Indonesia Conference Directory

Corresponding Author
Henry Wicaksana

Institutions
Departement of Chemical Engineering, Faculty Technology of Industry, Institut Teknologi Sepuluh Nopember Surabaya, Jl. Arief Rahman Hakim, Surabaya 60111, Indonesia
*onramus[at]chem-eng.its.ac.id

Abstract
In petroleum refining processes, such as naphtha hydrotreater (NHT) unit, catalysts are important components to improve the yield of high-quality product. These catalysts are susceptible to inactivation caused by adsorption of sulphur (S) and by metals impurities, such as iron (Fe) and arsenic (As) from the process in a certain time. But the replacement of deactivated catalyst requires a large cost, so the regeneration of catalysts can be an alternative to reduce these costs. And ultrasound is an effective method for regenerating catalysts because the operating conditions and solvents are more environmentally friendly. The effect of ultrasound temperature and presence of citric acid on impurities removal of spent catalyst NiMo was investigated in this study. The mixture of the spent catalyst and 1% citric acid (1/20 (w/v)) was treated by ultrasound at 20% amplitude, 20 minutes and various temperature (30–70°C). After process, solid product was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Fluorescence (XRF). The liquid product was analyzed with Atomic Absorption Spectroscopy (AAS). The content of S was decreased after ultrasound (from 17.3% to 3.8%). The optimum condition was achieved at 50°C and 20 min. Based on AAS analysis which showed Fe composition 73,20 ppm.

Keywords
Citric acid, Deactivation, Regeneration, Spent catalyst, Ultrasound

Topic
Materials Science

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

Corresponding Author
Rocky Alfanz

Institutions
Graduate School of Science and Technology, Kumamoto Univuniversity

Abstract
Recently more attention on the failure of PV systems has been paid and more reports have been found in PV related papers. Various methods to detect failure of PV module have been developed; They are visual method, I-V characteristic method, electroluminescence (EL) method, UV fluorescence method, signal transmission method, IR thermography method, photoluminescence (PL) method. However, each method has some limitations. Developing a new alternative diagnostic method of PV cells will be required for efficient operation of PV system. We have been developing a new method for detecting failures in PV cells and modules by measuring magnetic flux density at the surface of PV cells generated by currents in busbars and a cell. The proposed method uses μ-tesla magnetic sensor (MI-CB-1DM) to detect failure in a PV cell. The experimental design carried out in this study covered two stages. In the first stage, we developed a method for detecting faults in PV cells using the μ-tesla magnetic sensor method. In this second stage a calculation will be made to determine the current level due to the failure of the PV cell. The results show that Bx at the lower busbar in the degraded module has smaller magnetic density than the upper busbar. No obvious difference can be seen in the Bx and By profiles between the normal and degraded cells.

Keywords
Photovoltaic, magnetic sensor, Failure PV module, current busbar

Topic
Electrical Engineering

Link: https://ifory.id/abstract/hWutVY4n38ND

Corresponding Author
Rosada Naulina

Institutions
Institute Technology of Sepuluh Nopember

Abstract
Intensification of biodiesel and other chemical products (ethyl levulinate) from rice bran using in-situ transesterication method without catalyst in subcritical ethanol – water has been investigated. This method known to be economical because the experiment steps are reduce and environmentally friendly because we no use a catalyst. Then, the method found to be unaffected in Free Fatty Acid (FFA) contents in rice bran and moisture, so that pretreatment was no required. In this experiment used CO2 as a pressure gas and ethyl acetate as co- solvent for increasing the yield. This reactor is equipped with a stirrer used a magnetic stirrer of rice bran, a mixture of water, ethanol and ethyl acetate in mol ratio 1: 10: 9: 2 and was inserted into the reactor, then injects CO2 gas to increase the pressure and to ensure the reaction occurs under subcritical conditions under an operating pressure of 80 bar. Temperature (120 – 200ᵒC) and reaction time (30 minute - 4 hours) were investigated to increase yield biodiesel and chemicals. It has been known that a longer time affects the increase in the yield of biodiesel chemicals followed by an increase in reaction temperature (200ᵒC).

Keywords
rice bran; biodiesel; subcritical

Topic
Chemical Engineering

Link: https://ifory.id/abstract/xtU2uvy3TPH4

Corresponding Author
Nurul Ilmi

Institutions
Department of Industrial Engineering, Faculty of Indutrial Technology, Sepuluh Nopember Institute of Technology, Surabaya 60111, Indonesia
*nurulilmi136[at]gmail.com

Abstract
A total of 15.72% of the elderly in Indonesia are currently connected to the internet. Nowadays, elderly start using applications such as Gojek and Grab to meet their daily needs. However, the interface design by its application does not support the limitations of the elderly. There are many elderly people who have difficulty in using the applications that exist today. This study aims to design an application interface that is suitable for the elderly using eye tracker technology. Eye tracker is a tool that is capable of recording data where the human pupils are focused, recording the interests and interests of users so that they can provide accurate analysis in designing the interface design of an application. Respondents in this study were young elderly with a age range of 60-69 years. The experimental design in this study was that the elderly were asked to order Go-Car services in the GoJek application and recorded using Tobii Eye Tracker. The results of this study can be a reference recommendation for creative industries that want to make the elderly as their market segmentation.

