이 총설에서는 해양 연체동물 내 독소 분석을 하는 연구자들의 이해를 돕기 위하여, 국내에서 생산되거나 유통 되는 수산물 중 해양 생물독소에 오염될 수 있는 이매패류와 복족류 종들의 공식 명칭과 생태학적 특성을 소개하 였다. 또한 대표적인 생물군의 해부도를 통한 각 기관들의 위치와 공식적인 명칭을 알리고자 하였다. 향후 해양 생물독소 분석 관련 식품공전, 학술논문 및 보고서에 실험생물의 정확한 종명과 분석 기관의 명칭에 대한 통일 및 규격화가 필요하다.

이 논문의 목적은 2020년 11월에 타결된 역내포괄적경제동반자협정 (RCEP)에 한국, 중국, 일본이 참여한 각각의 요인들과 인도가 가입하지 않은 요인들을 구체적으로 분석하여 국제레짐이론의 시각에서 설명하는 것이다. 첫째, 한국이 가입한 주요 요인은 신자유주의 이론의 설명대로 교역의 확대를 통한 경제적 이득을 예상했기 때문이다. 또한 신현실주의 이론에서 예상하듯이 아세안과의 포괄적 협력을 강화하여 역내에서 한국의 상대적 지위와 영향력을 높이려는 의도에서 비롯되었다. 둘째, 중국이 RCEP에 가입한 주요 요인도 경제적 이득인데 이는 신자유주의 이론의 설명과 부합된다. 또한 신현실주의 이론에서 예상하듯이 중국은 역내에서 주도적으로 다자적 통상협력의 틀을 구축함으로써 기존의 지위와 영향력을 증대하려는 것이다. 셋째, 일본도 신자유주의 이론이 예상하듯이 주로 경제적 이득을 고려하여 RCEP에 가입하였다. 또한 RCEP을 통해 수준 높은 다자적 자유무역 질서를 확립하는데 리더십을 발휘하기 위함이다. 이러한 요인은 신현실주의 이론으로 설명된다. 반면에 인도가 RCEP에 가입하지 않은 주요인은 중국에 대한 상대적인 경제적 손실이 예상되어 자국의 상대적 지위와 영향력이 저하될 것을 우려하였기 때문인데 이러한 요인은 신현실주의 이론에 의해서 적절히 설명된다.

본 연구는 플라스틱 재료를 사용한 유공관 암거의 품질성능시험을 통해 간척지 농지 범용화에 적용가능 여부를 판단하였다. 직경 30mm, 50mm, 55mm의 폴리에틸렌 재질의 유공관을 사용하였으며, 품질성능평가 항목은 밀도시험, 인장강도시험, 충격강도시험, 투수시험을 실시하였다. 밀도시험결과는 모든 시험편에서 유공관 품질기준인 밀도 0.94g/㎤이상의 결과를 보였으며, 인장강도 시험은 직경 30mm와 직경 55mm는 24.5MPa이상으로 품질기준을 만족하지만, 직경 50mm 유공관에서 24.4MPa로 품질기준인 24.5MPa에 미흡하므로 보강이 필요한 것으로 나타났다. 충격강도시험은 모든 시험편에서 파괴도 5미만으로 품질기준을 만족하는 결과를 보였으며, 내면에도 이상이 없는 것으로 분석되었다. 투수시험 결과는 모든 시험편에서 품질기준인 0.1㎝/sec 이하를 만족하는 결과를 보였다. 본 연구에 적용한 주름유공관은 간척지 범용농지 에 지하배수암거로 사용이 가능한 것으로 평가되었다. 하지만 제품의 공장생산 시 품질관리가 미흡할 소지가 있으므로 현장반입 전 사전품질 관리가 필요하다고 판단된다.

A mid-story isolation system was proposed for seismic response reduction of high-rise buildings and presented good control performance. Control performance of a mid-story isolation system was enhanced by introducing semi-active control devices into isolation systems. Seismic response reduction capacity of a semi-active mid-story isolation system mainly depends on effect of control algorithm. AI(Artificial Intelligence)-based control algorithm was developed for control of a semi-active mid-story isolation system in this study. For this research, an practical structure of Shiodome Sumitomo building in Japan which has a mid-story isolation system was used as an example structure. An MR (magnetorheological) damper was used to make a semi-active mid-story isolation system in example model. In numerical simulation, seismic response prediction model was generated by one of supervised learning model, i.e. an RNN (Recurrent Neural Network). Deep Q-network (DQN) out of reinforcement learning algorithms was employed to develop control algorithm The numerical simulation results presented that the DQN algorithm can effectively control a semi-active mid-story isolation system resulting in successful reduction of seismic responses.

In this paper, a twisted shape structure with an elevation form favorable to the resistance of vibration caused by wind loads is selected from among the forms of high-rise buildings. The analytical model is a square, triangular, and hexagonal plane with a plane rotation angle of one degree from 0 to 3 degrees per each story. As a result of the analysis, as the twist angle increased, story drift ratio is increased. Responses with different eccentricity rates were shown by analytical models. Therefore planar shapes designed symmetrically to the horizontal axis of X and Y are considered advantageous for eccentricity and torsion deformation. In the case of the bending moment of the column, the response was amplified in the column supporting the base floor, the roof floor, the floor in which the cross-section of the vertical member changes, and the floor having the same number of nodes as the base floor. Finally, the axial force response of the column is determined to be absolutely affected by the gravity load compared to the lateral load.

