• Journal of Conservation Science
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• v.31 no.2
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• pp.115-123
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• 2015

This study aims to increase the transparency of the natural adhesives made with lacquer and glue. For the purpose, samples were prepared by mixing urushiol with glue in varied proportion and the characteristics and adhesive properties were investigated. By adding glue on urushiol, IR spectra of the natural adhesives became similar to that of glue as the N-H band related with protein of glue increased, while that of methylene C-H bond related to urushiol decreased. Samples were dried within a day and maintained a bright color without blackening by oxidation during the curing process. The natural adhesives with urushiol and glue showed various range of viscosity and tensile shear strength as Cemedine C or Epoxy resin according to mixing ratio. In addition, the sample of mixing ratio of 6:4 showed bright and transparency in appearance and tensile shear strength similar to that of Araldite AY103-1/HY956 for earthenware layer.

• International Commerce and Information Review
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• v.15 no.4
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• pp.47-68
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• 2013

This paper attempts to reveal the relationships between HACCP, traceability, sharing information factors and Business Performance. According to precedent studies, Our study analysed 132cases from Korean companies which adopted a HACCP and then developed a structural equation model. As a result of the model test, this empirical study found that HACCP have a positively significant influence on food supply chain's traceability, sharing information and business performance. Second, there was a positive relationship among transparency, sharing information and Business performance. Last and foremost, transparency affects positively on Business performance mediate sharing information. For further study should be conducted for discovering effective practice factors of HACCP.

• The Journal of the Korean bone and joint tumor society
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• v.20 no.2
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• pp.89-93
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• 2014

Clear cell chondrosarcoma is a very rare malignant bone tumor that shows a strong predilection for the epiphysis or metaphysis of long bones. Many studies have reported that the proximal end of the femur is the most commonly affected site, followed by the proximal end of the humerus. Histopathologically, tumor cells of this type have centrally located round nucleoli with clear cytoplasm and a distinct cytoplasmic membrane. Generally, clear cell chondrosarcomas is not confused with conventional chondrosarcomas. However, when it involves the diaphysis in long bones, diagnosis can be hindered, as only three reports of this exist in the literature. We report herein an unusual case of clear cell chondrosarcoma of the tibial diaphysis in a 42-year-old male.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.79-79
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• 2010

최근, 차세대 디스플레이, 터치스크린, 전자파 차폐 및 흡수 등의 분야에 응용하기 위해서 현재 주로 사용되고 있는 ITO박막을 대체하기 위한 연구가 활발하게 진행 되고 있다. ITO 박막은 희소원소인 인듐에서 기인하는 높은 비용뿐만 아니라 매장량도 한계가 있어 대체 재료의 개발이 시급하게 요구되고 있다. 더구나, 다양한 차세대 응용에 있어서는 투명전도성 뿐만 아니라 휠 수 있는 유연성까지 요구되어 ITO박막을 대체할 새로운 투명전도성 유연 박막의 개발에 관한 연구들이 활발히 이루어지고 있다. 탄소나노튜브(CNT)는 금속을 능가하는 이론적인 전기전도도를 갖고 있으며, 높은 탄성등의 우수한 기계적 성질을 갖고 있어, 전도성 확보 및 유연성 구현이라는 투명전도성 플렉서블 박막소재에 요구되는 사항들을 충족시킬 뿐만 아니라, 최근의 대량 합성법등의 개발로 저가에 공급할 수 있다는 장점들이 있어 ITO대체 재료로서 주목을 받고 있다. 그러나, CNT는 튜브 사이에 강한 반데르발스 인력을 가지고 있어 용매 중에 분산하는데 많은 어려움이 있으며, 액상 분산과정을 통한 CNT기반의 플렉서블 박막 제작에 있어서 큰 과제로 남아있다. 본 연구에서는 플라즈마 기능화 처리를 통하여 CNT에 친수성을 부여하였고, 초음파 처리를 통하여 에탄올 중에 CNT를 균일하게 분산한 후, 스프레이 분사법을 이용해 투명 유연기판인 PET고분자 필름위에 균일 박막을 제작하였다. CNT는 아세틸렌 가스를 이용한 열화학증기증착법으로 1mm 이상의 길이를 갖는 수직배향 CNT를 합성하였으며, 이를 아르곤 및 암모니아 플라즈마로 기능화 처리를 실시하였다. 플라즈마 처리를 통해 기능화 된 탄소나노튜브는 플라즈마 처리되지 않은 탄소나노튜브와 분산 속도에서 현저한 차이를 보였다. 제작한 CNT 기반의 투명전도성 유연박막들은 막두께에 따른 전도도 및 투광도의 관계를 조사하였고, 기판에 분사된 CNT 박막의 표면 특성은 AFM, Raman, 접촉각 실험 등을 통하여 분석하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.25-27
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• 2011

