Indonesia Conference Directory

Corresponding Author
Andrie Pasca Hendradewa

Institutions
Industrial Engineering Department, Faculty of Industrial Technology, Universitas Islam Indonesia, Yogyakarta Indonesia

Abstract
As a matter of fact, productivity improvement is a common objective which are faced by almost every industry. Lean manufacturing is one critical key of success to achieve productivity by increasing effectivity and efficiency of an industry. A manufacturer which annually produces piano in a huge capacity has a target to improve the ability to satisfy its high demand. As a solution to the problem, this study focused on lean manufacturing design, specifically on assembly unit department. This study conducted by utilizing two methods, Value Stream Mapping and Computer Simulation technique as a system approaching tool. According to the problem identification stage using Current State Mapping, the productivity level on assembly unit department is only 0.27 unit/person/hour, still at below level of the productivity target 0.36 unit/person/hour. The problem indicates that there was many possible production system matter, such as: production process input which was not utilized in an optimum way, workload distribution that was not well-managed, and operator ability that is under specification. By using computer simulation approach, this study suggested couple of alternatives to answer the productivity problem.

Keywords
productivity improvement, value stream mapping, computer simulation

Topic
Industrial Engineering

Link: https://ifory.id/abstract/PgTpemL3nKyk

Corresponding Author
M. Fariz Yasmin

Institutions
Department of Chemical Engineering, Faculty
of Industrial Technology, Institut Teknologi
Sepuluh Nopember, Sukolilo, Surabaya 60111 Indonesia

Abstract
Biodiesel is a promising alternative fuel to replace petrodiesel. Because biodiesel is renewable, non-toxic, biodegradable, has a low emission profile, and is environmentally friendly. However, the cost of producing biodiesel is higher than petrodiesel. Although biodiesel can be made from various raw materials including vegetable oil, animal fat, and used frying oil, mass production of biodiesel still uses processed vegetable oil. About 60 until 75 percent of the total cost of producing biodiesel comes from raw materials. Therefore, in this study used affordable raw materials, not food and abundant amounts of oil from rice bran. However, rice bran oil has a variety of impurities and the levels are quite high. In this study green solvent is used, namely deep eutectic solvent (DES from ChCl and Ethylene Glycol) and natural deep eutectic solvent (NADES from Betaine Monohydrate and Glycerol) to remove impurities contained in biodiesel from rice bran oil. This study aims to study the comparison of single-stage extraction (single extraction) and multi-stage extraction (multiple extraction) and the effect of stirring speed (laminar until turbulent condition) with DES and NADES solvents on the purity and yield of biodiesel produced. Hence, biodiesel obtained is meets Indonesia national standards (SNI 7182: 2015) with low production costs and is easy to apply on an industrial scale.

Keywords
biodiesel, rice bran oil, purification, Deep Eutectic Solvent, Natural Deep Eutectic Solvent

Topic
Chemical Engineering

Link: https://ifory.id/abstract/4hURLDWu8dzp

Corresponding Author
erwin erwin

Institutions
1 Mechanical Engineering, Universitas Sultan Ageng Tirtayasa, Cilegon, Indonesia.
2. Universitas Indonesia

Abstract
In a vertical hybrid turbine with a shaft bearing holder on one side, it has a shaft deflection problem that interferes with turbine performance. This study aims to improve the design of the turbine holder. The methodology used in this study is to analyze the deflection behavior of the turbine when rotating. Next in the turbine design review, and the result is to increase the distance of the shaft holder bearings and increase the bearing diameter in the triangular frame. Deflection testing with the help of a tracker software thats able to measure deflection distance in one field when the shaft rotates. The results of the deflection comparison before and after the design improvement show a significant deflection reduction.

Keywords
deflection, vertical wind turbine, tracker

Topic
Mechanical Engineering

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

Corresponding Author
Dandun Mahesa Prabowoputra

Institutions
1.Graduate School of Mechanical Engineering, Sebelas Maret University, Jl. Ir. Sutami 36 A, Central Java, Surakarta, 57126 Indonesia
2.Department of Mechanical Engineering, Sebelas Maret University, Jl. Ir. Sutami 36 A, Central Java, Surakarta, 57126 Indonesia
3.Department of Naval Architecture and Marine System Engineering, Pukyong National University,Busan 48513, South Korea

Abstract
Indonesia has a huge hydro energy potential, but the installation is still relatively small. This fact shows that hydro energy as a power plant still needs to be developed. Many studies concerning water turbines as supporting the development, one study on the performance of the turbine Savonius water. Simulation research is one way to accelerate the research process towards increasing the efficiency of the savonius water turbine. In this research, the effect of overlap ratio and number of blades on the performance of the water turbine savonius has been carried out. The study was carried out in a numerical analysis using computational fluid dynamic approach. The study began with a mesh independence study to obtain effective mesh. The research was simulated in 3 dimensions. Aspect Ratio used in this research is 1, with variations in the number of blades 2, 3 and 4. Variations used overlap ratio 0.1, 0.2 and 0.3. The factors that have been studied are TSR, Overlap Ratio, and Number of Blades. Where the influence of these factors was analyzed using the Factorial Design method

