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All Journal Jurnal Informatika dan Teknik Elektro Terapan International Journal of Elementary Education Jurnal Inovasi Pendidikan dan Teknologi Informasi (JIPTI) Journal of Multidisciplinary Science: MIKAILALSYS Jurnal Pendidikan IPA Indonesia
Yohandri
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Environmental Science Health Professions Mathematics Physics Public Health Social Sciences Other

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Profile of Students’ 21st Century Skills in Digital Learning Using The Contextual Teaching and Learning (CTL) Model Atika Ulya Akmal; Yohandri; Abdul Razak
International Journal of Elementary Education Vol 7 No 4 (2023): November
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijee.v7i4.66570

Abstract

The 21st century skills are skills that really need to be developed to face the current digitalization era. Looking at the current conditions, students' 21st century skills are not very prominent and are not well developed so that students need new innovations that can support 4C skills. The purpose of this study was to analyze the 21st century skill profile of first semester Elementary School Teacher Study Program students in the elementary physics basic concepts course. This type of research is descriptive research. The sample of this research was 110 students selected with a specific purpose or by purposive sampling technique. The data collection techniques used are questionnaires, interviews, and observation. The data were analyzed using descriptive statistics which would show the percentage of the number of students per category. The results of this study indicate that for creative thinking skills, collaboration and communication the percentage of students is in the near standard category. As for creative thinking skills, the percentage of students is in the substandard category. This shows that students' 21st century skills still need to be improved. learning activities that facilitate the emergence of 21st century skills need to be carried out continuously or continuously so that students are accustomed to and achieve the desired standards. The conclusion of this study is that students' 21st century skill profiles in digital learning with CTL are in a status close to a good standard, except for creative thinking skills that still require some extra treatment to improve them.
Uncovering the Potential of Ethnoscience in Science Learning to Improve Students’ Literacy: A Systematic-Literature Review (2014–2024) Nur Hikmah; Yohandri; Fitri Arsih; Minda Azhar; Abdul Razak
Jurnal Pendidikan IPA Indonesia Vol. 14 No. 3 (2025): September 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v14i3.19591

Abstract

Literacy is a crucial 21st-century skill aligned with SDG 4 (Quality Education), yet Indonesian students continue to face challenges, as reflected in PISA 2022 results. Ethnoscience, which integrates local wisdom into science education, offers a promising approach to address this issue. This study presents a systematic literature review of research published between 2014 to 2024 on the use of ethnoscience in science learning and its impact on student literacy. The findings indicate that ethnoscience has been widely applied, particularly at the high school level, through strategies such as project-based learning, inquiry, and STEAM. Ethnoscience contributes to improving scientific, environmental, and cultural literacy by contextualizing science learning and fostering engagement, critical thinking, and cultural awareness. This research synthesizes a decade of empirical evidence on ethnoscience integration in science education, maps the strategies employed, and examines their relationship with students’ literacy outcomes. The results suggest that ethnoscience provides a culturally grounded approach that can effectively support the development of science literacy.
STATE OF THE ART REVIEW: THE EFFECTIVENESS OF IMPLEMENTING PROBLEM BASED LEARNING (PBL) MODELS IN IMPROVING SCIENCE LEARNING Wulandari, Titis; Karlinda; Tanjung, Yul Ifda; Yohandri; Abdul Razak
Jurnal Inovasi Pendidikan dan Teknologi Informasi (JIPTI) Vol. 7 No. 1 (2026): Jurnal Inovasi Pendidikan dan Teknologi Informasi (JIPTI)
Publisher : Information Technology Education Department

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52060/jipti.v7i1.4044

Abstract

The problem based learning model is a student centered learning strategy, which is an innovative that learning model provides active learning conditions . this study aims to measures the effectiveness of research articles on the application of the PBL model to improving science learning. this type of research is a meta- analysis using secondary and quantitative data to draw accurate conclusion in the form of effectiveness by searching the literature from the EBSCO database, Google Scolar and Taylor & Francis. Articles that have been published from 2019-2023. The keywords for cross - sectional studies are as follows: "Problem based learning " and " education " and " science learning outcomes ". The articles studied were full text articles with an observational research design. The articles were collected using the PRISMA diagram, and analyzed using the Reviews Manager 5.3 applications. Based on the results of the Forest Plot of 4 articles on learning with the application of the PBL Model, it has 1.09 units higher to get good learning outcomes compared to students who are given the application of the non PBL model (P<0.001; 95% Ci: 0.29 – 1.89; I2 = 94%).
PERANCANGAN SISTEM OPTOELEKTRONIKA SEDERHANA MENGGUNAKAN CAHAYA ULTRAVIOLET UNTUK ANALISIS INTERAKSI CAHAYA DENGAN ZAT Dani Kurniawan; Mona Berlian Sari; Yohandri; Rahmat Hidayat
Jurnal Informatika dan Teknik Elektro Terapan Vol. 14 No. 3 (2026)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v14i3.11021

