Indoor positioning technology plays an important role in improving efficiency and automating industrial processes such as warehouse management, production lines, and mobile robot navigation. However, existing RFID-based and odometry-only localization methods still suffer from limited accuracy, drift, and dependence on predefined infrastructure. To address these challenges, this work proposes a lightweight sensor fusion framework that combines wheel encoder data and phase-based RFID signals using an Extended Kalman Filter (EKF) for accurate indoor localization of mobile robots. The proposed method does not require prior knowledge of the tag map and enables convergence even when the robot starts outside the reader's range. Simulation results demonstrate that the fused method achieves an average positioning error of 5.4 cm and a final error of less than 8 cm. An ablation study comparing odometry-only, RFID-only, and fusion scenarios confirms the superiority of the integrated approach in terms of accuracy and robustness. The system is suitable for real-time implementation in cost-effective embedded platforms and has potential for deployment in smart warehouses and logistics environments.

Indoor positioning technology based on smartphones plays an important role in the current technological development context. Especially in applications such as warehouses, supermarkets, hospitals, or buildings. While the global positioning system (GNSS) is popular and effective outdoors, it has several limitations when operating in enclosed spaces, such as indoors, due to the complexity of these environments. Smartphones have many built-in sensors (such as light sensors, sound sensors, gyroscopes, accelerometers, and magnetic sensors) and support the connection of various types of wireless communication technologies such as Wi-Fi and Bluetooth. However, such sensors were not initially developed for positioning applications. This study addresses the positioning problem using the MUSIC technique in conjunction with the Time of Arrival (ToA) method. The effectiveness of the positioning solution is evaluated through the signal-to-noise ratio (SNR) index. The absolute error and squared error indices are evaluated through the cumulative distribution function (CDF) to indicate the effectiveness of the proposed solution. Additionally, we propose a Pedestrian Dead Reckoning method to determine a person's position in indoor environments continuously. Based on the segmentation of the moving process by turns, the direction measurements in each segment are processed using a Kalman filter, which is designed to enhance the results achieved by the system. We also discuss the challenges and some future research directions in the field of smartphone-based indoor positioning.

This study aims to describe elementary school teachers’ perceptions of the use of STEM-based instructional media as an effort to strengthen 21st-century skills. The research employed a descriptive qualitative approach with the subjects being elementary school teachers in the regions of Tasikmalaya City and Regency. The population included all elementary school teachers in both areas, with a purposive sample of 50 participants. The research instrument was a Likert-scale questionnaire developed based on three indicators of STEM literacy: (1) awareness of the role of STEM in modern society, (2) familiarity with basic STEM concepts, and (3) foundational fluency in STEM application. Data were collected using an online questionnaire via google forms, while the data analysis involved calculating the average score for each indicator. The results showed that for the first indicator, teachers in Tasikmalaya City had higher awareness (average score of 4.05) compared to those in the Regency (3.93). However, in the second and third indicators, teachers from the Regency scored higher, at 3.39 and 3.67 respectively, compared to city teachers who scored 3.30 and 3.59. These findings suggest that although urban teachers have stronger conceptual awareness, rural teachers demonstrate greater mastery in understanding and applying STEM practically in classroom learning. This difference is suspected to be influenced by contextual experience and more frequent implementation of hands-on learning approaches in the Regency.

The traditional Riau Malay beverage, Laksamana Mengamuk, is a cultural heritage asset facing existential challenges amidst modernization. This study explores its potential as an educational tool in urban public settings. The research method involved direct public socialization at the Car Free Day on Jenderal Sudirman Street, Pekanbaru, featuring outreach, a making-of demonstration, and product sampling. The enthusiastic and positive public response indicates that a direct educational approach combined with a sensory (taste) experience is highly effective for building emotional and cultural connections to local culinary heritage. These findings confirm that direct sensory engagement is an effective method for enhancing cultural awareness. Therefore, strengthening collaboration among stakeholders is recommended for the sustainable preservation of local culinary heritage within public spaces.

This research aims to evaluate the impact of traditional games on the development of children's social interaction skills, highlighting its relevance amidst the shift in children's interests from traditional to digital games and the ongoing challenges of conventional mathematics education. Through a comprehensive literature review approach, this article analyzes the effectiveness of traditional games such as congklak, cak bur, and engklek in supporting cognitive, motor, and socio-emotional development in early childhood. The research findings indicate that traditional games significantly enhance social interaction skills, as evidenced by the effectiveness of cak bur in improving social interaction among kindergarten students and the role of congklak in the socio-emotional development of young children.

This study aims to describe the effectiveness and efficiency of the management of School Operational Assistance (BOS) funds at SMAN 2 Sidrap. BOS funds are a government program aimed at supporting the financing of school operational needs at the elementary and secondary education levels. This program is expected to improve access and quality of education, but its implementation is still faced with various obstacles such as delays in disbursement of funds, lack of transparency, and a suboptimal reporting system. This study uses a qualitative descriptive approach, with data collection techniques through in-depth interviews, field observations, and documentation studies. Informants in this study consisted of the principal, treasurer, teachers, and BOS fund management staff. The results of the study indicate that in general the management of BOS funds at SMAN 2 Sidrap has been running quite effectively and efficiently. Effectiveness is reflected in the use of funds that contribute to improving the quality of educational services, such as the procurement of learning facilities and the implementation of extracurricular programs. Efficiency is seen in the use of funds that refer to the priority scale of school needs. However, obstacles are still found such as delays in disbursement of funds from the central government that impact the smooth implementation of school activities, and financial reporting that has not been fully documented systematically and periodically. This research provides an important overview of the real conditions of BOS fund management in schools and is expected to provide input for related parties in order to improve the education financial governance system to make it more transparent, accountable, and sustainable.

