이 논문은 남한지역을 대상으로 전기청동기시대의 주거와 환호, 청동기 부장 분묘, 대형 주구묘와 군집묘의 형성, 청동기 소유 주거, 환구 취락의 조성과 운영 등에 주목하여 당시의 사회구조에 대해서 검토한 글이다. 주거공간에서 확인되는 주거 간의 차별화는 취락을 이끄는 지도자 또는 유력자 및 그 의 가족들과 나머지 취락 구성원 간의 차이를 반영하는 것으로 파악하였다. 내환호와 외환호를 경계 로 배치된 대형 주거와 소형 주거의 분포 양상을 갖는 환호취락의 사례가 이를 잘 보여준다. 청동기를 소유한 주거의 존재와 청동 무기를 부장한 분묘의 등장은 요동지역 비파형동검문화와 관련된 것으로 긴장, 갈등, 대립 관계의 산물이면서 당시 사회의 계층분화적, 무장적 성격을 반영한다. 신성한 의례 공간인 환구, 그리고 이와 관련한 대형 가옥의 배치 양상은 엘리트 제사장의 존재를 추정할 수 있는 근거로 볼 수 있다. 이를 통해서 볼 때 전기청동기시대의 사회구조는 상위계층과 일반계층으로 구성 된 것으로 추정된다. 상위계층은 취락의 지도자(권위자)이면서 제사장의 성격을 가지는데, 이 상위계 층의 지위는 한시적인 성취 지위에 해당한다. 남한지역의 전기청동기 사회는 복합사회로 향해가는 긴 여정에서 중요한 기폭제가 되는 시기로 볼 수 있다. 이전 시기에 보이지 않았던 환호와 환구, 분묘와 청동기의 등장과 발전 양상은 전기청동기시대가 사회복합도가 증가한 서열사회에 해당한다는 것을 말 해준다.

Silk fibroin (SF) from silkworms has special qualities, and these qualities have drawn a lot of interest lately in SF-based hydrogels for a range of biological applications. However, because there is a dearth of naïve silk materials to collect and prepare, research on the SF-based hydrogels isolated from spider silks has been rather limited. Thus, this study compared the microstructural properties of silk fibroin (SF) hydrogel scaffold, which was taken from the cocoon of the insect silkworm Bombyx mori, with those of hydrogel scaffolds derived from two types of woven silk glands in the orb-web spider Trichonephila clavata: the major ampullate gland (MAG) and the tubuliform gland (TG). The SF hydrogel, which is stabilized by connected SF fibers, has a loose top structure, high porosity, and translucency, according to our FESEM investigation. While the TG hydrogel showed greater porosity, ridge-like or wall-like structures, and stable biocapacity generated by physical cross-linking, the MAG hydrogel showed even higher porosity, elongated fibrous structures, and superior mechanical properties. It is anticipated that the unique microstructural properties of MAG and TG hydrogels will be advantageous when choosing customized substrates to support particular cell types for tissue engineering and regenerative medicine applications.

This study investigates the phenomenon of task specialization in subterranean termites, focusing on their tunneling behavior. Termites, known for their complex social structure, allocate specific individuals for tunnel construction, rarely switching tasks. To explore this behavior, we developed a simulation model comparing termite groups with and without task shifts. While tunnel orientation showed no significant difference between the two tunnel pattern groups, the absence of task shifts resulted in larger tunnels, indicating enhanced foraging efficiency. This suggests that maintaining a consistent division of labor without task rotation benefits termite foraging. This study sheds light on the ecological advantages of task specialization in social insects, highlighting its role in foraging success and colony survival.

In order to present a predictive drift model, Jeju National University's training ship was tested for about 11 hours and 40 minutes, and 81 samples that selected one of the entire samples at ten-minute intervals were subjected to regression analysis after verifying outliers and influence points. In the outlier and influence point analysis, although there is a part where the wind direction exceeds 1 in the DFBETAS (difference in Betas) value, the CV (cumulative variable) value is 6%, close to 1. Therefore, it was judged that there would be no problem in conducting multiple regression analyses on samples. The standard regression coefficient showed how much current and wind affect the dependent variable. It showed that current speed and direction were the most important variables for drift speed and direction, with values of 47.1% and 58.1%, respectively. The analysis showed that the statistical values indicated the fit of the model at the significance level of 0.05 for multiple regression analysis. The multiple correlation coefficients indicating the degree of influence on the dependent variable were 83.2% and 89.0%, respectively. The determination of coefficients were 69.3% and 79.3%, and the adjusted determination of coefficients were 67.6% and 78.3%, respectively. In this study, a more quantitative prediction model will be presented because it is performed after identifying outliers and influence points of sample data before multiple regression analysis. Therefore, many studies will be active in the future by combining them.

