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811	Management Science	ABS-710
SERVICE QUALITY FACTORS: THE EFFECT OF WEB NAVIGATION ON ONLINE TRANSFORTATION IN INDONESIA T Mulyana, W Susilawati, W Wufron, N Mardani Universitas Garut Abstract SERVICE QUALITY FACTORS: THE EFFECT OF WEB NAVIGATION ON ONLINE TRANSFORTATION IN INDONESIA T Mulyana, W Susilawati, W Wufron, N Mardani Management Departement, Universitas Garut Jl. Raya samarang 52A, Garut, Indonesia E-mail: tatang.mulyana@uniga.ac.id Abstract. The purpose of this research to analyze the service quality of online transportation an area in Indonesia, seen from consumer perceptions, and map service quality attributes based on consumer perceptions. The research method used in this research is Service Quality Analysis (SERVQUAL) and Importance Performance Analysis (IPA). The population in this research is online transportation consumers, who have used a go ride service at least 1 time. The sampling used in this research was sampling quota of 200 respondents. The results of this research indicate that overall there is a gap between performance values with consumer expectations of -0.5, so it can be assumed that the service quality of Gojek in the region according to consumer perceptions is quite good. Based on the results of the mapping it was found that the factor of ease of web navigation became one of the factors of the services quality of online transportation. So that these factors must be a concern of the company. Keywords: consumers, navigation website, service quality PermaLink | Plain Format | Corresponding Author (Wati Susilawati)

812	Management Science	ABS-974
The Prevalence of Asthenopia in Visual Display Terminal (VDT) Operators at Federal International Finance (FIF) Group of Bali I Putu Oka Primantara1, Sagung Putri Permana Lestari Murdhana Putere2 Universitas Warmadewa Abstract Abstract The desire to create the best possible work, increased demands such as accuracy and speed of work cause employees to stay in front of the computer for long periods of work, so that it may be at risk of asthenopia disturbance. One of the occupations that are at risk for impaired asthenopia are employees who use computers at the Federal International Finance (FIF) Group Bali. This study aims to determine the percentage of asthenopia disorders based on asthenopia symptoms experienced. This research uses descriptive method with cross-sectional approach. The variables included asthenopia disorders, age, gender, VDT settings, screen filters, duration of work, and rest duration, room and angle lighting formed between the top of the monitor and the midpoint of the screen. The sample of this research is all employees who use computer in FIF Group Bali. Data collection in this study using Computer Vision Questionnaire using Likert scale that has been validated. Data were analyzed descriptively with univariate computer aid. The result of the research showed that the most common complaint was headache as many as 38 respondents (79.16%). The incidence of asthenopia in the age group of 21-40 years was a headache of 28 respondents (58.4%), and at the age of 41-60 years was a headache of 10 respondents (20.9%). Based on sex, the prevalence of asthenopia in males is headache as much as 21 respondents (43.8%), in women is close blurry vision as much as 17 respondents (35.5%). The highest prevalence of asthenopia in room lighting settings <200 lux was headache as much as 19 respondents (39.6%), while in room lighting 200 lux-500 lux was blurred vision with as many as 10 respondents (23%). Keywords: Keywords: asthenopia, VDT operator, computer vision questionnaire, FIF Group Bali PermaLink | Plain Format | Corresponding Author (Mirsa Umiyati)

813	Management Science	ABS-464
e-Commerce: The Booster for Brand Advocacy Ratio in Asia Intan Permana (a*), Sukma Nugraha (b) Universitas Garut Abstract Brand advocacy ratio is one of the marketing productivity measures that can be applied in various industries. In the present study, the authors examined the role of ecommerce in raising customers brand awareness, encouraging purchase, and promoting the brand of Apple in Asia. This study was conducted through a survey on 30 respondents. It was revealed that Google’s search engine managed to raise the Apple brand awareness to the highest level, namely top-of-mind awareness. In addition, the availability of Apple’s products in marketplaces such as Amazon, Shopee, and Lazada was proven to promote sales in Asia. One of its websites www.support.apple.com was proven to increase its brand advocacy ratio because of its comprehensive product information, help service, and information on the nearest Apple’s stores. In today’s digital era, marketing productivity in the form of brand advocacy ration could be improved by search engines (e.g., Google), marketplace (e.g., Amazon, Shopee, and Lazada), and corporate websites. Keywords: e-Commerce; Marketplace; Website; Brand awareness; Purchasing; Brand advocacy ratio PermaLink | Plain Format | Corresponding Author (INTAN PERMANA)

814	Management Science	ABS-728
PROFESSIONAL TRANSITION POLICY AS A SOLUTION OF CASHLESS POLICY SEEN FROM HR PSYCHOLOGY IN. JASA MARGA CAB. PURBALEUNYI Angga Dewi Anggraeni Politeknik Pos Indonesia Abstract e-Toll is an electronic card used to pay for toll road entry fees in parts of Indonesia. E-Toll users only need to attach a card to pay the toll in 4 seconds, faster than when paying in cash that takes 7 seconds. The use of e-Toll also reduces operational costs because only costs are needed to collect, deposit and transfer cash to and from the Bank. In addition to being the first step in modernizing money collection, the use of e-Toll is also intended to reduce violations because toll officers do not receive payments directly. However, the policy of using e-Toll on the toll road certainly has an impact on the number of employees at the toll booths, which are not small. The situation as described above occurs at PT. Jasa Marga Purbaleunyi branch which is engaged in services, especially Toll Road maintenance services. In this case the author is interested in knowing more about the Professional Transfer Program and its influence on employee psychology at PT. Jasa Marga Cab. Purbaleunyi. PT Jasa Marga establishes a cashless policy or the implementation of a non-cash payment system which is a direct program from the government. With the existence of this policy, Jasa Marga issued a Professional Transfer policy for employees at the Toll Gate. Based on research results, 82% of the Toll Gate employees who participated in this program felt that Professional Transfer was the right solution for employees affected by the cashless policy. So it was concluded that the Professional Transfer Policy was the right solution in dealing with cashless policies. Keywords: Profession Transfer. Cashless Policy. e-toll PermaLink | Plain Format | Corresponding Author (Angga Dewi Anggraeni)

