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INDONESIA
Jurnal Sains dan Teknologi
Published by CV ITTC Indonesia
ISSN : -     EISSN : 28077393     DOI : 10.47233
Core Subject : Science, Education, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering
Jurnal Sains Dan Teknologi (JSIT), merupakan Jurnal Penelitian dan Kajian Ilmiah yang diterbitkan CV.ITTC - INDONESIA dan dikelola langsung oleh Webinar.Gratis dan Even.Gratis yang terbit 3 (tiga) kali dalam setahun. Penyunting menerima kiriman naskah hasil kajian dan penelitian untuk bidang, Teknik Elektro, Teknik Sipil, Teknik Mesin, ,Teknologi Informasi.
Arjuna Subject : Umum - Umum
Articles 234 Documents
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Pengaruh Pemanfaatan Limbah Batu Onyx sebagai Subtitusi Agregat Kasar Terhadap Beton Porus Utomo, Rendy Cahyo; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4650

Abstract

Conventional concrete, which is impermeable in nature, can increase surface runoff and cause water ponding problems. Therefore, an alternative construction material that supports better drainage systems is required. One potential solution is porous concrete utilizing waste onyx stone as a partial replacement for coarse aggregate.This study aims to analyze the effect of using waste onyx stone as a substitute for coarse aggregate on the compressive strength and permeability of porous concrete.The research method used was a laboratory experimental method with variations of waste onyx stone substitution of 0%, 50%, 75%, and 100% of the total coarse aggregate. The tests conducted included material characteristic testing, compressive strength testing at 7 and 28 days, and permeability testing of porous concrete.The results showed that the use of waste onyx stone affected the compressive strength and permeability of porous concrete. At 7 days, the 0% variation produced the highest compressive strength of 5.91 MPa, while the 100% variation produced the lowest value of 4.25 MPa. At 28 days, the highest compressive strength was obtained in the 0% variation at 10.35 MPa, while the lowest was in the 100% variation at 4.62 MPa. The permeability test results showed an increase from 0.36 cm/s in the 0% variation to 0.60 cm/s in the 100% variation. The higher the substitution of waste onyx stone, the higher the permeability value, while the compressive strength tended to decrease.
Analisis Manajemen Risiko pada Pelaksanaan Proyek Peningkatan Jalan Rigid Pavement Ruas Wadungasri – Tambaksawah Hamzah, M. Luthfi; Triana, Masca Indra
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4654

Abstract

Road construction projects are an important part of infrastructure development and involve various risks during their implementation. Poor risk management may lead to project delays, cost overruns, decreased work quality, and disruption of project performance. Therefore, risk management analysis is required to identify and evaluate the risks that may occur during project execution. This study aims to analyze risk management in the implementation of the rigid pavement road improvement project on the Wadungasri – Tambaksawah section. The study employed a quantitative approach through questionnaire distribution to 30 respondents directly involved in the project implementation. Data analysis was conducted using the Severity Index (SI) method by combining probability and impact values to determine the risk level of each variable. The results indicate that 7 risk variables were classified into the high-risk category (43.75%), namely delays in equipment and material mobilization, low work productivity and efficiency, equipment damage in the field, delays in project progress, ineffective traffic management, ineffective work methods, and limited access to materials and equipment. Meanwhile, 9 other variables were categorized as medium risk, and no variables were classified as low risk. Based on the Severity Index ranking, several operational-related risk variables showed higher risk levels compared to other variables. Risk response strategies were mainly focused on mitigation efforts, including preventive equipment maintenance, improvement of material mobilization planning, periodic project progress monitoring, optimization of work methods, and traffic management around the construction area. Proper risk management is expected to improve project performance and support the achievement of project objectives effectively.
Penerapan Belbin Team Role dalam Mengatasi Ketidaksinkronan Tujuan Tim Pemasaran PT XYZ Nurmiati, Evy; Shufa, Aliya Nabila; A, Alif Salsabila; Nurzahra, Bevy Annisa; Fauzan, Rizki
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4655

