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Wiwit Damayanti Lestari
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INDONESIA
M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika
Published by Universitas Wiralodra
ISSN : 25025872     EISSN : 26223627     DOI : -
Core Subject : Education,
Mathline is published by Mathematics Education Department of Wiralodra University. Mathline publishes the research issues on mathematics, mathematics education, and could be experiment, research and development, or classroom action research. This Journal are bi-annual publication, on February and August.
Articles 472 Documents
Collaborative Online Learning Design Through Lesson Study Activities for Mathematics Prospective Teacher Isnawan, Muhamad Galang; Santosa, Farah Heniati; Nurafifah, Luthfiyati; Gunadi, Farid; Mulyana, Diki
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 2 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i2.566

Abstract

The aim of the research was to develop a collaborative online learning design for integral calculus courses through lesson study activities. The study employed didactical design research as the research design. Participants in the research consisted of 19 students (aged 19–22 years, 18 women) from two private universities in Indonesia. The researcher served as the main instrument in the study, utilizing several additional instruments, such as collaborative online learning design, presentation slides, and documentation studies. The data were analyzed using qualitative data analysis. The research revealed that collaborative online learning design through lesson study activities helped prospective mathematics teachers understand concepts related to integral calculus, especially definite integrals and the substitution method. This was because the collaborative online learning design used learning videos as a means for students to understand the concept of integral calculus. Apart from that, the collaborative online learning design also facilitated students’ understanding of this concept more deeply.
Application of The Simplex Method and Digital Literacy in Profit Optimization Problems Taufik Tempe Ambarsari, Ida Fitriana; Hasanah, Nur; Astindari, Tri; Sari, Fadhila Kartika; Masruro, Anisyah Aulia
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.569

Abstract

Resource allocation in the production process are important things that need to be considered to achieve optimal production levels. Production optimization problems are still an obstacle for most businesses operating in the food sector. One of them is the “Taufik Tempe” business which produces tempeh in three different sizes, namely large, medium, and small. The business owner finds it difficult to determine the amount of production according to market demand and minimize production costs for maximum profits. This research aims to solve the profit optimization problem of “Taufik Tempe” with appropriate production allocation to achieve maximum profits. The method used is the method of data collection and data analysis. Data collection methods include field studies (observations and interviews) and literature review. Meanwhile, data analysis uses the simplex method and uses MATLAB software. Data analysis techniques using observation and interviews. Meanwhile, the research results show that the maximum profit per month obtained is Rp 750.000,00 by focusing on producing only large-sized tempeh. Furthermore, by using MATLAB software the same results are obtained as using the simplex method but with a simple, effective and efficient algorithm, ofcourse with precise results and the use of this software aims to avoid calculation errors.
Heterogeneity of Interactive Learning Media Outcomes for Improving Mathematical Competence: A Systematic Literature Review Teapon, Nurhuda; Kusumah, Yaya Sukjaya; Pakaya, Yusril Mahendra; Adjis, Vidia Amalia; Sartika, Rahma Adinda
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.575

Abstract

This study analyzes how using interactive learning media affects math skills in different educational levels: elementary school, middle school, high school, and college. We used the Systematic Literature Review method, looking at 90 studies published between 2014 and 2023. These studies focused on how interactive learning media influences math understanding, problem-solving, communication, representation, and connections. We included all relevant school levels in our research. Our main questions were about how interactive learning media impacts students' math skills, considering factors like the school year, education level, and the number of students. The results of our analysis show a significant increase in research on this topic over the past ten years. Specifically, more studies focused on high school and college students, and larger groups of 30 or more students were common in these studies.
Application of Hotelling T2 Control Diagram to Analyze Drinking Water Quality Control at Perumda Tirtauli Pematang Siantar City Sari, Elviana; Widyasari, Rina
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.578

