is widely use in the production of cosmetics, solvents for drugs, and lubricants. Glycerol can be obtained as by-product of biodiesel production from vegetable oils through the transesterification process. One of the vegetable oils with abundant raw material availability in Indonesia is corn oil. Each vegetable oil generally consists of triglycerides and free fatty acids (FFA) with different composition. The triglycerides in corn oil is round 95.59% (mostly trilinoleate and triolein), the rest are FFA (2.51%), phospholipid and phytosterol. The simulation process was designed using Aspen Hysys version 8.8. The corn oil composition was simulated as 54.30% trilinoleate, 41.35% triolein, and 3.85% oleic acid (FFA). The mole ratio of corn oil : methanol was set to 1 : 20. The transesterification process was simulated using conversion reactor with conversion 98% at temperature 60C and atmospheric. The process was followed with methanol recovery and glycerol separation from biodiesel. From the process around 84.5% of excessed methanol was recovered. Glycerol and biodiesel were separated using membrane. The simulation indicates that 100 kg/h corn oil can converted into 101.1 kg/h green diesel and 10.41 kg/h glycerol with purity 99.85%.

Keywords
corn oil, glycerol, process simulation, transesterification

Topic
Chemical Engineering

Link: https://ifory.id/abstract/ZbV8qUfQAekC

Corresponding Author
Rosita Meitha Surjani

Institutions
University of Surabaya & Sepuluh Nopember Institute of Technology

Abstract
In recent years, the basis of customer value has moved from physical product offering to product-service system (PSS). PSS is an integrated bundle of physical products and services which aims at creating customer utility and generating value. Previous studies have proposed several methods for PSS design, but there was little attention given to PSS design considering multi-actor. The PSS provider (manufacturer and service provider) and customer usually have different needs. Therefore, PSS should be designed by incorporating the PSS multi-actors. This research proposes a new model of Multi-actor Fuzzy-Quality Function Deployment for designing of PSS with multi-actor. This model is proposed to collect responses from customer, manufacturer and service provider in designing PSS so as to ensure satisfaction of all parties and conflict of interests could be compromised. In order to support the applicability of the PSS model development, new software is developed. This new methodology has been implemented in a furniture manufacturer in Surabaya, Indonesia.

Keywords
Product-Service System, PSS design, multi-actor

Topic
Industrial Engineering

Link: https://ifory.id/abstract/yuAE7LaYWKcd

Corresponding Author
Dian Suminar

Institutions
Department of Chemical Engineering, Politeknik Negeri Bandung, Indonesia

Abstract
Accumulation Oil Palm Empty Bunches (TKKS) cause environmental problems if not solved. TKKS has a high cellulose composition, so it can be used as nanocellulose which has a high use value. The process of making nanocellulose from TKKS through the isolation stage of α-cellulose with a delignification process using Sodium Hydroxide (NaOH) 17.5% (b / v) at 80oC, bleaching using Hydrogen Peroxide (H2O2) 10% (v / v), hydrolysis using sulfuric acid and drying using freeze drying at a heating temperature of 53oC for 7 hours. Cellulose yield produced from the isolation process of α-cellulose from TKKS was 20.8%. The results of this drying process will reduce the aggregation of particles in the nanocellulose produced, so that nanocellulose is produced at 160-298 nm

Keywords
nanocellulose, hydrolysis, freeze drying.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/BT3FwEzDbeaL

Corresponding Author
Kautsar Munazz Firdaus

Institutions
Mechanical Engineering Education Department FPTK UPI

Abstract
ABSTRACT Cattle raising is inseparable from the continuous supply and preparation of food. To increase livestock productivity, one important factor that must be considered is the supply of forage both in quality and quantity. The purpose of designing a crusher machine of elephant grass as cattle feed is 1) being able to determine the design of the machine precisely, 2) being able to determine the design of the right cutting knife, 3) being able to determine the engine transmission system circuit, 4) being able to determine the required motor drive power machines, 5) being able to build machines in accordance with the plans that have been made, and 6) determine the effectiveness of the machine with the results of cattle feed production. This machine design step begins with field observations to the “RT.02” cattle breeder group in the Cilumber Village at Tangkuban Parahu street, Lembang, West Bandung to analyze the situation of partners, analyze problems owned by partners and develop data collection techniques through book references and journals related to the topic of discussion and then become solutions to partner problems. The next step is the preparation of working drawings, manufacturing and testing tools with the results of the design of this cattle feed crusher machine is 1) the technique of cutting this machine with 4 blades that cut the grass continuously, 2) the transmission system of this engine changes the rotation of the power motor from 2400 rpm to 800 rpm, with components in the form of 2 pulleys of 2 inch and 6 inch diameter connected by v-belts type A no. 41, 3) the design of this engine requires 2.5 kW of power motor and 6) the results of the performance test show that the engine is working quite well, producing grass cutters of 1-7 cm in size with a cutting capacity of 200 kg / hour.

