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Bulletin of Engineering Science, Technology and Industry
Published by PT. RADJA INTERCONTINENTAL PUBLISHING
ISSN : -     EISSN : 30255821     DOI : https://doi.org/10.59733/besti
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering
Bulletin of Engineering Science, Technology and Industry | ISSN: 3025-5821 is a peer-reviewed journal that publishes popular articles in the fields of Engineering, Technology and Industrial Science. This journal is published 4 times a year, namely in March, June, September and December. We invite scientists, practitioners, researchers, lecturers and students from various countries and institutions to contribute to publishing their work and research results in the fields of Engineering, Technology and Industry.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 134 Documents
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HEAT PIPE INTEGRATION IN SOLAR PHOTOVOLTAIC/THERMAL (PV/T) SYSTEMS: A REVIEW OF DESIGN SYSTEM AND FUTURE OUTLOOK Mochammad Resha
Bulletin of Engineering Science, Technology and Industry Vol. 3 No. 4 (2025): December
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v3i4.156

Abstract

The integration of heat pipe technology into Solar Photovoltaic/Thermal (PV/T) systems presents a significant advancement for enhancing overall energy conversion efficiency by simultaneously generating electricity and recovering thermal energy. This review paper systematically examines the design, operational principles, performance, and future outlook of heat pipe-integrated PV/T systems. Heat pipes, as highly efficient passive two-phase heat transfer devices, effectively mitigate the critical issue of efficiency loss in PV modules caused by elevated operating temperatures. By utilizing internal evaporation-condensation cycles, they rapidly extract waste heat from PV cells, thereby lowering cell temperature, increasing electrical output, and enabling the recovery of useful thermal energy for applications such as water and space heating. The review categorizes and analyzes various heat pipe configurations, including conventional designs, Loop Heat Pipes (LHPs), and Pulsating Heat Pipes (PHPs), highlighting their respective advantages in terms of integration ease, long-distance heat transport, and high heat flux management. Despite their promising potential, key technological challenges such as thermal contact resistance, material compatibility, structural integrity, and economic viability are identified as barriers to widespread adoption. Future research directions emphasize the need for innovations in advanced materials (e.g., nanofluids), hybrid systems with Phase Change Materials (PCMs), optimized design through computational modeling, and the development of standardized testing protocols. Ultimately, heat pipe-integrated PV/T systems are poised to play a crucial role in the renewable energy transition, offering a compact, efficient, and sustainable solution for co-generation of electrical and thermal power.
ANALYSIS OF FACTORS CAUSING THE LOW SUBSCRIPTION LEVEL OF PDAM TIRTA SARI IN BINJAI CITY Feby Melanie; Ruri Prihatini Lubis; Dasar Martinus Sembiring; Said Iqbal Zaini; Sahri Muda; Rudi Iskandar; Ade Farnan Saragih; Suangro L.H. Sitanggang
Bulletin of Engineering Science, Technology and Industry Vol. 3 No. 4 (2025): December
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v3i4.157

Abstract

The low level of drinking water subscriptions at PDAM Tirta Sari in Binjai City is a problem that needs to be studied to determine the causal factors. This study aims to analyze the factors that most influence the low interest of the people of Binjai City in subscribing to PAM. The method used is a weighting and ranking analysis of several hypotheses related to tariffs, water quality, service continuity, network coverage, and the availability of alternative water sources. The results of the analysis indicate that the mismatch between PDAM Tirta Sari Binjai City's tariffs and the quality of services provided is the most dominant factor influencing the low level of subscriptions at PDAM Tirta Sari Binjai City. This factor is ranked first with the highest total value. Other factors that also influence are low water pressure, limited distribution network coverage, and the existence of alternative water sources, while the quality of PDAM Tirta Sari Binjai City's water sourced from the Bingai River Watershed (DAS) has the lowest influence compared to other factors.
“PERFORMANCE ANALYSIS AND OPTIMIZATION OF ACADEMIC DATA-BASED LEARNING SYSTEMS USING AN INDUSTRIAL ENGINEERING APPROACH” Mahira Nazhifa Faiha; Irsyah Fairuz Lintang; Syahdan Alfadhil; Aldi Rasmana Tarigan
Bulletin of Engineering Science, Technology and Industry Vol. 3 No. 4 (2025): December
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v3i4.159

