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All Journal Techno: Jurnal Penelitian International Journal on Teaching and Learning Mathematics
Suryani Taib
Universitas Khairun
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Education Mathematics

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The excess of Kahoot for pre-service teacher as an evaluation tool Nurma Angkotasan; Wilda Syam Tonra; Suryani Taib
International Journal on Teaching and Learning Mathematics Vol 2, No 1 (2019): June (This issue published papers with authors/co-authors from 5 universities/in
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/ijtlm.v2i1.9115

Abstract

Technology-based instrument is one of the main factors in improving the quality of learning in the classroom. The purpose of the study was to see pre-service teacher' response using  Kahoot as evaluation tool. This study was carried out on third year students in  UniversitasKhairun. The study employed a questionnaire that consists of 15 items about the excess of Kahoot. A total of 23 subjects participated in this study. The students highly perceived Kahoot as a game that can increase self-confidence, a fun game, interesting game, and the most useful tools to be used later when the students become teacher
Crystal Structure and Magnetic Susceptibility of Iron Sand From Pangeo Village, Morotai Jaya Subdistrict as The Cathode of Lithium-Ion Batteries Rahim Achmad; Suryani Taib; Rohima Wahyu Ningrum
TECHNO: JURNAL PENELITIAN Vol 11, No 2 (2022): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i2.5562

Abstract

Morotai Island has a wealth of iron sand which is a natural resource in Morotai Jaya District, Pangeo Village. The utilization of iron sand is still for local community building materials. The purpose of this study was to determine the structure and magnetic susceptibility of iron sand as a basic material for cathode materials in the manufacture of lithium-ion batteries (LIB). The research sample was taken randomly, then it was prepared in the laboratory to obtain dry-phase iron sand. After being tested using an XRD tool, namely samples A, E, and I, it was found that there was a lot of Fe3O4 contained in iron sand. The diffraction peaks indicate Fe3O4 material with an inverse spinel structure. Sample A is the most crystalline compared to sample I. Sample E has the lowest diffraction peak pattern due to the dominant mineral hematite (Fe2O3) 70.31%. The value of the BSM test obtained the greatest magnetic susceptibility of 82867.54x10-8m3 /kg. The smallest is in sample J with a value of 13186.98 54x10-8m3 /kg because during synthesis it is slightly attracted by magnets and the color is not too black which mixes a lot with other materials. In addition, this relationship is directly proportional to sample E which contains the magnetic material Fe2O3 of the characterization of 70.31. The range of magnetic susceptibility values in samples A to L is in the interval (46 – 80,000) x 10-8m3/kg, and (20,000 - 110,000) x 10-8m3/kg. Based on this interval, both magnetic and mass susceptibility of each iron sand sample contained ilmenite (FeTiO3) particles in the antiferromagnetic group and magnetite (Fe3O4) in the ferromagnetic group.
Co-Authors Nurma Angkotasan, Nurma Rahim Achmad Rohima Wahyu Ningrum Tonra, Wilda Syam