Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 61-80 of 11412
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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 ... -
Pemodelan Prevalensi Stunting di Indonesia Menggunakan Metode Regresi Nonparametrik Spline Truncated (Studi Kasus: Data BPS Tahun 2023)
(Universitas Sumatera Utara, 2025)Regression analysis is a statistical method used to determine the pattern of relationship between one variable and another. When the shape of the regression curve is unknown, nonparametric regression is used. One approach ... -
Sistem Otomatis Pemotong Daun dan Akar Bawang Merah Kering Berbasis Deteksi Tekanan dan Ketebalan
(Universitas Sumatera Utara, 2025)This study aims to develop an automatic system for cutting dry shallot leaves and roots based on pressure and thickness detection technology, as a solution to the limitations of manual cutting methods commonly used by ... -
Pendeteksian Gas Amonia (NH3) di Lahan Persawahan Berbasis Internet of Things (IoT) dan Dampaknya Terhadap Kesehatan Masyarakat di Daerah Pangkalan Susu
(Universitas Sumatera Utara, 2025)When nitrogen fertilizer is used in agricultural activities, ammonia gas (NH3) emissions increase, which has a negative impact on the health of the surrounding community. The purpose of this research is to develop an NH3 ... -
Sintesis dan Karakterisasi Nanokomposit Zn0.9Co0.1Fe2O4/Karbon Aktif Ampas Kopi dengan Metode Hidrotermal sebagai Material Elektroda Superkapasitor
(Universitas Sumatera Utara, 2025)This study, mesoporous Zn0.9Co0.1Fe2O4 (ZnCoF) and coffee grounds activated carbon (CGAC) particles have been synthesized as materials to obtain supercapacitors that have high performance. The synthesis process was carried ... -
Penggunaan Kitosan Kulit Udang Putih (Litopenaeus Vannamei) untuk menurunkan Kadar Logam Ai Dan Mn Pada Air Sungai Di Kawasan Tembung
(Universitas Sumatera Utara, 2025)Heavy metal pollution such as aluminum (Al) and manganese (Mn) in water can have negative impacts on the environment and human health. Chitosan has active amino (NH2) and hydroxyl (OH) groups, which are able to adsorb ... -
Rancang Bangun Sistem Kontrol Lampu Sein dan Lampu Hazard Otomatis Sepeda Motor Menggunakan Sensor Gyroscope MPU6050 dan Sensor Proximity Induktif
(Universitas Sumatera Utara, 2025)Traffic accidents in Indonesia remained a serious problem, particularly those involving motorcycles as the primary mode of transportation. One of the main causes was riders’ negligence in properly using turn signals when ... -
Sintesis Basa Schiff melalui Reaksi Kondensasi Selulosa Dialdehida dari Tandan Kosong Kelapa Sawit dengan Metilamina Sebagai Wet Strength Agent
(Universitas Sumatera Utara, 2025)This study examines the synthesis of Schiff bases through the condensation reaction of cellulose dialdehyde from empty palm bunches with methylamine as a wet strength agent. Cellulose dialdehyde was obtained from the ... -
Perbandingan Performa Algoritma K-Means dan DBSCAN dalam Clustering pada Data Berdimensi Tinggi
(Universitas Sumatera Utara, 2025)Clustering is one of the essential techniques in data analysis for discovering hidden patterns and grouping data based on certain similarities. However, the application of clustering algorithms to high-dimensional data ... -
Sintesis Selulosa Dialdehida Dari Tandan Kosong Kelapa Sawit Sebagai Wet Strength Agent
(Universitas Sumatera Utara, 2025)Cellulose isolation from empty palm fruit bunches (EPFB) was conducted by adding 3.5% HNO3, 2% NaOH, and 1.75% Na2SO3, NaOCl, 10% H2O2. 18.160 g of cellulose was obtained. The cellulose was oxidized using NaIO4 with a ratio ... -
Sintesis dan Uji Fotokatalitik Komposit ZnO/CuO Berbasis Ekstrak Daun Teh Hijau (Camellia sinensis) untuk Degradasi Methylen Blue (MB)
(Universitas Sumatera Utara, 2025)In this study, the synthesis, characterization, and analysis of a ZnO/CuO composite photocatalyst based on green tea leaf extract were successfully carried out. The ZnO/CuO composite was synthesized using a green ... -
Pembuatan dan Karakterisasi Papan Komposit Diperkuat Serat Bemban (Donax canniformis) dan Serbuk Kayu Jati (Tectona grandis L.f.) dengan Resin Epoksi
(Universitas Sumatera Utara, 2025)The fabrication of composite boards made from bemban fibers and teak wood powder using epoxy resin was carried out as an alternative composite material. The bemban fibers used were approximately 1 cm in length, and the ...