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Journal of Innovation in Applied Natural Science CV Media Inti Teknologi Ruko B, RT 05 RW 01 Jalan Pinang Mas, Bentiring Permai, Muara Bangkahulu, Kota Bengkulu Indonesia. 38229
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Journal of Innovation in Applied Natural Science
Published by CV Media Inti Teknologi
ISSN : -     EISSN : 31104150     DOI : https://doi.org/10.58723/jinas.v2i1.153
Core Subject : Science, Education, Agriculture, Social, Engineering,
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics
Journal of Integrated Natural Sciences (JINAS) is an academic peer-reviewed journal that publishes high-quality research in the field of natural sciences, encompassing both fundamental and applied scientific studies. The journal aims to provide a scholarly platform for researchers, academics, and practitioners to disseminate innovative findings, theoretical advancements, and practical applications that contribute to the development of scientific knowledge and technological progress. JINAS welcomes original research articles, review papers, and scientific reports that demonstrate methodological rigor and interdisciplinary relevance. The scope of JINAS covers a broad range of topics within the natural sciences, including Biological and Environmental Sciences, Chemical and Material Sciences, Physical Sciences, and Mathematical Sciences. Through these areas, the journal encourages studies that explore natural phenomena, develop scientific models and analytical approaches, and apply scientific principles to address real-world challenges. By promoting interdisciplinary collaboration and scientific exchange, JINAS seeks to support the advancement of natural science research and its contribution to sustainable development and innovation.
Arjuna Subject : Umum - Umum
Articles 25 Documents
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Optimizing Rainfall Gauge Network Density and Spacing on Ambon Island Using Thiessen Polygons and the Kagan–Rodda Approach Irenius Forisman Daba; Yahya Darmawan; Getachew Mehabie Ulualem; Widodo Widodo
Journal of Innovation in Applied Natural Science Vol. 2 No. 2 (2026): Journal of Innovation in Applied Natural Science
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/jinas.v2i2.195

Abstract

Background: Ambon Island is a small mountainous island characterized by high spatial variability of rainfall, which necessitates a representative rainfall gauge network. Aims: This study aims to evaluate the density and spatial distribution of the rainfall station network on Ambon Island based on the standards of the World Meteorological Organization (WMO) and the Kagan–Rodda method. Methods: This study uses annual rainfall data from 2014–2023 from eight stations, along with spatial data of the study area. Thiessen polygons were used to define the coverage area of each station in the rainfall station network. The network density was evaluated using WMO standards, and the relationship between distance and rainfall correlation was analyzed using the Kagan–Rodda method to estimate network error. Result: The results indicate that most stations in the rainfall station network meet WMO density standards, but their spatial distribution is still uneven. The Kagan–Rodda analysis shows that more stations are needed when a smaller error is required. At a 5% error level, three stations are enough with a spacing of about 17.12 km. At a 1% error level, about 51 stations are needed with a spacing of around 4.03 km. Conclusion: This study highlights the importance of balancing rainfall estimation accuracy with technical and practical limitations in the planning of rainfall gauge networks.
Comparative Analysis of K-Nearest Neighbor and Fuzzy K-Nearest Neighbor for Diabetes Classification Using the Pima Indians Diabetes Dataset Ulfasari Rafflesia; Siska Dwi Kumala; Ratna Widayati; Aisyah Nooravieta S.; Oon Septa
Journal of Innovation in Applied Natural Science Vol. 2 No. 2 (2026): Journal of Innovation in Applied Natural Science
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/jinas.v2i2.223

Abstract

Background of study: Diabetes mellitus remains one of the most common chronic diseases worldwide; thus, early and accurate prediction is critical for appropriate intervention. Aims: This study examines the performance of the standard K-Nearest Neighbor (KNN) method and its fuzzy counterpart, Fuzzy K-Nearest Neighbor (Fuzzy KNN), in classifying diabetes status and compares their behavior across different neighborhood sizes (k). Methods: The Pima Indians Diabetes Dataset (768 cases, 8 clinical variables) was used. Zero values in physiologically implausible attributes (glucose, blood pressure, skin thickness, insulin, and BMI) were treated as missing values based on the physiological interpretation of these variables and imputed using class-wise medians. The dataset was then split into 80% training and 20% testing subsets using stratified sampling to preserve class proportions. Five-fold cross-validation on the training set was used to determine the optimal number of neighbors (k), after which both models were evaluated on the held-out test set using accuracy, precision, recall, and F1-score. Result: The optimal k varied between models: k=15 for KNN and k=3 for Fuzzy KNN. Cross-validation accuracy across the tested k range (3–21) remained relatively stable for both methods (approximately 0.80–0.83), indicating that performance was not highly sensitive to k selection. On the test set, Fuzzy KNN outperformed conventional KNN across all evaluation metrics (accuracy: 0.779 vs. 0.773; precision: 0.679 vs. 0.673; recall: 0.704 vs. 0.685; F1-score: 0.691 vs. 0.679). Conclusion: For the Pima Indians Diabetes Dataset, Fuzzy KNN achieved slightly better performance than conventional KNN across all evaluated metrics on the held-out test set. These findings indicate that distance-based membership weighting may provide a modest advantage over crisp majority voting for diabetes classification in this dataset.
Chemical Characteristics of Bay Tat Traditional Cake at Various Levels of Foxtile Millet (Setaria italica) Flour Substitution Marietha Kristiani Br. Sinurat; Sri Wulandari; Laili Susanti; Ulfah Anis
Journal of Innovation in Applied Natural Science Vol. 2 No. 2 (2026): Journal of Innovation in Applied Natural Science
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/jinas.v2i2.227

