Indonesia Conference Directory

Corresponding Author
Feriyonika Feriyonika

Institutions
Electrical Engineering Department, Politeknik Negeri Bandung, West Java, Indonesia

Abstract
In a process control system where the sources of control parameters are separated in large area, it is computationally hard for controller hardware to operate multitasking so that one-central controller is not effective anymore. Therefore, it is considered to distribute controlling process in several Local Control Units (LCU). This paper proposed a simple master control algorithm that coordinates several PID controllers for controlling the complex parameters in the water mixing process. Level and Temperature are the main controlled variables (SVG) which are influenced by three parameters i.e. flow-in of cold water, flow-in of hot water, and flow-out of main tank. These parameters are then distributed to LCU-1 to LCU-3. For maintaining the SVG, the master controller is designed based on the difference between SVG and feedback of the main-tank (PVG) so that it results several Set-points (SV) which are then sent to each LCU. The obtained results indicated that the responses are 42s, 0%, 45.3s, for settling-time (Ts), %-overshoot (OS) and rise-time (Tr), respectively for water temperature controlling and 60s, 0%, 62s for Ts, %OS, Tr, respectively for water level controlling. Overall, complex process control involving many process parameters have been solved via distributed PID controllers.

Keywords
PID, LCU, Process Control, DCS

Topic
Electrical Engineering

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

Corresponding Author
Afrin Fauzya Rizana

Institutions
(a) industrial engineering department, Telkom University, Bandung 40257, Indonesia
(b) information system department, Telkom University, Bandung 40257, Indonesia
(a) industrial engineering department, Institut Teknologi Nasional, Bandung 40124, Indonesia

Abstract
The implementation of e-learning become more and more popular among higher education institution. However, the costly implementation of e-learning not a guarantee that it will be successfully adopted. There are reports where the adoption rate of e-learning its users is often low, resulting the expected benefits failed to be achieved. In order to solve this issue, the important factors that influence users adoption and usage rate need to be identified. Therefore, this study aims to identify the critical factors of e-learning success in higher education. A systematic literature review protocols was employed in this study to identify the success factor of e-learning from previous literature. The review process is conducted towards articles published in science direct and emerald insight from the past 5 years. There are total 21 articles selected as primary articles for further review. According to the articles reviewed in this study, the success of e-learning implementation is reflected on three variables i.e. users satisfaction, actual usage, and continuance usage. Moreover, there are six dimension that is critical towards e-learning success i.e. students characteristics, instructors characteristics, users extrinsic motivation, learning environment, instructional design, and support. In addition, an e-learning success model for higher education was also developed.

Keywords
critical success factors; e-learning success; higher education; systematic literature review

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/nmPBp7gJAvMq

Corresponding Author
Riswandha Risang Aji

Institutions
Urban and Regional Planning UNISBA

Abstract
Environment is related to tourism as one of its components to maintain tourism sustainability. Eco-tourism is environment-based tourism that run by community to improve community capital which lived in its community. The community capitals that can be an input to community-based tourism which will practice the eco-tourism. This research aims to explain how the eco-tourism can be implemented through community-based tourism. The findings of this research are Pentingsari tourism village reach self-organisation through community-based tourism concept by using human and social capitals that the community have, Pentingsari tourism village reach self-sustainability through community-based tourism concept by using natural and cultural capitals, and from self-organisation and self-sustainability Pentingsari tourism village can provide eco-tourism to its tourists. This research concludes eco-tourism in Pentingsari village can be reached by using self-organisation and self-sustainability. Self-organisation and self-sustainability can be reached by using community capitals in community-based tourism concept.

Keywords
Eco-tourism, community-based tourism, sustainability

Topic
Environmental Engineering

Link: https://ifory.id/abstract/yBrGCpgWU627

Corresponding Author
Shinta Amelia

Institutions
Universitas Ahmad Dahlan

Abstract
The development of industry causes energy needs to increase. So that fossil energy reserves are increasingly depleting. This resulted in the growth of various alternative energies. One alternative energy that is being developed is biomass-based energy. Biomass is a renewable energy source that comes from plants both directly and indirectly. Indonesia is a country with a tropical climate that has a very large biomass potential. One of the methods that can be used in processing biomass is gasification, which is a process to convert solid biomass raw materials into fuels (syngas). The problem from the gasification process is the syngas produced has a low purity level. This is because there are still impurities that are contained in syngas. Therefore, a purification unit is needed in the gasification device. This research aims to make absorbents that can be used in gasification purification units. The types of absorbent used is coconut shell activated carbon. The pore structure of carbon is characterized by using an N2-sorption analyzer (Nova 2000, Quantachrome). Based on the results of characterization, it can be seen that the specific surface area of activated carbon absorbent from the coconut shell is 1320 m2/gram with an average pore diameter of 1.82 nm. The experiment device mainly consisted of gasification reactor, filter, and blower. The gasification reactor was installed to heating the biomass with the supply oxygen. The reactor had a height of 170 cm and a diameter of 50 cm in which the bagasse with the capacity of 15 kg/h was quickly burned. The gas filter contains the absorbent to clean the syngas product. The absorbent was installed in upper four holes. The blower was used to suck up the syngas. Some thermocouple and gas indicator were installed to monitor the condition in the system. The syngas production was analyzed by the GC/MS analysis. The effect of absorbent is to improve the syngas composition such as CO, H2, and CH4. The syngas contents in our experiment were CO, CH4, and H2 with a percentage of 9.294%, 1.348%, and 7.773%, respectively. These results are better than the previous research with the syngas contents are 7.891% of CO, 0.100% of CH4, and 0.889% of H2 because the previous research was not equipped the absorbent.