Keywords
Savonius Rotor, Water Turbine, CFD, Renewable Energy, Coefficient of Power, Factorial Design

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/4uTPMAEDCzB2

Corresponding Author
Erny Listijorini

Institutions
Department of Mechanical Engineering, Universitas Sultan Ageng Tirtayasa

Abstract
In Indonesia, biomass is the largest source of fuel compared to other countries in Asia, but its utilization is still below the Indian State. To improve the utilization of biomass fuel, this study conducted an experiment on the use of biomass gassification to reduce water content in the process of making sugar palm sugar with vaccum dryer technology. Based on the research that has been done before, this gassification furnace can produce a heat power of 5kW for husk raw materials with a ratio of biomass and the energy generated is 0.5kg of husk / 1 kWh. In this research, the performance of gas husk biomass gassification and costs will be tested.

Keywords
Gassification; Palm Sugar; Vacum Dryer

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/TMJHwjuLkhz7

Corresponding Author
Muhammad Haekal Habibie

Institutions
Pusat Riset dan Pengembangan SDM - Badan Standardisasi Nasional

Abstract
This research was conducted to discuss the application of risk-based thinking concept in calibration and testing laboratories. This research is motivated by the publication of the new edition of ISO/IEC 17025:2017 standard that applies the principle of risk-based thinking. From the results of the JCRB 39/3 resolution, full-implementation of ISO/IEC 17025:2017 standard by calibration and testing laboratories is no more than 3 years after publication. In addition, the National Accreditation Committee (KAN) as an accreditation body in Indonesia requires calibration laboratories and testing laboratories to switch their QMS to ISO/IEC 17025:2017 standard starting at 2018. This research is carried out by identifying the risks found in calibration and testing activity. Clause 8.5 of ISO/IEC 17025:2017 is applied to take actions to minimize or eliminate risks that have been identified as preventive or corrective actions. In this research, 5x5 risk matrix is also used by considering the impact and frequency of risks in the calibration and testing laboratories.

Keywords
ISO/IEC 17025:2017, risk, management system, laboratory

Topic
Industrial Engineering

Link: https://ifory.id/abstract/NZkCdh7p2YGa

Corresponding Author
Setiyo Gunawan

Institutions
Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya 60111, Indonesia
*Corresponding author:
Email: gunawan[at]chem-eng.its.ac.id
Tel: +62-31-5946240; Fax: +62-31-5999282

Abstract
Nyamplung (Calophyllum inophyllum) are widely spread in Indonesia and they are known to have many advantages. It has various benefits that can be utilized from root, stem, leaf, until seed. C inophyllum-s seed contains bioactive compound called calophyllolide. However, the utilization of C. inphyllum-s seed is still limited because they contain harmful toxins. So, C. inophyllum-s seed are generally used and investigated as a raw material of biodiesel. The aim of this research was to find the best condition to isolate calophyllolide, to know the yield of isolated calophyllolide and its purity percentage from crude C inophyllum oil. By far, the current research on calophyllolide is to extract the substance form C. inophyllum-s shell nut without further treatment on the shell nut. In this work, calophyllolide was separated from crude oil by silica gel adsorption and batchwise solvent extraction by using a mixture of hexane as non-polar solvent and methanol-water (9:1) as polar solvent. Liquid Liquid Extraction (LLE) was performed to purify the calophyllolide from polar liquid fraction produced from batchwise solvent extraction by mixture of hexane and ethyl acetate with solvent-PLF ratio 5:2. Ethyl acetate concentration in hexane used were 0%, 5%, and 9%. Each fraction obtained was tested qualitatively using Thin Layer Chromatography (TLC) and quantitatively using Gas Chromatography (GC) to analyze calophyllolide mixture. The best separation method were obtained by batchwise solvent extraction and 5% ethyl acetate with 67,94% purity level.

Keywords
adsorption, batchwise calophyllolide , Calophyllum inophyllum, silica gel, solvent extraction.

Topic
Chemical Engineering

Link: https://ifory.id/abstract/zW8LnE9R3Tck

Corresponding Author
Yudha Gusti Wibowo

Institutions
(a*) Postgraduate Student, Universitas Jambi
(b) Lecturer, Universitas Jambi

Abstract
Recent decades, we have problems with environmental damage such as soil polution, solid waste, wastewater, and air polution, environment have problems every single sector. Biochar created by coconut shell waste that dried for two days to remove water content than coconut shell waste burned with pan using unused firewood during four hours. This paper will explain about biochar production using a hundred percent waste material and the impact of biochar to environment. Biochar can solve the heavy metals and organic pollutants in soil, biochar application decreased the concentration of As, Cd, and Cu in maize shoots, which depended upon amount of biochar addition, pH values of soils, and ability of metal to adsorb on biochar, applied biochar for environment that give reducing global warming effect, acidification, eutrophication, ozone layer depletion, summer smog, winter smog, pesticides, airborne heavy metals, waterborne heavy metals, and carcinogenic substances, biological attributes of biochar related, biochar could reducing arsenic and heavy metals content underwater, status of nitrogen species and elements of potential toxicity in soils. Thus, this research will be acceptable for everyone and can solve the environmental problems.

