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All Journal SAGA: Journal of Technology and Information Systems Lontar Physics Today
Umi Pratiwi
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Jenderal Soedirman University, Purwokerto, Indonesia
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Library & Information Science Physics

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 1 
The Elastic Properties of Objects by Determining Young's Modulus for the Characterization of Metal Raw Materials Using a Speed Sensor Encoder and a Load Cell Sensor Umi Pratiwi; Wahyu Tri Cahyanto; Sunardi
SAGA: Journal of Technology and Information System Vol. 1 No. 2 (2023): May 2023
Publisher : CV. Media Digital Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1344.722 KB) | DOI: 10.58905/saga.v1i2.60

Abstract

The unique characteristic of a metal material can be determined from the value of Young's modulus which represents the ability of the material to deform in response to an external force given to the material. This study aims to determine the value of Young's modulus for three metal wires (copper, nickel, and steel) and the percentage of measurement errors using a self-designed Young's modulus kit equipped with a load cell sensor and speed sensor encoder. The measurement of Young's modulus was carried out in five experiments without any variation in diameter (the diameter was fixed and the same for all metals), and the results were compared with the reference values. The results showed that the values of Young's modulus for copper, nickel, and steel wires were 11.74 x 1010 N/m2, 21.63 x 1010 N/m2, and 20.84 x 1010 N/m2, respectively. The difference between the measured values and the reference values for Young's modulus for copper, nickel, and steel wires were 6.7%, 3.0%, and 4.18%, respectively. The small differences between the measured values and the reference values indicate that the measurement approach approximates the reference values and can be used to support other measurements involving Young's modulus values of a metal material
Pengaruh Metode Eksperimen Dengan Model Inkuiri Terbimbing Terhadap Kemampuan Berpikir Kreatif Peserta Didik Pada Pembelajaran Fisika Nuning Rohmantika; Umi Pratiwi
Lontar Physics Today Vol 1, No 1 (2022): Februari 2022
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/lpt.v1i1.10340

Abstract

Research has been carried out on the effect of using experimental methods using guided inquiry learning models on students' creative thinking skills in physics learning. The purpose of this study was to determine how much influence the experimental method combined with the guided inquiry learning model had on the creative thinking abilities of MA Al-Iman Bulus Purworejo students and to determine the effectiveness of learning physics through experimental methods on the subject of uniformly changing straight motion. Class X Mathematics and Natural Sciences became the population in this study, while the sample was class X MIPA 2 as many as 35 students. The technique used to collect data was in the form of a test method. Then the accumulated data is calculated using N-Gain and the data analysis used is the normality test and the t-test. The results of the N-Gain calculation are 0.44 and are included in the medium category. Normality test results obtained Asymp. Sig. (2-tailed) > 0.05. The results of data analysis through t-test obtained the results of Sig. (2-tailed) 0.000 < 0.05, so from this study it was concluded that there was an effect of the experimental method using the guided inquiry learning model on the creative thinking ability of students. Keywords: experimental method, guided inquiry, creative thinking ability
Implementasi Metode Pra-Experimental Designs Untuk Meningkatkan Sikap Ilmiah Dan Literasi Sains Pada Praktikum Fisika Materi GLB Siswa Ma Al-Iman Bulus Purworejo Endang Yulyanti; Umi Pratiwi
Lontar Physics Today Vol 1, No 1 (2022): Februari 2022
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/lpt.v1i1.10377

Abstract

Education is very important in one's life. A student must have a good scientific attitude so that the learning process runs smoothly. In the learning process doing physics practicum so that the material is better understood. This practicum was carried out using the Pre-Experimental Designs method. This method is used to improve the scientific attitude and scientific literacy of students who are still low through physics practicum. This practicum was carried out on offline uniform motion material (GLB) in class X MIPA 1 MA Al-Iman Bulus Purworejo with 35 students and divided into 4 groups. The results of the research in class X MIPA 1 MA Al-Iman Bulus Purworejo showed that the scientific attitude of the students was good, namely in terms of curiosity, discipline, responsibility and cooperation. The results showed that there was an increase in the results of the pretest and posttest carried out before and after the practicum. The average pretest score obtained is 7.1 8.0 then the posttest score is 8.1 9.0. The data proves that practicum activities using the Pre-Experimental Designs method can improve the scientific attitude and scientific literacy of class X MIPA 1 MA Al-Iman Bulus Purworejo students.Keywords : Scientific Attitude, Pre-Experimental Designs, Scientific Literacy
Praktikum Pengukuran Menggunakan Model Discovery Learning Untuk Meningkatkan Kemampuan Literasi Sains Peserta Didik di SMK Muhammadiyah Kutowinangun Tariska Widiastuti; Umi Pratiwi; Siska Desy Fatmaryanti; Yusro Al Hakim
Lontar Physics Today Vol 1, No 1 (2022): Februari 2022
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/lpt.v1i1.10456

Abstract

This study aims to improve the scientific literacy of students in the measurement practicum. The research method used is the experimental design method of pre experimental design (nondesigns) using One-Group Pretest-Posttest Design to determine scientific literacy ability. The measured scientific literacy ability consists of 3 aspects, namely the concept of science, the process of science, the situation and the realm of application. The research activity was attended by 28 students of class X TKRO-F. The learning model used is discovery learning. Discovery learning is divided into six stages, namely stimulation or giving stimulation, problem identification, data collection, data processing, verification, and generalization or conclusions. The research instrument uses pretest questions which are carried out at the beginning of the practicum activity and the posttest is carried out after the practicum. The results of this study are able to measure success in carrying out physics practicum. Based on the increase in the value of the scientific literacy test results for the Measurement material, it was significantly 10.4 points, while the percentage of students who completed it increased by 2.52% and there was a decrease in the number of students who did not complete it by 2.52%. The increase in scientific literacy skills calculated using the N-gain is 0.32 in the medium category. Based on the research, it can be concluded that the discovery learning model can be used to improve students' scientific literacy skills.Keywords: discovery learning, scientific literacy, pre test, post test, practicum
Co-Authors Endang Yulyanti Nuning Rohmantika Siska Desy Fatmaryanti Sunardi Tariska Widiastuti Wahyu Tri Cahyanto Yusro Al Hakim