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All Journal AKSIOMA: Jurnal Program Studi Pendidikan Matematika Suska Journal of Mathematics Education Jurnal Elemen International Journal of Science and Applied Science: Conference Series Jurnal Analisa SJME (Supremum Journal of Mathematics Education) International Conference on Mathematics and Science Education of Universitas Pendidikan Indonesia MEJ (Mathematics Education Journal) JPMI (Jurnal Pembelajaran Matematika Inovatif) Mosharafa: Jurnal Pendidikan Matematika Edumatica: Jurnal Pendidikan Matematika Journal on Mathematics Education Research Jurnal Pendidikan MIPA
Suhendra, S
Universitas Pendidikan Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Mathematics Physics Social Sciences Other

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MATHEMATICS TEACHERS’ ANXIETY IN TEACHING AND LEARNING PROCESS: A LITERATURE REVIEW Freddy Prasetyo; Suhendra Suhendra; Turmudi Turmudi
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 12, No 1 (2023)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.112 KB) | DOI: 10.24127/ajpm.v12i1.6660

Abstract

Over the last few decades, many studies have placed attention on math anxiety in students, but math teachers can also experience anxiety that requires the attention. Math teachers can experience the anxiety in the form of math anxiety and math teaching anxiety, which can affect the learning process of mathematics. The purpose of this study is to identify the factors that cause math anxiety and math teaching anxiety in teachers. The method used in this research is Systematic Literature Review (SLR) with a survey-based descriptive approach through analysis the articles that fulfilled the inclution criteria, namely (1) published during the last ten years (2013-2022), (2) written in Indonesian or English, (3) indexed by Scopus or Sinta, which are browsed on the Google Scholar, ERIC, and Garuda database using the keywords “teachers’ math anxiety" and “teacher’s math teaching anxiety”. The results showed that mathematics teachers who experience mathematics anxiety in the form of feelings of worry and discomfort when thinking or doing something related to mathematics, this is caused by a low level of mathematics knowledge and self-confidence, while mathematics teaching anxiety causes worry and feeling uncomfortable when going to or teaching mathematics, this is caused by several factors such as experiencing mathematics anxiety, low mastery of learning technology, low levels of self-confidence, and unsupportive learning infrastructure.
STUDENTS' ERROR IN SOLVING HOTS-CATEGORY MATHEMATICS PROBLEMS VIEWED FROM DIDACTIC TRIANGLE Teddy Septian R; Suhendra Suhendra; Yaya Sukjaya Kusumah
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 12, No 1 (2023)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (996.17 KB) | DOI: 10.24127/ajpm.v12i1.6643

Abstract

Student errors in solving Higher-Order Thinking Skills (HOTS) category math problems can be caused by the learning process experienced by them. In the learning process, there are three interrelated components, namely students, teachers, and materials which can be described in a didactic triangle, namely Didactic Relationship, Pedagogical Relationship, and Didactic-Pedagogical Anticipation Relationship. This study aims to describe students' error in solving HOTS-category math problems and the causes of these errors viewed from the didactical triangle. This study used a case study method with a qualitative approach conducted at one of the senior high schools in Bengkulu Province, involving three 10th-grade students as research subjects. Data were collected by using test, interview, and document study techniques. The results of this research show that errors appeared in the completion of each HOTS-category math problem, consisting of errors in using concepts, calculations, and failing to solve the problem. Viewed from the didactic triangle, these errors occur when students do not learn through the resources provided, learning activities tend to be monotonous, passive-student responses during the learning process, and teacher only focuses on conventional learning. Thus, the learning process experienced by students is unable to encourage them to think at the HOTS level.
Student Errors in Solving Three Dimensional Problems Based on Nolting Theory Muhammad Ridha; Suhendra Suhendra; Elah Nurlaelah
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 12, No 2 (2023)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v12i2.6739

