Jurnal Fourier http://www.fourier.or.id/index.php/FOURIER <p>Jurnal Fourier is a Scientific Journal that integrates and develops the science of Mathematics and its learning which is integrated and interconnected with Islamic values published since 2012 with the frequency of published 2 times a year with the main language (Indonesian and English) which the reviewer process according to the discipline (Analysis, Algebra, Applied Mathematics, Statistics, and Mathematics Education).</p> Program Studi Matematika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta en-US Jurnal Fourier 2252-763X Protokol Otentikasi Menggunakan Konstruksi Matriks Komutatif Atas Matriks Aljabar Max-Plus http://www.fourier.or.id/index.php/FOURIER/article/view/182 <p><strong>Aljabar max-plus adalah himpunan </strong> <strong>dilengkapi operasi penjumlahan didefinisikan sebagai operasi maksimum dan operasi perkalian didefinisikan sebagai operasi penjumlahan.Konsep aljabar max-plus diperluas untuk membentuk suatu himpunan matriks atas aljabar max-plus.Lebih lanjut himpunan matriks atas aljabar max-plus merupakan struktur semiring non komutatif.Linde dan Puente </strong><a href="#_Referensi"><strong>[1]</strong></a><strong> telah mengkonstruksi suatu matriks yang bersifat komutatif terhadap operasi perkalian pada matriks atas aljabar max-plus, selanjutnyaMuanalifah dan Sergeev</strong><a href="#_Referensi"><strong>[2]</strong></a><strong> menggunakan konstruksi matriks komutatif tersebut untuk diaplikasikan pada kriptografi, yaitu pada protokol pertukaran kunci Stickel. Artikel ini akan mengembangkan protokol pertukaran kunci tersebut menjadi suatu protokol otentikasi. Fungsi protokol otentikasi yaitu untuk memastikan kebenaran identitas pihak pengirim kepada pihak penerima, agar tidak terjadi pemalsuan data pengirim.Penggunaan matriks komutatif atas aljabar max-plus dimaksudkan untuk meningkatkan keamanan protokol otentikasi dari pihak yang hendak menyadap protokol otentikasi tersebut.</strong></p> <p><strong>The max-plus algebra is a set that completed addition operations defined as maximum operations and multiplication operations defined as addition operations. The concept of max-plus algebra is extended to form a matrix set over max-plus algebra. Furthermore, the set of matrices over max-plus algebra is a noncommutative semiring structure. Linde and Puente <a href="#_Referensi">[1]</a> has constructed a matrix that is commutative to multiplication operations on matrices over max-plus algebra, then Muanalifah and Sergeev<a href="#_Referensi">[2]</a> uses the commutative matrix construction to be applied to Stickel key exchange protocol. This article will develop the key exchange protocol into an authentication protocol.The function of the authentication protocol is to ensure the correctness of the identity of the sending party to the receiving party, so that falsification of sender data does not occur. The use of commutative matrices over max-plus algebra is intended to increase the security of authentication protocols from those who want to intercept the authentication protocol.</strong></p> Mufarij Anna Ziaulhaq Muhamad Zaki Riyanto Copyright (c) 2023 Mufarij Anna Ziaulhaq, Muhamad Zaki Riyanto http://creativecommons.org/licenses/by-nc-sa/4.0 2023-10-31 2023-10-31 12 2 51 59 10.14421/fourier.2023.122.51-59 Analisis Sensitivitas Model SEIV pada Kasus Penularan Penyakit Polio http://www.fourier.or.id/index.php/FOURIER/article/view/189 <p><strong>The trend of polio transmission cases until 2023 is still fluctuating and does not tend to decrease monotonically. This incident is important to discuss, especially about the factors that influence cases of polio transmission. One of the studies used to describe the incidence of polio transmission is through mathematical model analysis. One of the mathematical models used to represent the incidence of polio transmission is a dynamic model with the Susceptible-Exposed-Infected-Vaccinated (SEIV) compartment. The SEIV model analyzed in this study involves seven parameters. If the value of each parameter fluctuates, it will affect cases of polio transmission. Therefore, this research aims to analyze the influence of each parameter in the SEIV model on cases of polio transmission. The method used in this research is the literature study method. Secondary data in this study was used to create a SEIV model simulation. The findings of this research are that two parameters have the greatest influence on cases of polio transmission. The infection transmission rate parameter is the most influential parameter in terms of increasing cases of polio transmission because the sensitivity index value is the highest among the other six parameters. Meanwhile, the natural death rate parameter is the parameter that has the most influence on reducing cases of polio transmission. This is because based on the sensitivity index value, the death rate parameter has the lowest sensitivity index value among the other six parameters.