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181	Engineering	ABS-113
Multi-Angle Facial Recognition: Enhancing Biometric Security with a Broadly Positioned Stereo-Camera System Muhamad Amirul Haq(a*), Le Nam Quoc Huy(b), Muhammad Ridlwan(c), Ishmatun Naila(d) (a) Department of Computer Science, Faculty of Engineering, Universitas Muhammadiyah Surabaya, Surabaya, Indonesia * amirulhaq[at]ft.um-surabaya.ac.id (b) Department of Mechanical Engineering, College of Engineering, National Taiwan University of Science and Technology, Taipei City, Taiwan (c) Department of Indonesian Language and Literature, Faculty of Teacher Training and Education, Universitas Muhammadiyah Surabaya, Surabaya, Indonesia, (d) Primary School Education Program, Faculty of Teacher Training and Education, Universitas Muhammadiyah Surabaya, Surabaya, Indonesia Abstract This study addresses the vulnerabilities of traditional monocular camera-based face recognition systems, emphasizing the need for improved security and reliability in biometric authentication under varying conditions and human poses. To counteract the risk of spoofing attacks using masks or static images, we introduce a multi-angle stereo camera system. This system is strategically designed to capture facial imagery from multiple perspectives, thereby enhancing depth perception and spatial accuracy, crucial for high-security authentication. Employing a novel image processing approach, the study integrates a hybrid model of Convolutional Neural Networks and Transformers. This combination exploits CNN^s robust feature extraction capabilities with the Transformers^ generalization prowess, enabling precise detection and analysis of 3D facial landmarks. Such an approach significantly bolsters the system^s ability to differentiate between genuine faces and deceptive representations like masks or static images. Empirical results demonstrate that the stereo camera configuration substantially improves recognition accuracy, reducing both false positives and negatives, especially in controlled spoofing scenarios. The advanced 3D facial landmark detection further reinforces the system^s security. With its enhanced robustness and security, the developed system shows great potential for applications in areas requiring stringent identity verification, such as banking, public facilities, and smart home technologies. Keywords: Stereo Camera- Face Recognition- Biometric Authentication- Deep Learning- Facial Landmark. Share Link | Plain Format | Corresponding Author (Muhamad Amirul Haq)

182	Engineering	ABS-370
Setting Ozonation Parameters Using the Taguchi Method to Extend the Lifetime of Tomato Fruit (Lycopersicum Esculentum Mill) to Improve Farmer Welfare Oesman Raliby Almanan, Ahsanudin Attamimi Department of Industrial Engineering, Faculty of Engineering, Muhammadiyah University of Magelang Abstract Indonesia, an agricultural country with a diversity of agricultural products, including fruit, is attractive to the national economy. However, horticultural products are perishable, and susceptible to microbiological damage and post-harvest chemical contaminants. Ozonization of horticultural products is an innovative solution to overcome this problem. Experimental research using the Taguchi method aims to extend the lifetime of tomatoes, increase the economic value of agricultural products, and improve farmer welfare. Purpose: 1. To optimize ozonation parameters in tomatoes. 2. To evaluate the effect of ozonation parameters on tomato fruit life span Method : This research uses an experimental approach with the Taguchi method. The three main control factors identified were ozone concentration, solvent volume, and soaking duration. Each factor has several levels that will be tested systematically. Data will be collected and analyzed using statistical analysis to determine the most effective combination of parameters. Main Finding: The main findings of this research involve identifying the optimal combination of ozonation parameters to extend the lifetime of tomato fruit. Statistical analysis will highlight the factors that most influence the quality and durability of tomatoes. Implication: The results of this research have important implications Keywords: Setting Paramater, Oconation, Life Time, Tomatto Share Link | Plain Format | Corresponding Author (Oesman Raliby Almanan)

183	Engineering	ABS-116
Sustainable Lean Supply Chain to Minimize Waste in Solar Water Heater Production Emelia Sari1*, Tiena Gustina Amran1, Kinanti Mutiara Takari1, Annisa Dewi Akbari1, Tengku Nur Azila Raja Mamat2 1. Universitas Trisakti, Faculty of Industrial Technology, Department of Industrial Engineering, 11440, Kyai Tapa No 1, West Jakarta, Indonesia 2. Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Pagoh Higher Education Hub, 84600 Pagoh, Muar, Johor, Malaysia Abstract Solar water heater production is a manufacturing company dedicated to the supply of new and renewable energy. However, the company^s failure to achieve the production target is a significant challenge. The research objective is to improve the supply chain flow by implementing a sustainable lean supply chain. The research process steps: 1) identification of gaps in activities within the supply chain flow through value chain analysis, 2) determination of the types of waste, 3) construction of an Ishikawa Diagram, 4). calculation of the Sustainability Index (SI), 5) implementation of improvement. The results in process cycle efficiency increase by 10%. After the improvement, process activity mapping identified eight movements, 34 waiting, five defects, and five behavioral activities. The calculation of the SI improved from 142% to 121%. In conclusion, the research approach reduces waste and enhances production efficiency by integrating economic, social, and environmental into the improvement process and successful manufacturing practice. Keywords: sustainable lean supply chain, value stream mapping, manufacturing performance, waste Share Link | Plain Format | Corresponding Author (Emelia Sari)

184	Engineering	ABS-117
Assessment of Energy Sustainability Enhancement of a Paper Industry in Riau, Indonesia Hardi Rifki Al amin (a*), Vita Lystianingrum (b) a) System and Technology Innovation Management, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia *hardirifki.a[at]gmail.com b) Department of Electrical Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia Abstract The Paper industry is energy intensive and one of the most energy consuming industries in Indonesia. In this study, Paper Mill energy sources come from coal and renewable energy such as black liquor as a substitute for coal and on-grid 9MW PV system are reassessed by using optimization software, HOMER. This study aims to present a feasibility study of increasing the use of renewable energy sources in Paper Mill to reduce coal consumption for more sustainability. The software HOMER is used as a tool to determine the most feasible combination of component considered in the study. It is feasible to reduce 10,84% coal consumption kg per year with the optimal renewable energy mix consisting of additional 24MW rooftop PV system and 5,94kW hydrokinetic energy from Kampar River located 6 km from the plant. Renewable fraction increased to 16%. This study result is good for sustainable growth of Paper Mill business that investments in climate and nature to support the Indonesian government in achieving net zero emissions. Keywords: PV System- Hydrokinetic- Assessment of Energy- Renewable Energy- Paper Mill Share Link | Plain Format | Corresponding Author (Hardi Rifki Al amin)

