Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 521-540 of 11437
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Implementasi Analisis Faktor dan Analisis Jalur dalam Mengidentifikasi Faktor-Faktor yang Memengaruhi Kemiskinan di Provinsi Aceh
(Universitas Sumatera Utara, 2024)This research implements factor analysis and path analysis methods to identify the factors that influence Poverty in Aceh Province. The data used is sourced from the Central Bureau of Statistics of Aceh Province in 2023. ... -
Pemodelan dan Simulasi Sistem Energi Angin pada Turbin Angin Menggunakan Simulate Multidomain Physical Systems (SIMSCAPE) pada Matlab Simulink
(Universitas Sumatera Utara, 2024)The wind energy system simulation modeling on a wind turbine was created using Simulate Multidomain Physical Systems (SIMSCAPE) in Simulink Matlab. This Program is designed to simulate wind turbines and measure wind speed, ... -
Pembuatan Adsorben dari Kulit Udang untuk Adsorpsi Logam Besi (Fe) dan Mangan (Mn) pada Air Sumur
(Universitas Sumatera Utara, 2024)The synthesis and analysis of shrimp shell chitosan as an adsorbent of Fe and Mn metals in well water in Medan Marelan, Paya Pasir sub-district has been successfully carried out using a laboratory experiment method. ... -
Kajian Integral Riemann Diperumum
(Universitas Sumatera Utara, 2024)Riemann integration theory integrates functions on a bounded interval [a,b]⊆R as a Riemann sum approach (integral) where the fineness of the partitions is controlled by a number (norm) ‖P‖. In Generalized Riemann integral ... -
Pemodelan Regresi dengan Pendekatan Generalized Linear Models pada Kasus Tuberkulosis di Sumatera Utara
(Universitas Sumatera Utara, 2024)Generalized Linear Models (GLM) are used to model data when the distribution of the response variable is part of the exponential family. The negative binomial distribution and the Poisson distribution are examples of ... -
Karakterisasi Paduan EPDM/NR SIR-20 dengan Pengisi Serbuk Cangkang Tiram (Crassostrea gigas) sebagai Peredam Benturan Pintu Kendaraan (Weather Strip)
(Universitas Sumatera Utara, 2024)Research on composites from the EPDM/NR SIR-20 alloy with the addition of oyster shell powder (Crassostrea gigas) as a filler material which is applied as a vehicle door impact absorber (weather strip). Making weather ... -
Karakteristik Sensor Berbasis Kitosan/Tembaga II Oksida (CuO) dalam Mendeteksi Konsentrasi Aseton dengan Amperometri
(Universitas Sumatera Utara, 2024)Research has been done on the characteristics of sensors based on chitosan/Copper II Oxide (CuO) in detecting acetone concentrations using the amperometric method. The effect of copper II oxide addition on chitosan film ... -
Karakteristik dan Klasifikasi Awan Konvektif Menggunakan Satelit Himawari dengan Pendekatan Model Convolution Neural Network untuk Mitigasi Keselamatan Penerbangan di Wilayah Sumatera Utara
(Universitas Sumatera Utara, 2024)Forecasting rainfall events, such as hefty rainfall, as an early warning is an important component in hydrometeorological disaster mitigation and aviation areas. Improving aviation safety depends on the weather conditions ... -
Pembuatan Filter Berbasis Bentonit dengan Karbon Aktif dari Batang Kelapa Sawit dan Cangkang Kelapa Sawit Untuk Air Tercemar
(Universitas Sumatera Utara, 2024)In this study, bentonite-based filters were made with activated carbon from palm trunks and palm shells for polluted water, using physical activation. Palm trunks and palm shells were carbonized at 300℃ for 1 hour and then ... -
Pembuatan Filter Berbasis Clay dengan Aditif Karbon Aktif dari Cangkang Kelapa Sawit dan Batang Kelapa Sawit Untuk Air Tercemar
(Universitas Sumatera Utara, 2024)Research was conducted on the production of activated carbon-based filters from palm kernel shells, palm trunks and clay as polluted water using physical activation. Palm trunks and shells were carbonised at 300°C for 1 ... -
