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Penerapan Random Forest Untuk Klasifikasi Risiko Penyakit Stroke Pada Rentang Usia 40-85 Tahun adjie; Muhammad Aimar Al Baihaqi; Adam Surya Dharma; Ivan Variz Febrinanda; Danurtirto Satria Prananda
JUKOMIKA (Jurnal Ilmu Komputer dan Informatika) Vol. 8 No. 2 (2025): Desember
Publisher : LPPMPP Yayasan Sejahtera Bersama Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54650/jukomika.v8i2.617

Abstract

Stroke merupakan penyebab kematian dan kecacatan tertinggi ketiga di dunia dengan risiko yang meningkat tajam pada usia 40 tahun ke atas. Sebagian besar penelitian sebelumnya pada dataset Stroke Prediction (Kaggle) melaporkan akurasi tinggi namun tidak membahas dampak ketidakseimbangan kelas yang sangat ekstrem (rasio ~1:19) dan jarang memfokuskan analisis pada rentang usia risiko tinggi. Penelitian ini menerapkan algoritma Random Forest untuk klasifikasi risiko stroke khusus pada individu berusia 40–85 tahun menggunakan dataset sebanyak 2.875 data setelah filtering usia. Dataset memiliki ketidakseimbangan kelas tinggi (stroke 8.42%, non-stroke 91.58%). Tahapan preprocessing meliputi pemeriksaan missing value dan duplicate data (tidak ditemukan) serta standarisasi fitur numerik menggunakan Z-Score Standardization (mean = 0, std = 1). Model dievaluasi dengan 10-Fold Stratified Cross Validation pada perangkat lunak Orange Data Mining. Hasil menunjukkan Random Forest mencapai akurasi 96,5%, AUC 0,914 (kelas stroke), precision 96,3%, recall 96,5%, F1-score 96,2%, dan MCC 0,750. Analisis feature importance mengidentifikasi usia, kadar glukosa rata-rata, dan BMI sebagai tiga prediktor terkuat. Dibandingkan dengan Logistic Regression, Decision Tree, SVM, dan Naive Bayes, Random Forest menunjukkan performa paling unggul. Penelitian ini memberikan kontribusi berupa model klasifikasi yang andal dan interpretabel pada populasi usia 40–85 tahun serta rekomendasi klinis berbasis variabel paling berpengaruh.
MODEL COOPERATIVE LEARNING DALAM MENANAMKAN NILAI AGAMA DAN BUDI PEKERTI PADA ANAK USIA DINI DI TK SURYA GEMILANG Suhari; Adjie; Nashrul; Habib; Romlah
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 No. 03, September 2026 Release
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i03.59380

Abstract

The instilling of religious values and moral character in early childhood is an important foundation in character formation that will influence children's development at the next level of education. One learning model that can support this process is Cooperative Learning, as it provides children with opportunities to learn through collaboration, social interaction, and direct learning experiences. This study aims to describe the planning and implementation of the Cooperative Learning model in instilling religious values and moral character in early childhood at TK Surya Gemilang, Malang City. The study used a qualitative approach with a descriptive research design. The research subjects consisted of the school principal, one teacher, and three students. Data were collected through observation, semi-structured interviews, and documentation. The validity of the data was established using source triangulation and technique triangulation, while data analysis referred to the Miles, Huberman, and Saldaña model, which includes data condensation, data display, and conclusion drawing. The results showed that learning planning had been systematically arranged through the preparation of Daily Lesson Plans (RPPH) that integrated the Cooperative Learning model, learning objectives, religious materials, learning media, the formation of heterogeneous groups, and the assessment of students' development. The implementation of learning took place through group activities combined with habituation practices such as reciting prayers, congregational prayers, memorizing short surahs, reading the Qur'an or Iqra', as well as various collaborative activities capable of developing attitudes of cooperation, responsibility, discipline, care, tolerance, and politeness. This study concludes that the Cooperative Learning model is effective in supporting the instilling of religious values and moral character in early childhood through learning that is active, collaborative, and aligned with children's developmental characteristics.