• 한국컴퓨터정보학회논문지
• /
• 제28권11호
• /
• pp.13-20
• /
• 2023

본 논문에서는 LSTM-Autoencoder 기반 특징추출과 재구성 데이터를 이용한 수온 예측 방법을 제안한다. 냉수대 현상이 발생한 동해 낙산 지역의 해수면 수온과 수온에 영향을 미치는 풍향, 풍속 등 다변량 시계열 데이터를 이용하고, LSTM-Autoencoder 모델을 이용하여, 원본 데이터의 차원 축소를 통해 추출된 특징 데이터를 원본 데이터의 다변수 데이터로 결합한 데이터, 복원 데이터, 원본 데이터 총 3가지를 사용한다. 수온 예측을 위해 LSTM 모델에 3가지 데이터를 학습하고, 정확도를 평가한 결과 MAE 0.3652, RMSE 0.5604, MAPE 3.309%으로 LSTM-Autoencoder의 특징추출을 이용한 수온 예측 정확도가 가장 우수한 성능을 보이는 것을 확인하였다. 본 연구의 결과는 냉수대와 같이 해수면 수온 변화가 급변하는 구간의 예측 정확도를 높여, 자연재해의 피해를 예방할 수 있을 것으로 기대한다.

• 문화기술의 융합
• /
• 제9권1호
• /
• pp.725-733
• /
• 2023

천연물 16종의 물 추출물 및 50% 에탄올 추출물들에 대한 기능성 활성성분 및 면포 염착효과를 알아본 결과, 색도 강도는 차이가 있었으나 적색 6종, 황색 5종, 오렌지색 2종 및 녹색 3종 이었고, 대체로 50% 에탄올 추출액의 색도가 높고 선명하였다. 이와 같은 천연물들의 물 추출물 및 50% 에탄올 추출물에 면포 거즈를 2일간 침지하여 염색한 결과 염색효과는 대체로 양호하였으며, 실온에서 건조 후 개봉하여 보관하여도 색도의 퇴색 감소는 거의 없는 것으로 관찰되었다. 천연물 16종의 물추출물의 pH는 중성 내지는 약산성으로 피부에 부작용이 없는 중성~약산성 범위였다. DPPH 유리라디칼 억제 항산화효과는 시료 별로 50% 에탄올 추출물의 효과가 물추출물에 비하여 양호하였고, 특히 황금, 유백피, 유근피, 박하, 홍화 등의 효과가 양호하였다. 폴리페놀 함량도 대체로 50% 에탄올 추출물의 함량이 물 추출물에 비하여 높은 경향이었고, 특히 금은화, 유근피, 황금, 유백피, 홍화 등의 효과가 양호하였다. 따라서 천연물 16종 추출물에 대한 항산화 활성과 여성질염 예방의 상관 관계를 규명하고자 하였다.

• 한국세라믹학회지
• /
• 제27권1호
• /
• pp.86-90
• /
• 1990

The shape and characteristics of polymers in hydrolzed and polymerized sol were affected by the types of catalysts. In our research, the contents of water and catalysts were constant and the types of catalyst were varied. In the case of acid catalysts, polymers in sol were linear and spinnable. The shapes of polymer were affected by the types of anions in acid catalysts. In the case of catalyst having anions, F, Cl, in the same period, the effects were similar. But in the case of base catalysts polymers were rigid rod like and not spinnable.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 1998년도 가을 학술발표대회 논문집(III)
• /
• pp.877-882
• /
• 1998

Concrete structure placed in marine environment is subject to many different types of potential attack. Therefore the sea water resistance of cement and concrete must be considered when it is used for structure in the ocean. For this purpose, this study was peformed to investigate the properties of several types of cements for a massive concrete placed in marine environment.

• Asian-Australasian Journal of Animal Sciences
• /
• 제20권11호
• /
• pp.1754-1760
• /
• 2007

This study was conducted to determine the effects of dietary glycine betaine on pork quality in different muscle types. A total of 80 female pigs ($Landrace{\times}Yorkshire{\times}Duroc$) were randomly allotted into one of four experimental diet groups. Each group of pigs were fed a commercial diet (Control) with 0.2 g glycine betaine (T1), 0.4 g glycine betaine (T2) and 0.6 g% glycine betaine (T3)/kg for 40 days. pH of belly was significantly higher in the control than dietary glycine betaine groups at 13 days of storage, whereas pH of picnic shoulder and ham were significantly lower in control than glycine betaine groups. At 13 days of storage, redness (a*) of belly was significantly higher in control than dietary glycine betaine groups, whereas picnic shoulder and ham were significantly higher in glycine betaine groups than in the control. Water-holding capacities (WHC) of all muscle samples were significantly higher in the control than glycine betaine groups until 5 days of storage. Sarcomere length was significantly longer in the control than glycine betaine groups. The thiobarbituric acid reactive substances (TBARS) value of belly was much higher than other muscle types at 13 days of storage. In fatty acid composition, dietary glycine betaine increased the ratio of saturated fatty acids (SFA) and decreased unsaturated fatty acids (USFA) in loins.

