p-Index From 2021 - 2026
8.207
P-Index
This Author published in this journals
All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni Pythagoras: Jurnal Matematika dan Pendidikan Matematika Jurnal Penelitian dan Pengembangan Pendidikan Journal on Mathematics Education (JME) Journal on Mathematics Education (JME) Jurnal Riset Pendidikan Matematika AKSIOMA: Jurnal Program Studi Pendidikan Matematika Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika PEDAGOGIA Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Journal of Honai Math JTAM (Jurnal Teori dan Aplikasi Matematika) Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan International Journal on Emerging Mathematics Education Beta: Jurnal Tadris Matematika Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah di Bidang Pendidikan Matematika Islamic Guidance and Counseling Journal JISIP: Jurnal Ilmu Sosial dan Pendidikan Mandalika Mathematics and Educations Journal Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran JagoMIPA: Jurnal Pendidikan Matematika dan IPA Journal for Lesson and Learning Studies PROFICIO: Jurnal Pengabdian Masyarakat Kognitif: Jurnal Riset HOTS Pendidikan Matematika Edumatika Jurnal DiMas (Jurnal Pengabdian Kepada Masyarakat) Jurnal Locus Penelitian dan Pengabdian Indonesian Journal Of Educational Research and Review Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Journal of Mathematics Instruction, Social Research and Opinion Journal of General Education and Humanities Edukasia: Jurnal Pendidikan dan Pembelajaran Edumatica: Jurnal Pendidikan Matematika Indonesian Journal of Mathematics Education Jurnal Pedagogi Matematika Indonesian Educational Research Journal Kreano, Jurnal Matematika Kreatif Inovatif Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Arsitektur ARCADE Journal on Mathematics Education Jurnal Didaktik Matematika Eduma : Mathematics Education Learning and Teaching
Claim Missing Document
Check
Articles

Pengaruh Covid-19 Terhadap Kesehatan Mental Masyarakat Di Kota Malang Setyaningrum, Wahyu; Yanuarita, Heylen Amildha
JISIP: Jurnal Ilmu Sosial dan Pendidikan Vol 4, No 4 (2020): JISIP (Jurnal Ilmu Sosial dan Pendidikan)
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jisip.v4i4.1580

Abstract

It is undeniable that the presence of the COVID-19 pandemic has a major impact on public health. Not only from a physical point of view, but also psychological health because of the various problems and anxiety that occurs as a result. This study aims to see and find out how COVID-19 affects the mental health of the community, especially in Malang City, East Java. In the research, the writer used descriptive qualitative method assisted by purposive sampling technique. Of course, it is complemented by a simple literature study on various data and documents that already exist and are related to the subject under study. The results of this study show that the COVID-19 pandemic does have an impact on people's mental health, mainly due to high levels of stress due to illness caused by viruses, excessive anxiety, and various other influences.
Pengembangan Media Edutainment Pembelajaran Aritmatika Sosial Berorientasi pada Pemahaman Konsep Matematis dan Self-Directed Learning La Ode Adin Hasrun Bici; Wahyu Setyaningrum
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 5 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i5.763

Abstract

This study was conducted to develop an edutainment-based learning media product and to assess its feasibility in terms of validity, practicality, and effectiveness with a focus on understanding mathematical concepts and fostering self-directed learning in social arithmetic topics. The research employed a development approach using the ADDIE model, which consists of Analysis, Design, Development, Implementation, and Evaluation. The instruments used included validation sheets completed by experts, practicality questionnaires filled out by teachers and students, mathematical concept comprehension tests, and self-directed learning questionnaires. Research subjects consisted of two groups: a small-scale trial with 10 seventh-grade students and a large-scale trial with 32 students. The findings revealed that the edutainment learning media developed was appropriate for use, fulfilling all three aspects of feasibility. The validity score for media was 142 out of 230 (medium category), while the material validation reached 110 out of 135 (high category). Practicality assessments showed very high results, with teachers assigning a score of 175 out of 172 indicators and students achieving an average score of 156.8, which placed the media in the very high category. Effectiveness was demonstrated by improved mathematical concept comprehension, where the pretest average of 75.24 increased to 84.38 in the posttest, meeting the minimum high category. Similarly, the self-directed learning questionnaire showed improvement, with average scores rising from 99.97 to 102.91, and the percentage of students attaining very high posttest results increased to 90.63%.
Learning Mathematics Through Videos Lines and Angles: How to Analyze Students' Understanding of Mathematical Concepts? Rohmah, Riska Nur; Setyaningrum, Wahyu
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 6, No 2 (2022): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v6i2.7403