After the United Nations Convention on the Law of the Sea (UNCLOS) and the United Nations Fish Stocks Agreement (UNFSA) came into effect, international cooperation through Regional Fisheries Management Organizations (RFMOs) was required, and each RFMO established and adopted the Conservation and Management Measure (CMM) for the regional Observer Programs to collect data on fishing activities and biological information and to monitor compliance with its CMMs. The observer coverage required by RFMO is set differently for each organization, ranging from 5% to 100%. In addition, tuna-RFMOs recommend increasing observer coverage in longline fisheries by at least 20% for reliable quantitative analysis of not only target species but also bycatch species and ecologically related species such as sharks, seabirds, sea turtles, and marine mammals. Therefore, in this study, we discussed ways to improve the national observer programs of Korean distant water fisheries that should be addressed in the future to respond to the RFMO trends.

The towing distance, which is speed over the ground, and the water flow quantity, which is speed through the water, were used when estimating the amount of Metapenaeus joyneri resources that rose to the surface at night using the swept area method in order to compare and analyze the difference. It was conducted using a shrimp dredge, trial fishing gear for catching Metapenaeus joyneri. Catch during the entire survey period was 188.9 kg. Monthly catch ranged from 3.1 to 109.2 kg, highest in June and lowest in September. The swept volume calculated using the speed over the ground was about 13% higher than using the speed through the water. Metapenaeus joyneri resources estimated using the towing distance ranged from 320.1 to 14,649.8 kg. Resources estimated using the water flow quantity ranged from 278.5 to 12,886.3 kg. Therefore, the amount of Metapenaeus joyneri resources estimated using the speed over the ground was about 14% higher than the method using the speed through the water, indicating that the amount of resources was overestimated.

최근 기후변화에 따라 아열대 작물 재배가 증가하면서 경남지역 망고 재배면적도 크게 증가하고 있다. 하지만 망고에 발생하는 병해충 발생 정보가 부족하여 2022년부터 현재까지 경남지역에 있는 망고농장을 조사하였으 며, 그 결과 병해 6종, 해충 8종 발생을 확인하였다. 특히 경남지역 망고 포장에서 꽃노랑총채벌레, 대만총채벌레, 볼록총채벌레 등의 발생을 확인하였고, 통영, 함안, 밀양 등에서 총채벌레류에 의한 피해가 발생하였다. 많은 농가에서 총채벌레류 방제를 위해 화학농약에 의존하고 있으나 총채벌레는 반복적인 약제 노출시 빠른 세대 진전으로 인해 저항성 발달이 쉽기때문에 방제에 어려움을 겪고 있다. 이러한 문제를 해결하고자 색상별 끈끈이 트랩의 총채벌레류 유인효과를 확인하였으며, 꽃노랑총채벌레는 노랑, 주황, 연두, 대만총채벌레는 빨강, 노랑, 파랑, 볼록총채벌레는 파랑, 노랑, 빨강 순으로 유인효과가 높은 것을 확인하였다.

Structural cuticular proteins (CPs) and the liner polysaccharide, chitin, are the primary components of insect cuticle or exoskeleton. A large number of insect CP family proteins are divided into several distinct subfamilies defined by the presence of specific amino acid sequence motifs. One of these subfamilies is composed of Cuticular Protein Analogous to Peritrophins (CPAPs), containing one (CPAP1s) or three (CPAP3s) type-2 chitin-binding domains. In this study, we report a novel function of TcCPAP1-C from Tribolium castaneum in movement of legs. RNAi for TcCPAP1-C at larval stage has no effect on insect molting, growth and development. However, the resulting adults exhibit impaired leg movement, in which internal tendon cuticles are ruptured near the femur-tibia joint. The exoskeletal cuticle, hemiadherens junctions, microtubule array, myotendinous junctions and muscle fibers exhibit normal morphology before the tendon breakage. These results indicate functional specialization of TcCPAP1-C in structural integrity of the internal tendon cuticle, and loss of function of TcCPAP1-C caused breakage of the tendon cuticle, resulting in defective limb movement and locomotion.

