• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1994년도 춘계학술대회논문집
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• pp.115-123
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• 1994

A man model can be used as an effective tool to design ergomonically sound products and workplaces, and subsequently evaluate them properly. For a man model to be truly useful, it must be integrated with a posture prediction model which should be capable of representing the human arm reach posture in the context of equipments and workspaces. Since the human movement possesses redundant degrees of freedom, accurate representation or prediction of human movemtn was known to be a difficult problem. To solve this redundancy problem, the psychophysical cost function can predict the arm reach posture accurately. But the joint discomfort that human feels at the joint can not be predicted since the effects of external factors on the joint discomfort is not known. In this study a psychophysical experi- ment using the magnitude estimation technique was performed to evaluate the effects of external factors such as joint, joint angle and Perceived Exertion Ratio on the joint discomfort. Results showed that the joint discomfort increased as the Perceived Exertion Ratio increased, but the relation is not linear and was affected not only by the joint but also by the joint angle for the same Perceived Exertion Ratio. The interaction effect of the joint and the joint angle was also significant. From the results it is needed to develope the cost function which can predict the joint discomfort considering the joint, joint angle and external load.

• Structural Engineering and Mechanics
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• 제83권3호
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• pp.363-375
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• 2022

Flexural capacity prediction is a challenging problem for externally prestressed concrete beams (EPCBs) due to the unbonded phenomenon between the concrete beam and external tendons. Many prediction equations have been provided in previous research but typically ignored the differences in deformation mode between internal and external unbonded tendons. The availability of these equations for EPCBs is controversial due to the inconsistent deformation modes and ignored second-order effects. In this study, the deformation characteristics and collapse mechanism of EPCB are carefully considered, and the ultimate deflected shape curves are derived based on the simplified curvature distribution. With the compatible relation between external tendons and the concrete beam, the equations of tendon elongation and eccentricity loss at ultimate states are derived, and the geometric interpretation is clearly presented. Combined with the sectional equilibrium equations, a rational and simplified flexural capacity prediction method for EPCBs is proposed. The key parameter, plastic hinge length, is emphatically discussed and determined by the sensitivity analysis of 324 FE analysis results. With 94 collected laboratory-tested results, the effectiveness of the proposed method is confirmed, and comparisons with the previous formulas are made. The results show the better prediction accuracy of the proposed method for both stress increments and flexural capacity of EPCBs and the main reasons are discussed.

• 동아시아경상학회지
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• 제12권1호
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• pp.1-11
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• 2024

Purpose: This study empirically examines the relations among corporate performance, technology, and corporate capabilities for service companies to find factors that could affect the competitiveness of the service industry. Most study on technology in the service industry have been conducted in developed countries, and yet there exist not sufficient empirical reviews. Research design, data and methodology: This paper, using rare empirical data, examines Korea's service industry and aims to make an academic and managerial contribution to the understanding of the relation between corporate competence and performance. This study analyzes 567 Korean Domestic Companies in Non-manufacturing and Service Industry, using the 2020 Detailed Survey of Venture Businesses (2500) data. Frequency analysis, correlation analysis, and regression analysis are performed. Results: Results show, Hypothesis 1 that internal competence has positive influence on technological strength, is supported. However, Hypothesis 2 that technological strength mediates between internal competence and business performance, Hypothesis 3 that external competence has positive influence on technological strength and Hypothesis 4 that technological strength mediates between external competence and business performance are all partially supported/rejected. Conclusions: This study suggests that technological strength is an important factor that affects both market share and sales. And mediating effect of technology strength emphasized in market share. However, in managing sales, more cautious approach and a more detailed analysis are needed..

• 한국콘텐츠학회논문지
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• 제20권10호
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• pp.750-759
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• 2020

본 연구는 연결재무제표 외부감사실시내용 추가공시정보와 감사인의 감사시간, 감사보수 간 관계를 분석한다. 2014년부터 2016년까지 연결재무제표를 공시한 상장기업을 대상으로 한 분석 결과는 다음과 같다. 첫째, 연결재무제표 외부감사실시내용 추가공시정보에 대한 감사인의 감사시간은 유의한 양(+)의 관련성을 나타냈다. 이는 연결감사내용의 추가공시가 유용한 정보제공 유인에 기반한 것으로 해석할 수 있다. 둘째, 추가공시정보와 감사보수는 유의한 관련성을 보이지 않았다. 이는 감사보수에 책정하는 감사위험의 측면에서, 연결감사실시내용에 대한 추가공시가 감사인의 연결감사위험에 대한 인식에 기반한 행태가 아님을 시사한다. 본 연구는 선행연구에서 고려되지 않았던 감사보고서와 연결감사보고서의 외부감사실시내용 정보가 구별되어 공시되고 있음을 제시하여 학계에 유용한 정보를 제공한다. 또한, 이에 대한 공시가 감사인의 유용한 정보제공유인에 기반함을 실증함으로써 정책적 시사점을 제시한다.