Abstract

The use of technology through learning videos has a high-quality impact on students' understanding of mathematical concepts. However, the facts show that the use of learning videos has not been fully utilized, especially in the lines and angles material. The purpose of this research is to determine and describe students' understanding on lines and angles concepts through the use of instructional videos. This study is a qualitative descriptive approach which employed interviews of students' conceptual understanding after their taking a test. This research involved two seventh-grade students of a junior high schools in Tulungagung, namely AL and YL. Both research subjects have studied the material of lines and angles in mathematics learning through the use of mathematics learning videos. The two students in this study were also students with high learning achievement categories. The results obtained from this study stated that the average ability of students to understand mathematical concepts was 80 out of a maximum score of 100 which can be categorized a good level of conceptual understanding. This implies that mathematics learning videos can be used as an alternative for teachers and other researchers in conveying material, and training students' abilities in understanding mathematical concepts, especially lines and angles material. As for further research, students' ability to understand mathematical concepts can be supported by using worksheets, media, or other learning approaches on lines and angles material. 
Vocational High School Students Mathematical Communication: Auditory, Visual, and Kinesthetic Learners Mayang Purbaningrum; Wahyu Setyaningrum
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.31987

Abstract

Mathematical communication skills are essential in activating students' problem-solving abilities and activating excellent cognition. This study aims to analyze the mathematical communication skills conceived by vocational students on financial mathematics material according to auditory, visual, and kinesthetic learning styles. The study used descriptive qualitative with nine samples determined using a purposive sampling technique. Each learning style category comprised three quick, moderate, and slow students comprehending the given materials. The data were collected using a mathematical communication test and a learning style questionnaire. The obtained data were analyzed using Miles and Huberman's model. The results showed that students with an auditory learning style whose ability to comprehend material was quick and slow could complete mathematical communication indicators. In contrast, students with a moderate category could not complete the fourth indicator. Visual learners with quick material comprehension did not formulate situations mathematically, and all the categories did not comply with the fourth indicator. Kinesthetic learners with quick material comprehension could not complete the first and third indicators. The kinesthetic learner with slow comprehension could not fulfill the fourth indicator, while one in the moderate category could complete all mathematical communication indicators.
Pelatihan Implementasi Pembelajaran Mendalam (Deep Learning) Berbantuan Teknologi Digital pada Pembelajaran Matematika: Upaya Peningkatan Kompetensi Guru Sekolah Indonesia Cairo Wijaya, Ariyadi; Setyaningrum, Wahyu; Rosnawati, Raden; Caturiyati; Nugroho, Hery
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 10 No. 1 (2026): Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v10i1.91118

Abstract

Pembelajaran mendalam merupakan salah satu kebijakan baru Kementerian Pendidikan Dasar dan Menengah. Pembelajaran mendalam menekankan pada proses belajar yang bermakna, berkesadaran, dan menggembirakan bagi murid. Untuk mencapai tujuan tersebut proses belajar meliputi aktivitas memahami, mengaplikas, dan merefleksi. Selain itu proses pembelajaran perlu didukung beberapa aspek penunjang, salah satunya adalah pemanfaatan teknologi digital. Sebagai kebijakan baru, sebagian guru masih belum sepenuhnya memahami pembelajaran mendalam apalagi bagi guru di sekolah yang berada di luar negeri, salah satunya adalah Sekolah Indonesia Cairo. Oleh karena itu, pada artikel ini dibahas tentang pelatihan mengenai apa pembelajaran mendalam dan bagaimana implementasinya bagi guru Sekolah Indonesia Cairo. Lebih lanjut lagi ditekankan pula bagaimana pemanfaatan teknologi digital untuk mendukung pembelajaran mendalam. Hasil pelatihan menunjukkan bukan hanya animo tinggi dari peserta tetapi juga pemahaman peserta tentang pembelajaran mendalam yang semakin bagus. Kata kunci: pembelajaran matematika, pembelajaran mendalam, Sekolah Indonesia Cairo, teknologi digital
Pemanfaatan Media Berbasis Artificial Intelligence (AI) dalam pembelajaran di Sekolah untuk Meningkatkan Literasi Digital Setyaningrum, Wahyu; Waryanto, Nur Hadi; Sahid; Murdanu; Inayati, Syarifah
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 10 No. 1 (2026): Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v10i1.91125

