Recently, as the global problem of marine debris and marine plastics is getting serious, various ways to solve them have been proposed, and the use of the biodegradable fishing gear is proposed as an alternative. Currently, 13 types of biodegradable fishing gears are available, but their penetration rate is only 8.7%. However, the need for the use of the biodegradable fishing gear is growing as awareness of protecting marine ecosystems is growing. Therefore, in this study, the economic effects of the expansion of biodegradable fishing gear distribution in Korea's coastal areas were analyzed through the conservation of marine ecosystems, augmentation of fisheries resources, and augmentation of fishing efficiency. According to the analysis, the economic effects of 52,795 million won, 105,590 million won, and 158,385 million won was generated as the distribution of biodegradable fishing gear were expanded to 10%, 20% and 30% across all gill net and trap.

We collected AIS information on fishing vessels operating near Jeju Island, and analyzed appearance density of the Chinese fishing vessels and inferred the movements of the fishing grounds. AIS information was received from October 16, 2016 to October 16, 2017 and stored on a hard disk through a program called AisDecoder. Unauthorized fishing vessels within the Exclusive Fisheries Agreement Zone (EFAZ) operated near the EFAZ boundary, and the frequency of appearance of fishing vessels were high in the middle waters of Korea and Japan, 252 and 250 fishing zones. Chinese fishing vessels authorized to enter appeared scattered outside the Prohibiting Fishing Zone of the Large Trawlers (PFZLT), and the closer they were to the PFZLT boundary, the higher the appearance density. And the appearance of Chinese fishing vessels with a speed from 0 to 3 knots was mostly outside the EFAZ, showing high density in the waters close to the boundary between Korea and Japan. On the other hand, within the EFAZ, the frequency of appearance of Chinese fishing vessels was also low and scattered. The appearance of Chinese fishing vessels with a speed from 3 to 5 knots mostly shows some variability within the EFAZ, but the frequency of appearance was high and the density was high. The seasonal appearance of Chinese fishing vessels in the waters south of Jeju Island appeared in the southwest in the autumn and then moved south and southeast of Jeju Island in the winter, and in the spring and summer. They were considered going to other fishing grounds without fishing in the waters south of Jeju Island.

We performed seismic noise level analysis to access the proper functioning of 11 newly established seismic stations in the southeastern region of Korea. One-hour long segments of seismograms were selected from the continuous data of the 3 elements for 61 days from March 1, 2019. For each segment of data, the power spectral density (PSD) was estimated from the continuous back ground noise data of the 3 elements for periods ranging from 0.02~100 s. The median noise levels (NLs) of the stations were compared with the new noise model (NNM) of USGS and NLs of station TJN installed in a tunnel on a granite basement. We observed that the NLs of the newly installed seismometers were between the upper and lower limit of the NNM. In a comparison with the noise level of station TJN, the new seismometers had their own noteworthy features. The NLs from accelerometers (Epi-sensors) were ~ 40 dB higher than the NLs from velocimeters (STS-sensors) for periods > 10 s, which is because the small and light Epi-sensors are sensitive to environmental changes. Daily and weekly variations in spectral noise level were observed clearly in short periods < 1 s, and these are considered to be related to human activities. The seismometers in boreholes showed ~20 dB weaker NLs in the cultural noise band. The NLs of accelerometers at a depth of 30 m were also much lower by 30 dB for long periods > 10 sec. Overall the functioning of the new velocimeter and accelerometer stations was reliable for periods ranging from 0.02~100 s and 0.02~10 s, respectively.

The tendency to use a probabilistic design method rather than a deterministic design method for the design of nuclear power plants (NPPs) will increase because their safety should be considered and strictly controlled in relation to various causes of damage. The distance between a seismically isolated NPP structure and a moat wall is called the clearance to stop. The clearance to stop is obtained from the 90th percentile displacement response of a seismically isolated NPP subject to a beyond design basis earthquake (BDBE) in the probabilistic design method. The purpose of this study is to analyze the effects of heating and buckling effects on the 90th percentile displacement response of a lead-rubber bearing (LRB) subject to a BDBE. The analysis results show that considering the heating and buckling effects to estimate the clearance to stop is conservative in the evaluation of the 90th percentile displacement response. If these two effects are not taken into account in the calculation of the clearance to stop, the underestimation of the clearance to stop causes unexpected damage because of an increase in the collision probability between the moat wall and the seismically isolated NPP.