Abstract

Abstrak Dimensi tiga adalah salah satu materi yang sulit dipahami oleh siswa, sehingga dalam menyelesaikan soal dimensi tiga siswa melakukan banyak kesalahan. Adapun tujuan penelitian ini adalah untuk mengetahui bentuk kesalahan siswa dan faktor penyebab kesalahan siswa dalam menyelesaikan soal dimensi tiga pada konsep jarak titik, garis dan bidang. Penelitian ini adalah penelitian kualitatif dengan pendekatan studi kasus. Subjek penelitian ini adalah 65 siswa kelas XII di salah satu SMA di kota Bandung, Jawa Barat. Adapun intrumen yang digunakan adalah soal tes dimensi tiga dan pedoman wawancara. Untuk menganalisis kesalahan siswa dalam penelitian ini digunakan teori Nolting. Hasil penelitian ini adalah kesalahan siswa dalam menyelesaikan soal dimensi tiga masih tergolong tinggi dengan persentase careless errors 54%, concept errors 65%, application errors 3% dan test-taking errors 37%. Adapun faktor penyebab terjadinya kesalahan-kesalahan tersebut dikarenakan siswa tidak menguasai materi prasyarat dengan baik, kesalahpahaman konsep jarak, kemampuan pandang ruang yang masih tergolong rendah dan tidak teliti. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa kesalahan terbesar siswa pada dimensi tiga adalah kesalahan konsep dalam menentukan jarak titik, garis dan bidang. Oleh karena itu, diharapkan kepada tenaga pendidik untuk dapat memperhatikan kesalahan dan faktor pernyebabnya agar tidak terjadi kesalahan serupa.Abstract The third dimension is one of the materials that students need help understanding, so in solving three-dimensional questions, students make many mistakes. The purpose of this research is to find out the form of student errors and the factors that cause student errors in solving three-dimensional questions on the concept of distance to points, lines, and planes. This research is qualitative research with a case study approach. The subjects of this study were 65 students of class XII in one of the high schools in Bandung, West Java. The instruments used were three-dimensional test questions and interview guidelines. To analyze student errors in this study, the Nolting theory was used. The results of this study show that students' errors in solving three-dimensional questions are still relatively high, with a percentage of careless errors of 54%, concept errors of 65%, application errors of 3%, and test-taking errors of 37%. These errors cause these errors because students do not master the prerequisite material well, misunderstand the concept of distance, and the ability to see space is still relatively low and not thorough. Based on the results of this study, it can be concluded that the biggest error of students in the third dimension is the concept error in determining the distance of points, lines, and planes. Therefore, it is expected that educators can pay attention to errors and their causal factors so that similar errors do not occur.
Creative Reasoning Ability of Students Based on Intrinsic Cognitive Load Fardatil Aini Agusti; Suhendra Suhendra
Jurnal Analisa Vol 9, No 1 (2023): Volume 9 Nomor 1 Tahun 2023
Publisher : Department of Mathematics Education, UIN Sunan Gunung Djati Bandung, West Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ja.v9i1.26527