Abstract

The fast-moving consumer goods (FMCG) sector in Indonesia is experiencing a shift in competitive dynamics, characterized by the impact of digital disruption and evolving consumer behaviors. This scenario necessitates the establishment of a collaborative environment within the marketing team, particularly during the initiation of new product launches. However, in practice, functional conflicts often arise due to a lack of alignment in perceptions of objectives and ambiguity in roles between the Graphic Design Team, which is oriented towards visual creativity, and the Data Analyst Team, which emphasizes data-based validation. These conflicts frequently impede effective decision-making processes and diminish the team's overall performance. The objective of this study is to examine the efficacy of implementing the Belbin Team Role Model as a diagnostic instrument and behavioral intervention to address role conflicts and align perceptions of work objectives within the Marketing Team at PT XYZ.The present study employed a qualitative approach, utilizing an exploratory case study design. The subjects of the research study comprised eight individuals from the Marketing Team at PT XYZ. The data collection techniques employed in this study included the Belbin Self-Perception Inventory (SPI), observational assessments, and in-depth interviews conducted prior to and following the intervention. The data were then subjected to thematic analysis, a method of data interpretation that seeks to identify patterns of conflict, role clarity, and changes in teamwork dynamics. The results of the study indicate an imbalance in the composition of team roles, characterized by the dominance of Plant and Shaper roles and the absence of Monitor Evaluator roles. This imbalance has been shown to trigger conflict between creative and analytical orientations. The application of the Belbin Model has proven effective in providing a neutral role language, increasing role clarity, and transforming dysfunctional conflict into constructive discussion. This intervention has been demonstrated to facilitate the alignment of perceptions regarding team objectives by integrating visual creativity and data validation in a more balanced manner.
Pengaruh Penggunaan Abu Kayu Jati sebagai Subtitusi Semen pada Beton Pori Kusuma, Priba Dwi; Rochmah, Nurul
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

His study aims to analyze in depth the effect of teak wood ash substitution as a partial replacement for cement on the compressive strength of porous concrete. Teak wood ash was selected as an alternative material because, in addition to being abundantly available as wood waste, it also has the potential to reduce cement consumption, thereby contributing to lower carbon emissions and reduced concrete production costs. This research employed a systematic laboratory experimental method with teak wood ash substitution variations of 0%, 1%, 2%, 3%, and 5% by weight of cement. Each mixture was carefully tested to determine its effect on the compressive strength of porous concrete at 28 days of curing age, in accordance with applicable concrete testing standards. The test results showed that porous concrete without teak wood ash substitution produced the highest compressive strength of 8.32 MPa. Meanwhile, the compressive strength values for substitutions of 1%, 2%, 3%, and 5% were 6.84 MPa, 7.39 MPa, 6.84 MPa, and 5.73 MPa, respectively. These results indicate that the addition of teak wood ash tends to reduce the compressive strength of porous concrete; however, the 2% substitution variation showed the best performance among all variations. The decrease in compressive strength at higher substitution levels is presumed to occur due to the reduction in cement as the main binding material and the increase in air voids within the concrete, resulting in a less dense concrete structure. Therefore, a 2% teak wood ash substitution can be considered the optimum level for producing porous concrete that still possesses adequate strength while being more environmentally friendly and cost-effective.
Pemanfaatan RCA, GGBS dan FA sebagai Bahan Substitusi Campuran Beton Ramah Lingkungan Aep Saepuloh; Ade Suhendar S.
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4759

Abstract

Industrial and construction waste has become a major environmental issue that contributes to ecosystem degradation, increased carbon emissions, and excessive exploitation of natural resources in the construction sector. Continuous use of cement and natural aggregates also increases energy consumption and environmental damage caused by construction material mining activities. This study aims to analyze the utilization of Recycled Concrete Aggregate (RCA), Fly Ash (FA), and Ground Granulated Blast-Furnace Slag (GGBS) as substitution materials in environmentally friendly concrete mixtures and to evaluate their effect on concrete compressive strength. The research employed a quantitative experimental method referring to SNI 7656:2012 for concrete mix design and SNI 1974:2011 for compressive strength testing. RCA was used as a partial substitute for coarse aggregate, while FA and GGBS were used as partial substitutes for cement. Data analysis was carried out descriptively and quantitatively by comparing the compressive strength results of normal concrete and substituted concrete at the ages of 3, 7, 14, and 28 days using cylindrical specimens. The results showed that normal concrete achieved an average compressive strength of 67.01 MPa at 28 days, while substituted concrete achieved 45.72 MPa. Although the compressive strength of substituted concrete was lower than that of normal concrete, the strength continued to increase with curing age. The utilization of RCA, FA, and GGBS has the potential to reduce the use of natural materials, minimize carbon emissions, and support sustainable construction practices.
Evaluasi Tata Kelola TI Menggunakan COBIT 5 Domain DSS05 pada PT Pos Indonesia Regional Kalimantan Muhammad Khairul; Muhammad Fadilah; Yustian Servanda
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4943

