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Moh. Irma Sukarelawan
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INDONESIA
Indonesian Review of Physics (IRiP)
Published by Universitas Ahmad Dahlan
ISSN : 26213761     EISSN : 26212889     DOI : https://doi.org/10.12928/irip
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology
This journal is continued version of Berkala Fisika Indonesia journal. The journal was published for the first time in 2008. The last published volume was 10 (1) 2018. The ISSN is 2085-0409 (printed version) and 2250-0465 (online version).
Arjuna Subject : Fisika dan Astronomi - Astronomi dan Astrofisika
Articles 134 Documents
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Meta-analysis of the Effect of the Discovery Model in Physics Learning on Critical Thinking Ability and Knowledge Competence of High School Students Annisa N; Asrizal A; Fatni Mufit
Indonesian Review of Physics (IRiP) Vol. 4 No. 2 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i2.4217

Abstract

21st Century Education requires students to have the competence and ability to think critically, especially in learning Physics. So we need an appropriate learning model, one of which is the discovery model. In fact, there are still many teachers who cannot choose the right learning model, so students cannot develop their competence and critical thinking skills. The solution is to analyze the effect of the discovery model on students’ critical thinking skills and knowledge competencies in terms of the type of discovery model and physics material. The articles were analyzed from 16 relevant articles originating from international and national articles. Based on the analysis that has been done, four research results were obtained. From the four research results, it is known that the discovery model in terms of the type of discovery model and physics material influences students’ critical thinking skills and knowledge competence.
Comparison of Euler and Euler-Cromer Numerical Methods for Undamped and Damped Spring Oscillation Nurul Miftakhul Janah; Fajrul Falah; Ratnawati; Ishafit; Wipsar Sunu Brams Dwandaru
Indonesian Review of Physics (IRiP) Vol. 4 No. 2 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i2.4803

Abstract

This study aimed to numerically analyze damped and undamped oscillations of a spring using the Euler and Euler-Cromer methods via Spreadsheet software. The varied parameters in this study were the damping constant, namely 0.1 (damped) and 0.0 (undamped). Various quantities analyzed in this study were position (x), velocity (v), kinetic energy (K), potential energy (U), mechanical energy (E), and phase space as a function of time (t). Iteration was done in t < 60-time steps (seconds). The results of this study indicated that when the spring experiences damping, the numerical results of x, v, K, U, E, and the phase space decrease periodically to zero due to the damping force, both for the Euler and Euler-Cromer methods. Meanwhile, for the undamped spring (zero damping constant), there was a difference in the results for the Euler and Euler-Cromer methods. For the Euler method, the resulting values ​​of x, v, K, U, E, and the phase space increased periodically with time, which was not following the actual situation. According to the simple harmonic oscillation, the Euler-Cromer method values ​​of x, v, K, U, E, and the phase space were stable over time.
Synthesis of Calcium Phosphate from Cockle Shell Loaded by Silver Nanoparticle and Its Antibacterial Activity Evaluation Yuant Tiandho; Rahmad Lingga; Evi.J Evi.J; Rifqi Almusawi Rafsanjani; Fitri Afriani
Indonesian Review of Physics (IRiP) Vol. 4 No. 2 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i2.4920

Abstract

This study aimed to synthesize calcium phosphate loaded with silver nanoparticles and evaluate its antibacterial activity. We used cockle shells waste as raw material to prepare calcium phosphate. X-ray diffraction analysis showed that the constituent phases of calcium phosphate consist of hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP). The incorporation process of silver nanoparticles on calcium phosphate was carried out in colloidal silver nanoparticles via the green-synthesis method using Citrus x microcarpa Bunge peel extract. The presence of colloidal silver nanoparticles through the green synthesis method was identified using UV-Vis spectrophotometer by the peak of the absorption band that occurred at 468 nm. The incorporation of silver nanoparticles into calcium phosphate did not significantly change the crystalline properties of HA and β-TCP. Evaluation of the antibacterial activity showed the silver nanoparticles had a strong antibacterial effect against Staphylococcus aureus, which also occurs in calcium phosphate loaded by silver nanoparticles. After being incorporated with silver nanoparticles, Calcium phosphate generally has no antibacterial effect. After being incorporated with silver nanoparticles, an inhibition zone with a diameter of about 9.8 mm can form. These results indicated that the method proposed in this study could be an alternative for developing calcium phosphate, which requires self-sterilization properties.
STEM ISCIT Learning Tools to Improve Integrative Scientific Thinking Dian Artha Kusumaningtyas; Dwi Sulisworo; Jumadi; Edi Istiyono
Indonesian Review of Physics (IRiP) Vol. 4 No. 2 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i2.5265