Abstract

Kemampuan penalaran kreatif matematis merupakan kemampuan yang penting untuk dikuasai siswa. Kenyataannya, kemampuan penalaran kreatif matematis siswa cenderung bermasalah. Salah satu hal yang diyakini berpengaruh terhadap kesulitan siswa dalam memecahkan masalah pada matematika adalah beban kognitif intrinsic yang dihadapi. Oleh karena itu, penelitian ini bertujuan untuk mengungkapkan secara mendalam gambaran kemampuan penalaran kreatif siswa ditinjau berdasarkan beban kognitif intrinsic. Penelitian ini menggunakan pendekatan kualitatif dengan desain fenomenologi.  Subjek penelitian ini adalah siswa kelas VIII di salah satu MTs Negeri di Kabupaten Lima Puluh Kota, Provinsi Sumatera Barat yang telah mempelajari materi bangun ruang sisi datar. Data dikumpulkan melalui teknik tes dan wawancara. Hasil penelitian menunjukkan bahwa siswa yang memiliki beban kognitif intrinsic rendah dapat melakukan penalaran kreatif matematis dengan cukup konsisten. Siswa yang memiliki beban kognitif intrinsic sedang cukup bisa melakukan penalaran kreatif matematis tetapi belum konsisten. Sedangkan siswa yang memiliki beban kognitif intrinsic tinggi hampir tidak dapat melakukan penalaran kreatif matematis. Sebagai kesimpulan, diperoleh bahwa semakin rendah beban kognitif intrinsic yang dialamisiswa, semakin baik kemampuan penalaran kreatif matematis yang ia miliki. Berdasarkan kesimpulan tersebut, direkomendasikan untuk melakukan penelitian yang mengacu kepada penggunaan desain pembelajaran yang tepat untuk mengembangkan kemampuan penalaran kreatif matematis siswa pada masa yang akan datang. Mathematical creative reasoning is an essential ability for students. In reality, students' mathematical creative reasoning skills tend to be problematic. One thing that is believed to affect students' difficulties in solving problems in mathematics is the intrinsic cognitive load they face. Therefore, this study aims to describe students' creative reasoning abilities regarding intrinsic cognitive load in depth. This study uses a qualitative approach with a phenomenological design. The subjects of this study were students of class VIII from one of the state Islamic junior high schools in Lima Puluh Kota Regency, West Sumatra Province, which studied the materials for flat and solid geometry. Data was collected through test and interview techniques. The study results show that students with low intrinsic cognitive load can consistently perform creative mathematical reasoning. Students with moderate intrinsic cognitive load can do creative mathematical reasoning but are inconsistent. Meanwhile, students with a high intrinsic cognitive load can almost not do creative mathematical reasoning. In conclusion, it is found that the lower the intrinsic cognitive load experienced by students, the better their creative mathematical reasoning abilities will be. Based on the conclusion, research is recommended to use suitable learning designs to develop students' mathematical creative reasoning skills in the future.
Students' Pseudo-Thinking Process in Solving SPLDV Problems Based on Polya's Stages Alfi Syahraini; Nanang Priatna; Suhendra Suhendra
Jurnal Analisa Vol 9, No 1 (2023): Volume 9 Nomor 1 Tahun 2023
Publisher : Department of Mathematics Education, UIN Sunan Gunung Djati Bandung, West Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ja.v9i1.26543

Abstract

Proses berpikir pseudo siswa terdiri dari pseudo benar dan pseudo salah, dapat dilihat dari cara menyelesaikan soal SPLDV berdasarkan tahapan Polya. Masalah yang akan dikaji adalah proses berpikir pseudo siswa saat menyelesaikan soal SPLDV dengan tahapan Polya. Penelitian ini bertujuan mendeskripsikan proses berpikir pseudo siswa dalam memecahkan masalah berdasarkan Tahapan Polya. Penelitian ini dilakukan di salah satu SMP Kota Jambi, Provinsi Jambi, dengan subjek penelitian 2 siswa kelas 8 untuk materi Sistem Persamaan Linear Dua Variabel. Metode yang diguanakan dalam penelitian ini adalah penelitian kualitatif. Pengumpulan data dilakukan dengan triangulasi data, adapun instrumen penelitian menggunakan tes pemecahan masalah dan pedoman wawancara. Analisis data yang dilakukan terdiri dari reduksi data penyajian data dan penarikan kesimpulan. Temuan dari penelitian ini adalah: 1) Pada proses pemecahan masalah matematis, terdapat siswa yang menjawab benar akan tetapi saat di wawancara ternyata siswa hanya hafal rumus dan tidak memahami konsep, ini dinamakan pseudo benar. 2) Pada proses pemecahan masalah matematis, terdapat siswa yang menjawab salah tetapi setelah diwawancara siswa dapat merefleksikan sehingga mampu memperbaiki jawaban, ini dinamakan pseudo salah. Berdasarkan hasil penelitian, saat mengajar guru dapat mengetahui mana siswa yang benar-benar berpikir dan mana yang berpikir pseudo. The student's pseudo thought process consists of pseudo-true and pseudo-false, it can be seen from how to solve SPLDV problems based on Polya's stages. The problem to be studied is the pseudo thought process of students when solving SPLDV problems with Polya's stages. This study aims to describe the pseudo thought process of students in solving problems based on Polya's stages. This research was conducted at one of the Jambi City Junior High Schools, Jambi Province, with the research subject 2 students of 8th grade students for the material of the System of Linear Equations of Two Variables. The method used in this research is qualitative research. Data collection was carried out by triangulating data, while the research instruments used problem solving tests and interview guidelines. The data analysis consisted of data reduction, data display and conclucing drawing/verification. The findings of this study are: 1) In the process of solving mathematical problems, there are students who answer correctly but when interviewed it turns out that students only memorize formulas and do not understand concepts, this is called pseudo correct. 2) In the process of solving mathematical problems, there are students who answer incorrectly but after being interviewed students can reflect so that they can improve their answers, this is called pseudo-false. Based on the results of the study, when teaching teachers can find out which students are really thinking and which ones are pseudo thinking.
MATHEMATICAL CRITICAL THINKING ABILITY BASED ON STUDENTS SELF-EFFICACY USING PHENOMENOLOGICAL STUDY APPROACH Irfa Ul Umam; Elah Nurlaelah; Suhendra Suhendra
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 12, No 2 (2023)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v12i2.6859

