Briliant: Jurnal Riset dan Konseptual E-ISSN: 2541-4224, P-ISSN: 2541-4216 published by Universitas Nahdlatul Ulama Blitar. Published four times a year in print and online. Journals are published every three months, in February, May, August and November. The topic of the article contained in this journal is the result of research and thinking about the development of education and learning, Science and Technology. The focus in this Brilliant Journal covers the results of a research and development study in Education and Learning, Science and Technology; Scope of articles in Brilliant Journal of Education and Learning at the level of early education, primary and secondary education; Informal Education and Society; Educational psychology; Education Management; Evaluation of Learning and Education; Learning, Technology, Development and Application of Science both natural and social, Development and Application of Technical Science, and Technology Development.
Ekstraksi Alumina dan Besi dari Limbah Fly Ash Menggunakan Asam Sulfat
Fly ash contains alumina and iron that are generated during industrial production processes. Effective utilization of fly ash requires a clear understanding of its physical and chemical properties to ensure optimal use. Fly ash comprises various components, including 13.05 wt% SiO₂, 16.04 wt% Al₂O₃, 36.06 wt% Fe₂O₂, and 6.20 wt% CaO. The objective of this inquire about was to decide the degree to which alumina and iron can be extracted by means of sulfuric acid (H₂SO₄) leaching. The experimental variables included extraction temperature 85, 90, 95, 100, and 120°C and H₂SO₄ concentration at 3, 6, 9, 12, and 15% by volume. The procedure began with standardizing the fly ash by grinding to 60 mesh, followed by washing and drying. Next, the extraction process was carried out for 60 minutes with the addition of an aqueous H₂SO₄ solution. The coming about filtrate was analyzed utilizing Nuclear Retention Spectrophotometry (AAS) to evaluate the concentrations of broken up aluminum and iron. The highest extraction rates were achieved at 120°C with 15% H₂SO₄, yielding approximately 2.79% Al and 7.61% Fe.
Copyright (c) 2026 Briliant: Jurnal Riset dan Konseptual https://creativecommons.org/licenses/by-sa/4.0
Analisis Pemanfaatan Madu Hutan (Apis dorsata) Berbasis Konservasi di Taman Nasional Ujung Kulon
This study aims to formulate an optimization strategy for sustainable wild honey (Apis dorsata) utilization within the Ujung Kulon National Park, specifically on Panaitan Island. Adopting a mixed-methods approach, the research integrates spatial ecological analysis, socio-economic mapping of the Wild Honey Farmers Group (KPMH), and strategic evaluation using SWOT and Analytical Hierarchy Process (AHP) methods. Ecological analysis reveals that honeybees predominantly select Kiara, Tongtolok, and Kepuh as host trees, with an average nest height of 18.2 meters. Although the KPMH has implemented sustainable harvesting practices, business sustainability remains hindered by limited working capital, low post-harvest product quality, and the fluctuating risk of forest fires. The SWOT analysis positions the strategy in Quadrant I (Aggressive), supported by internal and external scores of +0.67 and +2.23, respectively. Meanwhile, the AHP results prioritize post-harvest quality improvement and collective capital access (score 0.391). This research concludes that strengthening economic sustainability is an absolute prerequisite for ensuring conservation compliance and habitat preservation through the transfer of dehumidifier technology, business legalization, and the establishment of an integrated aggregator cooperative.
Development of Teaching Materials for The Course Evaluation and Curriculum Development with Project-Based Learning for Students of S-1 Educational Technology at UNESA
This study aims to develop interactive teaching materials using a project-based learning approach and examine their effectiveness in enhancing students’ learning independence. The study employed a development research design combined with an experimental approach, following the ADDIE model (analysis, design, development, implementation, and evaluation). The participants consisted of 64 undergraduate students in the Educational Technology program at Surabaya State University, divided into an experimental group and a control group using a posttest-only control group design. The developed teaching materials were validated by one media expert and one material expert. The feasibility results indicated that the materials were highly feasible, with a score of 100% from the media expert and 87.17% from the material expert. To test effectiveness, students in the experimental group used the interactive teaching materials for independent learning, while the control group relied on conventional materials. Data were collected using questionnaires measuring students’ learning independence and analyzed using an independent samples t-test. The results showed that the experimental group achieved a higher mean score (M = 82.89) compared to the control group (M = 73.51). Statistical analysis revealed a significant difference between the two groups (p < .001), indicating that the developed teaching materials had a positive effect on students’ learning independence. These findings suggest that interactive teaching materials integrated with project-based learning can effectively support independent learning in higher education contexts and provide a practical solution to enhance student autonomy.
