International Conference on Engineering, Applied Sciences and Technology

ANALYSIS OF FILL SWITCH FAILURE LEADING TO TRANSMISSION INABILITY TO SHIFT SPEEDS IN THE HAULPAK 530M UNIT

Rasma Rasma — 2024-11-28

The Haulpak 530M unit utilizes a Torqflow Transmission as its power transmission system, where the Torqflow Transmission is a fluid-controlled power transmission device that regulates the speed, forward, and reverse motion, as well as the crucial function of increasing torque by reducing the rotational speed through the gear ratio of the transmission. The Electric Control Modulating Valve plays a crucial role in this system, as it is responsible for modulating the oil pressure entering the clutch in the transmission to facilitate gear shifting. However, the Haulpak 530M unit has encountered an issue where the "02" (b021) error message, indicating a lock-up clutch failure, is displayed on the Message for Operation and Maintenance monitor, preventing the unit from moving forward beyond the F2 gear, limiting its top speed. The root cause of this problem is the failure of the Fill Switch component, which is responsible for the proper functioning of the ECMV and the lock-up clutch.

CULTURAL COMMUNICATION IN PAPUA'S MUSLIM COMMUNITY PERSPECTIVE OF RELIGIOUS MODERATION

Rahmat Hidayat — 2024-11-28

By rejecting extremism and liberalism in religion, religious moderation is a way of view, attitude, and behavior by taking a middle path that is fair, balanced, and not extreme in carrying out religious worship. is the key to balance and peace, respecting each other, accepting differences, and living together in peace and harmony. The villages of Warmon Kokoda and Arar are located in Sorong Regency, and the majority of the population are indigenous Papuan Muslims. They live in harmony and are comfortable in their daily lives, which makes this interesting and unique. Researchers want to study the way cultures or ways they communicate in order to coexist with safe and peaceful non-Muslim communities. The purpose of this study is to determine how cultural communication is applied to the Papuan Muslim community in terms of religious moderation in Warmon Kokoda and Arar Villages, Sorong Regency. This research was conducted using a qualitative methodology. Data were collected through interviews and observations from participants. The results of the study show that some of the cultural communication patterns of the Papuan Muslim community in Arar and Warmon Kokoda villages include: (1) Using regional languages, (2) Collaborating with community leaders, (3) Participating in discussions and training, (4) Using local media, (5) Building a network of cooperation, (6) Adapting messages to local contexts, (7) encouraging active participation, and (8) providing examples. It is hoped that the understanding and practice of religious moderation that is more in line with the culture and values of the Papuan Muslim community will increase with the implementation of the above steps thoroughly and systematically.

SYSTEMATIC ANALYSIS OF MATHEMATICAL FUNDAMENTALS IN ELLIPTIC CURVE CRYPTOGRAPHY: CONCEPTS, APPLICATIONS, AND CHALLENGES

Miftah Sigit Rahmawati — 2024-11-28

This study aims to systematically analyze the mathematical fundamentals underpinning Elliptic Curve Cryptography (ECC) by reviewing its key concepts, applications, and challenges. Utilizing literature from Springer, Sagepub, and Mendeley databases, several essential mathematical concepts, such as the basic operations in ECC, including addition and multiplication. Furthermore, the challenges in solving the Elliptic Curve Discrete Logarithm Problem (ECDLP), which forms the foundation of ECC security, are discussed, along with the implementation of cryptographic protocols. This review also explores practical challenges in applying ECC to modern cryptographic systems, including key management and secure communications, and the theoretical implications of evolving algorithms. This article categorizes previous research into three main areas: (1) ECC concepts covering discussions on elliptic curves, cryptology, and pre-cryptological operations, (2) ECC applications in various encryption methods and models, such as the ECC encryption model, ECDSA, and ECDH, and (3) challenges in ECC implementation as a computational model. The results show that while the foundational algebraic theories supporting ECC have been developed, further research is required to enhance the effectiveness and efficiency of ECC in the future. This study serves as a groundwork for more in-depth research on algebraic structures in the formation of ECC.

REDUCTION OF DEFECT RATE IN THE LINE MAINTENANCE INSPECTION PROCESS USING SIX SIGMA METHOD IN AN INDONESIAN AIRLINE.