Abstract

Water is the most important element in supporting human life and other living creatures, where the role of water cannot be replaced by other elements. Various human activities always require large amounts of water to meet their daily needs. People really need good water quality because it has a big impact on health. However, many people complain that the water quality at PDAM Tirtauli Pematang Siantar, the water production they get is less than satisfactory, meaning that the water production at PDAM Tirtauli Pematang Siantar is of poor quality because they have not been able to distribute water production in accordance with the wishes of the community.This study aims to determine the process of controlling the quality of clean water production at PDAM Tirtauli Pematang Siantar with the Hotelling T2 control diagram. T2 hoteling is a multivariate analysis technique used to compare two groups of samples using an average vector, each consisting of two or more variates. The data used in this study is drinking water production data during June-July 2022. Based on the analysis that has been done, it is found that on the T2 hoteling control map, the results show that the drinking water production process at PerumdaTirtauli, Pematang Siantar city is statistically controlled because there are no points that cross the upper control limit or the lower control limit on the T2 Hotelling control map.
Forecasting Indihome Users By Using Trigonometrics, Box Cox, Transformation, Arma Error, Trend, And Seasonal (TBATS) Methods Hutagalung, Alya Azhrah; Sari, Rina Filia
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.579

Abstract

The rapid growth in the use of telecommunication services, particularly IndiHome, has created a pressing need to comprehend and forecast the dynamics of user growth. The swift development of IndiHome services in Pematangsiantar underscores the importance of efficiently forecasting and managing user growth. This research aims to predict future IndiHome users using the TBATS method (Trigonometrics, Box Cox Transformation, Arma Error, Trend, and Seasonal). User data for IndiHome services were obtained from Telekomunikasi Indonesia (Telkom) Pematangsiantar. The collected data underwent analysis and interpolation using the TBATS method. The choice of the TBATS method is attributed to its capability to handle complex patterns of seasonality, trends, and variability in telecommunication service usage data. The TBATS method involves model optimization and model validation using the Mean Absolute Percentage Error (MAPE). The forecasted results for IndiHome users in the next 5 years, with the highest IndiHome users reaching 426,9432, indicate a reasonable forecasting performance. The accuracy of the forecast, as measured by the MAPE calculation, ranges around 30.5%, signifying that the TBATS method demonstrates a satisfactory forecasting capability for IndiHome user data.
Preliminary Research: Development of Digital Student Worksheets Based on Indonesian Realistic Mathematics Education To Improve Deaf Students' Understanding of Mathematical Concepts Boru, Mariana Sanita; Ambarwati, Lukita; Hidajat, Flavia Aurelia
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.584

Abstract

Understanding mathematical concepts is an essential basis for thinking in solving mathematical and real world problems. However, students still do not understand mathematical concepts. The low ability to understand mathematical concepts is not only limited to normal students, but is also experienced by students with special needs, namely the deaf. Therefore, mathematics learning must be focused on improving a person's ability to understand concepts. The aim of this research is to develop Student Worksheets (LKPD) using the Indonesian Realistic Mathematics Approach (PMRI) to improve the ability to understand mathematical concepts for deaf students. The method used is research and development with the ADDIE model (Analysis, Design, Development, Implementation and Evaluation). At the analysis and design stage, data is collected through observation, questionnaires, interviews and tests. Next, the data is processed descriptively and quantitatively. Findings from the analysis results show that one of the subjects considered difficult by deaf students is whole numbers. This is caused by teaching materials that do not suit their characteristics. The results of the test for the ability to understand mathematical concepts show that the average score obtained by students is 53.20 and is categorized as low. Only one in six students meets the minimum completion requirement of 65 set by the school. Therefore, this research can be continued by developing PMRI-based digital LKPD to improve the ability to understand mathematical concepts. This is because the PMRI-based digital LKPD includes various stimuli carried out through various media, such as pictures, readings and videos and the contents of the LKPD have been summarized from several sources and presented using an approach that starts from the context of students' daily lives and continues with mathematics learning. formal. Another advantage is that this LKPD can be accessed at any time so it is easier for students to understand it.
Exploring Numerical Competence: Analysis Of Students' Mathematical Representation Skills in PISA Space and Shape Content Febriyani, Ajda Audita; Setyaningsih, Nining
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.590

