Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 781-800 of 11355
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Sintesis Natrium Selulosa Sulfat dari Limbah Kertas melalui Reaksi Sulfasi pada Pelarut Etanol
(Universitas Sumatera Utara, 2024)Synthesis of sodium cellulose sulfate by sulfation reaction between cellulose from paper and sulfuric acid. Preparation of paper samples was carried out without treatment, washing using NaOH 2% and NaOCl 2%, and isolation ... -
Alat Kontrol Pemupukan Berbasis Kadar pH, NPK dan Volume Pupuk Cair Terintegrasi Internet of Things
(Universitas Sumatera Utara, 2024)Farming generally requires a growing medium, soil is a growing medium for plants. Based on the level of quality, land is divided into fertile land to infertile land. Soil fertility assessment can be observed based on ... -
Sintesis dan Karakterisasi Sio2 Berbasis Abu Sekam Padi (Rice Husk Ash)
(Universitas Sumatera Utara, 2024)The research that has been done on Synthesis and Characterization of SiO2 Based on Rice Husk Ash with various sintering temperatures of 700 ℃, 750 ℃, 800 ℃, 850 ℃, 900 ℃, and 950 ℃ activated with 10% ZnCl2 solution using ... -
Implementasi Metode Algoritma Genetika dalam Mengoptimasi Penjadwalan Perawat pada Rumah Sakit Advent Medan
(Universitas Sumatera Utara, 2024)Scheduling hospital nurses is something that must be considered in a hospital. Scheduling nurse work shifts is necessary to arrange working hours in such a way that the quality of nurses' work is well maintained and has a ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoid dari Kulit Batang Sambung Nyawa (Gynura Procumbens (Lour.)Merr.)
(Universitas Sumatera Utara, 2024)Isolation and identification of the flavonoid compound from the stem bark of sambung nyawa (Gynura procumbens (Lour.) Merr.) had been done by maceration extraction technique with methanol solvent. The methanol extract ... -
Aplikasi Paklobutrazol dan Komposisi Media Tanam Cocopeat terhadap Pertumbuhan Bawang Sabrang (Eleutherine Palmifolia (L.) Merr.)
(Universitas Sumatera Utara, 2024)This research aims to determine the effect of the combination of paclobutrazol concentrasion and the composition of cocopeat planting media on the growth and production of sabrang onions throught morphological observation ... -
Studi Penaksiran Parameter Model Regresi Linier Berganda Berdasarkan Metode OLS, Jackknife dan Bootstrap
(Universitas Sumatera Utara, 2023)This study aims to estimate the parameters of the Multiple Linear Regression model. The methods used to estimate parameters are the OLS, Bootstrap and Jackknife methods. The results of these estimates will be compared to ... -
Respon Vetivera (Vetiveria zizanioides Linn.) Akibat Salinitas Tanah Berdasarkan Karakteristik Morfofisiologi
(Universitas Sumatera Utara, 2024)This study aims to determine the effect of salinity on the morphophysiological characteristics of vetivera grass and determine the optimal level of salinity on the growth of vetivera grass based on morphophysiological. Research ... -
Pembuatan dan Karakterisasi Beton Polimer dengan Agregat Pasir, Batu Apung dan Serat Daun Pandan Duri (Pandanus Tectorius) sebagai Filler
(Universitas Sumatera Utara, 2024)The polymer concrete manufacture and characterization has been carried out in this research by using sand aggregate, pumice, thorn pandan leaf fiber (Pandanus Tectorius) as filler and epoxy resin as adhesive by printing ... -
Pendekatan Goal Programming pada Permasalahan Optimasi Produksi dengan Multi Tujuan
(Universitas Sumatera Utara, 2023)The optimization of production in a multi-objective integer linear programming problem involes optimization the production quantity with multiple objective within the context of linear programming with integer constraints. ... -
