• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.5-14
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• 2001

각종 섬유소재 중 흡한 흡수성이 우수한 100％ 면과 폴리에스테르 섬유를 이용하여 본 과제의 목표에 부합되는 최적의 제직, 제편 조직을 설정, 생산하여 상품화하였으며, 그 내용은 아래와 같다. (1) 흡한, 속건성 직물개발 : 직물의 구성인자(실의 번수, 밀도, 중량, 두께)에 따른 흡수성, 속건성을 검토하여 용도별 직물의 설계조건을 제시하였다. (2) 고흡한, 속건성의 2층 구조 편성물 개발 : 편성물의 구조를 피부측은 흡수하기 쉽고, 외측은 수분을 외부로 발산하기 쉽도록 2층 구조의 편성물을 제조하였다.

• Journal of the Korean Magnetics Society
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• v.2 no.2
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• pp.105-113
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• 1992

조성이 Mn$_{x}$Zn$_{1-x}$ Fe$_{2}$O$_{4}$ 훼라이트(x=0.75, 0.52)를 pusher type 연속 전기로를 이용하여 질소 분위기하에서 1360 .deg. C 로 3시간 동안 소결하여 얻어냈다. 본 연구에서는 스피넬 구조인 Mn-Zn 훼라이트의 FMR(Ferrimagnetic Resonance) 스펙트럼 특징과 초기투자율과의 상관성을 조사하고자 EPR X-band 스펙 트로미터를 이용 9.50 GHz의 microwave frequency에서 FMR 실험을 수행하였다. FMR 공명흡수선은 주 자기공명 흡 수선외에 낮은 자기장에서 약한 subsidiary 공명흡수선을 나타내는데 온도변화에 따른 주 자기공명 흡수선과 sub- sidiary 공명흡수선(제2, 제3 공명흡수선)의 세기, 공명선폭, g값 등의 온도 의존성을 연구함으로써 제2 공명흡수 선이 나타나는 원인을 분석하였으며, 자기공명 흡수선의 g값, 자기공명선 세기, 그리고 공명선폭과 초기투자율의 상관성을 연구하였다. 실험 결과 주 자기공명 흡수선의 g값, 자기공명선 세기, 공명선폭은 초기투자율 값과 밀접 한 관련이 있음을 확인할 수 있었다.었다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.24 no.4
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• pp.1-11
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• 1979

Increased nitrogen fertilization increased root respiration and top dry weight of rice plant, and increased phosphorus fertilization increased root respiration only with the same amount of nitrogen applied. The effect of phosphorus on root respiration under low growth temperature was not significant and the large application of phosphorus alone decreased root respiration greatly. Root respiration per unit root weight correlated highly with top dry weight and nutrient uptake.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05b
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• pp.318-323
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• 1998

사용 후 핵연료 수송용기의 충돌사고에 대한 안전성은 층격완충체의 층격흡수특성에 지배되며, 충격완충체의 충격홉수특성은 외부의 케이스와 내부 격막판 둥의 철제 구조물과 내부에 삽입된 충격흡수재의 변형특성에 지배를 받는다. 충격흡수재를 감싸주는 철제 케이스와 내부 격막판의 용접 접합부는 일부 부분이 제작공정상 부득이 부분용접의 접합형태를 갖기 때문에 판재나 완전 접된 부분에 비해 강도가 약해 충돌사고시 취약부위가 파단된다. 이러한 케이스 용접부의 파단은 충격완충체의 변형특성을 변화시켜 충격흡수거동이 달라지는 원인이 된다. 따라서, 본 연구에서는 용접 접합부의 강도특성을 수송용기의 자유낙하 충돌해석에 적용할 수 있는 해석모델을 구성하고 부분용접된 접합부의 파단강도가 수송용기의 충돌거동에 미치는 영향을 분석하였다.

• Journal of Korean Society for Geospatial Information Science
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• v.21 no.4
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• pp.29-35
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• 2013

Generally, Calculation of carbon dioxide absorption in the forest area is calculated using the information of the forest, such as tree height and DBH(Diameter of Breast Height). Tree height and DBH of these are obtained using the remote sensing data such as imagery and information of local forest survey. However, Mixed forest with a high proportion of field survey to lower the accuracy of forest information. In this study, vertical structure of the tree were identified by applying region growing method based on the slope using LiDAR data and height and number of the tree were identified by applying extracting top of the tree algorithm. Through the vertex tree extraction algorithm to identify height of tree and the number of individuals, substitute this for the DBH relation formula which is drawn from data through field surveys. In this, a quantitative calculation of carbon dioxide absorption were able to calculate the basic data. Also, carbon dioxide absorption of three type trees were calculated and average per unit area of carbon dioxide absorption were able to estimate.

