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Desimal: Jurnal Matematika
Published by Universitas Islam Negeri Raden Intan Lampung
ISSN : 26139073     EISSN : 26139081     DOI : -
Core Subject : Education, Social,
Education Mathematics Social Sciences
Desimal: Jurnal Matematika, particularly focuses on the main issues in the development of the sciences of mathematics education, mathematics education, and applied mathematics. Desimal: Jurnal Matematika published three times a year, the period from January to April, May to Augustus, and September to December. This publication is available online via open access.
Arjuna Subject : -
Articles 310 Documents
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Comic media development to improve students' understanding of comparative concepts Sartika, Dian; Widadah, Soffil; Ayuningtyas, Nurina
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.11172

Abstract

Understanding mathematical material begins with reading, but there are still many students who need reading interest so that it will affect their ability to deal with problems. It is also important to learn mathematics using mathematics learning media. This will motivate students to read the material provided so that students can easily understand it. The purpose of this study is to explain the process and results of developing comics media for comparative material. The development of comic media on this comparison material is to improve students' understanding of the concept of comparison. The quality of this media development is seen from the aspects of validity, effectiveness, and practicality. This research is development research using five stages, namely: Analysis, Design, Development, Implementation, and Evaluation. This research produces a mathematical comic comparison material. The results are: (1) based on the comic media quality assessment for experts, the average score is 4.28 and is included in the very valid classification, (2) based on the results of student learning tests, the media created is declared effective by solving test questions 95% with an average class score of 84.5 and included in the very effective classification, (3) based on the student response questionnaire, the comics media made were declared practical with a total average percentage of 97.2% which were included in the very practical classification. Thus the developed comics media can be used for learning mathematics comparative material.
Daily Profit Analysis: Daily Productivity Scheduling with Multiple Linear Regression Putra, Fredi Ganda; Syazali, Muhamad
Desimal: Jurnal Matematika Vol. 3 No. 3 (2020): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v3i3.11451

Abstract

The purpose of this study was to see which day factors (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday) had the greatest impact on the net income of a store. The method used is a quantitative method using multiple linear analysis. The results show that Monday is the most influential on profits
Students' problem-solving ability: An analytical practice viewed from the aspect of sociomathematical norm Rahma Dini, Disya Futhi; Maarif, Samsul
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.11491

Abstract

This research aims to analyze students’ problem-solving ability in terms of sociomathematical norms. Data was collected using questionnaire sociomathematical norms, ability description tests, and interviews. The total subjects in the research were six students consisting of two students with high sociomathematical norms, two students with moderate sociomathematical norms, and two students with low sociomathematical norms. In this research, there are four indicators, namely understanding the problem, planning the problem, solving the problem, and re-examining the answer. The results showed that subjects who had high sociomathematical norms were able to solve questions on all indicators. Subjects with moderate sociomathematical norms are able to solve problems on the indicators of understanding, planning, and solving problems, but there are errors in the indicators of re-examining. Subjects who have low sociomathematical norms are able to solve problems on the indicators of understanding and planning problems but there are errors in the indicators of solving problems and re-examining.
The effect of memorizing the Quran on students' mathematical logical intelligence asliyah, nur; Ananda, Rusydi
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.11521

Abstract

The purpose of this research is to determine the magnitude of the impact of memorizing the Quran on the logical-mathematical intelligence of students at the Private MTs Al-Jamaiyah Medan in the 2021/2022 academic year. This research is research that uses a quantitative approach and a kind of ex-post research. In this research, there are two variables, the independent variable is the memorization of the Quran and the dependent variable is mathematical logical intelligence. The population in this research amounted to 105 students. The sampling technique used simple random sampling. The data analysis method used was simple linear regression analysis. Guided by the results of data analysis, it was found that there is an effect of memorizing the Quran on mathematical logical intelligence. The value of determination shows that 74.1% of memorizing the Quran affects students' logical-mathematical intelligence and the remaining 25.9% is influenced by other factors
The effect of the course review horay learning model on students' mathematical reasoning abilities Dalimunthe, Anggi Syah Putri; Siregar, Tanti Jumaisyaroh
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.11522

Abstract

Mathematics is a science that is acquired through reason because one of the goals of mathematics education is for students to develop the ability to reason. The purpose of this research is to determine the effect of the Course Review Horay learning model on students' mathematical reasoning abilities. This research is a type of quantitative research. The sampling strategy of cluster random sampling was used to select the sample in this research. The instrument used to collect data is a test of mathematical reasoning abilities in the form of description questions. Normality test, homogeneity, and hypothesis testing with t-test are part of the data analysis approach of this research. Based on the results of the t-test analysis, the results obtained sig. (2-tailed), where the result is 0.000 which is smaller than 0.05. So, it can be concluded that there is an effect of the Course Review Horay learning model on students' mathematical reasoning abilities.
Development of a numeracy literacy ability test instrument based on high order thinking skills (hots) in junior high school mathematics learning Arriah, Fathrul; Romba, Sri Sufliati
Desimal: Jurnal Matematika Vol. 6 No. 1 (2023): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v6i1.11523

