• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.4A
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• pp.337-346
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• 2009

To determine the initial configuration of the suspension bridge appropriate idealization model and analysis procedure are proposed as considering the boundary and loading conditions of stiffening girder during the erection. The construction stages of a suspension bridge are divided into two steps which are the first stage of the erection and the second stage of the completion in terms of the erection time of stiffening girders, and depending upon such an erection step the initial configuration analysis is classified the first configuration analysis and the revision analysis of the second configuration. The boundary and loading conditions and the analysis procedures for each stage are suggested and the results are verified by comparing with existing data. The results show that the proposed method provides better solution compared to the results using existing method.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.267-270
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• 2016

차량 인식 기술은 지능형 자율주행 차량 및 첨단 운전자 보조 시스템 (ADAS: Advanced Driver Assistance System)의 개발에 있어서 핵심 요소 기술이다. 영상 기반의 차량 검출 알고리즘은 일반적으로 가설 생성 (HG: Hypothesis Generation) 단계와 가설 검증 (HV: Hypothesis Verification) 단계로 구성된다. 가설 검증 단계는 관심 영역 (ROI: Region of Interest) 내에 차량이 존재할 가능성이 있는 후보 영역을 만드는 단계로서 전체 알고리즘의 복잡도와 성능에 영향을 미친다. 본 논문에서는 관심 영역 내에 존재하는 그림자와 차량으로 인한 에지를 검출하고 두 특징 정보를 결합한 가설 생성 방법을 제안하고 차량 후방 영상을 이용하여 사각지대를 감시하는 시스템에 제안 방법을 적용하는 실험을 수행하였다. 실험 결과로 제안 방법이 차량 후보 영역의 존재 여부와 위치 정보를 판단하기에 적합하며 이를 통해 차량 검출 알고리즘의 계산 복잡도를 개선하면서도 다음 단계인 가설 검증 시 검출 성능을 향상시킬 수 있음을 확인하였다.

• 한국벤처창업학회:학술대회논문집
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• 2017.04a
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• pp.43-43
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• 2017

본 연구는 창업보육센터 입주기업을 대상으로 지원서비스가 성장단계별로 차이가 있을 것이라는 가정과 입주기업이 느끼는 만족도와 그에 따른 경영성과에 영향을 미칠 것이라는 가정 하에 입주기업의 니즈(needs)를 반영한 성장단계별 차별화된 효과적 지원서비스로 입주기업의 만족도와 경영성과를 높임으로써 창업성공률을 제고하기 위한 이론적 기여와 정책적 시사점을 제시하는 데 목적이 있다. 본 연구의 검증을 위하여 가설1 성장단계별 지원서비스는 정(+)의 유의한 차이가 있을 것이다, 가설2 성장단계별 만족도는 정(+)의 유의한 차이가 있을 것이다, 가설3 성장단계별 경영성과는 정(+)의 유의한 차이가 있을 것이다를 ANOVA 분석을 실시하였고, 가설4 지원서비스가 경영성과에 정(+)의 영향을 미칠 것이다, 가설5 지원서비스가 만족도에 정(+)의 영향을 미칠 것이다, 가설6 만족도가 경영성과에 정(+)의 영향을 미칠 것이다는 회귀분석을 실시하였다. 분석결과, 선행연구와 같이 지원서비스는 입주기업의 경영성과와 만족도에 영향을 미치는 것으로 나타났다. 본 연구는 창업보육센터의 성장단계별 지원서비스가 서비스의 만족도와 경영성과에 어떠한 영향을 미치고 있는지를 중소기업청 지정 창업보육센터 입주기업 174개를 표본으로 SPSS 22.0을 이용하여 검증하였다. 본 연구에서 실증분석을 통하여 얻은 연구 결과를 요약하면 다음과 같다. 첫째 성장단계별 지원서비스의 차이에 대한 차이분석 결과 정(+)의 유의한 차이가 있는 것으로 나타났다. 둘째, 성장단계별 만족도의 차이는 차이가 없는 것으로 나타났으며 성장단계별 경영성과의 차이 중 투자유치는 정(+)의 유의한 차이가 있는 것으로 나타났다. 셋째, 창업보육센터에서 제공하는 지원서비스가 입주기업의 경영성과와 만족도에 정(+)의 영향을 미치는 것으로 나타났다. 마지막으로 입주기업의 만족도도 경영성과에 정(+)의 영향을 미치는 것으로 나타났다. 결과를 종합해보면 창업보육센터의 지원서비스가 아직도 행정지원과 자금지원 등에만 국한되어 지원되고 있는 것으로 나타나 입주기업의 성장단계에 적합한 다양한 서비스의 제공이 필요함을 주지시켜 주고 있다. 또한, 성장단계별 입주기업의 만족도는 매출증가와 고용증가로 이어졌지만 아직 투자유치에는 크게 영향을 미치지 못하고 있음을 알 수 있다. 따라서 모든 입주기업에게 획일적인 지원서비스가 아닌 차별화된 지원서비스가 필요하며, 이를 위하여 창업보육센터 매니저들이 엑셀러레이터로서의 역할을 하기 위한 창업보육역량 고도화가 필요하고, 창업보육사업은 기업의 성장단계와 관련이 있으므로 입주기업의 성장단계 및 창업보육센터의 지원하는 역할과 기능에 따른 창업보육모델의 진화를 고려한 3세대, 4세대 보육모델로서의 발전된 운영정책 수립이 요구된다.

