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All Journal Jurnal Pendidikan Matematika Jurnal Elektronik Pendidikan Matematika Tadulako AKSIOMA Jurnal Pendidikan Matematika Kreatif SIGMA: Jurnal Pendidikan Matematika AKSIOMA Jurnal Gantang HISTOGRAM: Jurnal Pendidikan Matematika JMPM: Jurnal Matematika dan Pendidikan Matematika Journal of Honai Math Jurnal Pendidikan Matematika (JUDIKA EDUCATION) Jurnal Cendekia : Jurnal Pendidikan Matematika Prima: Jurnal Pendidikan Matematika Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah di Bidang Pendidikan Matematika SIGMA JPP (Jurnal Pendidikan dan Pembelajaran) Journal of Classroom Action Research Studies in Philosophy of Science and Education Aksioma DedikasiMU: Journal of Community Service Postulat : Jurnal Inovasi Pendidikan Matematika Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia JME (Journal of Mathematics Education) Jurnal Pendidikan MIPA Mathematics Education Journal Jurnal Elektronik Pendidikan Matematika Tadulako JME (Journal of Mathematics Education)
Rita Lefrida
Mathematics Education Study Program, Faculty Of Teacher Training And Education, Universitas Tadulako
Religion Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Physics Social Sciences Other

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Mathematical Communication Skills of Female Students in Solving Derivative Problems Ratna Dwi Oktavia; Rita Lefrida; Alfisyahra Alfisyahra; Pathuddin Pathuddin
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 12, No 3: July 2024
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v12i3.12439

Abstract

This study aimed to examine the mathematical communication skills of female students in solving derivative problems in the eleventh grade at SMA Negeri 1 Sigi. The research followed a qualitative approach with a descriptive design. The study sample consisted of three female students selected based on a questionnaire focusing on feminine gender traits. Data were collected through written tests, interviews, and direct observation of the subjects. The dependability and credibility techniques were used to ensure the quality of the research findings. Data analysis involved three stages: data condensation, data presentation, and drawing conclusions. This study contributes to the existing literature by addressing the gap in understanding the mathematical communication skills of students with feminine gender traits, specifically in the context of solving derivative problems. The uniqueness of this study lies in the use of a feminine questionnaire for subject selection and the integration of mathematical language with everyday language and physical gestures in the evaluation of mathematical ideas. The findings revealed that female students with feminine gender traits demonstrated proficiency in all indicators of mathematical communication skills, including: (1) the ability to communicate their mathematical thoughts coherently and clearly to their peers and teachers; (2) effective use of mathematical language, such as numbers, letters, symbols, charts, graphs, and logical connections, in conjunction with everyday language and physical gestures when presenting, solving, and evaluating mathematical ideas during interactions with others; and (3) the capacity to explain mathematical ideas, situations, or relationships in written form. These results suggest that approaches combining mathematical language with physical interaction and everyday language can enhance the effectiveness of mathematical communication. The findings of this research can be utilized as a foundation for developing more inclusive and adaptive teaching strategies that consider gender differences in mathematics education.
Concept Understanding Students on the Two-Variables Linear Equation System Material in Terms of Mathematics Ability Rahmadiani Rahmadiani; Alfisyahra Alfisyahra; Rita Lefrida; Pathuddin Pathuddin
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 12, No 1: January 2024
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v12i1.10532

