Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
High-frequency ultrasonic transducer has been used in an underwater non-destructive application, underwater acoustic imaging, and high-frequency sonar. Normally, all these applications need a high-resolution transducer. For this reason, the transducer must be a high-resolution transducer subsequently, the transducer must be a good receiving sensitivity and wide bandwidth. In this paper, a flexible piezoelectric ultrasonic transducer (FPUT) was designed and characterized in an open-circuit receiving response for underwater application. The target operating frequency is a high-frequency ultrasonic range between 25 kHz to 1.5 MHz for an acoustic transducer. Polyimide is used as a flexible substrate for the cover layer and the flexible circuit. The electrodes for positive potential and ground were designed in a lateral structure whereby this design can improve the receiving sensitivity. A Polyvinylidene fluoride (PVDF) film was functioning as a sensing element and placed on the top of an electrode. A polyimide layer is used as it is a semipermeable membrane manufactured principally for use in water purification or water desalination systems. A 3M tape was used as a matching layer interface between water and PVDF. The air backing was used as a signal absorber to expand the frequency bandwidth. The pulse-echo method is used to characterize the sensitivity of ultrasonic transducer in underwater. The receiving sensitivity and frequency bandwidth are two important parameters to describe the electro-acoustic energy conversion efficiency of an ultrasonic transducer. An FPUT has a receiving sensitivity of -25.1827 dB rel 1 V/µPa dB with a resonance frequency of 425 kHz. The frequency bandwidth of this FPUT is 61.2%. This can conclude that a FPUT with air backing is capable to be a high receiving sensitivity ultrasonic transducer and wide frequency bandwidth for high-frequency ultrasonic applications
Recent studies suggest a potential relationship between intellectual capital, dynamic capabilities, and innovation performance in achieving a successful business. The contribution of dynamic capabilities to innovation performance remains unclear and at the center of the debate. Based on a systematic literature review, the purpose of this research is to develop a tool for measuring the relationship between intellectual capital and dynamic capability toward better innovation performance. Relatively, the research instrument was a questionnaire of 48 questions classified according to the study variables. The distributed samples of the questionnaire were 55, whereas 44 samples returned for analysis in comparison to Cronbach's Alpha. The study found that the instrument designed to measure intellectual capital has shown a positive outcome. Based on the scores aforementioned, the instrument of this study has shown high levels of reliability. Most of the measurements demonstrate that the existence of a high tendency for the usability of dynamic capabilities in enhancing intellectual capital for better innovative performance. Lastly, the most promising approach seems to be indirect, as it appears that dynamic capabilities primarily cause change and intermediate outcomes, though far from being the most hypothesises relationship