This study was carried out to produce stable evening primrose oil in water emulsion by using various emulsifier with HLB (8.6, 12, 16.7), concentration (0-45%) and emulsification methods such as high-speed emulsification (7,000 rpm, 2 min) and high-pressure homogenization (10,000 psi, 1 cycle). And then properties of evening primrose oil in water emulsion was evaluated with keeping at room temperature and 40oC during 28 days. Lower HLB 8.6 and high viscosity emulsifier added emulsions were not appropriate for high-pressure homogenization and were separated in a day. The optimum emulsification condition was HLB 12 and high-pressure homogenization (10,000 psi, 1 cycle) for evening primrose oil in water emulsion. These emulsions produced by optimum condition were not separated with the aqueous phase and the oil phase and they were nano-sized around 200 nm, higher zeta-potential (±mV), mono-polydispersed (<0.3), and less oxidized (<0.4) during 28 days.

본 연구에서는 사회적 도전과제 해결을 임무로 설정하여 이론과 정책을 개발 하고 있는 임무지향적 혁신정책론의 관점에서 사회문제 해결형 연구개발정책을 점검하고 그 시사점을 살펴본다. 이를 위해 시민사회의 참여, 정부의 동태적 능력의 확보, 선도적 투자와 후속 투자의 유도의 측면에서 ‘제2차 과학기술기반 사회문제 해결 종합계획’을 분석했다. 이 계획은 사회문제 해결형 혁신을 위한 시민참여의 제도화, 정부의 조정·통합능력 강화와 새로 운 생태계 형성을 위한 제도들을 도입하고 있다. 그러나 기존 활동의 경로의존성이 있기 때 문에 이를 넘어서기 위한 구체적인 프로그램이 요구되는 상황이다. 또 선도적인 투자를 이끌 어내기 위해서는 커뮤니티 케어, 기후변화 대응과 같은 사회정책 분야의 전략 사업과 혁신정 책을 통합적으로 전개하는 것이 필요하다.

본 연구에서는 반도체 산업에서 기초과학 연구를 통한 흡수역량 개선 및 혁신 기회 포착 향상으로 응용과학 연구가 기술혁신 성과창출에 매개효과를 갖는지 실증 분석하고 자 하였다. 103개 반도체 기업들을 대상으로 분석한 결과 첫째, 응용과학 연구는 기초과학 보다 기술혁신 성과에 더 큰 영향을 미쳤다. 둘째, 응용과학 연구는 기초과학 연구와 기술혁신 성과 간에 완전매개효과를 갖는 것으로 나타났다. 셋째, 고성과 기업은 기술한계 극복을 위해 기초과학 연구에 적극적으로 나타났다. 본 연구는 기술혁신 창출을 위해 응용과학 연구뿐만 아니라 기초과학 연구가 필요하며, 기업보다 기초과학 연구에 적합한 환경을 갖는 대학 연구 소와의 전략적인 협력관계 구축 및 장기적 관점의 공동 연구의 활성화가 필요함을 제언한다.

본 연구는 특허 인용 정보를 활용하여 국가연구개발사업의 특허를 평가할 수 있는 새로운 방법을 제시하였다. 이를 위해 가장 대표적으로 특허의 가치나 질을 나타내는 특허의 전방인용 수(피인용 수)를 활용하고, 특허 인용 네트워크에서 개별 특허가 얼마나 중 요한 역할을 하고 있는지를 나타내는 네트워크의 중심성 지수를 활용하여 국가연구개발사업 의 특허와 민간부문의 특허를 비교하였다. 분석 결과 국가연구개발사업의 특허는 특허의 특 성과 출원인의 특성, 기술분야의 특성, 연도 효과를 통제하고도 전방인용 수, 연결중심성, 매 개중심성, 페이지 랭크 모두 높은 것으로 나타났다. 즉, 국가연구개발사업의 특허는 민간부문의 특허에 비해 후행기술에 직접 더 많은 영향을 주며, 선행기술과 후행기술을 직접 연결한 다. 또한 국가연구개발사업의 특허는 민간부문의 특허에 비해 기술의 효율적인 발전에 기여 하며, 중요한 기술들을 연결하는 것으로 나타났다.