185	Engineering	ABS-118
Tidal Influence Analysis Due to Development of Retaining Wall for Flood Control in Downstream Bekasi River Farianda Yubi Eka Putra 1,2 a), Faradinda Prabandini 1,3, b), Ana Nurganah Chaidar 1 1) Master of Water Resources Management Study Program, Bandung Institute of Technology 2) PT Brantas Abipraya (Corp), 3) Directorate General of Water Resources , Ministry of Public Works and Housing Abstract The downstream area of Bekasi River lies within a mainly flat terrain, with over 80% of the downstream slope inclination measuring less than 8%. This studied here, extends downstream from the Bekasi dam and terminates at the junction where it meets the CBL River. Understanding the causes of this flooding requires analyzing tidal fluctuations since Downstream Bekasi River directly interfaces with the CBL River, which flows directly into the sea 10 km downstream. The principal aim of this study is to evaluate the impact of tides on Bekasi River. The methodology involved gathering primary and secondary data, which served as inputs for modeling tidal influences using the HEC-RAS application. Utilizing the L-Square method, tidal data analysis revealed the HWL at 2.05 meters, MSL at 1.35 meters, and LWL at 0.65 meters. Following this, hydrological analysis utilizing rainfall and discharge data resulted in a planned discharge of Q10 at 322.14 m3/s. Modeling was conducted under two scenarios: Q10 discharge during flooding and Q10 discharge during normal conditions. The modeling results indicated an absence of tidal influence during the Q10 flood discharge of 322.14 m3/s. However, under normal Q10 discharge, tidal effects extend up to 2.6 km along Bekasi River. Keywords: Tydal, HEC-RAS modelling, L-Square, Downstream Bekasi River, Flood Discharge Share Link | Plain Format | Corresponding Author (Farianda Yubi Eka Putra)

186	Engineering	ABS-374
UI/UX Design of UMKM Entrepreneurship E-Catalog Website In Karangrejo Tourism Village Using The Design Thinking Method Berno Falalanggi (a*), Agus Setiawan, M.Eng.(b) , Pristi Sukmasetya, S.Komp., M.Kom(b) Muhammadiyah University Of Magelang Abstract Entrepreneurship is things related to entrepreneurship. Meanwhile, wira means courage and business means commercial or non-commercial business activities. Currently, Magelang district has many tourist villages that have various types of entrepreneurship produced. In other words, the tourist village has succeeded in building MSMEs to advance the personal economy and advance the village. Karangrejo village is one of the villages in Borobudur sub-district, Magelang regency. This village has a lot of MSME work produced and is also a suitable tourist destination for tourists. However, Karangrejo village really needs a website-based catalog to introduce their products to tourists who visit the village. The process of creating a website requires a user interface design that is attractive to users and also a user experience that provides comfort to users when accessing the website. The design process requires a method to help the process of completing the design. Design Thinking is one of the methods that will be used in this research. This research was carried out using the Design Thinking stages, namely empathize, define, ideate, prototype, and testing. The research results of the UI/UX design of the Karangrejo Village MSME Entrepreneurship E-Catalog website show a good level of usability and meet user needs. This Design Thinking method is able to improve the quality of user experience in designing this website. It is hoped that this design will become the basis for development by the Karangrejo Village government to advance MSMEs in their village Keywords: Entrepreneurship- Karangrejo Village- UMKM- User Interface- User Experience- Design Thinking Share Link | Plain Format | Corresponding Author (Berno Falalanggi)

187	Engineering	ABS-120
Flood Risk Assessment in Pangalengan District (Study Case Pangalengan and Margamukti Village) Assyifa Rosani (a), M. Syahril Badri Kusuma (b), Mohammad Farid (b), Bagus Handyastono (a), Regina Dio Oriandra (a*) (a) Master Student of Water Resources Management, Faculty of Civil and Environmental Engineering Bandung Institute of Technology, Jl. Ganesha No.10 Bandung 40132, Indonesia (b) Water Resources Development Center Bandung Institute of Technology, Jl. Ganesha No.10 Bandung 40132, Indonesia Abstract Pangalengan District is part of the upstream area of the Cisangkuy River, which is a tributary of the Citarum River. Several floods occur every year that inundate up to 2 (two) villages. It is suspected that flooding occurs due to changes in land cover from forests to plantation areas, where rainwater that falls will not be intercepted and immediately run over into settlements. This research analyzes the risk of flooding in the two affected villages. Flood analysis was conducted using modeling method using HEC-RAS software and FABDEM as the topography data. The parameters used for the vulnerability aspect are social and for the capacity aspect refer to those set by BNPB. The results of the model are then calibrated with flood events at the study site, then flood risk analysis is carried out to obtain a risk map that can be used as a condiseration for the flood management in Pangalengan. Keywords: Pangalengan, Flood, Risk Analysis, FABDEM, HEC-RAS Share Link | Plain Format | Corresponding Author (Regina Dio Oriandra)

188	Engineering	ABS-376
Evaluation of Urban Public Transportation Routes in Bekasi District Indonesia Sri Nuryati, Abdul Azis Husaini, Elma Yulius, Anita Setyowati Srie Gunarti (*), Fajar Prihesnanto, Eko darma Faculty of Engineering, Universitas Islam 45 Jalan Cut Meutia No. 83, Bekasi, Indonesia *anita_ft[at]unismabekasi.ac.id Abstract One of the factors to support and increase economic productivity in Bekasi district is transportation, so public transportation services are needed as the main support for community activities. The public transportation service in Bekasi district is urban transportation, which is less popular because people have switched to public transportation modes since the existence of ojol (online motorcycle taxis) which are more practical and flexible. Apart from that, in terms of urban transportation services in Bekasi district, it is still considered less satisfying for customers so there are few people interested. The aim of the research is to determine the performance, services, and maps of old and new city transport routes in Bekasi district on routes K33. The methods used in this research are the Slovin method for sampling respondents, a Likert scale to determine the score of question criteria, and the IPA method. to find out priorities for improving services in city transportation in Bekasi district. Assistance software used to analyze data using SPPS, Ms Excel, and route network maps using ArcGIS. The research results show that the smallest load factor performance value is 13%, headway is 112.42 minutes, frequency is 1 vehicle/hour, vehicle speed is 14.43 km/hour, longest travel time is 74 minutes, longest waiting time is 77.66 minutes, circulation time the longest was 163.05 minutes. City transportation services based on the results of the Cartesian diagram are a priority for increasing the waiting time criteria in transportation. Mapping the route network to move the K33 route from the Cikarang - Lemahabang - Serang terminal to Lemahabang - Lippo Cikarang Mall. Keywords: city transportation- transportation performance- route network map Share Link | Plain Format | Corresponding Author (Anita Setyowati Srie Gunarti)

