Indonesia Conference Directory

Corresponding Author
Danindra Rizky Lazuardy

Institutions
1,2,5 Informatics Dept., Faculty of Information Technology, Universitas Serang Raya,
3,4 Information Systems Dept., Faculty of Information Technology, Universitas Serang Raya

Abstract
The development of the internet in Indonesia is very rapid, this is marked by the number of emerging social media. One of the most popular social media is Twitter. Many Twitter users who tweet their expression and opinion on a product, service, political issues or things that are trending. Even the current government is not spared from public comment on social media, one of which is an honorary teacher at an elementary school in Pandeglang Regency, who lives next to his school toilet. This case was widely discussed by almost all Indonesians through offline and online media, especially on social media. The impact of this case is the difference in response in the form of public sentiment towards public services, especially in improving the welfare of educators. Various sentiments of Netizens (internet users) appear on social media ranging from praise, criticism, suggestions, satire and even expressions of hatred towards the Pandeglang Government. This research was conducted to determine netizens sentiments towards the Pandeglang Regency government based on the case of honorary teacher news in Pandeglang Regency who live in school toilets. The approach used is Naive Bayes. The results of sentiment analysis showed that there are 16 Twitter posts grouped in neutral class, 19 posts in positive class and the remaining 16 posts are in the negative class. The level of accuracy generated from the sentiment analysis model formed is 88.24%.

Keywords
sentiment analysis, Naive Bayes, public opinion, public services, social media

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/vPYkUDq4Wrn8

Corresponding Author
Johan Reimon Batmetan

Institutions
a) Information Technology and Communication Education, Universitas Negeri Manado, Tondano 95618, Indonesia
*john.reimon[at]unima.ac.id
b) Information Technology and Communication Education, Universitas Negeri Manado, Tondano 95618, Indonesia
c) Information Technology and Communication Education, Universitas Negeri Manado, Tondano 95618, Indonesia
d) Information Engineering, Universitas Negeri Manado, Tondano 95618, Indonesia

Abstract
Academic information systems are very important in the management of academic services in a modern university. Academic information systems help academic system services quickly, efficiently and accurately. The purpose of this study is to implement the ITIL framework domain service operation in the academic information system so that its services become efficient, accurate and standardized. This study uses the ITIL framework method which is implemented in academic information systems. The implementation is used specifically in the domain service operation, which was built using the best practices available in the ITIL framework. The results of this study solve the processes of change and testing of IT services that are more effective and efficient in operating academic information systems. The results of this study also show that academic information systems have strong knowledge that can be used to deal with change and present strong services and appropriate procedures for dealing with change. This ITIL Framework produces quality and standardized academic information system services according to ITIL standards. The results of the study concluded that the academic information system operating services that implement the ITIL framework domain service operation have standardized services and clear guidelines for running website-based academic applications. The results of this study are important to strengthen the academic information system so that it becomes effective and optimal in carrying out the functions of academic services.

Keywords
ITIL framework, academic information system, operating services, best practice

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/ewKYx2atLrFR

Corresponding Author
Novi Gusti Pahiyanti

Institutions
(a) Departement Electrical Engineering, PLN Technical College
Jalan Lingkar Luar Barat Duri Kosambi, Cengkareng, Jakarta barat 11750
novi.gusti[at]sttpln.ac.id
(b) Departement Electrical Engineering, PLN Technical College
Jalan Lingkar LUar Barat Duri Kosambi, Cengkareng, Jakarta Barat 11730

Abstract
Short term electricity load forecasting is a very important factor in the planning and operation of an electric power system. The purpose of electricity load forecasting is that electricity demand and supply can be balanced. The pattern of consumption of different electrical loads at certain intervals at the Harapan Indah Gas Insulated Switchgear (GIS) substation. Making the problem of variations in the electricity load is not homogeneous. Lots of methods are used to produce accurate and precise electrical load forecasting. With the hope that the current load will be distributed precisely and according to the needs of consumers. In this study discusses the short-term electricity load forecasting by the Linear Regression method and the Energy Coefficient where, the two methods are compared to find the value of the percentage of small errors and very good accuracy. Calculations in this study use historical data on electricity loads at PT PLN (Persero) Jakarta Raya Main Distribution Unit in March 2019 on GIS Harapan Indah. The results showed that the average error ratio from Monday to Sunday was 7.92% with an accuracy value of 92.08% for Linear Regression and 10.46% with an accuracy value of 89.54% for the Energy Coefficient

Keywords
Short-term forecasting, linear regression, energy coefficient percentage error

Topic
Electrical Engineering

Link: https://ifory.id/abstract/Gd43uNcET6hf

Corresponding Author
Ariawan Rachmanto

Institutions
Fakultas Ilmu Komputer dan Informatika – Universitas Nurtanio Bandung

