The Khulafaur Rasyidin era (632–661 CE) was a pivotal period in Islamic history, marked by the leadership of the first four caliphs: Abu Bakr, Umar, Uthman, and Ali. The political thought of this era emphasized principles of justice, consultation (shura), and the application of Islamic law (sharia) in governance. Each caliph adopted distinct approaches to state administration, such as Abu Bakr's emphasis on collective consultation and Umar's establishment of a more bureaucratic governance structure. Despite political and social challenges, including territorial expansions and internal conflicts, the political foundations of the Rashidun Caliphate underscored the importance of just leadership and the unity of the Muslim community. This political philosophy significantly contributed to the development of Islamic governance rooted in justice and sharia.

Rainfall potential analysis plays a critical role in the management of air resources, mitigation of hydrometeorological disasters, and agricultural activity planning. Accurate estimation of rainfall patterns is essential to ensure effective decision-making in irrigation systems, water resource management, and disaster risk reduction strategies. This study aims to model the probability of rainfall occurrence using a statistical approach based on historical data obtained from the Bureau of Meteorology. The data spans a multi-year period and captures seasonal and regional variability in rainfall events. To characterize rainfall patterns, various probability distributions are tested, including the exponential distribution and the Weibull distribution, which are commonly applied in hydrological studies. Furthermore, the Markov chain method is employed to assess the likelihood of rainfall occurrence on a given day based on the conditions of the preceding day, thereby capturing temporal dependencies. Parameter estimation is conducted using Maximum Likelihood Estimation (MLE), a robust statistical method that enhances the precision of the model. The suitability of each probability distribution in representing the observed rainfall data is evaluated through goodness-of-fit tests such as the Kolmogorov-Smirnov test. The findings reveal that certain distributions align more closely with the local rainfall characteristics, demonstrating the importance of regional analysis in climate modeling. The combination of probabilistic modeling, Markov analysis, and rigorous statistical testing provides a reliable framework for forecasting rainfall. These results are expected to serve as a scientific basis for stakeholders in agriculture, environmental planning, and disaster preparedness, offering insights that support sustainable water resource utilization and risk management.

The purpose of this study is to determine and describe quantitative data on the effect of learning discipline on social studies learning outcomes in grade V. This study uses a quantitative approach with a Pre-Experimental Design type of research. The experimental design used is One-Group Pretest-Posttest Design. The population and sample in this study were grade V students with a total of 20 students. The data collection techniques used were observation and testing. The data analysis techniques used were descriptive statistical analysis and inferential statistical analysis. The results of this study indicate that the application of learning discipline has an effect on student learning outcomes. This can be seen in the difference in the average number of learning outcomes before applying learning discipline (pretest) of only 54.37. While the average number of learning outcomes after applying discipline (posttest) was 83.43. And the results of the inferential statistical analysis using the t test showed that the t-count value obtained was 7.935. Degrees of freedom (db) = 20 - 1 = 19 with a significance level of 0.05 obtained t table = 2.093. So, tcount > ttable or 7.935 > 2.093, then the null hypothesis (H0) is rejected and the alternative hypothesis (H1) is accepted. This means that the application of learning discipline has an effect on student learning outcomes in the subject of social studies class V SDN Wadukopa.

This study aims to (1) determine the feasibility of Audio Visual-based learning media in the subject of Basic Automotive Engineering Works (PDTO) at SMK Negeri 8 Purworejo, (2) to determine the increase in learning interest of class X TBSM students at SMK Negeri 8 Purworejo after using Audio Visual-based learning media. The data collection technique in this study was by distributing questionnaires. This study used the Research and Development (R & D) method with the research subjects taken being class X TBSM students at SMK Negeri 8 Purworejo totaling 36 students. The results showed a difference in learning interest in students at SMK Negeri 8 Purworejo between classes that did not use audio visual media and classes that used audio visual media for the subject of Basic Automotive Engineering Works (PDTO), namely a percentage of 73.33 was obtained and in the second data collection or research using audio visual learning media, a percentage of 86.38 was obtained, there was a significant increase of 13.05. From the increase in learning interest, it can be concluded that using audio-visual learning media can increase students' learning interest, especially in the subject of Basic Automotive Engineering Work, basic competency of mechanical measuring instruments.

Industri genteng sangat mengutamakan tampilan dan ketepatan, sehingga kualitas produk harus menjadi perhatian utama. PT XYZ sebagai salah satu supplier genteng nasional saat ini tengah menghadapi permasalahan tingginya jumlah produk cacat terutama pada bagian roll forming machine. Jenis cacat yang paling dominan antara lain penyok sebesar 30%, dimensi tidak sesuai (dimensi NG) sebesar 26%, kerut sebesar 18%, berkarat sebesar 15%, tergores sebesar 7%, dan pudar warna sebesar 4%. Pengumpulan data dilakukan pada periode Juni sampai dengan Agustus 2024 dan memiliki persentase cacat yang cukup tinggi serta telah melampaui batas target perusahaan. Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis sumber permasalahan dengan menggunakan metode Fault Tree Analysis (FTA) dan Failure Mode and Effect Analysis (FMEA). Melalui FMEA akan diperoleh nilai Risk Priority Number (RPN) yang menjadi acuan utama dalam menentukan skala prioritas perbaikan yang dibutuhkan.