Abstract

Learning in the era of the new university regulations experienced a revolution in students’ learning style and teachers’ teaching style because this situation caused many changes in the learning system. Different types of learning alternatives are carried out to achieve learning that meets these conditions. Integrative STEM was selected as one of the learning models in the new order era. However, inclusive STEM learning is difficult to do without support or learning tools, especially in distance learning. Based on these needs, this research was carried out to develop support devices for the integrative STEM model in university physics class students. This research is research and development (R&D). The development model used uses a 4D development model. The 4D model is synonymous with definition, design, development, and dissemination. In this study, an assistive device model was developed in an integrative MINT learning device. The analysis results show that the development of integrative learning tools based on STEM for students is rated as good, with an average of 80%.
Development of Al-Qur'an-Based Physics Learning Media Applications to Improve Higher Order Thinking Skills and Spiritual Attitudes for Preservice Physics Teacher Lailatul Nuraini; Firdha Kusuma Ayu Anggraeni; Alex Harijanto; Sri Handono Budi Prastowo; Subiki Subiki; Bambang Supriadi; Maryani Maryani; Sutarto Sutarto; Rayendra Wahyu
Indonesian Review of Physics Vol. 5 No. 1 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i1.4268

Abstract

This study aims to develop an Android-based Al-Qur'an integrated physics learning media to improve preservice physics teachers' higher-order thinking skills and spiritual attitudes. The development of learning media uses the ADDIE model. Media and material experts assessed the feasibility of learning media through a validation questionnaire. The trial was carried out on 40 preservice physics teacher students. The validation results were analyzed using a descriptive technique. The analysis results show that the learning media developed is suitable for improving Higher Order Thinking Skills and the Spiritual Attitude of Preservice Physics Teachers. So, the Android-based physics learning media integrated with the Quran can be implemented for preservice physics teachers.
Effect of Sintering Temperature on Crystal Structure and Conductivity of the CaCO3-Doped Li4Ti5O12 Anodes from Blood Clam Shells (Anadara granosa) Marhan Ebit Saputra; Megawati Ayu Putri; Eka Febrianti; Widodo Budi Kurniawan
Indonesian Review of Physics Vol. 5 No. 1 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i1.4804

Abstract

CaCO3-doped Li4Ti5O12 was synthesized by solid-state method with sintering temperatures at 750 °C, 800 °C, and 850 °C. The source of CaCO3 was used from blood clam shells (Anadara granosa) with a content of 97.67%. The influence of sintering temperature on crystal structure and conductivity of CaCO3-doped Li4Ti5O12 are extensively studied. XRD results show there is no CaCO3 phase found, which indicates that the doping of Li4Ti5O12 with CaCO3 has been successful. The smallest crystallite size was obtained at a sintering temperature of 800 °C, which is 46.49 nm, which is beneficial for shortening diffusion length and facilitating the electron and ion transport, causing an increase in anode conductivity. The most optimal conductivity was obtained in samples with a sintering temperature of 800 °C with a conductivity of 2.46 x 10-4 S/cm. When the sintering temperature is increased to 850 °C, the particles tend to agglomerate and deteriorate the electrochemical properties.
Magnetodeposited Nickel on Cu Substrate with the Angle Variation of Magnetic Field Moh. Toifur; Effilia Allun Jaladri; Efi Kurniasari; Yuni Latifah; M. Taufiqurrahman
Indonesian Review of Physics Vol. 5 No. 1 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i1.5816