Abstract
VOR / DME is an air navigation equipment, in flight navigation equipment is needed by the pilot as the direction to fly to the destination airport. The pilot tune the destination VOR / DME frequency, the HSI (Horizontal Situation Indicator) instrument on the aircraft will display the heading, bearing, deviation and course data, taking into account these data the pilot will arrive at the destination airport. The research objective is to make aircraft simulation software pass VOR / DME. The software is developed using the prototype method, which is by making a display model first, then comparing the display models that have been made with the existing VOR / DME simulation device. Simulation and modeling are developed by placing VOR / DME at the appropriate latitude and longitude, map modeling using MapX4.5, the plane is conditioned by selecting at a predetermined point, the HSI instrument is modeled using GL Studio, the programming language used is C

Keywords
heading, deviation, bearing, range

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/7z4N6rABL3TC

Corresponding Author
Ambar Winansi

Institutions
a) Environmental Engineering Study Program, Civil Engineering Department, University of Indonesia, Depok – Indonesia
* Corresponding author: ssarwamto[at]eng.ui.ac.id

Abstract
Under normal operating conditions nuclear facilities have potential release of radioactive substances into water bodies. Radionuclide release to the environment is very complex that it needs to be simplified with a mathematical model approach using Surface Water Modeling Systems (SMS 10.1) that resolves hydrodynamic differential equations by finite element method. In river, pollutant dispersion is strongly influenced by the process of advection and diffusion, where the advection process becomes more dominant. The goal of this research is to model the dispersion of 60Co radionuclides in Cisalak River located around Serpong Nuclear Area. In this research, the simulation is done by the hydrodynamic model simulation using Resources Management Associates (RMA2) module to model the flow and continued using RMA4 to model the dispersion of pollutants. In addition, this research uses discharge values variations for the dry and rainy seasons. The 60Co concentration at the release source is the highest, lowest, and average value in the last three years. The results shown that the dispersion pattern of 60Co concentration along Cisalak River is a function of distance and time. In addition, the concentration of pollutants is strongly influenced by river characteristics and also discharge of the river and effluent.

Keywords
60Co radionuclide, dispersion model, Serpong Nuclear Area

Topic
Environmental Engineering

Link: https://ifory.id/abstract/NgGXyuK2bchw

Corresponding Author
I Made Wiwit Kastawan

Institutions
Department of Energy Conversion Engineering, Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Bandung Barat, Jawa Barat, Indonesia
E-mail: wiwit.kastawan[at]polban.ac.id, erwin.yusuf[at]gmail.com, afiffadhilah.erg[at]gmail.com

Abstract
This paper presents a detailed description about design of phase shifting transformer to reduce source current harmonic generated by variable speed drive (VSD) units commonly used for controlling speed of hot air blower motors of a stenter machine in textile industry. Nine units of VSD are used in a stenter machine of a selected textile industry that generates source current with relatively high harmonic content. Total harmonic distortion (THD) figure of the source current varies from 43.91% to 50.34%. The source current contains all odd order harmonics except triplen ones. A method proposed to reduce this source current harmonic is by using phase shifting transformer. Two different phase shifting transformer arrangements are possible. The first one is arrangement of three phase shifting transformers. The other one is arrangement of nine phase shifting transformers. Arrangement of three phase shifting transformers uses Yy, Yz1 and Yz2 three-phase winding connection to produce phase shifting of 0, 20 and –20 respectively. Meanwhile, arrangement of nine phase shifting transformers uses one Yy three-phase winding connection with 0 phase shifting, four Yz1 three-phase winding connections with 6.67, 13.34, 20 and 26.67 phase shifting respectively and four Yz2 three-phase winding connections with –6.67, –13.34, –20 and –26.67 phase shifting respectively. Results from simulation using MATHLAB SIMULINK show that harmonic content of the source current reduced significantly. THDs of the source current drop to 1.99% and 1.74% respectively when arrangements of three phase shifting transformers and nine phase shifting transformers are used.

Keywords
current harmonic, phase shifting, three-phase transformer, THD, VSD.

Topic
Electrical Engineering

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

Corresponding Author
Sofy Fitriani

Institutions
a) Department of Computer Engineering and Informatics, Politeknik Negeri Bandung, Gegerkalong Hilir, Bandung, Indonesia
b) Department of Electrical Engineering, Politeknik Negeri Bandung, Gegerkalong Hilir, Bandung, Indonesia

Abstract
Recently, many industries are using Supervisory Control and Data Acquisition (SCADA), especially in the electrical industry. SCADA system is a computer based in control and monitoring system. This research is proposed to design a Human Machine Interface (HMI) on the SCADA system for power plant. However, due to the high cost of HMI as used in the industry, a simulator HMI was built. The objective of this study is to design HMI simulator by using Visual Basic to simulate controlling process as similar as in the real plant. The strategy to examine the performance of HMI simulator is manipulates data from analogue data contained in a three-phase plant simulator and converted into the real SCADA scale and displayed. Based on the experiment, the performance of HMI simulator is following what it should be, where the entered data from the RTU to the HMI is running well and can displayed on a computer.

