Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 41-60 of 11051
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Metode Structural Equation Modelling (SEM) untuk Menentukan Kelayakan Penerima Program Keluarga Harapan (PKH) Kecamatan Medan Barat
(Universitas Sumatera Utara, 2024)Structural Equation Modeling (SEM) is a statistical analysis method used to test the relationship between variables in a model. SEM can be used as a statistical technique that takes into account latent and manifest variables, ... -
Pemrograman Nonlinear dengan Metode Fungsi Barrier untuk Optimasi Produksi Padi
(Universitas Sumatera Utara, 2025)Paddy is one of the important food crops in Indonesia that can be processed into rice which has an important role in fulfilling national food needs. North Sumatra is one of the rice paddy producing areas in Indonesia. ... -
Kajian Metode Penalti dan Aplikasinya Pada Masalah Penugasan
(Universitas Sumatera Utara, 2025)One method that can be used to solve linear programming problems is the penalty method. The penalty method can solve the maximum case and the minimum case. Such cases are often found in everyday life in assignment problems. ... -
Pembuatan Alat Ukur Torsi Statis Motor Penggerak Rotasi dengan Sensor Load Cell Berbasis Nodemcu Esp8266
(Universitas Sumatera Utara, 2025)This research describes the process of designing, making, and testing a static torque measuring instrument for rotational drive motors based on NodeMCU ESP8266. Static torque measurement on a rotational motor is an important ... -
Studi Populasi Ikan Bilih (Mystacoleucus padangensis Bleeker, 1852) di Perairan Danau Toba, Sumatera Utara
(Universitas Sumatera Utara, 2025)Lake Toba has considerable fishery resources with various types of fishes utilized by the community, one of them is bilih fish. Bilih fish (Mystacoleucus padangensis) is an endemic fish of Lake Singkarak which was introduced ... -
Gambaran Histologi Testis Mencit (Mus musculus L.) yang Terpapar Asap Rokok dengan Pemberian Ekstrak Daun Sirih Cina (Peperomia pellucida L.)
(Universitas Sumatera Utara, 2025)Chinese betel leaf extract has the potential to omit the free radicals due to its antioxidant activity. The aim of this study was to determine the efficacy of Chinese betel leaf extract on the morphology and histology of ... -
Pemanfaatan Cesium-137 pada Pengukuran Akurasi Dosis dan Sebagai Sumber Standar Kalibrasi pada Alat Ukur Radiasi Surveymeter Ranger Sn R314649
(Universitas Sumatera Utara, 2024)Research has been conducted on the utilization of cesium-137 in the measurement of dose accuracy and as a standard source of calibration on the ranger Sn R314649 surveymeter radiation measuring instrument with the aim of ... -
Penerapan Teori Permainan Untuk Strategi Bisnis Perusahaan Jasa Pengiriman Barang (Studi Kasus: Persaingan JNE dan J&T Lingkup Mahasiswa Universitas Sumatera Utara)
(Universitas Sumatera Utara, 2022)The development of an increasingly modern era is marked by the increasing number of companies that can facilitate the community. One example is a freight forwarding company. This causes a high level of competition in these ... -
Karakterisasi Membran Karet Alam Terdeproteinasi/Polistirena Tersulfonasi dengan Penambahan Divinil Benzena sebagai Pereaksi Pengikat Silang
(Universitas Sumatera Utara, 2024)This research examines the characterization of membranes with the main materials, namely deproteinised natural rubber and sulfonated polystyrene. This research aims to see the characteristic properties of the DPNR-g-MA/sPS ... -
Pemanfaatan Sludge Palm Oil Menjadi Metil Ester Asam Lemak Menggunakan Katalis Enzim Lipase pada Variasi Rasio Molar dan Berat Lipase
(Universitas Sumatera Utara, 2024)Palm Oil sludge has potential as a raw material for producing biodiesel because it contains triglycerides and free fatty acids which can be converted into methyl esters. Research was carried out to utilize palm oil sludge ... -
