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91	Mathematic Education	ABS-22
Mathematical literacy of the food security context in agriculture vocational high schools Ai Tusi Fatimah, Agus Yuniawan Isyanto, Euis Erlin Universitas Galuh, Jl. R.E. Martadinata No. 150, Ciamis, Jawa Barat, Indonesia Abstract Introducing the importance of food security to agricultural vocational high school students is the foundation for the national food security program. Studies of mathematical literacy that carry a variety of contexts have the potential to include food as part of the context to provide good food security insights for agricultural vocational high school students. The study aims to explore the components of mathematical literacy in the agricultural vocational high school. The study method used is a literature study. The data comes from food security regulations, agricultural vocational high school curricula, assessment and analysis framework of PISA. Data was analyzed based on the components of mathematical literacy, namely knowledge of mathematical content, problem-solving, mathematical reasoning, context, and work skills. The results show that numbers, measurements, algebra, and data analysis are the much-needed mathematical content for problem-solving. The reasoning required to solve a problem can be imitative or creative based on the context of the problem. Food security is very promising to be presented in mathematical assignments. Work skills that can be developed are sense-making, adaptive, and transdisciplinary. Keywords: food security- mathematical literacy- vocational high school Share Link | Plain Format | Corresponding Author (Ai Tusi Fatimah)

92	Mathematic Education	ABS-35
Fostering Numerical and Scientific Literacy through the Development of Adobe Animate: Innovations in Geoscience Education Hafiziani Eka Putri1, a)*, Fitri Nuraeni2, a), Nenden Permas Hikmatunisa3,a), Afridha Laily Alindra4,a), Salis Elmadani5,a), Pitriani6,a) a) Elementary Teacher Education Study Program, Universitas Pendidikan Indonesia, Purwakarta Campus, Jl. Veteran No. 8, Purwakarta 41115, Indonesia. *hafizianiekaputri[at]upi.edu Abstract Students^ numerical and scientific literacy in elementary school, needs to be developed to face the challenges and demand in the 21st century. This ability requires to be trained through learning activities at school. Mathematics and science are two of subjects in elementary school that aim to develop students^ numeracy and scientific literacy. This study aims to develop mathematics and science teaching materials in animate geoscience based on the CPA approach, with the goal of improving elementary students^ numeracy and scientific literacy. This study uses research and development methods, with the procedure following the 4-D model. The 4-D development model encompasses four stages: define, design, develop, and disseminate, which are employed in the creation of mathematics and science teaching materials. The instruments utilized in this study included assessment sheets for teaching materials, evaluated by experts, as well as test items measuring numerical and scientific literacy. The participants of research study were 28 students in fifth-grade from an elementary school. The results showed that mathematics and scientific teaching materials using Adobe animate geoscience based on the CPA approach, could improve students^ numerical and scientific literacy. Thus, teaching materials that developed in this study can be utilized for mathematics and scientific learning in elementary, for future research. Keywords: numerical and scientific literacy, animate geoscience, CPA approach Share Link | Plain Format | Corresponding Author (Hafiziani Eka Putri)

93	Mathematic Education	ABS-43
Analysis of the Ability of High School Students in Solving Proportional Reasoning Problems Ahmad Zulfa Khotimi (a*), Sufyani Prabawanto (a) a) Faculty of mathematics education and natural sciences, Indonesia University of Education. Jalan Dr. Setiabudhi No. 229, Isola, Kec. Sukasari, Kota Bandung, Indonesia *) Ahmadzulfa.21[at]upi.edu Abstract This study aims to obtain a comprehensive description of the ability of high school students in solving proportional reasoning problems. Proportional reasoning was chosen because this ability forms the basis of many mathematics topics, such as understanding fractions, SPLDV, congruence, the concept of scale, and so on. Mastery of this ability can have a positive impact on improving students^ mathematical numeracy skills. This capacity building is expected to contribute to the achievement of SDG^s goals, especially in point 4.6, namely the mastery of literacy and numeracy skills in students. The research design uses a hermeneutic phenomenological approach with qualitative research methods. The research subjects involved in this study consisted of 5 students in one of the high schools in Bandung Regency. The findings in this study indicate that students use the cross-multiplication technique to solve proportional reasoning problems. The use of these techniques tends not to involve students^ proportional reasoning abilities. Other findings also show that students experience difficulties in solving numerical comparison and qualitative reasoning types of problems. In addition, most students use multiplicative relations in non-proportional problems. Based on the various findings above and the results of the study of various references, the findings above occurred due to several factors, namely the lack of variety of types of questions given when learning comparative material. In addition, the questions given are only of comparable and non-equivalent types, as stated in the textbook provided. Keywords: Proportional Reasoning, hermeneutic phenomenology, SDG^s Share Link | Plain Format | Corresponding Author (Ahmad Zulfa Khotimi)

