• Journal of the Korean Chemical Society
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• v.30 no.2
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• pp.237-242
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• 1986

(E,E)-p-Phenylene diacrylic acid derivatives were prepared in moderate to good yields by the palladium catalyzed vinylation of 4-bromoiodobenzene or 4-diiodobenzene with 2 equiv of acrylic acid derivatives in the presence of triethylamine. 4-Diiodobenzene was more reactive than 4-bromoiodobenzene in the above reactions and the reactions were proceeded stereospecifically. (E,E)-p-Phenylene diacrylic acid derivatives and several other 1,4-diolefinic aromatic compounds were also synthesized by utilizing the selective vinylation of 4-bromoiodobenzene.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.28 no.3
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• pp.122-130
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• 2010

The Study takes the rivers in Zhouzhuang - traditional Chinese Kangnam watery landscape as the object. The purpose of this study is to grasp the relationships between visual characteristics and the preference. The following is the research process: Firstly, the theoretical study of Zhouzhuang, the traditional Kangnam region in China, is conducted, the watery landscape is taken pictures, and 22 photos are selected. Secondly, in order to grasp the visual preference and landscape characteristics of the watery landscape in Zhouzhuang, 22 pictures and 25 pairs of adjectives are adopted for the questionnaire survey. Thirdly, in order to have a better understanding on the physical properties and effects of physical quantity on the preference, the occupation ratios of buildings and sculptures, natural elements, footpaths, bank revetments and other landscape elements are calculated, and the mean analysis, dispersion analysis and regression analysis are conducted. In order to grasp the landscape characteristics and preference factors, 25 pairs of adjectives are used to conduct the factor analysis. In order to grasp the effects of characteristics of visual factors on the preference, the dispersion analysis and regression analysis are carried out. The results are as follows: From the results of the landscape preference analysis, in the No.22 photo with the top preference, 11 pairs of adjectives, namely, "harmonious-disharmonious", "beautiful-ugly", "rural-urban", "soft-rough", "stable-instable", "romantic-realistic", "cheerful-gloomy", "brilliant-simple", "natural-artificial", "familiar-strange", and "clean-dirty" have positive effects on watery landscape. It can be viewed as the relatively important factor in the visual preference. In terms of the results of visual physical quantity analysis of traditional Chinese Kangnam watery landscape, the landscape with high occupation ratio of buildings and sculptures has positive effects on visual preference. The results of analysis of visual physical quantity and preference show that the preference degree increases as the occupation ratio of footpath area increases. The analysis results of visual characteristics of traditional Chinese Kangnam watery landscape identify four factors, namely psychological factor, cultural factor, condition factor and physical factor. It can be concluded from the results of analysis of the relationships between visual preference and visual characteristics that the return coefficient B of the psychological factor is +0.936. It can significantly affect the watery landscape, so it can be identified as the most important factor among the visual preference factors of Chinese Kangnam watery landscape.

• The Journal of Korean Academy of Prosthodontics
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• v.62 no.2
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• pp.157-164
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• 2024

A variety of digital technologies are being used throughout the entire implant treatment process of diagnosis, surgery, impression, design, and fabrication of prostheses. In this case, using a digital surgical guide, sinus floor elevation was performed without complications, and the implants were placed in the planned position. After the healing period for osseointegration, CAD-CAM (Computer-aided design-Computer-aided manufacturing) customized abutments and provisional prostheses were delivered. While using the provisional prosthesis, occlusal change was observed. To transfer the intermaxillary relationship and abutment position that reflect occlusal change and axial displacement, double scanning and abutment-level digital impressions were taken. Abutment superimposition was used to capture the subgingival margin without gingival retraction. Then, the definitive prosthesis was designed and fabricated with digital system. We report a case applying digital system, to achieve the predictable result as well as the efficient treatment process from implant surgery to fabricating prosthesis in the posterior area.

