Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 241-260 of 11448
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Analisis Kandungan Cr, Mn, Zn Berdasarkan Kelarutan Dalam Air pada Debu Jalan di Jalan Jenderal Besar A.H. Nasution
(Universitas Sumatera Utara, 2025)Road dust can be contaminated with heavy metals from non-exhaust vehicle emission. Rainfall can carry these heavy metals to water bodies and causing pollution that endangers living organism. This research aims to determine ... -
Aktivitas Antioksidan dan Antimikroba Minyak Nilam (Pogostemon cablin Benth.) dari Hidrodistilasi Menggunakan Radiasi Mikrowave dan Pra-Perlakuan Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025)A combination of homogenizer-assisted cell disruption and microwave-assisted hydrodistillation was conducted to extract patchouli oil (Pogostemon cablin Benth.). This study investigated the effect of stirring time (5, 10, ... -
Preparasi dan Karakterisasi Hybrid Bionanokomposit Berbahan Polycaprolacton dengan Pengisi Nano Abu Sekam Padi dan Nano TiO2 Sebagai Material Adsorben Limbah Methyl Red
(Universitas Sumatera Utara, 2025)Wastewater contamination by synthetic dyes such as Methyl Red poses serious environmental and health risks, necessitating effective remediation methods. This study investigates an eco-friendly hybrid bionanocomposite based ... -
Kajian Model SITR (Susceptible - Infected - Treatment - Recovered) pada Penyebaran Penyakit HIV/AIDS di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)This study aims to examine and apply the SITR (Susceptible-Infected-Treatment-Recovered) model to the spead of HIV/AIDS in North Sumatra. This model is divided into 4 compartments, namely the population of individuals ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Cemara Angin (Casuarina cunninghamiana Miq.)
(Universitas Sumatera Utara, 2025)The isolation and identification of flavonoid compounds from the bark of Casuarina cunninghamiana Miq. have been carried out through several stages, beginning with maceration extraction using methanol as the solvent, ... -
Pemanfaatan Karbon Aktif Dari Rumput Gajah (Pennisetum purpereum) Dan Mangan Dioksida Sebagai Elektroda Superkapasitor
(Universitas Sumatera Utara, 2025)The growing need for sustainable and eco-friendly energy storage solutions has led to advancements in high-performance supercapacitors with extended cycle life. This research explores the fabrication of composite electrodes ... -
Sintesis Hidrogel Komposit Selulosa Karboksimetil Kulit Durian Dengan Penambahan Grafena Oksida Dan Tio2 Sebagai Adsorben Metilen Biru
(Universitas Sumatera Utara, 2025)The synthesis of a composite hydrogel based on carboxymethyl cellulose derived from durian rind, combined with PVA-ALG polymer, and supplemented with fillers in the form of graphene oxide and TiO₂ at varying concentrations ... -
Pembuatan dan Karakterisasi Superabsorben Polimer Berbasis Natrium Karboksimetil Selulosa dan Hidroksietil Metil Selulosa Menggunakan Asam Suksinat sebagai Agen Ikat Silang
(Universitas Sumatera Utara, 2025)This study examines the preparation of polymer superabsorbent from sodium carboxymethyl cellulose (Na-CMC) and hydroxyethyl methyl cellulose (HEMC) with succinic acid crosslinking agent. The preparation of polymer ... -
Kajian Optimalisasi Metode Fuzzy TOPSIS dalam Pemilihan Saham dengan Evaluasi terhadap Risiko dan Return
(Universitas Sumatera Utara, 2025)This study aims to mathematically examine the results of stock selection analysis in the banking sector listed on the Indonesia Stock Exchange (IDX) using the Fuzzy Technique for Order Preference by Similarity to Ideal ... -
Analisis Aliran Darah Pseudoplastik di Sekitar Penyumbatan Parsial Pembuluh Retina dengan Pendekatan Non-Newtonian
