• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.65-68
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• 2009

본 연구에서는 eagle 2000 glass위에 APCVD(atmospheric CVD)증착법으로 $SnO_2$:F 박막을 제조하였다. 공정 온도, doping 농도, TTC(Tin tetrachloride)와 $H_2O$, $CH_3OH$의 조성비를 공정 변수로 두었으며, 각 변수에 대한 전기적, 광학적 특성 및 결정성을 확인하였다. hall measurement를 이용 제작된 박막의 전기적 특성을 확인 하였고, uv-VIS spectroscopy, hazemeer를 이용 박막의 광학적 특성을 확인 하였다. 또한 XRD, FESEM, AFM을 이용 박막의 결정성 및 표면 특성을 확인 하였다. 박막의 결정성을 결정짓는 증착 온도의 경우 $590^{\circ}C$에서 완벽한 Tetragonal rutile 형태의 결정성을 보였으며 $SnO_2$:F film $1{\mu}m$ thickness에서 $10({\Omega}/{\square})$ 내외의 우수한 면저항값과 $30(cm^2/Vs)$ 이상의 mobility값을 확인 하였으며, 가시광영역대 에서 높은 투과율과 우수한 haze값을 얻었다.

• Journal of the Korean Institute of Educational Facilities
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• v.11 no.1
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• pp.39-46
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• 2004

The objective of this study is to propose the architectural basic data for the planning of kindergarten attached to the elementary school. For this study, we selected and investigated 23kindergartens in Gwangju city. The results of this study are as follows. 1) The elementary school in separated style had the advantage of securing educational space and reducing interference with students of elementary school. But it had the problem in using the facilities of elementary school. So we have to consider the kindergarten to be located near by dinning room, multi-purpose hall. 2) Concentrating the entrance, it makes the inside and outside space use easily. For the actual use, we have to establish facilities for convenience in outer-space. 3) For each room, we suggest guides as follow. The classroom and the playroom have to be combined for flexibility and supervision. In the planning of toilet, it must have sliding door for confirm the inside situation and reasonable height partition to consider the student's body-size. The shape of teacher's room must be open-type for supervising children but protect the entry of children. There is consideration for the material room and the sleeping room for all-day-long class.

• Journal of the Korean Electrochemical Society
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• v.10 no.1
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• pp.31-35
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• 2007

In this review article, we are going to explain the recent development of lithium secondary batteries for a cellular phone. There are three kinds of rechargeable batteries for cellular phones such as nickel-cadmium, nickel-metal hydride, and lithium ion or lithium ion polymer. The lithium secondary battery is one of the most excellent battery in the point of view of energy density. It means very small and light one among same capacity batteries is the lithium secondary battery. The market volume of lithium secondary batteries increases steeply about 15% annually. The trend of R&D is focused on novel cathode materials including $LiFePO_4$, novel anode materials such as lithium titanate, silicon, and tin, elecrolytes, and safety insurance.

• Journal of Digital Contents Society
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• v.16 no.3
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• pp.437-444
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• 2015

In this paper, we propose an information service system using augmented reality technology on mobile devices. With the advancement in ICT technology the computer is smaller and easy to carry and developed into the tablet PC and the smartphone typically. The user can confirm and learn the desired data using the augmented reality technology, regardless of the environment. Padding the supplementary images or videos to the real image using the camera, we can have help from such additionally obtained images. In this paper, using an augmented reality technology on a tablet PC or smartphone environment, we implement a system for providing information to the user. This system can be utilized in all areas such as learning, entertainment, public relations and advertisement, etc.

• Annual Conference on Human and Language Technology
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• 2004.10d
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• pp.35-39
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• 2004

본 논문은 실용적인 구문분석기의 전단계로서, 자동 구축된 구문패턴사전과 규칙을 이용하여 구묶음하는 방법을 제안한다. 우선 규칙은 구문분석 말뭉치(30,875어절)를 대상으로 자동 추출된 고빈도의 규칙(Rewriting Rule)을 본 논문에 맞게 수동으로 구축하였다. 규칙은 조건부, 행위부로 이루어진 이진 규칙(binary rule)의 형태를 이루며, 명사구(NP), 수식어구(AP, DP), 인용구(X), 용언구(VP, VC)을 대상으로 15개를 구축하였다. 그리고 구문패턴은 중심어와 중심어 선행 요소의 특성뿐만 아니라 중심어 후행 요소도 고려하여 형식화시킨 것으로, 중심어의 복합용언 여부에 따라 일반용언패턴과 본+보조용언패턴으로 구분한다. 부분적인 언어 현상의 처리보다는 실세계에서 사용되는 수많은 문장들에 내재되어 있는 매우 광범위한 언어 현상의 처리를 하기 위해, 구문패턴은 형태소주석 말뭉치(460만 어절)을 대상으로 자동 구축하였다. 구축된 구문패턴사전과 규칙을 이용하여 구묶음을 수행한 결과 정확율 83.09%가 나타났다.

