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 508 Documents
 41   42   43   44   45 
Kinetic Stability and Operational Optimization of Turbidimetric Sulfate Analysis Based on SNI 6989.20:2019 Methodology Uswatul Husna
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.v6i2.485

Abstract

The measurement of sulfate (SO₄²⁻) levels using the SNI 6989.20:2019 turbidimetric method is highly dependent on the stability of the barium sulfate (BaSO₄) suspension. This study aims to evaluate the effect of waiting time (standing time) variations ranging from 5 to 35 minutes and sample container handling protocols (single vs. multi-Erlenmeyer) on the accuracy of analytical results at concentration levels of 20 mg/L and 60 mg/L. Measurements were conducted using a UV–Vis spectrophotometer at a wavelength of 420 nm. The results indicated that, at low concentrations (20 mg/L), the suspension remained relatively stable, with recovery values within the acceptable limits (90–110%) up to 35 minutes. Conversely, at high concentrations (60 mg/L), a significant decrease in recovery was observed after the 10-minute threshold, reaching 77.83% at 35 minutes due to particle sedimentation. The multi-Erlenmeyer protocol provided more accurate kinetic data compared to the single-Erlenmeyer approach, which tended to produce positively biased results due to mechanical re-suspension effects during repeated sampling.It is concluded that strict adherence to a 5-minute waiting time window is essential to ensure the validity of water quality monitoring, particularly for samples with high pollutant loads. Keywords: Sulfate, Turbidimetry, SNI 6989.20:2019, Waiting Time, Kinetic Stability
Analysis of Fuel Consumption Variation of the 8dkm-28e Main Engine at Stable Performance of 620 RPM in the MV. Tanto Keluarga Nourman Viqry Dwinanda; Agus Prawoto; Shofa Dai Robbi; Monika Retno Gunarti; Novitasari
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.v6i2.490

Abstract

This study examines the variation of Heavy Fuel Oil (HFO) fuel consumption of the DAIHATSU 8DKM28e Main Engine at a stable performance condition of 620 RPM on the container ship MV. Tanto Keluarga, amidst the pressure of increasing fuel costs and regulations on maritime efficiency and decarbonization. The study uses a descriptive quantitative approach with a population of all main engine operational data during a certain voyage period and a sample of 5 sheets of Noon Report At Sea at a stable voyage condition in the open sea. The main instrument is the daily noon report that records the main engine speed, turbocharger speed, fuel rack, HFO consumption, and weather and sea conditions, plus ship technical documents and academic literature as secondary instruments. The data analysis technique used is descriptive quantitative analysis, with the calculation of averages, ranges, and trends as well as simple correlation examinations between performance parameters. The results show that HFO consumption varies up to approximately 1,005 liters per day at a relatively stable RPM, with a pattern closely related to changes in fuel rack, turbocharger speed, and sea state and weather conditions. The findings support that the main engine performance condition at 620 RPM is in dynamic equilibrium, so that fuel efficiency assessment needs to integrate internal and external factors simultaneously to support operational management, OPEX reduction, and compatibility with IMO EEXI and CII regulations.
The Impact of Implementing Cadet English Language Skills on Preventing Miscommunication Virginia Pustya Nautika; Firdaus Sitepu; Intan Sianturi; I'ie Suwondo
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.v6i2.491

Abstract

Amid rapid maritime industry growth in Indonesia, effective English communication is vital for cadet safety on ships, regulated by IMO's Standard Marine Communication Phrases (SMCP) to prevent miscommunication. This study aims to analyze the influence of cadet English skills implementation (X) on miscommunication prevention (Y) aboard KM Sabuk Nusantara 101. Employing a quantitative approach with simple linear regression design, the research targeted a population of 23 crew members, using total sampling (n=21). Instruments included Likert-scale questionnaires, observation, and documentation, analyzed via SPSS for validity, reliability, classical assumptions, and regression (Y=23.728+0.509X). Results reveal a significant positive effect (t=13.500, p=0.000, R=0.952, R²=90.6%), with high mean scores for English skills (40.57) and prevention (44.38). In conclusion, enhanced cadet English proficiency substantially reduces miscommunication risks, recommending targeted Maritime English training.
Maintaining Maritime Safety Through the Use of Navigational Equipment in Accordance with Solas Chapter V Anggie Veronica Zuyyana Octavia; Arleiny; Maulidiah Rahmawati; Fazri Hermanto
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.v6i2.499