Keywords
Elderly,Gojek Aplication, Eye tracker technology

Topic
Industrial Engineering

Link: https://ifory.id/abstract/Yf8c3gZzhNV4

Corresponding Author
Dwi utari surya

Institutions
a) Department of Electrical Engineering, Brawijaya University
Jalan Veteran, Malang, 65145, Indonesia
dwiutarisurya[at]student.ub.ac.id
b) Department of Electrical Engineering, Brawijaya University
Jalan Veteran, Malang, 65145, Indonesia
ponco[at]ub.ac.id
b) Department of Electrical Engineering, Brawijaya University
Jalan Veteran, Malang, 65145, Indonesia

Abstract
Emotion is one of the advantages given by God to human beings compared to other living creatures. Emotions have an important role in human life. Many studies have been conducted to recognize human emotions using physiological measurements, one of which is Electroencephalograph (EEG). However, the previous researches have not discussed the types of wavelet families that have the best performance and canals that are optimal in the introduction of human emotions. In this paper, the power features of several types of wavelet families namely daubechies, symlets, and coiflets with the Correlation Feature Selection (CFS) method to select the best features of alpha, beta, gamma and tetha frequencies. According to the results, coiflet is a method of the wavelet family that has the best accuracy value in emotional recognition. The use of the CFS feature selection can improve the accuracy of the results from 81% to 93%, and the five most dominant channels in the power features of alpha and gamma band are T8, T7, C5, CP5, and TP7. Hence, it can be concluded that the temporal of the left brain is more dominant in the recognition of human emotions.

Keywords
Electroencephalograph; wavelet family; Correlation Feature Selection (CFS)

Topic
Electrical Engineering

Link: https://ifory.id/abstract/nCK7qGtWfeLk

Corresponding Author
wiyono slamet

Institutions
Universtas Sultan AgengTirtayasa

Abstract
Sultan wind turbine v.5 is a vertical axis wind turbine with a combination of savonius and darrieus types. This wind turbine is the development of previous wind turbine studies. To find out the value of the moment of inertia coefficient and the value of moment inertia rotor sultan wind turbine v.5 the experiment was carried out using an inclined plane. Rigid objects that roll do a combination of two movements at once namely translational motion and rotational motion. Inertia moments of rigid bodies are generally formulated as I = kMR2 where k is the coefficient of moment inertia. In this experiment, the object used is the right and left rotor of the sultan wind turbine v.5. Data collection is done by video recording when the rotor rolls on the inclined plane. The videos are analyzed using tracker software. The motion on the rotor in the videos subsequently tracked to produce position and time data. The tracking method are in two ways, namely auto-tracking and manual tracking. The tracking data is made into a graph resulting in a linear velocity relationship with time. Those graph are analyzed which produces the A gradient value. From the results of calculations and data analysis, the coefficient of mement inertia right rotor is 4.36 and the left rotor is 4.677. The calculation value of the inertia moment right rotor is 2.26 Kgm2 and the left rotor is 2.42 Kgm2.

Keywords
Sultan wind turbine, moment inertia of rotor, tracking methode

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/Fkv3Y9LMAdPn

Corresponding Author
Dadang Iskandar

Institutions
Universitas Indonesia

Abstract
One of the things that cause rapid destruction the pavement that is due to lack of maintenance of the road drainage system. Road drainage system serves to dry the pavement or water flow in order as quickly as possible out of the road surface and then flowed through the channel next to the final disposal. Road deterioration will interfere with the comfort and safety of the vehicle and affects the performance and quality of the pavement structure. Pavement condition index (PCI) is one of the pavement performance assessment methods used to evaluate the condition of the pavement. This research is aimed to identify and analyze the shape of influence of drainage conditions to damage the road surface pavement structures PCI method with the territory of reviews Jakarta Province. The method used is a field research with primary data in the form of survey of road damage that will be evaluated by the method of PCI and carried out analysis of the effect of drainage analysis method experimental design factorial of the components of the condition of drainage channels, the existence of the water surface pavement, and the value of PCI as the value of damage pavement. Based on the research results obtained using Design of Experiments main factors that greatly influence the surface damage is a factor pavement drainage channel conditions and then factor the value of PCI and the last is a factor of the condition of the surface water. The entire region of reviews is dominated by the value of PCI "good" and the type of maintenance that dominates is "routine maintenance".

Keywords
Road deterioration, drainage, surface water, PCI, factorial analysis

Topic
Civil Engineering

Link: https://ifory.id/abstract/6E2t4vkeHydP

Corresponding Author
Jamila Rahmoun

Institutions
a) Université Polytechnique Hauts-de-France
Campus Mont Houy, 59313 Valenciennes cedex 9, France
b) Université de Lille, Faculté de Médecine
1 place de Verdun, 59045 Lille cedex, France

