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Journal of Technology and Engineering
Published by Yayasan Banu Haji Samsudin
ISSN : -     EISSN : 30254094     DOI : 10.59613
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy
Jurnal ini merupakan sarana publikasi ilmiah untuk menyebarluaskan informasi berupa ilmu pengetahuan dan terlebih khususnya hasil penelitian hasil penelitian, jurnal ini juga menerima manuskrip hasil kajian pustaka dan laporan lainnya untuk dipublikasikan.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 47 Documents
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Influence of Fixed Carbon Carburizer on The Hardness and Microstructure of Cast Iron FC 25 Putra, Adi Ganda; Ghose, Aurobindo; Pawawoi; Sukmara, Sony
Journal of Technology and Engineering Vol 1 No 2 (2023): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v1i2.226

Abstract

Cast iron smelting is carried out with the main materials, namely steel scrap (C) 0.08% and recycled material FC 25 (C) 3.37% so that the mixture of the two raw materials results in the carbon content being less than the FC 25 target which has a content range (C) between 3.10% – 3.40% (JIS G 5501). In order for element (C) to meet the material standardization criteria, a carburizer is used as an addition to element (C) in the smelting process. This research uses an induction furnace with a capacity of 1500 kg for the melting process. Metallographic testing aims to see the comparison of the microstructure that occurs. Brinell hardness testing is carried out by providing 5 point indent traces on the surface. (α) and 2 points in the phase (α+Fe3C). The research results show that the addition of element (C) using a carburizer with a fixed carbon content of 91.57% and 96.7% in casting FC 25 material affects the value of material hardness, phase hardness and microstructure in FC 25 material. The use of carburizers with different contents This does not affect the graphite shape, graphite type and graphite size. The use of a 96.7% carburizer produces a Brinell hardness value of 205 HB, Vickers 259 HV and a pearlite phase percentage of 59% which is higher than a 91.67% carburizer which produces a Brinell hardness value of 184 HB, Vickers 238 HV and a pearlite phase percentage of 56%.
Service Life Assessment and Safety Inspection of Pressure Vessels: A Comprehensive Analysis of Structural Integrity and Performance Putra, Adi Ganda; Putra, Muhammad Prima Andika; Matijanti; Pawawoi
Journal of Technology and Engineering Vol 1 No 2 (2023): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v1i2.232

Abstract

Pressure vessel is a container used to store fluids and is very necessary for various industrial activities. Fluids stored in pressure vessels are fluids that have special characteristics and treatment, such as fluids at low or high temperatures, pressurized fluids and so on. In general, a pressure vessel is a container made of metal. Materials that contain metal will definitely experience corrosion. Corrosion can occur, one of the reasons is because there is a chemical reaction on the metal surface caused by the low pH of the water and humid air, so that the metal becomes thinner over time. This will affect the strength of the metal to withstand pressure. The thinner the metal, the less pressure it can withstand. With corrosion, the pressure vessel's ability to withstand pressure will decrease. If the pressure held is higher than the capacity of the pressure vessel, it can cause work accidents. This research will analyze the service life of pressure vessels using inspection procedures based on Minister of Manpower Regulation Number 37 of 2016 concerning Occupational Safety and Health of Pressure Vessels and Storage Tanks. To calculate the effect of thickness on the pressure of the pressure vessel, it will be based on the formula obtained from ASME sec VIII, div.1 regarding boilers and pressure vessels. The pressure vessel that will be tested is of the Jiangsu Ashun brand at PT. Setia Gas Jaya. From the results of analysis and testing, it shows that the pressure vessels at PT. Setia Gas Jaya has the point that experiences the most corrosion, namely at the bottom-head, which was originally 6.8 mm to 6.62 mm after 2 years and 3 months of operation. The results of the analysis also show that with a working pressure of 3.3 MPa, the pressure vessel can be operational for 13 years 3 months 13 days, or its remaining useful life is 11 years 13 days starting from June 2023.
Development of Hand Movement Assistive Devices for Mild Stroke Patients Based on Arduino Uno Saadah, Dian; Siswiyanti, Siswiyanti; Budiraharjo, Eko; Budihartono, Eko
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.278

