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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Journal of Engineering and Technological Sciences
Eko Susilowati
1Department of Mathematics and Natural Sciences Education, Faculty of Education, Lambung Mangkurat University, H. Hasan Basry, P.O. Box 87, Banjarmasin 70123, Indonesia
Astronomy Earth & Planetary Sciences Education Engineering Materials Science & Nanotechnology Physics

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Experimental Study on the Sensitive Emission Lines Intensities of Metal Samples Using Laser Ablation Technique and Its Comparison to Arc Discharge Technique Susilowati, Eko; Lie, Tjung Jie; Kurniawan, Hendrik
Journal of Engineering and Technological Sciences Vol 36, No 1 (2004)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.97 KB) | DOI: 10.5614/itbj.eng.sci.2004.36.1.1

Abstract

An experimental study has been carried out to measure the sensitive emission lines intensities of several metal samples (copper, zinc, silver, gold, gallium, nickel, silicone and iron) using laser ablation technique conducted in low pressure surrounding gas by means of Laser Induced Shock Wave Plasma Spectroscopy (LISPS) and in atmospheric pressure region using Laser Induced Breakdown Spectroscopy (LIBS). In both cases the Nd-YAG laser was operated at its fundamental wavelength of 1.064 nm with pulse duration of 8 ns and its intensity tightly focused on the metal samples in helium or air as an ambient gas. The laser energy was fixed at approximately 100 mJ using a set of neutral density filters placed tilted in front of the laser output window. The result of the intensity measurements showed a good agreement which those obtained using arc discharge technique as shown in Massachusetts Institute of Technology Wavelength Table. Further evaluation of these results on the basis of standard deviation leads to the conclusion that LISPS is more favorable for quantitative analysis compared to LIBS. It was further shown that replacing air by helium gas at low pressure improve to some extent the LISPS reproducibility and sensitivity.
INCREASING STUDENTS’ RESPONSIBILITY AND SCIENTIFIC CREATIVITY THROUGH CREATIVE RESPONSIBILITY BASED LEARNING Suyidno, Suyidno; Susilowati, Eko; Arifuddin, Muhammad; Misbah, Misbah; Sunarti, Titin; Dwikoranto, Dwikoranto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p147-157

Abstract

Scientific creativity and responsibility are believed to be key factors for overcoming increasingly complex real-life problems faced by students; but both competencies are not trained in school. Therefore, this research aims to describe the effectiveness of creative responsibility based learning (CRBL) to increase student?s responsibility and scientific creativity on physics learning in senior high school. This research used one group pretest-posttest design involving 66 students of two senior high schools in Banjarmasin, South Kalimantan, Indonesia. The data collection was conducted by using responsibility observation emphasizing on participatory, cooperation, delivering an opinion, and leadership. Additionally, data were gained through scientific creativity test emphasizing on problem finding, product improvement, scientific imagination, scientific problem solving, and creative product design. The data analysis was done through qualitative descriptive, n-gain, and paired t-test. The results showed      (1) student?s responsibility for each meeting is in good criteria, and (2) there is a significant increase on students? scientific creativity at ? = 5 %, with n-gain constitutes moderate category. Thus, the CRBL is believed to be effective to increase student?s responsibility and scientific creativity in physics learning
Increasing Students’ Responsibility and Scientific Creativity through Creative Responsibility Based Learning Suyidno, Suyidno; Susilowati, Eko; Arifuddin, Muhammad; Misbah, Misbah; Sunarti, Titin; Dwikoranto, Dwikoranto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p147-157

Abstract

Scientific creativity and responsibility are believed to be key factors for overcoming increasingly complex real-life problems faced by students; but both competencies are not trained in school. Therefore, this research aims to describe the effectiveness of creative responsibility based learning (CRBL) to increase student’s responsibility and scientific creativity on physics learning in senior high school. This research used one group pretest-posttest design involving 66 students of two senior high schools in Banjarmasin, South Kalimantan, Indonesia. The data collection was conducted by using responsibility observation emphasizing on participatory, cooperation, delivering an opinion, and leadership. Additionally, data were gained through scientific creativity test emphasizing on problem finding, product improvement, scientific imagination, scientific problem solving, and creative product design. The data analysis was done through qualitative descriptive, n-gain, and paired t-test. The results showed      (1) student’s responsibility for each meeting is in good criteria, and (2) there is a significant increase on students’ scientific creativity at α = 5 %, with n-gain constitutes moderate category. Thus, the CRBL is believed to be effective to increase student’s responsibility and scientific creativity in physics learning
Co-Authors Arifuddin, Muhammad Dwikoranto Hendrik Kurniawan Misbah Misbah Suyidno Suyidno TITIN SUNARTI Tjung Jie Lie