This research focused on the regional and temporal attributes of tuff architecture in Mokpo, spanning the Japanese colonial period and the post-liberation era. It aimed to uncover the distinct regional and temporal features of tuff architecture by integrating concepts from vernacular architecture and regionalism, framed through a lens of critical regionalism. The study traced the historical progression of tuff architecture in Mokpo within this context. A significant part of the research was an in-depth analysis of four constructions by Son Yang-dong, a renowned technician in post-liberation Mokpo, to closely examine the contemporary relevance and regional significance of his work. Tuff, as an indigenous material, distinctly articulates the local architectural character. In line with regional properties of tuff, the material has adeptly responded to contemporary construction needs. This has laid a foundation for the development of innovative building designs and techniques. Tuff architecture is particularly noted for its exhibition of raw material textures, offering a unique aesthetic that diverges from classical Western architectural styles. Importantly, through the examination of Son Yang-dong's contributions, the study highlights the role of Korean builders in an industry dominated by Japanese influences during the colonial period, underscoring a strong regional identity. As a representation of Mokpo, tuff architecture not only upholds and protects regional identity within the broader scope of Western modernization and Japanese impacts but also plays a role in its progressive enhancement.

메타버스는 탐험, 사회적 상호 작용, 창의적 표현이 가능한 오픈 월드를 특성으로 하며, 대표적인 메타버스 플랫폼인 로블록스는 십대에게 다양한 게임을 제공하고 있다. 십대 청소년은 엔터테인먼트뿐만 아니라 커뮤 니케이션, 가상 구매, 일탈을 위해 게임에 참여한다. 이에 따라 십대 유저와 아바타 간의 관계를 연구는 계속 되었다. 본 연구는 러시아 십대 유저를 대상으로 로블록스 플레이어의 게임 동기와 아바타의 동기화 사이의 연관성을 조사한다. 본 논문을 위해 러시아 십대 청소년 133명을 대상으로 게임 동기와 아바타 동기화 부문 에 대한 20개의 문항으로 구성된 온라인 설문조사를 실시했다. 그 결과 게임 동기와 아바타 동기화 사이에 상관관계가 나타났다. 일례로 일탈을 위해 로블록스를 하는 유저는 아바타를 자신(아바타-나)과 같다고 인식 하는 것으로 나타났으며, 사회적 동기를 갖고 로블록스를 즐기는 유저는 아바타를 하나의 도구로 인식하는 것으로 나타났다. 아바타를 '나'로 인식하는 것은 모든 게임 동기와 상관관계가 있는 것으로 나타났다. 또한 본 논문의 연구 결과는 아바타의 외형이 아바타 동기화와 높은 관련이 있다는 것을 보여주었다. 유저가 아바 타를 어떻게 인식하는 지를 이해하는 것은 메타버스 내에서 보다 안전하고 사용자 친화적인 온라인 환경을 조성하고 더 많은 플레이어를 끌어들이는 데 있어서 매우 중요한 요소임을 확인하였다.

Thermite welding is an exceptional process that does not require additional energy supplies, resulting in welded joints that exhibit mechanical properties and conductivity equivalent to those of the parent materials. The global adoption of thermite welding is growing across various industries. However, in Korea, limited research is being conducted on the core technology of thermite welding. Currently, domestic production of thermite powder in Korea involves recycling copper oxide (CuO). Unfortunately, controlling the particle size of waste CuO poses challenges, leading to the unwanted formation of pores and cracks during thermite welding. In this study, we investigate the influence of powder particle size on thermite welding in the production of Cu-thermite powder using waste CuO. We conduct the ball milling process for 0.5–24 h using recycled CuO. The evolution of the powder shape and size is analyzed using particle size analysis and scanning electron microscopy (SEM). Furthermore, we examine the thermal reaction characteristics through differential scanning calorimetry. Additionally, the microstructures of the welded samples are observed using optical microscopy and SEM to evaluate the impact of powder particle size on weldability. Lastly, hardness measurements are performed to assess the strengths of the welded materials.

Due to its excellent processability, thermal conductivity and high corrosion resistance, copper tubes applied to heat exchangers are being joined through brazing to increase heat exchange efficiency. In order to improve performance, the issue of joint quality of copper tubes, a major member of heat exchangers, is emerging, so research is needed to obtain excellent joint quality of brazing joints that may be damaged. In this study, the quality change of joints according to process variables was studied through induction heating brazing experiments using high frequency. The depth of penetration, which indicates the quality of the junction, was measured, and the center position of the high-frequency electrode and the height of the electrode, which change the location of the heat source applied to the junction, were selected as process variables. Lastly, the thermal image data obtained between the brazing experiments were obtained and the joint quality according to the temperature gradient of the joint was analyzed.

