Vivi Bella Callista

Experience

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  The International Journal of Mechanical Engineering and Sciences (JMES)

  Feb 2022 - Jun 2023

  Proofreader and Translator Assistant

  Proofread and translated 20+ journal papers from Indonesian to English for The International Journal of Mechanical Engineering and Sciences (JMES).

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  Mechanical Engineering Department ITS

  Jul 2022 - Dec 2022

  Research Assistant

  - Conducted research on AB2 metal hydrides for hydrogen storage, analyzing correlations between 13 constituent elements and 4 key properties (unit cell volume, entropy, enthalpy, and equilibrium pressure).- Collected and processed data from 60+ research papers to build a comprehensive dataset.- Applied supervised machine-learning models (k-NN, linear regression, random forest, ridge regression) to predict battery properties based on composition.- Identified that the model accurately predicted unit cell volume but struggled with other properties, providing insights into machine-learning applications for hydrogen storage. Show less

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  PLTA Jelok PT Indonesia Power

  Jul 2022 - Jul 2022

  Engineering Intern

  - Designed a lubricant oil cooler to lower the temperature by 10°C using HTRI Software.- Conducted condition monitoring for vibration and noise on Francis turbines.- Participated in the annual inspection and maintenance of Unit 3 hydroelectric power plant.

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  PT. ITS TEKNO SAINS

  Jan 2023 - Jun 2023

  Engineering Staff

  - Analyzed ANSYS Fluent simulation results to evaluate combustion, sand movement, and fluid flow phenomena.- Identified root causes of technical issues by reviewing academic journals and performing calculations.- Conducted heat and mass transfer analysis on power plant components (high-pressure heater, boiler, cooling tower).- Read technical drawings and designed tube arrangements for high-pressure heaters using AutoCAD.- Projects involved: - 3D CFD Simulation After Additional Wing Wall Anti Erosion Grill and Roof Refractory CFB Boiler#1 PT Asahimas Chemical. - Detailed Engineering Design (DED) for 7 MW High-Pressure Heater at Sumbawa Barat Coal-Fired Power Plant. Show less

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  Wilmar International

  Oct 2023 - Jun 2025

  Reliability Engineer

  - Developed dashboards for maintenance, cost control, and engineering departments, ensuring seamless data integration across SAP Plant Maintenance, Microsoft Excel, and Power BI.- Developed Reliability Block Diagram (RBD) for biodiesel and oil refinery plant.- Implemented automated maintenance planning in SAP PM, enabling the system to generate maintenance orders (MO) based on predefined schedules for Indonesia and Malaysia plants.- Leading collaboration between maintenance and IT, ensuring every business process flow is captured by PM Mobile, which is Wilmar’s maintenance activities management application. Show less