Publication Search

Typhoid fever is a significant health issue caused by the Salmonella Typhi bacteria, leading to symptoms such as fever, abdominal pain, diarrhea, muscle pain, and serious complications if not treated promptly. A common challenge faced by society is limited access to medical professionals, especially in remote areas, and delays in recognizing symptoms. To address this problem, this study designs and implements a web-based expert system using the Certainty Factor (CF) method, which helps diagnose typhoid fever quickly and accurately. The Certainty Factor method is used to calculate the certainty level of the symptoms experienced by the patient, providing a diagnosis result in the form of early-stage typhoid, mild typhoid, or severe typhoid. The system was developed using PHP programming language and MySQL database, and tested at RSUD Djoelham Binjai City. The research data was obtained from patients at RSUD Djoelham Binjai with a case study on patient number 22. The processing of symptoms through Certainty Factor calculation showed that the patient is most likely to have severe typhoid with a certainty value of 0.9443 or 94.43%. This result proves that the Certainty Factor method can be used to assist in providing an accurate early diagnosis of typhoid fever with a high degree of accuracy.

This research was conducted with the aim of optimizing the assignment of working hours in the Procurement Division of PT. Pelindo Multi Terminal through the application of the Hungarian method. The fundamental problem faced is the imbalance between the number of permanent workers and the high workload that must be completed, thus creating a risk of inefficiency in the operational process. To address this problem, a quantitative approach was used with linear programming modeling techniques designed to produce a more systematic and measurable assignment allocation. Through the analysis conducted, an optimal solution was obtained regarding the distribution of working hours, where the total working time can be reduced to 10,120 minutes per month, lower than the previously set maximum limit of 10,560 minutes per month. These results indicate that the application of the Hungarian method is not only able to reduce excessive workloads on some employees, but also ensures a more proportional distribution of assignments among all available workers. In addition, this method can increase operational effectiveness because each worker receives a load according to their capacity, so that the risk of fatigue or decreased performance can be minimized. The findings of this study confirm that the Hungarian method is an alternative work scheduling strategy that is efficient to be applied in industrial environments with high task complexity. Proper implementation can also support the achievement of overall company productivity, improve the quality of human resource management, and strengthen the company's competitiveness in facing future operational challenges.

Micro, Small, and Medium Enterprises (MSMEs) are strategic sectors in the Indonesian economy, but often face challenges in efficient and data-driven production management. This article highlights the urgency of the Real Work Lecture (KKN) program as a form of student service in assisting MSMEs, especially in optimizing the production of snacks typical of Tebing Syahbandar. This research aims to optimize the production output of the Untir-untir Titik Factory with an Integer Linear Programming (ILP) approach using the Branch and Bound algorithm. Primary data is obtained through interviews and production documentation, including product type, raw material needs, operational costs, selling prices, and profit margins. The initial analysis was carried out using the simplex method using POM QM software to obtain a linear solution, which was then refined with the Branch and Bound algorithm so that the results were in the form of integers. The results of the study showed that the optimal solution was achieved by producing 25 bales of kolong-kounder and not producing other types of snacks, resulting in a profit of Rp1,650,000 per day. These findings show that the ILP approach with Branch and Bound is able to significantly increase the efficiency and profitability of MSMEs. In addition, this method can be used as a basis for quantitative-based production decision-making. This research also emphasizes the strategic role of KKN in technology transfer and real solution-based assistance for MSME actors in the region, thereby supporting the sustainable strengthening of the local economy.

Currently, the use of data mining technology has become essential in enhancing business management efficiency, including in the trending coffee shop industry. Data mining allows business owners to analyze sales information in depth, enabling more accurate decision-making regarding inventory management, promotions, and sales strategies. This study aims to implement the Apriori algorithm to analyze sales data at Menrabic Coffee Shop. The Apriori algorithm is used to discover association patterns or relationships between products frequently purchased together by customers, which can assist management in providing inventory that aligns with customer preferences. The research method illustrates the detailed implementation process of the Apriori algorithm, starting from sales data collection, data cleaning, programming, and analysis of the results. The implementation uses web programming languages such as HTML, CSS, MySQL, and JavaScript, while back-end logic is programmed with PHP. The results of applying this algorithm reveal the most popular sales patterns among customers, providing valuable insights for management to improve operational performance and customer satisfaction. Therefore, this study demonstrates that applying data mining with the Apriori algorithm can be an effective tool for understanding consumer behavior and supporting data-driven decision-making at Menrabic Coffee Shop. By utilizing these insights, management can optimize inventory, enhance sales strategies, and ultimately increase overall business efficiency.

