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Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics
Published by Universitas Mandiri Bina Prestasi
ISSN : -     EISSN : 29862760     DOI : https://doi.org/10.11594/timeinphys
Core Subject : Science, Education,
Education Mathematics Physics
Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics is a peer-reviewed journal that is published by Universitas Mandiri and managed by the Department of Physics, Faculty of Science, Universitas Mandiri. TIME in Physics is published periodically second times a year in January and August. TIME in Physics provides immediate open access to its content to all readers. The journal is designed to serve academicians, researchers, developers, professionals, and others interested in physics. The articles in TIME in Physics included research and developments in Theoretical Physics, Instrumentation Physics, Material-Molecular Physics, and Physics Education.
Arjuna Subject : Fisika dan Astronomi - Instrumentasi
Articles 40 Documents
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Analysis of the Need for E-SWS Development Integrated Ethnoscience and PBL Models for Global Warming to Facilitate Students' Knowledge and Communication Skills Hermanda, Richi Junia; Asrizal; Harman Amir; Suherman, Dea Stivani
TIME in Physics Vol. 3 No. 2 (2025): September
Publisher : Universitas Mandiri

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Abstract

21st-century education demans learning that enchances knowledge and develops communication skills. This study aims to analyze the need for developing an integrated ethnoscience-based E-LKPD on global warming, using a Problem-Based Learning (PBL) model to facilitate students’ knowledge acquisition and communication skills. The preliminary study was conducted at SMAN 1 Enam Lingkung, involving two physics teachers and 32 tenth-grade students in Phase E. A descriptive statistical analysis method was employed, utilizing questionnaire data, written performance assessments, and documentation of Mid-Semester Assessment (MSA) scores. The results show that the learning process still relies on conventional media and has not yet incorporated ICT effectively. Students demonstrated low levels of knowledge (average 42.59%) and communication skills (average 41.29%). Furthermore, teachers have not optimally integrated the ethnoscience approach and the PBL model into their instruction. Based on these findings, an E-LKPD design was developed as an innovative solution to enhance the quality of 21st-century learning, particularly in delivering contextual and meaningful content on global warming.
Analysis of Soil Permeability in Open Land in the UHAMKA East Jakarta Campus Environment as an Indicator of Water Absorption Capacity Hoerudin; Rahma Aliya Sumediyana; Hanifa Safitri; Dede Padli; Dita Suci Dwiyanti; Intan Nia Saputri; Yesa Widiyanti; M.Addya Harielpaniadi; Laksanawati, Wahyu Dian
TIME in Physics Vol. 3 No. 2 (2025): September
Publisher : Universitas Mandiri

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Abstract

This study aims to analyze the water absorption capacity of open land within the UHAMKA East Jakarta campus as an indicator of soil permeability. The methods used were the gravimetric method to measure soil water content and the infiltration method using a cylindrical tube to calculate the water infiltration rate. Samples were taken from three different locations, and the parameters observed included temperature, soil pH, post-oven humidity, and absorbed water volume. The results showed that each sample had varying physical and chemical characteristics. Samples with the highest humidity and lowest pH showed high permeability, while drier and neutral soils had lower permeability. This variation reflects differences in soil pore structure and organic content between locations. This study provides an initial overview of the potential of open land as a natural infiltration medium to support sustainable water management in urban campus environments.
Nano-Teaching in Science Education: A Systematic Review of Pedagogical Innovations Halliru, Abdulkadir; Suwaiba Sa’id Ahmad
TIME in Physics Vol. 3 No. 2 (2025): September
Publisher : Universitas Mandiri

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Abstract

This study reported a systematic literature review (SLR) of pedagogical innovations on nano-teaching in science education. Nano-teaching, a streamlined pedagogical approach involving brief teaching episodes (5–10 minutes) followed by immediate feedback, has emerged as a transformative strategy in science education. This systematic review synthesizes 53 peer-reviewed studies from 2014 to 2024 to explore the applications of nano-teaching, impacts, and challenges. Findings of the literature review highlighted its efficacy in enhancing teacher preparation, student engagement, and conceptual understanding of complex scientific concepts. The review includes a comparison of nano-teaching and microteaching, delineates teacher and student roles and provides both a general textual model and a specific sequence for implementing nano-teaching in cyber classrooms. Challenges such as time constraints, scalability, and teacher resistance are addressed, with recommendations for curriculum integration, professional development, and technology-enhanced delivery. This comprehensive analysis underscores nano-teaching’s potential to revolutionize science education while identifying avenues for future research.
Analysis of the Needs for Developing Reaching Materials Based on Alternative Energy ICT Integrated with Ethno-PBL to Facilitate Students’ Knowledge and Creative Thinking Skills Merindi, Merindi Putri Islami; Asrizal; Hidayati; Hayyu Yumna
TIME in Physics Vol. 3 No. 2 (2025): September
Publisher : Universitas Mandiri

