• Title/Summary/Keyword: InAs 양자점

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The Introduction of Western Medicine and The Change of Body Conception (서양 의학의 수용과 신체관의 변화 - 최한기의 『신기천험(身機踐驗)』을 중심으로 -)

  • Kim, Moon-Yong
    • (The)Study of the Eastern Classic
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    • no.37
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    • pp.345-375
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    • 2009
  • In relation to body conception, the introduction of western medicine to Joseon Korea started off some points in disputes: the one was whether the western anatomy was positive or not, the other was whether the cognition was ruled by heart or brain. In the long run of these disputes, that who had clarified the change of body conception was Choi Han Kee. His new conception of body was characterized as follow: on the one hand, it emphasized the mechanical conception of body; on the other hand, it emphasized the cognitive ability of body. But that his conception of body had obscure points: that is, its mechanical conception was intervened by chi(神氣), and his doctrine of cognition searched for the origin of cognition in balance of chi of the body. He had set up this conception of body by the combination of western medicine and chi, but the combination did not seem to be perfect. This point had appeared again in his conception of physics that he thought the basis of medicine. He had pursed the combination of chemical element and chi, but it could not be accomplished successfully unless he had abandoned the organicist conception of chi. In conclusion, his new conception of body was not free from the suspicion of a incomplete tentative construction.

Examining causal relationships between regulation and national competitiveness using system dynamics method (규제와 국가경쟁력간의 인과관계)

  • Choi, Young-Chool
    • Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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    • v.8 no.7
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    • pp.137-147
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    • 2018
  • Up until now, Korea has been recognized as one of the most severe and strict countries in terms of social regulation. As a result of that, it is generally accepted that economic activities in private sector have been contracted to some extent, weakening national competitiveness. Under this background, this paper examines the complex relationships among factors affecting national competitiveness and regulation and also seeks to discover feedback loops associated with its relationship. The research result shows that reinforcing feedback and balancing feedback loops are found in the system concerned with national competitiveness and regulation. Accordingly, it implies that we need to pay our attention to the management of those loops in order to discover the optimal point striking the balance between regulation and deregulation in terms of national competitiveness. It also implies that we need to conduct sensitivity analysis to forecast the potential results which the scenarios will bring about.

Utilizing Internet GIS for Cyber Governance (Cyber Governance를 위한 인터넷 GIS의 활용방안)

  • Kim, Kwang Ju
    • Journal of the Korean Association of Geographic Information Studies
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    • v.5 no.3
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    • pp.68-76
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    • 2002
  • As modern public administrations are constructing homepages based on GIS and enhancing public services through interactive communication with their citizens, cyber governance and internet GIS have been conglomerated more than before. As such, the transformation from 'GIS for public management' to 'Internet GIS for cyber governance' is in progress. In the future, cyber governance based on Internet GIS can be a new paradigm for public management. The aim of this study is to look for the applications of internet GISs for cyber governance. For this purpose, the study examines characteristics of cyber governance and internet GIS and analyses similarities between them. Based on this analysis, the study proposes various ways of applying internet GISs for cyber governance.

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Characteristics of Fulltext Index by Human and Automatic Indexing Systems (전문색인에 있어서 수작업 색인과 자동색인의 특성)

  • Kim, Gi-Yeong
    • Journal of the Korean Society for information Management
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    • v.25 no.2
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    • pp.199-221
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    • 2008
  • The purpose of this study is to investigate the characteristics of indexes by human and machine, and differences between them in terms of term identification in a fulltext environment. A back-of-book index and two indexes produced by two term identifiers (LinkIt and Termer) as pseudo-indexing systems for a whole body of a monograph are examined. In the investigation, the traditional contrast between manual and automatic indexing is confirmed in fulltext environment, manual index is for browsing and human use, and automatic index is for searching and machine use. The border between them, however, becomes vague. Some considerations for the use of the term identifiers for browsing and for searching are discussed, and further research for the use of the term identifier is suggested.

A study on the theory of "zhong-hua" in the Sung dynasty (송대 "중화(中和)" 사상에 관한 일고찰 - 사마광(司馬光)과 한유(韓維)의 서신 교환을 중심으로 -)

  • Lim, Myunghee
    • The Journal of Korean Philosophical History
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    • no.38
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    • pp.251-273
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    • 2013
  • This paper deals with mind and human nature dispute between Si-Ma guang and Han-Yu in the Northern Sung Dynasty, focused upon the "zhong-hua". The letter exchange between Si-Ma guang and Han-yu, which were the mind and human nature debate between a representative intellectually of the Confucianism and a scholar who absorbed in the Buddhism, can provide the discussion on various ideological origins that affected the development of the mind and human nature theory. Moreover, the contents of a letter from both of them can be used as an important cue to observe the discussion under what ideological foundations the mind and human nature theory could be embodied in the future and what advance it has made and what is its philosophical meaning.