Abstract
Understanding the physical mechanisms of bone fracture represents a major challenge in biomechanics, since it allows the enhancement of injury criteria commonly used by Euro NCAP benchmarks for the safety of passenger cars or pedestrians. It can also deliver a follow up of athlete-s safety during their trainers avoiding risk zones of injury especially in contact sports. This knowledge is essentially based on the use of the numerical models, whose prediction is assessed through the development of high resolution medical imaging and simulation softwares. Among these models, the anthropometric test device (ATD) commonly used for crash-test or other more detailed local models simulating the interaction between bone tissue and clinical equipment such as prostheses. Their advantage lies mainly in the diversity of configurations and loading conditions and hence the optimization of time and the total benchmark cost. However, one can observe that the material constitutive laws used are often derived from the experimental characterizations carried out at the macroscopic scale ignoring the bone microarchitecture. A micromechanical based approach revealed to be more suitable where the robustness of computation and accuracy of results are of interest. The present investigation is devoted to the theoretical formulation and validation of an ductile damage model applied to the human humerus bone in the thermodynamics framework. The approach consists in formulating the macroscopic material tangent operator by considering the linear local behavior of each phase. Due to the matrix-inclusion morphology of the bone microstructure, a Mori–Tanaka scheme was considered at the localization stage. In order to consider the strain rate effects on the humerus behavior, the standard model of Johnson-Cook was adopted as a preliminary trial. The obtained micromechanical model was implemented using a User Material subroutine (UMAT) within the explicit dynamic code LS-DYNA. The validity of the resulting finite element model was validated by comparing numerical predictions with experimental measurements at different length-scales. The outcome of the proposed ductile damage model appears to correctly predict the general trends observed experimentally through the good estimation of the ultimate impact load that a human humerus may encounter at fracture. The fracture patterns predicted by the proposed micromechanical damage model are consistent with the physical humerus rupture even if this model is limited only to the fracture initiation. Further improvements will be performed to the present model to take into account the marrow effects and fracture patterns.

Keywords
Micromechanical modeling; Ductile damage; Numerical simulation; Human Humerus

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/QEV2gaJcUwNj

Corresponding Author
kulsum none

Institutions
untirta

Abstract
In the company, production scheduling is an important step to find out when to start a job and when to stop to end a job. Good scheduling will have a positive impact, namely low operating costs and delivery times which can ultimately increase customer satisfaction. In this study, the focus of the problem was 3 job 5 machines on the production of nuts at PT X. PT X is a manufacturing company specializing in General Contractor - Machining & Recondition Services that uses the FCFS (First Come First Served) system in its scheduling operations. The type of production flow in this company is the job shop because each product goes through a different process in each operation. The problem that often occurs in this company is the accumulation of orders at one time with a large quantity of products and human resources that are still relatively low can be one of the causes of delays in completing orders for customers. The method used in this study is the Non Delay Method and the Heijunka Method. Where, the Non Delay method is a method that does not let the machine idle if an operation can be started. While the Heijunka method is more concerned with equity in its production. In this study, scheduling using the Non Delay Method is better than using the Heijunka Method or using the existing scheduling method used by the company, because it can produce a faster makespan value. With this Non Delay method, to produce 3 Job 5 machines produce makespan of 3772.01 minutes or 62.87 hours smaller than using the Heijunka Method which results in makespan 3820 minutes or 63.67 hours. While the results of existing scheduling makespan only produce 3880.35 minutes or 64.67 hours.

Keywords
Job Shop Scheduling, Non Delay Method, Heijunka Method, Makespan

Topic
Industrial Engineering

Link: https://ifory.id/abstract/6XeKLjgVh4U2

Corresponding Author
Retno Indriartiningtias

Institutions
a)Industrial Engineering Department, Trunojoyo University, Madura, Indonesia
*retnotmiitb[at]gmail.com, retno.indriartiningtias[at]mail.ugm.ac.id

b)Industrial Engineering Department, Gadjah Mada University, Yogyakarta, Indonesia

Abstract
Technology is one of key factors in achieving competitive advantage of an organization, especially those in creative industries. Through effective technology transfer is it expected to be transferred technology really can be absorbed and used by the creative industries. There are several factors that influence the effectiveness of technology transfer, there are:, the source of the technology, media transfer, forms of technology, receiver technology and many other variables. Some models and framework can also be used to study the relationship of the key factors of success with the effectiveness of technology transfer. Based on an conceptual model, this research aims to identify the key success factors of the process of technology transfer from the Trunojoyo University to creative industries in Bangkalan Madura. This study uses a multivariate approach by using principal component analysis and linear regression. Based on data from the four creative industries in Bangkalan obtained mathematical models Y = 0.830 + 0.379Internal Characteristics of Creative Industry + 0.450Characteristics of transferor - 0.371External Characteristics of Creative Industry. The model has a R2 value of 0.299, which means those factors capable identifies the effectiveness of technology transfer by 29.9%, the rest is explained by other factors that have not been identified.

Keywords
effectiveness technology transfer, creative industries, principal component analysis, technology

Topic
Industrial Engineering

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

Corresponding Author
Yustia Wulandari Mirzayanti

Institutions
1) Department of Chemical Engineering, Industrial Technology Faculty, Institute Technology of
Sepuluh Nopember, Surabaya, Indonesia, 60111.

2) Department of Industrial Chemical Engineering, Vocational Faculty, Institute Technology of
Sepuluh Nopember, Surabaya, Indonesia, 60111.

3)Chemical Engineering, Faculty of Industrial Technology, Institute Technology of Adhi Tama
Surabaya, Indonesia.

Abstract
The conversion of Ceiba pentandra oil to catalytic hydrocracking are suitable ways for biofuel. The focus of this study is to use Ceiba Pentandra oil catalytic hydrocarbon cracking and determine the alternative to petroleum fuels. The conversion of the Ceiba pentandra oil was carried out using a slurry pressure batch reactor, type 4563 PARR with a volume of 200 ml. This conversion process is done by varying the temperature factor (300-400oC), the reaction time over the range of 30-120 minutes and hydrogen pressure over a range of 30 bars using NiMo/HZSM-5. The conditions for the highest conversion of gasoil (C15-C18) as much as 43.78% were temperature of 400 minutes. The same conditions for kerosene (C9-C14) and long hydrocarbon chains (>C18) were present at 4.93% and 2.85% respectively. The kinetic study was determined to determine the order and kinetic parameters of activation energy (Ea) of 84,266 kJ.kgmol-1K-1 and the exponential factor from Arrhenius relationship. The order of this reaction has been determined of first order and the kinetic model is defined as -r_Tg=0.0157C_Tg. Ceiba pentandra oil triglycerides hydroconversion pathways were dependent on temperature and reaction time. The triglycerides could be hydrocracked to lower range hydrocarbons (C9-C14) by increasing the reaction temperatures.