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan literasi digital dan kemampuan guru matematika dalam memanfaatkan media berbasis Artificial Intelligence (AI) untuk pembelajaran. Program dilaksanakan melalui pelatihan berbasis praktik langsung (hands-on training) yang melibatkan 39 guru SMP di Kota Yogyakarta di bawah koordinasi Dinas Pendidikan Pemuda dan Olahraga. Kegiatan ini dirancang untuk memperkuat pemahaman guru terhadap konsep dasar AI, keterampilan penggunaan aplikasi berbasis AI seperti ChatGPT, Teasy, dan Gemini, serta kemampuan mengintegrasikan teknologi ke dalam pembelajaran matematika. Hasil evaluasi menunjukkan adanya peningkatan signifikan pada skor rata-rata pengetahuan dan keterampilan guru sebesar 38%, disertai perubahan mindset dari sikap pasif menjadi adaptif dan kreatif terhadap teknologi. Selain menghasilkan produk media pembelajaran berbasis AI, kegiatan ini juga berdampak pada terbentuknya komunitas guru literasi digital sebagai wadah kolaborasi dan pengembangan profesional berkelanjutan. Kegiatan ini membuktikan bahwa pelatihan berbasis praktik dan kolaboratif efektif dalam memperkuat kompetensi guru di era transformasi pendidikan digital.
Building Numeracy Interest and Ability: The Effectiveness of Digital Simulation Media for Junior High School Students Irsyad, Aan Nur; Setyaningrum, Wahyu
Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan Vol 17, No 2 (2026): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/paedagoria.v17i2.38366

Abstract

Low numeracy skills and declining learning interest among junior high school students represent a critical challenge in modern mathematics education. Traditional teaching methods often fail to bridge the gap in student engagement within increasingly digital learning environments. While digital simulations offer significant interactive potential to address these issues, their focused development and empirical testing for specific numeracy interventions remain insufficient. This study aimed to develop digital simulation media and evaluate its validity, practicality, and effectiveness in improving numeracy skills and learning interest independently. Using a Research and Development (R&D) approach with the ADDIE model, the media was tested on 32 eighth-grade students at an Indonesian public junior high school. Data were collected through numeracy tests, interest questionnaires, practicality assessments, and expert validation sheets. After confirming the normality assumption via Shapiro-Wilk, data analysis was conducted using paired sample t-tests and N-Gain scores. The results indicated that the media was deemed highly valid by both material and media experts. Teachers and students rated the media as "very practical" and "practical," respectively. Furthermore, the intervention independently improved both numeracy skills (p < 0.001; N-Gain = 0.62, medium category) and learning interest (p < 0.001; N-Gain = 0.31, medium category), with 75% of students achieving the minimum mastery standard. This study concludes that the developed digital simulation media is a valid, practical, and effective tool for enhancing students' cognitive numeracy skills and fostering their affective learning interest. It is recommended for broader implementation and further development.
THE EFFECTIVENESS OF RME AND SCIENTIFIC APPROACHES IN TERMS OF MATHEMATICAL LITERACY AND LEARNING INTEREST Margaretta, Shinta Bella; Andayani, Sri; Setyaningrum, Wahyu
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 15, No 1 (2026)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/ajpm.v15i1.13295

