Journal La Multiapp
International Journal La Multiapp peer reviewed, open access Academic and Research Journal which publishes Original Research Articles and Review Article, editorial comments etc in all fields of Engineering, Technology, Applied Sciences including Engineering, Technology, Computer Sciences, Architect, Applied Biology, Applied Chemistry, Applied Physics, Material Engineering, Civil Engineering, Military and Defense Studies, Photography, Cryptography, Electrical Engineering, Electronics, Environment Engineering, Computer Engineering, Software Engineering, Electromechanical Engineering, Transport Engineering, Mining Engineering, Telecommunication Engineering, Aerospace Engineering, Food Science, Geography, Oil & Petroleum Engineering, Biotechnology, Agricultural Engineering, Food Engineering, Material Science, Earth Science, Geophysics, Meteorology, Geology, Health and Sports Sciences, Industrial Engineering, Information and Technology, Social Shaping of Technology, Journalism, Art Study, Artificial Intelligence, and other Applied Sciences.
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<![CDATA[Usability Evaluation of a Virtual Reality Simulation System for Earthquake Preparedness Using the System Usability Scale (SUS) Method ]]>
<![CDATA[Dirama, Romeo Putra]]>;
<![CDATA[Tranggono, Tranggono]]>;
<![CDATA[Sari, Rizqi Novita]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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<![CDATA[This study aims to evaluate the usability level of the Virtual Reality (VR) simulation system for earthquake preparedness training at the Environmental Agency of East Java Province using the System Usability Scale (SUS) method. The testing was conducted with nine respondents who performed two task scenarios in the simulation and subsequently completed the SUS questionnaire. The analysis covered three main aspects of usability: effectiveness, efficiency, and user satisfaction. The results showed an effectiveness level of 100% (“Highly Effective” category), an average efficiency of 0.01758 goals/second (“Very Fast” category), and an average SUS score of 73.88, which falls into the “Acceptable” category with an adjective rating of “Good.” These findings demonstrate that the VR simulation has strategic potential as an effective and efficient interactive training medium for improving the understanding of earthquake evacuation procedures. Nevertheless, improvements are needed in interface consistency and in reducing the initial learning curve to optimize the user experience.]]>
<![CDATA[Design of Mine Distribution System at Nickel Mining Front of Pt. Cipta Djaya Surya ]]>
<![CDATA[Mulyadi, Mulyadi]]>;
<![CDATA[Chaerul, Muhammad]]>;
<![CDATA[Desi, Natsar]]>;
<![CDATA[Bachtiar, Erniati]]>;
<![CDATA[Harun, A. Yusuf]]>;
<![CDATA[Marzuki, Ismail]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2647
<![CDATA[Nickel mining activities at PT. Cipta Djaya Surya in Molore Village, North Konawe Regency, face a serious problem in the form of stagnant runoff in the mine front area due to the lack of an adequate drainage system and sedimentation pond. This condition not only disrupts smooth mining operations but also has environmental impacts, such as reddish discoloration of coastal waters and potential siltation. This study aims to analyze surface runoff discharge, design open channel dimensions, and design settling ponds appropriate to the hydrological and topographical conditions of the study site. The methods used include collecting rainfall data for the past 10 years from the Meteorology, Climatology, and Geophysics Agency (BMKG), hydrological analysis using the rational method, hydraulic calculations using the Manning equation, and planning channel and settling pond dimensions based on runoff discharge. The results indicate that the maximum runoff discharge in the study area can be managed by designing a trapezoidal open channel with dimensions appropriate to the flow capacity, while the designed settling pond can accommodate the runoff volume without overflowing. The implementation of a planned drainage system is expected to maintain smooth mining operations, minimize the risk of landslides, and mitigate the impact of coastal environmental pollution. Therefore, this research supports the implementation of Good Mining Practice (GMP) principles and can be used as a reference in sustainable mine drainage planning.]]>
<![CDATA[Waste Analysis in Connection Clamp Production Process with Lean Manufacturing and Failure Mode Effect Analysis ]]>
<![CDATA[Hidayatulloh, Faishal]]>;
<![CDATA[Rochmoeljati, Rr.]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2820
<![CDATA[UD H and M Electric is a manufacturing company engaged in the production of medium voltage overhead line (SUTM) components, one of its products is the Connection Clamp. The purpose of this study is to determine the level of waste that occurs and provide suggestions for improvements to reduce waste. The research data used is questionnaire data with respondents who meet the qualifications and know the entire flow of the Connection Clamp production process, as well as waste data that occurs during the production process. To determine the level of waste that occurs and provide suggestions for improvements, the Waste Assessment Model, Process Activity Mapping, Fishone Diagram, and Failure Mode and Effect Analysis methods are used. In the Waste Assessment Model method, the top three critical levels of waste were obtained, namely waste defect of 19.55%, waste motion of 16.88%, waste transportation of 16.10%. In the Failure Mode and Effect Analysis, the Risk Priority Number (RPN) value was obtained from the top three wastes with each sub-waste, namely waste motion sub-waste lifting products manually with a score of 280, waste motion sub-waste rearranging before the process with a score of 240, waste transport, namely the distance of the work station is less than optimal with a score of 200, waste reject sub-waste cracked plates with a score of 168, waste Defect, namely imperfect layers with a score of 168.]]>
