• Title/Summary/Keyword: ERAS

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A Novel Asymmetric Vertical Directional Coupler Switch (비대칭 수직 방향성 결합기 스위치)

  • Jo, Seong-Chan;Jeong, Byeong-Min;Kim, Bu-Gyun;Choe, Ji-Yeon;Hwang, Hyeong-Yong
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.39 no.5
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    • pp.31-40
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    • 2002
  • We propose a novel ultra-short asymmetric vertical directional coupler switch (VDCS) with high extinction ratios larger than 30㏈ composed of switching operation induced section (SOIS), extinction ratio adjusted section (ERAS), and extinction ratio enhanced section (ERES). In this VDCSs, switching operation is achieved by changing the refractive index of one core in SOIS. The improvement of extinction ratios larger than 30㏈ for both cross and bar states is achieved by controlling the asymmetry of refractive indices between both cores in ERES. After propagating through ERAS with symmetry in the structure, different extinction ratios between cross and bar states at the end of SOIS are changed to the same value. For this reason, the optimum asymmetry of the refractive indices of cores to have the maximum extinction ratios and the lengths of ERES are the same for cross and bar states. Design guidelines to achieve high extinction ratios with large tolerances are presented.

Yangshao Culture and Rice Culture - In Relations to Dissemination of Rice Culture Towards to the North - East of China - (중국 앙소시대 문화와 도작농업 -재배도의 동북방향 전파노선과 관계하여-)

  • Chang, Juzhong;Wang, Xiangkun;Cui, Zong Jun;Heu, Mun Hue
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.41 no.3
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    • pp.376-383
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    • 1996
  • Distribution of archaeological sites where the rice and Itallian millets were excavated was discussed in relation to the rice culture of Yangshao era. According to the distribution of the sites where the rice and Italian millet remains were excavated, the putative border of rice growing area, Italian millet growing area and mixed-cropping area were drawn. Discussions were made about the drifting of the area of mixed-cropping, north and south, depending on the climates of archaeological eras, The climates of the eras were discussed with the various remains of animals and plants excavated from each era's sites. Examining the chronology of mixed-cropping area the extension of rice culture were traced chronologically. And the extension of rice culture towards north-east during the last period of Yangshao era, and the feasibilities of transfer to the Han-river mouth area in Korea, 5,000 aBP(about Before Present), were discussed.

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A Study on the Measurement Tool Development of Reading Motivation Using Self-determination Theory (자기결정성 동기이론에 의한 독서동기 측정도구 개발에 관한 연구)

  • Lee, Byeong-Ki
    • Journal of the Korean Society for Library and Information Science
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    • v.49 no.3
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    • pp.311-332
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    • 2015
  • This study aims at developing the measurement tool of reading motivation using self-determination theory (SDT). SDT is not simply divided into the intrinsic and extrinsic motivation. SDT resides along a continuum, with amotivation, external regulation, introjected regulation, identified regulation, integrated regulation, intrinsic motivation. SDT addresses the process of internalization of various extrinsic motives. This study analyzed motivation factor of the measurement tool such as MRQ (motivations for reading questionnaire), MRP (motivation to read profile) ERAS (elementary reading attitude survey, RSCS (reading self-concept scale). The study re-classified analysis results based on SDT. Ultimately, this study was proposed measurement tool of reading motivation using SDT has 6 area, 30 items.

A Literature Review on the Types and Cooking Methods for Joseon Dynasty Tteok (Korean Rice Cake) according to its Sub-Ingredients (부재료에 따른 조선시대 떡류의 종류 및 조리방법에 대한 문헌적 고찰)

  • Oh, Soon-Duk;Lee, Gui-Chu
    • Journal of the Korean Society of Food Culture
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    • v.25 no.5
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    • pp.525-543
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    • 2010
  • This article examines the types and cooking methods for tteok (Korean rice cake) according to its sub-ingredients, as recorded in 18 old literatures of the Joseon dynasty (1392~1909). The sub-ingredients used in tteok during the Joseon dynasty were categorized into flowers, fruits, vegetables, Korean typical medicinal plants, and others. In the early, middle, and late eras of the Joseon dynasty, one, six, and 14 kinds of tteok were prepared using flowers as the sub-ingredient and two, seven, and 32 kinds of tteok were prepared using fruits, respectively. Three, seven, and 38 kinds of Tteok were prepared using vegetables as the sub-ingredient, while there were three, five and 15 kinds tteok prepared using Korean medicinal plants, respectively. One, five, and 13 kinds of tteok were prepared using other ingredients such as fish and seogi mushrooms in the early, middle, and late eras of the Joseon dynasty, respectively. The types of sub-ingredients and the resulting types of tteok increased throughout the Joseon dynasty, indicating that flowers and vegetables were preferred the most among tteok sub-ingredients. Tteoks using flower as the sub-ingredient, whajeon, were mostly jijin-tteok. The types of tteok and cooking methods using other sub-ingredients were discussed in terms of the type of sub-ingredients and their treatment to prepare tteok. The sub-ingredients were mixed with flour, which was the main ingredient for preparing tteok, or ground and shredded to prepare gomul for decorating and stuffing tteok, respectively. It seemed that the appearance and taste of tteok varied, thereby resulting in nutrient supplementation as the kinds of sub-ingredients increased throughout the Joseon dynasty. We expect that the recipes and ingredients as well as the cooking methods recorded in these old articles will contribute to those looking for a healthy life and, furthermore, to the globalization of tteok.

