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All Journal BAHASA DAN SASTRA Jurnal Sosio Ekonomika Bisnis Jurnal Online Mahasiswa (JOM) Bidang Ilmu Sosial dan Ilmu Politik I-ECONOMICS: A Research Journal on Islamic Economics International Journal Pedagogy of Social Studies Desimal: Jurnal Matematika Jurnal Review Pendidikan dan Pengajaran (JRPP) Kappa Journal Ekombis: Jurnal Fakultas Ekonomi Journal of Islamic Economics and Finance Studies JURNAL BIOSHELL Jurnal Gramaswara: Jurnal Pengabdian kepada Masyarakat Makara Journal of Science Pedagogik : Jurnal Pendidikan Guru Sekolah Dasar At-Tamwil: Journal of Islamic Economics and Finance Jurnal Manajemen, Akuntansi, Ekonomi Aslamiah: Jurnal Pendidikan, Ekonomi, Sosial dan Budaya Al-ihsan : Journal of Community Development in Islamic Studies International Journal for Advanced Research Jurnal Literasi Indonesia
Siti Mardiah, Siti
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Public Health Social Sciences Other

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Effect of Niobium Addition on Corrosion Behavior, Mechanical Properties, and Microstructures of U6Zr Alloys in an Aerated Environment Masrukan, Masrukan; Handoko, Djati; Djuhana, Dede; Sigit, Rohmad; Al Hasa, M. Husna; Adi, Wisnu Ari; Mardiah, Siti
Makara Journal of Science Vol. 29, No. 4
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The effect of Nb addition on the corrosion behavior of U–6Zr alloys within an aerated, demineralized water (DW) environment (pH 5.61) and its correlation of this addition with the mechanical and microstructural properties of the alloys were investigated. The U–6Zr–xNb alloys (x = 1, 4, and 7 wt.%) were synthesized by arc-melting U, Zr, and Nb. Additionally, the samples were mounted and polished, after which they were subjected to electrochemical corrosion analysis using a potentiostat. This evaluation was conducted in a DW medium (pH 5.6), representing an aerated atmosphere, at room temperature (27°C) and a potentiodynamic scan rate of 1 mV/cm2. The results demonstrate that Nb addition to the U–6Zr alloy, which yielded a U–6Zr–xNb (x = 1.4 and 7 wt.%) alloy, influenced the corrosion behavior in media, exhibiting a slightly acidic pH (5.61). Nb additions of up to 4 wt.% caused a continuous increase in the open-circuit potential, corrosion-current density, and corrosion rate (CR); however, these values decreased with the continuous increase in Nb concentrations to 7 wt.%. Furthermore, microstructural analysis via scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed that the corrosion products across almost all U–6Zr–xNb test samples (x = 0, 1, 4, and 7 wt.%) were primarily stable uranium dioxide, which formed a protective layer, followed by oxynitride and zirconium(IV) oxide.Overall, the findings indicated that the varying Nb contents (1, 4, and 7 wt.%) dictated the CR, mechanical properties, and microstructure of the alloys. Ultimately, this study demonstrates the synthesis of U–6Zr–xNb alloys (x = 0, 1, 4, and 7 wt.%) with enhanced performance characteristics.
Integrasi Problem Based Learning, Google Sites, dan Outcome-Based Education dalam Meningkatkan Keterlibatan Mahasiswa Sihotang, Sabrina Erisa Aulia; Almas, Khairunnisa Umi; Amelia; Silitonga, David Christian; Mardiah, Siti; Rini khairani Harahap; Sitanggang, Yohanna; Zahara, Dwi Atika; Meiriza, Mica Siar
Jurnal Gramaswara: Jurnal Pengabdian kepada Masyarakat Vol. 6 No. 2 (2026): Jurnal Gramaswara: Jurnal Pengabdian kepada Masyarakat
Publisher : Faculty of Cultural Studies, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.gramaswara.2026.006.02.04

Abstract

Keterlibatan mahasiswa merupakan salah satu indikator penting dalam menentukan kualitas proses dan hasil pembelajaran di pendidikan tinggi. Namun, pembelajaran yang masih berpusat pada dosen sering kali membatasi partisipasi aktif mahasiswa, terutama pada materi yang menuntut kemampuan analitis dan pemecahan masalah. Penelitian ini bertujuan menganalisis pengaruh penerapan Problem Based Learning (PBL) berbantuan Google Sites dalam kerangka Outcome-Based Education (OBE) terhadap keterlibatan mahasiswa pada pembelajaran kinerja pembangunan daerah. Penelitian menggunakan pendekatan kuantitatif dengan desain survei eksplanatori. Sampel penelitian berjumlah 40 mahasiswa Program Studi Pendidikan Ekonomi yang dipilih melalui teknik purposive sampling. Data dikumpulkan menggunakan kuesioner yang telah melalui uji validitas dan reliabilitas, kemudian dianalisis menggunakan regresi linear sederhana dengan bantuan IBM SPSS Statistics 25. Hasil penelitian menunjukkan bahwa implementasi PBL berbantuan Google Sites dalam kerangka OBE berpengaruh positif dan signifikan terhadap keterlibatan mahasiswa dengan nilai signifikansi 0,002 (p < 0,05). Nilai koefisien determinasi sebesar 0,225 menunjukkan bahwa model pembelajaran yang diterapkan mampu menjelaskan 22,5% variasi keterlibatan mahasiswa. Temuan ini menunjukkan bahwa integrasi pembelajaran berbasis masalah, teknologi digital, dan pendekatan berbasis capaian dapat menciptakan pengalaman belajar yang lebih aktif, partisipatif, dan bermakna. Penelitian ini berkontribusi pada pengembangan strategi pembelajaran di perguruan tinggi melalui integrasi model pembelajaran, teknologi digital, dan orientasi capaian pembelajaran dalam meningkatkan keterlibatan mahasiswa.
Co-Authors Abdullah Sahroni Abdullah, Saqyllah Zahra Achi Rinaldi Almas, Khairunnisa Umi Amelia Andi Taufiq Umar Aryanto, Rudi Atika Zahara, Dwi Atika Zahra, Dwi Aulia Sihotang, Sabrina Erisa Aulia, Sabrina Erisa Badrul Wajdi Batu, Siska Lumban Dede Djuhana Dharmono Dwi Atika Zahara Erisa Aulia Sihotang, Sabrina Fajri Ryan Isnandar, Fajri Ryan Fanny Sumirat, Fanny Fartina Fartina Fauziyyah, Nur Fredysyah Putra Handoko, Djati Hari Wibowo Irawan, Fais Isfandayani FAI Jelita Angeli Purba Khoiriyah, Ummi Lejon Simamora, Kevin Litriani, Erdah M. Husna Al Hasa Mas, Khairunnisa Umi Al Masrukan Masrukan Meiriza, Mica Siar Nababan, Stevani Nurul Hidayati Utami Rafika Rahmawati Ramadhani, Nur Rany Widyastuti Revita Yuni Rima Rikmasari, Rima Rini Khairani Harahap Saputra, Rambo Sari Margaret Julianty Silaban, Putri Sianturi , Rejosu Vanhot Sigit, Rohmad Sihotang, Sabrina Erisa Aulia Silitonga, David Christian Sitanggang, Yohanna Sutisna Sutisna Tias, Elsa Ayuning Tsamarul Hizbi, Tsamarul Umi Al Mas, Khairunnisa Wisnu Ari Adi Yoserizal " Zahara, Dwi Atika Zahra, Dwi Atika