From an evolutionary perspective, it is speculated that termites have evolved to construct tunnels in a manner that optimizes search and transport efficiency. While numerous studies have focused on search efficiency, there has been limited research on transport efficiency due to the challenges associated with direct field observations. To address this challenge, we developed an individual-based model to simulate the transport process. Using the model, we examine the effects of several key variables on transport efficiency, Based on our results, we discuss potential strategies that termites might employ to optimize transport efficiency. In addition, we briefly discuss ways to improve the realism of the model.

The choice of suitable companion plants is crucial for enhancing pest management strategies in agricultural fields. Riptortus pedestris, an important agricultural pest, has drawn attention for its serious damage on soybean. To identify an ideal companion plant for soybean, we investigated the pest’s behavioral patterns when exposed to corn seedlings in laboratory. Series of choice experiments were conducted for 4th instar nymphs and unmated female adults of R. pedestris when presented with corn and/or soybean pot against soybean or blank pot. In 4th instar nymphs, 56% preferred the treatment of corn pot plus soybean pot over soybean alone pot while 69% of unmated female adults preferred the same combination. These findings provide valuable insights into the behavior of this insect pest, which could be beneficial for establishing polycultures in agricultural fields.

In this study, the second-order Nomoto’s nonlinear expansion model was implemented as a Tagaki-Sugeno fuzzy model based on the heading angular velocity to design the automatic steering system of a ship considering nonlinear elements. A Tagaki-Sugeno fuzzy PID controller was designed using the applied fuzzy membership functions from the Tagaki-Sugeno fuzzy model. The linear models and fuzzy membership functions of each operating point of a given nonlinear expansion model were simultaneously tuned using a genetic algorithm. It was confirmed that the implemented Tagaki-Sugeno fuzzy model could accurately describe the given nonlinear expansion model through the Zig-Zag experiment. The optimal parameters of the sub-PID controller for each operating point of the Tagaki-Sugeno fuzzy model were searched using a genetic algorithm. The evaluation function for searching the optimal parameters considered the route extension due to course deviation and the resistance component of the ship by steering. By adding a penalty function to the evaluation function, the performance of the automatic steering system of the ship could be evaluated to track the set course without overshooting when changing the course. It was confirmed that the sub-PID controller for each operating point followed the set course to minimize the evaluation function without overshoot when changing the course. The outputs of the tuned sub-PID controllers were combined in a weighted average method using the membership functions of the Tagaki-Sugeno fuzzy model. The proposed Tagaki-Sugeno fuzzy PID controller was applied to the second-order Nomoto’s nonlinear expansion model. As a result of examining the transient response characteristics for the set course change, it was confirmed that the set course tracking was satisfactorily performed.

T.S. 엘리엇은 전혀 새로운 시인으로서 20세기 영미시에서 우리가 전혀 본적이 없는 시를 쓴 시인이다. 그러나, 그는 유럽, 특히 프랑스 시의 전통에 확고한 뿌리를 둔 시인이다. 반면, W.B. 예이츠는 자신이 상징이라고 정의한 시의 특성을 추구한 시인으로 영시나 아일랜드 시에서 금세기에서 조차 어떤 시인도 그를 능가하지 못하고 있다. 이 글은 엘리엇에 영향을 준 프랑스 시인에 대해 이야기 한다. 엘리엇은 프랑스의 새로운 시인들과 접촉하게 되어 독특한 시를 쓰게 된 것은 명확한 것 같다. 엘리엇은 시인 코르비에르에게서 프랑스 시인들이 무시하고 가치를 보지 못한, 프랑스 시의 전혀 새로운 면을 볼 수 있었다. 이 글은 구하의 책에서 프랑스 시의 영향을 다룬다. 특히 트리스탄 코르비에르의 엘리엇에 대한 영향을 논하다. 코르비에르는 당시 프랑스에서 전혀 관심을 끌지 못한 무명시인이었다. 엘리엇은 이 시인에게서 새로운 것을 발견할 수 있었고 그것을 자신의 시에 잘 사용하였다. 구하는 이점을 다룬다. 반면 예이츠는 불어시를 읽을 수 없었고 프랑스 시에 큰 영향을 받지 않은 것 같다. 예이츠는 그의 산문에서 엘리엇의 새로움과 위대함을 지적한다.