Abstract

Critical thinking is a key skill in terms of being used in most thinking processes. There is one variable related to critical thinking, namely self-efficacy. This can be seen from a positive significant relationship between self-efficacy and critical thinking. In this regard, this study aims to describe mathematical critical thinking abilities based on students' self-efficacy. This study uses a phenomenological approach. The researcher gave a self-efficacy questionnaire to class X students at a public high school in the city of Bandung, followed by giving tests on critical thinking skills, and conducted interviews with students with high self-efficacy (ST), medium self-efficacy (SS), and low self-efficacy (SR). The results show that ST belongs to high-level mathematical critical thinking skills in solving math problems. If students have high self-efficacy, so it will also have an impact on high critical thinking skills. SS is in the category of moderate-level critical thinking skills, thus showing that students with moderate self-efficacy do not necessarily have moderate-level mathematical critical thinking skills. SR cannot solve the given questions correctly and completely, so students with low levels of self-efficacy have low mathematical critical thinking skills.Kemampuan berpikir kritis menjadi kemampuan kunci yang digunakan pada proses berpikir. Literatur menunjukkan kemampuan berpikir kritis siswa masih perlu ditingkatkan. Oleh karenanya perlu dideskripsikan kemampuan berpikir kritis melalui variabel yang memoderatorinya. Terdapat salah satu variabel yang berkaitan dengan berpikir kritis, yaitu self-efficacy. Hal ini ditunjukkan dengan adanya hubungan positif yang signifikan antara self-efficacy dan berpikir kritis. Berkaitan dengan itu, tujuan penelitian ini untuk mendeskripsikan kemampuan berpikir kritis matematis berdasarkan self-efficacy siswa. Penelitian ini menggunakan pendekatan fenomenologi. Peneliti memberikan angket self-efficacy ke siswa kelas X di salah satu SMA Negeri di kota Bandung, dilanjutkan dengan memberikan tes kemampuan berpikir kritis, dan melakukan wawancara terhadap siswa dengan self-efficacy tinggi (ST), sedang (SS), dan rendah (SR). Hasil menunjukkan bahwa ST tergolong dalam kategori kemampuan berpikir kritis matematis tingkat tinggi dalam menyelesaikan soal matematika. Apabila siswa memiliki efikasi diri yang tinggi maka akan juga berdampak pada kemampuan berpikir kritis yang tinggi. SS berada pada kategori kemampuan berpikir kritis tingkat sedang, sehingga memperlihatkan bahwa siswa dengan kategori self-efficacy sedang belum tentu mempunyai kemampuan berpikir kritis matematis pada tingkat sedang pula. SR tidak dapat menyelesaikan soal yang diberikan dengan benar dan lengkap, sehingga siswa dengan tingkat self-efficacy rendah memiliki kemampuan berpikir kritis matematis yang rendah pula.
Pemberian scaffolding dalam pemecahan masalah matematis siswa SMP Alfi Syahraini; Nanang Priatna; Suhendra Suhendra
JPMI (Jurnal Pembelajaran Matematika Inovatif) Vol. 6 No. 4 (2023): Juli
Publisher : IKIP Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/jpmi.v6i4.17923