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Abstract

This study aims to design teaching materials that combine ICT and cover the topics of alternative energy, as well as ethno-PBL. The main purpose of creating these teaching materials is to help students understand better and improve their knowledge and creative thinking skills. This study uses descriptive statistical analysis, with data collected through questionnaires, student daily test scores and performance assessments. This study revealed five main findings from the needs analysis including; First, the context analysis of teaching materials for physics learning is still low, with an average score of 42.5. Second, the use of local science in the material is still low, with an average of 40. Third, it shows that the PBL model is not well integrated in the teaching materials, with an average of 48. Fourth, it shows that students' ability to understand the material is still lacking with an average of 34.22. Fifth, creative thinking skills are also still low, with an average of 34.61. The results obtained indicate that the development of ICT-based teaching materials integrated with Ethno-PBL is very much needed by teachers and students to improve students' knowledge and creative thinking skills.
Exploration of the Concept of Light Duality through Quantum Interference Simulation: A Virtual Laboratory-Based Approach Permono Adi Putro; Suryana, Vidya Az-zahra; Sinta Nopianti
TIME in Physics Vol. 3 No. 2 (2025): September
Publisher : Universitas Mandiri

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Abstract

The phenomenon of light duality is a fundamental concept in modern physics that states that light has a dual nature, namely as a wave and a particle. Understanding this concept often becomes a challenge in learning due to the limitations of laboratory facilities to directly observe interference and diffraction phenomena. This study aims to explore the concept of light duality through quantum interference simulations based on a virtual laboratory using PhET Interactive Simulations from the University of Colorado Boulder. The research was conducted in a descriptive-quantitative manner by varying three main parameters, namely the number of slits (1, 2, and 3), slit width (0.04–0.4 mm), and light wavelength (400–700 nm). Each configuration was systematically simulated to observe the resulting diffraction and interference patterns. Data analysis was carried out using descriptive and inferential statistics, including Shapiro-Wilk, Levene, Kruskal-Wallis tests, as well as one-way ANOVA to identify the relationship between optical variables and the characteristics of interference patterns. The research results indicate that with variations in the number and width of slits, light tends to behave like particles with concentrated intensity, whereas with variations in wavelength, the widening light-dark pattern demonstrates wave properties. These findings reinforce the concept of light duality and confirm the effectiveness of virtual laboratories as a learning medium for visually and interactively understanding complex quantum phenomena.  
Hydroxyapatite/Magnetite Nanocomposite Derived from Tuna Fishbone and Iron Sand as Adsorbent for Lead Ions Removing Akhiruddin Maddu; Avia Sefrianty Hidayat; Muhammad Farhan; Zulfa Aulia Rahma
TIME in Physics Vol. 4 No. 1 (2026): March
Publisher : Universitas Mandiri

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Abstract

This study presents the effectiveness of lead (Pb) ion removal utilizing hydroxyapatite/magnetite (Fe3O4) nanocomposite as adsorbent. Hydroxyapatite (HAp) was derived from tuna fishbone waste by using ultrasonochemical treatment in NaOH solution, while magnetite (Fe3O4) was derived from iron sand by acid hydrolysis. The XRD analysis results confirmed that the hydroxyapatite and magnetite phases have been formed in each sample. The SEM image of the hydroxyapatite sample showed a rod-shaped morphology that is not uniform, whereas obtained magnetite showed the agglomerated spherical morphology. Functional groups of HAp and Fe3O4 was identified using FTIR spectroscopy. The effectiveness of hydroxyapatite/magnetite nanocomposite-based adsorbents used lead (Pb) metal ion in water as pollutant model. The hydroxyapatite/magnetite nanocomposite adsorbent with a mass ratio of 1:1 (HAp:Fe3O4) showed better performance in removing lead metal ions from water. The adsorption efficiency of adsorbent for composition 1:1 (HAp:Fe3O4) up to 36,7%, while for composition 2:1 (HA:Fe3O4) just 30,4% for 25 minutes treatment. On the other hand, the adsorption capacity of adsorbent for composition 1:1 (HAp:Fe3O4) up to 51,4 mg/g, while for composition 2:1 (HAp:Fe3O4) just 44,6 mg/g for 25 minutes treatment.
Electronic assessment of parabolic motion materials is practical: in assessing students' critical thinking skills Asrizal; Dela Safitri; Hamdi; Selma Riyasni
TIME in Physics Vol. 4 No. 1 (2026): March
Publisher : Universitas Mandiri

