This study aims to analyze the implications of business law on consumer protection in e-commerce transactions in Indonesia. The results of the study indicate that business law plays an important role in protecting consumers in e-commerce transactions. However, the effectiveness of existing laws and regulations is still questionable because there are still many cases of fraud and unfair business practices. Therefore, this study suggests the need for improvements to laws and regulations, increased consumer awareness, effective supervision, and cooperation between the government and business actors to improve consumer protection in e-commerce transactions in Indonesia.

Research aims to design and develop a boiler system for heating Marine Fuel Oil (MFO) 180 CST by integrating Internet of Things (IoT) technology to enhance efficiency and operational monitoring. The methods used include boiler system design, selection of types and materials according to international standards, and the implementation of an optimal combustion system. IoT sensors are strategically placed to monitor key parameters such as temperature, pressure, and fluid flow in real-time. The collected data is transmitted to a cloud platform, enabling remote monitoring and automated performance analysis through a web or mobile-based application.. The research results indicate that IoT integration in the boiler system improves fuel heating efficiency, optimizes energy consumption, and facilitates easier monitoring and process control. Testing includes pressure tests, combustion efficiency, steam capacity, and material durability, with real-time monitoring to support performance analysis and early problem detection. Operational data evaluation allows for design adjustments or system settings to further enhance energy efficiency. With this innovation, the boiler system can operate more optimally, support energy efficiency, and facilitate predictive maintenance for sustainable industrial operations. The implementation of IoT in this system is expected to improve safety, effectiveness, and automation in boiler management, making it a more reliable and modern solution.

This study aims to analyze the effectiveness of Drops app in improving Japanese vocabulary acquisition among beginners. Based on the theory of cognitivism, the study used a descriptive qualitative method with a sample of 21 subjects who answered 11 questions through a Google Form survey. Results showed that the use of Drops significantly increased the average vocabulary score by 43 % (from 28.5 to 40.7), which was influenced by the integration of gamification features and spaced repetition mechanism in the application. The majority of respondents (76 %) reported high satisfaction with ease of use, learning motivation, and effectiveness of visual illustrations, consistent with previous research on audiovisual and gamification-based mobile apps. However, about 24 % of respondents recorded medium to low scores on motivational aspects and interface appearance, indicating the need for UX/UI enhancements to expand adoption. Demographic statistics revealed the average age of respondents to be 18.38 years (Q1=17; median=18; Q3=20), confirming that teenagers and pre-adults are the main group of Drops users. The findings provide recommendations for both language education practitioners and app developers to optimize design and features to maximize vocabulary learning effectiveness.

In aviation, two important factors can affect passenger satisfaction: time efficiency in service, especially in the baggage claim process, and airline image. These two activities also apply to passengers at Halim Perdanakusuma International Airport. This study aims to determine whether there is an influence between the duration of baggage claim and airline image on passenger satisfaction, both partially and simultaneously. This study uses a quantitative approach to data collection. It distributes questionnaires to 105 Citilink Indonesia passengers and 105 Batik Air passengers who claim their baggage in the arrivals area. In addition, it uses baggage manifest data in the form of first baggage (fi-bag) and last baggage (la-bag) time data. The data is then analyzed using the t-test (partial test) and f-test (simultaneous test). The results of the study indicate that partially, the Baggage Claim Duration variable has a significant effect on the Passenger Satisfaction variable, both for Citilink Airlines (sig.=0.30) and Batik Air (sig.0.035). The results of the study indicate that partially, the Airline Image variable has a significant effect on the Passenger Satisfaction variable for both Citilink Airlines (sig.=0.000) and Batik Air (sig.=0.000). Furthermore, the Baggage Claim Duration and Airline Image variables simultaneously affect the Passenger Satisfaction variable, with a significance of 0.000 for both Citilink and Batik Air Airlines.

This study aims to examine the effect of liquidity, profitability, and solvability ratios on investment decisions while also investigating the moderating role of firm size in this relationship. The research focuses on manufacturing companies listed on the Indonesia Stock Exchange for 2019-2023, which are marked by significant economic disruptions, including the COVID-19 pandemic. A quantitative approach was employed, using panel data regression to test the proposed hypotheses. Financial ratios were measured using the current ratio, return on assets, and debt-to-equity ratio, while investment decisions were assessed using the price-earnings ratio. The natural logarithm of total assets measured firm size. The results reveal that liquidity and solvability significantly influence investment decisions, while profitability does not. Firm size was found to moderate the relationship between liquidity and solvability with investment decisions, but not the relationship involving profitability. These findings have practical implications for investors and corporate managers in formulating investment strategies and managing financial performance, highlighting the importance of considering firm size when evaluating the effectiveness of economic indicators. This research also contributes to the empirical literature on investment decision-making in the manufacturing sector.

