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The rapid growth of digital marketplaces has fundamentally transformed consumer decision-making processes by intensifying price transparency, product comparability, and information exposure. In highly competitive marketplace environments, consumers are frequently confronted with numerous product alternatives and dynamic pricing structures, which shape how they evaluate options and ultimately decide to purchase. This study examines the effects of product variety and price perception on consumers’ purchase decisions in the context of ROSCA tumbler products sold on the Shopee marketplace. Using a quantitative explanatory approach, this research employs a survey-based design to analyze the relationships among variables and to estimate their relative effects through multiple linear regression analysis. Data were collected from 100 respondents who had previously purchased ROSCA tumblers on Shopee, selected using purposive sampling based on predefined criteria. The research instrument consisted of 15 Likert-scale items measuring product variety, price perception, and purchase decision. Data analysis included descriptive statistics, instrument validity and reliability testing, regression assumption diagnostics, and hypothesis testing using both partial (t-test) and simultaneous (F-test) procedures. The findings reveal that product variety has a positive and significant effect on purchase decisions, indicating that consumers are more likely to finalize purchases when they perceive product options as sufficiently diverse, relevant, and comparable. Price perception also exerts a positive and significant influence and demonstrates a stronger relative effect compared to product variety. This result underscores the central role of perceived price fairness, competitiveness, and value-for-money in shaping purchase decisions within transparent and highly competitive marketplace settings. Simultaneously, product variety and price perception explain a substantial proportion of variance in purchase decisions, highlighting their combined importance as key marketing stimuli. These findings contribute to the literature on digital consumer behavior by providing empirical evidence from a specific marketplace–product context and offer practical implications for sellers and brand managers in optimizing assortment design and pricing strategies to enhance conversion rates in online marketplaces

Business competition in the culinary sector continues to increase along with changes in people's consumption patterns towards ready-to-eat food. One product that is quite popular is fried dim sum, which is known for its variety of flavors and relatively affordable prices. In this competitive environment, understanding how consumers perceive product price and quality is crucial for businesses to maintain and increase customer interest in purchasing goods. Consumer perceptions of product price and quality when they choose fried dim sum are the subject of this study. Informants were selected purposively in this study, which used a qualitative and descriptive approach, namely consumers who have purchased and consumed fried dim sum products. Data collection methods included comprehensive interviews, direct observation, and supporting documentation. The collected data were analyzed using an interactive analysis model developed by Miles and Huberman through steps such as data reduction, data presentation, and discovery. The results show that consumers view price as an indicator related to the affordability and suitability of the product value. Price is considered acceptable if it is commensurate with perceived quality. In addition, product quality, including taste, texture, cleanliness, and packaging, is a primary factor considered before making a purchase. Positive perceptions of product quality increase customer trust and encourage repeat purchases. This study concluded that customer perceptions or opinions about price and product quality influence fried dim sum purchasing decisions. Therefore, culinary businesses need to prioritize proportional pricing and maintain consistent product quality to enhance business competitiveness.

This study aims to improve the learning outcomes of fourth-grade students in science through the application of an experimental learning model on the material of changes in the state of matter. The study used a Classroom Action Research (CAR) approach with the Kemmis and McTaggart model which includes the stages of planning, implementation of actions, observation, and reflection. The subjects of the study were 20 fourth-grade students of SDN Daan Mogot 1. The study was conducted in two cycles. Data collection techniques included learning outcome tests, observation of teacher and student activities, and documentation. Data analysis was carried out quantitatively by calculating the average value and percentage of learning completion, and qualitatively through descriptive analysis of the observation results. The results showed that the application of the experimental method was able to improve the quality of the learning process and student learning outcomes. Teacher activity increased from the sufficient category in cycle I to very good in cycle II, while student activity increased from the good category to very good. Increased student activity in observing, discussing, recording results, and drawing conclusions from experiments had a positive impact on understanding the concept of changes in the state of matter. Student learning completion also increased although not all of them reached the classical standard of 80%. Thus, the experimental method is effective in improving the activeness, quality of the learning process, and the science learning outcomes of fourth-grade students. Although material reinforcement and a variety of learning strategies are still needed to optimize learning outcomes.