Abstract

Maritime navigation safety remains critical amid rising global and Indonesian shipping incidents, particularly collisions in congested routes, where human error and inconsistent GPS performance in tropical waters contribute significantly to risks despite SOLAS Chapter V mandates for standardized equipment. This study aimed to analyze the implementation and effectiveness of Radar and GPS usage in ensuring safe navigation on the LPG/C Gas Arar vessel during busy Teluk Semangka–Panjang voyages. A qualitative descriptive case study was conducted with purposive sampling of four key deck officers, employing structured observations, semi-structured interviews, and document analysis during sea practice from July 2024 to 2025; data were triangulated and thematically coded using NVivo 14 following Miles et al. (2014). Findings revealed operational Radar and GPS equipment with high SOLAS compliance via SOPs, comprehensive passage plans (Appraisal, Planning, Execution, Monitoring), and effective Bridge Team Meetings, although Radar dominance due to GPS waypoint limitations posed technical risks, mitigated by crew experience and cross-verification. In conclusion, integrated navigation enhances safety but requires GPS optimization; implications include training recommendations to reduce errors by 25–40% in Indonesian LPG fleets
Application of the Apriori Algorithm in Identifying Association Patterns in Car Parts Sales Based on Transaction Data Wiyarno; Indra Permana; Erna Apriani; Hasna Nur Alifah
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.v6i2.506

Abstract

This study is motivated by the increasing use of transaction data as a strategic information source in business decision-making, particularly in the sale of vehicle parts. However, large and complex transaction datasets are often not fully utilized to identify consumer purchasing patterns. Therefore, this study aims to identify association patterns between products using the Apriori algorithm, thereby providing recommendations to support marketing strategies, inventory management, and sales growth. The research method employed is a quantitative approach based on data mining using the Association Rule Mining (ARM) technique. The research stages include transaction data collection, preprocessing (cleaning, transformation, and conversion to transaction format), itemset formation, and the application of the Apriori algorithm using a minimum support parameter of 0.5% and a confidence level of 60%. The analyzed data consists of 10,922 transactions divided into training and testing datasets. The results of the study indicate that the Apriori algorithm is capable of generating association rules with high confidence values of up to 83%, indicating strong relationships between items. Specific items such as 9-09060-EXCHEM emerge as the central item in various rules, demonstrating a dominant role in purchasing patterns. These findings prove that the Apriori approach is effective in uncovering purchasing patterns and can be used as a basis for data-driven decision-making.
Analysis of the Implementation of Abandon ship drill to Face Emergency Situations on the MV Pacific Bulk Ship Mochammad Anggit Satria Yudha; AA Istri Sri Wahyuni; Otri Wani Sihaloho; Arleiny
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.v6i2.513

Abstract

Abandon ship drill is a mandatory safety exercise conducted on board a ship to improve crew readiness in facing emergencies according to SOLAS 1974 Chapter III Regulation 19. A common problem is that the exercise implementation has not been optimal, especially related to the understanding of tasks based on the muster list, the readiness of safety equipment, and crew coordination. This study aims to analyze the implementation of abandon ship drill and assess the level of readiness and understanding of crew on MV. Pacific Bulk in facing emergencies. The study used a qualitative method with the Miles and Huberman analysis model which includes data reduction, data presentation, and drawing conclusions. Data were obtained through observations during sea practice, interviews with officers and crew, and documentation of drill activities. The results of the study indicate that the abandon ship drill has been carried out routinely every month and follows basic safety procedures such as sounding the emergency alarm, gathering the crew at the muster station, and briefings from the captain. However, the implementation has not been fully optimal because the lifeboat during the exercise was only lowered to the embarkation deck and there were still delays in crew, uneven understanding of tasks, and less than optimal post-drill evaluation. Therefore, it is necessary to increase crew familiarization, implement more disciplined and sustainable training, and conduct a comprehensive evaluation after the drill as a preventive measure to improve crew readiness.
Analysis of Lighting Intensity and Visual Comfort of Workers at PT PLN (Persero) UID Jawa Timur Rafi Bayuaji; Endang Dwiyanti
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.v6i2.514

