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.

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 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.

This study aims to analyze the efficiency and effectiveness of the use of mandatory spending in the management of regional expenditure in the education sector in 35 districts/cities in Central Java Province for the 2019–2022 fiscal year. Mandatory spending is an obligation to allocate at least 20% of the APBD for education, as regulated in national regulations. Efficiency is measured by the Data Envelope Analysis (DEA) method using an output-oriented approach and Variable Return to Scale (VRS) assumptions, where an area is said to be efficient if its efficiency score = 1. Meanwhile, effectiveness is assessed based on the comparison of output and outcomes, and is said to be effective when it reaches a percentage of 90–100%. The results show that there is a disparity between regions. Only Klaten Regency and Semarang City have shown perfect efficiency for four consecutive years. However, none of the areas achieved perfect effectiveness throughout the study period. The COVID-19 pandemic has also affected the dynamics of education budget realization, which has an impact on achieving efficiency and effectiveness. These findings provide strategic implications for local governments in developing education budget policies that are more optimal and oriented towards improving the quality of human resources.
 

This study aims to analyze the influence of Product Quality, Price, Sales Promotion, and Advertising on consumer purchasing decisions on the Bukalapak online store platform. This study used a quantitative approach with descriptive methods, aiming to illustrate the relationships between variables based on empirical data. Primary data were obtained by distributing questionnaires to 120 respondents who were active Bukalapak users in the West Medan District. The data analysis technique used was multiple linear regression with the aid of SPSS software to determine the effect of each independent variable on the dependent variable. The analysis results indicate that, partially, the variables Product Quality, Sales Promotion, and Advertising have a positive and significant influence on purchasing decisions. This means that the higher the product quality, the more effective the promotion, and the more attractive the advertisement, the greater the likelihood of consumers making a purchase. Conversely, the variable Price showed a negative and significant influence, indicating that inappropriate pricing can reduce purchase intention. Simultaneously, all four variables have a significant influence on purchasing decisions. The Adjusted R Square value of 70.4% indicates that this research model is able to explain 70.4% of the variation in purchasing decisions, while the dependent variable is influenced by factors outside the model. This study recommends that Bukalapak continue to improve product quality, develop competitive pricing strategies, strengthen promotions, and create creative advertising. Further research is recommended to consider additional variables such as product reviews, brand image, and service quality to enrich the analysis.

Based on data from the Central Statistics Agency (BPS) from 2021 to 2023, the crime rate in Indonesia increased by 345,510 cases. This increase indicates social problems, particularly in the economic sector. Factors such as high unemployment, high poverty rates, and low minimum wages are the main causes driving crime. When people's basic needs are not met, the potential for deviant behavior to meet their living needs tends to increase. This study aims to analyze the influence of unemployment, poverty, and the Provincial Minimum Wage (UMP) on crime rates in Indonesia, both partially and simultaneously. The study uses a quantitative approach with secondary data sources obtained from official BPS publications. The data used is panel data, namely a combination of time series (time span) and cross-section (across regions/provinces) data for the period 2021–2023. Data analysis was performed using a panel data regression model with a Fixed Effect Model (FEM) approach after undergoing the Hausman Test. The results show that partially, the three variables—unemployment, poverty, and the UMP—have a significant influence on crime rates. Simultaneous testing also showed that collectively, these three variables significantly influence the crime rate. Furthermore, the coefficient of determination (R²) test result of 93.5% indicates that unemployment, poverty, and the minimum wage (UMP) variables are able to explain most of the variation in crime rates in Indonesia during the study period, while the remaining 6.5% is influenced by other variables not included in the model. This finding emphasizes the importance of improving the economic conditions of the community through job creation, poverty alleviation, and minimum wage adjustments as preventative measures to reduce crime rates in Indonesia.

This study aims to evaluate the effectiveness of the use of Canva and Nearpod digital platforms in supporting the strengthening of students' character at the elementary school level. Character education is a fundamental aspect in the formation of students' personalities who have integrity, toughness, and adaptability to the development of the times. In the digital era, interactive learning media is an important means to instill character values in a more interesting and contextual way. The method used is Classroom Action Research (PTK) which is carried out in two cycles, with the research subjects consisting of teachers, class V students, and students' parents. The learning process is designed to blend character education content with the use of Canva as a creative visual medium, as well as Nearpod as an interactive presentation tool that allows students to be active through online quizzes, assignments, and reflections. The results of the study showed a marked increase in students' learning motivation, attitude of responsibility, discipline, cooperation in groups, and the ability to make decisions independently. Parental involvement in digital learning also supports the consistency of character strengthening at home. However, the study also noted several challenges, such as the limitations of technological devices, unstable internet networks, and variations in students' and parents' digital literacy abilities. Recommended solutions include intensive training for teachers in the use of digital media, improved support facilities in schools, as well as a collaborative approach between teachers and parents. Thus, the integrated use of Canva and Nearpod not only supports mastery of academic materials, but also significantly strengthens students' character values holistically. This study is expected to be a reference in the development of digital learning innovations oriented towards character education at the elementary level.