94	Mathematic Education	ABS-45
Acquisition And Improvement Mathematical Communication Ability (KKM) Of Junior High School Students In Construction Materials Who Get Problem Based Learning (PBL) With Geogebra Assistance And Direct Instruction Learning With Geogebra Assistance In View From The Level Of Learning Independence (TKB) Hadi (a*), Dian Usdiyana (a) a) Faculty of mathematics education and natural sciences, Indonesia University of Education. Jalan Dr. Setiabudhi No. 229, Isola, Kec. Sukasari, Kota Bandung, Indonesia *hadi.20[at]upi.edu Abstract Study This aim For analyze acquisition And enhancement Ability Communication Mathematics (KKM) for junior high school students learning material get up room use approach Problem Based Learning (PBL) with help Geogebra and learning Direct Instructions with help Geogebra. Study Also consider factor level independence learning (TKB) students in study impact second the approach. Method research used is quasi-experiment with design pretest-posttest and group control, involve two group treatment. The undergoing group learning with PBL approach with help Geogebra and following group learning Direct Instruction with help geogebra. Student in study this shared based on level independence study them. Data collected through test initial (pretest), implementation learning, and test final (posttest). Data analysis involves comparison between improvement of students^ KKM before and after treatment in second group treatment, as well the effect of TKB on improvement of KKM. Results study show that second approach learning contribute on improvement of students^ KKM on material get up space. Although thus, the group that followed learning assisted PBL approach Geogebra show more improvement significant compared to with group learning Direct Instructions help Geogebra. Besides it is identified that TKB students affect results improvement of KKM, where student with high TKB tend more get benefit from assisted PBL approach Geogebra. In framework improve students^ KKM in learning material get up space, recommended for educator for consider use of assisted PBL Geogebra as well as notice level independence study student in designing strategy effective learning Keywords: Ability Communication Mathematics, Problem Based Learning (PBL), Direct Instruction, Geogebra, Level of Independence Learn (TKB), Wake up Room, Middle School Students Share Link | Plain Format | Corresponding Author (Hadi S.Pd)

95	Mathematic Education	ABS-65
The mathematics in integrated STEM lessons Hazel tan and Gillian Kidman Monash University Abstract This paper describes the hidden understandings of mathematics that can be developed during Science, Technology, Engineering and Mathematics (STEM) lessons. Research indicates that mathematics is often relegated to a secondary supportive role in STEM education lessons. We will explore how mathematics content, mathematical literacy, attitudes, values and dispositions toward mathematics are being promoted in STEM education. The paper considers the routinely taught mathematics via integrated STEM activities. Integrated STEM activities provide rich potential for the teacher to explore the mathematical process-humanity dimensions of mathematical thinking and processes and the mathematical values, attitudes and habits of mind. Examples from classroom research will be used to show how teachers can make mathematics both explicit and implicit when planning and teaching integrated STEM activities. This enables the student to develop a critical mindset while respecting and appreciating others and become independent, social, creative, innovative, and harmonious citizens of the world. Keywords: Mathematics, STEM, values, mathematical thinking Share Link | Plain Format | Corresponding Author (Gillian Kidman)

96	Mathematic Education	ABS-70
MATHEMATICS DIGITAL-WORKSHEETS BASED CREATIVE PROBLEM SOLVING FOR AUDIO VISUAL STUDENTS Ely Susanti (a*), Trisna Wulandari (a), Hapizah (a), Indaryanti (a), Isrok^atun (b), Ruth Helen (a) Simarmata (a) Mathematics Education, Sriwijaya University * ely_susanti[at]fkip.unsri.ac.id (b) Universitas Pendidikan Indonesia Abstract The instructional media can support students with different learning styles with programs complemented by videos, animations, and audio as a stimulus that can be adapted to the needs of students. This study aims to develop a valid and practical mathematics digital-worksheets based creative problem solving for audio visual students and have a potential effect on mathematical thinking skills of students with audio-visual learning styles. The subjects were 6 students who were categorized as audio-visual learning styles from 26 students in grade 8.A at Srijaya Negara Palembang Middle School. This study uses development methods and its procedures consisting of two stages, namely preliminary study, and formative study. The preliminary stage of the study consists of the analysis and design stages, while the formative evaluation stage consists of evaluation and revision. The instruments used to collect data consisted of validation sheets, questionnaires, observations, tests, and interview guidelines. In general, the data analysis used is descriptive qualitative technique. The results of data analysis concluded that the mathematics digital- worksheets based creative problem solving were categorized as valid and practical. From the potential effect, it is obtained that the video makes it easier for students to understand the problem. Leading and demanding questions to find general forms of number patterns are a means for students to make mathematical connections and reasoning. From the results of the answers, it was also obtained that students were able to communicate problems either using pictures, mathematical expressions or in the form of verbal sentences. Keywords: Digital-Worksheets, Creative, Problem Solving, Audio, Visual. Share Link | Plain Format | Corresponding Author (ELY SUSANTI)

97	Mathematic Education	ABS-74
Measurement of student motivation in learning mathematics using a human face expression detector Suprih Widodo- Erna Suwangsih- Srie Mulyani- Hudzaifi Syah Tsalits Taufiqi Universitas Pendidikan Indonesia Abstract Motivation will have an impact on student learning outcomes, either directly or indirectly. Every student has a goal in his activity, so he will have a strong motivation to achieve it. The purpose of this study is to find out students^ learning motivation in photovoices for learning mathematics ^funtastic^ using a human face expression detector and to find out the accuracy of measuring motivation shown by students in photovoices for learning mathematics ^funtastic^ using a human face expression detector. The results of the research show that it produces a series of processes that start from collecting frames in the form of images, which then go through a careful selection process, filtering until the remaining 412 relevant photos are left. After that, the next step involves using the FaceAnalyzer app to identify facial expressions in each photo. The collected data is then processed using the Microsoft Excel application, where the process of recapitulation and analysis is carried out. From this analysis, the average facial expression is calculated in each frame recorded in the photographs. students tend to show neutral expressions during learning activities and produce out of a total of 110 frames analyzed, only 5 frames show an inaccurate level of accuracy, while 105 other frames show accurate results. It is important to note that these results reflect the high quality of the FaceAnalyzer application used in this study. The 95,5% accuracy rate achieved by the application provides a strong indication of reliable and reliable performance in detecting and measuring student facial expressions Keywords: Please Just Try to Submit This Sample Abstract Share Link | Plain Format | Corresponding Author (Suprih Widodo)

