• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.418-419
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• 2022

In this paper, the design of the fusion sensor mechanism was divided into primary and secondary design, and the device design and case design were divided to facilitate the safety of the sensor, sensor coupling, and connection with power.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.198-200
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• 2021

해양산업 전반에 디지털라이제이션이 도입됨에 따라 새로운 기술이 선박, 항만에 가파르게 적용되고 있다. 하지만 현재의 규정 프레임워크는 선원이 중심이 되어 운영되는 선박을 기준으로 구성되어 있어 새로운 기술을 적용하는데 규정적 측면에서 제한 사항이 많다. 새로운 디지털기술을 적용하기 위해 국제해사기구의 해사안전위원회에서는 98차 회의에서 자율운항선박 운항을 위해 규정식별작업(RSE)을 진행하였고 최근 103차 회의에서 작업을 완료하였다. 이 작업을 통해 자율운항선박을 운항하기 위한 주요 이슈를 선별하고 향후 작업에서 논의하기로 하였다. 국제협약을 수용하는 체계를 갖는 우리나라의 해사 관련법은 국제해사기구의 이런 논의는 상당한 영향을 가져올 것으로 예상된다. 따라서 새로운 기술 및 운용 기술을 해사산업에 적용하기 위해서는 우리나라의 해사 관련법을 분석하여 주요 이슈 및 향후 작업계획수립이 요구된다.

• The Journal of Engineering Geology
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• v.19 no.4
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• pp.509-515
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• 2009

Three earthquakes with local magnitude ($M_L$) greater than 3.0 occurred on April 24, June 2 and September 12 in 1999 nearby the Gyeongju area. Redetermined epicenters were located within the radius of 1 km. We carried out waveform inversion analysis to estimate focal mechanism of June 2 event, and P and S wave polarity and their amplitude ratio analysis to estimate focal mechanisms of April 24 and September 12 events. June 2 and September 12 events had similar fault plane solutions each other. The fault plane solution of April 24 event included those of other 2 events, but its distribution range was relatively broad. Focal mechanisms of those events had a strike slip faulting with a small normal component. P-axes of those events were ENE-WSW which were similar to previous studies on the P-axis of the Korean Peninsula. Considering distances between epicenters, similarities of seismic waves and sameness of polarities of seismic data recorded at common seismic stations, these events might occurred at the same fault. The seismic moment of June 2 event was estimated to be $3.9\;{\times}\;10^{14}\;N{\cdot}m$ and this value corresponded to the moment magnitude ($M_W$) 3.7. The moment magnitude estimated by spectral analysis was 3.8, which was similar to that estimated by waveform inversion analysis. The average stress drop was estimated to be 7.5 MPa. Moment magnitudes of April 24 and September 12 events were estimated to be 3.2 and 3.4 by comparing the spectrum of those events recorded at common single seismic station.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.5
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• pp.969-977
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• 2001

The purpose of this study was to investigate disinfection state and effective factors of utensils and equipments used to foodservice of elementary schools in Busan area, The questionnaire which was administered to 160 dietitians was used in this study as a survey method. The results were as follows. The disinfection method of tray was mainly used by electric gas. Table and other products of stainless steel sanitized by sodium hypochlorite and hot water, but above 51% of slicer. grinder and peeler were not sanitized after used. The products of wood and plastic also used mainly sodium hypochlorite and hot water as sanitizers. In disinfection time, knife, wood spoon and plastic products should be sanitized on demand, but 30.9~53.5% of this utensils except rice scoop were sanitized on demand that showed deficiency of cognition for sanitation. The disinfection of most of utensils and equipments was conducted every day, but food case, slicer, peeler, grinder and wood spoon showed lower disinfection frequency than other products, The method of disinfection was related to dietitians age and career number of total serving, duration of foodservice and serving place, The disinfection time was also affected by dietitians age and educational level, and serving place. The disinfection frequency was affected by number of employee, number of total serving and duration of foodservice. Therefore based on the results of this study, it should be given to the microbiological study on disinfection method of utensils such as slicer, grinder, peeler, large spoon, plastic prouducts and the dietitians sanitation training also should be conducted continuously.

• Journal of Food Hygiene and Safety
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• v.36 no.3
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• pp.264-270
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• 2021

In this study we investigated the elution level of lead (Pb), cadmium (Cd), arsenic (As), zinc (Zn), nickel (Ni), antimony (Sb), germanium (Ge), aluminum (Al) and hexavalent chromium (Cr⁶⁺) from 69 home-cooking utensils into a food stimulants. The results of migration testing according to the Korea standards and specifications for utensils, containers and packages showed values the allowable migrantion limits. Al was detected in all 7 utensil materials with the average concentration ranging from 0.002-5.989 mg/L. According to the migration conditions for (180℃, 30 min), the average concentration of Al in paper was 7.2 times higher than 25℃, 10 min (P<0.05). The results of migration testing at 180℃, 30 min were also below the allowable migrantion limits. When comparing with the provisional tolerable weekly intake (PTWI) of Al, the estimated weekly intakes (EWI) accounted for 0.000-0.045% for Al.

• 레미콘
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• no.7 s.60
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• pp.101-109
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• 1999

• JOURNAL OF ELECTRICAL WORLD
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• no.12 s.84
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• pp.42-44
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• 1983

• 산림경영
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• s.73
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• pp.11-17
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• 1992

• 산림경영
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• s.74
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• pp.18-21
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• 1992

• 산림경영
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• s.168
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• pp.3-7
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• 2004