The academic information system is a crucial element in managing academic data in higher education institutions. Universities require an efficient information system to manage student data, faculty, courses, and other academic administration. This study develops an SQLPage-based information system to provide a lightweight and user-friendly web-based solution. SQLPage enables the creation of web applications directly from a MySQL database without requiring complex programming. The research results show that this system can improve the efficiency of academic data management and ease of access to information for users

The development of IT has a huge impact, so all information can be obtained easily and quickly. In addition, technology can help many humans in all activities in organizations, companies, and schools. Researchers designed an information system to provide an overview or profile of an elementary school, SD Negeri 4 Puu Kapaka. The system was built using the PHP and MySql programming languages with the codeigniter framework. The school profile information system can provide information about schools, facilities, news, and also activities that have been carried out by the school. The results of this study show that this application using the Codeigniter framework can meet the needs of the system desired by the school.

This research discusses the development of a donor module on the SiKembar (Barang Entry and Exit Information System) web-based application, designed to optimize the management of donor data and donation aid during natural disasters. The module is developed to facilitate the donation submission process from the public, ultimately aiming to improve coordination between the community, government, and BPBD (Regional Disaster Management Agency) of Cianjur Regency in managing and distributing post-disaster aid. The development method used in this module is web-based, utilizing PHP programming language and the CodeIgniter framework. The CodeIgniter framework was chosen for its ease of use in building structured and flexible web applications. The donor module developed is integrated into the existing SiKembar platform, allowing for more efficient and organized donor data management. The main feature introduced in this module is the donation submission, which enables the public to directly donate and track the status of their submitted donations through the platform. The results of the research indicate that this module facilitates a more structured and responsive donation submission process. Both donors and administrators can easily access and manage information related to the aid needed and the status of received donations. This enhances transparency and efficiency in donation data management while minimizing the potential for errors in aid distribution. The donor module on the SiKembar application is expected to increase the effectiveness of managing donor data and handling aid following natural disasters. With this system, the aid distribution process will be more organized and faster, while also facilitating better coordination among the involved parties. Ultimately, this module can contribute to accelerating post-disaster recovery and ensuring that aid reaches those in need in a timely manner.

Efficient management of patient queues is essential in healthcare systems to ensure timely care, optimize resource utilization, and enhance patient satisfaction. Mathematical programming, particularly when applied in conjunction with queuing theory and optimization models, provides a rigorous framework for analyzing and improving healthcare service delivery. This approach involves modeling arrivals and service processes, applying queuing models (such as single-server, multi-server, and priority queues), and formulating optimization objectives—often to minimize total costs, patient waiting times, or resource idling. Recent research demonstrates that combining queuing theory with mixed-integer programming and simulation techniques enables healthcare managers to allocate resources dynamically, set staffing levels, and assign priorities among different patient categories. For example, the use of mixed-integer programming can determine the optimal number of servers, beds, and service rates based on patient flow and priority needs, striking a balance between reducing waiting times for critical cases and controlling operational costs. These mathematical models also account for practical constraints and stochastic variability inherent in clinical settings. Applications span emergency departments, outpatient clinics, and even pharmacy and blood service centers—showing significant improvements in system efficiency, reduced patient wait times, and enhanced overall care quality. Thus, mathematical programming is a powerful decision-support tool for queue management, offering evidence-based strategies to address congestion and resource allocation challenges in complex healthcare environments.

This research aims to develop a transaction data security system on the web-based Pancadaya Waste Bank application by applying a hybrid cryptographic algorithm that combines Advanced Encryption Standard (AES) and Rivest Shamir Adleman (RSA). The problem faced in the previous system is the weak recording and security of customer transaction data, because the process is still carried out manually so that it is prone to recording errors, loss of important information, and potential misuse of data by unauthorized parties. To answer these problems, this study uses the Rapid Application Development (RAD) method which allows the application development process to be carried out quickly, flexibly, structured, and according to user needs. The research method used was a qualitative approach with interview techniques with the management of the Pancadaya Waste Bank and the Environment Office, as well as an in-depth literature study on the application of hybrid cryptographic algorithms in modern information systems. The system is built using the PHP programming language, MySQL database, and OpenSSL library as the main support for the data encryption and decryption process. The implementation of the algorithm is carried out by encrypting transaction data using AES for efficiency and speed, then the AES key is secured through RSA to ensure a higher level of security while preventing illegal access. The test results showed that the system was able to encrypt and decrypt transaction data in real-time, as well as display transaction results in the form of digital notes on deposit and balance withdrawal activities. In addition, performance tests using GTmetrix showed that the application has excellent speed, stability, and processing efficiency, making it feasible to be widely implemented in Pancadaya Waste Bank operations.