Keywords
triglyceride conversion, catalytic hydrocracking, kinetic, NiMo/HZSM-5,biofuel

Topic
Chemical Engineering

Link: https://ifory.id/abstract/aU7QeGHZKJvu

Corresponding Author
Andinnie Juniarsih

Institutions
Universitas Sultan Ageng Tirtayasa

Abstract
There are two types of iron resources such as primary iron ore and iron sand. In general, primary iron ores use as raw materials in iron and steel making and can reduce directly. In Direct reduction process, Fe2O3 (hematite) is converted to metallic iron by the removal of oxygen. This work presents a kinetics study for direct reduction process of iron ore pellet. An investigation has been carried out of different reduction parameter such as differens sizes cylindrical geometry over temperatures ranging from 700oC to 1100oC for reaction time from 10 minutes to 1 hour. A number of different gas-solid reaction models was used to evaluate the reduction mechanism. The result was indicated that the initial reaction stage is chemically controlled which gradually transitions to diffusion controlled. The Arrhenius plot was used to determine the activation energy and pre-exponential factor for the corresponding reactions, compared with available data in the literature

Keywords
Pellet Geometry, Kinetics, Reduction, Iron Ore, gas-solid reaction model

Topic
Metallurgy Engineering

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

Corresponding Author
Sanggono Adisasmito

Institutions
Chemical Engineering Department
Institut Teknologi Bandung
Indonesia

Abstract
The need for energy use is increasing along with population growth, increasing energy consumption by the community, and due to the use of various types of equipment to support comfort. Biogas production contributes as a sustainable renewable alternative energy because raw materials are easily obtained and economical. However, biogas emissions can cause damage to the environment due to the presence of hydrogen sulfide pollutants. One method that can be used for this separation is adsorption using laterite soil. The advantage of using laterite soil as an adsorbent is that it is cheap, easy to obtain, and adsorption can occur at room temperature. In this study, the parameters to be varied are particle size and mass of laterite soil used. Before use, the laterite soil is dried first at 100oC for 1 hour. The process of separating hydrogen sulfide from biogas was carried out by flowing biogas into the adsorption column with a diameter of 2.5 cm containing adsorbent of laterite soil. Variations in the experiment are particle size, 6 and 21 mesh, and bed mass is 30 and 50 grams. The biogas flow rate is kept constant at 1.5 liters / minute. The particle size and bed mass affect the performance of adsorption. Reduction of particle size of the adsorbent from 6 to 21 mesh caused the hydrogen sulfide adsorption capacity to increase to 2.13 times. The bed mass addition from 30 g to 50 g caused the hydrogen sulfide adsorption capacity to increase to 1.15 times. The adsorbent worked optimally when the particle size was 21 mesh and with a mass of 50 g which had hydrogen sulfide adsorption capacity up to 14.96 mg H2S / g adsorbent.

Keywords
adsorption, biogas, hydrogen sulphide, laterite

Topic
Chemical Engineering

Link: https://ifory.id/abstract/J6QM2mheZkpW

Corresponding Author
Teuku Edisah Putra

Institutions
a Department of Mechanical Engineering,
Universitas Syiah Kuala - 23111 Banda Aceh - Indonesia
edi[at]unsyiah.ac.id
b Department of Mechanical and Materials Engineering,
Universiti Kebangsaan Malaysia - 43600 UKM-Bangi - Malaysia
c Departmental Chair of Mechatronics,
Universität Duisburg-Essen - 47057 Duisburg - Germany

Abstract
This work presents a wavelet-based analysis for locating higher amplitude segments of an acceleration signal. The acceleration signal was measured at an automotive coil spring driven on a public road surface using an accelerometer and a data acquisition to record the signal. The wavelet coefficient provided the energy distributions of a particular time and frequency. The energy was then utilized to locate the damaging segments in the acceleration signal. When the damaging segments were recombined into a single acceleration signal, it has an equivalent behavior with less than 10 % difference in terms of statistical parameters. It proved that the method successfully located the damaging segments in the acceleration signal.

Keywords
Energy; Power spectral density; statistics; vibration

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/MmB9cuKCGzEy

Corresponding Author
Sirawadee Arunyanart

Institutions
a) Supply Chain and Logistics System Research Unit, Department of Industrial Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand
*sirawadee[at]kku.ac.th
b) Faculty of Engineering, The University of Leicester, Leicester, LE7 1RH, UK

Abstract
The establishment of the ASEAN Economic Community (AEC), which facilitates the movement of goods, services, investments, capital and skills, not only increase trade and investment among member countries, but also promote and expand regional production sharing and network. Companies that look for appropriate places to locate their affiliates can take advantage of this economic integration by cross-border production sharing. Many industries in Thailand can also take an opportunity of fragmenting production processes to other countries, especially to CLMV countries (Cambodia, Laos, Myanmar and Vietnam) since there are several factors contributing these countries to be potential destinations for international production fragmentation. The aim of this paper is to find suitable destination country among CLMV for the production fragmentation of Thai electronics industry. Fuzzy multiple criteria decision-making methodology based on fuzzy TOPSIS (fuzzy technique for order preference by similarity to ideal solution) approach is applied in the selection of the destination country. By considering eighteen criteria including both quantitative and qualitative aspects, the result shows that Vietnam is the optimal destination country for fragmenting production of Thai electronics industry internationally.

