• Earthquakes and Structures
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• 제22권3호
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• pp.263-275
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• 2022

Structural collapses can occur as a result of a dynamic amplification of either, the building's seismic response or the ground shaking by local site effects; one of the reasons is a resonance effect due to the proximity of the structural elastic fundamental period TE and the soil fundamental period TS. We evaluate the vulnerability to resonance effects in Guadalajara, México, in a three-step schema: 1) we define structural systems in the building environment of western Guadalajara, in terms of their construction materials and structural components; 2) we estimate TE with different equations, to obtain a representative value in elastic conditions for each structural system; and, 3) we evaluate the resonance vulnerability by the analysis of the ratio between TE and TS. We observe that the larger the soil fundamental period, the higher the resonance vulnerability for buildings with height between 17 and 39 m. For the sites with a low TS, the most vulnerable buildings will be those with a height between 2 and 9 m. These results can be a helpful tool for disaster prevention, by avoiding the construction of buildings with certain heights and structural characteristics that would result in a dangerous proximity between TE and TS.

• 자원환경지질
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• 제43권3호
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• pp.259-267
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• 2010

국내에서 노멀전기검층은 지반조사, 지하수 환경조사, 지열조사, 지질조사, 광물자원 평가 등의 다양한 분야에서 널리 이용되고 있다. 노멀전기검층은 지표 전기비저항탐사법과는 달리 완전공간에 대한 자료를 취득하기 때문에 지표부근에 수위가 위치하는 시추공에서 자료를 취득하는 경우, 수위 및 지표에 대한 영향을 고려해야 한다. 이 연구는 노멀전기검층 존데, 전류리턴전극, 기준점전위전극, 시추공내 지하수위 등을 포함하는 실제 물리검층 환경과 동일한 조건에서 노멀전기검층을 시물레이션하여 지표 및 지하수 수위가 노멀전기검층에 미치는 영향을 분석하였다. 수치 모델링은 2차원 목표지향 자기적응 고차 hp 유한요소법(2D goal-oriented high-order self-adaptive hp finite element method)을 이용하였다(여기서 h는 요소의 크기, p는 노드에서의 근사 차수). 이 알고리듬을 이용하여 측정한 겉보기비저항의 오차가 1%보다 작도록 계산할 수 있는 최적 hp 격자를 구성함으로써 매우 정밀한 결과를 얻었다. 수치실험결과, 지표부근에서 취득한 노멀전기검층 자료는 기준점전위전극이 시추공에 가까울수록 자료의 왜곡이 증가하며 장노멀전기검층에서의 왜곡이 단노멀전기검층에서 보다 심함을 알 수 있었다.

• 대한전자공학회논문지SP
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• 제47권4호
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• pp.49-55
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• 2010

조명 환경에 의해 발생하는 강한 그림자 영역은 반사 영상을 이용하는 얼굴인식시스템의 성능을 저하시키는 주요인으로써, 인식률을 향상시키기 위해서는 강한 그림자 영역과 얼굴의 특징 영역을 구분해 낼 필요가 있다. 한편 Bilateral 필터는 영상 화소 값의 비선형적인 조합을 사용하여 경계영역을 보존하면서도, 전체 영상을 평활화할 수 있는 특성을 갖는다. 따라서 Bilateral 필터의 특성은 레티넥스 기반 조명 정규화 방법에서의 조명을 추정하는 과정에 사용되는 평활화 필터에 적합하다. 이에 본 논문에서는 강한 그림자 영역을 효과적으로 제거하기 위한 Bilateral 필터 기반의 새로운 조명 정규화 방법을 제안한다. Bilateral 필터의 계수는 화소 간 근접성(proximity)과 불연속성(discontinuity)의 곱으로 설계하여, 추정된 조명 영상에서 강한 그림자 영역이 비교적 정확하게 보존되도록 한다. 제안된 방법의 성능은 PCA(Principle Component Analysis)를 이용하여 인식률을 측정하고, 두 가지 데이터베이스에 대해 기존의 조명 정규화 방법들과 비교하여 평가하였다.

