The purpose of this study is to find out the difficulties experienced by students in solving mathematical problems, especially in working on or solving problems in the two-variable linear equation system material and to find out the causes of difficulties in the two-variable linear equation system material that has been carried out by grade VIII students. This type of research is qualitative research, namely by making observations, then the researcher gives several questions given to the research subject to work on. The test instrument used in this study is in the form of 2 questions, namely about the material of the two-variable linear equation system that has been validated. The subjects in this study were 19 students in class VIII A who participated in the research process, then the researcher selected 6 students as representatives of the research subjects. The instrument of this study is a written test by giving questions, then interviews. In the results of the research that have been observed along with the results of interviews used to determine the type of difficulty students in solving problems of the two-variable linear equation system, the test results show that students experience difficulties shown by making mistakes in working on the problem. The causes of students' difficulties that often occur are usually lack of concentration when working, difficulties when faced with different forms of problems, forgetting the material that has been taught.

When someone enters old age, symptoms such as senility or difficulty remembering new information often appear. This condition is known as dementia, a syndrome characterized by decreased cognitive function, behavioral changes, memory impairment, disorientation, and difficulty communicating and making decisions. This community service program aims to provide information and understanding about how to handle dementia that can be done at home. Activities are carried out through a counseling method consisting of a pre-test, education, and post-test, using leaflets and questionnaires containing questions to measure the level of understanding of participants. The results of the counseling showed an increase in participant knowledge, as seen from the comparison of the graph between the pre-test and post-test results. Education accompanied by brain gymnastics practices has been shown to have a positive impact on increasing participants' understanding of dementia and how to handle it. It is hoped that this counseling will continue to provide benefits to participants and can be applied in everyday life.

Social media is now a very important factor especially for startups, especially in the early stages of growth and brand recognition. The Importance of Social Media as a Marketing Strategy for Startups Students and prospective students in Malaysia. With the increasing use of digital platforms, utilizing social media has become a crucial strategy to reach target audiences, build brand awareness, and increase customer interaction. Seeks to enhance students’ comprehension of the strategic role of social media in effectively marketing their goods and services. Without a social media presence, a startup is missing out on a huge opportunity to grow, be recognized, and connect with potential customers. It is not just about digital existence, but also about competitiveness and business continuity.

Merokok merupakan salah satu kegiatan yang menyebabkan masalah kesehatan yang serius bagi masyarakat, karena dapat menyebabkan berbagai penyakit kronis dan ketergantungan. Selain itu, interaksi antara perokok dan non-perokok juga berisiko, karena paparan asap rokok dapat meningkatkan kemungkinan terjadinya penyakit pada individu yang tidak merokok. Untuk mengatasi permasalahan ini, maka perlu adanya pengontrol optimal yang efektif mampu menekan banyaknya perokok konvensional dan perokok elektrik. Metode lagrange digunakan untuk menyelesaikan permasalahan kontrol optimal. Edukasi terkait bahaya merokok diberikan kepada individu yang berpotensi merokok, agar mereka tidak menjadi perokok konvensional atau perokok elektrik. Kampanye difokuskan untuk meningkatkan kesadaran tentang manfaat berhenti merokok, dan ditujukan untuk perokok baik konvensional maupun elektrik. Hasil simulasi menunjukkan bahwa dengan melakukan kontrol melalui edukasi tentang bahaya merokok pasif dan kampanye berhenti merokok efektif dalam menurunkan jumlah perokok. Hal ini menunjukkan bahwa metode lagrange dapat menjadi pendekatan yang efektif dalam mengendalikan populasi perokok.

The purpose of this study was to determine the significant or insignificant influence of customer friendliness and availability of goods on purchasing decisions at the 5F clothing store in Batu Ajamu Market, Panai Hulu District. The study used quantitative methods and an associative causality approach. The data collection technique used was through observation and interviews. The sample in this study was 99 respondents or consumers. The sampling technique was simple random sampling. The data analysis technique used statistical techniques/SPSS by conducting validity and reliability tests, then for the questionnaire and multiple linear regression analysis with the T Test and F Test to prove the hypothesis. The results showed that there was a close and significant influence of customer friendliness on purchasing decisions, there was no close and significant influence of the availability of goods on purchasing decisions, the influence of customer friendliness and availability of goods was 35.6% and the remaining 64.4% was influenced by other factors and variables.

