• Korean Chemical Engineering Research
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• 제60권3호
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• pp.392-397
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• 2022

Methane is one of the major greenhouse gases, recently, the biotechnological conversion from methane to high-value added chemicals have emerged as an effort to reduce methane gas emission. In this study, we optimized ectoine bio-milking conditions in which cells were repeatedly used to improve intracellular and extracellular ectoine yield from methane by using Methylomicrobium alcaliphilum 20ZDP2. First, the cultivation and intracellular ectoine accumulation conditions were optimized with respect to the growth phase and medium salinity to achieve the highest yield of synthesis. Second, ectoine excretion was optimized by determining the ectoine secretion time (15 min) in appropriate medium salinity under hypoosmotic conditions (1% NaCl). Finally, bio-milking of ectoine was successfully repeated more than 10 times using M. alcaliphilum 20ZDP2, and the ectoine yield was improved up to 129.29 mg/ DCW g.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.674-676
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• 1996

In this paper, we suggested the verification method of protective algorithms using EMTDC(Electro-Magnetic Transient DC). In other to verify protective algorithms using EMTDC, we first had to make a user defined component and then applied it to a simple power system with parallel line. By means of this method, We reduced the much time and effort to develop or improve the protective algorithm of digital protective relay. For the future, we apply this method to IDPACS(Integrated Digital Protection and Control System) and intend to implement more reliable digital protective relays.

• 가족자원경영과 정책
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• 제14권4호
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• pp.299-321
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• 2010

The purpose of this study was to investigate how marriage migration females understand and adjust to the culture of family life in Korea. The study was the conducted by extensively interviewing one member from each of a total of 16 women's multicultural families at a daycare center area in Seoul between June 16, 2010 and July 28, 2010. The results can be summarized as follows: All interviewees were marriage migration females, in the range 20 to 50 years of age, and with middle educational backgrounds. They all had middle-level incomes. Through the content analysis of the informants' responses, three major factors were found to influence the understanding and adjustment of to the culture of family living: personal factors, familial support, and sociocultural support systems. Among the personal factors, the intimacy of the married couples was trouble major factor. An issue that tended to arise was that Korean husbands' traditional culture in terms of their way of thinking was often different from that of the wife's culture. However, husbands supported their wives' outside activities and friendships in order to help them adjust to the culture of family living. The husbands made an effort to understand their wives' original culture and national food, often visiting restaurants that served their wives' national cuisine. In terms of familial support, the most important factors affecting marriage migration females were orienting the education of children to the mother's native language, cooking their national foods, and visiting the mother's nation with the children. Marriage migration females had the following requires: The teacher in the daycare center needed to be interested in children from multicultural families and encourage self-pride in the marriage migration females' children. In terms of sociocultural support systems, marriage migration females are conscious of the indisposition and lack of consideration in Korean life. However, the Korean government and local provinces are concentrating attention on education for marriage migration females in terms of language, because learning the language can help these women to become accustomed to the rituals of Korean life. Marriage migration females make an effort to understand and adjust to Korean family living culture that involves the food culture for ceremonial occasions, folk plays, and places of historic interest. A matter of importance is Korean people's effort to understand and adjust to multicultural family with their distinctive cultures. Welfare policy related to multicultural families involves adopting supportive laws and actions.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.82-87
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• 2002

RFM is the sensor model of IKONOS imagery for end-users. IKONOS imagery vendors provide RPC (Rational Polynomial Coefficients), Ration Function Model coefficients for IKONOS, for end-users with imagery. So it is possible that end-users obtain geospatial information in their IKONOS imagery without additional any effort. But there are requirements still fur rigorous 3D positions on RPC user. Provided RPC can not satisfy user and company to generate precision 3D terrain model. In IKONOS imagery, physical sensor modeling is difficult because IKONOS vendors do not provide satellite ephemeris data and abstract sensor modeling requires many GCP well distributed in the whole image as well as other satellite imagery. Therefore RPC modification is better choice. If a few GCP are available, RPC can be modified by method which is introduced in this paper. Study on evaluation modified RPC in IKONOS reports reasonable result. Pseudo GCP generated with vendor's RPC and additional GCP make it possible through sequential solution.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2003년도 창립학술대회
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• pp.599-611
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• 2003

Recently, information technology are rapidly diffused throughout the world. A new paradigm, 'telework' and 'distant education' is a product of the tremendous technological changes driving the disabled vocational rehabilitation. In the computer and information communication technology areas related with web-based telework?distant education, the disabled expect vocational rehabilitation. Therefore nowadays, the disabled effort to adapt to the new information era by web-based telework and distant education. This study attempts to suggest developmental framework of web-based telework?distant education center to vitalize the disabled vocational rehabilitation.

