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All Journal Jurnal Pengelolaan Laboratorium Pendidikan Jurnal Penelitian Enjiniring Fakultas Teknik Unhas Indonesian Journal of Multidiciplinary Research (IJoMR) Indonesian Journal of Teaching in Science
Hofifah, Siti Nur
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Chemical Engineering, Chemistry & Bioengineering Education Engineering Environmental Science Mathematics Social Sciences Other

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How to Identify Misconception Using Certainty of Response Index (CRI): A Study Case of Mathematical Chemistry Subject by Experimental Demonstration of Adsorption Putri, Silmi Ridwan; Hofifah, Siti Nur; Girsang, Gabriela Chelvina Santiuly; Nandiyanto, Asep Bayu Dani
Indonesian Journal of Multidiciplinary Research Vol 2, No 1 (2022): IJOMR: VOLUME 2, ISSUE 1, 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (978.401 KB) | DOI: 10.17509/ijomr.v2i1.38738

Abstract

The purpose of this study was to identify misconceptions using the certainty of response in undergraduate students through a case study of mathematical chemistry subject by experimental demonstration of adsorption. The concept of mathematical chemistry was conveyed to students by using an explanation video. The video also directs students to do practical experiments on adsorption. The data obtained can be used to determine the isotherm adsorption model that fits with their experimental phenomena. Students analyze the data obtained by using their understanding of the mathematical chemistry concepts that have been taught. Misconceptions on students were analyzed using pretest-posttest by giving 20 questions followed by the guess level (CRI). Based on the answers given, students' understanding of the concepts being taught can be identified as understanding the concept, lucky guess, do not understand the concept, and misconceptions. This research can be used as a reference to identify misconceptions in students and can be applied in various subjects.
Production of Brake Pad from Epoxy Resin: From Polymerization Concept to the Experiment with Analysis of Mechanical Properties Nandiyanto, Asep Bayu Dani; Fiandini, Meli; Al Husaeni, Dwi Novia; Ragadhita, Risti; Hofifah, Siti Nur
Jurnal Penelitian Enjiniring Vol 25 No 2 (2021)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.112021.05

Abstract

The purpose of this study was to determine the effect of variations in the use of catalysts on the performance of brake pads. The performance testing is compressive strength and puncture strength. The resin is formed from a mixture of Bisphenol A-epichlorohydrin and cycloaliphatic amine. Based on the results of the study, it was found that brake pads with samples B and C had better performance. The hardness values of samples A, B, and C are 307.4; 331.1; and 334.3 N, respectively. The ratio of resin and catalyst mixture affects the performance of the brake pad. The more catalysts added, the faster the hardening process. It is hoped that this research can be the basis for developing brake pads.
The Effectiveness of the Practicum Video Guide on Distance Learning in Improving Biology Learning Outcomes in Enzyme Content Hofifah, Siti Nur; Sumiati, S.
Indonesian Journal of Teaching in Science Vol 3, No 2 (2023): IJOTIS: September 2023
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijotis.v3i2.62905

Abstract

This study aims to analyze the effectiveness of video practicum guides on distance learning in improving biology learning outcomes on enzymes. This research was conducted with the stages of problem identification, planning, action (cycles I-III), observation, and reflection. All stages of learning were carried out in distance learning (online). The research was conducted on 35 students at a high school in Bandung. The assessment instrument in this study consisted of observation sheets and students' cognitive tests at the end of the cycle. The results of observations and cognitive tests of students showed that the average score for the biological value of the enzyme material had increased. There was a significant increase in each cycle, showing the success of the learning strategy by listening to video practicum. Student learning outcomes were also influenced by the teacher management in carrying out the online learning process. This research was expected to provide new information regarding the use of video media in distance learning.
“ANKER” Video Prosedur K3 untuk Meningkatkan Kesadaran Kerja di Laboratorium Mikrobiologi Putra, Renardi Erwinsyah; Hofifah, Siti Nur; Maemunah, Iin; Purwanti, Sri Tri; Barmana, Doni
Jurnal Pengelolaan Laboratorium Pendidikan Vol.6, No.2, Juli 2024
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.6.2.133-144

Abstract

This research aims to examine the production of occupational health safety (OHS) videos in microbiology laboratories. The procedure used is "ANKER", which is an acronym for work analysis and reconstruction from making OHS videos used in workshop activities to increase work awareness in the microbiology laboratory. The OHS video analysis score using the VEE diagram obtained 38 points on a scale of 100. The work procedure was carried out by testing the OHS video with 37 workshop participants. On the basis of obtaining the scores above, video reconstruction needs to be carried out which includes adding Focus Questions, clarifying knowledge claims, adding data recording processes and activities. The results of interviews with respondents showed an incompatibility between the music and the storyline so that the background music in the video needed to be replaced. After the reconstruction process using the VEE diagram, a score of 94 points on a scale of 100 was obtained. Thus, the use of the "ANKER" procedure using the VEE diagram can be used to increase awareness of working in a microbiology laboratory. Respondents were of the opinion that K3 information via video was very helpful in increasing awareness of working in the laboratory. Submission of information about K3 must be carried out before carrying out laboratory activities and after carrying out laboratory activities as part of the practical evaluation  
Co-Authors Al Husaeni, Dwi Novia Al-Obaidi, Abdulkareem Sh. Mahdi Asep Bayu Dani Nandiyanto Barmana, Doni Budiman, Bentang Arief Fiandini, Meli Girsang, Gabriela Chelvina Santiuly Maemunah, Iin Purwanti, Sri Tri Putra, Renardi Erwinsyah Putri, Silmi Ridwan Ragadhita, Risti S. Sumiati Triawan, Farid