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Rizky Rosjanuardi

Universitas Pendidikan Indonesia

Author-ID : 364434

Humanities Computer Science & IT Education Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Public Health Social Sciences Other

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Mathematical Literacy Skills of Prospective Mathematics Teachers in Capita Selecta Course: A Hermeneutic Phenomenology Approach Nuraeni, Reni; Dahlan, Jarnawi Afgani; Rosjanuardi, Rizky; Jupri, Al
Jurnal Pendidikan MIPA Vol 26, No 1 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i1.pp527-538

The mathematical literacy ability of students is still relatively low, and they have not been trained optimally. This study aims to analyze the level of mathematical literacy of prospective mathematics teacher students in the Selected Capita of Elementary Mathematics Education II course. The material includes the Pythagorean Theorem, Quadrilaterals and Triangles, Curved Side Spaces, and Comparison. The subjects of the study involved 25 students who were taking the Selected Capita of Elementary Mathematics Education II course. The research method used was qualitative with the Phenomenology Hermeneutic approach. The stages of the Phenomenology Hermeneutic approach are deciding on research questions, identifying pre-understanding, gaining understanding through dialogue with participants, gaining knowledge through dialogue with text, and building trust. Data were collected through descriptions of student answers and selected interviews. The data analysis technique follows the steps of Miles & Huberman. Question number 3 has a literacy indicator, namely interpreting solutions in problem-solving (interpret). The focus of the analysis is on students' answers to question number 3. Three students answered correctly, while one student answered with a few errors. While answers from 20 students contain significant errors, 1 student did not provide an answer. 3 students, who correctly answered question number 3, belong to moderate-ability students. Nevertheless, none of the students from the high-ability group were able to answer perfectly. This shows that students with moderate ability are better at answering question number 3 than students with high ability. Of the 20 student answers with the criteria of many errors, two answer patterns were found, errors in process skills and errors in writing the final answer. Efforts are needed to improve literacy skills through the presentation of literacy questions and learning that supports the development of students' mathematical literacy. Keywords: capita selecta course, mathematical literacy skills, prospective mathematics teacher, hermeneutic phenomenology.

Algebraic reasoning of high school students in solving inverse function problems: Viewed from mathematical resilience Fitrianna, Aflich Yusnita; Rosjanuardi, Rizky; Prabawanto, Sufyani
Indonesian Journal of Science and Mathematics Education Vol. 7 No. 2 (2024): Indonesian Journal of Science and Mathematics Education
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ijsme.v7i2.21087

Algebra is one of the essential branches of mathematics that often presents challenges for students, especially when faced with inverse function problems. This study aims to describe algebraic reasoning in solving inverse function problems from the perspective of students' mathematical resilience. This qualitative research uses a case study design involving 33 eleventh-grade students from a public high school in West Bandung Regency. The instruments used were a mathematical resilience scale and an algebraic reasoning test. Data analysis was conducted through data reduction, presentation, and conclusion drawing. The results showed that 15.15% of students had low resilience, 72.72% had moderate resilience, and 12.12% had high resilience. There were different characteristics in algebraic reasoning among students in these resilience categories. The implications indicate that targeted learning strategies can enhance algebraic reasoning, especially for moderate and low-resilience students.

Promoting Computational Thinking through Programming Trends, Tools, and Educational Approaches: a Systematic Review Irawan, Edi; Rosjanuardi, Rizky; Prabawanto, Sufyani
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 8, No 4 (2024): October
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v8i4.26407

