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KUBIK: Jurnal Publikasi Ilmiah Matematika
Published by UIN Sunan Gunung Djati Bandung
ISSN : 23380896     EISSN : 26860341     DOI : 10.15575/kubik
Core Subject : Economy, Science, Education,
Computer Science & IT Economics, Econometrics & Finance Mathematics
Fuzzy Systems and its Applications Geometry Theories and its Applications Graph Theories and its Applications Real Analysis and its Applications Operation Research and its Applications Statistical Theories and its Applications Dinamical Systems and its Applications Mathematics Modeling and its Applications Discrete Mathematics and its Applications Computer Mathematics and its Applications Mathematics Actuaria and its Applications
Arjuna Subject : Matematika - Matematika Terapan
Articles 157 Documents
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Traffic Modeling in Serang City Using the Extended Link Transmission Model Rachim, Dimas Kukuh Nur; Pratiwi, B.N.; Syafrizal, R.; Toyibah, Toyibah
KUBIK Vol 9 No 1 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i1.34720

Abstract

In many countries, traffic problem has increased time by time, it has been caused by the increasing amount of vehicle and the lacking of segment road. For the example, urban traffic problem such as traffic congestion has become a big problem for drivers. This research studied urban traffic modeling using the link transmission model (LTM). The method was proposed is mathematical modeling, including car and bus as the objects of research. The cars and buses data were collected directly by the observers at the intersection that has four links and that are connected each other. The simulation process was obtained for the each link at rush hour period. At the interval 6.30-7.30am the total time spend in the link A, B, C, and D were 45.93h, 28.58h, 37.25h, and 19.91h. At the interval 04.00-05.00pm the total time spend in the link A, B, C, and D were 27.38h, 28.58h, 37.25h, and 19.91h. Based on these results, we might to give an advice to control the duration of  traffic lights that controlled traffic flow in the each link. The red traffic light duration of link A at 6.30-730am must be lower than the others so the vehicles at link A will send much better and the TTS will turn down.
Optimasi Produksi Roti Di Grace Bakery Dengan Menggunakan Integer Goal Programming Lumanaw, Joshua Apriano; Mangobi, James Uriel Livingstone; Maukar, Marvel Grace
KUBIK Vol 9 No 1 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i1.35051

Abstract

Grace bakery is a home industry in making bread. The problem experienced by Grace Bakery is that Grace Bakery has not planned to optimize bread production, this has caused losses for Grace Bakery and sales have not been maximized. This research aims to formulate a mathematical model for optimizing bread production using integer goal programming and to obtain optimization results for bread production planning using integer goal programming with the help of the Lingo application. The method used to solve this integer goal programming problem is branch and bound. By using integer goal programming, the branch and bound method and with the help of the Lingo application, the research results show that Grace Bakery must produce 3993 chocolate breads, 1334 cheese breads and 4237 mocha breads every month so that Grace Bakery will earn a maximum income of Rp. 17.280.000. Revenue will reach optimal results if all the bread is sold out and there is no increase in raw materials. Grace bakery can also reduce production costs to Rp. 11.670.092,5 every month.
Model Konvensional Satu Titik untuk Mengoptimalkan Masalah Transportasi Fuzzy Trapesium Mujtaba, A; Syariah, Ai Munirotusy; Patimah, Ain Fitriyani; Wulan, Elis Ratna
KUBIK Vol 9 No 1 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i1.35949

Abstract

Solving fuzzy trapezoidal transportation problem can use a one-point approach to obtain the optimal solution. The one-point method transforms the four points of the trapezoidal number into crisp transportation problems. This method comes with a minimum approach of supply and demand. In the end, these solutions are combined to obtain the optimal solution. The modified distribution is applied to each crisp problem to develop an optimal solution. The presented scheme is compared with competitive methods available in the literature and found to have good coordination with these methods. 
Penerapan Dragonfly Optimization Algorithm (DOA) untuk Menyelesaikan Fixed Charge Transportation Problem (FCTP) Paojiyah, Ai Nuri Siti; Az'zahra, Aliffia Putri; Aulia, Viananda Farisqa; Wulan, Elis Ratna
KUBIK Vol 9 No 2 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i2.35962