Keywords
Biochar, environmental damage, wastewater, soil pollution, heavy metals

Topic
Chemical Engineering

Link: https://ifory.id/abstract/pPVxtz6LWyqu

Corresponding Author
Dwi Riana Aryani

Institutions
Universitas Indonesia

Abstract
The implementation of photovoltaic (PV) system has been evolving all over the world as the alternative energy sources are getting more required. However, the construction of PV power plant on the ground would need a large space. In regions which are lack of sites for the ground PV installation, a floating PV system is one of the solutions. This study analyses the performance of floating PV in supplying power to loads with a battery as the energy storage in a stand-alone system. The system is simulated using small capacities of PV module, battery, and load, where all components are integrated using a solar charge controller to maintain a safe operation. The performance of floating PV is compared to the ground PV in terms of the output efficiency. One can notice that the floating PV provides better efficiency compared to ground PV as the cell temperature is maintained well.

Keywords
Floating PV, stand-alone system, battery, output efficiency

Topic
Electrical Engineering

Link: https://ifory.id/abstract/uUNJDcRqp9BH

Corresponding Author
Ghefra Gaffara

Institutions
1 Civil Engineering Department, Faculty of Engineering, Universitas Indonesia, Depok, Indonesia 16424
2 Center for Sustainable Infrastructure Development, Faculty of Engineering, Universitas Indonesia, Depok, Indonesia 16424
3 Urban and Regional Planning, Faculty of Engineering, Esa Unggul University, Jakarta, Indonesia 11510

Abstract
The great potensial for Indonesia to grow rapidly due to the demographic factor later in 2045. These developments very closely related to economic growth. But, due to the fact that Indonesia is an archipelagic country, the division of development areas into six corridors, namely Sumatra, Java, Kalimantan, Sulawesi, Bali-Nusa Tenggara and Papua-Maluku Islands that has been implemented in the Masterplan for Acceleration and Expansion of Indonesia-s Economic Development (MP3EI) became the best solution. One of the most important factors that contribute to country-s economic growth, is the industrial sector support. To make an equitable that industrial development, it-s necessary to create a development theme in each corridor through several stages of analysis that generated 1) Sumatra as National Plantation and Processing Industry Corridor, 2) Java as Cyber Technology Innovation and Service Center Corridor, 3) Kalimantan as National Energy Reserves and Processing Corridor, 4) Sulawesi as National Aquaculture and Processing Industry Corridor, 5) Bali-Nusa Tenggara as National Ecotourism Center Corridor, 6) Papua-Maluku Islands as National Ore Mining and Processing Corridor. However, for sustainable industrial development, infrastructure development is needed as a development catalyst. To enlarge the impact of the industrys development on economic growth, it takes an unusual infrastructure. That is smart infrastructure that has some principal if applied in industrial sector, such as sustainable, integrated, smart energy and adaptive, that were designed by using benchmarking modification, that need investment cost.

Keywords
Corridor, Division, Economics, Growth, Smart Infrastructure

Topic
Civil Engineering

Link: https://ifory.id/abstract/YqJZKgEBXP89

Corresponding Author
Mikhail Vyacheslavovich Dolgopolov

Institutions
a) Samara University
b) Samara Polytech, Higher Mathematics Department
&
* TP A&ST
mikhaildolgopolov68[at]gmail.com

Abstract
The endotaxia is the process of growth of one crystal structure inside the volume of another. In this case we are talking about the formation of a film of silicon carbide in a silicon substrate. A silicon substrate is placed in the gas chamber. The sample is exposed to the stream of methane gas CH4 at temperature of 1360 - 1380 °C and at normal pressure. Moreover, gas contains both the stable carbon isotope C12 and the radioactive carbon isotope C14, and hydrogen H2 in the gas acts as a carrier of carbon. The process lasts up for 1 hour, during which methane molecules chemically react with sili-con atoms, forming silicon carbide and hydrogen: СН4 + Si → SiC + 2H2. As a result, a silicon carbide SiC film grows in the surface of the sample, and the hydrogen formed dur-ing the reaction leaves the sample and is of no further interest. As a result of the chemical reaction, the crystal lattice of the sample changes and, due to the different parameters of the Si and SiC lattices, defects are formed. The defects in the crystal lattice are various stable violations of the translational symmetry of a crystal. Such defects represent an empty lattice site, and thus are a so-called vacancy for other atoms. In fact, at temperatures above absolute zero, in a solid some of the lattice sites will always be empty, which means that vacancies in a solid will always exist. Carbon atoms, which are already part of the structure, can undergo self-diffusion and diffuse into the interior. What is more, an interstitial diffusion mechanism is distinguished, when an impurity atom moves from one internode to an empty neighboring one, and a vacancy mechanism, when an atom moves from one lattice site to the site where the vacancy is located. We consider a physical model that allows one to describe diffusion in a solid, which takes into account the vacancy mechanism of motion of impurity atoms, i.e. substitution mechanism.