This research investigates the underlying factors that shape the interest of students from the 2024 cohort in enrolling in the Bachelor of Mechanical Engineering Education Program at the Faculty of Engineering, Universitas Negeri Padang. Utilizing a descriptive quantitative methodology, data were gathered through a structured, closed-ended questionnaire administered to the entire cohort, which consisted of 89 students. The analysis reveals that the overall level of student interest is categorized as high, with a notable percentage of 55%. Several key variables were identified as influential: (1) self-awareness factors encompassing physical capabilities, intellectual aptitude, intrinsic motivation, and innate talent were rated in the very high category at 56%; (2) familial influences such as the provision of information, emotional support, and parenting styles also ranked very high at 46%; (3) school-related elements including the accessibility of school information systems, teacher roles, peer dynamics, and hands on learning experiences were classified in the high category with 44%; and (4) social media engagement specifically the frequency of use and the quality of educational content was likewise in the high category, scoring 48%. These findings underscore the multifaceted nature of student decision-making, with self-awareness emerging as the most prominent determinant in shaping academic program choices. The study highlights the need for educational institutions to consider these interrelated dimensions when developing recruitment strategies and academic guidance frameworks.

Micro, Small, and Medium Enterprises (MSMEs) are one of the sectors that have an important role in supporting Indonesia's national economy. Its contribution is enormous to the Gross Domestic Product (GDP), job creation, and increased innovation, especially in the face of global economic challenges and social inequality. This research aims to examine in depth the role of MSMEs in encouraging Indonesia's economic growth and identify various challenges faced by this sector. The method used in this study is library research, by analyzing various sources of scientific literature, policy reports, and relevant empirical data related to the role of MSMEs. The results of the study show that MSMEs not only contribute to increasing national GDP, but also become the main driving force in providing jobs for the community, especially in rural and suburban areas. In addition, MSMEs are also an important means in the development of local innovation, especially in the use of simple technology that is in accordance with community conditions. However, MSMEs also face a number of serious challenges that can hinder their contribution to economic growth. These challenges include limited access to digital payment systems, low quality of human resources (HR), weak marketing networks, and limited capital and technology. Thus, to increase the role of MSMEs in national economic development, synergy is needed between the government, the private sector, and financial institutions in providing comprehensive and sustainable support. The support includes training on human resource capacity building, access to capital, digital transformation, and strengthening the business ecosystem. This research is expected to contribute to the development of policies that favor the empowerment of MSMEs in Indonesia.

This research was motivated by the problem of children's low ability to coordinate hand and vision movements, which directly impacts their activities and fine motor skills. This study aims to describe the activities of teachers and children and analyze the development of fine motor skills in group A students at Hidayatullah Kindergarten Barito Kuala. This study used a Classroom Action Research (CAR) approach with a qualitative design and was conducted over four meetings. The results showed a significant increase in teacher activities and the development of children's fine motor skills. Teacher activities that initially received a score of 18 in the fairly good category increased to a score of 32 in the very good category at the fourth meeting. Meanwhile, at the beginning of the intervention, only 7% of children were in the Very Well Developed (BSB) category. After the first intervention, the percentage of children in the BSB category increased to 27% or five children. A more significant increase occurred at the fourth meeting, with 14 children or 82% falling into the BSB category. The intervention used a project-based learning model combined with a demonstration method in stringing activities using natural materials. Based on the results obtained, it can be concluded that this model is effective in improving fine motor skills in early childhood. This combination of approaches encourages active child engagement and provides meaningful and contextual learning experiences, contributing to optimal fine motor development.
 

This study aims to analyze the influence of green advertising, green packaging, and green product on the purchase decision of The Body Shop products, with customer satisfaction as an intervening variable. The background of this research is based on increasing consumer awareness of environmental issues, which drives changes in consumer preferences towards environmentally friendly products. Green marketing strategies are important in shaping a positive brand image and influencing consumer purchasing behavior. This study uses a quantitative approach with a path analysis method processed using SPSS software. The respondents in this study amounted to 100 students from the Faculty of Economics and Business, Wijaya Kusuma University Surabaya who had bought The Body Shop products. The results of the analysis show that green advertising, green packaging, and green products have a significant effect on customer satisfaction. Furthermore, green advertising and green products have also been shown to have a direct influence on consumer purchase decisions, while green packaging does not show a significant influence on direct purchase decisions. In addition, customer satisfaction has been shown to play a significant mediating variable in the relationship between green marketing variables and purchase decisions. These findings confirm that the implementation of green marketing strategies not only has a positive impact on the company's image and social responsibility, but also plays an important role in increasing customer satisfaction and encouraging consumers to make purchasing decisions. Therefore, companies are advised to continue to develop and integrate eco-friendly elements in their marketing strategies to increase competitiveness and consumer loyalty. This research also makes a theoretical contribution to the development of consumer behavior studies related to sustainable marketing, especially among the younger generation.