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Justek : Jurnal Sains Dan Teknologi
Published by Universitas Muhammadiyah Mataram
ISSN : 26205475     EISSN : 26205475     DOI : -
Core Subject : Science, Education, Engineering,
Computer Science & IT Control & Systems Engineering Education Mathematics
Arjuna Subject : -
Articles 277 Documents
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Development of Interactive Learning Multimedia on Harmony Materials in the Ecosystem Rhamdan, Donna; Novitasari, Neni; Mufidah, Tazkiyah
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.37450

Abstract

This research aims to develop interactive learning multimedia that is feasible and interesting. This research uses research and development (R&D) methods with research and development procedures using the ADDIE Model which consists of several stages, namely: Analyze, Design, Develop, Implement, and Evaluate. Then the sampling technique used was the saturated sampling technique, where the sample taken used all members of the population, namely 27 students. The model focuses on a systematic learning process. The products that have been designed, validated by subject matter experts with an average percentage of 95% with a very feasible category, validation by linguists with an average percentage of 85% with a very feasible category, validation by design experts with an average percentage of 95% with a very feasible category, and assessments from practitioners in the form of teacher response questionnaires to interactive learning multimedia developed by researchers get a percentage of 95% with the category very feasible, and the average percentage of student response questionnaires for the trial use is 95% with a very interesting category. Based on the description above, it can be concluded that feasibility is determined by the validation results from experts and practitioners as well as the attractiveness of student responses. Furthermore, this research on the development of interactive learning multimedia still focuses on the subject of harmony in ecosystems. Therefore, further research is expected to expand to other abstract and difficult-to-understand materials for students.
Optimizing Business Process To Government Using Business Process Improvement (BPI) and Bizagi Modeler (Case Study: PT. XYZ) Dwiyono, Pangga Cahyo; Murhadi, Murhadi; Saputro, Wahju Tjahjo; Huda, Miftahul; Nepomuceno, Matthew
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.37752

Abstract

Business to Government (B2G) processes frequently suffer from inefficiencies caused by manual workflows and limited system integration. This study aims to enhance B2G business process performance at PT XYZ by applying the Business Process Improvement (BPI) approach using Business Process Model and Notation (BPMN) implemented through Bizagi Modeler. The research methodology involves analysing the existing process, designing an optimized process model, and conducting performance simulations based on processing time, operational costs, data accuracy, delay risk, and institutional satisfaction. The results indicate significant improvements, including a 41.7% reduction in processing time, a 26.7% decrease in operational costs, a 90% increase in data accuracy, a 40.9% reduction in delay risk, and an 85% improvement in institutional satisfaction. These findings demonstrate that the integration of BPI and BPMN effectively improves the efficiency and quality of B2G business processes in government procurement.
Religious Values Integration in STEM-R Based Science Learning: Insights From Jambi Teachers Muda, Mhd. Abror Muzakkir; Purwaningsih, Sri; Nazarudin, Nazarudin; Musli, Musli
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.37319

Abstract

The integration of religious values in STEM education remains underexplored, particularly within the context of Islamic-based schools in Indonesia. Understanding how science teachers perceive and implement such integration is crucial for developing culturally responsive pedagogy. This study aims to explore the perceptions, strategies, and challenges faced by science teachers in implementing STEM-R (Science, Technology, Engineering, Mathematics–Religious) in their classrooms. Using a qualitative descriptive method, data were collected through in-depth interviews, classroom observations, and document analysis involving selected science teachers from Islamic-based senior high schools. Visual clustering and thematic analysis were employed to interpret data. The study focused on identifying emotional responses, instructional strategies, reflective practices, and perceived student outcomes related to the STEM-R approach. Findings indicate that teachers perceive STEM-R positively, describing it as spiritually meaningful and pedagogically enriching. The study concludes that STEM-R facilitates holistic education by integrating scientific understanding with ethical and spiritual development. This research contributes to the field by offering empirical insight into STEM-R implementation and proposing a practical model for faith-integrated STEM pedagogy in religious education contexts.
The Effect of Seawater and Sea Sand Composition Ratio on the Characterization of Voltage and Electric Current Diana, Riztamala; Wulandari, Daya; Oktadina, Putri Afifa Nur; Darojat, Roviu
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.37799

