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Nucleus Journal
Published by Universitas Darul Ulum
ISSN : 29644097     EISSN : 29644100     DOI : 10.32492/nucleus
Core Subject :
Nucleus Journal: Jurnal Sains dan Teknologi is a peer-reviewed journal published by Universitas Darul Ulum. Nucleus Journal is published twice a year, in May and November. Nucleus Journal is a publication of research results of Students, Lecturers and Practitioners in the field of Science and Technology. Fields of study include; Electrical Engineering, Industrial Engineering, Informatics Engineering, Civil Engineering, Chemical Engineering, Agricultural Sciences, Architecture, Engineering Education, And Other Engineering Fields. e-ISSN: 2964-4100 p-ISSN: 2964-4097
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Articles 63 Documents
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Studi Analisis Gedung 7 Lantai Menggunakan Program ETABS Sari Utama Dewi; Samudra Arrazakia
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5104

Abstract

The construction of multi-story buildings requires structural designs that ensure safety, strength, and adequate structural performance under various loading conditions. This study aimed to analyze and design reinforced concrete beam elements in a seven-story building using structural analysis software. The object of the study was the Civil Engineering Department building of the Faculty of Engineering at the University of Lampung. Structural analysis was carried out through three-dimensional modeling to evaluate the structural response under load combinations consisting of dead loads, live loads, wind loads, and earthquake loads. The analysis produced internal force responses, including bending moments, shear forces, and torsional forces acting on the beam elements. These results were used to determine appropriate beam dimensions and reinforcement requirements in order to satisfy structural strength and stability criteria. The findings indicated that the designed beam dimensions and reinforcement configurations were capable of resisting the applied load combinations with structural deformations remaining within acceptable limits. Furthermore, the evaluation of structural capacity confirmed that the beam design satisfied the required safety and performance criteria. Therefore, the reinforced concrete beam design for the seven-story building was considered structurally safe and suitable for implementation in multi-story building structural planning.
Turning Waste into Value: Biodecomposition of Oil Palm Trunk Biomass for Sustainable Compost Fertilizer Production Nina Veronika; Sri Wahyuni; Nur Asma Deli; Hayatul Khairul Rahmat; Barokat Mamah
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5101

Abstract

The rapid expansion of the oil palm industry has generated substantial biomass waste, particularly from oil palm trunks during replanting activities. Improper management of this waste can cause environmental problems, while its high lignocellulosic content offers potential for conversion into organic fertilizer. This study aimed to evaluate the feasibility of utilizing oil palm trunk waste as compost through a biodecomposition process. The compost was produced using a mixture of oil palm trunk biomass and organic additives, followed by physicochemical analysis to assess compost quality. The results showed that the compost contained C-organic levels ranging from 46.3% to 52.1%, C/N ratios between 20.2 and 21.9, pH values of 7.58–8.00, and total macronutrient content (N + P₂O₅ + K₂O) of 7.03–8.74%. All parameters met the quality standards for solid organic fertilizers according to SNI No. 7763: 2024. These findings indicate that oil palm trunk compost has good maturity and nutrient content, making it suitable for improving soil fertility and supporting sustainable oil palm replanting. The study highlights the potential of converting oil palm trunk waste into value-added organic fertilizer as part of a sustainable waste management strategy.
Pemetaan Kerentanan dan Peramalan Kekeringan Meteorologis di DAS Blega Menggunakan Indeks China-Z Multiskala dan Model SARIMA Nur Azizah Affandy; Dimas Prayoga Prayoga; Rio Rahma Dhana; Data Iranata
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5106