Keywords
SOLID-PHASE DIFFUSION, BETA SOURCE

Topic
Materials Science

Link: https://ifory.id/abstract/P4rNn3uAF7Eb

Corresponding Author
Yunita Pujiastuti

Institutions
Institut Teknologi Sepuluh Nopember
Jalan Raya ITS, Surabaya, Indonesia

Abstract
Rice (oryza sativa) bran is a byproduct generated in the process of rice milling. Moreover, subcritical method as a promising alternative solvent for chemical reaction, separation and extraction process and its nontoxic, inexpensive and invorementally benign, to increase levulinic acid in subcritical needs to be studied with ethanol-water mixture. While, ethanol is capable of hydrogen bonding and dipole-dipole interaction with organic acid and it is conveniently available and stable for hydrogenation. At the same time, carbon dioxide was use as a pressurizing gas and the solvent etanol-water mixture with the concentration (0:100, 25:75, 50:50) with the temperature was used at 160, 180 and 200 0C for 20, 30, 40, 50 and 60 minute reaction in the reactor.

Keywords
levulinic acid, rice bran, subcritical method, hydrolisis, ethanol-water mixture

Topic
Chemical Engineering

Link: https://ifory.id/abstract/4AFD2QzUnkcC

Corresponding Author
Dwi Riana Aryani

Institutions
Universitas Indonesia

Abstract
Loss of 500 kV transmission line of Paiton-Grati 1 & 2 causes voltage instability in surrounding subsystem which may lead to further disturbance in the Jawa-Bali system. Minimization of the voltage instability can be handled by adding Flexible AC Transmission System (FACTS) devices, such as Static Synchronous Compensator (STATCOM) and Static Synchronous Series Compensator (SSSC). STATCOM and SSSC have the capability of dynamically controlling the power flow through a line. This paper aims to compare the performance of both devices to maintain system stability in the case of loss of 500kV transmission line. The performance of these methods is compared through the analysis of the bus voltage, the active power, and the rotor angle. As a result, this paper shows that the implementation of STATCOM is more stable instead of SSSC.

Keywords
FACTS, Instability, SSSC, STATCOM

Topic
Electrical Engineering

Link: https://ifory.id/abstract/bqKT2kPjGMr7

Corresponding Author
Woelandari Fathonah

Institutions
a) Civil Engineering Departement, Faculty of Engineering, University of Sultan Ageng Tirtayasa, Cilegon, 42435, Indonesia
*woelandari[at]untirta.ac.id

Abstract
Expansive soils have low soil bearing capacity so thats causes problems in buildings. One ways to repair soil bearing capacity is improve the strength of original soil with chemical stabilization methods using slag and fly ash. The research goals were to find out the effect of adding slag and fly ash with reference to unconfined compressive strength value and physical properties of the soil before and after stabilizing with slag (10%, 20% and 30%) and fly ash (20%) and to know classification soil on jalan Kadusentar, Pandeglang District - Banten based on USCS classification. The results of this study obtained original soil types including the MH category is non-organic clay with high plasticity. The UCT value of original soil was 1,407 kg/cm2. Addition of slag and fly ash increased the value of unconfined compressive strength and can improve the physical properties of the soil by decreasing the value soil plasticity index. The maximum UCT value is the percentage of 20% fly ash and 10% slag of 8,393 kg/cm2 including hard consistency with unconfined compressive strength values greater than 4 kg /cm2 with curing time for 14 days.

Keywords
Clay, Stabilization, Slag, Fly Ash, UCT

Topic
Civil Engineering

Link: https://ifory.id/abstract/4jqQ3TYXxJhZ

Corresponding Author
I WAYAN SUTAPA

Institutions
UNIVERSITY OF TADULAKO

Abstract
In the Mamak River, there is the Mamak Dam which functions as flood control, micro hydro power plants, irrigation, fisheries and tourist attractions. However, flooding is still common in the Mamak River. The purpose of this study was to determine the effectiveness of the Mamak Dam in controlling the volume of flooding that enters and the capacity of the Mamak River to deliver the design flood. The investigation was carried out with a survey at the study site and collected secondary data in the form of a design flood, a longitudinal and cross section profile of the Mamak River, capacity curve and equation of discharge at the overflow of the Mamak Dam. The methodology carried out was in the form of routing floods through reservoir by routing floods through the level pool routing. The profile of the Mamak River uses unsteady flow with the of HECRAS 4.1 software. The conclusions from this study are: 1). Mamak Dam can extend the peak flood time from 5 to 6 hours to 10 to 12 hours; reducing the flood of Mamak Dam between 107.51 m3 / s to 232.96 m3 / s or equivalent to 60.44% to 41.75% according to the return period of the flood discharge. 2). The flood discharge that comes from the overflow of the Mamak Dam is not able to be fully flowed by the Mamak River resulting in flooding, both annual flooding and for 25 years return period. 3). To overcome this flood, the flood dikes planned to vary in height from 0.81 m to 3.2 m

