Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1081-1100 of 11354
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Pembuatan dan Karakterisasi Bioplastik Pati Porang (Amorhophallus Oncophyllus)/Talas Beneng (Xanthosoma Undipes K. Koch) dengan Plasticizer Sorbitol
(Universitas Sumatera Utara, 2023)Research has been carried out on the manufacture of bioplastics and chitosan with sorbitol plasticizer made using the melt intercalation method on variations of starch (porang/beneng) versus chitosan 30% : 70%, 40% : 60%, ... -
Pembuatan dan Karakterisasi Beton Polimer Berbasis Abu Sekam Padi dan Cangkang Kemiri dengan Menggunkan Resin Epoxy
(Universitas Sumatera Utara, 2023)Research has been carried out for the manufacture of polymer concrete by utilizing sand, rice husk ash, hazelnut shell ash and epoxy resin. The samples were prepared using a 120 mesh sieving stage, mixing the ingredients ... -
Dekomposisi Graf Piramida
(Universitas Sumatera Utara, 2023)Let is a graph consisting of a setcalled vertices adn a set ) called edges. Let is a subgraph of if )⊆) and ⊆. A decomposition of a graph is a collection of subgraph induced by , thus for =1,2,3,…, and graph for is a ... -
Analisis Faktor-Faktor yang Mempengaruhi Pemahaman Belajar Siswa Secara daring dengan Menggunakan Metode Stepwise
(Universitas Sumatera Utara, 2023)During the pandemic, new rules for education in Indonesia were imposed, namely that every student was required to learn from home. Regression analysis as a statistical technique used to analyze the relationship between ... -
Implementasi Metode AHP (Analytic Hierarchy Process) untuk Pemilihan Supplier Bahan Baku Konfeksi di CV. Adil Makmur Bersama
(Universitas Sumatera Utara, 2023)Analytical Hierarchy Process (AHP) method is a method of making decisions on the problem of determining the priority choice of various alternatives. The use of AHP starts with creating a hierarchical structure of the problem ... -
Analisa Perbandingan Nilai Akurasi Moving Average dan Double Exponential Smoothing Brown dalam Memprediksi Kerusakan Galon Pada Distribusi AQUA PT. Tirta Investama
(2023)A good forecasting method is a method that produces forecasts close to actual values. The Exponential Smoothing method is a frequently used forecasting method for time-series data. The Double Exponential Smoothing Brown ... -
Analisis Variasi Rasio Massa Elektrolit NH4Cl, Anoda Cu/Grafena Berlapis Nano dan Katoda Grafena Berlapis Nano pada Prototipe Baterai Primer
(Universitas Sumatera Utara, 2023)Research on Analysis of Variation of Mass Ratio of NH4Cl Electrolyte, Cu/Graphene Nano Sheets Anode and Graphene Nano Sheets Cathode on Primary Battery Prototype was carried out. The aims of this research are to analyze ... -
Kepadatan, Pola Distribusi dan Pola Pertumbuhan Kerang Bulu (Anadara antiquata) di Perairan Pantai Sialang Buah, Kabupaten Serdang Bedagai, Sumatera Utara
(Universitas Sumatera Utara, 2023)Shellfish (Anadara antiquata) is one of the mollusc belong to the class of Bivalvia. Shellfish has high economic value because of its highly nutritional content. Sialang Buah Beach is famous for its shells, especially the ... -
Jenis-Jenis Anggrek (Orchidaceae) di Kebun Raya Sipirok Kabupaten Tapanuli Selatan Sumatera Utara
(Universitas Sumatera Utara, 2023)Sipirok Botanical Garden is one of the ex-situ conservation areas in North Sumatra Province that has a diversity of plant species, one of which is Orchidaceae. The research survey that had been conducted show the Sipirok ... -
Sintesis dan Karakterisasi Hidrogel Berbasis Selulosa dari Tandan Kosong Kelapa Sawit sebagai Media Tanam pada Sistem Hidroponik
