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All Journal Journal of Mechanical Engineering Science and Technology JURNAL PENDIDIKAN TAMBUSAI
Hanifudin, Muhamad
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Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Jejak Leluhur, Langkah Masa Kini: Transformasi Budaya Masyarakat Bromo di Era Global Rahmawati, Maria Yustiana; Habibah, Noviana; Wiyono, Rima Faradillah Wati Firdaus; Hanifudin, Muhamad; Purnama, Ivan Fadillah Putra; Khusumadewi, Ari
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.27830

Abstract

Masyarakat Bromo, dengan warisan leluhur yang kaya dan praktik budaya unik, menghadapi dinamika globalisasi yang menghadirkan tantangan sekaligus peluang. Studi literatur ini bertujuan untuk menganalisis secara mendalam jejak-jejak tradisi dan nilai budaya masyarakat Bromo, serta mengidentifikasi bagaimana proses transformasi budaya terjadi seiring dengan derasnya arus globalisasi. Melalui penelusuran berbagai sumber pustaka relevan, penelitian ini mengeksplorasi adaptasi, resistensi, dan inovasi budaya yang dilakukan oleh masyarakat Bromo dalam mempertahankan identitas mereka di tengah perubahan zaman. Temuan studi ini diharapkan dapat memberikan wawasan komprehensif mengenai kompleksitas interaksi antara warisan budaya lokal dan pengaruh global, serta implikasinya terhadap keberlanjutan budaya masyarakat Bromo di masa depan.
Investigation of Drag Force and Downforce on Two Racing Motorcycles in Slipstream Conditions Hanifudin, Muhamad; Jatisukamto, Gaguk; Darsin, Mahros; Kustanto, Muh. Nurkoyim; Saleh, Azmi; Prasetyono, Suprihadi; Sarwono, Catur Suko
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i12025052

Abstract

The performance of modern racing motorcycles is greatly influenced by their aerodynamics. Slipstreaming occurs during a race when a rider closely follows another, especially on a straight track. The effect can reduce aerodynamic drag and increase the overall speed of the rider behind. This study investigates the aerodynamic effects of slipstreaming on a racing motorcycle using computational fluid dynamics. This study also considers its effect on both drag force and downforce, which affects motorcycle stability. A 3D CAD model of a racing motorcycle and a rider in a crouching position was used as the object of research. CFD simulations were carried out using the RANS Steady State solver with the k-ω-SST turbulence model. The simulations evaluated the effect of varying distances between motorcycles on slipstream performance, as well as varying motorcycle speeds. The results show the effect on drag force and downforce for the trailing motorcycle. This is due to the shielding effect of the motorcycle in front, which creates a low-pressure zone behind it. Additionally, the turbulence behind the racing motorcycle also affects its downforce. Optimizing the distance between motorcycles in the slipstream allows riders to improve overtaking performance. It also reduces adverse effects on motorcycle stability caused by the slipstream's influence on downforce. Furthermore, it can be used to develop aerodynamic modifications to racing motorcycles that can utilize the slipstream more effectively.
Co-Authors Ari Khusumadewi Azmi Saleh Bakhrudin All Habsy, Bakhrudin All Catur Suko Sarwono Chatarina Umbul Wahyuni Gaguk Jatisukamto Habibah, Noviana Jannah, Ilda Miftakhul Khairunnisa Khairunnisa Kustanto, Muh. Nurkoyim Mahros Darsin Purnama, Ivan Fadillah Putra Rahmawati, Maria Yustiana Wiyono, Rima Faradillah Wati Firdaus