• Journal of Dental Rehabilitation and Applied Science
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• v.28 no.3
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• pp.233-243
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• 2012

The aim of this study was to evaluate time serial change of the TPTC(Tightness of Proximal Tooth Contact) between the implant prosthesis and natural tooth at rest state. Thirty-one patients(19 males and 12 females; mean age, 48.2 years) restored with a total 31 single-implant crowns in the left maxillary for 13 single-implant and left mandibular second molars for 18 single-implant crowns, respectively were selected. The TPTC was checked directly after delivery, 1 month after delivery and 6 months after delivery of prothesis at rest state. The TPTC decreased significantly as time goes by both maxilla(p<.01) and mandible(p<.05). The TPTC between the implant prosthesis and natural tooth decreased as time goes by after fixed implant prothesis placement.

• Korean Journal of Cognitive Science
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• v.21 no.4
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• pp.505-534
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• 2010

The purpose of this study was aimed to compare the lexical access and representation of semantic system in the bilinguals. The participants(late Korean-English bilinguals) performed the word-picture matching task. The task was to decide whether the pictures presented after the words(basic-level categories) represent the Korean(L1) or English(L2) words' meaning or not. The stimuli were consisted of common object belonged to four different categories(animal, part of body, clothes, tool). To control the translation strategies, the SOA(stimulus onset asynchrony) were manipulated as 650ms(Exp. 1) and 200ms(Exp. 2). In both experiment, the RTs were faster in L1 condition. The decision time of the part of body categories were shorter than the animal in L1 condition. In L2 condition, clothes were responded faster than the tools. The differences of the lexical access time implied that the bilingual semantic system seemed to be structured by more sub-level categories than the super-level, living or non-living things, and the ways to access the bilingual lexicon might be differentiated according to the languages.

• Journal of the Korean Wood Science and Technology
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• v.33 no.4 s.132
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• pp.53-59
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• 2005

This study was performed to understand the changes in wood extractives, mainly acetone extracts, in pine woods (Pinus densiflora and Pinus rigida) treated by three blue stain fungi (BSF) such as native BSF in Korea, Leptographium sp., screened Albino strain (BSFcs-1) and commercial Cartapip. BSF treatment has significantly reduced acetone extracts, 25.1~30.4% decreasing in red pine and 22.9~28.1% in pitch pine. The decreasing rates of fatty acids and sterols in woods were 10.6~11.2% by 3 week aging and 36~41.1% by BSF treatments, respectively. Triglycerides were also decreased to 5.68~9.4% by 3 week aging and 38.5~40.0% by BSF treatments, respectively. Resin acids were 6.1~11.3% by 3 week aging and 36~41.5% by BSF treatments, respectively. There were not so significant differences in extracts among native BSF and Albino-type strains (Albino strain, BSFcs-1, and commercial Cartapip). It was known that the Albino strain (BSFcs-1) screened for the biocontrol of wood discoloration has effectively decreased acetone extractives in pine woods.

• The Journal of Korean Academy of Prosthodontics
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• v.52 no.4
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• pp.324-330
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• 2014

In case of implant-tooth connected prosthesis, a natural tooth tends to intrude. There are several mechanisms that explain an intrusion phenomenon. So it is reco mmended not to connect an implant with a natural tooth. A 68-year-old female had upper left $2^{nd}$ premolar and $2^{nd}$ molar extracted and underwent implant surgery on the missing area. We made an implant prosthesis and treated upper left $1^{st}$ molar with a gold crown. 2.5 year later, the patient complained about loose proximal contact and food impaction between upper left $1^{st}$ molar and $2^{nd}$ molar. Mesial side of upper left $2^{nd}$ molar implant prosthesis was soldered so that proximal contact became tight again. But after 7 months, about 2 mm intrusion of upper left $1^{st}$ molar occurred, and the patient felt periodontally originated pain on intruded upper left $1^{st}$ molar. After the gold crown on upper left $1^{st}$ molar was removed, extrusion occurred and pain was relived.

• Economic and Environmental Geology
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• v.53 no.2
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• pp.183-196
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• 2020

This study aimed to recover native gold from the concentrate using microwave-nitric acid leaching and magnetic/hydro separation experiments. The insoluble-residue was filtered from leaching solution through microwave-nitric acid leaching experiment. As a result of the atomic absorption spectrometer(AAS) analysis of the filtered leaching solution, it was discovered that Au content was not eluted at all and it was observed from the back scattered electron(BSE) image that native gold was liberated in the insoluble-residue. When magnetic/hydro separation experiments were applied for the insoluble-residue, magnetic and non magnetic minerals were separtated from insoluble-residue. Magnetite was recovered from the magnetic minerals and as a result of applying the hydro separation experiment again for the non-magnetic mineral, native gold was recovered. The native gold was identified through the X-ray diffraction(XRD) analysis and BSE image.

