As the demands of educational world, which emphasizes the importance of problem-solving skills, social studies learning needs to be optimized to equip students with relevant skills for overcoming challenges in society. This study aims to design and develop teaching materials that apply self-directed learning, and also to evaluate the effectiveness of the implementation of these teaching materials in the context of social studies learning. The form of teaching materials in this study consist of a Student Book and a Teacher Book designed using an approach that emphasizes the development of students’ independence in the learning process. By producing a product that aligns with students’ needs, Research and Development (R&D) employs in this study. In the process of developing teaching materials, media expert and subject matter expert are involved to ensure the quality and success of the products. The effectiveness of the learning materials was tested through an experiment two seventh-grade classes at SMP Negeri 3 Ungaran. This study demonstrates that teaching materials applying self-directed learning can enhance students’ problem-solving skills. This finding is supported by statistical tests confirming the effectiveness of these teaching materials in achieving learning objectives.

The implementation of health information systems such as SIMKES (Sistem Informasi Manajemen Kesehatan) plays a crucial role in enhancing administrative efficiency and service delivery in primary healthcare centers. However, user satisfaction remains a key indicator of system effectiveness, especially in outpatient service units. This study aims to evaluate the satisfaction level of health personnel toward the implementation of SIMKES at the outpatient unit of Teguhan Health Center, Ngawi, Indonesia. Employing a descriptive quantitative method, this research involved a census of 17 respondents using a validated questionnaire based on the End-User Computing Satisfaction (EUCS) model, which comprises five dimensions: content, accuracy, format, ease of use, and timeliness. The data were analyzed using frequency distribution and mean scoring to categorize satisfaction levels. Results showed that the overall satisfaction score was 73.58, indicating that users were generally satisfied with the system. All five EUCS dimensions were categorized as satisfactory, with the highest rating in the format dimension and the lowest in timeliness. Despite the overall positive assessment, users reported issues related to system speed, technical bugs, and limited guidance for system navigation. The findings suggest that while SIMKES supports outpatient service delivery effectively, improvements are needed in system responsiveness and user support to enhance satisfaction and usability. This study contributes to the ongoing evaluation and development of health information systems in resource-limited primary care settings.

Public service advertisement (PSA) is one of the mass communication strategies used to convey social messages to the public. The purpose of this study was to analyze the influence of PSA on changes in people's social behavior, especially in environmental and health issues. The results of the study showed that PSA has a significant influence on increasing awareness and changing people's behavior, especially in terms of disposing of waste in its place and reducing the use of single-use plastic.

Permintaan material tubing di sektor minyak dan gas adalah elemen penting yang secara langsung berpengaruh pada kelancaran proses produksi. Tubing berfungsi sebagai saluran utama untuk mengalirkan fluida dari reservoir ke permukaan, sehingga keterlambatan dalam mendapatkan komponen ini bisa mengganggu proses pengeboran dan produksi. Salah satu kendala utama dalam pengelolaan rantai pasok adalah ketidakpastian dalam fluktuasi permintaan material, terutama dalam kondisi operasional yang berubah-ubah seperti yang dialami oleh PT Pertamina EP Asset-1 Field Jambi. Oleh karena itu, diperlukan metode peramalan yang dapat secara tepat memperkirakan permintaan di masa mendatang untuk mendukung keputusan dalam pengadaan dan pengelolaan stok. Studi ini bertujuan untuk menganalisis dan meramalkan permintaan material tubing dengan menggunakan metode Single Exponential Smoothing (SES), yang dikenal efektif untuk data yang tidak memiliki tren dan tidak musiman. Data yang dianalisis adalah permintaan tubing dari tahun 2015 hingga 2023. Dua nilai smoothing (dan ) diuji untuk menilai akurasi model dengan menggunakan indikator Mean Absolute Deviation (MAD), Mean Squared Error (MSE), dan Mean Absolute Percentage Error (MAPE). Hasil penelitian menunjukkan bahwa nilai  menghasilkan tingkat akurasi yang superior dengan MAD sebesar 479,55, MSE sebesar 614. 854,49 dan MAPE sebesar 16,8%. Temuan tersebut menggambarkan bahwa metode SES dapat berfungsi sebagai alat yang efektif untuk mendukung efisiensi pengadaan material, pengendalian persediaan, serta pengambilan keputusan strategis dalam sistem logistik perusahaan.

