The Indian Ocean is the second-largest tuna fishing ground in the world, accounting for approximately 1.2 million tonnes (23%) of the estimated 5.2 million tonnes of global commercial tuna catch in 2023. This study examined the relationship between tuna catches, specifically skipjack, bigeye, and yellowfin tunas, and prey biomass (Nautical Area Scattering Coefficient, NASC) estimated from acoustic surveys conducted in the southwestern Indian Ocean from 20 April to 15 May 2019. Environmental variables were derived from the Copernicus Ocean Model, and tuna length data from the IOTC. The estimated total tuna catch in the study area was approximately 166,400 tonnes, with the northwestern region showing the highest catches and NASC values. Tuna catches increased with NASC; however, the relationship was non-linear. While skipjack showed no significant correlation with NASC, bigeye and yellowfin tunas exhibited weak but significant positive correlations. Environmental analysis revealed that the northern waters had high surface temperatures, low salinity, and low oxygen levels, with mid and deep layers characterized by low temperature, salinity, oxygen, and chlorophyll. These findings offer a foundation for understanding tuna distribution in relation to prey and environmental conditions, highlighting the need for future species- and fishery-specific studies to support sustainable tuna resource management.

This study aimed to enhance the operational efficiency and safety of offshore eel trap fisheries by developing six types of automated fishing equipment: a bait crusher, bait cutter, main line arranging device, trap cleaning device, eel sorting device, and fish pump system. Sea trials demonstrated that the bait crusher and bait cutter significantly reduced manual labor and processing time while maintaining bait quality. The main line arranging device improved productivity and safety by automating the sorting of looped cords. The trap cleaning device effectively removed fouling organisms using high-pressure water and rotating brushes. The eel sorting device enabled automatic size-based selection, improving resource management and operational efficiency. The fish pump system transferred eels rapidly with minimal physical damage, reducing unloading time by over 80% and decreasing labor requirements. A satisfaction survey of fishery participants confirmed that all developed devices were highly effective in reducing workload, enhancing safety, and improving operational performance. The automated equipment developed in this study is expected to contribute to the sustainable management of offshore eel trap fisheries and to offer potential applicability to other coastal and offshore fisheries.

This study examined the offshore eel trap fishing process using one year of fishing logs and fishermen’s insights to identify key operational challenges and propose equipment improvement for greater efficiency and safety. Conger eel catches varied significantly by season, depth, and temperature, peaking in winter at 85–90 m and 23°C. The western waters of Jeju Island were identified as a major fishing ground, with the highest catch recorded in November and the lowest in July, reflecting seasonal trends. Each fishing operation deployed about 10,000 traps, with an average loss of 38 traps, posing economic concerns. The process involved intensive manual labor in bait preparation, trap retrieval, catch separation, line loading, and unloading, leading to high physical demands and safety risks. To address these issues, the study proposed automation through the development of a line loading device, trap cleaning device, bait processing machine, and automatic catch separator. These innovations could reduce the labor force required by one to two workers per process, alleviate workloads, and enhance resource management. By integrating quantitative logbook analysis with field-based knowledge, this study offers practical value. Further research is recommended on automation development, cost-effectiveness, and field validation to support safer and more sustainable eel trap fisheries.

We presented foundational findings regarding the occurrence and acoustic characteristics of the finless porpoise through passive acoustic and visual surveys conducted on the southern coast of Korea, specifically at Hadong Jungpyeong Port. Over a survey period spanning from July 8 to August 16, 2023, totaling 40 days, we observed peaks in the number of clicks produced by this species on July 15, July 24, August 4, August 11, and August 16. The highest count, totaling 18,924 clicks, was recorded on July 15th, while the lowest count, at 3,888 clicks, occurred on August 8th. Examining the acoustic characteristics throughout the diurnal cycle, we found that the peak activity in terms of DPM (detection positive minute for one hour), DP10M (DPM for ten minutes), and overall number of click sounds was observed between 05:00 and 08:00, with a secondary peak occurring from 17:00 to 18:00. The quietest period was noted between 23:00 and 02:00. Furthermore, there was a significant increase in the number of clicks from sunrise, with the maximum count of 21,581 clicks recorded at 6 AM. This count gradually decreased until noon, experienced a slight increase thereafter, peaked again at sunset, and then declined. The dominant frequency mode of this species was 126 kHz, with a concentration ranging from 112 to 136 kHz. The average duration of a click sound was 127 ㎲, with approximately 16 sinusoids (cycles) within each click sound and an average cycle length of approximately 7.9 ㎲. These findings from our study are anticipated to serve as foundational data for the development of a Korean pinger and acoustic warning system.