Keywords
Location selection, International production fragmentation, Fuzzy TOPSIS, Electronics industry

Topic
Industrial Engineering

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

Corresponding Author
Duenrung Suwannasopa

Institutions
Khon kaen university

Abstract
The objective of this paper is to configure logistics network of high-quality beef in Northeastern Thailand for exporting to Vietnam, which is considered as potential target market. The beef logistics network consists of suppliers which are cattle production regions, existing exporting slaughterhouses, new exporting slaughterhouses, domestic markets, and foreign markets. The mathematical model was developed to determine the optimum networks for distributing quality beef to customer in both domestics and foreign destinations. The logistics networks were configured by determining both physical and behavioral constraints such as supply volume of raw materials, transportation distance, capacity of slaughterhouse, consumer demand for beef, and price of beef. The optimal networks were identified by maximizing the profits of beef logistics network. This study is the foundations for developing a tool for configuration decision of the high-quality beef logistics and supply network to new markets in ASEAN and other countries. The study could be useful for international trade and investment planning in the future.

Keywords
Logistics, beef logistics network

Topic
Industrial Engineering

Link: https://ifory.id/abstract/N7QXv2CJyBKm

Corresponding Author
Mikhail Vyacheslavovich Dolgopolov

Institutions
a) Samara University
b) Samara Polytech
&
* TP A&ST

Abstract
Green technologies involve the use of radioisotope waste from nuclear power plants to generate electricity by directly converting the energy of radiochemical transformations through semiconductor structures. The generation of multi-nanolevel electricity by means of the heterostructure of silicon carbide on the silicon substrate was tested (on the example of a radioisotope medical product containing C-14). The content of C-14 in the SiC phase was determined at the doping level, but this was sufficient to generate nonequilibrium carriers in the p-n region of the transition in silicon carbide and their separation by the space charge region field, while dark currents from 16 to 90 nA were observed in the external circuit. The measurements were carried out on the stand excluding electromagnetic interference without the formation of metallization of the contact pads by the tip probe method. Idling voltage was amounted to 1.6 mV. The thickness of the activated n-SiC film in the heterostructure is 5 µm. References: Gurskaya A.V., Dolgopolov M.V., Chepurnov V.I. C-14 Beta Converter // Physics of Particles and Nuclei. 2017. — Vol. 48. Issue 6. — P. 941-944. Akimchenko A., Chepurnov V., Dolgopolov M. etc. Betavoltaic device in por-SiC/Si. C-Nuclear Energy Converter // EPJ Web of Conferences. — 2017. — Vol. 158.

Keywords
GREEN TECHNOLOGIES, SEMICONDUCTOR STRUCTURES, SILICON CARBIDE, ENERGY CONVERSION

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/tmUJkA8zjF7P

Corresponding Author
Danang Setiawan

Institutions
a) Industrial Engineering Department, Universitas Islam Indonesia, Yogyakarta 55584, Indonesia
*Danang.setiawan[at]uii.ac.id

Abstract
Air Jet Loom (AJL) is a critical machine in textile industries, used to convert thread into fabric. This research uses a leading textile company in Yogyakarta as a study case. Preliminary observation in the case study shows that the AJL machine has a high downtime that affects the overall production process. This study aims to identify critical components of AJL machine and designing maintenance system for AJL machine to reduce downtime. Reliability centered maintenance (RCM) method was used in designing maintenance system by focusing on improving machine reliability. The study begins with the identification of critical components of AJL machine using a fishbone diagram and continued with pareto diagram. For each critical component, time between failure (TBF) data was collected. The collected TBF data is then used to calculate the level of reliability and maintenance schedule. The results found that there are six critical components of AJL machine, i.e. VPM, take up, insertion, kamran, oil circulation, and leno. The preventive maintenance scheduling interval for the six components is VPM 120 hours, belt take up 144 hours, insertion 72 hours, kamran 24 hours, oil circulation 144 hours and leno 96 hours. The proposed preventive maintenance schedule on the six critical components of AJL machine was able to reduce downtime by 30% and increase fabric production by 13%.

Keywords
Air Jet Loom; Maintenance; Reliability Centered Maintenance, Reliability

Topic
Industrial Engineering

Link: https://ifory.id/abstract/cK9h8xZafujt

Corresponding Author
Sidik Susilo

Institutions
a) Jurusan Teknik Mesin, Fakultas Teknik Universitas Sultan Ageng Tirtayasa
Jl. Jendral Soedirman KM.3 Cilegon 42435, Indonesia
*sidik[at]untirta.ac.id
b)Jurusan Teknik Mesin, Fakultas Teknik Universitas Sultan Ageng Tirtayasa
Jl. Jendral Soedirman KM.3 Cilegon 42435, Indonesia
c) Jurusan Teknik Mesin, Fakultas Teknik Universitas Sultan Ageng Tirtayasa
Jl. Jendral Soedirman KM.3 Cilegon 42435, Indonesia
d) Jurusan Teknik Mesin, Fakultas Teknik Universitas Sultan Ageng Tirtayasa
Jl. Jendral Soedirman KM.3 Cilegon 42435, Indonesia
e) Jurusan Teknik Elektro, Fakultas Teknik Universitas Sultan Ageng Tirtayasa
Jl. Jendral Soedirman KM.3 Cilegon 42435, Indonesia

Abstract
Modeling of electromagnetic energy harvesting on the vehicle suspension system is presented in this paper. This study uses the up and down movement oscillation of the shock absorber to vibrate the SDOF module which is consist coil and a permanent magnet. The mathematical model is developed by using Faraday law to estimate the electrical response of the energy harvester. The effect of resistance load is admitted in the mathematical model its effect on the performance of the energy harvester. The effect is investigated for different values of frequency and resistance load. This method proposed regenerative absorber is effective and practical for renewable energy applications.