• 한국생활과학회지
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• 제12권5호
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• pp.713-735
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• 2003

The purpose of this study was to investigate the effects of the characteristics of maternal social networks on maternal expectation for their own children to examine the path that social networks had an effect on the self-esteem and the emotional intelligence of children through maternal expectation for their own children. The data used in this study were collected from 524 fourth to sixth graders and their mothers residing in Daejeon using structured questionnaire. The major findings of the study were as follows : (1) Among social network characteristics, proportion of friends and neighbors, proximity, direction and interference had a negative effect, and proportion of mothers of child's friends, frequency of contact, intimacy, emotional support, service support had a positive effect on maternal expectation for their own children. (2) Among social network characteristics, proportion of mothers of child's friends had a direct effect and proportion of friends, neighbors, and mothers of child's friends, proximity, frequency of contact, intimacy, direction, emotional support, service support, and interference had an indirect effect on children's emotional intelligence through maternal expectation for their own children. (3) Among social network characteristics, proportion of kin and mothers of child's friends, intimacy, service support, material support and interference had a direct effect, and proportion of neighbors and mothers of child's friends, proximity, frequency of contact, direction, service support had an indirect effect on children's emotional intelligence through maternal expectation for their own children.

• 한국생활과학회지
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• 제18권2호
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• pp.523-534
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• 2009

The purposes of this study were to identify brand equity factors influencing on brand preference and to investigate the effects of preference, price acceptability, distribution proximity, and appropriateness on brand performance of domestic and imported cosmetics brands. A total of 300 women aged between 20 and 49 years were surveyed on two domestic brands and two imported brands that were well-known to consumers during the month of September, 2006, in Seoul, Daejeon, Gyeonggi-do, and Chungcheong-do. The data were analyzed with factorial analysis, multiple regression analysis, ANOVA, Cronbach's ${\alpha}$, etc., using the SPSS 12.0. The result of the study included: 1) Four factors of brand equity were identified: brand image, social reputation, quality, and brand awareness. 2) Brand image, quality, appropriateness, and brand performance of the domestic brands were higher than those of the imported brands. But brand awareness of the imported brands was higher than that of the domestic brands. 3) Brand preference of the domestic brands was affected by social reputation, quality, brand image, and brand awareness in order of significance. And brand performance of the domestic brands was affected by brand preference, appropriateness, price acceptability and distribution proximity in order of significance. 4) Brand preference of the imported brands was affected by brand image, social reputation, brand awareness, and quality in order of significance. And brand performance of the imported brands was affected by appropriateness, price acceptability, brand preference, and distribution proximity in order of significance.

• 인간식물환경학회지
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• 제22권6호
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• pp.677-690
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• 2019

Recently, the importance and effectiveness of neighborhood forests have been increasing in relation to the quality of life of urban residents. However, there are very few domestic studies that analyzed the correlation between visit characteristics and life satisfaction. Therefore, the study aims to understand how people use the forest for recreation and determine how visit characteristics in neighborhood forests affect individual life satisfaction(ILS). A nationwide survey (N=2,624) was conducted on visit frequency, proximity to forest, means of transportation, forest activities, and life satisfaction. To measure ILS, we used the three factors (personal, relative, collective) of COMOSWB (Concise Measure of Subjective Well-being) developed by Seo et al.(2011). The analysis shows that people usually visit the forest located within the distance of 10-30 minutes from their homes 1-2 times a month on foot for hiking/walking (forest bathing). In particular, the older visitors(over 60s) tend to visit the forest more often than the younger ones (20s). Furthermore, more frequent visitors are more likely to live near the forest. As a result of analyzing the correlation between visit characteristics and ILS by controlling demographic variables, it was found that 'visit frequency' had a positive effect on ILS, and 'proximity to the forest' did not have a statistically significant effect on ILS. In other words, residents who live near the forests are more likely to be satisfied with their lives by visiting frequently. The significance of the study is that it statistically determined that visit frequency is a key factor for ILS. Future studies should take into account the various qualitative factors of forest visit such as vegetation, quantity and types of forest, which will contribute to setting the direction for urban forest development and management.