Keywords
Absorbent; Activated Carbon; Biomass; Gasification

Topic
Chemical Engineering

Link: https://ifory.id/abstract/mV8gRKC2qwGQ

Corresponding Author
Tri Hariyadi

Institutions
a) Chemical Engineering Department, Politeknik Negeri Bandung, Jl. GegerkalongHilir, Ds. Ciwaruga, Bandung 40012
* tri.hariyadi[at]polban.ac.id

Abstract
This study aims to determine the effect of roasting temperature on chemical content of coffee beans at various fruit maturity. Robusta coffee was obtained from Karawang Regency, West Java. After picking, sortation, and drying in the sun to 10% moisture content, the coffee beans were roasted at 190℃, 200℃, 210℃ for 12 minutes. Physical properties observed were weight loss during the roasting. The chemical content observed were water, caffeine, fat, chlorogenic acid and ash before and after roasting. Chemical content analysis was performed using gravimetric methods, soxhlet extraction, and UV-Vis spectrophotometry. The color, aroma and flavor of roasted bean were conducted by organoleptics test. The results obtained, the ripe coffee bean with roasting temperature of 210℃ is the best, which gives the lowest yield. The unripe green beans have the highest water content. The roasting temperature did not provide a significant difference in fat, caffeine, chlorogenic acid, and ash content. Organoleptic test results (color and aroma) showed that the mature beans with roasting temperature of 200-210℃ were the most preferred, while the coffee brew most preferred was overripe bean with the roasting temperature of 200℃.

Keywords
caffeine; fruit maturity; roasting temperature; robusta coffee

Topic
Chemical Engineering

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

Corresponding Author
Sri Wuryanti

Institutions
Politeknik Negeri Bandung

Abstract
Geothermal is one of the most significant natural resource potentials in Indonesia. One power plant that utilizes geothermal steam as its energy source is PLTP. Geothermal steam that has passed through the geothermal power plant separator to move the turbine while the residual waste (brine) with a high enough temperature has the potential to be a source of heating to produce electrical energy in the Kalina cycle generator. The Kalina Cycle is one of the brine utilization cycles that uses a mixture of two working fluids in the form of an ammonia-water mixture. Using brine, before entering the turbine, it must first become airtight in the evaporator. The design of the evaporator must be such that it meets the operative requirements namely the pressure drop value and the dirt factor. Different variations of brine rate will produce different pressure drops and soil factors. Brine rate variations are 80 tons/hour, 120 tons/hour, 160 tons/hour, 200 tons/hour and 240 tons/hour show the lowest pressure drop of 0.086 bar and the most massive 0.63 bar, and the smallest dirt factor is 1.47 × 10 -6 ((hr)(m^2)^oC)/Joule moreover, the largest is 2.69 × 10-6 ((hr)(m^(2)^o C)/Joule.

Keywords
brine, generator, electrical, evaporator, steam, turbin.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/ytgY3U8aPTLG

Corresponding Author
Rizki Muliawan

Institutions
a,c,d) Politeknik Negeri Bandung, Jl. Gegerkalong Hilir, Ciwaruga, Kec. Parongpong, Kabupaten Bandung Barat, Jawa Barat 40559, Indonesia
*rizki.muliawan[at]polban.ac.id
b) Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia

Abstract
Propane R-290 as hydrocarbon refrigerant has more benefits from the aspect of thermophisical properties, but the only weakness from this refrigerant is flammable. The distribution prediction of R-290 leakage to an air-conditioned room was simulated using Numerical Simulation of CFD ANSYS FLUENT V.13. The distribution of R-290 with a leakage rate of 0,001kg/s and an airflow of 0,1m/s will run out after 600s, with 0,002kg/s will run out after 300s and with 0,005kg/s and 0,5m/s will run out after 120s. The mass flow rate can influence the refrigerant distribution of leakage effect flowrate. Air flow can increase the dispersion of refrigerant gas and decrease the level of refrigerant amount at any certain point in the room after the refrigerant charge was run out. This momentum effect was due to the impact of supply air initial velocity. The buoyancy effect was due to R-290 density is greater than the air makes the refrigerant flows downward, accumulated and stagnant. Make sure that the contactor relays and other electrical tools have the position of: x=0 m ≤ x ≤ 1 m on y= 0 m ≤ x ≤ 2.6 m and then y= 1 m, x= 0 m ≤ x ≤ 4 m.