98	Mathematic Education	ABS-76
Object Manipulation Design In Augmented Reality For Student Number Sense Development Suprih Widodo- Puji Rahayu Universitas Pendidikan Indonesia Abstract One of the main aspects of learning mathematics in the lower grades is the emphasis on developing sensitivity to numbers. This concept is important because the number sense ability aims to add and develop numeracy skills with numbers as a tool in everyday life (Numeration). to train number sense to students in low grades, Augmented Reality (AR) can allegedly be used because AR is a technology that connects digital content in real-time to a real environment so that it allows users to interact with the system directly. The very rapid development of AR creates progress and opportunities in information technology systems, especially in the world of education. The AR concept offered in this study is an AR concept with a manipulative object design, so it is hoped that it will give an interesting impression and experience for students in developing number sense Keywords: Augmented Reality, Number Sense, Manipulative Objects Share Link | Plain Format | Corresponding Author (Suprih Widodo)

99	Mathematic Education	ABS-77
Development Of Digital Teaching Materials Of Numeration Learning Non-Mathematics-Science Phenomenon-Based For Elementary Schools Puji Rahayu- Suprih Widodo Universitas Pendidikan Indonesia Abstract This research is based on the importance of numeracy skills for elementary school students who still show poor results as shown by the results of the TIMMS and PISA studies. To develop numeracy skills, teaching materials are needed that can provide opportunities for students to gain varied learning experiences, according to the context of life which is usually only associated with mathematics and science. This research is a development of the borg and gall model which aims to develop digital teaching materials for learning numeracy based on non-mathematical-science phenomena, consisting of identification, implementation and evaluation phases. The results of this study are expected to be used by all teachers/lecturers as teaching materials after the Covid-19 pandemic. Keywords: Learning materials, Numeration, Non-mathematical-science phenomenon Share Link | Plain Format | Corresponding Author (Suprih Widodo)

100	Mathematic Education	ABS-79
Development of Super Bee Magic KIT for Math Learning Suprih Widodo- Puji Rahayu Universitas Pendidikan Indonesia Abstract The current practice of learning mathematics in Indonesia is still far from expectations, namely that mathematics is a subject that is considered difficult and a very unpleasant lesson. Elementary school students are often faced with abstract learning. This is suspected because the learning media (KIT) currently used are not innovative and are mostly directed at digital learning which passes through an important stage in learning mathematics, namely through the manipulation of real objects. This research is to develop a super magic KIT for learning fantastic mathematics to be used in elementary schools. Super Magic KIT is used in the introduction of mathematical concepts using the Research and Development Method. The results of this study succeeded in developing the Super Bee Magic KIT for Learning Numbers which is categorized as good and can be used for learning multiplication and addition. Keywords: Super Bee Magic KIT, Matematika, Bilangan Share Link | Plain Format | Corresponding Author (Suprih Widodo)

101	Mathematic Education	ABS-88
Analysis of Learning Loss of Students in Math in Padang Sartono (a*), Retno Triswandari (b), Sahrun Nisa (c), Yetti Ariani (d), Melva Zainil (e), Yullys Helsa (f) a) Primary Teacher of Education, Faculty of Education, Universitas Negeri Padang, Indonesia *sartono[at]fip.unp.ac.id b) Special Education, Faculty of Education, Universitas Negeri Padang, Indonesia c)Primary Teacher of Education, Faculty of Education, Universitas Negeri Padang, Indonesia d) Primary Teacher of Education, Faculty of Education, Universitas Negeri Padang, Indonesia e) Primary Teacher of Education, Faculty of Education, Universitas Negeri Padang, Indonesia f) Primary Teacher of Education, Faculty of Education, Universitas Negeri Padang, Indonesia Abstract Education can make people know everything that was unknown before. One of the essential subjects in education is mathematics. Math is the most challenging subjects to understand. However, the Covid-19 pandemic experienced by Indonesia resulted in the interruption of students^ ability to understand mathematics. As a result, students experience learning loss. This study aimed to determine the level of learning loss of students in Padang. This study used a qualitative research design with a case study type of research. This study used four schools with 120 students in fifth grade as respondents. To determine the level of student learning loss, researchers used a test as a research instrument. There are three topics used in this study, i.e. flat shapes, spatial shapes, and fractions. Based on the results of the analysis of students^ answers, the researcher found that respondents experienced the highest learning loss in fractional material. Students are not able to perform fractional operations perfectly if they find mixed operations in fraction material. In geometric material, respondents are unable to experience learning loss if they find the length of one side of the geometric shape in the form of a fraction. In addition, they are also unable to solve problems with flat shapes if they are asked to determine the length of the sides of a square and a rectangle or the width of a rectangle. Based on the results and discussion, it was concluded that students experienced high learning loss in topics of fractional and geometrical. Keywords: Case Study- Learning Loss- Math- Education Share Link | Plain Format | Corresponding Author (Sartono Sartono)

102	Mathematic Education	ABS-98
Increased Understanding of the Concept of Logarithms through Explanation of Logarithmic Properties with Differentiated Learning Ida Nuraida Universitas Galuh Abstract This research was motivated by students^ lack of understanding in the concept of logarithms, resulting in students not maximizing their understanding of the concept of logarithms. The purpose of this study is to improve students^ understanding of logarithmic concepts through explanation of logarithmic properties with differentiated learning. The sample of this study was taken by purposive sampling from class X high school. The research method uses quasi-experiments. Data analysis used t-tests to see an increase in students^ understanding of logarithmic concepts. The results showed that there was an increase in students^ understanding of the concept of logarithms. Keywords: Differentiated learning, logarithms Share Link | Plain Format | Corresponding Author (Ida Nuraida Nuraida)

