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All Journal TRANSIENT: Jurnal Ilmiah Teknik Elektro Jurnal Didaktika Dwija Indria MASALIQ: Jurnal Pendidikan dan Sains
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PERANCANGAN MAXIMUM POWER POINT TRACKING PANEL SURYA MENGGUNAKAN CONVERTER ARUS SEARAH TIPE BOOST DENGAN METODE ALGORITMA PERTURB AND OBSERVE PENGISIAN BATERAI PANEL REMOTE TERMINAL UNIT PT. PLN Anggie Maulana; Budi Setiyono; Sudjadi Sudjadi
Transient: Jurnal Ilmiah Teknik Elektro TRANSIENT, VOL. 8, NO. 4, DESEMBER 2019
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penggunaan energi surya sebagai sumber energi listrik memiliki beberapa kelemahan, seperti daya listrik yang dihasilkan oleh panel surya dipengaruhi oleh iradiasi sinar matahari, suhu lingkungan, dan sudut datang matahari. Hal ini menyebabkan daya yang dihasilkan akan mengalami fluktuasi. Maximum Power Point Tracking (MPPT) merupakan suatu metode untuk memaksimalkan daya keluaran yang dihasilkan oleh panel surya. Penelitian ini bertujuan untuk merancang sistem MPPT menggunakan rangkaian boost converter dengan algoritma Perturb and Observe. Pengujian sistem MPPT dilakukan dengan memvariasi nilai iradiasi dan beban, kemudian menganalisis daya keluaran panel surya tersebut, serta membandingkan daya keluaran sistem yang menggunakan MPPT dan tidak menggunakan MPPT terhadap perubahan beban. Sistem pencarian titik daya maksimum panel surya menggunakan rangkaian boost converter dengan algoritma Perturb and Observe telah berhasil direalisasikan. Daya maksimum yang dihasilkan sistem MPPT dengan variasi beban 50 Ω, dan 100 Ω pada iradiasi 1077 W/m2 dan suhu 30oC adalah 40,16 W dan 41,33 W, sedangkan pada iradiasi 767 W/m2 dan suhu 30oC adalah 30,57 W dan 33,52 W. Sistem MPPT dapat mempertahankan nilai daya pada titik maksimalnya saat terjadi perubahan beban, sedangkan pada sistem yang tidak menggunakan MPPT nilai daya yang dihasilkan akan berubah-ubah sesuai dengan perubahan beban.
Penerapan model pembelajaran langsung untuk meningkatkan hasil belajar matematika siswa kelas V di sekolah dasar I'anatul Khoiriyah; Much. Arsyad Fardani; Sudjadi Sudjadi
Didaktika Dwija Indria Vol 13, No 3 (2025): Didaktika Dwija Indria
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ddi.v13i3.102590

Abstract

This study aims to improve the mathematics learning outcomes of fifth-grade elementary school students through the application of the direct instruction model. Direct instruction is a structured teaching approach that includes clear objectives, teacher demonstrations, guided practice, and independent student activities. This classroom action research was conducted in two cycles, each consisting of planning, implementation, observation, and reflection stages. The research involved 35 fifth-grade students as participants. Data were collected through learning outcome tests, classroom observations, and documentation. The results showed a consistent improvement in students’ mathematics achievement after implementing the direct instruction model. In the pre-cycle, many students had not yet met the minimum mastery criteria. However, after two cycles of applying direct instruction, the number of students reaching the expected learning standards increased significantly. The findings suggest that the direct instruction model is effective in enhancing students’ understanding and performance in mathematics. Therefore, it is recommended for elementary school teachers to adopt this model, particularly when teaching abstract or procedural mathematical concepts.
Penerapan Model Problem Based Learning Berbantuan Media Konkret untuk Meningkatkan Hasil Belajar Matematika Kelas II SD 1 Kalirejo Hesti Widya Prasida; Much Arsyad Fardani; Sudjadi Sudjadi
MASALIQ Vol 5 No 3 (2025): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i3.5728

Abstract

The purpose of this study is to improve the mathematics learning outcomes of second-grade students at SD 1 Kalirejo on the topic of time measurement using the Problem Based Learning model supported by concrete media in the form of a time board. This research is a Classroom Action Research (CAR) conducted in two cycles, each consisting of planning, action implementation, observation, and reflection stages. The subjects of the study are second-grade students in the even semester of the 2024/2025 academic year, totaling 30 students, comprised of 19 boys and 11 girls. Cycle I and Cycle II each took place over three meetings. The results indicate an improvement in the average score of students from 58 in the pre-cycle to 70.07 in Cycle I, and reaching 82.43 in Cycle II. The percentage of classical completeness also increased from 43.33% in the pre-cycle to 66.67% in Cycle I, and reaching 80% in Cycle II. In addition to improving learning outcomes, the application of the PBL model also positively impacted students' active participation, critical thinking skills, and teamwork. The utilization of concrete media in the form of a time board facilitated students' understanding of the concept of time visually and tangibly, which is appropriate for their cognitive development level. The results of this study confirm that the application of the Problem Based Learning model assisted by concrete media has been proven effective in enhancing mathematics learning outcomes for students at the elementary school level.
Penerapan Model Project Based Learning untuk Meningkatkan Hasil Belajar Siswa Materi Kekayaan Suku Bangsaku Kelas III SD Moh Sholihul Anshori; Much Arsyad Fardani; Sudjadi Sudjadi
MASALIQ Vol 5 No 3 (2025): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i3.6003

Abstract

This study aims to improve the learning outcomes of third-grade students at SD 1 Kalirejo on the topic of My Ethnic Group’s Wealth through the implementation of the Project Based Learning (PJBL) model. This classroom action research was conducted over three cycles, each consisting of planning, implementation, observation, and reflection stages. The research subjects were 20 third-grade students in the second semester of the 2024/2025 academic year, comprising 10 male and 10 female students. The results show a progressive increase in learning mastery across each cycle, from 30% in the initial condition to 40% in the first cycle, 60% in the second cycle, and 80% in the third cycle. These outcomes demonstrate that the PJBL model is effective in enhancing students’ cognitive learning outcomes, as indicated by the achievement of the minimum mastery criterion of ≥75%. Moreover, project-based learning provides a more contextual and meaningful learning experience, encouraging active student engagement in the learning process. These findings confirm that the implementation of the PJBL model not only improves learning outcomes in the subject of Pancasila Education but also contributes to the development of 21st-century competencies at the elementary school level.
Co-Authors Anggie Maulana Budi Setiyono Hesti Widya Prasida Moh Sholihul Anshori Much Arsyad Fardani