cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Arman Harahap
Contact Email
armanhrahap82@gmail.com
Phone
+6285370005518
Journal Mail Official
ijersc@gmail.com
Editorial Address
Jl. SM. Raja, Kota Rantauprapat, Sumatera Utara, Indonesia
Location
Unknown,
Unknown
INDONESIA
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 670 Documents
 62   63   64   65   66 
Servant Leadership, Organizational Culture, And Employee Performance: Examining The Mediating Role of Job Satisfaction at The Regional Revenue Agency of Riau Province Windi Desvianti; Abd. Rasyid Syamsuri; Rosnelly Roesdi
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.781

Abstract

This study examines the effects of servant leadership and organizational culture on employee performance, with job satisfaction acting as a mediating variable, among employees of the Regional Revenue Agency of Riau Province, Indonesia. A quantitative research approach was employed using survey data collected from 58 employees selected from a population of 118 employees through the Slovin formula. Data were analyzed using the Statistical Package for the Social Sciences (SPSS) and Structural Equation Modeling–Partial Least Squares (SEM-PLS) with SmartPLS software. The findings reveal that servant leadership and organizational culture have positive and significant effects on both job satisfaction and employee performance. Furthermore, job satisfaction has a positive and significant effect on employee performance and significantly mediates the relationships between servant leadership and employee performance as well as between organizational culture and employee performance. These findings highlight the importance of strengthening servant leadership practices and fostering a supportive organizational culture to enhance employee satisfaction and ultimately improve employee performance in public sector organizations.
Effectiveness of Corn Cob Activated Carbon In Removing Total Suspended Solids And Total Chromium In Batik Waste Canda Diwratna Wulandari; Anis Artiyani; Maria Roslyn Dwiputri; Hery Setyobudisudarso
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.783

Abstract

The batik production process involves several stages that generate liquid, gaseous, and solid waste. Furthermore, the process requires significant amounts of water. Without proper treatment, this can degrade water quality. Certain waste parameters, specifically Total Suspended Solids (TSS) and Total Chromium, exceed established quality standards. Given the limitations batik artisans face regarding infrastructure, resources, and access to technology, there is a need for a waste treatment model that is simple, modular, and easy to maintain. Adsorption is a widely used method for wastewater treatment, with corn cobs serving as an adsorbent. The purpose of this study is to test the ability of activated carbon from corn cobs to reduce TSS and total chromium in batik wastewater. The adsorbent dosage was 1.5 grams and 3 grams, with stirring times of 30, 60, and 90 minutes, at a stirring speed of 200 rpm. The results indicate that activated carbon derived from corn cobs effectively adsorbed TSS and Total Chromium from batik wastewater. The highest effectiveness of the percentage of TSS and Chromium content allowance at the variation of activated carbon dose of 3 grams and at the contact time of 90 minutes with the percentage of TSS elimination of 80% and Total Chromium of 97%, but it has not met the quality standards in accordance with the Ministry of Environment and Foresty Regulation No. 16 of 2019, namely TSS of 50 mg/L and total Chromium of 1 mg/L.
Design of a Desktop Application System for Sales Data and Inventory Management at CV Eat Cipeng Jatijajar Syamsul Bakhri; Yogi Ridho Syahputro
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.785

Abstract

CV Eat Cipeng Jatijajar is a culinary business that currently relies on manual methods for recording and managing inventory and sales data. This situation leads to various issues, such as time inefficiency, a high risk of recording errors, and difficulties in generating reports. This study aims to design and develop a desktop application—built using Java and MySQL—to facilitate the computerized management of inventory and sales data. The software development process follows the waterfall model, spanning from requirements analysis to black-box testing. Implementation results demonstrate that the developed application enhances operational efficiency, minimizes recording errors, and accelerates data retrieval and reporting processes. The application also features user login capabilities, master data management, tracking of incoming and outgoing goods, order processing, and comprehensive inventory reporting. Consequently, the system is expected to support the company's operations more effectively and professionally.
Comparative Study of Volatile Compounds in Mayas Rice Under Organic Fertilizer Treatment Using GC-MS Analysis Nur Hidayat; Rusmini; Silvia Darmans; La Mudi; Frans Alexander A Fukom; Ihsan Tri Rengganis
International Journal of Science and Environment (IJSE) Vol. 6 No. 2 (2026): May 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.v6i2.671

