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All Journal Sport and Fitness Journal Jurnal Energi Dan Manufaktur Teknika: Jurnal Sains dan Teknologi Jurnal Mechanical Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Jurnal Teknika Mesin International Journal of Engineering and Emerging Technology JSES : Journal of Sport and Exercise Science Jurnal Stamina Natural Sciences Engineering and Technology Journal Majalah Ilmiah Olahraga (MAJORA) Journal of Applied Science, Engineering and Technology (J. ASET) Asian Journal Science and Engineering Jurnal Pengabdian Kepada Masyarakat Jurnal Farmasi dan Farmakoinformatika
Ainul Ghurri
Program Studi Teknik Mesin, Fakultas Teknik Universitas Udayana
Aerospace Engineering Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation

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Thermal Analysis and Battery Life of Lithium-Ion 60 Volt / 23 Ah with Variation of Engine Rate on 3000 W Electric Motorcycle Prototype Arif Devi Dwipayana; Ainul Ghurri; Suprapta Winaya
Asian Journal Science and Engineering Vol. 4 No. 1 (2025): Asian Journal Science and Engineering
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51278/ajse.v4i1.2043

Abstract

Lithium-ion batteries in electric vehicles face challenges in terms of energy conversion efficiency and thermal resistance. One of the main factors affecting battery performance is the variation in engine speed, which has an impact on current consumption, voltage changes, and an increase in battery temperature. This study aims to comprehensively analyze the effect of engine speed variation on the electric current consumption, battery life, and thermal characteristics of a 60V/23Ah lithium-ion battery in a 3000W electric motorcycle prototype. In addition, this research also evaluates the durability of the battery under varying operational conditions to identify potential optimizations of the battery management system. The methods used in this research involved MATLAB-based experiments and simulations. Tests were conducted by measuring battery current, voltage, and temperature at six different engine speed levels, and then compared with simulation results developed using a mathematical model based on motor efficiency and battery internal resistance. The results show that an increase in engine speed is directly proportional to the current consumption and a decrease in battery voltage. In addition, the battery temperature increases steadily, with relatively small differences between experimental and simulation results. This research contributes to a better understanding of the energy dynamics of electric vehicle battery systems and offers a simulation model approach to optimizing the design of battery management systems. The results of this study can be used to improve energy conversion efficiency and extend battery life in electric vehicles. Further research can be conducted by considering more complex environmental parameters, such as cooling effects and vehicle dynamic load variations.
The Effect of Giving Three Exercises on Reducing Pain for Low Back Pain Sufferers in Online Motorcycle Taxi Drivers Gerhanawati, Ifa; Rakhmawati, Hafizah Sururul Nur; Ghurri, Ainul; Atmaja, Danuditya Purna; Ndayisenga, Japhet
JSES : Journal of Sport and Exercise Science Vol. 8 No. 2 (2025): September
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jses.v8n2.p143-151

Abstract

Purpose: Prolonged static sitting for ≥6 hours among online motorcycle taxi drivers increases lumbar load, reduces flexibility, and contributes to non-specific low back pain. This study aimed to determine the effectiveness of the Three Exercises program in reducing pain intensity in this population. Materials and Methods: This study used a randomized controlled trial (RCT) design involving 30 online motorcycle taxi drivers aged 22–60 years who met the inclusion criteria. Participants were randomly assigned to an intervention group receiving Three Exercises (knee to chest, pelvic tilting, and child pose) or to a control group. The intervention was performed 3 times per week for 12 weeks, with two sets of 10 repetitions per session, maintaining each position for 7 seconds with 3 seconds of rest. Pain intensity was measured using the Visual Analogue Scale (VAS) before and after the intervention. Statistical analysis used Wilcoxon paired tests and Mann–Whitney tests for between-group comparison. Result: The intervention group (n=15) showed a significant reduction in VAS scores from pretest (3.93 ± 1.48) to posttest (p = 0.001). The control group (n=15) also showed a more minor but significant reduction in VAS from 4.46 ± 1.06 (p = 0.025). The between-group comparison revealed a significant difference in posttest VAS values (p = 0.001), demonstrating superior improvement in the intervention group. Participant characteristics, including age, BMI distribution, work duration, and educational background, were comparable between groups. Conclusion: The Three Exercises program significantly reduces pain intensity compared with standard care in online motorcycle taxi drivers with low back pain. Its simple structure and feasibility support its use as an effective therapeutic exercise to improve lumbar comfort and functional capacity.
Co-Authors Aditya Mulyawan Agus Adi Putra Agus Sugiri, Agus Anak Agung Adhi Suryawan Andriana, Laily Mita Ari Dwi Agus Sulistyo Arif Devi Dwipayana Arista Wahyu Ningsih Atmaja, Danuditya Purna Bahrudin, Putri Khaila Chintana Cestya Nurba'id, Anggun Rusfikadewi Dewa Gede Angga Pranaditya Feliatra Gerhanawati, Ifa Hendra Widjaksana I Gusti Bagus Wijaya Kusuma I Gusti Ngurah Bagus Mahendra Putra I Gusti Ngurah Priambadi I Gusti Putu Jaya Nuartha I Kadek Arya Bayu Diloka I Ketut Suanjaya Adi Putra I Made Krisna Dinata I Nengah Suweden I Nyoman Suparta I Nyoman Suparta I P G. Adiatmika I Putu Adiartha Griadhi I Wayan Widhiada I.K.G. Wirawan Ignatius, Gian Roni Kadek Bayu Laksana Ketut Astawa Ketut Budiarta Lailatul, Sevi Luh Putu Ratna Sundari M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Made Suarda Made Sucipta Maria Magdalena Marpaung, Hakim Irwandi Mutmainah, Rosalina Nafilah, Zumrotin Ndayisenga, Japhet Ngurah Putra Wibawa Ningrum, Selfya Nisyak, Hesti Khoirotun Purba, Rismaidah Putra, I Ketut Suanjaya Adi Rakhmawati, Hafizah Sururul Nur Rosanti, Dwike Primadita S.P.G. Gunawan Tisna Saputra, Rizal Ada Si Putu Gede Gunawan Tista SPG Gunawan Tista SPG Gunawan Tista SPG Gunawan Tista, SPG Gunawan Su'udi, Ahmad Suprapta Winaya Susy Purnawati Syamsudin Syamsudin Wayan Nata Septiadi