This systematic research aims to provide a comprehensive overview of the development of analysis related to the use of programming in the development of Computational Thinking (CT), especially in the context of education from primary to tertiary levels. This study analyzed 88 articles from empirical studies related to the use of programming to develop CT sourced from the Scopus database. The analysis process followed the PRISMA 2020 guidelines and consisted of three stages: search, selection, and data analysis. Descriptive and thematic statistical approaches were used for data analysis. Instruments used in the selection of articles included Rayyan for screening based on inclusion criteria, as well as Microsoft Excel for coding and thematic analysis. The results showed that articles related to the use of programming to promote CT have appeared since 2011 but have increased significantly since 2016, with an annual growth rate of 17.6%. Most studies used quantitative approaches, followed by qualitative and mixed methods. Overall, 270 authors from 27 countries contributed to the study, with the United States having the highest number of publications. A total of 33 programming tools were identified, with Scratch being the most widely used tool, followed by Blockly, LEGO, Scratch Jr., Code.org, Python, Alice, App Inventor, Kodu, R, MakeCode, and Arduino. Scratch Jr. is most commonly used at the early childhood education level, while programming languages such as Python, R, and MATLAB are more commonly used in higher education. The implications of these findings suggest that the trend of using programming tools such as Scratch and Blockly has the potential to influence CT teaching strategies in the classroom, as well as the importance of using varied programming tools in efforts to integrate CT into the education curriculum.

IDENTIFIKASI HAMBATAN BELAJAR SISWA PADA MATERI KONSEP PERSAMAAN DAN PERTIDAKSAMAAN NILAI MUTLAK SATU VARIABEL Panjaitan, M. Azhari; Rosjanuardi, Rizky
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 14, No 3 (2025)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v14i3.7180

Penelitian ini dilaksanakan di Sekolah Menengah Atas (SMA). Adapun tujuan penelitian ini adalah mengidentifikasi hambatan-hambatan belajar siswa pada konsep persamaan dan pertidaksamaan nilai mutlak satu variabel. Penelitian ini menggunakan metode kualitatif dengan paradigma interpretif dan paradigma kritis. Subjek penelitian merupakan siswa kelas X Sekolah Menengah Atas Swasta (SMAS) di Kota Bandung Provinsi Jawa Barat. Subjek dipilih berdasarkan materi yang sudah dipelajari mengenai persamaan dan pertidaksamaan nilai mutlak satu variabel. Pengumpulan data menggunakan tes dan wawancara. Tes terdiri dari 4 soal tentang materi persamaan dan pertidaksamaan nilai mutlak satu variabel yang telah divalidasi oleh ahli matematika. Setelah siswa menyelesaikan tes, peneliti mengamati jawaban siswa dan memilih beberapa siswa untuk dilakukan wawancara. Berdasarkan hasil penelitian, siswa mengalami tiga jenis hambatan belajar yaitu hambatan epistemologis, ontogenik, dan didaktis. Siswa mengalami hambatan epistemologis karena pemahaman konsep yang tidak lengkap dan tidak terbiasa menerapkan konsep matematika yang satu ke konsep matematika yang lain. Kemudian, siswa juga mengalami hambatan belajar secara ontogenik karena tidak memahami konsep persamaan dan pertidaksamaan nilai mutlak sat variabel. Selain itu, proses pembelajaran yang dilakukan oleh guru juga menjadi faktor dimana siswa mengalami hambatan didaktis. Hasil dari penelitian ini mengilustrasikan dari keadaan kondisi siswa saat mempelajari persamaan dan pertidaksamaan nilai mutlak satu variabel. Dengan temuuan hasil penelitian, diperlukan adanya desain didaktis terhadap materi persamaan dan pertidaksamaan nilai mutlak sat variabel yang dapat meminimalisir terjadinya hambatan-hambatan belajar yang telah teridentifikasi.