• Journal of the Korean Electrochemical Society
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• v.1 no.1
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• pp.55-59
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• 1998

The water absorption in protective coatings, which may greatly influence the durability of these coatings, was studied using quartz crystal microbalance and electrochemical impedance technique. The water absorption in protective coatings and the change of coating capacitance with concentration of electrolyte were measured. The water absorption in coatings seems to be driven by osmotic pressure, and larger amount of water was absorbed in thinner coatings at initial stage of absorption. The amount of water absorbed in coatings changed with the type and crosslinking density of resin used in coating formulation. When water absorption and desorption of coating occured by exposing the coatings to electrolyte solutions of different concentration, increase in impedance caused by desorption of water was found to be higher in the case of thinner film.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.1
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• pp.161-170
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• 2003

The aesthetic restorative materials are widely used in recent dentistry, showed not only the different quality between each component but also showed that the environment of the material has important effect on the physical properties of the material. Especially, when the restoratives are restored in the mouth, and since saliva is existing, the restoratives are always exposed to water and affected by the saliva. The purpose of this study was to research and compare the change of the degree of water sorption after water immersion of three types of the resin-based materials and the compressive strength, and observe the relation between the change of the water absorbing degree and the compressive strength. Z-100(3M, U.S.A) as a composite resin, F-2000(3M, U.S.A) as a compomer and Vitremer Restoratives(3M, U.S.A) as a resin-modified GIC were used, and each specimen was made to measure the water sorption and to evaluate the compressive strength. The specimens for measurement of the water sorption and the compressive strength were divided into 4 groups(1 day, 2 weeks, 4 weeks, and 8weeks). Each specimen was filled in the 30cc vial with 20cc of distilled water during the fixed amount of period in $37^{\circ}C$. The water sorption is decided by dividing the difference of weight before and after the immersion by the volume, and the compressive strength was measured by using the instron after the immersion. The following results were obtained ; 1. The more the water sorption increased, the more the immersion period of three restorative materials was long. And the most of water sorption was obtained during the first 2 weeks(P<0.001). 2. The water sorption of resin-modified GIC was higher than composite resin and compomer. 3. The more the compressive strength decreased, the more the immersion period of three restorative materials increased(composite resin and compomer: P<0.001, resin-modified GIC: P<0.05). Especially, the amount of the reduction in compressive strength of the composite resin was the highest. 4. The more the water sorption of all materials increased, the more the compressive strength decreased(P<0.05).

• Korean Journal of Weed Science
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• v.8 no.1
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• pp.37-44
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• 1988

A serial study on differential response in absorption and translocation of $^{14}C$-oxyfluorfen was conducted by use of a group of selected rice cultivars as the tolerant or the susceptible to oxyfluorfen. Trial 1. Differential response in absorption and translocation of selected cultivar group. The susceptible cultivar group has reached as higher rate as 209%, 193%, 344%, 204% and 152% of the tolerant cultivar group in root absorption rate per unit dry weight, lower-shoot absorption rate, higher shoot absorption rate, whole amount of absorption, and the rate of translocation from bottom to shoot, respectively. Trial 2. Differential Response in Absorbtion and translocation of selected cultivar as affected by exposed portion and time. ${\bullet}$ Regardless of cultivar, the rate of root absorption has effectively realized but the translocation was significantly limited. ${\bullet}$ Lower portion of shoot has also achieved a higher amount of absorption but the translocation was very limited. ${\bullet}$ By relaying the exposure time. the amount of root absorption was ted increasing, and persistent absorption was rather effective in the susceptible (cv. Mushakdanti) cultivar than the tolerant (cv. Chokoto). ${\bullet}$ Translocation of oxyfluorfen from shoot to root was tended to easily attaining in both cultivars.

• Journal of Korean Society of Environmental Engineers
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• v.35 no.4
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• pp.233-239
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• 2013

This study was carried out to develop the realtime evaluation system of $NH_3$ absorption efficiency with gas sensors which were installed on the inlet and outlet of lab-scale scrubber system. The $NH_3$ absorption amount, calculated by sensor outcomes for 3 hr, 6 hr, and 12 hr of absorption process, was compared with the results analysed by Indo-phenol method for the absorption solution. Even though the difference between two methods was about 20%, the correlation coefficient between the two results was very high, more than 0.99. In addition, we could find very good correlation between pH, absorption amount and reaction time. Also we could find out the breakthrough time in the middle of absorption process. With more diverse experiment in the future, we can make gas sensor system for the realtime evaluation of the odor and/or air pollution treatment efficiency.

• Korean Journal of Environmental Agriculture
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• v.34 no.3
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• pp.161-167
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• 2015

BACKGROUND: For the heavy metal cotamination sites, it is very important to estimate the human bioavailability quotients for heavy metals in paddy soils released from mine tailings, which is a major source of contamination in Korea, and to assess the human health risks of heavy metals. METHODS AND RESULTS: This experiment was carried out to investigate the human bioavailability quotient of the heavy metals in paddy soils below part of the closed metalliferous mine. For estimating the human bioavailability quotients for heavy metals, 30 paddy soils below part of the closed mine were collected, and analyzed for Cd, Cu, Pb, Zn, and As using simple bioavailability extraction test(SBET). The quantities of Cd, Cu, Pb, Zn and As extracted from paddy soils below part of the mine by using the SBET analysis were 28.1, 17.3, 34.1, 14.6 and 2.3% respectively. Specially, the maximum values of Cd, Pb and Zn were 73.3, 81.5 and 58.1% of human bioavailability quotient, respectively, and varied considerably among the sampling sites. The human bioavailability quotient of Cd, Cu, Pb and Zn in soils near the closed mine showed significant positive correlation among soil pH value, O.M. and Ex. Ca. contents, while it correlated negatively between soil Ex. K and Ex. Mg contents in paddy soils. Also, its of Cd, Cu, Pb and Zn in paddy soils showed significant positive correlation with 0.1M HCl extractable and total contents, while in soils, it correlated negatively with As content in soil near the closed mine. CONCLUSION: The results of the simple bioavailability extraction test (SBET) indicate that regular ingestion of soils by the local population could be closed a potential health threat due to long-term heavy metals exposure in these mine areas.