• Journal of Digital Convergence
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• v.11 no.4
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• pp.321-330
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• 2013

Lately, in accordance with the improvement of living standards and income level, concern about the health is continuously increasing and the desire is also becoming diverse. This study focused on the user's acceptance of converged smart u-health system. For the study purpose, this paper analyzed the health and technology factors influencing the user's acceptance on u-health system. Thus this study was carried out by using covariance based SEM in order to test the model fitness and path coefficient. As the results, the health management experience among HPM factors and perceived usefulness among TAM had a positive effect on attitude and the perceived usefulness had a direct effect on behavioral intention.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.657-660
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• 2008

The mechanical properties of concrete such as compressive strength, tensile strength, and modulus of elasticity, are considerably influenced by various factors including locality. The material property prescriptions in national concrete design codes should reflect them. In Korea, they have not been studied systematically yet. A new performance-based design code is being prepared in Korea as a government-supported project and it has a plan to make new material prescriptions adopting domestic research results. As a starting point for the research on material properties, the statistical characteristics of mechanical properties of concrete are studied. In this paper, a probabilistic model of compressive strength, relationship between compressive strength and splitting tensile strength and compressive strength and elastic modulus are proposed based on experimental data.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.1
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• pp.63-69
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• 2010

Ensemble is one of widely used methods for improving the performance of classification and prediction models. Two popular ensemble methods, Bagging and Boosting, have been applied with great success to various machine learning problems using mostly decision trees as base classifiers. This paper performs an empirical comparison of Boosted neural networks and traditional neural networks on bankruptcy prediction tasks. Experimental results on Korean firms indicated that the boosted neural networks showed the improved performance over traditional neural networks.

• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.550-559
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• 2015

We empirically examined the effect of sponsorship on firms' performance. Among many indices measuring a firm's performance, we focused on its revenue and revealed that the performance of players sponsored by the firm has a significant and positive impact on the firm's revenue. In light of transaction data on sports equipments from its importer, our paper makes the following primary contribution by empirically examining the short run effect of sports sponsorship. We believe our findings based on the field data provide strong implications for firms faced with similar decisions.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.8
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• pp.726-736
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• 2012

This paper deals with Spin/Stall Recovery Parachute System from design to ground taxiing stage which would be deployed on the high speed taxi of turbo-prop airplane. In detail design phase, design parameters- riser length, parachute type, size, porosity, parachute canopy filling time, and deployment method- were considered based on the analytical disciplines such as aerodynamics, structures, and stability & control. Before the installation of Spin/Stall Recovery System of turbo-prop airplane, all control functions of this system were validated by the SBTB(System Breakout Test Box) in the laboratory. SBTB was used to confirm if it can detect faults, and simulate the firing of pyrotechnic devices that control the deployment and jettison of it. Once confirmed normal operation, deployment of parachute on the high speed taxiing were performed.

• Journal of the Korean Geotechnical Society
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• v.27 no.7
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• pp.59-68
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• 2011

Subsurface Investigation results always reflect a level of soil uncertainty, which sometimes requires statistical corrections of the data for the appropriate engineering decision. This study suggests a closed-form framework to extract the outlying data points from the testing results using the statistical geo-spatial information analyses with outlier analysis and kring-based crossvalidation. The suggested analysis method is conducted to soil stratification using the borehole data in Yeouido.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.764-768
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• 2010

수자원의 근간이 되는 빗물의 효율적 사용을 위하여 최근 우리나라도 빗물이용시설(Rainwater Harvesting System, RHS)이 많이 도입되고 있는 실정이다. 이런 RHS의 효율적인 설계 및 유지 관리를 위해서는 해당 건물의 물 사용량과 집수되는 빗물의 양이 고려된 적정 저류용량 산정이 필수이다. RHS의 적정 저류용량 산정을 위해서는 강수량에 따른 저류용량과 부족량간의 확률적 관계를 제시하는 것이 중요하다. 이에 강우와 물 사용량의 실측값을 이용하여 저류용량에 따른 부족률을 도출하는 모의모형을 구축하였으며, 그 결과를 통하여 저류용량과 부족률간의 관계를 확률 분포로 제시하였다. 적용대상은 서울대학교 34동이며 적합 확률분포로는 Generalized Logistic 분포임을 검증하였고 재현기간에 따른 저류용량별 부족률을 제시하였다. 그 결과 $18m^3$ 이상의 저류용량을 가지는 RHS 설치는 재현기간을 막론하고 효율성이 없음을 판단하였다. 본 연구를 통해 구축된 모의 모형과 재현기간에 따른 저류용량별 부족률은 RHS의 설계와 의사결정에 관련된 이 해당사자들의 직관적 판단 도구로 활용이 가능할 것이다. 향후, 좀 더 신뢰성 있는 자료를 산정하기 위해서는 일강우량에 따른 일화장실 물사용량의 실측자료를 모의 모형에 적용시켜야 할 것이다.

