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Omay Sumarna
Universitas Pendidikan Indonesia, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Neuroscience Physics Social Sciences Other

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THE STUDY OF MENTAL MODEL ON N-HEXANE-METHANOL BINARY SYSTEM (THE VALIDATION OF PHYSICAL CHEMISTRY PRACTICUM PROCEDURE) Albaiti, Albaiti; Liliasari, Liliasari; Sumarna, Omay
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5783

Abstract

N-hexane and methanol systen is one example of a binary system that shows the solubility properties of reciprocity. This study aimed to assess the mental model of a n-hexane-methanolbinary system. Interaction at the submicroscopic level between n-hexane and methanol molecules is described in the form of mental model. Penelitian ini menggunakan cloud point method untuk memperoleh data kesetimbangan cair-cair sistem n-heksana-metanol. This study used a cloud point method to obtain data on liquid-liquid equilibrium on the system of n-hexane-methanol. Research data showed the maximum critical temperature (above the consolute temperature) of this system was at 42.95 °C with Xmethanol = 0.475 (P= 715 mmHg). Data from the laboratory observations was representedas a symbolic level in the form of the curve of correlation between mole fraction of methanol with temperature in a phase diagram system of n-hexane-methanol. The curve that was formed was asymmetric. It indicated that the solubility of n-hexane in methanol was relatively small compared to the solubility of methanol in n-hexane. Mental model of the binary system of n-hexane-methanol in four curve areasin the form of visualization of the interaction between n-hexane and methanol molecules through London force. In thermodynamics, each component had the same chemical potential inboth phases at equilibrium state. This study results could have a contribution to form a mental model on the student as the prospective chemistry subject teachers.
IONIC LIQUIDS MATERIAL AS MODERN CONTEXT OF CHEMISTRY IN SCHOOL Hernani, Hernani; Mudzakir, A.; Sumarna, O.
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5791

Abstract

One way to improve students’ chemistry literacy which is demanded in the modernization of modern technology-based chemistry learning is by studying ionic liquids. Low level of scientific literacy of students in Indonesia as revealed in the PISA in 2012 was the main reason of the research. Ionic liquids-based technology are necessary to be applied as a context for learning chemistry because: (1) the attention of the scientific an technology community in the use of ionic liquids as a new generation of green solvent, electrolyte material and fluidic engineering in recent years becomes larger, in line with the strong demands of the industry for the provision of new materials that are reliable, safe, and friendly for various purposes; (2) scientific explanations related to the context of the ionic liquid contains a lot of facts, concepts, principles, laws, models and theories can be used to reinforce the learning content as a media to develop thinking skill (process/competence) as demanded by PISA; (3) The modern technology-based ionic liquid can also be used as a discourse to strengthen scientific attitude. The process of synthesis of ionic liquid involves fairly simple organic reagents, so it deserves to be included in the chemistry subject in school.
IONIC LIQUIDS MATERIAL AS MODERN CONTEXT OF CHEMISTRY IN SCHOOL Hernani, Hernani; Mudzakir, A.; Sumarna, O.
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5791

Abstract

One way to improve students’ chemistry literacy which is demanded in the modernization of modern technology-based chemistry learning is by studying ionic liquids. Low level of scientific literacy of students in Indonesia as revealed in the PISA in 2012 was the main reason of the research. Ionic liquids-based technology are necessary to be applied as a context for learning chemistry because: (1) the attention of the scientific an technology community in the use of ionic liquids as a new generation of green solvent, electrolyte material and fluidic engineering in recent years becomes larger, in line with the strong demands of the industry for the provision of new materials that are reliable, safe, and friendly for various purposes; (2) scientific explanations related to the context of the ionic liquid contains a lot of facts, concepts, principles, laws, models and theories can be used to reinforce the learning content as a media to develop thinking skill (process/competence) as demanded by PISA; (3) The modern technology-based ionic liquid can also be used as a discourse to strengthen scientific attitude. The process of synthesis of ionic liquid involves fairly simple organic reagents, so it deserves to be included in the chemistry subject in school.
THE STUDY OF MENTAL MODEL ON N-HEXANE-METHANOL BINARY SYSTEM (THE VALIDATION OF PHYSICAL CHEMISTRY PRACTICUM PROCEDURE) Albaiti, A.; Liliasari, L.; Sumarna, O.
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5783