Abstract

Stroke is one of the leading causes of physical disability worldwide, including in Indonesia. In the Tegal area, the number of stroke sufferers continues to increase, causing many individuals to experience difficulties in performing daily activities, especially impaired motor function in the hands. Rehabilitation is an important step in the recovery of stroke patients, but the facilities and rehabilitation aids available in the Tegal area are still limited and expensive. This study aims to design and develop an Arduino Uno-based hand motion aid that is affordable and easily accessible to stroke patients in the Tegal area. The research method includes anthropometric methods with the results taken as the largest percentile, namely P95 in cm Lij (2.4), Pij (6.6), Ljt (2.1), Pjt (8), Ljtg (2.1), Pjtg (8.7), Pjm (2.1), Ljm (8.2), Pjk (1.9), Ljk (6.2), Pt (19.5), Ptt (10.9), Ltmk (9.1), Ltij (11.8), Ttij (6.5), Ttm (3.3), Tij (1.9), Tj (1.6), Ltm (10.9), Ptm (13.8), Jjk (20.6), Dgmak (6.6), Dgmin (4.5), Tgkt (6.7), Lkt (11.1). Testing on ten mild hand stroke patients aged 30-70 years, as well as evaluation of effectiveness through the distribution of questionnaires. The results of the study showed that the developed assistive device significantly improved the patient's hand motor function, with 40% of respondents agreeing that the device is easy to install and remove, and 30% agreeing that it can be used independently. The device also received positive responses regarding its comfort and effectiveness, with 50% of respondents agreeing that the device responded well to hand stimulation. In conclusion, the Arduino Uno-based hand motor aid has great potential for use in the rehabilitation of stroke patients in Tegal, and can be an effective solution to improve their quality of life.
Making Holing Machine for AC Connecting Tube Product K25G Soetopo, Antonius Adi; Suseno, Suseno
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.279

Abstract

Holing Machine is an after pressing tool that functions to make holes in the product. This Holing Machine is specifically used to make holes in the Tube AC ​​Connecting K25G product that has finished the pressing process. The after pressing process of making holes in the Tube AC ​​Connecting K25G product was previously done manually with the help of marking and Air Grinder. This method takes quite a long time, which is about 8 minutes to make holes in 4 Tube AC ​​Connecting K25G products, resulting in wasted production time. This led to the creation of a Holing Machine to help the process of making holes in the Tube AC ​​Connecting K25G product so that it can be done automatically. The Holing Machine is made with several stages of the manufacturing process starting with the process of making machine construction drawings, the process of selecting and preparing materials by the company, the machining process for making parts, the part assembly process and the trial process. From these stages, an estimate of the processing time and cost of the Holing Machine manufacturing process can be obtained. With the creation of this Holing Machine, it is expected to reduce the waste of time in the hole making process on the Tube AC ​​Connecting K25G product by up to 22.59% from the previous hole making process time of 49.31% so that the waste of time in the production process of the Tube AC ​​Connecting K25G product can be reduced. That way, the productivity of making the Tube AC ​​Connecting K25G product can be increased.
Analysis of the Performance Evaluation of the Population and Civil Registration Service of Surabaya City using the Performance, Information, Economic, Control, Efficiency, Services (PIECES) Method Maliki, Muhammad Yazid Basthomi; Primandari, Puteri Noraisya
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.284