Keywords
Refrigerant Distribution, Flammable, CFD Numerical Simulation, Leakage, Hydrocarbon

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/GwLjPg8tDNE6

Corresponding Author
Aldi Raimon

Institutions
Department of Civil Engineering Education, Faculty of Technology and Vocational Education, Indonesia University of Education

Abstract
Pervious concrete with marble and gravel substitution shows low compressive strength. In another attempt the experiments carried out by adding fly ash as much as 20% of the weight of cement showed an optimal strength. This research aims to increase the compressive strength of pervious concrete by modify coarse aggregate proportions and adding fly ash admixture. Method that used is experimental with 4 variations aggregate size mixture .Type 1 are agregate variation size of 2 cm, 1,5 cm, and 1 cm, type 2 are agregate variation size of 2 cm and 1,5 cm, type 3 are aggregate variations size of 2 cm and 1 cm, and type 4 agregate size 2 cm. Tests are on permeability test and concrete compressive strength test on age 3 days, 7 days, 14 days, 28 days. Permeablity test results based on type of variations agregate size respectively are 0,750 cm/sec, 0,737 cm/sec, 0,647 cm/sec, and 0,840 cm/sec. The results of the compressive strength test on all type at 28 days respectively are 8,008 MPa, 9,879 MPa, 11,542 MPa, and 8,357 MPa. Results of research on variations in the mixture, the maximum compressive strength is variations of coarse aggregate size 2 cm and 1 cm.

Keywords
pervious concrete, fly ash, marble waste, permeability, compressive strength.

Topic
Civil Engineering

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

Corresponding Author
Ahmad Hamas Sorimatua Harahap

Institutions
a) Civil Engineering, Politeknik Negeri Bandung, Bandung Barat 40559, Indonesia
*metty[at]polban.ac.id

Abstract
Fire disasters could occur in the area around the bridge so that fire contact against the concrete and causes construction run into extreme temperature rises. Concrete which affected with high temperature will lost its strength significantly by 60%. To overcome this problem is utilizing steel industry waste, that is Ground Granulated Blast Furnace Slag (GGBFS) which is used as a substitute for cement in concrete mixtures. The properties of GGBFS which is cementitious same as cement, so that it can fulfill the function of cement. In this research, GGBFS concrete and normal concrete with strength of concrete is 30 Mpa and both types of concrete will be burned at a temperature of 600˚C for 2 hours. After that, characteristics strength of concrete will be tested to GGBFS concrete and normal concrete in each concrete before being burned and after being burned. The result of this research is GGBFS material optimization as a substitute of cement to concrete along with the comparison of concrete characteristics shows that GGBFS concrete is stronger than normal concrete nor before and after being burned. Therefore, girder beams with GGBFS has better strength and resistance to fire than normal concrete.

Keywords
Beam; Concrete; Fire damage; GGBFS

Topic
Civil Engineering

Link: https://ifory.id/abstract/Df28eHQZXtzk

Corresponding Author
Adelfy Dara Arianti

Institutions
a) Civil Engineering, Mercu Buana University
Jl. Meruya Selatan No. 1, Meruya Selatan, Kec. Kembangan, DKI Jakarta 11650, Indonesia
*adelfydaraarianti[at]gmail.com
*resmi.bestari[at]mercubuana.ac.id

b) Civil Eningeering, Katolik Widya Karya Malang University, Jl. Bondowoso 2-Malang No. 2, Gading Kasri, Kec. Klojen, Kota Malang, Jawa Timur 65115, Indonesia
*agneshpatty[at]gmail.com

Abstract
Concrete are brittle material is generally consists of many micro cracks which are potential sources of crack propagation that lead to the possibility of catastrophic failure (rapid or catastrophically) resulting in fracture of the concrete structure under service load. The relationship of fracture energy with material properties has not been clearly identified, with most studies showing insensitivity relative to the water-cement ratio where cracks in concrete propagate particularly along the cement-aggregate interface. This study was an experiment on the effect of water-cement ratio on fracture energy based on RILEM method with several tests such as compressive strength, modulus elasticity and flexural strength. Fracture energy was measured through a three-point-bending test of notched concrete beams. The configuration of the beams was 20x10x120 cm with the ratio of notch to depth was 0.25 and the loading rate was 0.05 mm/min. The testing controlled by midspan deflection which produced a load-displacement curve. Concrete mixtures contain crushed aggregate with maximum sizes of 19 mm are tested at ages 28 days and have water-cementitious (w/cm) ratios are 0.30, 0.40 and 0.6. The correlation between fracture energy and water-cement ratio are characterized by the fracture energy does not increase while the compressive strength is increase. This can be seen when concrete which contains a lower water-cement ratio (0.3) tends to have a rather high compressive strength but decreased the fracture energy.