103	Mathematic Education	ABS-104
The implementation of Plomp Model Design in Geometry Textbook Development assisted by Dynamics Geometry Softwar Scristia, Meryansumayeka, Muhammad Yusup Universitas Sriwijaya Abstract This research aims to produce textbook on geometry. In addition, this research aims to know the feasibility value of geometry textbook assited by dynamics geometry software . The study using the Plomp development model with four phases: Preliminary investigation, design, realization/construction, and test, evaluation, and revision. Development results show that the feasibility of the material, language, and graphics textbook of geometry obtained the percentage with an average of feasibility 87%. Thus, the textbook of geometry assisted by dynamics geometry software is declared valid so it is feasible for used in learning geometry. Keywords: Geometry, Plomp Model Design, Dynamics Software Geometry Share Link | Plain Format | Corresponding Author (Scristia Scristia)

104	Mathematic Education	ABS-112
How to develop digital content creator skills in prospective teacher students: a literature study Cita Dwi Rosita (a*), Ika Wahyuni (a), Dian Andriyani (a), Yaya S Kusumah (b) a) Universitas Swadaya Gunung Jati Jalan Pemuda 32 Cirebon 45132, West Java, Indonesia *citadwirosita[at]ugj.ac.id b) Universitas Pendidikan Indonesia Jalan Dr. Setiabudi 229 Bandung 40154, West Java, Indonesia Abstract The aim of this research is to explore various studies from articles in international journals on how to develop digital content creator skills in prospective teachers. Along with technological developments and globalization, the use of technology in the field of education is increasingly important and widely used. Multimedia skills and digital literacy are necessary skills for student teachers to prepare themselves to become effective and efficient teachers. This research will provide new views and information about the best way to develop digital content creator skills in prospective teachers. The research method used in this research is literature study to explore various articles in international journals. The data used in this research is data obtained from international journal articles published between 2015 and 2021. This data has been analyzed and organized into several themes based on research objectives. The research results show that developing digital content creator skills in prospective teacher students can be done in several ways. One way is by providing training or workshops on multimedia skills and digital literacy. This training helps prospective teacher students learn the latest technology and skills in integrating this technology in learning. Keywords: Digital Content Creator- Prospective Teachers Share Link | Plain Format | Corresponding Author (Cita Dwi Rosita)

105	Mathematic Education	ABS-143
Penggunaan Software Geoegebra dalam Pembelajaran Dimensi Tiga Reina Anjeliani (a*), Scristia (b), Meryansumayeka(c), Muhammad Yusuf (d) Sriwijaya University (a,b,c,d) Abstract Students have difficulty understanding three-dimensional material. This is because students cannot visualize the three dimensions well. Therefore, geogebra software assistance is needed in learning three-dimensional material. The aim of this research is to describe the learning process and student learning outcomes. The research subjects in this study were 32 class XII students from one of the Senior High Schools in Palembang. This research is included in qualitative descriptive research. The data collection techniques in this research are tests and interviews. Based on the research results, it is known that the learning process starts from conveying learning objectives, discussing previous material, distributing LKPD to students, directing students to use Geogebra, students working on LKPD in groups, discussing the results of working on LKPD, and provide feedback from the learning carried out. From the test results, it was found that student learning outcomes had improved and Geogebra software could be used on three-dimensional material. Keywords: Learning- Three Dimensions- Geogebra- Learning Outcomes. Share Link | Plain Format | Corresponding Author (Reina Anjeliani)

106	Mathematic Education	ABS-144
PEMBELAJARAN MATEMATIKA DENGAN MEDIA SOFTWARE CABRI 3D MATERI GEOMETRI BIDANG DATAR Katwan Nurwahyuni, Scristia, Meryansumayeka, Muhammad Yusuf Sriwijaya University Abstract Geometri bidang datar merupakan salah satu materi yang cenderung sulit. Salah satunya upaya untuk mengatasi kesulitan tersebut yaitu dengan menggunakan bantuan media pembelajaran yang tepat seperti Software Cabri 3D. Penelitian bertujuan mendeskripsikan proses pembelajaran dan hasil belajar matematika menggunakan software Cabri 3D. Penelitian deskriptif kualitatif ini terdiri dari 36 subjek siswa kelas XII IPA salah satu SMA di Palembang. Instrumen penelitian yaitu tes tertulis dan wawancara. Berdasarkan hasil penelitian diketahui bahwa proses pembelajaran dengan media software Cabri 3D diawali dengan menyampaikan tujuan pembelajaran dan mengingatkan materi sebelumnya, menjelaskan megenai unsur-unsur geometri bidang datar, memperkenalkan software Cabri 3D, menjelaskan fungsi masing-masing menu, menjelaskan materi geometri bidang datar menggunakan software Cabri 3D dan memberikan penguatan serta menyimpulkan inti materi yang telah dipelajari. Hasil penelitian menunjukkan bahwa terdapat perbedaan hasil belajar siswa yang signifikan antara sebelum dan sesudah penggunaan software Cabri 3D. Software Cabri 3D cocok digunakan untuk membantu siswa memahami materi geometri bidang datar dengan baik. Keywords: Hasil Belajar Matematika, Pembelajaran Matematika, Geometri Bidang Datar, Software Cabri 3D Share Link | Plain Format | Corresponding Author (Katwan Nurwahyuni)