Keywords
Modeling, Electromagnetic, energy harvesting, vehicle suspension

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/cA8GgTUq3bku

Corresponding Author
Nuraida Wahyuni

Institutions
Faculty of Engineering, University of Sultan Ageng Tirtayasa
Jl. Jend. Sudirman KM 3, Cilegon, 42435, Indonesia
*nrdwahyuni[at]gmail.com

Abstract
Users have a very important role in the service industry. If the users are satisfied with the service, then they will reuse it in the future. Conversely, if they feel dissatisfied, users will look for similar services from competitors. In this research, the case study is XYZ, one of online marketplaces that have begun to evolve in Indonesia. The purpose of this study is to measure e-service quality from the perception of users by using the Kano-IPA integration model. The research methodology used is by distributing questionnaires. Service attributes are based on the dimensions of E-Service quality; consisting Efficiency, Fulfillment, Reliability, Privacy, Responsiveness, Compensation and Contact. The number of service attributes designed is 28. Respondents are users of the XYZ in Cilegon. Importance Performance Analysis (IPA) is one of satisfaction analysis methods that is commonly used to map the level of satisfaction with the level of importance of service attributes. On the other hand, the Kano model classifies service attributes under the category of Must-Be, Performance, and Attractive. The results shown that the Compensation dimension still needed serious attention from the management. The highest level of satisfaction felt by service users was in the Privacy dimension.

Keywords
E-Service; Quality; User perception; IPA; Kano

Topic
Industrial Engineering

Link: https://ifory.id/abstract/v4hYKEUnJw9p

Corresponding Author
Alfirano Alfirano

Institutions
1. Metallurgical Engineering Department, Universitas Sultan Ageng Tirtayasa
*alfirano[at]untirta.ac.id
2. Badan Tenaga Nuklir Nasional (BATAN) Serpong

Abstract
Co-Cr-Mo alloys is one of the implant materials used to replace bone in humans. This material is widely used because they have excellent in corrosion and wear resistance. In this study, the effect of carbon and nitrogen on microstructure and mechanical properties were investigated. The specimens of Co-Cr-Mo alloy were made by investment casting. The compositions of the alloys are Co-28Cr-6Mo-0.8Si-0.8Mn-0.8Fe-0,2Ni-(0.08-0.25)C-(0-0.2)N. After that process, microstructure of the alloys is characterized by, SEM and XRD testing using bulk and electrolytic extracted specimens. The mechanical properties were determined by tensile and hardness testing. The precipitate content in as-cast alloys was increased with the addition of carbon and nitrogen. The main precipitate formed in the specimens with variations in carbon and nitrogen is M2X type, π-phase, χ-phase, σ-phase, and M2X 6 . In addition, increasing in carbon and nitrogen content in the alloys, increased the value of hardness, ultimate tensile strength, and yield strength in as-cast Co-28Cr-6Mo-0.8Si-0.8Mn-0.8Fe-0.2Ni alloys.

Keywords
Co-Cr-Mo alloy, as-cast, alloy addition, carbon, nitrogen, precipitate, mechanical properties

Topic
Metallurgy Engineering

Link: https://ifory.id/abstract/HwG6MLPazZT8

Corresponding Author
Galih Senopati

Institutions
Universitas Indonesia

Abstract
Ti-6Al-4V alloy have been used widely for biomedical application, but its elastic modulus is still higher compared with human bone. Moreover, it contains V and Al that have been reported as toxic element. In this study new beta type Ti-6Mo-6Nb-xSn (0, 4, 8 wt.%) have been developed. The aim of this study was to evaluate the Sn addition on microstructural transformation, mechanical behaviour, and corrosion resistance of Ti-6mo-6Nb-xSn alloys. The Ti-6Mo-6Nb-xSn alloys produced by arc re-melting process and the obtain ingot were characterized using optical microscope, x-ray diffractometer, ultrasonic evaluation, vicker-s hardness tester, and polarization test to evaluate the corrosion resistance. The result showed that Ti-6Mo-6Nb-8Sn has the lowest elastic modulus and vickers hardness value. The Sn addition could suppress α phase formation. Ti-6Mo-6Nb-8Sn has lower corrosion rate compared to commercial Ti6Al4V.

