Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 121-140 of 11412
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Sistem Monitoring dan Pengontrolan Baterai Jarak Jauh (Iot) untuk Mencegah Overdrain Berbasis Atmega 328
(Universitas Sumatera Utara, 2025)Overdrain in batteries is a common issue that can lead to permanent damage, especially when the battery voltage drops below the safe threshold. This condition can result in a decrease in energy storage capacity and ... -
Sistem Monitoring dan Pengontrolan Baterai Jarak Jauh (IoT) untuk Mencegah Overdrain Berbasis Atmega 328
(Universitas Sumatera Utara, 2025)Overdrain in batteries is a common issue that can lead to permanent damage, especially when the battery voltage drops below the safe threshold. This condition can result in a decrease in energy storage capacity and ... -
Pemanfaatan Ekstrak Kasar Enzim Lipase dari Kecambah Biji Karet (Hevea brasiliensis) sebagai Bahan Aditif Biodetergen
(Universitas Sumatera Utara, 2025)This study aimed to determine the activity of lipase enzyme from rubber seed (Hevea brasiliensis) sprouts and evaluate its application as an additive in biodetergent formulation. The method used in this study included the ... -
Studi Perbandingan Akurasi Metode Perangkingan MCDM dalam Evaluasi Tingkat Pendidikan Kabupaten/Kota di Sumatera Utara
(Universitas Sumatera Utara, 2025)North Sumatra Province faces significant challenges in achieving equitable education quality across its regencies and cities. A systematic evaluation of education levels is essential to identify regions that require special ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Pirdot (Saurauia vulcani Korth.)
(Universita Sumatera Utara, 2025)Isolation and identification of flavonoid compound from the bark of Pirdot (Saurauia vulcani Korth.) had been carried out through the maceration extraction stage with methanol solvent. The methanol extract dissolved with ... -
Penerapan Regresi Data Panel Pada Model Produk Domestik Regional Bruto Sumatera Utara Tahun 2020-2023
(Universitas Sumatera Utara, 2025)Panel data regression is a method that combines cross section data and time series data, cross section data is data collected at a certain time from many observation units, while time series data is data collected from one ... -
Pemanfaatan Ekstrak Kasar Enzim Lipase dari Kecambah Biji Jarak Pagar (Jatropha Curcas L.) Sebagai Bahan Aditif Biodetergen
(Universitas Sumatera Utara, 2025)The use of synthetic detergents has caused serious environmental problems due to waste that is difficult to decompose. Utilization of lipase enzymes from castor bean sprouts (Jatropha curcas L.) is one potential solution ... -
Estimasi Parameter Least Absolute Shrinkage and Selection Operator (Lasso) Menggunakan Parameter Cyclic Coordinate Descent
(Universitas Sumatera Utara, 2025)Least Absolute Shrinkage and Selection Operator (Lasso) regression is one method that can overcome multicollinearity problems by shrinking some regression coefficients to exactly zero. Cyclic Coordinate Descent algorithm ... -
Perbandingan Tingkat Akurasi antara Support Vector Machine (SVM) Menggunakan Kernel Polinomial & Kernel Radial Basis Function (RBF) Untuk Klasifikasi Penyakit Polycystic Ovary Syndrome (PCOS)
(Universitas Sumatera Utara, 2025)Polycystic Ovary Syndrome (PCOS) is a hormonal disorder that is common in women of reproductive age. Early diagnosis of PCOS is very important to prevent long-term complications. In this study, the author classified PCOS ... -
Peranan Pengikat Na-CMC terhadap Karakteristik Fisikokimia dan Kapasitansi Spesifik Elektroda Hibrida rGO/Co3O4 Sebagai Material Superkapasitor
(Universitas Sumatera Utara, 2025)The increasing global energy demand drives the development of efficient and sustainable energy storage technologies. Supercapacitors are considered a promising solution due to their high power density and long-term stability, ... -