Abstract

Advances in information technology have encouraged educational institutions to generate large amounts of student academic data, such as grades, attendance, and learning activities. However, in practice, this data is still mostly used for administrative purposes and has not been optimally utilized to improve the performance of the learning system. This study aims to analyze student academic performance patterns and optimize the performance of the academic data-based learning system at the senior high school (SMA) level from an industrial engineering perspective. This study uses a descriptive quantitative approach with a case study method at SMAS Al Azhar Medan. The research data consists of student academic data as secondary data and student perception data as primary data obtained through questionnaires. Data analysis techniques include descriptive statistical analysis, simple correlation analysis, and analysis of the gap between actual conditions and learning performance standards. The results show that attendance and assignment scores have a positive relationship with student learning outcomes. In addition, there is still a gap between actual learning performance and the ideal conditions set by the school. Based on these analysis results, this study produces recommendations for optimizing the learning system oriented towards process improvement and data-based learning decision making. This study is expected to be an initial reference in the development of an academic data-based learning system at the high school level.
SUSTAINABLE EGG SUPPLY CHAIN MODEL WITH GREEN SUPPLY CHAIN MANAGEMENT APPROACH Kimberly Febrina Kodrata; Hasan Sitorus
Bulletin of Engineering Science, Technology and Industry Vol. 3 No. 4 (2025): December
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v3i4.161

Abstract

This research aims to develop a sustainable egg supply chain model through the application of Green Supply Chain Management (GSCM). The research method used is qualitative with a literature study approach, through analysis of various relevant national and international journals. The results of the study show that the main dimensions of GSCM that affect the sustainability of the egg supply chain include green purchasing, green manufacturing, green distribution, reverse logistics, and green collaboration. The application of this concept is able to reduce production waste, reduce carbon emissions, increase cost efficiency, and strengthen the competitiveness of egg products in the market. The resulting conceptual model describes a circular supply chain system, where waste and production by-products can be reused as new inputs in the production process. Thus, GSCM is not only oriented towards economic efficiency, but also supports environmental and social sustainability in an integrated manner. This study recommends the importance of collaboration between farmers, distributors, and the government in strengthening the implementation of green supply chains in the egg agribusiness sector.
IMPLEMENTATION OF ROAD AND DRAINAGE INFRASTRUCTURE DEVELOPMENT BY THE PUBLIC WORKS DEPARTMENT OF SIMALUNGUN REGENCY Feby Milanie; Ruri Prihatini Lubis; Mhd. Ali Damanik; Anton Sahala Tua Banjarnahor
Bulletin of Engineering Science, Technology and Industry Vol. 4 No. 1 (2026): March
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v4i1.163

Abstract

Road and drainage infrastructure development is an important component in supporting community mobility, economic growth, and environmental sustainability. Simalungun Regency as a region with extensive road network coverage still faces various problems, such as high levels of road damage and suboptimal drainage system function. This study aims to analyze the implementation of road and drainage infrastructure development carried out by the Simalungun Regency Public Works Department, by reviewing factors that influence the effectiveness of its implementation, the level of development integration, and the role of community participation based on the theory of Success Factors in Managing Wastewater Infrastructure through Community Participation . The research method used is a descriptive qualitative approach with data collection techniques through documentation studies, observations, and interviews. The results of the study indicate that the implementation of road and drainage infrastructure development has been carried out in accordance with regional planning, but its effectiveness has not been optimal. Budget limitations, human resource capacity, weak supervision, and low community participation are the main factors inhibiting the success of development. In addition, the integration between road development and the drainage system is still low, thus affecting the sustainability of infrastructure. Therefore, it is necessary to strengthen integrated development governance, increase community participation, and optimize supervision and funding so that road and drainage infrastructure development can be sustainable and provide long-term benefits for the people of Simalungun Regency.
THE EFFECT OF PRICE AND WORD OF MOUTH ON PURCHASING DECISIONS WITH BRAND IMAGE AS AN INTERVENING VARIABLE AT WARKOP AGAM STABAT Fairuza Rikha Amri; Endang Sulistya Rini; Beby Karina Fawzeea Sembiring
Bulletin of Engineering Science, Technology and Industry Vol. 4 No. 1 (2026): March
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v4i1.165

