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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 382 Documents
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Daily Stock Price Forecasting of PT Astra Agro Lestari (AALI) Using Arima and Arch-Garch Models Rizki Amelia, Azizah; Nurhaliza, Siti; Cantika Dewi, Zhakira; Rifai, Agus
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.423

Abstract

The capital market serves as a vital investment channel where stock prices exhibit dynamic fluctuations influenced by macroeconomic factors and market sentiments. This study estimates daily stock prices of PT Astra Agro Lestari Tbk (AALI), a leading palm oil company, using hybrid ARIMA-ARCH-GARCH models. Employing quantitative time series analysis, the population comprises all daily AALI stock prices from January 1, 2021, to June 30, 2025 (1,145 observations), sampled purposively via Investing.com data. Analysis techniques include ADF stationarity tests, ACF-PACF correlograms, AIC/SC/HQ model selection, ARCH-LM heteroskedasticity tests, and forecasting accuracy evaluation. Results identify ARIMA(1,1,1) as optimal for mean modeling and GARCH(2,1) for volatility, achieving 53% average forecasting accuracy for July 31-August 5, 2025. The hybrid model effectively captures price patterns despite external influences.
The Influence of Business Resilience, Entrepreneurial Characteristics and Business Experience on Business Sustainability with Education Level as a Moderating Variable in Business Groups in Palangka Raya City Hasudungan Biondhy Antang, Rexy; Irawan, Irawan; Sintani, Lelo
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.424

Abstract

This study aims to analyze the influence of business resilience, entrepreneurial characteristics, and business experience on business sustainability, as well as to test the role of education level as a moderating variable. The sampling technique in this study uses an explanatory quantitative approach and a descriptive qualitative technique.Purposive Samplingconducted through Observation and Questionnaires. The sample size taken was 70 samples consisting of respondents who are business actors in the culinary, furniture, and batik sectors in Palangka Raya City. The data analysis technique used Partial Least Squares–Structural Equation Modeling (PLS-SEM) with the SmartPLS 3.2.9 software analysis tool. The results of this study indicate that business resilience, entrepreneurial characteristics, and business experience partially have a positive and significant influence on business sustainability. Business experience was found to be the most dominant factor in determining business existence.
The Effect of Rice Field Management with Rotation The Impact of Rice and Secondary Crops on Farmers' Income in Nagori Pematang Gajing Reni P, Linda; Siadari, Martua; A Marbun, Jhonson; Ivanka, Adetya
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.425

Abstract

This study aims to (1) determine the intensity index of rice and carp farming (IIP). (2) determine the income of rice and carp farmers in Nagori Pematang Gajing, Gunung Malela District. (3) determine the effect of cropping pattern index, fish production costs, paddy production costs, and farmer experience on farm income.This research was conducted in Pematang Gajing Village, Gunung Malela District, Simalungun Regency, North Sumatra Province. The research method used in this study was quantitative descriptive. The sampling method used was purposive sampling of 30 people. Data collection techniques used were observation, interviews, documentation, and questionnaires. Data analysis techniques used were planting intensity index analysis, income analysis, and multiple linear regression analysis. The results of the study show that (1). Rice farming and carp farming are carried out by farmers with an average age of 50 years. The average level of education is at the junior high school level. The average farmer's experience is 21 years. The average number of farmer family members is 4 people. The results of this study indicate that the largest rice production and carp farming are from rice production with an average R/C value of 3. While from carp farming with an average R/C value of 1.From the results of the determination test analysis (R2) it can be seen that variables X1, X2, X3, X4 can explain 60.4%, it is concluded that the difference of 39.6 is influenced by factors not included in the study. From the results of the simultaneous test analysis (F test) X1, X2, X3, X4 have a significant effect on (Y). with a sig value of 0.00 <0.05. From the results of the partial test analysis (t test) X1, X3, X4 have a significant effect on (Y), while X2 is not significant on the increase in (Y).
Characteristics of Growol Dried Noodles With Addition of Nuts Sprout Flour Substitution Ainul Fitri, Ichlasia; Kanetro, Bayu; Eka Baskhara, Wisnu; Wicaksono, Basuki; Pratiwi Nurhidayati, Ayu
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.426

