Indonesia Conference Directory

Corresponding Author
Dwinanto Sukamto

Institutions
(1) INSA de Strasbourg, Laboratoire ICUBE, Université de Strasbourg, Strasbourg, France
(2) Engineering faculty, Universitas Sultan Ageng Tirtayasa, Banten, Indonesia

Abstract
The hotbox machine at Climatherm laboratory was used for thermal test on the wall. This hotbox machine allows the measurement of different environmental variables. In this research, thermal performance tests were conducted on the wall imposing boundary condition vary the cavity distance between two wall elements and then these tests were performed in steady-state conditions. The wall prepared from aluminium composite and was maintaining controlling the temperature difference between the two chambers 20°C and the air debit constant. In the first part of this paper, a description of the hotbox machine, operation ranges and theoretical work principles of the hotbox are presented. Then, the second part shows the results for thermal test on the wall. The thermal test performed with the hotbox machine allow simulating environmental conditions accurately during in certain distance of cavity and in certain air debit. As a result, the configuration settings value at the hotbox machine have to correction to reach the temperature difference as planned. The temperature difference at beginning of the thermal tests on the wall is less than planed temperature difference. However, this correction value of temperature shows agreement result with the value 20°C in temperature different.

Keywords
Temperature different; the hotbox; thermal tests; the wall

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/zHL4vcQ7hxjT

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
Muhammad Fakhruriza Pradana

Institutions
1) University of Sultan Ageng Tirtayasa
2) Universität Duisburg-Essen

Abstract
Maritime transportation plays a very important role in world trade, more than 90% of world trade using this mode. Along with the development of science and technology, maritime transportation faced more complex and robust problems in term of their optimization. In this paper, we purpose a Systematic Literature Review (SLR) on Maritime Transportation Optimization (MTO) in three-level decision making that is strategic level, tactical level, and operational level. We also have identified Linear Programming (LP) as a proper preference to study MTO. This SLR using a structured approach that involves bibliometric and network analytics from the articles published during 1976 – 2019. Some of the key findings in this study as follows, (i) research and citation in MTO using LP is growing rapidly and reached its peak in 2018; (ii) three countries with the highest number of articles are the United States, Norway, and China; (iii) shows a great opportunity for future research to combine strategic planning, tactical planning, and operational planning.

Keywords
Linear Programming, Maritime Transportation, Optimization, Systematic Literature Review

Topic
Civil Engineering

Link: https://ifory.id/abstract/ZyhxqYdPp2Cf

Corresponding Author
Muhammad Ichsan

Institutions
1 Institute of Embedded Systems, University Duisburg-Essen, Forsthausweg 2, 47057 Duisburg, Germany
2 Institute of Transport Systems and Logistics, University Duisburg-Essen, Forsthausweg 2, 47057 Duisburg, Germany
3 Department of Civil Engineering, University of Sultan Ageng Tirtayasa, Jl. Jend Soedirman KM 3 Cilegon 42435 Indonesia

Abstract
In this research, the Energy Efficiency Operational Indicator (EEOI) used as emission estimation parameter on three Indonesian-s sea toll way corridors. Operational data of the ships, such as speed, Deadweight Tonnage (DWT), load and load-s utilization are used in this research. Moreover, unavailable operational data are to be assumed with comparable assumptions or suitable calculation. Furthermore, the data are used to calculate the fuel consumption of the voyage, which is the main variable in the emission index calculation. The method, so-called, a ‘slow-steaming- method is utilized to optimize the emission parameter. The result shows that the slow steaming process is indeed bring more efficient emission result for the sea toll way under consideration. Decreasing the speed to 10% of current speed is decreasing the Fuel Consumption of the ships around 17% to 19% yearly. Decreased it further to 12%, lowered the fuel consumption around 23% from current yearly fuel consumption. Moreover, Applying slow steaming with 10% and 12% rate in each route resulted in a decreasing rate of emission produces of around 19% and 23% respectively. These result is encouraging for an initial step to measures the emission level on the Sea tollway. However, more data and better modelling parameter method is advised for future researcher in the area.

Keywords
Displacement of the ship; Energy Efficiency Operational Indicator; CO2 emission; slow steaming.

