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All Journal Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Jurnal Fisika Unand
Veronica, Yessi
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Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Other

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使用笔顺教学提高初中圣父学校二年级学生的汉字书写能力 Veronica, Yessi
Jurnal Pendidikan dan Pembelajaran Khatulistiwa Vol 6, No 8 (2017): Agustus 2017
Publisher : Jurnal Pendidikan dan Pembelajaran Khatulistiwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1001.383 KB)

Abstract

 AbstractChinese characters are composed of strokes. There are some fixed orders in strokes when writing Chinese characters. The order of writing Chinese characters is called stroke orders. Writing Chinese characters cannot be arbitrary, and to comply with certain rules of stroke, so as to write correctly and beautifully. To write Chinese characters, it is a must to master strokes, stroke orders, and Chinese characters structure. Students of Junior High School found it difficult in writing Chinese characters so they wrote it carelessly. In order to improve the students ability in writting Chinese characters, the writer implied the "Stroke Order Teaching Method"  for 8th grade Students on class C and D in Bruder Junior High School Pontianak by conducting experimental research. After doing the research, the writer concluded that the students’ has mastery of Chinese characters strokes, strokes orders and Chinese structure has reached more than 70%, in percentage while the ability in writing Chinese characters is in 66.63%. The writer hopes this thesis can be useful as the references for the Chinese subject teachers to conducts classroom teaching activities. Keywords: Teaching of Chinese Characters, Writing Chinese Characters, Writing  Strokes
Sintesis dan Karakterisasi Nanokomposit Fe3O4@PEG:ZnO Veronica, Yessi; Astuti, Astuti; Alfitri Usna, Sri Rahayu
Jurnal Fisika Unand Vol 11 No 1 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.11.1.29-36.2022

Abstract

Telah dilakukan penelitian tentang sintesis dan karakterisasi sifat optik pada nanokomposit Fe3O4@PEG:ZnO. Sampel yang digunakan adalah Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@ZnO (1:2), Fe3O4@PEG:ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3). Metode yang digunakan untuk sintesis nanokomposit adalah metode presipitasi. Nanokomposit dikarakterisasi dengan menggunakan X-Ray Diffraction (XRD), Fourier Transform Infra (FTIR), UV-Vis Spectrometry, dan Particle Size Analyzer (PSA). Hasil karakterisasi XRD pada sampel dengan variasi Fe3O4, Fe3O4@ZnO 1:1, Fe3O4@ZnO 1:2, dan Fe3O4@PEG:ZnO 1:3 menunjukkan struktur besi oksida berturut-turut adalah cubic, monoclinic, rhombohedral, dan cubic. Sedangkan struktur ZnO untuk sampel dengan variasi Fe3O4@ZnO 1:1, Fe3O4@ZnO 1:2, dan Fe3O4@PEG:ZnO 1:3  adalah hexagonal.  Ukuran kristal yang diperoleh pada Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3)  berturut-turut sebesar 14,54 nm; 14,59 nm; 2,91 nm; dan 2,91 nm. Hasil karakterisasi sifat optik menunjukkan bahwa energi gap Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@PEG:ZnO (1:2), dan Fe3O4@PEG:ZnO (1:3)  berturut-turut sebesar 2,06 eV; 2,56 eV; 3,17 eV; dan 2,25 eV. Pada pengujian FTIR terdapat ikatan O-H yang menunjukkan adanya serapan molekul air pada permukaan Fe3O4, ikatan C-O dan C-C menunjukkan terbentuknya PEG, dan ikatan Zn-O menunjukkan terbentuknya ZnO. Distribusi ukuran partikel Fe3O4@PEG:ZnO (1:2) yaitu pada rentang 0,246 μm (246 nm) hingga 0,030 μm (30 nm), dengan distribusi ukuran partikel terbanyak 0,030 μm (30 nm).
Co-Authors Astuti - Usna, Sri Rahayu Alfitri