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Unisda Journal of Mathematics and Computer Science (UJMC)
Published by Universitas Islam Darul Ulum
ISSN : 24603333     EISSN : 2579907X     DOI : -
Core Subject : Science, Education,
Computer Science & IT Education Mathematics
Unisda Journal of Mathematics and Computational Science (UJMC) is a research journal published by Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan with the scope of pure mathematics, applied science, education, statistics
Arjuna Subject : -
Articles 129 Documents
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Penerapan Matching pada Graf untuk Pendistribusian Pupuk Bersubsidi dengan Metode Hungarian Eva Wahyu Listyawati; Siti Amiroch; Novita Eka Chandra
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 6 No 01 (2020): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v6i01.2387

Abstract

Increasing yields, demanding each farmer to improve the quality of agriculture, which in turn is expected to increase profits. The purpose of this paper is to determine the allocation of subsidized fertilizer distribution by the distributor of PT. Anak Gresik Raya Kencana and looking for the maximum number of subsidized fertilizer needs distributed in Lamongan district each year so that there is no scarcity and HET (Highest Retail Price) does not increase by applying the hungarian method. In this case, the problem is expressed as a bipartite graph, especially a complete weighted bipartite graph that applies the concept of matching, which is a perfect matching search with maximum weight using the Hungarian method. Matching is said to be perfect if it has fulfilled all the sets of vertices X and Y. Obtained the results of the allocation of subsidized fertilizer distribution by the distributor of PT. Anak Gresik Raya Kencana is Deket sub-district requiring 1220 tons of SP-36, Glagah sub-district requires 3208 tons of Urea, Karangbinangun sub-district requires 483 tons of Organic, mantup sub-district requires 2079 tons of ZA, middle district needs 2233 tons of NPK and fertilizer distribution problems subsidized in Lamongan district can be completed with the maximum amount of subsidized fertilizer needs distributed as many as 9223 tons every year
Implementasi Algoritma Greedy Pada Pewarnaan Wilayah Kecamatan Sukodadi Lamongan Umi Maftukhah; Siti Amiroch; Mohammad Syaiful Pradana
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 6 No 2 (2020): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v6i2.2391

Abstract

Graph theory can be applied in various fields of science such as transportation problems, communication networks, operations research, chemistry, cartography and so on. Graph theory does not only represent structure but in its application, a graph can also be colored. Many problems have graph coloring characteristics such as regional coloring. This regional coloring theory was applied to the map area of ​​Sukodadi District which consists of 20 villages. In this area coloring uses the Greedy algorithm by first making a dual graph consisting of 20 vertices and 43 edges. Based on the results of regional coloring, the minimum number of colors is 4, namely red, blue, green and yellow, with each neighboring village having a different color.
Implementasi Fuzzy C-Means dan Possibilistik C-Means Pada Data Performance Mahasiswa Gadis Retno Apsari; Mohammad Syaiful Pradana; Novita Eka Chandra
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 6 No 2 (2020): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v6i2.2392

Abstract

Students are the most important component in a university, especially private universities especially Universitas Islam Darul ‘ulum (Unisda) Lamongan. One of the most important roles of students for higher education is achievement. This study aims to determine the role of Fuzzy Clustering in classifying student performance data. The data includes GPA (Grade Point Average), ECCU (Extra-Curricular Credit Unit), attendance, and students' willingness to learn. So that groups of students who have the potential to have achievements can be identified. In this case, the grouping of student performance data uses Fuzzy Clustering by applying the Fuzzy C-Means (FCM) and Possibilistic C-Means (PCM) algorithms with the help of Matlab. In the FCM algorithm, the membership degree is updated so as to produce a minimum objective function value. Meanwhile, the PCM algorithm uses a T matrix, which shows the peculiarities of the data which are also based on minimizing the objective function.
Pemodelan Regresi Cox Proportional Hazard Pada Data Perceraian Haykal Abidin; Novita Eka Chandra; Mohammad Syaiful Pradana
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 6 No 2 (2020): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v6i2.2393

Abstract

The purpose of this research is modeling the Cox proportional hazard regression form on divorce data in Pelaihari sub-district, Tanah Laut district, South Kalimantan province. The source of the data comes from the Court Decision in Pelaihari District, Tanah Laut Regency, South Kalimantan. The data analysis technique uses software R with the steps, namely data description, Log-Rank test, checking proportional hazard assumptions, Cox regression model parameter estimation, backward selection with AIC, the best model parameter significance test, calculating Hazard ratio and interpretation of each predictor variable. Based on the results of the analysis and discussion, it was found that for the Log-Rank test, the variable survival time for domestic violence, forced marriage, lying and stories of disgrace differed significantly. While the model that meets the criteria after iteration up to 15 times is the 15th model with the smallest AIC value and p-value <0.05 with factors that significantly influence divorce in Pelaihari sub-district based on modeling results using Cox proportional Hazard regression. are the variables of cheating, gambling, domestic violence, forced marriage, lies, jealousy and disgrace story variables
Analisis Efektivitas Pembelajaran Daring Dengan Pendekatan Kontekstual Terhadap Kemampuan Pemecahan Masalah Matematis Siti Nur Millah; Ali Shodikin
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 7 No 1 (2021): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v7i1.2184