This study aims to optimize the cake production profit at Cake by Cece using the Branch and Bound algorithm. The data used include raw material requirements per batch, daily raw material availability, and selling prices for three types of cakes: Cookies, Brownies, and Cinnamon Roll. The optimization model is formulated as an Integer Linear Programming problem with the objective of maximizing total daily profit. The model is solved using the simplex method followed by the Branch and Bound algorithm to obtain valid integer solutions. The results indicate that the optimal production combination is 2 batches of Cookies, 2 batches of Brownies, and 3 batches of Cinnamon Roll, yielding a maximum profit of IDR 233,000 per day. This solution satisfies all raw material constraints and is feasible for daily operational implementation. This study provides quantitative recommendations to support production decision-making in culinary sector MSMEs.

The manual payroll process for honorary staff at the Department of Trade of Nabire Regency often leads to calculation errors and administrative delays, affecting employee satisfaction. This study aims to develop a more efficient and accurate payroll information system. The system is designed using the Java programming language and MySQL database, following the Waterfall development method. Through requirements analysis, design, implementation, testing, and evaluation, the system has been developed to improve the accuracy and effectiveness of the payroll process. Test results show that the system successfully reduces calculation errors by up to 90% and shortens the payroll processing time. Therefore, this system is expected to be a practical solution for the Department of Trade to manage honorary staff payments more effectively.

In the current digital era, managing sales transactions manually is inefficient and prone to recording errors. This research aims to develop a web-based Point of Sale (POS) application for the Phi Phi Thai business using the Extreme Programming (XP) software development methodology. XP was chosen for its support of rapid iteration, adaptability to changing user requirements, and strong collaboration between developers and stakeholders. The developed application includes key features such as user registration and login, product ordering, menu and customer management, expense tracking, and financial and sales reporting. Testing was conducted using the Black Box Testing method to ensure that all functionalities performed according to specifications. The implementation results indicate that the application improves operational efficiency, reduces transaction errors, and provides real-time information for business owners to support better decision-making. Furthermore, the application of Extreme Programming (XP) methodology in the development process allows time for regular evaluation and refinement of the application based on feedback from end users. Each iteration produces a version of the software that can be immediately tested and used, minimizing the risk of system failure during final implementation. This approach also encourages lightweight yet relevant documentation and open communication between the technical team and business owners. Thus, the developed Point of Sale application not only meets current functional requirements but also has a high degree of flexibility for further development as Phi Phi Thai's business grows in the future.

This study examines the perceptions of the Pucangadi Village community towards the educational children's program "SiBobo" broadcast by TVRI Central Java. This research uses a descriptive qualitative approach, with data collection techniques through in-depth interviews with fifteen informants selected purposively. Informants consisted of parents, teachers, and local residents who have views regarding the program. The purpose of this study was to explore the extent to which the program "SiBobo" is accepted and has a positive impact on the development of children in the community. The results showed that the program "SiBobo" is considered an entertaining and educational learning medium by the majority of informants. This program successfully conveys moral and social messages relevant to children's lives, such as the values ​​of togetherness, social awareness, and the importance of protecting the environment. This program is also considered able to attract children's attention in a fun way, making them interested in learning while playing. In addition, the content presented in this program can increase children's knowledge about local culture and wisdom, which is expected to increase their love for Indonesian culture. However, despite "SiBobo"'s high educational value, the presence of gadgets and children's preference for digital content, such as YouTube videos and game apps, often divert their attention from public television. Children are more interested in shows they can access anytime through their devices. This suggests that while television shows like "SiBobo" still play a significant role, competition from digital media presents a significant challenge. This study emphasizes the importance of revitalizing children's programming based on local values ​​and the need for more adaptive communication strategies to optimally convey educational messages.

Manual letter archiving in government institutions often faces various challenges, such as limited storage space, the risk of document loss, and slow information retrieval processes. This study aims to design and implement a web-based letter archiving information system as a solution to improve the efficiency and transparency of document management at the Forestry Office of Central Papua Province. The system development method adopts the Scrum approach, allowing for iterative development and adaptability to changing user needs. The system was built using the PHP programming language and a MySQL database, and includes features such as archiving incoming and outgoing letters, document tracking, quick search functionality, and archive category management. The implementation results show that the developed system significantly enhances the speed and accuracy of letter management, minimizes data entry errors, and strengthens institutional accountability and operational efficiency. This system provides a substantial contribution to the digitalization of public administration services, particularly in managing official documents.