• Spatial Information Research
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• v.16 no.2
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• pp.207-218
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• 2008

Providing services in a wireless environment with existing wired-based GIS solutions have many limitations such as slow communication, processing rates and screen size. This study suggested data optimization techniques in a mobile environment to overcome those limitations in four steps. In order to test the methods suggested in the study, experiments are conducted using Gangnam-gu as a test site. An existing GIS engine built in a wired environment was compared with the optimized GIS engine from the study in terms of performance in the same environment. They were also compared and analyzed in terms of response data size, number of requests processed per second, and average time to process a request. The results proved that the proposed engine shows significant improvements in performance compared with the wired GIS.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.155-156
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• 2012

최근 항만과 해역의 안전성확보가 국제경쟁력의 주요 요인 중 하나로 대두됨에 따라 해상교통관제센터의 효율적인 운영과 관제사의 능력이 강조되고 있으며, 국제적으로 해상교통관제시스템과 관련된 사업이 팽창되고 있어 이와 관련된 국산화 기술 확보가 시급한 실정이다. 하지만 국내의 경우 해상교통관제시스템과 관련된 국산화 기술이 미미하며 해상교통관제에 사용되고 있는 시스템 및 해상교통관제사의 교육에 이용되는 시뮬레이터 개발이 전무하여 문제발생 시 해외제작사에 의존해야하며 교육을 위한 개선사항과 요구사항의 반영에 어려움이 있다. 따라서 본 연구에서는 해상교통관제(VTS) 시뮬레이터를 이용한 해상교통관제사들의 학습능률을 극대화하고, 개발된 해상교통관제(VTS)시뮬레이터의 국내 외 시장경쟁력을 확보하기 위하여 해상교통관제(VTS) 시뮬레이터의 권고 규정 분석 및 설문조사를 통한 해상교통관제사들의 사용자 요구사항을 분석하고자 한다.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.125-126
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• 2013

본 연구는 부동산 시장을 지역별(서울 강남, 강북지역) 및 주택형태별(아파트, 단독주택, 연립주택)로 분류하여 주식시장 및 각 형태별 주택시장의 수익률 동조화현상을 비교분석하였다. 또한 각 자산 간의 수익률을 1998년도 외환위기와 2008년도 글로벌 금융위기를 전후로 비교하여 기간 간의 수익률 및 수익률 변동성 차이에 대해서 분석하였다. 구분된 시기별로 각 자산의 수익률은 첫째, 주택시장은 주식시장과는 동조현상이 없는 것으로 분석되었으며, 둘째, 지역별 및 주택형태별 시장은 서로 동조현상이 있으나 그 정도는 시기에 따라 차이가 있는 것으로 분석되었다.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.12 no.3
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• pp.12-24
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• 2001

The key advantage of LTCC(low temperature co-fired ceramics) technology is the ability to integrate passive components such as resistors, capacitors, and inductors. More compact circuits with an increased scale of integration are needed with the development for advanced telecommunication system such as IMT-2000. LTCC technology can be obtained by removing these elements from the substrate surface to inside of ceramic body. And it can miniaturize the wireless phone through integration of planar patch antenna, duplexer, band pass filter, bias line, circuit of impedance matching and RF choke etc. Futhermore, with the multilayer chip process and its outstanding electrical material characteristics, LTCC is predestined for highly-integrated, cost effective wide band applications. This paper focuses on the general description of LTCC MCM technologies and the fabrication of the multilayer VCO module.

• Journal of Korea Spatial Information System Society
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• v.11 no.4
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• pp.74-84
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• 2009

GIS based new postal marketing method is presented in this paper with spatiotemporal mining to cope with domestic mail volume decline and to strengthening competitiveness of postal business. Market segmentation technique for socialogy of population and spatiotemporal prediction of consumer propensity to purchase through spatiotemporal multi-dimensional analysis are suggested to provide meaningful and accurate marketing information with customers. Internal postal acceptance & external statistical data of local districts in the Seoul Metropolis are used for the evaluation of geo-lifestyle clustering and spatiotemporal cube mining. Successfully optimal 14 maketing clusters and spatiotemporal patterns are extracted for the prediction of consumer propensity to purchase.