Keywords
Ti-6Mo-6Nb-xSn, Arc Re-melting, Elastic Modulus, Corrosion Resistance

Topic
Metallurgy Engineering

Link: https://ifory.id/abstract/bmcGP8DZHrMa

Corresponding Author
Sonna Kristina

Institutions
ITHB
Jl. Dipatiukur No. 82
Bandung - 40132
Indonesia

Abstract
Bandung have more than 500 city park that spread in 5 sector which need to be maintain by watering. Diskamtam are the party whose responsible for watering the city park so that need a route and schedule so that it can minimize the operational cost. In the previous research, 2 sector (2nd sector and 4th sector) route is developed by salesman traveling problem. And in this research route will developed by Clark and Wright Saving Heuristic method and considering traffic congestion factor. The output resulting from the route determination process is to minimize transportation cost and develop watering schedule during one-month period. Based on the results of the research it was found that second sector formed five watering routes and fourth sector with six watering routes. Comparison of costs incurred in this research is greater than the previous research for second sector Rp. 9.617.150,00 with an increase in operational cost of 0.69% and the fourth sector Rp. 9.163.416,00 with an increase in operational cost of 0.83%, this is affected by congestion factor.

Keywords
Capacitated Vehicle Routing Problem (CVRP), Clark and Wright Saving Heuristic algorithm, and congestion factor.

Topic
Industrial Engineering

Link: https://ifory.id/abstract/ND6kPTEYm3Cb

Corresponding Author
Ade Irman

Institutions
a) Industrial Engineering, University of Sultan Ageng Tirtayasa, Indonesia
*irman[at]untirta.ac.id
b) Industrial Engineering, University of Sultan Ageng Tirtayasa, Indonesia
**evi[at]untirta.ac.id
c) Industrial Engineering, University of Sultan Ageng Tirtayasa, Indonesia
***khasanahuswatun636[at]gmail.com

Abstract
Scheduling is defined as the process of allocating resources over time to perform a collection of tasks within a certain period of time. PT KHI Pipe Industries in Cilegon Indonesia, has been producing high quality longitudinal and spiral weld steel pipes, which is use for oil, gas, water and pile pipes. The company uses FCFS (first come first serve) rule for scheduling their jobs, which means that job processing based on the first incoming prioritizes orders. In October 2018 there was delay in their production, namely 1771 pipes are still in work in process (WIP) of total demand is 6,296 pipes. Based on these problems, this research tries to determine a better production scheduling by getting minimum makespan as scheduling performance. Heuristic and metaheuristic methods used in this research for minimizing the makespan, there are Campbell Dudek Smith (CDS) for heuristic and Particle Swarm Optimization (PSO) for metaheuristic. We also proposed a new heuristic algorithm for this problem. The results show the makespan of each method, there are CDS method: 742.87 hours, PSO method: 711.96 hours, Proposed Heuristic Algorithm method: 694.64 hours, and existing production scheduling of FCFS rules is 746.43 hours. Based on the results, the Proposed Heuristic Algorithm has smaller makespan than the others.

Keywords
Campbell Dudek Smith; Particle Swarm Optimization; Proposed A New Heuristic Algorithm; Makespan

Topic
Industrial Engineering

Link: https://ifory.id/abstract/xAGEyN3bLDF6

Corresponding Author
Sirojuddin Abbas

Institutions
a) Department of Mechanical Engineering, State University of Jakarta
b) Design Laboratory of Mechanical Engineering, State University of Jakarta

Abstract
The purpose of this research is to find out the best blade profile to increase power of banki water turbine. In this research the blade profile will be made in 5 variants. Variant P1 as a standard and other 4 variant P2, P3, P4 and P5 are the modification profile.The observation focus on output power and flow line contour inside runner of the turbine. The experiment was conducted by CFD software simulation. Head of the water is 5.5 m and discharge 2 m^3/min. Based on the simulation, test result shows that variant P2 is the highest with power increase 10.5 % compare to variant standard P1 and the best flow line countour compare to others.

Keywords
blade profile; banki water turbine; increase power; flow line

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/ZL8aTXRDtphq

Corresponding Author
I Gusti Lanang Bagus Eratodi

Institutions
a) Civil Engineering Department, Universitas Pendidikan Nasional Denpasar
* eratodi[at]undiknas.ac.id

Abstract
Moment resistance of bamboo lamination joint is semi-empirically analyzed by considering the experimental results of various punched plate connector-bolt connections and the energy conservation principle. Laminated bamboo is a product that can act as substitution material of timber. In the analysis, experimental load-slip response plate connector-bolt connection is approximated by exponential and bi-linear models. Verification of the proposed models is carried out through full scale test of semi-rigid joints that monotonically loaded by a pure moment. Four-point bending test was applied on beam moment connection of laminated bamboo structure with plate connector 8 mm thick and 12.2 mm diameter bolts. Bamboo specimens of Petung, split dimension 5×20 mm2, cold pressure 1.5-2.0 MPa, of diameter with pre-stressed bolts of 0.5 MPa-1,00 MPa and two various plate connector fasteners are implemented in both laminated bamboo-steel-to-laminated bamboo connections. Experimental results show punched plate connector fasteners that have long distance along the grain between bolts gives high moment capacity, high ductility, and high rotational stiffness. Laminated bamboo-punched plate-to-laminated bamboo connections have higher moment resistance and higher ultimate joint rotation than laminated bamboo-steel-to-laminated bamboo. Punched plate connector fasteners gave contribution higher friction than steel connector. It indicated that the punched plate connector contributed greater dissipation energy in this connection.