Abstract

Rice aroma is an important quality attribute determined by volatile compounds, which are influenced by cultivation practices, including fertilization. However, information regarding the effects of organic fertilization on the volatile profile of local aromatic Mayas rice remains limited. This study aims to identify volatile compounds produced from Mayas rice treated with organic fertilizer. This study was conducted in Kutai Lama Village, East Kalimantan, Indonesia, from March 2022 to March 2023. Mayas rice was cultivated under two fertilization systems: inorganic fertilizers (200 kg ha⁻¹ urea, 100 kg ha⁻¹ SP-36, and 100 kg ha⁻¹ KCl) and shrimp shell-based organic fertilizer (20 kg ha⁻¹). Rice grains were harvested at maturity, dried, milled, and analyzed for volatile compounds. Aroma profiling was performed at the Indonesian Center for Biodiversity and Biotechnology (ICBB) using GC–MS. Volatile compounds were extracted with n-hexane, identified using the NIST library, and compared based on their relative peak areas. The results of GC-MS analysis of aromatic compounds in Mayas rice in organic fertilizer treatment obtained 81 compounds, while in inorganic fertilizer treatment, only 59 aromatic compounds were obtained. GC-MS analysis revealed that the aromatic compound profiles in the organically fertilized Mayas Rice were more complex than those in the inorganic fertilized Mayas Rice. The differences were seen based on the diversity of aldehyde compounds, terpenoids, esters, aromatic alcohols, and heterocyclic compounds identified.
Growth Performance of Boer Goat Crossbreeds Based On The Number of Kids Born Through Weaning At CV. Raman Farm Sejahtera Efda Aliyansyah; Suraya Kaffi Syahpura; Susanti
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.782

Abstract

The growth performance of goats from birth to weaning is an indicator of meat goat productivity and can be related to the number of kids in a litter. This study aims to compare the growth performance of Boer goat breeds based on the number of kids born to weaning at CV. Raman Farm Sejahtera. The study used a descriptive quantitative method with a comparative observational approach. The study population was Boer goat breeds that were born and met the research criteria, while the sample size was 15 goats consisting of 5 singletons, 5 twins, and 5 triplets, selected using purposive sampling. The research instruments were calibrated scales, recording devices, and cameras, while data were obtained from reproductive recordings and body weight measurements of BB0, BB1, BB2, and BB3. Data analysis was performed using the mean and standard deviation. The results showed that the highest average body weight was found in singletons, followed by twins and triplets throughout the observation period. In conclusion, there is a tendency for higher growth performance in singletons compared to twins and triplets until weaning age.
Design and Implementation of an IoT-Based Real-Time Monitoring and Closed-Loop Control System for KUB Day-Old Chick Brooding Houses Dzaky Ahnafianto; Muchamad Malik; Aan Burhanuddin
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.786

Abstract

The brooding phase represents the most critical physiological window in the life cycle of Kampung Unggul Balitbangtan (KUB) native chickens. Day-Old Chicks (DOC) possess underdeveloped thermoregulatory mechanisms, requiring strict microclimatic boundary control within 32.0–35.0 °C and 60–70% relative humidity (RH) to prevent hypothermia, respiratory distress, and high mortality. Traditional brooding management relies predominantly on manual observation and unmodulated incandescent heating, resulting in severe thermal fluctuations, excessive fuel/electricity consumption, and uneven chick growth. This study presents the design, fabrication, and rigorous empirical validation of an Internet of Things (IoT)-driven precision brooding environment system equipped with automated closed-loop multi-actuator control. The architecture integrates a high-precision digital DHT20 I2C temperature and relative humidity sensor, an analog DC voltage sensor for 12V DC power supply rail integrity monitoring, an ESP32 dual-core microcontroller running a deterministic hysteresis-PID control algorithm, and dynamic cloud telemetry via the Blynk IoT protocol. Static calibration against secondary standards (Fluke 971 and Keysight 34461A) demonstrated exceptional sensor reliability, yielding an absolute temperature error of 0.18 ± 0.07 °C (R² = 0.998) and voltage linearity across 9.0–15.0 V with a maximum deviation of 0.04 V (R² = 0.999). Dynamic 24-hour testing under fluctuating tropical ambient conditions (22.8–33.4 °C; 58.2–94.1% RH) confirmed that the closed-loop system robustly maintained internal brooder temperature at 33.52 ± 0.38 °C and relative humidity at 65.4 ± 2.8%, eliminating nocturnal thermal stress. Biological validation across a 14-day brooding trial with n = 200 KUB DOC chicks showed a significant reduction in cumulative mortality from 8.0% (conventional brooder) to 1.0% (IoT brooder), alongside a 34.1% improvement in mean Body Weight Gain (331.5 ± 12.4 g vs. 247.2 ± 15.8 g) and an optimized Feed Conversion Ratio (FCR) of 1.24 vs. 1.62. The proposed cyber-physical system offers an energy-efficient, robust, and scalable automation paradigm for smart poultry farming under tropical climatic volatility.
Sustainability Efforts for Green Packaging as an Eco-Friendly Alternative Based on a Life Cycle Assessment Approach in the Food Product Supply Chain Eka Lailita Eti Varina; Siti Hanan; Romdhoni
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.787

