Claim Missing Document
Check
Articles

Strategies and Challenges in Promoting Teacher Discipline: Insights from Vocational High Schools in Indonesia Kamaruzzaman, Kamaruzzaman; Bahrun, Bahrun; Khairuddin, Khairuddin
Journal of Educational Management and Learning Vol. 3 No. 2 (2025): November 2025
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/jeml.v3i2.253

Abstract

This study investigates the role of principals in promoting and sustaining a disciplined culture among teachers in vocational high schools within West Aceh District, Indonesia. Employing a qualitative, descriptive research design, the study focuses on three main objectives: examining the specific disciplinary programs implemented by principals, exploring how these initiatives are evaluated for effectiveness, and identifying the challenges principals face in ensuring consistent discipline among teachers. Data were collected through open-ended questionnaires distributed to teachers and semi-structured interviews conducted with principals, enabling a comprehensive understanding of both perspectives. Thematic analysis revealed that principals prioritize structured program implementation and regular evaluation as key strategies for managing discipline. Despite overall positive responses to the effectiveness of these initiatives, teachers highlighted several challenges, including inconsistent policy enforcement and varying levels of commitment, which hinder the establishment of a cohesive disciplinary environment. The findings suggest that while principals play a crucial role in shaping discipline, addressing specific challenges through additional resources and teacher engagement could further enhance policy adherence and effectiveness. This study provides valuable insights into the impact of leadership on school discipline and offers recommendations to strengthen disciplinary practices in vocational education settings.
Physically activated corn cob carbon for congo red and methanil yellow removal Sholehah, Faridatun; Adawiyah, Rabiatul; Bahrun, Bahrun
Acta Chimica Asiana Vol. 8 No. 2 (2025)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v8i2.272

Abstract

The conversion of agricultural residues into sustainable adsorbents provides an environmentally responsible pathway for advanced wastewater treatment. In this work, physically activated carbon was synthesized from corncob, an abundant and underutilized agricultural byproduct, through carbon dioxide activation at elevated temperatures. Comprehensive characterization using BET surface area analysis, SEM-EDX, and FTIR confirmed the formation of a highly porous structure with abundant surface functional groups, favourable for dye adsorption. The adsorbent exhibited excellent performance in removing Congo Red (CR) and Metanil Yellow (MY), achieving maximum adsorption capacities of 59.88 mg/g and 30.47 mg/g, respectively. The Langmuir isotherm provides a good description of the equilibrium data, while the kinetic results follow the pseudo-second-order model, indicating that monolayer chemisorption is the dominant mechanism. These findings underscore the potential of corncob-derived activated carbon as a cost-effective, renewable, and high-performance material for sustainable wastewater remediation
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Hadi Agustinah Setyaningrum, Agustinah Alaidin, Alaidin Amalia, Mutia Amrizal Amrizal Anwar Anwar Arfansyah, Arfansyah Artania Adnin Tri Suma Badrawati, Kadek Susi Caribu Hadi Prayitno Cut Morina Zubainur Deliana, Ida desy wulandari Devayani, Erlina Eko Hendarto Erlina Erlina Geh, Nyak Hasmidar, Hasmidar Hayatun Nufus HENDRIAWAN, HENDRIAWAN Hizir Sofyan Husnidar, Husnidar Ibrahim, Husaini Ichsan Ichsan Ismail Ismail Ismawati, Nurliza Jali, Jafalizan Md. Kamaruzzaman Kamaruzzaman, Kamaruzzaman Khairuddin - Khoiriyah Khoiriyah Labanni, Arniati M. Duskri Maisura Maisura Midriani, Noni Muh Ade Artasasta Muhammad Irfan Muhammad Nasir Mulia, Vani Monita Multhaza, Multhaza Munasik Munasik Murniati . Murniati AR, Murniati Murniati, murniati AR Musa, Bulkis Mushadi, Mushadi Muslem, Asnawi MW, Yayuk Nasir Usman Nastarika, Sintia Nessa, Rahmatun Niswanto Niswanto, Niswanto Nufus, Syukratun Nunuk Hariani Soekamto Nur Hidayat Nuranda, Puji Putri, Karmila Eka Rabiatul Adawiyah Rahmah Johar Rahmatullah Rahmatullah Rahmi Wardah Ningsih Rasyid, Herlina Rasyid, Suparta Rizka, Sitti Muliya Rizki Maulana, Rizki Rosmiati Rosmiati Rusli Yusuf S Siswanto Safinatunnaja, Safinatunnaja Safrianti, Riza Safrida, Usma Riza Safrizal, Andi Santos, Mariano Dos Septina, Phuja Tawilla Sepyana, Anisa Sholehah, Faridatun Sigar, Ihsan Yosinanda SITI NAILA FAUZIA, SITI NAILA Solly Aryza Syahrir, Nur Hilal A. Syaridin, Syaridin Syarifudin, Ahmad Tebe, Sry Rasyiidu Thalib Thalib Triana, Mailis Usman, Nasir Usman Valgunadi, Dharmaseno Wiasti, Ika Anggie Wijiatmo, Agan Yanti, Yulisma Yuhrizal, Yuhrizal Yulianti Yulianti Yusrizal Yusrizal Yusuf, Mohammad Taufik Zakaria, Nurhijrah Binti Zari, Aufa Rafika Zari