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Abstract

21st-century physics learning requires students to possess critical thinking skills; however, the assessment instruments used in schools are still dominated by conventional questions that have not optimally measured these skills, particularly in the topic of parabolic motion. In addition, the use of technology in learning assessment has not been maximized. This study aims to analyze the practicality of electronic assessment in measuring students’ critical thinking skills on parabolic motion material. This research is a development study using the Plomp model, limited to the development stage, namely the practicality test. The practicality test was conducted through one-to-one evaluation and small-group evaluation involving tenth-grade students and physics teachers at SMAN 1 Padang Ganting. The data collection instrument was a practicality questionnaire using a Likert scale covering aspects of ease of use, attractiveness, efficiency, and usefulness. The results show that the electronic assessment has a very high level of practicality, with an overall average score of 89.3%. Therefore, the developed electronic assessment is feasible to be used as an assessment instrument to measure students’ critical thinking skills effectively, efficiently, and attractively in the topic of parabolic motion.
Analysis of the Differences Between Spring and Pendulum Oscillation Signals Using the Taylor Series Approach Fitroh Abdul Malik; Rayya Nurfauziah; Siti Sofiah Tiska Pratama; Imas Ratna Ernawati; Tri Isti Hartini
TIME in Physics Vol. 4 No. 1 (2026): March
Publisher : Universitas Mandiri

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Abstract

This study aims to analyze and compare the characteristics of oscillation signals in spring and pendulum systems using the Taylor series approach to understand the influence of mathematical approximations on the physical representation of harmonic and non-harmonic oscillatory phenomena. The research method employs experimental simulations using PhET Interactive Simulations in the Masses and Springs and Pendulum Lab modules with small and large displacement variations. The analysis is conducted by comparing oscillation signals obtained from the first-order Taylor series approximation for the spring system and the third-order approximation for the pendulum system with ideal data and simulation results. The results indicate that the Taylor series approach is capable of quantitatively visualizing differences in modeling accuracy based on the order of approximation used. In conclusion, this study demonstrates that the spring system can be accurately represented using a linear (first-order) approximation, whereas the pendulum system requires a higher-order (third- order) approximation to maintain accuracy at large displacements. This study provides an educational contribution by strengthening students’ understanding of modeling real physical systems through appropriate mathematical approaches.
An Internet of Things-Based Smart Monitoring System for Soil Moisture and Temperature Ahmad Sofyan Sulaeman; Vina Umaya Octaviani; Muhamad Agung Suhendra
TIME in Physics Vol. 4 No. 1 (2026): March
Publisher : Universitas Mandiri

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Abstract

The development of Internet of Things (IoT) technology provides significant opportunities for the application of smart farming to improve the effectiveness of monitoring plant environmental conditions. This study aims to design and build an IoT-based soil monitoring system capable of measuring soil moisture and temperature parameters in real-time. The designed system uses a soil moisture sensor, a temperature sensor, an ESP32 microcontroller, an RTC module, and a microSD. Measurement data is displayed via the Blynk application and Telegram notifications so that it can be accessed remotely. The research method is carried out through several stages, namely literature review, site selection and preparation, hardware assembly, system testing, and sensor calibration. Soil moisture and temperature data are collected periodically at certain time intervals and stored for analysis purposes. The results of the 10-hour test show that the system is able to perform well, indicated by fairly stable sensor readability after calibration and the ability to send data to the Blynk and Telegram applications in a timely manner. Based on the research results, this IoT-based soil monitoring system can help users monitor soil environmental conditions efficiently and accurately.
Simulation of DC Motor Speed Control with Fuzzy Logic Controller Razendra Ibnu Majah; Mohammad Mujirudin; Agus Fikri; Arry Avorisano
TIME in Physics Vol. 4 No. 1 (2026): March
Publisher : Universitas Mandiri

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Abstract

Direct current (DC) motors are widely used in industrial applications due to their simple structure and ease of speed control. However, load variations can cause speed drops and instability, so a control system is required to maintain motor speed at a desired reference value. This study presents the modeling and simulation of a DC motor speed control system using a Proportional Integral Derivative (PID) controller and a Fuzzy Logic Controller (FLC) based on MATLAB Simulink. The DC motor used in this research is a Pittman Series GM 1490, which is mathematically modeled in the form of a transfer function. The PID controller parameters are tuned using the Ziegler–Nichols method, while the fuzzy controller is designed using membership functions and a rule base based on linguistic logic. Simulation results show that the PID controller reaches steady state faster than the fuzzy controller with a settling time of 0.3253 seconds, but produces an overshoot of 0.0529%. Meanwhile, the fuzzy controller provides a smoother and more adaptive response, although with a relatively longer settling time. These results indicate that the PID controller offers the best performance in terms of response speed, while the fuzzy controller has strong potential as an adaptive control alternative.

Page 4 of 4 | Total Record : 40

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