Abstract

AbstractStudents’ low levels of mathematical literacy and learning interest indicate a need for effective instructional approaches that can address both cognitive and affective learning outcomes. Comparative studies on the effectiveness of the RME and scientific approaches in improving mathematical literacy and learning interest remain limited, especially at the SMP level. This study examines the effectiveness of each approach and compares their impact on students’ mathematical literacy and learning interest. This study employed a quantitative approach using a pretest–posttest control group design. The population of the study consisted of all seventh-grade students at a public SMP in Yogyakarta. The sample comprised 64 students from two seventh-grade classes. The participants were selected using convenience sampling. The experimental group received RME-based instruction, while the control group was taught using the scientific approach. MANOVA results show that both approaches significantly improve mathematical literacy and learning interest. However, no significant difference was found between the two groups, as indicated by a p-value > 0.05. These findings suggest that both approaches are equally effective. The study provides insight for teachers in applying context-based learning. Future research may explore digital-based strategies to further support mathematical literacy and learning interest. AbstrakRendahnya tingkat literasi matematika dan minat belajar siswa menunjukkan perlunya pendekatan yang efektif untuk mengembangkan hasil belajar kognitif maupun afektif. Penelitian komparatif mengenai efektivitas pendekatan RME dan pendekatan saintifik dalam meningkatkan literasi matematika dan minat belajar masih terbatas, khususnya di tingkat SMP. Penelitian ini bertujuan mengkaji efektivitas masing-masing pendekatan dan membandingkan pengaruhnya terhadap literasi matematika dan minat belajar siswa. Penelitian ini menggunakan pendekatan kuantitatif dengan desain pretest–posttest kelompok kontrol. Populasi penelitian terdiri atas seluruh siswa kelas VII di salah satu SMP negeri di Yogyakarta. Sampel penelitian berjumlah 64 siswa yang berasal dari dua kelas VII. Partisipan dipilih menggunakan teknik convenience sampling. Kelompok eksperimen diajar dengan pendekatan RME, sedangkan kelompok kontrol menggunakan pendekatan saintifik. Hasil analisis MANOVA menunjukkan bahwa kedua pendekatan efektif dalam meningkatkan literasi matematika dan minat belajar siswa. Namun, tidak terdapat perbedaan signifikan antara kedua kelompok (nilai p > 0.05), yang berarti keduanya memiliki efektivitas yang setara. Temuan ini memberikan wawasan bagi guru dalam menerapkan pembelajaran berbasis konteks. Penelitian lanjutan dapat mengeksplorasi integrasi teknologi untuk mendukung pengembangan literasi matematika dan minat belajar.
Numeracy and Growth Mindset Profiles as a Basis for Differentiated Guidance Service in Islamic Schools Setyaningrum, Wahyu; Nugroho, Hery; Sofiatun, Isna; Wijaya, Ariyadi
Islamic Guidance and Counseling Journal Vol. 9 No. 1 (2026): Islamic Guidance and Counseling Journal
Publisher : Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung in collaboration with Asosiasi Bimbingan dan Konseling Indonesia (ABKIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25217/0020269700400

Abstract

Up to present, guidance and counseling (GC) services in Islamic schools tend to be homogeneous, often overlooking the diversity of students’ characteristics. This practice overlooks the effectiveness of differentiated guidance. Key factors worth considering for differentiating guidance services are numeracy skills and growth mindset (GM). In this regard, this study aims to: (1) cluster students based on their numeracy skills and GM with K-means techniques; (2) interpret the clusters’ characteristics; and (3) recommend data-driven GC service strategies. Quantitative method K-means clustering was applied to 321 grade VIII students from Islamic junior secondary schools in two provinces in Indonesia. Data from numeracy test and GM questionnaire were analyzed using the Elbow, Silhouette, Kruskal-Wallis, and Dunn post-hoc methods. The result of the study revealed three student clusters: (1) low numeracy and low GM (Double Susceptible); (2) high numeracy and moderate-to-high GM (Empowered); and (3) low numeracy but high GM (Affective Potential). Findings confirm that numeracy skills and GM do not always align, underscoring the need for integrated cognitive and affective interventions. Significant differences in numeracy skills and GM distribution were found between clusters. The different characteristics between clusters lead to diverse service strategies offered for each cluster. These strategies include a cognitive distortion journaling and belief disputes for double susceptible students; career visualization and leadership simulation for empowered students; and mathematical mindfulness and emotion regulation for affective potential students. Data-driven GC services are crucial in supporting students' academic and psychological development.
Students’, Pre-Service Mathematics Teachers’, and In-Service Mathematics Teachers’ Perception on Calculus Learning Video Shelly Lubis; Wahyu Setyaningrum; Abdul Halim Abdullah; Muhamad Rizky Al Gafari; Habibullah Habibullah
EduMa: Mathematics education learning and teaching Vol. 10 No. 2 (2021)
Publisher : Jurusan Tadris Matematika UIN Siber Syekh Nurjati Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24235/eduma.v10i2.8599