Abstract

N-hexane and methanol systen is one example of a binary system that shows the solubility properties of reciprocity. This study aimed to assess the mental model of a n-hexane-methanolbinary system. Interaction at the submicroscopic level between n-hexane and methanol molecules is described in the form of mental model. Penelitian ini menggunakan cloud point method untuk memperoleh data kesetimbangan cair-cair sistem n-heksana-metanol. This study used a cloud point method to obtain data on liquid-liquid equilibrium on the system of n-hexane-methanol. Research data showed the maximum critical temperature (above the consolute temperature) of this system was at 42.95 °C with Xmethanol = 0.475 (P= 715 mmHg). Data from the laboratory observations was representedas a symbolic level in the form of the curve of correlation between mole fraction of methanol with temperature in a phase diagram system of n-hexane-methanol. The curve that was formed was asymmetric. It indicated that the solubility of n-hexane in methanol was relatively small compared to the solubility of methanol in n-hexane. Mental model of the binary system of n-hexane-methanol in four curve areasin the form of visualization of the interaction between n-hexane and methanol molecules through London force. In thermodynamics, each component had the same chemical potential inboth phases at equilibrium state. This study results could have a contribution to form a mental model on the student as the prospective chemistry subject teachers.
STUDI LAPANGAN PENGEMBANGAN PROFESIONALISME GURU SEKOLAH DASAR Hayu, Wiworo Retnadi Rias; Permanasari, Anna; Sumarna, Omay; Hendayana, Sumar
DIDAKTIKA TAUHIDI: Jurnal Pendidikan Guru Sekolah Dasar Vol. 6 No. 2 (2019): Didaktika Tauhidi: Jurnal Pendidikan Guru Sekolah Dasar
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.982 KB) | DOI: 10.30997/dt.v6i2.1952

Abstract

Pelatihan merupakan kegiatan penting bagi guru untuk selalu mengenerasi ilmu pengetahuannya, tidak hanya peserta didik yang diharapkan mengembangkan ilmu pengetahuan namun pendidik juga berkewajiban untuk menguatkan kompetensi bidang. Pelatihan yang sering diadakan belum menyeluruh dan masih tergolong langka untuk sekolah-sekolah tertentu. Oleh sebab itu, gambaran yang sederhana dari beberapa guru tentang kegiatan pembelajaran yang dilakukan dan perolehan pelatihan dalam kurun waktu mengajar masih tergolong minim. Selain itu, kurikulum 2013 merekomendasikan beberapa model pembelajaran salah satunya adalah project based learning. Kenyataan dari beberapa guru yang diwawancarai ternyata penerapannya masih jarang. Project based learning penting diterapkan karena dapat memfasilitasi peserta didik untuk belajar melalui prosenya. Metode penelitian ini menggunakan pendekatan kualitatif deskreftif. Subjek penelitian adalah  guru-guru dari berbagai sekolah yang berbeda. Hasil menunjukkan bahwa guru masih jarang memperoleh pelatihan dan penerapan model pembelajaran project based learning masih jarang dilakukan. Kesimpulannya perlu adanya pelatihan yang menyeluruh yang tidak terbatas oleh kalangan dan contoh nyata penerapan model  project based learning.
ANALYZING STUDENTS' MENTAL MODEL ABOUT ACID BASE THROUGH INTERVIEW ABOUT EVENT (IAE) Mulyani, Sri; Nurazizah, Tean; Sumarna, Omay; Wiji, Wiji; Widhiyanti, Tuszie
Jurnal Pengajaran MIPA Vol 23, No 2 (2018): JPMIPA: Volume 23, Issue 2, 2018
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18269/jpmipa.v23i2.16938