Characteristics of SiO2/Si Quantum Dots Super Lattice Structure Prepared by Magnetron Co-Sputtering Method (마그네트론 코스퍼터링법으로 형성한 SiO2/Si 양자점 초격자 구조의 특성)

  • Park, Young-Bin;Kim, Shin-Ho;Ha, Rin;Lee, Hyun-Ju;Lee, Jung-Chul;Bae, Jong-Seong;Kim, Yang-Do
    • Korean Journal of Materials Research
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    • v.20 no.11
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    • pp.586-591
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    • 2010
  • Solar cells have been more intensely studied as part of the effort to find alternatives to fossil fuels as power sources. The progression of the first two generations of solar cells has seen a sacrifice of higher efficiency for more economic use of materials. The use of a single junction makes both these types of cells lose power in two major ways: by the non-absorption of incident light of energy below the band gap; and by the dissipation by heat loss of light energy in excess of the band gap. Therefore, multi junction solar cells have been proposed as a solution to this problem. However, the $1^{st}$ and $2^{nd}$ generation solar cells have efficiency limits because a photon makes just one electron-hole pair. Fabrication of all-silicon tandem cells using an Si quantum dot superlattice structure (QD SLS) is one possible suggestion. In this study, an $SiO_x$ matrix system was investigated and analyzed for potential use as an all-silicon multi-junction solar cell. Si quantum dots with a super lattice structure (Si QD SLS) were prepared by alternating deposition of Si rich oxide (SRO; $SiO_x$ (x = 0.8, 1.12)) and $SiO_2$ layers using RF magnetron co-sputtering and subsequent annealing at temperatures between 800 and $1,100^{\circ}C$ under nitrogen ambient. Annealing temperatures and times affected the formation of Si QDs in the SRO film. Fourier transform infrared spectroscopy (FTIR) spectra and x-ray photoelectron spectroscopy (XPS) revealed that nanocrystalline Si QDs started to precipitate after annealing at $1,100^{\circ}C$ for one hour. Transmission electron microscopy (TEM) images clearly showed SRO/$SiO_2$ SLS and Si QDs formation in each 4, 6, and 8 nm SRO layer after annealing at $1,100^{\circ}C$ for two hours. The systematic investigation of precipitation behavior of Si QDs in $SiO_2$ matrices is presented.

Quality Properties of Cream Soup Added with Chungdong Pumpkin and Sweet Pumpkin (청동호박과 단호박을 첨가한 크림수프의 품질 특성)

  • 김정미;노용환;유양자
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.33 no.6
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    • pp.1028-1033
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    • 2004
  • This study was conducted to improve the quality properties of cream soup in accordance with the added amount of sweet pumpkin and Chungdong pumpkin, roux and chicken stock. As the amount of pumpkin was increased, red (a-value) and yellow (b-value) colors increased but its lightness (L-value) remarkably decreased. Also, there was a significant differences in viscosity, color, appearance and overall preference of sensory evaluation. In pumpkin 150 g (37.5%) added, the degree of total preference was high. As the added amount of roux was increased, red and yellow colors decreased by small margin and there was a significant differences in color, flavor, appearance and overall preference of sensory test. At adding roux of 5 mL (1.5%) showed the highest preference. With the adding chicken stock increase the lightness, red and yellow color decreased. It was found by sensory evaluation that there were significant differences in viscosity, color, flavor, appearance and overall preference. At adding chicken stock 150 mL (37.5%) and milk of 50 mL (12.5%) showed the high score in flavor, appearance and total preference.

The Modeling of the Optimal Data Format for JPEG2000 CODEC on the Fixed Compression Ratio (고정 압축률에서의 JPEG2000 코덱을 위한 최적의 데이터 형식 모델링)

  • Seo, Choon-Weon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.6
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    • pp.109-116
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    • 2005
  • Recently, images/videos have been preferred as the communication media because of their information-implication and easy recognizability. But the amount of their data is so large that it has been the major research area to compress their data. This paper is related to optimization in th image data format, which can make a great effect in performance of data compression and is based on the wavelet transform and JPEG2000. This paper established a criterion to decide the data format to be used in wavelet transform, which is on the bases of the data errors in frequency transform and quantization. This criterion has been used to extract the optimal data format experimentally. The result were(1, 9) of 10-bit fixed-point format for filter coefficients and (9, 7) of 16-bit fixed-point data dormat for wavelet coefficients and their optimality was confirmed.

The Modeling of the Optimal Data Format for JPEG2000 CODEC (JPEG2000 코덱을 위한 최적의 데이터 형식 모델링)

  • Kang, Chang-Soo;Seo, Choon-Weon
    • Journal of the Institute of Electronics Engineers of Korea TE
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    • v.42 no.4
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    • pp.7-14
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    • 2005
  • Recently, images/videos have been preferred as the communication media because of their information-implication and easy recognizability. But the amount of their data is so large that it has been the major research area to compress their data. This paper is related to optimization in the image data format which can make a great effect in performance of data compression and is based on the wavelet transform and JPEG2000. This paper established a criterion to decide the data format to he used in wavelet transform which is on the bases of the data errors in frequency transform and quantization. This criterion has been used to extract the optimal data format experimentally. The result were (1, 9) of 10-bit fixed-point format for filter coefficients and (9, 7) of 16-bit fixed-point data format for wavelet coefficients and their optimality was confirmed.

Analysis of Electromagnetic Wave Scattering From a Perfectly Conducting Pierson-Moskowitz Surface Using a Monte-Carlo FDTD Technique (몬테칼로 유한차분 시간영역 해석기법을 이용한 피어선-모스코위츠 완전도체 표면에서의 전자파 산란 해석)

  • 최동묵;김채영
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.40 no.6
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    • pp.253-259
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    • 2003
  • In this paper, the scattered field from a Pierson-Moskowitz sea surface assumed as the PEC by the Finite-Difference Time-Domain(FDTD) method was computed. A one-dimensional surface used to analysis scattering was generated by using the Pierson-Moskowitz model. Back scattering coefficients are calculated with different values of the wind speed(U) which determine configuration of the Pierson-Moskowitz sea surface. The number of surface realization for the computed field, the point number, and the width of surface realization are set to be 50, 8192, and 128k, respectively. In order to verify the computed values these results are compared with those of small perturbation methods, which show good agreement between them.