Topic
Civil Engineering

Link: https://ifory.id/abstract/V7zjwTc4tZQh

Corresponding Author
Novia Novia

Institutions
Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya, Jl. Raya Palembang-Prabumulih km.32, Inderalaya, Ogan Ilir, Sumatera Selatan, 30662, Indonesia.
*novia[at]ft.unsri.ac.id

Abstract
The development of alternative energy sources from renewable natural resources has been carried out regulerly. One of the alternatives is the utilization of agricultural waste such as rice husk to produce bioethanol. However the cellulose content in rice husk is blocked by complex lignoseulosic matrices such as lignin which will disrupt the hydrolysis process. The pretreatment is needed to break the bond. In this study, pretreatment was carried out using the Aqueous Ammonia Soaking (AAS) and dilute acid methods with various ammonia concentration and temperature of pretreatment. The composition of rice husk was analyzed using Chesson methods. Three series of works were carried out, namely pretreatment, hydrolysis and fermentation. Pretreatment was carried out with various concentration of 5, 10, 15, 20, 25 % (v/v) and temperature of 60, 70, 80 90, 100 oC. The highest cellulose content was about 57.94% at ammonia concentration of 20% (v/v) and a temperature of 100 oC. Furthermore, enzymatic hydrolysis produced the highest glucose of about 24.1774 ppm and bioethanol of 11,21%.

Keywords
Aqueous Ammonia, Bioethanol, Dilute Acid, Fermentation, Hydrolysis

Topic
Chemical Engineering

Link: https://ifory.id/abstract/aEDZx4KUvb3T

Corresponding Author
Akhmad Sutoni

Institutions
Department of Industrial Engineering
University of Suryakancana

Abstract
CV. Do-a Sepuh is a rice mill company. This factory often experiences problems in the cost of engine maintenance which increases every year. Therefore, planning actions must be taken in the form of replacement and selection of new, more economical machines. This study aims to make a model of engine replacement decisions to minimize the expectation of total costs, calculate the time (years) that is appropriate to make changes using the Dynamic Programming method. As well as making decisions on the use of new machines using the Analytical Hierarchy Process (AHP) method. Previously, a Focus Group Discussion I (FGD I) was conducted to determine which machines would be chosen and determine the engine selection criteria. Furthermore, Focus Group Discussion II (FGD II) was carried out to calculate the operating costs of new machines, revenue for new machines, the remaining number of new machines, and filling out questionnaires. The results obtained were the decision to replace diesel engines in the first year. The engine chosen, for the selected diesel engine is machine 1 (Yanmar TS 230 R).

Keywords
Dynamic Programming, Analytical Hierarchy Process (AHP), Machine Replacement, Machine Selection

Topic
Industrial Engineering

Link: https://ifory.id/abstract/WNBuUTgXQZ64

Corresponding Author
Nazaruddin Sinaga

Institutions
a) Mechanical Engineering Department, Diponegoro University, Jalan Prof. Soedharto SH, Tembalang, Semarang 50275, Indonesia
*) nsinaga.ccfed[at]yahoo.com

Abstract
The aerodynamic performance of wind turbine airfoils is an important foundation for the aerodynamic design and the performance analysis of the wind turbine. The purpose of the study reported herein was to obtain the effect of the free stream turbulence intensity on the aerodynamic performance of wind turbine airfoil NACA 4415, by using a two-dimensional numerical method. The study was performed by varying the turbulence intensity from 0.1% to 10% at fReynolds number of 216,000, and by changing the angle of attack from -4 to 24 degrees. The airfoil has a chord length of 0.153 m. The finite volume method was used in this study, and the aerodynamic performance of the airfoil was analysed. The lift and drag coefficient of the airfoil were discussed and validated. It was found that The free stream turbulence intensity can reduce the values of CD, CD, CP and CL/CD, while The free stream turbulence intensity does not significantly affect the wake area behind the airfoil. The decrease in airfoil efficiency observed was caused by disruption of the boundary layer flow which resulted in a decrease in the total pressure coefficient on the airfoil surface. The intensity of turbuence can attenuate the thickness of the boundary layer, which results in a decrease in shear stress on the surface of the airfoil. It is concuded that the free stream turbulence has a significant effect on airfoil performance, where the effect can increase or decrease the performance

Keywords
airfoil, wind turbine, free stream, turbulence intensity, aerodynamic performance, numerical analysis, stall angle, lift and drag

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/M7Yv6Xej38JZ

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
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
Nuraida Wahyuni

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

Abstract
The measurement of workload is carried out to determine the amount of burden on a position through job description. Before determining the number of man power, it is necessary to measure the workload for a certain position. The method commonly used is the Full Time Equivalent (FTE) method. The FTE method is used to calculate workloads with various task variations. The case study in this study is ABC, a machine maintenance service company. As a company engaged in the service sector, having high quality and proportional number of human resources (HR) is important in order to provide the best service for customers. For this reason, an application is needed that can support FTE calculations. The purpose of this study is to find out the number of employees by calculating workloads based on the Java-based FTE method. The design of this application is done using the System Development Life Cycle (SDLC) approach. The design of this application starts from the stage of analysis, design, coding, testing, and maintenance. Functional needs refer to the HR division as user and administrator. The research findings are expected to facilitate the relevant divisions to calculate employee-s workloads using Java applications.

