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All Journal JBIO: jurnal biosains (the journal of biosciences) Jurnal Pelita Pendidikan Jurnal Florea Jurnal Pendidikan Fisika JOURNAL OF APPLIED INFORMATICS AND COMPUTING
Tri Harsono
EEPIS ITS
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Education Immunology & microbiology Medicine & Pharmacology Physics Social Sciences

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Deteksi Microaneurysm Pada Mata Sebagai Langkah Awal Untuk Penentuan Diabetic Retinophaty Menggunakan Pengolahan Citra Digital Anisa Habsari; Tri Harsono; Heny Yuniarti; Rita Tjandra
Journal of Applied Informatics and Computing Vol 5 No 2 (2021): December 2021
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaic.v5i2.3302

Abstract

Diabetic Retinopathy is a microvascular complication of diabetes mellitus. According to WHO (World Health Organization), there are more than 347 billion people who suffer from diabetes. This disease will become the seventh leading cause of death in the world in 2030. Based on research in Indonesia, it is estimated that there are 42.6% of diabetic retinopathy. Therefore, this final project plans a system to assist doctors in identifying diabetic retinopathy through its characteristics, namely microaneurysm. This system begins with an input retinal image from the fundus camera. Then the input will be processed in preprocessing to increase the contrast using the green channel. The next stage is segmentation. This is used to detect candidates from blood vessels and microaneurysms that use morphology operations. The next step is feature extraction, where it uses the features of glcm and white pixels detected in the image resulting from segmentation. The value of the white pixels and the values in the glcm feature are used as parameters in determining whether the classification process will be used as a determination of a Diabetic Retinopathy image or not. The success rate of the system using the SVM (Support Vector Machine) method is 88.4%.
The Effect of Applying the Problem-Based Learning Model on Students’ Critical Thinking Skills in the Topic of Ecosystem Components and Their Interactions in Grade X of SMAN 17 Medan in the Academic Year 2024/2025 Purba, Frans Joko; Tri Harsono
Florea : Jurnal Biologi dan Pembelajarannya Vol. 12 No. 2 (2025)
Publisher : UNIVERSITAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/florea.v12i2.22795

Abstract

Critical thinking skills are one of the essential 21st-century competencies that students must possess. However, in practice, during classroom learning at SMAN 17 Medan, students’ critical thinking skills are still relatively low due to the teacher-centered learning model being used. Therefore, a learning model that can encourage students to think critically is needed, one of which is the Problem-Based Learning (PBL) model.This study aims to determine the effect of the Problem-Based Learning model on students’ critical thinking skills. The research employed a quantitative method with an ex post facto research design, using a One Group Pretest-Posttest design. The sampling technique applied was purposive sampling. The research sample consisted of two classes, namely Class X-7 and Class X-8, both of which were treated with the same learning model, Problem-Based Learning, with a total of 70 students. The research instrument used to measure students’ critical thinking skills was an essay test. The results showed that the critical thinking skill scores in Class X-7 were 81.47 and in Class X-8 were 81.18. Data analysis using the paired sample t-test showed a significance value of 0.00 (Sig. < 0.05). Based on the results, it can be concluded that the implementation of the Problem-Based Learning model has a significant effect on the critical thinking skills of tenth-grade students in the subject of ecosystem components and their interactions at SMAN 17 Medan.
The Effect of the Implementation of the Problem Based Learning Model on Student Learning Outcomes in Environmental Pollution Material for Class X of SMA Negeri 3 Kisaran in the 2024/2025 Academic Year Aulya, Liana Sari; Tri Harsono
Florea : Jurnal Biologi dan Pembelajarannya Vol. 12 No. 2 (2025)
Publisher : UNIVERSITAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/florea.v12i2.22796

Abstract

Seeing the low student learning outcomes at SMA Negeri 3 Kisaran, it is necessary to select a learning model that can improve student learning outcomes. This study aims to determine the effect of Problem Based Learning on student learning outcomes on Environmental Pollution Material in Class X SMA Negeri 3 Kisaran Academic Year 2024/2025. This study uses a quantitative research method with an ex post facto research type. The research design used is one group pretest-posttest. The research sample was determined through a purposive sampling technique. The research sample consisted of two classes, namely Class X-2 and Class X-4 with the same treatment, namely using the Problem Based Learning model, each class consisting of 36 students. The research instrument was a multiple choice test consisting of 20 validated questions. Data analysis used prerequisite tests and t-tests (paired sample t-test). Based on the results of the data analysis, there was a significant influence on student learning outcomes in the two classes with the same treatment where (sig (2-tailed)) <0.05 where the results obtained were <0.001 <0.005. Based on the hypothesis test, it was found that there was an Effect of the Implementation of the Problem Based Learning model on Student Learning Outcomes in Class X of SMA Negeri 3 Kisaran in the 2024/2025 Academic Year. Thus, the implementation of the Problem Based Learning model was proven to be effective in improving student learning outcomes and was able to foster students' curiosity and thinking skills during the learning process.
Co-Authors Anggun Hutagaol Anisa Habsari Anwar Indrawati Berutu Aulya, Liana Sari Carolina Savitry Hutagaol Darusalim Darusalim Derlina , Duma Duma Heni Nurdianti Pratama Heny Yuniarti Herawati Herawati Joke Pratilastiarso Kharina areeisty Masdiana Masdiana Purba, Frans Joko Rifkah Nafthali Tarigan Rita Tjandra Rully Soelaiman Sabani . Suci Anggraeni Ummi Rapikah Yusriati Yusriati