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All Journal Jurnal Fisika FLUX Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Wahana Fisika : Jurnal Fisika dan Terapannya
Mat Daud, Anis Nazihah
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Astronomy Earth & Planetary Sciences Education Engineering Materials Science & Nanotechnology Physics

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Sistem Karakterisasi Material Terkomputerisasi Untuk Material Berpori Maiyena, Sri; Mat Daud, Anis Nazihah; Ayop, Shahrul Kadri
Wahana Fisika Vol 9, No 2 (2024): Desember
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v9i2.69912

Abstract

Penelitian ini bertujuan untuk mengembangkan sistem karakterisasi material terkomputerisasi untuk mengukur sifat material pada material berpori menggunakan teknik perendaman pulsa-gema. Sistem antar muka grafis yang dikembangkan menyediakan platform yang mudah digunakan yang terdiri atas akuisisi sinyal, grafik sinyal, parameter input dan sifat material. Sistem ini digunakan untuk menentukan sifat akustik (kecepatan longitudinal dan impedansi akustik) dan sifat elastis (modulus Young, modulus geser, modulus bulk, modulus longitudinal dan konstanta Lamé). Sampel yang digunakan berupa PMMA yang terdiri atas sampel tidak berpori dan sampel berpori. Sistem ini divalidasi menggunakan sampel yang tidak berpori. Persentase kesalahan pengukuran sistem adalah 8,36% dibandingkan dengan nilai referensi, yang menunjukkan tingkat akurasi yang wajar. Hasil penelitian menunjukkan bahwa sampel yang tidak berpori secara umum menunjukkan sifat akustik dan sifat elastis yang lebih tinggi daripada sampel yang berpori. Kemampuan sistem untuk menentukan sifat material secara akurat dengan persentase kesalahan yang dapat diterima menunjukkan bahwa sistem ini dapat menjadi alat yang berharga dalam pengujian material dan aplikasi kontrol kualitas.
Impact of Frequency Variations in Ultrasonic Transducers on Material Properties Maiyena, Sri; Ayop, Shahrul Kadri; Mat Daud, Anis Nazihah
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 2 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i2.17166

Abstract

Research has been carried out to determine material properties using ultrasonic waves. The aim of the research is to see the effect of variations in ultrasonic transducer frequency on material properties, material mechanical properties and material acoustic properties. The ultrasonic technique used is based on the pulse echo technique. The samples used were steel with a thickness of 2.5 cm, aluminum with a thickness of 2 cm and 1.8 cm and PMMA with a thickness of 1.5 cm, 1 cm and 0.2 cm. There are three variations of transducer frequency used, namely 2.25 MHz, 5 MHz and 10 MHz. The mechanical property of the material that will be determined is the elastic modulus. The acoustic properties of the material to be determined are longitudinal velocity, attenuation coefficient and acoustic impedance. The results showed that variations in transducer frequency did not affect the values of elastic modulus, longitudinal velocity and acoustic impedance. However, the use of transducer frequency variations affects the attenuation coefficient value.
Development Worksheet Integrated PhET Simulation to Improve Critical Thinking Skills in Junior High School Rahmat*, Anggi Datiatur; Wilujeng, Insih; Kuswanto, Heru; Mat Daud, Anis Nazihah; Saepuzaman, Duden
Jurnal Pendidikan Sains Indonesia Vol 12, No 1 (2024): JANUARY 2024
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v12i1.34742

Abstract

Integrating technology has a positive impact on science learning. Technology multiplatform can be used as a didactic tool is physics education technology (PhET). This study aims to develop worksheet integrated PhET simulations. The development adopted the 4D model. The designed activity aims to engage students in critical thinking. The instrument for measuring critical thinking consists of 5 questions based on the critical thinking aspect: interpretation, analysis, evaluation, inference, and explanation. Content and media experts and two practitioners validated the media. The validation result shows a V index between 0.80 - 1.00 for all aspects with very high categories. The readability test was administered to 20 students and gained very good results. The effectiveness test was conducted on two different classes. The experiment class uses a worksheet integrated PhET, while the control class uses a worksheet without PhET. Students in the experiment class had higher critical thinking skills scores than those in class control. It can be interpreted that using worksheet-integrated PhET affected students' critical-thinking skills. The results of this study can be used as a reference for integrating technology into science learning
Co-Authors Ayop, Shahrul Kadri Duden Saepuzaman, Duden Heru Kuswanto Insih Wilujeng Rahmat*, Anggi Datiatur Sri Maiyena