Keywords
HMI, Simulator, SCADA, Visual Basic

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/FPLjvEAcDt3K

Corresponding Author
Sahal Abdil Kadir

Institutions
Masters in Civil Engineering, Faculty of Civil Engineering, Syiah Kuala University
Jl. Sheikh Abdurauf No. 7, Kota Banda Aceh 23116, Indonesia
Tel: +62 811 6810 991 E-mail: sahal.abdil.kadir[at]gmail.com

Abstract
Aceh Besar is one of the areas prone to flash floods and landslides. On January 2, 2013 there was a flood and landslide at Tebing Krueng Teungku in Seulimum District. The collapse of a slope can be caused by an increase in the shear stress of the soil mass or a decrease in the shear strength of the soil mass to withstand the forces that are mobilized due to the soil mass and the presence of external loads. Based on these problems, we need an analysis that can provide solutions to slope problems by repairing or strengthening. Calculations were performed using the Geo Slope/W Program and Simplified Bishop Method on the Krueng Teungku cliff at Points A-01, B-02, and C-03. In the calculation phase of the Geo Slope/W Program, the Safety Factor (SF) values are 1,087, 1,041 and 1,158. In the calculation using the Simplified Bishop Method the SF are obtained namely 1.033, 1.017, and 1.106 where these values do not meet the safety factor requirements of SF>1.25. Therefore it is necessary to make efforts to strengthen the slope to avoid landslides such as installing gabions or retaining walls in accordance with the conditions on the ground.

Keywords
Slope Stability, Safety Factor, Geo Slope/W, Simplified Bishop Method

Topic
Civil Engineering

Link: https://ifory.id/abstract/ayRJdW6tTnFr

Corresponding Author
Parabelem Tinno Dolf Rompas

Institutions
a) Informatics Engineering Study Program, Universitas Negeri Manado
Jalan Kampus Fakultas Teknik Unima, Tondano 95618, North Sulawesi, Indonesia
*parabelemrompas[at]unima.ac.id
b) Study Program of Technical and Vocational Education, Graduate School, Universitas Negeri Yogyakarta
Jalan Kampus Karangmalang, Yogyakarta 55281, Indonesia
c) Department of Information and Communication Technology, Universitas Negeri Manado
Jalan Kampus Fakultas Teknik Unima, Tondano 95618, North Sulawesi, Indonesia

Abstract
The role of technology is getting stronger involved in educational practices. The future development of this role is considered to facilitate heavy work and higher thinking can be simplified. However, these conditions must be realized by the teacher so as not to shift and be able to control the role of technology. Some of the roles of technology include the involvement of IoT in the education sector, namely the administration system and the teaching system with the concept of cohesiveness between teachers, students and technology integration. Thus, social and emotional learning (SEL) requires learners to be able to understand and manage emotions to set and achieve positive goals, build and maintain positive relationships and make responsible decisions. This review study aims to describe SEL competencies in future work towards (a) self-awareness; (b) self-management; (c) social awareness; (d) relationship skills; and (e) responsible decision making. The research method uses literature review with big data from various online databases. The teacher will be able to organize learning well by considering the achievement of SEL competencies. Finally, some suggestions were proposed for future research, technological involvement in the field of vocational work.

Keywords
Future skills; Social and emotional learning; Systematic mapping study; Technology integration

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/kUhRfqwe7bn2

Corresponding Author
Anis zakaria

Institutions
UNIVERSITI PUTRA MALAYSIA

Abstract
Gallery Walk learning and site visit is learning methods that fell under the social constructivism theory of learning that can promote learning towards industrial revolution 4.0. These learning strategies allow students to understand better about the subject or a learning topic that connects them with vast data and industries. This learning strategy creates opportunities for students to share information, views, and ideas with peers and industries. Gallery Walk cooperative is a learning model that can stimulate and strengthen students memory in the learning process because what students learn is seen and analyzed directly, not only seen through images. This study is about the application of Gallery Walk teaching methods that are modified according to the suitability needs of the learning objectives. On subjects related to law and act, students need to understand and evaluate the effects and consequences if they fail to be complied with. The details of the Act need to be memorized and understood in the context of the Hair Care and Hairdressing subject very important in ensuring the right of consumers, salon premises, workers rights and guidelines to work well. The students have visited the saloon in their group to interview the saloon owner related to legislative and act in salon management. During the gallery walk activity, the students were divided into two big groups and every group then divided again into five groups according to the division of law and act in salon management. Modified Walk Gallery strategy was used to ensure all the students involved in the presentation and discussion. A few strategies were used such as smaller group members, an active presentation by group members, Q and A session and assessment session among the other groups members and pre-discussion. From the observations, the student presenters played a good role and they managed to convey the information by giving example to each division on the acts they were presented and managed to create a good climate in discussing and conveying the knowledge related to the real situation in saloon. Besides that, the audiences were also felt confident to throw questions to the presenter until they understand the descriptions of the acts. From the qualitative data, 93.7% of the students were able to answer the examination very well and 89.8% of them could give the correct reality example according to the acts questioned. Related to the finding, the combination of saloon visits and modified gallery walk should be applied to other subjects related to law and act. It needs a good plan teaching method and systematic process to ensure the students capture the real understanding of the saloon law and acts.

