bluuebunny/crossref_metadata_2025_split huggingface dataset:
Learning geometry of plane and space through Timor Tengah Selatan culture
Authors: Fernandez A J , Fernandez M 
Published: October 2020

Abstract
Mathematics learning is inseparable from local culture. In the local culture in Timor Tengah Selatan regency, there are geometric shapes of plane and spaces contained in local buildings or customs. The habit of measuring gardens. The habit of making roofs and fences is a form of Geometry. This research aims to examine the geometrical shapes contained in traditional houses, LOPO. The research was conducted at Benteng None. The type of this research is qualitative research. The data collection method uses observation and interview techniques. Data were analyzed by data reduction, data presentation, data verification and conclusion. The results showed that there were several Geometry shapes of plane and space at Benteng None, Timor Tengah Selatan Regency.
Mathematical model of coral reefs with fish harvesting effect
Authors: Zikkah R N , Anggriani N , Supriatna A K 
Published: October 2020

Abstract
The degradation of coral reefs is becoming increasingly alarming. If left unchecked, there will be an imbalance of the marine ecosystem. Many factors are killing the coral reefs. There is nature factor such as global warming and human activities factor such as destructive fishing. In this paper, we proposed model coral reefs with a system of the nonlinear ordinary differential equation between five populations, namely coral reefs, parrotfish, macroalgae, algal turfs, and crown of thorns starfish in the Great Barrier Reef, Coral Sea. We consider biological interactions such as predator-prey relationships between the crown of thorns starfish and coral reefs, and macroalgae grazers on coral reefs. We consider destructive fishing that damage the coral. Using the standard dynamic system theory, we determined the stability of the system with and without fishing. We show numerical simulation and sensitivity analysis to evaluate the investigation results to conclude the effect of the destructive fishery on coral reefs.
Developing math games media using scratch language
Authors: Bernard M , Setiawan W 
Published: October 2020

Abstract
Problems faced by students on mathematical problems always occur due to process errors because for those with enough knowledge to memorize formulas, then their job is only to insert numbers in formulas, and in fact, even when they use them they are not able to develop reasonable process stages. The purpose of this media learning, the existence of a strong positive influence they can understand mathematics, able to tune in concepts and be able to evaluate if there are steps in the wrong process then they correct mistakes. This study aims to develop the potential of prospective teachers or students to create ICT-based interactive media in mathematical games, using the ADDIE model of Analysis, Design, Development, Implementation, and Evaluation to see and guide students in making better products. From the results of the study that there is a positive influence when using media based on the average class at pretest 70.74 and post-test 82.69 with paired t-test with a significant value of 0,000 <0.05. and there is also an increase in the ability to solve the context of mathematical problems using the scratch program language based on a decrease in the indicators of student difficulties.
The effect experiential learning model based concrete-pictorial-abstract (EL-CPA) on mathematics attitude of deaf students
Authors: Amril L O , Darhim  , Juandi D 
Published: October 2020

Abstract
Mathematical attitude is a psychological response that arises when students interact in learning mathematics in school. For deaf students, attitudes towards mathematics have an important role in their success in learning mathematics. Deaf students are students who have hearing loss and verbal communication. The experts revealed that the visual potential of deaf students is a potential that can be utilized in mathematics learning activities. One learning model that utilizes the visual potential of deaf students is the EL-CPA model. The research aims to determine the effect of the application of the EL-CPA model on the mathematical attitudes of deaf students in Special Schools. This research is a quasi-experimental study with a sample of 20 deaf students. The sample was chosen randomly from 10 Special Schools in the city of Bogor. Data were analyzed using non-parametric statistics through binomial tests. The results of this study indicate that there is an effect of the EL-CPA model on the mathematical attitudes of deaf students with a Sig value of 0.024. Therefore, researchers recommend applying the EL-CPA learning model for deaf students in special schools.
Students’ understanding of the concept of function and mapping
Authors: Widada W , Herawati A , Fata R , Nurhasanah S , Yanty E P , Suharno A S 
Published: October 2020

Abstract
Function is a concept that is very much related to daily life. Likewise with the concept of mapping. The purpose of this study is to describe students’ understanding of the concept of function and mapping by students who are at a high level (ie extended-trans level). The student is the subject of this study. This research is exploring the ability of research subjects. The research subjects were taken from mathematics education students at Bengkulu University. We selected one subject of research, Mg. Student was interviewed in depth about the concept of function. Data were analyzed based on genetic decomposition. The results of this study are that students are able to present an overview of the concept of function with a broad extension level. The function from the set A to B is the set f whose members are sequential pairs of the two cross-sets of non-empty sets A and B such that (a, b) and (a, b ′) elements of f then b = b′. Also able to make a simplification in the form of mapping definition, which states that the domain of function f is the set A. The conclusion of this study is that high-level students have an in-depth understanding of the concept of function. He is able to compile extensive extensions. Also, make the exact simulations.
Application of geogebra software to improve problem-solving skills in analytic geometry in prospective teachers students
Authors: Sugandi A I , Bernard M 
Published: October 2020