Abstract

Calculus is a branch of mathematics that must be studied in school, especially at the high school level. One of the subjects in calculus is the application of integral on the volume of solid of revolution. The use of learning video as media can help students in a conceptual understanding of the volume of solid of revolution, which is one of the abstract objects in calculus. This article discusses the development of solid revolution learning videos' volume. It describes students' perception, pre-service mathematics teachers, and in-service mathematics teachers in the video. The subjects who participated in this study were 48 students in grade 12 in one state high school in Sambas Regency, West Borneo, 8 pre-service mathematics teachers of one of the universities in Yogyakarta, and 3 high school mathematics teachers in Sambas Regency. Data were collected by using a questionnaire consisting of several open questions. Through open questions, subjects were intended to express their ideas or opinions about the learning video. The finding showed that most respondents have positive perceptions of calculus learning video. 76,74% of students agree that the video is suitable for use at the beginning of learning this subject; all in-service mathematics teachers agree, and 75% of pre-service mathematics teachers also agree. This indicates that the learning video can be used as one of the teaching aids in the learning of solid revolution
Co-Authors Abdul Halim Abdullah Abdullah, Abdul Halim Abdullah, Abdul Halim Abu Yazid Raisal Adi Susanto Al Gafari, Muhamad Rizky Ali Mahmudi Ali, Mohamad Bilal Ali, Mohamad Bilal Aminuyati Annis Deshinta Ayuningtyas Aoyama, Kazuhiro Arif Sapta Mandala Ariyadi Wijaya Atmini Dhoruri Azizah, Nur Lailatul Caturiyati Caturiyati Caturiyati Depi Ardian Nugraha Dhoriva Urwatul Wutsqa Dita Aldila Krisma Dyah Ayu Puspita Ardani Edward E. Pandelaki, Edward E. Eka Purwanto , Ungsari Rizki Eka Purwanto, Ungsari Rizki Elly Arliani Emas Marlina Erlyanna Nur Risqi Ervina Lutfiyati Fabian, Khristin Fadilla Camellia Fanggidae, Janrino Junus Rivaldi Fitriana Yuli Saptaningtyas Franyoto, Yuvianti Dwi Gunawan Gunawan Guntur, Muhamad Ikhsan Sahal Habibie, Akmal Hibban Habibullah Habibullah Habibullah, Habibullah Hakim, Nur Akmalul Handayawati, Ponco Hartono Hartono Heri Retnawati Hery Nugroho, Hery Hidayati, Diah Nur Himmawati Puji Lestari I Bagiana Ika Puspitaningrum Ilham Rizkianto Inayati, Syarifah Indar Prabowo Inggri Ramadhani Widigda Irdatul Fitri Irsyad, Aan Nur Jailani Jailani Jaslin Ikhsan Kana Hidayati Kazuhiro Aoyama Khasanah Rahma Wati Kismiantini Kismiantini Koes Sundoro , Aries Koes Sundoro, Aries Kusmita , Lia Kuswari Hernawati La Ode Adin Hasrun Bici Laras Setyowati Loviga Denny Pratama Loviga Denny Pratama Loviga Denny Pratama Lubis, Shelly Lusyana, Evvy Maharani, Ika Dewi Fitria Mahmudah, Faisa Nirbita Mami Hastuti Margaretta, Shinta Bella Maria Ulfah Marsigit Marsigit Marsigit Mayang Purbaningrum Meilina, Dika Dwi Melda Datu Kalu Mohamad Bilal Ali Muhamad Rizky Al Gafari Muhammad Faisal Muhammad Fauzan Murdanu Mutmainah Mutmainah Myelnawan Myelnawan Nanny Setiawati Hadirahardja, Maria Caecilia Nasution, Sela Lufita Salim Nauqi Aprilia Putri Noordin, Muhamad Kahir bin Nopi Tri Utami Novi Andri Nurcahyono Nur Hadi Waryanto Nur Insani Nur'aini Muhassanah Nurhikmah Widi Asriani Nurul Indah Septianisha Nuthfah Faijah Pangestu, Saka Aji Pastoriko, Fransiskus Magnis Pratama, Loviga Denny Pratama, Loviga Denny Pulungan, Delyanti Azzumarito Purwoko, Agus Puspita, Geni Raden Rosnawati Ramadhan, Sahrul Rastuti, Musafir Ratna Rustina Ratri Murdy Andari Raudya Thauzahra Rhomiy Handican Risna Amelia Rohmah, Riska Nur Sahid Sahrul Ramadhan Salsabila, Nilza Humaira Saragih, Novilda Angela Shelly Lubis Shinta Bella Margaretta Simangunsong, Alfauzan Ramadhanny Sintia Wulandari Siti Munisih Siti Ruqoyyah Sofiatun, Isna Sri Andayani Sri Andayani Sri Suryaningtyas Sugiman Sugiman Sugiman Sugiman Sugiman Sugiman Suprapti, Atik - Syukrul Hamdi Titi Adriani Hakim Tuharto Tuharto Vepi Apiati Vivi RR Rianto Yanuar Hery Murtianto Yanuarita, Heylen Amildha Ying, Chiang Yi Yosafat Ardian Kristiarta