Abstract

The research was conducted to meet the needs of users, namely the people of Surabaya City, for that it is necessary to have an analysis and evaluation of the measurement of the level of user satisfaction with the population administration information system at the Surabaya City Population and Civil Registration Service, namely the Klampid New Generation website. The data collection methods used were interviews, observations and questionnaires. In this study, the system evaluation method used the PIECES method consisting of 6 aspects of Performance (performance) Information (information), Economy (economy), Control (control), Efficiency (efficiency), and Service (service). Analyzing the questionnaire data, descriptive statistics were carried out to determine the characteristics of the data, validity and reliability tests to determine the quality of valid/accurate and reliable questionnaire data. normality test, correlation test and multiple linear regression test. Then evaluate the system by calculating the average questionnaire results to determine the level of satisfaction. The results of the study showed that the average level of satisfaction from the 6 aspects of the PIECES method was Performance 3.81 with the Satisfied category, Information 4.16 with the Very Satisfied category, Economic 3.95 with the Satisfied category, Control 4.06 with the Satisfied category, Efficiency 3.88 with the Satisfied category, and Services 3.87 with the Satisfied category. Based on the calculation results for each PIECES Framework variable, the total average value obtained was 3.95 with the description Satisfied, so it can be concluded that the Klampid New Generation website provides satisfactory results for its users. 5 categories of Satisfied and 1 Very Satisfied so that the Klampid New Generation population administration information system is quite effective and efficient for users, especially the people of Surabaya City and is a material for further development. The results of linear regression show that all 6 aspects of the PIECES method have a significant influence on user satisfaction.
Evaluation of Technology Use in Supporting the Teaching and Learning of Christian Religious Education at Arastamar Theological Seminary Wamena Ballen, Zofar Wilson; Rasinus, Rasinus; Rukua', Ivo Sastri; Karlau, Sensius Amon; Tasak, Edie Rante
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.313

Abstract

This study is motivated by the question of how effectively technology can support the teaching and learning of Christian Religious Education at Arastamar Theological Seminary Wamena, an institution operating within the geographical and digital infrastructure limitations of Papua. The author argues that technology holds strategic potential to expand access, enhance interactivity, and enrich the learning experience of theology students; however, its integration must be sensitive to the social, cultural, and spiritual context of Papuan society. Theories of technology-based learning and Christian pedagogy suggest that technology can serve as an effective tool when critically and contextually adapted. This research employs a qualitative method involving interviews, observations, and document analysis to evaluate the practice of technology use at Arastamar Theological Seminary Wamena. The findings indicate that digital technology has been integrated into the curriculum and has positively influenced the quality of learning, though significant challenges remain—particularly in terms of infrastructure, digital literacy, and resistance among some lecturers and students. The study concludes that technology can strengthen the process of Christian religious education when managed wisely and contextually, and it highlights the need for continuous policy development and training for Christian educators in remote regions.
Developing Sustainable High-Volume Fly Ash Concrete with Enhanced Self-Consolidating Capabilities Risdianto, Yogie
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.374

Abstract

This study explores the potential of high-volume fly ash concrete (HVFAC) with enhanced self-consolidating capabilities as a sustainable alternative to traditional concrete. The primary issue addressed is the environmental impact of cement production, which contributes significantly to CO2 emissions. The study aims to optimize the use of fly ash in concrete mixtures to reduce CO2 emissions while maintaining concrete's strength, workability, and durability. A library research methodology was employed, analyzing existing literature on HVFAC, self-consolidating concrete, and sustainable concrete development. The research reveals that while high fly ash content can slightly reduce early-age strength, it enhances long-term durability and resistance to chemical attacks. The integration of superplasticizers is essential to improve self-consolidating properties, allowing the concrete to flow smoothly without mechanical compaction. Additionally, the study emphasizes the significant environmental benefits of HVFAC, including reduced CO2 emissions and resource conservation. However, challenges remain in optimizing the mix design and achieving a balance between fly ash content, strength, and workability. The research concludes that HVFAC has substantial potential for sustainable construction practices, provided that future research addresses the remaining challenges and refines mix designs for broader application.
Enhancing the Growth and Yield of Lembah Palu Shallot Variety (Allium wakegi Araki) Using Azotobacter sp. Maemunah, Maemunah; Marhani, Marhani; Fadilah D, Fani
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.379