This study investigates the relationship between high school students’ subjective wellbeing, English learning motivation, and English proficiency. Three sub-components of subjective well-being were included in this study: positive efficacy well-being, positive emotional well-being, and positive relationship well-being. In all subcomponents of subjective well-being, the mean value of female students was higher than that of male students. In addition, the students with upper and middle levels of English proficiency showed higher subjective well-being than those with a lower level. Among the subcomponents of subjective well-being, positive relationship well-being was found to have the most significant effect on both the ideal L2 self and the ought-to L2 self. Among English learning motivations, the higher the ideal L2 self, the higher the English proficiency. The subjective well-being and the ideal L2 self positively affected English proficiency. This study suggests that appropriate educational activities are needed to enhance students’ subjective well-being and form a concrete ideal L2 self.

The bones of the human body support the structures of the body and provide protection for a person’s internal organs. Bone metabolic diseases are on the rise due to a significant increase in life expectancy over a short period of time. Therefore, we investigated the osteoblast differentiation promoting and osteoclastogenesis inhibitory activities of fermented Benincasa hispida cong. (HR1901-BS, HR1901-BSaf). We evaluated the alkaline phosphatase (ALP) activity of MC3T3-E1 mouse calvarial-derived osteoblasts. We also evaluated expression of ALP, osteocalcin (OCN), and runt-related transcription factor 2 (Runx2), which regulate osteoblast differentiation. To assess effects on osteoclast formation, tartrate-resistant acid phosphatase (TRAP) activity in RAW264.7 cells was analyzed. ALP activity increased by 121-136% and 140-156%, respectively in the presence of HR1901-BS and HR1901- BSaf. Expression of osteoblast differentiation factor also increased significantly. We also confirmed that HR1901-BS and HR1901-BSaf decreased TRAP activity in osteoclasts by 35-47% and 23-39%, respectively. Our results showed that fermented Benincasa hispida cong. (HR1901-BS, HR1901-BSaf) increase bone mineralization and osteoblast differentiation activity in MC3T3-E1 cells, and inhibit bone resorption activity in RAW264.7 cells. In conclusion, fermented Benincasa hispida cong. (HR1901-BS, HR1901-BSaf) can be used as an effective natural resource for preventing and treating bone-related diseases.

The use of heat exchangers in various applications such as chemical, air conditioning systems, fuel processing, and power industries is increasing. In order to improve the performance of the heat exchanger, the problem of bonding quality of the copper tube, which is a major member, is emerging. However, since the copper tube is in the form of a pipe, it is difficult to identify internal defects with external factors. In this study, a thermal imaging camera was used to develop and verify an algorithm for detecting defects in the brazing part, and in the process, the brazing performance characteristics were analyzed according to the electrode position, and finally, a learning model was developed and performance evaluation was performed. It was confirmed that the method of supplying heat to the base material and melting the filler metal through the heat transfer effect is more effective than supplying heat input to the filler metal in the bonding process of copper tubes through high-frequency induction heating brazing. Thermal image data was used to develop a defect discrimination model, and 80% of training data and 20% of test data were selected, and a neural network-based single-layer copper tube brazing defect discrimination model was developed through k-Flod cross-validation., the prediction accuracy of 95.2% was confirmed as a result of the error matrix analysis.

Fresh Omija (Schisandra chinensis) has good marketability, but its quality is difficult to maintain during storage and distribution. Freezing and freeze-thawing treatments can be utilized for the quality maintenance and processing of cold press juice. In this study, the color, antioxidant properties, and the major components of soaked liquor from Omija with freeze-thawing treatment were analyzed during the extraction periods. Each of the frozen and freeze-thawed Omija samples was soaked in 35% ethanol, extracted for 15 days, and used for analysis. The frozen and freeze-thawed samples showed a tendency toward better color and higher antioxidant activity and major component levels than the controls, and freeze-thawing was the best. The results of this study showed that freeze-thawing treatment improved the color, antioxidant properties, and level of the major components of Omija soaked liquor, and freeze storage is suitable for making soaked liquor.

This study is aimed to analyze the economic feasibility of yellowtail culture using the copper alloy net cage in Gyeongsangbuk-do. First of all, in order to evaluate the copper alloy net cage on yellowtail culture, I review the trend on the yellowtail culture industry and research the concept of copper alloy net cage. The copper-alloy net cage is now recognized as an advantages of its system stability, recycling, antibiosis and food safety. The results were summarized as follows: first, there was significant meaning of the profit model of yellowtail culture by the price difference. Second, I analyzed in the economic feasibility of yellowtail culture using the copper alloy net cage, internal rate of return (IRR) was 51.58%, a benefit-cost ratio was shown to be 2.27 and net present value (NPV) was 1,087,337 thousand won, which indicates the economic feasibility of yellowtail culture using the copper alloy net cage is profitable. Finally, in order to improve the economic valuation, it is necessary to focus more on the developing of technology and cost reduction strategy on the copper alloy net cage.