Abstract

The increasing use of plastic packaging in food supply chains poses environmental concerns due to resource consumption and the potential generation of plastic waste. This study aims to evaluate the environmental impacts of plastic packaging using Life Cycle Assessment (LCA), identify critical impact hotspots, and develop a green packaging alternative based on starch bioplastic. The LCA was conducted using a cradle-to-gate system boundary with SimaPro and the Eco-costs 2024 V1 method across three packaging scenarios: polyethylene (PE), multilayer packaging, and polylactide (PLA). The bioplastic was developed using three formulations: F1 (glycerol), F2 (glycerol and CMC), and F3 (glycerol, CMC, and ginger extract), and was evaluated based on thickness, tensile strength, and elongation at break. The LCA results showed single score values of €14.6 for PE, €28.2 for PLA, and €65.9 for multilayer packaging, with carbon footprint identified as one of the major contributors to the environmental impact of the multilayer scenario. The bioplastic testing results showed thicknesses of 0.40, 0.50, and 0.40 mm for F1, F2, and F3, respectively, with tensile strength values of 4.28, 5.16, and 4.73 MPa and elongation at break values of 48.35%, 68.42%, and 57.26%, respectively. Among the three formulations, F2 demonstrated the best mechanical performance. The integration of LCA and mechanical testing indicates that the development of green packaging should consider a balance between material performance and environmental impacts. This approach supports Sustainable Development Goals (SDGs) 9 and 12 and provides a basis for developing more sustainable packaging systems toward a circular economy
Analysis of the Effect of Fuzzy Logic-Based Environmental Control on Temperature and Humidity Stability in KUB Day-Old Chick Brooders Muhamad Nur Habib; Muchamad Malik; Wardatul Jannah
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.788

Abstract

The microclimatic environment during the brooding phase (Days 1–14 post-hatch) is the single most decisive factor governing the survival, growth kinetics, and physiological health of Kampung Unggul Balitbangtan (KUB) Day-Old Chicks (DOC). Due to immature thermoregulatory centers and the absence of thermal insulation, DOCs are poikilothermic and highly susceptible to ambient temperature drops and humidity swings. Conventional bang-bang (ON-OFF) and manual control systems suffer from severe thermal oscillations, actuator chatter, high energy waste, and inrush current surges. This research designs, implements, and rigorously analyzes an intelligent closed-loop microclimate regulation system driven by an embedded Mamdani Fuzzy Logic Controller (FLC) executed on an ESP32 dual-core 32-bit microcontroller. The sensory architecture integrates a high-precision Aosong DHT20 sensor over a deterministic hardware I2C bus for concurrent temperature and relative humidity (RH) acquisition, coupled with a 5:1 metal-film resistive voltage divider monitoring the primary 12V DC power supply rail. The FLC processes error e(T), error rate Δe(T), and RH to modulate ceramic infrared heaters via solid-state zero-crossing phase dimming and variable-speed 12V DC exhaust ventilation. Static metrological calibration against Fluke 971 and Keysight 34461A standards established a Mean Absolute Error (MAE) of 0.182 °C (R² = 0.9998) for temperature, 0.740% for RH (R² = 0.9993), and 0.021 V for power supply rail voltage (R² = 0.9999). Dynamic 24-hour testing under tropical ambient disturbances (22.5–33.8 °C; 56.4–94.6% RH) proved that the proposed FLC maintained brooder temperature with extreme precision at 33.51 ± 0.14 °C (Thermal Stability Index TSI = 99.8%) and RH at 65.2 ± 1.4%, effectively eliminating the ±0.75 °C overshoot/undershoot cycles typical of hysteresis controllers. Biological validation across a 14-day live trial with n = 300 KUB DOC chicks demonstrated that the Fuzzy IoT system suppressed cumulative mortality to 0.67% (vs. 8.00% conventional and 3.00% ON-OFF), increased final Day-14 mean body weight to 374.2 ± 11.6 g (+51.4% over conventional), achieved an extraordinary Feed Conversion Ratio (FCR) of 1.18 (vs. 1.62 conventional), and reduced electrical consumption by 48.6%. The study confirms that fuzzy logic environmental modulation provides superior microclimate stability, animal welfare, and energetic efficiency for smart precision poultry farming.
Risk Analysis And Mitigation Strategies For MRT (Mass Rapid Transit) And LRT (Light Rail Transit) Construction Projects In Jakarta Achmad Fajar Malik; Hermanto Dwiatmoko
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.789