Recently, domestic fishing production of Japanese horse mackerel has been continuously decreasing. To achieve sustainable fishing of this species, it is essential to acquire its target strength (TS) for accurate biomass estimation and to study its ecological characteristics. To date, there has been no TS research using a broadband echosounder targeting Japanese horse mackerel. In this study, for the first time, we synchronized an underwater camera with a broadband frequency (nominal center frequency of 200 kHz, range: 160-260 kHz) to measure the TS according to the body size (16.8-35.5 cm) and swimming angle of the species. The relationship between Japanese horse mackerel length and body weight showed a general tendency for body weight to increase as length increased. The pattern of the frequency spectra (average values) by body length exhibited a similar trend regardless of body length, with no significant fluctuations in frequency observed. The lowest TS value was observed at 243 kHz while the highest TS values were recorded at 180 and 257.5 kHz. The frequency spectra for the swimming angles appeared to be flat at angles of –5, 0, 30, 60, 75, and 80° while detecting more general trends of frequency spectra for swimming angle proved challenging. The results of this study can serve as fundamental data for Japanese horse mackerel biomass estimation and ecological research.

Agarum clathratum (A. clathratum) is a marine brown algal species that belongs to the Costariaceae family and has antioxidant and anti-microbial properties. However, the anti-inflammatory effects of A. clathratum and the molecular mechanisms involved have not been determined so far. This study aimed to investigate the anti-inflammatory effects of A. clathratum extracts in THP-1 macrophages stimulated by lipopolysaccharide (LPS) derived from Porphyromonas gingivalis. The THP-1 cells were differentiated with 12-O-tetradecanoylphorbol-13-acetate and treated with A. clathratum before LPS stimulation. Cell viability was assessed using the trypan blue exclusion assay. The expression of pro-inflammatory response-associated molecules was evaluated by quantitative real-time polymerase chain reaction and Western blot analysis. A. clathratum treatment inhibited the expression of interleukin-1β in LPS-stimulated THP-1 macrophages without causing any cytotoxicity. The anti-inflammatory effect of A. clathratum resulted in a significant repression of the JNK/c-Jun signaling axis, a key regulator in inflammation responses. This study highlights the possible role of A. clathratum in the inhibition of pro-inflammatory cytokines via suppression of the JNK/c-Jun signaling axis and suggests that A. clathratum could serve as a marine-derived anti-inflammatory agent in periodontitis.

A new commercial strain “Mongdol” of oyster mushroom was developed by hyphal anastomosis. It was improvedwith hybridization between monokaryotic strain derived from Pleurotus ostreatus ASI 0627 and dikaryotic strain derived from P.ostreatus ASI 2929. The optimum temperature of mycelial growth and fruiting body development were 25~30oC and 12~18oC,respectively. When two different media including PDA (potato dextrose agar medium) and MCM (mushroom complete medium)were compared, the mycelial growth of this mushroom was faster in MCM than in PDA. Similar result was observed with thecontrol strain P. ostreatus ASI 2504. Analysis of the genetic characteristics of the new cultivar “Mongdol” showed a different DNAprofile as that of the control strain ASI 2504, when RAPD (Random Amplified Polymorphic DNA) primer URP3 and URP6 wereused. Fruiting body production per bottle was about 106 g using demonstration farms. The color of pileus was blackish gray andthe stipe was long. Therefore, we expect that this new strain “Mongdol” will satisfy the consumer’s demand for high qualitymushrooms.

느타리는 한국에서 많이 재배되고 소비되는 버섯 중의 하나이다. 국내외에서 수집한 느타리 균주의 재배적 특성을 이용하여 모균주를 선발하였다. 품질이우수한 품종 ‘구슬(ASI 2018 x 수한 x 청풍)’을 수량이 다소 많은 품종 ‘야산(만추리 x 춘추2호)’과 교잡하여 수량이 많고 품질이 우수한 품종 ‘몽돌’을 2013년에 개발하였다. ‘몽돌’은 품질이 우수한 품종 ‘수한’의 대체 품종으로 병, 봉지 재배용 품종이다. ‘몽돌’은 균사배양은 23-25℃, 버섯 발생과 생육은 13-17℃가 알맞다. ‘몽돌’은 ‘수한’에 비하여 균사생장이 빠르고, 세균병에 강하며, 환기불량에 아주 강하고, 자실체 모양이 일정하고 안정성이 높으며, 고온에서 짙은 청회색으로 소비자 기호도가 높으며, 수확 시 자실체가 처진 버섯(하등품)이 거의 없는 품종이다. ‘수한’과 동일하게 환기를 많이 시키면 수한보다 키가 작고 갓만 커지므로 환기를 아주 적게 하여야 한다. 이산화탄소 CO2 농도가 800-15,00ppm 에서 품질이 양호한 편이다. 환기를 적게 하면 이산화탄소 농도가 높아져 ‘몽돌’은 키가 크고 수량이 증가하나 ‘수한’은 기형으로 나타난다. 재배 배지는 품종 ‘춘추2호’ 배지와 동일하거나 유사한 배지(톱밥 + 비트펄프 + 면실박 : 5 : 3 : 2)가 알맞다. 초기 생육이 다소 느리나 후기에 생육이 빨라 수확은 ‘수한’에 비해 0.5일 정도 빠르거나 유사하다. 수량성은 배지 종류와 환기량 등 환경조건에 따라 다르나 이 품종의 조건에 잘 맞으면 ‘수한’과 유사하거나 다소 높다. 이 품종은 2014년에 품종보호출원을 하였고 현재 통상실시 중이며, 특히 수확 시 처진 버섯이 ‘수한’은 5-10%이나 이 품종은 거의 없고 환기에 강하여 에너지 절감 효과가 크므로 농가의 경영비 절감과 보급 확대를 기대해 본다.