Keywords
Theory of social constructivism, Industrial revolution 4.0, Cosmetology Education, gallery walk, sal

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/fNvTj4d6xrka

Corresponding Author
Lina Setiawati

Institutions
Politeknik Negeri Bandung

Abstract
Consumers lifestyle has been greatly shifted due to the massive development of social media and brought unprecedented opportunities and challenges for marketing activities. There are few steps leading to consumer in deciding the product that they want to buy. This study helps to explain determinants and consequences of social media marketing in Instagram context and its relationship with purchase intention. To this end, an empirical study applying partial least square (PLS) were conducted. Utilising 254 of sample size, the results reveal that community building is crucial determinants of social media marketing in online culinary information search which later affects purchase intention. Further, this study clarifies creating brand identity in Instagram is a way to build a brand image. This research has a potential impact to provide renewed insights for researchers into determinants and consequences of individual purchase intention.

Keywords
Social media marketing, Instagram, Purchase intention, Culinary, SME

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/R6QwVKnLtbE4

Corresponding Author
Vina Dwiyanti

Institutions
a) Faculty of Vocational and Technical Education, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No.229, Banding-Indonesia
ana[at]upi.edu
elisendang[at]upi.edu
b) Vocational and Technical Education Study Program, Postgraduate School, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No.229, Banding-Indonesia
vinadwiyanti[at]upi.edu

Abstract
Working in the tourism industry is tied by excellent service that demands the worker to work with high performance. The workers are required to fulfill the skills in order to survive in 4.0 industrial era, namely social skills. This study employs literature review to examine the importance of cooperation competences such as social skills in tourism industry. This study indicates that cooperation competence in the form of collaboration with other people and groups is the core competence that the students must possess to prepare themselves to work. Through cooperation competence, the workers are able to reach the goals of their job quickly, precisely, effectively, and efficiently. The cooperation competency will advance learners to compete and win the competition between human and robot in 4.0 industrial era.

Keywords
Social Skills, Cooperation Competence, Tourism

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/BzCh8AMQtjWn

Corresponding Author
Feren Dila Aviska

Institutions
Agroindustry Technology Study Program,
Faculty of Technology and Vocational Education, Universitas Pendidikan Indonesia

Abstract
SMK graduates are required to master the competency of specific expertise and entrepreneurship programs both to meet the demands as a workforce, and to attend higher education in accordance with their vocational skill. The demands as a workforce, and the requirements for higher education will prioritize graduates who have good soft skills. Soft skills can be developed through learning activities in the classroom and cannot be separated from the role of a teacher, it takes a learning model that builds knowledge and improves these abilities. The project-based learning model is a learning model based on constructivism that supports student involvement in problem solving situations by working on a project. The purpose of this study is to determine students abilities in solving problems, managing information, leadership skills, team work, and communication. Respondents in this study were class XI-K APHP Tanjungsari Vocational School 2018/2019 with a total of 31 people. The type of this research is classroom action research (CAR) which consists of 3 cycles which carried out in four stages of each cycle. Data collection in this study was carried out through observation and questionnaires. The results of observations and student questionnaires were 79.35% and 72.87% respectively and categorized as good

Keywords
PJBL, Teamwork

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/F6uyMgCPLHKx

Corresponding Author
Bambang Hari Kusumo

Institutions
University of Mataram and IPB University

Abstract
Soil organic matter (SOM) has a very vital role in determining soil fertility status and land productivity. The amount of SOM in the soil varies greatly depending on land use and land management. This study aims to describe the SOMs status in various land uses and management, and to test the accuracy of near infrared (NIR) technology in measuring the SOM. A total of 100 soil samples (0-10 cm depth) were collected from various land uses and management (rain-fed land, irrigated land, land planted 1-3 times with annual crops, land planted with 1-3 perennial plants) in Kayangan Sub-District, North Lombok. The dried, ground and sieved soil samples were divided into 2 parts; some parts were analyzed using the Walkley and Black method, and the other parts were scanned using near infrared spectroscopy (NIRS). Partial least square regression (PLSR) was used to create a SOM prediction model. The results showed that the SOM content varied from very low to moderate. The content of SOM was significantly higher in the irrigated areas compared to the rain-fed areas. The SOM content was higher in the areas planted with annual crops 3 times a year compared to the areas planted 1-2 times a year. In addition, SOM content was higher in areas planted with 2-3 types of perennial plants, compared to those planted with 1 type of perennial plants. However, the SOM content was not significantly different in the area planted with annual and perennial plants. NIRS technology was relatively accurate in measuring SOM, which was compared with conventional (Walkley and Black) method. Thus, this technology can be used to monitor spatially changes in SOM. With the relatively low SOM in various land uses in the study area, the addition of SOM through fertilization is recommended.