This community service activity was implemented at SDN 3 Tangkiling to cultivate an entrepreneurial mindset among elementary school students by integrating financial literacy and exploring creative professions. The program emphasized enhancing students' comprehension of fundamental financial principles through socialization activities and rudimentary buying and selling simulations using play money. The “Mini Shop” activity was implemented to facilitate students' learning about the value of money, the distinction between needs and wants, and the importance of saving. This activity was designed using an active and contextual learning approach, which aligns with the characteristics of elementary school students and the principles of the Merdeka Curriculum, emphasizing character building, independence, and creativity. Additionally, the exploration of creative professions was undertaken through the implementation of role-playing and interactive discussions, thereby introducing a variety of occupations and cultivating an interest in entrepreneurship from an early age. The outcomes of the activity indicated that students exhibited increased enthusiasm and comprehension of fundamental financial concepts and demonstrated an interest in elementary entrepreneurial activities. It is anticipated that this program will evolve into an inspirational learning model for instilling financial literacy and entrepreneurial spirit at the elementary school level.

This community service activity was implemented at SDN 3 Tangkiling to cultivate an entrepreneurial mindset among elementary school students by integrating financial literacy and exploring creative professions. The program emphasized enhancing students' comprehension of fundamental financial principles through socialization activities and rudimentary buying and selling simulations using play money. The “Mini Shop” activity was implemented to facilitate students' learning about the value of money, the distinction between needs and wants, and the importance of saving. This activity was designed using an active and contextual learning approach, which aligns with the characteristics of elementary school students and the principles of the Merdeka Curriculum, emphasizing character building, independence, and creativity. Additionally, the exploration of creative professions was undertaken through the implementation of role-playing and interactive discussions, thereby introducing a variety of occupations and cultivating an interest in entrepreneurship from an early age. The outcomes of the activity indicated that students exhibited increased enthusiasm and comprehension of fundamental financial concepts and demonstrated an interest in elementary entrepreneurial activities. It is anticipated that this program will evolve into an inspirational learning model for instilling financial literacy and entrepreneurial spirit at the elementary school level.

Extrinsic skin aging or photoaging occurs due to repeated and prolonged exposure to ultraviolet (UVA) and ultraviolet B (UVB). Photoaging prevention can be done, one of which is the use of sunscreen. This literature review aims to review the role of sunscreen in photoaging prevention using a variety of existing literature. Sunscreen plays an important role in preventing skin damage caused by sunlight, especially in preventing and repairing skin damage due to sun exposure (photoaging). The addition of antioxidants such as vitamin C, vitamin E, vitamin A, melatonin, polyphenols, Polypodium leucotomos (PLE) extract as well as enzymes such as photoliase and T4N5 has been shown to increase protection against UV, visible light, and infrared-A rays and help repair skin damage. The use of colored sunscreen is recommended for protection from visible light. In addition, education on how to use sunscreen properly, such as reapplying every two to three hours and selecting the appropriate SPF and PA, also plays a big role in maximizing the effectiveness of skin protection from photoaging.

This study aims to analyse the difficulties experienced by female students at Tunas Ilmu Islamic Junior High School in learning English. English is an important subject in the curriculum, but some students still show difficulties in understanding and using the language effectively. This study uses a  qualitative descriptive method with observation, interviews and a questionnaire given to students. The initial results of the essay questionnaire show that 50% of students say they like English lessons, while the other 50% experience difficulties in learning. Meanwhile, the results of the multiple-choice questionnaire showed that students experienced three difficulties, namely difficulty reading sentences, understanding vocabulary, and understanding grammatical concepts. Learning difficulties are a problem that prevents students from following lessons as well as other students in general. Learning difficulties are commonly experienced by students. The results of the study show that the main difficulties students face are in speaking and listening skills, which are caused by a lack of vocabulary, low self-confidence, and limited exposure to English outside the classroom. Another contributing factor is the lack of variety in teaching methods. Therefore, this study is expected to serve as a basis for teachers to design more effective learning strategies that are tailored to the needs of students.

