Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 81-100 of 11443
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Optimasi Parameter Tuning pada Model Regresi Logistik Lasso
(Universitas Sumatera Utara, 2025)This study examines the optimization of the C parameter defined as the inverse of λ in the LASSO logistic regression model by comparing three cross-validation methods: KFold, Stratified KFold (SKF), and Repeated ... -
Studi Pemodelan Dispersi Sulfur Dioksida dengan Menggunakan Metode Gaussian Distribution pada Peternakan Babi di Mandala
(Universitas Sumatera Utara, 2025)A livestock can caused air pollution. One type of gas produced is sulfur dioxide (SO2). To measure the concentration of sulfur dioxide in the atmosphere can be done using the pararosaniline method. With this method, an ... -
Sistem Monitoring dan Notifikasi Detak Jantung Serta Saturasi Oksigen Menggunakan Sensor MAX30102 Berbasis Internet Of Things (IoT)
(Universitas Sumatera Utara, 2025)This study aims to design and evaluate the performance of a wearable Internet of Things (IoT)-based monitoring and notification system prototype. The prototype integrates an ESP32 microcontroller, a MAX30102 sensor to ... -
Sistem Monitoring dan Kontrol Suhu serta Kelembapan Menggunakan Sensor BME280 dan ESP32 Berbasis Blynk pada Ruang Kalibrasi
(Universitas Sumatera Utara, 2025)Temperature and humidity stability were essential in a calibration room to ensure that measuring instruments operated optimally. This study aimed to design an Internet of Things (IoT)-based system capable of automatically ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Flamboyan (Delonix regia (Bojer Ex Hook.) Raf.)
(Universitas Sumatera Utara, 2025)Flamboyan (Delonix regia (Bojer Ex Hook.) Raf.) is a plant that contains phytochemical compounds that have health benefits and are efficacious as medicinal ingredients. Isolation and identification of flavonoid compounds ... -
Pembuatan dan Karakterisasi Beton Polimer dengan Agregat Batu Apung serta Bonggol Jagung dan Serbuk Karet Ban sebagai Filler
(Universitas Sumatera Utara, 2025)Rubber tire powder, corn cobs, sand, and epoxy resin are the materials used in polymer concrete, which has been the subject of extensive research. The sand and corn cobs are sieved using a 100-mesh sieve. The materials are ... -
Makrofauna Tanah sebagai Spesies Bioindikator pada Areal Perkebunan Karet yang diberi Limbah Cair Pabrik Kelapa Sawit sebagai Pupuk
(Universitas Sumatera Utara, 2025)This research was conducted to determine the density and macrofauna of soil that acts as a bioindicator species in rubber plantations owned by the community in Firdaus Village. Determination of the sampling points was used ... -
Pengembangan Sistem Kontrol pH dan Suhu Pada Fermentasi Teh Kombucha Berbasis Internet Of Things (IoT)
(2025)This research focuses on the development of an automatic control system capable of regulating pH and temperature during the fermentation process of kombucha tea based on the Internet of Things (IoT). Kombucha is a ... -
Pencarian Nilai Minimum dengan Dua Dimensi pada Algoritma Gauss Newton
(Universitas Sumatera Utara, 2015)Gauss-Newton algorithm is an iterative method used in solving the non-linear least- squares. As is known Gauss Newton algorithm does not always work forever, it can sometimes show weak to convergence rate. In this problem, ... -
Pengembangan Sistem Pengukuran Resistansi Bumi dan Implementasi Grounding Batang (Rod) Pembangkit Listrik Tenaga Hybrid Berbasis IoT Menggunakan Aplikasi Thingspeak
(Universitas Sumatera Utara, 2025)This research aims to develop a soil resistivity measurement system for a hybrid power generation system that integrates solar energy and wind turbines, utilizing Internet of Things (IoT) technology for real-time monitoring ... -
