http://repository.president.ac.id/xmlui/handle/123456789/13869 Sat, 13 Jun 2026 19:00:33 GMT 2026-06-13T19:00:33Z http://repository.president.ac.id/xmlui/handle/123456789/13884 DEVELOPMENT AND VALIDATION OF THERMOCOUPLE FOR THERMODYNAMICS EXPERIMENT Anggraini, Lydia; Hernawan, Rendi Undergraduate students often struggle with Thermodynamics due to a lack of hands-on experience with the devices and sensors discussed in coursework. Traditional experimental setups—such as engine test benches and HVAC systems—are prohibitively expensive and maintenance-intensive, limiting student access and requiring large group work that can reduce individual engagement. To address this issue, we developed and implemented a costeffective thermocouple calibration apparatus for use in undergraduate Thermodynamics laboratories. The equipment utilizes affordable, readily available components, enabling the creation of multiple identical setups within a constrained budget. This allows students to work in smaller groups, increasing interaction and individual learning opportunities. The apparatus supports instruction in key Thermodynamics concepts, including temperature measurement, sensible and latent heat, and the Seebeck effect. Results from implementation show improved student comprehension and engagement. This approach offers a scalable, practical solution for enhancing Thermodynamics education, with potential applications across engineering curricula seeking to improve experiential learning within limited resources. Wed, 01 Jan 2025 00:00:00 GMT http://repository.president.ac.id/xmlui/handle/123456789/13884 2025-01-01T00:00:00Z http://repository.president.ac.id/xmlui/handle/123456789/13871 NON-DESTRUCTIVE TESTING OF HYDRAULIC CYLINDER EXCAVATOR BUCKET AND FAILURE ANALYSIS Sudania, Muhammad; Anggraini, Lydia; Hussain, Waqar The bucket cylinder is one of the important components in the front attachment of the excavator. The component is combined with a hose that flows the hydraulic oil flow from the hydraulic pump, and control valve to the bucket cylinder, which moves the bucket on the excavator. If the bucket cylinder does not work according to standards, a malfunction will occur which causes problems with the excavator so that damage occurs to the inner parts components. The research method used is an observation of the damaged bucket cylinder components, after observing the bucket cylinder check, interviewing the excavator operator, and checking using a dye penetrant, the bucket disassembly process is carried out to determine the condition of the bucket cylinder components to make it easier to observe the damage that occurs to the bucket cylinder, then the bucket cylinder component disassembly process is carried out then the inspection process is carried out using dye penetrant and hydraulic oil sampling to make it easier to collect data on the damage that occurs to the bucket cylinder components after the inspection of the damaged parts is carried out, repairs and replacement of spare parts with new ones so that the bucket cylinder can be reused. Wed, 01 Jan 2025 00:00:00 GMT http://repository.president.ac.id/xmlui/handle/123456789/13871 2025-01-01T00:00:00Z