815	Management Science	ABS-235
Overview of Drug Availability and Influencing Factors in Several Low, Lower and Upper- Middle Countries: A Systematic Review (a)* Elmiawati Latifah, (b) Susi Ari Kristina,(c) Sri Suryawati,(b) Satibi (a) Doctoral Program in Pharmaceutical Science, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta (a) Department of Pharmacy, Faculty of Health Science, Universitas Muhammadiyah Magelang, Magelang (b)Department of Pharmaceutics, Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta (c)Department of Pharmacology and Therapeutics, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta Abstract Drugs are vital to saving and improving public health. However, medicines are often not available at the facility because stocks run out or in particular, pharmaceuticals are not available due to a shortage of supplies. Implementation of pharmacy services should ensure safe, quality, usable and affordable availability drug. A systematic review was conducted to identify related studies. Electronic databases used to identify relevant studies are, ScienceDirect, Plos, PubMed and Google Scholar. This study is limited to English and publications from 2007 to 2017. The electronic database search earned 33 articles while only six studies met the criteria for review. There is the relatively low availability of drugs in some developing countries and the average availability of generic drugs is better than Innovator Brand drugs, especially in the public sector. Most of the factors that may affect drug availability are related to government policies to improve drug access and lower prices so that national drug policy review in each country is required. Overall, the method used to measure the availability of drugs using a refer ence method used by WHO Health Action International. The availability of drugs in low, lower and upper middle countries still need to be improved by increasing drug access and enhancing prices by using appropriate government policies. The WHO HAI method is effectively used to measure the availability of drugs by using the core drug and supplementary drug references by the established reference. Keywords: Drug Availability, Overview, Influencing Factors, Several Low, Lower and Upper-Middle Countries. PermaLink | Plain Format | Corresponding Author (Elmiawati Latifah)

816	Management Science	ABS-1003
Modeling System of Horticultural Commodity Development in Pinggan Village, Bangli Regency, Bali Province I Gusti Bagus Udayana*, Luh Kartini, Yohanes Parlindungan Situmeang, L Ketut Sunadra Faculty of Agriculture. Warmadewa University, Denpasar, Bali, Indonesia *E-mail address: bagusudayana64[at]gmail.com Abstract Pinggan Village area is an area that has great horticulture and tourism potential. This area is located in District Kintamani Bangli Regency. Pinggan village is located in the highlands with an altitude of 900-1300 m above sea level and has the potential of horticultural commodities of squash, tomato and chilli. The current condition, about 30% of the product is wasted as waste (rotten or exposed to pests), bargaining farmers are weak, cultivation is not optimal, there are exarat supply because it is unable to compete with producers from Java. The proposed activities are for the development of horticulture based agroindustry in Pinggan sub-district of Kintamani sub-district with various activities The results of the research are expected to have a significant effect on the increase of income, thus increasing the access of households to family food. Physically, no puteran on the plate, will pilaru entangled papier. Besides, by increasing agro-industry activity and sustainable food house will have an impact on economic growth and job opening so that it will increase food security. Keywords: Agroindustry, horticulture, derivative products, Kintamani, Sustainable Food House (KRPL) PermaLink | Plain Format | Corresponding Author (I Gusti Bagus Udayana)

817	Management Science	ABS-1010
Correlation Accountability, Transparency and Community Participation in Financial Management of Development Jaurino (a), Endang Kristiawati(a), Risal(a), Sartono(a), Wilda Sari(a), Lusy Tunik Muharlisiani (b*) a)Departement Accounting Faculty of Economic at Universitas Panca Bhakti Pontianak, Indonesia Jl Kom Yos Sudarso, Pontianak, Indonesia jaurino+endangkristiawati+risal+sartono+wildasari[at]upb.ac.id b*)Department of English Education at Universitas Wijaya Kusuma Surabaya Indonesia Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia lusytm_fbs[at]uwks.ac.id Abstract The purpose of this research was to analyze of financial management on transparency, accountability and community participation in development. The method used quantitative research, the independent variables consisting of transparency (X1), accountability (X2) and community participation (X3), and the dependent variable is development (Y), the follow up data analysis used is multiple regression which begins with testing validity and reliability and performs tests of normality, multicollinearity, autocorrelation and heterokedacity. The results showed that the three independent variables consisting of Transparency (X1), Accountability (X2) and Community Participation (X3) towards the dependent variable namely Development (Y) had a positive effect with the regression equation Y = 2,087 + 0,283X1 + 0,441X2 + 0,311X3 + e, and sig value X1= 0,044 , X2= 0,000 , and X3= 0,034. Thus, financial management carried out through transparency, accountability and support through community participation can influence development and make an area develop more independently Keywords: Transparency; Accountability; Community Participation; Development PermaLink | Plain Format | Corresponding Author (Risal Jaurino)

