Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 21-40 of 11448
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Rancang Bangun Dan Kalibrasi Timbangan Digital Menggunakan Modul Hx711 Berbasis Arduino Uno Dengan Tambahan Buzzer
(Universitas Sumatera Utara, 2025)This study describes the process of designing and calibrating a digital scale using the HX711 module based on Arduino Uno with the addition of a buzzer as a notification feature. The system is designed to measure load mass ... -
Pembuatan 2-Etilheksil Laurat dari Esterifikasi Asam laurat dan 2-Etilheksanol Pada Perbandingan Rasio Mol dan Berat Enzim Lipase Menggunakan Radiasi Mikrowave
(Universitas Sumatera Utara, 2025)The production 2-Ethylhexyl Laurate from esterification reaction of Lauric acid with 2-ethylhexanol with lipase enzyme as catalyst under microwave irradiation has been conducted. The parameters studied in this study were ... -
Sistem Pemutus Tegangan pada Stasiun Pengisian Daya Baterai Laptop dengan Tenaga Surya Berbasis Sensor Ina219
(Universitas Sumatera Utara, 2025)This research aimed to design and implement an automatic voltage cutoff system and an RFID-based smart lock for a solar-powered laptop charging station. The system was designed to address two main issues: the risk of ... -
Analisis Logam Tembaga (Cu) dan Seng (Zn) pada Bubuk Kopi (Coffea spp.) dari Home Industri di Kecamatan Melati Diski
(Universitas Sumatera Utara, 2025)This study aims to analyze the levels of copper (Cu) and zinc (Zn) in coffee powder (Coffea spp.) produced by home industries in Melati Diski District, North Sumatra. The samples were analyzed using the dry destruction ... -
Pemanfaatan Ekstrak Etanol Daun Kemuning (Murraya paniculata L. Jack) pada Sediaan Masker Gel
(Universitas Sumatera Utara, 2025)The kemuning (Murraya paniculata L. Jack) plant grows wild in shrubs, forest edges, or is planted as an ornamental plant and hedge plant. Yellow leaves are known for their traditional benefits for smoothing the skin. ... -
LoA Manuscript Acceptance Trends In Sciences On Behalf of Widya Sonita Gultom
(Trends In Sciences, 2025) -
Sintesis Poliol melalui Reaksi Epoksidasi dan Hidroksilasi Minyak Goreng Bekas pada Variasi Waktu Reaksi dan Kecератаn Pengadukan Menggunakan Homoginezer
(Universitas Sumatera Utara, 2025)Synthesis of polyol compounds from used cooking oil has been carried out through two reaction stages, namely epoxidation and hydroxylation. These polyol compounds have the potential as intermediates or precursors for the ... -
LoA Manuscript Acceptance International Journal of Agriculture and Biology (IJAB) On Behalf of Ingrid Sihombing
(International Journal Of Agriculture & Biology, 2025) -
Analisis Kadar Logam Kadmium (Cd) pada Kubis Putih (Brassica Oleracea L.) Menggunakan Metode Destruksi Basah Secara Spektroskopi Serapan Atom (SSA)
(Universitas Sumatera Utara, 2025)Farmers in Namorambe District, Deli Serdang Regency, are still heavily dependent on the intensive use of inorganic fertilizers in their cultivation practices, including for white cabbage (Brassica oleracea L.). Excessive ... -
MODEL OPTIMASI MULTI-OBJEKTIF UNTUK JARINGAN RANTAI PASOK BERKELANJUTAN
(Universitas Sumatera Utara, 2025)Sustainable supply chains have become a strategic approach in addressing global challenges related to operational efficiency and environmental and social sus tainability. This research aims to design a multi-objective ... -
Penerapan Metode Geographically Weighted Random Forest Regression pada Kasus Tuberkulosis di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)Geographically Weighted Random Forest Regression (GWRFR) is an improved method of Random Forest (RF) that considers spatial effects. Spatial effects refer to variations in the relationship between variables across different ... -
Penerapan Metode Adams Bashforth-Moulton dan Runge-Kutta dalam Memprediksi Pertumbuhan Penduduk di Sumatera Utara pada Tahun 2029 Berdasarkan Data Jumlah Penduduk pada Tahun 2015-2024
(Universitas Sumatera Utara, 2025)The ABM5 method is a predictor and corrector (multistep) method in solving non-linear ordinary differential equations that utilizes the value of several previous periods to calculate the current value and future values, ... -
Penggunaan Metode Naive Bayes pada Klasifikasi Risiko Angka Putus Sekolah di Sumatera Utara
(Universitas Sumatera Utara, 2025)The school dropout rate is a crucial indicator for assessing the quality and equity of education in a region. A high dropout rate often reflects structural issues such as poverty, limited access to educational facilities, ... -
Perbandingan Algoritma Branch and Bound dan Simulated Annealing pada Travelling Salesman Problem
(Universitas Sumatera Utara, 2024)This study aims to explain and solve the problem of determining the route that has the minimum distance or cost in the Traveling Salesman Problem (TSP). To overcome this, an approach using the Branch and Bound Algorithm ... -
Sistem Monitoring Thermoelectric Sp1848 dengan Fan Cooling
(Universitas Sumatera Utara, 2025)The utilization of waste heat from furnaces had not been optimized, even though it could be converted into electricity by using a Thermoelectric Generator (TEG). This research aimed to design and test a TEG system based ... -
Analisis Pupuk Tabur Dengan Variasi Penambahan Asam Humat Terhadap Pertumbuhan Sawi Hijau (Brassica juncea L.)
(Universitas Sumatera Utara, 2025)Research on the analysis of the effect of varying humic acid additions to granular fertilizer on the growth of mustard greens (Brassica juncea L.) was conducted with the objectives of (1) analyzing the effect of humic acid ... -
Analisis Sensitivitas Pada Model DEA Dengan Pendekatan Fuzzy Pada Pengukuran Kinerja Lingkungan Perumahan
(Universitas Sumatera Utara, 2025)Sensitivity analysis in DEA models using a fuzzy approach can provide significant benefits in measuring the environmental performance of housing. This method can help identify and measure the impact of changes in input ... -
Penerapan Metode Fuzzy Analytical Hierarchy Process (AHP) dalam Pemilihan Paket Layanan Internet Prabayar (Studi Kasus Mahasiswa FMIPA USU)
(Universitas Sumatera Utara, 2025)This research aims to measure the level of accuracy and effectiveness of the application of the Fuzzy Analytical Hierarchy Process (AHP) method in selecting internet service packages. The selection of internet service ... -
Vehicle Routing Problem Relaxed Time Windows
(Universitas Sumatera Utara, 2025)The Vehicle Routing Problem with Relaxed Time Windows (VRP-RTW) is an ex tension of the classic Vehicle Routing Problem (VRP) that allows for flexibility in service time windows. In VRP-RTW, vehicles are allowed to arrive ... -
Model Optimasi Distribusi Logistik Menggunakan Multi-Depot Capacitated Vehicle Routing Problem
(Universitas Sumatera Utara, 2025)Logistics distribution is vital for enhancing the efficiency and competitiveness of Indonesia. The challenges in Indonesian logistics include complex geography, limited infrastructure, traffic congestion, and high ...