Pengaruh Google Earth terhadap Hasil Belajar Geografi Siswa SMA: Studi di SMA Negeri 4 Gorontalo
This study aims to determine the effect of using Google Earth as a learning medium on students’ learning outcomes in Geography at SMA Negeri 4 Gorontalo. The research employed a quasi-experimental design with a one-group pretest-posttest model. The independent variable in this study was the use of Google Earth, while the dependent variable was the students’ learning outcomes. Data collection techniques included observation, documentation, and pretest-posttest assessments. The data were analyzed using normality tests, paired sample t-tests, gain index analysis, and descriptive statistics. The reliability test showed an alpha coefficient of 0.892, indicating high reliability. The gain index reached 0.73 or 73.10%, categorized as moderate, which demonstrates that Google Earth is effective in improving students’ understanding of remote sensing materials related to land use. The results of the study indicate that Google Earth is effective as a visual-spatial learning medium that enhances students’ conceptual understanding of remote sensing materials, particularly in the context of land use. This study concludes that the use of Google Earth has a positive effect on students’ learning outcomes.
Evaluasi Kebijakan Zonasi Terhadap Masyarakat Kurang Mampu: Halangan dan Solusi
Education is a fundamental right of every citizen that the state is obliged to guarantee, particularly for underprivileged communities. The zoning policy in the New Student Admission System (SPMB) was introduced as an effort to equalize access to education in Indonesia. This study aims to evaluate the implementation of the zoning policy and educational assistance programs such as PIP and PKH for underprivileged communities in Sidoarjo Regency using an ex ante evaluative approach with a qualitative library research method. The evaluation was conducted based on six criteria by William N. Dunn, namely effectiveness, efficiency, adequacy, equity, responsiveness, and appropriateness. The results indicate that the effectiveness, efficiency, and equity criteria performed relatively well, where the affirmation pathway met the 15% quota, PIP funds were distributed without waste, and various SPMB pathways provided proportional benefits. However, adequacy and responsiveness emerged as the main weaknesses, marked by 72 school dropout cases, low utilization of funds for educational purposes, and insufficient program socialization to parents. Regular face-to-face socialization, active mentoring, and cross-sector coordination are needed to optimize the zoning policy for underprivileged communities.
Pengaruh Gratitude dan Wisdom terhadap Hedonisme pada Mahasiswa Universitas Negeri Semarang
A hedonistic lifestyle is increasingly found among college students. This condition not only changes shopping patterns and outlook on life, but also impacts psychological conditions and character formation. This study aims to determine the effect of gratitude and wisdom on a hedonistic lifestyle in college students. The research design used is quantitative with a correlational approach. This study involved 544 active college students through a cluster sampling technique. Data were collected using a Likert scale consisting of a gratitude scale (α = 0.858), a wisdom scale (α = 0.812), and a hedonism scale (α = 0.867). Data analysis used multiple linear regression after the classical assumption test was met to examine the simultaneous and partial effects of both independent variables on a hedonistic lifestyle. The results of the hypothesis test showed that gratitude and wisdom were negatively related to hedonism in college students where gratitude (β = -0.191), wisdom (β = -0.149), while both variables simultaneously influenced hedonism with a significant value of (R2 = 0.128). These findings confirm that developing gratitude and wisdom can be a preventive strategy for a hedonistic lifestyle, contributing to character education and positive psychology in higher education.
Pengaruh Budaya Organisasi dan Perceived Organizational Support terhadap Work Engagement Pada Karyawan Perusahaan Industri Manufaktur di Kota Bandung
This study aims to determine whether organizational culture and perceived organizational support influence work engagement among employees working in the manufacturing industry. The research subjects were employees actively working in manufacturing companies in Bandung City. Through a nonprobability sampling technique, 228 employees working in the manufacturing industry in Bandung City were obtained. Data were analyzed using multiple linear regression methods to test the relationship between variables. The research findings show that organizational culture and perceived organizational support have a positive and significant effect on work engagement. This means that companies with a positive organizational culture that emphasizes caring, clear work targets, management systems, and responsibility can foster employee enthusiasm and engagement with their work. Furthermore, when employees feel that the company cares, values ​​their contributions, and supports their well-being, this can foster positive reciprocal relationships and lead employees to be more enthusiastic, focused, and involved in their work. The results of this study can be implied by the management of manufacturing companies for the development of human resource programs.
