Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 61-80 of 11447
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Pengaruh Intrusi Air Laut Terhadap Karakteristik Air Sumur Bor dan Konvensional di Desa Dusun 1 Pantai Cermin Kiri Sumatera Utara
(Universitas Sumatera Utara, 2025)The availability of clean water in coastal areas is a critical issue that is increasingly complicated by seawater intrusion. This study aims to analyze the impact of seawater intrusion on the physical and chemical ... -
Sistem Pengisian Otomatis dan Pemantauan Stok Tangki Air Menggunakan Sensor JSN-SR04T dan Sensor Water Flow YF-S201 Berbasis Internet of Things
(Universitas Sumatera Utara, 2025)A stable supply of clean water is essential, especially for industrial sectors such as drinking water depots. This study aimed to develop an automatic water refilling and tank stock monitoring system using Internet of ... -
Potensi Bacillus thuringiensis dari Tanah Kebun Kelapa Sawit di Kabupaten Batubara sebagai Agen Pengendalian Larva Nyamuk
(Universitas Sumatera Utara, 2025)The increasing resistance of Aedes aegypti and Culex sp. mosquitoes to chemical insecticides necessitates the search for environmentally friendly alternatives. This study evaluated the toxicological potential of Bacillus ... -
Potensi Bakteri Tanah Kawasan Terminal dalam Mendegradasi Oli Bekas
(Universitas Sumatera Utara, 2025)Environmental pollution caused by used oil is a serious problem due to its toxic hydrocarbon content, which is difficult to break down naturally. This study aims to examine the potential of bacteria isolated from the ... -
Potensi Jamur Endofit Penghasil Enzim Lakase dari Daun Kelapa Sawit (Elaeis guineensis Jacq.)
(Universitas Sumatera Utara, 2025)Oil palm leaves as habitat for various endophytic fungi that have the potential to produce hydrolytic enzymes, including lignin-degrading laccase enzymes. This study aimed to determine the potential of endophytic fungi ... -
Aplikasi Load Cell 200 Kg Untuk Sistem Kontrol Pengisian Air Otomatis Pada Depot Air Galon Isi Ulang Dengan Mikrokontroler Atmega328
(Universitas Sumatera Utara, 2025)This study presents the design and evaluation of an automatic water-filling control system specifically developed for refill-water depots in Indonesia. The system addresses the persistent issue of volume inconsistency that ... -
Sistem Pengontrolan Peralatan Listrik Pada Pemberian Pakan Ayam Berbasis Iot (Internet Of Things) Menggunakan Nodemcu Esp8266
(Universitas Sumatera Utara, 2025)The demand for efficiency and accuracy in poultry farm management necessitates the implementation of automation-based technologies. This research focuses on the design and implementation of an Internet of Things (IoT)-based ... -
Korelasi Indeks Shannon-Wiener Tumbuhan Pakan dengan Encounter Rate Burung Merbah Cerucuk (Pycnonotus goiavier) di Area Kampus Universitas Sumatera Utara
(Universitas Sumatera Utara, 2025)The Yellow-vented Bulbul (Pycnonotus goiavier) is a bird that feed fruit (frugivorous) and nectar (nectarivorous). The presence of the bird depends on the availability of the plants in its habitat. The diversity of ... -
Sistem Pengukuran dan Monitoring Pemakaian daya Listrik Peralatan rumah tangga Menggunakan Microkontroler ESP8266 Berbasis IoT (Internet of Things)
(Universitas Sumatera Utara, 2025)Real-time monitoring of electrical energy consumption is a crucial step in promoting energy efficiency in household environments. This study aims to design and develop a system for measuring and monitoring the power usage ... -
Perancangan Sistem Catu Daya Bertegangan Rendah Arus Besar Menggunakan MOT (Microwave Oven Transformers) pada Aplikasi Spot Welding