107	Mathematic Education	ABS-146
LEARNING MATHEMATICS TRIGONOMETRY WITH GEOGEBRA SOFTWARE MEDIA TRIGONOMETRY MATERIAL Dhea Riski Aprilianty, Scristia, Meryansumayeka, Muhammad Yusuf Sriwijaya University Abstract Trigonometry material is one of the difficult materials for students. This of course needs to be overcome by using learning media such as Geogebra software. The research aims to describe the learning process and mathematics learning outcomes using Geogebra software on trigonometry material. The subjects of this qualitative descriptive research were class XI students of SMA Srijaya Negara Palembang using test sheet and interview instruments. The learning begins with conveying the objectives and reviewing previous material related to trigonometry, introducing Geogebra software, explaining trigonometry material using Geogebra software, and providing reinforcement and conclusions from the learning. Based on the research results, it shows that there are differences in student learning outcomes between before and after using Geogebra software in trigonometry material and Geogebra software can be used in trigonometry material. Keywords: mathematics learning outcomes- mathematics learning- trigonometry- Geogebra software Share Link | Plain Format | Corresponding Author (Dhea Riski Aprilianty)

108	Mathematic Education	ABS-173
ACE CYCLES AS A TEACHING AND LEARNING STRATEGY TO IMPLEMENT COMPUTATIONAL THINKING COMPONENTS IN RING THEORY COURSE Elah Nurlaelah, Jarnawi Afghani Dahlan, Dian Usdiyana Mathematics Education Study Program- FPMIPA Universitas Pendidikan Indonesia Abstract Computational Thinking (CT) is an ability that needs to be mastered by the younger generation in facing the 5.0 era. Therefore, CT skills need to be provided to student teachers (mathematics) who will educate students who will fill the 5.0 era and the Golden Indonesia era in 2045. CT skills are implemented through the ACE cycle which was a learning cycle used in the theoretical framework APOS. The research method was used qualitative method with case studies. The research was conducted on prospective Mathematics teacher students in the Ring Theory course in the Mathematics Education Study Program at a University in the city of Bandung. The instrument used were the Student Worksheet (LKM) which contains the CT stages and post tests which are used to see the use of CT components in solving questions. The research results show that based on the results of the implementation of the use of teaching materials (LKM) in the Ring Theory course, it was found that students tend more easier to solve problems (questions) or prove theorems in the Ring Theory course. This happens because students are used to solving proof problems based on the stages or components of computational thinking. Meanwhile, based on the post-test results obtained, 70% of students were able to solve the post-test questions using the CT component/stages Keywords: Computational Thinking Components, ACE Cycle, APOS Theory, and Student Worksheets. Share Link | Plain Format | Corresponding Author (Elah Nurlaelah)

109	Mathematic Education	ABS-180
ETHNOMATHEMATIC STUDY OF HYPOTHETICAL GEOMETRIC STRUCTURES/SHAPES OF MEGALITHIC SITE OF GUNUNG PADANG Turmudi, Dadang Juandi, Yullys Helsa, Edi Supriadi, and Abdul Latip Mathematics Education 1. UPI 2. UPI 3. UNP 4. UPI 5. UPI Abstract This research is ethnographic qualitative research, involving stakeholders and communities around the Gunung Padang site in Cianjur, West Java. Information mining is directed at how stakeholders in the Gunung Padang site treat and perceive the existence of Megalithic Buildings in the Gunung Padang Site. Apart from that, public perception and literacy studies related to the shape or geometric structure of the Gunung Padang Site, were excavated to obtain a complete understanding of the site. Furthermore, triangulation of good data obtained through interviews, ethnography, interaction in the implementation of observations, as well as literary data is needed to obtain perfect information in order to build a Hypothetical Geometry Structure of the Gunung Padang Site. Data were collected, and qualitatively were analyzed include interview data, observation data, field notes data, participant observations data, and the data of aerial photography using drones. All these data are used for triangulation so that the data will reinforce each other and then written in the form of scientific publications. The research results indicate that Gunung Padang site was structure of ^punden-berundak^, the place in which in ancient times was used as a place for worship by the community. This geometrical form of a structure does not resemble as a pyramid, but more like a pile of stones that includes terraces and piles. Keywords: ethnomathematics hypothetical geometrical structure megaliticum site gunung padang Share Link | Plain Format | Corresponding Author (Turmudi PhD)

110	Mathematic Education	ABS-181
Mathematical literacy and TPACK in HOTS-oriented mathematics learning Nur Eva Zakiah (a*), Sri Solihah (b) Universitas Galuh, Jl. R. E Martadinata No. 150, Ciamis 46274, Indonesia Abstract This research aims to describe a higher order thinking skills (HOTS) oriented learning design by integrating mathematical literacy and technological pedagogical and content knowledge (TPACK). This article is a literature review. The use of HOTS aspects (transfer of knowledge, critical thinking and problem solving) in learning can be done by applying: active learning, analyzing, evaluating or creating skills, dimensions of knowledge (conceptual, procedural or metacognitive), 21st century skills (creativity, thinking critical, collaboration, and communication), as well as using media and learning resources with technology. The results of the study show that HOTS-oriented learning design by integrating mathematical literacy and TPACK can be used as an innovation in learning that is in line with current curriculum demands, namely: (1) integrating TPACK and mathematical literacy, teachers can design lessons that integrate mathematical literacy with technology and effective teaching methods- (2) integrating TPACK and HOTS oriented learning, selecting the right technology and teaching strategies, teachers can design lessons that encourage students to think critically and creatively- (3) integrating mathematical literacy and HOTS oriented learning complement each other. By understanding mathematical concepts and how to apply them, students can develop their higher order thinking skills. Keywords: Content knowledge- HOTS, Mathematical literacy, Pedagogical knowledge, Technology knowledge Share Link | Plain Format | Corresponding Author (Nur Eva Zakiah)