818	Management Science	ABS-244
Does Online Viral Marketing Contribute to the Tourists Intention to Visit a Destination? Rahyuniati Setiawan, Intan Permana, Asri Solihat, Galih Abdul Fatah Maulani, Nizar Alam Hamdani Universitas Garut Abstract The background of this study is the decline in the tourist visits to Sabda Alam Water Park in Garut. Viral marketing plays an important role in raising brand awareness and may affect tourists intention to visit a tourism object. The purpose of this study was to examine the influence of viral marketing on brand awareness and tourists visiting intention. To this end, an explanatory survey was conducted on a sample of 100 visitors to Sabda Alam Water Park selected using a proportionate random sampling technique. Data analysis was performed using path analysis by means of SPSS 21. The results showed that viral marketing had significant positive influence on brand awareness. It was also revealed that brand awareness dan viral marketing had positive influence on tourists visiting intention. Keywords: viral marketing, brand awareness, tourists visiting intention PermaLink | Plain Format | Corresponding Author (Rahyuniati Setiawan)

819	Management Science	ABS-247
Strategic Planning for Mosque Management Information Systems in Indonesia Galih Abdul Fatah Maulani; Nizar Alam Hamdani; Lindayani Universitas Garut Abstract Anticipating the era of Society 5.0, communities and organizations are required to have integrated and comprehensive information access, including the management of mosques in Indonesia. This study aims at providing a strategic planning in the form of a portfolio for future application of mosques management information system services. This study was conducted with reference to Ward and Peppards strategic planning for information systems, which included SWOT analysis, value chain analysis, critical success factor method, balanced scorecard method, and McFarlans strategic grid. The results showed it is necessary for the mosque management to have several applications, mapped into 4 quadrants (strategic, high potential, key operation, and support). It is expected that this application portfolio can help managers of mosques in Indonesia provide faster, more accurate and more accountable information. Keywords: Strategic Planning; Mosque Management Information Systems; Society 5.0 PermaLink | Plain Format | Corresponding Author (Galih Abdul Fatah Maulani)

820	Material Engineering	ABS-514
Characteristics of Composite Wood Powder, Coconut Fiber and Green Clam Shell for Electric Motorcycle Brake Pads Ahmad Kholil, Siska Titik Dwiyati, Agus Sugiharto, I Wayan Sugita Department of Mechanical Engineering Education, Engineering Faculty, Universitas Negeri Jakarta, Kampus A Jl. Rawamangun Muka, Jakarta, 13220, Indonesia. Email: ahmadkholil[at]unj.ac.id Abstract The study aims to determine the composite characteristics of wood powder, coconut fiber, and green mussel shells that will be used as material for electric motorcycle brake pads. Composites are made with three variations. The first sample (SK30K10CK10) consisted of 30% wood powder, 10% coconut fiber, 10% green clam shell and 50% polyester resin. The second sample (SK20K20CK10) consisted of 20% wood powder, 20% coconut fiber, 10% green clam shell and 50% polyester resin. And the third sample (SK10K30CK10) consists of 10% wood powder, 10% coconut fiber, 10% green clam shell and 50% polyester resin. All samples were tested for hardness and thermal testing. The test results are compared with commercial electric motorcycle brake materials. Based on the test results that the highest level of violence is owned by SK20K20CK10. The results of the specimen samples show that the highest decomposition point is the SK30K10CK10 specimen. Keywords: composite, coconut fiber, wood powder, green clam shell PermaLink | Plain Format | Corresponding Author (Ahmad Kholil)

821	Material Engineering	ABS-7
Corrosion Assessment of a Leakage Pipeline in the Seabed: A Case Study M.C. Fatah (1*), A. Diaz (2) & A.Darwin (3) (1) STT PLN, Jakarta, Indonesia, (2) Wood Group Kenny, Jakarta, Indonesia (3) Wood Group Kenny, Perth, Australia Abstract A pipeline in the seabed was successfully commissioned and had commenced production from the well. The pipeline has life time design for 20 years. However, a leakage from the flange connection was detected a couple months after start of production. The pipeline was isolated by closing the valves on the line tee, and shutdown the well production. This condition remains for 6 months before any remedial action taken. During that period, it is believed that there is any corrosion mechanism occurred which could reduce the pipeline integrity. The paper briefly described the corrosion threats and assessed the corrosion rate of the leakage pipeline with limited information of factors that affecting corrosion rate. Additionally, recommendations for preparation of the pipeline to minimize internal risks are given. Keywords: pipeline, seabed, leakage, corrosion threats, corrosion mechanism PermaLink | Plain Format | Corresponding Author (Martin Fatah)