189	Engineering	ABS-378
Development of Ceramic Decorative Rotary Tool Technology Based on the Internet of Things as a Learning Media to Support Creative Industries Rahmat Hidayat (a*), Andi Adriansyah (b), Febi Kurniawan (c) a) Faculty of Engineering, Singaperbangsa University of Karawang Jalan H.S. Ronggowaluyo Telukjambe, Karawang 41316, Indonesia *rahmat.hidayat[at]staff.unsika.ac.id b) Faculty of Engineering, Universitas Mercu Buana Jalan Raya Meruya Selatan Kembangan West Jakarta 11610, Indonesia c) Faculty of Teacher Training and Education, Singaperbangsa University of Karawang Jalan H.S. Ronggowaluyo Telukjambe, Karawang 41316, Indonesia Abstract Abstract Indonesia is a rich and diverse country for crafts and creative industries. In supporting the creative industry, it is necessary to have skills through learning creative crafts in the community of Rangdumulya Village, Pedes District, Karawang. The problem that occurs is that currently the younger generation is less interested in creative crafts such as pottery, ceramics, and batik. In making pottery and ceramics, turntable equipment is needed to make pottery products that can be formed into jugs, teapots, glasses, and jars. The lack of digital turntable tools is helping the work of pottery craftsmen in the process of making and forming pottery, which can be used to accelerate the production process. The purpose of this research is to create, design, and implement in order to have a positive impact on the emergence of new technological products and the creation of pottery technology, which is considered very necessary to help the learning process of creative crafts in the village in order to become an independent village. And the focus of this research is the development of internet-of-things-based ceramic decorative rotary tool technology as a learning medium to support creative industries. The result of this research is that Internet-of-Things-Based Ceramic Decorative Rotary Tool Technology can work, have a positive impact on pottery craftsmen, and increase the productivity of youth skills in the field of creative crafts, especially in making pottery or ceramics. Keywords: Keywords: technology- tools- village- creative industries. Share Link | Plain Format | Corresponding Author (Rahmat Hidayat)

190	Engineering	ABS-123
Utilization of Machine Learning to Predict the Correlation between Color of River Water and Other Water Quality Characters Ikhwanussafa Sadidan, Gina Lova Sari, Edmund Ucok Armin, Fakhri Ikhwanul Alifin, Amalia Rizka Sugiarto Environmental Engineering Study Program, Engineering Faculty, Universitas Singaperbangsa Karawang, West Java, Indonesia Abstract This study using Artificial Intelligence investigates the intricate relationship between water color and key water quality parameters, such as DO, BOD, COD, TSS, and Fe concentrations. The primary objective is to establish a predictive model employing SVR analysis and DTR to discern the correlation patterns among these parameters. The purpose of this study is to predict and analyze the the correlation between key water quality parameters with the water color. These models are constructed by scrutinizing the intricate associations between water color and the aforementioned water quality parameters using machine learning. Total Dissolved Solid and pH are two parameters that show a very high correlation with water color. Both show figures of 0.95 and 0.93. The results of this study can be implemented by various institutions such as educational institutions, environmental services, or consultants who want to make predictions and modeling of water quality, especially on color parameters. Keywords: Machine Learning, Water Quality, Regression, Water Color Share Link | Plain Format | Corresponding Author (Ikhwanussafa Sadidan)

191	Engineering	ABS-379
DIGITAL MEDIA IN TEYL: A REVIEW Agrissto Bintang Aji Pradana (1)*, Putri Meinita Triana (2), Tri Pujiani (3), Aprilia Erin (4) Universitas Muhammadiyah Magelang (1) (2) (4) Universitas Harapan Bangsa (3) Abstract Technology has become an integral aspect of learning in recent years. It may be introduced into different phases of language acquisition. It may be utilized not just to help pupils comprehend, but also in examinations. Especially digital media, it might enhance students^ enthusiasm to learn. This study seeks to provide an overview of language learning digital media utilized for classroom activities in the previous five years. It only focuses on Teaching English for young Learners. The articles presented are focused on learning English in primary school. The PRISMA framework is used to filter the articles in ERIC, which is utilized as a database. 301 articles were collected in the initial phase that were relevant to the keywords specified. However, only 32 papers were considered most relevant to the topic and study aims in the final phase. The articles are from seven different nations and use 14 digital media, eight card-based activities, five bard games, and the remainder do not specify any specific digital media. The influence of this media ranges from raising motivation to comprehension, language abilities, linguistic correctness, vocabulary, and grammar. However, there are barriers to its deployment, such as insufficient facilities and instructor expertise in adopting digital media. There are also guidelines for English instructors to prepare themselves and their facilities to increase the quality of learning using digital media. Actually, there is one area that has not been well explored, such as correlation between method and differentiated learning, particularly in the current curriculum. Keywords: digital, English, media Share Link | Plain Format | Corresponding Author (Agrissto Bintang Aji Pradana)

192	Engineering	ABS-125
Analysis Exhaust Emissions (CO, CO2 and HC) on FI Motorcycle with Variations in Ignition Timing, Injector Timing and Fuel Variations Wawan Purwanto (a), M. Sadly Firmansyah (a), Hasan Maksum (a), Ahmad Arif (a), M. Yasep Setiawan (a) a) Department of Automotive Engineering, Universitas Negeri Padang Jl. Prof. Dr. Hamka, Air Tawar Bar., Kec. Padang Utara, Kota Padang, Sumatera Barat 25171 *wawan5527[at]ft.unp.ac.id Abstract This study discusses changes in the value of CO,CO2 and HC levels of exhaust emission on FI Motorcycle with the use ECU Programmable 4 variation of ignition timing and injector timing with use 3 variations fuel in every treatment. The purpose of this study was to determine how much influence the use ECU Programmable and variation of fuel on exhaust emissions produced by the research object. This type of research is experimental research. The object of this research is the FI Motorcycle. The lowest CO and HC level produced by FI Motorcycle with the use of a Programmable ECU is obtained in the treatment at ignition timing of 7 degrees BTDC and injector timing 350 degrees ATDC using Gasohol E30 fuel, while the lowest CO2 level is obtained at the ignition timing treatment of 3 degrees BTDC and when injector timing 350 degrees ATDC using Pertamax Turbo fuel, where the results obtained show significant changes after going through a comparative test using the T test with a significant level of 5%. Keywords: Exhaust Emissions- FI Motorcycle- ECU Programmable- Ignition Timing- Injector Timing- Fuel Share Link | Plain Format | Corresponding Author (M. Sadly Firmansyah)