111	Mathematic Education	ABS-183
DIGITAL TEACHING MATERIALS FOR THREE DIMENSIONAL MATERIALS TO IMPROVE STUDENTS^ MATHEMATIC SPATIAL ABILITIES Dede Fajriadi (a*), Nur Eva Zakiah (b) (a*) SMKN 1 Panumbangan, Jl. Raya Panumbangan No.443, Sukakerta, Ciamis 46263, Indonesia (b) Universitas Galuh, Jl. R. E Martadinata No. 150, Ciamis 46274, Indonesia Abstract This research aims to describe the increase in students^ mathematical spatial abilities after implementing digital teaching materials in three-dimensional material. The digital teaching material used in this research is the GeoGebra Book. This research is quantitative descriptive research with 28 class XI students at one of the Ciamis Regency vocational high schools as research subjects. The research instrument consisted of a mathematical spatial ability test and a student response questionnaire. Analysis of mathematical spatial ability test data uses the Gain Normalization test, while analysis of student response data uses the rating scale calculation formula. Based on the research results, it was found that: (1) there was an increase in students^ mathematical spatial abilities in three-dimensional material after using GeoGebra Book by 0.57 with the interpretation of a moderate increase- and (2) students^ responses to the GeoGebra Book on three-dimensional material are in the good category. Keywords: Digital teaching materials, GeoGebra Book, Learning media, Three dimensions Share Link | Plain Format | Corresponding Author (Dede Fajriadi)

112	Physic	ABS-30
The Application of Machine Learning Algorithms on Triaxial Passive Seismic Data to Identify The Geological Location of The Signal Source Muhammad Randy Azhari, Bagus Mahendro Wibowo Adhi, Evi Fazriati, Yudi Rosandi (*). Department of Geophysics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung Sumedang km. 21 Jatinangor, Kab. Sumedang, Jawa Barat, Indonesia. *rosandi[at]geophys.unpad.ac.id Abstract The characteristics of ground vibration are determined by the local geological and physical conditions of the Earth. Such vibrations can be detected using the passive seismic measurement. This research aims to create an advanced signal processing program to classify the local characteristic of ground vibration signals, applying the machine learning techniques, specifically the Convolutional Neural Network. The research process involved data acquisition, data preprocessing, model creation, model training, and model testing. Data acquisition was performed using a triaxial seismometer. The acquired data was converted into image representations in the form of axial spectrograms. The training data was divided into three directional components. The training process consists of two steps namely the component identification step and classification step. For the component identification we obtained accuracy of 87.8%. Whereas, for the classification step we obtain 90.8% using the horizontal model and 95.3% using the vertical model. Based on the confusion matrix evaluation, the model achieved an accuracy of over 85% in the overall classification. Furthermore, in the testing process correct classifications that matched the labels in all experiments was achieved. This work demonstrates the capability of classifying the local characteristic of ground vibration signals by means of the Convolutional Neural Network algorithm. Keywords: Machine Learning, CNN, Microtremor, Geological Classification Share Link | Plain Format | Corresponding Author (Muhammad Randy Azhari)

113	Physic	ABS-36
Computational Study of the Effect of rGO Addition to Co-Doped LaFeO3 on Ethanol Gas Molecule Adsorption Energy Using Density Functional Theory for Gas Sensor Application Alta Ridho Anugrah, Endi Suhendi, Andhy Setiawan Program Studi Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Indonesia Abstract LaFeO3 (LFO) material has been widely used as a gas sensor construction material. Although LFO has been widely applied to gas sensors, the selectivity and sensitivity as well as the working temperature of gas sensors are still not optimal. The LFO in this study was Co-doped and also coated with single layer rGO to analyze its sensitivity and selectivity based on adsorption energy using Density Functional Theory (DFT). Based on this research, it was found that the presence of Co doping and rGO coating could increase the adsorption energy on the LFO. The addition of the rGO layer to the LFO increased the adsorption energy by 23.58% from -2.38 eV for Co-doped LFO to -2.93 eV when rGO was added. This shows the potential of adding rGO layers to LFO materials for sensor materials. Keywords: LaFeO3, Cobalt, gas sensor, ethanol, reduce graphene oxide, density functional theory Share Link | Plain Format | Corresponding Author (Alta Ridho Anugrah)

114	Physic	ABS-58
Influence of Lateral Size of Hexagonal Gold Nanoparticles on Enhancing Localized Surface Plasmon Resonance Signal for Albumin Detection Silva Nurfasha (a), Chandra Wulandari (b),Ahmad Aminuddin (a), Budi Mulyanti (c), Roer Eka Pawinanto (d), and Lilik Hasanah (a*) (a) Physics Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Jawa Barat, Indonesia (b) Doctoral Program of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia (c) Electrical Engineering Education Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Jawa Barat, Indonesia (d) Industrial Automation and Robotics Engineering Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Jawa Barat, Indonesia Abstract The kidney organ in humans has a very important role. The damage of kidney will cause the filtering of waste fluids in the body to be disrupted and will cause health complications. Damage to the kidneys is detected by the presence of albumin protein in the urine. Damage to the kidneys can be detected from albumin level, because this protein should be filtered in the kidneys but can be carried in the urine. The use of localized sensor plasma resonance (LSPR) in the field of biosensors to detect albumin protein in urine is the latest breakthrough in the medical field. By using FDTD simulation, the lateral size of hexagonal gold nanoparticles (AuNPs) is varied to increase the optimal LSPR. In several studies, gold material has been the most sensitive material for the use of LSPR. Hexagonal AuNPs were chosen because they can increase the surface area and enhance the LSPR signal. Varying the geometry of the hexagonal AuNPs will affect their sensitivity and optical properties. The lateral size of the hexagonal AuNPs varied from 10 nm to 60 nm, with a constant thickness of 30 nm. The absorption graph shifts towards the left and also decreases until the graph has almost no peak as the lateral size decreases. This effect is then analyzed to determine the optimum geometry of hexagonal gold nanoparticles. Optimization of the geometry of hexagonal AuNPs in this study is expected to significantly improve the performance of LSPR-based sensors for albumin detection. Keywords: LSPR, hexagonal, gold nanoparticles, albumin, FDTD Share Link | Plain Format | Corresponding Author (Silva Nurfasha)

