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All Journal Jurnal Pendidikan IPA Indonesia MILANG Journal of Mathematics and Its Applications
RAHMAWATI, T.
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Education Mathematics

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Electronic Portfolio Assessment Instruments in Improving Students' Creative Thinking Skills Rahmawati, T.; Mulyaningsih, T.; Nahadi, N.; Suhanda, H.; Lee, W. K.; Aziz, H. A.; Anwar, S.
Jurnal Pendidikan IPA Indonesia Vol 12, No 4 (2023): December 2023
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.v12i4.45639

Abstract

The objective of the study is to determine the stage of the process of developing electronic portfolio assessment instruments and obtain a valid and reliable electronic portfolio assessment instrument that can be used as an alternative effective assessment in improving students’ creative thinking on redox reaction materials. The research method employed was Research and Development (RD) with a 4-D development model: define, design, develop, and disseminate. The data sources for this study were obtained from chemistry education lecturers, chemistry teachers, and eleventh-grade students in one of the high schools in Bandung. The instruments used in this study were interview guidelines, instrument content validation sheet, task assessment observation sheet, creative thinking skills assessment task and rubric, portfolio assessment rubric, pre-test and post-test questions and rubrics on chemical reaction equations that have tested for validity. The developed electronic portfolio assessment instrument was realized in a task and assessment rubric based on 21st-century creative thinking indicators. The results reveal that the developed electronic portfolio assessment instrument has good quality because it fulfils the valid requirements with a CVR value of 1.00 and fulfils the reliable requirements with a Cronbach Alpha value of 0.702-0.982. Electronic portfolios can be used as one of the assessment tools for science learning. The developed electronic portfolio assessment instrument may promote students’ creative thinking on redox reaction material based on the N-Gain 0.72 with the high category and has good effectiveness based on the N-Gain 0.61 with the medium category. Based on the category of mastery learning, the effectiveness is 9.66%.
Analisis Kestabilan Titik Tetap dan Bifurkasi Kelompok Inti pada Model Transmisi Penyakit Seksual RAHMAWATI, T.; AIDI, M. N.; HANUM, F.
MILANG Journal of Mathematics and Its Applications Vol. 1 No. 1 (2002): Journal of Mathematics and Its Applications
Publisher : School of Data Science, Mathematics and Informatics, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jmap.1.1.49-64

Abstract

Transmisi penyakit seksual pada suatu populasi berkaitan erat dengan kegiatan seksuaJ individu-individu pada populasi tersebut. Dalarn pemba- hasan model transrnisi penyakit seksual ini, populasi dibagi rnenjadi dua kelorn- pok, yaitu kelompok dengan tingkat aktivitas seksual tinggi yang dinamakan kelorrrpok inti, dan kelornpok dengan tingkat aktivitas seksual rendah, yang dinamakan dengan kelompok non-inti. Berdasarkan tingkat aktivitasseksual- nya, pada umumnya kelompok non inti tidak terlalu berpengar uh pada trans- misi penyakit seksual ini. Jadi, model umum transmisi penyakit seksual amat dipengaruhi oleh model kelompok inti yang dibahas dalam tulisan ini. Ana- lisis kestabilan dilakukan untuk model tersebut dan diperoleh tiga titik tetap beserta kondisi kestabilan yang harus dipenuhi. Individu terinfeksi dapat menularkan penyakit pada individu rentan atau tervaksinasi, dan dapat berpengaruh pada kestabilan transmisi penyakit sek- sual pada kelompok inti ini. Strategi pencegahan (vaksinasi) juga diberikan pada kelompok inti. Perubahan nilai tingkat vaksinasi dapat mempengaruhi kestabilan sistem. Sistem akan kehilangan kestabilan apabila diberikan tingkat vaksinasi yang lebih kecil daripada tingkat kritis vaksinasi.
Co-Authors AIDI, M. N. Aziz, H. A. HANUM, F. Lee, W. K. Mulyaningsih, T. Nahadi, N. S. Anwar Suhanda, H.