Abstract

Transportasi berperan penting dalam kegiatan sehari-hari terutama di dunia industri modern untuk pendistribusian barang atau jasa. Faktor yang mempengaruhi transportasi adalah biaya transportasi, salah satunya biaya tetap. Artikel ini menyelesaikan masalah transportasi biaya tetap atau Fixed Charge Transportation Problem (FCTP) dengan mengimplementasikan Dragonfly Optimization Algorithm (DOA) atau algoritma capung. Metode algoritma capung terinspirasi oleh kecerdasan atau perilaku hidup capung dalam mengetahui jalur optimal untuk mencapai tujuan yang diinginkan. Tujuan dari artikel ini adalah untuk menganalisis tahapan-tahapan pengerjaan algoritma capung berdasarkan masalah transportasi biaya tetap agar dapat meminimalkan biaya transportasi dalam pendistribusian barang. Penelitian dengan menggunakan systematic literature review menghasilkan langkah-langkah algoritma capung untuk FCTP adalah inisialisasi, evaluasi kebugaran populasi awal, menentukan jumlah iterasi maksimum, distribusi solusi ke lingkungan sekitar, menentukan sumber makanan dan musuhnya, solusi terbaik di setiap lingkungan, menjalankan operasi algoritma capung, ulangi hingga jumlah iterasi maksimum terpenuhi, dan kembali ke rencana transportasi optimal.
Investigating Employment Delays: A Multiple Classification Analysis of Job Search Duration among Graduates in Islamic Community Development Afifah, Puspa Nur; Rahmadhani, Nadya; Rifqi, Syehabu
KUBIK Vol 9 No 2 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i2.36256

Abstract

Indonesia is facing big challenges: an overabundance of graduates and limited job prospects. In February 2022, the central statistics agency provided a clear picture, more than 13 million people have a bachelor's degree in Indonesia and the number of unemployed is 8.4 million people. Banten Province is ranked first in the unemployment rate in Indonesia, namely 8.53%. The aim of this research is to determine the factors that influence the length of job search for graduates of the Islamic Community Development Program at UIN Sultan Maulana Hasanuddin Banten. The analytical method used is Multiple Classification Analysis (MCA), this research investigates the influence of variables, such as gender, length of study, GPA, organizational experience, academic achievement, work experience, employment sector, and foreign language proficiency. The research results show that there is a significant relationship between length of study, GPA, work experience, and length of job search. The ANOVA test shows that these three variables have a low significance level (
Penerapan Regresi Binomial Negatif Dalam Menganalisis Faktor-Faktor Yang Mempengaruhi Kasus Angka Kematian Ibu Di Indonesia Hutabarat, Ida Mariati; Kelirey, Rifky Ibrahim; Chairani, Ikfina
KUBIK Vol 10 No 1 (2025): IN PRESS
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Angka Kematian Ibu (AKI) adalah indikator yang menggambarkan jumlah kematian perempuan yang diakibatkan oleh komplikasi selama kehamilan, persalinan, dan masa nifas per 100.000 kelahiran hidup. Penelitian ini bertujuan untuk menganalisis faktor-faktor yang mempengaruhi angka kematian ibu di Indonesia berdasarkan data dari Profil Kesehatan Tahun 2022. Data mengalami overdispersi, sehingga analisis dilanjutkan dengan menggunakan regresi binomial negatif. Penelitian ini mempertimbangkan lima variabel prediktor yaitu Persentase Cakupan Pelayanan Kesehatan (K4), Persentase Cakupan Pelayanan Kesehatan (K6), Persentase Cakupan Imunisasi Td2+ pada Ibu Hamil, Persentase Ibu Hamil yang Mendapatkan Tablet Tambah Darah (TTD), dan Persentase Ibu Nifas yang Mendapatkan Vitamin A. Hasil analisis menunjukkan bahwa Persentase Cakupan Pelayanan Kesehatan (K6) merupakan variabel yang secara signifikan mempengaruhi angka kematian ibu. Nilai Akaike Information Criterion (AIC) dari model ini adalah sebesar 375,75, dengan tiga variabel prediktor yang signifikan. Penelitian ini mengindikasikan bahwa peningkatan cakupan pelayanan kesehatan (K6) berhubungan positif dengan peningkatan angka kematian ibu. Hal ini menunjukkan bahwa peningkatan cakupan pelayanan kesehatan (K6) yang tidak diimbangi dengan kualitas pelayanan dapat berkontribusi pada peningkatan angka kematian ibu. Oleh karena itu, kebijakan kesehatan yang berfokus pada peningkatan cakupan harus disertai dengan peningkatan kualitas pelayanan kesehatan untuk mengurangi angka kematian ibu di Indonesia.
On the Forgotten Index and Jacobson Graphs Associated with Integer Rings Modulo n Jauhari, Mohammad Nafie; Jannah, Shahnaz Latifatul; Turmudi, Turmudi; Nisfulaila, Intan
KUBIK Vol 9 No 2 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i2.39585