115	Physic	ABS-59
FDTD-based Simulation to Determine the Optimal Length of Gold Nanorods in Localized Surface Plasmon Resonance-Based Creatinine Sensors Ahmad Ihsan Nur Solehudin (a), Chandra Wulandari (b), Ahmad Aminuddin (c), Yanurita Dwi Hapsari (d), Budi Mulyanti (e), Roer Eka Pawinanto (f), and Lilik Hasanah (a*) (a) Physics Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Jawa Barat, Indonesia (b) Doctoral Program of Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia (c) Electrical Engineering Education Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Jawa Barat, Indonesia (d) Industrial Automation and Robotics Engineering Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Jawa Barat, Indonesia Abstract Creatinine is a byproduct of muscle metabolism that is excreted by the kidneys. Elevated levels of creatinine, also known as hypercreatinemia, can increase the risk of kidney failure. It is a measurable substance in the blood, often used as a diagnostic test to assess kidney function. The application of Localized Sensor Plasmon Resonance (LSPR) in biosensors for detecting creatinine in urine represents a revolutionary development in the medical field. LSPR has the ability to detect molecular-level changes with high sensitivity, enabling rapid and accurate detection of various biomolecules. Using the Finite-Difference Time-Domain (FDTD) method, we designed gold nanoparticles in the form of nanorods due to their precisely adjustable shape and size, allowing for better control of resonance wavelength. In this study, we optimized the LSPR signal by varying the length of the gold nanorods from 40 to 150 nm. The results obtained showed that as the nanorod length increased, the absorption spectrum shifted to the right and increased. The performance of the optimal gold nanorods from this study will be subsequently simulated for the detection of creatinine at various concentrations. It is anticipated that the gold nanorods-based biosensor will exhibit superior sensitivity and limit of detection. Keywords: LSPR, gold nanorods, FDTD, creatinine, optimize length Share Link | Plain Format | Corresponding Author (Ahmad Ihsan Nur Solehudin)

116	Physic	ABS-100
Magnetic Susceptibility and Heavy Metal Content of Sediments in the Upstream Citarik River Kartika Hajar Kirana(1,2)*, Rifky Darmawan(1), Mileani Shafaria(1), Dini Fitriani(1,2), Eleonora Agustine(1,2), Yudi Rosandi(1) (1)Department of Geophysics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Ir. Soekarno Km. 21, Jatinangor 45363, Indonesia (2)Centre of Citarum Research, Jl. Dipatiukur No. 46 Bandung, Indonesia Abstract The Citarik River is one of the Citarum sub-watersheds that originates in the Kareumbi Masigit Forest Conservation Area, Sumedang Regency. The number of human activities around the upstream Citarik River can affect the quality of water and sediment. To identify the anthropogenic effect, we conducted measurements of common parameters to determine water and sediment quality, namely EC (Electrical Conductivity), TDS (Total Dissolved Solids), and pH. Thus, to analyze the characteristics of sediment, we used magnetic susceptibility measurements, heavy metal content tests, Scanning Electron Microscopy (SEM), and Energy Dispersive X Ray Spectroscopy (EDS) tests. The results showed that the hydrological parameter values of sediment were still at a predetermined threshold except for pH at several locations. The results of low frequency magnetic susceptibility around (1308.696 to 3071.020) x 10-8 m3/kg while the frequency dependent magnetic susceptibility values around (0.955 to 2.405)%. Those values have a negative correlation which indicates that the sediment sample has been affected by anthropogenic materials. This is supported by heavy metal test results where almost all elements pass the specified threshold. Furthermore, there is a positive correlation between magnetic susceptibility and heavy metals originating from human activities and the results of the SEM and EDS test indicate the presence of a mineral with a spherule shape where the mineral with that shape is a mineral from anthropogenic activity. Keywords: Citarik River- magnetic susceptibility- heavy metal- anthropogenic Share Link | Plain Format | Corresponding Author (Kartika Hajar Kirana)

117	Physic	ABS-125
Physicochemical properties of river water and sediments for environmental assessment: A case study of Cikuda River and Cikembang River, Purwakarta) Dini Fitriani, Syafira Ayu Wienarti, Kartika Hajar Kirana, Eleonora Agustine Department of Geophysics, FMIPA, Universitas Padjadjaran Abstract The entry of additional materials into rivers, such as heavy metals and magnetic minerals. could change river environmental conditions. The materials, known as anthropogenic materials, could be derived from human activities, including domestic and industrial activities. The presense of anthropogenic materials could affect physicochemical properties of river water and sediments. In this research, we have examined pH, Total Dissolve Solid (TDS) and Electrical Conductivity (EC) of water from Cikuda River and Cikembang River, Purwakarta, West Java, as well as magnetic susceptibility measurement of river sediments. The research was integrated with Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) analysis of magnetic-extracted sediments samples. The results showed that the river water had EC values within the specified international criteria for water quality. However, river water at a number of sampling points were found to have pH and TDS higher than the standard criteria. Magnetic susceptibility of sediments (X??) was in the range of 512.9 - 2471.2 (x10-8 m3kg-1), inferring the domination of ferrimagnetic minerals in sediment. The calculated frequency dependent parameter or XFD (%) was below <4%, indicating anthropogenic-derived magnetic minerals. Electron microscopy images show the imperfect octahedral and spherules shapes of magnetic grains that supports magnetic susceptibility analysis about the anthropogenic source of magnetic minerals. Elemental composition from EDSS analysis showed Fe and O as main elements, including numerous minor elements such as Cd, Cu, Mg and Cr Keywords: magnetic susceptibility, sediments, anthropogenic materials, Cikuda and Cikembang River Share Link | Plain Format | Corresponding Author (Dini Fitriani)