Abstract

The purpose of this study was to describe the concept understanding ability of students in solving the problem of two-variable linear equation system. The method used is descriptive qualitative research. The subject of this research was 3 students taken from 26 students of class VIII SMPN 1 Balaesang. The results showed that the concept understanding of high mathematics ability students in restating concepts can restate concepts well using their own language, identify examples and non-examples and classify objects according to certain properties in accordance with the concept that can make mathematical modelling and determine equations and use the right solution steps according to the concept algorithmically. The concept understanding of medium ability students in restating concepts has been able to state concepts using their own sentences, identify examples and non-examples and are still lacking in classifying objects according to certain properties in accordance with the concept. The concept understanding of low ability students has not been able to achieve all indicators of concept understanding. Therefore, concept understanding is very important to be mastered by every student and the role of the teacher in facilitating the ability of each student.
Implementasi Model Pembelajaran Two Stay Two Stray untuk memperbaiki Komunikasi Matematika Siswa Kelas XII XII-2 SMAN Model Terpadu Madani Razi, Muhammad Fahrur; Sasongko, Luddy Bambang; Lefrida, Rita
Postulat : Jurnal Inovasi Pendidikan Matematika Vol 4 No 2 (2023): Desember 2023
Publisher : Universitas Muhammadiyah Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30587/postulat.v4i2.7385

Abstract

In learning students convey the results of their work is not always easy to accept. This is because their level of mathematical communication is not high. To improve their communication skills, a learning model that emphasizes communication aspects is needed, one of these models is two stay two stray. For this reason, through this study to improve students' mathematical communication skills, the two stay two stray learning model was applied to the limit material of trigonometric functions. This research was conducted on students of class XII-2 of Madani Integrated Model Senior High School in the 2022/2023 school year. This research is a collaborative classroom action research (PTK) which is carried out in 2 learning cycles. The results of the research in cycle 1 get the level of mathematical communication skills of student A is at level 1, student B is at level 2, student C is at level 3. Then revisions were made in cycle 2 learning to get the results of student A at level 2, student B at level 3 and student C at Level 3. From these results it can be concluded that learning mathematics by applying the two stay two stray type cooperative learning model can improve mathematical communication skills for students who have low and medium abilities.Keywords : Two stay two stray, Mathematical Communication
A Developmental Study of Junior High School Mathematics Instructional Media Guided from Humanity-Value of Learning Model (MPNK) to Prevent Juvenile Delinquency Murdiana, I Nyoman; Lefrida, Rita
JPP (Jurnal Pendidikan dan Pembelajaran) Vol 24, No 1 (2017)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um047v24i12017p020

Abstract

Abstract: The Research and Development study aimed to develop a instructional media for math lesson using valid, practical, and effective humanity-value teaching model to prevent juvenile delinquency. To achieve the objective, the prototypical study was conducted using 3 phase development, namely (1) early assessment phase or front-end analysis, (2) the development phase consisting of expert validation and tryout I, and (3) the evaluation phase through tryout II using a quasi experiment design with anacova data analysis. The result from the first year development (2015) was the instructional media for junior high school using a valid humanity-value teaching model to prevent various kinds of juvenile delinquency. The products developed from the current research were in the form of lesson plan, teacher’s book, student book, and student worksheets. The products were in the form of draft of the instructional set which was valid.Keywords: instructional media, junior high school, mathematics, MPNK modelAbstrak: Penelitian ini merupakan penelitian pengembangan untuk menghasilkan perangkat pembelajaran matematika SMP berpandu Model Pembelajaran Nilai Kemanusiaan (MPNK), yang valid, praktis, dan efekktif guna mencegah kenakalan remaja.Untuk mencapai tujuan tersebut, maka jenis penelitian yang digunakan adalah prototypical studies melalui tiga tahap pengembangan. Tiga tahap tersebut yakni: (1) fase hulu hilir, (2) fase pengembangan melalui kegiatan validasi oleh pakar dan kegiatan uji coba I; (3) fase penilaian melalui kegiatan uji coba II dengan rancangan “Quasi- Expriment” dan datanya dianalisis dengan Anacova. Hasil yang telah diperoleh untuk pengembangan tahun I (2015) adalah produk perangkat pembelajaran matematika SMP berpandu MPNK, yang valid dalam rangka mencegah berbagai bentuk kenakalan remaja. Produk yang telah diperoleh dari hasil penelitian ini berupa Rencana Pelaksanaan Pembelajaran (RPP), Buku Guru, Buku Siswa, dan Lembar Kerja Siswa. Produk tersebut berupa Draft Perangkat Pembelajaran yang telah memenuhi kualitas valid.Kata kunci: matematika, model MPNK, perangkat pembelajaran, SMP
ANALYSIS OF STUDENTS' ERRORS IN SOLVING PROBLEMS ON THE MATERIAL OF ROWS AND SERIES IN CLASS VIII MTS SYEKH LOKIYA TOWALE Nurhaliza, Sitti; Alfisyahra, Alfisyahra; Lefrida, Rita; Pathuddin, Pathuddin
Prima: Jurnal Pendidikan Matematika Vol 8, No 2 (2024): PRIMA : Jurnal Pendidikan Matematika
Publisher : FKIP Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/prima.v8i2.10825