193	Engineering	ABS-126
Design and Development of Fuel Consumption Meter on Motorcycle Based on Injector Pulsewidth using Arduino Uno Microcontroller Toto Sugiarto (a), Dwi Sudarno Putra (a*), Agus Baharudin (b), Firoj Mulani(c), Hoai-Hung Khong(d), Joel O. Abratiguin(e) a) Universitas Negeri Padang, Padang, Sumatera Barat, Indonesia * dwisudarnoputra[at]ft.unp.ac.id b) National Tsing Hua University Hsinchu City, Taiwan 300 c) Dattakala College of Engineering, Swami-Chincholi,Pune, Maharashtra,India d) Institute of Mechanical Engineering, Ho Chi Minh City University of Transport, Ho Chi Minh City 70000, Vietnam e) Automotive Technology, Technology Management, University of Science and Technology of Southern Philippines Claro M. Recto Avenue, Lapasan, Cagayan de Oro City 9000 Abstract Motorcycles equipped with fuel injection systems commonly utilize dashboard indicators to ascertain the amount of fuel remaining, resulting in riders having an imprecise understanding of fuel consumption. As a result, motorcyclists may find it difficult to evaluate fuel use during specific time periods. In order to tackle this issue, the researcher develops a digital gadget that employs a microcontroller to regulate performance. The device exhibits fuel usage data in relation to injector pulsewidth. Moreover, the device can also function as an educational tool for vocational high school students to acquire knowledge about the operation of EFI motorcycle fuel systems. This study employs a research and development methodology, with a specific focus on a 2021 Honda Beat FI motorbike that was tested in the Automotive Engineering Vehicle Testing Workshop at Universitas Negeri Padang. The analysis of experimental data during idle rotations at 20, 40, and 60 seconds reveals average percentage errors of 2%, 1.73%, and 11.76% correspondingly. This leads to an overall device error rate of 4.74% throughout all test situations. The data was obtained through a comparison between the measurement data from the device and the actual measurement data. The error rate signifies the device^s precise measurement of fuel usage in real-world situations. Keywords: Fuel Consumption- Microcontroller- Arduino Uno- Injector Pulse-width Share Link | Plain Format | Corresponding Author (Dwi Sudarno Putra Putra)

194	Engineering	ABS-382
Patient Infusion Bottle Monitoring System Based on IoT Seta Samsiana, Setyo Supratno, Firman Choiri Okta, Sugeng, Muhammad Ilyas Sikki, Andi Hasad, Abdul Hafid Paronda Universitas Islam 45 Bekasi Abstract In the healthcare field, the process of intravenous fluid infusion has become a crucial method in patient recovery. However, monitoring and replacing infusion bottles pose challenges for hospitals due to limited medical staff and time constraints. Currently, infusion bottle control is still done manually, which can lead to risks such as delayed handling when the infusion bottle is empty and the risk of blood clot formation. Therefore, the use of technology is needed to address these issues. This research aims to design and create a real-time Internet of Things (IoT)-based monitoring and alert system for patient infusion bottle conditions related to volume using a website. The research uses data collection methods such as literature studies, system design, device assembly, and system testing. The results obtained in this study include an infusion pole equipped with Load cell sensors and a website application that can monitor patient infusion bottles through the nurse^s room. The conclusion is that the comparison results between the sensor and the digital scale show a percentage error of 0.11% on Load cell A and 0.14% on Load cell B. Then the average measurement tolerance at different infusion flow rates shows variation. At slow infusion flow rates, the average tolerance on infusion A is -0.04%, while on infusion B is -0.06%. At moderate infusion flow rates, the average tolerance on infusion A is -0.12%, and on infusion B is -0.07%. At fast infusion flow rates, the average tolerance on infusion A is -0.19%, and on infusion B is -0.04%. Keywords: Monitoring, Infusion, Load Cell, IoT Share Link | Plain Format | Corresponding Author (Seta Samsiana)

195	Engineering	ABS-127
Prediction of Bottomhole Pressure of Geothermal Wells Using Artificial Neural Network Model Muhammad Taufiq Fathaddin (a*), Rini Setiati (a), Muhammad Burhannudinnur (a), Havidh Pramadika (a), Agus Guntoro (a), Fajar Hendrasto (a), Alvita Kumala Sari (b) a) Universitas Trisakti, Jakarta 11440, Indonesia *muh.taufiq[at]trisakti.ac.id b) PT. Pertamina EP Cepu, Cepu 50275, Indonesia Abstract Many geothermal wells produce a two-phase flow of water and steam. These geothermal fluids experience a loss of pressure and temperature as they move from the bottom of the hole to the well head. Loss of fluid pressure is caused by friction with the well wall, acceleration and elevation of the flow. The loss of fluid temperature is caused by changes in geothermal temperature along the well which is a function of depth. In this study, an artificial neural network model is applied to determine well bottom flow pressure. The parameters of well head pressure, well diameter, well length, mass flow rate, enthalpy, heat transfer, well head and well bottom temperature are used as input. Prediction of well bottom flow pressure using this proposed method provides predictions with an average error of 3.28%. Additionally, this method provides more accurate results than the previous method which gave an average error of 6.29%. Keywords: Artificial Neural Network, Bottomhole Pressure, Vertical Well. Share Link | Plain Format | Corresponding Author (Muhammad Taufiq Fathaddin)