Abstract

The aim of this study was to develop a numeracy literacy test instrument based on the High Order Thinking Skills (HOTS) for class VIII junior high school students. The type of research used is research and development (R&D) with the ADDIE model. The ADDIE model consists of five stages of development, namely: Analysis, Design, Development, Implementation, and Evaluation. A total of 15 questions have been prepared covering the material for straight line equations, functions, coordinate systems, linear equations of two variables and number patterns in odd semesters. The items were validated by three mathematicians, and the calculations were analyzed using the Aiken index. Furthermore, the questions that were declared valid were tested on 34 students in two junior high schools in Makassar City using convenience sampling as a sample selection technique. The experimental data are dichotomous. The data were analyzed using KR-20 to produce a reliability coefficient. This study resulted in a HOTS-based numeric literacy test instrument in the form of multiple choice with a total of 15 valid and reliable questions. 15 items have high category validity, while the reliability coefficient of the item is 0.91, or high category.
Analysis of stability and bifurcation in logistics models with harvesting in the form of the holling type III functional response Yulida, Yuni; Nurrobi, Firman; Faisal, Faisal; Karim, Muhammad Ahsar
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.11828

Abstract

The logistic model can be applied in the field of biological studies to investigate population growth problems and some important aspects of the ecological situation. This model is a growth model with a limited population growth rate, and ecologists describe this rate as carrying capacity. Carrying capacity can be interpreted as the ideal population size, where individuals in the population can live properly in their environment. The growth rate of a population can be influenced by the harvesting factor, in this case, it is assumed that harvesting is not constant. The effect of the harvest on the growth rate can be analyzed mathematically by using the Holling type III functional response. In this paper, describe the formation of a logistic model taking into account the effects of harvesting, using the Holling type III functional response. Then,  perform a nondimensional process in the model, namely simplifying a model that has four parameters to a model that only has two parameters. Next, determine the equilibrium point of the model, perform a stability analysis at that equilibrium point, and investigate the possibility of bifurcation. As result, first obtained a logistic model which has two non-dimensional parameters, where one of the equilibrium points is zero and is unstable. Next, determine another equilibrium point through an implicit equation and investigate its stability through simulation. Finally, obtained two equilibrium points, which are fold bifurcation.
An Analysis Genotype Inheritance in a Trihybrid Cross by Applying a Diagonalization of Matrix Method Azis, Dorrah; Syanur, Marsela Nuvela; Amanto, Amanto; Zakaria, La
Desimal: Jurnal Matematika Vol. 5 No. 3 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i3.11955

Abstract

This research aimed to find out the formulation of inheritance to know the genotype of the n-th generation in trihybrid crosses with controlled parent genotypes and analyze them by applying the diagonalization of a matrix. Matrix diagonalization makes it easier to find out the inheritance genotype of the n-th generation in trihybrid to obtain superior offspring compared with crossing it one by one, which requires a lot of time and cost. Based on the analysis, an equation for the probability of inheritance was obtained for 27 genotypes of the n-th generation, and the resulting offspring in an infinite generation are likely to have the TTKKBB genotype.
Group investigation and rotation trio exchange learning model: The impact on students' mathematical problem-solving abilities Dina, Nurul Rahma; Siregar, Tanti Jumaisyaroh
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.12050

Abstract

Mathematics is a basic science that has an important role. So, to achieve the objectives of learning mathematics, mathematical problem-solving abilities are needed. The mathematical problem-solving ability of the students of SMP PAB 3 Saintis at Deli Serdang is still very low. It is suspected that the Group Investigation and Rotation Trio Exchange learning models can improve students' mathematical problem-solving abilities. The purpose of this research was to determine the effect of students' problem-solving abilities taught using Group Investigation and Rotation Trio Exchange. Data collection techniques in this research use tests. The tests carried out were students' mathematical problem-solving abilities (pretest and post-test). The data that has been collected is then analyzed using the validity test, reliability test, normality test, homogeneity test, and t-test. Based on the results of the analysis, it was found that the problem-solving abilities of students taught using Group Investigation were more effective because students using the Group Investigation model had higher learning outcomes with an average score of 83.83 compared to those using Rotation Trio Exchange which obtained an average score of 75.32. Therefore, students' mathematical problem-solving abilities are more appropriate to be taught using Group Investigation rather than Rotation Trio Exchange.
K-means and fuzzy c-means algorithm comparison on regency/city grouping in Central Java Province Latifah, Ummu Wachidatul; Surono, Sugiyarto -; suparman, Suparman
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.12204

Abstract

The Human Development Index (HDI) is very important in measuring the country's success as an effort to build the quality of life of people in a region, including Indonesia. The government needs to make groupings based on the needs of a city/district. To facilitate data grouping based on the similarity of existing characteristics, it is necessary to have a data grouping method, namely the clustering technique. There are several algorithms that are often used in clustering techniques, namely K-Means and Fuzzy C-Means. Each algorithm has advantages and disadvantages. Therefore, in this research, the comparison of the best clustering algorithms will be discussed. The purpose of this research is to compare the K-Means and Fuzzy C-Means algorithms in the grouping of Regencies/Cities in Central Java Province in 2021 based on the Human Development Index (IPM) indicator. The method used is descriptive qualitative. The data used is obtained from the Central Java Statistics Agency, which is in the form of the Central Java Province HDI indicator in 2021 which consists of 35 Regency/City members and has 4 variables, namely Life Expectancy (AHH) (X1), Expectation of School Years (HLS) (X2), Average Length of School (RLS) (X3) and Expenditure Per Capita (X4). The results showed that after a comparative analysis with the standard deviation ratio method, the FCM clustering method was better than the K-Means method. The value of the FCM standard deviation ratio is 0.460093 and the K-Means standard deviation ratio is 0.473601.

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