Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 41-60 of 11443
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Studi Etnobotani dan Skrining Fitokimia Tumbuhan Obat untuk Sistem Peredaran Darah pada Masyarakat Kecamatan Tamiang, Hulu Aceh Tamiang
(Univesitas Sumatera Utara, 2025)The use of traditional medicinal plants plays an important role in maintaining public health, particularly in the treatment of circulatory system diseases, which remain a major health concern. This study aims to document ... -
Pengaruh Intrusi Air Laut terhadap Karakteristik Air Sumur Bor dan Konvensional di Desa Dusun 1 Pantai Cermin Kanan Sumatera Utara
(Universitas Sumatera Utara, 2025)Seawater intrusion is a serious threat to groundwater quality in many coastal areas, particularly in Indonesia, an archipelagic country that is highly vulnerable to rising sea levels and excessive groundwater extraction. ... -
Kekayaan Jenis Liken di Taman Wisata Alam Sicike-Cike Kabupaten Dairi dan Potensinya Sebagai Sumber Antioksidan
(Universitas Sumatera Utara, 2025)Research on lichens in North Sumatra is still limited; in fact, lichens have potential that can be utilized in the fields of health and pharmaceuticals. This study aims to identify liken species found in the Sicike-cike ... -
Penaksiran Parameter Model ARIMA dengan Metropolis-Hastings dan Gibbs Sampling
(Universitas Sumatera Utara, 2025)The ARIMA model is one of the most widely used methods in time series analysis, particularly for forecasting. The accuracy of the ARIMA model strongly depends on precise parameter estimation. The aim of this study is to ... -
Penentuan Optimal Produksi Dimsum Menggunakan Metode Goal Programming pada PT. Juragan Dimsum
(Universitas Sumatera Utara, 2025)This study aims to determine the optimal production capacity of dimsum at PT. Juragan Dimsum using the Goal Programming method. In the planning process, the company faces several constraints, including meeting market demand, ... -
Adsorben Berbasis Zeolit Alam Pahae dan Karbon Aktif Ampas Kopi Sebagai Filter Gas Buang Kendaraan Bermotor Roda Dua
(Universitas Sumatera Utara, 2025)Research on zeolite-activated charcoal based adsorbent of coffee grounds as exhaust filters for two-wheeled motor vehicles has been conducted. Zeolite as matrix and activated carbon coffee grounds as filler with powder ... -
Analisis Dosis Paparan Pekerja Radiasi Menggunakan Thermoluminescent Dosimeter (TLD) di Wilayah Sumatera Utara Periode September 2022 – November 2024
(Universitas Sumatera Utara, 2025)This study was conducted to determine the level of radiation exposure received by radiation workers in the North Sumatra region during the period from September 2022 to November 2024. In addition, the study aimed to observe ... -
Keberadaan Serangga dan Peranannya Pada Lahan Pertanian Padi (Oryza sativa L.) di Kecamatan Medang Deras Kabupaten Batu Bara Sumatera Utara
(Universitas Sumatera Utara, 2025)The presence of insects is greatly influenced by the growth period of rice plants (Oryza sativa L.). During its growth period, it often experiences insect disturbances, including pests, pollinators and predators. The study ... -
Implementasi Goal Programming dalam Mengoptimalkan Penjadwalan Perawat Rumah Sakit Umum Mitra Medika Amplas
(Universitas Sumatera Utara, 2025)Nurse scheduling is a common problem in hospitals, making it crucial to devise an optimal schedule for maintaining the quality of healthcare services in hospitals. This study proposes an optimization model for nurse ... -
Kajian Model SIR-ASI pada Penyebaran Penyakit Demam Berdarah Dengue dengan Adanya Klasifikasi Usia
(Universitas Sumatera Utara, 2025)This study develops an SIR-ASI model for Dengue Hemorragic Fever (DHF) by incorporating age classification in the human population, specifically into children and adults groups. The model is structured into nine compartments: ... -
Sintesis Membran Selulosa Asetat dari Nata De Coco dengan Penambahan Diklorometana menggunakan Metode Inversi Fasa
(Universitas Sumatera Utara, 2025)This study aims to synthesize and characterize cellulose acetate membranes derived from nata de coco with the addition of dichloromethane (DCM) using the phase inversion method. Nata de coco was selected due to its high ... -
Implementasi Sensor GPS NEO-6M Terintegrasi Google Maps API dan ESP32 pada Sistem Website Navigasi Rute Angkutan Kota Medan Sekitarnya
(Universitas Sumatera Utara, 2025)This study successfully implemented a website-based navigation system for the city transportation routes (angkot) in Medan and its surrounding areas by utilizing the NEO-6M GPS sensor, the ESP32 microcontroller, and ... -
Pengembangan Sistem Monitoring dan Pengendalian Penggunaan KWh Meter Token sebagai Sistem Pembatas Listrik Mandiri pada Kamar Kos
(Universitas Sumatera Utara, 2025)The increasing demand for electricity in Indonesian boarding houses often leads to disputes and unfair billing practices, primarily due to limited transparency and lack of control over individual energy usage. This ... -
Karakterisasi Pasir Besi Alam dan Cangkang Buah Karet untuk Material Penyerap Logam Berat Pb dalam Air Tercemar
(Universitas Sumatera Utara, 2025)The synthesis of natural iron sand and rubber fruit shell was successfully carried out to develop an adsorbent material for removing Pb heavy metal from contaminated water. The synthesis was conducted using the Solid State ... -
Sintesis dan Karakterisasi Ijuk "Arenga pinnata" dan Pasir Besi Alam sebagai Penyerap Gelombang Mikro
(Universitas Sumatera Utara, 2025)This study aims to synthesize and characterize activated carbon-based composites from Arenga pinnata fiber and natural iron sand as microwave absorbing materials. The synthesis was carried out using the solid state reaction ... -
Pembuatan Karbon Aktif Ampas Tebu dengan Polivinil Alkohol (PVA) sebagai Adsorben Logam Timbal (Pb) dan Besi (Fe) pada Air Sumur
(Universitas Sumatera Utara, 2025)This study aimed to produce and characterize activated carbon derived from sugarcane bagasse with polyvinyl alcohol (PVA) as an adsorbent for lead (Pb) and iron (Fe) in well water. The carbon was produced through a ... -
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 ...