• Journal of the Korean Wood Science and Technology
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• 제25권4호
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• pp.17-21
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• 1997

This study was carried out to develop the manufacturing technique of Korean paper(Hanji) and find out new uses of machine-made Hanji produced on a a large scale by paper machine. Six kinds of Hanji were made and laminated with backpaper by acryl-based or vinyl acetate ethylene-based adhesive. Six kinds of wallpapers were made such as WH 1, WH 2-1, WH 2-2, WH 3-1, WH 3-2 and WH 4. Physical properties and quality test on the wallpapers were examined. Physical strength of the wallpapers was better than each strength of the Hanji and backpaper. It might be a roll of adhesive. And so, Production cost of the Hanji could be brought down if the Hanji was made thin to get strength not enough to cut during lamination of two papers(Hanji and backpaper). Hanji wallpapers of WH 3-1 and WH 4 are lower than a standard in sunlight resistance and WH 1 is in properties of opacity. WH 2-1, WH 2-2 and WH 3-2 were better than Korean standard in some quality tests. WH 2-2 and WH 3-2 were superior to other wallpapers as a whole. About, twenty kinds of wallpapers with surface treatment, are now being produced on the basis of these two types of wallpapers.

• 터널과지하공간
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• 제20권6호
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• pp.434-445
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• 2010

대용량 전력에너지저장시설로서의 복공식 압축공기 지하저장시설의 기밀시스템을 구성하는 콘크리트 라이닝 및 현장 타설 과정에서 발생하는 시공이음부의 투기특성을 파악하고자 콘크리트 블록시료를 이용한 모형실험을 수행하였다. 시공이음부의 투과계수는 콘크리트 블록보다 약 $10^1{\sim}10^4$ 배 정도의 투과성이 큰 것으로 파악되어, 현장 타설과정에서 시공이음부의 품질관리가 저장시설의 기밀성능 확보 관점에서 매우 중요함을 확인하였다. 또한, 접합면에 아크릴계 접착제를 타설함으로써 시공이음부의 투과계수를 콘크리트 블록 수준까지 감소시킬 수 있었으며 콘크리트 블록의 초기 수분함량이 높을수록 투과계수가 감소하여 기밀성능을 향상시킬 수 있음을 확인하였다.

• 패션비즈니스
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• 제12권5호
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• pp.77-93
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• 2008

The purpose of the study was to examine make-up expression elements of horror characters as an evil spirit, a vampire, a zombie, a monster and a psycho murderer through make-up, focused on horror movies of the United States after1960s. First, an evil spirit was expressed that the pupil grew dim without a focus and the skin was torn by going bad and rot completely. Also, it was expressed that its teeth was changed to pointed canine teeth as a wild beast and its pale and bloodless face showed blood vessels clearly. To express its bloodless and pale skin, air brush was swept into the skin over several times. Its canine tooth was made acryl powder into its shape and was harden to make its shape smooth. Also, it was colored to show people like the real thing. Second, a vampire was expressed by make-up elements as long nails, a sharp canine tooth, a pale skin with a blood vessel and dead eyes. Its rough skin and long nails were manufactured with latex foam, which was colored like the skin. Third, a monster image as a werewolf was expressed by make-up elements as fur, sharp teeth, changed nails and toenails, a rough skin and a face changed to a wolf. Rubber mask and rubber body suit were manufactured as a make-up of special character and so all its body was changed. Fourth, a psycho murderer and body-deformed man were expressed by make-up elements as a distorted mask, swelled-up and deformed skull and face form, terribly deformed body, discolored and hang down skin and teeth with an indeterminate form. Its body and face were manufactured by the foam latex technology according to make-up design as a make-up of special character.

