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International Journal of Science and Environment
Published by CV. Inara
ISSN : -     EISSN : 28090551     DOI : https://doi.org/10.51601/ijse.v2i4
Core Subject : Science, Education, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Mathematics Physics
International Journal of Science and Environment (IJSE) is to provide a research medium and an important reference for the advancement and dissemination of research results that support high-level research in the fields of Science and Environment . Original theoretical work and application-based studies, which contributes to a better understanding all fields of Science and Environment. The aim and scope of the journal Chemistry, Chemical Analysis, Physical Chemistry, Physics, Biology, Ecology, Biodiversity, Zoology, Biochemistry, Mathematics, Environmental Science, Agriculture, Environment, Forestry.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol. 5 No. 3 (2025): August 2025" : 7 Documents clear
Classification of Senile Cataract Disease Using Convolutional Neural Network Method and Explainable Artificial Intelligence Gumilang Hardandrito, Awan; Ulfah Siregar, Maria
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.111

Abstract

Senile cataract is a major cause of visual impairment in the elderly that requires technology-based diagnosis to improve detection efficiency and accuracy. This study aims to classify the severity of senile cataracts in eye fundus images using a deep learning ensemble model approach consisting of CNN Custom and MobileNetV2, as well as Explainable AI methods in the form of Grad-CAM. The underlying theory is the Convolutional Neural Network architecture as the image feature extraction model, plus the transfer learning principle in MobileNetV2, as well as the visual interpretation of Grad-CAM to increase the transparency of the model. The research approach is experimental, with the data coming from the Senile Cataract dataset processed through augmentation and stratified division. A Custom CNN was built with four convolution blocks while MobileNetV2 was used as the pretrained feature extractor. Both were combined in the feature fusion stage and the prediction results were visualized with Grad-CAM. The evaluation results showed that this ensemble model achieved 95.6% accuracy, 95.4% macro F1-score, and an AUC-ROC area close to 1, and provided a clinically relevant heatmap of the lens opacity area. The contribution of this research is in combining two different CNN models with an interpretive approach that bridges the need for high accuracy and transparency in image-based medical applications, with potential applications in automated diagnosis systems and future telemedicine services.
Website-Based Point of Sales (POS) Application Design Using The Laravel Framework Aji Sentosa, Edwin; Khotimah, Tutik; Mei Maharani, Rizkysari
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.188

Abstract

The data processing process at Toko Karunia in Trangkil Village still relies on manual recording. This method still poses many risks such as inaccurate product recording, slow sales reports, and a higher risk of data loss, all of which have an impact on the work efficiency of the shop owner. The purpose of this research is to solve the problem by designing a web-based Point of Sale (POS) application according to the needs of the store. The application design method uses the waterfall method with the System Development Life Cycle (SDLC) approach. The application design process in this study is carried out sequentially. Starting with requirements analysis, system design, system development, system testing, and system implementation. At the application development stage, the programming language used is PHP with the Laravel framework, with the MySql database. After the application has been designed, it will be tested through the Black Box Testing method. As a result, the main features such as login, managing categories, products, members, suppliers, transaction features, and printing reports function properly. Overall, this POS application improves all aspects such as speed, accuracy, security, and ease of accessing data. This application also strengthens Toko Karunia's position to keep competing in the digital era. Keywords: Point of sale, PHP, Waterfall, Laravel, MySql
Effect of Coarse Aggregate Dimensional Variation On The Compressive Strength of Concrete Oktavian, Yogika; Hamdani, Hafiz; Fitrayudha, Adryan
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.212

Abstract

In the world of construction, concrete has a very important function as the main material due to its role in maintaining the strength and stability of the structure. This study aims to evaluate the effect of coarse aggregate size variations on the compressive strength of concrete and determine the most suitable size for use. The use of coarse aggregates is focused on granules that are retained on 3/4-inch and 3/8-inch sieves. The results showed that concrete with coarse aggregate retained in a 3/8 inch sieve had a higher compressive strength than 3/4 inch aggregate. At 3 days of age, the average compressive strength value reached 12,078 MPa for 3/8 inch coarse aggregate and 10,587 MPa for 3/4 inch aggregate. This difference continued at the 28-day lifetime compressive strength (the result of the 1971 PBI conversion), which was with an average value of 30,296 MPa for a 3/8 inch aggregate and 26,469 MPa for a 3/4 inch aggregate. This difference is due to a tighter distribution of patricles, reduced pore volume, and more optimal bonding of cement paste and aggregate. Therefore, the selection of coarse aggregate sizes needs to be adjusted to the purpose of construction.
Isolation And Characterization of Trichoderma Sp. And Its Antagonism Activity Against Fusarium Wilt In Shallots Mudi, La; Abidin, Zainal; Maratul Hamidah, Ida; Ahmad Gyn’nandi, Helmi; Rusmini, Rusmini; Rita Manullang, Riama; Lisnawati, Andi; Ayu Kade Sutariati, Gusti
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.166

