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AL-ULUM: JURNAL SAINS DAN TEKNOLOGI
Published by Universitas Islam Kalimantan Muhammad Arsyad Al Banjari
ISSN : -     EISSN : 24774731     DOI : 10.31602
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Energy
Al Ulum: Jurnal Sains dan Teknologi = Al Ulum: Journal of Science and Technology (JST) is an international and open access journal with registered number ISSN 2477-4731 (Online). JST is a peer-reviewed journal published three times a year (April, August and December) by UPT Publication and Journal Management, Islamic University of Kalimantan. JST is intended to be the journal for publishing articles reporting the results of science and technology research. The JST invites manuscripts in the various topics of science and technology include natural sciences, engineering, computer science and technology, health and medical sciences, and agriculture.
Arjuna Subject : Umum - Umum
Articles 235 Documents
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Front Matter Al Ulum: Journal of Science and Technology Vol. 11, No. 2, August 2025 Front Matter
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 11, No 2 (2025)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

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Abstract

ON THE KERNEL METHOD COMPARED TO THE MATRIX INVERSION METHOD FOR PASSING FROM A DUAL BASIS TO THE BASIS OF A VECTOR SPACE Michael Kilela Makiese; Pongo Ngentshi Benoit; Milolo Kanimuambidi Lea-Irene; Bompoma Elese Ruphin; Mubikayi Kabumvu Serge
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 11, No 2 (2025)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v11i2.19337

Abstract

In this work, we study and compare two methods for passing from a dual basis to the basis of a finite-dimensional vector space by recalling the passage from a basis to its dual. For the inverse transition, we clarify the kernel method for linear forms and the matrix inversion method, the former exploiting the properties of linear forms and orthogonality, while the latter relies on the explicit inversion of transition matrices, with remarks for each approach depending on the context of application. The study shows that, although matrix inversion is a more direct method, the kernel method can offer a more elegant and efficient alternative in certain cases, especially when the vector space has particular structures.
BUSINESS ANALYSIS OF PLANT GROWTH-PROMOTING RHIZOBACTERIA (PGPR) PRODUCTION AT CV. BANUA SEJAHTERA LESTARI IN DANAU KARYA VILLAGE, BARITO KUALA REGENCY Alpiani Alpiani; Ana Zuraida; Fuzi Maulana Ash’ari
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 11, No 2 (2025)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v11i2.19357

Abstract

This study investigates the technical and economic aspects of Plant Growth-Promoting Rhizobacteria (PGPR) production at CV. Banua Sejahtera Lestari in Danau Karya Village. Using a case study approach, the analysis covers production methods, cost structure, profitability, and operational challenges. PGPR production follows strict Standard Operating Procedures (SOP), utilizing laboratory-grade equipment in hygienic conditions under supervision by qualified personnel. Each cycle spans 15 days and is repeated twice monthly, yielding 200 liters per cycle. The production cost per cycle is IDR 2,600,000, while revenue reaches IDR 4,000,000, resulting in a net profit of IDR 1,400,000. The Return Cost Ratio (RCR) of 1.53 indicates economic feasibility and a favorable return on investment. Challenges include maintaining consistent product quality and managing production risks. Overall, PGPR production at CV. Banua Sejahtera Lestari demonstrates strong potential for sustainable agribusiness development in Barito Kuala Regency.
ANTIBACTERIAL ACTIVITY OF METHANOL EXTRACT FROM INGGILI FRUIT (Xylocarpus granatum) AGAINST Propionibacterium acnes AND Escherichia coli USING WELL DIFFUSION METHOD Wahyu Isnaini Nurhidayanti; Achmad Kadri Ansyori; Reksi Sundu
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 9, No 3 (2023)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v9i3.12155

Abstract

Inggili is a type of mangrove plant that has been traditionally used by the community for medicine. It contains many active compounds that function as antibacterials. Based on empirical data, inggili fruit is used to remove acne on the skin and diarrheal diseases. This study aims to determine the antibacterial activity of methanol extract of inggili pulp in inhibiting Propionibacterium acnes and Escherichia coli bacteria using the sumuran diffusion method. The research conducted is experimental. The object under study was the antibacterial activity of inggili fruit extract against Propionibacterium acnes and Escherichia coli bacteria. Antibacterial activity was tested using the sumuran diffusion method with extract concentrations of 10%, 15%, and 20%. The negative control used was 1% DMSO and the positive control used was 0.1% chloramphenicol
COMPARATIVE INCOME ANALYSIS OF RICE FARMING (Oryza sativa L.) USING CERTIFIED AND NON-CERTIFIED CIHERANG SEED VARIETIES Rudianoor Rudianoor; Ana Zuraida; Inda Ilma Ifada
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 11, No 2 (2025)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v11i2.19903

Abstract

This study evaluates the financial performance of Ciherang rice farming using certified and non-certified seeds in Ulu Benteng, Marabahan Subdistrict. Cultivation follows standard agronomic practices such as seedbed preparation, planting (tegel system), fertilization, and harvesting. Certified seed farming incurs explicit and implicit costs of IDR 4,924,024 and IDR 4,221,471 respectively, yielding revenue of IDR 15,026,477, with income of IDR 10,102,465 and profit of IDR 5,880,976. In contrast, non-certified seed farming incurs slightly lower costs (IDR 4,567,240 and IDR 4,098,846), but generates lower revenue (IDR 12,577,846), income (IDR 7,748,308), and profit (IDR 3,911,760). The profit gap of IDR 1,969,216 confirms that certified seeds deliver better financial outcomes, supporting their use to enhance farm profitability and sustainability.
ANTIDEPRESSANT ACTIVITY TEST OF RED BETEL LEAF ETHANOL EXTRACT (Piper crocatum) ON MALE WHITE MICE (Mus musculus) USING THE FORCED SWIM TEST METHOD Triswanto Sentat; Anita Apriliana; Siti Lili Rizki Sari; Novi Milasari; Ghina Adhila; Rizki Rahmadi Pratama; M. Hasan Andryanto
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 11, No 2 (2025)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v11i2.18542