Abstract

IT security governance has become an urgent organizational concern, as government agencies and state-owned enterprises managing sensitive data face escalating cybersecurity threats and stricter obligations under Indonesia's Personal Data Protection Law. PT Pos Indonesia, a long-established state-owned enterprise now processing personal data and financial transactions of millions of customers daily, has never had its IT security governance evaluated against an internationally recognized framework, leaving its actual capability level unknown despite operating with a notably limited internal IT team. This study aims to evaluate the capability level of IT security governance at PT Pos Indonesia Regional Kalimantan using the COBIT 5 framework, specifically the DSS05 (Manage Security Services) domain, to identify gaps against the targeted maturity level and formulate structured improvement recommendations. A descriptive quantitative approach was employed, with primary data collected through a 35-item Likert-scale questionnaire administered to twenty cross-divisional respondents via purposive sampling, complemented by semi-structured interviews with four key informants; capability levels were determined by converting average scores to the COBIT 5 Process Assessment Model scale and analyzed through gap analysis against the targeted Level 3 (Established). Results show an overall average score of 3.74, placing governance at Level 3, with five of seven sub-domains meeting the target while DSS05.02 (Network Security) and DSS05.03 (Endpoint Security) remained at Level 2 and DSS05.04 (Identity Management) exceeded expectations at Level 4. Recommended improvements include network segmentation, formal endpoint control policy, and sustained security awareness training.
Peran Infrastruktur TI dalam Mendukung Sistem Informasi Kasir pada Rajo Coffee N Roastery Fenny Purwani; Aulia Berliana Shanti; Awang Pramana Okta Rio; Dinda Ayu Ristianti
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4956

Abstract

Information technology infrastructure is an important factor in supporting the effectiveness of cashier information systems, especially in food and beverage businesses that require fast, accurate, and structured transaction services. However, the use of a Point of Sale system still depends on the readiness of supporting infrastructure, such as devices, networks, data management, users, security, and operational procedures. Rajo Coffee N Roastery has implemented a cashier information system, but several potential problems remain, including internet dependency, limited cashier devices, input errors, account security, and the need for regular data backup. This study aims to identify the components of information technology infrastructure that support the cashier information system at Rajo Coffee N Roastery, explain the role of each component in transaction activities, analyze operational constraints, and formulate recommendations for system development. This research uses a descriptive qualitative approach with a case study method. Data were collected through literature review, direct observation of cashier activities, and informal interviews with parties involved in business operations. The data were analyzed using descriptive analysis and SWOT analysis to identify strengths, weaknesses, opportunities, and threats in the use of the cashier system. The results show that the cashier system is supported by an Android tablet, PUTIAN POS thermal printer, POS application, IndiHome Wi-Fi network, transaction data, cashier user, access security, and transaction procedures. These components help accelerate ordering, automate payment calculation, print receipts, and store sales data. The study recommends device maintenance, alternative networks, password protection, user guidelines, regular data backup, QRIS integration, stock management, cloud-based reporting, role-based access, and customer loyalty features.
Komparasi ChatGPT-4o, Claude Sonnet, dan Gemini Pro dalam Deteksi Phishing Berbahasa Indonesia Menggunakan Pendekatan Zero-Shot Prompting Nur Rizky Aditya; Nur Hidayat; Yustian Servanda
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4962