822	Material Engineering	ABS-785
Fabrication and characterization of DSSC using TiO2-reduced Graphene Oxide Nanocomposite as Photoanode Syukur Daulay*, Akhmad Herman Yuwono, Alfian Ferdiansyah Madsuha Departemen Teknik Metalurgi dan Material, Fakultas Teknik, Universitas Indonesia *syukur.daulay71[at]ui.ac.id Abstract One of the easy and cheap solar cell is Dye sensitized solar cell (DSSC) that use dye to harvest sun’s energy. It has drawback in low efficiency because of electron recombination occurrence and low transparence of photoanode. Reduced graphene oxide as derivative of graphene was hoped to overcome the problems. This research is aimed to study the effect of nanocomposite Titanium Oxide-reduced Graphene Oxide (TiO2-rGO) as photoanode to the efficiency by varying the percentage of rGO that fabricated by Hummer’s Method. The rGO from Graphite is successfully fabricated that confirmed from FTIR and SEM and TiO2-rGO nanocomposite has been fabricated and characterized using UV-Vis. The nanocomposite has been used as photoanode that affect the efficiency. The result shows the effect of percentage of rGO on the performance. The efficiency of solar cell is measured using solar cell simulator and give result for 0% rGO resulted 1.45 % efficiency and 0.664% that for 1% rGO. The moderate result is 2% of rGO that resulted 0.9 % efficiency. The pattern is not regular but the effects is counted Keywords: DSSC, Nanocomposite, rGO, efficeincy PermaLink | Plain Format | Corresponding Author (Syukur Daulay)

823	Material Engineering	ABS-820
Effect of Salt Quenching on the Microstructures and Mechanical Properties of AISI 1045 Steel Imam Basori*, Wiworo Dwi Pratiwi and Siska Titik Dwiyati Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia *unimam_r_one[at]yahoo.com Abstract Steel has a very important role in the industrial application, especially for the manufacture of automotive components such as gears. In its application, gear undergoes the compressive and friction loads, so that in the manufacturing process, materials with high hardness and wear resistance are needed. One method to increase steel hardness is by quenching process. In this research, quenching process will be carried out on AISI 1045 steel using the salt water as the cooling media. The austenization process was conducted at a temperature of 850 ° C with the holding time of 15 and 30 minutes. The samples were then salt quenched with the salt concentration of 0, 10 and 23%. The results showed that the salt quenching process on AISI 1045 steel tended to change the combination of ferrite and pearlite phases to be martensite. This process also increases the hardness of AISI 1045 steel, in which the highest hardness value is found in the sample with 30 minutes austenization process and salt concentration of 23%. In contrast, this sample have also the lowest impact resistance value of 0.056 J / mm2. Keywords: salt quenching; austenization; ferrit; pearlite; martensite PermaLink | Plain Format | Corresponding Author (IMAM BASORI)

824	Material Engineering	ABS-590
Characterization of Nano Ceramic Composite of Mullite-Magnesia-Yttria Stabilized Zirconia System Budi Lukman Hakim Sekolah Tinggi Teknologi Garut Abstract The oxide and nano ceramic system of Mullite-Magnesia-Yttria Stabilized Zirconia were studied. Some fracture toughness models were examined to evaluate crack length parameter whether comply with Palmqvist and median crack criteria at c/a ratio equal to 3.0. The mullite crystal structure was observed using SEM and looks likely needle, whereas 3YSZ crystal appears smoother. Through EDS analysis, it detected the oxides in Mullite system i.e. Al2O3, and SiO2. With similar method, some oxides were observed in the Mullite-Magnesia-3YSZ system such as MgO, Al2O3, SiO2, Y2O3 and ZrO2. With XRD analysis, nano MMZ system shows containing Al6Si2O13, Corundum (Al2O3), Zirconia (ZrO2), and Quartz (SiO2). Fracture toughness KIC of the ceramic composite of nano mullite-magnesia-zirconia complies with Palmqvist and median crack criteria. Nano ceramic particle shows higher value of hardness and fracture toughness while compared with oxide ceramic system. Keywords: Fracture Toughness, Mullite, Nano ceramic composite, Yttria Stabilized Zirconia PermaLink | Plain Format | Corresponding Author (Budi Lukman Hakim)

825	Material Engineering	ABS-599
ENGINEERING COMPOSITE MATERIALS AS RADAR WAVE ABSORBERS Nurul Fatia Jannah, SST. (a*), Kolonol Kes. Dr. Sovian Aritonang S.Si., M.Si. (b) a) Student of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University *nurul.jannah[at]tp.idu.ac.id b) Teacher of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University Abstract ENGINEERING COMPOSITE MATERIALS AS RADAR WAVE ABSORBERS - The latest technological developments make a fighter aircraft capable of entering enemy territory without being detected thanks to material engineering carried out with a combination of two or more materials with different characters in each constituent component to obtain a new element with characteristics as desired. This research was conducted using the analytic hierarchy process (AHP) method that compares the character of materials to be used on stealth aircraft. Data is obtained through literature studies, and secondary data use. The composite material was chosen as the material used in stealth fighter aircraft, as the anti-radar fighter aircraft, considering the nature of its properties which makes the aircraft structure stronger and lighter and meets the STWR standard (strength to weight ratio) as a comparison between strength and mass the material itself. Keywords: Material Engineering, Composite, Radar Absorber, AHP PermaLink | Plain Format | Corresponding Author (Nurul Fatia Jannah)

826	Material Engineering	ABS-605
Preparation and Characterization of Seaweed (Eucheuma Cottonii) Based Bioplastic Blended with Polysaccharides Derived from Various Seeds of Avocado, Jack Fruits and Durian Yusmaniar (a*),Devi Indrawati Syafei (a), Mutiah Arum (a), Matthew Ryan Asali (b) a)Departement of Chemistry Faculty of Match and Science Universitas Negeri Jakarta, Jln Rawamangun Muka, Jakarta Timur 13220, Indonesia b) National High Jakarta School Jln. Raya Pos pengumben no.41 Jakarta 11630, Indonesia *Email : yusmaniar[at]unj.ac.id  Abstract Anticipating the global trends of biodegradable plastic and its application to packaging industries, this study was conducted to prepare a seaweed ( Eucheuma cottonii ) based biodegradable plastic blended with polysaccharides derived from various tropical fruit seeds which are abundantly available in Indonesia such as avocado, jack fruits and durian. The objective is to prepare an environmentally friendly and edible bioplastic. The various polysaccharides was obtained through extraction and the bioplastic blends were heated at 80oC for 30 minutes.  The characterization conducted include mechanical properties, thermal and biodegradability analysis, spectral and surface analysis through Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) respectively. Keywords: Bioplastic; Edible; Polysaccharides; Seaweed (Eucheuma cottonii) PermaLink | Plain Format | Corresponding Author (Yusmaniar Yusmaniar)

