Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1361-1380 of 11349
-
Penerapan Analytical Hierarchy Process (AHP) dalam Menganalisis Faktor Pemilihan Masyarakat terhadap Bus Trans Metro Deli
(Universitas Sumatera Utara, 2023)This study uses the Analytical Hierarchy Process (AHP) method to determine what the community's priorities are when boarding the Trans Metro Deli bus. The approach to the AHP method is to organize the problem to be examined ... -
Rancang Bangun Alat Kontrol Kecepatan Motor Induksi Satu Fasa Berbasis Pwm Menggunakan Mikrokontroler Arduino Uno
(Universitas Sumatera Utara, 2023)Speed Control Device of Single Phase Induction Motor with frequency control has been successfully designed. It was designed using an inverter circuit consisting of a rectifier, an H Bridge circuit, a voltage amplifier ... -
Analisis Kadar Cemaran Logam Merkuri dalam Kosmetik Sediaan Krim Pemutih Wajah yang Beredar di Kota Medan Secara Spektrofotometri Serapan Atom
(Universitas Sumatera Utara, 2023)Currently, cosmetics are needed by people of all ages. It is not only used to give fragrance and make-up, but also to give a bright face effect, so market demand is increasing. Because of this need, not a few cosmetics on ... -
Sintesis Logam Nikel dari Reduksi Garam Nikel dengan Gelombang Ultrasonik serta Uji Katalisis Hidrogenolisis Gliserol
(Universitas Sumatera Utara, 2023)Ultrasonic waves were used to synthesize reduced nickel metal from anhydrous nickel chloride salt. Anhydrous nickel chloride salt was made by transforming nickel halide chloride hydrate into hexaaminnickel chloride under ... -
Implementasi Metode Fuzzy Linear Programming Pada Optimasi Produksi (Study Kasus : Produksi Tahu Pada Pabrik Tahu Dadi Mulyo)
(Universitas Sumatera Utara, 2023)Problems with production costs and control of raw materials are important parts of the production sector that need to be optimized. Given the various bad possibilities that can occur during the production process, it is ... -
Penggunaan Program dinamik untuk Menentukan Total Biaya Minimum Pada Perencanaan Produksi Paving Block di CV Mulia Genteng Beton Medan
(Universitas Sumatera Utara, 2023)Production planning is one of the important issues for a company, related to inventory control in order to produce the optimal number of products and profits. Good planning can optimize the total cost so that the company ... -
Pertumbuhan Tanaman Bayam Merah (Amaranthus tricolor) dengan Nutrisi Pupuk Organik Cair Kulit Nanas (Ananas comosus) pada Sistem Hidroponik Wick
(Universitas Sumatera Utara, 2023)This study aims to determine the effect of applying liquid organic fertilizer made from pineapple peel on the growth of red spinach (Amaranthus tricolor) to obtain the optimum POC concentration of pineapple peels to a ... -
Preparasi, Ekstraksi dan Analisis Kafein pada Urin Pengonsumsi Kopi (Coffea robusta)
(Universitas Sumatera Utara, 2023)Caffeine (C8H10N4O2) is a natural stimulant that is quickly absorbed by the body. The FDA-approved caffeine dose is 100-200 mg/day. Caffeine has the effect of increasing heart rate, gastric secretion, and basal metabolism ... -
Rancang Bangun Alat Cas Batere 10a Buck Booster Dc Ke Dc Konverter Tenaga Sinar Matahari Berbasis Atmega328
(Universitas Sumatera Utara, 2023)The use of solar power as a renewable energy is increasingly being used, solar power produces environmentally friendly energy by converting sunlight into electrical energy using solar panels. The electric power generated ... -
Sistem Pemantauan Kualitas Air Sungai Berbasis Iot Menggunakan Mikrokontroler Esp-32
(Universitas Sumatera Utara, 2023)Water was an essential resource for life on earth. Where water was needed according to the function. Water was needed by living things to survive and water was also needed for the daily activities of living things. The ... -
Rancang Bangun Inovasi Peningkatan Efisiensi Turbin Angin dengan Menggunakan MPPT (Maximum Power Point Tracking
(Universitas Sumatera Utara, 2023)An innovative tool for improving wind turbine efficiency has been successfully designed using MPPT (maximum power point tracking). This tool is designed to determine the potential of electrical energy in an area by ... -
Sintesis Galaktomanan Oleat Melalui Transesterifikasi Galaktomanan Biji Aren (Arenga Pinnata Merr.) dan Metil Oleat Menggunakan Katalis NaHCO3 dengan Radiasi Mikrowave
(Universitas Sumatera Utara, 2023)Galactomannan oleate has been syhntesis through a transesterification reaction of galactomannan sugar palm (Arenga pinnata Merr.) with methyl oleate using NaHCO3 catalyst by heating using microwave. Galactomannan oleate ... -
Studi Populasi Burung Air Migran di Kecamatan Pantai Labu Kabupaten Deli Serdang Sumatera Utara
(Universitas Sumatera Utara, 2023)Migratory birds have requirements in choosing their habitat, such as the environmental factors, the disturbances from human activities and habitat changes. Changes in habitat at an ecosystem will affect the survival of ... -
Kepadatan dan Frekuensi Kehadiran Makrofauna Tanah Pada Areal Tanaman Jagung (Zea mays L.) di UPT. Benih Induk Tanjung Selamat Kabupaten Deli Serdang
(Universitas Sumatera Utara, 2023)Technical implementation unit (UPT). Mainspring Seeds of Palawija and Horticulture Tanjung Selamat is a Research Center located in Tanjung Selamat Village, Sunggal District, Deli Serdang Regency, North Sumatra Province. ... -
Analisis Goal Programming Untuk Optimasi Perencanaan Produksi
(Universitas Sumatera Utara, 2023)In preparing production planning, the company must be able to generate profits by considering whether the production volume is able to meet market demand. In this study, researchers have a goal of minimizing raw materials, ... -
Kajian Metode Analytical Hierarchy Process (AHP) Untuk Optimasi Proses Seleksi Pemberian Kredit
(Universitas Sumatera Utara, 2023)Home is one of the main needs for humans. A house is can not only be a place to live, but a house can be an investment asset for some people. When people want to own a house, some people choose mortgage mortgages. The ... -
Isolasi dan Identifikai golongan senyawa fenolik dari bunga tumbuhan bungur besar(Lagerstroemia speciosa9L)Pers)
(Universitas Sumatera Utara, 2023)The phenolic conipound had beeri isolated from the flo1;vers of the great crepe myrtle ( L. speciosa (L.) Pers ). The flowe,·s of the giant crepe were extracted by ,nace ration, with niethanol solvent, and the ... -
Karakterisasi Sifat Optik Carbon Dots Berbahan Dasar Gula Aren dengan Penambahan Hno3, H2so4 dan H3bo3 sebagai Agen Pasivasi
(Universitas Sumatera Utara, 2023)Synthesis of carbon dots based on palm sugar using the hydrothermal method has been carried out. Palm sugar dissolved in aquades added passivation agent consisting of HNO3, H2SO4 and H3BO3 in a ratio of 1:1 was used to ... -
Rancang Bangun Sistem Pelacak dan Pengontrolan Menggunakan GPS Tracker, SMS Gateway dan Bluetooth HC-05 pada Kendaraan Bermotor
(Universitas Sumatera Utara, 2023)Tracking and Control System Tool Using GPS Tracker, SMS Gateway and Bluetooth HC-05 was successfully designed. The tool was designed using the Neo-6m GPS Module, SIM800L GSM Module, Buzzer, HC-05 Bluetooth Module, Arduino ... -
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 ...