Keywords
elephant grass, crusher machine, capacity, production.

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/FWQzKAfEU8qh

Corresponding Author
Amelia Kurniawati

Institutions
Department of Industrial Engineering, Telkom University
Jl. Telekomunikasi No. 1, Bandung 40257, Indonesia
*ameliakurniawati[at]telkomuniversity.ac.id

Abstract
Nowadays, various specific skills are needed in the global work environment. Because of that, many university majors provide specializations within majors. The industrial engineering major in Telkom University has eleven specializations which can be selected by the fourth-year students. The class maximum capacity for each specialization is 45 students. Every academic year, there are some specializations that have registrants more that the class maximum capacity. Therefore, the aim of this study is to create a selection procedure. The methodology used in the selection procedure is profile matching. The matching is done between the students- capacity and the requirements of the specializations. The capacity and the requirements are measured by using seven previous first to third year courses as the criteria. The value of the criteria is measured by the grade index of the seven courses. The gap is identified between the students- grade achievement and the highest grade. This study is limited to two specializations that have 55 and 47 registrants in academic year of 2019/2020. The profile matching calculation is simulated using the data of three students for each specializations. The highest and the lowest match score from the six students are 4.9 and 3.6 (in scale of 5).

Keywords
Profile matching; Selection procedure; University students

Topic
Engineering Education Research

Link: https://ifory.id/abstract/BxcVUEpRGfzT

Corresponding Author
Endang Susilaningsih

Institutions
Universitas Negeri Semarang

Abstract
The misconception is a mistake in building conceptions based on accepted theory. Undetected misconceptions can prevent students from understanding concepts at the next level. This study aimed to determine the profile of misconceptions experienced by the participants did at level particulate on acid-base material. Students misconceptions are detected by using the three-tier multiple-choice test and interview questions. This type of research is quantitative descriptive with the subjects trying 230 students of science class grade 2. The study was conducted at SMA Pangudi Luhur Don Bosko Semarang, SMA Negeri 1 Ungaran, and SMA Negeri 2 Demak. The results showed the general misconception in the acid-base material is 40% in SMA Negeri 1 Ungaran, 43% in SMA Negeri 2 Demak, and 43% in SMA Pangudi Luhur Don Bosko Semarang. Positive misconceptions in SMA Negeri 1 Ungaran, SMA Negeri 2 Demak, and SMA Pangudi Luhur Don Bosko Semarang are respectively 10%, 8%, and 12%. Negative misconceptions in SMA Negeri 1 Ungaran, SMA Negeri 2 Demak, and SMA Pangudi Luhur Don Bosko Semarang are respectively 9%, 2%, and 6%. High-level misconceptions in SMA Negeri 1 Ungaran, SMA Negeri 2 Demak, and SMA Pangudi Luhur Don Bosko Semarang are respectively 24%, 30%, and 25%. The misconception profile of students at the particulate level in Acid-base learning in SMA Negeri 1 Ungaran, SMA Negeri 2 Demak, and SMA Pangudi Luhur Don Bosko Semarang were 39%, 48%, and 56% respectively. Based on the results of the analysis of research data it can be concluded that there are misconceptions about acid-base strength, the concept of pH, and the calculation of pH. This is because the item uses levels of evaluation and analysis at the particulate level.

Keywords
acid base; misconception; particulates ; three tier multiple choice test

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/qkMnAWfwda7V

Corresponding Author
Trias Megayanti

Institutions
Departemen Pendidikan Teknik Arsitektur - Universitas Pendidikan Indonesia

Abstract
A shift in-demand skills in the workforce at the cognitive level and the need to adapt is a challenge for vocational graduates. Therefore a strategy is needed to enhance the 21st-century skills in vocational education. One of the strategies is implementing an active learning model such as Project-Based Learning. This article aim is to gather, summarize and integrate the quality of empirical evidence supporting links between Project-based Learning (PBL) and 21st-century competency framework. This study conducted with a systematic literature review. The data was collected from textbooks, journal articles, and internet searches. The result shows there are a lot of evidence of project Based Learning positive impact in fostering students skill in accordance to 21st-century competency framework including critical thinking, problem-solving, communication ability, collaboration ability, and creativity. The result also shows that several factors that could limit the effectiveness of PBL implementation including the teacher-s role, students- roles, and other factors including equipment and the environment.