Uti Roysen — 2024-11-28

An airline in Indonesia conducted an average of 21 inspection activities on 99 Boeing Series aircraft during the period from January 2024 to June 2024. The company aims to improve efficiency by reducing the number of inspections to 5 activities per aircraft. This study aims to determine the current sigma level, identify the root causes of the high number of inspection occurrences, evaluate the outcomes of the implemented solutions, and determine the sigma level after the improvements. The research employs Six Sigma methodology and 5W1H. The results indicate that the primary causes of defects were insufficient training for engineers/mechanics, poor component quality, and outdated inspection tools. After implementing corrective actions such as retraining, updating SOPs, replacing low-quality components, and upgrading inspection tools, defects were reduced from 2,055 occurrences on 99 aircraft to 400 occurrences on 73 aircraft. Consequently, the DPMO decreased from 104,309 to 27,534.93, and the sigma level improved from 2.796 to 3.214. This study demonstrates that a systematic Six Sigma approach can enhance efficiency and quality in aircraft maintenance..

MENTORING OF DIGITAL MARKETING MANAGEMENT AND BUSINESS COMMUNICATION OF POKDARWIS IN BINONG URBAN VILLAGE, BANDUNG

Daniel Hermawan — 2024-11-28

This mentoring seeks to enhance partner empowerment, particularly in knowledge and skills related to digital marketing management and business communication. Both facets of these activities are significant, given the status of the partners who are still developing tourism urban villages that necessitate assistance in capacity building, particularly for members of the tourism awareness group (kelompok sadar wisata/Pokdarwis). The advancement of the tourism sector in the Binong Jati Knitting Creative Tourism Urban Village necessitates the support of proficient human resources capable of effectively tourism components—attractions, activities, amenities, accessibility, and accommodation—through appropriate management, community empowerment, and promotion. With the provided assistance, members of the Pokdarwis Binong Jati Urban Village are anticipated to delineate what can be observed (what to see), what can be executed (what to do), what can be transported (what to bring), and what can be acquired (what to learn) through digital marketing management, which encompasses content marketing and social media marketing, alongside business communication, which includes public speaking and basic English skills. The implementation of the proposed solutions is categorized into five stages: socializing, training, technological application, mentorship and evaluation, and program sustainability. To address the partners' requirement for enhancing the human resource capacity of Pokdarwis members, particularly in digital marketing management and business communication, the proposed solution involves mentoring aimed at elevating partner empowerment in knowledge and skills, which will be measured using straightforward assessment tools, specifically normative tests and skill assessment matrices. Mentoring has effectively enhanced partner empowerment in digital marketing management and business communication.

ANTIBACTERIAL ACTIVITY OF Bacillus sp ISOLATED FROM LIWA BOTANICAL GARDEN SOIL AGAINST Dickeya sp.

Kusuma Handayani — 2024-11-28

The soil Bacillus group has been reported to produce antibacterial compounds. One of the plant pathogenic bacteria is Dickeya sp. which causes A strain of Bacillus bacteria from the soil of the Liwa Botanical Garden (KRL) has been successfully found and showed antibacterial activity against Dickeya sp. The Bacillus strain has been characterized as Bacillus vallismortis RKB1 strain through 16S rRNA phylogenetic analysis. This study aims to determine the activity of antibacterial compounds of Bacillus from KRL soil against Dickeya sp. Crude extract produced from liquid culture of Bacillus vallismortis RKB1 on antibacterial production medium showed antibacterial activity against Dickeya sp. Separation of compounds from crude extract by open column chromatography produced 8 fractions and there were 3 active fractions that showed inhibition against Dickeya sp. in the antibacterial activity test through agar disc diffusion. Fraction 54 showed the greatest inhibition and was classified as strong with an inhibition zone of 13.5 mm at a stock concentration of 5000 μg/ml. The fraction has a Minimum Inhibitory Level (KHM) at a concentration of 500 μg/ml based on turbidity value and resazurin staining through liquid microdilution. The identification results of Thin Layer Chromatography (KLT) on the active fraction with eluent n-hexanaana: ethyl acetate (7:3) showed a polar complex .This indicates that the compounds in the active fraction contain peptide compounds.

LEAD-TIME IMPROVEMENT OF KAM CUTTER PROCESSING USING THE POKA-YOKE METHOD AT A MANUFACTURING COMPANY IN CIKARANG

Singgih Juniawan — 2024-11-28

The KAM Cutter is a cutting blade used to manufacture plastic pellets through underwater pelletizing. A manufacturing company in Cikarang reported that, on average, an order completion rate for KAM Cutter for 2023-2024 was 12,51%, which is highly below expectations. This research will improve production capacity by enhancing lead time on the production floor. Lean Manufacturing tools used in the research involve Value Stream Mapping, Fishbone Diagram, Poka-Yoke, and Fixture Design. The findings of this research have revealed that by using a new fixture design, the CNC Milling process can reduce the lead time from 15,24 minutes to 2,09 minutes per unit and reduce the Surface Grinding process from 14,88 minutes to 0,87 minutes per unit while maintaining an overall lead time reduction of 84,38%, from 32 minutes to 5 minutes per unit. The above improvements increased production capacity from 6.507 units/year to 49.518 units/year, approaching the target of 54.000 units/year while boosting the company's revenue from IDR 2,47 billion to IDR 18,81 billion per year. Besides, the Non-Value-Added process time was reduced by 68,72%, reflecting significant efficiency improvements in the production process.