Keywords
Flood routing; HECRAS 4.1; Mamak Dam; Mamak River

Topic
Civil Engineering

Link: https://ifory.id/abstract/vAKmf2nXQM4k

Corresponding Author
Femy Sanana Sanvia

Institutions
a) Electricity and Energy Management, Department of Electrical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia
*femysanana[at]gmail.com
b) Department of Electrical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia

Abstract
The Industrial and Commercial sectors are the largest electricity energy consumption. Building-s system that used the biggest electrical energy consumption, especially in the Industrial and commercial sectors, are air conditioning systems, lighting systems, and building transportation systems. Energy Saving Performance Contract (ESPC) could be an alternative to support implementation of energy efficiency in the building sector up to 10-30%. This study investigates the application of ESPC in the retrofit of the air conditioning system in Industrial and Commercial building, Chiller. Chiller retrofit can produce electrical energy efficiency of 210 MWh / year or reduce electrical energy consumption by up to 30% with a 5-year payback period investment. This study can be broadened to develop application of ESPC in Indonesia.

Keywords
Energy Saving Performance Contract; Retrofit; Energy Efficiency

Topic
Electrical Engineering

Link: https://ifory.id/abstract/hN6p4yurRLdq

Corresponding Author
Callista Fatima Larasati

Institutions
(1) Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Depok, 16424, Indonesia
(2) Department of Metallurgy and Material Engineering, Faculty of Engineering, Universitas Indonesia, Depok, 16424, Indonesia
(a)sugeng[at]eng.ui.ac.id, (b)callista.fatima[at]ui.ac.id, (c)nurul.ilmaniar[at]ui.ac.id, (d)suharno[at]metal.ui.ac.id

Abstract
Osseointegration is a process consisting of the formation of bone tissue on the implant surface, so that the osseointegration process occurs, a surface with surface roughness (Ra) is required in isotropic microtopography with a size of 1-100 nm. The plasma treatment can be done to reach the Ra parameter. This study aims to discuss the treatment of Plasma Electrolytic Process (PEP) with the principle of physiochemical erosion using electrolytic cells on Ti-6Al-4V alloy implants, to form a plasma layer in the form of spark discharge and Vapour Gas Envelope (VGE). Samples made of Ti-6Al-4V are tested with several parameters including different electrolytes and different applied voltages are investigated, and the results of the formation of VGE which influences the surface characterization are evaluated. The results show that the process of PeP with electrolyte consist of 50% H3PO4 + 10% NaClO4 + 1% HF and 10% ethylene glycol + 2% NH4F at a voltage of 90-130 V produces VGE and non- homogeneous spark discharge resulting in a surface with microporous structures with increasing surface roughness and micro-hardness indicating the formation of an oxide layer.

Keywords
Plasma Electrolysis Process; Surface Roughness; Ti-6Al-4V Implant; Osseointegration

Topic
Materials Science

Link: https://ifory.id/abstract/m4Yb8pQWdgu2

Corresponding Author
I Ketut Adi Atmika

Institutions
(a) Mechanical Engineering Departement, Udayana University, Bali-Indonesia 80362
(b) Mechanical Engineering Departement, Institut of Sepuluh Nopember, Surabaya-Indonesia 60117

Abstract
One of the failure factors in braking is the loss of the ability of brake lining material to the braking process. The quality of brake lining depends on several factors, namely the composition of the material, type of material and hardness. Brake pads is one component in the braking system that is directly in contact or rubbing against the rotating part in this case the drum (drum system) or disk (disc system). The ability of brake pads has an important role, namely to absorb the amount of kinetic energy during braking. In general, brake pads are made of asbestos material because they are superior in temperature resistance up to 800˚C, but asbestos materials have carcinogenic properties that have a negative impact on the environment and human health. This research was developed to answer these problems, namely to look for alternative brake pads that have good toughness and structural properties and do not interfere with the health of the vehicle driver or are environmentally friendly. Brake pad materials are made from hybrid composites reinforced with basalt, shellfish, alumina and bound using phenolic resin polymer (PR-51510i). This brake pad materials is produced through a sintering process with an emphasis of 2000 kg for 30 minutes at a fixed temperature of 150 °C. This composite was made as many as five variations, each of which tested its strength using the charpy impact test according to ASTM D 6110 standard. The strength of the average brake pad specimens obtained was 0,0003327 J/mm², better than the average toughness of brake linings from asbestos ingredients

Keywords
Environmentally friendly, Hybrid Composite, Basalt, Shellfish, Alumina.