Model Konsep Net Benefit Aplikasi Coretax Menggunakan Pendekatan DeLone & McLean
To support economic transformation and enhance the quality of economic growth in the taxation sector, the Indonesian government has reformed its tax administration system through the implementation of the Coretax application. Coretax is an integrated core tax administration system designed to unify all tax administration processes within a single digital platform to improve efficiency, transparency, and the quality of tax services. However, the success of system implementation is not solely determined by technological adoption, but also by the extent to which the system delivers tangible benefits to its users. This study aims to develop a conceptual model for evaluating the success of Coretax implementation by adapting the DeLone and McLean Information Systems Success Model. The study employs a conceptual research approach through literature review and synthesis without involving empirical data collection. The proposed model consists of six main constructs: Coretax System Quality, Coretax Information Quality, Coretax Service Quality, Coretax Use, Coretax User Satisfaction, and Net Benefits of Coretax Implementation. The findings result in a conceptual framework and hypothesis model that may serve as a foundation for future empirical studies in evaluating the effectiveness of Coretax implementation in Indonesia.
Efektivitas Aplikasi Desain Grafis Berbasis Artificial Intelligence dalam Meningkatkan Keterampilan Desain Logo Produk UMKM
Surviving and running a business in the era of Industry 4.0, which emphasizes the widespread transformation of digital technology use, is certainly a challenge for MSME players. The purpose of this study is to provide teaching intervention in graphic design for MSME product packaging and logos using AI-based applications. This study uses a mixed-methods design with a structured intervention over eight weeks involving 20 MSME participants. The stages of this study include (a) initial assessment and participant selection, (b) intervention procedures, (c) post-intervention assessment, and (d) data evaluation and analysis. The results show that this framework is effective; all participants successfully exceeded the competency threshold (70%) and showed a significant increase in design creativity. Thus, it is concluded that the integration of AI through structured teaching is an evidence-based strategy for accelerating MSME digital design literacy, providing important implications for empowerment programs and digital economic transformation.
Strategi Coping dan Stres Akademik pada Mahasiswa Berpacaran: Peran Moderasi Dukungan Sosial
Academic stress is a form of psychological pressure frequently experienced by university students due to demanding academic responsibilities, especially among students in early adulthood who are involved in romantic relationships. To manage these pressures effectively, students need adaptive coping strategies. In addition, social support is considered an important factor that can help students deal with academic stress through emotional and instrumental assistance. This study aimed to examine the relationship between coping strategies and academic stress among university students in romantic relationships in Surabaya, as well as to investigate the moderating role of social support in this relationship. The study employed a quantitative correlational design involving 167 university students from several higher education institutions in Surabaya who were currently in romantic relationships. Data were collected using coping strategies, academic stress, and social support scales based on the theories of Lazarus and Folkman (1984), Bedewy and Gabriel (2015), and Sarafino and Smith (2014). Data analysis was conducted using Moderated Regression Analysis (MRA). The findings revealed a significant relationship between coping strategies and academic stress. Moreover, social support significantly moderated this relationship by helping students optimize coping strategies when facing academic demands.
Hubungan Antara Resiliensi dan Flourishing yang Dimoderasi oleh Dukungan Sosial pada Caregiver Lansia
The increasing elderly population in Indonesia creates an urgent need for caregivers who can not only bear the burden of caregivers but also achieve optimal thriving conditions. This study aims to analyze the relationship between resilience and thriving, and examine the role of social support as a moderating variable among elderly caregivers. This quantitative correlational study involved 119 elderly caregivers (54 formal, 65 informal) selected through purposive sampling. Data collection used three instruments: Flourishing Measure (10 items, α=0.782), Connor-Davidson Resilience Scale (23 items, α=0.860), and Social Support Scale (15 items, α=0.818). Data analysis used Moderate Regression Analysis. Resilience showed a significant positive relationship with thriving (Z=6.47, p<0.001). Social support demonstrated a direct effect on thriving (Z=2.63, p=0.009) but was not shown to be a moderator (Z=-1.66, p=0.097). Resilience served as a significant predictor of thriving among elderly caregivers. The effectiveness of social support depends on its alignment with the caregiver's specific needs.