Keywords
soil, organic matter, land use, near infrared, spectroscopy

Topic
Environmental Engineering

Link: https://ifory.id/abstract/ebMBk3FzULCt

Corresponding Author
Syifaa Novianti

Institutions
(a) Department of Business Administration
*syifaa.novianti[at]polban.ac.id
(b) Department of Computer Engineering
(c) Department of Business Administration
Bandung State Polytechnic
Jl. Gegerkalong Hilir, Ciwaruga, Kec. Parongpong, Kabupaten Bandung Barat, Jawa Barat 40559

Abstract
Many studies encourage destinations to consider dispersal and mobility as key strategic components of tourism planning and development. Essential aspects such as destinations visited, the arrival and exit directions become a basis for formulating a tourism planning policy. However, research in examining this paradigm by using a spatial analysis is limited. This paper introduces an analysis by using Geographic Information Systems (GIS) to create a visualization of tourist dispersal and mobility. This methodology was implemented in the Great Ocean Road Region, an iconic regional destination in Australia that is experiencing a limited tourist dispersal. Results from 351 questionnaires were processed by GIS with a web-based application. The data process uses tools, including ArcGIS ESRI to create spatial data and PHP and JavaScript programming languages to visualize the results. The results show that there is a low geographical dispersal in the region with the hinterland area remains untapped while the coastal area receives abundant of tourists. It is aggravated by limited tourist mobility which arrives and exit from the same direction. With GIS technology, the visualization from this spatial analysis shows a possible tourism pressure that is worth-noted by policy-makers in the planning and development process.

Keywords
Spatial Analysis, Geographical Information System, Dispersal, Mobility, Tourism Planning and Development.

Topic
Environmental Engineering

Link: https://ifory.id/abstract/ZyRA8ua6Yrx4

Corresponding Author
Adnan Rafi Al Tahtawi

Institutions
Department of Electrical Engineering, Politeknik Negeri Bandung
Jl. Gegerkalong Hilir Ds. Ciwaruga, Bandung 40012

Abstract
The integration of a wireless network in a closed-loop control system can provide several benefits such as flexibility, installation, and maintenance. However, the presence of time delay in the network system can reduce the control performance. On the other hand, control signal saturation is also the problem that must be overcome in designing a controller. This study aims to design a DC motor speed control by integrating wireless network in its closed-loop system. This concept is known as the Wireless Networked Control System (WNCS). The network parameter used in this study is focused on the time delay. In the controller side, we use a saturation parameter which usually occurs due to limitations of the input signal. The PI-AW controller is used due to having the ability to overcome the saturation of the control signal. The simulation results show that the PI-AW controller can produce the best responses if compared with PI linear and PI saturated with settling time under 1.5 seconds and overshoot less than 8% for three constant values of time delay. The control signal generated also does not exceed the maximum limit of 12 V.

Keywords
WNCS, time delay, saturation, PI-AW controller

Topic
Electrical Engineering

Link: https://ifory.id/abstract/2utfEHX9WRk6

Corresponding Author
Sabrina Nurul Hidayah

Institutions
a) Department of Civil Engineering, Faculty of Engineering Universitas Indonesia, Depok 16424, Indonesia
*ayomi[at]eng.ui.ac.id

Abstract
Renewable energy utilization is recognized as a way to increase energy access for rural and remote areas. However, such efforts are not only depending on the economic and technological aspects but also the support of the society and respective stakeholders. Some studies have focused on managing stakeholder in a wide scope of energy projects but on the other hand, studies in relation to rural electrification project schemes seems to be lacking. To help understand the wider scope of rural electrification, this paper analyses a range of past and current research development on this domain and places the literature on the framework of stakeholder management. The review indicates that stakeholder management in relation to rural electrification program is identified under three major themes such as stakeholder influence, stakeholder identification and classification, and stakeholder involvement.

Keywords
Stakeholder management; Rural electrification; Renewable Energy

Topic
Civil Engineering

Link: https://ifory.id/abstract/zDutWqLMV9Hj

Corresponding Author
Aam Hamdani

Institutions
Universitas Pendidikan Indonesia

Abstract
Based on the findings in the field in the implementation of Mechanical Engineering Drawing learning in SMK Negeri 2 Bandung in 2018/2019 academic year there are still many students who do not master the technique of using drawing tools appropriately, so that it can influence students confidence in participating in learning especially when drawing. The purpose of this study is to find out the picture of the mastery of the technique of using drawing tools and the students self-confidence character, as well as to know the influence of the mastery of the use of drawing tools on the students self-confidence character and to know how much the picture and the influence of the mastery of the use of drawing tools on the character of self-confidence. The research design used is descriptive method, the instruments used are tests and questionnaires, the data is analyzed using normality tests, linearity tests, and hypothesis testing using simple linear regression tests, correlation tests, and coefficient of determination in order to find out how much influence. The results showed that there was a positive and significant influence of the variable mastery of the use of drawing tools on the variable of students self-confidence characters. The implication of the results of the study shows that mastering the technique of using drawing tools can increase student confidence in Mechanical Engineering Drawing subjects. The mastery of the technique of using this drawing tool in addition to having a positive influence in increasing self-confidence, on the other hand also provides optimal results in learning Mechanical Engineering Drawings.

