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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 7 Documents
 1 
Search results for , issue "Vol 2, No 1 (2019)" : 7 Documents clear
Investigating The Effects of Activation Temperature on The Crystal Structure of Activated Charcoal From Palm Bunches (Arengga Pinnata Merr.) Mongkito, Vivi Hastuti Rufa; Anas, Muhammad; Bahar, Wisda Puspita
Indonesian Review of Physics (IRiP) Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.827 KB) | DOI: 10.12928/irip.v2i1.818

Abstract

This research aims to determine the effect of activation temperature the crystal structure of activated charcoal. The material used activated charcoal bunches (Arengga Pinnate Merr). The process of making activated charcoal divided into two, namely the carbonization stage at a temperature of 250- 400 oC and the activation stage at a temperature variation of 600 - 800 ÌŠC. To find the crystal structure, the sample characterized by X-Ray Diffraction. The results of analysis the dominant elements diamond before activation with a percentage of 90.2% and an orthorhombic crystalline structure, where the lattice parameter a = 4.12700 Ã…; b = 4.93700 Ã…; c = 4.81900 Ã…. Peak Carbon has a hexagonal crystal structure in all temperature variations. Peak Graphite an orthorhombic crystal structure and at a temperature of 700 oC a hexagonal crystal structure formed. Therefore, giving temperature variations the activated charcoal of the bunches affects the structure of the formed Crystal. Wherein increasing the activation temperature, the crystal structure that forms look more amorphous marked by a widening diffraction peak intensity decreased crystals
Flipped Classroom As a Millenial Teaching Model Astuti, Irnin Agustina Dwi; Bhakti, Yoga Budi; Sumarni, Ria Asep; Sulisworo, Dwi; Toifur, Moh.
Indonesian Review of Physics (IRiP) Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.763 KB) | DOI: 10.12928/irip.v2i1.811

Abstract

This study is a literature review. The flipped classroom is the latest pedagogical model that has the potential to change the current traditional way of teaching. Flipped classroom emphasizes on learning activities that promote critical thinking and motivation among the students with the assistance of technology. The flipped classroom allows educators to move from ‘the sage on the stage’ to ‘the guide on the side. The basic and simplest form of flipped classroom is students are expected to watch digital resources prior to class. The students are then required to come prepared for class and perform hands-on activities that are related to the digital resources. The digital resources can be in any form such as video, audio or the internet. This allows teachers to spend more time with their students to carry out in class activities and allow immediate response to students’ needs. Student feedback on this pedagogy was generally very positive with many respondents considering it effective and helpful for learning. One of the biggest advantages mentioned by students is that they had the option to watch each video lecture as many times as required to be prepared for class.
Variation of Mixed Banana peel Substrate and Cow Dung in Biogas Pressure as a Learning Source for Renewable Energy Sources Puspitawati, Puspitawati; Riswanto, Riswanto; Suseno, Nyoto
Indonesian Review of Physics (IRiP) Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (176.078 KB) | DOI: 10.12928/irip.v2i1.855

Abstract

The supply of world energy resources is increasingly depleted. The abundance of cow manure and banana peel can cause environmental pollution. It can be used as raw material for biogas because both materials have a high methane gas ratio. This research is an experiment with six variations in the amount of mixture in each experiment. Results of the research on gas pressure and the best biogas production results using 1-litre banana peel substrate and 4-litre cow dung. Data shows that the gas pressure is faster and is greater when the pH of the mixture is acidic 6.2, the mixture is thick green and has a strong odour. Gas pressure on day 20 is obtained by 106421 Pascal. The average value of the results of the validation of the learning resources of the three aspects of an assessment is 82.3%; it shows that the poster can be used as a learning resource.
Cover IRiP Vol. 2 No. 1 IRiP, IRiP
Indonesian Review of Physics Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (627.792 KB) | DOI: 10.12928/irip.v2i1.1236

Abstract

An Experiment Design for Determining the Volume of Traditional Eucalyptus Oil with Variations in Fluid Flow Speed Siregar, Nur Hamida; Toifur, Moh.; Pramudya, Yudhiakto
Indonesian Review of Physics (IRiP) Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1331.515 KB) | DOI: 10.12928/irip.v2i1.909

Abstract

This study aimed to determine the volume of traditional eucalyptus oil from distillation with variations in fluid flow velocity. The method of distillation was distillation with water (water distillation). The material was eucalyptus leaves. To determine the volume of eucalyptus oil produced by distillation, the distillation device was set at the height of the condenser to the source of flow fluid, which was at an altitude of 15 cm, 25 cm, 35 cm, 45 cm, and 55 cm. Variation in the height of the condenser would affect the fluid flow rate. The faster the fluid flow rate, the greater the convection coefficient so that it increased the heat transfer rate. This results in greater volume (capacity) of oil produced. From these experimental results, most volumes of eucalyptus oil obtained from the distillation was obtained at 55 cm of the height of condenser with 3.6 mLof oil volume.
Front Matter IRiP Vol. 2 No. 1 IRiP, Indonesian Review of Physics
Indonesian Review of Physics Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (62.013 KB) | DOI: 10.12928/irip.v2i1.1366

Abstract

An Analysis of Graduate Students’ Conceptual Understanding in Heat and Temperature (H&T) Using Three-Tier Diagnostic Test Sukarelawan, Moh Irma; Jumadi, Jumadi; Rahman, Nurulhuda Abdul
Indonesian Review of Physics (IRiP) Vol 2, No 1 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.189 KB) | DOI: 10.12928/irip.v2i1.910

Abstract

There have been many studies that investigate H&T misconceptions among students in Indonesia but the respondents are usually limited to senior high school students. This study aims to analyse the conceptual understanding in H&T concepts of Masters of Physics Education students with a focus on identifying their misconceptions.The study employs the survey research design and data were collected using a three-tier diagnostic test. Twelve Masters of Physics Education students who are enrolled in one of the private universities in Yogyakarta City took part in the study. They were selected using the convenient sampling technique. Data on conceptual understanding involve both quantitative and qualitative data. As such, the data was analysed based on the percentage of student response patterns. Results showed that the majority of students (62.5%) have some form of misconceptions about the concepts of H&T and only 22.9% hold the scientifically accepted conceptions. The most common misconception held by the students is that both H&T depend on the material of an object. Other descriptions of conceptual understanding are False Positive (4.2%), False Negative (4.2%), and Lack of Knowledge (6.2%). Interestingly, none of the students made a lucky guess in responding to the test items. We conclude that the pattern in conceptual understanding specifically that of misconceptions are ubiquitous regardless of the level of study. Years of learning have failed to address misconceptions among students even at the graduate level. This result has implications on how learning should be designed to actively resolve the issue of misconceptions among students.  

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