Abstract

This research aims to analyze students' mathematical representation skills in solving PISA Space and Shape content questions, taking into account their numerical ab. Mathematical representation is a key skills in understanding and solving mathematical problems, while numerical skills play a vital role in developing an understanding of concepts and their applications in spatial and shape contexts.The research method employed is a qualitative approach, collecting data from students through written tests and interviews. The research instruments include questions reflecting Space and Shape content from PISA, as well as numerical skills tests.The research findings indicate a significant relationship between students' numerical skills and their skills to represent mathematical problems related to Space and Shape. Students with better numerical skills tend to have better mathematical representation skills. Furthermore, these findings can provide insights for educators and researchers to develop teaching strategies that integrate the development of numerical skills and mathematical representation, there by enhancing the quality of students' mathematical understanding at a global level.
Hyothetical Learning Trajectory On Dilation Material Using Realistic Mathematics Education and Geogebra Media Hardiyanto, Dwi; Nursyahidah, Farida; Albab, Irkham Ulil
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 2 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i2.591

Abstract

Dilation is a part of geometry transformation that is useful for students. However, students often have difficulty in understanding dilation material. Therefore, this study aims to develop a learning trajectory to facilitate students in understanding dilation material by using the context of Tedhak Siten tradition. The research subjects consisted of 32 ninth grade students of SMP Negeri 6 Semarang, which was conducted from August to September 2023. The research method used is design research which consists of three stages, namely preparing for experiment, design experiment, and retrospective analysis. All learning activities were based on the Realistic Mathematics Education approach and supported by GeoGebra media. The results of this study include three learning activities, including: observing the Tedhak Siten tradition video to find the properties and definition of dilation, finding the formula and results of dilation, and solving contextual problems related to dilation. From the activities carried out, it can be seen that learning dilation by using the context of the Tedhak Siten tradition based on RME and supported by GeoGebra media can help students improve their understanding of the concept of dilation material in class IX SMP Negeri 6 Semarang. In addition, Tedhak Siten tradition can be used as a relevant context in learning mathematics.
Students’ Thinking Process in Solving HOTS Problem in Derivative Application Materials Pratama, Aditya; Sudirman, Sudirman; As'ari, Abdur Rahman
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 2 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i2.599

Abstract

In every mathematics learning process, it is crucial to identify students' thinking processes to observe and assess their mathematical thinking abilities. One way to comprehend students' thinking processes is by examining their work or their responses to problem-solving test questions. This research utilized Polya's framework, which comprises the four stages of problem-solving. One of the efforts to measure and improve students' problem-solving skills is by giving them High Order Thinking Skills (HOTS) questions.  In this study, the researcher employed a qualitative approach, specifically the case study research type, to explore the thinking processes of students who make mistakes in solving higher-order thinking skills (HOTS) problems. Subjects in this study were collected by submitting HOTS-type questions to eleven 12th-grade students. The researcher chose one student with incorrect answers and with more complete writing than others to be the subjects. The results revealed that the subject engaged in the stages of understanding the problem, planning the solution, and executing the plan, but did not undertake the "looking back" stage. Overall, this study provides insight into the subject's thought process in solving HOTS problems related to derivative application material using Polya's framework.
Meta Analysis: The Effect of The Geogebra Applet-Assisted Discovery Learning Model on Students’ Mathematical Problem Solving Ability in Geometry Material Noverianto, Bebyd; Agoestanto, Arief; Dewi, Nuriana Rachmani; Mariani, Scolastika
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 2 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i2.604

Abstract

Good mathematical problem solving skills are important for students because they are the goals and principles in learning mathematics. However, various studies, both national and international, state that students' mathematical problem solving abilities in Indonesia are still low. The Geogebra-assisted discovery learning model is an innovation that can be used to improve students' mathematical problem solving abilities. This research aims to analyze the influence of the Geogebra-assisted discovery learning model on students' mathematical problem solving abilities in geometry learning. The research method used is meta analysis. The articles analyzed are articles sourced from Scopus, ScienceDirect and Google Scholar with a period of 2013-2023. Of the 10 articles analyzed, 3 of them studied groups of middle school students, 4 groups of high school students, and 3 students. The results showed that 8 articles had a large effect size, 1 article was a medium size, and 1 article was a small size. The results of the Independent Sample t-test obtained tcount of 11.59 and ttable of 1.96. So it can be concluded that the discovery learning model assisted by Geogebra has an effect on students' mathematical problem solving abilities in geometry learning. Through the discovery model, students discover their own concepts and solve the problems. Geogebra is important for illustrating geometric problems. Future research can also analyze the extent of the influence of the Discovery Learning model assisted by Geogebra on students' mathematical problem solving abilities in terms of various other variables both from within the students and from the surrounding environment.

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