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All Journal Journal of Education, Humaniora and Social Sciences (JEHSS) JURNAL CRANKSHAFT
Catur Setyawan Kusumohadi
Universitas Negeri Jakarta
Control & Systems Engineering Energy Engineering Health Professions Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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Mengembangkan Media Pembelajaran: Analisis Kebutuhan Pada Materi Exterior Light System Gofani Fajri; Priyono Priyono; Catur Setyawan Kusumohadi
Journal of Education, Humaniora and Social Sciences (JEHSS) Vol 4, No 1 (2021): Journal of Education, Humaniora and Social Sciences (JEHSS), August
Publisher : Mahesa Research Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.784 KB) | DOI: 10.34007/jehss.v4i1.652

Abstract

This research and development aim to present the results of the analysis of the need for media development for learning in vocational schools on exterior lights system materials. In this research, the needs analysis has referred to: (1) vocational schools are obliged to prepare students with relevant competencies to fill the needs of prospective workers in the world of work or industry; (2) The new world of work demands a higher level of thinking and skills (3) The problem of learning exterior lights system materials that are theoretical; (4) Media required in the practice of exterior lights system. This research uses a series of unstructured observation methods, open question questionnaires, as well as unstructured interviews in gathering information in the field. The result of this study is: (1) Unstructured observation results are the discovery of the problem that 70% of the daily test results of exterior lights system materials of grade XI Electrical Avionic students under the minimum completion criteria (below the grade of 75). (2) The results of the open question questionnaire are the majority of students (96%) students need practice through learning media so that learning outcomes can be improved so as to achieve minimum completion criteria. (3) The results of unstructured interviews to subject teachers are in line with the results of the questionnaire i.e. teachers are still teaching with powerpoint media and lecture methods because there is no learning medium for practical students. The conclusion of this study is that students and teachers need media for practical activities. Therefore, this research and development was conducted to research and develop the media practice material exterior lights system.
Analisis Redaman Sistem Vibrasi Paksa Satu Derajat Kebebasan Pada Simple Vibration Apparatus Dibyo Setiawan; Zainiddin Zainuddin; Ibnu Annas Thoyib; Ahmad Kholil; Catur Setyawan Kusumohadi
JURNAL CRANKSHAFT Vol 7, No 2 (2024): Jurnal Crankshaft Vol.7 No.2 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v7i2.12447

Abstract

Vibration testing in the field of mechanical engineering has an important role in planning and maintaining machines to determine whether the design is safe and suitable for application. Newton's second law is a reference for back-and-forth movement around equilibrium both within the system and from outside the system which affects the machine itself, if the frequency of stimulation is equal to one of the system's natural frequencies, then resonance occurs, and dangerously large oscillations, resonance can cause damage to the system. The solution to avoid excessive resonance requires a damper. Forced vibration oscillations are applied by excitation using an unbalanced mass installed on a DC motor unit, the response is a mass deviation to obtain oscillations or time relationships with amplitude, the natural frequency of the system, mass-spring deviation, and characteristics of vibration. This activity aims to analyze the effect of the vibration amplitude of a forced vibration simulator under conditions without damping and using damping. The experimental test method was applied to a forced vibration system with one degree of freedom with an oil and air damper in a simple vibration apparatus simulator, 2 types of unbalanced masses, regulated by rotation up to 500rpm, tested under conditions without a damper, using an oil and air damper. The results of the activity showed that the air-dampening media can limit greater amplitude compared to the oil-dampening media.
Co-Authors Ahmad Kholil Dibyo Setiawan Gofani Fajri Ibnu Annas Thoyib Priyono Priyono Zainiddin Zainuddin