Abstract
This study aims to examine the improvement in thinking skills problem solving of prospective teacher students in learning analytic geometry using GeoGebra software. The population in this study were all students of IKIP Siliwangi, with a sample of class One class 2018 totalling 35 people. The instrument used in this study was a test in the form of a 5-item description question and a non-test in the form of a Likert scale. Based on the results of data processing, it can be concluded that the use of GeoGebra software is effective in improving problem-solving skills in analytic geometry learning. Overall, students’ responses to the use of GeoGebra software in learning analytic geometry courses are in a very strong category. The highest indicator of student attitudes towards the use of GeoGebra software is achieved on the indicator of interest in the media and the indicator that has the lowest percentage lies in the indicator of image use.
Students’ misconception of HOTS problems in teaching and learning of mathematics
Authors: Tanujaya B , Mumu J 
Published: October 2020

Abstract
The purpose of the research was to analyze the opinions of mathematics education students about HOTS questions. The method used in this research was a qualitative research method, using a descriptive approach. The subjects in this study were 21 students, were selected purposively. The data collection instrument is open-ended set of questions using the Google classroom application. Triangulation was conducted through interviews with four lecturers was conducted in order to increase the validation of the research. The results showed that there were two groups of student opinions about the HOTS question; difficult questions and three top-level levels of Bloom’s taxonomy. However, there are misconceptions of the students interpreting difficult problems and Bloom’s taxonomy level about HOTS problems. Not all difficult problems can be classified as HOTS problems, nor all problems on three top-level questions of Bloom’s taxonomy be categorized as HOTS problems.
Development of Comic-Based Mathematics Learning Media on Social Arithmetic Topic
Authors: Saputri R R , Qohar A 
Published: October 2020

AbstractLearning media is a tool to deliver learning material to students during the learning process. This research aims to develop comic-based learning media on the social arithmetic learning material of class VII students. The research trial was conducted at Sunan Kalijaga Jabung Junior High School in class VII C, with a total of 26 students as the research subjects. The development process of the learning media refers to the ADDIE model, which consists of the stages of Analysis, Design, Development, Implementation, and Evaluation. Based on data analysis, the results obtained are as follows: (1) the learning media validity test result shows that the learning media is valid with a percentage value of 85% and the category of “Good”; (2) the effectiveness test result was obtained through the students’ observation sheet and questionnaire with a percentage of 50% < x ⩽ 75% that can be included in the category of “Good”; (3) the practicality test result was obtained through learning observation sheets and student questionnaires. Learning observation sheet with a percentage of 87.5% is included in the category of “Good”, while the students’ responses questionnaire result sheets with a percentage of 91% is included in the category of “Very Good”. Based on those three test results, it can be said that this research has successfully produced a valid, practical and effective learning media.
Application of SEM in analyzing student satisfaction with administrative services
Authors: Hermanto K , Suarantala R , Utami S F , Sudirman S 
Published: October 2020

Abstract
Satisfaction (y), the most basic and latest standard in improving services quality, is influenced by five variables, namely tangibles (x1
), reliability (x2
), responsibility (x3
), assurance (x4
), and emphaty (x5
). In this study, analyzing the satisfaction of Industrial Engineering students at the Sumbawa University of Technology with the administrative services provided by the administration division of the Faculty of Engineering. The analysis is processed using the Structural Equation Model (SEM). From the analysis, we obtained that the variables that can be used to analyze the satisfaction of Industrial Engineering students consist of three variables, namely tangible, reliability, and empathy. Those three variables are simultaneously able to explain the satisfaction variable.
Numbers sequence in batik Jlamprang motif of Pekalongan
Authors: ‘Adna S F , Nasution N B , Mardhiyana D 
Published: October 2020

AbstractThe background of this study is the intention of using Batik Jlamprang motif as a context to teach mathematics in junior high school in Pekalongan. It is known that Batik Jlamprang is an original batik motif from Pekalongan. However, the use of Batik Jlamprang as a context for teaching in school is still rare. Therefore, this study aims to describe the certain mathematical concepts that can be taught by using Batik Jlamprang motif, which is the concept of the arithmetic sequence. We gathered data from the public library and electronic media, and then we observed them. Also, we visited the Museum Batik of Pekalongan to get a broader view of the data. The result of this study shows that the motif of Batik Jlamprang can be used as an introduction about arithmetic sequences but cannot be used to teach the concept of the sum of the first nthterm.
Android-based augmented reality media and the curiosity about mathematics
Authors: Pamungkas T D 
Published: October 2020

