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All Journal METANA KALAM CENDEKIA PGSD KEBUMEN Jurnal Karya Pendidikan Matematika Naturalistic : Jurnal Kajian dan Penelitian Pendidikan dan Pembelajaran Scholaria: Jurnal Pendidikan dan Kebudayaan Justek : Jurnal Sains Dan Teknologi Pendekar : Jurnal Pendidikan Berkarakter Wahana Kreatifitas Pendidik (WKP) JURNAL PENDIDIKAN TAMBUSAI Jurnal Cendekia : Jurnal Pendidikan Matematika Jurnal Basicedu Jurnal Ilmiah Pendidikan dan Pembelajaran Journal of Education Action Research Mimbar Ilmu Jambura Journal of Educational Management FONDATIA Infotekmesin Thinking Skills and Creativity Journal Jurnal Pendidikan dan Konseling JPDI (Jurnal Pendidikan Dasar Indonesia) Jurnal Prakarsa Paedagogia JIIP (Jurnal Ilmiah Ilmu Pendidikan) Jurnal Ilmiah Wahana Pendidikan Cendikia : Media Jurnal Ilmiah Pendidikan Indonesian Journal Of Educational Research and Review Jurnal Riset Teknologi dan Inovasi Pedidikan (JARTIKA)
Theresia Sri Rahayu
Universitas Kristen Satya Wacana
Religion Humanities Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Social Sciences Other

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Penerapan Pendekatan Scientific dengan Menggunakan Media Konkret untuk Meningkatkan Hasil Belajar Matematika Siswa Kelas 4 SD Irwanto Irwanto; Wasitohadi Wasitohadi; Theresia Sri Rahayu
Jurnal Riset Teknologi dan Inovasi Pendidikan (Jartika) Vol. 2 No. 1 (2019): Januari Special Issues
Publisher : Jurnal Riset Teknologi dan Inovasi Pendidikan (Jartika)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.021 KB)

Abstract

The purpose of this study is to improve student learning outcomes in thematic learning by applying the scientific approach. The number of students studied was 14 students. The results showed that the application of the scientific approach to student learning completeness cycle was only 14% or 4 students who received mastery, increased to 79% or 11 students who completed the first cycle and in the second cycle the learning completeness was reached 100% or all students got mastery value. That is, the learning process using the scientific approach works well. So it can be concluded that the implementation of the steps of learning using the scientific approach can improve the learning outcomes of 4th grade students in Elementary School.
Meningkatkan Antusiasme dan Hasil Belajar Siswa dengan Model Picture and Picture Berbantuan Media Puzzle pada Muatan Matematika, Bahasa Indonesia, dan PPKn Kelas 1 SD Bekti Ariyani; Wasitohadi Wasitohadi; Theresia Sri Rahayu
Jurnal Riset Teknologi dan Inovasi Pendidikan (Jartika) Vol. 2 No. 1 (2019): Januari Special Issues
Publisher : Jurnal Riset Teknologi dan Inovasi Pendidikan (Jartika)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (198.762 KB)

Abstract

The research conducted aims to determine of the picture and picture model applied to students who are hyperactive to increase enthusiasm and increase learning outcomes. The instruments used in this study are teacher activity sheets, student test results and learning activity documents. Thematic learning outcomes of students in the pre-cycle were only 3 (three) students (11%) who were completed from 27 (twenty seven) students, in first cycle only 10 (ten) students (37%) were completed from 27 (twenty seven) students, while in second cycle reached 100% who got complete score of 27 (twenty seven) students. This means that the learning process with the Picture and Picture model runs well. By studying the results of the study, the authors can conclude that the implementation of the learning steps using the Picture and Picture model can increase the learning outcomes in Salatiga 10 Elementary School.
Sintesis Nanopartikel ZnO-Ag Sebagai Fotokatalis dengan Variasi Suhu Kalsinasi Supriyadi, Aris; Fadlilah, Ilma; Sri Rahayu, Theresia Evila Purwanti
METANA Vol 21, No 1 (2025): Juni 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v21i1.71050

