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Center of Pressure Feedback for Controlling the Walking Stability Bipedal Robots using Fuzzy Logic Controller Afrizal Mayub; Fahmizal Fahmizal
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 5: October 2018
Publisher : Institute of Advanced Engineering and Science

This paper presents a sensor-based stability walk for bipedal robots by using force sensitive resistor (FSR) sensor. To perform walk stability on uneven terrain conditions, FSR sensor is used as feedbacks to evaluate the stability of bipedal robot instead of the center of pressure (CoP). In this work, CoP that was generated from four FSR sensors placed on each foot-pad is used to evaluate the walking stability. The robot CoP position provided an indication of walk stability. The CoP position information was further evaluated with a fuzzy logic controller (FLC) to generate appropriate offset angles to be applied to meet a stable situation. Moreover, in this paper designed a FLC through CoP region's stability and stable compliance control are introduced. Finally, the performances of the proposed methods were verified with 18-degrees of freedom (DOF) kid-size bipedal robot.

Implementation smart home using internet of things Afrizal Mayub; Fahmizal Fahmizal; Ma’ruf Shidiq; Unan Yusmaniar Oktiawati; Nur Rohman Rosyid
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 6: December 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i6.11722

Development in technology of information today provides various facilities to support human activity. One technology that facilitates human is the use of automated systems, the application of smart home system makes it easier for users to control household electronic devices. This study addresses one of the smart home solutions with automation systems. The system is built using ESP8266 and Raspberry Pi devices, by utilizing MQTT, REST and Laravel framework protocols. With Arduino, Python and PHP programming, household devices can be controlled both automatically and manually. Control system can be done by using web, chatbot, and physically. The communication used utilizes wireless network. With the designed system, the users can control the device, gain information and get warning. The information provided by the system is obtained from open data on the internet and from the sensor installed on the device.

Modeling climate phenomenon with software grids analysis and display system in the development of the global warming module Afrizal Mayub; Leni Hendraini; Henny Johan; Fahmizal Fahmizal; Rendy Wikrama Wardana
Bulletin of Electrical Engineering and Informatics Vol 10, No 6: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i6.3201

This study aims to model climate change based on rainfall, air temperature, pressure, humidity and wind with grADS software and create a global warming module. This research uses 3D model, define, design, and develop. The results of the modeling of the five climate elements consist of the annual average temperature in Indonesia in 2009-2015 which is between 29oC to 30.1oC, the horizontal distribution of the annual average pressure in Indonesia in 2009-2018 is between 800 mBar to 1000 mBar, the horizontal distribution the average annual humidity in Indonesia in 2009 and 2011 ranged between 27-57, in 2012-2015, 2017 and 2018 it ranged between 30-60, during the East Monsoon, the wind circulation moved from northern Indonesia to the southern region Indonesia. During the west monsoon, the wind circulation moves from the southern part of Indonesia to the northern part of Indonesia. The global warming module for SMA/MA produced is feasible to use, this is in accordance with the value given by the validate of 69 which is in the appropriate category and the response of teachers and students through a 91% questionnaire.

Implementation of Computer Simulation to Streamline Satellite Motion Learning Afrizal Mayub
Indonesian Journal of E-learning and Multimedia (IJOEM) Vol. 2 No. 1 (2023): IJOEM: Indonesian Journal of E-learning and Multimedia (January 2023)
Publisher : CV Media Inti Teknologi

This study aims to (1) produce a simulation-based satellite motion learning program, (2) describe the effectiveness of simulation-based satellite motion learning, (3) describe the level of effectiveness of satellite motion learning using simulation. The research method consists of; First, software engineering research, namely making satellite motion simulation learning programs based on simulation including: analysis, design, code, and testing. Second, research to see the effectiveness of simulation-based satellite motion simulation learning programs. Sampling using total sampling technique. Based on this, the researchers determined a sample of all Science Masters students in semesters 1 and 3 for the 2021/2022 school year as many as 40 people. The results showed that the satellite motion simulation learning program based on simulation was effective in learning, this can be seen from the N Gain value of 0.60 which is in the high or very effective category. Based on the simulation-based satellite motion learning questionnaire, it is effectively used for satellite motion material. It can be seen from the score obtained at 4.14 (from a scale of 1-5) in the effective category.

Learning Media Based on Computer Simulation for Effective Parabolic Motion Learning Afrizal Mayub
Indonesian Journal of E-learning and Multimedia (IJOEM) Vol. 2 No. 2 (2023): IJOEM: Indonesian Journal of E-learning and Multimedia (May 2023)
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/ijoem.v2i2.152

This study aims to (1) produce a computer simulation-based parabolic motion learning program, (2) describe the effectiveness of computer simulation-based parabolic motion learning, (3) describe the level of effectiveness of parabolic motion learning using computer simulation. The research method consists of; First, software engineering research is to create a Parabolic motion simulation learning program based on computer simulation including: analysis, design, code, and testing. Second, research to see the effectiveness of computer simulation baseParabola motion simulation learning programs. Sampling using total sampling technique. Based on this, the researchers determined a sample of all Science Masters students in semesters 1 and 3 for the 2021/2022 academic year as many as 40 people. The results showed that computer simulation-based Parabolic motion simulation learning programs were effective in learning, this can be seen from the N-Gain value of 0.65 which is included in the high or very effective category. Based on a two-dimensional motion simulation questionnaire based on computer simulation, it is effectively used for two-dimensional motion material, this can be seen from the score obtained at 4.4 (on a scale of 1-5), namely in the effective category.