• Annual Conference on Human and Language Technology
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• 1989.10a
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• pp.296-301
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• 1989

본 논문의 목적은 매개변항(parameter)과 부분집합원리(subset principle)를 재귀대명사 구조분석 및 습득에 적용하여 보편문법(Universal Grammar)과 언어습득의 상호관계를 검토하는 데에 있다. 본 논문은 첫째, 재귀대명사 '자기'를 매개변항이론에 근거하여 분석하고, 둘째, 재귀사의 구조를 부분집합원리에 적용하여 '자기'의 습득과정을 관찰한다. 본 논문의 목적을 위해 두 가지 가설을 세워 실험적으로 검증하였다. 실험결과, 선행사자격 습득단계의 가설이 확증되었으며, 지배변항 습득단계의 가설은 결정적 증거가 미비해 앞으로의 과제로 남아 있다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.367-370
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• 2002

The Elements of common temporary work in Construction Project have ambiguous work scope between client and builder. Also problems of non-breakdown, non-standardization in common temporary work are obstructive when contract. Finally they will be reached claim factors on the construction project. Because the common temporary work information management system is not built, We have to develop common temporary work information management system based on historical cost database for Construction Management. This system will successively accomplish the project in pre-construction step to standardize work items and to forecast the cost of common temporary work. Therefore feasibility study will be possible with historical database in new project.

• Korean Journal of Construction Engineering and Management
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• v.6 no.6 s.28
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• pp.115-123
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• 2005

Design of steel $bridge^{\circ}AEs$ temporary works has conducted relying on the experiences of engineers based on the previous similar projects. Consequently, there have been arguments against over-design of temporary bents to be required at the actual construction sites, and unnecessary design changes have been issued at the construction stage. In this study, we have developed an optimum design support system for temporary works of the steel bridge construction through establishing the database for the materials to be needed for implementation of temporary works. We've also improved the accuracy and efficiency of the works through the design optimization for temporary works, and contributed to reduce design changes as well as to utilize the design informations at the construction stage.

