• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.111-113
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• 2015

Floats are used by the parties involved in a construction project. The owner may use float by changing order(s) or by executing risk avoidance plan; the contractor may use it for leveling resources or substituting activities' construction methods to reduce costs. Floats are accepted either just as by-product obtained by critical path method(CPM) scheduling or as asset having significant value. Succinctly, existing studies involved in float value does not consider its' changes on project time domain. It is important to identify float ownership and to quantify its' corresponding values. This paper presents a method that quantifies float value of money that changes over project execution. The method which accurately computes the monetary value of float may contributes to resolve conflicts relative to float ownership and/or delay issues among project participants. It compares the difference between the monetary value of total float - on non-critical path in each and every schedule update. It makes use of critical path method (CPM) and commercial software with which practitioners are already familiar.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제38권
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• pp.26.1-26.6
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• 2016

Background: Xenologous or synthetic graft materials are commonly used as an alternative for autografts for guided bone regeneration. The purpose of this study was to evaluate effectiveness of carbonate apatite on the critical-size bone defect of rat's calvarium. Methods: Thirty-six critical-size defects were created on 18 adult male Sprague-Dawley rat calvaria under general anesthesia. Calvarial bones were grinded with 8 mm in daimeter bilaterally and then filled with (1) no grafts (control, n = 10 defects), (2) bovine bone mineral (Bio-$Oss^{(R)}$, Geistlich Pharma Ag. Swiss, n = 11 defects), and (3) hydroxyapatite ($Bongros^{(R)}$, Bio@ Inc., Seongnam, Korea, n = 15 defects). At 4 and 8 weeks after surgery, the rats were sacrificed and all samples were processed for histological and histomorphometric analysis. Results: At 4 weeks after surgery, group 3 ($42.90{\pm}9.33%$) showed a significant difference (p < 0.05) compared to the control ($30.50{\pm}6.05%$) and group 2 ($28.53{\pm}8.62%$). At 8 weeks after surgery, group 1 ($50.21{\pm}6.23%$), group 2 ($54.12{\pm}10.54%$), and group 3 ($50.92{\pm}6.05%$) showed no significant difference in the new bone formation. Conclusions: $Bongros^{(R)}$-HA was thought to be the available material for regenerating the new bone formation.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2008년도 정기 학술대회
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• pp.567-572
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• 2008

This paper's purpose is to improve determining of the critical response of curved bridge to multi-component seismic motion. There are several methods to combine responses by multi-component excitation response, 30%, 40% rules and square-root-of-sum (SRSS). These combination rules determine same value of critical response in straight bridges. However, each method has critical response value of different magnitude in curved bridges. Thus a study about critical response of curved bridges is required. This paper presents comparison critical responses value as each combination rule, 30%, 40% rules and SRSS on curved bridges with the different radiuses of curvature. This study was carried out by response spectrum analysis of OO IC steel box girder bridge using SAP2000. It is concluded as follows: 1) In curved bridges, 30% and 40% rules tend to underestimate the critical response relatively to SRSS. 2) When bridges have smaller radiuses than 100m, difference between SRSS and 30% or 40% rules let run errors up as radiuses of curvature decreased.

• Perspectives in Nursing Science
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• 제8권2호
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• pp.105-112
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• 2011

Purpose: The purpose of this study was to identify the predictors of job stress in hospital nurses. The predictors of job stress were the subject's general characteristics, communication style, critical thinking disposition and job satisfaction. Methods: 294 nurses who had worked in a hospital participated in this study. The data were analysed with descriptive analysis methods including a t-test, ANOVA, Scheffe test, Pearson correlation coefficient and multiple regression analysis. Results: The job stress score for nurses was 111.6. There was a statistically significant difference between job stress and marriage status (p<.001), education (p<.001), clinical career (p<.001), position (p<.001), communication style (p<.001), critical thinking disposition (p<.001), and job satisfaction (p<.001). Critical thinking disposition, job satisfaction and clinical career together accounted for 36.88% of the total variation in job stress. Conclusion: Based on the findings of this study, the development of a nursing intervention program that can lead to an improvement in critical thinking disposition is suggested.

• 한국가정과교육학회지
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• 제22권3호
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• pp.19-36
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• 2010

