본 연구에서는 높은 이산화탄소 투과성과 선택성을 가지는 미세다공성 고분자 PIM-1을 합성하고, 나노미터 수준 에서 두께를 정밀하게 조절할 수 있는 water casting 기법을 적용하여 박막복합막을 제조하였다. 제조된 분리막의 성능을 평 가하기 위해 FTIR-ATR, BET, GPC, XRD, TEM-EDS 등의 분석을 수행하였으며, 기체 투과 시험을 통해 CO2/N2 선택성과 투과도를 측정하였다. 연구 결과, 본 연구에서 제조된 박막복합막은 2700 GPU 이상의 CO2 투과도와 약 25의 CO2/N2 선택도 를 나타내며, 기존의 PIM-1 기반 분리막보다 우수한 성능을 보였다. 이를 통해 water casting 기법을 이용한 PIM-1 기반 분리 막이 경제적이고 효율적인 이산화탄소 분리 기술로 활용될 가능성을 제시하였다.

The long-tailed goral (Naemorhedus caudatus) is classified as an endangered species in South Korea due to population declines driven by human development and habitat fragmentation. This study aimed to investigate genetic characteristics and microsatellite genotypes in long-tailed goral populations using fecal samples collected from Uljin and Samcheok regions, which are geographically important habitats for the distribution and dispersal of this species in South Korea. The mean expected heterozygosity (HE) and observed heterozygosity (HO) across 10 microsatellite loci were 0.600 and 0.461 for the Uljin population and 0.644 and 0.571 for the Samcheok population, respectively. These values indicate a moderate level of genetic diversity compared to other closely related species. Genetic differentiation between the two populations had a low level, while a moderate gene flow was observed. The genetic evidence obtained in this study suggests that these two populations share a similar genetic pool, resulting in a low level of genetic differentiation between them. Therefore, they should be considered as one continuous population. Results of this study provide fundamental data and valuable genetic insights for long-term management of the long-tailed goral population in Uljin and Samcheok regions.

Peppers belong to the Solanaceae family and are highly valued worldwide for their flavor, nutritional content, and economic benefits. They contain various antioxidant compounds and vitamins associated with numerous health advantages, such as boosting metabolism and reducing inflammation. In addition, peppers are an important agricultural crop, contributing significantly to income along their value chain and serving as an indispensable ingredient in many dishes. However, domestic pepper production has steadily declined, mainly due to increased production costs. Peppers require a significant amount of labor during the harvest season, leading to high labor expenses. As a result, mechanized harvesting is emerging as a potential solution to address this issue. Research on mechanical harvesting of peppers has focused on developing harvesting machines, breeding suitable varieties, and exploring innovative cultivation methods appropriate for mechanization. Although similar research has been conducted in Korea, significant results have yet to be achieved. This review summarizes cases of mechanical pepper harvesting and outlines the traits and cultivation methods required for its effective implementation. For successful mechanical harvesting, the ideal cultivar should be suitable for once-over harvesting, with characteristics such as simultaneous and uniform ripening, low plant height, narrow branching angles, resistance to lodging, and ease of pedicel detachment from the stem. Moreover, fundamental research is essential for developing cultivation methods that do not rely on stacking and for determining optimal planting distances.

With intensifying anthropogenic stress, incidences of extreme bioturbation have increased throughout coastal vegetation ecosystems worldwide. However, ecosystem consequences of extreme bioturbation within coastal vegetations remain poorly understood. Burrowing shrimps (infraorders Gebiidea and Axiidea) are pervasive bioturbators in seagrass ecosystems, spanning temperate to tropical regions. To date, empirical investigations about their effects on seagrass ecosystem properties are few and sparse. We conducted a series of field surveys and experiments in Geoje, South Korea to assess 1) whether burrowing shrimp Upogebia major could serve as an important bioturbating agents in intertidal seagrass Zostera japonica, 2) the relationship between bioturbation intensity and seagrass vegetation characteristics, and 3) effects of extreme shrimp bioturbation on the persistence of transplanted seagrass. Z. japonica served as an important habitat for U. major, with an average of 102 burrows m-2 found inside the vegetation compared to 266 burrows m-2 in adjacent mudflats. Increasing burrow density was associated with declining seagrass % cover, belowground biomass, and shoot density, particularly during the fall season when shrimp bioturbation activity peaked. No vegetation occurred in areas with >280 burrows m-2, suggesting a potential density threshold for seagrassshrimp co-existence. When Z. japonica was transplanted into low (~16 m-2), high (~277 m-2), and extreme high (~634 m-2) burrow-density areas, the latter two groups showed significantly faster vegetation losses. Overall, these findings suggest that: 1) U. major might serve as an important bioturbating agent in intertidal seagrass habitats across the southern coast of Korea, and 2) this species might pose a threat to seagrass resilience at high population densities.