PLN as an electricity provider that serves all regions in Indonesia certainly always wants to provide the best service to its consumers, including PT. PLN Persero UP3 Gresik. Along with the increase in consumers, the company continues to develop distribution lines, however, because the addition of more and more lines makes the distribution cables longer and the load becomes greater, resulting in voltage drops and power factors decreasing in several feeders, including in the feeder network. LOWAYU, causing poor power quality.This research aims to find and obtain the magnitude of the power flow which includes active power, reactive power, apparent power and the magnitude of the power losses (losses) contained in the LOWAYU feeder network, the magnitude of the voltage and voltage drop on each bus on the network. LOWAYU feeder using the backward-forward method. And determine the value of reactive power required for the capacitor on each bus that experiences a voltage drop. Then a comparison will be made between the results of manual calculations using the backward-forward method and the results of simulation data using ETAP Power Station 19.0.1 software.From this research, it can be seen that the safe limit for the voltage drop value is still below 5% or above 5%, so it is necessary to add capacitor banks to improve the power factor and reduce the voltage drop value on distribution network buses that experience voltage drops.

Anemia is a common health problem among adolescent girls, which can affect their growth and development. Thi study aims to identify factors that influence the occurrence of anemia in adolescent girls. Both biological and environmental factors contribute to anemia. The method used was a comprehensive literature review, by collecting data from various relevant sources including journals and research reports. The result emphasized the importance of knowledge about adolescent girls health, as well as lack of iron consumtion, irregular sleep patterns and long-duration or irregular menstruation, so there is a need for education n each village to reduce the risk of anemia in adolescent girls. The conclusion of this study shows that the impact of anemia  affects physical health, quality of life, productivity and social well-being. Addressing anemia should be a priority in public health policy.

This article discusses the linguistic structure of Indonesian with an emphasis on the importance of morphology as one of the main aspects in learning and understanding language. Morphology, as a branch of linguistics, studies the internal structure of words and the process of their formation through affixation, reduplication, and composition. This study aims to analyze the types of morphemes—including free, bound, derivational, and inflectional morphemes—and to understand the morphological process and grammatical classes in Indonesian systematically. Through this study, it is also explained how affixation (prefix, suffix, infix, and confix), reduplication in various forms, and compound word composition play a role in forming meaning. This study highlights the importance of morphology in language teaching, communication, and development, and emphasizes that understanding morphological structure will improve language skills accurately and effectively, both in formal and informal contexts, and strengthen the sense of familiarity and awareness of the richness of Indonesian.

This study was conducted because there are still many fifth grade elementary school students who still have difficulty in understanding the contents of the reading, especially when asked to think critically or evaluatively. They have not been able to assess or give opinions about the reading properly. In addition, their reading ability is still low. The purpose of this study was to determine students' ability to understand reading evaluatively. This study used a case study method with a qualitative approach. The researcher involved five fifth grade elementary school students as research subjects. The data for this study were obtained through observation, evaluative reading comprehension ability tests, and documentation. The results of this study indicate that fifth grade students still have low evaluative reading comprehension abilities. Students have not been able to answer questions or complete exercises related to the contents of the reading correctly, have difficulty assessing ideas or ideas conveyed by the author based on their experience and knowledge, cannot state reasons for choosing certain ideas or ideas, and have not been able to compare the main ideas in the text with personal experiences properly. Several factors that cause this low ability are students' difficulty in maintaining concentration while reading, lack of interest and motivation in reading activities, and support provided by the family environment.

In the learning process in Elementary Schools (SD), the use of audio media is one of the innovative approaches that can increase the efficiency and interactivity of learning. The purpose of this article is to thoroughly study the use of audio media as an interactive learning tool in SD. This review includes ways to implement it, the benefits obtained, and the problems and solutions that arise when implementing it. The discussion method is carried out by conducting literature research and analyzing learning practices applied in several elementary schools. Audio media, such as podcasts, educational songs, audiobooks, and sound recordings, can increase student engagement, strengthen their understanding of the material, and support auditory learning styles. In addition, this media can be used in various fields of education, especially English, Indonesian, and Religious Education. However, there are still several problems that hinder the use of audio media. These include limited facilities, lack of teacher instruction, and student readiness to listen actively. As a result, the right approach is needed. These strategies include creating interesting audio content, incorporating it into learning activities, and improving teachers' ability to utilize educational technology. Audio media can help elementary school students get a fun and meaningful learning experience if used in a targeted and creative way.