• 한국식품과학회지
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• 제30권4호
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• pp.842-847
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• 1998

Ohmic heating은 식품에 교류 전류를 흘려줄 때 식품 내부에 전기 저항열이 발생되는 것을 이용한 것으로, 이를 기존의 수해동법에 적용하여 해동시간의 단축과 그에 따른 품질 향상 효과를 연구하였다. 자체 제작한 ohmic 수해동 장치에 동결육$(10{\times}10{\times}10{\;}cm)$을 넣고 해동 실험하였다. 윗면이 개방된 acryl box$(12{\times}12{\times}12{\;}cm)$를 용기로 사용하였으며, stainlesssteel 전극$(10{\times}10{\;}cm)$을 양쪽 벽면에 설치하였다. 용기 내 물의 온도를 $20^{\circ}C$ 또는 $10^{\circ}C$로 고정하였다. 해동시간은 동일한 주파수(60 Hz)에서 전압을 높여줄수록$(60{\sim}210{\;}V)$ 단축되었으며, 수해동만을 한 경우에 비해 최고 1/4 이상 단축되었다. 동일한 전압에서 주파수가 높아질수록 $(60{\sim}60{\;}kHz)$ 해동시간이 단축되었으나 그 효과는 크지 않았다. 수해동만을 한 경우나 높은 전압을 적용한 경우보다 낮은 전압을 적용한 경우 drip loss가 적었고 보수력이 우수하였다.

• 접착 및 계면
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• 제13권4호
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• pp.156-162
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• 2012

UV 경화형 우레탄아크릴레이트 수지와 유기화클레이를 혼합한 후 UV를 조사하여 경화시킴으로써 폴리우레탄-클레이 나노복합체를 제조하였다. 유기화클레이로서는 Closite20A (C20A) 및 이를 실란처리하여 표면에 아크릴기를 도입한 아크릴변성 C20A를 사용하였다. XRD와 TEM 분석으로부터 제조된 나노복합체는 삽입형 나노복합체이며, 아크릴 변성시킨 C20A가 변성시키지 않은 C20A에 비해 더 잘 분산되는 것을 알 수 있었다. DMTA, 연필경도분석, PET 필름에의 부착성 시험으로부터 클레이 첨가에 의해 유리전이온도와 저장탄성률 및 연필경도가 증가하고 PET 필름에의 부착성이 향상되며, 이러한 물리적 특성의 증가는 아크릴 변성시킨 C20A를 함유한 나노복합체에서 더 크게 발현됨을 알 수 있었다. 또한, 클레이 첨가에 의해 UV경화 시 수반되는 수축을 저하시킬 수 있음을 알았다. 한편, 제조된 나노복합체는 우수한 광투과도를 나타내었으나, 광택도는 나노입자를 함유하지 않은 경우에 비해 다소 저하되었다.

• 한국수산과학회지
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• 제54권5호
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• pp.624-633
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• 2021

This study was conducted to determine the supplemental effects of two insect meals, mealworm (MW) and black soldier fly (BSF), with high or low lipid levels in diets, on Pacific white shrimp Litopenaeus vannamei. Sardine and tuna by-product meals were used as the fish meal source in a control (Con) diet. The fish meals were replaced with MW, defatted MW (deMW), BSF or defatted BSF (deBSF), respectively. The shrimp (body weight: 0.47 g) were stocked into 20 acryl tanks (215 L) and fed the diets six times a day. After 45 days of the feeding trial, the shrimp that were fed insect meals had significantly higher phenoloxidase and superoxide dismutase activities than the shrimp fed Con diet. The gene expressions of prophenoloxidase, crustin and penaeidine-3c in shrimp hepatopancrease were also higher in shrimp that were fed the insect diets, regardless of defatting than those in shirmp that were fed Con diet. The survival against Vibrio parahaemolyticus was higher in shrimp that were fed the diets containing defatted insect meals than in shrimp that were fed Con diet. These results indicate that MW and BSF, regardless of lipid levels, could be good protein sources for the enhancement of innate immunity and anti-oxidant capacity of the shrimp.

• 한국육종학회지
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• 제43권2호
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• pp.133-138
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• 2011

The groundnut or cultivated peanut (Arachis hypogaea L.) in Korea consists of 36 domestic varieties which have been developed and registered as cultivars for the public during last 25 years. To screen and identify of Korean peanut varieties and genetic resources, we present a simple and reliable method. A methodology based on simple sequence repeat (SSR) markers developed and widely used for prominent gene identification and variety discrimination. For identification of those 36 Korean peanut varieties, 238 unique peanut SSR markers were selected from some previously reported results, synthesized and used for polymerase chain reaction (PCR). Data were taken through acryl amide gel electrophoresis and changed into proper formats for application of data mining analysis using Biomine (all-in-one functional genomics data mining program). Consequently, twelve SSR primers were investigated and revealed the differences between those 36 varieties. These primer pairs amplified 27 alleles with an average of 2.3 allele per primer pair. In addition, those results showed genetic relationship by classification method within 36 varieties. The approach described here could be applied to monitoring of our varieties and adapting to peanut breeding program.