The rapid development of technology has made it increasingly important for the younger generation to acquire digital literacy skills at an early age. As technology becomes an integral part of daily life, it is essential to introduce fundamental programming concepts to students to prepare them for the future. This community service program aims to introduce 5th-grade students at Elementary School Emmaus Kediri to basic programming concepts using the Scratch platform. The program adopted the Project-Based Learning (PjBL) method, which emphasizes interactive learning through hands-on activities. The one-day session involved 17 students, who underwent a structured process consisting of a pre-test, material delivery, hands-on practice of creating simple animations, and a post-test. The learning materials included an introduction to the Scratch interface, how to use sprites, and basic coding blocks to develop simple animation projects. The evaluation results indicated a significant increase in students' understanding of basic programming concepts. The majority of participants successfully created simple animation projects using coding blocks and sprites, demonstrating their ability to apply the learned concepts. The students showed high enthusiasm throughout the learning process, indicating a strong interest in digital learning and coding. The high level of engagement further supports the potential for expanding similar programs in the future. This community service activity proved effective in introducing computational thinking and fostering creativity among elementary school students. It also demonstrated the effectiveness of interactive and hands-on learning approaches in enhancing students' digital literacy. As a result, this program has the potential to be implemented in other schools to promote early exposure to programming and support the development of digital skills among young learners

The rapid development of technology has made it increasingly important for the younger generation to acquire digital literacy skills at an early age. As technology becomes an integral part of daily life, it is essential to introduce fundamental programming concepts to students to prepare them for the future. This community service program aims to introduce 5th-grade students at Elementary School Emmaus Kediri to basic programming concepts using the Scratch platform. The program adopted the Project-Based Learning (PjBL) method, which emphasizes interactive learning through hands-on activities. The one-day session involved 17 students, who underwent a structured process consisting of a pre-test, material delivery, hands-on practice of creating simple animations, and a post-test. The learning materials included an introduction to the Scratch interface, how to use sprites, and basic coding blocks to develop simple animation projects. The evaluation results indicated a significant increase in students' understanding of basic programming concepts. The majority of participants successfully created simple animation projects using coding blocks and sprites, demonstrating their ability to apply the learned concepts. The students showed high enthusiasm throughout the learning process, indicating a strong interest in digital learning and coding. The high level of engagement further supports the potential for expanding similar programs in the future. This community service activity proved effective in introducing computational thinking and fostering creativity among elementary school students. It also demonstrated the effectiveness of interactive and hands-on learning approaches in enhancing students' digital literacy. As a result, this program has the potential to be implemented in other schools to promote early exposure to programming and support the development of digital skills among young learners

The advancement of digital technology has driven significant transformation in the field of education, particularly in the innovation of learning media that is interactive and easily accessible to students. The subject of Pancasila and Civic Education (PPKn), as a crucial component of character education, must adapt to these developments to ensure that the material remains relevant and engaging for today’s digital generation. This community service activity aimed to enhance students' learning motivation by conducting a training program on creating educational applications using the no-code platform Thunkable. The focus of the training was on the topic of national political figures, which is part of the core competencies in the PPKn curriculum. The activity was held at SMA Ampera in Sorong City, involving 11th-grade students as active participants. A participatory and project-based learning (PjBL) approach was employed, in which students were guided to design, create, and test their own educational applications based on their ideas and creativity. The program was carried out in three stages: preparation (developing modules, training materials, and technical setup), training and practice (introduction to the Thunkable platform, interface design, and basic programming), and testing and evaluation (application trials by other students and effectiveness assessment). The results of the activity showed a significant increase in students' learning motivation, basic digital skills, and active engagement in the learning process. The participants successfully created educational application prototypes featuring visual content, brief narratives, and interactive quizzes about national political figures. Moreover, students demonstrated collaborative attitudes, innovation, and confidence when presenting their work. This activity demonstrates that a project-based learning approach supported by Thunkable technology can be an effective alternative for creating meaningful, contextual, and empowering learning experiences. It is especially beneficial for schools with limited access to digital technology. By integrating creativity and digital tools into civic education, students are encouraged to become not only technologically literate but also more engaged in understanding national identity and political history in a modern, accessible way.