Abstract
The rapid development of technology has changed the paradigm of education, especially when technology is combined pedagogically, creating new opportunities to improve the quality of teaching and learning. One of the opportunities to improve the quality of teaching and learning is the use of Augmented Reality. Augmented Reality technology attracts student motivation and curiosity so that students are more active, creative, and have high enthusiasm for learning, specifically mathematics. This study reviews some of the literature regarding information about mobile augmented reality and its implementation in increasing students’ curiosity about mathematics.
Developing teaching materials for Trigonometry in mathematics with realistic orientation using HOTS questions
Authors: Sukendra I K 
Published: October 2020

Abstract
This research aimed to find the learning characteristics, developing procedure of teaching material, and obtain the effectiveness of Trigonometry material in high school level with realistic mathematics education orienting in higher-order thinking skills (HOTS) questions in improving the activity and learning outcome. The type of research used for this was design research. The obtained product was Trigonometry teaching material with valid, practical, and effective quality. The subject of this research was based on the research stages. Its technique of data collecting used purposive sampling. This was conducted in XI class 1 of Science (MIPA) of SMAN 7 Denpasar academic year 2019/2020. This design research included 3 phases, i.e., preliminary research, prototyping, and assessment. The development of teaching material regarding the characteristics in realistic mathematics education orienting in HOTS questions with valid, practical, and effective quality. The learning characteristics: used contextual questions, using various models, students’ contribution, skill, and good behavior. Teaching material with realistic mathematics education orienting on HOTS questions that have been developed was sufficiently effective in increasing the activity and learning outcome of students.
A learning process for early childhood: a case of geometry and numbers
Authors: Efriani A , Zulkardi Z , Putri R I I , Aisyah N 
Published: October 2020

Abstract
The teacher is a parent for young children in school. In maximizing learning in schools, the role of a teacher is needed. This study aims to describe the learning process for childhood by teachers both in plannng, implementatuon, and evaluaton of geometry and numbers. The subjects of this study were 30 teachers from 20 schools in South Sumatra. The method used is descriptive with qualitative and quantitative types. Data were collected using questionnaires and interviews. The results obtained that the implementation of learning undertaken by teachers both in planning, implementation, and evaluation has been carried out in each school. It’s just that the implementation is not optimal. It is because there is no awareness of the teacher about the need for learning tools, learning is still not following the stages of development due to the limitations of the media and the lack of teacher creativity. It requires training as an evaluation of the activities that have been carried out.
Optimal control of diphtheria epidemic model with prevention and treatment
Authors: Izzati N , Andriani A , Robi’aqolbi R 
Published: October 2020

Abstract
Diphtheria is an infectious and deadly disease that spread through droplet transmission. Nevertheless, diphtheria can be prevented by immunization. One of many ways to gain immunity against the disease is by getting a vaccine. Diphtheria vaccine should be given at least three times in one’s lifetime and will be effective if given every ten years. However, the immunization program in developing countries, such as Indonesia, is not optimal yet, and that is one of the causes of the outbreak. Therefore, it is necessary to optimize the immunization program. In this study, we propose a mathematical model to describe the spreading of diphtheria disease. We formulate an optimal control problem on the SEIQR model to minimize the spreading through quarantine and optimize the proportion of vaccinated people through the immunization campaign. Here, we apply Pontryagin Minimum Principle to find the characteristics of the solution of optimal control problems analytically, and DOTcvpSB is used to solve the problem numerically. Based on the analytical and numerical solutions, the optimal control problem constructed could minimize the spread of the outbreak and its cost function.
Exploring the types of a material presentation by teachers in mathematics learning during the COVID-19 pandemic
Authors: Murtafiah W , Suwarno S , Lestari N D S 
Published: October 2020

Abstract
This study aims to explore the types of presentation of material by teachers in learning mathematics during the Covid-19 pandemic. This research is exploratory qualitative because it is used to examine the kinds of mathematics teachers’ learning materials presentation. The data collection used structured interviews through questionnaires distributed by Google forms. Data analysis was performed by reducing, presenting, and drawing conclusions about the types of material presentations by mathematics teachers during the Covid-19 pandemic. The results showed that there were several types of mathematics teachers in presenting material during the Covid-19 epidemic, The results showed that there were several types of mathematics teachers in explaining material during the Covid-19 pandemic, namely: 1) there were three dominant data presentation techniques performed by the teacher, namely uploading material, uploading videos, and asking students to open books/student worksheet, 2) platforms that are effective for presenting material are WhatsApp, Google Classroom, Zoom, and YouTube, 3) learning settings are dominated by independent asynchronous, and 4) effective presentation of material according to the teacher, uploading material with video, multi strategies (using a combination of several platforms), and asking students to open books/student worksheet.
Uno stacko based on realistic mathematics: A developing learning media of trigonometry
Authors: Kusumaningsih W , Buchori A , Cahyono H G 
Published: October 2020

