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All Journal Jurnal Riset dan Kajian Pendidikan Fisika Jurnal Pendidikan Fisika Science and Technology Indonesia Indonesian Review of Physics (IRiP) DIFFRACTION: Journal for Physics Education and Applied Physics Jurnal Penelitian Pendidikan Fisika
Ishafit Ishafit
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Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology Physics Social Sciences

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Journal : Indonesian Review of Physics (IRiP)

 1 
Development Student Worksheet in the Topic of Regular Circular Motion with Blended Learning based Edmodo as Learning Motivations for Student Susilawati, Susilawati; Ishafit, Ishafit; Setyawati, Eni
Indonesian Review of Physics (IRiP) Vol 2, No 2 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (477.938 KB) | DOI: 10.12928/irip.v2i2.1006

Abstract

The research aims to develop learners ' worksheets on the subject of circular motion with the Edmodo based blended Learning as well as the motivation to learn learners. The test subjects in this study were vocational school grade of  X students. The model used is the ADDIE development model, which includes five stages: Analysis, Design, Development, Implementation, and Evaluation. To know the feasibility of media validation. To know the feasibility of media done validation. This validation is in the form of a poll with predefined criteria and indicators. From the development of student worksheet conducted an expert test of materials, media experts and users with a percentage of 79.68%, 77.27% and 83.62% with that percentage, then the student worksheet with blended learning based Edmodo As the motivation to learn learners in the categorized worthy as a learning media.
Determination of Fill Factor and Efficiency in Solar Cell Type (99 × 69) mm2 with Arduino Uno R3 Based Drive assisted by Logger Pro 3.14.1 Hamzah, Hamzah; Toifur, Moh.; Ishafit, Ishafit
Indonesian Review of Physics (IRiP) Vol 2, No 2 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (532.621 KB) | DOI: 10.12928/irip.v2i2.1258

Abstract

Abstrak- The study about fill factor and efficiency solar cell have been done with an automatic drive machine that rotates the surface of the solar cell following the movement of the light source from 0° up to 90° compared without automatic drive.  The test results are then implemented to determine the fill factor and efficiency in variations in light intensity. In this study, polycrystalline solar cell type (99 × 69) mm2, the Philips 100W/220V light bulb at a distance of 18 cm and the driving machine is controlled through an Arduino Uno R3 microcontroller. Data acquisition of current and voltage is carried out with the help of DCP-BTA current and VP-BTA voltage probes that are connected to the mini labquest transducer and displayed to a computer through loggerpro software. The result show that it has been successfully designed an automatic driver of a solar panel (99 × 69) mm2  with an Arduino Uno R3 microcontroller and a logger pro software as data acquisition software. The using solar cell automatically driven can improve the accuracy and precision of current and voltage readings so the fill factor might be increased up to 10% while the efficiency of solar cells does not change. Variations in light intensity can increase the fill factor and efficiency of solar cells. Fill factor and efficiency have an exponentially relationship to light intensity.
The Development of Worksheet Based on Guided Discovery Learning Method Helped by PhET Simulations Interactive Media in Newton's Laws of Motion to Improve Learning Outcomes and Interest of Vocational Education 10th Grade Students Nurahman, Arip; Widodo, Widodo; Ishafit, Ishafit; Saulon, Butch O.
Indonesian Review of Physics (IRiP) Vol 1, No 2 (2018)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.28 KB) | DOI: 10.12928/irip.v1i2.776

Abstract

This research was aimed to produce students worksheet (LKPD) based on PhET Interactive Simulations Software in cognitive through the application of physics-based guided discovery learning model that is devoted to the concept of Newton's Law of Motion. Guided Discovery-based approach is expected and is believed to develop students' skills in various aspects of one study that showed achievement levels mastery of physics students after participating in the learning process under the expected educational purposes. Researchers conducted a study on the process of learning physics for the discovery-oriented at vocational senior high school students in Newton's law of motion with R&D. Subjects were students of class X TKRO in the first semester of the academic year 2018-2019 in vocational high school in Ciamis, West Java Province as many as 35 students. Data collected through tests, observations and interviews. 
Effect of the Magnetic Force on Ferrite Pendulum Oscillation Parameters: Parametric Analysis on Ferrite Pendulum Adi, Rusli; Toifur, Moh; Ishafit, Ishafit; Jaafar, Rosly
Indonesian Review of Physics (IRiP) Vol 3, No 1 (2020)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v3i1.1836

Abstract

The magnitude of the damping force of the mathematical pendulum swinging on a medium is usually proportional to the speed of the pendulum. In this research, the pendulum oscillation parameters oscillating on an air medium under the influence of a magnetic field of 1.8 G will be investigated. In the initial stage, the effect of the magnetic force on the damping coefficient of ferrite pendulum oscillations with an initial deviation of 15 degrees observed. Furthermore, the study continued with varying the angle of deviation from 5 degrees to 25 degrees. The results of the data fitting amplitude (xi) at various swing times (ti) are using to analyze the effect of the angle of deviation on the maximum amplitude. The results showed that for the deviation angle of 15o the coefficient of damping of the medium affected by the magnetic force was 0,0022 greater than the coefficient of air damping 0,00006. It affects the amplitude, which decreases faster than the pendulum amplitude without the influence of magnetic force. Variation in the angle of deviation also affects the amplitude of the pendulum. In the deviation angle below 10, the pendulum motion is more influenced by the magnetic force, whereas in the deviation above 10, the pendulum motion is more dominated by gravity.
Co-Authors Adi, Rusli Apik Rusdiarna Indra Praja Dandan Luhur Saraswati, Dandan Luhur Dwi Sulistyaningsih Eko Sujarwanto hikmatiar, hamzarudin Jaafar, Rosly Kusiana, Rani Mahmudah, Ifa Rifatul Maulinda, Kurnia Risca Mentari Eka Wahyuni Moh. Toifur Nanang Suwondo Nurahman, Arip Okimustava Okimustava Purwadi Purwadi Rachmad Resmiyanto Raharja, Endra Putra SATRIYAS ILYAS Saulon, Butch O. Setyawati, Eni Susilawati, Susilawati Widodo Widodo