196	Engineering	ABS-128
Implementation of a Knowledge Management System Using Semantic Networks for Academic Information Systems in Higher Education Intan Purnamasari, Siska, Nur Arifin Fakultas Ilmu Komputer, Universitas Singaperbangsa Karawang Abstract A knowledge base is a component that is really needed in any field and agency. As is known, especially in the education sector, several educational institutions, both private and public, have different academic rules and systems. Likewise in universities, the academic system implemented has diversity which is usually influenced by the characteristics of the university itself as well as the curriculum applied. This research aims to create a knowledge management system that focuses on the knowledge base - knowledge that can be analyzed from the higher education academic system. The research method that will be used uses the Knowledge Management System Life Cycle (KMSLC) approach, also called the Knowledge Management System Life Cycle. The research stages that will be carried out include: Analysis and Planning, Resource Identification, Knowledge Identification (where the sequence of stages is: Knowledge Creation, Knowledge Storage, Knowledge Sharing, Knowledge Utilization), then KMS Design using a semantic network, Verification and Validation KMS, KMS implementation, after that the test and evaluation stage. The output of the research is a system model that can be developed into an information system in the form of a web-based application with the theme Knowledge Management System for academic systems in higher education. Keywords: knowledge management system- KMSLC- semantic networks- academic system- College Share Link | Plain Format | Corresponding Author (Intan Purnamasari)

197	Engineering	ABS-386
EXPERIMENTAL STUDY OF VARIATIONS IN FIBER TYPES AND VOLUME FRACTIONS OF UNSATURATED POLYMER RESIN (UPR) COMPOSITES ON THE MECHANICAL AND PHYSICAL PROPERTIES OF THE MATERIAL Novi Laura Indrayani, Riri Sadiana, Fatimah Dian Ekawati, Yopi Handoyo Universitas Islam 45 Abstract Biocomposites are a type of material that comes from organic base materials and will decompose more easily when they become waste. Many products currently come from composites, the existence of biocomposites will of course reduce the amount of waste. In this research, biocomposite materials will be made with 2 variations of fiber types with an Unsaturated Polymer Resin (UPR) matrix and volume fraction. The fibers used include palm tree fiber and sea pandan fiber. Biocomposites are made into four types of specimens with different volume fractions, namely 5% fiber with 95% matrix- 10% fiber with 90% matrix- 15%fiber with 85%matrix- and 20% fiber with 80% matrix using the hand lay-up method. The results of making biocomposites were tested for physical properties in the form of density, water absorption and swelling tests and mechanical tests with tensile tests and impact tests. The physical property values &#8203-&#8203-appear to be almost the same for each fiber. Meanwhile, the mechanical properties of palm fiber biocomposites show the highest impact strength compared to other fibers, obtained at the KSI3 fiber volume fraction of 30,860 kJ/m2. The tensile strength value of the palm fiber biocomposite can also accept stress to produce a deformation value of 25.73 MPa. Keywords: Fiber biocomposites, volume fraction, hand lay-up method, unsaturated polyester resin, mechanical properties test, physical properties test. Share Link | Plain Format | Corresponding Author (Novi Laura Indrayani)

198	Engineering	ABS-131
Swirl Type Microbubble Generator Application in Artificial Wastewater Treatment Drajat Indah Mawarni, Hartono Guntur Ristiyanto Sekolah Tinggi Teknologi Ronggolawe Abstract Microbubble generator (MBG) is a tool that can produce micro-sized air bubbles. One of the unique properties of this microbubble is that it can remain in water for quite a long time because its buoyancy force is small, so it can increase dissolved oxygen in the water. This study will discuss the application of MBG in synthetic wastewater treatment. One indicator of the success of wastewater treatment is reducing COD (chemical oxygen demand) in wastewater. This experiment is carried out by varying the water discharge (QL) from 25 to 80 Lpm. Meanwhile, the air discharge (Qg) is from 0.1 to 0.6 Lpm. To see the size and distribution of microbubbles, this is done using a high speed video camera. Whereas, the measurement of COD for synthetic wastewater samples is carried out using the colorimetric closed reflux method. The result of the study shows that the increasing of QL at constant Qg will increase the rate of mass transfer of air to water, thereby it increases the rate of COD reduction. Meanwhile, the increasing of Qg at constant QL will increase the bubble diameter, but on the other hand the number of bubbles also increases. However, the increasing of dissolved oxygen is not more significant than the increasing of water discharge. Keywords: microbubble generator, buoyancy force, aerasi, chemical oxygen demand, high speed video camera, refluks method. Share Link | Plain Format | Corresponding Author (Drajat Indah Mawarni)

199	Engineering	ABS-135
Reliability of Fiber Optic Sensor for Weight Measurement System Fatimah Nur Hidayah1, a), Roedy Kristiyono2, b), Zuhdi Ismail3, c), Norhidayah Che Ani4, d) 1Mechanical Engineering, Sekolah Tinggi Teknologi Warga Surakarta, Jalan Baki - Solo Km. 2 Grogol, Sukoharjo, Jawa Tengah 57522, Indonesia 2Electrical Engineering, Sekolah Tinggi Teknologi Warga Surakarta, Jalan Baki - Solo Km. 2 Grogol, Sukoharjo, Jawa Tengah 57522, Indonesia 3Research Center for Accelerator Technology, National Research and Innovation Agency, Babarsari, Tambak Bayan, Caturtunggal, Depok, Sleman, Daerah Istimewa Yogyakarta 55281, Indonesia 4Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), 86400 Parit Raja, Batu Pahat, Johor, Malaysia Abstract Weight data monitoring is needed on transportation for assessment conditions. This study thoroughly investigates the reliability of fiber optic sensor in weight measurement system, specifically focusing on hysteresis, repeatability, and eccentricity. By providing practical experimental observations, this research aims to find out the reliability characteristic of fiber optic sensor. It enhances the understanding of the capabilities and limitations of fiber optic sensor. The impact of hysteresis on sensor performance in dynamic loading and unloading scenarios. Repeatability tests have been done by conducting careful backtesting with 7 kg and 10 kg, each involving 10 repeated data. Then, eccentricity is applied to loading at five points. They are the center, front, left side, back, and, right side. The research results show that linear data is suitable for use in fiber optic sensor. It^s each value of ascending data and descending data are 0.9906 and 0.989. The values of repeatability are 0.007 and 0.03. It shows that the resulting data is trustworthy and reliable. The eccentricity test shows that the maximum value is 0.25. It is crucial to consider for future measurement uncertainty calculations. From the research data, it can be said that the fiber optic sensor can be implemented for weight measurement. Keywords: weight, measurement, fiber optic sensor, reliability Share Link | Plain Format | Corresponding Author (Fatimah Nur Hidayah)