Abstract

This study investigates the effects of price and word of mouth (WOM) on purchasing decisions, with brand image acting as an intervening variable. Conducted at Warkop Agam Stabat, a local coffee shop in Stabat, Indonesia, the study uses a quantitative research method involving primary and secondary data collection from 216 respondents. The data analysis includes descriptive statistics and Structural Equation Modeling (SEM). The findings reveal that price negatively affects both purchasing decisions and brand image, while WOM positively influences brand image but does not directly affect purchasing decisions. However, brand image significantly influences purchasing decisions and mediates the relationships between price, WOM, and purchasing decisions. This study contributes to the understanding of consumer behavior in the context of small local businesses.
THE EFFECT OF INSTITUTIONAL IMAGE AND EDUCATIONAL COST ON STUDENTS' INTEREST IN STUDYING AT NAMIRA MADINA HEALTH COLLEGE WITH BRAND TRUST AS AN INTERVENING VARIABLE Lidya Kesuma Sari; Endang Sulistya Rini; Beby Karina Fawzeea Sembiring
Bulletin of Engineering Science, Technology and Industry Vol. 4 No. 1 (2026): March
Publisher : PT. Radja Intercontinental Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59733/besti.v4i1.174

Abstract

This study aims to determine the effect of institutional image and educational cost on student interest through brand trust. This is an associative study, and the data used are quantitative. The data were obtained from primary and secondary data. The analytical methods used were descriptive statistical analysis and structural equation modeling. The population and sample in this study consisted of 297 members of the Mandailing Natal Regency generation Z community. The sampling technique used was accidental sampling. The results of this study indicate that institutional image has a positive and significant effect on brand trust, institutional image has a positive and significant effect on student interest, educational cost has a negative but insignificant effect on student interest, educational cost has a negative and significant effect on brand trust, brand trust has a positive and significant effect on student interest, institutional image has a positive and significant effect on student interest through brand trust, and educational cost has a negative and significant effect on student interest through brand trust among the Gen Z community in Mandailing Natal Regency.
TECHNICAL PERFORMANCE AND EFFICIENCY ANALYSIS OF A 300 KG/H CORN SHELLING MACHINE USING EXPERIMENTAL METHOD Eka Boangmanalu; Jandri Fan HT Saragi; Angga Bahri Pratama
Bulletin of Engineering Science, Technology and Industry Vol. 4 No. 1 (2026): March
Publisher : PT. Radja Intercontinental Publishing

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

Abstract

This study evaluates the technical performance and efficiency of a corn shelling machine with a capacity of 300 kg/h using an experimental method under field conditions. The research aims to determine machine performance in terms of working capacity, shelling efficiency, unshelled kernels, and total losses. Data were collected through three repeated experimental trials involving measurement of input-output weight and processing time. The results show that the machine operates at a stable capacity of 300 kg/h, consistent with its design specification. The average shelling efficiency reached 94.1%, indicating high separation performance. Unshelled kernels were recorded at 3.3%, while total losses were 2.6%, indicating low material waste. The machine demonstrates effective performance suitable for small to medium-scale corn processing. However, improvements in feeding uniformity and moisture control are recommended to enhance overall efficiency.
OPTIMIZATION OF SIGNALIZED INTERSECTION PERFORMANCE USING THE IHCM 1997 APPROACH IN AN URBAN INDUSTRIAL AREA: A CASE STUDY OF THE DAM MUKA KUNING INTERSECTION, BATAM Fauzan
Bulletin of Engineering Science, Technology and Industry Vol. 4 No. 1 (2026): March
Publisher : PT. Radja Intercontinental Publishing

