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PENDIPA Journal of Science Education
Published by Universitas Bengkulu
ISSN : 20869363     EISSN : 26229307     DOI : -
Core Subject : Science, Education,
Chemistry Education Mathematics
PENDIPA Journal of Science Education is a peer-reviewed, open-access journal covered all aspect of science and science education. PENDIPA journal welcomes the submission of scientific articles related to mathematics, physics, chemistry, biology, and its educational implementation in a school, higher education and other educational institution. We encourage scientist, lecturer, teacher and student to submit their original paper to the journal. PENDIPA journal is published by Graduate School of Science Education - University of Bengkulu, three times a year on February, June and October
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Articles 45 Documents
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Search results for , issue "Vol 9 No 3 (2025): October" : 45 Documents clear
Pengembangan Instrumen Literasi Sains Kontekstual Bencana Alam (Gempa Bumi dan Gunung Api) : Development of Contextual Science Literacy Instruments for Natural Disasters (Earthquakes and Volcanoes) Nuryanti, Alimah; Kaniawati, Ida; Suwarma, Irma Rahma
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.718-725

Abstract

This study aimed to develop a valid and reliable scientific literacy test instrument for seventh-grade junior high school students on earthquakes and volcanoes. The method used is Research and Development with a 4D model, which includes the stages of define, design, develop, and disseminate. The research subjects consisted of 30 junior high school students. The development data were analyzed to assess the validity, reliability, difficulty level, and discriminatory power of the instrument. The development procedure included planning, preparation of the initial draft, validation of content and construct by experts through the suitability of scientific literacy indicators with the test items, followed by field trials, revisions, and implementation of the instrument. Based on 15 test items prepared, 13 were declared valid, one was revised, and one was not used. The analysis results showed the reliability of the instrument with a KR-20 coefficient of 0.76 which is included in the high category. The level of difficulty of the questions consisted of 12 items in the medium category and 3 items in the easy category, while the discriminatory power of all questions was in the very good to good category.
Perancangan Filter Pasif Pada Gardu Traksi di Stasiun Citayam Guna Mengurangi Efek Distorsi Harmonisa Putri Jori, Rahmatika Dwi; Sari, Nurwanda; Desliana, Lulu Syahira; Maulidina, Siti; Mardhotillah, Nur Anisa; Arif, Muhammad Rizki; Aini, Nur Syahidah
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.742-751

Abstract

Electric Rail Trains (KRL) have become the most frequently used transportation mode for daily activities in the community. One of the existing problems within the operation system of Electric Rail Trains (KRL) lies in the current rectification process. During this rectification process, an effect occurs that can cause disturbances in the KRL's electrical system. This resulting effect is the harmonic effect. This study aims to address the problem of power quality degradation in the Electric Rail Train (KRL) at the Citayam Station Traction Substation, which is caused by this harmonic effect. The harmonic effect arises from the process of rectifying alternating current (AC) into direct current (DC) using a silicon rectifier, which can lead to voltage drop, speed reduction, or even the operational stoppage of the KRL.The research method used is quantitative descriptive. The study did not conduct direct measurements but instead used averaged assumption data from three related journals as primary data. The data analyzed were the values of Total Harmonic Distortion (THD) for both current and voltage, particularly focusing on the 5th, 7th, and 11th harmonic orders, which were identified as the highest contributors to the harmonic distortion. To mitigate the harmonics, this study designed a single-tuned passive filter using the ETAP (Electric Transient Analysis Program) software. The design aims to suppress the harmonic distortion, thereby improving the electrical power quality, maintaining the reliability of the traction substation, and optimizing KRL operations. The single-tuned passive filter designed in this research was capable of suppressing harmonics by up to 0.009%.
Pemanfaatan Teknologi Pesawat Udara Tanpa Awak dalam Deteksi Pengedaran Narkoba di Selat Sunda Putri, Cintya Yelena; Supriyadi, Asep Adang; Ras, Abdul Rivai
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.752-763

Abstract

Drugs trafficking via Indonesia's sea routes continues to increase, making the Sunda Strait one of the most vulnerable points for inter-island smuggling. Conventional surveillance using patrol boats is often ineffective due to limitations in range, weather, and response time. This study was conducted to evaluate the potential and effectiveness of utilizing Unmanned Aerial Vehicle (UAV) technology in detecting and preventing drug trafficking in the Sunda Strait maritime region. The study used a qualitative approach through a Systematic Literature Review (SLR) that examined previous research results, national policies, and the implementation of UAVs in maritime security. The analysis was carried out by grouping the findings into four main themes, namely the effectiveness of UAVs in maritime surveillance, technical and operational constraints, integration with national security systems, and institutional policies and regulations. The results of the study show that UAVs can double the effectiveness of surveillance through real-time visual detection capabilities, wide coverage, and integration with radar and AIS systems. However, technical challenges such as battery life, extreme weather, and operator limitations still need to be overcome. The study concludes that the integrated application of UAVs, supported by strong institutional policies, can strengthen the national maritime security system and narrow the space for drug smuggling networks in the Sunda Strait.
Pengaruh Pengaruh Model Pembelajaran OIDDE Berbasis SETS Terhadap Kemampuan Pemecahan Masalah Peserta Didik pada Materi Ekologi Silfia Hani, Ziyan; Sjaifuddin, Sjaifuddin; Taufik, Annisa Novianti
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.768-774