(Universitas Sumatera Utara, 2025)This study aims to design and develop a high-current, low-voltage power supply system using a modified Microwave Oven Transformer (MOT) for spot welding applications. The system was designed by modifying the secondary ... -
Karakteristik Elektroda Termodifikasi Kitosan/GQDs/MnO2 dalam Mengukur Kolesterol dengan Metode Voltametri Siklik
(Universitas Sumatera Utara, 2025)Chitosan/graphene quantum dots (GQDs)/manganese dioxide (MnO₂) modified electrode was successfully employed for cholesterol measurement using the cyclic voltammetry method. The incorporation of MnO₂ was proven to enhance ... -
Simulasi Optimasi Daya pada Panel Surya dengan Maksimum Power Point Tracking (MPPT) Menggunakan Algoritma Perturb and Observe dengan Matlab Simulink
(Universitas Sumatera Utara, 2025)This project focuses on the design, implementation, and performance evaluation of a solar power system equipped with a Maximum Power Point Tracking (MPPT) controller based on the Perturb and Observe (P&O) algorithm. A boost ... -
Sensitivitas dan Limit Deteksi Elektroda Termodifikasi Kitosan/GQDs/Fe3O4 dalam Mengukur Konsentrasi Kolesterol Menggunakan Metode Voltametri Siklik
(Universitas Sumatera Utara, 2025)In this research, the chitosan/GQDs/Fe3O4 modified electrode has been successfully carried out in measuring cholesterol using the cyclic voltammetry method. The chitosan/GQDs/Fe3O4 modified electrode was fabricated ... -
Algoritma Genetika Hibrid pada Permasalahan Optimasi Portofolio Dinamis
(Universitas Sumatera Utara, 2025)Dynamic portfolio optimization is a crucial problem in evolving financial markets, requiring investment decisions to be adjusted over time. Traditional methods such as Linear Programming (LP) and Quadratic Programming ... -
Prediksi Kebutuhan Energi Listrik Kota Medan Menggunakan Metode Jaringan Syaraf Tiruan Model Algoritma Backpropogation
(Universitas Sumatera Utara, 2025)This study aimed to predict the electrical energy demand at PT PLN (Persero) UP3 Medan for the next two years using the Artificial Neural Network (ANN) with the Backpropagation model. The purpose was to assist the company ... -
Perpindahan panas pada Fluida Non-Newton
(Universitas Sumatera Utara, 2021)Non-Newtonian fluids exhibit behaviour deviating from Newton’s law. In Sisko fluid flow, which is a non-Newtonian fluid, within pipes, the relationship between shear stress magnitude and shear strain becomes linear as ... -
Teori Permainan Fuzzy dalam Menentukan Strategi Pemasaran Optimum pada Shopee, Lazada dan Tokopedia
(Universitas Sumatera Utara, 2025)The rapid advancement of the times has resulted in every human activity being inseparable from technology. Various new technologies are emerging in every field of life. One of the rapidly developing technologies is electronic ... -
Variasi Komposisi Serat Pelepah Aren (Arena pinnata) dan Serbuk Kayu Mahoni (Swietenia macrophylla) sebagai Papan Komposit dengan Perekat Polyester
(Universitas Sumatera Utara, 2025)A study was conducted on the variation of sugar palm frond fibers (Arenga pinnata) and mahogany wood powder (Swietenia macrophylla) as composite boards using polyester, adhesive with dimensions of 7,5cm × ... -
Rancangan Charging Station untuk Laptop Berbasis Tenaga Surya dengan Monitoring Tegangan, Arus, dan Daya
(2025)This research aimed to design and develop a solar-powered laptop charging station equipped with a real-time voltage, current, and power monitoring system. The system used solar panels as the main energy source, with the ... -
Sistem Pemantauan Getaran Bebas pada Bilah Turbin Angin Menggunakan Sensor Akselerometer Mikro-Elektro-Mechanical Systems Berbasis Internet of Things
(Universitas Sumatera Utara, 2025)Vibration monitoring of wind turbine blades is critical for detecting structural damage that affects system performance and stability. This study developed a real-time vibration monitoring system using an ADXL345 MEMS ...