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Tarhadi Tarhadi
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Earth & Planetary Sciences Education

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DAMPAK PELAKSANAAN MODEL MATEMATIKA REALISTIS PADA PENINGKATAN KEMAMPUAN PENALARAN DEDUKTIF SISWA SEKOLAH MENENGAH DI PARUNG KABUPATEN - KABUPATEN BOGOR M.Si., Dr. Yumiati; Tarhadi, Tarhadi
Jurnal Pendidikan Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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This study attemps to determine impact of the implementation of Realistic Mathematics Education (RME) model on the improvement of deductive reasoning ability, and to describe the perceptions of teachers and students of secondary schools toward the RME model. A quasi-experiment with pretest-postest non-equivalent group as research design was employed into 2 groups of research subject: the experimental group and the control group and each was treated under RME and conventional teaching model. A number of 44 students of SMPN1 Parung and 20 students of SMP Islam Terpadu Jabon Mekar in Parung District were chosen as research subjects. Quantitative data obtained through questionnaires and written tests were analyzed using Student-t test. While qualitative information gathered through responses to personal interview and observations was analyzed using qualitative-naturalistics method. Findings reveals that learning mathematics using the RME model impacts on increasing students deductive learning ability in both schools with amount of increase is 30.7 for SMP Islam Terpadu and 44.8 for SMPN1 Parung. RME model also impacts on developing students positive attitude of students toward mathematics as seen in the number of students who liked mathematics lesson, that is 100% for SMP Islam Terpadu and 97% SMPN 1 Parung. The perceptions of teachers and students in both schools toward the RME Model are positive. Application of learning mathematics using PMR model becomes more enjoyable and students become more active.
STUDI POLA DAN KARATERISTIK ARUS LAUT DI PERAIRAN KALIWUNGU KENDAL JAWA TENGAH PADA MUSIM PERALIHAN I Tarhadi, Tarhadi; Indrayanti, Elis; DS, Agus Anugroho
Journal of Oceanography Vol 3, No 1 (2014)
Publisher : Program Studi Oseanografi, Jurusan Ilmu Kelautan, Universitas Diponegoro

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Abstrak Pembangunan Pelabuhan di dearah Kaliwungu Kendal menyebabkan kondisi perairan di sekitar lokasi pelabuhan menjadi dinamis. Proses hidro-oseanografi memberikan pengaruh terhadap kondisi di perairan Kaliwungu dalam hal ini khususnya arus laut. Tujuan dilakukannya penelitian ini adalah untuk mengetahui pola dan karateristik arus laut di perairan Kaliwungu Kendal. Materi yang digunakan meliputi data primer berupa arus dan data sekunder yaitu data angin dan peta bathimetri perairan Kaliwungu Kendal. Metode yang digunakan dalam penelitian adalah deskriptif dengan penentuan lokasi pengambilan data arus dengan purposive sampling methods. Perekaman data arus dengan ADCP dan pengolahan data dengan ADCIRC. Hasil penelitian menunjukan bahwa rata-rata kecepatan arus perlapisan sebagai berikut : lapisan permukaan (0 m s/d 2 m) adalah 0,088 m/dt, lapisan tengah (3 m s/d 8 m) adalah 0,070 m/dt dan lapisan dasar (8 m s/d 10 m) adalah 0,057 m/dt. Kecepatan rata-rata arus Perairan Kaliwungu Kendal pada musim peralihan I adalah 0,089 m/dt dan arah dominasi ke arah tenggara. Karateristik arus Perairan Kaliwungu Kendal di dominasi arus pasut sebesar 84% dan arus non pasut 16% dengan pola gerakan arus laut mengikuti pola gerakan pasang surut.
Co-Authors Elis Indrayanti Nugroho Agus D Purwoko, Agus