Abstract

Abstract. Online learning is a technology learning model to complement face-to-face (direct) learning. It is hoped that students can still understand what the teacher says even though it is through online media. Learning challenges are a challenge for teachers so that the material can be conveyed properly, especially in the ability of students' mathematical problems. Mathematical problem skills are very useful for students, not only in solving math problems but also solving problems in everyday life. Problem ability is not something that is easily found by students so that students must train to develop this ability. For the ability to develop this, the learning process and strategy that is applied must be able to help understand the problem, plan for problem solving, find solutions and be able to conclude from solving the problem. One learning approach that can make students active in learning is the contextual approach. This experimental research aims to see the effectiveness of bold learning with a contextual approach to students' mathematical problem abilities. This study used a posttest only control group design. The population of this study were all students of class VIII MTs. Son and Daughter of Simo in the 2020/2021 school year. Through probability sampling techniques, classes VIII D and VIII G were selected as research samples. The research data were obtained from the mathematical problem ability test. The results showed that the most effective level in dealing with mathematical problems of students with a bold learning model with a contextual approach strategy was better than conventional learning. Keywords: Mathematical problem solving abilities, contextual approach, online learning. Abstrak. Pembelajaran daring atau online adalah salah satu model pembelajaran berteknologi untuk melengkapi pembelajaran tatap muka (langsung). Diharapkan siswa masih bisa memahami apa yang disampaikan oleh guru walaupun melalui media online. Pembelajaran daring menjadi tantangan tersendiri bagi guru agar materi bisa tersampaikan dengan baik utamanya dalam kemampuan pemecahan masalah matematis siswa. Kemampuan pemecahan masalah matematis sangat berguna bagi siswa, tidak hanya dalam memecahkan masalah matematika tapi juga memecahkan masalah dalam kehidupan sehari-hari. Kemampuan pemecahan masalah bukan merupakan suatu hal yang mudah didapati oleh siswa sehingga siswa harus melatih untuk mengembangkan kemampuan tersebut. Untuk mengembangkan kemampuan tersebut, maka proses dan strategi pembelajaran yang diterapkan haruslah dapat membantu siswa memahami masalah, merencanakan penyelesaian masalah, menemukan solusi dan dapat menarik kesimpulan dari penyelesaian masalah tersebut. Salah satu pendekatan pembelajaran yang dapat membuat siswa aktif dalam pembelajaran adalah pendekatan kontekstual. Penelitian eksperimen ini bertujuan untuk mengetahui efektivitas pembelajaran daring dengan pendekatan kontekstual terhadap kemampuan pemecahan masalah matematis siswa. Penelitian ini menggunakan posttest only control group design. Populasi penelitian ini adalah seluruh siswa kelas VIII MTs. Putra-Putri Simo tahun pelajaran 2020/2021. Melalui teknik probability sampling terpilih kelas VIII D dan VIII G sebagai sampel penelitian. Data penelitian diperoleh dari tes kemampuan pemecahan masalah matematis. Hasil penelitian ini menunjukkan bahwa tingkat efektivitas kemampuan pemecahan masalah matematis siswa model pembelajaran daring dengan strategi pendekatan kontekstual lebih baik dibandingkan dengan pembelajaran konvensional. Kata Kunci: Kemampuan pemecahan masalah matematis, pendekatan kontekstual, pembelajaran daring.
Penerapan Pembelajaran Van Hiele untuk Mendukung Pemecahan Masalah Geometri Aini Masikhah; Wilda Mahmudah; Junaidah Wildani
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 7 No 1 (2021): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v7i1.2447