본 연구의 목적은 중학교 1학년 가정교과서에 제시된 활동과제의 비판적 사고 수준을 알아보는 데 있다. 이러한 목적을 달성하기 위하여 "기술 가정"교과서 3종을 표집하고, 이 3종의 교과서 전개 부분에 수록된 활동과제를 선별하여, 이를 유행에 따라 분류하였다. 최종적으로 추출된 93개의 활동과제 분석을 위해 김영정(2005)의 '비판적 사고 9요소 9기준'을 바탕으로 비판적 사고를 위한 9개의 문형을 개발하여 분석의 준거로 사용하였다. 2007년 개정 교육과정에 기초하여 출판된 중학교 1학년 가정교과서 중 임의로 표집된 3종의 교과서에 수록된 활동과제 분석결과는 다음과 같다. 첫째, 가정교과서 활동과제의 비판적 사고 수준은 총점이 66.8점으로 나타나 학생들에게 비판적 사고를 유도하기에는 미흡한 것으로 나타났다. 비판적 사고의 하위 범주별로는 논증적 사고(83.9점), 분석적 사고(78.1점), 변증적 사고(38.3점) 순으로 나타나, 특히 변증적 사고를 유도하는 데 매우 미흡한 것으로 파악되었다. 둘째, 활동과제의 비판적 사고 수준이 단원별로 사고 수준이 단원별로 차이가 있었다. '청소년의 자기관리(77.8점)', '청소년의 소비생활(75.2점)', '청소년의 성과 친구관계(71.1점)' 단원의 활동과제는 다른 단원에 비해서 비판적 사고를 잘 유도하고 있는 반면, '옷차림과 자기표현(61.4점)', '청소년의 발달(60.0점)', 그리고 '청소년의 영영과 식사(59.6점)' 단원의 활동과제는 비판적 사고를 유도하는 데 미흡한 것으로 파악되었다. 셋째, 비판적 사고 수준이 탐구활동(75.7점), 토의 토론(74.6점), 실천활동(65.4점), 해보기(50.7점) 순으로 나타나 활동과제 유형에 따라 비판적 사고 수준에 차이가 있었다. 활동과제 유형 중에 탐구활동 유형이 학습자에게 비판적 사고를 유도하는 데는 가장 효과적인 반면, 해보기 유형은 비판적 사고를 유도하는 데 미흡한 것으로 파악되었다.

• 한국생산제조학회지
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• 제8권2호
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• pp.80-85
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• 1999

The purpose of this work is to investigate fatigue damage of quasi-isotropic laminates under tensile loading in different directions. Low cycle fatigue tests of [0/-60/+60]a laminates and [+30/-30/90]s lamina tes were carried out. Material systems used are AS4/Epoxy and AS4/PEEK. The fatigue damage of [+30/-30/90]s is very different from that of [0/-60/+60]s. The position of delamination generated at AS4/Epoxy and AS$/PEEK laminates were differentiated by the matrix difference that is, we suppose, the value of both GIcr(critical energy release rate of mode-I) and GIIIcr(critical energy release rate of mode-III) difference.

• 한국컴퓨터정보학회논문지
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• 제13권5호
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• pp.19-26
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• 2008

본 논문에서는 실시간 얼굴검출을 위하여 감시카메라에서 입력된 RGB영상을 YCbCr 영상으로 변환한 후 연속된 두 영상의 차를 구하고 Glassfire 라벨링을 실시했다. 라벨링 결과 가장 넓은 구역의 면적과 Area 임계치 값을 비교하여 임계값 이상의 면적이면 동작변환으로 인식하고 영상을 추출하였다. 이렇게 추출된 동작변환 영상을 대상으로 얼굴 검출을 실시하였다. 얼굴 검출에 필요한 특징을 추출하기 위해 AdaBoost알고리즘을 사용하였다.

• Structural Engineering and Mechanics
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• 제17권6호
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• pp.735-749
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• 2004

This work presents a direct integration scheme, based on a fourth order finite difference approach, for elastodynamics. The proposed scheme was chosen as an alternative for attenuating the errors due to the use of the central difference method, mainly when the time-step length approaches the critical time-step. In addition to eliminating the spurious numerical oscillations, the fourth order finite difference scheme keeps the advantages of the central difference method: reduced computer storage and no requirement of factorisation of the effective stiffness matrix in the step-by-step solution. A study concerning the stability of the fourth order finite difference scheme is presented. The Finite Element Method and the Boundary Element Method are employed to solve elastodynamic problems. In order to verify the accuracy of the proposed scheme, two examples are presented and discussed at the end of this work.

• 복식문화연구
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• 제29권2호
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• pp.153-166
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• 2021

In this study, the artistic background and formative nature of representative 19th century realist artists Gustave Courbet and Honoré Daumier were analyzed and applied in a fashion context. By displaying representational desires (necessary adhesions of man and society) in their work, they became characteristic matrixes of critical realism and to perceive critical realism. The purpose of the study was to apply the characteristics of critical realism to the contemporary fashion collections of Alexander McQueen. Research was conducted to analyze the characteristics that appear in the field of fashion and to review methods of expression and internal aesthetics displayed through various aspects of fashion design. Characteristics of critical realism were analyzed by researching the formativeness and periodical background of the paintings of Courbet and Daumier. Based on these characteristics, analysis was conducted to identify critical realism in the fashion collections of Alexander McQueen. Data and scope included fashion information sites, internet photo data, and video material. Critical realist characteristics were categorized into five types as follows: 'The proper borrowing of extremely realistic subjects signifies', 'satirical reconstruction and narrative composition', 'antipathetic distortions and abject representations', 'critical reproductions based on technology', and 'the maximization of ambivalent sexuality'. It was concluded that the characteristics of critical realism (recognized by the common formation of Courbet and Daumier) also appeared in Alexander McQueen's fashion collection but were inherited in a form that transcended pictorial expression due to the overall difference in use of visual arts.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2001년도 추계학술대회 논문집
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• pp.180-183
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• 2001

Direct marketing in the form of Internet Commerce and TV Home Shopping became the focus of concern for Korean companies. Despite the importance of research in these interactive systems, few studies have been performed on the consumer behavior in TV Home Shopping. This study explores what factors consumers perceive critical in these interactive systems, and analyzes the difference in consumer perception with respect to these critical factors.