This study aims to examine the practice of elopement (kawin lari) and its legal consequences from the perspective of Batak Angkola customary law, as well as its relation to Law Number 1 of 1974 on Marriage. The research was conducted in Sibangkua Village, Angkola Barat District, South Tapanuli Regency. The method used is an empirical legal approach, with data collected through observation and interviews with traditional leaders, religious figures, village officials, and individuals involved in elopement. The findings reveal that elopement frequently occurs in Batak Angkola society, mainly due to high dowry demands, disapproval of arranged partners, or violations of social and religious norms. The resolution process is carried out through customary stages such as mandokon ulang agoan, marsapa adat, and patibal sere. Although the national marriage law does not explicitly regulate elopement, it is recognized within Batak Angkola custom and has a structured resolution mechanism. Nevertheless, socially, elopement is often viewed negatively and may damage the family’s honor.

This study aims to optimize the implementation of the K-Nearest Neighbors (K-NN) algorithm for medical image classification by focusing on selecting the optimal KKK parameter and applying dimensionality reduction techniques to improve accuracy and efficiency. The data used was sourced from public medical image repositories such as The Cancer Imaging Archive (TCIA) and Medical Image Analysis datasets, covering various diseases, including brain tumors, lung cancer, and kidney lesions. The research process involves data collection, data preprocessing, dimensionality reduction using Principal Component Analysis (PCA), applying the K-NN algorithm with Euclidean, Minkowski, and Cosine distance metrics, and performance evaluation using accuracy, precision, recall, and F1-score. Experimental results demonstrate that K=5with the Euclidean distance metric provides the best performance, achieving an accuracy of 90%. Additionally, PCA effectively reduces computational time by 30% without significantly compromising accuracy. This study proves that K-NN is an effective method for medical image classification. However, further research is needed to integrate K-NN with deep learning models to enhance performance and feature extraction capabilities.

Sinar Bhakti Village, located in Ogan Komering Ulu Regency, holds significant potential in rubber plantation management. However, suboptimal rubber tapping techniques often pose a major challenge for beginner farmers, resulting in low production yields and damage to rubber trees. This community service program aims to empower beginner farmers through training on optimal rubber tapping techniques. The method used was a participatory approach with hands-on field training. The training was conducted on Saturday, January 19, 2025, and included the introduction of tapping tools, proper tapping techniques, and post-tapping tree care. The activity involved beginner farmers in Sinar Bhakti Village. The results indicate that the training successfully enhanced participants' understanding of proper rubber tapping techniques. All participants effectively applied the techniques during field simulations. Additionally, participants demonstrated increased confidence in managing rubber plantations independently. This program positively impacted not only rubber productivity but also the economic sustainability of the village community.

The construction of the pier at Pasir Kuning Beach, Tempilang, West Bangka Regency, Bangka Belitung Islands, aims to improve access and facilities for visitors. The beach is famous for its yellow sand beauty and distinctive cultural attractions, such as the tradition of the Ketupat War. The planned pier will support tourism activities by providing facilities for tourist boats and improving safety in shipping. This study evaluates the technical and topographic aspects needed to determine the most appropriate location of the pier. By taking into account factors such as tides, waves, and currents, the optimal location for the construction of the pier was successfully identified. This study uses a quantitative descriptive method with secondary data collection and financial analysis involving parameters such as Net Present Value (NPV), Internal Rate of Return (IRR), Benefit Cost Ratio (BCR), and Payback Period (PP). The results of the analysis show that this project is financially feasible, with an NPV of IDR 2,664,366,232.32 (10% discount) and IDR 1,583,944,003.86 (15% discount), IRR of 13.1%, BCR of 1.4, and a payback time of 2.8 years. In addition, the project is expected to boost local economic growth through increasing the number of tourists and promoting local culture. Overall, this initiative not only focuses on the development of physical infrastructure but also on the development of tourism potential and the preservation of local culture, thus providing long-term benefits to the surrounding community.
 

The low students' avarage number of mathematical critical thinking skills in class VIII SMPN 1 Candung ranged from 82.14% to 89.29%. To overcome this problem, researchers tried to conduct research by applying the EXO OLO TASK learning model in learning mathematics. This type of research is pre-experimental research with the research design The Static Group Comparison Design. The population in this study were all students of class VIII SMPN 1 Cawang. The samples in this study were students of class VIII.2 as the experimental class and VIII.1 as the control class. The instrument in this study was a test of students' mathematical critical thinking skills in the form of an essay test. The results of the study using the t-test obtained t_count=1.92 > t_table=1.674, so H0 was rejected. For Minitab software testing at a significant level of a = 0.05, Pvalue = 0.002 is obtained, meaning Pvalue <a, so H0 is also rejected. So it can be concluded that students' mathematical critical thinking skills using the EXO OLO TASK learning model are better than students' mathematical critical thinking abilities using conventional learning in class VIII SMPN 1 Cdungung.

Maraknya klub motor di Indonesia mengakibatkan banyak pula kegiatan dalam klub tersebut. Kegiatan tersebut yaitu seringnya berkendara dengan intensitas yang lama yang melibatkan aktivitas pergelangan tangan yang monoton dan manuver tangan. Carpal Tunnel Syndrome (CTS) ialah suatu gangguan neuropati di pergelangan tangan yang sering terjadi pada komunitas motor di Pekanbaru. Tujuan dilakukan penyuluhan agar para komunitas motor dapat mengetahui cara penanganan dan pencegahan pada nyeri pergelangan tangan. Penyuluhan dilakukan oleh mahasiswa program alih jenjang fisioterapi Universitas Muhammadiyah Surakarta pada komunitas klub motor di Pekan baru menggunakan metode kuisioner pre dan post untuk mendapatkan data peserta, penyuluhan diberikan secara daring. Materi yang diberikan berupa pemahaman terkait pencegahan dan penanganan yang dapat dilakukan pada nyeri pergelangan tangan. Latihan yang diberikan berupa stretching exercise dan nerve & tendon gliding. Hasil dari penyuluhan setelah diberikan materi stretching exercise dan nerve & tendon gliding, peserta dalam komunitas motor di Pekanbaru dapat memahami bagaimana cara mencegah dan penanganan untuk mengurangi risiko terhadap nyeri pergelangan tangan atau carpal tunnel syndrome.