Abstract
This research aimed to develop a media uno stacko mathematics based on a realistic mathematical approach to improve students’ understanding of mathematical concepts. The development model used was ADDIE with the pretest and posttest research designs in the control and experimental classes. The instruments used in this study were documentation, tests, and questionnaires. The analysis showed that students have problems in understanding the concepts and need engaging learning media. Then we think to design a media uno stacko mathematics. After that, media and learning tools that have been made subsequently validated by media experts, material experts, and learning design experts, each of whom with an average validation result in the very high category. In its implementation in the field shows that this media is effectively used for learning by obtaining an average N-Gain in the experimental higher than the control class with a significant difference. Furthermore, the practicality questionnaire showed that the media unomat based on a realistic approach to practical mathematics was used to obtain very good results. Based on data obtained, it was concluded that the uno stacko mathematics media was valid, effective, and practical.
Meta-analysis: google classroom on mathematics learning in Indonesia as an alternative online media during the COVID-19 pandemic
Authors: Etika E D , Patmaningrum A , Yekti S M P , ‘Aini A Z , Perdana R D P 
Published: October 2020

Abstract
The purpose of this study was to determine the research profile consisting of articles related to Google Classroom on mathematics learning in Indonesia. This research is meta-analysis research by conducting research journal studies. The research journals were chosen purposively based on the latest and suitability of the research theme, namely the use of Google Classroom in mathematics learning in Indonesia. This study examines 17 research journals in the last 5 years (2016 - 2020) originating from the Google Scholar database. The instrument in this study was the human instrument, which was the researcher himself who acted as the research instrument. The data collected is a research profile, research objectives, research designs, research instruments, and analysis techniques in research related to Google Classroom on mathematics learning in Indonesia. Analysis of the data used is descriptive qualitative. The results of this meta-analysis show that Google Classroom has a positive impact on mathematics learning in Indonesia.
Improving mathematics learning of geometry through the concrete-pictorial-abstract (CPA) approach: collaborative action research
Authors: Salimi M , Suhartono S , Hidayah R , Fajari L E W 
Published: October 2020

Abstract
The purpose of this research is: 1) describe the steps in the application of the CPA approach, 2) improve mathematics learning through of geometry the CPA approach, and 3) analyze the constraints and solutions of applying the CPA approach. This research is a collaborative classroom action research conducted in two cycles. The subjects were teachers, and students of class IV amounted to 21 students. Data collection techniques using observation, interviews, and tests. The validity of the data uses the triangulation of methods and sources. Data analysis techniques include data reduction, data presentation, and conclusions. The results showed that: 1) the application of the CPA approach to improve mathematics learning about the circumference and width of the flat structure was carried out with the steps of a) concrete, b) pictorial, c) abstract; 2) the application of the CPA approach can improve mathematics learning based on observations and test cycles I and II; and 3) constraints in applying the CPA approach is that the teacher directly demonstrates abstract situation measurement and has not shown modeling of abstract situation measurement to all students, while the solution is to explain examples of abstract situations to students first then explain how to measure abstractly.
Problem-based and thinking talk write learning model, mathematical reasoning, and transformation geometry
Authors: Rozana I , Makmuri M , Hakim L E 
Published: October 2020

Abstract
Several studies on learning mathematics show that students’ reasoning abilities are still low. Students may be more introduced to the use of formulas and memorizing formulas without involving reasoning. This reason is what underlies researchers to conduct research using the Problem Based Learning and Think Talk Write models. This study aims to 1) determine the effectiveness of mathematics learning by using Problem-Based Learning to improve mathematical reasoning abilities, 2) determine the effectiveness of mathematics learning by using Think Talk Write learning to enhance mathematical reasoning abilities, and 3) determine the difference between Problem-Based Learning and Think Talk Write learning models to improve mathematical reasoning abilities. The research method used in this study is quasi-experimental. The design used a pretest-posttest with a randomized control group design. Data collection techniques use test instruments to measure mathematical reasoning abilities and questionnaires to measure student learning interest. The results showed that mathematics learning with Problem-Based Learning model learning is effective in terms of increasing mathematical reasoning abilities. Mathematical learning with Think Talk Write learning models are effective in terms of increasing mathematical reasoning abilities. And, there is no difference between the Problem-Based Learning and Think Talk Write model for improving mathematical reasoning abilities.