Pengembangan MODISA (Modul Pendidikan Seks Bagi Remaja) Untuk Mencegah Perilaku Seks Bebas Pada Siswa SMA
The research was motivated by the increasing sexual behavior among adolescents due to low knowledge, environmental influences, and a lack of sex education. Therefore, MODISA was developed as a means of preventing promiscuous sexual behavior. The research aims to describe adolescents' understanding of sex education, map existing prevention efforts, and develop relevant, interesting, and appropriate modules. The method used in Research and Development with the ADDIE model includes the stages of analysis, design, development, implementation, and evaluation, which is limited to the development stage in the form of testing the feasibility of the module by experts and prospective users. Interview data analysis used the Miles and Huberman interactive model assisted by MAXQDA 2026 software, while the product acceptability analysis used the inter-rater agreement model. The results of the MODISA research respond to the needs of students and guidance counselors for comprehensive, easy-to-understand sex education materials equipped with illustrations. The validity test results obtained were 1.00 from material experts, media experts, and prospective users, thus indicating the validity results are in the very high category, meaning MODISA is very appropriate, very useful, very interesting, and very feasible to use. In conclusion, MODISA (Sex Education Module for Teenagers) has the potential to improve adolescents' knowledge, attitudes, and behavior towards the risks of sexual behavior, so that it can be a structured teaching material for high school guidance and counseling teachers in providing sex education.
Copyright (c) 2026 Cindy Aprillia, Dian Purbo Utomo https://creativecommons.org/licenses/by-sa/4.0
Pengembangan Usaha Daur Ulang Plastik PP Berbasis Design Thinking untuk Mewujudkan Green Circular Economy
The increasing volume of plastic waste, particularly Polypropylene (PP), has become a significant environmental challenge in Indonesia while simultaneously creating economic opportunities through the development of plastic recycling businesses. Along with growing industrial awareness of environmentally friendly raw materials and sustainable waste management policies, demand for recycled plastic materials continues to increase. This study aims to formulate and analyze the feasibility of a business development plan for a Polypropylene (PP) plastic grinding enterprise operated by CV Yuki Marshall as a supplier of recycled plastic raw materials for manufacturing industries and downstream recycling companies. The research method employs a business feasibility study using a descriptive-analytical approach, covering market, operational, and financial aspects. Financial analysis is conducted through three-year cash flow projections under pessimistic, moderate, and optimistic scenarios, and investment feasibility is evaluated using Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period indicators. The results indicate that the Polypropylene plastic grinding business of CV Yuki Marshall has strong prospects and is feasible for further development. The feasibility is supported by stable market potential, efficient operational processes, and positive financial performance. In addition to generating economic benefits, this business also contributes to plastic waste reduction and supports sustainable environmental management.
Copyright (c) 2026 Neni Kartikasari, Yenny Maya Dora https://creativecommons.org/licenses/by-sa/4.0
Strategi Penyusunan Business Plan UMKM Tas Lipat Ramah Lingkungan Lipatto Berbasis Business Model Canvas dan Inovasi Hijau
This study explores the development strategy of Lipatto foldable bags using a design thinking approach to enhance product differentiation, competitiveness, and sustainability in the urban consumer market. The research aims to identify consumer needs, develop innovative product concepts, and assess the feasibility of integrating quality, aesthetics, eco-friendliness, and customization into a marketable product. Data were collected through structured observations, interviews, and market analysis in Bandung, followed by prototype development and consumer testing. The study employed Lean Canvas modeling to evaluate business feasibility and strategic positioning. Results indicate that consumers highly value multifunctional, durable, and aesthetically distinctive bags with eco-friendly materials and customizable features. The integration of design thinking stages empathize, define, ideate, prototype, and test enabled Lipatto to generate innovative solutions aligned with consumer expectations. Lean Canvas analysis demonstrated that the business model is viable, scalable, and adaptable for broader market segments. The findings provide practical implications for MSMEs in the creative industry seeking sustainable product innovation and strategic differentiation.