827	Material Engineering	ABS-867
The Addition of Midrib Bananas and Kwikseal as LCM Against the Character of Physical Mud at High Temperatures in The scale of The laboratory Pauhesti, Abdul Hamid, Chrisnantyo Agam Anggoro Teknik Perminyakan Fakultas Teknologi Kebumian dan Energi Universitas Trisakti Abstract Drilling mud have a very important role in a drilling operations, start over drilling until it reaches the depth of the intended. In the importance of drilling mud, therefore there should have an analysis of potential problems that might happen in the process of the drilling. The Problems that might happen in the process of drilling one of them is about the loss circulation. To overcome the problem of lost circulation mud , one example is a method of loss circulation material (LCM).There were different LCM category but in this study used Kwik seal and the midrib bananas as an ingredient LCM. Both of them have the fibrous having the nature of stiffness so it can clog the pores. In research was done three times experiment with the additional kwik seal and adding different banana midrib .This study using specification of physical properties and rheology standard of a mud field drilling to get results like the environment actually on the ground .The results of research is expected us to know how much composition kwik seal or the midrib bananas to be added to the mud and effective to overcome lost circulation . Keywords: kwik seal , banana midrib , fibrous , drilling mud, LCM PermaLink | Plain Format | Corresponding Author (Pauhesti Pauhesti)

828	Material Engineering	ABS-868
UNLOCKING HIDDEN POTENTIAL OF SHALLOW RESERVOIR AT 1955-2342 mSS, IN RUHOUL FIELD Lestari1, Abda Anwaratutthifal1, and Reno Pratiwi1 Petroleum Engineering Departement, Trisakti University, Jl. Kyai Tapa No.1 Jakarta Barat Abstract Ruhoul is an offshore gas field that located in Mahakam Delta, East Kalimantan, Indonesia. It covers an area of 350 km2 and has a gross thickness of the payzone over 2000 m. Structural architecture of Ruhoul field is multilayered un-faulted anticline. Stratighraphycally, Ruhoul reservoirs are divided into two intervals which are Ruhoul Main Zone and Ruhoul Shallow. This study is only focused in Shallow zone area, they are Sh-8a, Sh-8c, and Sh-8d, as it is considered as remaining prospective area for Ruhoul field. For more specific, Sh-8a was produced by wells RJ-16A-M and RJ-2G-M.T3, Sh-8c was produced by well RJ-2G-M.T3, and Sh-8d was produced by well RJ-2G-M-T3. Over time, the gas production in Ruhoul Field keep decreasing, therefore hidden gas production potential needs to be re-evaluated. The evaluation can be done by doing the dynamic synthesis analysis based on completion type used, production history, and well correlation. The main objective of this study is to evaluate hydrocarbon potential in Ruhoul Shallow specific area. Several approaches will be used to assess Ruhoul Shallow zone prospect such an updated database, zone change inventory, and well correlation based on netpay map by layer with software Geolog 7.2. Perform Dynamic Synthesis Analysis and P/Z Straight Line Material Balance Calculation are chosen as the methodology to assess the prospect zone of this field. The results of this process are candidates to be the re-opening zone, the value of GIIP, EUR, RR, RF, the drive mechanism, and plateau rate stage that applied to each layer. The candidate layer to open is Sh-8a at RJ-2G-MT3 and GIIP is 1.1517 Bscf. Keywords: Dynamic Synthesis Analysis, P/Z Straight Line, Plateau Rate Stage PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

829	Material Engineering	ABS-614
Analysis Of Jacket Pile Failure At Breasting Dolphin Pile On Berthing Dolphin System Budi Lukman Hakim Sekolah Tinggi Teknologi Garut Abstract Jacket pile is a corrosion protection system that is applied to ASTM 252 steel piles in the tidal and splash zone area of the Jetty. In this system the vessel is leaning on the breasting dolphin (BD). There has been damage to 9 new pile jackets installed and operated for several days in February 2018 on BD. damage occurs in the front position of the pneumatic fender direction of the vessel leaning. analysis is carried out using observation, inspection and simulation methods. the results of the analysis of the causes of damage to the jacket pile is due to vertical collisions and loads from the pneumatic fender. the visual simulation it can be predicted that when the ship rests near BD, the backrest will be held by a pneumatic fender, so that the floating fender will pound and press the pile jacket with mashing energy of 13.88 t.m, both in a shock, swing perpendicular and vertical to the pile BD. To prevent the recurrence of similar cases, it is recommended to use a BD Guard to protect the pile and jacket pile of BD from direct collisions and friction from pneumatic fenders and barges. Keywords: Breasting Dolphin, Corrosion Protection, Failure Analysis, Jacket Pile, Jetty PermaLink | Plain Format | Corresponding Author (Budi Lukman Hakim)