Abstract

The construction projects of Mass Rapid Transit (MRT) and Light Rail Transit (LRT) in Jakarta are highly complex and therefore prone to various risks that may affect project performance. Consequently, it is necessary to identify dominant risk patterns, analyze the influence of risks on project performance, and formulate risk mitigation strategies. This study employed the Severity Index (SI) method to determine risk severity, a Risk Matrix to map risk levels, multiple linear regression analysis to examine the influence of risks on project performance in terms of time, quality, and cost, and Fault Tree Analysis (FTA) to identify the root causes of dominant risks. The results identified several dominant risks categorized as high risks in MRT and LRT construction projects in Jakarta. The regression analysis also showed that, partially, material risk had a significant effect on time (Sig. = 0.017), human resource risk had a significant effect on quality (Sig. = 0.018), and economic risk had a significant effect on cost (Sig. = 0.016). The FTA results indicated that the risks with the highest probabilities of occurrence were lack of workforce competency (10.2%), difficulties in project financing (9.6%), and delays in material delivery (5.0%). Risk mitigation strategies should prioritize improving workforce competency, strengthening material management, enhancing project financial control, and improving coordination in managing design changes to improve schedule performance, quality, and cost efficiency in MRT and LRT construction projects in Jakarta.
Analysis of Service Quality and Its Impact on Infertility Patient Satisfaction at RSIA Stella Maris Medan Afra Nabila Ansar; Sri Lestari Ramadhani Nasution; Siti Zubaidah; Anjelimery P. Sihotang; Haryadi
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 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.v6i3.791

Abstract

Infertility is a reproductive health issue that has physical, psychological, social and economic implications for couples of childbearing age. Findings indicate complaints regarding waiting times. This study examined the level of satisfaction among infertility patients (SERVQUAL), which remains limited.This was a quantitative study using a cross-sectional design with an analytical approach with a sample of 94 respondents. Data were collected and analysed using univariate, bivariate (Chi-square test) and multivariate analyses (multiple logistic regression). The results of the study indicate that there is no significant association between these characteristics and patient satisfaction. Based on the bivariate analysis, the dimensions of Tangible, Responsiveness, Assurance and Empathy were significantly associated with patient satisfaction, whilst Reliability showed no significant association. Multivariate analysis showed that Assurance and Empathy jointly had a significant effect on patient satisfaction, with Empathy being the most dominant factor (OR = 7.117). It can therefore be concluded that the quality of care particularly the dimensions of Assurance and Empathy plays a crucial role in determining the level of satisfaction among infertility patients. It is hoped that the management of the Halim Fertility Centre at RSIA Stella Maris will enhance healthcare staff’s Empathy skills through training in communication and patient care.

Page 64 of 67 | Total Record : 670

 62   63   64   65   66 

Filter by Year

2021 2026


Reset
Filter By Issues
All Issue Vol. 6 No. 4 (2026): November 2026 Vol. 6 No. 3 (2026): August 2026 Vol. 6 No. 2 (2026): May 2026 Vol. 6 No. 1 (2026): February 2026 Vol. 5 No. 4 (2025): November 2025 Vol. 5 No. 3 (2025): August 2025 Vol. 5 No. 2 (2025): May 2025 Vol. 5 No. 1 (2025): February 2025 Vol. 4 No. 4 (2024): November 2024 Vol. 4 No. 3 (2024): August 2024 Vol. 4 No. 2 (2024): May 2024 Vol. 4 No. 1 (2024): February 2024 Vol. 3 No. 4 (2023): November 2023 Vol. 3 No. 3 (2023): August 2023 Vol. 3 No. 2 (2023): May 2023 Vol. 3 No. 1 (2023): February 2023 Vol. 2 No. 4 (2022): November 2022 Vol. 2 No. 3 (2022): August 2022 Vol. 2 No. 2 (2022): May 2022 Vol. 2 No. 1 (2022): February 2022 Vol. 1 No. 1 (2021): November 2021 More Issue