Abstract

Growol wet noodles are a food product made from cassava which is processed into growol flour as the main ingredient, as well as additional ingredients in the form of green bean sprout flour and cowpea. Growol flour is made with the principle of cassava which is fermented spontaneously for 3 days then dried. While sprout flour is made by germinating beans for 48 hours then dried. The purpose of this study was to determine the effect of adding mung bean and tolo bean sprouts on the physical, chemical characteristics and level of preference of growol wet noodles that meet the requirements and are liked by panelists. The experimental design of this study used a Completely Randomized Design (CRD) with two factors, namely the type of sprouts (mung bean sprouts and tolo bean sprouts) and the concentration of added sprouts (0%, 20%, and 30%). Physical analysis includes color, cooking loss, and water absorption. Chemical analysis includes water content, ash content, protein, fat, carbohydrates, antioxidants and flavonoids. Organoleptic properties were tested based on the level of preference. The data obtained were then subjected to statistical analysis with a 95% confidence level using the One Way Anova method. The results of the research show that the best growol wet noodles based on physical, chemical and organoleptic characteristics are wet noodles with the addition of 30% cowpea sprout flour which has physical characteristics such as lightness intensity 42,42, reddness -1.43, yellowness 13,97, cooking loss 1.21% and water absorption capacity 92.29. Chemical characteristics such as water content 57,75%(wk), ash content 1.11%(wk), protein content 7.85%(wk), fat content 0.88% (wk), carbohydrates 32,41%, antioxidant activity 16.43%RSA, fenolik 0,45 mg GAE/g, and flavonoids 4.73 mgQE/g.
Learning With The Jigsaw Type Cooperative Method To Improve Student Banking Law and Guarantee Learning Achievement Asyiah Siregar, Nurintan; Gulo, Nurainun
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.427

Abstract

The cooperative learning model is one of the current learning models that is recommended for use in increasing student enthusiasm for learning. The reason for choosing cooperative learning is to improve learning achievement and to improve social relations skills, foster tolerance towards other people’s opinions and be able to think creatively in solving problems and integrating knowledge with skill. This research is classroom action research with the aim to find out whether the Jigsaw cooperative learning model can improve learning achievement for students both individually and in groups. In addition, it also describes the learning activities of students and lecturers during the learning process and student responses to the jigsaw cooperative method. The instruments are tests, observation sheets and questionnaires. The results in cycle 1 showed that only 37,5% of the 40 students scored above 70 on student achievement. In cycle 2 there was an increase in learning achievement, namely 90% of students who scored above 70. Based on these data, the Jigsaw cooperative learning model can improve student achievement.
The Effect of Entrepreneurial Motivation And Self-Efficacy On The Performance of Umkm Types of Culinary Micro-Businesses Through Entrepreneurial Education In Serang City Mulyati, Susi; Mukhlis, Ahmad; Khaeruman
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.428

Abstract

This study aims to analyze the influence of entrepreneurial motivation and self-efficacy on the performance of culinary micro-enterprises in Serang City, both directly and indirectly through entrepreneurial education as an intervening variable. The research method used is a quantitative approach with a survey technique using a Likert scale questionnaire. The research sample was determined through a purposive sampling method of culinary micro-SMEs. Data analysis was conducted using the Partial Least Square-Structural Equation Modeling (PLS-SEM) method. The results of the study indicate that entrepreneurial motivation and self-efficacy have a positive and significant effect on MSME performance. Furthermore, entrepreneurial motivation and self-efficacy also have a positive and significant effect on entrepreneurial education. Entrepreneurial education has been shown to have a positive and significant effect on MSME performance and acts as an intervening variable in the relationship between entrepreneurial motivation and self-efficacy on MSME performance. These findings indicate that increasing motivation, self-confidence, and the quality of entrepreneurial education simultaneously can strengthen the performance of micro-enterprises in the culinary sector. This study provides theoretical contributions in the development of entrepreneurial behavior models and practical implications for local governments and stakeholders in designing more effective, targeted, and sustainable MSME empowerment programs to increase local economic competitiveness.
Post-Pandemic Valuation Anomaly: Why Current Ratio Failure To Mediate Roa And Der On Pbv In The Chemical Sector On The Idx Sukirno, Sukirno; Wahyuni, Rindi
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.429

