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All Journal Sainstek : Jurnal Sains dan Teknologi Jurnal Riset Madrasah Ibtidaiyah (JURMIA)
Anna Maulina
Laboratorium Penelitian Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang, Jl. Prof. Dr.Hamka Padang 25131, Indonesia
Computer Science & IT Education Other

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PREPARASI DYE SENSITIZED SOLAR CEL MENGGUNAKAN EKSTRAK ANTOSIANIN KULIT BUAH MANGGIS (Garcinia Mangostana L) Maulina, Anna; Hardeli, Hardeli; Bahrizal, Bahrizal
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (599.364 KB) | DOI: 10.31958/js.v6i2.115

Abstract

This study aims to determine the effect of the concentration of semi-solid electrolyte/polymer gel and determine the effect of the dye absorption technique on TiO2 paste the resulting DSSC efficiency. The results obtained by XRD characterization of TiO2 crystal phase is anatase and rutile TiO2 with a crystal size of 30.27 nm. Based of testing the light absorption of dye extract of purple sweet potato is known that the spectrum of the dye can absorb light at 533 nm wavelength maximum. The result of the conversion of sunlight into electrical energy obtained the highest value is at the highest PEG concentration at 0.1 M is 0,38% for TiO2 paste is mixed directly with the dye and 0,23% for TiO2 paste soaking in the dye for 24 hours using an electrolyte semi-solid/gel polymer with an area of 1 cm2.Key words: Anthocyanin, DSSC, semi-solid electrolyte, FTIR, UV-Vis, XRD
Pengaruh Kompetensi Sosial Guru Terhadap Proses Pembelajaran: Studi Kualitatif Di Kelas 5 SDN Batukali Maulina, Anna; Zumrotun, Erna
Jurnal Riset Madrasah Ibtidaiyah (JURMIA) Vol. 4 No. 2 (2024): Jurnal Riset Madrasah Ibtidaiyah
Publisher : Jurnal Riset Madrasah Ibtidaiyah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32665/jurmia.v4i2.3279

Abstract

Social competence is the ability of teachers to communicate and interact with students during the learning process. This competence is very important so that teachers can be good examples for students, help students develop individuals who are full of empathy, attention, and concern for others. This study aims to assess in detail the influence of social competence possessed by class teachers. This study uses a qualitative approach. The main subjects of the study, namely grade V teachers and supporting objects, namely students. Data collection techniques through observation, interviews, and documentation. Data were analyzed using Miles and Huberman's theory, including data reduction, data presentation, and drawing conclusions. The results of the study showed that the social competence of grade V teachers, including inclusive attitudes, polite communication, adaptability, and communication with the professional community, had a positive effect on the learning process. Teachers who are effective in social competence create a pleasant learning atmosphere, increase comfort, motivation, and student learning achievement. This study concludes the importance of strengthening social competence in improving the quality of the learning process in the classroom.
Co-Authors Bahrizal Bahrizal Hardeli Hardeli Zumrotun, Erna