<![CDATA[Traffic Impact Analysis of an Underpass on the Performance of Nearby Signalized Intersections Using VISSIM ]]>
<![CDATA[Purba, Yosua]]>;
<![CDATA[Anas, M. Ridwan]]>;
<![CDATA[Mulia, Ahmad Perwira]]>;
<![CDATA[Hasibuan, Gina Cynthia Raphita]]>;
<![CDATA[Tarigan, Johannes]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2830
<![CDATA[Medan City is one of the metropolitan cities with a high level of congestion and population density, resulting in traffic jams, delays, as well as air and noise pollution. This study aims to analyze the performance of intersections on S.M Raja – Halat road, Brigjend Katamso – Mesjid Raya road, and Brigjend Katamso - Pelangi road before and after the operation of the underpass at the Ir.H.Juanda – Brigjend Katamso road intersection using vissim software. Data were obtained from traffic surveys such as vehicle volume surveys, road geometry, traffic signal cycle times, and vehicle speeds. The data obtained from the vissim software simulation results include queue lengths, delays, and level of service at the intersection. For the simulation results at the Ir.H.Juanda – Brigjend Katamso road intersection before the operation of the underpass, the average queue length was 274.3 m and the average delay was 307.38 sec/vehicle, with an average level of service of F (very poor). After the operation of the underpass, the average queue length was 8.38 m and the average delay was 0.96 sec/vehicle, with an average level of service of A (excellent). With a 5-year scenario, the average queue length was 38.53 m and the average delay was 12.34 sec/vehicle, with an average level of service of B (good). Thus, a significant difference is clearly visible between before and after the operation of the underpass, such as the results of queue lengths, delays, and service levels, which have caused new conflicts at the intersections closest to the underpass.]]>
<![CDATA[Analysis of the Quality of Service of the Population and Civil Registration Service Website of Banyuasin Regency Using the E-Govqual Method ]]>
<![CDATA[Anggara, Dayu]]>;
<![CDATA[Yulianingsih , Evi]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2610
<![CDATA[The implementation of information technology by government agencies, particularly through e-government services, has become a necessity to improve the quality of public services. The Population and Civil Registration Office of Banyuasin Regency has provided a website as a digital platform to facilitate various population administration services. The effectiveness and user satisfaction of this website need to be evaluated to determine whether the service quality is optimal. This study aims to evaluate the quality of website services using the E-GovQual method, which measures the dimensions of efficiency, reliability, trust, and user support. Data were obtained through a questionnaire completed by 273 respondents from the Banyuasin Regency community. The results are expected to provide an overview of user satisfaction levels and identify dimensions that require improvement.]]>
<![CDATA[Implementation of the Advanced Encryption Standard 128 Algorithm in the Web-Based Management Information System ]]>
<![CDATA[Sinaga, Setia Handayani]]>;
<![CDATA[Kainde, Quido Conferti]]>;
<![CDATA[Rorimpandey, Gladly Caren]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2622
<![CDATA[The manual management of student dormitory administration at Manado State University presents several challenges, particularly related to record accuracy, service effectiveness, and information protection. This research focuses on the development of a web-based dormitory management information system using the Advanced Encryption Standard (AES) 128-bit algorithm as a data security mechanism, particularly for payment documents. The research method used is a prototype model, which includes communication, rapid planning, modeling, prototype development, and testing. The system is implemented using PHP and MySQL, with the integration of AES-128 encryption in the payment receipt upload feature to ensure data confidentiality. The results of black-box testing show that all system functions run according to user requirements. The implementation of AES-128 has been proven to maintain the security of sensitive data and increase user trust in the system. Key features provided include user registration, room reservations, payments, facility reporting, and notifications, while administrators are given full access rights to manage resident and room data, as well as encrypt and decrypt important information. Overall, this research produces a system that not only improves the efficiency and effectiveness of dormitory management but also strengthens data security aspects. The developed system has the potential for further enhancement through mobile application integration and the implementation of an automated payment system to be more responsive to user needs. Cryptography is a field of science that utilizes mathematical techniques to ensure data and information security, including authentication, integrity, and validity]]>
<![CDATA[Implementation K-Means Algorithm in Promotional Media Destination Tour Minahasa Web Based ]]>
<![CDATA[Moningkey, Efraim]]>;
<![CDATA[Rantung, Vivi Peggie]]>;
<![CDATA[Surbakti, Peliks Andreas]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2659