200	Engineering	ABS-393
Cattle Transport Drivers Clustering using PCA and K-Means Algorithm Jajam Haerul Jaman, Agus Buono, Dewi Apri Astuti, Sony Hartono Wijaya, Burhanuddin Fakultas Ilmu Komputer, Universitas Singaperbangsa Karawang, Karawang. Departemen Ilmu Komputer, IPB University. Bogor Departemen Ilmu Nutrisi dan Teknologi Pakan, IPB University. Bogor Departemen Ilmu Komputer, IPB University. Bogor Departemen Agribisnis, IPB University, Bogor Abstract This research explores the logistics of cattle transportation in Indonesia, specifically focusing on its impact on cattle welfare during travel. Through interviews and observations involving 73 cattle transporters and ranchers, the study investigated critical factors such as physiological, thermal, and overall condition stress of cattle. With a methodological approach that includes fact-finding and data understanding, preprocessing, data transformation with PCA, and K-Means clustering, this analysis reveals that two main components can account for about 44.71% of the total data variation. 27 of the 72 rows of data fit into cluster 0, 22 rows of data went into cluster 1, and 24 rows of data went into group 2. The findings have implications for designing more humane and efficient transport strategies, potentially reducing stress-induced weight loss in cows. In addition, the results of the study provide insights for practitioners and stakeholders in optimizing route planning, driver selection, and overall logistics management. Research findings can provide input for improved regulation in the cattle sector, encouraging responsible and ethical practices. In addition, the study suggests the potential for developing guidelines or training programs for cattle transporters, improving their skills and awareness regarding good animal treatment during travel. Overall, this research opens up opportunities to improve practices and policies in the cattle farming industry in Indonesia, with a positive impact on animal welfare and the sustainability of the cattle supply chain as a whole. Keywords: driver, cattle transportation, pca, k-mean, clustering Share Link | Plain Format | Corresponding Author (jajam haerul jaman)

201	Engineering	ABS-138
Paleogene Calcareous Nannofossil Chronostratigraphy At CB Well, South Makassar Basin Cut Balqis Riva Alya, Rendy, Dewi Syavitri, Yarra Sutadiwiria, Andy Livsey*, Salsabila Reno Study Program of Geological Engineering, Faculty of Earth Technology and Energy, Universitas Trisakti, Jakarta, Indonesia. *PT. Horizon Consulting Abstract Well ^CB^ is located in the South Makassar Basin, where the lithological unit comprises of the Balangbaru and the Toraja Formation. The Paleogene calcareous nannofossils biostratigraphy of this area has not been studied yet and the chronostratigraphic framework is still arguable, So in this study, we discuss the detailed bio-chronostratigraphy of the South Makassar Basin, using calcareous nannofossil biostratigraphy. This study aims to identify the calcareous nannofossils assemblages, determine the age, calculate the sedimentation rate, and reconstruct Paleogene chronostratigraphy in the ^CB^ well in The South Makassar basin. This study analyzed high-resolution calcareous nannofossils of the well ^CB^ from a depth of 9 to 2288 m. The cutting samples and a few core samples were used for the biostratigraphic analysis and were processed using the smear slide method. There are 53 species of calcareous nannofossils belonging to 21 genera identified in the well ^CB^. Three calcareous nannofossils genera which dominate the assemblages are Cyclicargolithus, Reticulofenestra, and Sphenolithus. The age of the lithological unit is assigned to Maastrichtian Stage of Cretaceous to NP16-NP23 of middle Eocene to middle Oligocene. Unconformities detected in two horizons are correlated to the timing of well-known global climatic events such as ^K/Pg Meteor impact^, ^the Late Paleocene Thermal Maximum^ (66 to 55Ma) and ^Oi-1 glaciation^ (34 to 32Ma). This result reveals that the occurrence of unconformities of ^CB^ well in the South Makassar Basin is significantly related to eustatic changes caused by global climatic events. The implications of this study include that it could be a novel contribution to hydrocarbon exploration in Indonesia, as well as an important reference for further biostratigraphic studies in the South Makassar Basin. Keywords: Biostratigraphy- Calcareous nannofossils- Chronostratigraphy- Paleogene- South Makassar Basin Share Link | Plain Format | Corresponding Author (Cut Balqis Riva Alya)

202	Engineering	ABS-394
PERFORMANCE OPTIMIZATION OF PERTALITE FUEL GASOLINE ENGINE WITH THE ADDITION OF TERPENTINE AND ETHANOL OIL Taufiqur Rokhman, Paridawati, R. Hengki Rahmanto, Aep Surahto, Dimas Aji Prasetyo Universitas Islam 45 Bekasi Abstract Motorized vehicles are the most frequently used mode of transportation in everyday life. Of the many types of vehicles, motorbikes are one of the most popular vehicles among the middle and lower middle class because of their minimalist design, fairly affordable prices and efficiency. With the increasing number of consumers using motorized vehicles, the need for fuel is becoming increasingly high, where there is a phenomenon of wasting energy, especially fuel oil (BBM). Realizing this, a lot of research and development has been carried out to streamline the energy used in motor gasoline, one of which is by adding bio-additives turpentine oil and ethanol to pertalite fuel. This research was carried out by testing on a dynamometer engine which was then collected in the form of recorded data to determine the composition of turpentine oil and/or ethanol in the pertalite mixture which produces optimal engine performance. From testing and data analysis, it was concluded that the addition of turpentine oil and ethanol could produce the most optimal torque of 10.97 N.m and power of 9.81 hp, higher than without any mixture or 100% pure pertalite. Likewise, the addition of this composition reduces engine fuel use because the highest savings occur in the mixture composition P: 70%, T: 10%, and E: 20% at 5500, 6000, 6500, 7000, and 7500 RPM with average consumption. amounting to 0.3774 L/h compared to without any mixture or 100% pure pertalite which has a higher average consumption of 0.5836 L/h. Keywords: Motorcycle, Turpentine Oil, Ethanol, dynamometer Share Link | Plain Format | Corresponding Author (Taufiqur Rokhman)