Abstract

This study aims to observe students' systematic problem solving by applying scaffolding. Providing a framework plays an important role for students who struggle to solve problems in the system of linear equations of two variables. The research subjects were Jambi Junior High School VIII grade students as many as two students. The research method used is descriptive qualitative method applied in the research process with data collected through Polya's problem solving description test two questions with unstructured interviews. Two students who solve problems in the form of descriptions begin to plan solutions to problems that are analyzed in general. So, the framework that can be given consists of description, structuring, and validation. Errors in problem solving can be addressed by observing the understanding of the problem, planning the solution, implementing the solution plan, and checking back.
Students' mathematical argumentation ability when proving mathematical statements based on self-efficacy Surya Kurniawan; Rizky Rosjanuardi; Suhendra Suhendra
Jurnal Elemen Vol 9 No 2 (2023): July
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/jel.v9i2.15151

Abstract

Argumentation as an aspect of problem-solving has been studied in mathematics education. However, mathematical proof still needs to be resolved further. This study investigates students' mathematical argumentation skills when proving mathematical statements based on their self-efficacy. The research subjects were 43 mathematics education students at a university in Aceh Province who had taken a number theory course. The study used a qualitative approach with a case study design: students’ mathematical proving self-efficacy. Data was obtained using self-efficacy questionnaires and mathematical proof test instruments that experts have validated, while the data triangulation used was an in-depth interview. The results of this study reveal that students' mathematical argumentation skills in proving mathematical statements have differences based on their self-efficacy. The mathematical argumentation ability of students with high self-efficacy involves all aspects of argumentation well so that the construction of the proof is scientifically correct. Meanwhile, the argumentation ability of students with moderate or low self-efficacy still does not involve essential aspects of argumentation. So, the proof results are not scientifically correct because they have not arrived at the proper conclusion.
UPAYA MENINGKATKAN KEMAMPUAN PEMAHAMAN KONSEP MATEMATIS SISWA MELALUI MODEL PEMBELAJARAN TIPE THINK TALK WRITE Silvyani Eka Putri; Suhendra Suhendra; Endang Cahya Mulyaning Asih
Journal on Mathematics Education Research (J-MER) Vol 1, No 1 (2020)
Publisher : Departemen Pendidikan Matematika, FPMIPA, UPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/j-mer.v1i1.24572

Abstract

Pemahaman konsep matematis merupakan tujuan yang harus dicapai dalam pembelajaran matematika Namun, pemahaman konsep matematis siswa di Indonesia masih tergolong rendah Penelitian ini merupakan penelitian yang memberikan informasi mengenai upaya meningkatkan kemampuan pemahaman konsep matematis siswa SMP. Tujuan penelitian ini adalah untuk mengetahui pencapaian dan peningkatan kemampuan pemahaman konsep matematis siswa yang mendapatkan pembelajaran dengan model pembelajaran kooperatif tipe Think Talk Write (TTW) dibandingkan dengan siswa yang mendapatkan pembelajaran dengan model konvensional dan untuk mengetahui respons siswa terhadap pembelajaran dengan model kooperatif tipe TTW. Populasi dalam penelitian ini adalah seluruh siswa kelas VII di salah satu SMP Negeri di kota Cimahi dengan dua kelas yang ditetapkan secara sengaja sebagai sampel. Adapun data penelitian diperoleh dari instrumen tes dan instrumen non tes. Hasil penelitian menunjukkan bahwa pencapaian kemampuan pemahaman konsep matematis siswa yang mendapatkan pembelajaran dengan model pembelajaran kooperatif tipe TTW lebih tinggi daripada siswa yang mendapatkan pembelajaran konvensional. Kemudian peningkatan kemampuan pemahaman konsep matematis siswa yang mendapatkan pembelajaran dengan model pembelajaran kooperatif tipe TTW lebih baik daripada siswa yang mendapatkan pembelajaran konvensional. Selain itu, respons siswa terhadap pembelajaran dengan model pembelajaran kooperatif tipe TTW menunjukkan hasil positif, yang ditandai dengan siswa semangat belajar, percaya diri untuk berpendapat, mampu menambah pemahaman saat ada siswa yang berbeda penyelesaian masalah, dan mampu mempresentasikan hasil kerjanya dengan penuh percaya diri meskipun diperhatikan oleh guru dan siswa yang lain.
INTEGRASI ASPEK-ASPEK ETNOMATEMATIKA MASYARAKAT MAJALENGKA DALAM PEMBELAJARAN MATEMATIKA herayanti herayanti; suhendra suhendra; dadang juandi
Journal on Mathematics Education Research (J-MER) Vol 2, No 1 (2021)
Publisher : Departemen Pendidikan Matematika, FPMIPA, UPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/j-mer.v2i1.54235

