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All Journal Journal of Natural Sciences and Mathematics Research JIPF (Jurnal Ilmu Pendidikan Fisika)
Yeni Rima Liana
Universitas Negeri Semarang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Materials Science & Nanotechnology Physics

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Problem-Based Learning Approach with Supported Interactive Multimedia in Physics Learning: Its Effects on Critical Thinking Abilty Yeni Rima Liana; Puji Iman Nursuhud
JIPF (Jurnal Ilmu Pendidikan Fisika) Vol 5, No 2 (2020): May 2020
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1073.634 KB) | DOI: 10.26737/jipf.v5i2.1765

Abstract

In this research, interactive multimedia on dynamic electricity concepts was developed and tested. The purpose of this research was to analyze the feasibility and the effectiveness of interactive multimedia through a problem-based learning approach to students’ critical thinking ability. The research and development (R & D) had three stages: preliminary study, development, and field testing. The field testing was a quasi-experiment with a pretest and posttest control group design. The research subjects consisted of four lecturers as expert validators, two teachers and two groups of 72 students in a senior high school in Batang Regency, Central Java. Data were gathered by using questionnaires, observation, interviews, and written test. The results of the Normalized-gain test were 61.79 for the experiment group and 49.91 for the control group. This shows that there were differences in the increase of students' critical thinking ability between the control group and the experiment group.Therefore, it can be concluded that the application of interactive multimedia could improve students' critical thinking ability.
Utilization of Waste Combustion Heat as an Alternative Renewable Electric Energy Source Based on Thermoelectric Generator Yeni Rima Liana; Sulhadi Sulhadi; Mahardika Prasetya Aji
Journal of Natural Sciences and Mathematics Research Vol 5, No 2 (2019): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3346.715 KB) | DOI: 10.21580/jnsmr.2019.5.2.11029

Abstract

Thermoelectric generator is one alternative energy source that is using a temperature difference system to produce electrical energy. This research study aims to utilize combustion heat waste using a thermoelectric generator as a source of renewable electricity. This research method uses the experimental method. The thermoelectric system was made using seven thermoelectric modules TEC1 - 12706 arranged in series by varying the combustion media in the form of Rice husk, Sengon sawdust (Albizia chinensis) and Teak sawdust (Tectona grandis). The test is done by measuring the output voltage, the temperature of the cold side and the hot side which are then analyzed to get the output power and generator efficiency. From the trial results it was found that the greater of the temperature difference, then the output voltage, output power and generator efficiency increase. Output voltage, output power and maximum efficiency of testing prototype thermoelectric generator that generated were 4.64 V, W 20.38 and 16.46 % with fuel Teak sawdust in the tenth minute when the temperature difference of 76.17 0C.©2019 JNSMR UIN Walisongo. All rights reserved.
Co-Authors Mahardika Prasetya Aji Puji Iman Nursuhud S Sulhadi