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All Journal Pendas : Jurnah Ilmiah Pendidikan Dasar JURNAL PENDIDIKAN TAMBUSAI JRIIN :Jurnal Riset Informatika dan Inovasi
Hidayatullah, Miftahul
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Computer Science & IT Decision Sciences, Operations Research & Management Social Sciences Other

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Analisis Performa Clustering: K-Means dan Similarity Matrix dalam Evaluasi Silhouette, DBI, CHI, dan Dunn Index Ramadhan, Bhima Fajar; Abdillah, Bimo Musthafa; Hidayatullah, Miftahul; Faizal, Muhamad Nur; Winata, Rio Aditya; Alfian, Zurnan
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.30265

Abstract

Clustering merupakan teknik penting dalam data mining yang bertujuan untuk mengelo­­­­­­­mpokkan data berdasarkan kemiripan antar objek. Penelitian ini membahas analisis performa dua pendekatan clustering, yaitu K-Means dan Similarity Matrix, dalam konteks evaluasi kualitas cluster. Pendekatan Similarity Matrix diterapkan menggunakan hierarchical clustering dengan metode complete-linkage, sedangkan K-Means menggunakan data fitur numerik secara langsung. Keduanya diuji pada beberapa dataset dan dievaluasi menggunakan metrik kuantitatif seperti Silhouette Score, Davies-Bouldin Index (DBI), Calinski-Harabasz Index (CHI), dan Dunn Index. Hasil eksperimen menunjukkan bahwa pendekatan K-Means cenderung unggul dalam pemisahan cluster (Silhouette dan CHI lebih tinggi), sedangkan pendekatan Similarity Matrix lebih baik dalam kepadatan dan keseragaman cluster (DBI dan Dunn Index lebih rendah). Temuan ini menegaskan pentingnya pemilihan metode clustering yang sesuai dengan karakteristik data dan tujuan analisis.
Peramalan Potensi Energi Surya di Indonesia Berbasis Data Meteorologi Menggunakan Model Facebook Prophet Novriadi, Ilham; Mauludani, Artha; Hidayatullah, Miftahul; Satriawan, Ariel Modjo
Jurnal Riset Informatika dan Inovasi Vol 3 No 9 (2026): JRIIN : Jurnal Riset Informatika dan Inovasi (INPRESS)
Publisher : shofanah Media Berkah

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Abstract

Indonesia, sebagai negara tropis di garis khatulistiwa, memiliki potensi energi surya melimpah dengan variasi spasial yang tinggi. Tantangan utama pengembangan Pembangkit Listrik Tenaga Surya (PLTS) adalah sifat intermiten yang dipengaruhi pola musim dan kualitas data meteorologi. Penelitian ini membangun model peramalan potensi energi surya menggunakan algoritma Facebook Prophet berbasis data lama penyinaran matahari harian dari BMKG. Hasil menunjukkan disparitas potensi energi antarprovinsi, dengan wilayah timur (NTT, NTB) mencapai >5 kWh/hari (sistem 3 kWp) dan wilayah barat (Kalimantan) di bawah 4 kWh/hari. Model mampu mengidentifikasi pola musiman, namun evaluasi pada studi kasus Banten menunjukkan akurasi terbatas dengan RMSE 0,577 kWh dan R2 negatif (-0,7815), mengindikasikan perlunya optimasi parameter dan penanganan data lebih lanjut. Temuan ini memberikan dasar bagi pengembangan kebijakan energi surya yang terdiferensiasi sesuai karakteristik wilayah.
STUDI ANALISIS KESULITAN MEMBACA PADA SISWA KELAS 2 SD NEGERI MERTAN 04 KABUPATEN SUKOHARJO TAHUN PELAJARAN 2025/2026 Hidayatullah, Miftahul; Ratih Rasanawati, I Made
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 1 (2026): Volume 11 No.1, Maret 2026.
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i1.40286

Abstract

This study aims to: 1) describe the types of reading difficulties experienced by second-grade students of Mertan 04 Elementary School, Sukoharjo Regency in the 2025/2026 Academic Year, 2) find factors that influence reading difficulties in second-grade students of Mertan 04 Elementary School, and 3) identify teacher efforts in helping students overcome initial reading difficulties. The method used in this study is descriptive qualitative with a case study approach. The subjects of this study included the class teacher and eleven second-grade students. The results of the study indicate that: 1) initial reading difficulties in grade II students include difficulties in recognizing and distinguishing letters that look similar such as b-d, p-q, and m-n, difficulties combining letters into syllables and words, reading by spelling, and less fluent and intense in reading simple words and sentences; 2) factors that influence initial reading difficulties include internal factors such as low interest and motivation in reading, lack of memory, and low self-confidence, and external factors such as lack of support from the family environment, limited reading at home, and differences in students' abilities in understanding learning materials; 3) efforts made by teachers to help students overcome reading difficulties include providing individual reading guidance, inviting students to read regularly, using media and additional reading, and working together with parents to accompany students learning to read at home.
Co-Authors Abdillah, Bimo Musthafa Faizal, Muhamad Nur Mauludani, Artha Novriadi, Ilham Ramadhan, Bhima Fajar Ratih Rasanawati, I Made Satriawan, Ariel Modjo Winata, Rio Aditya Zurnan Alfian