• Digital Contents
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• no.4 s.155
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• pp.35-38
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• 2006

우리나라 국민 1인당 독서량은 OECD 가입 국 중 최저 수준이다. 수치상으로는 거의제로에 가깝다. 이런 척박한 현실 속에서 전체 서적시장의 10분의 1규모에도 채 미치지 못하는 전자책업계가 희망을 찾고 있다. 우선 성장세가 두드러진다. 국내 전자책 시장은 2005년에 2004년 대비 두 배 가까이 성장했고, 올해는 지난해의 세 배가 넘는 1,500억 원 규모의 시장이 형성될 것이란 전망이 대세다. 유비쿼터스(u)북 등 새로운 이슈를 통해 전기를 마련해 나가고 있는 국내 전자책 시장을 분석했다.

• Digital Contents
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• no.1 s.152
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• pp.38-41
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• 2006

월간 "디지털콘텐츠"는 지난달 7일 '2006년 디지털콘텐츠(DC)산업의 과제와 전망'을 주제로 신년특집 좌담회를 개최했다. 보지 이창한 편지장의 사회로 진행된 이번 좌담회는 곽종철 정보통신부 IT정책자문단 SW/DC PM,권강현 삼성전자 디지털솔루션센터 상무, 권택민 한국소프트웨어진흥원(KIPA) 디지털콘텐츠사업단장, 위정현 중앙대 상경학부 교수(가나다 순)등이 패널로 참석.DC산업 전반에 대한 열띤 토론을 펼쳤다. 특히 참석자들은 디지털컨버전스등 컴퓨팅 환경 변화에 따른 새로운 DC의 필요성 여부, 대기업의 DC시장 진출 문제,DC 수출 편중 현상 등 현 DC업계 이슈에 대한 갑론을바을 벌였다.

• Digital Contents
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• no.1 s.152
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• pp.104-113
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• 2006

정보통신부가 후원하고 한국데이터베이스진흥센터가 주관한 '공공정보 활용 촉진에 관한 법률(안)(이하 공공정보 활용 촉진법)제정을 위한 공청회가 지난달 23일 프레스센터에서 열렸다. 이미EU, 미국 등 선진각국에서 공공정보의 재이용에 관한 법제화가 진행되고 있는 가운데 마련된 이번 공청회에서는 정보서비스 관련 사업자,시민단체,대학교수 등 사회 각계의 전문가들이 패널로 참여해 공공정보 활용 촉진 필요성과 향후 법률 제정 방향에 대한 심도 있는 토론을 펼쳤다. 특히 패널들은 공공정보 활용의 취지에 대해서는 일치된 견해를 보인 반면 법률(안)에서 담고 있는 민간사업자의 의무 권리부문등 각론에 들어가서는 이견을 보이기도 했다.

• Digital Contents
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• no.10 s.161
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• pp.48-49
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• 2006

정보통신부가 주최하고 한국데이터베이스진흥센터(이하 한국DB진흥센터)가 주관한 공공정보 유통 지원 사업 세미나가 '공공정보를 활용한 정보서비스 시장 활성화 전략'이라는 주제로 지난달 13일 대한상공회의소 국제회의실에서 열렸다. 이날 행사는 공공정보의 상업적 활용에 대한 타당성 측면에 초점을 맞췄던 기존 세미나에서 한 발 더 나아가 보다 효율적인 유통체계를 마련하기 위한 실질적인 구현 방안에 무게중심을 두었다는 점에서 주목을 받았다.

• Digital Contents
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• no.7 s.158
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• pp.52-55
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• 2006

일반적으로 검색엔진이라고하면 웹 포털이 불특정 다수를 대상으로 한 검색 서비스를 지칭하지만, 일반 기업이나 공공기관이 자사의 다양한 콘텐츠를 관리하기 위한 수단으로써 활용하는 경우가 있다. 바로 기업용 검색엔진(이하 검색엔진)이다. 지난해 국내 검색엔진 시장은 라이선스 기준으로 200억원 내외였다. 국내SW산업의 시장규모가 2조원을 훌쩍 넘기는 현실을 감안하면 보잘것 없는 수치이지만 검색엔진의 IT 인프라적성격을 이해하면 얘기는 달라진다. 폭발적으로 늘어나는 데이터에서 필요한 정보를 습득하기위해서는 검색엔진이 필수적이기때문. ‘작지만 큰 시장’인 국내검색엔진시장을 분석했다.

• The Journal of the Petrological Society of Korea
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• v.1 no.2
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• pp.104-123
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• 1992

We present petrography, mineral chemistry of amphibole and plagioclase, and major and trace element chemistry for the Ogcheon metabasites occurring in the Poun and Mungyong areas to understand metamorphism, and to define chemical characteristics of parental rocks and their implication for tectonic environment. The Ogcheon metabasites often preserve relict igneous textures, although no primary phases are observed. They are mainly composed of amphibole (actinolite+hornblende)+plagioclase+epidote+chlorite+sphene+opaque oxides, indicating epidote amphibolite facies metamorphism. Coarse-grained amphiboles frequently have actinolitic composition in the core, and hornblende along the margin and cleavage, which can be interpreted either as miscibility gap or as result of polymetamorphism. Although presumed polymetamorphic events in the Ogcheon supergroup favor the latter possibility, further metamorphic studies are necessary to solve the problem. Amphibole and plagioclase chemistries suggest greenschist (epidote-amphibolite, if miscibility gap is present) to amphibolite facies metamorphism of possibly medium pressure. The major and trace element data of whole rocks indicate that the Ogcheon metabasites are transitional to tholeiitic basalts belonging to within-plate environment. Absence of evidences indicating deep sea environment suggests that the Ogcheon metabasites emplaced in an intra-cratonic, possibly rift environment which failed to proceed to an oceanic rift. Chemical variation of the metabasites toward a granitic pluton indicates K loss closer to the pluton, suggesting that caution should be taken when K is involved in a discussion.

