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All Journal Jurnal Pendidikan Fisika dan Keilmuan (JPFK) MASALIQ: Jurnal Pendidikan dan Sains
Ramadina, Salsabila
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Religion Astronomy Education Physics Social Sciences

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Model Dye-Sensitized Solar Cell dan Aplikasinya Berdasarkan Data Temperatur Harian: Studi Kasus Pangkalpinang Noor, Aliefia; Hamdini, Meri; Ramadina, Salsabila; Tiandho, Yuant
Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Vol 6, No 2 (2020)
Publisher : UNIVERISTAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/jpfk.v6i2.7707

Abstract

Dye-Sensitized Solar Cells (DSSC) is photovoltaic with a dye that functions as an acceptor of sunlight. The great potential of using DSSC lies in the ease of the synthesis process, and the dyes used can come from plants. However, like most other solar cells, increasing the operating temperature can degrade the DSSC performance and thus decrease the efficiency. This article presents a model of the relationship between the effect of temperature on DSSC performance. The model proposed is derived from the DSSC equivalence with a diode circuit. By confirming the experimental research results, it is known that the model presented in this study has excellent accuracy on various DSSC performance parameters (R2> 0.99). The performance studied includes the I-V curve's shape, the value of the short-circuit current, the diode leakage current, and the open-circuit voltage. Based on daily temperature data in Pangkalpinang City, the potential performance of the DSSC could also be determined when it was developed in Kep. Bangka Belitung. The short-circuit current value obtained is in the range of 14 A with a voltage of 0.6 V. It is hoped that this proposed model can be information for the development of DSSC because of its enormous potential application in Indonesia.
Efektivitas Peregangan Otot untuk Meningkatkan Konsentrasi Belajar pada Mahasiswa Jurusan Psikologi di Universitas Negeri Padang Sari, Anisa Silvina; Pradhita, Cindi; Ramadhani, Putri; Ramadina, Salsabila; Aulia, Prima
MASALIQ Vol 4 No 4 (2024): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v4i4.3189

Abstract

Decreased concentration on learning can occur due to prolonged sitting, which causes nervous tension. This can be overcome by stretching the muscles. This study aims to determine and analyze the effectiveness of muscle stretching, namely progressive muscle relaxation to increase the concentration of learning students majoring in psychology at Padang State University. The method used is an experiment with a pretest-posttest control group design. The sampling technique is purposive sampling which involves 10 psychology students who have moderate and low concentration scores, then divided into two groups, namely the experimental group (5 people) and the control group (5 people). Data analysis showed that the average test score of the experimental group increased from 73.00 to 79.80, while the control group decreased from 74.40 to 72.60. Normality and homogeneity tests confirmed that the data were normally distributed and homogeneous. Hypothesis testing using independent sample t-test showed a significant difference between the two groups with a significance value of 0.006 (p < 0.05). The conclusion of this study shows that muscle stretching effectively improves students' study concentration, as shown by the significant increase in the mean score of the experimental group compared to the control group.
Co-Authors Hamdini, Meri Noor, Aliefia Pradhita, Cindi Prima Aulia Putri Ramadhani, Putri Sari, Anisa Silvina Yuant Tiandho