Keywords
Mechanical Engineering Drawings, Drawing Tools, Confidence, Motivation

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/8YmapUbFxvdt

Corresponding Author
Meifal Rusli

Institutions
a) Mechanical Engineering Department, Faculty of Engineering, Andalas University, Kampus Unand Limau Manis, Padang 25163, Indonesia
* meifal[at]eng.unand.ac.id
b) Orthopedics Department, Faculty of Medicine, Andalas University, Jalan Perintis Kemerdakaan, Sawahan Timur, Padang 25171 – Indonesia

Abstract
Scoliosis is defined as a musculoskeletal condition that has an abnormal lateral spinal curvature as its main feature. One of the medical treatments for scoliotic spine is by surgery to install an instrument or implant consists of pedicle screws, rods, and connector in fixation of the spinal curvature. However, many cases of failure both in the instrument and the interface of bone and pedicle screw connections were found. One of the problems occasionally was related to the risks of screw loosening and pulled out. This paper will observe and discuss numerically the stress distribution in the screws and bone interface in scoliotic spine fixation using finite element analysis. The contact interface is modeled variously by bonded contact, friction contact, and frictionless contact. The analysis is done by two types of load; axial or pull out load and shearing load. It is found that in bonded contact between screws and bone, the stress distribution is more uniforms along the contact surface and lower maximum stress in the bone. Therefore, the risk of pulling out the screws will be minimized. On the other hand, friction contact with a low friction coefficients makes the stress distribution in concentrated in specific region and increase the maximum stress in bone.

Keywords
scoliosis; pedicle screws; stress shielding; pull out; contact model

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/ZhLjxVAaB4D3

Corresponding Author
diah cahyani

Institutions
Universitas Pendidikan Indonesia

Abstract
This research is motivated by the low level of student understanding in the Software Application and Building Interior Design subjects, as evidenced by the cognitive value of students in interior material, which is below the KKM (Kriteria Ketuntasan Minimal/Minimal Completeness Criteria) value. This study aims to improve student understanding by implementing Student Facilitator and Explaining (SFE) cooperative learning models. The method used is Classroom Action Research conducted in three cycles. In each cycle consists of planning, implementation, observation, and reflection. Data collection techniques used were student evaluation tests at each cycle, as well as observation sheets of student and teacher activities. Based on the results of the study, the average value of each cycle has increased. In the first cycle, the average number increase by each cycle (second and third cycle). The activity of students and teachers in the class influencing the average number during the implementation of learning takes place. The conclusion of this research is the cooperative learning model with student facilitator and explaining type is proven to be able to improve student understanding in the subject of Software Applications and Interior Design in Buildings

Keywords
Student facilitator and explaining, learning mdel, understanding, interior

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/EZkBAW3h6bre

Corresponding Author
Ai Fatimah Rosdiana

Institutions
Architectural Engineering of Education
Faculty of Vocational and Technology Education
Indonesian University of Education

Abstract
The research aimed to determine the students- learning motivations on Actionbound application implementation as learning media in construction and building utilities subject. This research was grounded by monotonous and boring learning media, so the researcher tried to innovate the learning media used Actionbound application to make students more interested to take class. This research was conducted by 30 second grade students of modelling design and building information program in SMKN 2 Garut, with Research and Development as research method. The data collection was carried out by media assessment sheets, learning motivations questionnaires, and student response questionnaires. Media assessed by expert judgement was considered very suitable to use. The students- media responses considered by media content, media language, strategy effect, and media visual had very good responses. The self efficacy, active, learning strategies, learning value, performance goal, achievement goal, learning environment stimulation, as learning motivation aspects showed a “high” category value. Therefore, the developed Actionbound application is suitable for use as learning media in construction and building utilities subject in SMKN 2 Garut.

Keywords
Research and Development Method, Actionbound application, Learning Motivation.

Topic
Technical and Vocational Education

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

Corresponding Author
Agung Rorhi Prayudha

Institutions
(a) Department of Technology and Vocational Education, Postgraduate School, Universitas Pendidikan Indonesia, Bandung, Indonesia.
(b)Department of Electrical Engineering Education, Universitas Pendidikan Indonesia, Bandung, Indonesia
(c) Department of Electrical Engineering Education, Universitas Pendidikan Indonesia, Bandung, Indonesia

Abstract
This article analyzes the level of student satisfaction in using SPOT UPI Bandung e-learning services. Student satisfaction is taken by distributing questionnaires to respondents. This article compares perceptions with students expectations in using SPOT UPI Bandung services using fuzzy-servqual. The sample of this study was 41 people. The results showed that the gap value for postgraduate student satisfaction with the UPI Bandung SPOT service was still high at -1.584 with a perception value of 7.695 and an expectation value of 9.277. The main conclusion of this study is that UPI Bandung graduate students who use SPOT e-learning services have not felt satisfaction in using SPOT e-learning services.

