In learning science, students can use the laboratory experiments and virtual laboratories (PhET) provided directly. This study aims to look at the comparison of students’ science process skills to the experimental and virtual laboratories in the aspects of formulating questions, measuring, conducting experiments, interpreting data, concluding and communicating. The instrument is in the form of an observation. The study was conducted on students who numbered two classes. In the first class, data collection was carried out using practicum methods with a total of 35 students from 40 students. While the second class collected data using a PhET simulation with a total of 36 students from 40 students. The research method used is experimental research using quantitative methods. At measuring aspect sig = 0.031, conclusion aspect sig = 0.010, and communicating aspect sig = 0.010 meaning statistically this difference is significant. Whereas in formulating the question aspect sig = 0.628, observing aspect of sig = 0.130, and collecting data aspect of sig = 0.218 means that this difference is not statistically significant.The results are the use of virtual laboratories has a better percentage value in student learning compared to the use of experimental laboratories on Archimedes Law.
The study of the influence of the diameter ratio and blade number to the performance of the cross flow wind turbine by using 2D computational fluid dynamics modeling AIP Conference Proceedings 1931, 030034 (2018) danar1405@gmail.comAbstract. This paper present experimental test results of separator and shift angle influence on Crossflow vertical axis wind turbine. Modification by using a separator and shift angle is expected to improve the thrust on the blade so as to improve the efficiency. The design of the wind turbine is tested at different wind speeds. There are 2 variations of crossflow turbine design which will be analyzed using an experimental test scheme that is, 3 stage crossflow and 2 stage crossflow with the shift angle. Maximum power coefficient obtained as Cpmax = 0.13 at wind speed 4.05 m/s for 1 separator and Cpmax = 0.12 for 12° shear angle of wind speed 4.05 m/s. In this study, power characteristics of the crossflow rotor with separator and shift angle have been tested. The experimental data was collected by variation of 2 separator and shift angle 0°, 6°, 12° and wind speed 3.01 -4.85 m/s.
Abstrak: Penelitian ini bertujuan untuk mengindentifikasi karakter disiplin siswa pada kegiatan menghafal Qur’an di Sekolah Dasar Sedunia. Paradigma penelitian ini adalah kualitatif dengan menggunakan pendekatan fenomenologis. Subjek penelitian ini adalah kepala sekolah dan guru tahfidz SD Sedunia. Penentuan subjek penelitian dilakukan dengan Teknik purposive dengan memilih sejumlah informan yang sesuai dengan tujuan penelitian. Teknik pengumpulan data menggunakan observasi, wawancara mendalam dan dokumentasi. Hasil penelitian menunjukan kegiatan menghafal Al-qur’an merupakan kegiatan yang bisa mengnternalisasi nilai karakter disiplin di sekolah dasar. Guru membuat perencanaan seperti rencana pelaksanaan pembelajaran, metode dan strategi yang jelas untuk mencapai target capaian hafalan siswa. Tahap pelaksanaan, guru menjaga konsistensi dalam penerapan aturan sekolah maupun kelas. Tahap akhir, guru melakukan refleksi terhadap hafalan dan perilaku disiplin siswa pada tiap pembelajaran. Kegiatan seperti menghafal Al-qur’an, muroja’ah, dan mengikuti aturan mampu menginternalisasi nilai disiplin siswa. Upaya internalisasi nilai disiplin ini tidak terlepas dari keteladanan guru-guru.Â
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