(Universitas Sumatera Utara, 2025)Retinal Vein Occlusion (RVO) is one of the retinal vascular disorders characterized by blood flow obstruction due to partial venous blockage. To realistically represent this phenomenon, a blood flow model capable of ... -
Perencanaan Persediaan dengan Metode Continuous Review System dan Peramalan untuk Meminimalkan Biaya Persediaan di PT Intrafood Singabera Indonesia
(Universitas Sumatera Utara, 2025)PT Intrafood Singabera Indonesia faces challenges in managing its ginger raw material inventory due to the use of conventional inventory control methods. Throughout 2023, the company recorded 107 procurement activities ... -
Analisis Aliran Darah Non-Newtonian Pseudoplastik di Arteri Ginjal pada Kasus Stenosis Arteri Renalis Menggunakan Model Carreau
(Universitas Sumatera Utara, 2025)This study aims to analyze the behavior of blood flow as a non-Newtonian pseudoplastic fluid in renal arteries that experience stenosis with a degree of narrowing of 60% in various geometric shapes. The approach used in ... -
Peramalan Indeks Harga Konsumen Kota Medan Menggunakan Metode Fuzzy Time Series Markov Chain
(Universitas Sumatera Utara, 2025)The Fuzzy Time Series Markov Chain (FTSMC) method is used to forecast time series data that contains uncertainty, based on fuzzy set theory and the concept of Markov chains. This forecasting process involves four main ... -
Pembuatan dan Karakterisasi Beton Polimer Berbahan Dasar Serbuk Jerami Padi dan Serbuk Kaca dengan Perekat Resin Epoxy
(Universitas Sumatera Utara, 2025)Sand, rice straw powder, glass powder and epoxy resin are the ingredients of polymer concrete, which has been the subject of much research. The sand and rice straw powder are sieved with a 100 mesh sieve. Then the materials ... -
Penerapan Metode Fuzzy PROMETHEE dalam Penentuan Metode Persalinan Ibu
(Universitas Sumatera Utara, 2025)Decision-making in the healthcare sector, particularly in determining the method of childbirth, is a complex process involving various medical and non-medical criteria. This study aims to implement the Fuzzy PROMETHEE ... -
Optimasi Produksi Padi dengan Menggunakan Fuzzy Linear Programming di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)Rice production faces various challenges in the form of uncertainties in the use of resources such as harvest area, seed availability, fertilizer realization, and labor. This research aims to apply the fuzzy linear programming ... -
Optimasi Penjadwalan Transportasi untuk Efisiensi Distribusi Beras di Sumatera Utara dengan Algoritma Genetika (Studi Kasus: Perum Bulog Medan)
(Universitas Sumatera Utara, 2025)The intercity rice distribution system in North Sumatra, managed by Perum Bulog Medan, continues to face significant challenges in the form of high transportation costs and suboptimal delivery scheduling. This study aims ... -
Implementasi Metode Goal Programming pada Perencanaan Produksi di Pabrik Roti Wati Bakery
(Universitas Sumatera Utara, 2025)Pabrik Roti Wati Bakery faces challenges in optimizing donut production due to raw material limitations and the imperative to maximize profit. This research implements the Goal Programming (GP) method as a multi-objective ... -
Optimalisasi Pendistribusian Barang Menggunakan Model Binary Integer Linear Programming pada CV. Padang Jaya
(Universitas Sumatera Utara, 2025)The Binary Integer Linear Programming (BILP) model is a mathematical optimization model capable of solving problems hat is able to solve problems with decision variables in the form of binary numbers, namely 0- 1. This ... -
Penerapan Metode Fuzzy Goal Programming dalam Optimasi Jumlah Produksi pada Fazana Bakery Labuhanbatu Utara
(Universitas Sumatera Utara, 2025)Optimal production planning is very important to achieve efficiency in the production process of a product. This research was conducted at Fazana Bakery with the aim of designing a Fuzzy Goal Programming model as a ...