The concern on the greenhouse gas emission is strongly increasing globally. In fishery industry section, the greenhouse gas emissions are an important issue according to The Paris Climate Change Accord in 2015. The Korean government has a plan to reduce the GHG emissions as 4.8% compared to the BAU in fisheries until 2020. Furthermore, the Korean government has also declared to achieve the carbon neutrality in 2050 at the Climate Adaptation Summit 2021. However, the investigation on the GHG emissions from Korean fisheries did not carry out extensively. Most studies on GHG emissions from Korean fishery have dealt with the GHG emissions by fishery classification so far. However, follow-up studies related to GHG emissions from fisheries need to evaluate the GHG emission level by species to prepare the adoption of environmental labels and declarations (ISO 14020). The purpose of this research is to investigate which degree of GHG emitted to produce the species (hairtail and small yellow croaker) from various fisheries. Here, we calculated the GHG emission to produce the species from the fisheries using the Life Cycle Assessment method. The system boundary and input parameters for each process level are defined for the LCA analysis. The fuel use coefficients of the fisheries for the species are also calculated according to the fuel type. The GHG emissions from sea activities by the fisheries will be dealt with. Furthermore, the GHG emissions for producing the unit weight species and annual production are calculated by fishery classification. The results will be helpful to understand the circumstances of GHG emissions from Korean fisheries.

신종코로나바이러스감염증(코로나19)의 확산과 거리두기와 같은 방역 정책의 시행은 도심의 생활인구 분포에 상당한 변화를 가져왔다. 그러나 이러한 변화의 양상은 서울시 안에서도 상권의 유형과 주거인구의 특성에 따라 다르게 나타나며, 외국인 밀집지역 간에도 해당 지역에 주로 거주하는 외국인의 체류 기간과 이주 목적 등에 따라 상당한 차이를 보일 수 있다. 본 연구에서는 서울의 대표적인 중국인 밀집지역인 가리봉동과 대림2동을 사례로, 두 지역에서 코로나19 확산 이후 내외국인의 분리 수준이 어떻게 변화했는지 살펴볼 것이다. 내외국인의 공간적 분포는 서울 생활인구 데이터를 통해 확인하였으며, 분리 수준의 측정에는 커널 밀도 기반의 측도인 S를 사용하였다. 본 연구 결과는 코로나19가 중국인 밀집지역에 미친 영향을 실증적으로 파악하고, 지역의 특성에 따라 이러한 영향이 차별적으로 나타날 수 있음을 밝혔다는 점에서 의미가 있다.

본 논문에서는 독일 통일과정에서의 동·서독 주민의 역할을 고찰하였다. 독일정치는 경제적 발전과 사회이익을 위한 동서독 통일, 즉 게젤 샤프트(Gesellschaft)를 추구하였으나, 동서독 주민은 이를 위한 게마인샤프트(Gemeinschaft) 복원을 위해 노력해 왔다. 본고에서는 40여 년간의 분단 이후 독일통일은 외적으로 동독에 대한 서독의 흡수통일 의 형태를 띠고 있으나, 내적으로 동·서독 주민의 게마인샤프트 복원의 과정을 거치고 있음을 강조한다. 본고에서는 분단 시기 동서독 간 이주 및 교류 상황을 고찰하고, 포스트 통일 시기 동독 주민의 정체성 형성을 통한 독일의 게마인샤프트 복원 과정을 분석하였다.

환경 오염과 지구 온난화의 위협이 구체적으로 모습을 드러내는 가운데 사회 전반적으로 녹색 경영의 중요성이 과거 어느 때보다 부각되고 있다. 이러한 현실 흐름을 반영하여 녹색 경영을 실행하는 기업들이 최근 들어 점점 증가하고 있다. 녹색 경영에 관한 기존 연구들에서는 녹색 경영의 의의와 중요성, 녹색 경영의 성과, 그리고 녹색 경영에 대한 영향 요인에 관하여 다루어 왔다. 본 논문에서는 녹색 경영 실행에 영향을 미치는 기업 내부의 촉진 동인에 관하여 살펴보았다. 66개 중소 기업에 대한 통계 분석 결과, 외부 연계, R&D 역량, 그리고 조직 문화 모두 기업의 녹색 경영 실행에 긍정적인 영향을 미치는 것으로 나타났다. 무엇보다도, 독립 변수들 가운데 조직 문화의 영향이 가장 두드러지는 것으로 파악되었다. 녹색 경영 요소들 간의 관계를 주로 살펴본 기존 연구들과 달리, 녹색 경영 실행에 대한 기업 본원적 요소의 영향에 관하여 살펴보았다는 점에서 본 논문은 의의가 적지 않다. 향후 연구에서는 더욱 다양한 기업 본원적 요소의 영향에 관하여 살펴볼 필요가 있을 것이다.