청정 연료인 수소를 생산하기 위해 현재 가장 널리 사용되는 기술인 증기 개질이다. 이 방법으로 생산된 수소는 일산화탄소와 같은 불순물을 함유하고 있어, 이를 연료전지와 같은 응용분야에 사용하기 위해서는 적절한 정제 과정을 반드 시 거쳐야 한다. 최근 효과적인 정제 방법으로 분리막 기술이 각광받고 있다. 본 연구에서는 수소와 일산화탄소 혼합가스에서 수소 분리 및 회수를 위해 바이오가스 고질화용(biogas upgrading) 상용 폴리설폰(polysulfone) 고분자막의 활용 가능성에 대 해서 평가하였다. 먼저, 사용한 상용막의 물리화학적 특성에 대해서 평가하였고, H2/CO를 이용하여 stage-cut, 운전압력과 같 은 다양한 조건에서의 상용막 모듈의 성능 평가를 진행하였다. 마지막으로, 평가 결과를 바탕으로 공정설계를 위한 시뮬레이 션을 진행하였다. 본 연구에서의 상용 분리막 공정의 최대 H2 투과도와 H2/CO 분리계수는 각각 361 GPU와 20.6을 기록하였 다. 또한, CO 제거 효율은 최대 94%를 나타내었으며, 생산 수소 농도는 최대 99.1%를 달성하였다.

Maintaining sea superiority through successful mission accomplishments of warships is being proved to be an important factor of winning a war, as in the Ukraine-Russia war. in order to ensure the ability of a warship to perform its duties, the survivability of the warship must be strengthened. In particular, among the survivability factors, vulnerability is closely related to a damage assessment, and these vulnerability data are used as basic data to measure the mission capability. The warship's mission capability is usually measured using a wargame model, but only the operational effects of a macroscopic view are measured with a theater level resolution. In order to analyze the effectiveness and efficiency of a weapon system in the context of advanced weapon systems and equipments, a warship's mission capability must be measured at the engagement level resolution. To this end, not the relationship between the displacement tonnage and the weight of warheads applied in the theater level model, but an engagement level resolution vulnerability assessment method that can specify physical and functional damage at the hit position should be applied. This study proposes a method of measuring a warship’s mission capability by applying the warship vulnerability assessment method to the naval engagement level analysis model. The result can be used as basic data in developing engagement algorithms for effective and efficient operation tactics to be implemented from a single unit weapon system to multiple warships.

Korea depends almost entirely on imports for malt, the main ingredient in beer. However, the consumer market for domestic malt has not developed in Korea because of the prejudice that the quality of domestic malt is inferior to that of imported malt. This study aimed to analyze the quality of malt from Gwangmaeg (GM) and Hopum (HP), representative domestic beer barley varieties cultivated under varying nitrogen fertilizer application rates (standard fertilizer application, 50% increase in application, and 50% decrease in application), and use the findings as primary data to promote domestic malt consumption. GM’s crude protein and starch contents were significantly (Ρ<0.05) higher and lower, respectively, than those in HP. With decreased fertilizer application (GM: 14.0±0.8% and HP: 11.4±0.4%), the protein content was significantly lower than that with increased fertilizer application (GM: 15.5± 0.3% and HP: 13.1±1.3%). Although there was no difference in -glucan content, starch content tended to increase, indicating quality improvement. Acrospire length, yield, and enzyme titer, quality indicators of malt, increased with further fertilizer application, whereas friability and Kolbach index increased with decreased fertilizer application. For wort qualities, filtration time decreased from 36 to 34 minutes in GM and 55 to 42 minutes in HP, with the wort extraction rate increasing with decreased fertilizer application. These findings showed that decreased nitrogen fertilizer application improves the qualities of malt and wort.