Abstract

Penelitian ini bertujuan untuk mendeskripsikan jenis-jenis kesalahan yang dilakukan siswa kelas VIII MTs Syekh Lokiya Towale dalam menyelesaikan masalah matematika berdasarkan Analisis Kesalahan Newman . Jenis penelitian ini adalah penelitian kualitatif dengan pendekatan deskriptif. Teknik pengumpulan data dalam penelitian ini adalah tes tertulis dan wawancara berupa 2 soal esai dan pedoman wawancara. Teknik wawancara yang digunakan adalah semi terstruktur yang dilakukan terhadap siswa terpilih untuk memastikan jenis kesalahan yang dilakukan dalam menyelesaikan masalah. Subyek dalam penelitian ini dipilih berdasarkan perbedaan gender yaitu satu siswa laki-laki dan satu siswa perempuan dengan pertimbangan siswa yang paling banyak melakukan kesalahan, mampu berkomunikasi dengan baik dan rekomendasi dari guru matematika. Hasil penelitian ini menunjukkan bahwa kesalahan yang dilakukan subjek laki-laki (SL) adalah kesalahan pemahaman (comprehension error) , kesalahan keterampilan proses ( process skill error ) dan kesalahan penulisan jawaban akhir ( encoding error) . Kesalahan yang dilakukan subjek perempuan (SP) adalah kesalahan keterampilan proses ( process skill error) dan kesalahan penulisan jawaban akhir ( kesalahan coding) . 
PROFILE OF MATHEMATICAL COMMUNICATION SKILLS OF CLASS VIII MTS AL-KHAIRAAT TONDO STUDENTS ON RELATION AND FUNCTION MATERIAL IN TERMS OF SELF-CONFIDENCE Amelia, Risna; Alfisyahra, Alfisyahra; Lefrida, Rita; Pathuddin, Pathuddin
Prima: Jurnal Pendidikan Matematika Vol 8, No 2 (2024): PRIMA : Jurnal Pendidikan Matematika
Publisher : FKIP Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/prima.v8i2.10714