Abstract

This study aimed to determine the effect of the SETS-based OIDDE model on students' problem-solving abilities in ecology material. This type of research is a quasi-experimental study with a non-equivalent control design group method involving class VIIC as the experimental class and class VIIK as the control class as samples taken randomly through random sampling techniques. The instruments used to support this research data consist of problem-solving ability test instruments in the form of essay questions, test instruments including validation questionnaire sheets, model implementation observation sheets and student response questionnaire sheets. The results of the study with a hypothesis test using Mann Whitney showed results of 0.000 <0.05 which indicated the acceptance of H1 and the rejection of H0. These results indicate that the SETS-based OIDDE model has an effect on students' problem-solving abilities.
ANALISIS PERTANYAAN PADA BUKU TEKS IPA SMP KURIKULUM MERDEKA BERDASARKAN QUESTION CATEGORY SYSTEM FOR SCIENCE (QCSS) PADA KONSEP GERAK DAN GAYA Afia, Kholifa Nur; Hodijah, Siti Romlah Noer; Rohimah, Rt. Bai
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.775-780

Abstract

This study aimed to analyze the classification and distribution of questions in two Grade VII science textbooks under the Merdeka Curriculum on the topic of motion and force, published by Kemendikbudristek (2021) and Erlangga. The research employed a qualitative method with a content analysis approach, focusing on categorizing questions based on the Question Category System for Science (QCSS), which distinguishes four levels of thinking skills: cognitive memory, convergent, divergent, and evaluative. The data consisted of 103 questions identified from both textbooks and were supported by preliminary interviews with junior high school science teachers. The findings indicate that both textbooks consistently place convergent thinking as the dominant category, with 70% in Kemendikbudristek and 71.83% in Erlangga. However, significant differences emerge in higher-order thinking skills: the Kemendikbudristek textbook emphasizes divergent questions (61.53%) that encourage creativity and idea exploration, while the Erlangga textbook prioritizes evaluative questions (77.77%) that strengthen critical reasoning and decision-making. These findings reveal different pedagogical orientations, with Kemendikbudristek focusing more on fostering creativity and exploration, while Erlangga emphasizes critical thinking skills. In conclusion, both textbooks are relevant in fostering convergent thinking skills, yet a balanced proportion of divergent and evaluative questions is needed to comprehensively support students’ critical, creative, and scientific thinking in accordance with the demands of 21st-century learning.
Penerapan Model Pembelajaran Inquiry Berbantuan Media Handout Untuk Meningkatkan Hasil Belajar Siswa Pada Materi Struktur Atom Kelas X SMA Napitupulu, Even; Simanjuntak, Hendra; Manurung, Hisar Marulitua
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.764-768

Abstract

This study aims to determine the effect of implementing the inquiry learning model assisted by handout media to improve student learning outcomes in atomic structure material for class X of SMA Negeri 1 Girsang Sipanganbolon. The type of research used is a quasi-experimental study with a pretest-posttest control group design. The research subjects consisted of two classes, namely the experimental class that received learning with inquiry learning models assisted by handout media and the control class that received conventional learning. The research instrument was a learning outcome test given before and after treatment. Data were analyzed using t-test and N-Gain calculations. The results showed that the average pretest scores of both classes were relatively the same. After learning, the average post-test score of the experimental class increased higher than the control class. The average N-Gain score of the experimental class was at 54% in the quite effective category, while the control class was at 21% in the ineffective category. The results of the t-test showed a significance value of p <0.05, which means there was a significant difference between the learning outcomes of the two classes. Thus, it can be concluded that the application of the inquiry learning model assisted by handouts improves student learning outcomes in atomic structure.
Peralihan Bahan Bakar Cofiring Batubara - Biomassa untuk Mengurangi Dampak Lingkungan: Studi Kasus PLTU Bukit Asam, Sumatera Selatan Widanti, Feraliza; Boedoyo, M. Sidik; Murtiana, Sri
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.781-789