Abstract

Nitrogen is the main component of protein, relatively unavailable to plants even though nitrogen molecules account for 80 percent of the total elements in the atmosphere. Azotobacter bacteria can play a role in increasing soil fertility and are capable of fixing free nitrogen from the air. This study aims to examine the optimal concentration of Azotobacter sp. bacteria for shallot plants of the Lembah Palu variety to support growth and production. This research was conducted at the Agronomy Laboratory and Screen House of the Academic Garden, Faculty of Agriculture, Tadulako University, Palu, from August 2024 to July 2025. The experiment was arranged using a Completely Randomized Design (CRD) consisting of five treatments with three replications. The treatments included control (without Azotobacter sp.), 100 ml Azotobacter sp., 1:5 (17 ml Azotobacter sp. + 83 ml water), 1:10 (9 ml Azotobacter sp. + 91 ml water), and 1:15 (6 ml Azotobacter sp. + 94 ml water). The results showed that the application of Azotobacter sp. did not significantly affect most growth and yield parameters. Significant effects were only observed on root volume and total soluble solids. The treatment with 100 ml Azotobacter sp. produced the highest root volume (4.00 ml) and total soluble solids (16.20 °Brix) compared to the other treatments. These findings indicate that the application of Azotobacter sp. mainly influenced root development and soluble solid content rather than overall plant growth and yield of Lembah Palu shallots.  
PUBLIC ETHICS PUBLIC ETHICS IN THE CLEAN ENERGY TRANSITION: THE MORAL DILEMMA OF GEOTHERMAL DEVELOPMENT IN FLORES ISLAND: PUBLIC ETHICS IN THE CLEAN ENERGY TRANSITION: THE MORAL DILEMMA OF GEOTHERMAL DEVELOPMENT IN FLORES ISLAND Ndolu, Rizhard Anselmus; Taopan, Henda; Banunaek, Noni
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.318

Abstract

The transition toward clean energy in Indonesia presents a complex ethical dilemma, particularly in the context of geothermal energy development on Flores Island. Through the Flores Geothermal Island policy, the government aims to establish Flores as a national laboratory for clean energy. However, behind the narrative of a low-carbon transition lies a deep moral and social tension between the state, corporations, and Indigenous communities. This study employs a qualitative descriptive approach based on document analysis and ethical interpretivism to examine the interrelations among social legitimacy, ecological justice, and public ethics in geothermal energy governance. The analysis reveals the dominance of an economic utilitarian paradigm in national energy policy (40%), emphasizing efficiency and investment, while the values of ecological justice (30%), public ethics and participation (20%), and local spirituality (10%) remain marginalized. This imbalance indicates a deficit of public ethics in the clean energy transition process in Flores. The findings highlight the urgent need to transform energy policy ethics from a technocratic orientation toward a paradigm rooted in social, ecological, and spiritual justice. Therefore, clean energy should not be viewed merely as a technological project but as a moral project that honors both humanity and nature.
BIODURIPAVE : INNOVATION OF DURIAN SHELL BIO-OIL IN BIO-ASPHALT PRODUCTION TO REDUCE FOSSIL ENERGY DEPENDENCE Zahra, Ilma; Salsabila, Nabila; Sabyla Laila Putri
Journal of Technology and Engineering Vol 3 No 2 (2025): Journal of Technology and Engineering
Publisher : Yayasan Banu Haji Samsudin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/journaloftechnologyandengineering.v3i2.321

Abstract

Amid the challenges of fossil energy dependence and the environmental impact of the road construction industry, bio-asphalt innovation emerges as a sustainable solution. This study introduces BIODURIPAVE, a bio-oil derived from durian peel waste (Durio zibethinus), as a partial substitute for bitumen in Hot Mix Asphalt (HMA). The bio-oil is extracted through fast pyrolysis at temperatures of 300–500°C, yielding a calorific value of 24.674 MJ/kg with contents of cellulose, hemicellulose, and lignin. The optimal proportion of bio-oil is 5–8% in Pen 60/70 bitumen or Asbuton B 50/30. The results show a reduction in CO₂ emissions by up to 20–30% based on Life Cycle Assessment (LCA), improved oxidation resistance, and enhanced mechanical stability (penetration 60–70, softening point >50°C, Marshall stability >1000 kg). SWOT analysis identifies strengths in local raw materials, opportunities in the circular economy, as well as challenges related to pyrolysis technology and incomplete regulatory frameworks. Implementation is planned in four phases: R&D (2025), pilot (2026), scalability (2027), and national standardization (2028), with potential cost savings of 12–15% per kilometer of road and the creation of 10–15 rural jobs per 5-ton daily production unit. This innovation aligns with the Sustainable Development Goals (SDGs) 7, 9, and 13.

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