Keywords
compressive strength; modulus elasticity; fracture energy; water-cementitious ratio

Topic
Civil Engineering

Link: https://ifory.id/abstract/bMpPWfT6xHXr

Corresponding Author
Sriatun atun

Institutions
Universitas Negeri Surabaya

Abstract
Creative teachers are the key to the success of vocational learning in the XXI century. One of the learning models applied to vocational learning is a problem solving or problem solving learning model. The purpose of this study is to describe the effectiveness of vocational mathematics teachers in the learning process with problem solving models in terms of their application, as well as an overview of problem solving skills of vocational high school students. The main instrument of this study was the research themselves assisted with problem solving questions, questionnaires and observation sheets. The results showed that the aspects of learning planning preparation had shown to be effective, but there were still less effective indicator, namely the preparation of worksheet and the use of teaching aids. The category of problem solving abilities of vocational high school students in understanding the problem on average is quite good. But the indicator verifies the results of the answers including the less category.

Keywords
Mathematics Learning, Problem Solving, Vocational High School

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/9gfxva7pdUAX

Corresponding Author
Habibinur Habibinur

Institutions
1 Jurusan Pendidikan Teknologi dan Kejuruan, Sekolah Pascasarjana Universitas Pendidikan Indonesia, Bandung, Indonesia
2 Jurusan Pendidikan Teknik Elektro, Universitas Pendidikan Indonesia, Bandung, Indonesia
* Corresponding Author
E-mail: habibinur[at]upi.edu, ade_gaffar[at]upi.edu

Abstract
The use of smartphones in the 21st century in the learning process has become a concern of researchers especially in the world of education. Given the many uses of smartphones in the learning process, researchers are trying to develop smartphone-based learning media to be applied to the educational environment. But the lack of knowledge on how to use a smartphone can influence students interest and motivation to learn positively. The application of smartphones in the learning process includes the use of smartphone-based Augmented Reality applications. This article discusses a literature review that focuses on the use of smartphone-based Augmented Reality in the educational environment in the last 5 years at all levels of education. The result of 25 articles that has been reviewed, the learning process using Smartphone-based Augmented Reality applications was effectively used to increase students interest and motivation to learn. This is a separate note for researchers to recommend smartphone-based Augmented Reality Applications even more applied to the world of education.

Keywords
Smartphone, Augmented Reality, Learning, Literature Review

Topic
Technical and Vocational Education

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

Corresponding Author
TIAMYOD PASAWANO

Institutions
Rajamangala University of Technology Thanyaburi, Faculty of Technical Education, Klong 6, Thanyaburi, Pathum Thani 12110 THAILAND
Mobile: +66815445575 E-mail: tiamyod[at]rmutt.ac.th

Abstract
This research aims to 1) study the effectiveness of the students- critical thinking through the web-based learning on the criteria of 80/80 2) compare the pre-test and post-test scores of the students- achievement of the critical thinking through the web-based learning, and 3) study the students- satisfaction of the study through the web-based learning. The sample was drawn from cluster (area) sampling were 115 of grade 3 students studying at Banlanwittayakom school, Khon Kaen province, Thailand. In the 1st semester of the academic year 2019. Data were analyzed by using simple statistic models and t-test. The results were shown in the following. 1) The effectiveness of critical thinking through the web-based learning of being ashamed of sin content in the Buddhism subject has met the criteria of 80/80. That is the effectiveness of the critical thinking contains 82.07/82.01 which means that the web-based learning designed is efficient and appropriate to be used in the learning process of the be ashamed of sin content. 2) The post-test scores showing the success of the students- critical thinking through web-based learning, be ashamed of sin content, was significantly higher than the pre-test scores at the .05 level of significance. 3) The students satisfaction of the web-based learning contains a high level of satisfaction on the content (3.52), whereas all of the remaining satisfaction on the design, the presentation, and the advantages contains the highest level of satisfaction (3.42, 3.52, and 3.67 respectively).

Keywords
Web-Based Learning, E-Learning, Critical Thinking,

Topic
Computers, Internet, Multimedia in Engineering Education

Link: https://ifory.id/abstract/bw3WuaUdeyK9

Corresponding Author
Tina Mulya Gantina

Institutions
a) Energy Conversion Engineering - Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Ciwaruga, Bandung 40012, Indonesia
*tina.gantina[at]polban.ac.id

Abstract
The problem with the slow process of anaerobic biodegradation, especially in food waste, is that the rate of biogas production cannot keep up with high demands for fuel on the market. Several studies have been carried out to optimize the rate of biogas formation, including the addition of a microbial starters and pretreatments. The objective is to examine the production and characteristics of biogas with raw material for food waste (vegetable market waste) plus EM4 and GP-7 microbial starter, using batch biodigester system. The specific target of this research is to determine the performance of biogas manufacturing process by a combination of two techniques, the pre-treatments of raw vegetable waste and microbial starters. The research methods used consist of the design and manufacture of batch system biodigesters, determination of raw material characteristics, preparation of raw materials by pretreatment (enumeration and immersion in 3% NaOH solution) and addition of starters, namely EM4 and GP-7. By combining the two techniques, biogas production with greater volumes and concentrations of methane gas can be obtained in a relatively short period to catch up with market demands.