Abstract

This paper investigates the connections between the Jacobson graph and the algebraic properties of rings through the analysis of the Jacobson graph of the ring \mathbb{Z}_{3p}, where p is a prime number greater than 3. The Jacobson graph of a commutative ring R is constructed by taking the elements of R, excluding its Jacobson Radical, as vertices, and connecting two distinct vertices if 1 minus their product is not a unit in R. The F-Index is utilized to capture and represent the structural properties of the ring through its associated graph. A detailed examination of the Jacobson Radical, maximal ideals, and vertex degrees in \mathbb{Z}_{3p} leads to the calculation of the F-Index, providing insights into the graph’s connectivity and underlying algebraic structure. This study contributes to the intersection of algebra and graph theory, offering a foundation for further research into more complex algebraic structures.
Analisis Pola Konvergensi Transpor Kelembapan Udara di Indonesia Bagian Barat Menggunakan K-Means dengan Pembobotan Statistik dan Hierarchical Shape-Based Clustering Pratiwi, Asri; Azis, Tukhfatur Rizmah; Fitrianto, Anwar; Erfiani, Erfiani; Jumansyah, L.M. Risman Dwi
KUBIK Vol 9 No 2 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i2.39753

Abstract

This study analyzes the convergence patterns of Vertically Integrated Moisture Transport (VIMT) in the western region of Indonesia using the K-Means method with statistical weighting and Hierarchical Shape-Based Clustering based on Dynamic Time Warping (DTW). Daily data on specific humidity, zonal wind speed, and meridional wind speed from 2020–2023 were used to calculate VIMT. Clustering methods were utilized to identify grouping patterns in moisture transport data. The results showed that moisture convergence significantly increased during the rainy season (November–February). Using the K-Means method, five clusters with clearer separations were obtained compared to the four clusters produced by the Hierarchical Clustering method. Performance evaluation using Silhouette and Calinski-Harabasz scores indicated that the K-Means method was superior, with scores of 0.37 and 104.88 compared to 0.13 and 96.34 for the Hierarchical method. This provides an understanding of the moisture transport patterns, serving as a reference for predicting weather and climate patterns, thereby supporting efforts to mitigate the impacts of extreme weather in Western Indonesia.
ANALISIS PERSAINGAN E-COMMERCE MENGGUNAKAN METODE GAME THEORY DAN MARKOV CHAIN DALAM PENENTUAN STRATEGI PEMASARAN OPTIMAL Rahmadani, Devy; Rakhmawati, Fibri
KUBIK Vol 9 No 2 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i2.40273

Abstract

Dalam dunia teknologi yang terus berkembang, penjualan barang melalui media sosial (e-commerce) sudah banyak dilakukan oleh banyak orang. Platform e-commerce telah menjadi bagian penting dalam perdagangan global. Penelitian ini bertujuan untuk menganalisis persaingan antara Shopee dan TikTok Shop menggunakan metode Game Theory dan Markov Chain guna menemukan strategi pemasaran yang optimal. Penelitian ini menggunakan pendekatan kuantitatif dengan pengumpulan data melalui kuesioner yang disebarkan kepada 82 responden di Kota Medan, Sumatera Utara. Analisis data yang digunakan pada penelitian ini menggunakan uji validitas dan uji reabilitas serta melihat nilai maksimum dan minimum dari data yang didapat. Hasil penelitian menunjukkan bahwa probabilitas pergeseran aplikasi Shopee meningkat selama empat minggu sebesar 0,78 (78%) dimana strategi optimalnya adalah voucher. Sebaliknya, TikTok Shop hanya mengalami peningkatan sebesar 0,22 (22%) dimana strategi optimal berupa promo. Penelitian ini menyimpulkan bahwa strategi pemasaran berbasis voucher dan promo dapat meningkatkan daya saing kedua platform, dengan implikasi signifikan bagi pengembangan strategi pemasaran berbasis data dalam e-commerce.
PARAMETER ESTIMATION AND ANALYSIS OF AVERAGE YEARS OF SCHOOLING IN MERAUKE DISTRICT WITH BIRNBAUM-SAUNDERS DISTRIBUTION APPROACH Langowuyo, Agustinus; Yokhu, Sara; Reba, Felix
KUBIK Vol 10 No 1 (2025): IN PRESS
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v10i1.42992

Abstract

Average years of schooling is an important indicator in assessing the success of education development in a region. This study aims to analyze data on average years of schooling in Merauke Regency, Papua Province, using the Birnbaum-Saunders (BS) Distribution approach. This distribution was chosen because of its ability to model data that has asymmetric characteristics and low variability. The parameters resulting from the analysis include a scale parameter (β) of 8.35, which reflects the average years of schooling of the population, and a shape parameter (α) of 0.0545, which indicates the low degree of dispersion of the data around the mean. The results of the analysis show that the average length of schooling in Kabupaten Merauke is at the junior high school (SMP) level, with a homogeneous data distribution. This homogeneity reflects good equity in access to education, but also indicates the potential for stagnation at certain levels of education. The Birnbaum-Saunders distribution proved to be effective in modeling education data in this region, providing a more accurate picture than traditional approaches. This research makes an important contribution in understanding the distribution pattern of average years of schooling in Merauke district. The results can be used as a basis for designing more targeted policies in improving the quality and access to education, especially at the senior secondary level. In addition, this approach can serve as a reference for analyzing education in other regions with similar geographical and socio-economic challenges

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