Peningkatan Kemampuan Adsorpsi Selulosa Bakteri dengan Penambahan Grafena Oksida dari Batubara Sawahlunto Secara Ex-Situ Sebagai Adsorben Rhodamin B
(Universitas Sumatera Utara, 2024)Industrial effluents contain a wide range of water-soluble organic dyes such as rhodamine B (RhB) dye. Therefore, a method to remove RhB is needed, namely by adsorption. Adsorption can be done using BC and BC/GO composites. ... -
Sintesis Nitrogen-Doped Carbon Dots (N-CDS) dengan Metode Hidrotermal dari Kulit Nangka dan Potensinya Sebagai Antibakteri
(Universitas Sumatera Utara, 2024)This research aims to utilize jackfruit peel waste as a carbon source for synthesizing Carbon Dots (CDs) and Nitrogen-Doped Carbon Dots (N-CDs), as well as to evaluate the antibacterial potential of N-CDs. In the first ... -
Peningkatan Aktivitas Fotokatalitik Titanium Dioksida Termodifikasi Carbon Dots Biji Asam Jawa (Tamarindus Indica.L) sebagai Bahan Pendegradasi Pewarna Naftol Hijau B
(Universitas Sumatera Utara, 2024)The photodegradation ability of titanium dioxide nanoparticles can be increased by the addition of carbon dots from tamarind seeds (Tamarindus indica.L) in degrading green naphthol B synthetic dye. The stages carried out ... -
Sintesis Poliuretan dari Campuran Getah Damar Mata Kucing (Shorea Javanica) dan Peg 400 dengan Toluena Diisosianat (TDI)
(Universitas Sumatera Utara, 2024)The synthesis of polyurethane from Damar mata kucing (Shorea Javanica) and PEG 400 using isocyanate monomer was carried out by reacting the resin resin with 98% formic acid and 30% H2O2, then polyurethane was made by ... -
Efektivitas Karbon Aktif Kulit Biji Kopi Sebagai Adsorben Terhadap Penurunan Kadar Logam Besi (Fe) pada Air Sumur Bor
(Universitas Sumatera Utara, 2024)The material that can be used to make active carbon is coffee bean skin which is still underutilized. This research was carried out to reduce iron (Fe) levels using activated carbon from coffee bean skins with KOH activator ... -
Pengukuran Laju Paparan Radiasi dan Efektivitas Perisai Radiasi Pada Ruang Cs-137 di BPFK Medan
(Universitas Sumatera Utara, 2024)One of the radiation protection programs has been carried out by measuring the exposure to scattering radiation around the cesium-137 room at BPFK Medan. Measurements were made in five rooms using a babyline surveymeter. ... -
Pengaruh Penambahan Polivinil Alkohol terhadap Pembuatan dan Karakterisasi Biodegradable Foam dari Tepung Porang dan Serat Cangkang Biji Kopi
(Universitas Sumatera Utara, 2024)This research has been conducted to make biodegradable foam using porang flour, coffee bean shell fiber and magnesium stearate with the addition of polyvinyl alcohol (PVA) variations of 40%, 50% and 60%. The stages in this ... -
Pembuatan dan Karakterisasi Karbon Aktif dari Ampas Teh Sebagai Adsorben Ion Pb
(Universitas Sumatera Utara, 2024)The manufacture and characterization of activated carbon from tea dregs as an adsorbent of Pb ions has been carried out. This study aims to make activated carbon from tea dregs as an adsorbent of Pb ions; determine the ... -
Pengaruh Komposisi Al2O3 pada Phase Change Material Berbasis Peg–6000
(Universitas Sumatera Utara, 2024)Phase Change Material (PCM) research has been conducted by mixing PEG 6000 - Alumina Oxide (Al2O3) - Sodium Dodecyl Benzene Sulfonate as a Thermal Energy Storage (TES) application. This research is intendent to produce the ... -
Peramalan Harga dan Tren Saham Menggunakan Model Arima-Garch dan Hidden Markov Model
(Universitas Sumatera Utara, 2024)In this study, the ARIMA-GARCH model is used to forecast stock prices and volatility, while the Hidden Markov Model (HMM) is used to detect hidden trends based on the forecasting results. The data used is the historical ...