Keywords
food waste, anaerobic degradation, biogas production rate

Topic
Chemical Engineering

Link: https://ifory.id/abstract/mCA9LQzTedcB

Corresponding Author
Chairiza Azmi

Institutions
Post-Graduate Studies School, Universitas Pendidikan Indonesia, No.207. Dr. SetiaBudhi Street, Bandung 40145, Indonesia.
azmichairiza[at]upi.edu

Abstract
Heutagogy is a study of learning that is determined independently by the learner, it can also be seen as a natural development from the previous educational methodology. The main purpose of this paper is to collect and analyze data on technological issues used in the Electronic Heutagogy For Lifelong E-Learning approach. The method used to collect information and data to use in this research is through literature reviews of 30 papers from 2014-2019 that are suitable for the topic of the discussion. Electronic Heutagogy is based on technology and combined with digital media. Research is beneficial for the community because now lifelong learning is not only carried out with a face-to-face approach, but can be applied anywhere and anytime through online. Besides being able to reach a wider circle, it can also save time in learning. This research shows that technology and education should be done together and integratedly.

Keywords
Electronic Heutagogy, Lifelong learning, E-Learning

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/N3K7jYEDTahd

Corresponding Author
Aceng Gima Sugiama

Institutions
Politeknik Negeri Bandung (Polban)

Abstract
The customer of online tickets continues to increase including for the millennial segment in Indonesia, but how the causality of electronic service quality, perceived value, and loyalty intention variables on online ticket customers. The aim of this research is to examine the causality of electronic service quality, perceived value and loyalty intention on ticket online customer service. The research theory of this study is the use of E-S-QUAL (Electronic-Service Quality). This descriptive research utilizes the ticket online service in Indonesia as a case, with the e-commerce user population for online shop ticket services in Indonesia, a sample size of 514 respondents, and data were analyzed using the regression model. The results show that online ticket customers consider that the higher level of electronic service quality (efficiency, fulfillment, system availability, and privacy) can increase the perceived value of the customer concerned. Better customer perception of perceived value will increase the customers loyalty intention. In addition, the higher the quality of electronic sales services, can increase customer loyalty of online ticket shops.

Keywords
E-S-QUAL (Electronic-Service Quality), perceived value, loyalty intention

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/C6VmYk9uxbqa

Corresponding Author
Sugeng Rifqi Mubaroq

Institutions
Vocational and Technical Education Program
School of Postgraduate - Universitas Pendidikan Indonesia, Bandung West Java

Abstract
The industry has been affected by changes in technology and innovation. This paradigm is called the industrial revolution. This revolution is caused by mechanization, the use of electrical, electronic and automation energy. Industrial revolutions affect not only production itself, but also the labor market and the education system. One of them is vocational education, a system that prepares labor. Todays, due to the development of digitalization and robotics, it is known as the Industrial Revolution 4.0. Emerging technologies have a profound effect on public education. The skills needed by employee now have change due to the changes of the technologies. In this paper, we do a literature review about the employability skills that must be possessed by employees in industry 4.0, based on the latest research by conducting meta-analysis techniques. We propose a socio-technical system approach. Socio-technical system theory leads to social system and technical system, which are deliver better and more acceptable to end users. So that new competency models can be found to bring up new job profiles in accordance with industry 4.0. The results obtained, in addition to the technical skills demanded by employment, also communication skills especially in English, problem-solving skills, teamwork, critical thinking, entrepreneurial skills and computer skills.

Keywords
employability skills; industry 4.0; socio-technical system

Topic
Technical and Vocational Education

Link: https://ifory.id/abstract/ekx7JZmAu9XG

Corresponding Author
Risma Nur Indah

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

Abstract
Energy is the core of important issues such as the economy, environment, and world development. Indonesia as a developing country needs energy access so that the nation can increase people prosperity. Indonesia has successfully surpassed the electrification ratio target by the end of 2018. However, electrifying the remaining 1.7% will be more difficult and costly. This paper provides a better understanding of the challenges of rural electrification program and opportunities to achieve electricity universal access. In this research, we used a literature review method to collect and review relevant studies regarding rural electrification program. Based on the literature review, characteristic of rural areas such as low population density with low income and low electricity demand becomes the main challenge of electrifying rural areas. According to the studies, committed governance, supportive regulation and policy, and well-prepared financing can overcome the barriers

Keywords
Energy, electricity, rural areas, Indonesia, challenges, opportunities.

Topic
Civil Engineering

Link: https://ifory.id/abstract/zZeq7npwy2rE

Corresponding Author
A. Harits Numan Djaohari

Institutions
Universitas Islam Bandung

Abstract
Energy efficiency had become a major issue concerned by a lot of companies involves both public and private sector. The building sector is one of the biggest energy users. University buildings are high consumers of energy in the category of commercial buildings due to its activities and population. Therefore, it is very important for every university to take this problem seriously and practice good energy management. This study aims to analyze the main element contribute toward the increasing pattern of energy consumption in UNISBA. Mixed-method approach will be employed in this study to get both quantitative and qualitative data to meet the specified objectives. Hopefully, this study will help to implement of new strategies in energy efficiency management for university and create the new standard in reducing energy consumption in university building.

