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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Litbang Industri Indonesian Journal of Science and Technology
Willy Cahya Nugraha, Willy Cahya
Lab. Nano Proses Dan Membran Lembaga Ilmu Pengetahuan Indonesia
Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Environmental Science Industrial & Manufacturing Engineering

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Journal : Indonesian Journal of Science and Technology

 1 
Traceable Value for Proficiency Test of Natural Gas Ridwan, Yohanes Susanto; Supriadi, Supriadi; Nugraha, Willy Cahya
Indonesian Journal of Science and Technology Vol 4, No 2 (2019): IJOST: VOLUME 4, ISSUE 2, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i2.18184

Abstract

The use of consensus values as the assign value for proficiency testing (PT) activities are currently a common practice in Indonesia, including the field of natural gas analysis. Hence, mostly the performance evaluation is based on consensus agreement. In this work, a PT was conducted using traceable values with respect  to ISO/IEC 17043 and ISO 13528. It was demonstrated that the chosen PT scheme has good capability to evaluate the performance of participating laboratories. And, in some cases, the selected PT scheme was not affected by extreme values and limited number of participants. Post analysis to the PT round has been conducted using the information of uncertainty of the traceable value and the uncertainty of robust average of participants’ results. It was demonstrated that there were no significance biases in the PT round. Moreover, it could be concluded that the participating laboratories have a good agreement with one to another. They also have a good agreement with traceable values, giving more additional confidence to the measurement quality in this field of analysis.
Zinc Oxide Nanoparticles for Enhancing Students’ View of the Nature of Science and Technology Priyand, Elza Rachman Panca; Sukmafitri, Ajeng; Mudzakir, Ahmad; Nandiyanto, Asep Bayu Dani; Nugraha, Willy Cahya; Ramdhani, Wahyu
Indonesian Journal of Science and Technology Vol 5, No 1 (2020): IJOST: VOLUME 5, ISSUE 1, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i1.22806

Abstract

This study aims to evaluate zinc oxide (ZnO) nanoparticles as a learning media to enhance students' understanding of View of Nature of Science and Technology (VNOST). The method used in this study: (i) understanding how to synthesize ZnO nanoparticles using a liquid-phase synthesis; (ii) implementation of ZnO nanoparticles to students and analysis their comprehension using Transcript Based Lesson Analysis (TBLA) on the Learning Video Recording and Adaptation Learning Transcript VNOST questionnaire, which is linked to the implementation and pattern of knowledge construction; and (iii) descriptive qualitative analysis to analyze the understanding of VNOST for each Category (Naïve, Has Merit and Realist). To support this study, several analyses were done, such as a scanning electron microscope and X-ray diffraction to characterize ZnO nanoparticles’ morphology and crystal structure, respectively, prior to giving this material for further learning to students. Experimental results showed that the use of ZnO nanoparticles is effective to improve the student comprehension. The understanding in the principle of nucleation and growth can be explained well since the reaction of ZnO is relatively fast. Students became more serious in listening during the learning process and more curious to study science and technology. Based on a comparative analysis of the initial and final ability of VNOST, it is proved that there was a change in students' views related to science and technology.
Co-Authors Ahmad Aminudin Asep Bayu Dani Nandiyanto Dini Hariyati Adam Eka Wardhani Hamzar Suyani Irmansyah, Athaya Zahrani Muhamad Nasir, Muhamad Priyand, Elza Rachman Panca Ramdhani, Wahyu Ridwan, Yohanes Susanto Rohman, Oman Safni Safni Salsabila, Unik Hanifah Sukmafitri, Ajeng Velda, Nazla Amaliyah Wulan, Diana Rahayuning