Abstract

Analisis sifat penyerapan cahaya suatu zat memainkan peran penting dalam menentukan konsentrasi komponen penyusunnya yang memengaruhi stabilitas larutan, arah dan laju reaksi, serta sifat kimiawi zat-zat yang terkandung di dalamnya. Saat ini, pengujian kandungan dan konsentrasi zat dilakukan dengan menggunakan metode spektrofotometri, yang menawarkan akurasi pengukuran tinggi; namun, harga pembelian dan biaya pemeliharaan yang relatif tinggi membuat metode ini sulit diakses oleh masyarakat umum. Penelitian ini bertujuan untuk merancang sistem optoelektronik sederhana guna menganalisis interaksi cahaya dengan zat menggunakan radiasi ultraviolet. Penelitian ini menggunakan pendekatan teknik, dimulai dengan identifikasi masalah, tinjauan pustaka, analisis spesifikasi komponen, serta perancangan sistem optik dan elektronik, dan diakhiri dengan pembuatan dan pengujian. Sistem ini dirancang dengan LED UV 10W sebagai sumber cahaya dan sensor GUVA-S12SD sebagai detektor. Pengujian dilakukan melalui karakterisasi sensor dan pengujian akurasi. Hasil menunjukkan bahwa uji karakterisasi menghasilkan koefisien determinasi mendekati 1, sedangkan uji akurasi menunjukkan bahwa instrumen spektrofotometer ultraviolet memiliki akurasi rata-rata sebesar 98,99
Classification of Flood-Prone Areas in Padang City Using Landsat-9 Satellite Imagery Fitria, Ramona; Razi, Pakhrur; Yohandri; Sudiar, Nofi Yendri
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 3 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Flood-susceptibility mapping requires spatial information that captures the combined influence of hydrological conditions, topography, soils, and land cover. This study classified and mapped flood-prone areas in Padang City by integrating six parameters: rainfall, elevation, slope, distance from rivers, soil type, and land use/land cover. A quantitative spatial approach using Geographic Information Systems (GIS) was employed. Land cover was classified from Landsat-9 Collection 2 Level-2 imagery using the Classification and Regression Trees (CART) algorithm in Google Earth Engine. The six parameters were subsequently scored, weighted, and integrated through weighted-overlay analysis. The land-cover classification achieved an overall accuracy of 85.17%, while the overlay analysis delineated five flood-susceptibility classes. Moderate susceptibility occupied the largest area, covering 30,675.414 ha (45.79%), followed by high susceptibility at 17,631.140 ha (26.32%), low susceptibility at 17,226.524 ha (25.72%), very high susceptibility at 1,420.275 ha (2.12%), and very low susceptibility at 31.048 ha (0.05%). These findings reveal substantial spatial variation in flood susceptibility across Padang City, with moderate susceptibility predominating. The study provides an integrated spatial assessment to support disaster mitigation and environmentally responsive land-use planning.
Experimental Validation of End-Effector Position Accuracy and Repeatability of a Waste-Sorting Delta Robot E. Hasibuan, Lukas; Yohandri; Kamus, Zulhendri; Sari, Mona Berlian
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 3 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

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Abstract

The positioning accuracy of Delta robots depends on the agreement between the kinematic model and actual arm motion, particularly in systems driven by open-loop stepper motors with belt transmissions. This study experimentally validated a simplified kinematic model for a waste-sorting Delta robot by evaluating angular accuracy and end-effector distance precision and repeatability. A closed-form inverse kinematics model was formulated to map target coordinates to arm angles and stepper microsteps and implemented on an Arduino Mega 2560. Angular accuracy was assessed by comparing model-computed arm angles with digital inclinometer measurements at three target points corresponding to waste-bin locations, with 10 repetitions per point. Distance precision and repeatability were evaluated through 10 repeated movements between two points 82 mm apart, with pen-marked positions measured using ImageJ. The results showed a mean angular accuracy of 98.71%, a mean distance precision of 99.88%, and distance repeatability of ±0.39 mm. Angular errors were systematic and varied across arms, with the largest mean error of 1.72° observed in arm 2. The end-effector displacement estimated from these errors ranged from 3.6 to 5.8 mm, remaining below the 25 mm radius of the waste-bin opening. These findings provide experimental support for the feasibility of the simplified kinematic model for waste placement at the tested positions and indicate potential for improving positioning accuracy through per-arm error compensation.
Co-Authors Abdul Razak Akmal, Atika Ulya Dani Kurniawan E. Hasibuan, Lukas Fitri Arsih Fitria, Ramona Karlinda Minda Azhar Mona Berlian Sari Nofi Yendri Sudiar Nur Hikmah Pakhrur Razi Rahmat Hidayat Sari, Mona Berlian Titis Wulandari Yul Ifda Tanjung, Yul Ifda Zulhendri Kamus