Keywords
Energy efficiency, energy management.

Topic
Industrial Engineering

Link: https://ifory.id/abstract/rV7RdfbQkpBe

Corresponding Author
Chusharini Chamid

Institutions
1. Lecturer of City and Regional Planning Unisba
2. Expert Group of Natural Resources Exploration, ITB
3. PT Solusi Global Berkelanjutan
4. Student of City and Regional Planning Unisba

Abstract
Reclamation in the former mining area is a series of ongoing activities with planned post-mining activities, so that the reclamation activity plan is adjusted to the post-mining activity plan. However, a lot of ex-mining land at this time, especially abandoned tin mine in Bangka Belitung Province is not well covered so it does not meet the applicable post-mining rules. Planning for reclamation of ex-mining land that has been abandoned or that has been re-mined by the community is a challenge to represent a concrete manifestation of sustainable management in the Indonesian mining sector, which refers to Government Regulation No. 78 of 2010 and the Minister of Energy and Mineral Resources Decree No. 1827 2018. Preliminary investigation of the condition of the land to be reclaimed is done by using a "drone", so that data collection can be done quickly and can present the original condition. "Drone" equipment is equipped with the concept of photogrammetry so that the results can be used for topographic map making. Some factors that need to be considered in the reclamation of alluvial tin mining are geological hazards, hydrological, hydrogeological, re-mining and monitoring. With good data from these aspects, good engineering can be carried out to realize the reclamation of the land of the former alluvial tin mine that is sustainable.

Keywords
reclamation, post-mining, alluvial tin, sustainable

Topic
Environmental Engineering

Link: https://ifory.id/abstract/8vVXJH7jzbC3

Corresponding Author
DR.IR.FIRDAUS CHAIRUDDIN.MS

Institutions
Civil Engineering Department, Atma Jaya University Makassar, Mamajang, Makassar City, South Sulawesi

Abstract
Soil is the basic of a structure or construction, such as building construction also highway construction, and it-ll become a problem if the soil had a bad properties inside. Bad properties of soil can have a bad impact for any constructions. You can experience damage to the structure, something that is very undesirable in construction. Bad properties we mean here are those soil that have low shear strength, relatively large shrinkage growth, high plasticity limit. The type of soil found in the Atma Jaya University Makassar area is clay soil, so the author tries to investigate the effect of expansive soil stability based on the addition of styrofoam material in different levels of addition (5%, 10%, 15%, 20%, 25%), with the research title: “ENGINEERING PROPERTIES OF CLAYEY SOIL STABILIZED WITH STYROFOAM (C_{8}H_{8})” Based on the topic we chose, it means to require the stabilization as what the soil needs it absolutely takes so much efforts to improve the soil properties before doing a construction by enhancing the strength of it. There are two ways for enhancing soil properties, such as mechanical process and chemical process. One of the chemical process that will be applied here is with the additions of “Styrofoam” in the soil sample. The methodology we use on the laboratory testing are: moisture content testing, density testing, Atterberg limits testing, filtration analysis testing, and the compaction testing. The result is the significant change on the clay soil compaction test chart at the adding of 15% Styrofoam on the soil sample taken from Atma Jaya University Makassar-s ward. The significant changes we mean are the decreasing value of optimum water content from 23% to 16% and also value of maximum dry weight (γdry max) on the clay soil sample from 3.676% to 1.554%.

Keywords
Engineering properties; Stabilization; Clay soil; Styrofoam

Topic
Civil Engineering

Link: https://ifory.id/abstract/ZzY9P7ryaXDt

Corresponding Author
Apri Wiyono

Institutions
Universitas Pendidikan Indonesia

Abstract
The quality of the gas has to meet the demand placed on it for use in a gas engine or gas turbine, as well as the demand for reduced emission to the environment. This study applies the design to the following testing of downdraft gasifier with biomass energy for municipal solid waste. The main objective of this paper is evaluating of gas purification unit performance for tar reduction in gasifier systems, integrated producer gas purification unit namely rotary separators. Experiments carried out with AFR gasification system parameters 0.48; 0.5; 0.54 and variations of the exhaust speed of the rotary separator suction fan are 0.9; 3,4; 4,4 m/s. All parameters are interpreted in order to produce producer gas that is clean from tar and impurity and has high calorific value as a substitute fuel for gasoline generators. The experimental results of the 3 variations of the test, found that gasification AFR at 0.54 is the point that produces the largest producer gas with LHV, which is 8500 kJ/Nm3, although the tar content is still relatively high at 3788.1 mg / m3. After roary separator is installed, the tar content can be reduced significantly to 210.45 mg/m3 at scrubbing water discharge 3.33 l/min and rotary separator suction speed of 4.4 m/s. In addition, the electrical power that can be generated at this time is still 60 W, so the installation and process need to be optimized again, especially for air supply to the reactor and syngas cleaning systems.

