A digital twin (DT) is a virtual model designed to accurately reflect a physical object. We examine the economic benefits of digital aqua twin platform technology, which is applied to aquaculture to optimize production of cultured olive flounder and eel in South Korea. The economic benefits consist of two parts: (1) the benefits from technology development and (2) the benefits from technology adoption. The findings reveal that the benefits from technology development are greater than those from technology adoption. This implies that it is necessary to consider the former, which is often ignored in the previous literature, in quantifying the economic benefits of information technology.

This study investigates the opening force required for shucking farmed oysters to support the development of automated oyster-shucking systems. Oysters sourced from Yeosu and Tongyeong were tested for shell length, width, height, total weight, meat weight, and opening force. Results showed an average opening force of 8.1 kgf for one-year-old Yeosu oysters, 7.4 kgf for one-year-old Tongyeong oysters, and 8.7 kgf for two-year-old Tongyeong oysters, with correlations to shell width, height, and meat weight depending on production sea area and growing age. These findings highlight production sea area and growing age-based differences in oyster characteristics, contributing foundational data to advancing automation in oyster shucking.

완도 지역 전복 양식장 주변 표층퇴적물을 대상으로 퇴적물의 입도, 총유기탄소(TOC), 중금속(Fe, Li, Cu, Zn, Pb, Cd, Cr, As, Ni, Hg) 분포와 조절요인을 분석하고, 생태학적 위험성을 평가하였다. 퇴적물은 주로 실트와 점토로 구성되었으며 일부 지역에서는 모래와 자갈이 혼합된 퇴적물이 확인되었다. TOC 함량은 평균입도와 높은 상관성을 보였으며, 평균값은 0.76%로 나타나 양식 과정에서 발생한 유기물과의 연관성을 제시하였다. 퇴적물 내 Ni, Cd, Zn, Cu는 양식장 활동 및 유기물 축적의 영향을 받으며, Cd는 가장 높은 농축을 보임 으로써 주요 오염원으로 확인되었다. 특히, Cd의 축적은 잔류 해조류 침전과 CaCO3 침전 과정에서 치환작용과 연관이 있는 것으로 해석 되었다. 생태학적 위해도 평가에서는 연구지역 대부분이 중간 위험 수준으로 나타났으며, Cd는 주요 생태학적 위해 요인으로 확인되었다.

This study aims to establish the concept of fish welfare and develop guidelines for its implementation in South Korean aquaculture. As global awareness of animal welfare grows, scientific evidence shows that fish are sentient beings capable of experiencing pain and that stress has led to increased demand for welfare standards in aquaculture. International organizations like WOAH and the EU have set welfare standards for farmed fish, emphasizing their importance for health, productivity, and food safety. However, in South Korea, fish welfare is still an emerging concept with limited research. This study systematically defines fish welfare, assesses its feasibility in domestic aquaculture, and proposes guidelines tailored to local conditions. The findings highlight the need for gradual implementation, considering the unique biological and environmental factors in fish farming.

This study examines the Banja Dancheong style of traditional Korean architecture, with a particular emphasis on the lotus pattern found among the Woomul Banja ceiling patterns. The genesis of Korean ceiling decoration motifs can be traced back to the Goguryeo mural tombs of the mid-4th century. The oldest known examples of Banja Dancheong styles in Korean traditional architecture are Beomja lotus pattern decorated in well-shaped Banja of the Daeungjeon Hall of Bongjeongsa Temple in Andong (1435), the Geungnakbojeon Hall of Muwisa Temple in Gangjin (1430) and the Guksajeon Hall of Songgwangsa Temple (15th century). This Beomja lotus pattern, adorned with the ‘Om Mani Padme Hum’ mantra, emerges as an almost definitive example. Therefore, it is evident that this decorative element stands as a quintessential exemplar of the early style among well-shaped Banja decorations in Korean temple architecture. The Ohwayeonhwadangcho pattern, encapsulating the essence of the lotus motif, is a Dancheong pattern with a lineage that stretches back to the early Joseon Dynasty, where it was initially employed in the Banja wells. This pattern exhibits design characteristics that are perfectly suited to the square Banja wells. The lotus pattern, thus, has been extensively utilized as a decorative motif in palaces, temples, and Confucian architectural structures, evolving continuously from Korea’s Goguryeo period Dancheong patterns to the present day.