Copyright (c) 2026 Ilma Puspanusa, Meriza Hendri https://creativecommons.org/licenses/by-sa/4.0
Developing Official Website by using Advertising Language for UMKM Batik Garudeya Kidal
This study aimed to develop an official website using advertising language for UMKM Batik Garudeya Kidal. The research used the Design and Development Research (DDR) approach with the ADDIE model, which includes analysis, design, development, implementation, and evaluation stages. In the analysis stage, data were collected through observation and interviews, which showed that the UMKM still relied on social media and did not yet have an official website to present complete and structured information about its products. Based on these findings, the researcher developed a website using Wix as the platform. The website was designed to be simple, attractive, and easy to use. Advertising language was applied in the product descriptions to make the content more persuasive and appealing to potential customers. The website contains important information such as business profile, product catalog, pricing, and contact details. The website was then tested through expert validation and user responses. The results showed that the website is in the “very good” category and suitable for use as a promotional media. Field testing results also reached 94.8%, indicating that users found the website easy to use, informative, and visually appealing. Overall, the website is effective in helping UMKM Batik Garudeya Kidal improve its promotion, strengthen its branding, and reach a wider audience through digital media.
Copyright (c) 2026 Ririn Pratiwi Suharto, Putri Sekarsari https://creativecommons.org/licenses/by-sa/4.0
A Linguistic Landscape Study of Culinary Store Names on Jalan Soekarno-Hatta, Malang
Malang is known for its diverse culinary attractions, particularly along Jalan Soekarno-Hatta, a popular culinary area. The linguistic landscape (LL) displayed in public spaces reflects the sociolinguistic characteristics of a region and can be observed through culinary store names. This study aims to identify the monolingual and bilingual patterns used in culinary store naming on Jalan Soekarno-Hatta and to analyze their informational and symbolic functions. This research employed a descriptive qualitative method. Data were collected from permanent signage along Jalan Soekarno-Hatta. Of the 181 stores identified, 80 were culinary businesses. The findings reveal 70 monolingual store names categorized into six patterns: P+BN, BN, TCS+P, TCS+P+BN, TCS+BN, and P. In addition, 10 bilingual store names were classified into three patterns: TCS+BN, P+BN, and TCS+P. The study shows that the informational function of the linguistic landscape is to communicate products and store locations, while the symbolic function reflects business ownership and the regional identity of the cuisine offered. These findings demonstrate how culinary store names contribute to representing cultural and linguistic identities in urban public spaces.
Copyright (c) 2026 Putri Sekarsari, Ririn Pratiwi Suharto https://creativecommons.org/licenses/by-sa/4.0
Makna Toponim Desa Durungbedug Sebagai Representasi Warisan Budaya Lokal
This study aims to examine the meaning of toponyms in Durungbedug Village as a representation of local cultural heritage. Using a comparative historical linguistics approach, Barthes' etymology and semiotics, as well as ethnographic methods, this study explores the meaning of place names in the village. Scientific findings indicate that the toponyms of Durungbedug Village, consisting of Bedug Pesantren, Bedug Dowo, and Bedug Baru, reflect the existence of developing religious, agrarian, and economic values. "Bedug Pesantren" reflects religious traditions, "Bedug Dowo" indicates still-perpetuated agrarian practices, while "Bedug Baru" depicts economic dynamics that keep pace with the times. The contribution of this study is to provide a new understanding that toponyms are not only geographical markers, but also reflect social, cultural, and economic changes, as well as enriching the study of local cultural heritage.
Desain Inovasi Crossword Puzzle Digital Berbasis STEM Materi Pencernaan Manusia Untuk Meningkatkan Literasi Sains Siswa Kelas 5 Sekolah Dasar
This study aimed to develop a STEM-based digital crossword puzzle learning media, assess its validity and feasibility, and determine its effectiveness in enhancing scientific literacy among fifth-grade elementary school students studying the human digestive system. The research adopted the ADDIE development framework, encompassing the stages of Analysis, Design, Development, Implementation, and Evaluation. Validation and practicality assessments involved media experts, content experts, teachers, and students. Data were collected using structured questionnaires and analyzed descriptively. The results indicated that the developed media achieved a validity score of 94% from media experts and 98% from content experts, both categorized as highly valid. Teacher evaluations yielded a feasibility score of 96%, demonstrating excellent practicality. In addition, the N-Gain score of 0.97 obtained from student responses reflected a high level of improvement in scientific literacy. These findings suggest that the STEM-based digital crossword puzzle is a valid, practical, and effective learning medium for fostering scientific literacy in elementary school education.