118	Physic	ABS-136
IDENTIFICATION OF HEAVY METAL Cu AND Cr ON PADDY FIELD AFFECTED FROM WASTE OF TEXTILE INDUSTRY BASED ON VALUE OF ELECTRIC CONDUCTIVITY: Case Study Jelegong Village Rancaekek Subdistrict Eleonora Agustine1, Dewi Gusti Nur Anesta1, Dini Fitriani1, Kartika H Kirana1, Yudi Rosandi1, Muhammad Amir Solihin2, Anne Nurbaity2, and Silvia Jannatul Fajar3, Wahyu Srigutomo4 1Geophysics Department, Faculty of Mathematic and Natural Sciences, Universitas Padjadjaran, Jl.Raya Bandung-Sumedang Km.21, Sumedang, West Java, Indonesia 2Soil Science Department, Faculty of Agriculture, University of Padjadjaran, Jl.Raya Bandung-Sumedang Km.21, Sumedang, West Java, Indonesia 3Global Geophysics Research, Faculty of Mining and Petroleum Engineering, Institute Technology Bandung, Jl. Ganesha No.10, Coblong, Bandung, West Java, Indonesia 4Physics Department, Faculty of Mathematic and Natural Sciences, Institute Technology Bandung, Jl. Ganesha No.10, Coblong, Bandung, West Java, Indonesia corresponding author: eleonora.agustine#[at]unpad.ac.id Abstract Detection of Cu and Cr heavy metals contents in wetland areas exposed by textile industry waste based on electrical conductivity value has been done in Jelegong Village rice field, Rancaekek subdistrict, Bandung regency, West Java. This research location is an active rice field with the surrounding area that has undergone a transformation of land conversion from an agricultural area to a factory and industrial area. The condition affects the local environmental quality, especially the indication of soil pollution containing dangerous heavy metal elements. Soil contamination can be identified from changes in the character or nature of the soil, one of which is the nature of the soil^s electrical conductivity and the soil^s chemical content (containing heavy metals). The research was conducted to find the distribution of soil conductivity value using HUMA EC-01 and supporting data using the AAS (Atomic Absorption Spectrophotometry) method. Measurements were carried out on dry fields with a 5 x 5-meter wide land area, seven lines, and five ground point sampling. The results showed that conductivity values varied from 0.12 to 11.25 mmhos/cm. The conductivity data is supported by heavy metal content data, which is high above the critical limit of> 2 ppm. The content of heavy metals Cu (copper) reached 4-4,7 ppm, and heavy metal Cr (chromium) as much as 7-51 ppm. The correlated research data strongly indicates that the indication of wetlands in the research location is conducive to the high pollution level above the critical limit. Keywords: paddy fields, heavy metal, pollution, electrical Conductivity Share Link | Plain Format | Corresponding Author (Eleonora Agustine)

119	Physic	ABS-142
The Modeling of 2D DC Resistivity Measurement Responses for Anomaly-Parallel Profiles. Imran Hilman Mohammad Departemen Geofisika, Universitas Padjadajaran Abstract In general, optimal DC Resistivity measurements are made on the line perpendicular to the direction of the anomaly. However, sometimes topographical and environmental constraints can led to non ideal condition and measurements are carried out parallel to the anomaly direction. Interpretation of optimal results for these non-ideal conditions requires modeling in order to see the response of the resulting measurements. This paper discuss the finite difference-based 2D DC resistivity responses modeling for the anomaly parallel to the line of acquisition. Variations in anomaly and host resistivity values, distance between electrodes and Wenner and Schlumberger measurement configurations are used to observe the measurement responses from different conditions. Keywords: DC Resistivity modeling, finite difference, anomaly parallel profiles Share Link | Plain Format | Corresponding Author (Imran Mohammad)

120	Physic	ABS-151
Structure of The Oka Ile Ange Geothermal Area, East Flores, East Nusa Tenggara Province, Indonesia from 2D Joint Inversion of Magnetotelluric and Gravity Data Anggie Susilawati (a*,b), Prihandhanu Mukti Pratomo (b), Wahyu Srigutomo (b), Doddy Sutarno (b), Enjang J. Mustopa (b), Kartika Hajar Kirana (a), Eleonora Agustine (a), Imran Hilman Mohammad (a), Yudi Rosandi (a) a) Geophysics Department, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung Sumedang KM. 21 Sumedang 45363, West Java, Indonesia *anggie[at]geophys.unpad.ac.id b) Physics of Earth and Complex Systems, Physics Department, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung, Indonesia Abstract Oka Ile Ange area is located in the east of Flores Island, East Nusa Tenggara that is a middle part of Banda Arc. The Oka Ile Ange is one of the geothermal areas under exploration to confirm the proven reserves. In geothermal exploration, magnetotelluric and gravity method widely used to determine the structure of geothermal system. About 110 gravity stations have been conducted around The Oka Ile Ange area and analyzed in conjunction with magnetotelluric data from over 120 MT stations in order to jointly interpret the density and resistivity distribution of the Oka Ile Ange geothermal structure. The joint inversion approach can reduce the number of acceptable models by combining several geophysical methods in a single inversion scheme so that the obtained model can explain all data simultaneously. The 2D resistivity and density models have allowed the identification of the geothermal system in The Oka Ile Ange area. The models confirms the presence of a fault system and a depression zone as the controlling factors of the geothermal system beneath the area which is characterized by an anomalous low resistivity and low density, as the main path for the hot fluids. Keywords: magnetotelluric- gravity- 2D joint inversion- geothermal Share Link | Plain Format | Corresponding Author (Anggie Susilawati)

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