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All Journal Empowerment : Jurnal Pengabdian Masyarakat Jurnal Basicedu Journal of Applied Data Sciences Jurnal Ilmu Pengetahuan dan Sistem Informasi Jurnal Basicedu Economics, Business, Management, & Accounting Journal Green Engineering: Journal of Engineering and Applied Science
Efvy Zamidra Zam
AMIK Depati Parbo Kerinci
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Mathematics Social Sciences

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Multi-Objective Optimization of Green Building Retrofit Strategies Considering Thermal Comfort, Energy Efficiency, and Indoor Air Quality in Tropical Climate Zones Efvy Zamidra Zam; Wahyu Caesarendra; Nopriadi Nopriadi
Green Engineering: International Journal of Engineering and Applied Science Vol. 1 No. 4 (2024): October: Green Engineering: International Journal of Engineering and Applied Sc
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70062/greenengineering.v1i4.255

Abstract

This study investigates optimal retrofit strategies for buildings in tropical climates, focusing on energy efficiency, thermal comfort, and indoor air quality (IAQ). Given the unique challenges of high temperatures, humidity, and energy demands in tropical regions, traditional retrofitting methods often fall short of achieving a balance between these critical factors. By employing a multi-objective optimization approach, this research identifies the most effective combination of retrofit solutions, including insulation, natural ventilation, and high-performance window treatments. The results show that the proposed retrofit strategy significantly reduces cooling energy consumption, while maintaining or improving occupant comfort and IAQ. Insulation, particularly external insulation, proved to be the most effective in reducing heat transfer, while natural ventilation strategies and advanced materials further contributed to improving thermal regulation. The study demonstrates that integrating passive and active retrofit measures, tailored specifically to tropical climates, leads to optimal building performance. The multi-objective optimization algorithm (NSGA-II) allowed for the generation of Pareto-optimal solutions, offering a set of trade-offs between energy efficiency, thermal comfort, and IAQ. These findings are particularly relevant for policymakers and building professionals seeking sustainable retrofit solutions in tropical regions. The study also highlights the importance of integrating energy efficiency and IAQ considerations in retrofit strategies to avoid compromising occupant health. Further research is recommended to explore the integration of advanced materials, such as phase change materials (PCMs), and to enhance IAQ management in retrofitted buildings, ensuring long-term sustainability and occupant well-being in tropical environments.
Leadership and Work Discipline as Determinants of Civil Servant Performance in Local Government Institutions Efvy Zamidra Zam
Ebisma (Economics, Business, Management, & Accounting Journal) Vol. 6 No. 1 (2026): Economics, Business, Management, & Accounting Journal (Ebisma)
Publisher : Haka Vyza Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61083/ebisma.v6i1.146

Abstract

This study aims to analyze the influence of leadership and work discipline on the performance of Civil Servants in Local Government. The research employed a quantitative approach using a survey method. The population consisted of twenty-four employees from a regional government organization, and the sampling technique used was saturated sampling, in which all population members were selected as respondents. Data were collected through questionnaires measured using a Likert scale. Data analysis was conducted using validity tests, reliability tests, multiple linear regression, t-tests, F-tests, and coefficient of determination analysis with the assistance of SPSS software. The results indicated that all research instruments were valid and reliable. Partially, leadership and work discipline had a positive and significant effect on employee performance. Simultaneously, leadership and work discipline also had a significant influence on the performance of Civil Servants. The coefficient of determination showed that leadership and work discipline explained most of the variance in employee performance. Furthermore, leadership was identified as the most dominant variable influencing employee performance. The findings indicate that improving leadership quality and strengthening work discipline can enhance the performance of civil servants in supporting effective public service delivery within local government institutions.
Co-Authors Aira, Dian mala Fithriani HAIRUL CANDRA johannes johannes Nopriadi Nopriadi R, Ferdinal Sandra, Elvina Sestriyenti, Enny Shofia Amin Sry Rosita Vivi Herlina Wahyu Caesarendra