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All Journal Jupiter Paradikma: Jurnal Pendidikan Matematika Jurnal Daya Matematis Al Ishlah Jurnal Pendidikan BAREKENG: Jurnal Ilmu Matematika dan Terapan AXIOM : Jurnal Pendidikan dan Matematika Prima: Jurnal Pendidikan Matematika Jurnal Kridatama Sains dan Teknologi Jambura Journal of Biomathematics (JJBM) Mosharafa: Jurnal Pendidikan Matematika Griya Journal of Mathematics Education and Application Jurnal SAINTIKOM (Jurnal Sains Manajemen Informatika dan Komputer) ALACRITY : Journal Of Education MATHunesa: Jurnal Ilmiah Matematika Innovative: Journal Of Social Science Research Tekmulogi: Jurnal Pengabdian Masyarakat Journal of Mathematics, Computation and Statistics (JMATHCOS)
Yulita Molliq Rangkuti
Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Journal : Journal of Mathematics, Computation and Statistics (JMATHCOS)

 1 
Implementasi Partitioning Around Medoids Pada Visualisasi Penyebaran Penyakit DBD di Sumatera Utara Fadillah, Wahyu Nur; Rangkuti, Yulita Molliq; Karo, Ichwanul Muslim
Journal of Mathematics, Computations and Statistics Vol. 6 No. 2 (2023): Volume 06 Nomor 02 (Oktober 2023)
Publisher : Jurusan Matematika FMIPA UNM

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Abstract

This research aims to develop a Geographic Information System (GIS) using the PartitioningAround Medoids (PAM) method in mapping dengue hemorrhagic fever (DHF) cases in North SumatraProvince. DHF has symptoms of high fever, bleeding, and a high mortality rate if not treated quickly.Therefore, mapping DHF cases is very important in efforts to tackle and prevent this disease. The PAMmethod was used in this study to cluster the DHF case data based on similar characteristics. The firstcluster consists of 18 districts/municipalities is a low cluster, the second cluster consists of 3districts/municipalities is a high cluster, and the third cluster consists of 3 districts/municipalities is amedium cluster. The implementation of PAM is done by using the Minkwoski distance calculation methodwhere the application of the distance will be tested with the Silhouette Index on several numbers of clusters.The best number of clusters for PAM implementation is 3 clusters with a Silhouette Index value of 0.5275.
Penggunaan Analisis Biplot dalam Pengelompokan Kabupaten/Kota di Provinsi Sulawesi Selatan Berdasarkan Indikator Kesejahteraan Masyarakat Rangkuti, Yulita Molliq; Landong, Ahmad; Tarigan, Dewan Dinata
Journal of Mathematics, Computations and Statistics Vol. 6 No. 2 (2023): Volume 06 Nomor 02 (Oktober 2023)
Publisher : Jurusan Matematika FMIPA UNM

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Fixed free beam is one of the components that are most often used as raw materials for furnitureand building construction. The use of wooden beams is inseparable from several important issues that mustbe taken into account, including stiffness, strength, stability, and flexibility. The problem of free vibrationthat occurs in wooden beams must also be taken into account. All systems that have mass and elasticity canexperience free vibrations or vibrations that occur without external stimulation. This free vibration occurswhen the system on the object oscillates due to the work of the forces that exist in the system itself (inherent).The free vibration of the wooden beams must be overcome by damping, so that it does not seriously affectthe structure of the strength, stability, and flexibility of the wooden beams. Damping can be done by lookingfor free vibration points or vibration mode shapes on fixed free beams. One approach that can be used tofind the mode shapes is a numerical approach using the Reyleigh-Ritz method. The methodology used isthe development of a python script to find free vibration modes on the beam. In this article, the beam with a length of 0.5 meters and a thickness of 2.25 × 10^−4 meters is selected as a simulation model.
Distance Function Analysis on Fuzzy C-Means for Clustering Aquaculture Production in North Sumatra hafni, Nur; Rangkuti, Yulita Molliq; Karo, Ichwanul Muslim Karo
Journal of Mathematics, Computations and Statistics Vol. 8 No. 1 (2025): Volume 08 Nomor 01 (April 2025)
Publisher : Jurusan Matematika FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/jmathcos.v8i1.6500

Abstract

Abstrac As a maritime country, Indonesia has considerable fisheries resource potential, including in North Sumatra. However, less than optimal management causes a gap between the demand and supply of cultivated fish in this region. This research aims to analyze the use of the Fuzzy C-Means (FCM) method in classifying aquaculture production in North Sumatra based on Regency/City and primary commodities. This research also compares three methods of measuring Euclidean, Manhattan, and Chebyshev distances to determine the best method for data clustering. The North Sumatra Central Statistics Agency (BPS) data for 2018-2022. The results showed that there were two clusters, namely cluster 1 consisting of 4 districts with high fisheries production and cluster 2 consisting of 29 districts with low fisheries production. Evaluation using the Modified Partition Coefficient shows that the Manhattan distance method has the highest MPC value of 0.922. These results indicate that of the three distance methods, the Manhattan method is the best for applying Fuzzy C-Means to classify aquaculture production in North Sumatra.
Co-Authors Adidtya Perdana, Adidtya Ahmad Landong Ahmad Rifai Siregar, Ahmad Rifai Ahyar, Khoirul Alkhasannah, Riani Anggraini, Nisa Putri Arnita Arnita Dian Armanto DIdi Febrian Dona Fitriawan Elvis Napitupulu, Elvis Erlinawaty Simanjuntak, Erlinawaty Fadillah, Wahyu Nur Fauzi, KMS. Amin Felicia Eldora Firmansyah Firmansyah Fitri Rahayu Fitria, Nur Anisa Furqoni, Mizta Dwi Hafizah Gultom, Ledy Meva Tiurma Haraha, Melyana Harahap, Muhammad Abarorya Hasratuddin Hasratuddin Ichwanul Muslim Karo Karo Insan Taufik Kana Saputra S Karo, Ichwanul Karo Khoiriyati Azmi Kokod, Mario Maysan Landong, Ahmad Londong, Ahmad Lubis, Mufida Azza Iskandar MANSUR AS Manullang, Sudianto Mutiara Sihaloho, Laura Adelia Natasya, Amanda Nur Hafni Nurfadilah Siregar Nurhasanah Siregar . Refisis, Nice Rejoice Said . Iskandar Sianturi, Josua Siburian, Rulli Prasetio Bane Sihite, Esra Kristiani Silvi, Meutia Simanjuntak, Christina N simorangkir, risna Sinaga, Marlina Setia Siregar, Fadhillah Rahma Siregar, Julya Syahleni Tambunan, M. Ananda Rizki Tarigan, Dewan Dinata Tarigan, Yosua Yosephine Waminton Rajagukguk Wibowo, Adinda Zulfahmi Indra, Zulfahmi