Keywords
Workload calculation; FTE; Design; SDLC; Java

Topic
Industrial Engineering

Link: https://ifory.id/abstract/B9KPvQrbU3fH

Corresponding Author
Bening Nurul Hidayah Kambuna

Institutions
a) Metallurgical engineering Department, Universitas Sultan Ageng Tirtayasa
*kambuna.bening[at]gmail.com
b) Metallurgical engineering Department, Universitas Sultan Ageng Tirtayasa

Abstract
In the processing of nickel ore into ferronickel, simultaneously dust is produced in the rotary dryer, rotary kiln and electric furnace. The dust still contains nickel. Dust is formed into pellets and will be reused in rotary kiln for ferronickel production Ferronickel dust pellet is processed by reduction through addition of coal as much as 10% of pellet weight with a variation of reduction temperature at 1000°C, 1100°C, 1200°C, 1300°C and 1400°C to observe growth of ferronickel particles. Study of reduction of composite pellets, pellet of ferronickel plant dust are mixed with coal reductor as much as 10% of their weight and then reduced at temperature of 1000°C, 1100°C, 1200°C, 1300°C, 1400°C for 30 minutes. Reduction behavior of pellet can be analyzed with XRD and analysis of particle growth of ferronickel was observed by using optical microscope. At this temperature SiO2 reduced to Si and reacts with Fe to form Fe3Si. The length of ferronickel particles increases along with increase of temperature. At a temperature of 1000°C = 43μm, 1100°C = 152 μm, 1200°C = 419 μm, 1300°C = 736 μm, to 1400°C = 1426 μm. Increasing ferronickel particles showed that particle growth occurs on increasing the temperature.

Keywords
Rotary Kiln, Ferronickel Dust Pellet, coal, Particle Size of Ferronickel

Topic
Metallurgy Engineering

Link: https://ifory.id/abstract/g6qRTfxcCBQM

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
Amatulhay Pribadi

Institutions
Institut Teknologi Nasional

Abstract
Thermal load due to a fire along with wind load is one of the loads which may occur on the building structure. Meanwhile, the planning of buildings in Indonesia generally does not take the load into account. The presence of thermal load can lead into the degradation of structure especially for steel structure which has low resistance to fire. The result of this thermal load is failure which can lead into the collapse of the building. In this study, there will be studied the effect of thermal and wind loads on the response of steel building structure. The structure of the building that will be studied in this research is a fifteen stories building which serves as an office. In the preliminary design stage, there will be determined the dimensions and the profiles of steel which are used for structural elements based on the required codes. Thermal load along with wind load will be assigned on the building structure by considering the degradation of steel properties, the reduction of live load and super imposed dead load, and the speed of extinguishing process. This simulation is divided into three cases which are fast extinguishing, slow extinguishing, and the determination of the critical thermal load. At the stage of preliminary design and fire simulation, structural analysis will be done using the ETABS program. The result of fire simulation shows that the temperature level and the location of the fire will greatly affect the resistance of steel building structure. If the temperature is higher, the stress ratio of structural elements will expand too. In the determination of the critical thermal load, it is obtained that the minimum thermal loads which can cause failure in one major structural element are generally different at the bottom, middle, and top level of stories. In this case study, the highest critical temperature load is on the top level stories.