Penerapan Metode Pemulusan Eksponensial Ganda Dua Parameter Holt dan Kuadratik Satu Parameter Brown pada Peramalan Pengguna Narkoba di Kota Binjai
(Universitas Sumatera Utara, 2023)Exponential smoothing method is one of many popular data forecasting methods that can be used when the data contains stationary, trend, and seasonal patterns. The forecasting method of drug users in Binjai City, which has ... -
Implementasi Model Persediaan Q Probabilistik dalam Perencanaan dan Pengendalian Persediaan Bahan Baku Produksi Teh Botol Sosro
(Universitas Sumatera Utara, 2023)PT. Sinar Sosro is a beverage manufacturing company. One of the products of PT. Sinar Sosro, which is known and much sought after by the general public, is Teh Botol Sosro. The uncertain demand for Teh Botol Sosro causes ... -
Penerapan Metode Analytical Hierarchy Process dalam Pemilihan Minyak Goreng Unggul pada Kelurahan Pasar Sibuhuan
(Universitas Sumatera Utara, 2022)The many of brands of cooking oil in Pasar Sibuhuan Village, Padang Lawas Regency, makes it difficult for people to determine which superior cooking oil to use in cooking. So to get superior cooking oil, a decision was ... -
Analisis dan Simulasi Numerik Model Seirs pada Penyebaran Covid-19 dengan Parameter Vaksinasi
(Universitas Sumatera Utara, 2022)COVID-19 is a disease that has become a worldwide pandemic. This research aims to construct a mathematical model on the spread of COVID-19 in Indonesia, analyze the stability of the model, and perform numerical simulations. ... -
Implementasi Metode Just in Time dalam Mengefisiensi Biaya Produksi (Studi Literatur Review)
(Universitas Sumatera Utara, 2022)In production activities, inventory problems are one thing that must be considered in order to avoid waste in the production process. This study shows the control of raw material inventory in a production to obtain optimal ... -
Penyediaan Pembalut Luka Bakar Berbasis Selulosa Bakteri Melalui Impregnasi Nanoenkapsulasi Andaliman (Zanthoxylum acanthopodium)
(Universitas Sumatera Utara, 2022)Burns need to be treated with a wound dressing, because the condition of an open wound can be contaminated with bacteria so that it prolongs the healing process. The use of gauze as a wound dressing is not effective because ... -
Penyediaan Komposit Pembalut Luka Diabetes Berbasis Selulosa Bakteri dengan Impregnasi Mikroenkapsulasi Andaliman (Zanthoxylum acanthopdium) dan Potensinya sebagai Pembalut Luka Diabetes
(Universitas Sumatera Utara, 2022)Diabetic foot ulcers or better known as Diabetic Foot Ulcer (DFU) is a common complication of diabetes mellitus that can lead to infection, amputation and even death. Wound healing processes such as DFU can be done with ... -
Analisis Kualitas Sabun Padat Transparan dengan Menggunakan Daun Eucalyptus grandis Sebagai Agen Antibakteri Staphylococcus aureus
(Universitas Sumatera Utara, 2022)Soap is one product that is quite important in people's lives. The need for soap increases from year to year as in BPS data from 2016 to 2021. The purpose of this study was to analyze the quality of transparent solid soap ... -
Sintesis dan Karakterisasi Sediaan Essence Kitosan dalam Sheet Mask sebagai Antibakteri dan Anti-Aging
(Universitas Sumatera Utara, 2022)Research has been carried out on the use of chitosan in the formulation of a essence sheet mask as an antimicrobial and anti-aging. Sheet masks are one of the cosmetics that are widely used by consumers because they contain ... -
Analisis Regresi Logistik Biner dengan Metode Stepwise pada Peristiwa Tuberkulosis
(Universitas Sumatera Utara, 2022)Tuberculosis is an infectious disease caused by the bacteria Mycobacterium tuberculosis. Among all the districts/cities of North Sumatra province, Medan has the highest cases of tuberculosis sufferers with a total of 12,105 ...