This study aims to analyze the opportunities, threats, strengths, and weaknesses of Arch Barbershop, a modern barbershop in Maumere City. The study was conducted using a descriptive approach through observation of the business environment, competitor analysis, and identification of local consumer preferences. The analysis shows that Arch Barbershop has promising opportunities due to the increasing trend of grooming among teenagers and young adults, and the lack of barbershops offering modern and consistent service concepts in the area. However, this business also faces threats in the form of competition from new barbershops, rapidly changing consumer preferences, and dependence on barber skills as the spearhead of service quality. Furthermore, internal weaknesses such as limited space, inflexible operating hours, and a less than optimal variety of services pose challenges to business development. By understanding these opportunities, threats, strengths, and weaknesses, Arch Barbershop can formulate a more effective development strategy to increase its competitiveness and business sustainability in Maumere City.

Halal certification is a primary requirement for Muslims when choosing food. This requirement is stated in Surah Al-Baqarah, verse 168 of the Quran, which commands Muslims to consume food that is halal and wholesome. Halal certification is assessed not only by the ingredients used but also by the entire production process, from processing and raw material use, transportation, to sales and consumption methods. In Indonesia, the development of halal products continues to grow rapidly in line with the large Muslim population. However, public understanding of halal certification, particularly for food and beverage products, remains relatively low. Based on this situation, this study examines the impact of halal certification on the marketing strategies of MSMEs in the food sector. This research seeks to answer two main questions: first, to what extent do MSMEs understand the importance of halal certification? and second, does the existence of halal certification influence consumer purchasing interest? The study used a library method, reviewing a variety of relevant literature, and an empirical approach to obtain data directly from the public.

This research presents the development of the Rembulan E Learning platform using Moodle as the primary Learning Management System for SMK Negeri 1 Pandeglang.The main objective is to provide a structured, accessible, and interactive digital learning environment that effectively supports teaching and learning activities, enhances student engagement, and facilitates teacher management of course materials. The study applies the Waterfall development model, which includes five stages requirement analysis, system design, implementation, testing, and deployment. Data collection methods involve observation of classroom practices, in depth interviews with teachers to identify pedagogical and technological needs, and comprehensive documentation review to ensure alignment with curriculum standards and user expectations. The resulting system integrates features such as digital classrooms, learning modules, assignments, discussion forums, quizzes, and student performance monitoring, offering a comprehensive digital learning experience. System testing was conducted using Black‑box Testing, complemented by limited user trials with teachers and students, which confirmed that the platform is functional, user friendly, and capable of supporting a variety of learning activities. This research contributes to the implementation of Moodle based LMS development in vocational schools, providing practical guidance for improving digital learning quality, promoting blended learning approaches, and facilitating sustainable adoption of educational technology in secondary education.

This study aimed to improve the speaking skills of sixth-grade students at SDN Negeri Kelapa Dua Wetan 01 Pagi in using the Simple Past Tense pattern (was/were) through the implementation of the Role Playing method. The research was conducted in two cycles involving 32 students as the subjects. The research method used was Classroom Action Research, consisting of the stages of planning, action implementation, observation, and reflection in each cycle. Data were collected through oral pre-tests and post-tests, as well as observations of students’ learning activities during the lessons. The results showed a significant improvement in students’ speaking skills. Their average score increased from 60.3 on the pre-test to 74.1 on the post-test. The percentage of students who achieved the Minimum Mastery Criteria also rose from 31% to 75%. The Role Playing method proved effective in enhancing students’ accuracy in using was/were, improving speaking fluency, and boosting self-confidence in oral communication. In conclusion, the application of the Role Playing method had a positive and significant impact on English learning outcomes among the sixth-grade students at SDN Negeri Kelapa Dua Wetan 01 Pagi. It is recommended that teachers continue to apply this method consistently, and that schools provide additional supporting facilities to optimize the learning process. For future studies, teachers and students are encouraged to expand the variety of role-play scenarios and include a control group to obtain a deeper and more comprehensive understanding of the effectiveness of the Role Playing method.