The purpose of this study is to estimate the production function of the oliver flounder (Paralichthys olivaceus) aquaculture industry, analyze its efficiency, and provide implications for sustainable aquaculture. For this purpose, the SFA model was utilized. The results of this study are as follows. First, the coefficient values of labor wages and farm area are higher than other inputs. This suggests that the Korean oliver flounder aquaculture industry is labor-intensive. Second, disease management is highly influenced by management efficiency. The more frequently farms are disinfected and culled, the higher the management efficiency with culling having a greater impact on management efficiency. Finally, the cost inputs of high and low-efficiency fish farms were analyzed, and it is recommended that wages, electricity, drugs, and oxygen should be kept at a reasonable level rather than excessive. However, the higher the inputs for mortality removal and disease management, the higher the management efficiency. In other words, improving the farm environment is the most important to achieve sustainability and management efficiency of Korean oliver flounder farming.

본 연구는 흰다리새우 양식장 양식수를 대상으로 수질 분석(수온, 염분, 용존산소, pH) 및 16SrRNA 유전자 발현을 이용하여 양식수에 존재하는 유용 미생물을 확인하였다. 연구 결과 수질이 양호한 양식수에서 Nitrosomonas, Nitrospina, Nitrospira 등의 질소 순환 과정에 관여하는 미생물 및 유기화합물의 분해에 관여하는 미생물들을 확인하였다. 본 연구 결과는 양식수 수질의 정화에 관여하는 미생물의 확인 및 적용을 통한 지속적인 환경 친화적 양식 시스템의 개발에 활용 가능하리라 생각된다.

This study aimed to analyze the behavioral changes and stress responses of cultured leather carp (Cyprinus carpio nudus) for repeated noise exposure. The acoustic stimulus was composed of twenty sets of one second duration noise with an average noise of 147 dB, which was repeated every five minutes. The behavioral changes of the fish were analyzed immediately after noise exposure, three hours, six hours, twelve hours, 24 hours, and 48 hours later. The stress hormone response was also analyzed and compared through blood collection. It was confirmed that the fish were significantly affected by the noise stimulus and unable to be free or adapt to it untill the end of the experiment. The cortisol concentration was also the highest at 38.2 ug/dL after six hours; the glucose concentration did not decrease over time, indicating that stress was maintained and had a significant effect.

본 연구에서는 국내산 양식 자주복의 테트로도톡신 및 그 유사체를 UHPLC-QqQ MS를 이용하여 분석하였다. 테 트로도톡신 분석법의 직선성과 일내 및 일간 정확도와 정 밀성, 검출 한계, 정량 한계를 구한 결과 CODEX 가이드라 인 기준에 적합하였다. 국내산 양식 자주복의 부위별 테트 로도톡신 함량을 분석한 결과 일부 시료의 간과 근육 부위 를 제외한 대부분의 시료에서 테트로도톡신이 검출되지 않 았으며, 검출된 시료도 간과 근육 부위에서는 각각 0.07 mg/ kg, 0.06 mg/kg의 낮은 농도로 테트로도톡신이 검출되었다. 테트로도톡신 유사체의 경우 국내산 양식 자주복에서 dideoxyTTX, trideoxyTTX, norTTX가 검출되었다. 이 중 dideoxyTTX는 국내산 양식 자주복의 모든 부위에서 주요 테트로도톡신 유사체로 확인되었다. 본 연구를 통해 국내산 양식 자주복의 테트로도톡신 및 그 유사체 분포를 이해 하는데 도움을 줄 수 있으며 국내 해양생물 독소 데이터베 이스 구축에 기여할 수 있을 것으로 사료된다.

