Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 81-100 of 11099
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Aplikasi Penalized Maximum Likelihood Estimation pada Distribusi Weibull dengan Algoritma Gradient Descent
(Universitas Sumatera Utara, 2025)The Weibull distribution is widely used in reliability analysis and failure modeling due to its flexibility in modeling various types of data. For accurate parameter estimation, the Penalized Maximum Likelihood Estimation ... -
Estimasi Parameter Distribusi Weibull Menggunakan Metode Maksimum Likelihood
(Universitas Sumatera Utara, 2025)In various types of statistical analysis, the Weibull distribution is an important continuous probability distribution. One crucial aspect of studying this distribution is estimating its parameters. The maximum likelihood ... -
Sintesis Timah (II) Sulfat (SnSO4) Menggunakan Metode Elektrolisis dengan Parameter Tegangan, Konsentrasi, Waktu dan Jarak Elektroda
(Universitas Sumatera Utara, 2024)Tin (II) Sulfate (SnSO4) a tin-derived product that has a wide range of physical and chemical functions. The synthesis of tin (II) sulfate (SnSO4) has been carried out using the parameters of voltage, electrolyte ... -
Model Cox Proportional Hazard dalam Analisis Survival Penderita Penyakit Sirosis Hati
(Universitas Sumatera Utara, 2025)Survival analysis is a field of statistics that studies how individuals or objects endure over time. One commonly used statistical method in this field is the Cox Proportional Hazard Model. This model is used to determine ... -
Pelapisan Chrome terhadap Zirconium dengan Metoda Pack Cementation terhadap Laju Korosi
(Universitas Sumatera Utara, 2025)The manufacture of zirconium alloy coating with chrome by using pack cementation method and comparison of its corrosion Knowing the effect of coating on zirconium plate in 9000C temperature and comparing its corrosion ... -
Gambaran Histologi Pankreas Tikus (Rattus norvegicus) yang Diinduksi 7,12-Dimetilbenz-[a] Antrasena (DMBA) Dengan Pemberian Ekstrak Etanol Kulit Durian (Durio zibethinus Murr.)
(Universitas Sumatera Utara, 2025)Durian (Durio zibethinus Murr.) contains secondary metabolite compound, flavonoids metabolite compound has a role as an antioxidant. Flavonoid compounds are able to capture and neutralize free radicals so they can repair ... -
Sintesis BaFe(12-x)YxO19 Sebagai Material Penyerap Gelombang Mikro Dengan Metode Solid-State Reaction
(Universitas Sumatera Utara, 2025)In this research study, barium hexaferrite substituted with yttrium (BaFe(12-x)YxO19), microwave absorber materials has been successfully synthesized using solid-state reaction method, pre-sintering at 800 °C for 6 hours ... -
Sintesis dan Karakterisasi Phase Change Material Berbasis Komposit Peg-6000 dan Tio2
(Universitas Sumatera Utara, 2024)Research has been conducted on the synthesis and characterization of Phase Change Material based on PEG 6000 and TiO2 composite by sonication method. PEG 6000 is an organic PCM that has a high latent heat capacity to store ... -
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 ...