• Asia Marketing Journal
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• v.6 no.1
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• pp.57-86
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• 2004

인터넷관련 혁신의 수용을 설명하려는 많은 연구들에서 정보기술수용모델(TAM)이 적용되었지만, 온라인 상거래의 수용을 정확히 설명하기 위해서는 인터넷을 통해 상거래를 할 때 발생하는 특성을 반영해야 한다. 본 연구에서는 온라인 상거래관련 기존 연구들을 바탕으로 TAM을 확장하는 변수로 신뢰와 감정을 추가하고 변수들의 영향 관계를 통합적으로 구조화하였다. 이러한 확장 구조를 통해, 온라인 상거래 수용을 설명하는데 TAM의 원형을 그대로 적용하거나 신뢰 혹은 감정만을 고려한 기존 연구들이 갖는 설명의 제한점을 극복하고자 하였다. 그리고 온라인 상거래의 수용에 대한 전체적인 틀을 파악하고, 소비자가 온라인 상거래를 수용하는 측면에서 온라인 상거래의 성공을 결정짓는 주요한 변수들의 관계를 명확히 하였다. 신뢰, 감정, 사용의 용이함이 유용성을 지각하고 사이트 사용의도를 갖고 상거래 행동을 하는데 영향을 주며 이들 변수들간에도 영향관계가 있다는 모델을 제안하였고, 대안적으로 감정을 태도의 요소로 보는 모델과 신뢰가 감정이 전혀 관계가 없다는 모델을 제시하였다. 모델들을 비교한 결과 제안모델이 가장 우수하다고 판단할 수 있었다. 각 변수들의 경로계수에 의해 가설을 검증한 결과, 감정과 사용의 용이함은 유용성에 정적으로 유의하게 영향을 주었고 신뢰는 어느 정도 영향을 주었다. 그리고 신뢰와 사용의 용이함은 감정에도 유의하게 영향을 주었다. 그렇지만 사이트 사용의도에 유의하게 영향을 미치는 변수는 사용의 용이함 뿐이었다. 실증연구를 바탕으로, 온라인 상거래가 사용자 수용 측면에서 성공을 할 수 있기 위해서는 사용의 용이함과 함께 신뢰와 감정이 중요하게 고려되어야 함을 알 수 있다.

• Journal of the Korean Association of Geographic Information Studies
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• v.6 no.1
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• pp.59-77
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• 2003

This study is to validate the use of macro language for the land suitability analysis aiming to help to resolve land use conflicts. The silver-town suitability analysis is conducted on the Geejang Gun, Busan Metropolitan city. Such digital maps as terrain, road, facility, and water body were created for various cartographic models. A cartographic model identified the best suitable areas for silver-town development based on the such site selection variables as a distance to facility and road, slope and aspect of terrain, land use etc. Then, the other cartographic model identified the most favorable site among the candidate sites based on the comparison of the aspect of proximity, usage and environmental quality. Macro language was used for these modeling process and was used for the manipulation of all these spatial variables used in the models to resolve land use conflicts relating to the decision making process of the final site selection. This study will improve the effectiveness and rationality of the traditional site suitability analysis.

• Archives of design research
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• v.18 no.3 s.61
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• pp.15-24
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• 2005

There is a large waste of time, money, and production through the infelicitous product design process in small and medium enterprises. They don't possess enough career-manpower with respect to design. Especially, the objective and scientific approach process isn't presented very well on the 'establishment concept' of the embodiment phase or 'Sketch and Rendering' of the development phase which are the most important design processes. So, this research is applied to the conception of the AHP method. It uses the basic concept of relativity to decrease risk from the calculational quantity data, and supplement the decision making phase. Generally, human beings can conclude by relative judgement which is more influenceable than absolute judgement. So we must use the relative comparison concept rather than the comparison of two items with variable sketches based on characteristics of human beings. Thus, efficiency judgement is dependent on design sketch comparisons which help the consistency progress of variable alternative plans. We can decrease risk when we chose the final design and increase efficiency of the design decision making. That is now a perfect selection of each alternative's ranking and sensitive design result but this research will provide consistency criterion on filtering and lead to variable design alternatives. The significance of this research is the efficiency method that overcomes differences of character and sensitivity on many phases of the process. Finally, this research proposes a new ideal process that where applied improves quality and evidence of propriety through comparison to existing methods result in method application research for improvement quality.