Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 461-480 of 11436
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Aktivitas Harian Siamang (Symphalangus syndactylus Raffles) di Medan Zoo, Simalingkar Sumatera Utara
(Universitas Sumatera Utara, 2024)Siamang (Symphalangus syndactylus) is one of the primates of the Hylobatidae family that is endemic to the island of Sumatra. The difference in natural habitat conditions with artificial habitats will give an impact on the ... -
Preparasi dan Karakterisasi Komposit Karet Alam (SIR 10)/Karet Stirena Butadiena dengan Pengisi Sepiolite
(Universitas Sumatera Utara, 2024)This study examines the manufacture of natural rubber composites (SIR 10)/styrene butadiene rubber by varying the loading of sepiolite as a filler. The use of filler materials is a strategy to improve the properties of ... -
Pembuatan Membran Selulosa Asetat dengan Penambahan Karbon Aktif dari Ranting Eucalyptus alba sebagai Filter Air dalam Menurunkan Kadar Fe
(Universitas Sumatera Utara, 2024)Eucalyptus alba branches that contain cellulose compounds can be used as natural materials for the production of activated carbon to make membranes. The purpose of this study is to make cellulose acetate membranes with ... -
Analisis Produksi Pengasinan Ikan Basah dan Jumlah Produksi yang Optimal dengan Menggunakan Metode Goal Programming
(Universitas Sumatera Utara, 2023)Production is the process of creating additional value from goods and services in various forms. Then, to increase productivity and meet consumer needs, production factors are added with profit, form, time and location. ... -
Pengaruh Penambahan Zeolit Terhadap Pembuatan Beton Polymer dari Bahan Cangkang Kulit Kopi dan Batu Apung dengan Campuran Resin Polyurethane
(Universitas Sumatera Utara, 2024)The utilization of eco-friendly raw materials unique physical properties has become a focus in the development of polymer concrete technology. One of the attractive raw materials is zeolite, a natural mineral with absorption ... -
Analisis Regresi Logistik Ordinal pada Pengaruh Pelayanan terhadap Tingkat Kepuasan Pasien Rawat Inap di Rumah Sakit Murni Teguh Medan
(Universitas Sumatera Utara, 2024)Hospitals as health service providers play an important role in supporting public healt by providing high quality services, especially in providing optimal services for inpatients. Patient satisfaction is the main indicators ... -
Analisis Output Model Aliran Darah Arteri Brakialis Menggunakan Model Fluida Casson
(Universitas Sumatera Utara, 2024)Blood flow modeling is a crucial area of research in medicine and biomedical engineering. This study aims to analyze the output of a blood flow model in the brachial artery, specifically using the Casson fluid model. ... -
Penerapan Logic Fuzzy Inference System Metode Mamdani untuk Menentukan Jumlah Produksi
(Universitas Sumatera Utara, 2024)The fuzzy inference system in making daily decisions is usually based on assumptions, ensuring that every decision always produces results that are uncertain and ambiguous. Decision-making in production planning has ... -
Jenis - Jenis Tumbuhan Sumber Polen dan Analisis Faktor Lingkungan terhadap Aktivitas Terbang Heterotrigona itama (Cockerell, 1918) di Desa Bongguron, Kabupaten Simalungun
(Universitas Sumatera Utara, 2024)Heterotrigona itama is one of the bees that is widely found in tropical areas such as Indonesia. These bees do not have stingers and live in colonies. H. itama can produce honey, propolis, bee bread and also play a role ... -
Sistem Monitoring Kelembaban, Suhu dan pH pada Media Maggot Black Soldier Fly (BSF) Terintegrasi Internet of Things (IoT)
(Universitas Sumatera Utara, 2024)Increasing the production of maggot cultivation requires control of growth media quality parameters including humidity, temperature and pH. The monitoring system of humidity, temperature and pH in black soldier fly (BSF) ... -