830	Material Engineering	ABS-132
Graphite Surface Profile with Different Polishing Treatment Bentang Arief Budiman1,2 and Poetro Lebdo Sambegoro1,2 1Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Ganesha street no. 10, Bandung 40132, Indonesia 2National Center for Sustainable Transportation Technology, Indonesia Abstract Graphite is a fascinating material to study in nanotechnology. Surface profile and roughness of the graphite are some of the most important parameters to determine many physical and mechanical behaviors including friction or bonding condition. To acquire certain surface profile, mechanical polishing treatment is one of the easiest ways that can be applied. In this work, graphite is polished by three different grades of sandpapers (P800, P400, and P220) and cellulose-based paper. The surface properties are observed by a laser microscope and various surface roughness parameters were quantified. The sequential polishing process employed in this work is able to reduce the surface roughness and might improve the physical properties. This work sheds light on the importance of the mechanical surface treatment on graphite. Keywords: Graphite, surface profile, surface roughness, mechanical treatment, polishing PermaLink | Plain Format | Corresponding Author (Bentang Arief Budiman)

831	Material Engineering	ABS-902
ANALYSIS OF INJECTOR SPRING DAMAGE TO DETERMINE MAINTENANCE MANAGEMENT DIESEL ENGINE AT PLTD AMPENAN Wilarso (a*), Tri Wibowo (b), Bambang Teguh (b), Mujiarto (c*) a) Postgraduate Students, Department of Mechanical Engineering, Institut Sains dan Teknologi Nasional, Jl.Moh Kahfi II Srengseng Sawah Jagakarsa, Jakarta Selatan 1264, Indonesia *wilarso09[at]gmail.com b) Department of Mechanical Engineering, Institut Sains dan Teknologi Nasional, Jl.Moh Kahfi II Srengseng Sawah Jagakarsa, Jakarta Selatan 1264, Indonesia c) Department of Mechanical Engineering, Universitas Muhammadiyah Tasikmalaya, Jl. Tamansari Km. 2,5, Mulyasari, Tamansari, Tasikmalaya 46196, Indonesia *mujiarto[at]umtas.ac.id Abstract Diesel Engine in Ampenan PLTD which is operated by PT. X has damaged the injector spring in cylinder #2. After visual inspection, a spiral injector spring was found broken in the lower circle 2. Before the damage is known the cylinder # 2 exhaust manifold is glowing, with a load of 1100 kW. Analysis of the causes of broken spiral spring damage was carried out by visual observation, laboratory analysis microstructure, metallography, and maintenance management analysis. From the test results of broken injector spring damage based on visual observation of spiral springs in circle 2 from below is the initial break first and thinning occurs due to alternating bending loads, and 45o fracture angle is a static fracture propagation with a benchmark at the beginning of the fault. Metallographic and microstructure test results found sulfide and frictional forms. Sulfide content in spiral injector spring microstructure is seen in the whole material quite a lot, possibly making the formation of early fatigue. To minimize the damage, re-design of the spring injector material must be done, and in maintenance management, the injector spring must be checked every and the cam lobe dimensions and wear of the roller lifter every 1000 hours. Keywords: Diesel engine; Exhaust manifold; Glowing; Injector spring; Maintenance management PermaLink | Plain Format | Corresponding Author (Mujiarto Mujiarto)

832	Material Engineering	ABS-904
APPLICATION HALL PLOT METHOD FOR SURVEILLANCE WATERFLOOD IN OIL RESERVOIR Yusraida Khairani, Azizah Hanifah, Rini Setiati Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta Abstract Pattern X is one of the patterns in Field Z which is 60 km west of Prabumulih, South Sumatra, where the full scale waterflood is implemented. In general, the pattern used is an irregular inverted 5-spot where there are six production wells namely Z-091, Z-098, Z-110, Z-157, Z-195, and Z-233 and one injection well namely Z-227. Waterflood is a secondary recovery method by injecting water into the reservoir. Waterflood surveillance analysis was carried out to determine the conditions around the production and injection wells during waterflood. Surveillance analysis is used as a measure of the success in waterflood activities. One of methods that used is the Hall Plot method. It is obtained a slope which moves upward where displacement is moved normally or stable. However, over time there is an increase in the slope of the tilt where skin changes occur. In fact, the slope that occurs due to the installation of Multilayer Packer is used to adjust the desired injection rate. In the end, the injection results have no problems and runs stable. Based on the results of the Waterflood Surveillance Analysis Using the Hall Plot method, it can be concluded that the injection in the Z-227 injection well runs normally or stably Keywords: Hall Plot, irregular inverted 5-spot, Surveillance, Waterflood PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

833	Material Engineering	ABS-905
APPLICATION OF PRESSURE BUILD UP ANALYSIS FOR RESERVOIR OIL Arantia Hillary Sunardi, Rini Setiati , Samsol Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta Abstract The wells analyzed in this Final Project are the A-1 well, T field. Reservoir in this field is gas reservoir with sandstone rock formation, so one of the problems in Field T is the sand problem. Due to the sand problem on well A-1, well test analysis must be done first, to see if there is any damage to the formation if the flow rate is increased.Identification of formation damage in a well can be done by doing Pressure Buildup test. The method used is pressure build up test by Horner method which is done manually and Pressure Derivative with Saphire software v.3.20. The determination of deliverability test was conducted by conventional methods C and n. Given the results of the analysis, the permeability value remains, the value of the skin decreased, and Initial Pressure also decreased. From the results of the tests, there were no significant changes, indicating no formationdamage. The results of the deliverability tests in 2017 decreased, due to initial pressure decrease. Based on the results of well testing, there is no formation damage, so the flow rate can still be increased according to the IPR curve. Keywords: Deliverability, Horner, IPR curve, Pressure Build up, Well testing PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

