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All Journal Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran EINSTEIN (E-JOURNAL)
Yossie Juliastri Napitupulu
State University Of Medan
Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Other

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Comparison of Learning Outcomes Using Models Media Assisted Problem Based Learning on Materials Supporting Solution Class XI Senior High School Yossie Juliastri Napitupulu; Jasmidi Jasmidi
Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran Vol 8, No 3 (2023): July
Publisher : UNDIKMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jtp.v8i3.7768

Abstract

The aim of this study was to find out the differences in student learning outcomes taught using the Problem Based Learning (PBL) model using Powtoon media and Powerpoint media. This method of research is a quasi-experimental research with a non-equivalent control group design. The research sample was taken randomly from a homogeneous population, namely 2 classes XI MIA 2 and XI MIA 3 with a total of 64 students.The N-gain result for the experimental class I was 0.73% and for the experimental class II was 0.63%, based on the results of the experimental class I which was included in the high category. It was obtained that the average value of student learning outcomes in experimental class I was 84.38 while in experimental class II was 77.81 so that there was a significant difference in the value of student learning outcomes using the Problem Based Learning learning model assisted by Powtoon and Powerpoint media.
MORPHOLOGICAL AND THERMAL PROPERTIES STUDY OF PCL BIOCOMPOSITES WITH NANOCELLULOSE FILLER FROM RICE HUSK USING PCLacac COMPATIBILIZER AS  MATERIAL CANDIDATE FOR BONE SCAFFOLDS Muhammad Yusuf; Yossie Juliastri Napitupulu; Eddiyanto Eddiyanto; Innayah Wulandari; Winsyahputra Ritonga
EINSTEIN (e-Journal) Vol. 14 No. 2 (2026): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/8phs4e72

Abstract

Biocomposites from poly(ε-caprolactone) (PCL) matrix with nanocellulose filler are materials that have been developed for biomedical applications, such as scaffolds, tissue engineering, implants, and wound dressings. The PCL matrix is flexible and biocompatible. Meanwhile, the rice husk nanocellulose filler is environmentally friendly, renewable, and abundantly available in Indonesia. However, the differences in the hydrophobic properties of PCL and the hydrophilic properties of nanocellulose cause low interfacial adhesion, so a compatibilizer is needed to improve the compatibility of the two phases. This study aims to examine the effect of adding short-chain PCL (PCLacac) as a compatibilizer. The mixing of the PCL matrix, nanocellulose filler, and PCLacac compatibilizer used the solvent casting method. The characterization results using Scanning Electron Microscopy (SEM) showed that the addition of PCLacac can improve interfacial adhesion between the matrix and filler, characterized by a more even filler dispersion and reduced agglomeration. On the other hand, thermogravimetric analysis (TGA) analysis showed that the addition of 3% PCLacac resulted in an increase in decomposition temperature, which indicates an increase in thermal stability due to better interfacial interactions between the matrix and filler. Thus, the addition of PCLacac plays an effective role in improving the morphological structure and thermal resistance of PCL/rice husk nanocellulose biocomposite, so it has the potential to be developed as a biocomposite material in biomedical applications including bone scaffolds.
Co-Authors Eddiyanto Eddiyanto Innayah Wulandari Jasmidi Jasmidi Muhammad Yusuf Winsyahputra Ritonga