Development of MITEDA (Mitigation of Earthquake Damage) Media for Wave Physics Using a STEM Approach to Enhance Students’ Computational Thinking Skills Kristian Dinata; Afrizal Mayub; Iwan Setiawan; Henny Johan; Sutarno Sutarno
Journal Evaluation in Education (JEE) Vol 6 No 4 (2025): October
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jee.v6i4.1709

Purpose of the study: The aim of this study is to develop and evaluate the effectiveness of a learning media called MITEDA (Mitigation of Earthquake Damage), which is based on the STEM approach and computational thinking, to support the teaching of wave physics. The study focuses on both the development process of the media and its impact on improving students’ computational thinking skills through contextual problem-solving using earthquake simulation and sensor-based data. Methodology: The research method used is Research and Development (R&D) with the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. Tools used include Arduino Uno, SW-420 vibration sensor, LCD 16x2, and a buzzer. Software includes Arduino IDE and Proteus. Data collection used expert validation sheets, student questionnaires, observations, and computational thinking tests. Main Findings: The MITEDA learning media, comprising a digital seismograph kit and instructional module, was rated “highly feasible” by experts (Aiken’s V ≥ 0.80) and received positive student feedback for usability and engagement. Statistical analysis showed a significant improvement in computational thinking skills for the experimental group (N-Gain = 0.84) compared to the control group (N-Gain = 0.56), t(69) = 8.875, p < 0.001, d = 2.716, with the highest gains in abstraction and consistent high-level algorithmic performance. Novelty/Originality of this study: This study presents an innovative learning media, MITEDA, integrating STEM and computational thinking through earthquake simulation using Arduino-based sensors. It advances wave physics learning by providing real-time vibration data and contextual problem-solving, enhancing students’ analytical skills.

Development of MITEDA (Mitigation of Earthquake Damage) Media for Wave Physics Using a STEM Approach to Enhance Students’ Computational Thinking Skills Kristian Dinata; Afrizal Mayub; Iwan Setiawan; Henny Johan; Sutarno Sutarno
Journal Evaluation in Education (JEE) Vol 6 No 4 (2025): October
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jee.v6i4.1709

Purpose of the study: The aim of this study is to develop and evaluate the effectiveness of a learning media called MITEDA (Mitigation of Earthquake Damage), which is based on the STEM approach and computational thinking, to support the teaching of wave physics. The study focuses on both the development process of the media and its impact on improving students’ computational thinking skills through contextual problem-solving using earthquake simulation and sensor-based data. Methodology: The research method used is Research and Development (R&D) with the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. Tools used include Arduino Uno, SW-420 vibration sensor, LCD 16x2, and a buzzer. Software includes Arduino IDE and Proteus. Data collection used expert validation sheets, student questionnaires, observations, and computational thinking tests. Main Findings: The MITEDA learning media, comprising a digital seismograph kit and instructional module, was rated “highly feasible” by experts (Aiken’s V ≥ 0.80) and received positive student feedback for usability and engagement. Statistical analysis showed a significant improvement in computational thinking skills for the experimental group (N-Gain = 0.84) compared to the control group (N-Gain = 0.56), t(69) = 8.875, p < 0.001, d = 2.716, with the highest gains in abstraction and consistent high-level algorithmic performance. Novelty/Originality of this study: This study presents an innovative learning media, MITEDA, integrating STEM and computational thinking through earthquake simulation using Arduino-based sensors. It advances wave physics learning by providing real-time vibration data and contextual problem-solving, enhancing students’ analytical skills.

Development of a Stem-Based Mini Hydropower Education Kit on Renewable Energy Materials to Improve High School Students' Science Process Skills Septiana Septiana; Afrizal Mayub; Henny Johan
IJIS Edu : Indonesian Journal of Integrated Science Education Vol 8, No 2 (2026): July
Publisher : UIN Fatmawati Sukarno Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29300/ijisedu.v8i2.12187

The integration of Science, Technology, Engineering, and Mathematics (STEM) into science education has become an effective approach to fostering students' higher-order thinking and science process skills. However, the limited availability of interactive learning media for renewable energy topics, particularly mini hydropower systems, remains a challenge in high school science instruction. This study aimed to develop a STEM-based Mini Hydropower Education Kit on renewable energy materials and evaluate its validity, practicality, and effectiveness in improving high school students' science process skills. This research employed the Research and Development (R&D) method using the ADDIE model, consisting of Analysis, Design, Development, Implementation, and Evaluation stages. The developed education kit was validated by experts in physics education, learning media, and instructional design. The implementation involved high school students who participated in STEM-oriented learning activities using the developed kit. Data were collected through expert validation sheets, student and teacher response questionnaires, observation sheets, and science process skills tests administered before and after the intervention. The findings indicated that the developed education kit achieved a very high level of validity and practicality based on expert assessments and user responses. Furthermore, the implementation of the STEM-based Mini Hydropower Education Kit significantly improved students' science process skills, including observing, formulating hypotheses, conducting experiments, interpreting data, and drawing conclusions. The improvement was reflected in higher post-test scores compared to pre-test results and supported by positive student engagement during learning activities. Therefore, the developed education kit can serve as an effective instructional medium for renewable energy education while promoting meaningful STEM learning and enhancing students' science process skills in secondary education.

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