Abstract

Lighting is an important factor in supporting visual comfort, eye health, and work productivity. This study aims to analyze the level of lighting intensity in workspaces at the Heritage Building of PT PLN (Persero) UID East Java and evaluate its compliance with applicable standards. This research used a quantitative descriptive method with direct measurements using a lux meter at five work areas, namely Distribution, Commerce, Planning, Finance, as well as Communication and General Affairs. The results showed that most workspaces had lighting intensity below the minimum standard of 300 lux based on Minister of Manpower Regulation No. 5 of 2018. Only the Finance Division met the standard with an average of 339 lux. Inadequate lighting conditions may cause visual fatigue, decreased concentration, and reduced work productivity. Therefore, improvements in the lighting system are needed through additional lamps, optimization of natural lighting, and regular lamp maintenance.
Efforts to Prevent Gratification in the Ship Crew Recruitment System by the Manning Department at PT Arjuna Samudera Indonesia Ardelia Ayu Safitri; Trisnowati Rahayu; Teguh Pribadi; Intan Sianturi
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.v6i2.515

Abstract

The Indonesian shipping industry relies on the recruitment of qualified crew to maintain safety and efficiency, but is vulnerable to bribery that undermines meritocracy. This study aims to evaluate the recruitment system at PT Arjuna Samudera Indonesia, identify potential bribery cases, and analyze the effectiveness of its prevention. Using a descriptive qualitative approach, the population included Crewing Department stakeholders (15 staff, 50 prospective crew), with a purposive sample of 10 key informants. Instruments included semi-structured interviews, observation, and documentation; iterative data analysis via Miles, Huberman, and Saldana (reduction, presentation, verification). The results show a structured process (planning, administration, interviews, checks and balances) without written SOPs, the potential for bribery (money, gifts, nepotism), and the effectiveness of prevention through transparency and multi-layered oversight. The conclusion recommends digital SOPs and ethics training for long-term integrity
Implementation of Collision Regulations (Colreg) to Avoid the Danger of Collisions in Narrow Shipping Channels on the KM. Pangrango I Putu Arya Weda Witana; Anak Agung Istri Sri Wahyuni; Faris Nofandi; Tri Haryanto
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.v6i2.516

Abstract

Narrow channels in Indonesian waters pose significant collision risks for passenger ships like KM. Pangrango due to dense local traffic and limited maneuverability. This study aims to analyze COLREG Rules 5-9 implementation and identify implementation constraints during watchkeeping. Qualitative descriptive approach employed purposive sampling of two navigation officers (Second and Third Officer) as key informants. Data collected via direct observation, semi-structured interviews, and document analysis, validated through triangulation. Findings reveal generally compliant COLREG application through visual-radar monitoring, safe speed adjustments, risk assessments, evasive maneuvers, and right-side channel positioning. However, suboptimal consistency in comprehensive surveillance, bridge coordination, and early decisive actions persists due to fluctuating alertness amid unpredictable fishing vessels and buoys. Practically, enhanced bridge resource management training is recommended. Future research should examine multi-vessel comparisons.
Analysis of the Garbage Management Plan Implementation on KMP. Shita Giri Nusa to Prevent Pollution in the Lombok Strait I Wayan Arya Kalingga Putra; Anak Agung Istri Sri Wahyuni; Indah Ayu Johanda Putri; Anak Agung Ngurah Ade Dwi Putra Yuda
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.v6i2.517

Abstract

Marine pollution from ship waste, regulated by MARPOL Annex V, threatens ecosystems like the Lombok Strait, where unmanaged garbage from vessels like ferries contributes significantly. This study aims to identify inhibiting factors in implementing the Garbage Management Plan (GMP) on KMP Shita Giri Nusa and evaluate the ship's operational company's supervisory role. Employing a qualitative descriptive approach, data were collected via observation, semi-structured interviews, and documentation during sea practice from July 2024 to July 2025. The population comprised all crew and company staff involved in GMP; purposive sample of 3 key informants such as Bosun, Crew, and Office Personnel. Instruments included observation guidelines, interview protocols, and document checklists; analysis applying Fishbone diagram with source triangulation. Results reveal adequate basic facilities and crew understanding but inconsistencies in waste sorting during peak workloads, limited labeled bins, occasional equipment damage, and suboptimal company training/monitoring. In conclusion, GMP implementation is moderately effective yet requires enhanced consistency, intensive socialization, and facility upgrades to prevent pollution effectively.

Page 43 of 51 | Total Record : 508

 41   42   43   44   45 

Filter by Year

2021 2026


Reset
Filter By Issues
All Issue 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