도와 일본의 미학은 예술적 적합성에서 유사한 미적 보편성을 나타내며 표현 방식이 다를 뿐이다. 인도와 일본 미학의 예술적 목적은 덕목, 즉 어둠에서 빛으로 나아가는 것이다. 예술의 미적 감상은 인도의 미학이 브라만의 직관적인 빛을 드러내는 동양의 텍스트적 행복에 초점을 맞춘다면, 일본의 미학은 공의 신비한 그림자를 찬미한다. 절대의식의 형태로 동양적 주체성을 이해하는 방식에 있어서, 브라만은 절대적인 통일성을 추구하는 반면, 공은 허무주의적이지 않으며 종종 오해되는 불합리한 생각도 아니다. 그것의 실현은 예술에 대한 인식에서 통일성, 연속성, 조화 및 마음 챙김을 발생한다. 동양적 관점은 형태와 무형태의 초월적 의식에 의해 한계를 지니는데, 이것은 아름다움을 찬미하고 지각하는 가운데 명상한다. 이 논문은 T.S. 엘리엇과 W.B. 예이츠의 시를 통해 그들의 예술이 어떻게 빛과 그림자의 미학을 드러내며 동양의 철학적 의미를 창의적으로 반영하는지, 그리고 그들의 시가 어떻게 초월적이고 세속적인 속성으로 열반에 도달하는지 탐구한다.

This study studied the characteristics of cultured oyster marketing in Sacheon Bay. The results of this study are summarized as follows. First, the GULDAE aquaculture is a unique production method of Sacheon Bay. Second, oysters in Sacheon Bay were low in production, but the price was more than 70% higher than in other producing areas. Third, profit is 12.5% higher and rate of return was 179.8%. Fourth, there were more out-of-market sales than other than other producing areas, and it is a bidding method. Fifth, the marketing cost was higher than the longline hanging aquaculture; however, the advantage of price offseted this point. Although the Sacheon Bay Oyster aquaculture is small, it was confirmed that it was a producing area with high profitability and a unique marketing form from other regions. Although the Sacheon Bay Oyster culture is small, it has been confirmed that it is a producing area with high profitability and shows a unique distribution form.

This paper analyzed the price stabilization before and after the fisheries outlook project for seaweed, flatfish, and abalone. First, the stabilization effect was analyzed through the price variation coefficient before and after the observation project. In terms of the variation coefficient, there was no effect that the price was stabilized through the seaweed outlook project. However, it can be seen that flatfish and abalone have a price-stabilizing effect. Second, as a result of analyzing the price stabilization effect through the improved ARMA-T-GARCH model, it was confirmed that seaweed was not statistically significant while flatfish and abalone had a price stabilization effect by statistically significantly reducing volatility of real prices after the introduction of the fisheries outlook project. Third, as a result of analyzing the factors affecting price stability, it was found that the price of seaweed was stabilized after the WTO, but the Japanese earthquake expanded the price volatility. In the case of flatfish, it was analyzed that the price stabilized after the WTO and the Great Japanese Earthquake. Finally, the price of abalone has stabilized since the WTO and the Great Japanese Earthquake.

2000년부터 시작된 6·25 전사자 유해발굴사업은 전쟁 기간 동안 수 습되지 못한 전사자 13만여 분을 찾아 국가와 가족의 품으로 모신다는 데 목적을 두고 추진 중이다. 2005년부터 국방부 유해발굴감식단(이하 국유단)을 출범하여 유전자 채취와 신원확인센터 설치 등 체계적 및 전문적으로 추진하고 있는 영구적인 국가정책 사업이다. 아울러 2018 년 4·27 판문점 선언과 9.19 남북군사합의에 의해서 오랜 숙원 사업으 로 제기됐던 비무장지역(DMZ) 내 유해발굴이 가능해졌다. 오랜 기간 접근하지 못했던 DMZ 내에서 남북유해발굴 공동합의는 접경지역과 한 반도에서의 군사적 긴장완화에 대한 남북한의 의지를 잘 반영한 것이 다. 기대했던 북한의 약속 이행은 없었지만 국방부는 2019년 4월 1일 부터 2021년 6월 24일까지 약 2년 반 동안 “9·19 남북군사합의”에 명 시된 남북공동유해발굴의 사전준비 차원에서 화살머리고지 일대 남쪽 지역에서 유해발굴을 꾸준히 진행했다. 특히 DMZ 내 화살머리고지 유 해발굴을 통해 9명의 국군전사자의 신원을 확인하여 유해봉환 및 안장 식을 거행했다. 이런 맥락에서 이 논문은 6·25 전사자 유해발굴사업의 의미와 중요성, 체계 수립을 위해서 “활동이론”(Activity theory)을 근 간으로 세부적으로 분석했다. 이를 기반으로 이 논문에서는 한반도의 지속 가능한 평화와 유지와 인도주의 차원에서의 최초의 DMZ 내 남북 공동유해발굴사업의 추진 배경과 성과, 그리고 의의를 중심으로 유해발 굴사업의 중요성과 함의에 대해 고찰했다.