Copyright (c) 2026 Mohamad Fatih https://creativecommons.org/licenses/by-sa/4.0
Rancang Bangun Mesin Pemotong Semi-Otomatis Untuk Elektroda Baterai Silinder
Semi-automatic cutting machines for battery electrodes are important tools in the development of the battery manufacturing industry, which aim to ensure precision and efficiency in the battery electrode cutting process. This research focuses on the design and construction of a machine capable of cutting cylindrical battery electrodes with high accuracy and good consistency. The machine consists of several main components such as an electric motor, pulleys, belts, shafts, cutting blades, hollow steel, steel plates, and bolts, which are systematically integrated to achieve optimal cutting results. The electric motor with a rotational speed of 1350 RPM serves as the main drive of the machine. This motor drives the pulley and belt to transmit power to the cutting blade, which is used to precisely cut the electrodes. A 20 mm diameter steel shaft was selected to connect the pulley and cutting blade, ensuring stable and efficient power transmission during operation. The research results show that this machine is capable of cutting a cylindrical battery electrode cutting with a width of 65 mm and a length of 950 mm in a single cut with a cutting time of 3 seconds. The machine's construction successfully cuts the electrode according to the specified specifications. Test results from four cuts indicate that the tool functions optimally and meets the standards.
Analisis Pengaruh Lebar Magnet Neodymium Pada Kinerja Permanent Magnet Synchronous Generator (Pmsg) 12 Slot 8 Pole Menggunakan Software Magnet Infolytica
Permanent Magnet Synchronous Generator (PMSG) with 12 slots 8 poles, using Magnet Infolytica software. The main focus of the research is to evaluate the impact of changes in the width of the permanent magnet (32 mm to 52 mm) on electromagnetic characteristics, such as current, voltage, torque, input power, output power, and energy conversion efficiency. Simulations were carried out at a rotational speed of 750 rpm with a resistive load of 70 Ohm. The results showed that increasing the width of the permanent magnet had a positive impact on the performance of the PMSG, the best generator at a variation of the magnet width of 44 mm which had an efficiency of 88.6% with a current of 8.9 A, a voltage of 565.97 V, a torque of -66.08 N/m, an input power of 5189.79 Watts, and finally an output power of 4598.67 Watts. These findings are expected to be a reference in designing an optimal PMSG for small to medium-scale renewable energy power generation applications, especially in Wind Power Generation (PLTB) systems.
Analisis Kualitas Air Sungai Kendilo Berdasarkan Metode Indeks Pencemaran
The Kendilo River is an important water source in Paser Regency, used for domestic, agricultural, industrial, and raw water needs. The Kendilo River experiences pressure from anthropogenic activities that cause pollution. This study aims to analyze the quality status and trends of the Kendilo River's water quality for the period 2019-2024. The method used is quantitative descriptive with secondary data from water quality monitoring from nine monitoring points representing the upstream, middle, and downstream segments of the river. The assessment of water quality status was carried out using the Pollution Index based on Class II water quality standards in accordance with Government Regulation Number 22 of 2021. The variables analyzed were pH, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, total suspended solids, total dissolved solids, ammonia, nitrate, total phosphate, and fecal coliform. The results showed that the water quality status of the Kendilo River was generally classified as lightly polluted. The pollution index value increased in the period 2019-2021, then showed an improving trend until 2024, although not evenly distributed across all monitoring points. Total suspended solids were the most dominant and consistent primary pollutant. Furthermore, increases in organic load were indicated by biochemical oxygen demand, chemical oxygen demand, and total phosphate. The study's conclusions underscore the need for integrated and sustainable water quality management of the Kendilo River to prevent further degradation and maintain the river's function for the environment and community.
Desain Alat Bantu Khusus Untuk Proses Pengangkatan dan Pemindahan CNC HAAS V-F1
The relocation of the Haas V-F1 CNC machine in a vocational education environment requires a special lifting tool that is safe, precise, and suitable for the limitations of campus facilities. This study aims to design and validate a special lifting tool that is compatible with the characteristics of the 3,539 kg Haas V-F1 CNC machine at the Morowali Metal Industry Polytechnic. The research method used an engineering design approach that included collecting technical data on the machine, structural static calculations, CAD modeling, and strength validation through finite element analysis (FEA). The analysis results show that at a nominal load of 34,682 N, the lifting tool has a maximum Von Mises stress of 1.49 × 10⁸ N/m², a maximum deflection of 3.63 mm, and a safety factor (FoS) of 2.4, which indicates safe operating conditions and is well below the yield strength of structural steel. Gradual loading tests show that the structure still works elastically up to an additional load of 500 kg with a FoS of 1.3, but reaches a critical condition at an additional load of 650 kg with a FoS approaching 1.0. Thus, the lifting device is recommended to operate at a nominal load with a maximum additional load of 250 kg. This research resulted in a safe, practical, and feasible lifting device design that can be used as an operational standard for lifting CNC machines in vocational education environments.
