• Journal of the Economic Geographical Society of Korea
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• v.12 no.4
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• pp.364-387
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• 2009

Female marriage immigrants have increased since the mid-1990s in Korea. Thus, their adaptation to Korean society has been a big social issue in Korea. There are a lot of academic researches on their adaptation to Korean society so far. We cannot sufficiently understand general main factors of their adaptation to Korean society because of methodological problems in the studies on the female marriage immigrants. Particularly, there are very few studies on female marriage immigrants' adaptation to their communities. This study analyzes determinants of female marriage immigrants' adaptation to their communities, using stepwise multi-regression. Data are collected from questionary survey on female marriage immigrants in Seoul, Gyeong-gi, Daegu, Gyeong-buk, Gwangju, Jeon-nam. Dependent variables are community life, spatial cognition and activities, and neighborhood relationship. Each dependent variable is analyzed with 30 independent variables through stepwise multi-regression. As a result, 16 positive determinants and 2 negative ones are selected. Positive determinants are resident identity, age, adaptation to home, number of Korean friends and same nationals' friends in Korea and so on. But, Korean language fluence is not selected as a significant factor. This is different from a general recognition. As exiting researches, the importance of social network and adaptation variables is also identified in this study.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.15 no.2
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• pp.329-339
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• 2002

This research presents a systematic design procedure for supplemental viscoelastic dampers required to satisfy the given performance objectives using capacity spectrum method. To obtain required damper size, the amount of supplemental damping was computed from effective damping minus equivalent damping and inherent damping of structure. In the case of viscoelastic damper, iterative procedure is required because of the inherent stiffness of the damper. To verify the design method proposed in this study, parametric studies were performed for single degree of freedom systems with design variables. The method was also applied to a 10-story steel framed structure and the earthquake responses were obtained. According to time history analysis result the controlled displacements turned out to be close to the target displacement regardless of the design parameters.

• KDI Journal of Economic Policy
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• v.10 no.2
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• pp.3-26
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• 1988

본(本) 연구(硏究)의 목적(目的)은 우리나라의 1963~86년도 자료를 사용하여 소비(消費) 및 가계저축함수(家計貯蓄函數)를 추정함으로써 가계(家計), 기업(企業), 정부저축(政府貯蓄) 등 세 부문의 저축(貯蓄) 사이에 어떠한 관계, 즉 어느 정도의 대체관계(代替關係)가 있는가를 판별하고 정부저축(政府貯蓄)과 정부재정지출(政府財政支出) 등의 변수(變數)로 표시되는 재정정책(財政政策)의 구축효과(驅逐效果)와 이에 따른 재정정책(財政政策)의 유효성(有效性) 혹은 무력성(無力性) 문제(問題)를 분석하고자 함에 있다. 본(本) 연구(硏究)의 분석결과에 의하면 기업저축(企業貯蓄)과 정부저축(政府貯蓄)은 가계저축(家計貯蓄)과 대체관계(代替關係)가 아닌 보완관계(補完關係)를 갖는 것으로 나타난다. 이는 일국전체(一國全體)의 자본형성(資本形成)에 있어서 기업(企業) 및 정부저축(政府貯蓄)이 매우 중요한 정책변수(政策變數)임을 시사하는 것으로 가계저축율(家計貯蓄率), 나아가 국내저축율(國內貯蓄率)의 제고(提高) 및 유지(維持)를 위해 기업저축증대(企業貯蓄增大)를 위한 제반유인정책(諸般誘因政策)을 꾸준히 강화하고 정부저축증대(政府貯蓄增大)를 위한 효율적이고 건전한 재정운용(財政運用)이 지속되어야 할 것이다. 한편 정부재정지출(政府財政支出)은 적자(赤字)에 의하는 조세(租稅)에 의하든 민간소비(民間消費)를 큰 폭으로 증가시키는 것으로 나타나 가계(家計)의 초합리성가설(初合理性假說)이나 완전(完全)한 선견가설(先見假說)이 상정하는 바와 같이 재정정책(財政政策)의 완전(完全)한 구축효과(驅逐效果)가 나타남에 따른 재정정책(財政政策)의 무력성(無力性) 결과(結果)와 대조적으로 우리나라의 재정정책(財政政策)이 그동안 경제안정(經濟安定)을 위한 강력한 정책수단(政策手段)으로서의 역할을 수행해 왔음을 보여주고 있다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.15 no.4
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• pp.649-659
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• 2002

For a variety of elastic-plastic stress fields of plane strain specimens, many research works verified the validity of J-T approach. To generalize the validity of J-T method, however, further investigations are needed for more practical 3D structures than the idealized geometries as plane strain specimens. In this work, selecting two main types of structures such as plate and straight pipe, we perform 3D finite element(FE) modeling, and accompanying elastic, elastic-plastic FE analyses. We then study the validity of J-T application to 3D structures, and present some useful informations for the design or assessment of pipe welds by comparing the stress fields from the detailed 3D FE analyses to those predicted with J-T two parameters.