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/hUGPY73CjXer

Corresponding Author
Dwi Riana Aryani

Institutions
Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia

Abstract
Photovoltaic (PV) is known as an intermittent energy source so that the impacts need to be calculated by the developer. In order to ensure the presence of PV does not cause the reliability of the system interrupted, developers are required to perform the stability study before the integration. In this paper, voltage stability study is done by using various PV capacities ranging from 5 MWp to 15 MWp in systems with a capable capacity of 90.79 MW using software ETAP 12.6.0. PV generation is set at the maximum site irradiance where power drop due to weather condition. The analysis shows the system stabilized in less than 50 seconds where the voltage disturbance does not exceed 10% for PV with a capacity of 5 and 10 MWp which is connected to a distribution network. Meanwhile, PV with a capacity of 15 MWp requires load release in order to regain stability.

Keywords
Integration, Lombok, photovoltaic, voltage stability.

Topic
Electrical Engineering

Link: https://ifory.id/abstract/h3MbNZcpVr8u

Corresponding Author
Novaldi Dwiputra Prihadi

Institutions
Industrial Engineering, School of Industrial Engineering, Telkom University, Bandung, Indonesia

Abstract
Increased sales in the automotive sector every year, forcing supporting companies to support their production activities. Increased productivity, the potential risks also arise that arise and give a negative impact on the company, one of which is rubber industry, as a supporting company. One area that is very vulnerable to risk is the supply chain scope. The complexity of the supply chain structure that involves many parties is very vulnerable to the emergence of potential risks and becomes a challenge in managing them. Therefore, risk management and proactive actions in the supply chain are needed to minimize the losses that will occur. The model that is suitable in overcoming this problem is House of Risk (HOR). The HOR model is divided into two stages. HOR1 is used to identify and rank each identified risk agent. HOR2 is used to prioritize proactive actions that must be applied by companies with selected risk agents at HOR1. In this case, there are 9 proactive actions that are prioritized in overcoming the identified risk agent.

Keywords
risk management, supply chain, manufacturing, house of risk, proactive actions

Topic
Industrial Engineering

Link: https://ifory.id/abstract/ekbjf3awLUcx

Corresponding Author
Nufus Kanani

Institutions
Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jalan Jendral Sudirman Km. 03, Kotabumi, Kec. Purwakarta, Kota Cilegon, Banten 42435
*nufus.kanani[at]untirta.ac.id

Abstract
Recently, drug nanoparticles formulation using Poly Lactic Acid-Cellulose nanocrystal (PLA-CNC) have been introduced. PLA-CNC were prepared by emulsion method for antidiabetic drug delivery applications. PLA is one of polymer which potentially used as raw material of drug delivery because it has the ability to bind and carry drugs into cell target, but the hydrophilic character of PLA cause the degradation of PLA in the body run slowly, so it is necessary combining PLA with CNC to improve its property. In this study, special attention has been given to the modification of PLA-CNC as a drug delivery matrix to obtain the optimum drug release of antidiabetic drugs. The combination of chemical PLA-CNC matrixs were characterized using FTIR and SEM, its drug loading capacity, encapsulation efficiency and in vitro drug release behavior was determined by using UV spectrophotometer.

Keywords
PLA, CNC, Drug delivery, Matrix

Topic
Chemical Engineering

Link: https://ifory.id/abstract/QvgKZ9rpJXWL

Corresponding Author
Hans Kristianto

Institutions
a) Department of Chemical Engineering, Industrial Technology Faculty, Parahyangan Catholic University, Ciumbuleuit 94, Bandung 40141, West Java, Indonesia

b) Department of Chemical Engineering, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, West Java, Indonesia

Abstract
In this study we utilize salacca peel as a precursor to synthesis activated carbon (AC) using hydrothermal carbonization (HTC) and microwave assisted chemical activation method. The HTC was done at 225°C, 50 bar for 5 h using citric acid as a catalyst. The obtained hydrochar was furthermore impregnated using KOH as activating agent at various hydrochar to KOH mass ratio (1:2, 1:3, and 1:4). The activation was done by under microwave radiation of 700 Watt for 5 min. The obtained activated carbons were characterized using scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and methylene blue adsorption. The best activated carbon (1:4) was furthermore tested as nickel ion-s capacitor. The electrochemical characteristics (cyclic voltammetry) were measured by using half-cell test pouch with nickel oxide as reference electrode and 6 M KOH as electrolyte. The results obtained showed that activated carbon from salacca peel gave better performance compared to commercial activated carbon.

Keywords
activated carbon; chemical activation; hydrothermal carbonization; supercapacitor

Topic
Chemical Engineering

Link: https://ifory.id/abstract/4xpGn9qkf6JC

Corresponding Author
Gatot Trimulyadi Rekso

Institutions
Center for Application of Isotopes and Radiation- National Nuclear Energy Agency, 49 Lebak Bulus Raya Street , South Jakarta, Indonesia
Corresponding author; e-mail; gatot2811[at]yahoo.com, Fax: +62-21-.7513270

Abstract
Abstract. Colloidal Silver Nanoparticles were synthesized by Gamma ray irradiation in aqueous lactic acid solution containing chitosan as stabilizer. The aim of this research is to know the effect of irradiation dose and concentration of chitosan in the formation of Nano-silver. Silver Nitrate of 2 mM is dissolve in the chitosan solution. The effect of chitosan concentration which varied 0,.3%, 0. 5%, and 0. 7%(b/v) were irradiated with gamma ray at dose of 5, 10 and 15 kGy. The formed of silver Nano were identified using UV –Vis spectrophotometer, particle size analyzer (PSA) and FTIR. The result shows, the concentration of chitosan (0.3 – 0,7%) in the irradiated solution also considerably affected the silver Nano particles size which decreased with increasing of irradiation dose. Due to the unique features of the processing procedures, thus Co-60 ray irradiation has been considered as a suitable method for synthesis of colloidal silver nanoparticles.