Advancing Computational Thinking in Mathematics Education: a Systematic Review of Indonesian Research Landscape Irawan, Edi; Rosjanuardi, Rizky; Prabawanto, Sufyani
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 8, No 1 (2024): January
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v8i1.17516

Computational Thinking (CT) has emerged as a crucial and foundational skill in the 21st century, capturing the attention of researchers across various domains, including mathematics education in Indonesia. This research identifies and analyzes trends, themes, focuses, and research findings on CT through mathematics learning in Indonesia. This Systematic Literature Review (SLR) adheres to the PRISMA guidelines, encompassing three stages: search, selection, and data analysis. The search process on the Scopus database, utilizing queries aligned with the research objectives, yielded 31 articles related to CT and mathematics education authored by Indonesian researchers. Subsequent selection involved criteria such as research focus, study type, document availability, and intervention differences, resulting in 14 articles. Data analysis employed Bibliometrix and NVivo 14 Plus software. The findings reveal a significant increase in research on CT in mathematics education from Indonesian researchers over the past two years, with an annual growth rate of 5.74%. This publication landscape involves contributions from 39 authors affiliated with 16 higher education institutions in Indonesia. Researchers have delved into diverse themes, including the analysis of CT skill achievement, the development of CT-oriented instructional models and media, and the creation of assessment tools to measure CT skills. These findings underscore the broad relevance of CT in the realm of mathematics education. As a burgeoning field of study, numerous aspects of CT remain open for further research, development, and exploration, especially those related to mathematics. To enhance the impact and implementation of Computational Thinking (CT) within the context of Indonesian education, future research may consider investigating innovative pedagogical approaches, assessing the long-term impact of CT interventions, and exploring the potential integration of CT across various educational levels.

Development of Mathematical Maturity through the Amalgamation of Computational Thinking and Technology-Enhanced Learning Prabawa, Harsa Wara; Rosjanuardi, Rizky; Nurlaelah, Elah
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 8, No 3 (2024): July
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v8i3.23766

Advancements in technology and global information infrastructure have transformed education, leveraging a constructivist approach that enhances knowledge construction through student interaction with computer applications. The research aimed to explore the facilitation of enhancing mathematical maturity through the integration of technology in mathematics education using computational thinking. This research employed a qualitative method with a case study approach. The participants in this study were 15 Grade XI students from various classes of the Vocational High School, selected from a total of 159 students. The data collection techniques used in this research included observation and open-ended test instruments. The data analysis techniques involved data reduction, data presentation, and conclusion drawing. The research results show: (1) technology enhances mathematics education; (2) computers deepen mathematical understanding; (3) technology creates contextual learning environments for problem-solving; (4) combining computational thinking and technology aids in mastering mathematical concepts. The conclusion is that integrating computational thinking with technology-enhanced learning significantly fosters mathematical maturity among students.

Ideal Urutan pada Jumlah Langsung Leksikografik dari Grup Abel Terurut Total R dan Z Eneng Riska Nuraeni; Imam Nugraha Albania; Rizky Rosjanuardi; Sumanang Muhtar Gozali
Limits: Journal of Mathematics and Its Applications Vol. 21 No. 1 (2024): Limits: Journal of Mathematics and Its Applications Volume 21 Nomor 1 Edisi Ma
Publisher : Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Misalkan G1 = R ._lex Z dan G2 = Z ,_lex R adalah grup abel terurut total. Bentuk umum setiap subgrup dari G1 adalah G ,_lex nZ, sedangkan bentuk umum subgrup dari G2 adalah nZ ,_lex G dengan G merupakan subgrup dari R dan n adalah anggota dari himpunan bilangan asli atau nol (n e N U {0}). Tujuan dari paper ini adalah memperoleh gambaran mengenai ideal urutan tak trivial dari G1 dan G2. Metode yang digunakan diawali dengan menentukan subgrup-subgrup dari R dan Z, kemudian menjumlahkan langsung subgrup-subgrup dari R dan Z tersebut. Hasil penjumlahan langsung tersebut merupakan subgrup-subgrup tak trivial dari G1 dan G2. Selanjutnya dilakukan uji sifat pengawetan urutan dari setiap bentuk subgrup tak trivial dari G1 dan G2 tersebut. Dari metode tersebut diperoleh hasil bahwa satu-satunya ideal urutan tak trivial dari G1 adalah subgrup {0} ,_lex Z dan satu-satunya ideal urutan tak trivial dari G2 adalah subgrup {0} ,_lex R, meskipun setiap subgrup tak trivial dari R dan Z masing-masing tidak memiliki sifat pengawetan urutan. Kesimpulan pada paper ini adalah bahwa satu-satunya ideal urutan tak trivial pada R ,_lex Z adalah {0} ,_lex Z yang isomorfik dengan Z sebagai grup, sedangkan satu-satunya ideal urutan tak trivial pada Z ,_lex R adalah {0} ,_lex R yang isomorfik dengan R sebagai grup.

