Radiasi : Jurnal Berkala Pendidikan Fisika

The Effectiveness of Technology-Based PhET Simulation-Assisted PBL Models to Minimize Misconceptions of Force and Motion Material

Linda Yuni Haryanto, Henry Setya Budhi — Tue, 23 Sep 2025 18:20:53 +0700

This study aims to determine the effectiveness of the Problem-Based Learning (PBL) model assisted by PhET simulation in minimizing misconceptions and improving students' conceptual understanding of force and motion material. The study used a quantitative approach with a pre-experimental design in the form of one group pre-test – post-test. The subjects of the study were grade VII students of SMP Negeri 2 Gebog. The instruments used were diagnostic tests based on the Certainty of Response Index (CRI) to identify misconceptions and pre-test and post-test tests to measure conceptual understanding quantitatively. The results showed that there was a decrease in misconceptions by 9 percent after the implementation of learning, as well as an increase in conceptual understanding with an average N-Gain value of 0.422348 or 42.23 percent, which is included in the moderate category. The Moving Man PhET simulation allows students to explore the relationship between motion variables visually and interactively, thereby helping to improve understanding of abstract concepts such as position, velocity, and acceleration. PBL which begins with the use of contextual phenomena successfully builds students' cognitive involvement and encourages critical thinking processes. Based on these results, the PBL model assisted by PhET simulation is considered quite effective as an alternative technology-based learning to overcome misconceptions and strengthen conceptual understanding of motion and force material.

Digital Comic Design as a Visualization Concept of Fluid Materials in The Traditional Tofu Production Process

Siti Khoirul Nurrohmah, Siska Desy Fatmaryanti, Arif Maftukhin — Fri, 26 Sep 2025 18:28:47 +0700

The development of digital technology has driven transformation in the world of education, including in the development of learning media. One form of innovation that is developing is the use of creative learning media such as digital comics based on local wisdom. Digital comics that raise the process of making tofu as a representation of local potential are considered suitable for learning fluid materials because they are able to relate physics concepts to real phenomena around students. This media not only brings students closer to the real environment around, but also strengthens their understanding of the potential of their area. This research uses the Research and Development (R&D) research method, this research model is the development of ADDIE which consists of 5 stages of analysis, development, implementation, and evaluation. This research is limited to the development of digital comics without implementation due to research limitations. The validity test that has been carried out on digital comics that has been developed resulted in assessments from material experts with an Aiken V value of 0.88, media experts of 0.88, and educators of 0.90 including valid categories. Thus, digital comic learning media based on local wisdom is valid and suitable for use in learning.

Analysis of Student Participation in STEM-Based Robotics Lessons Using Transcript-Based Lesson Analysis

Melan Yulia Sari, Nova Susanti, Rahma Dani — Sun, 28 Sep 2025 17:29:15 +0700

This study aims to analyze student engagement in STEM-based robotics learning at SMP IT Nurul Ilmi, Jambi City. The research was conducted using the Lesson Study approach and the Transcript-Based Lesson Analysis (TBLA) technique to examine student engagement based on the following indicators: actively working on learning tasks, asking questions to teachers or peers, seeking information to solve problems, participating in group discussions, assessing acquired skills/results, practicing similar problem-solving, and applying learning outcomes to new tasks. Data were collected through observations, audio recordings, and transcript analysis using Excel, presented in percentage form. The results show that the most prominent indicator was active involvement in completing learning tasks (38 percent), while the lowest indicators were practicing similar problem-solving (2 percent) and seeking information to solve problems (0.13 percent). These findings indicate that STEM-based robotics learning can foster student participation in core activities but has not yet fully developed scientific skills that serve as an essential foundation in science learning, such as observing phenomena, formulating questions, seeking information, and re-examining concepts through similar problems. Therefore, the implementation of robotics learning in the context of science education needs to be designed to train students in independent exploration, critical thinking, and transferring knowledge to new situations in accordance with the characteristics of science learning to support 21^stcentury skills.