Keywords
Thermal Load, Speed of Extinguishing Process, Load Reduction, Steel Properties Degradation, Structure Failure

Topic
Civil Engineering

Link: https://ifory.id/abstract/gF7c9R4dTDEA

Corresponding Author
Brario Anindito

Institutions
Kampus Institut Teknologi Sepuluh Nopember
Sukolilo. Surabaya 60111

Abstract
In the coal boiler industry, cyclone is used to separate silica sands (as a fluidizing medium) from flue gas (combustion gas from furnace). A gas-solid separation system with turbulent swirling flow that occurs in the cyclone will cause erosion on the cyclone wall. Erosion can cause a decrease the performance and increase the maintenance cost of cyclone. CFD simulation was conducted on the actual cyclone dimensions used in the coal boiler industry with a diameter of 5120 mm and height of 13970 .It was performed using the Eulerian-Lagrangian approach with Reynolds Stress Model (RSM) for turbulence in the gas phase and Oka model for the erosion model. The inlet velocities ranged from 7 to 8 m/s and the solid rates ranged from 30 to 40 kg/s with silica sands as solid particles (diameter between 0,075 and 1,5 mm). This study will analyze the erosion rate on the cyclone wall at various gas inlet velocity and solid rate variations. at Selected local area , the results shown that the higher gas inlet velocity for the same solid rate will increase the erosion rate (about 25%) and the higher solid rate for the same velocity will also increase erosion rate on the cyclone wall (about 17%)

Keywords
Cyclone , Erosion rate , CFD , Coal Boiler Industry

Topic
Chemical Engineering

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

Corresponding Author
Sri Sarjana

Institutions
a) SMK Negeri 1 Cikarang Barat, Jl. Teuku Umar No. 1 Cikarang Barat, Bekasi, Indonesia.
b) SMA Negeri 1 Cikarang Utara, Jl. KH Dewantara 91, Cikarang Utara, Bekasi, Indonesia.

Abstract
Global competition requires high speed, accuracy, creativity and consistency to win business through strengthening optimal competitiveness. Choosing the right business strategy create effective business achievements to be able to compete in the face of uncertain and turbulence economic conditions. This study empirically investigates important role of human capital, infrastructure, supply chain, and technology on companys business strategy in industrial estate and its impact on strengthening competitiveness of manufacturing industry. The author conducted survey of companies in industrial estate to test hypotheses and apply survey analysis techniques using structural equation modeling. Results of this study concluded that human capital, infrastructure, supply chain, and technology have positive influence on competitive strategies and have positive impact on competitiveness of manufacturing industries, especially those located in industrial estates. In addition, importance of choosing right business strategy greatly determines how much this business has superior competitiveness compared to its business competitors. This research is expected to be used as suggestion and reference for business units and manufacturing industries to be used as one of considerations in the development of companies in industrial estates that are being developed widely, especially outside Java by government to get best competitiveness.

Keywords
Competitiveness; Business strategy; Supply chain; Human capital

Topic
Business Strategies on GVC Participation

Link: https://ifory.id/abstract/VuwbzJc3jDAQ

Corresponding Author
NJO ANASTASIA

Institutions
Finance Program, Business and Economic Faculty Universitas Kristen Petra
Siwalankerto 121-13
Surabaya

Abstract
Personality traits are characteristics that frequently surface and describe the behavior of an individual, such as sensation seeking, locus of control, and ambiguity tolerance. The purpose of this study is to test the effects of personality trait towards financial risk tolerance in investors in Surabaya. Data is taken with purposive sampling technique through questionnaire given among the populace in Surabaya. Sample criteria is those who are in the working force, aged 18 to 55 years, and already had an investment for their future according to their risk tolerance. Data processing is done using SEM-PLS to 100 respondents. Study results have determined that sensation seeking and ambiguity tolerance significantly affects financial risk tolerance. Locus of control, however, do not affect investors- financial risk tolerance in Surabaya. This shows that a heightened stimulation in investors towards risk tolerance encourage them to act boldly on risks. Although, limited and unclear informations received by investors encourage the acceptance of ambiguity, hence creating a discomfort of uncertainty to the results achieved. Furthermore, the ability of self-control shows no relevance to financial risk tolerance. These condition shows all the more important are studies related to financial behavior, to better undertand personality traits of financial actors to minimize making a biased decision.

Keywords
sensation seeking, locus of control, ambiguity tolerance, financial risk tolerance

Topic
Social and Economic Issues

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

Corresponding Author
Anandya Elsa Arira

Institutions
Post Graduate School, Universitas Airlangga
Jalan Dharmawangsa 30, Surabaya 60286, Indonesia

Abstract
Bamboo boats are a means of transportation that began to develop along with technological advances. In addition, this is an effort to reduce the use of wood needed for deforestation. The application of bamboo boats must be with regulations regarding the safety or feasibility requirements of the ships sea associated with the safety of both goods and passengers. Thus, empirical research methods are the choice for reviewing these regulations. The incorporation of articles on Government Regulation Number 51 of 2002 concerning shipping and Shipping Law Number 17 of 2008, Ministerial Regulation Number 65 of 2009 concerning non-convention ship standards, and research on the nature of bamboo against water can be in accordance with the provisions.

