• Journal of the Korea Society of Computer and Information
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• v.16 no.1
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• pp.19-29
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• 2011

As people have heightened attention to blogs that are individual media, a variety rank algorithms was proposed for the blog search. These algorithms was modified for structural features of blogs that differ from typical web sites, and measured blogs' reputations or popularities based on the interaction results like links, comments or trackbacks and reflected in the search system. But actual blog search systems use not only blog-ranks but also search words, a time factor and so on. Nevertheless, those might not produce desirable results. In this paper, we suggest a topic-rank technique, which can find blogs that have significant degrees of association with topics. This technique is a method which ranks the relations between blogs and indexed words of blog posts as well as the topics representing blog posts. The blog rankings of correlations with search words are can be effectively computed in the blog retrieval by the proposed technique. After comparing precisions and coverage ratios of our blog retrieval system which applis our proposed topic-rank technique, we know that the performance of the blog retrieval system using topic-rank technique is more effective than others.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.29 no.4
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• pp.438-449
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• 1996

Development of alimentary tract and nutrient absorption in embryo of the viviparous teleost surfperch, Ditrema temmincki were investigated with histochemical methods. Just after hatching mouth of the embryo was opened, and the end part of alimentary tract was opened in TL 4.0 mm. Mucosal folds in the alimentary tract appeared at posterior region from TL 5.0 mm. In TL 30.0 mm, the alimentary tract of the embryo could be distinguished into pharynx, esophagus, anterior intestine, mid intestine, posterior intestine, rectum and anus. From over TL 50.0 mm, the internal histological patterns of the alimentary tract showed similar structures as seen in the adult. The mucous cells in the pharynx were positively reacted to PAS in TL 7.0 mm. PAS positive goblet cell appeared in the intestine from 25.0 mm, from TL 30.0 mm in the rectum, from TL 40.0 mm in the anus and from 50.0 mm in the esophagus. Yolky materials were absorbed completely in TL 6.0 mm. PAS positive polysaccharide absorptive cells began to appear at the posterior parts of the intestine in TL 7.0 mm and appeared in TL 13.0 mm at the rectum, in TL 15.0 mm at the anterior intestine and in TL 40.0 mm at the anterior part of anus. During the gestation period, nutrient absorptive type of the embryo within the maternal body is a placental analogues type of metrotrophy.

• Journal of Environmental Impact Assessment
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• v.25 no.1
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• pp.25-40
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• 2016

This study suggests direction of new ordinance establishment for the future national application of Low Impact Development(LID) by analyzing current LID-related regulations of local governments, substantial agents to install and maintain a facility, through qualitative and quantitative methodologies. Four key words related to LID were derived from advisory conference and then ninety nine ordinances as the LID-related regulations were extracted to analyze. The study shows that rainwater-related ordinance passed in the middle of 2000s are being merely converted to the law on the promotion and support of water reuse. Regulations on water cycle and LID exist only in three cities nationwide(Seoul City, Suwon City and Namangju City). Interview with administrators of three cities to have LID-related regulations revealed following results. First, both rainwater and water reuse related regulations have not considered regional characteristics such as rainfall intensity, effects of impervious and merely followed guidelines by Ministry of Government Administration and Home Affairs. Second, existing ordinance is confined to specific facilities and thus cannot include the concept of LID which covers land and space utilization. Therefore, for proper application of LID, this study proposes issue of ordinance that resembles Seoul City ordinance and a new guideline that can reflect regional characteristics such as rainfall and location.

• Journal of Practical Agriculture & Fisheries Research
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• v.22 no.1
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• pp.113-129
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• 2020

In this study we examined the topic analysis and correlation analysis by text mining to extract meaningful information or rules from the self introduction letter of freshman at Korea National College of Agriculture and Fisheries in 2020. The analysis items are described in items related to 'academic' and 'in-school activities' during high school. In the text mining results, the keywords of 'academic' items were 'study', 'thought', 'effort', 'problem', 'friend', and the key words of 'in-school activities' were 'activity', 'thought', 'friend', 'club', 'school' in order. As a result of the correlation analysis, the key words of 'thinking', 'studying', 'effort', and 'time' played a central role in the 'academic' item. And the key words of 'in-school activities' were 'thought', 'activity', 'school', 'time', and 'friend'. The results of frequency analysis and association analysis were visualized with word cloud and correlation graphs to make it easier to understand all the results. In the next study, TF-IDF(Term Frequency-Inverse Document Frequency) analysis using 'frequency of keywords' and 'reverse of document frequency' will be performed as a method of extracting key words from a large amount of documents.