Abstract

The limited availability of fossil fuels and their environmental impacts have encouraged the development of more environmentally friendly alternative energy sources. One of the methods of renewable energy is to utilize seawater and sea sand. This research aims to analyze seawater and sea sand in generating electrical energy. Source of seawater and sea sand from Tongachi Beach Bangka Belitung Indonesia. The research method was mixing seawater and sea sand with a ratio of 100:0%, 70:30%, 50:50%, 30:70%, dan 0:100%.  Measure the seawater according to the percentage 100%, 70%, 50%, 30% and 0%. Then Weigh the sea sand according to the percentage ratio 0%, 30%, 50%, 70% and 100%.  Add the seawater and sea sand to the mixing container according to the weighed ratio. The electrical energy generated is determined by observing the current flow and power are seen on the multimeter. The results showed that the composition ratio of 100:0 % seawater and sea with a voltage of 0.67 V, an electrical current of 0.2 mA and a power of 0.134 watts. It has of the analysis of the composition of seawater and sea sand can potentially be used as a source of electrical energy.                           
Development of an Ultrasonic Pest Repellent System Based on ESP32 and the Internet of Things (IoT) Fatimah, Siti; Lestari, Inda; Lestari, Cyndi; Larita, Nadia Putri; Husniyah, Dini Milatul; Sinensis, Arini Rosa; Firdaus, Thoha
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.37949

Abstract

Pest attacks on agricultural land often result in a significant decrease in crop yields. This study aims to develop an IoT-based pest repellent system integrating ultrasonic waves and remote control. The method involves an ESP32 microcontroller, a PIR sensor, and a PAM8403 amplifier with a piezoelectric tweeter. The system was evaluated through laboratory calibration and real-field implementation in East OKU. This device features automatic mode (ultrasonic triggers >20 kHz) and manual mode via the Blynk application. Quantitative results show a maximum detection range of 5 meters with a 110-degree coverage angle. The system achieves a stable 30 kHz output and real-time notifications with an average latency of less than 1 second. IoT integration enables farmers to monitor and control the device remotely, increasing crop protection efficiency in dynamic rice field environments.
Sugar Price Prediction in East Java Using the Geometric Brownian Motion Model Hasanah, Amaliyatul
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.37063

Abstract

Sugar is a national strategic commodity that plays a vital role in Indonesia's economic stability and food security. East Java, as a major sugar producer, faces fluctuating price dynamics due to various factors, including sugarcane production, supply distribution, refined sugar imports, weather conditions, and the needs of the food and beverage industry. To understand the random price movement patterns, the Geometric Brownian Motion (GBM) model is used because it is able to represent price dynamics through log-normal drift and volatility components. This study aims to predict sugar prices in East Java using the Geometric Brownian Motion (GBM) model to provide insight into price uncertainty and volatility. The study population consists of daily sugar price data in East Java in August-November 2025, with August-October 2025 data as training data and November 2025 data as testing data. Sugar price prediction uses a stochastic modeling approach, implementing GBM through multi-path simulations to capture the shift and volatility parameters of sugar price movements. Sugar price prediction using the GBM model is carried out with 50, 500, and 1000 iterations (paths). The results obtained from the GBM model effectively capture the inherent volatility of sugar prices, producing a Mean Absolute Percentage Error (MAPE) value of 0.0846% for 50 trajectories, 0.0659% for 500 trajectories, and 0.0522% for 1,000 trajectories. These results indicate that the GBM can model sugar price fluctuations in East Java and provide accurate probabilistic estimates.
Geo-Immersive Learning: A Design Thinking Approach to Virtual Reality for Analyzing Multicultural Social Spaces Khalidy, Diky Al; Gastama, Aulia Nindy Fadila; Salsabila, Balqis; Utomo, Dwiyono Hari; Asshagab, Sri Milawati; Febriansyah, Abid; Yembuu, Batchuluun; Thang, Ha Van
Justek : Jurnal Sains dan Teknologi Vol 9, No 1 (2026): March
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v9i1.38084

Abstract

Visualizing abstract concepts in Human Geography is challenging, and current Virtual Reality (VR) applications primarily address physical phenomena rather than social dynamics. To bridge this gap, this study aims to develop and evaluate VR-based learning media for the “Population Dynamics and Social Groups” material. The research employs a Research and Development (R&D) design using the Design Thinking model, which consists of five stages: Empathize, Define, Ideate, Prototype, and Test. The development process emphasizes the novelty of integrating technical geospatial data, specifically astronomical coordinates and elevation, with a sociological analysis of three multicultural landscapes in Malang City: Chinatown (Pecinan), the Arab Quarter (Embong Arab), and the Madurese settlement. The subject of the implementation was undergraduate students of Geography Education at Universitas Negeri Malang. Data were collected using expert validation sheets and implementation observation sheets, then analyzed using descriptive quantitative techniques. The results demonstrate that the developed VR media is highly feasible for learning purposes. The quantitative analysis from the field implementation yielded an average observation score of 62.5 (out of a maximum of 68), classifying the product into the “Very Suitable” (Category A) category. Furthermore, qualitative observations indicated a significant increase in student enthusiasm and ease of understanding regarding the spatial distribution of social groups. This study concludes that integrating geospatial data with 360-degree visualization effectively bridges the gap between theoretical knowledge and field reality, offering a robust alternative to physical field trips.

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