Keywords
tar reduction, municipal solid waste, rotary separator, air fuel ratio, downdraft gasifier

Topic
Mechanical Engineering

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

Corresponding Author
ega berman

Institutions
1) Departemen Pendidikan Teknik Mesin, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia.

(*) egatb[at]upi.edu

Abstract
The high cost of electricity rates has affected the demands of the public for the availability of energy-efficient air conditioning systems. This study aims to obtain data on improving performance of air conditioner using capillary tube in tube heat exchanger. Tests were carried out on a wall mounted split AC capacity of 9000 Btu which was modified using a heat exchanger with capillary tube in tube heat exchanger. The use of heat exchanger is intended to ease the work of the compressor so that it can reduce the electricity consumption needed. The expected results of this study are data parameters that indicate that the installation of heat exchanger can improve the energy efficiency of the AC system, so that it will affect the performance of the AC system and save energy.

Keywords
Air conditioner, heat exchanger, performance

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/Ry24GDUvEMKa

Corresponding Author
amay suherman

Institutions
1) Departemen Pendidikan Teknik Mesin, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No. 229 Bandung 40154, Indonesia

*) a_suherman[at]upi.edu

Abstract
The purpose of this study was to determine the increase in student learning achievement using competency-based modules. The study was conducted on the subject of Sistem dan Instalasi Refrigerasi with basic competencies examining the characteristics of refrigerants and lubricating oils. This study uses a quasi-experimental research method. Participants in this study were 60 vocational students in Bandung, with Study Program of Teknik Pendingin dan Tata Udara (TPTU). The research instrument used was a test, consisting of pre-test and post-test. Improved student achievement is analyzed using the concept of normalized gain (N-gain) based on pretest and posttest score data. The results are expected that the use of competency-based modules will significantly increase student learning achievement. So it has implications for student achievement above the kriteria ketuntasan minimum (KKM).

Keywords
Competency based module, learning achievement, students

Topic
Technical and Vocational Education

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

Corresponding Author
Hirawati Oemar

Institutions
Universitas Islam Bandung

Abstract
Entrepreneurial ability and competitiveness become interesting topics in regional economic development. The research aims to measure the effect of entrepreneurship on competitiveness. The research approach refers to the concept of competitiveness in Diamond Porter. Research using verification methods based on empirical surveys on the leather tanning industry in Garut, Indonesia. Data processing and statistical analysis with Partial Least Square algorithm. The results showed that the ability of Entrepreneurship had a significant effect in increasing competitiveness. Further research recommends that local governments support entrepreneurship development through infrastructure facilities and industrial raw material procurement policies.

Keywords
entrepreneurship, competitiveness, economic development

Topic
Industrial Engineering

Link: https://ifory.id/abstract/K8r9jka7ngqu

Corresponding Author
Riswandha Risang Aji

Institutions
Urban and Regional Planning UNISBA

Abstract
Environment is related to tourism as one of determinant to determine tourism destination competitiveness. Environmental determinants that can affect destination competitiveness are society, technology, culture, demographic, economy, geography, history, infrastructure, law, opponent, politics, and resources. This research aims to explain how environmental determinants take effect to destination competitiveness in Pentingsari tourism village. This research finds out that seven environmental determinants which are society, culture, economy, geography, infrastructure, opponent, and resources take effect on destination competitiveness by using nature and local value that live in Pentingsari tourism village. But some environmental determinants do not take effect in Pentingsari tourism village such as technology, demographic, history, law, and politics. Lack of nature relation is the main reason that five environmental determinants do not take effect on destination competitiveness. This research conclude that environmental determinants take effect to destination competitiveness in Pentingsari tourism village through seven determinants

Keywords
Environmental Determinants, Destination Competitiveness, Tourism, Village

Topic
Environmental Engineering

Link: https://ifory.id/abstract/DmtkEQpqZFy8

Corresponding Author
Astrie Kusuma Dewi

Institutions
a) Polytechnic of Energy and Mineral Akamigas
Jalan Gajah Mada no 38, Cepu, Blora, Jawa Tengah

Abstract
A heat exchanger, especially a shell-and-tube type, is a heat transfer mechanical device that is widely used in various industrial fields, such as oil, petrochemical, energy and so on. The function of a heat exchanger is to transfer heat from one fluid with a higher temperature to another fluid with a lower temperature. In this research, shell-and-tube heat exchanger was chosen because this type of heat exchanger is the most widely used in the industry in general and in the oil and gas industry in particular. This research was conducted to determine the performance of shell and tube type heat exchangers in terms of thermal and hydraulic. Data acquisition is done by observing in the field. So that the data processing and calculation results are obtained as follows: Shell side pressure drop of 19.73 psi has exceeded the minimum requirement of 10 psi, so it is time for cleaning, tube side pressure drop of 1 , 47 psi is still below the minimum requirement of 10 Psi, the effectiveness of the operation is 57.47% below the design value of 68.73%, and the simulation using excel-solver as follows in the gross condition can be increased to 79.93% effectiveness with a shell side pressure drop (6.2 psi), tube side pressure (9.98 psi) with shell side velocity (0.98 ft / s) and tube side (9.5 ft / s)

