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All Journal JURNAL PENDIDIKAN TAMBUSAI Indonesian Physical Review
Rahayu, Vira
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Education Physics Social Sciences

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Memaksimalkan Kemampuan Berpikir Kritis melalui Mengidentifikasi Satuan Panjang dengan Bola Soal SDN Telaga Biru 8 Rahayu, Vira; Darmiyati, Darmiyati
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Permasalahan yang mendasari penelitian ini ialah kemampuan dalam berpikir kritis aktivitas siswa serta hasil belajar khususnya mata pelajaran matematika materi satuan panjang. Sebab itu, itu perlunya ada model pembelajaran untuk bisa meningkatkan keterampilan berpikir kritis, aktivitas belajar serta hasil belajar. Model pembelajaran yang digunakan adalah model pembelajaran problem based learning yang dikombinasikan dengan example non example dan snowball throwing. Metode yang dipakai pada penelitian ini ialah kuantitatif dan kualitatif yang menggunakan jenis penelitian tindakan kelas (PTK). Subjek penelitian ini ialah siswa kelas II SDN Telaga Biru 8, dengan total siswa 26 orang. Hasil penelitian ini menunjukkan bahwa aktivitas pendidik pada siklus I mencapai skor 40 pada siklus II meningkat menjadi 42, kemudian pada aktivitas peserta didik mengalami peningkatan, yang mana pada siklus I hanya mencapai 69% pada siklus II meningkat menjadi 100%, kemampuan berpikir kritis pada pertemuan hanya mencapai 42% pada pertemuan 3 meningkat menjadi 88%. Ketuntasan klasikal hasil belajar pada siklus 1 hanya mencapai 42% dan meningkat pada siklus II menjadi 81%.
SINTESIS KOMPOSIT NANO PANI/Fe3O4 KONDUKTIF BERBASIS PASIR ALAM Hamid, Abd Basith; Sholichah, Nikmatin; Rahayu, Vira; Ardimas, Ardimas; Fadhli, Ulfa Mahfudli
Indonesian Physical Review Vol. 4 No. 2 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i2.94

Abstract

Polyaniline is a polymer material that has unique physical and even chemical properties, especially in its electrical properties. PANi synthesis can be carried out by chemical and electrochemical oxide reaction methods. The purposes of this study are to synthesize PANi and PANi / Fe3O4 composites by chemical oxide reactions and measure their conductivity. This research begins with the synthesis of iron oxide (Fe3O4) from natural iron sand and then followed by the synthesis of PANi / Fe3O4 composites using copreticipitation method. The Fe3O4 crystal phase was determined by using XRD, while the vibrational mode and morphology of the PANi / Fe3O4 nanocomposite was observed using FTIR and SEM. The conductivity properties were measured using a LCR meter. Furthermore, the conductivity properties were measured using a LCR meter and the result reveals a greater conductivity value as increasing the concentration of Fe3O4, the highest conductivity value of 3.1 mS/cm is known by the sample with an iron oxide concentration of 1 %. While the samples with a concentration of 0.5 % of iron oxide has conductivity values  of 2.8 mS/cm and pure PANi of 2.1 mS/cm. Due to its properties such  to inert to the environment and having conductive properties, the obtained PANI / Fe3O4 composite can be employed as a super capacitor electrode.
Co-Authors Ardimas, Ardimas Darmiyati Fadhli, Ulfa Mahfudli Hamid, Abd Basith Sholichah, Nikmatin