Abstract

Mental model plays an important role in giving reasons, describing, explaining, predicting, testing new ideas, and solving problems. Research on the mental model still needs to be done, especially regarding acid-base which is revealed by using Interview About Event (IAE). The purpose of this study was to analyze the students' mental models on the Arrhenius acid-base concept, the concept of Brӧnsted-Lowry acid base, and acid-base strength. The study was conducted on six students of class XII IPA in one high school in Bandung by using interviews that ask students to explain the given phenomenon. The answers of each student are mapped so as to derive their mental model profile. Based on the pattern obtained, there is found misconception experienced by students that all substances having atom H or OH group on chemical formula is Arrhenius acid or base, proton transfer on acid-base reaction Brӧnsted-Lowry occurs from acid to its conjugate base or from base to conjugate acid , The arrow of the reaction both in the perfect ionisation reaction and the partial ionization reaction is the same ie the arrow one (), the solute particles present in the solution in the ionizing agent are only partially ions (in the absence of molecules). Findings are useful for developing learning strategies, textbooks, media and other learning tools by linking the different levels of chemical representation to build meaning so that students' understanding is better. Keywords: acid basa, Interview About Event (IAE), misconception, mental model.AbstrakModel mental berperan penting dalam memberikan alasan, menggambarkan, menjelaskan, memprediksi, menguji ide-ide baru, dan memecahkan masalah. Penelitian mengenai model mental masih perlu dilakukan, khususnya mengenai asam-basa yang diungkap dengan menggunakan Interview About Event (IAE). Tujuan dari penelitian ini adalah untuk menganalisis model mental siswa pada konsep asam basa Arrhenius, konsep asam basa Brӧnsted-Lowry, dan kekuatan asam basa. Penelitian dilakukan terhadap enam siswa kelas XII IPA di salah satu SMA di Kota Bandung  dengan  menggunakan wawancara yang meminta siswa untuk menjelaskan fenomena yang diberikan.  Jawaban setiap siswa dipetakan sehingga diperoleh profil model mental mereka. Berdasarkan pola yang diperoleh, ditemukan miskonsepsi yang dialami siswa yaitu semua zat yang memiliki atom H atau gugus OH pada rumus kimianya merupakan asam atau basa Arrhenius, transfer proton pada reaksi asam basa Brӧnsted-Lowry terjadi dari asam ke basa konjugatnya atau dari basa ke asam konjugatnya, tanda panah reaksi baik pada reaksi ionisasi sempurna maupun reaksi ionisasi sebagian adalah sama yaitu tanda panah satu (), partikel zat terlarut yang ada dalam larutan pada zat yang mengalami reaksi ionisasi sebagian hanya ion-ionnya saja (tanpa adanya molekul). Temuan bermanfaat untuk mengembangkan strategi pembelajaran, buku ajar, media dan perangkat pembelajaran lainnya dengan mempertautkan antar level representasi kimia untuk membangun makna sehingga pemahaman siswa menjadi lebih baik.
Analisis Kebutuhan Guru Kimia terhadap Program Pelatihan Peningkatan Keterampilan Inkuiri dan Scaffolding Berbasis Blended Learning Sukisman Purtadi; Anna Permanasari; Omay Sumarna; Wahyu Sopandi
Jurnal Pendidikan Matematika dan Sains Vol 2, No 1 (2014): June 2014
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.181 KB) | DOI: 10.21831/jpms.v3i1.3895

Abstract

Telah dilakukan analisis kebutuhan (need assessment) untuk melihat kebutuhan para guru kimia di SMA pada pelatihan untuk meningkatkan keterampilan inkuiri dan scaffolding. Analisis kebutuhan ini dilakukan untuk menjaring informasi mengenai kondisi guru dan harapan guru berkaitan dengan program pelatihan, penggunaan internet, metode pembelajaran inkuiri, dan program pelatihan yang akan dikembangkan. Analisis kebutuhan ini dilakukan dengan menggunakan angket yang disebarkan secara random pada guru SMA. Angket terdiri dari 52 butir pertanyaan terbuka dan semi-terbuka. Analisis dilakukan terhadap 24 angket yang terkumpul. Hasil analisis menunjukkan bahwa pengetahuan dan keterampilan guru mengenai inkuiri masih perlu ditingkatkan dengan proses pelatihan berbasis blended learning yang menekankan materi yang langsung dapat digunakan guru kimia di dalam kelas mereka. Hasil dari analisis ini dijadikan sebagai salah satu dasar dalam menyusun program pelatihan berbasis blended learning.Kata kunci: analisis kebutuhan, pelatihan, inkuiri, scaffolding, blended learning
PENGEMBANGAN BAHAN AJAR KIMIA DASAR BERBASIS CONCEPTUAL CHANGE TEXT PADA MATERI REDOKS Wati Sukmawati; Asep Kadarohman; Omay Sumarna; Wahyu Sopandi
EDUSAINS Vol 12, No 2 (2020): EDUSAINS
Publisher : Faculty of Education and Teacher Training, UIN (State Islamic University) Syarif Hidayatul