Abstract

Penelitian ini merupakan peneltian deskriptif kualitatif dengan subjek peneltian Siswa kelas VIII MTs Al-Khairaat Tondo. Tujuan dari penelitian ini adalah untuk memperoleh gambaran kemampuan komunikasi matematis siswa kelas VIII A pada materi relasi dan fungsi berdasarkan self-confidence. Subjek penelitian ini dipilih berdasarkan angket self-confidence. Subjek penelitian ini adalah 3 orang siswa dari 17 siswa kelas VIII A MTs Al-khairaat Tondo, yang masing-masing memiliki self-confidence tinggi, sedang dan rendah. Data di kumpulkan dengan menggunakan metode angket, tes tertulis dan wawancara. Teknik analisis data yang digunakan yaitu kondensasi data, penyajian data dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa subjek self-confidence tinggi memenuhi tiga indikator yaitu 1) menyatakan situasi, gambar, atau diagram kedalam bahasa, simbol, atau gagasan/ide matematis dengan tepat baik secara lisan maupun tulisan; 2) menggunakan respresentasi matematika (diagram, grafik) untuk menyatakan informasi matematis 3) mengkomunikasikan kesimpulan jawaban baik secara lisan maupun tulisan. Subjek self-confidence sedang memenuhi dua indikator yaitu 1) menyatakan situasi, gambar, atau diagram kedalam bahasa, simbol, atau gagasan/ide matematis dengan tepat baik secara lisan maupun tulisan; 2) menggunakan respresentasi matematika (diagram, grafik) untuk menyatakan informasi matematis. Subjek self-confidence rendah memenuhi satu indikator yaitu 1) menggunakan respresentasi matematika (diagram, grafik) untuk menyatakan informasi matematis).
Profil Pemahaman Konsep Matematika Siswa dalam Menyelesaikan Soal Persamaan Garis Lurus Ditinjau dari Self Efficacy Wirdania, Wirdania; Pathuddin, Pathuddin; Lefrida, Rita; Alfisyahra, Alfisyahra
Jurnal Pendidikan Matematika : Judika Education Vol 7 No 1 (2024): Jurnal Pendidikan Matematika : Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/judika.v7i1.9414

Abstract

This research aims to describe the understanding of mathematical concepts among 8th-grade students of SMP Negeri 15 Palu, specifically focusing on self-efficacy in the topic of linear equations. The type of research conducted is descriptive, utilizing a qualitative approach. The research method employed is the member-check method. The subjects selected for this study were 3 students from class VIII A of SMP Negeri 15 Palu, representing high, moderate, and low levels of self-efficacy as determined from the results of a self-efficacy questionnaire. They were subsequently administered a test on mathematical concept comprehension. The results of the research indicate that students with high self-efficacy demonstrate a very good understanding of mathematical concepts, mastering all concept comprehension indicators. Meanwhile, students with moderate self-efficacy master some indicators, and students with low self-efficacy only master the indicator of restating concepts. Thus, it can be concluded that subjects with high self-efficacy have a very good understanding of mathematical concepts, while subjects with moderate self-efficacy have a sufficiently good understanding, and those with low self-efficacy have a less adequate understanding of mathematical concepts. Keywords: Self Efficacy, Understanding of Mathematics Concepts
Profil Pemahaman Konsep Teorema Pythagoras Siswa Ditinjau dari Kemampuan Matematika Fani, Sri; Alfisyhara, Alfisyhara; Lefrida, Rita; Pathuddin, Pathuddin
Jurnal Pendidikan Matematika : Judika Education Vol 7 No 2 (2024): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/judika.v7i2.9495

Abstract

This research aims to describe students' understanding of the concept of the Pythagorean theorem in class VIII of SMP Negeri 3 Banawa in terms of mathematical ability. The method used in this research is triangulation, data was collected through written tests and interviews. The results of this study showed that ST subjects were able to explain the third indicator given by the researcher. Subject SS could not explain the second indicator because the subject did not understand the cardinal directions so that it affected the third indicator, subject SS could not complete it. SR subjects could not explain the three indicators. In conclusion, students with high mathematical abilities can fulfill the indicators in restating concepts and presenting concepts in the form of mathematical representations (images), and some fulfill the indicators in using certain operating procedures in solving Pythagorean theorem problems. Students with moderate mathematical abilities only partially meet the indicators for restating and presenting concepts in the form of mathematical representations, but have not yet met the indicators for using certain operating procedures. Meanwhile, students with low mathematical abilities only partially fulfill the indicators in restating concepts, but do not meet the indicators in presenting concepts in the form of mathematical representations or in using certain operating procedures. Keywords: Concept Understanding, Pythagorean Theorem, Maths Ability.
MENINGKATKAN MINAT DAN PEMAHAMAN KONSEP TRIGONOMETRI MELALUI VIDEO DAN GAME INTERAKTIF (KAHOOT) DI KELAS X-4 SMAN MODEL TERPADU MADANI PALU Sari, Septi Rahmita; Kamaruddin, Kamarudin; Lefrida, Rita
SIGMA: JURNAL PENDIDIKAN MATEMATIKA Vol 16, No 2: Desember 2024
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/sigma.v16i2.16712

