Currently, FBG sensor has been developed in many applications due to its wavelength is sensitive to pressure change. This study aims to analyze the FBG wavelength shifting due to an applied load. In this research, the FBG was placed transversely right in the middle of the specimen that was made by using silicon rubber with thicknesses of 7 mm and 14 mm. The FBG wavelength in the two specimens was investigated by an interrogator when the load is put on to the specimens in three variations: without load, 5 kg, and 10 kg. The result show that the shift of FBG wavelength in specimen with the same thickness is proportional to load increasing. Furthermore, the test specimen with a thickness of 7 mm is more sensitive than 14 mm. Accordingly, the specimen with a thickness of 7 mm is a good option to be used as a weight measurement system.
This study aims to determine whether there are variables that affect the performance of Apron Movement Control (AMC) officers in increasing FOD monitoring at the Air Side of Adi Soemarmo International Airport, Solo. It used quantitative method. According to the research findings, the regression coefficient value of the AMC officer's performance variable is 0.735, which means that the influence of AMC officer's performance in increasing FOD supervision is positive. A significance value of 0.000 <0.0 5 which indicates that the performance of AMC officers has a significant influence on improving FOD supervision. The coefficient of determination is 98.2% and the remaining 1.8% is influenced by variables outside the research. Hypothesis testing shows that the performance factors of AMC officers influence the growth of FOD monitoring at the Air Side of Adi Soemarmo Airport, Solo. This was reinforced by the majority of respondents expressing their agreement, especially with regard to the knowledge possessed by AMC officers regarding good work and providing good work results.
Requirements for high service life and mechanical strength of components undergoing cyclic deformation and abrasive resistant, identification of quantitative relationships between material properties and its microstructure very important. In the previous study, Hardness and toughness properties are usually obtained by combining quenching and tempering. The other studies, to increase the hardness by adding Cr on the material. The application of heat treatment in austenizing can provide a microstructure change with refining carbides. In this study, 2.085Cr 2.418Ni low carbon steel casting were heat treated with a reheated in various temperature without quenching. The changes in the microstructure in the last step after passing through the temperature experienced respectively 750 ° C, 650 ° C and 350 ° C were very significant. The phase that appears is tempered martensit surrounding refinement fine tempered martensite and decreasing hardness from 496 HvN to 257 HvN.
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