Keywords
Bamboo boats; Seaworthiness; Safety

Topic
Urban Ecosystem, Habitats and Sustainability

Link: https://ifory.id/abstract/ZtXw4nhCH7Qb

Corresponding Author
Ni Ketut Yuliana Sari

Institutions
(a) Postgraduate School Universitas Airlangga
Jalan Airlangga No. 4-6, Airlangga, Gubeng, Surabaya, Jawa Timur 60115, Indonesia
*ni.ketut.yuliana-2018[at]pasca.unair.ac.id

(b) Department of Biology, Faculty of Science, Udayana University, Bali
Jalan Kampus Bukit Jimbaran 80361 Bali, Indonesia

Abstract
Antimicrobial resistance has become a public health problem in the world, one of which is Methicillin Resistant Staphylococcus aureus (MRSA). One way to overcome this problem is to find new antibacterial compounds with the use of endophytic fungi. The purpose of this study was to test the antibacterial activity of crude extract of endophytic fungi Aspergillus sp. against MRSA and its contents in the secondary metabolites produced. Endophytic fungi Aspergillus sp. isolated from elephant ginger rhizome (Zingiber officinale var. Roscoe). This research is an exploratory research which is continued with experimental. The antagonist test of endophytic fungi Aspergillus sp. against MRSA produces a inhibition zone of 32 mm. The inhibitory of crude extract of endophytic fungi Aspergillus sp. in the water phase is 13 mm and an ethyl acetate phase is 9 mm. Phytochemical analysis of crude extract of endophytic fungi Aspergillus sp. in the water phase shows the presence of group compounds alkaloids, flavonoids, saponins, and terpenoids. GCMS analysis shows the content of glycidyl oleate (28,44%); didodecyl phthalate (26,67%); cis-13-Octadecenoic acid, methyl ester (20,73%); oleic acid, 3-hydroxypropyl ester (12,98%); 5Hydroxymethylfurfural (4,04%); benzophenone (2,42%); Propanamide, N-ethyl- (2,09%); benzene, nitro- (1,33%) and azulene (1,31%).

Keywords
Antibacterial; Endophytic fungi; Aspergillus sp.; Methicillin Resistant Staphylococcus aureus

Topic
Health and Medicine

Link: https://ifory.id/abstract/4H8mZUWNRArc

Corresponding Author
Muh. Khairul Fatihin

Institutions
1. Graduate Student of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia
2. lecture of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia
3. Graduate Student of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia
4. Graduate Student of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia

Abstract
Zakat Management System in the Industrial Revolution 4.0: Case Study of National Zakat Amil Agency (BAZNAS) of West Nusa Tenggara Province 1 Muh. Khairul Fatihin, 2Sri Herianingrum, 3Muhammad Ubaidillah Al Mustofa, 4Risa Sari Pertiwi muh.khairul.fatihin-2018@pasca.unair.ac.id 1. Graduate Student of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia 2. lecture of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia 3. Graduate Student of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia 4. Graduate Student of Science in Islamic Economics, Faculty of Economics and Business, Universitas Airlangga, Indonesia Abstract This research aims to analyze the management system used by the National Zakat Agency (BAZNAS) during the industrial revolution 4.0. There are challenges in managing zakat that must be solved according to the national standards by zakat institutions. In this case, the researchers took a case study at BAZNAS West Nusa Tenggara Province (NTB). This research is qualitative research that applies triangulation through interviews, observations, and reviews of annual reports to obtain valid primary data. The research also uses secondary data that were collected from books and journals to enrich the analysis. The findings show, in managing zakat on a transparent and accountable basis, BAZNAS NTB uses two systems; they are SIMBA and NTB Baznas System. These two systems are suitable to be applied in the era of industrial revolution 4.0. Even though the two systems have different functions but they complement each other to make the management more effective and efficient.

Keywords
Zakat, Industrial Revolution, SIMBA, NTB Baznas System

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/uwTZ3maHMjhf

Corresponding Author
Adi Priyono

Institutions
a) Post Graduate School - Universitas Airlangga Indonesia
*adi.priyono-2018[at]pasca.unair.ac.id

b) Post Graduate School - Universitas Airlangga Indonesia

Abstract
Democracy is a system of government from, by, and for the people. In Indonesia, democracy lies on the fourth sila of Pancasila (National Principle of Indonesia), Popularism is led by wisdom in representation. The people use their votes in election to choose their representatives and/or even their leader, such Mayor, Governor, and President. This could be called as people power. About two weeks before 2019 Indonesia-s Presidential Election, there was a discourse about people power if there is fraud in the 2019 Indonesian Election. This article discusses about The Renewal of 2019 Indonesian Election Dispute Resolution.