• Journal of the Korean Chemical Society
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• v.56 no.3
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• pp.371-377
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• 2012

In this study, open inquiry reports of 165 eighth graders in Daegu were analyzed in terms of content area, the types of inquiry hypothesis, and the types of inquiry variables. Before summer vacation, students learned about inquiry process and explored their own inquiry topic for two class hours. During summer vacation, students performed open inquiry including problem selection, designing and performing experiment, data collection, data analysis, and writing report. After the vacation, students submitted their reports, and answered to additional survey regarding the source of inquiry idea, the definition of hypothesis, and the most difficult step of inquiry process. As a result, chemistry was the most dominant content area of the reports and biology and life science were the next. 130 out of 165 reports included inquiry hypotheses, and most of them were predictive hypotheses. In many reports, dependent and independent variables could not be identified because of their ambiguity. However, inquiry variables described in experimental design, which were mostly categorical variables, were clearer than those described in inquiry subject and inquiry hypothesis. The most difficult step of inquiry process for students was to generate an idea for open inquiry.

• Journal of Distribution Research
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• v.9 no.1
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• pp.25-45
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• 2004

As electronic commerce establishes itself as a viable and competitive channel, this research compares the attractiveness of online and offline purchase from a transaction cost perspective. In the process, we propose a framework that integrates transaction cost with purchase decision process and product type. Specifically, the paper proposes and tests hypotheses regarding the difference between online and offline channels with respect to the transaction costs incurred in each stage of the purchase decision process. These differences are further compared across different product types categorized according to the FCB Grid. A total of 24 hypotheses were tested by conducting a questionnaire survey on university students. The results showed that 19 out of 24 hypotheses were supported. Following a detailed presentation of the analysis results, the paper concludes by discussing the academic and managerial implications of the findings.

• Journal of Korean Society of Steel Construction
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• v.18 no.1
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• pp.33-45
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• 2006

Cable-stayed bridges are more inherently vulnerable to wind during the erection stages than when they are already being used. Even if a bridge that is already being used is aerodynamically stable, it is prone to having aerodynamic instabilities within the design wind speed during construction. Therefore, when the bridge's designers deliberate on the method they will use in constructing the bridge, they must likewise come up with a suitable plan to ensure the stability of the bridge during its erection (e.g., conducting a wind-tunnel investigation). This paper describes the aeroelastic full-bridge model tests that were conducted to investigate the aerodynamic behavior of the bridge during erection, with emphasis on aerodynamic stability and the mitigation of the buffeting response through temporary stabilization. The aerodynamic performance of a cable -stayed bridge with a main span of 50 m was studied in its completed stage and in two erection stages, corresponding 50% and 90% completion, respectively. In the 50% erection stage tests, a balanced cantilever configuration, with wind cable and temporary support at the tower, was conducted. The system that was determined to be most effective in reducing wind action on the bridge during construction was proposed in the paper, based on the results of the comparative study that was conducted.

• Journal of The Korean Association For Science Education
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• v.32 no.1
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• pp.129-145
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• 2012

This study investigated factors of creativity and interaction between factors that are revealed when gifted students designed scientific experiments. For this, we firstly developed items which required the written process of designing experiments to explore creativity factors. Then, we used these items as a part for letters of self-introduction to students who applied for 2011 correspondence education of general physics for the Korea Physics Olympiad. 513th letters of self-introduction which were analyzed to investigate factors of creativity in view of creativity definition after researchers' consultation, which specifically means a combination of divergent and convergent thinking. The results were as follows; (1) in the step of hypothesis building, we could not only find Originality and the Flexibility & Fluency, which were factors of divergent thinking, but also Coherency and Elaborateness, which were factors of convergent thinking. (2) in the step of the hypothesis testing, we could explore Originality, Flexibility & Fluency in divergent thinking and Coherency, Reliability, Clarity, Elaborateness in convergent thinking. (3) we also figured out three creativity types of gifted students from the viewpoint that creativity is a consequence of interaction between divergent thinking and convergent thinking; a) Type A showed divergent and convergent factors of creativity in the step of hypothesis building. However, type A did not include divergent factors of creativity on the process of the hypothesis testing. b) Type B had divergent and convergent factors of creativity on the process of the hypothesis testing, but it had not convergent factors of creativity on the step of hypothesis building. c) Finally, in Type C, only divergent factors of creativity appeared on the process of the hypothesis testing, but convergent factors of creativity could be found on the step of hypothesis building and hypothesis testing.