Abstract

Penelitian ini bertujuan untuk meningkatkan minat dan pemahaman konsep trigonometri pada siswa kelas X-4 SMAN Model Terpadu Madani Palu melalui penelitian tindakan kelas. Penelitian dilaksanakan dalam dua siklus, yang masing-masing mencakup tahapan perencanaan, pelaksanaan, observasi, dan refleksi. Media pembelajaran berupa video dan platform interaktif Kahoot diintegrasikan ke dalam proses belajar mengajar untuk membuat pembelajaran lebih menarik dan interaktif. Data dikumpulkan melalui observasi, tes hasil belajar, serta angket respon siswa. Hasil penelitian menunjukkan adanya peningkatan signifikan pada nilai rata-rata siswa, khususnya pada siklus kedua dibandingkan dengan siklus pertama. Selain itu, partisipasi aktif siswa dalam pembelajaran meningkat secara substansial. Berdasarkan analisis angket, mayoritas siswa menyatakan bahwa penggunaan media pembelajaran ini membuat mereka lebih tertarik dan termotivasi dalam mempelajari trigonometri. Hasil penelitian ini menunjukkan bahwa kombinasi video dan Kahoot tidak hanya membantu siswa memahami konsep dengan lebih baik, tetapi juga menciptakan suasana pembelajaran yang menyenangkan dan interaktif. Strategi ini dapat menjadi alternatif yang efektif dalam meningkatkan kualitas pembelajaran matematika, khususnya pada materi trigonometri, dan mendorong partisipasi siswa secara aktif dalam proses pembelajaran
Application of the Problem Based Learning (PBL) Learning Model Using the Peer Tutor Method to Improve the Mathematical Problem Solving Ability of Class XI-1 Students at SMAN Madani Integrated Model Arnisah, Sitti; Tajudin, Tajudin; Lefrida, Rita
AURELIA: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Vol 4, No 1 (2025): January 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/aurelia.v4i1.4343