Abstract

This study reveals the failure of the Current Ratio (CR) to mediate the effect of Return on Assets (ROA) and Debt to Equity Ratio (DER) on Price to Book Value (PBV) in 12 chemical companies on the Indonesian Stock Exchange (IDX) for the period 2020-2023 (n=48, post-outlier n=31). Using path analysis, the Sobel test, and a robustness check (SPSS 27) after log transformation, the model meets the classical assumptions (KS p=0.200, VIF<3, DW=2.33). Main findings: ROA (β=8.438, p<0.01) and DER (β=1.043, p<0.01) have a significant positive effect directly on PBV (R² adj=64.0%); DER has a significant negative effect on CR (β=-4.917, p<0.01). However, CR is insignificant on PBV (β=0.005, p=0.878), resulting in insignificant mediation (indirect ROA=0.007, DER=-0.017; Sobel z<1.96). Fixed effects confirm robustness. The results supportsignalling theory(ROA efficiency signal) andtrade-off theory(optimal DER), but reject contingency mediation in the high liquidity chemical sector post-COVID.Managerial implications: Prioritize ROA optimization (>5%) over excess liquidity; investors weigh profitability higher than balance sheet liquidity in chemical valuations.
The Relationship Between Work Posture and The Incidence of Low Back Pain Among Laundry Workers in The Area of Campus 1, Muhammadiyah University of Surakarta Adelina Miyagi, Indira; Darnoto, Sri
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.430

Abstract

This study investigated the association between work posture and low back pain (LBP) among Campus 1, Muhammadiyah University of Surakarta laundry workers. A cross-sectional analytical observational design was used to study 50 workers from 36 washing facilities selected by total sampling. The Rapid Entire Body Assessment (REBA) monitored work posture, while a validated Pain and Distress Scale questionnaire measured LBP symptoms. Data was collected from December 2024 to January 2025 and analyzed using univariate and bivariate chi-square tests. REBA found that most workers had low to moderate risk postures, while some had high-risk postures that could cause musculoskeletal diseases. Most LBP complaints were modest, but moderate and severe were notable. A substantial correlation (p < 0.05) exists between work posture and LBP, with higher posture risk leading to more complaints. These findings highlight the importance of ergonomics and preventive interventions in reducing occupational LBP among laundry workers.
Communication and Coordination in Zakat Management (Analysis of Synergy Between BAZNAS, LAZ and the Pati Regency Government) Mu'arif, Samsul; Ambarwati, Ambarwati
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.385

Abstract

The contestation of authority between zakat management institutions, represented by the government through the National Zakat Agency (BAZNAS) and the community through the Zakat Management Institutions (LAZ), is an unavoidable dynamic in zakat governance in Indonesia. Therefore, concrete steps are needed to build harmony and collaboration to optimize zakat collection in accordance with existing potential. This study uses a descriptive qualitative approach with research objects including BAZNAS, LAZ, and the Pati Regency Government. Data were collected through interviews, observations, and documentation, then analyzed using a descriptive analysis model. The results of the study indicate that a constructive synergy has been formed between zakat management institutions in Pati Regency through two main pillars, namely communication synergy and coordination synergy. This synergy has produced several important achievements: (1) strengthening zakat regulations, including through the issuance of a Regent Regulation on zakat and the initiation of the preparation of a Regional Regulation on zakat; (2) institutional development, such as the establishment of new Zakat Collection Units (UPZ), data collaboration between zakat managers and religious instructors, and the implementation of quarterly coordination between institutions; and (3) synergy of zakat programs, including zakat education and socialization, UPZ development, and zakat distribution not only for the eight ashnaf but also for humanitarian programs such as disaster management. These findings confirm that participatory communication and structured coordination are the keys to the success of zakat institutional synergy at the regional level.
Carbon Intensity Indicator (CII) Calculation Analysis For Operational Feasibility of Passenger Ships Awaludin Jamil, Handi; Cahyono , Benny; Laksmi Marahaini, Nadilah
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.397

Abstract

The Maritime industry faces increasing pressure to reduce greenhouse gas emissions under the International Maritime Organization’s Carbon Intensity Indicator (CII) framework. This study evaluates operational performance, fuel consumption, and carbon intensity for two aging passenger ships operated by PT. XYZ (Passenger Ship A, 34 years; Passenger Ship B, 33 years) and assesses whether repowering can improve efficiency and compliance. Financial feasibility is projected using trendline regression under two scenarios: without subsidies and with subsidies. Results indicate that without subsidies, both ships are projected to incur losses from the initial period, with deficits increasing annually. Under subsidies, Passenger Ship A’s gross profit is projected to become negative starting in 2028, while Passenger Ship B is expected to remain financially positive. Environmentally, CII results show rising carbon emission intensity, averaging annual increases of 0.56% for Passenger Ship A and 2.09% for Passenger Ship B, leading to declining CII ratings over time. Passenger Ship A is projected to reach Rating E during 2029–2035, requiring a critical operational decision by 2031, while Passenger Ship B is projected to reach Rating E during 2031–2035, requiring a decision by 2033. Repowering reduces annual fuel consumption by 41.4% and 47.5%, respectively, and improves both ships’ CII ratings to Rating A, supporting continued operation with international environmental compliance.

Page 35 of 39 | Total Record : 382

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