Potensi Khamir Endofit Buah Markisa (Passiflora Edulis) dan Asam Organik yang Dihasilkan dalam Menghambat Aspergillus Flavus Toksigen
(Universitas Sumatera Utara, 2024)Passion fruit endophytic yeasts live mutualistically in plant tissues without harming the host plant. This study aims to enumerate the population of passion fruit endophytic yeasts and their ability to produce organic acids ... -
Pengaruh Pemberian Trichoderma Harzianum dan Bakteri Penstimulan Pertumbuhan pada Tanaman Tomat (Solanum Lycopersicum L.) Terinfeksi Meloidogyne Hapla
(Universitas Sumatera Utara, 2024)Pathogenic infections caused by root knot nematodes (Meloidogyne hapla) are one of the obstacles in tomato cultivation. Therefore, a biocontrol agent in the form of a nematophagus fungus is needed and the combination of ... -
Penentuan Kadar Logam pada Road Dust Berdasarkan Perbedaan Ukuran Partikel dari Jalan Dr Mansyur
(Universitas Sumatera Utara, 2024)This research aims to determine the concentration of heavy metals in road dust sediment with specific particle sizes at the Dr. Mansyur street location. The study was conducted by sieving road dust into particle sizes ... -
Karakterisasi Termoplastik Low Density Polyethylene (LDPE) dengan Filler Silika Abu Boiler Kelapa Sawit (ABKS) yang Disintesis Menggunakan Metode Kopresipitasi
(Universitas Sumatera Utara, 2024)The manufacture of Low Density Polyethylene (LDPE) thermoplastic with palm oil boiler ash silica filler has been carried out using the coprecipitation method. The synthesis of palm oil boiler ash silica (POBA) was carried ... -
Pengaruh Penambahan Zeolit Alam Pahae dan Limbah Teh dengan Resin Epoxy sebagai Perekat terhadap Karakteristik Beton Polimer
(Universitas Sumatera Utara, 2024)The production of polymer concrete has been carried out to observe the effect of adding natural Pahae zeolite and tea waste on the characteristics of polymer concrete using epoxy resin adhesive. The sample preparation began ... -
Penggunaan Smote Untuk Meningkatkan Kinerja Model Deteksi Eksoplanet Berdasarkan Data Fluks Bintang
(Universitas Sumatera Utara, 2024)detecting them is a major challenge in modern astronomy. One of the primary methods for detecting exoplanets is the transit method, which takes advantage of the changes in a star's light flux as a planet passes in front ... -
Rancang Bangun Kendali Nutrisi untuk Peningkatan Efisiensi Tanaman Hidroponik Berbasis Internet of Things (IoT)
(Universitas Sumatera Utara, 2024)As the area of agricultural land continues to decrease while the human population increases, the demand for food also rises in parallel. There is a need for planting techniques that do not use soil as a growing medium. ... -
Implementasi Sistem Pemantauan Batuk dengan Sensor Suara dan Akselerometer Berbasis Internet of Things (IoT)
(Universitas Sumatera Utara, 2024)Chronic respiratory diseases, have a significant impact on global health, especially in developing countries. Coughing is a major symptom that plays a role in the diagnosis and transmission of TB. This study aims to design ... -
Pengaruh Komposisi Fe3O4 pada Phase Change Material (PCM) Berbasis Peg 6000-Getah Damar
(Universitas Sumatera Utara, 2024)Phase change material (PCM) compositions based on PEG 6000, Fe3O4, resin, and SDBS by sonication method at 80 ° C frequency 40 kHz was prepared. The composition variations of the mass used are 2%Damar : 98%PEG6000, 2%Fe3O4 ... -
Implementasi Fuzzy Time Series Markov Chain untuk Peramalan Inflasi
(Universitas Sumatera Utara, 2024)The Fuzzy Time Series Markov Chain method has the ability to manage complex and unstable Time Series data, and provide more accurate predictions by minimising forecasting errors. In this study, the Fuzzy Time Series Markov ...