Purpose: Breast cancer remains a significant cause of mortality among women, requiring accurate diagnostic methods. Traditional classification models often face accuracy challenges due to missing values and irrelevant features. This investigation advances the classification of breast cancer through the amalgamation of the C4.5 algorithm with K-Nearest Neighbor (KNN) imputation and Relief feature selection methodologies, thereby augmenting data integrity and enhancing classification efficacy.
Methods: The Wisconsin Breast Cancer Database (WBCD) was the core reference for evaluating the proposed methodology. KNN imputation addressed missing values, while Relief selected the most relevant features. The C4.5 algorithm executed training by utilizing data segregations in the corresponding proportions of 70:30, 80:20, and 90:10, with its efficiency gauged through a range of metrics, particularly accuracy, precision, recall, and F1-score.
Result: This innovative methodology achieved the highest classification accuracy of 98.57%, surpassing several existing models. Particularly noteworthy, the strategy being analyzed exhibited remarkable success relative to PSO-C4.5 (96.49%), EBL-RBFNN (98.40%), Gaussian Naïve Bayes (97.50%), and t-SNE (98.20%), demonstrating associated advancements of 2.08%, 0.17%, 1.07%, and 0.37%. These results confirm its effectiveness in handling missing values and selecting relevant features.
Novelty: Unlike prior studies that addressed missing values and feature selection separately, this research integrates both techniques, enhancing classification accuracy and computational efficiency. The findings suggest that this approach provides a reliable breast cancer diagnosis method. Future work could explore deep learning integration and validation on larger datasets to improve generalizability.

Penerapan teknologi dalam dunia pendidikan semakin penting untuk meningkatkan efektivitas dan keterlibatan siswa. Wordwall merupakan platform digital yang memungkinkan pembuatan permainan edukatif, kuis, dan latihan interaktif guna memperkuat pemahaman siswa terhadap materi pelajaran. Dalam kegiatan ini, Wordwall diterapkan secara langsung dalam proses pembelajaran di kelas 7 SMP Budi Murni 1 Medan, di mana siswa aktif berpartisipasi dalam berbagai aktivitas terkait materi yang diajarkan. Hasil menunjukkan bahwa penggunaan Wordwall mampu meningkatkan motivasi dan keterlibatan siswa secara signifikan, serta memperkuat pemahaman mereka terhadap materi. Peningkatan partisipasi terlihat dari antusiasme dan keaktifan siswa dalam menjawab pertanyaan dan mengikuti permainan edukatif yang disediakan oleh aplikasi ini. Dengan memanfaatkan Wordwall sebagai media pembelajaran, guru dapat menghadirkan pengalaman belajar yang lebih menarik dan interaktif. Penggunaan Wordwall terbukti efektif dalam mendukung proses belajar mengajar, dan diharapkan dapat terus diterapkan untuk meningkatkan kualitas pembelajaran di SMP Budi Murni 1 Medan maupun di sekolah-sekolah lainnya.

Generasi muda berperan penting dalam keberlanjutan lingkungan hidup. Pembiasaan kepedulian lingkungan sejak dini membantu membentuk pemahaman yang mendalam tentang pentingnya menjaga alam. Melalui pendidikan dapat mengembangkan kesadaran siswa terhadap lingkungan. Program sekolah Adiwiyata menjadi salah satu upaya pemerintah dalam bidang pendidikan untuk mendukung pembiasaan kepedulian lingkungan siswa. Tujuan penelitian ini adalah menganalisis kepedulian lingkungan siswa SMA Negeri 42 Jakarta yang menerapkan program sekolah Adiwiyata. Penelitian menggunakan jenis metode deskriptif kuantitatif dengan sampel 68 siswa kelas X. Kepedulian lingkungan siswa diuji menggunakan angket skala likert berjumlah 20 pernyataan. Indikator pernyataan diambil dari komponen skala NEP (New Ecological Paradigm). Hasil angket kepedulian lingkungan menunjukkan bahwa rata-rata siswa SMA Negeri 42 Jakarta memiliki kepedulian lingkungan yang sedang dan masih terdapat beberapa siswa memiliki kepedulian lingkungan yang rendah.