Keywords
Project-based learning, Vocational education, 21st-century skills,

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/JkNyxTpVuZWj

Corresponding Author
Fachmy Sugih Pradifta

Institutions
Universitas Islam Bandung

Abstract
The Age of Globalization has led to uniformity on the image of the city. The ubiquitous “modern” glass and steel building with air conditioning has dissociated the local climate and cultural context. Kenneth Frampton, with his postulate of Critical Regionalism, saw this phenomenon as the destruction of the creative nucleus of a great civilization and great culture. Postcolonial countries, like Indonesia which inherit colonial cities, facing issues to define their identity, namely in terms of performing Tropical Architecture principles and how to enforce it institutionally. The architectural design of the private building has been seen as a private domain that cannot be regulated, thus the owner needs to present themselves through their building as a "modern and progressive" company cannot be restricted. This paper tries to examine how urban planning can help to actualize modern tropical city images by implement supporting regulations. A qualitative approach with stakeholder analysis is conducted to seek the opportunity to implement design control by a municipal government that met with the building owner-s interest. A case study of Landscaping for Urban Spaces and High-Rises (LUSH) Programme from Singapore-s Urban Redevelopment Authority (URA) also studied to learn the success story. The result is that a design control, to achieve a more contextual approach in architecture design practice, could be performed in the building permit application process by zoning regulations technique with incentive and bonus schemes.

Keywords
Tropical architecture, critical regionalism, urban design control, zoning regulation

Topic
Architecture

Link: https://ifory.id/abstract/bY4xEe9LHGCP

Corresponding Author
Astri Mutia Ekasari

Institutions
(a,b,d) Department of Urban and Regional Planning, Faculty of Engineering, Universitas Islam Bandung, Jalan Tamansari No.1 Bandung 40116, Indonesia
* astri.mutia[at]unisba.ac.id

(c) Department of Business Administration, Faculty of Social Science and Political Science, Universitas Pasundan, Jalan Tamansari No.6-8 Bandung 40116, Indonesia

Abstract
The tourism sector is currently a mainstay activity to increase state revenue. Competition between tourist destinations is increasingly stringent, both at regional and even international levels. Bekasi Regency is one area that continues to increase its regional income from the tourism sector, reinforced by the vision of tourism development that emphasizes the realization of regional tourism that can maintain environmental sustainability. In this condition, tourism promotion and marketing strategies are highly needed to advance environment-based tourism destinations that can compete globally by utilizing local identity, authenticity, and uniqueness. Data was obtained through a questionnaire that included 20 questions about respondents perceptions and demographics. The results of the study led to a proposed strategy that highlights the need to improve the provision of amenities and expand promotion by strengthening ancillary. This promotion and marketing strategy can be an instrument for stakeholders involved in tourism and help achieve sustainable development that is environmentally friendly throughout the value chain of the tourism sector.

Keywords
Promotion, Environment-based Tourism, Sustainability

Topic
Environmental Engineering

Link: https://ifory.id/abstract/vhAcBQuyjkrR

Corresponding Author
Muhammad Humam Haekal

Institutions
a) Industrial Engineering, Telkom University Jalan Telekomunikasi No.1, Bandung 40257, Indonesia
b)Industrial Engineering, Telkom University Jalan Telekomunikasi No.1, Bandung 40257, Indonesia

Abstract
PT XYZ is an Indonesian industrial company in the city of Bandung that produces rodhing using frizz drilling machines. Frizz drilling machines are machines that produce all the main parts contained in rodhing namely pitchfork control, pitchfork moving, moving rod, control rod, F control and F moving, must have good performance and work optimally. So the maintenance policy on rodhing machines must be right. The method used by Total Productive Maintenance (TPM) on the frizz drilling machine to find out which maintenance system is implemented is good. The next method is Overall Equipment Effectiveness (OEE) Analysis to determine engine performance and engine effectiveness. In OEE calculation is carried out to determine the availability value, performance rate, and rate of quality of a machine, and the six big losses factor to find out what factors cause low OEE values. The frizz drilling machine is obtained. Value of overall equipment effectiveness of drilling machine frizz, namely, availability 87, performance rate 77%, and quality rate 95%. So that the OEE value is 63%, while the biggest value of six big losses is equipment failure losses and idling minor and stoppages losses with a value of 36%. After obtaining the OEE and six big losses, an analysis of the 4 pillars of total productive maintenance (TPM) was carried out, namely autonomous maintenance, quality maintenance, education and training and planned maintenance. From the analysis of the 4 pillars of the TPM, there were proposals in the form of creating a new maintenance division job desk, damage recording sheets and controlling preventive maintenance sheets

Keywords
Overall Equipment Effectiveness;Availibility;Performance Rate;Rate of Quality;Six-big-losses;Total Productive Maintenance

Topic
Industrial Engineering

Link: https://ifory.id/abstract/JrXgGL4CnYfV