Abstract

Red betel leaves (Piper crocatum) contain flavonoids, alkaloids, polyphenols, tannins, and which is known for its antidepressant properties. The purpose of this study was to determine the effect of antidepressant activity of ethanol extract of red betel leaves on male white mice (Mus musculus) orally. The method used in testing antidepressants is the Forced Swim Test. Fifteen mice were divided into five groups: a positive control group receiving 3.5 mg/kg BW amitriptyline, a negative control group, and three groups receiving 200, 400, and 800 mg/kg BW of the extract. The antidepressant effect was measured by observing the immobility of mice during swimming. The results of the study using paired sample t-Test analysis showed that there was a difference in immobility before and after, in the 400 mg/kg BW extract and 3.5 mg/kg BW amitriptyline dose groups had significant differences.
ANALYSIS AIRCRAFT COMPONENTS INDUSTRY RECOVERY IN INDONESIA: INTEGRATION OF DELPHI - INTERPRETIVE STRUCTURAL MODELING (ISM) Jupriyanto Jupriyanto; I Nengah Putra; A. K. Susilo
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12, No 1 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i1.22960

Abstract

This study aims to analyze key factors for industrial recovery by identifying and modeling important factors for the recovery of the Indonesian aircraft component industry using a qualitative descriptive statistical method approach with eight experts. The Delphi method and Interpretive Structural Modeling (ISM) were used in this study to obtain expert consensus and map causal and hierarchical relationships between factors. The main findings reveal that key factors for industrial recovery fall into four groups: autonomous, interconnected, dependent, and driving. Furthermore, the findings reveal five hierarchical levels of relationships among recovery factors in the aircraft component industry. The order of practical application of industrial recovery factors ascends from level five to level one.
ON STOCHASTIC LINEAR PROGRAMMING AND ITS APPLICATION IN AGRO-PASTORALISM Ngombo Tsasa Lutete Adèle; Bukweli Kyemba J.D; Lungiambudila Mamona O; Mabela Makengo Matendo Rostin
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12, No 1 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i1.21735

Abstract

Stochastic linear programming (SLP) is a robust method for optimization under uncertainty. This study applies SLP to livestock feed formulation, aiming to minimize costs while meeting nutritional requirements with probabilistic constraints. The model considers ten ingredients Ai with costs ci and five nutrients Jj. Minimum nutrient levels are set with given probabilities, and deterministic equivalents are derived using quantiles of three distribution laws: normal, uniform, and exponential. MATLAB analysis indicates that uniform and exponential distributions yield the most efficient input combinations for minimal cost. These results show how distributional assumptions affect optimal solutions and demonstrate the practical value of incorporating uncertainty into feed production. The study contributes to the literature on SLP in agriculture and economics, offering decision-makers strategies to balance cost efficiency with nutritional adequacy.
PHYTOCHEMICAL SCREENING AND DPPH ANTIOXIDANT ACTIVITY OF Cleome viscosa FRACTIONS, A TRADITIONAL MEDICINAL PLANT FROM SOUTHEAST SULAWESI Imran Imran; Nely Aryani Agusrini; Muh K. Natsir; Thamrin Azis; Alwahab Alwahab; Muh Edihar
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12, No 1 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i1.22971

Abstract

Cleome viscosa is a traditional medicinal plant known to contain bioactive antioxidant compounds. Accordingly, this study aimed to conduct phytochemical screening and evaluate the antioxidant activity of its methanolic extract and solvent fractions using the DPPH radical scavenging method. Extraction was performed by maceration with methanol, followed by liquid–liquid partitioning with n-hexane and ethyl acetate. Following extraction, phytochemical analysis indicated the presence of alkaloids, flavonoids, saponins, tannins, steroids, and terpenoids in the methanolic extract. To assess antioxidant potential, antioxidant activity was determined based on percentage inhibition at 517 nm, and IC50 values were calculated by linear regression. The results showed that ascorbic acid had very strong activity (IC50 = 3.86 ppm). In comparison, the ethyl acetate fraction exhibited strong antioxidant activity (IC50 = 29.25 ppm), while the n-hexane fraction showed weak activity (IC50 = 88.77 ppm). These findings suggest that semi-polar compounds contribute significantly to antioxidant potential.
SPAN-LEVEL ASPECT-BASED SENTIMENT TRIPLET ANALYSIS IN GOVERNMENT APPLICATION REVIEWS Feza Raffa Arnanda; Lya Hulliyyatus Suadaa; Avi Rudianita Indah Dg Widya; Setia Irham Pramana
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 12, No 1 (2026)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v12i1.22767

Abstract

The government is enhancing digital public services through mobile applications in line with the Electronic-Based Government System (SPBE) 2018–2025 vision. To support continuous innovation, the Ministry of Administrative and Bureaucratic Reform (Kemenpan-RB) organize the Public Service Innovation Competition (KIPP). Understanding user complaints is essential, and aspect-based sentiment analysis, particularly Span-Level Aspect Sentiment Triplet Extraction (Span-ASTE), was applied to analyze government app reviews. A domain-specific dataset was developed with a Cohen’s Kappa of 0.817, indicating strong annotation reliability. IndoBERT-large achieved the highest F1-score of 0.76, while IndoBERT-lite-base provided an efficient alternative with an F1-score of 0.727. An aspect categorization model reached 0.86 accuracy. These models aim to improve public services, strengthen SPBE implementation, and enhance Indonesia’s E-Government Development Index ranking.

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