• 한국융합학회논문지
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• 제10권7호
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• pp.303-309
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• 2019

본 연구의 목적은 체육수업 상황에서 교사-학생 상호작용과 결과기대 및 학업열의의 구조적 관계를 규명하는 것이다. 이 연구의 목적 달성을 위해 수도권에 소재하고 있는 중학교 4곳의 학생들을 대상으로 편의표본추출법을 이용하여 총 442부를 최종 유효 표본으로 선정하였다. 자료처리는 SPSS 20.0과 AMOS 20.0을 이용하여 전체연구 단위의 적합도 검증을 확인한 후 가설검정을 실시하였으며, 그에 따른 결과는 다음과 같았다. 첫째, 교사-학생 상호작용의 근접성은 결과기대와 학업열의에 정적인 영향을 미치는 것으로 나타났으나, 반면 영향력은 결과기대와 학업열의에 유의한 영향을 미치지 않는 것으로 나타났다. 둘째, 체육수업에 대한 학생들의 결과기대는 학업열의에 정적으로 영향을 미치는 것으로 나타났다. 셋째, 교사-학생 상호작용의 근접성과 학업열의의 관계에서 결과기대는 매개역할을 하는 것으로 확인되었다.

• 국제지역연구
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• 제22권4호
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• pp.99-121
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• 2018

본 연구의 목적은 국제합작투자 상황에서 국제합작기업을 통한 태국 현지파트너의 해외파트너로부터의 지식습득에 영향을 미치는 요소들에 대해 살펴보는 데 있다. 이를 위해 본 연구는 먼저 현지파트너의 자체 특성인 흡수역량, 국제합작기업과의 관계 특성인 균등지분율 근접정도, 해외파트너와의 관계 특성인 신뢰 등으로 구분하고, 이들이 현지파트너의 지식습득에 미치는 영향을 분석하였다. 또한 지식암묵성이 이러한 특성과 지식습득과의 관계를 조절하는지를 분석하였다. 본 연구에서 태국 소재 현지파트너 기업을 대상으로 설문을 통해 수집된 자료를 분석한 결과, 현지파트너의 자체 특성인 흡수역량과 해외파트너와의 관계 특성인 신뢰는 지식습득에 긍정적 영향을 미치고, 국제합작회사와의 관계 특성인 현지파트너의 지분율은 균등지분율에 근접할수록 지식습득에 긍정적 영향을 미치는 것으로 나타났다. 게다가 지식암묵성은 흡수역량 및 신뢰와 지식습득의 관계를 강화하는 반면, 지식암묵성은 균등지분율 근접정도와 지식습득의 관계를 강화하지 못하는 것으로 나타났다. 이러한 결과를 바탕으로 본 연구의 결론 및 시사점을 제시하였다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 1996년도 학술발표대회논문집
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• pp.21-28
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• 1996

The Purpose of this study was to identify the effects of the elderly Koreans of residential relocation and to find their conditioning variables that mediate some of the negative effects of residential relocation. The research was performed by questionnares. Subject samples consisted of 448 elderly individuals who have lived for two years or less in one of the two new residential communities in commuting proximity with Seoul: Ilsan or Bundang. Two variables measured for the life of the elderly to residential relocation were the change of the social relationship network and the change of the depression level. Results indicated that the relocation had a substantial disrupting effect on the social network of the elderly. The level of depression of the subjects after relocation was decresed. It was also found that the effects of the elderly to residential relocation was mainly affected by physical factors of environment and residential satisfaction.

• 한국운동역학회지
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• 제17권3호
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• pp.217-224
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• 2007

This study was to investigate the effects of enslaving on finger-tip force of other fingers on finger pressing speed. We hypothesized that the effects depend on finger pressing speed, and the fingers proximity and are larger for fingers that are closer to each other. Six healthy, right-handed subjects(age: $27.1{\pm}4.3yr$, height: $175.4{\pm}7.2cm$, weight $71.3{\pm}5.8kg$) participated in the experiment. Each finger showed no significant on task finger speed. In the tasks with two neighboring fingers (e.g. middle and ring finger tasks), the index and middle fingers showed larger forces than the other neighboring fingers. During the index and little finger tasks, the enslaving force magnitude decreased with distance to the task finger (i.e. index finger enslaving force was the smallest during the little finger task).