Hubungan Umur dengan Berat Feses Gajah Sumatera (Elephas Maximus Sumatranus) di Kawasan Taman Nasional Gunung Leuser Resort Tangkahan, Langkat, Sumatera Utara
(Universitas Sumatera Utara, 2025)This research aims to explain the relationship between age and feces weight of Sumatran elephants (Elephas maximus sumatranus) in the Gunung Leuser National Park Tangkahan (GLNP) Resort, Langkat, North Sumatra. ... -
Sistem Kendali Suhu dan Laju Pemanasan Pirolisis Limbah Plastik Jenis LDPE Berbasis IoT dengan Metode PID Controller
(Universitas Sumatera Utara, 2025)Low Density Polyethylene (LDPE) plastic is a common and widely used material in society, or in industry and the environment. The large number of LDPE plastic waste needs results in environmental problems. One of the processes ... -
Aktivitas Antioksidan dan Antimikrob dari Estrak Etanol Daun Gagatan Harimau (Paraboea leuserensis B.L.Burtt) terhadap Staphylococcus aureus, Escherichia coli dan Candida albicans
(Universitas Sumatera Utara, 2025)Antioxidant and antimicrobial research of ethanol extract of Gagatan Harimau leaves (Paraboea leuserensis B.L.Burtt) against staphylococcus aureus, Escherichia coli and Candida albicans was conducted in January-April ... -
Analisis Perbandingan Model Regresi Linier Metode Forward Selection, Backward Elimination, dan Stepwise Regression (Studi Kasus Pendapatan Oli Mesin pada UD. Bengkel Mobil Abadi)
(Universitas Sumatera Utara, 2024)In selecting variables for a regression model, independent variables can explain the dependent variable and meet the assumptions of linear regression so that the regression model is BLUE (Best Linear Unbiased Estimator). ... -
Penalized Maximum Likelihood Estimation dengan Algoritma Gradient Descent pada Model Regresi Logistik Multinomial
(Universitas Sumatera Utara, 2024)Maximum likelihood estimation (MLE) is commonly used for parameter estimation of statistical models, including multinomial logistic regression. However, multicollinearity in logistic regression limits its use. Penalized ... -
Penaksiran Parameter Model Regresi Logistik Multinomial Menggunakan Metode Optimasi Stochastic Gradient Descent dengan Quasihyperbolic Momentum pada Dataset Besar
(Universitas Sumatera Utara, 2024)In multinomial logistic regression parameter estimation using maximum likelihood estimation, numerical approach with optimization method is used to get the best estimated parameters of the mentioned model. The optimization ... -
Pembuatan Keramik Konstruksi Berbasis Zeolit, Cangkang Kelapa Sawit, Dan Sekam Padi
(Universitas Sumatera Utara, 2024)The manufacture of construction ceramics based on zeolite, palm shells, and rice husks sifted to 100 mesh size has been carried out through the die pressing method. Variations of materials are 50 grams of zeolite, ... -
Sensitivitas Elektroda Termodifikasi Kitosan/Grafena Oksida Tereduksi/Serium Oksida Dalam Mendeteksi Konsentrasi Epinefrin
(Universitas Sumatera Utara, 2024)In this research, chitosan/reduced graphene oxide (rGO)/cerium oxide (CeO2) modified electrodes have been successful in detecting epinephrine using the cyclic voltammetry method. The addition of cerium oxide is considered ... -
Skrining Fitokimia dan Uji Aktivitas Antimikroba Ekstrak Metanol Akar Sidaguri (Sida rhombifolia) terhadap Beberapa Bakteri dan Jamur Patogen Manusia
(Universitas Sumatera Utara, 2025)Infections caused by pathogenic microorganisms are generally treated with antibiotics; however, inappropriate of antibiotics use can lead to resistance, in turn other antimicrobial agents need to be develope. Many antimicrobial ... -
Karakterisasi Komposit dari Paduan EPDM/NR SIR-20 dengan Pengisi Serbuk Tanah Liat (Clay) sebagai Peredam Benturan Pintu Kendaraan (Weather Strip)
(Universitas Sumatera Utara, 2024)Composite research of EPDM/NR SIR-20 alloy with the addition of clay powder as a filler used as a car door impact absorber (weather strip). The weather strip was prepared by mixing SIR-20 natural rubber with EPDM synthetic ...