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All Journal Jurnal Ilmiah Teknologi dan Rekayasa Pendas : Jurnah Ilmiah Pendidikan Dasar
Artana, Nyoman
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Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

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IDENTIFIKASI DAN ANALISIS MATERIAL CASING REGULATOR GAS Marpaung, Freddy; Artana, Nyoman
Jurnal Ilmiah Teknologi dan Rekayasa Vol 26, No 2 (2021)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/tr.2021.v26i2.4110

Abstract

Regulator gas merupakan salah satu komponen penting pada system tanki liquefied natural gas (LNG). Komponen ini didesain harus mampu bekerja pada temperature rendah ekstrim dan tekanan tinggi. Dalam keseluruhan proses desain, material memiliki peran penting sehingga designer harus dapat mengidentifikasi jenis material dengan fungsionalitas spesifik agar ditemukan konsep desain yang layak. Identifikasi material tersebut dapat digunakan sebagai informasi awal mengenai sifat mekanik dan struktur mikro dari material. Tujuan dari penelitian ini adalah menyajikan data identifikasi material casing regulator gas alam jenis Belgas P39 dan memberikan rekomendasi persyaratan material yang harus dipenuhi oleh perusahaan lokal yang tertarik untuk mengembangkan material casing regulator tersebut. Pada paper ini, identifikasi material casing regulator Belgas P39 high pressure dilakukan melalui serangkaian pengujian, diantaranya pengujian komposisi kimia, pengujian kekerasan, pengujian metalografi, dan pengujian SEM-EDS. Selanjutnya data hasil pengujian tersebut dibandingkan dengan data pembanding standar. Hasil penelitian menunjukkan bahwa material casing regulator Belgas P39 high pressure termasuk dalam paduan kuningan jenis duplex.
IMPLEMENTASI MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK PENINGKATAN KEAKTIFAN PESERTA DIDIK DALAM MATA PEMBELAJARAN IPAS SISWA KELAS IV DI SD NEGERI 5 KAWAN BANGLI I Dewa Ayu Diah Darmayanti; Nyoman Temon Astawa; Artana, Nyoman
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 Nomor 02, Juni 2026 Published
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.51575

Abstract

This study aims to describe the implementation of the Problem Based Learning (PBL) model in improving student learning activeness in the IPAS (Natural and Social Sciences) subject in Grade IV at SD Negeri 5 Kawan Bangli. The research employed a qualitative descriptive approach with a phenomenological design. Data were collected through participatory observation, in-depth interviews, and documentation. Informants consisted of the school principal, the Grade IV classroom teacher, and selected students. The findings reveal three main aspects: (1) the implementation of the PBL model was carried out systematically through the stages of problem presentation, group discussion, investigation, and presentation of results, thereby creating an active, interactive, and student-centered learning process; (2) several obstacles were encountered, including students lack of self-confidence in expressing opinions, differences in students learning abilities, and time constraints during discussions, which were addressed by the teacher through motivation, direct guidance, heterogeneous grouping, and effective time management; and (3) the application of the PBL model positively impacted students activeness, as evidenced by increased student participation, improved critical thinking skills, enhanced collaboration, and greater willingness to ask questions and respond during the learning process. These findings confirm that the Problem Based Learning model is effective in creating meaningful and active learning experiences in IPAS learning at the elementary school level. Keywords: Problem Based Learning, student activeness, IPAS, elementary school  
Co-Authors I Dewa Ayu Diah Darmayanti Marpaung, Freddy Nyoman Temon Astawa