본 논문에서는 경제의 글로벌화를 반영하는 세계적인 현상인 국제회계기준 채택에 대하여 회계 관련사항을 내재하고 있는 기업의 전사적 관리 소프트웨어인 국산 ERP 시스템에 대하여 세금처리의 투명성을 향상시킬 수 있는 방법론적 모델을 해외 ERP의 장점을 통하여 연구한다. 국제회계기준은 기업요소에서 가장 중요한 자본의 국제적인 이동이 기본적 사항으로 기업의 소재지에 대한 국가표시와 관계없이 재무제표의 정보가 투명하고 비교 가능하도록 국제적으로 단일한 회계기준이 사용을 요구한다. 이러한 환경 변화에 따라 국제회계기준(International Financial Reporting Standards: IFRS)의 필요성과 중요성이 확대되어지고 있으며 국제회계기준위원회(International Accounting Standards Board: IASB)의 영향력까지 강화되어지고 있다. 본 논문은 국제회계기준에 맞춘 회계처리 부분의 투명성 향상 모델을 연구하기 위하여 국내에서 많이 사용되고 있는 국산 ERP 소프트웨어 프로그램에 대하여 국제회계기준과 상반되는 현상을 유발하는 기준이 되는 부분을 상호 보완할 수 있는 해외 ERP 소프트웨어 프로그램을 기반으로 기업 시스템을 분석, 구현한다. 국산 ERP 시스템의 국제회계기준 처리와 관련된 단점은 송장의 수정, 삭제가 용이하며 수정, 삭제 후 이력이 남지 않는 부분이다. 이 부분은 국제회계기준에서는 신뢰성에 대한 중대한 문제를 유발하므로 외산 ERP패키지의 장점인 수정과 삭제 단계가 계층적이며 수정, 삭제를 하더라도 필수적으로 이력전체가 저장되는 시스템을 연구하며 특히 세금처리 부분이 상이한 점을 보완하기 위한 모듈을 추가한다. 수정, 삭제에 대한 이력관리는 담당자의 전문적 능력평가와 동시에 실수와 오류부분에 대한 통계를 통하여 관리의 향상성을 추구하여 투명성이 향상된 모델 구축에 활용할 수 있다.

• Journal of the Korean Society of Radiology
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• v.15 no.2
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• pp.131-137
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• 2021

The purpose of this study was to present the reference value of the intracranial translucency(IT) of the fetus using the mid sagittal plane of the post brain in the early pregnancy ultrasound screening test and to find the clinical significance. From August 2018 to February 2020, the IT of 1529 singleton fetus whose crown lump length were 40.6 mm to 78.3 mm in length among the mothers undergoing regular checkups at Hospital I were measured and analyzed retrospectively. As the crown lump length increased, the IT showed a 54.3% explanatory power and tended to increase(p<0.001). In addition, through frequency analysis, the standard value for the percentile of the IT by gestational weeks was calculated. As a result, it was possible to establish a standard value for Koreans with an IT, and it will be usefully applied as an auxiliary screening test for spina bifida in the evaluation of fetal post brain in early pregnancy.