Function-Theoretic Operator Norm Inequalities: A Kosaki-type Generalization to Symmetric Probability Weights Albania, Imam Nugraha; Rosjanuardi, Rizky
CAUCHY: Jurnal Matematika Murni dan Aplikasi Vol 10, No 2 (2025): CAUCHY: JURNAL MATEMATIKA MURNI DAN APLIKASI
Publisher : Mathematics Department, Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/cauchy.v10i2.36905

Operator norm comparisons play a fundamental role in matrix analysis, yet existing proofs often depend on operator means or interpolation techniques. This study provides a function-theoretic approach to operator norm inequalities. It also extends the classical two-term Heinz comparison to multi-term averages with arbitrary symmetric probability weights. Our approach translates each operator norm comparison into a scalar condition. The condition is derived from functional calculus for the left and right multiplication operators. We examine positive-definiteness and infinite divisibility through Fourier-measure representations. We also use elementary closure properties. For positive operators and any unitarily invariant norm, the two-term Heinz symmetrization is dominated by the binomial average when the exponent differs from one-half by at most one divided by twice the number of terms. For general symmetric probability weights, domination occurs exactly when the exponent lies within a specific threshold. This threshold equals the smallest positive distance from the midpoint to any index carrying nonzero weight. The proposed function-theoretic framework yields necessary and sufficient thresholds to unify the binomial and general symmetric cases.

Self-Efficacy and Reflective Thinking Skills Attributes of Pre-service Mathematics Teachers Ariany, Riva Lesta; Rosjanuardi, Rizky; Juandi, Dadang
Mosharafa: Jurnal Pendidikan Matematika Vol. 12 No. 1 (2023): January
Publisher : Department of Mathematics Education Program IPI Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/mosharafa.v12i1.754

Kemampuan berpikir reflektif merupakan salah satu kemampuan yang perlu dimiliki oleh calon guru matematika agar dikemudian hari menjadi guru yang profesional. Pengembangan karakteristik berpikir reflektif ini dipengaruhi oleh banyak faktor. Penelitian ini bertujuan mengkaji apakah terdapat hubungan antara efikasi diri sebagai variabel bebas, terhadap Kemampuan Berpikir Reflektif mahasiswa calon guru matematika sebagai variabel terikat. Penelitian ini menggunakan pendekatan kuantitatif dengan metode korelasional. Instrumen yang dipergunakan dalam pengumpulan data berupa angket efikasi diri dan angket kemampuan berpikir reflektif. Penelitian ini melibatkan mahasiswa Program Studi Pendidikan Matematika semester VII yang berlokasi di Jawa Barat. Analisis data yang dilakukan dengan melakukan uji korelasi dan regresi linier. Hasil analisis menunjukkan adanya pengaruh positif efikasi diri terhadap Kemampuan Berpikir Reflektif calon guru matematika. Reflective thinking is one of the abilities the pre-service mathematics teachers need to have to become professional teachers in the future. The development of this reflective thinking characteristic is influenced by many factors. This study examined the correlation between self-efficacy, as an independent variable, on the reflective thinking attributes of pre-service mathematics teacher as a dependent variable. This quantitative study utilized the correlational method. The instruments used in data collection were self-efficacy and reflective thinking attributes questionnaires. This study involved teacher students of the seventh semester of the Mathematics Education study program. The data analysis was carried out by performing correlation and linear regression tests. The results of the analysis showed that there was a positive effect of self-efficacy on the reflective thinking attributes of pre-service mathematics teachers.