• Korean Journal of Agricultural and Forest Meteorology
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• v.19 no.2
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• pp.43-53
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• 2017

This study aims to analyze the effect of typhoons on pear production. Pears are typical fruits that are vulnerable to typhoon damages, so typhoons are negatively associated with pear productivity. However, relatively less pear damages by typhoons in the main pear production area, comparing to the average in Korea, have been reported. The main production area seems to adopt better agricultural techniques or practices to cope with natural disasters such as typhoons. Thus, this study tests the hypothesis that there are differences of production losses due to typhoons between the main pear production area and the rest using the stochastic frontier analysis. The main production area is defined by Location Quotient Index (LQI), and we found that LQI had a significant effect to decrease the productivity losses in the main production areas, which shows that those production areas alleviated the pear production loss due to typhoons.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.5
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• pp.741-748
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• 2014

This study was conducted to monitor the quality characteristics of Artemisis capillaris ethanolic extract by response surface methodology. The independent variables were extraction temperature ($X_1$; 60, 70, 80, 90, and $100^{\circ}C$), extraction time ($X_2$; 1, 2, 3, 4, and 5 hr), and ethanol concentration ($X_3$; 0, 20, 40, 60, and 80%). Soluble solid content ($Y_1$), chlorogenic acid content ($Y_2$), and coumaric acid content ($Y_3$), etc. were analyzed as the dependent variables. Estimated optimal conditions for soluble solids were an extraction temperature of $87.65^{\circ}C$, extraction time of 3.19 hr, and ethanol concentration of 42.40%. The optimal extraction conditions for chlorogenic acid were $84.30^{\circ}C$, 3.14 hr, and 47.85%, respectively. Further, those for coumaric acid were $83.45^{\circ}C$, 3.40 hr, and 45.39%, respectively. Extraction conditions for effective components of Artemisis capillaris were superimposed by response surface plots on optimization extraction condition of each dependent variable, including soluble solid, chlorogenic acid, and coumaric acid contents. As a result, superimposed extraction conditions were $80{\sim}90^{\circ}C$, 3~4 hr, and 40~50%, respectively. Under these conditions, soluble solid, chlorogenic acid, and coumaric acid contents were 1.09%, 25.66 mg%, and 20.25 mg%, respectively.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.126-128
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• 2009

한국정부의 중소기업 정책을 분석하고 기업의 성과 분석을 통해 지원 정책의 유효성을 연구하였다. 중소기업의 지원 정책 과제를 창의와 혁신주도의 역동적인 중소기업군 육성, 기술경영혁신 활동 및 협력활동 강화, 자금 인력 판로 등 성장기반 구축 등 3가지로 분류한 후 기업의 성과(사업성과, 기술성과, 정책만족)와 비교하여 정책의 영향도를 측정하였다. 연구 결과 정부가 추진하는 중소기업 정책에 대한 기업의 성과의 특징은 자금 지원 분야였다. 전체 24개 측정 변수에서 연구 결과 중 가장 유의미한 변수로 선정된 5개 변수는 1)벤처,이노비즈,경영혁신형기업 육성, 2)지식기반서비스 육성자금 지원, 3)기술 연구개발 지원, 4)경영안정자금 지원, 5)공공부문의 중소기업 판로 지원이었다.

• The Journal of the Acoustical Society of Korea
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• v.19 no.7
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• pp.48-52
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• 2000

음성 인식에 많이 사용되는 HMM (hidden Markov model)을 개선하기 위하여 분절 특징을 사용한 분절 특징 HMM은 성능이 우수하다고 발표되었다. 그러나, 분절 길이가 증가하고 회귀 차수가 놓아질수록 분절 특징 HMM을 표현하는 매개 변수의 수도 같이 증가된다. 따라서, 본 연구에서는 상태에서 관측 가능한 분절의 분산을 분절 내의 모든 프레임에 대하여 공통적으로 표현하는 고정 분산 방법을 통하여 성능의 저하 없이 매개 변수의 수를 줄이도록 시도하였다. 실험 결과, 두 혼합 밀도인 경우 고정 분산을 이용한 분절 특징 HMM의 성능과 시변 분산을 이용한 성능의 차이가 거의 없어, 제안된 방법의 유효성을 입증하였다.

• Journal of the Korea Concrete Institute
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• v.19 no.2
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• pp.145-151
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• 2007

The shear failure modes of FRP strengthened concrete beams are quite different to those of the beams strengthened with steel stirrups. When the beams are externally wrapped with FRP composites, many beams fail in shear due to concrete crushing before the FRP reaches its rupture strain. In order to predict the shear strength of such beams, the effective strain of the FRP must be blown. This paper presents the results of an experimental study on the performance of reinforced concrete beams externally wrapped with FRP composites and infernally reinforced with steel stirrups. The main parameters of the tests were FRP reinforcement ratio, the type of fiber material (carbon or glass) and configuration (continues sheets or strips). The experimentally observed effective strain of the FRP was compared with the strain calculated using a proposed method.

• Journal of Korea Water Resources Association
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• v.31 no.6
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• pp.657-665
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• 1998

New diagnosing method o flood possibility was proposed. The method can be processed by following steps: first, decide if current available water resources are above normal or not; second, compute a consecutive period above normal; third, precipitation is accumulate through the period; fourth, daily depletion (runoff and evapotranspiration) amount is subtracted from the accumulated precipitation and remains are translated to one day's precipitation, which is called effective precipitation; and finally, effective precipitation index. the larger effective precipitation index means the higher flood possibility. This method has been applied to the flood event occurred in the central region of Korea at late July 1996 and compared with the study by Korea Water resources Association (1996). The new method is proven to be much faster in computation, and therefore much better in practical use for emergency situation than current rainfall-runoff models. It is because the new method simplifies some steps of currently used method such as parameter estimation and water level observation. It is also known that new method is more scientific than any other methods that use accumulated precipitation only as it considers the runoff depletion in time