Abstract

Meteorological drought is one of the hydrometeorological phenomena that frequently occurs and has the potential to cause serious impacts on water availability, agricultural activities, and the sustainability of community livelihoods. This condition requires a deeper understanding of drought patterns as well as the capability to anticipate the likelihood of future drought events. This study aims to analyze the spatio-temporal dynamics of meteorological drought in the Blega Watershed using the China-Z Index (CZI) at multiple time scales, namely CZI-1, CZI-3, CZI-6, CZI-12, and CZI-24, while also mapping areas vulnerable to drought. In addition, this study develops drought forecasting using the Autoregressive Integrated Moving Average (ARIMA) model to estimate future drought trends. The results indicate that the CZI is capable of capturing fluctuations in drought conditions from wet to dry categories across different time scales and identifying areas with varying levels of drought vulnerability within the Blega Watershed. Time series modeling shows that the SARIMA (0,0,0)(1,0,1)12 model provides the best predictive performance, with a Mean Absolute Error (MAE) value of 0.599, indicating that the model is reasonably accurate in representing drought dynamics. These findings suggest that drought patterns in the study area are influenced by annual seasonal variations closely related to rainfall distribution. Therefore, this study not only provides a scientific overview of meteorological drought characteristics in the Blega Watershed but also offers valuable information for drought mitigation planning, water resource management, and more responsive policy-making toward climate variability.
Peningkatan Kreativitas Siswa Dalam Pembuatan Media Pembelajaran Interaktif CSS JavaScript Melalui Make a Match Titik Dian Darmayanti; Syaad Pathmantara; Mahali Mahali
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5107

Abstract

This research is entitled: " Improving Student Creativity in Creating Interactive CSS JavaScript Learning Media Through Make a Match ". The purpose of this study is to enhance students' creativity in developing interactive learning media using CSS and JavaScript by implementing the Make A Match cooperative learning technique in the Software and Game Development subject for class X-PPLG 2 at SMK Negeri 5 Malang. The research method employed is classroom action research comprising three cycles, each involving Planning, Implementation, Observation, and Reflection. The findings indicate that the use of the Make A Match cooperative learning method has been effective in improving various aspects of student learning, including creativity, motivation, active participation, presentation skills, and discipline. The consistent improvement in grades also suggests that this method can sustain students' interest and engagement in the learning process, thereby positively impacting their learning outcomes. Furthermore, the study recommends that teachers facing similar challenges consider implementing the Make A Match cooperative learning method to enhance student creativity. Additionally, teachers are encouraged to design learning materials in a more creative and innovative manner to maximize the benefits of Make A Match Cooperative Learning.
Penerapan Ekonomi Sirkular dalam Inovasi Material Konstruksi: Bambu sebagai Substitusi Plat Beton Bertulang A'izzatul Khiyana; Meriana Wahyu Nugroho; Totok Yulianto; Titin Sundari; Rahma Ramadhani; Sulung Rahmawan Wira Ghani; Ita Suhermin Ingsih
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5108

Abstract

Industri konstruksi menghadapi tantangan keberlanjutan akibat tingginya konsumsi sumber daya dan emisi karbon, sehingga diperlukan penerapan prinsip ekonomi sirkular untuk meminimalkan dampak lingkungan. Dalam kondisi ini, bambu sebagai material lokal dengan siklus tumbuh cepat dan kemampuan regenerasi tinggi berpotensi menjadi alternatif berkelanjutan yang mendukung transformasi konstruksi ramah lingkungan. Penelitian ini bertujuan untuk menguji pemanfaatan bambu sebagai material substitusi tulangan pada plat beton dengan menekankan aspek keberlanjutan dan menganalisis komparatif biaya dalam pemanfaatan bambu dan tulangan baja. Analisis dimulai dengan melakukan studi literatur terkait penerapan ekonomi sirkular dalam penggunaan bambu, melakukan eksperimen dengan membuat benda uji plat substitusi tulangan bambu dan menguji kuat lenturnya, serta menghitung perbedaan biaya penggunaan bambu dan baja sebagai tulangan pada plat beton. Hasil kajian menunjukkan bahwa bambu memiliki kekuatan tarik yang sebanding dengan baja konvensional, dengan keunggulan tambahan berupa ketersediaan melimpah, biaya relatif rendah, dan jejak karbon yang relatif rendah. Implementasi bambu dalam konstruksi tidak hanya berkontribusi pada pengurangan emisi karbon, tetapi juga membuka peluang pengembangan rantai pasok material lokal yang lebih berkelanjutan. Dengan demikian, integrasi bambu sebagai substitusi plat beton bertulang dalam perspektif ekonomi sirkular dapat menjadi solusi inovatif menuju pembangunan infrastruktur hijau yang ramah lingkungan dan efisien sumber daya.
Perancangan dan Pengujian PLTS Off-Grid Portabel Berbasis IoT untuk Aplikasi Darurat Infrastruktur Transportasi Budi Triyono; Dimas Nur Prakoso; Yuli Prasetyo; Basuki Winarno; Ryan Wicaksono; Santi Triwijaya; Satrio Nugroho
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5109