Analisis Biaya Pekerjaan Jalan Lentur di Kampus Polinela dengan AHSP Bina Marga 2025
Politeknik Negeri Lampung (POLINELA) covers a total area of 29.41 hectares, with functional buildings distributed across the campus. This spatial distribution necessitates the use of vehicles for inter-building mobility. Consequently, high-quality internal road infrastructure is critical to ensuring efficient travel times and distances, supporting both academic and operational activities. This study aims to analyze the estimated cost of implementing flexible pavement construction on the internal road network of the POLINELA campus. The analysis was conducted by developing a cost estimate (RAB) based on the 2025 Analysis of Work Unit Prices (AHSP) issued by the Directorate General of Bina Marga. The unit price standards were referenced from the 2025 Price Schedule of Bandar Lampung City. The research methodology involved calculating work volumes, determining the AHSP, and summarizing the total project cost. The scope of work includes mobilization, land surveying (stake-out), common excavation, embankment, subgrade preparation, Aggregate Base Class A and Class B, prime coat, tack coat, and Asphalt Concrete-Wearing Course (AC-WC) surfacing. The calculation results indicate that the total estimated cost for the flexible pavement construction at the POLINELA campus is Rp4,472,800,000.00 (four billion four hundred seventy-two million eight hundred thousand rupiahs).
Kajian Penentuan Lokasi Pipa Resapan Horisontal Guna Mitigasi Banjir dan Kekeringan di Kab. Semarang
Population growth, land-use conversion, and the reduction of vegetation cover have led to increasingly frequent floods and droughts in Semarang Regency. These conditions exacerbate surface runoff and reduce the soil’s capacity to store water, resulting in inundation during the rainy season and drought during the dry season. The objective of this study is to determine the location for installing Horizontal Recharge Pipes (HRP), which play an important role, particularly in flood-prone areas, by enhancing groundwater infiltration as a water reserve. The method applied in this research involves calculating the magnitude of runoff discharge in areas with potential flood inundation, which is then simulated with the application of HRP installation to determine the number of HRPs required to reduce flooding. Drought-prone areas were analyzed using satellite imagery to identify suitable HRP locations. In the Klegung watershed, 10 HRP units are required; in the Curug watershed, 460 units; and in the Lodong watershed, 835 units, all using a 12-inch diameter. Drought analysis using Landsat imagery identified dry areas in East Ungaran, Susukan, Suruh, Bancak, and Pringapus subdistricts. The installation points for HRPs can be prioritized based on areas experiencing inundation or drought. The implementation of HRPs is expected to infiltrate surface runoff effectively, thereby reducing flood risk while simultaneously increasing groundwater availability in Semarang Regency.
Identifikasi Waste pada Proyek Jalan Tol Kayu Agung-Palembang Betung dengan Menggunakan Lean Construction
Development in Indonesia continues to increase in line with growing community needs. In South Sumatra Province, one of the projects currently underway is the Kayu Agung – Palembang – Betung Toll Road. This study is expected to contribute to the development of Lean Construction methodology in Indonesia and provide practical recommendations for other infrastructure projects. The application of Lean principles in this project has significant potential to reduce waste and improve efficiency. The results of the study show that out of eight categories of waste, seven types of waste were identified. The two most dominant were Defects (24.14%) and Waiting (20.69%). The dominance of Defects indicates weaknesses in quality control, which leads to rework, cost overruns, and reduced resource efficiency. Meanwhile, the high level of Waiting illustrates a lack of synchronization in the workflow due to delays in material supply, ineffective coordination, and slow decision-making. The combination of these two factors has a direct impact on decreased productivity, schedule delays, and increased budgets. Therefore, this study emphasizes the need for stricter quality control and time management strategies through the application of Lean Construction principles.
Copyright (c) 2026 Tri Hartono, Mohd. Isneini, Masdar Helmi, C. Niken DWSBU, Vera Agustriana Noorhidana https://creativecommons.org/licenses/by-sa/4.0