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All Journal Edufisika: Jurnal Pendidikan Fisika Journal of Energy, Material, and Instrumentation Technology
Aryani, Refi Meilia
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Control & Systems Engineering Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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PENERAPAN KEPEMIMPINAN KOLABORASI KEPADA KEPALA UNTUK MENINGKATKAN KUALITAS PEMBELAJARAN Aryani, Refi Meilia; Haryadi, Rudi
EduFisika: Jurnal Pendidikan Fisika Vol 8 No 1 (2023): EduFisika: Jurnal Pendidikan Fisika Volume 8 Nomor 1 April 2023
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59052/edufisika.v8i1.24602

Abstract

This study aims to analyze the application of collaborative leadership by school principals in improving school learning quality. The research method used is a literature study by collecting data from reliable sources such as scientific journals, books, and official publications. The results show that collaborative leadership can improve the quality of learning by strengthening cooperation and communication between principals, teachers, and students. In collaborative leadership, the principal is a facilitator who encourages active participation from all parties in the decision-making process and program implementation. In addition, principals can also create a school culture that supports collaboration and facilitates teachers' professional development. Recommendations include the importance of collaborative leadership training for principals, the development of a school culture that supports collaboration, and rewards for active participation in the collaborative process.
The Effect of Chitosan Addition on Phase Composition and Detection Sensitivity of Fe3O4/Chitosan Magnetic Label Nanoparticles Based on Giant Magnetoresistance Sensor Prayoga, Galih Aji; Oktarisa, Yuvita; Antarnusa, Ganesha; Fitriani, Nur Shabrina; Aryani, Refi Meilia; Suherman, Andri; Guntara, Yudi
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 4 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i4.282

Abstract

This study describes how phase composition affects the ability of giant magnetoresistance (GMR) chip-based sensors to detect magnetic labels made of Fe3O4 and Fe3O4/chitosan that were synthesized using the co-precipitation method. X-ray diffraction (XRD) analysis revealed that the synthesized nanoparticles were a mixture of magnetite and maghemite phases. The most intense diffraction peak at 2θ = 35.6° (311) confirmed the presence of the magnetite phase. The addition of chitosan significantly increased the proportion of the maghemite phase from 10% to 25%, with the appearance of an additional peak at 2θ = 33° (221). The modification of Fe3O4 nanoparticles into Fe3O4/chitosan nanocomposites resulted in changes in sensor sensitivity. The GMR sensor successfully detected Fe3O4 and Fe3O4/chitosan magnetic labels within 30 seconds with high sensitivities of 0.746 and 0.761 mV/( g/mL), respectively. The limit of detection (LOD) was also very low at 0.419 and 0.428 g/mL. These findings show that Fe3O4/chitosan nanocomposites integrated GMR chip-based sensors can be a dependable instrument for detecting a variety of biomolecules such as Bovine serum albumin (BSA).
Co-Authors Andri Suherman Aryati, Deni - Fitriani, Nur Shabrina Ganesa Antarnusa Guntara, Yudi Prayoga, Galih Aji Rudi Haryadi, Rudi Tabrani, Rizqi A’mal Hibatullah Yuvita Oktarisa, Yuvita