Processing plastic waste into fuel oil with pyrolysis technology. Research on plastic oil as an alternative fuel has been widely conducted. One of them is research on processing plastic bag waste into fuel oil with pyrolysis technology. In this study, a set of pyrolysis equipment was made by Lecturers and Students of UMNU Kebumen. The plastic waste used in this study was 1 kg of plastic bag. Meanwhile, the pyrolysis process used a temperature of 250oC-300oC. The fuel oil produced in the pyrolysis process of this study was approximately 400 ml. The average density of fuel oil from plastic bag waste was 0.733 gr/ml. The results of this density calculation are in the possibility of the density of gasoline, namely 0.710 gr/ml to 0.770 gr/ml. This pyrolysis process shows great potential for converting plastic waste into an environmentally friendly alternative energy source. Furthermore, the efficiency of this pyrolysis technology can be improved by adjusting the temperature and processing time, as well as by selecting a wider variety of plastic types. This technology has the potential to be applied more widely in plastic waste management within the community as a solution to reduce environmental pollution while generating renewable energy.

The use of artificial intelligence technology in elementary education is becoming increasingly relevant as teachers demand to develop creative and efficient teaching materials. Problems faced by fifth-grade elementary school teachers include limited time, a variety of ideas, and reliance on conventional methods in developing teaching materials, resulting in suboptimal learning creativity. This study aims to describe the use of ChatGPT by fifth-grade elementary school teachers in developing creative teaching materials and to identify the benefits and constraints of its use in the learning process. The research method used is a descriptive qualitative approach with data collection techniques through literature studies and online questionnaires based on Google Forms. The research respondents were fifth-grade elementary school teachers who were familiar with and used ChatGPT in lesson planning. The data obtained were analyzed using qualitative descriptive analysis techniques through the stages of data reduction, data presentation, and drawing conclusions. The results of the study are expected to provide a comprehensive picture of the role of ChatGPT as a digital assistant for teachers in increasing the efficiency and creativity of teaching material development in elementary schools.

This research focused on improving fine motor development in early childhood through creative learning activities that utilize recycled materials, designed and implemented using the ADDIE instructional model. The study involved children from class B2 at TK Prawidya Darma and was conducted systematically through five stages, namely analysis, design, development, implementation, and evaluation. Throughout the learning process, children were engaged in a variety of hands-on craft activities, including cutting, folding, gluing, and assembling recycled objects, which were intentionally structured to train hand–eye coordination, finger flexibility, and concentration. The results demonstrate that learning activities based on recycled materials offer rich and meaningful experiences for young learners. Children showed noticeable improvements in accuracy, independence, and creative expression while completing tasks. In addition, the use of recycled materials helped cultivate environmental awareness from an early age, as children learned the value of reusing everyday objects. The classroom atmosphere became more interactive and enjoyable, with students actively participating and showing enthusiasm during the activities. Overall, the findings indicate that creative recycling-based activities are effective in supporting fine motor skill development through enjoyable, practical, and environmentally friendly learning experiences. This study concludes that integrating recycled materials into creative activities can be an innovative, sustainable, and pedagogically valuable approach for early childhood education programs.

This study analyzes customer attrition in barbershops through the application of the 4P marketing mix, which includes Product, Price, Place, and Promotion. The research was conducted using a questionnaire distributed to 30 barbershop customers, which aimed to assess their level of satisfaction regarding each element of the marketing mix. The findings revealed that while customers were generally satisfied with the quality of the haircuts and the cleanliness of the tools, there was an important demand for improvement in the quality and variety of additional products offered. The pricing strategy was considered affordable by most customers; however, some expressed dissatisfaction, indicating the need for better communication regarding the value of the services provided. Demographic analysis showed that the majority of respondents were young adults aged 18-25, highlighting a specific target market for barbershops. Overall, this study emphasizes the importance of effectively implementing the marketing mix to improve customer retention and satisfaction in the barbershop industry.

This study aims to identify and describe the teaching process of Social Studies (IPS) in third-grade elementary school through direct observation. The method used involved an observation sheet designed in accordance with the research objectives to collect information on teacher and student activities, the teaching approach applied, and the use of teaching materials. The research findings revealed that although students were less actively involved, the lecture technique was still the main method in teaching Social Studies in third-grade elementary school. However, the practice of interactive instructional strategies, such as group discussions, the effective use of suitable instructional media is believed to enhance learners’ participation and foster greater motivation in the learning process. Furthermore, a harmonious interaction between educators and students also plays a role in establishing a supportive and comfortable learning atmosphere. The main obstacles include limited teaching materials and limited learning time. This study concludes that teaching Social Studies at the elementary school level needs to utilize a variety of interesting techniques and teaching materials to increase learning efficiency and foster student interest. These results provide useful empirical data as a basis for evaluating and improving Social Studies teaching in third-grade elementary school, so that it is more appropriate to the characteristics and needs of students.