• Geomechanics and Engineering
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• 제18권3호
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• pp.259-266
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• 2019

This paper presents a comparison between experimental measurements and numerical estimations of penetration length of a cement grout injected in discrete joints. In the experiment, a joint was generated by planar acryl plates with a certain separation distance (; aperture) and was designed in such a way to vary the separation distances. Since a cement grout was used, the grout viscosity can be varied by controlling water-cement (W/C) ratios. Throughout these experiments, the influence of joint aperture, cement grout viscosity, and injection rate on a penetration length in a discrete joint was investigated. During the experiments, we also measured the time-dependent variation of grout viscosity due to a hardening process. The time-dependent viscosity was included in our numerical simulations as a function of elapsed time to demonstrate its impact on the estimation of penetration length. In the numerical simulations, Bingham fluid model that has been known to be applicable to a viscous cement material, was employed. We showed that the estimations by the current numerical approach were well comparable to the experimental measurements only in limited conditions of lower injection rates and smaller joint apertures. The difference between two approaches resulted from the facts that material separation (; bleeding) of cement grout, which was noticeable in higher injection rate and there could be a significant surface friction between the grout and joint planes, which are not included in the numerical simulations. Our numerical simulation, meanwhile, could well demonstrate that penetration length can be significantly over-estimated without considering a time-dependency of viscosity in a cement grout.

• 공업화학
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• 제30권3호
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• pp.352-357
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• 2019

본 연구에서는 3-butenoic acid와 폴리옥시에틸렌(20) 스테아릴 에테르를 사용하여 비닐기를 가진 반응성 유화제를 합성하였다. 합성 반응성 유화제는 FT-IR 및 $^1H-NMR$에 의해 확인되었다. 또한, 아크릴계 점착제의 제조에서 합성된 반응성 유화제와 통상적으로 사용되는 비이온성 유화제를 사용하여 각각의 점착제의 특성을 비교하였다. 고형분 함량은 56.8~57.4%의 범위에서 측정되었다. 초기 접착의 경우, 반응성 유화제로 제조된 S20BA는 $^{\sharp}13$으로 측정되었다. 제조된 접착제의 박리강도는 $0.66{\sim}1.05kg_f$의 범위에서 측정되었고 S20BA를 사용한 경우 가장 높은 박리 강도가 측정되었다. 내열성 시험 결과, S20BA의 내열성이 $840^{\circ}C$로 가장 높았다. 피부용 접착제에 대한 응용성을 평가하기 위하여 pH는 중성 7로 측정되었으며, 일차 피부 자극 시험의 결과로 비자극성으로 측정되었다.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.450-453
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• 2002

In radiotherapy treatment planning, it is critical to deliver the radiation dose to tumor and protect surrounding normal tissue. Recent developments in functional imaging and radiotherapy treatment technology have been raising chances to control tumor saving normal tissues. A brain phantom which could be used for image registration technique of CT-MR and CT-SPECT images using surface matching was developed. The brain phantom was specially designed to obtain imaging dataset of CT, MR, and SPECT. The phantom had an external frame with 4 N-shaped pipes filled with acryl rods, Pb rods for CT, MR, and SPECT imaging, respectively. 8 acrylic pipes were inserted into the empty space of the brain phantom to be imaged for geometric evaluation of the matching. For an optimization algorithm of image registration, we used Downhill simplex algorithm suggested as a fast surface matching algorithm. Accuracy of image fusion was assessed by the comparison between the center points of the section of N-shaped bars in the external frame and the inserted pipes of the phantom and minimized cost functions of the optimization algorithm. Technique with partially transparent, mixed images using color on gray was used for visual assessment of the image registration process. The errors of image registration of CT-MR and CT-SPECT were within 2mm and 4mm, respectively. Since these errors were considered within a reasonable margin from the phantom study, the phantom is expected to be used for conventional image registration between multimodal image datasets..