ANALYSIS OF LOW POWER ISSUES IN KOMATSU D85ESS-2 DOZER ENGINES

Hendro Purwono — 2024-11-28

The Komatsu D85ESS-2 dozer is one of the heavy machines employed by PT. Andhifa Kharisma Borneo Pratama (AKBP) at the PT. Prolindo Cipta Nusantara (PCNS) site in coal mining operations. This dozer is utilized for tasks such as excavation, grading, material pushing, and hauling logs or portable camps. However, due to several factors, this unit has experienced an "engine low power" issue, impacting its performance. This report addresses the root causes of this problem and proposes solutions to prevent recurrence. This study uses an observational approach aimed at identifying and analyzing the factors causing the low power issue. Data collection was conducted by gathering relevant information about the unit’s operational conditions as experienced by operators in the field. A systematic troubleshooting procedure was applied to detect and resolve issues, allowing for precise repairs to restore the unit's performance. The study follows an 8-step troubleshooting process and uses a troubleshooting chart to assess the symptoms of the low-power issue. Findings indicate that engine low power was caused by sediment buildup in the fuel filter, which restricted fuel flow to the nozzle, leading to reduced fuel injection.

ENHANCING URBAN TOURISM: A GAMIFIED DESIGN FOR SUSTAINABLE USER ENGAGEMENT

Johannes Hamonangan Siregar — 2024-11-28

Urban tourism faces significant challenges, including overcrowding and environmental degradation, necessitating innovative approaches to enhance visitor experiences and promote sustainable practices. This research aims to investigate how gamification can enhance urban tourism by encouraging the exploration of lesser-known areas and local businesses, thereby promoting sustainable user engagement. The problem of low engagement with local attractions and businesses is considered by developing a gamified tourism application that incorporates game elements such as challenges, rewards, and interactive storytelling. The application employs the System Development Life Cycle methodology, which includes stages of planning, analysis, design, implementation, and testing to ensure a user-centered approach. Through user feedback and usability testing, the research findings reveal that these gamification strategies significantly enhance user satisfaction and promote responsible tourism behaviors. The application not only enriches the immediate travel experience but also encourages ongoing interaction with the destination, extending engagement beyond the visit. This research contributes to the information systems field by demonstrating how gamified solutions can effectively address contemporary urban tourism challenges, ultimately supporting sustainable practices and strengthening community ties.

INCREASING PRODUCTION CAPACITY WITH THE CUT AND TRY METHOD IN ANDESITE MINING

Eka Irawanti — 2024-11-28

The andesite mining industry in Cilegon needs help in meeting the increasing market demand, especially in the Split 1-2 product, which has an annual production capacity of 349,418 tons compared to the demand of 454,238 tons. This research aims to increase production capacity through the application of the cut-and-try method. This method identifies the optimal solution through repeated experiments on various operational strategies. The analysis uses the Simple Moving Average, Exponential Moving Average, and Mean Absolute Percentage Error (MAPE) approaches for demand forecasting, as well as aggregate planning evaluation, to align capacity with market demand. The results show that the cut-and-try method provides flexibility in adjusting production strategies in real-time, allowing for increased productivity, reduced downtime, and more efficient inventory management. Two production planning scenarios were tested, namely Production Plan 1, with variations in inventory and stock depletion, and Production Plan 2, which uses constant labour and overtime. Of these two scenarios, Production Plan 2 proved to be more cost-effective, with a total expenditure of IDR 1,413,258,340 compared to IDR 2,357,596,694 in Production Plan 1.

SERVICE QUALITY IMPROVEMENT IN A PLASTIC PELLET CUTTING TOOL MANUFACTURING COMPANY USING THE SERVQUAL, IPA, AND QFD METHODS

Ades Yulia Apriani — 2024-11-28

A manufacturing company that produces plastic seed-cutting tools received complaints accounting for 65% of the total shipments made over a year. This study aims to improve and mitigate corrective actions that can enhance the company's service quality. The methods used in this research include the Servqual method, followed by determining improvement variables using the IPA (Importance-Performance Analysis) method and seeking improvement solutions using the QFD (Quality Function Deployment) method. The results show nineteen indicators of the gap between Perception and Expectation, with a negative range from -2.0777 to 0.0485, indicating the need for improvement. The IPA analysis identified four key indicators as priorities for enhancement. In contrast, the QFD analysis, processed into a HOQ (House of Quality) matrix, identified four key areas that need improvement, namely: QC training with a score of 6 (13.64%), IT personnel recruitment with a score of 9 (20.45%), recalculating production costs (HPP) with a score of 10 (22.73%), and production process optimization with a score of 19 (43.18%).