Abstract

This study explores the implementation of coal and biomass co-firing at the Bukit Asam Power Plant in South Sumatra as a strategy to reduce the environmental impact of coal usage. Indonesia's coal resources are estimated to reach 104 billion tons, with domestic production in 2010 amounting to 240 million tons. The majority of coal is used for electricity generation, but global demand has experienced fluctuations, with declines in developed countries but significant growth in Asian countries. Coal, as a fossil fuel, has negative impacts on health and the environment, prompting the search for cleaner solutions like co-firing. Co-firing is the process of burning a mixture of coal and biomass, aimed at reducing greenhouse gas and pollutant emissions. The Bukit Asam Power Plant utilizes various types of biomass, such as rice husks and palm oil waste, with the appropriate biomass ratio for operational efficiency. This research shows that co-firing can significantly reduce CO₂, SO₂, and NOₓ emissions, as well as provide local economic benefits by empowering communities through biomass utilization. These findings are relevant to Indonesia's energy and environmental policies, supporting the transition towards more sustainable energy, and providing recommendations for policymakers in developing climate change mitigation strategies in the energy sector.
Pengaruh Kombinasi Penggunaan Pestisida Nabati Daun Langsat (Lansium domesticum) dan Daun Mimba (Azadirachta indica A.Juss) Terhadap Intensitas Serangan Serangga Hama Pada Tanaman Sawi Hijau (Brassica juncea L.): - Halefi, Adinda Jihan; Lumowa, Sonja Vera Tineke; Herliani; Maasawet, Elsje Theodora
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.790-793

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh kombinasi ekstrak daun langsat (Lansium domesticum) dan daun mimba (Azadirachta indica A. Juss) terhadap intensitas serangan serangga hama pada tanaman sawi hijau (Brassica juncea L.), serta menentukan konsentrasi yang paling efektif. Penelitian dilakukan secara eksperimental menggunakan Rancangan Acak Kelompok (RAK) dengan lima perlakuan (kontrol, konsentrasi 15%, 30%, 45%, dan 60%) masing-masing lima ulangan, sehingga total terdapat 125 tanaman sampel. Aplikasi pestisida nabati dilakukan mulai umur tanaman 7 hari dan diulang dua kali seminggu. Data intensitas serangan hama dianalisis menggunakan ANOVA, dilanjutkan dengan uji Beda Nyata Terkecil (BNT) pada taraf 1%. Hasil penelitian menunjukkan bahwa pemberian kombinasi ekstrak daun langsat dan daun mimba berpengaruh nyata terhadap penurunan intensitas serangan hama pada semua waktu pengamatan. Konsentrasi 60% menghasilkan penurunan intensitas serangan paling signifikan dibandingkan perlakuan lain, dengan rata-rata intensitas serangan pada kategori ringan. Disimpulkan bahwa kombinasi ekstrak daun langsat dan daun mimba berpotensi sebagai pestisida nabati efektif dan ramah lingkungan dalam mengendalikan hama pada tanaman sawi hijau.
Pengembangan Sistem Digital Image Colorimetry (DIC) Untuk Pemantauan Polutan Nitrogen Di Perairan Mulia Ramadhani, Adella; Dono Wilopo, Mukti; Johan, Yar; Iresta Wardani, Firdha; Firdaus, M. Lutfi
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.794-800

Abstract

The presence of ammonia in waters needs to be monitored because of its toxic nature, especially in the form of free ammonia (NH₃). High concentrations of free ammonia can disrupt the balance of aquatic ecosystems, reduce dissolved oxygen levels, inhibit the growth of aquatic organisms, and even cause mass mortality in fish and other biota. The purpose of this study is to build the Digital Image Colorimetry system for detecting ammonia and assess the accuracy of the DIC method compared to the well-known established spectrophotometric method. Analysis from 5 locations of saline water, salinity and pH levels were still within normal limits, ranging from 33-34 ppt for salinity, while pH is 7.5-7.9. The ammonia content at the sampling point was still considered safe, in accordance with the quality standard (0.3 ppm). The results of ammonia concentration measurements using the DIC method and the spectrophotometric method show a neglegible level of difference and have an accuracy value above 90%. These findings indicate that DIC can be used as an alternative method for measuring ammonia, especially for rapid analysis in the field.
The PENGARUH METODE LEARNING BY DOING TERHADAP KEMAMPUAN PEMECAHAN MASALAH PADA MATERI GERAK DAN GAYA PADA KURIKULUM MERDEKA Akbar, Rizki; R. Ahmad Zaky El Islami; Annisa Novianti Taufik
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.801-806

Abstract

This study aims to determine the effect of the learning by doing method on students' problem-solving abilities on the material of motion and force in the Merdeka curriculum. The learning-by-doing method was chosen because it emphasizes learning through direct experience, which is expected to increase students' active involvement and problem-solving skills. This study used a quasi-experimental design with the Pretest-Posttest Nonequivalent Control Group Design approach, involving two classes of junior high school students, namely the experimental class using the learning by doing method and the control class using the lecture method. The research instruments consisted of a problem-solving ability test in essay form, observation sheets, and student response questionnaires. The results showed that the learning by doing method had a significant effect on improving students' problem-solving abilities according to the independent sample t-test, producing a significance value of 0.01 (<0.05), which indicated that H0 was rejected and H1 was accepted.

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