• 한국주거학회논문집
• /
• 제24권5호
• /
• pp.1-8
• /
• 2013

Recently, as people have more interest in health, and some change takes place in their lifestyles, a demand for environment-friendly residential space is also increasing. Research on the introduction of natural elements is mostly conducted for humans to pursue a more pleasant and comfortable life in residential space since it has one of the closest relation with humans. Therefore, it is such an important assignment at present when environmental problems are considered significant. Based on such a necessity, this study analyzed the introduction types and characteristics of natural elements in residential space by considering essential and psychological aspects more than previous researches on residential space with practical and functional aspects. As natural elements, this study put limits on plants and water that are used a lot in the interior space, and by dividing introduction types into recomposition of courtyard space, spatial partition and decorative elements, this study carried out a case analysis of residential space structures recently completed in Japan. As a basic research on space planning that is desperately required by change in the residential life paradigm and on the basis of understanding about nature, it is expected that the results of this study will be used as design basic data useful when establishing plans of introducing natural elements for residential space in the future.

• 한국초지조사료학회지
• /
• 제16권4호
• /
• pp.267-274
• /
• 1996

This experiment was carried out to investigate the effect of pasture types(mixture and mono tall fescue pasture) and endophyte infection on the animal behavior of Korean native cattle at the Experimental Field of Grassland and Forage Crops Division, National Livestock Research Institute, Suweon, in 1994. The results obtained are sumunarized as follows: DM intake of Korean native cattle was increased with mixture and endophyte-free tall fescue for both pasture types. Mixture and endophyte-free tall fescue showed good animal preference. Daily grazing time was increased with mixture and endophyte-free tall fescue in monoculture, while annual grazing period was increased with monoculture and endophyte-infect tall fescue. Amount of drinking water of Korean native cattle was increased with tall fescue monoculture rather than mixture, however the amount of drinking water was higher with endophyte-infect tall fescue in monoculture. Salt intake of Korean native cattle was increased with mixture and endophyte-6ee tall fescue in monoculture. Rectal temperature of Korean native cattle was not influenced by pasture types and endophyte infection. Based on the results of this experiment, DM intake of Korean native cattle and daily grazing time were increased by mixture and endophyte-free tall fescue with good quality.

• 태양에너지
• /
• 제18권3호
• /
• pp.71-80
• /
• 1998

In thermal energy storage system, energy collected from many types of heat source is stored in a storage tank and then supply to load for demand. Lately, practical use of thermal energy storage system and attention to essential use of energy have been increased. From this point of view, especially, a study about the energy extraction process from a storage tank is necessary. So in this study, useful rate of hot water and hot water extraction efficiency was analysed respect to dynamic and geometric parameters dominating the hot water extraction process.

• 지구물리
• /
• 제6권2호
• /
• pp.49-56
• /
• 2003

Under the attack of storm waves, there are many destructions of coastal structures in the forms of sinking and sliding. There types of destructions will be in close relation to the dynamic behavior of sand bed around the structures. Form this point of view, in this pear, we investigate the characteristics of the pore water pressure and effective stresses in the highly saturated sand bed under oscillating water pressure theoretically. The results indicate that the oscillating water pressure induce the notable drop of strength of and bed around the structure under certain condition.

• 한국생물물리학회:학술대회논문집
• /
• 한국생물물리학회 1999년도 학술발표회 진행표 및 논문초록
• /
• pp.28-28
• /
• 1999

The movement of water across cell plasma membranes occurs in all cell types but is particularly rapid in erythrocytes, renal tubular cells. In principle, osmotic/oncotic gradients and hydrostatic pressure difference can drive water across a cell layer by transcellular or paracellular pathways. The aquaporin family of molecular water channels, which now number 10 in mammals and many more in plants and lower organism, are likely to provide a molecular pathway for water transport in some cell membranes.(omitted)