Keywords
moment resistance, laminated bamboo, steel connector, punched plate

Topic
Civil Engineering

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

Corresponding Author
Didied Haryono

Institutions
1Department of Metallurgical Engineering, University of Sultan Ageng Tirtayasa,
Cilegon 42435, Banten, Indonesia 1
2Department of Metallurgical and Materials Engineering, Universitas Indonesia,
Depok 16424, Jawa Barat, Indonesia
3 Center for Non-Destructive Testing and Process Imaging (CNDTPI), CTECH Labs Edwar Technology,
Tangerang 15235, Banten, Indonesia

Abstract
Metallurgical performance in flotation process can be expressed by recovery or grade. In column flotation process, recovery is affected by several factors including particle size and air flow rate. Particle size and air flow rate affect the interaction of mineral particles with air bubbles. Metallurgical performance of column flotation process can be determined by monitoring. Electrical capacitance volume tomography (ECVT) used as a monitoring technology by utilizing the difference in permittivity values of objects in column flotation and producing volumetric and real-time images. Monitoring column flotation process was carried out to observe the effect of particle size and air flow rate on recovery and 3D image resulted by monitoring. Column flotation experiments were carried out on a column flotation laboratory scale with particle size variations of -80+100

Keywords
Column flotation, recovery, particle size, air flow rate, ECVT.

Topic
Metallurgy Engineering

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

Corresponding Author
Alimuddin Alimuddin

Institutions
a) Department of Electrical,. University of Sultan Ageng Tirtayasa, I-CEFORY-Untirta
Jl. Jend Sudirman KM. 3 Cilegon 42435 - Indonesia
*alimuddin[at]untirta.ac.id
b) Department of Mechanical and Biosystem Engineering,. IPB University
Jl Darmaga Bogor, Indonesia
d) Department of Biology Education. University of Sultan Ageng Tirtayasa
Jl Raya Jakarta Km04, Pakupatan Serang, Indonesia
e) Department Agroecotechnology, University of Sultan Ageng Tirtayasa
Jl Raya Jakarta Km04, Pakupatan Serang, Indonesia

Abstract
The development of red chili cultivation has not been so good in the conventional way, namely farming, technology of modern cultivation systems is needed, namely microcontrollers - sensors, aeroponic systems and greenhouses, as well as observing environmental conditions including oxygen. To observe the condition of oxygen, it was necessary to experiment with integrated equipment of aeroponic and green house microcotrolers which were carried out for 3 trials in the morning, afternoon and evening. In the morning the data collection was carried out at 9:00 a.m. to 10:00 p.m. Figure 5 is the result of oxygen monitoring in the morning. The set point needed for oxygen is 15 to 20 ppm (Part Per Milion). On oxygen control less than 15 ppm, pure oxygen will be given, but if the oxygen level exceeds 20 ppm the fan will be wrong to reduce the oxygen gas content around the roots of the red chili plant.

Keywords
Monitoring System, Oxygen, Red Chili, Sensor,,Aeroponics, Green House

Topic
Electrical Engineering

Link: https://ifory.id/abstract/PZb6WQed2XND

Corresponding Author
Ahmad Shulhany

Institutions
1)Departement of Civil Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa
2)Mathematics lecturer, UIN Sultan Maulana Hasanuddin
3)Departement of Mechanical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Abstract
Concepts connect the minimum number of passwords needed with the security system are monochromatic connectivity and rainbow connectivity. Rainbow connectivity has been introduced by Chartrand, et al. (2008), and monochromatic connectivity has been introduced by Caro and Yuster (2011). The focus of this paper is G, which is a simple, trivial, undirected, and 4-connected graph. Let s, and n be natural numbers, G is an ordered set of vertices set V(G) and edges set E(G), a 4-connected graph with order n. A coloring function d:E(G)→[1, s] is called rainbow edge s-coloring, if each pair of vertices u and v in V (G) has 4 internally disjoint u-v paths that have different colors or rainbow paths. The minimum number of colors needed so that each pair of vertices u and v in V(G) has 4 rainbow u-v paths called rainbow 4-connection number, rc4(G). Furthermore, the monochromatic u-v path is a u-v path that has the same colors. The monochromatic connection number, cr(G), is the minimum colors needed so that each pair of vertices u and v in V(G) has a monochromatic u-v path. In this paper, we show rc4(G) and cr(G) on some special graphs.

Keywords
4-connected graph, monochromatic connection number, rainbow connection number

Topic
Electrical Engineering

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

Corresponding Author
Muhammad Rifai

Institutions
a) Center for Science and Advanced Material Technology, BATAN, Serpong, Indonesia
*iamrifai[at]yahoo.com
b) Center for Nuclear Fuel Technology, BATAN, Serpong, Indonesia
3Synchrotron Light Research Institute (SLRI), Thailand

Abstract
Zirconium-based materials have attracted extended analysis interest because of their high structural practicality, excellent chemical sturdiness, and intractableness. ZrO2 is additionally wide identified to be used as a surrogate for learning the mechanism of UO2 kernel fabrication of High-Temperature Reactor (HTR) fuels. ZrO2 has similar properties to UO2 system in such a way that microbeads are of paramount importance, especially in the case of such nuclear stimuli-responsive systems. This beads stability will be strongly correlated to the precursor composition and the steps of the synthesis process. One of the simple synthesis processes of ZrO2 microbeads is by gelation process, which could be carried out by internal gelation or external gelation. This article will discuss the synthesis result of ZrO2 microbeads system using external gelation process to understand the gelation process with the emphasis will be given to the interaction of PVA-THFA host–ZrO2 guest systems. FTIR and thermal data were thoroughly explored to derive the mechanism during the gelation process concerning conventional gels in describing general aspects of gel formation.

Keywords
Zirconium; HTR, Surrogate; Gel Formation; Morphology

Topic
Materials Science

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