• 통상정보연구
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• 제12권2호
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• pp.3-27
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• 2010

This paper covers a plan to build supply chain cooperation systems among stream of the textile industry to strengthen international competitiveness. To obtain the study objective, it has been reviewed the theoretical rationale relating to organizational cooperation model and discussion and performed the case study that analyzed stream group and participated firms to the textile stream policy project. The analyzed stream cooperative types that measured configuration of cooperative degree and productive type are new market creation, technology improvement, relation maintenance, and relation cease. Two types - new market creation and technology improvement - have significant effect of the textile stream cooperation. Key successful factors of these two effective types are the external intervention of specialized consulting organization and build internal coordination and integrated mechanism to the cooperative stream group and participated firms.

• 한국조리학회지
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• 제6권3호
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• pp.373-389
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• 2000

This study is about job change hotel kitchen cook. addition, through case analysis, by choosing three hotels in Seoul, the relation job changes was found out, and through the interviews with cooking employees for more than three months, their opinions and reliabilities were collected and analyzed. The surveyed questionnaires were analyzed and studied through SPSS WIN Package, reliability analysis, factor analysis, frequency analysis, correlation, and distribution analysis and T-test were conducted to figure out the population statistical difference. According to the study results. those employees who thought kitchen environment, internal and external working conditions. the welfare for the employees are the most important factors in case of changing jobs scored over average 4 in the statistical analysis. For this reason, in order to reduce the rate of job changes the hotels efforts for and interests in appropriate compensation, improvement of working environment. continuous educational training, fair human resource management, and maintenance of good relation with co-workers are necessary.

• 소음진동
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• 제6권6호
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• pp.735-747
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• 1996

In this paper, buckling reliability analyses of stiffened cylinder with random initial geometric imperfection under axial impact load are performed by the combined response surface method. The effect of random geometric imperfection on the failure probability and reliability is recognized quantitatively. Buckling reliability decreases with the increase of mean value, cov of initial geometric imperfection under the same external load. Buckling probability under impact load is greater than those under static load with the same condition. From the probabilistic characteristics of imapct buckling load, relation between reliability index and safety parameter can be obtained in addition to the relation between load and reliability index. And those results can be used to determine the range of required safety parameter and acceptable imperfaction.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1991년도 봄 학술발표회 논문집
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• pp.84-90
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• 1991

Underground structures usually consist of rock masses or concretes which can be cracked or have cracks. This study aims to develop an analysis program which can deal with the effect of discontinuous behavior due to those cracks using the block theory. It is assumed that rock masses form blocks along the discontinuity lines, and deformation within the block is relatively small. The behavior of discontinuity plane of the structures is divided into sliding along the discontinuity plane. separation of discontinuity by tensile force, and degradation of asperity angle of discontinuity plane by external force with sliding of rock Basses. These behaviors are implemented using constitutive relation and relevent load-displacement relation defined through normal and shear stiffnesses. Time varying displacements and block velocities are calculated by explicit time stepping algorithm. The effect of rock supports including rockbolts is also considered, and the tending effects which occurs in relatively thin lining is also considered.

• 한국컴퓨터정보학회논문지
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• 제22권12호
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• pp.35-48
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• 2017

Extracting temporal information from documents is becoming more important, because it can be used to various applications such as Question-Answering (QA) systems, Recommendation systems, or Information Retrieval (IR) systems. Most previous studies only focus on English documents, and they are not applicable to the other languages due to the inherent characteristics of languages. In this paper, we propose a new system, named ExoTime, designed to extract temporal information from Korean documents. The ExoTime adopts an external Knowledge Base (KB) in order to achieve better prediction performance, and it also applies a bagging method to the temporal relation prediction. We show that the effectiveness of the proposed approaches by empirical results using Korean TimeBank. The ExoTime system works as a part of ExoBrain that is an artificial intelligent QA system.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2013년도 춘계학술대회
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• pp.273-274
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• 2013

최근 해상 풍력 발전이 개발됨에 따라 풍력발전타워는 더욱 거대해지고 있으며, 육상의 타워에 비해 파력과 흐름 등 다양한 외력에 노출되어있다. 이에 따라 해상 타워의 기초는 육상 타워 보다 더욱 안정성이 요구된다. 본 연구에서는 현재 관측된 최대 풍속인 60m/s가 해상풍력타워로 향하여 불 때, p-y 관계를 이용해, 원통형, 계단형, 원추형 타워의 기초에 작용하는 풍력과 파력을 해석 하였다.