Super Geo-Bros Game: A Scratch-Based Mathematics Game for Learning Geometric Transformations to Improve Learning Outcomes Fitrianingsih, Ajeng Nur Aulia; Rosjanuardi, Rizky; Sudihartinih, Eyus
Jurnal Pendidikan MIPA Vol 25, No 2 (2024): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

This study aims to develop and evaluate the Super Geo-Bros game, an educational tool designed to assist ninth-grade students in understanding geometric transformations through interactive, Scratch-based technology. Following the ADDIE model, the research was conducted in five stages: analysis, design, development, implementation, and evaluation. The game allows students to interact with geometric shapes and perform transformations such as translation, rotation, reflection, and dilatation. Validation tests involving media and content experts demonstrated that the game is valid, practical, and effective, with a significant increase in students’ learning outcomes. The gain score of 0.71 indicates a high level of improvement, showing that this game enhances engagement and facilitates better comprehension of abstract mathematical concepts. Keywords: educational game, geometric transformation, mathematics learning, scratch, learning media.DOI: http://dx.doi.org/10.23960/jpmipa/v25i2.pp792-802

Co-Authors Aflich Yusnita Fitrianna Aflich Yusnita Fitrianna Aflich Yusnita Fitrianna Agustian, Muhammad Rifqi Agustian, Muhammad Rifqi Albania, Imam Nugraha Andina Aulia Rachma Anggareni, Peni Ariany, Riva Lesta Aris Hadiyan Wijaksana Aswin Aswin Aziiza, Yushilatu Felayati Azizah, Firda Bilqis Azizah, Firda Bilqis Balkist, Pujia Dadang Juandi Dadang Juandi Darhim Darhim Delsika Pramata Sari Dewi, Reza Farhania DIAN LATIFAH, DIAN Didi Suryadi Didi Suryadi Dika Faiz Himmawan Edi Irawan Elah Nurlaelah Elah Nurlaelah Endang Cahya Mulyaning A. Eneng Riska Nuraeni Entit Puspita Entit Puspita Eyus Sudihartinih Fitrianingsih, Ajeng Nur Aulia Harsa Wara Prabawa Imam N Albania Imam Nugraha Albania Irham Walidaka Ishma Fadlina Urfa, Ishma Fadlina Isnie Yusnitha, Isnie Jarnawi Afgani Dahlan Kadir, Kamaliyah Kertayasa, I Ketut Khusnul Novianingsih Lovitarani, Destiana Lovitarani, Destiana LUKMAN, LUKMAN Maknun, Churun Lu'lu'il Masta, Al Azhary Muhammad Awaludin Nasution Muhammad Fajar Anugrah Muhammad Nur Hidayat Taufiqurrahman Mulyaning Asih, Endang Cahya Mulyono, Budi Mursidah Mursidah Nadia Shabilla, Nadia Nanang Priatna Nunung Nurhidayah, Nunung Nurhayati, Aat Nurhuda Teapon Panjaitan, M. Azhari Prabawa, Harsa Wara Rachma, Andina Aulia Ratri Isharyadi, Ratri Reka Ikraami Kurniawan Rekha Bestari Martista Reni Nuraeni, Reni Rini Marwati Ririn Sispiyati Riska Novia Sari, Riska Novia Riva Lesta Ariany Rizza Lestari Rudi Rudi Rudi Rudi Sardin Solly Aryza Sufyani Prabawanto, Sufyani Sugianto, Andi Suhendra, S Sumanang Muhtar Gozali Surachman, Annisanti Surachman, Annisanti Surya Kurniawan Syafdi Maizora Thesa Kandaga Toto Subroto Wijaksana, Aris Hadiyan Yaya S Kusumah Yaya S. Kusumah Yuliardi, Ricki Yushilatu Felayati Aziiza

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