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박익근 ( Ik Keun Park ),박은수 ( Un Soo Park ),김현묵 ( Hyun Mook Kim ),안형근 ( Hyung Keun Ahn ),김정석 ( Chung Soek Kim ),권숙인 ( Sook In Kwun ),변재원 ( Jai Won Byeon ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.1
It is very important to evaluate the surface or subsurface microstructure because of th on mechanical properties of materials. Surface SH-wave which is horizontally polarized traveling along near surface and subsurface layer is an attractive technique for material difficulty in preparing specimens form in-service industrial facilities. In this stud evaluation for degraded structural materials used at high temperature by Surface SH-wave discussed. 2.25Cr-lMo steel specimens which were prepared by the isothermal aging heat tr 650° were evaluated by ultrasonic nondestructive evaluation techniques investigating th velocities, attenuation coefficient and amplitude spectra etc. In addition, it has verif the frequency-dependence of ultrasonic group velocity and attenuation coefficient using wav
사교육 시간에 따른 외현화 문제와 내면화 문제의 성별 차이
송정은(Jungeun Song),전덕인(Duk-In Jon),석정호(Jeong Ho Soek),홍나래(Narei Hong),김영신(Young Shin Kim),홍현주(Hyun Ju Hong) 대한소아청소년정신의학회 2010 소아청소년정신의학 Vol.21 No.1
Objectives:The purpose of this study was to evaluate gender differences with respect to the internalization or externalization of symptoms according to the amount of time spent engaged in extracurricular education. Methods:The study included a community sample of 755 boys and girls (mean age, 6.6 years), collected from five elementary schools in Gunpo, South Korea. Primary caregivers completed a questionnaire which included information on demographics, the amounts of time children spent in extracurricular education and with other activities, and an adapted form of the Behavior Assessment System for Children (BASC-2). Gender differences regarding externalizing and internalizing behavior problems were examined according to extracurricular education. Results:With respect to the boys, there was a difference in the frequency of those who had externalizing behavior problems according to their time spent in extracurricular education. In contrast, the girls exhibited no difference. With respect to those children who spent a lot of time engaged in extracurricular education, there was a gender-specific difference only with respect to externalizing behavior problems. Conclusion:A gender-specific difference exists only in terms of externalizing behavior problems according to time spent engaged in extracurricular education.
최용석,권혁인,Choi, Yong-Soek,Kwon, Hyeog-In 한국데이터전략학회 2006 Journal of information technology applications & m Vol.13 No.4
Recently, Development of IT and digital-tech, and this is becoming factor of digital contents industry development. But, problem that is more suitable e-business model's necessity and quality enemy of distribution web-site to digital contents as transaction this firm dispute by transaction special quality and Payment-system increase of digital contents increases rapidly was risen. In this study, Digital Contents qualify estimation very important persons of digital contents as sequence of study that investigate from target's viewpoint which is serviced through web-site that digital contents is not factors of web-site service method whether digital contents distribution web-site factors effect that is some in customer satisfaction from general viewpoint of actuality digital contents distribution and is the actual proof enemy. This paper's goal that these study finding leads as digital contents industry discusses individual enterprise's success and failure as field of business in quickening period yet but domestic digital contents industry field will be roared and may can have competitive power by enterprises which wish to already started business or inaugurate an enterprise enter in field with successful beginning and direction and develop continuously.
암모니아 산화 세균 Nitrosomonas sp. PK1의 분리 및 특성
김대경,김현국,이종석,서근학,김성구,공인수,Kim, Dae-Kyung,Kim, Hyun-Kuk,Kim, Jong-Soek,Suh, Kuen-Hack,Kim, Sung-Koo,Kong, In-Soo 한국생명과학회 1997 생명과학회지 Vol.7 No.2
양어장에서 어류의 배설물 및 어류에 의해 소비되지 않고 있는 사료에 의한 암모니아성 질소이 제거를 위한 수처리 공법의 하나로써 질산화세균 및 탈질화 세균을 이용한 고정화 방법의 개발을 위해서는 우수한 암모니아 산화능력이 있는 미생물의 분리가 절대적이다. 이를 위하여 여러 곳으로부터 분리한 암모니아 산화 세균 가운데 생유깅 빠르고 $NO_{2}$ 생성이 뛰어난 Nitrosomonas sp. PK1을 선별하였다. 분리된 균의 생육에 따른 $NO_{2}$ 생성은 non-growth asso-ciated pattern을 보여주고 있었다. 또한 생육에 영향을 미치는 탄소원 가운데 glucose가 생유게 가장 좋았으나 농도가 0.1% 이상에서는 오히려 $NO_{2}$생성이 감소되었다. 따라서 고정화 방범에 이용하기 위해서는 생육과 $NO_{2}$생성 능력이 유지를 위한 적절한 생육 배지의 필요성을 보여주었다. Ion 첨가에 의한 영향을 검토한 결과 $ZnCl_{2}$의 첨가가 생육 및 $NO_{2}$ 생성량의 증가를 보여 주었으며 그 농도는 1~10mM로서 제한적임을 나타내었다. To remove dissolved $NH_{4}$$^{+}$ in the aquaculture system, one ammonia oxidizing bacterium, Nitrsomonas sp. PK1, was isolated from samples collected in many aquacultural place and sludges of waste water. The stationary phase of this atrain was reached after 9 days, and the maximum $NO_{2}$ production was shown from 3 days to 9 days. In the selective medium, 0.1% of glucose was the good carbon source for growth. However, the $NO_{2}$productivity was repressed by the addition of glucose to the medium. When $Zn^{++}$ ion was supplemented to the medium, growth and the $NO_{2}$ productivity was increased, 10mM of $ZnCl_{2}$ was the optimal concentration for growth and 1 mM of $ZnCl_{2}$ was the optimal concentration for the production of $NO_{2}$, respectively.
XML 기반의 Shopping Agent System 설계 및 구현
서인규(In-Kyou Seo),최병석(Byung-Soek Choi),한성국(Sung-Kook Han) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.1B
웹의 표준은 XML을 기반으로 개발, 발전 되고 있는 추세이며, 이러한 XML 기술은 전자상거래, 문서 변환, ERP등의 응용 분야에 활발하게 적용되고 있다. 이와 더불어 XML 문서화에 따른 데이터 처리 기법도 중요하게 되었다. 데이터 처리 기법에 에이전트 기술을 이용함으로써 불필요한 HTML 문서 내용을 처리하는 기존의 방법보다 구조화된 데이터를 검색하여 결과의 정확성과 신속성을 가질 수 있다. 본 논문에서는 이러한 논리적인 XML 문서를 기반으로 한 쇼핑몰을 구축하고 그에 대한 데이터를 수집, 처리하는 에이전트를 설계, 구현하였다.