Keywords
satisfaction;e-learning;fuzzy-servqual

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/6EcL8QB7UMxA

Corresponding Author
Nur Adillawati Kosim Saputri

Institutions
Technology and Vocational Education, School of Postgraduate Studies, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229 Bandung 40154 Indonesia

*nur.adillawati[at]upi.edu

Abstract
The effective development of a Mobile-Based Assessment (MBA) depends on students acceptance. The aim of this paper was to examine the determinants factor of students behavioral intention to use mobile-based assessment. Data were collected from 105 second grade students of vocational high school through an online survey questionnaire. Partial Least Squares (PLS) was used to test the measurement and the structural model. Results showed Perceived Ease of Use as the strongest direct predictor of Behavioral Intention to Use, followed by Perceived Usefulness. Content and Mobile Self-Efficacy only has an indirect effect. These four variables explain 51.3 percent of the variance of Behavioral Intention to Use.

Keywords
Mobile-based assessment; Technology acceptance model; Mobile-based assessment acceptance model

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/HPcDytKuW8NM

Corresponding Author
Mustika Nuramalia Handayani

Institutions
a) School of Postgraduate Studies, Universitas Pendidikan Indonesia
b) Study Program of Agro-industry Technology Education, Universitas Pendidikan Indonesia
*mustika[at]upi.edu
c) Faculty of Education, Universitas Pendidikan Indonesia
d) Faculty of Technology and Vocational Education, Universitas Pendidikan Indonesia

Abstract
Nowadays labour market demands employees with green skills due to green economy transformation. Students of agricultural vocational school as prospective workers have to hold these skills. This study was designed to identify students- green skills in agricultural vocational secondary schools at study program of agricultural food processing technology. Five aspects that make up green skills based on past research were examined in this study. Data were collected through a set of questionnaire intended to gauge perceptions involving 195 students from different agricultural vocational schools in West Java Province, Indonesia. The results revealed that mean score for overall green skills was fair enough. However it needs to be increased to produce competitive graduates in accordance with employer needs. Moreover, three aspects of green skills, namely management of waste, communication skills and innovation skills to respond green challenges are lower than the mean score. Findings of this study are the initial step in describing green skills of agricultural vocational students due to the limitations of this related research. More studies should be conducted to better understand and stimulate the integration of green skills into agricultural vocational curriculum to improve students green skills.

Keywords
agricultural vocational; green skills; students

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/7hmpAXwK6nzt

Corresponding Author
Achmad Abrar Haziri

Institutions
1) Departement of Civil Engineering Lecturer of Politeknik Negeri Bandung. Jl. Gegerkalong Hilir, Ds. Ciwaruga, Bandung 40012. Email: syahril_polban[at]yahoo.com
2) Departement of Civil Engineering Lecturer of Politeknik Negeri Bandung. Jl. Gegerkalong Hilir, Ds. Ciwaruga, Bandung 40012. Email: andri_krisnandi[at]polban.ac.id
3) Departement of Civil Engineering Graduate Student of Politeknik Negeri Bandung. Jl. Gegerkalong Hilir, Ds. Ciwaruga, Bandung 40012. Email: ahmad.abrar.mtri18[at]polban.ac.id

Abstract
Soft clay is soil that need microscopic to sub microscopic size originating from the chemical weathering of rock compilers. Clay soil is very hard in a dry state and is plastic at moderate water content. At higher water contents the clay soil is sticky (cohesive) and very soft. Soil stabilization is an effort to improve the quality of the soil by using certain materials to increase soil strength. Soil stabilization is the process of mixing soil with certain materials to improve the technical properties of the soil and is an attempt to change or improve the technical properties of the soil to meet certain technical requirements of the soil carrying capacity. This research is an experimental study to determine the carrying capacity of clay soil stability using volcanic ash deposits and tailings instead of cement. The research variables are volcanic ash deposits which is locked of 8% and tailings with the variation of 4%, 5%, 6% and ripening for 3 days, 7 days and 14 days. The benefits of this experimental study are expected to get the carrying capacity of the soil from stabilized soil greater than the carrying capacity of the original soil by the unconfined compression test (UCS).

Keywords
Soft clay, volcanic ash, tailing, stabilization, compressive strength.

Topic
Civil Engineering

Link: https://ifory.id/abstract/TnjB4UaZdFvm

Corresponding Author
Lely Syiddatul Akliyah

Institutions
(a),(b) Urban and Regional Planning Program Study, Faculty of Engineering, Universitas Islam Bandung
Jalan Tamansari No. 1 Bandung

Abstract
Bandung City has many thematic parks spread across several districts. One of them is Taman Lansia (Elderly Garden). Although according to Bandung City Government that parks are intended for all age groups, there should be a target for visitors based on different age groups in each park based on the theme. The elderly have physical and psychological limitations that cause the elderly community to have special needs that are different from the productive and pre-productive age communities (Cooper & Francis, 1998), so special facilities are needed for the elderly in Bandung. Based on observation, existing facilities in Taman Lansia have not been able cover the needs of the elderly.So that, the purpose of the study are identify visitor characteristics and analyzing the needs of the facilities needed at Taman Lansia according to the characteristics of the elderly. The data collection methods are observation, questionnaires, and interviews. It used descriptive analysis. This study indicate that Taman Lansia visitors are dominated by elderly residents. There are several types of facilities that have not been provided in accordance with the characteristics of the elderly such as ramp handrails. The available facilities do not consider the characteristics and needs of the elderly.