Abstract

Phishing attacks targeting Indonesian internet users continue to grow in volume and sophistication, exploiting local slang, domestic financial institution names, and cultural context, yet the unique linguistic and cultural characteristics of Bahasa Indonesia remain underexplored in the scientific literature on AI-based cybersecurity. This study aims to comparatively evaluate three state-of-the-art Large Language Models (LLMs)—ChatGPT-4o (OpenAI), Claude Sonnet (Anthropic), and Gemini Pro (Google)—for their effectiveness in detecting Indonesian-language phishing threats. Using a zero-shot prompting approach, a curated dataset of 100 samples (46 phishing, 54 legitimate) representing real-world Indonesian phishing modus operandi across banking, e-commerce, government, and social media contexts was evaluated under identical experimental conditions. Inter-annotator reliability was confirmed using Cohen’s Kappa (κ = 0.858), and model performance was measured using Accuracy, Precision, Recall, and F1-score. Results show that Gemini Pro achieved the best overall performance (F1 = 0.967, Accuracy = 97.00%), followed by ChatGPT-4o (F1 = 0.930, Precision = 100%) and Claude Sonnet (F1 = 0.909, Accuracy = 92.00%). All three models demonstrated strong capability as zero-shot phishing detectors, highlighting the potential of generative LLMs as accessible, training-free components for AI-based cybersecurity systems in Indonesian-language environments, and offering practical guidance for selecting LLM tools for phishing detection in Indonesia.
Systematic Literature Review terhadap Efektivitas Firewall MikroTik dalam Mitigasi Serangan Jaringan Muhammad Najin; Rachel Ajerna Cecilia Gerungan; Yustian Servanda
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.4968

Abstract

cyberattacks, including Distributed Denial of Service (DDoS), brute-force attacks, flooding, and unauthorized access, may result in financial losses, data breaches, service disruptions, and damage to network infrastructure. Numerous studies have investigated the implementation of MikroTik firewalls using different methods, configurations, and case studies, resulting in varying levels of effectiveness. However, no systematic review has comprehensively summarized the effectiveness of MikroTik firewall implementations based on different attack types and firewall configurations. This study aims to analyze, compare, and evaluate the effectiveness of MikroTik firewalls in mitigating network attacks using a Systematic Literature Review (SLR) approach. The study adopted the PRISMA guidelines through the stages of identification, screening, eligibility assessment, and article selection based on predefined inclusion and exclusion criteria. Furthermore, the selected articles were analyzed using a comparative synthesis approach to identify implementation patterns, attack types, and the effectiveness of the firewall methods employed. The findings indicate that Firewall Filter Rules are the most frequently implemented method in MikroTik firewalls, whereas Firewall RAW provides better performance in mitigating high-traffic attacks such as DoS, DDoS, and Ping Attack. In addition, firewall effectiveness is influenced by the applied configuration, attack characteristics, and the hardware capacity of the router.
Physiological Workload Analysis of Mizusumashi Operators at PT. XYZ Using CVL and Work Energy Expenditure Methods Maulana Ardi Hidayanto; Musfikotun Al Khikmah; Hanif Rizki Muhidin; Rafly Qusyiari; Yudi Prastyo
Jurnal Sains dan Teknologi (JSIT) Vol. 6 No. 2 (2026): Mei - Agustus
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v6i2.5013

Abstract

This research analyzes the physiological workload of the mizusumashi operator at PT. XYZ. An automotive manufacturing company. The work process of the mizusumashi operator requires the operator to work for 8 hours by lifting production materials and supplying production materials to the main line with a load of approximately 10-15 kg per box, which has the potential to cause physical fatigue and occupational diseases. The purpose of this research is to identify the level of physiological workload experienced by the mizusumashi operator using two research methods. The research methods used include the measurement of ten pulses, the calculation of the cardiovascular load percentage, and also the calculation of work energy expenditure using the pulse rate. The calculation results show that the CVL percentage is 34.5%, which means this indicates that the physiological workload is classified as a moderate workload with a fatigue level within safe limits. The results of the calculation using the work energy expenditure calculation show that the operator experiences a physiological workload in the very heavy workload category because the operator expends work energy of >500 kcal/hour, which means it causes high physical fatigue and the risk of physical injury. Based on these calculation results, changes to the mizusumashi operator's workstation are recommended so that the work is more ergonomic, comfortable, safe, and avoids workplace accidents and occupational diseases.

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