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/es.v12i2.15090

Abstract

DEVELOPMENT OF TEACHING MATERIALS BASED ON CONCEPTUAL CHANGE TEXT ON REDOX MATERIALS FOR BASIC CHEMICALS ON REDOX CONCEPTAbstractThe problem in this study is that there are still many students who have difficulty learning basic chemical concepts and experience misconceptions. One way to overcome student difficulties in understanding the concept of chemistry is to provide quality learning media. This study aims to produce learning media in the form of quality teaching materials. The teaching materials developed are chemical teaching materials based on Conceptual Change Text (CCT). The research data were obtained from the results of validation of teaching materials from experts and the results of a questionnaire distributed to 30 students. This research was conducted using the R&D method with the research subjects being teaching materials and students. Based on the data generated in this study, it was found that the development of CCT-based teaching materials when viewed from the aspects of content feasibility, presentation feasibility, language assessment, multiple chemical representations assessed by some experts, it can be concluded that the teaching materials developed are good and suitable for use in the field with some improvements with an average validation value of 4. Besides, a limited test was also carried out on students of the teaching materials that were being developed and students responded well to the teaching materials because it could help them understand the average value of 85. AbstrakPermasalahan dalam penelitian ini adalah masih banyaknya mahasiswa yang mengalami kesulitan dalam belajar konsep kimia dasar dan mengalami miskonsepsi. Salah satu cara untuk mengatasi kesulitan mahasiswa dalam memahami konsep kimia adalah menyediakan media pembelajaran yang berkualitas. Penelitian ini bertujuan untuk menghasilkan media pembelajaran berupa bahan ajar yang berkualitas. Bahan ajar dikembangkan adalah bahan ajar kimia berbasis Conceptual Change Text (CCT). Data penelitian diperoleh dari hasil validasi bahan ajar dari para ahli dan hasil angket yang disebarkan kepada 30 orang mahasiswa.  Penelitian ini dilakukan dengan metode R&D dengan subjek penelitian adalah bahan ajar dan mahasiswa. Berdasarkan data yang dihasilkan dalam penelitian ini diperoleh hasil bahwa pengembangan bahan ajar berbasis CCT jika dilihat dari aspek kelayakan isi, kelayakan penyajian, penilaian bahasa, penilaian multiple representasi kimia yang dinilai oleh beberapa ahli dapat disimpulkan bahwa bahan ajar yang dikembangkan sudah baik dan layak digunakan di lapangan dengan beberapa perbaikan dengan rata-rata nilai validasi 4. Selain itu juga dilakukan uji terbatas terhadap mahasiswa terhadap bahan ajar yang sedang dikembangkan dan mahasiswa merespon dengan baik bahan ajar tersebut karena bisa membantu mereka dalam memahami dengan rata-rata nilai 85. konsep. 
ACTIVITIES OF MGMP IPA ACTIVITIES TO INCREASE THE TEACHER COMPETENCE IN BOGOR DISTRICT Wiworo Retnadi Rias Hayu; Anna Permanasari; Omay Sumarna; Sumar Hendayana
Indonesian Journal of Social Research (IJSR) Vol 1 No 1 (2019): Indonesian Journal of Social Research (IJSR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijsr.v1i1.6

Abstract

MGMP is a community of teachers to always learn (long life learning). Rapid development of the times requires the teacher to participate in the pursuit of knowledge. Lifelong learning is the teacher's obligation to generate knowledge. This is necessary because the teacher is a facilitator of students to gain knowledge. In line with that, teachers are expected to master every change process so students can also face global challenges. These results indicate that the majority of teachers who come to MGMP IPA Bogor District civil servants Teachers. MGMP activities are a place that facilitates teachers' mutual learning together. MGMP members consist of various teachers from different schools. The results show the MGMP majority forum of senior teachers. Senior Teachers are expected to guide junior and mediator teachers to learn from one another. The results of the study concluded that continuing professional development needs to be developed, then content, then creativity, ICT and finally SK and KD to improve teacher competence. The activity steps are arranged to help activate and optimize activities, namely by self-development, scientific publications, and scientific work in the Bogor District MGMP.
The INSTRUCTION OF SCIENCE IN RURAL JUNIOR HIGH SCHOOL Wiworo Retnadi Rias Hayu; Anna Permanasari; Omay Sumarna; Sumar Hendayana
Indonesian Journal of Social Research (IJSR) Vol 3 No 2 (2021): Indonesian Journal of Social Research (IJSR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijsr.v3i2.137

Abstract

The teacher is an essential component of learning. Learning that is often focused by the government is learning in urban schools. Even though rural schools also have the same right to consider. Longer distances and access to schools that are more difficult to reach causes a lack of attention in rural areas schools. Learning in rural areas also requires attention to improve the quality of teaching. Knowing learning activities in rural schools is very important because it will understand what learning needs to be improved. The purpose of the research is to find out how teaching science in rural schools. This research uses mixed methods with the Taxonomy Development Model research design. The phase of QUAL is carried out to identify important variables. The development of a taxonomy or classification system, the development of theories that are not yet stable, and supporting it is a test in the phase of QUAN to obtain more thorough study results. The findings of this study illustrate that learning begins with answering questions, so students are enthusiastic. The next learning activity showing films about the reproduction of students was very excited about learning. The obstacle found in learning is the lack of preparation in the learning that is done so that time is wasted to condition the video playback.
Co-Authors A. Mudzakir Aisyah Tiara Kusumaningtyas Albaiti Albaiti, Albaiti Anna Permanasari Asep Kadarohman Ayu Ashari Hafiz Aji Aziz Hayat Sholihin Heli S.H Munawaroh HERNANI - Iqlima Rahayu Liliasari , Mr Sjaeful Anwar Mr Sumar Hendayana Nurazizah, Tean Popi Cahyani Rahayu, Wiworo Retnadi Rias Rahmat Setiadi Ruci Aditya Rushiana Sarah Ayu Wulandari Sri Mulyani Sukisman Purtadi Tuszie Widhiyanti Tuszie Widhiyanti Wahyu Sopandi Wati Sukmawati Wiji Wiji Wiworo Retnadi Rias Hayu Wiworo Retnadi Rias Hayu, Wiworo Retnadi Rias