Abstract

Latar belakang penelitian adalah rendahnya kemampuan siswa dalam memecahkan masalah geometri. Penyebab dari rendahnya kemampuan tersebut adalah kurangnya pemahaman konsep dan keterampilan geometri siswa. Sehingga diperlukan kreativitas guru dalam proses belajar mengajar yang lebih menekankan pada kemampuan siswa dalam pemecahan masalah materi geometri. Model pembelajaran Van Hiele merupakan model yang disesuaikan dengan tahapan berpikir siswa, sehingga tepat diterapkan dalam pembelajaran geometri. Tujuan dari penelitian ini adalah untuk mengetahui keterlaksanaan pembelajaran, respon dan hasil belajar siswa dengan menggunakan pembelajaran Van Hiele dalam rangka mendukung kemampuan pemecahan masalah geometri. Penelitian ini menggunakan jenis penelitian kuantitatif dengan desain penelitian “one shot case study”. Instrument yang digunakan dalam penelitian adalah RPP, lembar observasi, angket respon siswa, dan soal tes pemecahan masalah. Populasi penelitian adalah siswa kelas VIII SMP NU Miftahul Huda Karangrejo dengan sample kelas VIII B. Data yang dianalisis yaitu data lembar keterlaksanaan pembelajaran, angket respon siswa, hasil belajar siswa dan hasil tes pemecahan masalah. Dari analisis data diperoleh bahwa hasil keterlaksanaan pembelajaran Van Hiele terlaksana dengan baik. Respon siswa pada pembelajaran Van Hiele menunjukkan positif. Hasil belajar siswa kelas VIII B SMP NU Karangrejo juga menunjukkan baik. Dan hasil keefektifan menunjukkan bahwa pembelajaran Van Hiele mampu mendukung pemecahan masalah geometri.
Faktor-Faktor Yang Mempengaruhi Nilai Konstruksi Di Indonesia Dengan Regresi Poisson dan Regresi Binomial Negatif Juan Sheptiadi Efendi; Rahmadi Yotenka
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 7 No 1 (2021): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v7i1.2451

Abstract

Abstract. The construction sector is one of the drivers of national economic growth, contributing 10.6% to the National GDP. The capitalization value of the construction sector continues to increase from year to year due to an increase in the industrial sector in the private sector and infrastructure acceleration programs launched by the government in several provinces. However, this has led to a lack of equitable distribution of infrastructure development in several other provinces. To help the government carry out equitable infrastructure development, which can then help the national economy, an analysis is needed to find out what factors affect the construction value of each province in Indonesia. The relationship between the value of the construction and the factors that influence it can be determined by regression analysis. The regression analysis method used in this study is Poisson regression and negative binomial regression. Negative binomial regression is performed specifically to overcome overdispersion in Poisson regression. After the analysis, the results of the factors that have a statistical influence on the value of construction in Indonesia (NK) are the number of workers in each province (JTK) and the number of construction companies in each province (JP) with a pseudo R2 value of 0.978 or 97.8%.
Faktor-Faktor yang Mempengaruhi dalam Menentukan Alokasi Dana Desa di Kecamatan Robiah Adawiyah; Novita Eka Chandra
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 7 No 1 (2021): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

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

Abstract

Village funds are funds originating from the State Revenue and Expenditure Budget which are used for villages through the Regional Revenue and Expenditure Budget. Management of village funds must be transparent and orderly. To determine the allocation of village funds to the total population, the number of poor people, the area of ​​the region and the geographic poverty index. The method used to analyze these factors is multiple regression analysis. From the results of the analysis carried out, it is found that there is a significant influence between the total population, the number of poor people, the area and the geographic poverty index on the allocation of funds.
Sebuah Karakteristik dari Modul Uniserial dan Gelanggang Uniserial I Gede Adhitya Wisnu Wisnu Wardhana; Fariz Maulana
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 7 No 2 (2021): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v7i2.2674

Abstract

The module is a generalization of the vector space. The module that will be discussed is a uniserial module, which is a module that only has one composition series. A uniserial ring is a ring whose module over itself is uniserial. The uniserial ring is an Artin and local ring, but the converse is not necessarily true. In this paper, we will discuss Artin and local ring with additional properties so that it is characteristics of the uniserial ring.
Optimalisasi Jadwal Kegiatan Belajar Mengajar di MI NW I Talun Selama Pandemi Covid-19 Bulqis Nebulla Syechah
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 7 No 2 (2021): Unisda Journal of Mathematics and Computer science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52166/ujmc.v7i2.2714

Abstract

The Covid-19 pandemic has impacted many areas of life, including education in Indonesia. After the Indonesian government implemented a lockdown in a few months, now we are in a new normal era where everyone can do any activity based on the covid-19 protocol. In the new normal era, students and teachers are allowed to do teaching and learning activities with an offline system based on the Covid-19 protocol, this makes the schedule ineffective, such as in MI NW 1 Talun. At this school, each class has a schedule to do learning activities three times a week. Based on this, in this study, the authors will offer a schedule formulated based on variables of teachers, students, classes, classrooms, days and times, and covid-19 protocols. This research method is a genetic algorithm that is a method of optimization based on natural selection. The results of this study show that the new schedule is more effective than before and every student or teacher can do teaching and learning activities to the maximum and avoid covid-19.

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