Abstract

Background:  Foxtail millet (Setaria italica) has great potential as a substitute for wheat flour due to its favorable nutritional composition and functional properties that support the processing of various food products. The utilization of foxtail millet flour in food products is important to promote food diversification, increase the added value of local commodities, and reduce dependence on imported wheat flour. One potential application of foxtail millet flour is as a partial substitute for wheat flour in a traditional cake known as Bay Tat. However, the effect of the percentage of foxtail millet flour substitution on the chemical quality of *bay tat* cake is not yet known. Aims: This study aimed to determine the effect of different proportions of wheat flour and millet flour on the chemical quality of traditional Bay Tat cake. Methods: The study employed a Completely Randomized Design (CRD) with a single factor, namely the combination of wheat flour and foxtail millet flour in five treatments: 100% wheat flour and wheat flour substituted with 20%, 30%, 40%, and 50% foxtail millet flour. The observed parameters included moisture content, carbohydrate content, protein content, and dietary fiber content. The data were analyzed statistically using Analysis of Variance (ANOVA), followed by Duncan’s Multiple Range Test (DMRT) for parameters showing significant effects. Result: The results showed that the substitution of wheat flour with foxtail millet flour significantly affected the chemical quality of traditional Bay Tat cake. Increasing the proportion of foxtail millet flour decreased moisture content (23.12%–16.57%) and carbohydrate content (43.24%–37.97%), while protein content increased (7.88%–14.88%) and crude fiber content increased (0.61%–2.56%). Conclusion: Millet flour has the potential to be used as a substitute for wheat flour in making Bay Tat to increase protein and fiber content and support food diversification based on local commodities.
Insights into Artificial Intelligence and Ethnoscience in STEM: Systematic Literature Review (SLR) for Pre-Service Physics Teachers Yaspin Yolanda; Maison; Damris. M; Bambang Heriyadi; Imam Arif Pribadi
Journal of Innovation in Applied Natural Science Vol. 2 No. 2 (2026): Journal of Innovation in Applied Natural Science
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/jinas.v2i2.228

Abstract

Background: Integrating Artificial Intelligence (AI), ethnoscience, and STEM education is increasingly important for preparing pre-service physics teachers to address technological, interdisciplinary, and culturally responsive demands. However, research in Indonesia remains fragmented, with AI, STEM, and ethnoscience investigated as separate domains, limiting integrated approaches to physics teacher preparation. Aims: This study identifies publication trends, dominant themes, methodological characteristics, and gaps in integrating AI, ethnoscience, and STEM within Indonesian pre-service physics teacher education. Methods: Guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) framework, an integrative literature review examined publications from 2015 to 2026 from Google Scholar, IEEE Xplore, Scopus, and ERIC. Following title, abstract, and full-text screening, 51 articles were selected. Data were analyzed using descriptive bibliometrics, thematic analysis, and gap analysis. Results: Three trends emerged. First, research emphasizes AI- and STEM-enhanced learning, conceptual understanding, and 21st-century competencies. Second, ethnoscience studies promote local wisdom, contextual learning, cultural literacy, and instructional resources, but remain disconnected from AI-supported STEM learning. Third, comprehensive frameworks integrating AI, ethnoscience, and STEM for pre-service physics teacher education remain scarce. Developmental and qualitative approaches dominate existing studies, while mixed-methods, longitudinal, and intervention-based research remains limited. Gaps persist in examining pre-service teachers’ AI literacy, TPACK, prior knowledge, and capacity to design culturally contextualized STEM learning supported by AI. Conclusion: The findings reveal a research gap and provide a foundation for developing empirically validated, culturally responsive frameworks integrating AI, STEM, and ethnoscience to strengthen AI literacy, TPACK, STEM competencies, and contextual pedagogical practice in physics teacher education.  
The Quality of Ethnic Fermented Bamboo Shoots (Lemea) From Bengkulu (Indonesia) by Using Different Fermentors Devy Arum Sari; Dewi Jumiarni; Neni Murniati
Journal of Innovation in Applied Natural Science Vol. 2 No. 2 (2026): Journal of Innovation in Applied Natural Science
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/jinas.v2i2.229

Abstract

Background: Lemea is a traditional fermented food originating from Bengkulu, Indonesia, and is produced from bamboo shoots and fish. Traditionally, lemea has been fermented using various simple containers, which may affect the fermentation process and the quality of the resulting product. Differences in container materials may influence moisture retention, microbial growth, and sensory characteristics during fermentation. Aims: This study aimed to determine the effect of different fermentation vessels on the physicochemical, microbiological, and sensory characteristics of lemea. Methods: An experimental study was conducted using a Completely Randomized Design (CRD) consisting of five fermentation vessel treatments: glass jar, plastic jar, bamboo container, food-grade polypropylene (PP) plastic container, and Tupperware container. Each treatment consisted of bamboo shoots (Dendrocalamus asper) and tilapia fish (Oreochromis mossambicus) at a ratio of 2:1. The fermented products were analyzed based on moisture content, bacterial count, and sensory characteristics, including aroma, texture, and color. Results: The results showed that the type of fermentation vessel affected the quality characteristics of lemea. The highest moisture content was observed in the Tupperware treatment (40.54%), while the lowest was recorded in the plastic jar treatment (38.74%). The highest bacterial count was found in the glass jar treatment (7.0 × 10⁵ CFU/mL), whereas the lowest bacterial count was observed in the Tupperware treatment (1.1 × 10⁵ CFU/mL). Sensory evaluation showed that lemea fermented in the bamboo container received the highest preference scores for aroma and texture, while the plastic jar treatment received the highest preference score for color. Conclusion: The type of fermentation vessel influences the physicochemical, microbiological, and sensory characteristics of lemea. The findings demonstrate that fermentation vessel selection is an important factor in maintaining and improving the quality of traditional lemea products.

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