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All Journal Abjadia, International Journal of Education Jurnal Ilmiah Peuradeun JURNAL REKAYASA SISTEM INDUSTRI Majalah Ilmiah Pengkajian Industri Jurnal Ilmiah Profesi Pendidikan Automotive Experiences Jurnal Ilmiah AgriSains Jurnal Pepadu Journal of Health Sciences and Epidemiology
Mohammad Ismail
Fakultas Tarbiyah Institut Studi Islam Darussalam Gontor
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences Transportation Other

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Optimised Flywheel-Assisted Regenerative Braking for Enhanced Energy Recovery and Voltage Stability in Electric Vehicles Masri, Jafar; Ismail, Mohammad
Automotive Experiences Vol 8 No 2 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13323

Abstract

This study presents a flywheel-assisted regenerative braking system (FARBS) designed to improve energy recovery and voltage stability in electric vehicles (EVs). Conventional regenerative braking systems (RBS) suffer from short energy retention durations and voltage fluctuations, limiting their efficiency. The proposed system incorporates a spherical shell flywheel (120 mm radius, 20 mm thickness, 3 kg mass) directly into the braking mechanism to prolong energy recovery and optimise braking efficiency. Experimental results demonstrate a 439% increase in energy recovery duration, extending from 1.15 seconds (2000 RPM) to 6.2 seconds (4500 RPM). Voltage retention improves significantly, increasing from 10.3V to 19.2V, ensuring sustained voltage delivery. Kinetic energy storage attains 580 J at 4500 RPM, exhibiting a 23.4% increase over 2000 RPM. The flywheel system quadruples power output longevity, sustaining 6.40 W for 6.2 seconds at 4500 RPM, compared to 2.2 seconds without the flywheel. Energy recovery efficiency peaks at 16 J at 4500 RPM, an improvement of 275% in comparison to the baseline 4 J. Optimisation analysis confirms that increasing flywheel mass (1 kg to 3 kg) improves energy recovery by 194%, while a spherical shell flywheel improves energy recovery, achieving 327 J. This is twice as much as that of a solid disk (162 J). Carbon fibre outperforms steel, boosting energy recovery by 94%, while increasing the thickness from 10 mm to 20 mm, and resulting in a 200% efficiency gain. These findings underline the superiority of flywheel-assisted energy recovery, paving the way for high-efficiency braking solutions in EVs, public transportation and railway networks.
A Qualitative Approach towards the Understanding of Managerial Employees in Islamic Organizations Abdullah, Azwan; Ismail, Mohammad; Yaacob, Mohd Rafi; Kamarudin, Mohd Khairy; Mohd Alwi, Mohd Afifie; Muhammad, Mohd Zulkifli; Wan Mohd Nasir, Wan Nadiah; Hilaluddin, Nusaibah
Jurnal Ilmiah Peuradeun Vol. 7 No. 3 (2019): Jurnal Ilmiah Peuradeun
Publisher : SCAD Independent

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26811/peuradeun.v7i3.465

Abstract

The critique on the failure of Islamic organizations to represent the Islamic nature has been pointed towards employees’ competency in understanding the Islamic concept. Hence, this study seeks to delve into the understanding of the employee in Islamic organizations regarding the concept, implementation and challenges in such organizations by employing the qualitative method. The study involves three Islamic organizations namely Islamic Banking, Takaful and Islamic Property Management Company located in three states of the East Coast of Peninsular Malaysia i.e. Kelantan, Terengganu and Pahang. Managerial employees from the three organizations were interviewed and the outcomes were triangulated with the experts. The findings show understanding among managerial employees in Islamic organizations is appropriate but there are still more that need to be improved.
Reproductive Efficiency of Donggala Cattle in Donggala Regency: Efisiensi Reproduksi Induk Sapi Donggala di Kabupaten Donggala Rusdin, Rusdin; Saifullah, Saifullah; Ismail, Mohammad; Rusiyantono, Yohan; Teguh, Muhammad; Eka Riandhana, Taufiq; Perdana, Sigit
Jurnal Ilmiah AgriSains Vol. 25 No. 1 (2024): Jurnal Ilmiah AgriSains
Publisher : Fakultas Peternakan dan Perikanan, Universitas Tadulako, Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/jiagrisains.v25i1.2024.21-27

Abstract

Reproduksi merupakan kunci utama dalam pengembangbiakan ternak, karena proses reproduksi ternak yang normal diikuti oleh produksi ternak yang baik. Reproduksi dianggap sebagai salah satu aspek untuk meningkatkan produksi dan populasi ternak. Penelitian ini bertujuan untuk mengetahui efisiensi reproduksi Sapi Donggala di Kabupaten Donggala. Penelitian ini dilaksanakan di 5 kecamatan yaitu Kecamatan Tanantovea, Sindue Tobata, Sindue Tambosabura, Balaesang, dan Banawa Tengah . Penentuan lokasi menggunakan purposive sampling dan responden ditentukan secara accidental sampling. Pengambilan data menggunakan metode sampling terhadap peternak Sapi Donggala di 5 kecamatan tersebut. Data yang dikumpulkan adalah data Tahun 2022.  Variabel yang diamati berupa karakteristik peternak dan data reproduktivitas. Karakteristik peternak terdiri dari umur, pendidikan, dan pengalaman beternak. Sedangkan data reproduktivitas berupa umur pertama dikawinkan, lama kebuntingan, dan Calving Interval (CI).  Hasil penelitian diperoleh umur peternak terbanyak yaitu umur 15-65 tahun (96%), tingkat pendidikan terbanyak yaitu SMP (42%), pengalaman beternak tertinggi yaitu 3-10 tahun (67%), umur pertama dikawinkan tertinggi umur 1,6-2 tahun (46%), lama kebuntingan sebanyak 270-290 hari (69%), dan calving interval (CI) diatas 12 bulan (73%). Hasil penelitian menunjukkan bahwa efisiensi reproduksi Sapi Donggala di Kabupaten Donggala masih tergolong rendah
Co-Authors Abdullah, Azwan Agus Budiman Basariah Basariah, Basariah Che Aziz, Roslizwati Edi, Maria Grace Putri Edy Herianto Harimukti, Gatot Basuki Hilaluddin, Nusaibah Hong, Lu Man Jumrawati, Jumrawati Kamarudin, Mohd Khairy Krisdyana, Bekti Masri, Jafar Mohd Alwi, Mohd Afifie Mohd Rafi Yaacob, Mohd Rafi MUHAMMAD TEGUH, MUHAMMAD Muhammad Zubair Muhammad, Mohd Zulkifli Muttaqin, Rokhmat Nabila, Wardah Hani Narto, Narto Nunik Ningtiyasari, Nunik Nurwijayanti Perdana, Sigit Rohmawati, Indah Rusdin Rusdin Saifullah Saifullah Sakinah, Khoirus Samsul Hadi Saripah, Anna Sapti Sawaludin, Sawaludin Sha'ari, Muhammad Azim Abu Hassan Solly Aryza Taufiq Eka Riandhana Wan Mohd Nasir, Wan Nadiah Yohan Rusiyanto Zulkiffli, Wan Farha Wan