Correlation between the Spirit of Times and Characteristics of Clothing -Similarity between Renaissance and Post-modern Period- (시대정신과 복식조형성과의 상관성(제1보) -르네상스와 포스틈던시대의 유사성을 중심으로-)

  • 박숙현
    • Journal of the Korean Society of Clothing and Textiles
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    • v.25 no.4
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    • pp.673-684
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    • 2001
  • The purpose of this study was to find out the correlation between the \"spirit of the times\" and the characteristics of each eras clothing in Renaissance and Post-modern Period. Theoretical studies about the \"spirit of times\" and the characteristics of clothing about each time were preceded. The results were as follows: Similarities of \"Spirit of times\" were 1) emphasis on humanity 2) anti-centralization 3) destruction of social status 4) deconstruction of christianity in Renaissance and modernism in Post-modern Period. Similarities of \"characteristics of clothing\" were 1) emphasis on erotic aspects of female body 2) emphasis of erotic aspects on clothing 3) tendency to revert to the old fashion 4) popularization of certain social groups fashion 5) tendency of deconstructionism in fashion 6) tendency of \"No match mix\" 7) androgynous style.f \"No match mix\" 7) androgynous style.ous style.

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A Historical Study on Horticultural Foods in Korea (한국(韓國) 원예식품사(園藝食品史)의 역사적(歷史的) 고찰(考察))

  • LeeKim, Mie-Soon;Lee, Sung-Woo
    • Journal of the Korean Society of Food Culture
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    • v.1 no.1
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    • pp.45-53
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    • 1986
  • The utilization of horticultural tools in Korea is historically viewed through limited materials. The garlic shown in the birth myth of the Korean nation appears to be the first record of horticultural foods. Only the fragmentary knowledge is available on the production and utilization of horticultural foods during the eras from Old Chosun to the Three States and the Unified Shilla. It seems that mutual exchange of horticultural foods between the Three States and neighbor countries was very active. Kinds of horticultural foods utilized were more variable in the era of Koryo dynasty. The situation on horticultural foods during Chosun dynasty is comparatively well known through published agricultural books and other literatures.

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Characteristics of German Contemporary Furniture ($1946{\sim}2005$) (독일 현대가구의 특성 분석 ($1946{\sim}2005$))

  • Cho, Sook-Kyung
    • Journal of the Korea Furniture Society
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    • v.17 no.2
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    • pp.69-79
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    • 2006
  • German furniture design had been downward in trend after Bauhaus closed and through the War. Meanwhile Italy emerged as a center in furniture industry after the Second World War. After the Unification in 1989, however, German furniture still play predominant role in the world since they have their own unique quality and territory. This study explores the significance of German furniture design by three different eras-Post-war recession (1946-1965), Arising times (1966-1989), Contemporary (1990-2005)-and categorized the major characteristics are summarized as in the below. First, function oriented design Second, pursuing perfection of technology Third, simplicity and purity of design.

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Analysis of Traditional Urban Morphology of Korean Contemporary City and Institutional Measures for Preservation

  • Choi, Min-Ah
    • KIEAE Journal
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    • v.14 no.2
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    • pp.47-59
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    • 2014
  • In the present circumstance of exploring measures for sustainable development, finding and using planning elements of historical city is getting important as a urban planning tool. Thus this study aims to examine the characters of Korean traditional urban form through three periods, Josun, modern and contemporary eras. Three urban centers representing different characteristics were selected; historical center based on 14th century's traditional planning, modern period urban center, which is related with development of railway, and contemporary urban center of late 20th century. Analyse of urban tissue, composed with form and scale of street network, blocks and plots, shows that each urban center of Seoul has certain common attributes in terms of morphology in spite of the difference of formation and development period. However this historical urban forms are rarely applicated in the current urban planning, such as new-town planning or district unit plan. This shows the necessity of modification of urban regulation for preserving the identity of our city and pursuing sustainable development.

Obesity: Interactions of Genome and Nutrients Intake

  • Doo, Miae;Kim, Yangha
    • Preventive Nutrition and Food Science
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    • v.20 no.1
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    • pp.1-7
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    • 2015
  • Obesity has become one of the major public health problems all over the world. Recent novel eras of research are opening for the effective management of obesity though gene and nutrient intake interactions because the causes of obesity are complex and multifactorial. Through GWASs (genome-wide association studies) and genetic variations (SNPs, single nucleotide polymorphisms), as the genetic factors are likely to determine individuals' obesity predisposition. The understanding of genetic approaches in nutritional sciences is referred as "nutrigenomics". Nutrigenomics explores the interaction between genetic factors and dietary nutrient intake on various disease phenotypes such as obesity. Therefore, this novel approach might suggest a solution for the effective prevention and treatment of obesity through individual genetic profiles and help improve health conditions.

A study on City and Architecture of the Utopia (유토피아의 도시.건축에 관한 연구)

  • Lee, Yil-Hyung
    • Journal of architectural history
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    • v.16 no.3
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    • pp.21-38
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    • 2007
  • If we take account of the 'Architectural Tradition' which aims a construction of better environment, we can see that this tradition has ended historically toward Utopia. It is a continual trend from ancient Greece to contemporary epoch in each transitional periods and especially in the Renaissance Era. Utopia is an ideal commonwealth in which inhabitants exist under perfect conditions, ideally perfect places or state of things. The plans of utopia are complete projects of image, its goal is an social, political and economical improvement according to the eras. Its plans are characterized by rigid geometrical pattern as circle and square, which contain generally center axis symmetry enclosure. Recent urban and architectural circumstances no longer reflect utopian visions. Since the latter of the 20th century, it appears dystopia on the contrary. Therefore, the utopian ideal city and architecture describes characteristics of the era unlike the continuity of its concept.

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