203	Engineering	ABS-139
The Prediction Of Debris Flow Based On Eruption and Rainfall Event For River Infrastructure Mitigation: Study Case Opak River, Sleman Regency Hadiranti, Priyo Sembodo, Agung Wiyono Hadi Soeharno, Adi Prasetyo, Eka Oktariyanto Nugroho, & Angga Eko Putranto Ministry of Public Works and Housing, Jalan Pattimura 20, Jakarta, Indonesia Graduate School of Water Resources Management, Faculty of Civil and Environmental Engineering, ITB, Jalan Ganesha 10, Bandung, Indonesia Master Program in Water Resources Management, Faculty of Civil and Environmental Engineering, ITB, Jalan Ganesha 10, Bandung, Indonesia Email: dirahadiranti[at]gmail.com, juanbintang[at]gmail.com, agwakademik[at]gmail.com, adi.prasetyo[at]pu.go.id, nugrohoeka[at]ftsl.itb.ac.id, angga.putranto[at]pu.go.id. Abstract Mount Merapi is a volcano active in Indonesia. The eruption that occurred in 2010 was a major eruption with a return period of 100 years. Dominant debris to the Opak - Gendol Watershed- the biggest debris flood occurred in 2010 - 2011. One of the disaster mitigation on the Opak River is the Sabo Dam infrastructure. Currently, in the upper reaches of the Opak River, there are 5 Sabo Dams. In 2022, 2 additional Sabo Dams were built, namely OP RRC4 and OP RRC3a. This study will be used modelling 2D HEC-RAS Non-Newtonian before the construction of 2 Sabo Dams and after the construction of 2 Sabo Dams with river geometry measured in 2020 and flood discharge as measured from rainfall triggering debris flow on 03 January 2011, from this rainfall a 6-hour rain distribution was carried out using the PSA coefficient to be input in the HEC-HMS, the hydrological parameters used on 03 January 2011, were used to calculate the Q100 flood discharge. The results of modelling at the observation point using the Q100 showed that the elevation of the debris flow after the presence of the new Sabo Dam series could be reduced by up to 47.21 %, Sabo Dam effectively reduces the rate of debris flow to reduce the potential debris flood. Keywords: Debris Flow, Flood, Sabo Dam, HEC-RAS Non-Newtonian, HEC-HMS, Opak River. Share Link | Plain Format | Corresponding Author (Hadiranti Hadiranti)

204	Engineering	ABS-140
Evaluation of Geomorphology and Geological Structure on Laterization Process of Ophiolite Complex in Field X, Southeast Sulawesi Debby Sintia Dewi (a), Novi Triany (a*), Mira Meirawaty (a), Budi Wijaya (a), Ramadhan Adhitama (a), Afiat Anugrahadi (a), Agus Guntoro (a) (a) Geological Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti Jl. Kyai Tapa No.1, Grogol, Jakarta Barat, Jakarta, 11440, Indonesia. *novi.triany[at]trisakti.ac.id Abstract The study area is a nickel IUP located in Kolaka Regency, Southeast Sulawesi Province. The study area is part of the ophiolite complex with complex morphological conditions and geological structures. The laterization process in the study area has resulted in a varied distribution of nickel deposits. This study uses layer thickness and Ni content to compare the relationship between geomorphological conditions and geological structures to the laterization process. The research methods used include geomorphological analysis, field observations, and thickness and Ni content distribution analysis based on validated drill data. The results showed that generally, nickel laterite deposits thicken and increase in grade in the undulating hills geomorphological unit with a gentle slope of 4&#8304- - 8&#8304- and partly in the undulating hills unit with a slope of 16&#8304- - 26&#8304-. The morphological factor of slope is the main factor in the laterization and enrichment of Ni content. However, in some hilly areas with steep slopes, the laterization process is strongly influenced by fractures and rising faults in the study area. The presence of ascending faults and intense fractures in the area acts as secondary porosity as a pathway for fluid / meteoric water that will weather the bedrock so that the laterization process can occur properly. Keywords: Laterization, ophiolite complex, geomorphology, geological structure, Southeast Sulawesi Share Link | Plain Format | Corresponding Author (Novi Triany)

205	Engineering	ABS-144
Utilization Of Anthropometric Data In The Development Of Rattan Shoulder Bag Strap Products In Indonesia Dwi Cahyadi 1,2- Siti Haida Ismail 2- Mohd Yusof MD Daud 2- Roslina Mohammad 2- Muh Irwan 3- Ratna Wulaningrum 4. 1 Razak Faculty of Technology and Informatics, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia 2 Department of Design, Politeknik Negeri Samarinda, Samarinda, Indonesia 3 Department of Chemical Engineering, Politeknik Negeri Samarinda, Samarinda, Indonesia 4. Department of Accounting, Politeknik Negeri Samarinda, Samarinda, Indonesia Abstract Rattan bag handicraft products in Indonesia have various shapes and sizes of bag straps. One type of bag strap is a shoulder bag strap made from rattan. Rattan bag straps are permanent in size on the bag product. This causes the rattan shoulder bag strap to be inflexible enough to be lengthened or shortened according to the user^s height. The aim of this research is to design a standard size for ergonomic rattan shoulder bag straps for strap length for small, medium and large users in Indonesia. The method in this research uses calculations from the use of Indonesian anthropometric data, gender of women aged 17-45 years. The contribution of this research to the rattan handicraft industry in Indonesia is to provide a standard recommendation for the length of rattan shoulder bag straps for users in Indonesia. The results of this research show that the length of a rattan shoulder bag strap for small users is 60 cm, for medium size 85 cm and for large size 100 cm. Keywords: Anthropometry, handicrafts, bags, rattan Share Link | Plain Format | Corresponding Author (Dwi Cahyadi)

206	Engineering	ABS-147
Technology & Economic Perspective of Hydrogen as A Green Fuel On Ship Betty Ariani1)*, Frengki M Felayati 2), M.Arif Batutah3), Marwan Rosyadi4) 1 Department of Naval Architecture, Universitas Muhammadiyah Surabaya 2 Department of Marine Engineering, Universitas Hang Tuah Surabaya 3 Department of Mechanical Engineering, Universitas Muhammadiyah Surabaya 4 Department of Electronical Engineering, Universitas Muhammadiyah Surabaya Abstract De-carbonization and zero carbon are currently the main targets for the shipping sector as environmental regulations become increasingly stringent. The increasing depletion of fossil fuels is also a strong reason for the shipping world to look for alternative energy. Green hydrogen is expected to play well in the maritime industry^s journey towards de-carbonization. Produced via electrolysis, H2 free of carbon emissions, could be widely available throughout the world in the future. Currently, the development of hydrogen is still experiencing many challenges and obstacles. In this article, a technical and economic perspective regarding the development of hydrogen, can be used in evaluations, solutions, and new research developments to perfect hydrogen technology as fuel on ships. Keywords: Alternative Fuel, De-carbonization, Hydrogen, Maritime, Zero Carbon Share Link | Plain Format | Corresponding Author (betty ariani)