</strong></p> Venthy Angelika Joko Harianto Copyright (c) 2023 Venthy Angelika, Joko Harianto http://creativecommons.org/licenses/by-nc-sa/4.0 2023-10-31 2023-10-31 12 2 60 68 10.14421/fourier.2023.122.60-68 Perbandingan Metode Extreme Learning Machine (ELM) dan Kernel Extreme Learning Machine (KELM) Pada Klasifikasi Penyakit Cedera Panggul http://www.fourier.or.id/index.php/FOURIER/article/view/184 <p><strong>Nyeri punggung bawah merupakan sebuah masalah kesehatan yang umum terjadi di dunia dan termasuk penyebab utama kecacatan. Di Indonesia pada tahun 2019 Hernia menduduki peringkat kedelapan penyakit terbanyak dengan jumlah kasus 292.145. Selain Hernia ganguan atau penyakit yang terjadi pada tulang panggul juga disebabkan karena menderita penyakit Spondylolithesis. Penelitian ini bertujuan untuk mengklasifikasi penyakit cedera panggul menggunakan Extreme Learning Machine (ELM) dan Kernel Extreme Learning Machine (KELM). Hasil uji coba terbaik yaitu dengan Nilai akurasi, sensitivitas dan spesifitas yaitu 90.25%, 88.66%, dan 92.22% untuk metode KELM.</strong></p> Siti Nur Aisah Dian Candra Rini Novitasari Yuniar Farida Copyright (c) 2023 Siti Nur Aisah, Dian Candra Rini Novitasari, Yuniar Farida http://creativecommons.org/licenses/by-nc-sa/4.0 2023-10-31 2023-10-31 12 2 69 78 10.14421/fourier.2023.122.69-78 Klasifikasi Penyakit Kanker Payudara Menggunakan Metode K-Nearet Neighbors (KNN) http://www.fourier.or.id/index.php/FOURIER/article/view/192 <p><strong>Kanker payudara adalah jenis tumor ganas yang tumbuh di sel-sel payudara. Kanker payudara dibagi menjadi dua tingkatan yaitu Tingkat jinak dan ganas, pada tingkatan jinak benjolan yang ada di payudara masih bisa mengecil dan hilang, tetai pada tingkatan ganas sudah susah untuk diobati bahkan bisa menyebabkan kematian. Penelitian ini menggunakan metode Klasifikasi K-Nearest Neighbors (KNN) dengan menghasilkan nilai k = 8 dengan akurasi sebesar 77% dan terdapat 62 sampel data yang termasuk dalam kelas positif dan prediksinya benar. Berdasarkan Confusion Matrix, pengklasifikasian kanker payudara ini mendapatkan nilai akurasi sebesar 77%, nilai presisi sebesar 76% dan nilai recall sebesar 71%.</strong></p> Micha Annata Shinami Saiful Bahri Copyright (c) 2023 Micha Annata Shinami, Saiful Bahri http://creativecommons.org/licenses/by-nc-sa/4.0 2023-10-31 2023-10-31 12 2 79 85 10.14421/fourier.2023.122.79-85 I-Spring Suite as an Alternative Media for Algebraic Expression http://www.fourier.or.id/index.php/FOURIER/article/view/197 <p><strong>A The limitation of technology-based learning media available at SMP Muhammdiyah 1 Godean motivate researcher&nbsp; to develop learning media that can supplement alternative media and also assist the difficulty faced by the students, especially in algebraic expression material. This research uses the Analysis, Design, development, Implemnetation and Evaluation (ADDIE) model. The subjects of this research is students of VII grade of SMP Muhammdiyah 1 Godean. Before being trialled into small and large classes, learning media will be validated by material and media experts. The result of the research obtained that the assessment of the material expert obtained 84% and from media expert get 95% with the predicate very feasible. Meanwhile the result of smaal and large trials obtained 83% and 82% who said the mdia was very feasible. So from these result it can be concluded that th learning media developed by researchers are feasible for use. </strong></p> Fatimah Gita Safira Soffi Widyanesti Priwantoro Nur Hidayah Syariful Fahmi Copyright (c) 2023 Fatimah Gita Safira, Soffi Widyanesti Priwantoro, Nur Hidayah, Syariful Fahmi http://creativecommons.org/licenses/by-nc-sa/4.0 2023-10-31 2023-10-31 12 2 86 94 10.14421/fourier.2023.122.86-94