Profiles of Problem-Solving Strategies in Kinematics: A Comparison Between High, Average, and Low Achieving Undergraduates

Suci Rizkina Tari, Fadiya Haya, Musdar Musdar — Tue, 30 Sep 2025 10:27:47 +0700

Problem solving is an essential competency in physics learning, particularly in the topic of kinematics, which requires mastery of concepts, analytical skills, and effective thinking strategies. Understanding the profiles of students’ problem-solving strategies across different achievement levels can provide detailed insights into the variety of strategies employed and the areas that require instructional intervention. This study aims to describe and compare the problem-solving strategies of Physics Education undergraduate students with high, medium, and low achievement in solving kinematics problems. A qualitative method was employed, involving six participants representing the three achievement categories. The primary data were collected through the think-aloud technique, supported by observations, retrospective interviews, and answer sheet analysis. The comparison of profiles revealed differences in strategic tendencies and completeness of problem-solving stages among the three student groups. These findings offer strategic insights for developing adaptive teaching methods to enhance problem-solving skills across various levels of academic achievement.

Enhancing Learning Outcomes Through the Development of Project-Based Student Worksheet for Class XI MIPA Students in Science Subjects

Dewita Amalia Nur, Silvi Trisna, Iing Rika Yanti — Tue, 30 Sep 2025 00:00:00 +0700

This research was motivated by some students who said that physics is not fun. Students expect physics learning to be equipped with a practicum directly according to the material to be studied. To create a good interaction, creativity between students is necessary. One of them is by developing teaching materials in the form of PjBL-based LKPD for class XI MIPA students. The PjBL-based learning model actively engages students to develop their own knowledge and includes group work to create projects as an application of principles and concepts that have been acquired. This study aims to develop valid and practical PjBL-based Student Worksheets for grade XI MIPA students. The research used by researchers is Research and Development (R&D). This research procedure is an ADDIE model which consists of 5 stages, namely analysis, design, development, implementation, and evaluation, at the evaluation stage is not carried out due to time constraints. The research instruments used are validity and practicality questionnaires. Furthermore, the results obtained are analyzed to see the validity and practicality of LKPD. From the results of the study, it was found that the PjBL-based LKPD developed was categorized as very valid with a percentage of 87.13 percent and very practical with a percentage of 94.40 percent. The validity and practicality of the LKPD is illustrated from the results of validation by experts, there are four aspects of assessment, namely aspects of content feasibility, language, presentation, and media.

Analysis of Rainfall Patterns in Papua Using The Empirical Orthogonal Function

Melly Ariska, Amelia Putri Sayyendra, Hamdi Akhsan — Tue, 30 Sep 2025 00:00:00 +0700

Indonesia as a tropical maritime country, experiences dry and rainy seasons influenced by geographical location, topography, winds, and climate phenomena such as ENSO and IOD. Although extensive research on rainfall patterns in Indonesia exists, specific studies on Papua remain limited. This gap leads to insufficient understanding of Papua's rainfall characteristics and dynamics, including dominant patterns and variability factors. This study aims to analyze rainfall patterns in Papua using the Empirical Orthogonal Function (EOF) method to identify dominant patterns and key modes of variability systematically. The EOF method is applied to extract dominant patterns from complex datasets, enabling spatial and temporal analysis of rainfall variability in the region. Analyzing rainfall patterns in Papua (1981–2015) using EOF combined with Machine Learning reveals that average rainfall intensity in Papua ranges from 0–9 mm per month. The EOF analysis identifies three principal modes explaining 62.53 percent, 11.39 percent, and 7.01 percent of total variance, respectively. EOF1 indicates dominant positive anomalies, while EOF2 and EOF3 show mixed positive and negative anomalies. Furthermore, rainfall variability in Papua is significantly influenced by interactions between the Indian Ocean Dipole (IOD) and El Niño-Southern Oscillation (ENSO), where positive IOD and El Niño phases contribute to dry conditions and reduced rainfall, while negative IOD and La Niña phases lead to wet conditions and increased rainfall.