개의 생애 단계에 따른 영양소 이용성을 이해하는 것은 건강, 발달, 그리고 수명 증진을 위해 중요하다. 특히 자견 시기에는 생리적으로 요구되는 영양소의 결핍이나 과잉 없이 최적의 영양 균형을 유지하는 것이 중요하며, 이 시기의 영양 불균형은 장기적으로 개의 건강에 부정적인 영향을 미칠 수 있다. 이유 후 초기 급성장 단계(12~24주령)의 자견과 성견의 소화율에 대한 연구는 많이 수행되었으나, 자견 성장 후기 단계의 소화율에 초점을 맞춘 연구는 제한적이다. 따라서 본 연구는 비글의 성장 후기 단계를 대표하는 30주령과 42주령에서 주요 영양소와 아미노산의 외관상전장소 화율(apparent total tract digestibility, ATTD)을 비교하였다. 비글 8마리를 대상으로 AAFCO에서 제시한 영양소 요구량을 충족하도록 설계된 사료를 통제된 환경에서 2주간 급여하였으며, 전분채취법을 이용하여 소화율을 평가하였다. 성장률(GR)은 30주에 비해 42주령에서 유의미하게 감소하여 체중 증가 속도가 둔화되는 경향이 확인되었다. 주요 영양소 소화율 분석 결과, 조지방 소화율은 30주령에서 99.01 ± 0.10%에서 42주령에서 97.62 ± 0.15%로 통계적으로 유의미하게 감소하였다(p < 0.001). 또한, 건물 소화율 또한 조지방 소화율과 함께 주령 증가에 따라 유의미하게 감소하는 결과를 보였다(p < 0.05). 반면, 히스티딘 소화율은 30주령의 93.55 ± 0.46%에서 42주령의 94.83 ± 0.24%로, 라이신 소화율은 94.60 ± 0.24%에서 95.19 ± 0.19%로, 아르기닌 소화율은 95.78 ± 0.30%에서 96.43 ± 0.21%로 증가하였다(p < 0.05). 본 연구는 비글의 성장 후기 단계에서 성장률과 조지방 흡수가 감소한 반면, 특정 아미노산의 소화율이 개선되었음을 보여준다. 이러한 결과는 비글의 성장 후기 단계에서도 영양소 이용성이 변화할 수 있음을 시사하며, 성장 단계에 따라 정밀한 영양 관리의 중요성을 강조한다.

This study was conducted to evaluate the germination rate, chemical composition, and in vitro digestibility of sprouted barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.) sprouts depending on cultivar and growth duration. Four cultivars Keunalbori1ho, Saekeumkang, Arijinheuk, and Jokyoung were tested under hydroponic and nutrient solution conditions. The germination rate was significantly higher under hydroponic conditions compared to nutrient solution treatment. Sprouts were harvested at 0, 4, 6, and 8 days for subsequent analysis. Chemical compositions, such as dry matter (DM), crude protein (CP), ether extract (EE), and crude ash (CA), were analyzed following AOAC (2005) protocols, while neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents were determined according to the method of Van Soest et al. (1991). In vitro digestibility was assessed by incubating ground samples with rumen buffer in DaisyII incubators for 48 h. At day 6 of growth, Keunalbori1ho showed the highest NDF and ADF concentrations (48.6% and 26.2%), reflecting its high structural fiber and the lowest digestibility (IVDMD 52.2%, IVNDFD 37.2%). However, it maintained consistent nutritional characteristics across all growth stages, suggesting potential as a stable forage source. In contrast, Saekeumkang exhibited the highest IVNDFD (59.1%) along with relatively low NDF (30.5%) and ADF (16.7%) values (p<0.05), indicating superior digestibility likely attributed to a simpler cell wall structure and higher NFC availability. Notably, digestibility sharply declined by day 8, implying that the optimal harvest window lies around day 6. Therefore, this study suggests that the cultivars Keunalbori1ho and Saekeumkang possess complementary strengths in terms of chemical composition and digestibility, underscoring the importance of optimizing cultivar selection and harvest timing to enhance the potential of cereal sprouts as high quality forage.

Purpose: This study aimed to evaluate the effects of simulation education in patient safety nursing on nursing students’ attitudes toward patient safety, confidence in patient safety, academic self-efficacy, and academic engagement. Methods: The study was conducted from April to May 2022 with 69 nursing students enrolled in a fundamental nursing practice course. Two simulation scenarios were developed to enhance the patient safety competencies. Each scenario was implemented in two sessions, each lasting 90 minutes. Data were collected using self-report questionnaires, which measured attitudes toward patient safety, confidence in patient safety, academic self-efficacy, and academic engagement before and after the simulation education. Data were analyzed by employing descriptive statistics and paired t-tests using SPSS Statistics Version 26.0. Results: After participating in the simulation program, students showed statistically significant improvements in their attitudes toward patient safety (t=9.11, p<.001), confidence in patient safety (t=15.66, p<.001), academic self-efficacy (t=6.03, p<.001), and academic engagement (t=9.28, p<.001). Conclusion: The findings suggest that simulation education in patient safety nursing is an effective nursing education strategy. The study highlights the need to develop and expand diverse simulation-based learning programs in nursing education.