Abstract

Ketersediaan catu daya yang andal pada infrastruktur transportasi sangat penting untuk menjaga keselamatan, ketertiban, dan kontinambungan layanan, khususnya pada kondisi darurat ketika pasokan listrik dari jaringan terganggu. Penelitian ini bertujuan merancang dan menguji sistem Pembangkit Listrik Tenaga Surya (PLTS) off-grid portabel berbasis Internet of Things (IoT) sebagai sumber daya darurat untuk infrastruktur transportasi berkelanjutan. Metode penelitian menggunakan pendekatan rekayasa sistem yang meliputi studi literatur, perancangan perangkat keras, integrasi sistem monitoring IoT, perakitan prototipe, serta pengujian laboratorium dan lapangan. Sistem yang dikembangkan terdiri atas tiga panel surya dengan total kapasitas 300 Wp, baterai lithium 12 V 100 Ah, solar charge controller PWM 20 A, inverter 1000 W, serta dashboard monitoring berbasis Ubidots. Hasil pengujian menunjukkan bahwa tegangan keluaran panel surya berada pada rentang 19,5–20,5 V dengan daya tertinggi mencapai 89,3 W pada pukul 11.00. Tegangan keluaran solar charge controller relatif stabil pada rentang 13,37–13,43 Vdc selama proses pengisian. Pada pengujian baterai saat pelepasan beban, tegangan menurun dari 13,46 Vdc menjadi 13,37 Vdc, diikuti penurunan tegangan AC inverter dari 205 Vac menjadi 198 Vac. Sistem IoT berhasil menampilkan parameter kelistrikan secara real-time, meliputi tegangan, arus, daya, status charging-discharging, dan state of charge baterai. Hasil penelitian menunjukkan bahwa sistem yang dikembangkan layak digunakan sebagai solusi catu daya darurat yang portabel, efisien, dan mudah dipantau
Mango Leaf Detection: Comparison of YOLOv12n and YOLOv26n for Mangifera indica Disease Hari Atmojo Setiyo; Lilik Anifah
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5103

Abstract

This study addresses the inaccurate detection of mango (Mangifera indica) leaf diseases, which can reduce plant productivity. A deep-learning-based automatic detection system is proposed to identify five leaf diseases (Mangifera indica): anthracnose, cutting weevil, dieback, powdery mildew, and sooty mold. This study compares two object detection models, namely YOLOv12n and YOLOv26n, with a dataset of 1,970 images. The data is annotated and divided into training, validation, and testing with weights of 70%, 20%, and 10%, respectively. Both YOLO models were trained for 100 epochs and evaluated using accuracy, precision, recall, and F1 score. The results of this study indicate that YOLOv26n performs better during testing, with an average accuracy of 97,06%, a recall of 98,76%, a precision of 98,25%, and an F1 score of 98,50%. In comparison, YOLOv12n achieved 94,52% accuracy, 98,92% recall, 95,47% precision, and 97,16% F1 score. Although YOLOv12n had slightly better training loss, YOLOv26n delivered more consistent performance, particularly in mean average precision (mAP) at higher thresholds. Therefore, YOLOv26n is better at identifying mango leaf diseases and has greater potential for real-time agricultural applications.
Optimalisasi Auto Dosing Cement Additive Berbasis PLC-SCADA dengan Kendali Closed-Loop pada Finish Mill Affan Bachri; Moch Syafi Uddin; Eko Wahyu Santoso; Abd Kadir Mahamad
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5110

