• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.571-575
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• 2007

With intensive competition due to the limited growth of the domestic construction market volume and the opening and construction boom of international construction market, construction firms register to grope strategy of enterprise dimension for improvement such as entry extension of domestic construction market order corporate strategy and international construction market. In this research, influence factors of corporate strategy are extracted and their interrelationships are presented in the domain of change of external environment with the internal and external market system, construction enterprise's internal capacity and corporate strategy, government and the internal and external market. The result of this research will be used for quantitative analysis through system dynamics simulation and basic data of model effectiveness verification through actuality domestic construction enterprise's case study, and can be used to basic data of new corporate strategy establishment because construction enterprise forecasts effect hereafter establishing corporate strategy in construction environment that change rapidly.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.325-334
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• 2009

The object of this study is to examine the relations between leisure activity and duty stress and separation intention in private guards. The subject of this study is set up the private guards who are working at private guard company in a capital sphere. This study applyed the way of judgement abstraction and abstracted the total of 360 persons. However, the number used in the final analysis is 333 persons. The last conclusion in this study is as follows. Firstly, the relation between duty stress and separation intention has a matual effect meaningfully. Secondly, the physical stress hasn't an effect on the term of leisure activity, and separation intention. affects meaningfully the physical stress. Thirdly, the relation beween leisure activity and separation intention exerts a meaningful influence mutually in all sphere. Duty stress is a important parameter between leisure activity and separation intention.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.113-116
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• 2014

기술수용모델은 지난 20년 동안 많은 주제로 다루어지고 있으며 지금도 여전히 계속 연구되어 오고 있다. 메타분석은 여러 실증연구의 정량적인 결과를 통합과 분석을 통해 전체 결과를 조망할 기회를 제공하는 통계적 통합 방법이다. 최근 스마트폰 관련 연구가 활발하게 이루어지고 있다. 이러한 시점에 기술수용모델을 기반으로 선행 요인에 관한 문헌적 고찰과 메타분석을 실시하였다. 본 연구는 2013년 이전 국내 학술지에 게재된 연구 중 기술수용모델의 인과관계를 설정한 총 106편의 연구논문을 대상으로 하였다. 메타분석의 결과, 선행 요인과 인지된 유용성의 경로에 가장 큰 효과 크기는 유희성으로 나타났다. 인지된 유용성과 유희성의 경로에 효과 크기는 0.536이었다. 그리고 선행 요인과 인지된 사용 용이성의 경로에 가장 큰 효과 크기는 자기 효능감으로 나타났다. 인지된 사용 용이성과 자기 효능감 경로에 효과 크기는 0.626이었다. 분석결과를 통해 이론적 실무적 시사점을 논의 하고자 한다.

• Journal of the Korea Society for Simulation
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• v.23 no.3
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• pp.19-25
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• 2014

Demand forecasting is the basis of management activities including marketing strategy. Especially, the demand of a part is remarkably important in supply chain management (SCM). In the fields of various industries, the part demand usually has the intermittent characteristic. The intermittent characteristic implies a phenomenon that there frequently occurs zero demands. In the intermittent demands, non-zero demands have large variance and their appearances also have stochastic nature. Accordingly, in the intermittent demand forecasting, it is inappropriate to apply the traditional time series models and/or cause-effect methods such as linear regression; they cannot describe the behaviors of intermittent demand. Markov bootstrap method was developed to forecast the intermittent demand. It assumes that first-order autocorrelation and independence of lead time demands. To release the assumption of independent lead time demands, this paper proposes a modified bootstrap method. The method produces the pseudo data having the characteristics of historical data approximately. A numerical example for real data will be provided as a case study.

• Journal of The Korean Association For Science Education
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• v.36 no.5
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• pp.757-768
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• 2016