Abstract

Matematika dan budaya adalah dua etnis yang terkait. Matematika salah satu pelajaran yang bersifat abstrak. Akibatnya siswa menganggap matematika itu sulit sehingga matematika jauh dalam kehidupan sehari-hari. Budaya memiliki peran untuk menjadi objek konkret dalam pembelajaran matematika. Etnomatematika merupakan jembatan antara budaya dengan matematika. Tujuan dari penelitian ini adalah untuk mendeskripsikan aspek-aspek etnomatematika masyarakat Majalengka yang dapat diintegrasikan dalam pembelajaran matematika. Metode yang digunakan dalam penelitian ini adalah pendekatan kualitatif dengan menggunakan desain etnografi. Subjek dalam penelitian ini yaitu tokoh pengrajin batik di Kabupaten Majalengka. Hasil penelitian menunjukan bahwa terdapat aspek-aspek etnomatematika pada aktivitas matematis diantaranya aktivitas counting (menghitung) meliputi alat dan bahan yang digunakan dan estimasi waktu yang digunakan dalam pembuatan batik; measuring (mengukur) meliputi ukuran kain, ukuran cetakan dan luas lahan yang diperlukan dalam pembuatan batik; designing (mendesain) meliputi macam-macam motif dan bidang-bidang pada motif batik; playing (bermain) meliputi ciri khas pada batik; dan explaining (menjelaskan) meliputi makna/filosofi pada motif batik. Pada produk batik terdapat motif-motif yang memiliki konsep-konsep matematika seperti konsep kongruen pada bidang, konsep dilatasi (perkalian) dan konsep refleksi (pencerminan). Terdapat aspek-aspek etnomatematika masyarakat Majalengka yang dapat diintegrasikan dalam pembelajaran matematikaKata kunci: Etnomatematika, Aktivitas Matematis, Batik, Pembelajaran Matematika
Co-Authors A Jupri Alfi Syahraini Bambang Avip P. Cichi Farhan Syahmar Marpaung Dadang Juandi Elah Nurlaelah Endang Cahya M.A Eritha Dewi Febrianty Fardatil Aini Agusti Freddy Prasetyo Hafizh Nizham Hanifa Dina Aulia Dewi Umbara Hanne Ayuningtias Elsa herayanti herayanti Herizal Herizal Ikbal Pauji Irfa Ul Umam Lia Halimatus Sadiah M Meiriyanti M. Azhari Panjaitan Muhammad Ridha Mutiara Pertiwi Nanang Priatna Nurdiyah Kurniati P K Sari Peni Fauziah Puadah R Gusmiyanti Rizky Rosjanuardi Silvyani Eka Putri Sufyani Prabawanto, Sufyani Surya Kurniawan Syifa Mardliyah Tatang Herman, Tatang Teddy Septian R Turmudi Yaya Sukjaya Kusumah