Keywords
Heat exchanger; Solver; Evaluation

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/L9MhEdCG62ev

Corresponding Author
Mohammad Abdul Khafid

Institutions
a) Department of Environmental Engineering, Faculty of Mineral Technology, Universitas Pembangunan Nasional Veteran Yogyakarta, Jl. SWK No.104, Condongcatur, Depok, Sleman, Daerah Istimewa Yogyakarta 55283, Indonesia
*aditya.wicaksono[at]upnyk.ac.id

Abstract
The rapid pace of population growth in coastal areas and increasing the need for natural tourism have a negative impact on the quality and quantity of natural resources and the environment in Sepanjang Beach. The phenomenon of seawater tidal waves led to a number of buildings along the beach experiencing heavy damage. The purpose of this research is to know the environment carrying capacity seen from the aspect of land capability and land suitability aspects as a tourist area, as well as providing recommendations that are right on Sepanjang Beach. The methods used are spatial analysis methods using geographic information systems (GIS) and scoring methods to determine the environment carrying capacity. The results of the calculation of the environment carrying capacity based on the aspect of land capability were obtained by 2 classes of land capability namely moderate and good. The results of the suitability of the beach recreation category shows if Tourism Suitability Index (TSI) has a value of 94% which means it is suitability for tourism. However, it is necessary to arrange the gazebo building to use upland land in the form of alluvial karst plain.

Keywords
Evaluation; Environment carrying capacity; Scoring; GIS; Tourism

Topic
Environmental Engineering

Link: https://ifory.id/abstract/rgmNwFfBtk7n

Corresponding Author
Ade Widya Septari

Institutions
Universitas Indonesia
*ade.widya[at]ui.ac.id

Abstract
The implementation of Knowledge Management (KM) is considered a sustainable approach to overcome challenges in the increasingly complex and competitive construction field. The construction industry needs to recognize the importance of KM as a strategic asset to improve organizational performance because employees knowledge, expertise and experience are the keys to organizational success. This is supported by the addition of discussion on KM in Chapter 4 Project Integration Management in the sixth edition of the Project Management Body of Knowledge (PMBOK® Guide) book in 2017. This study was conducted to evaluate the achievement of KM maturity level and determine the key success factors or critical success factors (CSF) of KM needed to improve the function of KM, which aims to improve organizational performance in State-Owned Enterprises (SOE) construction service sectors in Indonesia. The methodology used, initially by reviewing several journals to obtain knowledge factors used as indicators in identifying the maturity level of KM and CFS maturity. Then compile a questionnaire to collect data from respondents who are SOE construction service employees ranging from staff, middle, and top management. The data is then processed further with several analysis processes. The results of the study contain strategies that need to be developed to improve the function of KM in order to improve organizational performance in SOE construction service companies in Indonesia which is more effective and efficient.

Keywords
Knowledge Management, Maturity Level, Critical Success Factors, Organizational Performance, Construction Organization

Topic
Civil Engineering

Link: https://ifory.id/abstract/k3EJGFhVLDcC

Corresponding Author
Tukiran. Surbakti

Institutions
a)Staf BFTR-PTKRN-Batan
komplek Puspiptek GB 80 Tangerang Selatan
15342 Banten. Indonesia.

b) Staf Bidang operasi reaktor-PRSG-Batan
komplek pusiptek GB 30 Tangerang Selatan
15342 Banten. Indonesia

Abstract
The RSG-GAS reactor has entered its 32th year since first operating in 1987. For this reason, it is necessary to conduct a periodic safety review of all aspects of reactor operation in order to be able to provide sufficient data for decision makers as a material to put in place future operational plan policies, especially in order to ensure the safety of further operations up to the its designed age limit as well as to meet the provisions in the Regulations Head of BAPETEN N0. 2/2011, which requires to verify reactor safety at least in every 10 years. The purpose of this study was to determine the performance of the RSG-GAS reactor safety system which includes nuclear, thermo-hydraulics and radiation aspects, during the reactors 32 years of operation. Evaluation is carried out by collecting all reactor operating data for 32 years and then comparing with the limits and safety requirements of the reactor operation. Evaluation results indicate that the reactor is operating safely. During normal operation, the safety parameters are below the operating safety limits. In the event of failure and interruption of operation, the reactor protection system works well by turning off the reactor. The reactor can be operated for radio-isotope production and target irradiations for 32 years.

Keywords
reactor safety, RSG-GAS reactor, research reactor, safety analysis report

Topic
Research and Development in Engineering Education

Link: https://ifory.id/abstract/jDmW2LbYh9kA