This study developed an SSI (Socio-Scientific Issue) discussion program that applies a creative technique called six thinking hats, and then investigated the differences in argumentation patterns and effects on the decision-making abilities of each character feature of students between SNS debate and existing face to face debate. There were three SSI themes - Designer Babies, embryonic stem cell study, and legitimacy of abortion. Students were divided into two groups, the debate group using SNS and face to face debate group. The character patterns of students were divided to 'extraversion,' 'agreeableness,' and 'conscientiousness' through test sheets for character features for each student. Both groups were educated for creative discussion methods using six thinking hats and then, the class progressed. As a result of analyzing argumentation patterns used in SNS debate and face to face debate, the most used argumentation pattern was the "cause pattern." But comparing to face to face debate, other patterns (mark, inference, authority, motive) were also used in SNS debate. The study analyzed three factors of decision-making ability for each character feature of students such as complexity, perspectives, and inquiry. As a result, for 'complexity' factor, there was a significant difference between SNS debate group and face to face debate group only in the student group of Agreeableness. For 'perspectives' factor, there were significant differences between SNS debate group and face to face debate group in all three characters. Finally, for inquiry, there were no significant differences between SNS debate group and face to face debate group in all three characters. Accordingly it would be necessary to apply SNS debate using the six thinking hats in SSI education to enhance perspectives.

• Journal of the Korean School Mathematics Society
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• v.17 no.1
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• pp.73-92
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• 2014

This study was performed in part with the task to find measures to improve the defining characteristics of feelings, value, interest, self-efficacy, and others aspects in regards to learning math among elementary and middle school students. For this study, it was essential to understand the appropriate questions that are needed to be asked during a consultation at a math clinic, for students that are having a hard time learning math. As a method for performing this study, the content of scheduled counseling over 2 years from a math clinic were collected and the questions that were given and taken were analyzed in order to figure out the types of questions needed in order to effectively examine students that are facing difficulty with learning math. The analysis was performed using Grounded theory analysis by Strauss & Corbin(1998) and went through the process of open coding, axial coding, and selective coding. For the paradigm in the categorical analysis stage, 'attitude towards learning math' was set as the casual condition, 'feelings towards learning math' was set as the contextual condition, 'confidence in one's ability to learn math' was set as the phenomenon, 'individual tendencies when learning math' was set as the intervening condition, 'self-management of learning math' was set as the action/interaction strategy, and 'method of learning' was set as the consequence. Through this, the questions that appeared during counseling were linked into categories and subcategories. Through this process, 81 concepts were deducted, which were grouped into 31 categories. I believe that this data can be used as grounded theory for standardization of consultation in clinics.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.1338-1342
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• 2006

수자원의 계획과 관리를 위해 정확한 유량 측정은 무엇보다 중요하다. 이를 위해 다양한 유량 측정방법이 개발, 적용되고 있다. 본 연구는 국내 하천에 적용 가능한 다양한 유량 측정방법을 시험하천에 동시에 적용하여 유량 측정 방법간 비교를 목적으로 수행되었다. 비교를 위해 적용된 방법은 유속면적법, 부자법, ADCP법 등의 비연속적 방법과 기존 보를 이용한 방법, 초음파 유량계를 이용한 방법, 유속지수법, 실시간 경사면적법 등의 연속적 방법이다. 평저수기에 주로 적용될 수 있는 비연속적 방법인 유속면적법과 ADCP법의 비교에서는 유속면적법이 방류량 대비 평균 ${\pm}4.7%$의 오차를 가지며, ADCP법의 경우 ${\pm}4.6%$의 오차를 갖는 것으로 나타났다. 비연속적 방법과 연속적 방법을 동시에 비교하기 위해 평저수 5회, 홍수 2회를 포함하는 총 7회의 동시 유량측정이 수행되었다. 유속면적법과 ADCP법은 부적절하게 적용된 경우를 제외하면 오차는 대체로 10% 이내로 나타났다. 부자법의 경우 홍수시에만 적용되었으나 오차가 방류량 대비 20% 이상으로 다소 크게 나타났다. 연속적 방법은 기존 보의 경우 개발된 수 위-유량 관계의 이하의 저유량에 적용할 경우 오차가 다소 크게 산정되었으나 그 이외에는 대체로 10% 이내의 오차를 나타내었으며, 일부 저수위의 유속지수법을 제외하면 연속적 방법은 모두 오차가 10% 이내로 조사되었다. 향후 보다 장기간에 걸쳐 다양한 유량 범위에서의 검증이 필요하지만, 시험하천에서의 유량 측정 방법간 비교는 국내 하천에 적용할 수 있는 다양한 방법의 적용성을 평가하는데 기여할 수 있을 것으로 생각된다.향 범위는 최대 $0.07km^2$ 면적에 그 효과를 기대할 수 있을 것으로 판단되어, 남조 수화현상이 심화될 경우 인공순환에 의한 저감효과가 크지는 않을 것으로 예측된다. 조사 기간중 H호의 현존 식물플랑크톤량의 $60%{\sim}87%$가 수심 10m 이내에 분포하였고, 녹조강과 남조강이 우점하는 하절기에는 5m 이내에 주로 분포하였다. 취수탑 지점의 수심이 연중 $25{\sim}35m$를 유지하는 H호의 경우 간헐식 폭기장치를 가동하는 기간은 물론 그 외 기간에도 취수구의 심도를 표층 10m 이하로 유지 할 경우 전체 조류 유입량을 60% 이상 저감할 수 있을 것으로 조사되었다.심볼 및 색채 디자인 등의 작업이 수반되어야 하며, 이들을 고려한 인터넷용 GIS기본도를 신규 제작한다. 상습침수지구와 관련된 각종 GIS데이타와 각 기관이 보유하고 있는 공공정보 가운데 공간정보와 연계되어야 하는 자료를 인터넷 GIS를 이용하여 효율적으로 관리하기 위해서는 단계별 구축전략이 필요하다. 따라서 본 논문에서는 인터넷 GIS를 이용하여 상습침수구역관련 정보를 검색, 처리 및 분석할 수 있는 상습침수 구역 종합정보화 시스템을 구축토록 하였다.N, 항목에서 보 상류가 높게 나타났으나, 철거되지 않은 검전보나 안양대교보에 비해 그 차이가 크지 않은 것으로 나타났다.의 기상변화가 자발성 기흉 발생에 영향을 미친다고 추론할 수 있었다. 향후 본 연구에서 추론된 기상변화와 기흉 발생과의 인과관계를 확인하고 좀 더 구체화하기 위한 연구가 필요할 것이다.게 이루어질 수 있을 것으로 기대된다.는 초과수익률이 상승하지만, 이후로는 감소하므로, 반전거래전략