The Pacific giant octopus (Enteroctopus dofleini) is one of the most important species in the East Sea fishery of Korea. The annual production of Pacific giant octopus in 2021 was 3,880 metric ton between Gangwon province and Gyeongsangbuk province. Most of the fishing gears for the octopus fishery were based on behavioral properties such as thigmotaxis and chemotaxis. Wooden octopus box is also one of the fishing gears, which is application of thigmotaxis for the octopus capture in fishing industry. In this study, the tank experiments were designed to examine the behaviour and the effect of surface roughness to the infiltration of the octopus quantitatively. Three different types of octopus boxes were used for the experiments with different surface roughness on the average of 701.6 ㎛, 141.7 ㎛ and 2.09 ㎛ for each gear. 22 trials were conducted from June to September 2021. The normality of the experiments was tested using Shapiro-Wilk normality test (p-value < 0.05). The significance of results was conducted by Kruskal-Wallis rank sum test (Chi-squarded = 21, Degree of freedom = 3, p-value < 0.05). The use of wooden octopus box with rough surface was found to enhance the catch efficiency and observe infiltration behaviour of the octopus frequently.

장미의 단일 마디 삽목의 경우 온도, 상대 습도 및 광과 같은 환경 관리가 생산성에 영향을 미친다. 기온과 상대습도가 삽 목 성공률과 묘 소질에 미치는 영향을 조사하기 위해 장미 (Rosa hybrida) ‘Maisie’ 품종과 투명한 플라스틱 박스를 이 용하였으며 인공조명(white LED, PPFD 104.0μmol·m-2·s-1) 을 이용하여 전 기간 밀폐 조건에서 삽목 시 가장 효과적인 소 엽수와 광주기 조건을 구명하고자 하였다. 첫 번째 실험은 밀 폐 기간을 달리하여 총 6주 동안 진행되었다. 밀폐 기간이 길 어질수록 뿌리수와 가장 긴 뿌리의 길이가 감소하였다. 그러 나 밀폐 기간에 따른 생존율, 신초발생률, 발근율에 유의한 차 이가 없었다. 두 번째 실험에서는 삽수 생존율과 신초발생률 이 광주기(0/24, 2/22, 4/20, 8/16, 16/8h)와 삽수 소엽의 개수 (0, 2, 4)에 의해 영향을 받는 것으로 나타났다. 생존율은 명기 16시간, 소엽 4개 처리구에서 가장 높았다. 생존율과 신초발 생률을 에너지 효율과 함께 고려한 결과, 소엽을 2개 또는 4개 붙인 삽수를 이용하여 하루 8시간 광을 조사하는 것이 가장 효 과적인 것으로 판단되었다.

In this study, the fishery status of the octopus pot fishery in the east coastal sea were investigated, and the fishing performance of each pot shape was compared and analyzed. The fishery status survey was conducted through listening surveys at Jukbyeon Port, Uljin Port and Pohang Daebo Port in Gyeongbuk Province, and the amount of fishing gear used, fishing method, size and loss of octopus pot fishery was investigated. On the east coastal sea, octopus is one of the commercially important fish stocks and is caught in inshore pots, inshore combos, inshore gillnets and offshore pots. Among these fishing methods, pot fishing yields the highest catch. The shape of the pot differs depending on the region. In Uljin (Jukbyeon Port and Hupo Port), Gyeongbuk, rectangular type net pots are mainly used, and in Pohang (Daebo Port) in Gyeongbuk, drum-type pots are mostly used. Enteroctopus dofleini accounts for more than 90% of the catch of octopus. For the octopus fishing performance test by trap type, three types of traps (rectangular pot, drum pot and cylinder pot) were used on the coastal sea of Pohang Daebo. As a result, the total catch by pot shape was shown in the order of rectangular-type pot > drum-type pot > cylinder-type pot. The catch of octopus, the target species, was in the following order: rectangular-type pot > drum-type pot > cylinder-type pot. Such result shows a significant difference (Mann-Whitney test, p<0.05).

Traditional wooden buildings deform over time and are vulnerable to fire or earthquakes. Therefore, traditional wooden buildings require continuous management and repair, and securing architectural drawings is essential for repair and restoration. Unlike modernized CAD drawings, traditional wooden building drawings scan and store hand-drawn drawings, and in this process, many noise is included due to damage to the drawing itself. These drawings are digitized, but their utilization is poor due to noise. Difficulties in systematic management of traditional wooden buildings are increasing. Noise removal by existing algorithms has limited drawings that can be applied according to noise characteristics and the performance is not uniform. This study presents deep artificial neural network based noised reduction for architectural drawings. Front/side elevation drawings, floor plans, detail drawings of Korean wooden treasure buildings were considered. First, the noise properties of the architectural drawings were learned with both a cycle generative model and heuristic image fusion methods. Consequently, a noise reduction network was trained through supervised learning using training sets prepared using the noise models. The proposed method provided effective removal of noise without deteriorating fine lines in the architectural drawings and it showed good performance for various noise types.

