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All Journal JTTM: Jurnal Terapan Teknik Mesin Media Publikasi Promosi Kesehatan Indonesia (MPPKI) International Journal of Ethno-Sciences and Education Research
Abdul Gafur
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Religion Aerospace Engineering Humanities Control & Systems Engineering Education Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Public Health Transportation Other

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Effect of valve opening optimization on fuel delivery and combustion efficiency in a multi-burner waste-oil heating system Burhan Hafid; Erwen Martianis; Murdani; Siti Umira; Abdul Gafur
JTTM : Jurnal Terapan Teknik Mesin Vol 7 No 1 (2026): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v7i1.2094

Abstract

The utilization of waste oil as an alternative fuel has considerable potential for small-scale heating and distillation systems; however, its combustion performance is strongly influenced by fuel flow regulation and burner configuration. Most previous studies have primarily investigated single-burner waste-oil systems, resulting in limited understanding of valve opening effects in multi-burner configurations commonly used in practical applications. This study experimentally evaluates the effect of valve opening angle on fuel delivery and combustion performance in a three-burner waste-oil stove using SAE 10W-40 waste oil. Valve openings of 30°, 35°, and 40° were tested, with all burners operating simultaneously under the same airflow conditions. Combustion performance was evaluated based on fuel consumption, combustion temperature, heat release, and thermal efficiency. Experiments were conducted under steady-state conditions with a fixed combustion duration; fuel consumption was measured volumetrically and flame temperature was recorded using K-type thermocouples, with each test repeated three times to improve data reliability. At a 40° valve opening, the fuel flow rate of 448–488 mL/min represents variations among individual burners operating concurrently, while the combustion temperature range of 633–679°C reflects the experimental spread measured across the three burners. The results show that increasing valve opening increases fuel flow and heat release; however, excessive valve opening leads to an imbalance between fuel supply and available air. At a 35° opening, the fuel flow rate is sufficiently high while still allowing adequate air entrainment, producing a more favorable air–fuel mixing condition compared to lower and higher openings. In contrast, the 40° opening causes over-fueling, resulting in unstable flames, soot formation, and incomplete combustion despite higher energy input. These conditions are directly associated with reduced operational safety due to flame instability and increased soot deposition.The main contribution of this study is providing experimental evidence on valve opening optimization in a multi-burner waste-oil combustion system, offering practical guidance for improving efficiency, combustion stability, and safe operation in waste-oil-based heating applications.
The Role Of Community In Education On Prevention Of Sexually Transmitted Diseases Abdul Gafur; Apriyanti, Eka; S Mandra, Mohammad Ahsan
International Journal of Ethno-Sciences and Education Research Vol. 6 No. 1 (2026): International Journal of Ethno-Sciences and Education Research (IJEER)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v6i1.1178

Abstract

Sexually transmitted diseases (STDs), particularly HIV/AIDS, continue to pose a major public health challenge among at-risk populations such as men who have sex with men (MSM) and transgender individuals (TG). These groups experience heightened vulnerability due to social stigma, discrimination, and limited access to inclusive health education, which often undermines prevention efforts. Population education plays a strategic role in addressing these barriers by improving knowledge, shaping attitudes, and encouraging preventive behaviors through participatory and community-based approaches. This study aims to analyze the role of population education in enhancing awareness and strengthening sexually transmitted infection (STI) prevention among at-risk groups in Parepare City, Indonesia. This study employed a qualitative descriptive design to explore participants’ experiences and community dynamics. Data were collected through participant observation, thematic dialogues, group discussions, and documentation of educational activities. The findings reveal that population education delivered through interactive strategies such as community dialogues, educational drama, public campaigns, and integration with local health services successfully increased community participation and engagement. These approaches contributed to improved awareness of HIV/AIDS prevention, greater utilization of information and communication technology for health information, and the internalization of anti-stigma and non-discriminatory values. However, implementation challenges were identified, particularly weather-related factors that affected participant attendance and activity scheduling. Overall, the study concludes that community-based population education represents an effective promotive and preventive strategy for STI prevention among at-risk populations and has strong potential to support inclusive and sustainable public health interventions at the local level.
Health Services for Marginalized Groups: A Sociological Study on Construction Workers in Paccerakkang, Makassar City Alim, Andi; Adam, Arlin; Minarti, Asriani; Adhyatma. A; Muhammad Syafri; Abdul Gafur; Riswan Marsal
Media Publikasi Promosi Kesehatan Indonesia (MPPKI) Vol. 9 No. 5 (2026): May 2026
Publisher : Fakultas Kesehatan Masyarakat, Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/mppki.v9i5.8977

Abstract

Introduction: This study aims to gain an in-depth understanding of the experiences of construction workers in accessing health services in Paccerakkang Subdistrict, Biringkanaya District, Makassar City. As part of the informal sector workforce, construction workers face various health risks as well as structural limitations in obtaining adequate health services. This study adopts a health sociology perspective to examine how social, economic, and public policy factors influence access to health services among informal workers. Methods: This study employed a qualitative approach with a phenomenological design. The research participants consisted of six construction workers selected purposively based on the criteria of being aged 18–60 years, actively working as construction workers, and having experience in accessing health services within the past year. Data were collected through in-depth interviews, participant observation in the workers’ work and residential environments, and documentation to strengthen the empirical context of the study. Data analysis was conducted using thematic analysis through processes of data reduction, categorisation, and meaning-making to identify patterns of experience and the participants’ interpretations of access to health services. Results: The findings indicate that construction workers perceive health services not only as a means of medical treatment but also as a form of social protection that helps maintain work productivity and family well-being. The main barriers to accessing health services include economic constraints, unstable income, long working hours, and the lack of occupational safety facilities. Some participants also highlighted complicated administrative procedures and high treatment costs, although in general they did not experience discrimination from health professionals. To overcome these barriers, construction workers developed adaptive strategies such as utilising formal health services and traditional treatment, maintaining health through healthy lifestyles, and relying on social support from family members and co-workers. Conclusion: This study concludes that the experiences of construction workers in accessing health services are shaped by the interaction of economic, social, occupational, and health policy factors. Therefore, stronger synergy between government institutions, health service providers, and worker communities is required to create a health service system that is more equitable, inclusive, and responsive to the needs of informal sector workers in urban settings.
Co-Authors Adhyatma. A Andi Alim, Andi Arlin Adam, Arlin Burhan hafid Eka Apriyanti Erwen Martianis Minarti, Asriani Muhammad Syafri Murdani Riswan Marsal S Mandra, Mohammad Ahsan Siti Umira