Horse racing is a tradition that is still ongoing and is favored by the people of Sumbawa Island in general, one of which is the Bima community who knows this tradition as a jara pacoa which is ridden by children aged 5 (five) to 12 (twelve years), known as the little jockey. These young jockeys have become part of the ongoing tradition since before the regulation regarding the provisions of the age of children regulated in the law and is still undergoing the same tradition when the laws and regulations have regulated the provisions of the age of children and their rights and obligations in Indonesia. The study was conducted by doctrinal method with literature study. Writing data uses secondary data derived from written legal material, books and scientific work, which then the authors complete with observations, and interview results. The right of the community to maintain the tradition and its cultural values is protected by the law, as well as the rights of children, in the tradition of jara Pacoa can be a forum for children to excel, not exploited if the government makes regulations and more serious regulations both for protection of children and the Pacuan arena.

This research aims to analyze the causes of the KM ship accident. Kirana I and the role of the Tanjung Emas Class I Harbormaster and Port Authority Office (KSOP) in improving shipping safety. Using a qualitative approach, data was collected through observation, interviews and documentation. The research results show that accidents are caused by human negligence, especially from ship crews who ignore safety procedures, even though the ship has met all safety certification requirements. Weather factors also contributed to the incident. KSOP Class I Tanjung Emas plays an important role in monitoring shipping safety through routine inspections and issuing Sailing Approval Letters (SPB). This research recommends increasing regular shipping safety training and outreach to ship crews and port officers, as well as strengthening coordination between agencies to create a better safety culture in the shipping environment.

This study aims to analyze the implementation of project-based learning through the creation of clipping envelope(KLIPOP) of norms in the Pancasila Education subject, as well as to evaluate its impact on improving the learning outcomes of fifth-grade students at SDN Kutorejo 1 Tuban. The background of this research is the low student achievement in Pancasila Education, often caused by conventional, theoretical teaching methods that lack connection to students’ real-life experiences. The research method used is Classroom Action Research (CAR) with a descriptive quantitative approach. Data were collected through observation, interviews, documentation, and the results of pre-tests and post-tests. The findings show that project-based learning is effective in improving students’ learning outcomes. This is evidenced by the increase in the average test score from 74.8 (pre-test) to 91.3 (post-test). Students also demonstrated greater engagement, creativity, and collaboration in understanding the norms contained in Pancasila. By involving students in contextual activities, such as collecting information and creatively designing norm envelopes, learning becomes more meaningful and applicable. Therefore, this learning model can serve as a strategic alternative to enhance students’ understanding and academic performance in Pancasila Education at the elementary level.

Air quality in Western Java is highly dynamic and shaped by environmental changes influenced by intense human activities. Aerosols—tiny particulate matter that affects air quality, weather, and climate—can be quantified using Aerosol Optical Depth (AOD), which measures aerosol concentrations in the atmospheric column. This research uses spatial regression analysis to examine the spatial distribution of AOD from GEE’s platform (Google Earth Engine) and its relationship with rainfall and wind patterns during both the wet and dry seasons. The findings indicate that wind speed does not significantly impact AOD values, but wind direction does affect the distribution of rainfall and AOD, likely due to the monsoon system. During the wet season (December to March), high-intensity and widespread rainfall effectively cleanses the atmosphere of aerosols, leading to no significant effect on AOD (p-value > 0.05). In contrast, during the dry season, rainfall significantly influences AOD spatial patterns (p-value < 0.05). These results highlight the intricate interplay between meteorological factors and aerosol’s behavior, emphasizing the seasonal variability in their interactions.

This research seeks to examine the effect of service quality on revisit intention, with customer satisfaction acting as a mediating variable, at Adiksi Coffee in Bandar Lampung. The study employed a survey method using questionnaires, gathering responses from 160 individuals who had previously visited Adiksi Coffee. The data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) to assess the relationships among service quality, customer satisfaction, and revisit intention. The analysis utilized the SERVQUAL dimensions for measuring service quality, alongside performance, expenses and overall expectation dimensions for customer satisfaction, and the Theory of Planned Behavior (TPB) dimensions for revisit intention. The findings revealed that service quality significantly and positively influences customer satisfaction; service quality also directly and positively impacts revisit intention. Additionally, customer satisfaction was found to have a significant positive effect on revisit intention and served as a mediator in the relationship between service quality and revisit intention. This study highlights the critical role of service quality in shaping customer satisfaction and revisit intention within the coffee shop sector, particularly at Adiksi Coffee. These insights offer valuable practical implications for coffee shop operators aiming to enhance customer satisfaction and encourage repeat visits by focusing on service quality improvements.