2019년에 서남해안 지역인 고창군의 옥수수 밭 주변에서 성페로몬을 이용하여 열대거세미나방(Spodoptera frugiperda) 성충을 효과적으로 모니터 링하는 방법을 조사하였다. 총 함량이 300 또는 1000 ㎍인 2종류 성분 조성의 성페로몬 미끼[(100%) (Z)-9-tetradecenyl acetate and (2%) (Z)-7-dodecenyl acetate]를 설치한 깔대기형 트랩과 델타형 트랩 중에서 열대거세미나방은 300 ㎍ 미끼의 깔대기형 트랩에서 8월 6일에 처음 잡혔고 가장 많이 포획되었다. 또한 깔대기형 트랩 모두에서 비표적 종인 뒷흰가는줄무늬밤나방(Mythimna loreyi)이 많이 포획되었다. 총 함량이 1000 ㎍인 위의 2종류 성분 조성과 4종류 성분 조성의 미끼[(100%) (Z)-9-tetradecenyl acetate, (8%) (Z)-11-hexadecenyl acetate, (2%) (Z)-7-dodecenyl acetate, and (1%) (Z)-9-dodecenyl acetate]를 설치한 날개형 트랩에서 열대거세미나방은 비슷한 수준의 낮은 포획수를 보였으나 뒷흰가는줄무늬밤나방은 4종류 성분 조성의 미끼에서 훨씬 더 많이 포획되었다. 성페로몬 트랩에 포획된 열대거세미나방 70마리의 미토콘드리아 시토크롬 옥시다제 1(CO1)의 부분 염기서열(1,004 bp)을 이용하여 계통수를 분석한 결과, 두 개의 종내 변이군으로 나눠졌으며 66마리가 CO1-RS로, 나머지 4마리는 CO1-CS로 분지되었다. 또한 두 개의 CO1 변이군과 기주식물계통(벼, 옥수수)에서 일관되게 차이가 있는 총 12개의 CO1 단일염기다형성(SNP)이 확인되었으며, 전체 73마리 중 4마리만 CO1-CS 그룹(옥수수계통 포함)과 동일한 패턴을 보였으며 나머지 69마리는 CO1-RS그룹(벼계통 포함)과 같았다.

Juvenile xanthogranuloma (JXG) is a benign histiocytosis that occurs in the pediatric population. Cutaneous JXG is the most common form, while extracutaneous lesions, including oral JXG, is extremely rare. Cutaneous JXG can occur as multiple lesions and may have systemic visceral involvement, but this is not seen in oral JXG. In this case, we report a solitary oral JXG at the gingiva in a 3-year old male.

축전식 탈염(capacitive deionization)에 이용할 수 있는 폴리페닐렌 옥사이드(PPO) 음이온 교환막의 가교결합에 대해 조사하였다. 브롬화와 아민화 반응단계를 거쳐 PPO 음이온 교환 고분자를 제조하고 비스페놀 A 디글리시딜에테르 (BADGE), m-페닐렌디아민(m-PDA), 헥사메틸렌디아민(HMDA) 등으로 가교하였다. 가교에 따른 겔화되는 시간은 HMDA > m-PDA > BADGE 순으로 짧았으며, 일정한 함량 이상으로 실온에서 가교하면 1-메틸피롤리돈(NMP)과 같은 비양성자성 용매(aprotic solvent)에 녹지 않아 내화학성이 증대되었다. 가교제(BADGE) 함량에 따른 음이온 교환막의 이온 교환 용량과 함 수율을 측정하고 비교하였다. HMDA 용액에 침적하여 표면 가교한 PPO 음이온 교환막을 축전식 탈염에 적용한 결과 그 탈염 성능은 가교하지 않은 막과 비교하여 흡착단계의 초기 부분을 제외하고 거의 차이가 없었다.