KSOP Class III Tanjung has a big responsibility in ensuring that the guidance service runs smoothly. However, the realization of the availability of guided facilities and infrastructure is still not in accordance with the state of the field. This study aims to calculate the adequacy level (ideal) of human resources, facilities and infrastructure for ship guidance according to the report of guiding activities. This research is quantitative descriptive with a formula method or an empirical calculation formula of the level of adequacy, used as a reference or reference provided by the Directorate General of Ports. The results of the study show that there is an excess of Human Resources (HR) and Guidance Infrastructure amounting to 2 guides and 1 kepil ship. The factor that affects the calculation of the ideal result is the characteristics of the vessel's guiding area.

Empowering an effective work culture is the key to improving team performance to achieve the vision and mission of the Student Activity Unit (UKM), especially UKM Sakuntala. In improving the performance of the Sakuntala UKM team, they often face several challenges in terms of communication, motivation, training, performance monitoring and giving awards. To overcome these challenges, training was carried out using counseling and question and answer methods, presenting material on the concept of effective work culture in improving team performance. The research results show that an effective work culture, such as effective communication, teamwork, and motivation, has a significant impact on the performance of the Sakuntala UKM team. Material includes Empowering an Effective Work Culture, Collaboration and Teamwork, and the Role of Leaders. The results of this outreach show that all members of UKM Sakuntala have a fairly good understanding of effective work culture and understand enough about improving teamwork. This counseling also emphasizes the importance of harmonious relationships between leaders and subordinates, as well as a conducive work environment. It is hoped that this counseling can help Sakuntala UKM members develop a more effective work culture, improve communication skills, strengthen the performance of the Sakuntala UKM team, and provide insight into facing the challenges that exist in the organization. This provides a strong foundation for empowering a more effective work culture in the future for Sakuntala.

The application of data mining in the evaluation of Hadrah tests at Pesantren Salafiyah Syafi'iyah is explored using the Random Forest algorithm. Hadrah, a form of Islamic artistic performance involving vocal and percussion elements, is integral to the cultural and spiritual life in Islamic boarding schools. The objective of this research is to enhance the accuracy and objectivity of performance assessments in Hadrah, particularly in the context of competition or educational evaluation at Pesantren Salafiyah Syafi'iyah. By utilizing the Random Forest method, which is a robust machine learning technique, the study aims to minimize the subjectivity and inconsistency inherent in traditional evaluation methods. The study leverages secondary data from previous Hadrah tests, applying preprocessing steps to ensure the data is suitable for analysis. The results show that Random Forest provides a high level of precision in classifying participants based on key assessment features such as tempo, consistency, and overall performance. This method contributes significantly to improving the reliability and fairness of the evaluation process, ensuring a more standardized approach to assessing artistic skills in the context of Islamic traditions. The findings suggest that data-driven approaches can play a pivotal role in preserving and promoting Islamic arts while enhancing the educational process.

This study aims to describe the collaboration between student of the field PPL from STAIN Mandailing Natal and STAITA Padang Sidempuan in welcoming the holy month of Ramadan 1446 H at MAS Al-Mandily Kampung Padang. The initiative aims to contribute positively to strengthening relationships between educational institutions while introducing religious values to the suurounding communnity. The method used in this study is a participatory approach that involves students and the community of MAS Al-Mandily in every stage of the activity. The result of this study indicate that this collaboration not only improves the quality of religious activities at MAS Al-Mandily, but also provides valuable experience for PPL students in implementing the knowledge they have learned in the field. In addition, the relationship between the two educational institutions will be closer, and have a positive impact on the formation of student character.

Dengue Hemorrhagic Fever (DHF) remains a major public health issue in Indonesia, particularly in endemic areas like Simpang III Sipin Village. This disease is transmitted by Aedes sp mosquitoes, and the presence of their larvae is a key indicator of the potential spread of DHF. Environmental conditions, such as water reservoirs and humidity, alongside community behaviors, play significant roles in supporting the growth of these mosquito larvae. Therefore, research is needed to identify the factors influencing the presence of Aedes sp larvae. Methods: This study utilized a cross-sectional design with a quantitative approach. The sample consisted of 143 households, selected using purposive sampling techniques. Data were collected via questionnaires and direct observations. Additionally, measurements of environmental conditions such as air humidity and temperature were taken using a hygrothermometer. The variables under study included knowledge, attitudes, behavior regarding water reservoir drainage (TPA), number of TPAs, air humidity, and air temperature. Results: Data analysis was conducted using the Chi-Square statistical test to determine the relationships between the variables. The results indicated that factors like knowledge level (p = 0.008), attitude (p = 0.008), behavior related to draining water reservoirs (p = 0.001), number of water reservoirs (p = 0.013), and air humidity (p = 0.004) were significantly related to the presence of Aedes sp larvae. However, air temperature did not show a significant relationship (p = 0.675). Conclusion: High humidity environments encourage the growth of mosquito larvae, and insufficient knowledge and inadequate preventive behaviors contribute to increased mosquito populations, exacerbating the risk of DHF transmission.