The majority of people in Balongsari Village, Megaluh District, Jombang Regency work as farmers. The rice harvest every harvest period produces very abundant agricultural waste. One of these agricultural wastes is rice husks. A common habit of farmers in this area is burning rice husks. This has an impact on environmental pollution, which comes from the smoke from burning rice husks. The purpose of this activity is to provide a solution for managing rice husk waste so that it is more useful. Proper processing of agricultural waste, namely rice husks, will produce various processed products, namely alternative fuel sources to replace kerosene or LPG gas or firewood. The objects of community service activities are youth of Karang Taruna and farmer groups. The results of this service activity are (1) Obtaining alternatives to replace fuel oil, (2) Reducing rice husk waste, (3) Providing added value to rice husks so that they become more useful. During the activity, participants were very enthusiastic about participating in the event from beginning to end, as evidenced by the results of the questionnaire after the activity, namely 90% of participants were very enthusiastic.

The postpartum period is a critical time for both the mother and newborn, where healthcare is essential to avoid the risk of mortality. This study aims to analyze the behavior of postpartum mothers and Acehnese families in postpartum care at the Beutong Health Center, Nagan Raya Regency in 2024. A quantitative research method with a descriptive design was used, and the sampling technique applied was total sampling, with a population of 40 postpartum mothers. Data collection was carried out through interviews using a questionnaire. The results showed that 77.8% of mothers and families were aware of the nutrition needed for postpartum mothers, 58.3% understood the process of uterine involution, and 100% of postpartum mothers knew daily activities to accelerate recovery. The family's supportive attitude towards postpartum care was evident in their dietary recommendations, such as providing vegetables (83.3%) and fish (80.5%), forbidding the mother from leaving the house (100%), and administering algae (88.9%). However, 30.6% of postpartum mothers did not consume vegetables regularly. These findings highlight the importance of improving family understanding and support in postpartum care to accelerate the recovery of mothers and babies. The implication of this research is expected to improve postpartum care programs at Beutong Health Center.

This study aims to analyze the effect of employee additional income (TPP) on employee performance with employee competence as a mediating variable at the Regional Secretariat of Mojokerto City during the COVID-19 pandemic. This study uses a quantitative approach with an explanatory method. Data were collected through a questionnaire distributed to 55 employees selected using proportional random sampling. Data analysis was conducted using multiple linear regression and path analysis to examine the relationships between variables. The results of the study indicate that TPP has a positive and significant effect on employee performance. Additionally, TPP also positively influences employee competence, which ultimately improves employee performance. Employee competence was found to mediate the relationship between TPP and employee performance, so that the increase in TPP not only has a direct impact on employee performance but also strengthens employee competence, contributing to overall performance improvement. This study also shows that other supporting factors, such as leadership and organizational culture, play an equally important role in improving employee performance. The conclusion of this study emphasizes that providing TPP can be an effective strategy to improve employee performance, especially when supported by continuous competency development programs and efforts to improve managerial quality.

This community service aims to examine the application of labor law in industrial relations in order to realize worker justice in Karang Taruna Pugeran Village, Gondang District, Mojokerto Regency. Karang Taruna is a youth organization that focuses on empowering youth and improving community welfare. This research was conducted with the aim of understanding the level of understanding and implementation of labor law and identifying the obstacles that exist in achieving worker justice in the Karang Taruna environment. The application of labor law in industrial relations to achieve worker justice stems from the need for protection of workers' rights and the creation of a balanced relationship between workers and employers. In this context, labor law aims to regulate the rights and obligations of workers and employers in order to create a fair working relationship.