• The KIPS Transactions:PartB
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• v.11B no.5
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• pp.587-596
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• 2004

During recent years, a new framework, which aims to bring a unified and global approach in indexing, browsing and querying various digital multimedia data such as audio, video and image has been developed. This new system partitions each media stream into smaller units based on actual physical events. These physical events within oath media stream can then be effectively indexed for retrieval. In this paper, we present a new approach that exploits audio, image and video features to segment and analyze the audio-visual data. Integration of audio and visual analysis can overcome the weakness of previous approach that was based on the image or video analysis only. We Implement a web-based multi media data retrieval system called XCRAB and report on its experiment result.

• Korean Journal of Optics and Photonics
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• v.11 no.5
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• pp.371-376
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• 2000

For multi-hologram recording especially in a dIsk-shaped storage medium. we had studied a simple cost-effective method to unplement the rotational, angular, and ,patial multiplexmg techniques together in order to enhance the area storage density. Holographic storage with both rotational and angular multIplexing was realized by controlling the rderence beam directly with a pair of wedge prisms. whlie the storage WIth spatIal multlplexmg by shIfting the storage medium. In thIS paper \ve show that lhe area storage density of our system is strongly dependent on f numbers of the lenses in the srgnal and reference anns, and also show that the area storage densrly becollles maximal when the f number of the lens in the signal arm is approximately twice as long for a given f number of the lens in the reference emn. e emn.

• 월간산업보건
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• s.247
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• pp.16-19
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• 2008

파라티온(Parathion)은 폭넓고 다방면으로 사용되는 유기 인계 해충 진드기의 살충제이다. 파라티온의 첫 번째 생물학적 반응은 콜린에스테라아제 효소의 활성도 저감이다. 파라티온의 다양한 수준의 동물 노출 실험 결과, 경구 투여량 0.5-6 mg/kg 수준에서 악영향이 관찰되었다. 인간의 경우 파라티온 0.1 mg/kg 이하 수준에서는 RBC 콜린에스테라아제 효소의 활성도 감소가 나타나지 않았다. $0.2-0.8\;mg/m^3$의 작업장 노출 수준에서는 RBC 콜린에스테라아제 효소의 감소가 관찰되었다. 본 연구 결과에 근거하여 흡입 노출농도 $0.35\;mg/m^3$에 해당되는 0.05 mg/kg 이하 용량에서는 파라티온과 관련한 건강상의 생물학적 장애 증상이 유발되지 않았다. 따라서 흡입성 에어로졸과 증기상 형태로 $0.05\;mg/m^3$의 TLV-TWA가 파라티온의 작업장 노출기준으로 권고되었다. 이 노출기준은 부교감 신경의 이상과 다른 생물학적 장애 증상을 예방하는 목적에서 설정되었다. 이 수치는 인간을 대상으로 한 연구에서 얻어진 NOAEL로부터 근거를 둔 것이고, 작업자들의 RBC 콜린에스테라아제 효소의 활성도 저하를 방지하는 용량에 해당되는 것으로 예상된다. 이러한 접근은 RBC 콜린에스테라아제 효소의 억제가 단독 사용자에게서는 나타나지 않는다는 것을 확인하는데 이용되는 Biological Exposure Index의 활용과 일치된다. 인간에게 있어 파라티온 피부노출이 죽음까지도 이를 수 있다는 임상적 증세와 연관되어 있기 때문에 피부경고주석이 권고되었다. 쥐들을 대상으로 한 사료 공급 연구들에서 파라티온의 노출을 통한 명확한 종양의 발생 증가가 관찰되지 않아 비발암성 물질(A4)로 설정하였다. 파라티온의 TLV-STEL과 SEN notation을 설정하기에는 아직 충분한 데이터가 확보되어 있지 않고 있으며 파라티온의 작업 노출 모니터링에 대한 자세한 정보를 얻으려면 아세털콜린에스터라제 억제 농약의 BEI 문서들을 참고하는 것이 필요하다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.11a
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• pp.384-389
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• 1999

Most document consists of primary content and supporting material, such as footnotes, detailed explanations, and illustrations, and the related supporting materials are linked as hypertext on web document. However the content of hypertext links Is appeared in the new windows on present web browser. Then the user will leave the primary material, may lose the entire context, and must have some difficulties to return to the primary context when the interest disappears. Using the technique for fluid links, we can solve these problems easily. If the mouse is putted on the link, the related material is presented in between lines or at margin maintaining the context of primary material. In this paper, we introduce the various browsing techniques using fluid links, analyze the forms and the features, and then we propose the best way to implement inJava.

• Journal of KIISE:Databases
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• v.30 no.5
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• pp.494-506
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• 2003

Recently, explosive popularity of multimedia information has triggered the need for retrieving multimedia contents efficiently from the database including audio, video and images. In this paper, we propose an XML-based retrieval scheme and a data model that complement the weak aspects of annotation and conent based retrieval methods. The Property and hierarchy structure of image and video data are represented and manipulated based on the Multimedia Description Schema (MDS) that conforms to the MPEG-7 standard. For audio contents, pitch contours extracted from their acoustic features are converted into UDR string. Especially, to improve the retrieval performance, user's access pattern and frequency are utilized in the construction of an index. We have implemented a prototype system and evaluated its performance through various experiments.