Employee shift scheduling in the hospitality industry remains a critical yet complex task due to fluctuating operational demands, fairness requirements, and labour regulations. Many hotels still rely on manual scheduling methods, which are time-consuming and prone to biases, particularly in ensuring fair workload distribution across employees. Despite numerous studies on workforce scheduling, limited attention has been given to integer linear programming (ILP) models that address gender-based restrictions and operational fairness simultaneously in real-world hotel contexts, especially in developing regions such as Central Java. This study proposes an Integer Linear Programming (ILP) model to generate optimal shift schedules for hotel staff over a 31-day planning horizon. The model incorporates operational constraints, including one shift per day, gender-based restrictions (which prevent female staff from working night shifts), availability, minimum staffing levels, and fairness in workload distribution. Key parameters and binary decision variables were defined to ensure compliance with the hotel's specific requirements. Empirical data were collected from a hotel in Central Java involving 20 employees, and the model was implemented using Python with a Gurobi solver. The ILP model successfully generated optimal schedules in under 10 seconds, significantly outperforming the manual method, which required over 4 hours. While the manual schedule resulted in an imbalance where some employees worked over 27 days and others only 22, the ILP approach enforced a strict maximum of 26 working days for all staff. Furthermore, the fairness index (FI) improved from 19.2% in the manual method to 0% in the ILP-generated schedule, indicating complete equity in workload allocation. The proposed ILP model demonstrates its effectiveness in improving scheduling fairness, operational efficiency, and compliance with labour policies. This work not only addresses a critical research gap in hospitality scheduling practices in Indonesia but also offers a replicable framework for other labour-intensive service sectors. Future research may explore multi-objective extensions incorporating employee preferences, satisfaction, and dynamic demand fluctuations.

Village websites currently generally only provide information in the form of an interface for users, such as village profiles, potential areas, population data, and current news. However, the majority are not yet equipped with Application Programming Interface (API) support that allows for flexible and automated data integration and exchange. This is a challenge when dynamic access is needed by third-party systems, such as public service platforms, mobile applications, or local government information systems, which require real-time and accurate synchronization of population data. The project aims to implement a RESTful API that can be accessed securely, efficiently, and easily understood by developers to retrieve villagers' data. The development of the system is carried out using the Agile method, which supports rapid iteration and periodic evaluation to ensure that each feature functions optimally according to the needs of users and field conditions. This Agile method is applied in several sprints that include the stages of needs planning, designing the API endpoint structure, coding, documentation, and testing of the integration and security of the system as a whole. The results of the implementation show that the API successfully retrieves data directly from the village database, and presents it in a JSON format that is compatible for use by both frontend and third-party systems. This API supports pagination features for efficient access to large amounts of data, and is equipped with Basic Authentication to keep data access secure from being abused. With this API, the village website not only becomes a static information medium, but also transforms into a digital service platform that is open for cross-system integration. This supports the development of a more modern, efficient, sustainable, and collaborative village information system in the future, so that public services can be significantly improved.

This community service activity addresses the growing need for adaptive education in the digital era by focusing on strengthening the character and competence of students in line with rapid technological developments. The Pancasila Student Profile, which serves as the foundation of the Merdeka Curriculum, outlines six core dimensions: faith and piety, global diversity, cooperation, independence, critical reasoning, and creativity. Among these, creativity, independence, and critical thinking are crucial for preparing students to become innovators and problem-solvers in the digital world. However, schools in developing regions often face limitations in implementing these dimensions due to lack of resources and digital literacy. This program was implemented at SMA Negeri 2 Sorong Regency with the objective of strengthening the Pancasila Student Profile by providing training in the use of Thunkable, a visual programming platform for creating drag-and-drop mobile applications. The activity used a Project-Based Learning (PjBL) approach, enabling students to actively engage in designing simple educational applications that align with their learning context. The method encouraged hands-on exploration, teamwork, critical analysis, and creative thinking. Throughout the training, students not only learned how to navigate the Thunkable platform but also developed functional mobile apps addressing real-life learning challenges. The outcomes of the program showed a marked improvement in students’ digital literacy, problem-solving ability, innovation, and collaboration. Furthermore, students began to view themselves not just as consumers of technology but as producers of meaningful digital solutions. This initiative demonstrates that integrating digital technology with project-based learning can effectively support the implementation of the Pancasila Student Profile, even in remote or underdeveloped areas. It provides evidence that with the right approach and tools, students can be empowered to become digitally literate, creative, and socially responsible individuals who are ready to act as agents of change in the 21st century.