Keywords
Keywords : Nano particle, irradiation, nano silver, chitosan, lactic acid

Topic
Materials Science

Link: https://ifory.id/abstract/ReyAaPKwL8xX

Corresponding Author
Rudi Hartono

Institutions
Universitas Indonesia, Universitas Sultan Ageng Tirtayasa

Abstract
Organic ion exchange resins as heterogeneous acid catalysts that use oil nyamplung to produce biol.diesel. It was performed at various temperature and time to get optimum condision for making biodiesel. These heterogeneous catalysts is environmentally friendly and easily separated and can be reused. The molar ratio of use oil nyamplung and methanol (1:7) was used is esterification. The yields of biodiesel at various optimum temperatures and times were : 93 % ( 5 M HCl), 87% (6M HCl) dan 85% (7M HCl). Biodiesel results were analyzed by GC Ester content and modified catalysts were characterized using FTIR, XRD SEM-EDX and BET

Keywords
Katalis Heterogen, Oil Nyamplung, Katalis Resin Penukar Ion, Diaion PK 208 LH

Topic
Chemical Engineering

Link: https://ifory.id/abstract/EAzdCPkjG946

Corresponding Author
Bayu Kusuma

Institutions
a) Post Graduate Student School of Civil and Environmental Engineering, Institute of Technology Bandung, Indonesia
*bayukusuma[at]students.itb.ac.id
b) Faculty of Civil and Environmental Engineering, Institute of Technology Bandung, Indonesia
c) Faculty of School of Architecture, Planning and Policy Development, Institute of Technology Bandung, Indonesia

Abstract
The role of construction activities in national development is very important as its contribution to the economic growth in Indonesia. The contractor, as the actor who manages large amounts of construction activities resources has an important role to play. In line with Indonesia increasing construction capitalization, it indicates that the ability of Indonesian contractors needs to develop, especially the technological capability to deal with existing dynamics. This study investigates how contractors place technological capabilities as an important part of their corporate strategy in facing the dynamics of the construction industry so that corporate performance can be achieved. This will involve the development of technological capabilities where contractors conduct technological learning (exploration, acquisition, internalization) so that their technological capabilities increase. The investigation focused on medium contractors and data were collected through the questioner survey. The results of the survey are used to mapping the development of technological capabilities carried out by contractors. This study found that medium contractor did not place the development of technological capabilities as a strategic part of the company. The results of these discussions are expected to provide benefits in helping the regulator and construction companies in Indonesia to improve the performance of construction industry.

Keywords
Contractor, Technological Capabilitiy, Indonesia

Topic
Civil Engineering

Link: https://ifory.id/abstract/wGM9dfrNAFxP

Corresponding Author
Masjudin Masjudin

Institutions
Department of Electrical Engineering, Sultan Ageng Tirtayasa University

Abstract
Final project is a prerequisite that must be taken by students to get a Bachelor or Master degree. Final project contains the results of research made in a specific format as reporting the research process to the institution. Each institution has a standard format for the final project or thesis writing rules which are usually written in the instructions for writing a thesis. Institutions usually provide writing templates to follow, but because the templates only make a number of important parts and are still manual, the format of student skiry writing often changes and is not uniform with other students or some are deviant and not in accordance with the standard written format. This study designed a text editor application to help students or researchers so that it was not too problematic in the writing format. This application is based on a graphical user interface, making it easier to operate. the rules in the program are made to automate the writing entered to produce written output in accordance with the format specified by the institution. With this system, student or researcher will be easier in writing the script according to the standard of writing and get a final project or thesis report in a uniform format.

Keywords
Aplication, text editor, standard format, java programs

Topic
Computer Engineering

Link: https://ifory.id/abstract/N9PEkcFhKWrb

Corresponding Author
Nyoman Budiartha Raka Mandi

Institutions
Department of Civil Engineering, Faculty of Engineering, Udayana University.
Kampus Bukit Jimbaran, Badung 80361, Bali, Indonesia

Abstract
Bali island has several ports, and three of them are used ships- layover. Those ports are: Benoa port in the southern of the island, Celukan Bawang port in the northern part, and Padangbai/Tanah Ampo port in the eastern part; with most of tourism activities are concentrated in the southern part. Disadvantageous management and competition between those ports raised the question and challenge for the cruise port and its nearest vicinity. A cooperation is required to enable those ports to compete more effectively, in attracting tourists and supporting the island-s tourism destination development. This study employed a set of semi-structured interviews (SSI) and the spot field observation in assessing the port-s management for tourism destination-s development. The result of this study is expected to contribute in providing useful information for tourism destination development and for the industry itself, which are constantly growing and attractive for international tourists.

