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분산 시각 미디어 검색을 위한 웹 서비스 기반 매치메이커 구현
이성우(Seongwoo Lee),안철범(Chulbum Ahn),서보원(Bowon Suh),나연묵(Yunmook Nah) 한국멀티미디어학회 2008 멀티미디어학회논문지 Vol.11 No.2
웹 서비스 사이트들의 급속한 증가에 따라 수많은 유사 웹 서비스를 중에서 최적의 서비스를 찾는 방법이 문제가 되고 있다. 매치메이커는 주어진 질의에 적합한 서비스 사이트를 찾아주는 일종의 에이전트 시스템이다. 본 논문에서는 분산 시각 미디어 검색 프레임워크인 HERMES를 위한 매치메이커를 제안하고, QoS를 기반으로 결과 서비스 사이트의 순위를 부여하는 방법을 설명한다. 또한 실험을 통해 제안 방법의 유용성과 정확성을 보인다. With the rapid increase of Web Service sites, one emerging problem is how to find the most appropriate Services from the massive number of similar Web Services. A matchmaker is an agent system, which find the best Service providers for the given queries. In this paper, we propose a matchmaker for the distributed visual media retrieval framework, called HERMES, and describe how to rank the resulting Services based on the QoS elements related with visual media Services. To show the usefulness and correctness of the proposed schemes, some experimental results are also shown.
지역특성이 인구이동에 미치는 영향 : 계속이동과 회귀이동
이성우(SeongWoo Lee) 한국지역개발학회 2001 韓國地域開發學會誌 Vol.13 No.3
Most migration analyses implicitly treat migration as if it were a once-and-for-all event Most moves, however, are repeat moves, either on to new locations or back to places where migrants lived before. Such repeat events are generally coined as onward or return migration, where the former is a sequence of moves to new locations and the latter represents a move to a previous location The purpose of this article is to extend the empirical literature on population migration by examining the effects of regional differentials on population movement between return and onward migrants. Our findings show some significant differences between return and onward migrants with respect to individual and locational characteristics. Compared with return migrants, onward migrants comprise a higher proportion of those searching for better opportunities in their response to the attractions of potential destinations. Those who overestimated the utility of the potential destination are more likely to be return migrants, taking advantage of kinship ties and location-specific amenities. We suspect that the expected difference in returns may result from a trade-off between the lower costs associated with making a return migration, the possibility of lower income levels following migration, and the help of kinship and location-specific capital in the home regions, relying upon relatives and friends for monetary or social assistance during the transition period right after migration.
이성우(Lee SeongWoo),임형백(Lim HyungBaek) 한국지역개발학회 2003 韓國地域開發學會誌 Vol.15 No.2
The purpose of this study is to investigate whether place of birth matters for households' residential well-being in Korea. The present 3tudy utilizes Korea census data(2% sample) to ev려uate households’s residential well-being denoted by household overcrowding. We cIassified more than 1.5 PPR(persons per room) as a threshold that defines whether or not people live in overcrowded housing. We adopt binary logit modeI with decomposition method to provide evidences of the housing density disparities by place of birth in Seoul metropolitan area. In comparison of the observed values, we found that households from Cholla provinces represent a disproportionately high Jevel of househoJd overcrowding compared with peopJe originated from other provinces. However, in the statistical analysis, the present study found that having controIled for the factors σaditionally thought to influence housing density, as well as other housing market characteristics in Seoul, we couldn’t find any cIear effect of the prejudice explained by residu려 effects against people from Cholla. Rather the effect is the highest for people from Kangwon, of which the finding is contrary to those of the previous studies. We concIude that pJace of biπh has partial effect on living in a suitable Iiving environment, which is denoted by housing density in this study. The present study concIuded with some policy issues to alleviate the soci머 disparities and suggested some future studies.