Keywords
People Power; Democracy; Election; Election Dispute Resolution

Topic
The Role of Law in Supporting Sustainable Cities

Link: https://ifory.id/abstract/c7CMAtxbefTQ

Corresponding Author
ni nyoman sumarsini

Institutions
a. Graduate Student of Immunology, Postgraduate School, Universitas Airlangga, Surabaya, Indonesia
Jl. Airlangga No.4 - 6, Airlangga, Gubeng, Kota SBY, Jawa Timur 60115
b. Politeknik Kesehatan Kemenkes Mataram
Jl. Prabu Rangkasari, Dasan Cermen, Sandubaya, Kota Mataram, Nusa Tenggara Bar. 83232

Abstract
The infection is a condition the entry of microorganisms into the body multiply and cause disease. One of the causes of the infection is bacteria, antibacterial gift is one of the elect in dealing with infectious diseases. One of antibacterial from herbal plants, namely cananga flowers with the content of the active compounds that are able to act as an anti-microbial. The methods used to extract compounds rates cananga is extraction. Extraction techniques organic compounds used in this research is macerasion which is used polar methanol solvent. And in order to know the methanol extract compounds gaint the researcher used GCMS analysis. Then tested the sensitivity using methanol extract agains Gram positive and gram negative bacteria. So it is know the resistor power of methanol extract from cananga flowers (Canangium odoratum) against the growth of Gram positive and gram negative bacteria. This research uses observational analytical design using purposive sampling techniques. The results obtained are methanol extract in cananga flowers (Canangium odoratum) and the its resistor power against Gram Positive and gram negative bacteria as a role of antibacterical. The highest compounds in the extract is alpha-Bergamotene with area 22,65 % and the lowest compounds is Alpha, -Copaene and 9.12-Octadecadienoic acid (Z,Z)-, methyl Esther (CAS) Methyl linoleate with area 0.51 %. In addition, the extract is capable to inhibit the growth of Gram positive bacteria (Stapyloccocus aureus) with diameter of the 15 mm. Methanol extract of cananga flowers can only inhibit positive gram bacteria with diameter of the 15 mm.

Keywords
Cananga Flowers, Methanol Extract, Antibacterial Activity Test

Topic
Health and Medicine

Link: https://ifory.id/abstract/9TRZ3WgqLPzM

Corresponding Author
Dania Ulfah Dianti

Institutions
Faculty of Economics and Business, Airlangga University
Jalan Airlangga 4 Surabaya 60286, Indonesia
daniadianti[at]gmail.com

Abstract
Microfinance institutions can be regarded as one of the important pillars in the process of financial intermediation needed by middle-income communities for consumption and production. The development of SMEs will improve Indonesian economy, how BMT sustain for a long time? What factors will make a BMT sustain? This study will discuss the factors that influence sustainability and use qualitative methods of literature study. The results found are Factors Sustainability Cooperatives and BMT are Membership and Leadership, while other factors come from the characteristics of each cooperative and BMT

Keywords
BMT, Sustainability, Cooperative

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/Dp7kZuVvLnQP

Corresponding Author
Nabilah Shafiyyah Rahmayati

Institutions
a. Forensic Science Program, Post Graduate Studies, Universitas Airlangga, Surabaya
b. Department of Anthropology, FISIP, Universitas Airlangga, Surabaya, Indonesia.

Abstract
Forensic anthropology is one branch of forensic science to identify human skeletons. A forensic anthropologist needs to identify the age of the skeleton. The determination of age can be done from analyzing the closure of sutures. This study aimed to determine whether the cranium suture closure is in accordance with what was described in the textbook based on the age group of the cranium. The research sample was all crania in the Anatomy & Histology Laboratory, Medical School, Universitas Airlangga. From 110 crania, there were 62 samples that met our criteria. Our study found that there are 29% of the samples that had a mismatch between the age of the individual and the age of suture closure. From the 62 crania, as many as 71% have an age-matched according to the category of suture closure on the pars vertices suture—S2. It is interesting to mention that there are 24% of the samples who have their S2--pars vertices suture--closure that takes place before the closure of S1--the pars bregmatic suture. We conclude that in the population of Deuteromalayid Javanese, we must realize that not all of the chronological age of the individuals conforms to the textbook. The individual may fall under the 29% that does not fit into the suture closure according to the textbook. We also conclude that there are variations in the sequence of suture closures. This knowledge is relevant when only part of the cranium is found during an identification.