<![CDATA[Minahasa Regency has great tourism potential with a variety of destinations including cultural, natural, and man-made tourism. However, tourism promotion efforts still face obstacles due to the lack of integrated media capable of grouping destination information based on tourist interests and preferences. This study aims to apply the K-Means clustering algorithm in web-based promotional media to group Minahasa tourist destinations based on the level of user interaction, which is represented by the number of likes and comments on promotional content for each destination. The research method is carried out through several stages, namely collecting tourist destination data, pre-processing interaction data, implementing the K-Means algorithm with a specified number of clusters of three according to the main categories of tourismcultural, natural, and man-made), and implementing the clustering results into a web-based evaluation system that uses the Silhouette Coefficient to evaluate the quality of cluster formation. The results show that the K-Means algorithm is able to effectively group tourist destinations into three clusters that reflect the level of popularity, making it easier for users to find destination recommendations according to their interests. Implementation in a web-based system also provides an interactive display in the form of a list of destinations per cluster and recommendations for popular destinations. Thus, this study proves that the application of K-Means can increase the effectiveness of Minahasa tourism promotion, and in the future it can be developed with the integration of real-time data from social media and comparison with other clustering algorithms.]]>
<![CDATA[A Digital Image Processing–Based Moler Disease Detection System for Shallot Leaves ]]>
<![CDATA[Wahyuni, Reski]]>;
<![CDATA[Hasibuan, Alfiansyah]]>;
<![CDATA[Santa, Kristofel]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2738
<![CDATA[This study aims to design and develop a leaf moler disease detection system on shallots (Allium cepa L.) based on digital image processing in Enrekang Regency, South Sulawesi. Moler disease caused by the fungus Fusarium oxysporum f. sp. cepae is one of the main factors that reduce the quality and productivity of shallots. So far, disease identification is still done manually through direct observation by farmers, which is subjective and time-consuming. To overcome this problem, this study applies the Convolutional Neural Network (CNN) algorithm to automatically classify shallot leaf images into two categories, namely healthy and infected with moler disease. The number of datasets used is 502 images, consisting of 251 healthy images and 251 infected images, with data division of 70% for training, 15% for validation, and 15% for testing. The CNN architecture used consists of convolution, pooling, flatten, and fully connected layers with ReLU and sigmoid activation functions in the output layer. The training process used the Adam optimizer with a learning rate of 0.001 and a binary cross-entropy loss function. Test results showed a training accuracy of 97.14%, a validation accuracy of 94.73%, and a testing accuracy of 97.37%, indicating the model has a good level of precision and generalization ability without overfitting. This system is implemented as a Flask-based web application that allows users to upload leaf images and obtain detection results instantly. This system is expected to help farmers detect diseases more quickly and increase shallot productivity in Enrekang Regency.]]>
<![CDATA[Comparative Analysis of Steel and Timber Truss Structural Strength in Shophouse Buildings Using the Structure Analysis Program Method ]]>
<![CDATA[Paryati, Ninik]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2769
<![CDATA[Wood and steel trusses are two types of materials commonly used in building roof structures, each with its own advantages and disadvantages in terms of strength, durability, cost, aesthetics, and other aspects. This study examines steel and wood trusses from the aspect of strength by designing both types of trusses and then determining the quality of wood and steel materials for analysis using a structural analysis program. The truss design has a span of 18 m with a roof slope of 30°, and the trusses are spaced 2 m apart. The total area of the shop-house building is 12 m × 18 m = 216 m², with a height of 4 m. The truss material uses steel with a grade of BJ 37, while the wood is grade A. The structure of the shop-house uses concrete with a strength of 25 MPa. The dead load consists of a uniform load of 50 kg/m² for the trusses and 150 kg/m² for the shop-house. The live load for the roof (liveroof) is 50 kg/m², while the live load for the shop-house floor is a uniform load of 100 kg/m². The load combination used in the analysis is 1.2D + 1.6L + 0.5Lr. The analysis results show that the bending moment, shear force, and axial force of the steel truss are greater than those of the wood truss because the self-weight of the steel truss is higher than that of the wood truss. The deflection of both steel and wood trusses remains within the allowable limit of 0.3, indicating that the deflections are safe. Based on the structural design check, both steel and wood trusses are safe to use.]]>
<![CDATA[Automatic Fuzzy Logic–Based Nutrient Film Technique Hydroponic System with IoT Integration ]]>
<![CDATA[Akmal, Muhammad]]>;
<![CDATA[Laila, Ida]]>;
<![CDATA[Arifin, Arifin]]>
<![CDATA[ Journal La Multiapp Vol. 7 No. 1 (2026): Journal La Multiapp ]]>
Publisher : <![CDATA[Newinera Publisher ]]>
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DOI: 10.37899/journallamultiapp.v7i1.2809
<![CDATA[This study addresses the need for efficient crop cultivation solutions, particularly in urban areas, by developing an automatic Nutrient Film Technique (NFT) hydroponic system integrated with the Internet of Things (IoT). Traditional hydroponic systems often require intensive monitoring and can be rigid in adapting to changing conditions, especially when using binary logic for control. The proposed system utilizes fuzzy logic as its core calculation method to manage uncertainty in decision-making, allowing for more flexible control than classical binary logic. It incorporates pH, Total Dissolved Solids (TDS), temperature, and water level sensors, connected to an Arduino Nano and ESP32 microcontroller. Data is stored and communicated in real-time via Firebase, and the system is controlled through an Android application developed with MIT App Inventor. This design aims to enhance automation, improve system control, and enable more efficient management of hydroponic operations.]]>