Abstract

PLC is a programmable logic control system that uses a microprocessor as the main controller and is widely applied in industrial automation processes such as monitoring and controlling production machinery. The system is equipped with input and output devices that interact with external components such as buttons, sensors, actuators, and other hardware devices. This technology has been implemented in various fields, including cement production processes. In this study, the programmable logic controller was used to modify the auto dosing system for cement additive with the aim of improving dosing accuracy, enabling real-time monitoring, and developing an auto dosing system capable of adapting to changes in feed material. The previous system operated manually and relied heavily on operator intervention, resulting in inconsistent dosing performance. To overcome these limitations, a programmable logic controller-based control system integrated with a supervisory control and data acquisition system was implemented. The system applied a closed-loop control method to regulate the dosing process in order to achieve stable and consistent output. System performance was evaluated by comparing the accuracy and stability of the flow rate before and after modification. The analysis results showed that the proposed system reduced the error between the setpoint and the actual flowmeter reading from 16% to 3%, decreased flow fluctuations, and improved process stability. In addition, the system enabled centralized monitoring and reduced operator dependency, thereby improving operational efficiency.
Analysis of Problems and Solutions in Stakeholder Management in Digital Technology-Based Sustainable Construction Projects Irika Widiasanti; Muhammad Rizki Rifandi; Mushab Hifzhul Haq; Keny Islam Nur Esa
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5112

Abstract

Stakeholder management in modern sustainable construction projects faces significant complexity due to the diversity of priorities and barriers to the adoption of digital technology. A review of the literature indicates that there remains a significant gap regarding disagreements in decision-making, poor coordination between parties, and the sub-optimal use of technology at the project governance level. To address these issues, this research aims to formulate a comprehensive framework based on PMBOK 10 that integrates Multi-Criteria Decision Making (MCDM) with cutting-edge technologies (such as AI, blockchain, and fuzzy logic). This framework is designed to facilitate collaborative governance and enhance the effectiveness of aligning various interests throughout the project lifecycle. The research method uses a descriptive analysis approach to three main problem categories including stakeholder disagreements, digital technology evaluation, and stakeholder relationships. The research results identified nine specific problems with solutions based on Multi-Criteria Decision Making (MCDM), digital technology (AI, big data, blockchain), collaborative governance, and interactive stakeholder mapping systems. The discussion shows the importance of technology integration, human resource capacity building, communication transparency, and structured coordination mechanisms. The research conclusion confirms that effective stakeholder management requires a holistic approach that combines digital technology, participatory collaboration, and adaptive monitoring systems to improve the sustainability performance of infrastructure projects.
Casement Windows With and Without Screens: CFD Study on Lighting, Thermal, and Malaria Cornelia Hildegardis
Nucleus Journal Vol. 5 No. 1 (2026): May
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/nucleus.v5i1.5111A

Abstract

Despite growing evidence linking housing design to malaria transmission in sub-Saharan Africa, quantitative CFD-based evidence on window screen effects within the Indonesian context remains scarce, particularly in endemic districts such as Sikka Regency. This study evaluates the effect of casement windows with and without mosquito screens on natural lighting performance and thermal conditions in dwellings, and assesses the potential implications for indoor microclimate conditions relevant to malaria vector activity. A case study of a PUPR model house in Sikka Regency was conducted using direct field measurements and Computational Fluid Dynamics (CFD) simulations to analyze airflow, temperature, and humidity distributions under two window scenarios. Results showed that screened windows reduced average natural lighting from 96 lux to 87 lux and increased indoor relative humidity by 13.51% (up to 68.03%) compared to unscreened windows. Unscreened windows produced more effective cross ventilation, more stable indoor temperatures, and lower humidity—conditions less conducive to mosquito persistence. Conversely, screened windows restricted airflow, triggered stagnant air zones, raised local temperatures, and increased humidity, conditions that may increase the likelihood of mosquito persistence or presence indoors. These findings suggest that passive window design decisions carry significant implications for indoor microclimate quality in malaria-endemic tropical dwellings, and should be integrated into healthy housing design guidelines for endemic regions.

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