• Korean Journal of Heritage: History & Science
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• v.41 no.2
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• pp.79-97
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• 2008

Four Wangs' landscape style (四王山水畵風), which had appeared in Beijing in the early 18th century, widely spread to Korea and Japan in the 19th century and became a significant basis for developing new painting styles in both countries. It was first introduced to Korea by Shin Wi (申緯) and Kim Jeong-hee (金正喜) who associated with literary men of the Qing Dynasty. Being influenced by them directly or indirectly, Shin Myeong-yeon (申命淵), Yi Han-cheol (李漢喆), Yu Suk (劉淑), Changv Seung-eop (張承業), An Choog-sik (安中植), and Jo Seok-jin (趙錫晋) attempted to adapt Four Wangs' landscape style and it later became a main Stream painting style of the Korean painting circles. Based on Four Wangs' landscape style, their landscape paintings had something in common in that they captured natural features from a short distance using the Down-Up prospective and placed guardian mountains across mountain streams by making a tall tree in the right or left bottom of the canvas as the starting point. However, recently unveiled court painter An Geon-yeong (1841~1876)'s the Landscape Screen is remarkable in that it is based on Four Wangs' style, which was in fashion in the late 19th century, but shows different aspects from other Four Wangs' style paintings in terms of feature capturing, brush stroke and colors. While most of An Geon-yeong's existing paintings are small ones, this folding screen is a big piece consisting of six-fold landscape paintings. In particular, it shows new aspects by creating a serene and calm atmosphere through the description of various landscape scenes with thin brush strokes using glossy ink, by showing a macroscopic view in some paintings through feature capture using a birds-eye view method, and by giving life to the canvas through smoke and clouds. This painting style is considered to be linked with those of Wang Xue-hao (王學浩, 1754~1832), Tang Yifen (湯貽汾, 1778~1853) and Dai Xi (戴熙, 1801~1860), based on Four Wangs' style in the early 19th century's Jiangnan Circle (江南 畵壇), who tried to express the energy and vitality of real landscapes by going around China's well-known mountains and complementing painting styles with drawing from nature. Therefore, An Geon-yeong's six-fold Landscape Screen is very significant as a rare case proving the introduction and reception of Jiangnan Circle's Four Wangs' landscape style which was different in many aspects from Beijing Circle in the 19th century.

• Journal of The Korean Association For Science Education
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• v.33 no.6
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• pp.1119-1138
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• 2013

It has been a decade since argument and argumentation were introduced in science education literature in South Korea. The word "argument" has been translated into three different Korean terms in literature. The purpose of this study was to clarify those translated terms by examining how the terms were defined and used in Korean education research literature. From a philosophical perspective on the diversity of translation, we examined definitions of argument and argumentation, research topics in papers published in major international journals on science education, and reviewed relevant science education papers published in South Korean journals. We reviewed 79 papers published since the year 2000 in major international journals on science education, whose titles have terms argument and/or argumentation and 37 Korean science education papers whose titles have terms translated from the two English words. Findings showed that Korean researchers defined argument and argumentation either in a general sense or in a specific sense such as science investigation or group work aspects, depending on research contexts. Researchers in Korea rarely mentioned the diversity of translation. If they mentioned it, justification for a specific translation of the term was not provided except for in one case. When the same foreign literature was reviewed to define "argument" or "argumentation, different Korean words were used to translate the same two terms. This indicated to the researchers that the translation of the terms was not related to their definitions of them. On the other hand, each research group used a certain translation of the term consistently, indicating that translations might be based on research tradition. Based on the findings, a position on translation of the term is proposed in terms of professionalism and communication between research groups.