The objectives of this study are: (1) To analyze the extent to which the effectiveness of online business contributes to increasing sales turnover, and to analyze the factors that influence the success of online business strategies in increasing company profits. (2) To optimize market reach through appropriate digital marketing strategies. (3) To create added value or unique products to compete in the market. (4) Increase sales through a variety of products that suit market needs.The type of research that the author uses in this study is field research where to obtain accurate data, the author comes directly to the research location, namely the Zareen kebaya rental shop, Jalan Poros Kabo, Swarga Bara housing complex, extension block I no. 2, North Sangatta. The informants in this study were the shop owner and employees of the Zareen kebaya rental shop. In data collection, the researcher used interview, observation, documentation techniques and the data obtained, collected and processed descriptively qualitatively.Based on the results of the study, it can be concluded that online promotion at zareen kebaya rental is effective in increasing turnover through social media strategies, attractive promotions through video and photo content, customer testimonials, and responsive services that build loyalty. This method has been running well even though there are still obstacles. The obstacles experienced by the store are up and down sales, namely, monitoring demand patterns through social media, working with suppliers to increase stock, providing collections that can be worn at many events, and adjusting collections based on market trends. This strategy allows the store to continue to meet customer needs and increase sales.

This study evaluates the implementation of Behavior Based Safety (BBS) in improving occupational safety compliance at PT Wichindo Pratama, a heavy equipment manufacturing company with high work risks. The topic was chosen due to frequent violations of safety procedures, such as the improper use of Personal Protective Equipment (PPE) and neglect of Standard Operating Procedures (SOP), which increase the risk of accidents. A qualitative method was used through direct observation, in-depth interviews with 12 shift workers, and field assessments of safety facilities. The findings show that although the company has an Occupational Health and Safety (OHS) management system, non-compliance still occurs. Issues include incomplete PPE usage, disorganized work tools, and unsafe rest habits. Observations revealed potential hazards such as physical (noise), chemical (oil exposure), ergonomic (awkward postures), mechanical (machine use without full PPE), biological, and psychological risks (stress from shift work). BBS is seen as a strategy to connect existing OHS policies with safe work behavior by focusing on mindset and daily habits. The implementation of BBS is expected to reduce accidents and support the creation of a safer, more sustainable workplace.

This study aims to examine the potential and challenges of utilizing Solar Power Plants (PLTS) in Medan City, which is geographically located near the equator and receives high exposure to sunlight throughout the year. The method used is a literature review with a narrative review approach that analyzes secondary data from various journals and relevant scientific articles. The results of the study show that Medan City has an average annual horizontal global solar radiation intensity of 463.61 W/m², with the potential for electrical power that can be generated from rooftop solar panels reaching 748.57 MW (monocrystalline), 598.85 MW (polycrystalline), and 299.43 MW (thin film). This potential is comparable to the capacity of large-scale power plants. The use of PLTS contributes to reducing carbon emissions, increasing energy security, creating jobs, and developing the local economy. However, challenges such as high installation costs, limited suitability of roof structures, and low public awareness are still major obstacles in the implementation of this technology. Therefore, synergy is needed between government policies, public education, and technological innovation to optimize the use of solar energy in urban areas such as Medan.

Malaria is an infectious disease caused by Plasmodium parasites and transmitted through the bites of female Anopheles mosquitoes. It remains a serious public health issue in various endemic regions, particularly in developing countries. This study aims to identify the factors associated with malaria incidence and evaluate the effectiveness of prevention and control programs that have been implemented. A quantitative approach with a descriptive correlational research design was used, involving secondary data from the Health Office reports and primary data collected through field surveys in the endemic area of PT. Tandan Sawita Papua, Keerom Regency. The results showed that malaria incidence is associated with the use of mosquito nets and the use of mosquito repellents. The study concludes that an integrated approach to malaria control is essential, including community education, environmental improvements, and sustainable health policy support.

This study aims to compare two main theories in modern cosmology, namely the Big Bang Theory and the Steady State Theory, using a descriptive cosmographic approach. This study is motivated by the lack of deep understanding as well as the limited Indonesian literature discussing the fundamental differences between the two theories. By employing a qualitative method through literature review, this research examines the characteristics, advantages, and limitations of each theory based on the latest scientific evidence and cosmographic perspectives. The analysis results show that the Big Bang Theory has strong support from observational evidence, such as cosmic microwave background radiation (CMB), galaxy redshift, and the distribution of light elements, which reinforces the narrative of the expansion and evolution of the universe. In contrast, the Steady State Theory is considered less relevant due to the absence of observational evidence for the creation of new matter and its inability to explain structure and the dynamics of the universe that are currently observed.

This study uses a qualitative method to describe the infestation of Oryctes rhinoceros beetles in oil palm plantations and its impact on crop productivity. This pest poses a major threat to oil palm cultivation due to its ability to damage the growing points of both young and mature plants, resulting in a significant decline in yield. The study was conducted through field observations and in-depth interviews with farmers and field technicians at an oil palm plantation in Sumatra. The findings reveal that Oryctes infestations are more prevalent in plantations with poor sanitation and limited implementation of regular biological control systems. Farmers predominantly rely on mechanical and chemical control methods, which have proven to be less effective due to the lack of coordinated and sustainable application. Therefore, an ecologically-based integrated pest management strategy is needed, combining biological control, cultural practices, and farmer education to effectively suppress pest populations and ensure the sustainability of oil palm production.