본 논문은 완도 신흥사 목조약사여래좌상의 복장 기록인 중수 원문(1865년)의 해석과 불 상 양식의 비교분석을 통해 불상의 제작 시기가 1628년임을 밝힌 것이다. 중수 원문의 기록 에 의하면, 완도 신흥사 목조약사여래좌상은 1628년에 조성되었고, 1802년ㆍ1845년ㆍ 1865년에 걸쳐 중수되었으며, 원 봉안처는 해남 대흥사 대광명전이었고, 1845년과 1865 년에 불상의 중수를 주도한 승려는 초의 의순이었음이 확인된다. 초의 의순은 19세기 전라 도와 경상도 지역에서 활동한 화승 원담 내원(1845년)과 용완(원) 기연(1865년)과 함께 신 흥사 목조약사여래좌상을 개금ㆍ중수했다. 특히 초의 의순은 선교(禪敎)와 학예(學藝)에 뛰 어난 자질을 가졌으며 19세기의 대흥사 불사를 이끈 승려이다. 두 화승(내원과 기연)은 초의 의순이 주도한 대흥사 불화 제작에도 참여했다. 완도 신흥사 목조약사여래좌상이 1628년에 조성된 사실은 중수 원문의 기록과 17세기 전반에 조성된 불상들과의 양식 비교를 통해 파악했다. 초의 의순이 쓴 ｢대둔사신건광명전상 량문(大芚寺新建光明殿上樑文)｣, ｢대둔사비로전신건화연소(大芚寺毘盧殿新建化緣疏)｣, ｢불상개금모연문(佛像改金募緣文)｣에 의하면 신흥사 목조약사여래좌상은 1628년에 조성 된 후 대흥사 대광명전 비로자나삼불상 가운데 좌존으로 봉안되었던 것으로 추정된다. 대흥 사 대광명전은 화재로 소실되어 1841년에 새로 건립되었다. 신흥사 목조약사여래좌상의 양식 특징은 조각승 태전이 조성한 대흥사 목조약사ㆍ아미타불상(1612년)을 계승했고, 현진이 1610년에서 1630년 사이에 제작한 불상과 친연성이 강 한 것을 알 수 있다. 이 외에도 응원ㆍ인균파 및 수연파 불상의 특징도 일부 반영되어 있다. 신흥사 목조약사여래좌상은 17세기 전반에 조성되어 19세기 대흥사 현창 운동 과정에서 새로 건립된 대광명전에 봉안되어 개금ㆍ중수된 불상으로, 교학과 학예면에서 뛰어난 자질을 가진 초의 의순이 불상의 개금ㆍ중수 불사를 주도한 사실을 알려준다는 점에서, 조선 후기 불교사 및 불교미술사를 연구하는데 자료의 가치가 매우 크다.

As global climate change impacts become more apparent, countries are implementing various policies to achieve carbon neutrality that can be categorized into direct regulations and market-based indirect regulations. The latter, utilizing economic incentives, is considered more efficient in transforming corporate behavior and promoting voluntary efforts for carbon reduction. In alignment with international trends, South Korea has introduced the Emission Trading System (ETS) in 2015. Despite this, the domestic carbon market remains underdeveloped, with low ETS participation, particularly in the aquaculture sector. In order to activate external projects under the ETS, this study proposes short-term strategies including linking ETS with popular eco-friendly energy distribution projects, developing standardized monitoring techniques, and integrating carbon reduction initiatives with other support mechanisms such as direct payment programs. Long-term strategies focus on developing new methodologies for external projects, promoting the use of renewable energy, and enhancing technologies to reduce energy consumption in aquaculture operations. By implementing these strategies, the study aims to enhance the participation of the aquaculture sector in carbon reduction efforts, contributing to the overall goal of carbon neutrality.

본 연구는 현 시대에 등장하는 일러스트레이션을 하인리히 뵐플린이 제시한 이론의 관점으로 접근하였으며, 시각적 회화와 촉각적 회화로 분류하여 해석하고자 한다. 일러스트레이션에 나타난 표현기법을 통합적으로 살펴보기 위해서 그림책작가를 선정한 후, 인 터넷 사이트나 출간된 서적 등에서 해당 작가의 작품 이미지를 수집하였다. 이들을 시각적 회 화와 촉각적 회화로 분류하였다. 윤곽선의 활용에 대한 부분이 가장 확실한 특징이라고 파악 하여, 윤곽선 활용 유무를 기준으로 분류하였다. 이들 중에서 작가가 각 작품마다 다른 스타일 을 추구하는 경우, 본 연구에서 수집한 작품을 중심으로 분류하였다.