• Journal of Korean Ophthalmic Optics Society
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• v.21 no.3
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• pp.215-225
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• 2016

Purpose: The aim of this study was to figure out how the characteristics of soft contact lens materials and pigmentation affect the adherence of C. albicans on soft contact lenses pre-deposited with tear constituents. Methods: The adherent number of C. albicans on clear soft contact lenses (hereinafter clear lenses) and circle soft contact lenses (hereinafter circle lenses) made of etafilcon A, hilaiflcon B and nelfilcon A, respectively, was measured before and after the deposition of artificial tear. Also, bacteria adherence on lenses were observed by a scanning electron microscope. Results: Adherence of C. albicans was significantly different according to lens materials. The amount of adsorption was not different between clear lenses and circle lenses made of etafilcon A however, the number of bacteria absorption was bigger in hilafilcon B and nelfilcon A lenses. More absorption of C. albicans was found in the non-pigmented central area compared the pigmented area, and non-pigmented peripheral area has more bacterial absorption than non-pigmented central area. The number of C. albicans decreased in the case that tear protein was pre-deposited. The maintenance of antibacterial activity against C. albicans was different according to lens materials thus, etafilcon A has the longest period of its maintenance. Conclusions: It was revealed that the number of C. albicans was different according to the characteristics of lens materials, pigmentation or non-pigmentation, the pigmented area of soft contact lenses. Thus, it is suggested that the management method should be different according to the adsorption characteristics of C. albicans.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.372-377
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• 2016

Communication flow is changing rapidly. Recently, a range of wearable devices such as wearable glasses and wearable watch, have been launched. These kinds of wearable devices help people to live a more comfortable life. Wearable devices most have an antenna for wireless communication. This paper reports a transparent antenna that is made of an optically transparent material for wearable glasses. Transparent antenna can be applied to smart windows and will not disturb the view of user. IZTO/Ag/IZTO multilayer electrode has higher electrical and optical properties. This antenna is available because of its good electrical properties. This study measured the performance of the proposed transparent antenna, which is made of a multilayer electrode, applied to a lens. The proposed antenna was simulated with several substrates. The antenna impedance was matched with length and width of the antenna. The antenna's conductivity and transparency was measured using a HMS-3000 and UV-spectrometer. A 40nm thick Ag single layer antenna was fabricated on a flexible polyimide substrate for comparing the antenna performances. The fabricated antenna is useable at a frequency of 2.4-2.5GHz, which is suitable for Wifi communications and has peak gain of 2.89dBi and an efficiency of 34%.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.36 no.4
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• pp.253-258
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• 2010

Until now, evaluating the efficacy of brightening mainly depends on total reflective light measurement. For example, SHV (Saturation, Hue, Value), $L^*$ $a^*$ $b^*$ (CIELAB color space system) color space system was used and lightness and saturation changes were chosen as major parameters for evaluating brightening effect. However, those parameters were calculated from total reflective light on the skin and it is hard to evaluate perceptive efficacy such as luminescence, and glossy. In this research, we applied new method for estimating change of luminescence of skin by using 'Lumiscan' which uses polarized light for detecting surface and inside reflective light independently. We also tested 15 different parameters for finding correlations between luminescence and those parameters. As a results, our 2 different brightening products showed 5 ~ 9 % increase of luminescence at 4 and 8 weeks. And we also found that skin roughness (-28 %), melanin index (-17 %), redness (-7 %), hydration (15 %), and lightness (6 %) were related to luminescence of skin.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.37 no.2
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• pp.121-127
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• 2011

Skin darkness is the source of trouble to many women. Skin darkness is the state that while skin redness and brightness are reduced, skin yellowness is increased. Skin translucency which is measured by skin color, especially brightness is an another expression of skin darkness. Skin brightness is usually expressed by L value of $L^{*} \;a^{*}\; b^{*}$ (CIELAB color space system). However, it is hard to find the relationship between L value and perceptive efficacy such as translucency because the L value is just a factor of evaluation of skin darkness. The skin with high translucency has high scattering reflective light value than low value. In this study, we measured the skin translucency of 20 ~ 30 ages men and women face by both our designed previous device which use polarized light to detect surface and scatter reflective light independently and $Lumiscan^{TM}$ which is improved designed to confirm our new device working ability by calculation of relationship between trnaslucency and scattering reflective light value. The result of this study indicate that there is a high correlation (R = 0.732, p < 0.01) between translucency and scattering reflective light value, and suggest that $Lumiscan^{TM}$ is portable and easy measuring device more that previous device.