• BMB Reports
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• 제45권1호
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• pp.47-50
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• 2012

The International HapMap Project and the Human Genome Diversity Project (HGDP) provide plentiful resources on human genome information to the public. However, this kind of information is limited because of the small sample size in both databases. A Genome-Wide Association Study has been conducted with 8,842 Korean subjects as a part of the Korea Association Resource (KARE) project. In an effort to build a publicly available browsing system for genome data resulted from large scale KARE GWAS, we developed the KARE browser. This browser provides users with a large amount of single nucleotide polymorphisms (SNPs) information comprising 1.5 million SNPs from population-based cohorts of 8,842 samples. KAREBrowser was based on the generic genome browser (GBrowse), a web-based application tool developed for users to navigate and visualize the genomic features and annotations in an interactive manner. All SNP information and related functions are available at the web site http://ksnp.cdc. go.kr/karebrowser/.

• 대한조선학회논문집
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• 제47권4호
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• pp.477-486
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• 2010

During sailing by wind-driven thrust on the sail, a catamaran sailing yacht generates leeway and heeling. For predicting sail force, a model test was carried out according to running attitude. Through the model test, drag and side force of the real ship was predicted. A purpose of this study is to find sail force to C.E from changed attitude during running direction. By balance of hull and sail, a heeling force of designed sail is predicted. Also through heeling force and driving force, total sail force and direction from C.E are considered with changed mast including leeway and heeling.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.141-141
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• 2006

Petrochemicals contain a wide variety of monomers and their derivatives which are used in the production of plastics, fibers and synthetic rubber. Until now, petrochemicals have had a dramatic impact on our food, clothing, shelter and leisure because they are the least expensive, most readily available, and can be processed most easily into the end use products. Petrochemical industry, which is known as one of the typical cycle profitability businesses, is now moving downward. In order to overcome the anticipated loss of profit, petrochemical companies are making an effort to offer a value-added upgrading to conventional products. This lecture will discuss a few of issues on the current status and prospect of petrochemical industry.

• 대한예방의학회:학술대회논문집
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• 대한예방의학회 1994년도 교수 연수회(환경)
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• pp.402-403
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• 1994

There are three different approaches to chemical risk assessment which will be considered in this paper. The U.S. Environmental Protection Agency(EPA) Cancer Risk Assessment includes some of the approaches used by the International Agency for Research on Cancer (IARC). The Agency for Toxic Substances and Disease Registry (ATSDR) effort is an evaluated database approach similar to that used in the National Institute for Occupational Safety and Health (NIOSH) Criteria Documents and in the documentations prepared by the Occupational Safety and Health Administration (OSHA) for the Permissible Exposure Limits (PELs) and those of the American Conference of Governmental Industrial Hygienists (ACGIH) for the Threshold Limit Values (TLVs). A third approach is used by the Committee on Toxicology.

• 대한화학회지
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• 제51권1호
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• pp.56-64
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• 2007

이 연구에서는 변칙사례 및 대안가설에 의해 유발된 인지갈등과 불안, 주의집중, 노력이 개념변화에 미치는 영향을 조사하였다. 중학교 1학년 학생 470명을 대상으로 선개념 검사를 실시하여 203명의 오개념을 지닌 학생들을 선발하였다. 변칙사례를 제시한 후, 대안가설 제시 전후에 각각 변칙사례에 대한 반응 검사와 불안검사를 실시하였다. CAI 프로그램으로 밀도 개념학습을 실시하였으며, 사후 검사로 주의집중 검사, 노력 검사, 개념 검사를 실시하였다. 연구 결과, 변칙사례에 의해 유발된 인지갈등(사전 인지갈등)은 대안가설 제시 후 증가하였다. 사전 인지갈등은 변칙사례와 대안가설에 의해 유발된 인지갈등(사후 인지갈등)에만 직접적인 영향을 주었으며, 사후 인지갈등은 개념변화에 직접적으로 긍정적인 영향을 주었다. 변칙사례에 의해 유발된 불안(사전 불안)은 대안가설 제시 후 감소하였다. 사전 불안은 변칙사례와 대안가설에 의해 유발된 불안(사후 불안)에만 직접적인 영향을 주었으며, 사후 불안은 노력을 통해 개념변화에 부정적인 영향을 주었다. 주의집중은 개념변화에 직접적으로 또는 노력을 경유하여 긍정적인 영향을 주었다. 이런 결과는 개념변화 수업에서 변칙사례와 대안가설을 함께 제시하는 전략이 변칙사례만 제시하는 전략보다 인지갈등을 더욱 유발하거나 불안을 감소시켜 학생들이 개념학습 과정에 보다 능동적이고 적극적으로 참여하도록 유도함으로써 개념변화를 촉진할 가능성을 시사한다.