• The Science & Technology
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• v.10 no.8 s.99
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• pp.40-42
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• 1977

우리는 산높고 물맑은 복된 땅에서 살고 있음을 얼마만큼 고맙게 여기고 있는가? 한국을 다녀가는 외국인은 이구동성으로 우리 고장의 기후, 특히 쾌청한 하늘을 부러워하고 맑은 그 고루 갖춘 사계절을 탐내고 떠나는 것을 본다. 니러나 이같은 환경이 언제까지나 보존될 것이며 물의 수급균형은 유지될 것인가? 늘어나는 서울의 인구와 이에따른 대기의 오염 급수난 우리의 자연을 다시한번 생각해 보자 자유재로 경시되던 물 "맑은물"이미 기원전 6세기에 그리이스 철인 타래스는 만물은 물로서 된다고 했다 물은 생명의 근원인가? 물의 값이 인정되는 오늘날 물을 아끼자 . 적절히 이용하자 목마른 사슴이 시내물을 사모하듯 그 고마움을 알자<다음글은 "자원정보"에서 옮긴 것임>

• 건강소식
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• v.35 no.6
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• pp.10-11
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• 2011

그 누구의 소유도 아니었던 대동강 물을 팔던 봉이 김선달의 일화는 더는 낯선 이야기가 아니다. 생수를 돈을 주고 사는 것이 익숙한 일상이 되어버렸고 '워터 카페'라는 말도 생소하지만은 않다. 생수까지 꼼꼼하게 따져 마시는 소비자에게 생수를 권하고 생수에 대해 알리는 생수감별사 정주호씨를 만났다.

• Water for future
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• v.37 no.4
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• pp.51-56
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• 2004

동서양을 막론하고 고래로부터 우리 인간과 물의 관계는 인류역사 그 자체라 할 수 있다. 인류문명의 발상지가 대부분 큰 강을 끼고 있었고, 오늘날도 수많은 도시가 하천 하류역을 중심으로 발달되어 있으며, 역사적으로도 물을 잘 다스린 나라는 번성하고, 그렇지 못한 나라는 쇠퇴하거나 멸망한 사례가 이러한 관계를 입증하고 있다.(중략)

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.437-440
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• 2010

연육 연도교에 주로 건설되는 초장대교량은 시설물 특성상 이용객들의 대피공간이 제약받고 태풍, 해일 등 자연재해에 노출이 많기 때문에 다른 공공시설물보다 재난에 취약한 구조물이다. 최근 공공시설물의 건설동향은 구조물이 장대화 되어가고 있어 재난 발생시 예상 위험이 점점 더 커지고 있다. 본 연구는 국내외 장대교량의 재난사고와 재난관리 사례연구를 통해 초장대교량에서 관리되어야 할 재난을 정의하였다. 초장대교량의 재난은 자연재해와 인적재해로 구분할 수 있는데, 자연재해로는 안개, 강설, 결빙, 강풍, 지진, 해일이 있으며 인적재해로는 교통사고, 화재, 테러, 선박충돌, 구조물 파괴 및 재료열화가 있다. 또한 초장 대교량에서 발생 가능한 모든 사고의 잠재가능성을 분석하여 가상의 재난관리 시나리오를 작성하였다. 이 시나리오는 예방, 대비, 대응 및 복구로 구분되는 관리단계별 실행계획 수립에 기초를 제공하게 될 것이다.

• Journal of the Korean Institute of Landscape Architecture
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• v.37 no.5
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• pp.1-12
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• 2009

The purpose of this research was to propose policy directions for the design and construction of nature-friendly park facilities (PF) in national parks. In order to do that, nature-friendliness evaluation indicators(NEIs) used in green building rating systems and related articles were reviewed. After the initial literature review was complete, NEIs for park facilities based on location, design, construction, operation, and management sectors were developed. Data was obtained through a questionnaire completed by 79 managers at 19 national parks in Korea in 2008. The answers were analyzed using descriptive statistical methods, a t-test, a multi-dimensional analysis, and a factor analysis. This research found that: 1) The results indicated that based on relative weight calculation, the location condition was evaluated as the most important; 2) The evaluation results regarding the degree of nature-friendliness of park facilities showed that location condition was ranked higher than design and construction--in addition, the evaluated values of indicators related to energy efficiency were ranked the lowest; 3) the level of nature-friendliness of shelter was given the highest level, but resting facility was the lowest level; 4) Overall, park facilities at Mt. Seorak, Mt. Odae, and Taean Coast national parks showed high levels of nature-friendliness. But park facilities at Mt. Gyeongju and Mt. Songni national parks showed low levels of nature-friendliness. The results of this research shall contribute to the establishment of tailor-made management policies, the development of detailed guidelines for increased energy efficiency and visitor satisfaction, and the preservation of ecosystems and natural resources in Korea's national parks.