중소기업 지원용 공공기금의 효율적 관리를 위한 제도개선 방안
이성우(SeongWoo Lee) 한국부패학회 2011 한국부패학회보 Vol.16 No.4
Credit Guarantee Fund and Technology Credit Guarantee Fund (“Public Funds” hereinafter) are founded by the CREDIT GUARANTEE FUND ACT and TECHNOLOGY CREDIT GUARANTEE FUND ACT each to support the financing of Small and Medium Enterprises("SMEs" hereinafter) which have deficient collateral. These Public Funds only focus on the guarantee support services to help the companies without any other special following-up control except for exercising the right to indemnity after subrogation fulfilled by them. Public funds are not the private sectors for profit, but public organizations made in accordance with the ideals of public welfare for the development of SMEs. Therefore, for maintaining the financial soundness, Public Funds should take the charge of management of the SMEs Public Funds subrogated (which have become enterprises insolvent) because the government's contribution is the largest portion of Public Funds. As mentioned above, after subrogation, Public Funds should maintain the soundness by improving the value of the SMEs Public Funds subrogated (which have become enterprises insolvent) or collecting the debt quickly from the corporate bankruptcy foundation of that above mentioned SMEs as the manager for company rehabilitation or the trustee in bankruptcy on DEBTOR REHABILITATION AND BANKRUPTCY ACT.
수산화철-분말활성탄 혼합 흡착제의 유입 혼합가스 조건에 따른 황화수소와 실록산 제거 특성
이성우 ( Seongwoo Lee ),김대근 ( Daekeun Kim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회지 Vol.36 No.2
The purpose of this study was to investigate the effect of gas composition with an iron hydroxide-activated carbon powder composite for the removal of hydrogen sulfide and siloxane (D4) in a fixed bed reactor. As a result of the breakthrough test that controlled the space velocity, initial concentration, relative humidity, oxygen, and gas mixture of methane/carbon dioxide, the adsorption capacity of hydrogen sulfide for the iron hydroxide-activated carbon powder composite was improved up to five times by 60% of the relative humidity. In addition, the space velocity and initial concentration were found to be important factors. The adsorption capacity of siloxane increased by 0.168 g siloxane/g adsorbent with increasing space velocity. In the case of simultaneous removal of hydrogen sulfide and siloxane, the adsorption capacity of hydrogen sulfide was negligible compared with that of siloxane, and the adsorption capacity of the siloxane was decreased by the hydrogen sulfide.
미국에 거주하는 한국인과 아시아인들의 영어사용능력 결정요인에 관한 연구
이성우(SeongWoo Lee),민성희(SungHee Min),김성수(SungSoo Kim) 한국인구학회 2001 한국인구학 Vol.24 No.2
해외로 이주한 이민자들의 언어능력 계발은 이민국 내에서 경제적으로 적응하는 데 있어 중요한데, 이는 현지사회에서의 언어 소통능력이 이민국의 노동시장에 얼마나 적합한지 나타내는 이민자의 기술 수준 중에서 중요한 부분을 차지하기 때문이다. 게다가 언어는 이민자가 사회에 적응하고, 다양한 인종과 민족 집단으로 구성된 미국과 같은 사회에서 사회적, 정치적 응집력을 나타내는 데 매우 중요한 역할을 담당한다. 이 연구의 주 목적은 미국 내의 한국인과 다른 아시아 이주자들의 영어능력에 대한 결정요인을 분석하는 것이다. 본 연구의 분석을 위해서 질적, 양적인 측면에서 가장 대표성을 담보하고 있는 미국의 센서스 자료(PUMS, A, 5%)를 이용하였다. 서열화된 범주를 가지고 있는 영어사용능력의 질적 격차를 분석하기 위해서 본 연구에서 사용된 통계기법은 Ordered Probit이다. 분석 결과는 미국에 오래 거주한 경우, 가족 중에 자녀가 있는 경우, 모국어가 보다 적게 사용되는 지역에 거주하는 경우, 이주를 할 때의 연령이 보다 낮은 경우, 학력이 보다 높은 경우에 영어를 보다 유창하게 사용한다는 사실을 알 수 있었다. 하지만, 아시아 이민자들의 영어사용능력의 수준은 출신국별 이민역사와 모국어의 차이별로 두드러진 차이가 존재하였다. The development of language skills among immigrants is important for their economic adjustment in their host societies since language is an important dimension of the skill levels of immigrants relevant for the labor markets of the host countries. Moreover, language plays a key role in the social adjustment of immigrants and in the social and political cohesion particularly in the society like the US that has diverse racial and ethnic groups. The main purposes of the present study are to analyze the determinants of English abilities of Korean and other Asian immigrants in the US. The present study utilizes the Public Use Microdata Sample (PUMS, A, 5%) in the US. We adopted the ordered probit technique to analyze qualitative differences of English ability. The study found that English fluency increases with a longer duration in the US, the presence of children in the household, living in an area in which a smaller proportion speak ones mother tongue, a younger age at immigration, a higher level of schooling. However, there are marked variations in levels of English proficiency among Asian immigrants.