본 시험은 괘대재배를 한 ‘풍수’, ‘황금배’, ‘신고’, 그리고 ‘감천배’의 관행구와 무대재배를 한 과실에 TiO2나 Kaolin를 엽면처리 하였을 때 과실품질과 흑성병에 미치는 영향을 조사하고자 수행되었다. 1. 관행재배구는 TiO2나 Kaolin 보다 평균과중은 증가하였지만, 수량이 현저하게 감소하여 총 과실생산량은 감소되었다.2. 관행재배구에서의 ‘풍수’와 ‘감천배’의 당도는 TiO2나Kaolin 처리구 보다 높았다.3. ‘황금배’와 ‘감천배’의 과실 경도는 TiO2 처리시 가장 높았으며 Kaolin처리시도 다소 증가시켰다. ‘풍수’와 ‘신고’는 처리 간에 차이가 없었다.4. 과피색은 관행재배구에서 가장 밝은 색도를 보였다.5. TiO2와 Kaolin 처리는 품종에 상관없이 총 폴리페놀 함량을 증가시켰다.6. 엽의 흑성병 발생 억제율은 관행재배구가 ‘풍수’, ‘황금배’,‘신고’에서 낮게 나타났으며 ‘감천배’는 TiO2 처리로 100% 억제되었다.

노랑느타리는 한국에서 자생하는 버섯이나 자연 상태에서 흔하지 않다. 국내외에서 수집한 노 랑느타리 균주의 재배적 특성을 이용하여 모균주를 선발하였다. 수량이 많은 ASI 2978과 색 깔이 아름다운 품종 ‘금빛’의 단핵주간 교잡으로 교잡주를 얻었다. 계통간 교잡주 중에서 저온 에 강하고 색깔이 아름답고 수량이 많은 계통 Pc2011-23을 선발하여 품종심의회에서 ‘장다리’ 로 명명되었다. 품종 ‘장다리’는 특히 저온에 강한 편이다. 버섯 발생온도가 16~24℃로 저온에 서도 원기가 형성되어 생육한다. 생육 적온도 발생온도와 유사하나 19℃에서 품질이 양호하 다. 기존 품종인 ‘금빛’ 보다는 균사생장이 빠르며 자실체 수량도 다소 높다. 따라서 소규모 농가에서 느타리와 동일한 재배사에서 재배하는 농가에게 유리한 품종이다.

35 peri-implantitis recently referred for 10 years showed four types of inflammatory lesions, such as mild granulomatous lesion(n=5), severe granulomatous lesion(n=4), severe inflammatory fibrous scar tissue(n=15), severe abscess formation(n=11). However, the inflammatory lesions were usually localized at the peri-implant area accompanying compensatory hyperplasia of fibrous connective tissue. The fibrous scar and the necrotic abscess frequently occurred depend on the severity of inflammatory reaction. Among 30 cases of severe inflammatory lesions, only 2 cases involved condensing osteitis in adjacent alveolar bone. Thus, we suppose that the inflammatory progression of peri-implantitis could be partly inhibited by the hyperplastic fibrous stromal tissue stimulated by implant material. And more, the focal abscess formed around the implant can be easily drainaged through the fibrous tract of implant pathway, resulted in the chronic persistent inflammatory granulomatous lesion, that is contrast to the common socket granuloma after tooth extraction. However, depend on the degree of inflammatory reaction in the peri-implantitis the inflamed fibrous collagenous tissues, unregenerated graft materials, necrotic abscess and sequestra should be removed by surgical intervention and followed by antibiotic therapy, because the peri-implant tissue is as vivid as the normal periodontium for the inflammatory defense system. Therefore, we suggest that the inflammatory lesions of peri-implantitis be carefully treated to improve the prognosis for the following dental treatments