For the selective catalytic reduction of NOx with ammonia (NH3-SCR), a V2O5WO3/TiO2 (VW/nTi) catalyst was prepared using V2O5 and WO3 on a nanodispersed TiO2 (nTi) support by simple impregnation process. The nTi support was dispersed for 0~3 hrs under controlled bead-milling in ethanol. The average particle size (D50) of nTi was reduced from 582 nm to 93 nm depending on the milling time. The NOx activity of these catalysts with maximum temperature shift was influenced by the dispersion of the TiO2. For the V0.5W2/nTi-0h catalyst, prepared with 582 nm nTi-0h before milling, the decomposition temperature with over 94 % NOx conversion had a narrow temperature window, within the range of 365-391 °C. Similarly, the V0.5W2/nTi-2h catalyst, prepared with 107 nm nTi-2h bead-milled for 2hrs, showed a broad temperature window in the range of 358~450 °C. However, the V0.5W2/Ti catalyst (D50 = 2.4 μm, aqueous, without milling) was observed at 325-385 °C. Our results could pave the way for the production of effective NOx decomposition catalysts with a higher temperature range. This approach is also better at facilitating the dispersion on the support material. NH3-TPD, H2-TPR, FT-IR, and XPS were used to investigate the role of nTi in the DeNOx catalyst.

We explored the frequency response of krill target strength (TS) to understand the Antarctic krill (Euphausia superba) and ice krill (Euphausia crystallorophias) using the stochastic distorted-wave Born approximation (SDWBA) model. The results showed that the distribution of orientation and the fatness factor could significantly impact on the frequency response of TS. Krill TS is clearly depended on acoustic properties, which could affect to estimate the biomass of two krill species. The results provide insight into the importance of understanding TS variation to estimate the Antarctic krill and ice krill biomass, and their ecology related to the environmental features in the Southern Ocean.

Korean tuna purse seine fishery in the Western and Central Pacific Ocean (WCPO) began to operate in earnest in the early 1980s. Since then, the total catch has shown an increasing trend and the target species are skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacare) and bigeye tuna (Thunnus obesus). Based on the operational data of Korean tuna purse seine fishery from 2016 to 2020, the catch rates of target species (skipjack and yellowfin tunas) were analyzed by operation time for set types (free school and FAD sets). In the case of the free school sets, they were usually made from sunrise to sunset, and the catch rate was high before and after sunrise for skipjack tuna and before sunset for yellowfin tuna. On the other hand, for the FAD sets, more than 90% of them were made just before sunrise, and there were few operations during the daytime. The purpose of this study is to examine whether there are differences in the catch rate of skipjack and yellowfin tunas by operation time and by school type for Korean tuna purse seine fishery in the WCPO, which could be helpful in understanding its fishing characteristics and providing useful information for developing the stock indices of the target species.

Giant pacific octopus, Enteroctopus dofleini, is a large mollusk distributed in the East Sea of Korea. In this study, the catch status of giant pacific octopus by drift line fishery and the effect of sea temperature on fishing ground were investigated in Goseong-gun, Gangwon-do, which is the central coast of the East Sea. The average catch of giant pacific octopus in Gangwon-do was 1,570 tons over the past ten years, and it accounted for 21% in 2008 and 44% in 2021 compared to the total catch in the East Sea during the same period. Such data indicates that the catch in Gangwon-do has recently increased. In this study area, giant pacific octopus weighing 1.1-5.0 kg dominated accounting for 56% of the total individuals, and followed by those weighing 1 kg or less. However, the ratio of catch of giant pacific octopus over 5.1 kg tended to increase in 2021, which is thought to be related to the sea temperature that affected the fishing ground. The main depth of fishing ground was from 21 m to 50 m in this area and fishing grounds were widely distributed throughout the season except summer. Fishing ground was formed with the conditions of bottom sea temperature under 10℃ and was diminished by moving of giant pacific octopus to deeper depth with conditions of bottom sea temperature over 18℃.