207	Engineering	ABS-403
Implementation of business process re-engineering in improving local government performance: A Literature Review Using Bibliometric Analysis Muhamad Sayuti1,2, Bambang Syairudin1, I ketut Gunarta1 Sepuluh Nopember Institute of Technology (ITS)1, Universitas Buana Perjuangan Karawang2 Abstract Process management is a science that is often used by companies to improve process stages so that company goals and targets are achieved. A well-known process management technique to improve the process is business process re-engineering, or BPR. Although it has a high risk, BPR is often used by companies to make process improvements so that the goals and objectives targeted by the company are achieved in accordance with a predetermined timeframe. This study aims to look at business process re-engineering to improve local government performance. The method implemented to complete this research is a literature review using bibliometric analysis from Scopus and using the R Studio Program. The results of this study under business process re-engineering are proven to improve local government performance and are expected to be input for stakeholders in taking theories and views to improve local government performance. this research is to see the extent to which business process re-engineering has an influence in determining strategies for improving local government performance. Keywords: business process re-engineering, local government performance, bibliometric analysis Share Link | Plain Format | Corresponding Author (muhamad sayuti)

208	Engineering	ABS-148
Cross-Layer Analysis of Physically Unclonable Functions in Cyber-Physical Systems Nuniek Fahriani Informatic, Faculty of Engineering, Universitas Muhammadiyah Surabaya, Surabaya, Indonesia *nuniekfahriani[at]ft.um-surabaya.ac.id Abstract Several key factors drive the exploration of PUFs across multiple layers of CPS: rising cybersecurity threats, unique security challenges of CPS, the need for holistic security approaches, scalability, and interoperability. The key objectives and purposes of this analysis include: comprehensive vulnerability assessment, understanding cross-layer dependencies, ensuring device-level security, and preparing for future threats. Physically Unclonable Functions (PUFs) with Computer-Aided Design (CAD) are used for the design, analysis, and verification of electronic systems. PUF designers may utilize CAD tools for designing and simulating PUF circuits. PUFs are investigated for their integration into Cyber-Physical Systems (CPS) to address security challenges in the convergence of physical and digital components. Cross-layer analyses and evaluations aim to understand how PUFs can contribute to the overall security posture of CPS. Here are several domains and disciplines where the findings and implications of this study can be applied: Cybersecurity, Embedded Systems Design, Cryptography, Computer Engineering, IoT (Internet of Things), Information Security, Systems Engineering. Keywords: Physically Unclonable Functions- Cyber-Physical Systems,-Cross-Layer- Threats- Cybersecurity Share Link | Plain Format | Corresponding Author (Nuniek Fahriani)

209	Engineering	ABS-150
Stress Analysis and Fatigue Life Prediction of Portable Rocket Motor Test Stand Using Finite Element Method Lasinta Ari Nendra Wibawa, Iyus Rusyana, Gagan Nugraha, Dinar Koswara, Diyat Muhdiyat, Yopie Kristiyana, Heru Subarkah, and Dedi Irawan National Research and Innovation Agency (BRIN) Abstract A portable rocket motor test stand is essential for evaluating rocket motor performance and components such as the tube, propellant, igniter, and nozzle. Preliminary assessment with this equipment before the RX 200 rocket flight test is crucial, requiring meticulous design calculation for functionality. This study aims to investigate thrust force variations of 10,000, 12,000, 14,000, and 16,000 N. The portable rocket motor test stand employs Aluminium 6061-T6, chosen for its low density, corrosion resistance, and moderate strength. Finite element analysis conducted using Ansys Workbench software evaluates structural integrity. Results from fatigue simulation indicate that the portable rocket motor test stand fails to achieve a service life of 1 million cycles at a thrust of 16,000 N. Keywords: ansys, fatigue life prediction, rocket motor test bed, stress analysis, thrust Share Link | Plain Format | Corresponding Author (Lasinta Ari Nendra Wibawa)

210	Engineering	ABS-152
Design of a Simple Valve Spring Compressor for Maintenance of the Cylinder Head of Tugboat Engine Muhammad Firdaus Jauhari (a*)- Rusmini Sri Maryati (a) - Raihan (a) (a) Politeknik Negeri Banjarmasin, Indonesia *firdaus.jauhari[at]poliban.ac.id Abstract One method of maintaining and repairing engines is through periodic maintenance, which involves implementing preventative maintenance tasks periodically based on calendar time or working hours following the manual instruction book. The Top Overhaul represents the initial phase of maintenance and repair for cleaning, inspection, measurement, analysis, or replacement of all engine parts/materials being overhauled. This research represents the design phase of a specialized tool used in the maintenance procedures of tugboat engines, particularly in the Top Overhaul process. This research involves the design of a simple valve spring compressor, a specialized servicing tool aimed at aiding the process of compressing the spring when installing or removing the valve cotter in the cylinder head of the tugboat engine S6R2-MTK3L. The cotter valve functions to secure the valve with the spring through a retainer component. This cotter valve component is commonly referred to as a split pin, valve keeper, or valve pin. Installing or removing this part is a challenging task, thus requiring a specialized tool to execute it easily without damaging other components. The steps in designing the simple valve spring compressor are as follows: Conducting a literature review and designing the simple valve spring compressor for the maintenance of the cylinder head of the tugboat engine S6R2-MTK3L, performing weight and material strength calculations, conducting trials of the special tool, and comparing the performance before and after the introduction of the special tool. The material chosen for the simple valve spring compressor is alloy steel. The purpose of introducing alloy elements is to attain desired properties suitable for its intended application, including enhancing toughness, tensile strength without compromising ductility, maintaining properties at high temperatures, improving corrosion and fatigue resistance, increasing hardness, enhancing machinability, and augmenting elasticity. The design of the simple valve spring compressor comprises four main parts: the Pillar, Bridge, Sliding Clamp, and Attachment. The use of the specialized tool, the Simple Valve Spring Compressor, enhances the efficiency and accuracy of technicians^ work in maintaining the cylinder head of the tugboat engine S6R2-MTK3L. In practice, this tool enables the valve spring compression process to be more efficient, minimizing potential damage, and reducing the time required for maintenance tasks. As a result, increased productivity and reliability in the engine repair process can be achieved more effectively, allowing technicians to focus on other aspects of engine maintenance and reducing overall vessel downtime. Keywords: Design- Valve- Spring compressor- Tool- Engine Share Link | Plain Format | Corresponding Author (Muhammad Firdaus Jauhari)

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