Hypertension is a condition that is often found in health services. Hypertension is a condition when blood pressure in the blood vessels chronically increases. Many risk factors can cause hypertension, including age, race, gender, lifestyle, sodium consumption, smoking, alcohol consumption, stress level, and education. The urgency of this research is the large number of hypertension patients at the Purwodiningratan Surakarta Health Center and it is increasing almost every year. From the initial survey at the Purwodiningratan Surakarta Community Health Center, data was obtained that the number of hypertension patients over the last five years has increased, decreased, then increased again. This is supported by data on the number of hypertension patients in 2019 as many as 311, in 2020 as many as 214, in 2021 as many as 319, in 2022 as many as 125 and in 2023 up to now there are 335. The objective problem in this research is the number of patients with the disease. Hypertension increases from year to year, so research is needed on the relationship between knowledge, attitudes and family support and efforts to control hypertension. The importance of this research is as an effort to control hypertension which continues to increase from year to year by means of interviews and distributing leaflets with the aim of approaching the community. The aim of this research is to analyze how much impact the hypertension control program using the walet method (interviews and leaflets) has on the community. The achievement stages in this research are for the approach used in this research, namely cross sectional. The sample in this study was employees of the Purwodiningratan Health Center, totaling 41 respondents. The sampling technique uses the accidental sampling method based on inclusion and exclusion criteria. The statistical test used is the T test followed by a linear regression test at a significance level of 0.05. 

The aim of this research is to determine the influence of the work environment, individual characteristics and employee performance at Bank Syariah Indonesia. This research uses a qualitative approach using literature study and technical content analysis. In the work environment at Bank Syariah Indonesia there is a huge support for the creation of a company's activity processes. With a good working environment, good and pleasant working conditions will be created, this can provide employee morale. According to (Rahmawanti et al., 2014). a work environment that is always around workers who are able to influence them in carrying out the tasks they have been burdened with. Meanwhile, individual characteristics are that each person must have different views, goals, abilities and needs from each other. These differences will bring habits into the world of work, which will cause self-satisfaction and cause differences between each other even though they work in the same place. An employee's performance is the result of a person's work during the period of work, for example standards, targets or target criteria that have been determined in advance and have been mutually agreed upon.

Kondisi pandemi COVID-19 tahun selama kurang lebih 2 tahun menjadi pembelajaran bagi Indonesia khususnya di bidang kesehatan. Problematika di bidang kesehatan semakin terlihat jelas di era pandemi COVID-19 ini. Suhu tubuh normal berkisar antar 36,5?C - 37,5?C dan bila melebihi 38,5?C maka ada indikasi terinfeksi covid-19 yang kemudian akan diarahkan untuk isolasi baik mandiri atau di tempat yang telah disediakan. Tujuan adanya ruang isolasi adalah untuk mengendalikan penyebaran penyakit menular yang bisa mewabah. Ruang isolasi adalah ruangan khusus, orang-orang yang bisa masuk ke ruangan ini juga sangat terbatas. Mengingat di ruang isolasi tidak bisa sembarangan keluar masuk, untuk itu dikembangkanlah sistem monitoring yang mampu memantau beberapa parameter yang dibutuhkan agar ruangan tersebut memenuhi standar operasional prosedur. Salah satunya adalah pengelolaan tata udara yang harus dijaga yaitu suhu ruangan dan kelembapan ruangan. Udara dalam ruangan dan kontaminan dalam ruangan minimal 6x pertukaran udara perjam dengan suhu ruangan 24 - 26 C dan kelembaban relatif 40 - 60%. Berdasarkan permasalahan diatas penulis ingin menerapkan Fuzzy logic metode Mamdani pada sistem monitoring suhu dan kelembapan ruangan pasien isolasi Covid-19 berabsis IOT ( Internet of Things ). Hal ini tentunya sangat membantu berbagai pihak mulai perorangan, hingga lembaga kesehatan utamanya rumah sakit umum. Dari pengujian metode Fuzzy Logic tersebut diambil 10 data yang dibandingkan nilainya dengan Matlab, dapat dihasilkan rata-rata error output PWM sebesar 0.1%. Bedasarkan pengujian metode black box yang dilakukan dapat diketahui tampilan sistem sesuai dengan tampilan yang diharapkan, dengan persentase kesesuaian 100%. Untuk pengujian fungsional dapat diketahui tampilan website dapat berfungsi dengan baik pada browser Opera, Chrome, dan juga Microsoft Edge.