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All Journal Jurnal Pembelajaran Sains Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram
Noer Af'idah
Hasyim Asy'ari University
Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Mathematics Physics Other

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STUDENTS’ POST-CLASS ACTIVITY AND LEARNING ACHIEVEMENT USING COOPERATIVE MODEL OF STUDENT TEAMS ACHIEVEMENT DIVISIONS ON OSCILLATION AND WAVE TOPIC Roudhoutul Aulia Rochim; Nur Kuswanti; Noer Af'idah
Jurnal Pembelajaran Sains Vol 4, No 1 (2020)
Publisher : Prodi Pendidikan IPA FMIPA Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.507 KB) | DOI: 10.17977/um033v4i1p9-15

Abstract

Science learning was still dominated by the lecture model. Consequently, students were less active and difficult in the learning process. The difficulty was caused by the low teacher ability to manage it so that the learning was less effective and interesting. As a result student’s interest and learning achievement in learning science was low. Therefore, a learning model is needed to support student mastery. One of them was the cooperative learning model of student teams achievement divisions. This research aimed to describe the activities and student learning outcomesafter learning using a cooperative learning model of student teams achievement divisions on Vibration and Wave. This study was a descriptive research with a quantitative approach. It used One-Shot Case Study. The Subjects of this study were students of class VIII of State Junior High School 3 Jombang consisting of 30 students. Student activities were observed by the student activities sheet. Learning outcomes were determined based on mastery of students and mastery of learning indicators on minimal mastery criteria. The results of the research showed that: (1) Studentactivities at the first and second meetings reached 89,5% with very good criteria, (2) Student learning outcome reached 77% while the learning indicator value got 86,5 with mastery category.
Barium M-Hexaferrite BaFe12O19 Based on Magnetic Properties and Microwafe Absorption Noer Af'idah; Oktaffi Arinna Manasikan; Andri Wahyu Wijayadi
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 11, No 2: April 2023
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v11i2.7436

Abstract

Barium M-hexaferite is a material which has the potential to be developed as a magnetic material which is needed in various fields of application. Various methods have been used to produce this material, but in general these methods require heating at relatively high temperatures. This research was conducted to characterize the magnetic properties and microwave absorption of barium M-hexaferrite which was synthesized using the coprecipitation method by sintering at low temperatures. Synthesis of barium M-hexaferite was carried out using BaCO3, FeCl3. 6H2O, HCl, NH4OH. The results of the coprecipitation were dried using a light bulb at a temperature of 850C, then sintered at a 3000C with variations in holding times of 1 hour, 3 hours and 5 hours. The magnetic properties of the synthesized materials were tested using VSM, while the properties of microwave absorption were characterized using VNA. From the VSM test results, it can be determined that the highest remanence magnetization and coercivity values were found in the samples sintered at 3000C for 3 hours, namely Mr 0.103 emu/gram and Hc 0.058 Tesla. Meanwhile, from testing the absorption properties of the material for microwaves using VNA, it was found that the largest reflection loss value was found in the sample which was calcined for 3 hours, which was 52.4 dB or equivalent to an absorption of 99% at a frequency of 11 GHz. From the research it was found that barium M-hexaferite as a result of coprecipitation can be developed into a good microwave absorbent material.
Co-Authors Andri Wahyu Wijayadi Nur Kuswanti Oktaffi Arinna Manasikan Roudhoutul Aulia Rochim