Keywords
suture closure, cranium, age estimate, forensic anthropology

Topic
Law, Police and Forensic

Link: https://ifory.id/abstract/3LgndcCKjH72

Corresponding Author
Widayanti Ishak

Institutions
Postgraduate School, Universitas Airlangga
Jalan Airlangga 4 - 6, Surabaya 60115, Indonesia
*widayanti.ishak-2018[at]pasca.unair.ac.id

Abstract
Self assessment system in regional tax collection gives freedom to taxpayers to calculate themselves and report their taxes to local governments. The tax officer can supervise to test taxpayer compliance. One of the procedures for controlling taxpayers who are not obedient in the city of Surabaya is attaching cross-label stickers to provide a deterrent effect to taxpayers. The purpose of this study was to assess the effect of enforcement measures in the form of attaching stickers to restaurant taxpayer compliance in the city of Surabaya. This research uses qualitative research methods to study the effect of sticker attachment on taxpayer compliance. This research was conducted at The Surabaya Municipal Department of Finance management and Tax. Informants from this study included 10 tax officers in the The Surabaya Municipal Department of Finance management and Tax and several restaurant taxpayers who had been affixed with stickers. From the data that has been obtained and carried out the analysis, it is found that the results are quite significant that controlling restaurant taxes through sticker attachment is very influential on taxpayer compliance in an effort to increase regional income from the restaurant tax sector.

Keywords
Tax; Compliance; Self assessment system; Regional income; Behaviour

Topic
Human Resource Development

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

Corresponding Author
Marsha Karina

Institutions
Airlangga University
Faculty Of Economics and Business
MASTERS STUDY PROGRAM MANAGEMENT
Jl. Airlangga 4 – 6 Surabaya – 60289
Telp.: (031) 5011956, 5011957 (ext. 204)

Abstract
The growth of the fashion industry expanded rapidly in the last 20 years due to population growth, the development of purchasing power in some countries and the development of fashion in Western countries (Khurana et. al, 2017). At the same time, corporate realize customers are increasingly sensitive to the value of products and services. Especially the high-end customers targeted by the exclusive products (Oxborrow et.al , 2014). Issues such as hiring workers under age, the use of harmful chemicals, environmental damage gained great attention for the consumer as well as the NGO (Non-Government Organization). Company can handle this issues by implementing sustainability strategies into their supply chain. Currently, discussions about how the company was able to formulate a sustainability strategy gives a new view both in terms of social, environmental and economic. The formulation of the strategy with the approach of sustainability in supply chain management involves the implementation of both in terms of environmental, social, and economic (Khurana et. al, 2017). Unfortunately the application of this strategy is quite difficult. The fashion industry is an industry with a relatively short life cycle, complex, and had the supply chain makes a fragile strategy sustainability difficult to implement. This journal will be discussed strategies that can be applied by the fashion company at various levels. The strategy includes an sustain strategy at the stage of the development of new products, the provision of raw materials, manufacturing, logistics, retail, and after sales.

Keywords
Supply chain management, sustainability, fashion, strategies

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/U7g3w2rHaJ48

Corresponding Author
Ria Setiawati Patinggi

Institutions
a) Postgraduate School, Universitas Airlangga
Jalan Airlangga 4-6, Surabaya 60115, Indonesia
*ria.setiawati.patinggi-2018[at]pasca.unair.ac.id
b) Faculty of Health Science, Universitas Setia Budi, Jalan Letjen Sutoyo, Surakarta 57127, Indonesia

Abstract
The thyroid gland is one of parts of body that is rare to become malignancy. However, among the endocrine glands, the thyroid malignancy is the most common type of malignancy. The exact causes of thyroid cancer has still been not known yet. Some say because of hereditary disease, infection of virus, environmental factors, wrong lifestyle, or wrong dietary habit. The purpose of this research, to provide an overview about The Prevalence of Thyroid Cancer by Age and Sex at Dr. Moewardi Hospital Surakarta 2017. One of risk factors in thyroid cancer such as age and sex. Thyroid cancer is a malignancy in the thyroid that has four types: papillary carcinoma, follicular carcinoma, medullary carcinoma, and anaplastic carcinoma. This research used descriptive method with cross sectional design, and secondary data that was taken from the medical records of thyroid cancer patients at Dr. Moewardi Hospital for period January to December 2017. The result of this research indicated from 76 medical record data of patients with thyroid cancer at Dr. Moewardi Hospital for period January to December 2017, thyroid cancer mostly occurred in women with histological types of Papillary Carcinoma Thyroid, and age between 60-67 years.