Abstract

This research aims to obtain a description of the application of the Problem Based Learning (PBL) learning model using the peer tutoring method to improve the mathematical problem solving abilities of class XI-1 students at SMAN Madani Integrated Model. The subjects of this research were 36 Madani Integrated Model SMAN students and 6 people were selected to serve as tutors and 3 people were selected as informants and 6 heterogeneous study groups were formed. The results of the research show that the application of the Problem Based Learning (PBL) learning model using the peer tutoring method can improve the mathematical problem solving abilities of class XI-1 students at SMAN Madani Integrated Model. This can be seen from the results of students' written tests which show that students' mathematical problem solving abilities have increased from cycle I to cycle II. Problem solving ability in cycle I had an average percentage of 55.56% which was classified as medium criteria, then in cycle II it increased to 82.63% which was classified as very high criteria. In the indicator of understanding the problem, it was found that the average percentage in cycle I was 61.11%, increasing to 83.33% in cycle II. In the indicator of making a problem solving plan, it was found that the average percentage in cycle I was 55.56%, increasing to 88.89% in cycle II. In the indicator of completing the problem solving plan, it was found that the average percentage in cycle I was 50.00%, increasing to 80.56% in cycle II. In the indicators for interpreting the results obtained, the percentage in cycle I was 55.56%, increasing to 82.63% in cycle II. Apart from that, students' classical learning completeness showed that there was an increase in the average score in cycle I, namely 71.94, increasing to 80.13. In cycle I, it showed that the percentage of students who achieved the KKM score was 72.22%, where students had not yet achieved the criteria for success in the action. Then in cycle II it increased to 91.67% so that the success indicator had been achieved.
Co-Authors Abd. Hamid ABDUL HAMID Abdul Hamid AGUNG LUKITO Agung Lukito Alfisyahra Alfisyahra Alfisyahra Alfisyahra Alfisyahra Alfisyahra Alfisyahra, Alfisyahra Alfisyhara, Alfisyhara Amelia, Reski Amelia, Risna Ana Puji Lestari Ana Puji Lestari Anggraini Anggraini Anggraini Arivi, Maharani Agustina Arnisah, Sitti Asyita, Asyita Auliyah, Rifqah Awaludin Awaludin, Awaludin Baharuddin Paloloang Bakri Bakri Bakri M Bakri M Bakri M Bakri Mallo Baso Amri Baso Amri Besse Nur Anisa Dahlan, Rahmawati Dahlia Dahlia Dasa Ismaimuza Desti Pujiarsih Dini Miranda Dwi Warli Dyah Permata Elsa Febriasari Evie Awuy Fahrur Razi Faisal Faisal Fani, Sri Fazlika, Jihan Febriasari, Elsa Fitriyanti, Winda Gandung Sugita Haerani, Novianti Hasbi, Muh Hermin, Arwini Puspita Hikber Todongi Husna, Radhiatul I Made Sudarsana I Nyoman Murdiana I Nyoman Murdiana Ibni Hadjar Ibnu Hadjar Ika Citra Pratiwi Jaeng, Maxinus Jihan Fazlika Julian, Rofi S Kamaruddin, Kamarudin Kamarudin Kamarudin Kanarasi, Yabes Maxrobin Karindah, Elis Safira Kevin Angryawan Rumba Khasanah, Tri Nur Lembang, Ulvina Tangke M, Bakri Mahdayani Mahdayani, Mahdayani Marinus B. Tandiayuk Marinus B. Tandiayuk Marnita Martina Martina Maxinus Jaeng Meliani Mansur Mirnawati Muin Mohamad Ruslan Lainawa MUFIDAH Mufidah Mufidah Muh Hasbi Muh Ikbal Almahdali Muh. Hasbi Muh. Hasbi Muh. Rizal Muh. Rizal Muhammad Fitrah Muhammad Fitrah, Muhammad Muin, Mirnawati Mustamin Idris MUSTAMIN IDRIS Ningrum, Ing Diar Maswal Ningsih, Firnawati Adia Nisa, Ainun Nita Nita Nita Nita Nur Islamiah Nur Islamiyah Nur' Ain Nur’aini, Jafar Nurhalizah Nurhalizah Nurhalizah Nurhalizah Nurhayadi Nurhikma, Nurhikma Nurviani Alamanda Nur’aini Jafar Pathuddin Pujiarsih, Desti Purwanindina, Atila Maheswari Dewi Rahmadiani Rahmadiani Rahmawati Dahlan Ratna Ratna Dwi Oktavia Razi, Muhammad Fahrur Reski Amelia Rezki Lola Yunita Rezky Hari Sentosa Rizal, Muh Rizki Amalia Sy Pau Rochmat Wijaya Rofi Julian S Rydwan Balo Sabila B, Dini Nurul Sari, Septi Rahmita Sasongko, Luddy Bambang Selmi Selmi, Selmi Sentosa, Rezky Hari Sinta, Selviana Siti Hardiyanti Siti Hardiyanti Sitti Nurhaliza Sudarman Bennu Sudarsono Sukayasa Sutji Rochaminah Syamsiar Syamsiar, Syamsiar Tajudin Tajudin Tatag Yuli Eko Siswono Tatag Yuli Eko Siswono Tegoeh S Karniman Tegoeh S. Karniman Tina Warli, Dwi Welli Meinarni Wijaya, Rochmat Winda Fitriyanti Wirdania, Wirdania Wisilayasa, I Gede Darma