Keywords
cruise port, management and competition, cooperation, tourism destination development

Topic
Civil Engineering

Link: https://ifory.id/abstract/Thu8vMBKUzR9

Corresponding Author
Adinda Dita Dwi Lestari

Institutions
a) Metallurgy and Materials Engineering, Universitas Indonesia, Jalan Kampus UI, Depok 16424, Indonesia
*adinda.dita[at]ui.ac.id
b) Metallurgy and Materials Engineering, Universitas Indonesia, Jalan Kampus UI, Depok 16424, Indonesia
*anne[at]metal.ui.ac.id

Abstract
The fabrication and research of Aluminum AC4B matrix composites with the addition of Boron Carbide (B4C) reinforce was carried out with the aim of knowing its mechanical properties difference due to its toughness, good impact resistance, and high strength properties. In this fabrication and research, Aluminum AC4B act as the matrix in the composites which is given a variation of B4C reinforcement particle of 1 ; 3 ; 5 %Vf and also followed by the addition of 5 %wt Magnesium (Mg) as the wetting agent, 0.04 %wt Stronsium (Sr) as the modifier, and 0.15 %wt Al-5Ti-1B as the grain reinforcement through the stir casting process. To characterize each composites, two types of testing methods are carried out namely the destructive testing (such as tensile, hardness, impact, and ballistic testing) and the non-destructive testing (such as porosity and density, Optical Microscope (OM), Scanning Electron Microscope (SEM) and Dispersive X-Ray Spectroscopy (EDX), and X-Ray Diffraction (XRD) testing). The mechanical properties difference of each composite is related to the interface bond between the matrix and the reinforcement added to the composites as the use of B4C reinforcement particle increase, so that it could produce high toughness, impact resistance, and strength.

Keywords
Aluminum composites; Boron carbide; AC4B; Stir casting

Topic
Metallurgy Engineering

Link: https://ifory.id/abstract/x8GzJXh2pgYw

Corresponding Author
Prima Denny Sentia

Institutions
a) Industrial Engineering, Universitas Syiah Kuala, Jl. Tgk Abdur Rauf No.7, Banda Aceh 23111, Indonesia
b) Laboratory of Industrial Computation and Optimization, Industrial Engineering, Universitas Syiah Kuala, Jl. Tgk Abdur Rauf No.7, Banda Aceh 23111, Indonesia
*primadennysentia[at]unsyiah.ac.id

Abstract
Frozen tuna is a perishable product that sensitive to temperature changing, therefore a good cold chain system is needed. As a part of the supply chain, Cold chain system aims to maintain the temperature of the product in order to keep its quality from upstream to downstream. There are various problems encounter the cold chain process that effected to the streamline. In consequence, it is important to build a continuous improvement to reduce the risk in the cold chain. The aims of this research are to discover the risk that can be found on the cold chain process, what is the causes, and the connection between both risks and its causes. This matter to develop risk management system on frozen tuna products in Acheh. This research using House of Risk (HOS) method to capture the most critical risk and risk management system is carried out Fuzzy Inference System (FIS) by Mamdani approach. The expected result from this research is an alternative design and recommendation to solve the risk, so that strategy could be applied on the companies.

Keywords
Cold Chain, Risk Management, House of Risk (HOR), Fuzzy Logic

Topic
Industrial Engineering

Link: https://ifory.id/abstract/pX6wRNrnFqyf

Corresponding Author
Punnatorn Mathong

Institutions
Supply Chain and Logistics System Research Unit, Department of Industrial Engineering, Faculty of Engineering, Khon Kean University, Khon Kaen 40002, Thailand

Abstract
The assessment of service quality has received intensive attention over the past few decades. Many tools have been proposed for being used to quantify the level of service quality. SERVQUAL, which divides the term “service quality” into five dimensions (Tangibles, Responsiveness, Reliability, Assurance, and Empathy), is one of the most commonly used tools. However, SERVQUAL is not designed to be instantly implementable in every industry or business sector, but question items belonging to each dimension need to be adjusted to suit their specific characteristics. This study aims to develop the assessment tool, based upon SERVQUAL, particularly for the beverage transportation service. The process started by gathering assessment items from relevant literature. The selected items were modified to suit the beverage logistics industry, and they were then classified into the five dimensions. After that, the validity of the items was confirmed by asking three industry experts to check whether the questions were appropriate and understandable for customers. Next, six experts were asked to provide Item-Objective Congruence (IOC) scores for quantitative validity testing. Subsequently, the adjusted questionnaire was distributed to 29 samples in order to test its reliability, through the Cronbach-s alpha values. The final version of the questionnaire can be used as an effective tool for assessing the quality of service for beverage transportation service providers.

Keywords
Service quality assessment; SERVQUAL; Logistic service provider; Beverage transportation; IOC method

Topic
Industrial Engineering

Link: https://ifory.id/abstract/6w4kMqDnUEgz