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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 114 Documents
 1   2   3   4   5 
Characterization of Activated Charcoal Oil Palm (Elaeis Guineensiss Jacq) Shell Waste using SEM and FTIR: Effect of Activation Temperature Syidiq, Rasyid; Yusran, La Ode; Anas, Muhammad; Fayanto, Suritno
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 (1256.483 KB) | DOI: 10.12928/irip.v2i2.812

Abstract

This study aims to determine the structure of morphology and functional groups from activated charcoal for palm oil waste with variations in activation temperature. The process of two stages: the carbonation and activation stage. Carbonation process using a pyrolysis reactor at a carbonation temperature of 200oC -400oC for 6 hours. Then, the sample activated at a temperature of 700 °C, 750oC, 800oC, and 850 °C. Samples were characterization using SEM and FTIR. SEM analysis results show the largest pore size at a temperature of 850 oC with a diameter of 48.3 nm, and the lowest temperature was 700 °C with a capacity of 35.3 nm. Activated charcoal from oil palm shell waste at mesopore size. Next, FTIR analysis results show wave numbers 2165,18 cm-1, 1554 cm-1, 1030,76 cm-1 dan 424,11 cm-1.  The removal of some absorption bands and  the formation of new absorption bands, caused by the activation temperature
Front Matter IRiP Vol. 1 No. 1 Raharja, Endra Putra
Indonesian Review of Physics Vol 1, No 1 (2018)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (149.804 KB) | DOI: 10.12928/irip.v1i1.845

Abstract

Measurement Eccentricity the Moon’s Orbit with Image Analysis Technique by Using Tracker Software Tanzilla, Ricka; Jauhari, Ishafit; Pramudya, Yudhiakto
Indonesian Review of Physics (IRiP) Vol 1, No 1 (2018)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (390.132 KB) | DOI: 10.12928/irip.v1i1.258

Abstract

One of the interesting physical phenomenon to be studied is about eccentricity of the Moon's orbit on the movement of the Earth and the Moon as explained in Kepler's Law. In order to explain the phenomenon,several research has been done to determine the measurement accuracy of Moon disk diameter using Trackers and to know the result of the eccentricity value in the application of Kepler's Law. This research can produce eccentricity values accordance with the application of Kepler’sLaw. The research method used is Image Analysis Techniqueassisted with Tracker. The result of this research shows that the eccentricity value obtained is 0.07 ± 0.01. This is in accordance with Kepler's first Law which stated that orbits of each planet and satellite is an ellipse and has an eccentricity value of 0 <e <1. The value of eccentricity obtained has accuracy of 22%,if it compared with the actual value.Whereas, if it compared with the value of ephemeris then the value of accuracy is 8%.
Development of The Conception of Mechanical Energy Conservation with Interactive Lecture Demonstration Method using Simple Experiments for Grade 7 Students Wijanarka, Willi Anindita; Zai, Julius; Santi, Winda Noor; Rahmawati, Laifa; Rameli, Mohd Rustam Bin Mohd
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 (401.992 KB) | DOI: 10.12928/irip.v2i2.1275

Abstract

The purpose of this research is to develop a student's conception of mechanical energy conservation with the Interactive Lecture Demonstration method. The participants consisted of 19 students of class 7E SMP Muhammadiyah 1 Mlati in 2018/2019 academic year. The analysis of the student's sheet prediction showed that most students do not understand the conception of mechanical energy conservation. After learning applied, it is known that all students have understood the influence of the height of the object on potential energy, 18 of them have understood the influence of the mass of the object on potential energy. While students' understanding of changes in mechanical energy when objects fall and the influence of mass on kinetic energy has increased slightly. Through the Wilcoxon signed-rank test, it was concluded that there was an effect of the use of interactive demonstration methods on student learning outcomes in the matter of mechanical energy conservation conceptions.
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
Analysis of metacognition difficulties in problem-solving static fluid material in term of Hippocrates – Galenus personality type Setyawati, Eni; Susilawati, Susilawati; Sulisworo, Dwi
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 (494.014 KB) | DOI: 10.12928/irip.v1i2.780

Abstract

Describing student's metacognition difficulties and thinking the process in problem-solving static fluid material in each melancholic, sanguinic, phlegmatic, and choleric (Hippocrates - Galenus) personality type. This data analysis method uses a Likert scale as a measurement scale. The data analysis technique used was grouping data into four categories: Understanding The Problem, Devising A Plan, Carrying Out The Plan, Looking Back. The cause of students' metacognition difficulties caused by a lack of understanding the concept of physics, knowing symbols, formulations, notations, and calculations that will be done in each problem solving, and lack of understanding strategies in problem-solving. Students who had a melancholic, sanguinic, choleric personality type were students who had metacognition difficulties when understanding and solving the problem, and also had problems in considering strategies and realizing the use of using strategy. Students who had the Phlegmatic personality type were able to understand the problem by looking at the problem and then making an image so that it can change the information into the form of physics.  
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.
Front Matter IRiP Vol. 1 No. 2 Raharja, Endra Putra
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 (148.905 KB) | DOI: 10.12928/irip.v1i2.846

Abstract

Architecture of Atwood Machine Props with Sensor-based Passive Infrared Saraswati, Dandan Luhur; Putri, Delia Achadina
Indonesian Review of Physics (IRiP) Vol 1, No 1 (2018)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.799 KB) | DOI: 10.12928/irip.v1i1.244

Abstract

The aim of this research is to develop Atwood machine propswith sensor-based PIR (Passive Infrared) to determine the acceleration value of earth gravity. This type of research is an experiment conducted in the physics laboratory of Universitas Indraprasta PGRI. Atwood machine was developed by using PIR (Passive Infrared) sensors to detect the movement of the objects used. Based on the trialof the result of the data analysis experiment tool, the acceleration of gravity was obtained (9.87 ± 0.08) m/s2. Whereas the value of acceleration of gravity in the literature is 9,80665 m/s2. The obtained results shows that the acceleration of gravity obtained in this research is not much different from the acceleration value of gravity  found in the literature so that Atwood machine tool that is developed by using PIR sensor is recommended to be one alternative tool in determining the acceleration of earth gravity.
Cover IRiP Vol. 2 No. 2 IRiP, IRiP
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 (7541.787 KB) | DOI: 10.12928/irip.v2i2.1458

Abstract

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