The purpose of this study, when predicting acute oral toxicity using QSAR software, the reliability of the predicted values was studied according to a single functional group or multiple functional groups within a single chemical. Acute oral toxicity is predicted using EPA T.E.S.T S/W for chemicals registered in ChemIDplus. The effect of a combination of specific functional periods on the degree of consistency of predicted values was studied. When some specific functional groups (combinations) exist, it was confirmed that the experimental and predicted values were high and low. It was confirmed that the prediction accuracy was high when the Anion group and the Halogen group were together, and the perdiction accuracy was significantly low when the Nitrile group was present. As a result of accumulating such data and showing reliability in predicting acute oral toxicity with EPA T.E.S.T S/W for 10 SVHC substances without experimental values, the matching rate was derived from at least 0% to 73.33%. It was confirmed that there was some tendency of the QSAR prediction value according to the combination of specific complex functional groups. When 10 SVHC substances without experimental data were predicted to be toxic through T.E.S.T S/W by quantitatively databaseizing the above tendency, 0~73.33% of the results were derived as a result of showing the realiability of the program prediction

원전에서 발생 가능한 중대사고 중 하나인 용융 노심-콘크리트 상호작용(Molten Core Concrete Interaction, MCCI)은 노심의 용융물이 격납용기 하부의 콘크리트를 침투하면서 콘크리트의 물리적 및 화학적 분해를 유도하고, 이로 인해 구조적 손상이 발생하게 된다. 더불어, 분해 과정에서 발생하는 비응축성 가스와 수증기로 인해 내부압력이 급격히 상승할 수 있다. 본 연구는 MCCI 가 발생하는 상황에서 원전 프리스트레스트 콘크리트 격납용기(Prestressed Concrete Containment Vessel, PCCV)의 내부압력 저 항능력을 평가하는 것을 목적으로 한다. 이를 위해 APR1400을 대상으로 MELCOR 코드 기반의 사고 시나리오를 통해 압력 및 온도 상승을 모사하였으며, 검증된 유한요소 해석모델을 이용해 구조응답을 분석하였다. 내부압력 저항능력은 글로벌 후프 변형률(global hoop strain)과 등가소성변형률(equivalent plastic strain) 두 가지 한계상태 기준에 따라 비교 분석하였다.

본 연구는 여대생의 거부민감성이 우울에 미치는 영향을 알아보고 정 서조절이 완충 역할을 수행하는지 확인하기 위해 정서조절의 하위요인 (능동 전략, 지지추구 전략, 회피분산 전략)을 세분화하여 검증하였다. 이 를 위해 2025년 1월 9일부터 30일까지 설문조사를 실시하여 총 275부 를 최종 분석에 사용하였다. 주요 연구결과는 다음과 같다. 첫째, 거부민 감성은 우울에 정적 상관을 보였고, 정서조절의 능동 전략과 지지추구 전략은 우울에 부적 상관을, 회피분산 전략은 정적 상관을 보였다. 둘째, 능동 전략과 지지추구 전략은 유의한 조절효과를 보였으나, 회피분산 전 략은 조절효과가 유의하지 않았다. 이러한 결과는 여대생의 거부민감성 이 우울로 이어지는 과정에 있어 능동 전략과 지지추구 전략이 심리적 완충 역할을 하는 데 효과적임을 확인하였고, 우울 완화를 위한 실천적 방향을 제시함으로써 연구의 의의를 둔다.

This study was attempted to solve the problem that the current training is not consistent with the actual working environment of the fishing vessel, even though the advanced fire extinguishing training for international fishing vessels is mandatory. As a result of the survey, the lack of timely use of fire extinguishing equipment and the difficulty of organizing the fire extinguishing organization were found, and the main problems were analyzed as low understanding of fixed fire extinguishing facilities, low awareness of fire-related laws and regulations, and inefficiency of fire extinguishing training. It was found that the current Seafarers Act does not clearly define the roles and responsibilities of advanced fire extinguishers, and lacks specific standards for designated educational institutions, so there is a problem that the accuracy and reliability of the training contents with the STCW-F Convention and STCW Convention are inconsistent. In addition, it has been confirmed that the fire extinguishing organization, internal communication, and fire extinguishing training in ships, as stipulated in international agreements, are not properly reflected in the domestic curriculum. In particular, the current training consists of general contents that do not take into account the characteristics of fishing vessels, so there is a lack of practical emergency response fire extinguishing training manuals. Therefore, this study proposes the development of customized training content for fishing vessels considering the special working environment and risk factors of fishing vessels based on international agreements, and emphasizes the need for policy support, such as strengthening participation of fishing vessels in education and training, and establishing a legal basis for the operation of emergency fire extinguishing organizations.