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Department Of Marine Engineering, Institut Teknologi Sepuluh Nopember
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Performance and carbon emissions of a diesel/oxy-hydrogen dual-fuel engine with oxy-hydrogen injection variation under low and medium load conditions Felayati, Frengki Mohamad; Prasutiyon, Hadi; Janah, Sholikhatul; Wijaya, Dimas Hadi; Saputra, Mukhammat Bayu; Semin, Semin
International Journal of Renewable Energy Development Vol 13, No 2 (2024): March 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.57983

Abstract

Reducing carbon emissions such as carbon dioxide (CO2) and carbon monoxide (CO) from diesel engines struggled with engine performance challenges and fossil fuel limitations. Besides, huge transportation such as ships hardly replaced diesel engines due to the higher thermal efficiency and low operation cost. Oxy-hydrogen gas, as a carbon-free gas, could potentially improve diesel engine performance and carbon emissions. Most of the studies tried to identify the effect of oxy-hydrogen induction into diesel engine combustion on performance and emissions. However, this study evaluated oxy-hydrogen injector sizes to the diesel engine performance and carbon emissions at several loads and several engine speed conditions. Overall, the result showed that the oxy-hydrogen gas injection into the diesel engine’s intake port improved the performance and carbon emissions compared to the single diesel fuel as a baseline. High engine performance with low carbon emissions could be achieved at low and medium engine load conditions with high engine speeds. Moreover, smaller oxy-hydrogen injector sizes were suitable for the medium engine load and vice versa, to improve the performance and carbon emissions. At low load, the engine performance improvement of engine torque, specific fuel consumption, and thermal efficiency were 1800 to 2200 rpm. Moreover, the CO2 and CO emissions reductions were also suitable with 2200 rpm with a bigger oxy-hydrogen gas injector (6 mm). Furthermore, at medium load, the engine performance improved at 1400 rpm but the CO2 and CO emissions were lower at 2200 rpm with a small oxy-hydrogen gas injector (4 mm). The engine operation at 2200 rpm with a 4 mm injector also improved the engine performance regarding carbon emissions reduction. However, injecting oxy-hydrogen gas into diesel engines had the potential to enhance the engine performance and reduce carbon emissions, moving closer to achieving zero emissions
Pengembangan Aplikasi Mobile untuk Meningkatkan Kesehatan Mental di Kalangan Remaja semin, semin
MUJAHADA: Jurnal Pengabdian Masyarakat Vol. 1 No. 1 (2023): MUJAHADA: Jurnal Pengabdian Masyarakat
Publisher : STAI Terpadu Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54396/mjd.v1iI.977

Abstract

This research focuses on the development of a mobile application aimed at improving mental health among adolescents. The study recognizes the importance of addressing mental health issues in the adolescent population and the potential of mobile technology in providing accessible and effective interventions. The mobile application incorporates features such as mood tracking, relaxation exercises, mental health information, and access to support resources. Through a community engagement approach, the application was developed and evaluated in collaboration with adolescents. The results indicate that the mobile application provided valuable support for adolescents in managing their mental health and resulted in positive changes in their well-being. The findings highlight the significance of integrating technology-based interventions into existing mental health services for a holistic approach in promoting adolescent mental health.
CLASS MANAGEMENT EVALUATION IN IMPROVING EDUCATOR PROFESSIONALISM Semin, Semin; Patimah, Siti
INCARE, International Journal of Educational Resources Vol. 4 No. 1 (2023): June 2023
Publisher : FKDP (Forum Komunikasi Dosen Peneliti)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/incare.v4i1.697

Abstract

Effective classroom management plays an important role in enhancing the interactions and relationships between teachers and students. An effective classroom management process involves establishing clear rules and procedures, using a variety of learning strategies, and effective communication between teachers and students. In the context of SD IT Cendikia Banjar Agung Tulang Bawang, this study aims to analyze the impact of effective classroom management on improving interaction and relationships between teachers and students. The results of the study show that an effective classroom management process at SD IT Cendikia Banjar Agung Tulang Bawang involves the establishment of clear rules and consistent application. Teachers use a variety of learning strategies to facilitate student involvement in the learning process. In addition, communication between teachers and students is also considered important in creating good relationships. Teachers demonstrated good communication skills in presenting subject matter, listening actively, and providing constructive feedback to students. In the context of increasing interactions and relationships between teachers and students, indicators of effective classroom management include mutual understanding, mutual trust, and active involvement in the learning process. Teachers who are able to listen empathetically, provide individual attention to students, and create an inclusive classroom atmosphere, are able to strengthen the bond between teacher and student. Thus, effective classroom management at SD IT Cendikia Banjar Agung Tulang Bawang has a positive impact on increasing interaction and harmonious relationships between teachers and students.
Co-Authors A.A. Ketut Agung Cahyawan W A.Z.M. Fathallah Adhi Iswantoro Agus A. Munawar, Agus A. Andre Dwiky Kurniawan B. Cahyono Bambang S. Purwoko Cahyono, Beny Cahyono, Beny Cahyono, Beny Cahyono, Beny Daniel Fr Sinaga Deswandi Jefrimananda, Muhammad Hadrian Fathallah, Aguk Zuhdi M. Fathallah, Aguk Zuhdi Muhammad Frengki Mohamad Felayati Hari Prastowo I Made Ariana I Wayan Budiastra I.M. Ariana Iswantoro, Adhi Janah, Sholikhatul Joko Widodo Kriswana, Deni Lady Lengkey Pahlevi, Nauval Prasetiyo, Yudha Prasutiyon, Hadi ramdhan febrianto saputra Rohmawati, Wiwin Saputra, Mukhammat Bayu saputra, ramdhan febrianto Siti Patimah Sutikno Sutikno Waskito, Puthut Wicaksono, Juniaris Agung Wijaya, Dimas Hadi Yudha Prasetiyo Zulfahrizal Zulfahrizal, Zulfahrizal