Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1381-1400 of 11350
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Sintesis dan Karakterisasi Zeolit Alam Pahae-Bottom Ash Batubara Sebagai Adsorber Logam Fe dan Mn Pada Air Sumur
(Universitas Sumatera Utara, 2023)Research had carried out for the manufacture of Pahae natural Zeolite-Bottom ash-based adsorbents from coal as an adsorbent for Fe and Mn metals in well water. The manufacture of adsorbents made from Pahae natural ... -
Pengembangan Transmisi Daya Listrik Menggunakan Cahaya Laser dengan Fiber Optik untuk Peralatan Kebencanaan di Daerah Remote
(Universitas Sumatera Utara, 2022)Natural disaster monitoring instruments as an integrated early warning system had been widely developed and placed in areas that were estimated to be prone to natural disasters. This was done to help the government and the ... -
Pembuatan dan Karakterisasi Adsorber Berbasis Zeolit Alam Pahae – Cangkang Telur Ayam untuk Pemurnian Minyak Jelantah
(Universitas Sumatera Utara, 2023)Research on the preparation and characterization of natural zeolite based adsorbents based on chicken egg shells for refining used cooking oil had carried out. The aim of this research was to produce adsorbents which can ... -
Sintesis dan Karakterisasi Selulosa Bakteri dari Ekstrak kulit Nanas dengan Penambahan Air Kelapa
(Universitas Sumatera Utara, 2023)Synthesis of bacterial cellulose from pineapple peel extract with the addition of coconut water has been carried out. Pineapple skin extract and coconut water with at ratio of 1:0, 1:1, and 2:1, added 25 grams of sugar, 2 ... -
Pemodelan Metode Arima dan Support Vector Regression (SVR) Pada Harga Saham PT Telkom Indonesia
(Universitas Sumatera Utara, 2023)Forecasting is an activity or process of predicting future values based on past data. In this study the data to be used is the stock price data of PT Telkom Indonesia. Forecasting that is commonly used in time series data ... -
Gambaran Histologi Ginjal Mencit (Mus musculus L.) Jantan yang diberi Limbah Degumming Kokon Ulat Sutera (Bombyx mori L.) yang telah dipapar Allethrin
(Universitas Sumatera Utara, 2023)Serisin is one of the proteins contained in silkworm cocoon degumming which functions as an antioxidant. The study aimed to analysed the effect of degumming waste of silkworm cocoons (Bombyx mori L.) on the morphological ... -
Penerapan Metode Autoregressive Integrated Moving Average (Arima)-Kalman Filter dalam Memprediksi Nilai Anggaran Pendapatan dan Belanja Daerah (Apbd) Provinsi Sumatera Utara Tahun 2023
(Universitas Sumatera Utara, 2022)One method that can be combined with the ARIMA forecasting method is the Kalman Filter method, which is a method that can minimize errors by estimating the parameter values. This study aims to predict the value of the North ... -
Sulfasi Miristil Alkohol dengan Menggunakan Kompleks SO3-DMF Pada Variasi Waktu Pembentukan Kompleks
(Universitas Sumatera Utara, 2023)Sulfation of myristyl alcohol was made with SO3-DMF complex formed from reaction between SO3 and DMF at temperature of 0-4°C with variations of complex formation time (3 hours, 4 hours, and 5 hours) wherein the SO3 ... -
Isolasi dan Identifikasi Golongan Senyawa Fenolik Serta Uji Aktivitas Antibakteri dari Kulit Batang Tumbuhan Mara (Macaranga Tanarius (L.) Mull.Arg) (Euphorbiaceae)
(Universitas Sumatera Utara, 2023)Isolation phenolic compounds (Methyl gallate and 4’,6,7,8 – tetrahydroxy, 5 – methoxy flavanone) from the stem bark of the Mara plant (Macaranga tanarius (L.) Mull. Arg) were isolated. 2300 g of Mara plant stem bark were ... -
Sulfasi Miristil Alkohol dengan Menggunakan Kompleks SO3-DMF pada Variasi Konsentrasi NaOH
