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자동차용 능동소음제어 시스템 튜닝을 위한 실시간 데이터 관리 도구
심지수(Ji-Su Shim),안정은(Jung-Eun Ahn),김영국(Young-Kuk Kim),김현석(Hyoun-Suk Kim) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11
In order to reduce the weight of vehicles, the use of sound absorption and sound insulation materials has been reduced. As a result, the noise in the vehicle has been increasing. ANC technology is one of the ways to reduce this noise. The ANC technique is a technique for reducing vehicle noise by using the canceling effect of the sound. Real-time data input / output function is needed when applying tuning method of existing ANC system to vehicle. In this paper, we developed a real-time data management tool for automotive ANC system tuning. We developed a GUI for real-time data input / output, which is divided into a part for data input and a part for output. The data input unit receives data on the pre-tuning environment, and the output unit stores and reports result data after tuning. The languages used to implement this program are C++ and Python, and the data management system used to manage the databases used in the program is SQLite. By using this program, input data and output data of tuning tool can be managed in real time, and graph can be generated and stored in Excel using output data.
탄닌산 분해 효소 처리에 따른 감 추출물 유효성분 변화 및 항산화능 활성 분석
조유진 ( Eugene Cho ),오찬진 ( Chan Jin Oh ),조건웅 ( Geon Ung Cho ),김현석 ( Hyun Suk Kim ),홍주희 ( Joo Hee Hong ),박세이 ( Se I Park ),김현우 ( Hyoun Woo Kim ) 조선대학교 공학기술연구원 2020 공학기술논문지 Vol.13 No.3
Persimmons (Diospyros kaki Thub.) are produced mainly in the southern regions by 188,083 tons on an area of 11,132 ha, but only about 50% of the total is processed and consumed. This study attempted to find a way to increase the value of persimmon. Upon the measurement of the antioxidant activity (DPPH) of the persimmon extract at each site, it was found that an antioxidant activity of about 40% was highest in the immature pulp of the hydrothermal and ethanol (EtOH) extracts. As a result of analyzing 14 active ingredients or phenolic compounds by LC/MS/MS, it was discovered that the content of gallic acid was generally high. Therefore, the index component was selected as gallic acid and was referred to in the experiment. Previously, it was reported that when tannin acid was decomposed, the gallic acid content increased. Meanwhile, the gallic acid content increased by 3-4 times, as a result of Tannase treatment, following the change of the active ingredient in the extract. Based on these results, it is believed that developing a product that is utilized as a functional material is possible by increasing the active ingredient through tannic acid decomposition enzyme treatment of persimmon extract.