As the size of market for electric vehicles and energy storage systems grows, the demand for lithium-ion batteries (LIBs) is increasing. Currently, commercial LIBs are fabricated with liquid electrolytes, which have some safety issues such as low chemical stability, which can cause ignition of fire. As a substitute for liquid electrolytes, solid electrolytes are now being extensively studied. However, solid electrolytes have disadvantages of low ionic conductivity and high resistance at interface between electrode and electrolyte. In this study, Li7La3Zr2O12 (LLZO), one of the best ion conducting materials among oxide based solid electrolytes, is fabricated through RF-sputtering and various electrochemical properties are analyzed. Moreover, the electrochemical properties of LLZO are found to significantly improve with co-sputtered Li2O. An all-solid thin film battery is fabricated by introducing a thin film solid electrolyte and an Li4Ti5O12 (LTO) cathode; resulting electrochemical properties are also analyzed. The LLZO/Li2O (60W) sample shows a very good performance in ionic conductivity of 7.3  108 S/cm, with improvement in c-rate and stable cycle performance.

The purpose of this study was to investigate the improvement effect of biomarkers through the supply of natural diet in the juvenile hybrid abalone (Haliotis discus discus♀*H. madaka♂). For the study, the shell length of about 17 mm and the total weight of 0.83 g were used. The feeding conditions were set as the natural diet group (dried laver) and the formulated diet group, and the experiment duration was 16 weeks. The survival rate was about 14% higher in the natural diet group than the formulated diet group, and growth was also faster in the natural diet group. Shell malformation rate was lower in the natural diet group (7.5%) than the formulated diet group (21.5%). In the biochemical composition, except for carbohydrates, both experimental groups showed similar values. The degeneration of epithelial cells in the hepatopancreatic tubule was lower in the natural diet group than the formulated diet group, and the activity of basophilic cell was higher in the natural diet group. These results indicate that it is worth considering the supply of natural diet for the breeding of juvenile hybrid abalone and the improvement of the quality of the formulated diet (H. discus discus♀*H. madaka♂).

이상의 결과를 종합하면, 혼합유산균 2종(Bifidobacterium animalis ssp. Lactis Bf141와 Lactobacillus rhamnosus Lb102)의 섭취는 고지방식이 유도 비만 마우스에서 체중, 체지방, 제지방, 골밀도 등 주요 체성분에 영향을 주지 않았다. 혼합유산균은 식욕 조절 효과를 위해 측정한 사료 섭취량에도 영향을 주지 않았으며, 간 조직 무게에도 영향을 미치지 않았다. 인슐린저항성과 포도당신생합성의 주요 지표인 공복혈당량 또한 혼합유산균 급여에 의해 변화 하지 않았다. 또한 혼합유산균은 심혈관질환의 지표로 사용되는 혈중 중성지방 및 총 콜레스테롤에 영향을 주지 않았으며, 체내 지방의 소화 및 흡수율에서도 영향을 미치지 않았다. 결론적으로, 고지방식이유도 비만 마우스를 이용하여 혼합유산균(Bf141 + Lb102)의 항비만 생리활성 을 검증한 결과, 유의미한 물리적, 대사적 표현형 개선은 검증되지 않았다. 따라서, 추후 개별 보다 다양한 혼합 조건 및 농도로 연구를 설계하여 혼합유산균의 항비만 효과를 검증할 필요성이 있다.

This study aims to understand the opening efficiency of the finless porpoise escape guide net by the type of extension net that is the part to which the escape guide net is attached in stow net. To this end, extension nets were manufactured in full size and the net mouth area and towing tension were investigated according to the towing speed (0.2, 0.4, 0.6 and 0.8 m/s) and the type of extension net (25 mm net and raschel net) in the water tank. As a result, the net mouth area of the guide net was larger when the raschel net was used for the extension net than when the 25 mm net was used under all towing speeds. In addition, regardless of the type of extension net, the net mouth area reached about 80% of the maximum value at a towing speed of 0.4 m/s. In the field, fishing operation of stow net is performed only when the current speed is above 0.4 m/s. Therefore, the speed of 0.4 m/s was confirmed as a meaningful value to determine whether it is possible to operate. As a result of analyzing the relationship between the net mouth area of the guide net and the towing tension, it was confirmed that the difference in the net mouth area of the guide net according to the type of the extension net was due to the difference in the solidity ratio.

Purpose: The purpose of this study is to understand the general nurses's experiences of missing patient identification. Methods: Participants were 12 nurses who experienced missing patient identification in general wards in hospitals. Data were collected with focus group interviews and individual in-depth interviews and data were analyzed using qualitative content analysis. Results: As the results of this study, 128 statements, 4 themes and 13 sub-themes were derived. The four themes derived were ‘Situations that we had not to check patient identification properly’, ‘Fear and pressure from the result of missing patient identification’, ‘Feeling guilty to the results of missing patient identification’and ‘Efforts to reassuring patient identification’. Conclusion: In order to prevent the failure of patient identification, we need specialized programs to cultivate patient safety culture not only for nurses, also patients and caregivers, and all departments of hospital. We also need institutional efforts and effective hospital investment and supports for accomplishing the goal.