In an increasingly competitive business world with ever-increasing customer demands for the quality of services and goods, customer satisfaction and loyalty have emerged as crucial issues in today's marketing management. Under such conditions, business entities must identify the key elements that shape satisfaction and how these contribute to building customer loyalty. This paper aims to examine the nature of study results on the determinants of satisfaction and loyalty through an evaluation of several recent empirical studies. Two key questions are addressed: which elements most strongly influence customer satisfaction, and what is the intermediary function of satisfaction in explaining the relationship between marketing variables such as service quality, cost, brand image, and trust with customer loyalty. The technique employed is a qualitative literature review through a search of articles using Google Scholar and Publish or Perish (PoP). Key terms used include customer satisfaction, customer loyalty, service quality, and trust. Of the 50 articles found in the initial phase, 15 met the inclusion standards and were thoroughly reviewed. The evaluation findings reveal three dominant patterns: service and product quality are the most stable factors driving satisfaction; cost and brand image serve as supporting factors; and trust acts as an important intermediary variable. This evaluation confirms that customer satisfaction is a key component in strengthening loyalty. Future studies are recommended to expand the scope of business sectors, use a more comprehensive structural framework, and utilize a wider variety of methodological techniques.

Changes in the lifestyles of the younger generation in Padang City have significantly contributed to the growth of the culinary and entertainment sectors, especially in services for birthday celebrations and small banquets presented in aesthetic and personalized packages. In this highly competitive culinary business, a strong branding strategy is essential for building a recognizable brand image and attracting consumers. Improving product quality and quantity, diversifying offerings, and providing a wide variety of products are critical for creating added value and expanding market share. Equally important, effective promotion enables companies to communicate with consumers, influence purchasing decisions, and strengthen brand loyalty. The general equilibrium concept offers a framework to understand how interconnected markets respond to changes in supply, demand, and consumer preferences, highlighting the need for businesses to continuously evaluate and adapt their strategies. This study emphasizes that success in Padang City’s bakery and culinary service industry depends on the integration of branding strategies, ongoing product development, and targeted promotional efforts, ensuring competitiveness, customer satisfaction, and sustainable business growth.

The problems in rice fields are complex and varied, depending on geographic location, rice variety, and growing season. Pests often cause serious economic losses. The Solar Sonic Repeller is an innovative portable pest control device designed to address pest problems by utilizing renewable energy, specifically solar energy. This product aims to offer an environmentally friendly and efficient solution. It works by emitting ultrasonic sound waves with a frequency of 30,000–40,000 Hz. The device's advantages lie in its portability and energy independence, thanks to the use of a charging module powered by an integrated photovoltaic (PV) panel with automatic battery charging during the day. The first test measured the output frequency using an oscilloscope to verify that the oscillator circuit produced waves at the specified frequency. The second test measured the device's effectiveness by examining the pest response to the device at various distances. This test was effective within a maximum radius of approximately 14 m from the center point, covering a rice field area of ​​250 m2.

Barru Regency tourism has a variety of tourist attractions, but information related to the location and potential of tourism has not been digitally integrated, making it difficult for tourists and the government to access data. This study aims to design and build a web-based Geographic Information System (GIS) that can map the location of tourist attractions in Barru Regency interactively, easily accessible, and equipped with supporting information in the form of descriptions, types of tourism, photos, and travel routes. The research method used is Research and Development (R&D) with the stages of tourist attraction surveys, interface design, feature development, and system testing. The results of the study are in the form of a website "Web-Based Geographic Information System for Mapping Tourist Attractions in Barru Regency" which is able to present tourist information systematically and easily understood. The conclusion of this study shows that the developed system can be a supporting medium in disseminating tourism information, helping tourists find tourist locations, and supporting the local government in managing and developing the tourism sector based on spatial data. This application also has the potential to be an educational and promotional tool to increase tourist visits to Barru Regency