Abstract

Moler disease in shallots, particularly during the rainy season, caused a significant decline in production. As a solution, biological control using indigenous Trichoderma sp. was needed, as it functioned both as a biocontrol agent and a plant growth promoter. This study aimed to isolate and characterize Trichoderma sp. from the BTP Study Program Pilot Garden and to evaluate its antagonistic potential against moler disease in vitro. The research was conducted at the Agronomy Laboratory of Samarinda State Agricultural Polytechnic from July to August 2024. Observed variables included macroscopic and microscopic characteristics, as well as inhibition tests. Characterization data were analyzed descriptively, while inhibition test results were analyzed using analysis of variance (ANOVA), followed by a P-value of 0.05. Based on the isolation results, four isolates of Trichoderma sp. were isolated from the vegetation of palm oil plants, rubber plants, and pepper plants, exhibiting morphologically and microscopically distinct characteristics. Based on the morphological and microscopic characters, the TP2 isolate was suspected to be Trichoderma sp., the TH2 isolate was identified as T. hamatum, the TE1 isolate was assumed to be T. harzianum, and the TE2 isolate was thought to be T. koningi. The results of the antagonist test showed that the Trichoderma sp. isolates could act as biological controllers, as shown by the inhibition test results ranging from 35.16% to 69.46%. These findings indicated that the indigenous Trichoderma isolates had promising potential as biological control agents and could be further developed for field application to manage moler disease in shallots effectively.
Analysis of Rice Husks and Sugarcane Bagasse for Water Treatment of Formation Water in Oil Fields Fattahanisa, Aqlyna; Satiawati, Listiana; Samura, Lisa
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.180

Abstract

In the oil and gas production process in the Cepu field, oil, gas, and water are produced. After oil and gas are produced from the reservoir to the surface, the water that is produced will be returned to the environment. In this water, there is a relatively small amount of oil, high total dissolved solids (TDS), and low pH. High TDS can cause hardness in the water to increase, pH that is too acidic and alkaline can cause pollution to the environment, also residual oil in the water can damage the environment because it is difficult to combine and difficult to decompose. Therefore, this problem can be overcome one way by the adsorption process. This research aims to test absorption using an adsorbent in the form of activated carbon. This adsorption uses sugar cane bagasse and rice husks which can be obtained at low prices and also in abundance. Several stages carried out in this research were making activated carbon by drying the bagasse and rice husks, then blending it until smooth, then placing it in a furnace at a temperature of 800℃. Produced water in Cepu has a TDS value of 5100 ppm and a pH of 5. By adding sugarcane bagasse and rice husk adsorbent the pH value becomes 7, then the TDS value becomes 2261 ppm after adding 3 grams of rice husk adsorbent. and the TDS value became 1153 ppm with the addition of 3 grams of sugarcane bagasse adsorbent. The results of this research provide evidence of the effectiveness of sugarcane bagasse and rice husks as adsorbents in reducing TDS values, pH, and absorbing residual oil from produced water so that it complies with the quality standards of Minister of Environment Regulation (PermenLH) Number 19 of 2010.
Exploration of Antifungal Tests Based on Δ-Guaiene From Subang Patchouli Oil Rahmawati, Rahmi; Nurjanah, Sarifah; Rialita, Tita; Mardawati, Efri; Filianty, Fitry
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.194

Abstract

Guaiene is a derivative compound produced as a byproduct in the production of patchouli alcohol from patchouli oil (Pogostemon cablin Benth.). This study aims to evaluate the antifungal activity of δ-guaiene extracted from patchouli oil originating from Subang against four types of skin pathogenic fungi: Aspergillus niger, Candida albicans, Microsporum gypseum, and Trichophyton mentagrophytes. The method used was a laboratory experiment, with the main parameters observed including Inhibition Zone Diameter (IZD), Minimum Inhibitory Concentration (MIC), and Minimum Fungicidal Concentration (MFC). The results showed that δ-guaiene inhibited the growth of C. albicans at a concentration of 40%, with an IZD of 0.15 mm. Against A. niger, the compound demonstrated an inhibition zone of 1.4 mm at a 20% concentration and had an MFC of 20%. For T. mentagrophytes, an IZD of 0.4 mm was observed, with both MIC and MFC at 20%. Activity against gypseum showed an IZD of 0.25 mm, with MIC and MFC also at 20%. These findings suggest that δ-guaiene from patchouli oil has potential as a candidate antifungal agent derived from local resources, supporting the development of natural bioactive compounds and sustainability.
Land Use Changes of Paddy Fields in Karangmalang Subdistrict, Sragen Regency in 2014 and 2024 Husyain Rifai, Muh.
International Journal of Science and Environment (IJSE) Vol. 5 No. 3 (2025): August 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i3.198

Abstract

Population growth has led to an increased demand for housing needs and public facilities, ultimately placing pressure on land availability. This condition causes some agricultural land to convert into non-agricultural land. This study aims to determine the changes of paddy fields that occurred in Karangmalang Subdistrict, Sragen Regency in 2014 and 2024. To obtain image data, the researchers used image interpretation and digitalization techniques on Landsat 8 images in 2014 and Sentinel-2 L2A images in 2024, followed by an overlay process on the 2014 and 2024 land use maps to determine changes in the use of paddy fields in Karangmalang Subdistrict in 2014 & 2024. The results of this study found that the use of paddy fields in Karangmalang Subdistrict between 2014 to 2024 showed a decrease in area from 2964.19 ha to 2864.08 ha, or a decrease of about 100.10 ha.

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