In this study, hetero-electrode structures have been fabricated to increase luminescence efficiency. The presence of a thin layer of Sn or Ag at the organic-aluminum interface enhanced both electron injection efficiency and electroluminescence when compared to OLEDs using homogeneous electrode. In this paper, the effect of the cathode using Sn/Al hetero electrode structure is observed. Electric properties of the OLED using Sn/Al hetero cathode are improved in comparison of only Al cathode. The hetero-electrode existing different energy level induces the advanced structure of OLED can accumulate electron density. The luminescence efficiency of OLED with Sn/Al of Ag/Al cathode is higher because of their higher electron injection efficiency. And, the turn on voltage of the OLED device using Sn thin layer is lowest as about 10 V.

This study had two main objectives. We first investigated which weather phenomena people were most concerned about in the context of climate change or global warming. Then, we conducted content analysis to find which words were more commonly used with climate change or global warming. For this, we collected web data from Twitter, Naver, and Daum from April to October 2019 in the Republic of Korea. The results suggested that people were more concerned about air quality, followed by typhoons and heat waves. Because this study only considered one warm period in the year of 2019, winter-related weather phenomena such as cold wave and snowfall were not well captured. From Twitter, we were able to find wider range of terminologies and thoughts/opinions than Naver and Daum. Also, more life-relevant weather events such as typhoons and heat waves in Twitter were commonly mentioned compared to Naver and Daum. On the other hand, the comments from Naver and Daum showed relatively narrower and limited terms and thoughts/ opinions. Especially, most of the comments were influenced by headlines of articles. We found many comments about air quality and energy/economic policy. We hope this paper could provide background information about how to promote the climate change education and public awareness and how to efficiently interact with general audiences.

현대사회는 디자인(Design)이라는 단어가 탄생하고 인간에게 개념이 확립되는 동안 많은 의미를 내포한다. 계속해서 발전하고 있는 사회에 있어 디자인은 인간과 함께 등장해야 하는 중요한 요소 중 하나인 것이다. 변화에 앞서 디자인 교육은 적극적으로 새로움을 받아들이고 재생산하는 학문이라고 할 수 있는 것이다. 현대 디자인 교육에 바우하우스의 디자인 교육의 방법론을 모태로 디자인 각 분야에 적용되고 있다. 인간의 질 높은 삶을 변화하는 무한한 힘을 지닌 디자인은 새로운 문명과 기술에 힘입어 많은 분야에 세분화 되겠지만, 독창적이고 창조적 역할을 하는 디자인 교육은 바우하우스의 교육을 앞으로도 따를 것이다. 본 연구는 바우하우스의 색채가 이론을 통해 현재 도시가 가지는 문제점을 파악하고 전문적으로 브랜드화 하여 강력한 도시를 개발하는데 목적이 있으며, IRI 형용사스케일에 각 도시별 이미지를 대입하여 얻은 연구의 결과는 도시만의 고유 문화, 경제, 사회에 관한 전반적인 홍보와 도시의 현재 상황을 분석하기 위하여 전문가 프로젝트 팀을 구성하여 각 요소별로 확인해야하며, 상위의 도시가 보여주는 결과를 통해 국내 각 도시가 가지는 환경색채와 어떠한 차이점이 있는지를 비교분석하여 도시이미지를 계획하여야 한다. 이러한 대안을 통해 무분별한 경제와 건축분야의 비대칭 발전에만 높이는게 아니라 올바른 환경색채의 활용과 지속가능한 도시개발, 고유의 정체성 있는 미래지향적인 도시를 만들어 나가야 할 것이다. 도시민의 생활 속에서 행복과 자부심은 어떠한 요소를 필요하지 않는 가장 살기 좋은 도시입니다. 하지만 이러한 도시를 계획하기 위해서는 도시민이 거주하는 환경의 수준이 높아야하며 그 환경은 자연과 색채가 함께 어우러지는 것이다. 도시의 경제적 성장만이 상위에 있는 도시가 아니라 인간과 자연친화적인 도시로 성장하기를 기대한다.

최근 천년초 선인장은 녹차 및 양파와 같은 피토케미칼(phytochemical)에 함유된 페놀성 화합물의 중요한 소재로 보고되고 있다. 본 연구에서는 천년초 열수 및 80% 에탄올 추출물의 총 페놀 및 총 플라보노이드 함량, 항산화 활성(DPPH 라디칼 소거능 및 환원력) 및 항비만 활성을 평가하였다. 총 페놀 함량은 천년초 열수 추출물 및 80% 에탄올 추출물에서 각각 와 mg GAE/g로 나타난 반면, 총 폴라보노이드 함량은 80% 에탄올