Pengembangan Sistem Pengukuran Resistansi Bumi dan Implementasi Grounding Batang (Rod) Pembangkit Listrik Tenaga Hybrid Berbasis IoT Menggunakan Aplikasi Thingspeak
(Universitas Sumatera Utara, 2025)This research aims to develop a soil resistivity measurement system for a hybrid power generation system that integrates solar energy and wind turbines, utilizing Internet of Things (IoT) technology for real-time monitoring ... -
Sintesis dan Karakterisasi Material Elektroda Superkapasitor Berbasis Karbon Aktif Tandan Kosong Kelapa Sawit (Elaeis Guineensis)/NiCoMnO2
(Universitas Sumatera Utara, 2025)This study is aimed to synthesize and characterize activated carbon-based supercapacitor electrode materials from empty palm bunches (TKKS) doped with NiCoMnO₂ using the hydrothermal method. The synthesis process involved ... -
Sistem Peringatan Dini untuk Mencegah Suhu yang Berlebihan pada Kabel Listrik Berbasis Sensor Suhu DS18B20
(Universitas Sumatera Utara, 2025)Overheating of electrical cables due to excessive power is one of the main causes of electrical fires in residential and industrial installations. This study aims to design and implement an Internet of Things (IoT)-based ... -
Sistem Pendeteksian Pencemaran Karbon Dioksida (Co2) di Lahan Persawahan Berbasis Internet Of Things (IoT) dan Dampaknya Terhadap Kesehatan Masyarakat
(Universitas Sumatera Utara, 2025)Agriculture is one of the important sectors in food supply, but intensive activities such as the use of inorganic fertilizers contribute to increased carbon dioxide (CO₂) emissions. High concentrations of CO₂ in the ... -
Sistem Monitoring PM2.5 dan SO2 Berbasis Internet of Things dan Hubungannya Terhadap Tingkat Kesehatan Masyarakat di PLTU Pangkalan Susu
(Universitas Sumatera Utara, 2025)Coal-fired power plants are significant contributors to air pollution, primarily through the emission of Particulate Matter (PM2.5) and sulfur dioxide (SO2) from fossil fuel combustion. The designed system utilizes sensors ... -
Karakteristik Briket Arang Tandan Kosong Kelapa Sawit dengan Perekat Berbahan Tepung Sagu, Tepung Maizena, dan Natrium Silikat
(Universitas Sumatera Utara, 2025)The increase in fossil fuel use increases every year along with the growing activities of society, resulting in a decrease in the availability of fossil fuels. Biomass renewable energy sources have the potential to replace ... -
Sistem Pengukuran PM2.5 dan SO2 Berbasis Internet of Things untuk Melihat Pengaruhnya terhadap pH Air
(Universitas Sumatera Utara, 2025)Air pollution resulting from industrial activities—particularly Coal-Fired Power Plants (CFPPs)—has become a critical issue affecting environmental quality and public health. Fine particulate matter (PM₂.₅) and sulfur ... -
Pengaruh Variasi Massa Kalium Hidroksida dalam Aktivasi Arang terhadap Nilai Kalor Briket Arang Tempurung Kelapa
(Universitas Sumatera Utara, 2025)Research has been conducted on the effect of KOH mass variation in charcoal activation on the calorific value of coconut shell charcoal briquettes. KOH was used as an activator of coconut shell charcoal. The coconut shell ... -
Sistem Pemantauan PM2.5 dan SO2 serta Analisis Dampak Hujan Asam terhadap pH Tanah di Sekitar PLTU Pangkalan Susu Terintegrasi Internet of Things (IoT)
(2025)Air pollution caused by sulfur dioxide (SO₂) emissions and fine particulate matter (PM2.5) had the potential to cause acid rain, which affected soil quality, particularly soil pH. This study aimed to design and develop ... -
Analisis Pengaruh Getaran Akibat Penambahan Beban Massa pada Bilah terhadap Keandalan Sistem Turbin Angin
(Universitas Sumatera Utara, 2025)Load imbalance and uneven wind pressure distribution on wind turbine blades can induce excessive vibrations that pose a risk to system reliability. This study aims to analyze the effect of additional mass loads on the ...