(Universitas Sumatera Utara, 2023)The sulfation reaction between myristyl alcohol and SO3-DMF complex has been successfully done. Formation of the SO3-DMF complex by reacting DMF with SO3 gas as a result of the reaction of phosphorus pentoxide and H2SO4. ... -
Penjejak Daya Maksimum Generator Termolistrik (Gtl) Menggunakan Algoritma Pertube and Observe (P&O)
(Universitas Sumatera Utara, 2023)Research had carried out a Thermoelectric Generator (TEG) maximum power tracker was constracted with the perturb and observe (P&O) algorithms. The components used ware the INA219 sensor which functions as a current reader. ... -
Simulasi Daya Keluaran Generator Termolistrik (Gtl) Menggunakan Simulink pada Penjejak Maksimum dengan Algoritma Perturb and Observe (P&O)
(Universitas Sumatera Utara, 2023)Research had carried out for the simulation to determine the power result of thermoelectric generator (TEG) by used the maximum tracer with the perturb and observed (P&O) algorithm. This simulation made was found and ... -
Mengimplementasikan Maximum Power Point Tracking (MPPT) Mendapatkan Daya Maksimum dari Panel Surya untuk Menggerakkan Pompa 60 Watt
(Universitas Sumatera Utara, 2023)In this research, I used MPPT to was able to compensated for changes in temperature and irradiation of PV panels and produced maximum output power in the load from the panel. The components used were the ACS712 sensor and ... -
Ruang Metrik Vektor dan Teorema titik tetap dari Fungsi-Φ dada Ruang Metrik Vektor
(Universitas Sumatera Utara, 2023)In this final project, we introduce ϕ-function on positive cone of a Riesz space. We also learn about vector metric space which includes the definition and examples, characteristics, and convergence of sequences in vector ... -
Penerapan Logika Fuzzy dalam Pengoptimalan Produksi PULP pada PT.Toba PULP Lestari, Tbk dengan Metode Mamdani
(Universitas Sumatera Utara, 2023)Fuzzy logic is used to show data or information that is certain. This survey examines the used of fuzzy logic in optimizing production pulp at PT. Toba Pulp Lestari, Tbk using the Fuzzy-Mamdani approach. Constraints faced ... -
Perbandingan Metode Newton Raphson dan Metode Ridge dalam Estimasi Parameter Regresi Probit
(Universitas Sumatera Utara, 2022)Probit regression model is a non-linear model used in the process of analyzing the relationship between a response variable that has categorical properties. The problem that is very often experienced in probit regression ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Buah Tumbuhan Parijoto (Medinilla Speciosa Blume)
(Universitas Sumatera Utara, 2023)Isolation and identification of flavonoid compounds from Parijoto Fruits (Medinilla speciosa Blume) have been made through the maceration extraction step with methanol solvent. Methanol fraction was evaporated, dissolved ... -
Pengaruh Oksida Logam dari Pasir Alam dalam Pembentukan Dimer Metil Ester Asam Lemak dari Minyak Kelapa Sawit
(Universitas Sumatera Utara, 2023)Research has been carried out on the manufacture of fatty acid methyl ester dimers (FAME) from palm oil using natural sand as a catalyst. This synthesis was carried out by calcining natural sand and reacting it with FAME ... -
Sulfasi Miristil Alkohol dengan Menggunakan Kompleks SO3-DMF Pada Variasi Suhu Sulfasi
(Universitas Sumatera Utara, 2023)Miristyl alcohol with SO3-DMF has been synthesized through the sulfation reaction between myristyl alcohol and SO3 produced from the reaction of P4O10 and H2SO4 and also using DMF. Sulfation of myristyl alcohol with SO3-DMF ... -
Pembuatan Buck Konverter DC Berdaya Rendah Berbasis Mikrokontroler ATMega328
(Universitas Sumatera Utara, 2022)An ATMega328 Microcontroller-Based DC Buck Converter has been designed which consists of a buck converter circuit and an ATMega328 microcontroller circuit as a source of duty cycle regulator with PWM. The initial voltage ...