(Universitas Sumatera Utara, 2023)Oil palm empty fruit bunches are a source of natural fiber from the abundant waste material found in the North Sumatra region. The fiber of empty palm fruit bunches has a high cellulose content and has the potential to be ... -
Karakterisasi Garam Lokal Aceh sebagai Kandidat Phase Change Materials (PCM) untuk Thermal Energi Storage
(Universitas Sumatera Utara, 2022)Thermal energy storage plays important role in energy system and helps in optimize the overall efficiency. Development of energy storage system for particular purposes requires some information on the raw material which ... -
Pemodelan Matematika untuk Analisis Nilai Kepemimpinan
(Universitas Sumatera Utara, 2014)Despite mathematical leadership models related to the role of leaders in real team performance enjoying success and attention as exceptional leadership models, few scholars have investigated a specific link between ... -
Anomali Cuaca Ekstrim pada Bulan Februari 2022 terhadap Karakteristik Hujan di Kota Medan
(Universitas Sumatera Utara, 2023)Medan City is an area that experiences flooding almost every year. February is climatologically the first peak of the dry season in the North Sumatra region, but floods can still occur. In this study the authors analyzed ... -
Analisis dan Proyeksi Tingkat Kenyamanan Iklim Wisata di Kawasan Geopark Kaldera Toba
(Universitas Sumatera Utara, 2023)Caldera Toba Geopark is one of the Geoparks in Indonesia as a tourist destination that depends on natural potential to be vulnerable to climate change. Climate comfort aims to provide recommendations for the best time ... -
Pemetaan Zona Banjir ROB di Wilayah Pesisir Belawan Berdasarkan Analisis Interaksi Atmosfer dan Laut Menggunakan Model Hidrodinamika DELFT3D
(Universitas Sumatera Utara, 2023)The Delft3D Hydrodynamic Model is capable of simulating tidal floods. This study aims to map tidal floods in the port and coastal area of Belawan by analyzing the interaction between the atmosphere and significant waves. ... -
Identifikasi Karakteristik Kejadian Curah Hujan Ekstrem di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2023)This research aims to identify the spatial and temporal characteristics of extreme rainfall events in North Sumatra Province during the period between 1991 and 2020. Following the recommended rainfall parameters by WMO, ... -
Pemanfaatan Bambu dan Pasir Besi Alam (Fe3O4) dalam Pembuatan Material Magnet
(Universitas Sumatera Utara, 2023)This study aims to analyze the use of bamboo and natural iron sand (Fe3O4) as precursors in preparing a type of magnetic materials. Samples were prepared using the co-precipitation method. An amount of bamboo charcoal ... -
Sintesis dan Karakterisasi Bioplastik Polyvinyl Alcohol (PVA)/Selulosa Nanokristalin dari Serat Ijuk (Arenga Pinnata)
(Universitas Sumatera Utara, 2023)The purpose of this study is to utilize cellulose isolated from ijuk fibers as the source of nanocellulose crystalline (NCC), which would be used as filler on bioplastic polyvinvyl alcohol (PVA). To achieve NCC, ... -
Rancang Bangun Neraca Analitik untuk Kalibrasi Gelas Ukur Penakar Hujan Tipe Observatorium dengan Kontrol Massa
(Universitas Sumatera Utara, 2023)The observatory type rain gauge is a manual type rain gauge that requires a measuring cup to measure rainfall in millimeters (mm) of rain. Precise measurement requires calibration of the measuring cup so that the scale ... -
Penentuan dan Analisis Ketidakpastian Pengukuran Penakar Hujan Menggunakan Metode Monte Carlo
(Universitas Sumatera Utara, 2023)Rainfall measurements are susceptible to various sources of uncertainty that can affect measurement accuracy. Factors such as instrument calibration, weather conditions, and measurement methods contribute to measurement ...