Abstract

Nanopartikel adalah partikel yang memiliki ukuran 1-100 nanometer. Seng oksida dikenal sebagai bahan yang ramah lingkungan dikarenakan kompatibel dengan organisme hidup. Salah satu, cara untuk membuat partikel berukuran nano adalah dengan menggunakan metode sol-gel. Pada penelitian ini, bertujuan untuk mensintesis nanopartikel ZnO-Ag menggunakan metode sol-gel dan mengkaji pengaruh variasi suhu kalsinasi serta mengetahui karakteristik yang dihasilkan. Variabel yang digunakan yaitu variasi suhu kalsinasi yakni 400°C, 500°C dan 600°C. Nano ZnO-Ag yang dihasilkan dianalisis karakteristik morfologinya dan kandungan unsur menggunakan Scanning Electron Microscopy Sinar-x (SEM EDX). Hasil sintesis ZnO-Ag menunjukkan bahwa terjadi perubahan fisik yang dilihat dari segi warna yang tidak terlalu spesifik terhadap ZnO-Ag akibat dari variasi suhu kalsinasi. Hasil uji SEM-EDX menunjukkan bahwa ZnO-Ag menghasilkan morofologi permukaan yang strukturnya tidak merata dan memiliki pori terbuka. Dilihat dari segi ukuran partikel, diketahui bahwa ZnO-Ag dengan suhu kalsinasi 400°C memiliki ukuran partikel paling kecil yaitu 92,17±nm dengan komposisi massa unsur penyusun sebesar Zn 81,6%; O 18,1% dan Ag 0,27%.   Nanoparticles are particles that have a size of 1-100 nanometers. Zinc oxide is known as an environmentally friendly material because it is compatible with living organisms. One way to make nano-sized particles is by using the sol-gel method. In this study, the aim was to synthesize ZnO-Ag nanoparticles using the sol-gel method and to study the effect of variations in calcination temperature and to determine the characteristics produced. The variables used were variations in calcination temperature, namely 400°C, 500°C and 600°C. The resulting ZnO-Ag nanoparticles were analyzed for their morphological characteristics and elemental content using Scanning Electron Microscopy X-rays (SEM EDX). The results of the ZnO-Ag synthesis showed that there were physical changes seen in terms of color that were not very specific to ZnO-Ag due to variations in calcination temperature. The results of the SEM-EDX test showed that ZnO-Ag produced a surface morphology that had an uneven structure and had open pores. In terms of particle size, it is known that ZnO-Ag with a calcination temperature of 400°C has the smallest particle size, namely 92.17±nm with a mass composition of constituent elements of Zn 81.6%; O 18.1% and Ag 0.27%.
Pengaruh Waktu Karbonisasi Terhadap Kadar Air dan Abu Serta Kemampuan Adsorpsi Arang Tempurung Nipah Teraktivasi Asam Klorida Purwanti Sri Rahayu, Theresia Evila; Dwityaningsih, Rosita; Ulikaryani
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1027

Abstract

The Cilacap region, Central Java, Indonesia is a coastal area that is overgrown with nipa palm trees, making it one of the potential local natural resources to be exploited. Utilization of this plant has been carried out for the fields of food, energy, clothing, pharmaceuticals, and furniture, but as an anode material for lithium-ion batteries is still being researched. Studies on lithium-ion batteries in Indonesia in particular have not started long ago so that research in this field is still limited and few in number, but the development of lithium-ion batteries has become one of the national research priorities in the field of new and renewable energy sources as stated in the Indonesian national research master plan (RIRN) for the period 2017 – 2045. This study was conducted to examine the potential feasibility of activated charcoal from nipah shells as anode material for lithium-ion batteries. The feasibility test parameters studied in this study include water content, ash content and adsorption capacity stated as iodine and methylene blue number which are the basic characterizations for activated charcoal referring to SNI 06-3730-1995. The nipah shell carbonization process was carried out in the presence of oxygen at an optimized temperature of 210 oC with a 1 hour time interval variation from 3 to 8 hours, followed by an activation process using a strong acid, namely HCl with a concentration of 2 M. The experimental results showed the average value of moisture content, ash content, iodine, and methylene blue number are 12.5%, respectively; 1.75%; 2515.9161 mg/g; and 97%, all of which are above the quality standard values, so the conclusion from this study is that activated charcoal from nipah shell has basic characteristics that have the potential to be further developed, including as raw material for lithium-ion battery anodes.
Co-Authors Albertus Hermawan Andika Arma Saputra Andista Mutia Candra Aris Supriyadi Ariska Meita Sari Ayudya, Mutiara Sasy Balad Ikklima Bekti Ariyani Dewi Aprilliani Dimas Anjar Kisworo Dwityaningsih, Rosita Elta Dhiaz Ristanti Ely Permono Emilia Emilia Erlin Damayanti Fachrul Imami Fadlilah, Ilma Feny Carollina Ferna Setiana Fika Wulandari Firosalia Kristin Gemi Sumarliningsih Ika Puspita Putri Indri Anugraheni Irmawati Irmawati Irwanto Irwanto Kristianto, Dwi Liga Wulan Baktini Maryani Maryani Maulida Anggraina Saputri Mawardi Melania Arneta Rosanti Muhammad Ardiansyah Pangestu Bagas Surya putra Pangestu Bagas Surya putra Purnomo , Riky Nur Cahyo Roy Hermawan Saputro, Okta Aji Shofi Wedhi Prayuda Sri Sugiarti R, Eva Tri Ardiyanti Ulfa, Fathika Maria Ulikaryani Utami, Nadiya Puji Wasitohadi - Widyastuti, Paramita Indah Yayi Suryo Prabandari Yolanda Efrita Lois Yuliyanti, Ana Yunita Hastuti, Vanityas