본 논문은 이건용이 5⋅18 민주화운동이라는 역사적 현실에 직면하여 예술가곡 작곡을 중단하 고 대중적 장르인 쉬운 ‘노래’로 양식변화를 한 것에 주목하였다. 1980년대의 비판적 현실을 민중 과 소통하기 위한 그의 노래 작곡은 음악과 삶의 관계성을 중시하는 그의 현실결부적인 음악관에 따른 것이다. 군사정부가 물러난 1990년대에 그의 예술가곡 작곡은 다시 시작된다. 이 시기의 가 곡 작곡에서도 이전 시기의 가곡 작품들과 구별되는 양식변화가 나타난다. 1970년대의 작품들에 서 존재론적이고 자아탐구적인 시적 내용이 두드러지는 것에 반해, 1990년대 이후의 작품들에서 는 공동체와의 공유적 감성이 강화되어 있으며, 양식적으로도 단순화된 경향을 보인다. 이건용은 음악의 가치를 작품의 완결성보다는 공동체적인 삶과의 상호관계 속에서 역동적으로 변화하는 ‘되어감’의 과정에서 파악한다. 그의 노래와 가곡 작곡에 나타난 양식변화는 이러한 ‘되어감’의 과 정을 보여주고 있다.

This study was conducted to determine the efficiency of the distribution process of the abalone industry, that is, whether there is market dominance. In addition, it was intended to find out whether there is an asymmetric price transfer phenomenon between the distribution stage of the abalone industry. The results of this study are summarized as follows. First, the asymmetric price transition effect on the abalone price between producer and wholesale market was found to be positive. It means that the distribution structure is incomplete between the producer and the wholesale market and the abalone market is operating inefficiently. Second, as a result of estimating the market power between the producer and the wholesale market, the market power coefficient between the producer and the Hanam wholesale market, and the producer and the Incheon wholesale market were 0.0618 and 0.0735. Summarizing the analysis results, the abalone market has an asymmetric price transition between producer and wholesale markets, but the market dominance coefficient is relatively low. These results suggest that the asymmetry of price transition is mainly caused by market dominance, but can also be caused by other factors such as information asymmetry. In the future, in addition to the market dominance of the abalone market, it is judged that research on factors related to the asymmetry of price transition is necessary.

This study focuses on analyzing the energy-saving effects of the recirculation aquaculture system using seawater source heat pumps and solar power generation. Based on the thermal load analysis conducted using the transient system simulation tool, the annual energy consumption of the recirculation aquaculture system was analyzed and the energy-saving effects of utilizing the photovoltaic system was evaluated. When analyzing the heat load, the sea areas where the fish farms are located, the type of breeding tank, and the circulation rate of breeding water were taken into consideration. In addition, a method for determining the appropriate capacity for each operation time was examined when applying the energy storage system instead of the existing diesel generator as an emergency power, which is required to maintain the water temperature of breeding water during power outage. The results suggest that, among the four seas considered, Jeju should be estimated to achieve the highest energy-saving performance using the solar power generation, with approximately 45% energy savings.

This study aimed to quantitatively analyze the risk using data from 329 safety accidents that occurred in aquaculture fisheries management vessels over the recent five years (2018-2022). For quantitative risk analysis, the Bayesian network proposed by the International Maritime Organization (IMO) was used to analyze the risk level according to the fishing process and cause of safety accidents. Among the work processes, the fishing process was analyzed to have the highest risk, being 12.5 times that of the navigation, 2.7 times that of the maintenance, and 8.8 times that of the loading and unloading. Among the causes of accidents, the hull and working environment showed the highest risk, being 1.7 times that of fishing gear and equipment, 4.7 times that of machinery and equipment, and 9.4 times that of external environment. By quantitatively analyzing the safety accident risks for 64 combinations of these four work processes and four accident causes, this study provided fundamental data to reduce safety accidents occurring in aquaculture fisheries management vessels.