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All Journal Unnes Science Education Journal INDONESIAN JOURNAL OF APPLIED PHYSICS
Havid Noor Pamungkas, Havid Noor
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Astronomy Education Energy Materials Science & Nanotechnology Physics

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THE DEVELOPMENT OF PEKA-BASED THINKING ACTIVITY WORKSHEET TO MEASURE THE STUDENTS’ THINKING SKILL Guntara, Yudi; Pamungkas, Havid Noor
Unnes Science Education Journal Vol 6 No 1 (2017): February 2017
Publisher : Department of Integrated Science, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang in Collaboration with Perkumpulan Pendidikan IPA Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v6i1.13839

Abstract

Abstract ___________________________________________________________________ This research was aimed to develop PEKA-based thinking activity worksheet based, find out the feasibility of the worksheet, and determine the mastery level of thinking skill on the work and energy subject by using PEKA-based Thinking Activity worksheet. This type of research was research & development with 4-D model (Define, Design, Develop, and Disseminate). The initial product was validated by lecturers and teacher, and revised in the first revision. The revised worksheet was used in the limited testing then performed second revision. The final product was used in extensive trial. The results of this research shows that PEKA-based Thinking Activity worksheet is in good category with average score of 4.12. The level of student mastery in thinking skills was 55% at excellent, 36% at credit and 9% at satisfactory levels.
Karakterisasi Muatan Nanopartikel Silika (SiO2) dengan Metode Elektroforesis Santoso, Purwoko Haryadi; Kurniawan, Yohanes; Pamungkas, Havid Noor; Suparno, Suparno
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): IJAP Volume 11 ISSUE 01 YEAR 2021
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.48326

Abstract

Electrophoresis is one of the experimental methods employed in this study to characterize unique properties of charges of silica nanoparticles (SiO2) by observing their electrophoretic phenomena while they are situated in the electric field. This study is aimed to measure one of the SiO2 properties, namely the charge, using electrophoresis method through the variation of electric fields. The charge dependencies of SiO2 was probed towards five times variation of electric fields 1000, 1250, 1500, 1750, and 2000 V/m in 20 mL of aquades. The displacement of SiO2 could be observed through the light microscope with 160x magnification which the recorded observations then were analyzed by timeline-based software to measure the displacement time of particles during the observation. The results revealed that silica nanoparticles have the kind of positive charges in the colloidal solution. It is caused the magnitude of SiO2 charges is ranged constantly despite the variational effect of electric field in the environment. Light microscope has been optimized in this study to measure the velocity of SiO2 that tends to increase with respect to the magnifying electric fields given in the experiment.
THE DEVELOPMENT OF PEKA-BASED THINKING ACTIVITY WORKSHEET TO MEASURE THE STUDENTS’ THINKING SKILL Guntara, Yudi; Pamungkas, Havid Noor
Unnes Science Education Journal Vol 6 No 1 (2017): February 2017
Publisher : Department of Integrated Science, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang in Collaboration with Perkumpulan Pendidikan IPA Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/usej.v6i1.13839

Abstract

Abstract ___________________________________________________________________ This research was aimed to develop PEKA-based thinking activity worksheet based, find out the feasibility of the worksheet, and determine the mastery level of thinking skill on the work and energy subject by using PEKA-based Thinking Activity worksheet. This type of research was research & development with 4-D model (Define, Design, Develop, and Disseminate). The initial product was validated by lecturers and teacher, and revised in the first revision. The revised worksheet was used in the limited testing then performed second revision. The final product was used in extensive trial. The results of this research shows that PEKA-based Thinking Activity worksheet is in good category with average score of 4.12. The level of student mastery in thinking skills was 55% at excellent, 36% at credit and 9% at satisfactory levels.
Co-Authors Guntara, Yudi Kurniawan, Yohanes Purwoko Haryadi Santoso Suparno Suparno