834	Material Engineering	ABS-907
Heat Energy Conversion on Applied Technology of Geothermal Energy Direct Utilization Untung Sumotarto Geology Engineering Departement , FTKE, Universitas Trisakti , Jakarta Abstract Indonesia has a high geothermal energy resource, preserved in many geothermal fields. But not all fields are potential for indirect utilizations such as for electric power generation. A direct utilization of low potential of geothermal energy resource has been performed at Batukuwung geothermal field, Serang, West Java. A simple design of vegetable grain dryer has been created (constructed) using galvanis metal pipes. A reduction of temperature from 63 degrees Celcius at the heat source to 41 degrees Celcius at the dryer tool through galvanis metal pipes is quite enough for vegetable grain drying purposes. It is quite a prospect simple technology to be applied and developed in Indonesia as a geothermal energy country having various vegetable grain products from various plants such as coffee, corn, peanut and many other tropical plantations. Keywords: Low potential geothermal resource, heat conversion, grain dryer PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

835	Material Engineering	ABS-909
COMPARISON OF CALCULATION GAS INITIAL IN PLACE USING MATERIAL BALANCE AND ARTIFICIAL INTELLIGENCE METHODS Fajar Putra Nugraha, Rini Setiati, Aqlyna Fattahanisa Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta Abstract TJS reservoir is a gas reservoir located in the area of West Java. TJS reservoir has been producing since September 1999 until now, with a total production of 37115,774 MMscf. Based on the research, the TJS reservoir is dry gas reservoir reservoir with thrust in the form of a depletion drive. The purpose of calculating and evaluating of the ga initial in place of the TJS reservoir is to see the compatibility between empirical calculations and simulator calculations. This research method uses correlation data in the form of petrophysical data, PVT data, production history data and historical data on reservoir pressure. Determination of reservoir type is based on PVT data in the field using IPM PVTP software to analyze the type of reservoir. This software requires data on composition of natural gas composition, reservoir pressure and temperature. Determination of the Gas Initial In lace (GIIP) in the TJS reservoir using the material balance method based on analysis of pressure and production data, plots between P / Z to Gp. The results of the calculation of the initial TJS reservoir gas content using the material balance method obtained the initial gas content value of 50063.59 MMscf and based on the MBAL software analysis, the initial gas content value was 50661.3 MMscf. In this study, the determination of the amount of initial gas content (GIIP) in the TJS reservoir with the material balance method and analysis of the MBAL software has obtained the appropriate results. Keywords: original gas in place, material balance, IPM MBAL, estimated ultimate recovery, remaining reserve PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

836	Material Engineering	ABS-910
APPLICATION ARTIFICIAL INTELLIGENCE TO EVALUATE GAS INITIAL IN PLACE ON RESERVOIR RGN Fajar Putra Nugraha, Rini Setiati, Aqlyna Fattahanisa Petroleum Engineering Departement, Faculty Of Earth Technology And Energy, Trisakti University, Jakarta Abstract Oil and gas industry is an industry with a high cost and high risk, artificial intelligence will help the work of humans to minimize the risk of accidents, reduce processing time and improve corporate profits. So the work becomes more efficient.The aims of the study give information that the artificial intelligence help the work to evaluate the initial gas in place on reservoir. Reservoir RGN has long produced, then it needs to be evaluated to find out how many initial gas in place is left in the reservoir. Additional research is needed to know the type of reservoir and drive mechanism.The method used is the research on reservoir RGN, the data used are based on real data in field.This research uses artificial intelligence MBAL and PVTP software, with the study of literature.Based on the research results obtained, this type of reservoir RGN is dry gas reservoir, with the drive mechanism is depletion drive. Initial gas reservoir RGN is 50,661.3 MMscf, with estimate ultimate recovery is 47,966.13 MMscf, recovery factor was 94.68% and the remaining reserve reservoir RGN in July 2018 is 10,850.386 MMscf or 10,85 Bscf.Artificial intelligence helps work, provides diverse outputs and the results obtained are more accurate and detailed Keywords: original gas in place, artificial intelligence, PVTP, MBAL PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

837	Material Engineering	ABS-913
Determination of CO2 MMP on L Reservoir by using CMG Simulation and Correlations MULIA GINTING, PURI WIJAYANTI, RALINGGA ARJUNA CINDRA Program Studi Teknik Perminyakan, FTKE, Universitas Trisakti, Jakarta Barat 11440, Indonesia Abstract In order to improve and increase oil recovery by EOR CO2 injection, CO2 MMP is an important key parameter whereas the CO2 injection must be conducted at or above MMP. The aim of this study is to determined CO2 MMP by using one-dimensional CMG simulation model and proposed the CO2MMP correlations. on L reservoir. To be able to make an accurate simulation model and to choose the best correlation , it is necessary to validation by comparing the obtained CO2 MMP with experiments in the laboratory on 8 type oil from various field. The result showed that Zhang’s correlation is the best correlation which have -6.9% average percentage of errors while using the CMG simulation model shows the average percentage errors approximately -6.5 %. Using Zhang’s correlation we calculated that CO2 MMP on L reservoir about 3388 psia and from CMG simulation we have obtained CO2 MMP equal as 3428 psia. Keywords: Correlation, Simulation, Minimum Miscible Pressure (MMP), Enhanced Oil Recovery (EOR) PermaLink | Plain Format | Corresponding Author (Puri Wijayanti)