• Restorative Dentistry and Endodontics
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• v.36 no.6
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• pp.506-509
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• 2011

The development of subcutaneous emphysema is a well-known complication that has been reported after dental extraction, endodontic treatment, or restorative preparation. Gaseous invasion, leading to swelling, crepitus on palpation, is commonly restricted to the connective tisssues immediately adjacent to the entry site. However, the use of compressed air- and water-cooled turbines may allow large amounts of air and water to be driven through the fascial planes into the mediastinum, pleural space, or even the retroperitoneum. This case report is about the patient who presented with subcutaneous emphysema that occurred after fracture line inspection. Possible cause, treatment, and prevention of emphysema will be discussed.

• 한국신재생에너지학회:학술대회논문집
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• 2008.05a
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• pp.374-377
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• 2008

비정질 Si박막 태양전지의 후면 반사층을 위한 ZnO:Al TCO박막을 RF Magnetron Sputtering 방법으로 증착하였으며 이의 전기적, 광학적 특성 및 구조를 최적화하였다. Sputtering의 공정변수인 증착 RF 파워, 기판온도, 타겟-기판 거리, 증착압력을 변화시켜 ZnO:Al 단일막의 전기적, 광학적 특성을 최적화 하였고,이를 소면적 태양전지 셀 및 모듈에 적용하였다.그 중 증착 RF파워 및 압력이 단일막의 전기적,광학적 특성에 타겟-기판거리는 박막의 균일도에 큰 영향을 주었다. 압력에 따른 박막의 치밀도를 SE EMA방법으로 정량화하였고, 광학적, 전기적 특성과 연관하여 해석하였다. ZnO:Al 박막의 물성을 최적화하여 태양전지 셀에 적용한 결과 두께 80nm에서 가장 큰 Jsc의 증가를 보였고, 적용 전에 비해 약 18%의 광변환효율의 증가를 얻었다. 최적화된 태양전지 셀의 광변환효율은 9.9%, 모듈 효율은 7.4%였다.

• Conservation Science in Museum
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• v.13
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• pp.71-80
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• 2012

So-hwan earring(small hoop earing) is orbicular earring that have only main hoop. In this study, So-hwan earring from Baekje tombs are analyzed scientifically and those is attempted to find the correlation between scientific results and historical constituent. Six earrings were excavated from Habjung-ri sites in Buyeo and formative features and material characteristics of them were analyzed by microscope and XRF. As a results, various toreutics about producing gold silver alloy, pressure welding and amalgam plating that existed in Baekje from Ungjin period to Sabi period.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.7B
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• pp.1331-1341
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• 1999

This paper propose WebDBs(Web Database system) which retrieves information registered in web using query language similar to SQL. This proposed system automatically extracts information which is needed to retrieve from HTML documents dispersed in web. Also, it has an ability to process SQL based query intended for the extracted information. Web database system takes the most of query processing time for capturing documents going through network line. And so, the information previously retrieved is reused in similar applications after stored in cache in perceiving that most of the web retrieval depends on web locality. In this case, we propose cache mechanism adapted to user applications by storing cached information associated with retrieved query. And, Web search engine is implemented based on these concepts.

• Journal of Korean Library and Information Science Society
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• v.39 no.4
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• pp.215-235
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• 2008

The purpose of this study aims to provide possible suggestions for the improvement of the literature classification number system as the search and browsing device on the library homepage. After analyzing and evaluating literature classification number system as the search and browsing device on the homepage of library adopting DDC, suggestions for the improvement were proposed. For the purpose of maximizing the effectiveness of literature classification number system as the browsing device, DDC third summary(the thousand section) which is suited to domestic circumstances was prepared.

• The Journal of Korean Association of Computer Education
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• v.14 no.1
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• pp.123-135
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• 2011

In this paper, we propose a system that starts with the searching result of user's query and continuously offers new keywords related to the query. The primary purpose of the proposed system is to help users find information that the users cannot explain clearly. The proposed system obtains useful information by connecting different information sources, represents the information under an integrated schema, and offers a cross searching environment. In addition, it presents a visualized diagram that shows relations between keywords so that users can easily find the desired information. Therefore users can find information easily in an envirionment that is not limited to a certain site.