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Abstract

Traffic congestion at signalized intersections in urban areas has become a critical issue as transportation activities increase due to economic growth and urbanization. The Dam Muka Kuning intersection in Batam City is one of the strategic intersections located within an industrial zone, characterized by high traffic volumes and significant vehicular movement complexity. This study aims to evaluate the performance of the signalized intersection based on capacity parameters and degree of saturation, as well as to formulate signal timing optimization strategies to improve the intersection's level of service. The method employed is a quantitative approach based on the 1997 Indonesian Highway Capacity Manual (IHCM), utilizing traffic volume data obtained from field surveys during peak hours. The analysis encompasses saturated flow, capacity, flow ratio, and degree of saturation for each intersection approach. The findings indicate that the intersection operates under oversaturated conditions, with degree of saturation (DS) values reaching 3.81 at the south approach, 2.55 at the west approach, and 1.88 at the east approach all of which substantially exceed the ideal threshold (DS ≤ 0.85). These conditions signify a significant deterioration in the level of service, marked by extensive queue lengths and high delays. The predominant factors contributing to congestion include high side friction, ingress and egress activities associated with the industrial zone, and signal timing configurations that have yet to adapt to traffic flow fluctuations. To enhance intersection performance, this study proposes a signal timing optimization strategy based on actual traffic conditions through the adjustment of cycle times and green time distribution. Furthermore, side friction management and geometric improvements at the intersection are necessary to support the effectiveness of traffic engineering measures. The findings of this study offer a practical contribution to the management of signalized intersections in urban areas experiencing high levels of saturation.
Advanced Integration of Aeromagnetic, Radiometric, and Multispectral Remote Sensing Data for Structural Characterization, Hydrothermal Alteration Mapping, and Mineral Prospectivity Modeling of Lithium–Cesium–Tantalum Pegmatites and Orogenic Gold in the Bo Gazala Yousuf Mir
Bulletin of Engineering Science, Technology and Industry Vol. 4 No. 2 (2026): June
Publisher : PT. Radja Intercontinental Publishing

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Abstract

This study employs an integrated geospatial and geophysical framework to assess the mineral prospectivity of the Borgu Area, Niger State, northwestern Nigeria, with particular emphasis on rare-metal pegmatites (lithium, beryl, and tourmaline) and orogenic gold systems. The study area is situated within the Nigerian Basement Complex of the Pan-African Mobile Belt and is predominantly underlain by granitic gneiss. Interpretation of aeromagnetic datasets reveals a well-defined NE–SW structural fabric characterized by faults, fractures, and lithological boundaries, which are interpreted as key controls on fluid migration and mineral emplacement. The Total Magnetic Intensity response is dominated by low-amplitude anomalies, indicative of magnetite-depleted felsic lithologies typically associated with Lithium–Cesium–Tantalum (LCT) pegmatite systems. Source Parameter Imaging further constrains the depth to magnetic sources to approximately 120–180 m, suggesting relatively shallow subsurface conditions favorable for exploration.Radiometric analysis delineates zones enriched in potassium and thorium, reflecting highly evolved granitic systems with potential for rare-metal mineralization. Complementary remote sensing analysis based on Landsat imagery identifies diagnostic hydrothermal alteration signatures, including iron oxide staining, clay mineral development, and silica enrichment. The integration of geophysical, radiometric, and spectral datasets within a GIS-based analytical framework enabled the systematic delineation of ten high-priority exploration targets. The combined results highlight the strong influence of lithological composition, structural architecture, and hydrothermal processes on mineralization within the Borgu basement terrain. These findings underscore the exploration potential of the area and provide a robust basis for subsequent field validation, including detailed geological mapping, geochemical surveys, and targeted ground geophysical investigations.

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