Prediksi Tingkat Intensitas Resiko Selama Kehamilan Dengan Regresi Logistik Ordinal
(Universitas Sumatera Utara, 2025)Ordinal logistik regression is an analytical method used to determine the relationship between a response variable and predictor variables, where the response variable is ordinal-scaled, consisting of three or more categories ... -
Sintesis Metil Eugenol Melalui Reaksi Eterifikasi pada Variasi Mol Natrium Karbonat dan Dimetil Karbonat
(Universitas Sumatera Utara, 2025)The synthesis of methyl eugenol has been carried out through the etherification reaction of eugenol with dimethyl carbonate (DMC) using sodium carbonate (Na₂CO₃) as a basic agent and tetrabutylammonium bromide (TBAB) as a ... -
Modifikasi Pati Sukun (Artocarpus altilis) Melalui Reaksi Oksidasi dengan Oksidator Asam Nitrat
(2025)Modification of breadfruit starch into carboxylate starch has been carried out through an oxidation reaction between breadfruit starch (Artocarpus altilis) and nitric acid. The oxidation reaction was carried out with ... -
Formulasi Efektivitas Gel Peel Off Mask Berbasis Kitosan dengan Penambahan Ekstrak Teh Hijau (Camellia Sinensis) Sebagai Antioksidan
(Universitas Sumatera Utara, 2025)A study has been conducted on the use of chitosan in the formulation of Peel Off Mask gel preparations as an antioxidant. Facial masks are very popular beauty care cosmetics to improve skin quality. Peel off facial ... -
Rancang Bangun Timbangan Digital Berbasis Nodemcu Esp8266 Dengan Fitur Kirim Data Berat Melalui Smartphone
(Universitas Sumatera Utara, 2025)Along with the advancement of globalization, there is a demand for digital scales that can be integrated into smart devices. The purpose of this research is to develop digital scales with higher accuracy and a lower error ... -
Penurunan Kadar Besi (Fe) dan Mangan (Mn) pada Air Sumur Bor Kawasan Tempat Pembuangan Akhir (TPA) Terjun Kecamatan Medan Marelan dengan Karbon Aktif
(Universitas Sumatera Utara, 2025)The availability of clean water is a challenge, especially for the community around Terjun landfill. Terjun landfill is located in Terjun urban village, which is located in Medan Marelan sub-district. In one of the residents' ... -
Automorfisma Graf Kipas Angin
(Universitas Sumatera Utara, 2025)This study discusses automorphisms in fan graphs, which are formed by combining a friendship graph Fn and a path graph pm, with one of the end vertices in the path graph pm directly connected to the central vertex of ... -
Modifikasi Zeolit HZSM-5 Terimpregnasi Logam Nikel dan Carbon Nanotube sebagai Katalis dalam Proses Hydrocracking Crude Palm Oil untuk Produksi Biofuel
(Universitas Sumatera Utara, 2025)This study aims to enhance the catalytic performance of HZSM-5 zeolite by incorporating nickel (Ni) via impregnation and adding carbon nanotube (CNT) for the conversion of crude palm oil (CPO) into biofuel. Three catalysts ... -
Pembuatan Edible Coating Berbasis Pati Ubi Kayu Termodifikasi dengan Penambahan Kitosan dan Aloe Vera untuk Mempertahankan Kualitas Tomat
(Universitas Sumatera Utara, 2025)Cassava starch is an abundant natural biopolymer with great potential as a base material for edible coatings due to its transparent appearance, odorless nature, and film-forming ability. However, native cassava starch ... -
Analisis Spasial Pada Pemodelan Faktor-Faktor yang Mempengaruhi Kriminalitas di Indonesia Tahun 2020-2022 dengan Geographically Weighted Panel Regression
(Universitas Sumatera Utara, 2025)Crime is one of the socio-economic issues that remains unresolved in Indonesia. Although Indonesia is known as a relatively peaceful country, in reality, many citizens still experience criminal acts. This issue requires ...