Abstract

The performance of a thin layer of Cu/Ni as a cryogenic sensor is produced by electroplating at various angles with the aid of a 200G parallel magnetic field. Liquid nitrogen (LN2) is a low-temperature medium with temperatures varying from 0oC to -200oC. The characterization includes the sensor voltage range, sensor resistance, and sensor sensitivity. Thermocouple TCA-BTA -200oC to 1400oC is used as a temperature calibrator. The results showed that all sensors could measure the LN2 temperature in the range of 20oC to -200oC corresponds to the thermocouple's ability to measure up to -200oC. Each sensor has its advantages, but the sensor produced from coating each 3 minutes sample with an angle of 90o has the largest output voltage range up to 0.058 V, and the coating at an angle of 0o with the sensitivity level as a function of T is S(T) = 0.0051 - 0.002T, while the 3 minutes coating sensor with an angle of 60o has the smallest voltage range of 0.0439 V and sensitivity (1.88 ± 0.05) V/oC.
Development of Photoelectric Effect Learning Media based on Arduino Uno Hardi Hamzah; Dewi Sartika; Muhammad Nurkhalis Agriawan
Indonesian Review of Physics Vol. 5 No. 1 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i1.5830

Abstract

This study aims to develop a photoelectric effect learning media based on Arduino Uno. The subjects in this study were students who took Modern Physics courses. The media development procedure uses the Borg and Gall model, which is limited to seven stages. The feasibility of the developed media refers to the results of the media expert's assessment, the level of practicality, and the effectiveness of the media. The test results show that the product's Planck constant of 6.62 × 10-34 J.s corresponds to the theoretical value. Three experts concluded that the learning media had a good level of feasibility to be used as an experimental tool. The level of practicality and effectiveness of the media showed good results. That is, practical and effective media to be used in experiments. So, it can be concluded that the Arduino Uno-based photoelectric effect learning media that has been developed is suitable for use in learning.
Analysis of Land and Sea Temperatures Trend During 1985-2021 Period to Understand Local or Global Warming Effect in Bengkulu City Arya J Akbar; Ashar Muda Lubis
Indonesian Review of Physics Vol. 5 No. 1 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i1.6073

Abstract

Global warming is a phenomenon where the earth's temperature rises drastically. The temperature increase causes negative impacts on the environment globally. Bengkulu City, Indonesia, is situated with a growing population and land-use change that may cause temperature rise. This research aimed to analyze the temperature change in the land and sea area of Bengkulu City. To understand the local or global factors influencing temperature changes in Bengkulu City, we also studied the correlation between land and sea temperatures. The temperature data were obtained from BMKG and NOAA PSL. Firstly, we analyzed the temperature trendlines for the last 36 years. Then we evaluated the coefficient determination (R2) value to determine the correlation between sea and land temperatures. The results show that during the last 36 years, the sea temperature is increased by 0.40 °C, while the land temperature is increased by 1.07 °C. Moreover, we found a relatively weak correlation between sea and land temperature, with a 10.7% correlation. We argued that the increased temperature in Bengkulu City land is associated with land change use and rising population in the last few decades, which means the local factor affected the land temperature changes. On the other hand, global phenomena (IOD and ENSO) influenced sea temperature changes, which means the global factor affected the sea temperature changes. The rising land temperature is relatively high; hence it is necessary to understand better what parameters are causing temperature changes that may affect the physical environment in Bengkulu, Indonesia.
Physical Quality of Cow's Milk by Exposure to Magnetic Fields Extremely Low Frequency (ELF) 300 μT and 500 μT by inhibiting Salmonella and Escherichia Coli Growth Sudarti, Sudarti; Permatasari, Elok; Ratnasari, Indri; Laili, Sherly Nur
Indonesian Review of Physics Vol. 5 No. 2 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i2.5064

Abstract

Extremely Low Frequency (ELF) magnetic field, high intensity (more than 100 µT), can suppress the growth of pathogenic bacteria, but the impact of low intensity (≤ 500 µT) needs to be proven. This study aimed to analyze the physical resistance of cow's milk exposed to a magnetic field of 300 µT and 500 µT ELF by inhibiting the proliferation of Salmonella and Escherichia Coli bacteria. Completely Randomized Design (CRD) research design. Samples were 210 bottles of cow's milk (@ 50 ml) divided into seven groups. Exposure to the ELF magnetic field intensity of 300 μT and 500 μT with exposure variations of 60, 90, and 120 minutes. Result: Exposure to an ELF magnetic field with an intensity of 500 µT for 60 minutes significantly (p < 0.05) reduced the Salmonella sp. population but not Escherichia coli. Even though the physical condition showed the color and smell of fresh milk, lumps did not appear until the 10th hour. Conclusion: exposure to the ELF magnetic field intensity of 300 μT and 500 μT has not been able to maintain the quality of cow's milk.

Page 11 of 14 | Total Record : 134

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