• Journal of the Mineralogical Society of Korea
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• v.21 no.2
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• pp.177-182
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• 2008

The Gemological characteristics of B.C. jade from Cassiar Mine, British Colombia, Canada, have been investigated, using polarizing microscopy, Mohs' hardness, refractive index and density measurements, X-ray powder diffraction, X-ray fluorescence spectrometry, ICP-MS, Infrared absorption spectrometry, and DTA/TGA. The B.C. jade is deeply green (spinach peen or olive green) in color and is translucent. It shows a resinous or waxy luster. The principal mineral of the material is tremolite-actinolite solid solution and minor amount of Cr-garnet and unidentified opaque minerals are accompanied. Mohs' hardness value ($5.5{\sim}6$). refractive index (1.62), and specific gravity (3.01) are measured. It is very highly tough and shows hackly fracture. The high Fe content ($Fe_2O_3\;4.14{\sim}4.66\;wt%$) in B.C. jade is attributable to a deepening of green color of the material. The B.C. jade starts to dehydrate at v and dehydration is completed at $1000.8^{\circ}C$, transforming tremolite-actinolite solid solution to enstatite, diopside, quartz, and water in its place. This possible reaction is supported by the weight loss of B.C. jade (1.93 wt%) at $1000.8^{\circ}C$ indicated by TGA curve.

• Proceedings of the Korean Geotechical Society Conference
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• 2008.10a
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• pp.475-483
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• 2008

It is necessary to develop a national design method for surface reinforcement of very soft ground because most current design works rely on crude empirical correlations. In this paper, the mechanical behavior of very soft ground that is surficially reinforced was investigated with the aid of a sents of numerical analysis. Several material properties of each dredged soft ground, reinforcement and backfill sand mat have been exercised the numerical analysis in order to compare the result of numerical analysis with those of the laboratory model test. Through the matching process between the numerical and experimental result, it is possible to find the appropriate material properties of the dredged soft ground, reinforcements and backfill sand mat. These verified material properties permit to show the effect of the stiffness of reinforcement and the thickness of sand mat on the overall deformation.

• Economic and Environmental Geology
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• v.31 no.3
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• pp.171-183
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• 1998

Early Tertiary volcanics, volcanoclastics and granodiorite occur in the Barton Peninsula, King George Island, Antarctica. In the granodioritic stock and volcanic rocks, propylitic alteration characterized by actinolite, epidote, chlorite and calcite is widespread, and disseminations and veinlets of sulfide minerals such as pyrite, chalcopyrite and bornite are ubiquitious. The study on the hydrothermal alteration near granodioritic stock can be summarized as follows; (1) granodiorite intrusion is a small, high level stock associated with calc-alkaline volcanism, and have high copper content, (2) high temperature type of propylitic alteration and common occurrence of copper sulfides in and around granodiorite intrusion, (3) low ${\delta}^{34}S$ values of pyrites by oxidational conditions of sulfide deposition, (4) low ${\delta}^{34}S$ values of quartz and feldspar in the granodiorite, and isotopic non-equilibrium by hydrothermal alteration. It suggest that hyrothermal alteration and mineralization near granodioritc stock should be genetically related to granodiorite intrusion in the Barton Peninsula.

• Journal of the Mineralogical Society of Korea
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• v.23 no.4
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• pp.413-428
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• 2010

The Gukjeon Pb-Zn mine was recognized as skarn deposits which replaced the limestone layer of the Jeongkansan Formation by intrusion of biotite granite in late Cretaceous. The Jeongkansan Formation is mainly composed of tuffaceous shale, and interlayers of sandstone, andesitic tuff, limestone, and conglomerate. The limestone layer is located in the lower part of the Jeongkansan Formation with 6~8 m in thickness and about 500 m in length. The Gukjeon deposits are divided into the Jukgang ore bodies once mined underground and the eastern ore bodies. Main ores are sphalerite and galena, in association with small amounts of chalcopyrite, arsenopyrite, pyrite, and pyrrhotite, etc. Skarns mainly consist of clinopyroxenes and Ca-garnets, associated with actinolite, chlorite, axinite, and calcite, etc. The Jukgang ore bodies show symmetrical distribution of zoning outward, representing clinopyroxene (hedenbergite) zone, clinopyroxene-garnet (grossular) zone, garnet (andradite) zone, and alteration zone of hornfels. $Fe^{2+}$ contents in clinopyroxenes increase with decreasing sphalerite grade. Sphalerite ores are found in all zones and $Fe^{2+}$ contents in sphalerite increase in the same way as those in clinopyroxenes, implying that clinopyroxene and sphalerite are closely related each other. It is concluded that the Gukjeon ores occurred in the ore rich zone of high grade sphalerite with less pyrite in assoication with clinopyroxene.