Effect of Cu-MOF Catalyst Impregnated with K2O to Enhance Pyrolytic Catalytic Cracking of Waste Cooking Oil for Biofuel Production

Tri Widjaja — 2024-11-28

Waste oil can be converted to fuel through complex processes due to its high impurity level and significant oxygen content. This research explores the use of pyrolysis together with metal-organic frameworks (MOFs) to enhance the conversion of waste oil. MOFs, porous crystalline materials formed by linking metal ions with organic linkers, provide moderate surface area and increased active sites for catalytic applications, especially in bioproduction. In this study, copper-based MOFs (Cu-MOF) were synthesized via a room temperature method using CuSO₄-5H₂O and 2-methylimidazole, followed by wet impregnation with K₂O. The synthesized catalysts were characterized using FTIR, SEM, and BET and the biofuel production using GC-MS. The characterization results showed that K₂O impregnation enhanced the stability of MOF structure and significantly improved thermal stability as well as made it more efficient for the pyrolytic catalytic process for biofuel production. FTIR analysis confirmed the successful impregnation of K₂O, SEM analysis showed that the Cu-MOF particles did not have a clear crystal shape. From BET analysis, there is a decrease in surface area due to K₂O impregnation. Gas chromatography-mass spectrometry (GC-MS) confirmed that the pyrolytic reaction occurred by using Cu-MOF/K₂O catalyst can significantly increase the hydrocarbon compounds of the waste cooking oil to 39.25% as well as decrease the oxygen content contained in the oil to 56.65% according to the reaction in the pyrolytic catalysis cracking process. Importantly, the catalyst showed regeneration potential after use, proving its feasibility for repeated application in waste oil conversion processes.

Application of the Open Learning Model to Improve the Creative Thinking Ability of Elementary School Students

Trisna Cahaya Sakti — 2024-11-28

Creative thinking is an important ability for students because it allows them to generate new ideas that are effective to solve problems or create something innovative, but in contrast to what is in the field, it can be seen that there is a lack of maximum learning applied in the classroom in creative thinking. The purpose of this study is to find out whether the application of the open learning model at SDN Perigi 01 improves students' creative abilities. This research is quantitative with a Pre-Experimental design in the form of One-Group Pretest-Posttest. The sample obtained by grade IVB students consisted of 30 students. The instruments in this study are pretest posttest and data processing using SPSS 26. The results of the study were obtained by Sig. (2-tailed) 0.000. Where 0.000 < 0.05, then Ho was rejected and Ha was approved, and the N-Gain results showed an average pretest score of 6.93 and an average posttest score of 10.7 and an N-Gain score of 0.71 with high interpretation. This study found that students had better creative thinking skills after open learning

Normalization Method for Earlier Foulant Detection on A Reverse Osmosis Membrane Surface

MK Ummam — 2024-11-28

Operating Brackish Water Reverse Osmosis (BWRO) unit which a membrane technology in a water treatment system, operating parameters found to alter causing permeat flow and salt passage to shift, which leading to inaccurate evaluation of membrane condition. The observed operating parameters must be standardized in order to discern between such typical events and performance variations owing to fouling or issues called Normalization. Among normalization parameters, the objective of this work is to evaluate RO membrane condition using Normalized Permeate Flow (NPF) method at constant recovery setup applied in an RO plant facility of a factory located in Cilegon, Banten, Indonesia. The NPF show distinguish result compared to actual permeate flow (Qpa). Qpa tends to stable or a slow deterioration at 7%, which leading inaccurate conclusion since Qpa is spot data. In contrast, NPF shows 27% drop of membrane performance since its first run until the end of running cycle and the membrane must be immediately clean. In conjunction with NPF, applied pressure (Pfa) tended to increase up to 23.7%. Such higher Pfa is required to solve the osmotic pressure on feed-brine surface of the membrane even with the same amount of product. The higher osmotic pressure is caused by foulant on the membrane surface even with constant raw water concentration. Chromatic Elemental Imaging^SM(CEI^SM) and Energy Dispersive Spectroscopy (EDS) analysis methods are used to understand type of foulant on the membrane surface. CEI detected a high weight percent of silicon as the primary foreign inorganic elements present on the membrane surface, while EDS analysis detected a layer of silicate at 40.22% wt. coated the membrane surface evenly.