Keywords
Facilities Needs, Taman Lansia, Elderly, Bandung City

Topic
Environmental Engineering

Link: https://ifory.id/abstract/xgEmQVfj4ube

Corresponding Author
ega berman

Institutions
1) Program studi PTK, Sekolah Pascasarjana, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No.229 Bandung 40154, Indonesia
*) egatb[at]upi.edu
2) Departemen Pendidikan Teknik Mesin, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No.229 Bandung 40154, Indonesia
3) Departemen Pendidikan Teknik Elektro, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No.229 Bandung 40154, Indonesia

Abstract
The purpose of this study was to determine the implementation of student practicum in air conditioning courses in vocational education. The practicum that was revealed in this research included: the aims of the practicum, the preparation of practicum, the condition and number of practicum tools, the practicum time, the practicum implementation process, the competence of lecturers and laboratory assistants, as well as the practicum evaluation. This study used a qualitative method with research participants being students in the refrigeration and air conditioning expertise group (KBK RTU) at a state university in Bandung. The informants involved in this study were seven students who had carried out the air conditioning practicum for in-depth interviews. The FGD (focus group discussion) interview method is used to get general information and individual interviews to get more specific data. The results of this study are expected to provide accurate information about the practicability of student practicum, so that better improvements can be made in the future. The implementation of an ideal practicum will support students to develop hands on and minds on.

Keywords
Air conditioning courses, practicum, vocational education

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/QeB7GRqtgajp

Corresponding Author
Restu Minggra

Institutions
(a) Architecture Department, Universitas Pendidikan Indonesia. Jl. Dr. Setiabudhi No. 207, Bandung.
*rminggra[at]upi.edu

Abstract
Maintaining the quality of transportation buildings is necessary, refer to the number of passengers that escalating every year. Effective movement management is essential to assist the passengers direction and determine the orientation at the transportation building. Signage, as part of the wayfinding system, plays a vital role in managing the passengers movements. The appearance of signage that dominates the visuals in the building intensifies the value of the signage itself. Furthermore, the signages transformed into a significant element that creates another quality for the building. This research aimed to found the role of the signage as part of the building component in the several terminals of MRT and KRL in Jakarta. Observation and data collection related to architecture and signage have been carried out. The result shows that signage has a role in how users experiencing the building and the transportation system itself.

Keywords
signage; transportation; Wayfinding System;

Topic
Architecture

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

Corresponding Author
Ghusrina Prihandini

Institutions
Politeknik Negeri Bandung

Abstract
Biodiesel is one of the most promising renewable alternative fuels. Subcritical water is a green technology which can be employed to convert rice bran with water and methanol to fatty acid methyl ester (FAMEs) or biodiesel with adding CO2 gas as co-solvent and N2.This study investigates the influence of operation condition to obtain biodiesel from rice bran oil. Some solvents concentrated, range of temperature ,pressurized gas and reaction time were applied in this research. Rice bran, water, and ethanol were put into subcritical water reactor in a certain ratio at 40 bar to carried out the reaction under subcritical condition. The best condition 30/10 methanol-water (v/v), t= 7 h, T = 200 0C,CO2 as co-solvent were highest yield oil obtained 18% with oleic acid methyl ester as the major identified biodiesel

Keywords
biodiesel, rice bran, subcritical methanol, subcritical water

Topic
Chemical Engineering

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

Corresponding Author
Aviasti Anwar

Institutions
(a,b,c) Departement of Industrial Engineering
Universitas Islam Bandung
Jl. Tamansari No. 1 Bandung, West Java, Indonesia
(d) School of Technology Management and Logistics
College of Business, Universiti Utara Malaysia,
06010 UUM Sintok, Kedah Darul Aman, Malaysia

Abstract
Research to be conducted to understand how people perform processing organic waste into compost, so as to improve the quality of life particularly in economic terms. Moreover, it can be identified factors and constraints that affect the community at the time of processing organic waste into compost. Organic waste is one of the solid wastes produced from household / domestic waste. Primary data collection is done by means of interviews and field observations in selected rural communities. While the secondary data collection is done with literarur studies. The study is expected to be a reference to the relevant institutions in the process of training to the community, especially in the processing of organic waste. This research was conducted by taking samples in rural communities in Indonesia and Malaysia. The purpose of this study as follows: Identify the factors that determine the success of the community in processing organic waste into compost so as to improve the quality of life; Identify barrier experienced by the community when composting. The results of the research are expected to show a comparison of the success patterns of rural communities in Indonesia and Malaysia in processing waste into compost.

Keywords
organic waste, composting, quality of life, economic value

Topic
Industrial Engineering

Link: https://ifory.id/abstract/P8dKuAcT7QUe