• Journal of The Korean Association For Science Education
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• v.27 no.7
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• pp.592-608
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• 2007

This study explored the types of conceptual change of 'force' within middle school students' conceptual ecologies. This qualitative study was implemented with the use of classroom observations and two interviews with the participants. 11 middle school students (7 females and 4 males) joined in this study. The interviews with the participants were conducted individually before and after the 'force' unit. The collected data were all transcribed and analyzed interpretively. The results of this study consisted of two parts. First, the participants' conceptual ecologies of 'force' were categorized into 4: epistemological commitments (fixed or interactional explanatory consistency), analogy (attribute, working), metaphysical beliefs (people-oriented ontology, animism, causationism, mixed), and past experiences. Second, two representative cases including 'stable' and 'transitional' states were explained based on the interactions within their own conceptual ecologies. We can see students' conceptions with the integrated perspective in the sense that this results tried to get contextual and interactional understandings of the status of the conception and the possibilities of conceptual change. In addition, it implied that conceptual change research should have the perspective of conceptual ecology evolution in the future.

• Archives of design research
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• v.15 no.4
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• pp.149-156
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• 2002

The success of a product is only possible on the basis of user preference for products and the user preference for products is greatly influenced by the design. Designers have to understand user preference and convert it into the combination of specified design attribute, and after that they should design products which have the image that they want to get. Then the product will be sure to be a hit. Therefore, on the point of view of design, it is necessary to find oui definitely the consumer preference frame : the relationship among design preference - design images - design attribute. This study will give you guidelines on which designers can select and design some more objective and reliable design factors, finding out the relation of cause and effect by which they can know what kind of product designs their consumers like and how the popular image which that products offer is composed of. Therefore, in this study, after we developed the consumer response framework which is proposed by Bloch(1995) : distinct relationship model among preference - design image adjective - design factors, we analyzed the relationship among preference-design image adjective - design factors through the empirical researches. And then we give the way of design.

• Land and Housing Review
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• v.14 no.1
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• pp.67-82
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• 2023

Using the Artificial Neural Network model and Binary Logistic Regression model, this study investigates influence factors on the quality of life in terms of housing environment during the COVID-19 in Seoul. The results show that the lower the satisfaction level of housing policy, the lower the quality of life in the employment field and the lower the quality of residential field. On the other hand, permanent workers and self-employed respondents have experienced improvement in residential quality during the pandemic. A limitation of this study is associated with disentangling the causal relationship using the 'black box' characteristics of ANN method.