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All Journal Journal of English Education and Teaching (JEET) Jurnal Maritim Malahayati
Alberto
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Control & Systems Engineering Electrical & Electronics Engineering Environmental Science Languange, Linguistic, Communication & Media Transportation

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ANALISA FATIGUE LIFE PROPELLER PADA KAPAL LATIH MALAHAYATI ACEH Kurniawan, Dedi; Alberto; Nurman, Salfauqi; Herlambang, Agus
Jurnal Maritim Malahayati Vol. 5 No. 1 (2024): Jurnal Maritim Malahayati
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat, Politeknik Pelayaran Malahayati

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Abstract

Propeller merupakan salah satu komponen penting karena tanpanya sebuah kapal tidak akan bisa melakukan fungsi dan kegunaannya. Namun, sebuah baling-baling kapal harus memiliki kemampuan yang cukup dalam menopang gaya-gaya yang bekerja terhadapnya secara terus-menerus, yang dapat mengaki-batkan terjadinya keretakan dan akhirnya mengalami kepatahan. Analisa fatigue life propeller pada Kapal Latih Malahayati Aceh diperlukan untuk dapat mengetahui batas waktu sehingga dapat menghindari ter-jadinya deformasi dan juga kemungkinan kecelakaan kerja pada saat kapal latih tersebut beroperasi. Pem-bebanan yang diberikan didapat dari hasil contour pressure pada analisa CFD terlebih dahulu yang kemudian di-running dengan menggunakan Metode Elemen Hingga (MEH) untuk mendapatkan Hot Spot Stress. Hasilnya didapatkan Hot Spot Stress sebesar 3,515 x 1011 Pa yang berlokasi di daerah root suc-tion back propeller akibat perbedaan tekanan yang cukup signifikan pada bagian face dan back propeller. Nilai tegangan tersebut dapat digunakan untuk mendapatkan life cycle minimum sebesar 3,32 x 109 cycle yang kemudian didapatkan umur dari material selama 32,21 tahun.
Lecturer’s Personal and Social Competence Toward Students’ Writing Proficiency in EFL Classroom Limbong, Sunarlia; Alberto; Frans Tandibura
Journal of English Education and Teaching Vol. 7 No. 4 (2023): Journal of English Education and Teaching
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jeet.7.4.914-927

Abstract

The competency of a lecturer is required for a successful learning process that leads to increased student accomplishment. The present study investigates (1) the profile of students' writing skills at the Port Shipping Management Department of Polytechnic of Makassar Merchant Marine (PIP) through a writing test, and (2) the influence of lecturers' personal and social competence on students' writing proficiency in English as a Foreign Language (EFL) classroom settings using qualitative data. The study employed purposive sampling to select 3 lecturers and 30 second-semester students from the Port Shipping Management Department of PIP. Quantitative data were collected through a writing test administered to the 30 students, while qualitative data were gathered using semi-structured interviews with the 5 lecturers, focus group discussions with the students, and classroom observations. The findings revealed various levels of writing proficiency among PIP students and highlighted the positive impact of lecturers' personal and social competence on students' writing proficiency. The better the personal influence and social competence of the lecturers, the better the students' writing capabilities are. The study emphasizes the need for continued development of lecturers' personal and social competence to foster a supportive and engaging learning environment in maritime education and training.
Co-Authors Dedi Kurniawan Frans Tandibura Herlambang, Agus Limbong, Sunarlia Salfauqi Nurman, Salfauqi