838	Material Engineering	ABS-932
Glycemic Index on Sorghum Rice Products: “Nasi”, “Bubur”, and “Lontong” From Red Sorghum (Sorghum bicolor) and White Sorghum (KD4) Varieties Endang Noerhartati (a*), Pratika Yuhyi Hernanda(b), Mujianto (c), Dorta Simamora(b) a) Department Agroindustrial Technology- Engineering Faculty, Universitas Wijaya Kusuma Surabaya, Indonesia Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia *endang.noerhartati[at]gmail.com+endang_noer[at]uwks.ac.id a) Postgraduate Student, Department of Education Management, Universitas Negeri Surabaya, Indonesia Jl Kampus Ketintang, Surabaya, Indonesia endang.18006[at]mhs.unesa.ac.id b) Department of Medical, Medical Faculty, Universitas Wijaya Kusuma Surabaya, Indonesia Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia yuhyi_h[at]yahoo.com+dortasimamora[at]gmail.com c) Department Agroindustrial Technology-Engineering Faculty, Universitas Wijaya Kusuma Surabaya, Indonesia Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia titian354[at]gmail.com Abstract The purpose of the reseach was to analyze the activity of various glycemic indexes of sorghum rice products. The method used is experimental design, with variables of sorghum "nasi", sorghum "bubur", and sorghum "lontong" from red sorghum (Sorghum bicolor) and white sorghum (KD4) varieties. Observations included the glycemic index (GI) and glycemic load (GL), data analysis using the Anova Test followed by the 5% LSD Test. The results showed that the GI and GL significantly for all variable rice products and varieties sorghum; in the highest red sorghum is "Nasi" GI (34,37), GL (3,44); "lontong" GI (33,75), GL (3,37); and the lowest in "Bubur" GI (31,25), GL (3,12); while the highest white sorghum is "Nasi" GI (46,12), GL (4,61); "lontong" GI (35,37), GL (3,1); the lowest in "bubur" GI (23,87), GL (2,38); and the finding is show that the overall glycemic index of sorghum products is classified as low GI (GI <50), so it can be said that sorghum is a food source that can be used as an alternative healthy food. Keywords: Glycemic index; Glycemic load; Sorghum rice products; Alternative healthy food PermaLink | Plain Format | Corresponding Author (Endang Noerhartati)

839	Material Engineering	ABS-942
SAND PROBLEM PREVENTION THROUGH LABORATORY STUDIES USING MECHANICAL METHODS AND GRAVELPACK DESIGN PERFORMANCE ANALYSIS IN FIELD X Arif Yanuar Priatmoko, Sugiatmo Kasmungin, Rini Setiati Petroleum Engineering Faculty Of Earth Technology Trisakti University Abstract In this field, which has used this waterflooding technique as it goes through, there is a solid production which causes sand problems. Sand problems that occur result in increased production loss and cost lost. The purpose of this research is to find the right solution in overcoming sand problem, by studying the characteristics of the rock. Laboratory experiments were carried out using a mechanical method approach which was then used to determine the appropriate gravelpack design. The steps taken include testing the strength of the core of the three zones, The decrease of strength can conclude that the core of the three zones has begun to weaken. The results of the analysis of the grain size of the D50 then used to determine the appropriate gravelpack design in each zone. Zone A, using gravelpack 60/80, zone B using gravelpack 16/20, and zone C using gravelpack 30/50. From the gravelpack design obtained then a sand retention test is performed to determine the gravelpacks performance. With the results of the sand retention test showing good gravelpack performance for each zone, where the permeability value is good and the solid produced is not too much. Keywords: sand problem, gravelpack, sand retention test PermaLink | Plain Format | Corresponding Author (RINI SETIATI)

840	Material Engineering	ABS-706
Effects of Seeding Temperature and Growing Time on the Nanostructural Characteristics of ZnO Nanorods Thin Films prepared by Chemical Bath Deposition Gerry Resmi Liyana (a*), Akhmad Herman Yuwono (b*) a) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia *gerryliyana[at]gmail.com b) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia *ahyuwono[at]gmail.com Abstract ZnO nanostructures have been attracting much interest of researchers due to their unique properties and wide potential for various applications. In this study, the effect of seeding temperature and growing time on the characteristics of ZnO nanorods were investigated. The seed solutions were first prepared at temperature of 0, 30, and 60℃ for 1 hour using zinc nitrate tetrahydrate and hexamethylenetetramine as precursors. The ZnO seed layers were then deposited onto ITO glass substrates by spin coating technique prior to the chemical bath deposition (CBD) growth at temperature of 90℃ for different times (3, 4, and 5 hours). The synthesized ZnO nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV–Vis spectrophotometry. The results showed that with the increase in seeding temperature from 0℃ to 60℃, the crystallite size decreased from 71.32 to 38.95 nm, while the band gap energy increased from 3.27 to 3.55 eV, respectively. While with increased of growing time during CBD, the crystallite size was adversely increased from 65.37 to 88.09 nm, and consequently the band gap energy was found to decrease from 3,55 to 3,52 eV. Keywords: ZnO nanorods, ITO, chemical bath deposition, seeding temperature, growing time PermaLink | Plain Format | Corresponding Author (Gerry Resmi Liyana)

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