Keywords
Thyroid Cancer; Prevalence; Age and Sex

Topic
Health and Medicine

Link: https://ifory.id/abstract/HfLWzwvTr6mK

Corresponding Author
Abu Bakar

Institutions
Fakultas Ekonomi dan Bisnis Universitas Airlangga
abu.bakar-2017[at]pasca.unair.ac.id

Abstract
In this paper, we explain how the role of Baitul Maal in managing fiscal policies in Islamic macroeconomics. With descriptive methods and historical approaches, this paper reviews the management of baitul maal in regulating Islamic fiscal policy, using several sources of literature, so that this study is categorized as library research.

Keywords
Keyword: Baitul maal, fiscal policy

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/WagCKJtE94d2

Corresponding Author
Tika Widiastuti

Institutions
a) Faculty of Economic and Business, Universitas Airlangga, Airlangga 4-6, Surabaya 60286, Indonesia
*tika.widiastuti[at]feb.unair.ac.id

Abstract
The purpose of this study is to analyze economic and entrepreneurship empowerment model in Hidayatullah Islamic boarding institution in East Java. By using qualitative approach with study case method, data analysis technique conducted is descriptive method, this is a pioneering study regarding entrepreneurship based economic empowerment model in Hidayatullah as a leading Islamic boarding institution and religious organization in East Java. This research found that Hidayatullah as Islamic boarding institution plays a role as not only an Islamic educational institution but also a society economic empowerment. It also increases economic independence by fostering entrepreneurial spirit among administrators and students. The existing model of entrepreneurship based economic empowerment in Hidayatullah is replicable in similar institutions.

Keywords
Model; Empowerment; Entrepreneurship;Islamic Boarding Institution

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/VHvL6rZ9qmTX

Corresponding Author
Okyviandi Putra Erlangga

Institutions
(a) Faculty of Economics and Business, Universitas Airlangga
Jalan Airlangga 4 Surabaya 60286, Indonesia
okyviandiputra[at]gmail.com
(b) Faculty of Economics and Business, University of Jember
Jember 68121, Indonesia

Abstract
Indonesia is a country that has the most Muslim population in the world. This has implications for the large number of mosques that spread from urban to rural areas. This is what drives practitioners of Islamic finance to empower the function of the mosque by forming a Baitul Maal wa Tamwil (BMT) and known as the Mosque-Based BMT (MBB). Currently, MBB is slowly being established in a number of regions in Indonesia, especially in rural areas that have not been reached by financial institutions. Due to its location, MBB offer different financing models from BMT in general. This occurence drives the writer to summarize what financing models can be applied in distributing MBB funds to members, as well as finding the ideal financing model according to the MBB conditions. The author finds a couple of financing models can be applied to MBB, but financing models that has the lowest risk of loss needs to be considered. Participation-based financing such as Musharaka and Mudaraba contracts are seen as having a lower risk than other financing models.

Keywords
Mosque-Based BMT, Financing Models

Topic
Social and Economic Issues

Link: https://ifory.id/abstract/F6ZhL3ubDqya

Corresponding Author
Ian Firstian Aldhi

Institutions
Student of Master Program Study of Human Resource Development, Postgraduate School of Universitas Airlangga, Jl. Airlangga No. 4-6, Surabaya, Indonesia
e-mail : ian.firstian.aldhi-2018[at]pasca.unair.ac.id

Abstract
Development activities and the rapid advancement of technology in the industrial revolution era 4.0 in various fields have and will continue to have positive impacts and negative impacts on the environment. Sahabat Bumi is an environment-based community / community organization with a diverse background of Sahabat Bumi members, including: entrepreneurs, civil servants, lecturers, teachers, company employees, and so on. The purpose of this study is to identify the characteristics of developing the personality of Sahabat Bumi members through community development activities. This study uses a qualitative approach with descriptive methods. The results of this study are expected to be useful for community development research.

Keywords
Personality, Personality Development, Community Development

Topic
Human Resource Development

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