• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.337-338
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• 2018

In recent years, residential apartment building parking lots are built in underground spaces, and with conjunction to improve the environment of the urban area, artificial greeen roof systems are installed on the upper slabs. However, early plant growth are resulting in root penetration into concrete cracks and in turn into the waterproofing membranes, leading to degradation and damaging of the waterproofing system and structural durability. This issue highlights a problem of conventional maintenance system of concrete structures, and proposals for amendments follow. In this study, a waterproofing and root barrier construction design for the upper slabs of residential building underground parking lots is proposed, and motioned to be added into future construction specifications.

• 한국의상디자인학회지
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• 제17권1호
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• pp.69-82
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• 2015

This study is conducted to verify out whether any important differences can be made with factors of service qualities by the population statistics and trait of skin care shops. And this study is conducted to find out the relation that service qualities may influence on switching barrier and customer satisfaction. For this study, 396 questionnaires were used which had been returned from the customers of the skin care shops of Seoul, Gyeonggi and Chungchyung provinces from 15th April to fifth May, 2013. To analyze above data, frequency analysis, t-test, ANOVA, factor analysis, regression analysis are carried out by using an SPSS 18.0 statistical package. The results are as follows : The features of services of the skin care shops are analyzed into four factors which were Assurance, Materiality, Responsiveness, Agreeability. The features of switching barrier are analyzed into three factors which are Alternative attractiveness, Interpersonal relationship, Switching cost. There are important differences in the concept four service qualities of skin care shops by the features of the statistics of population according to sex, marriage, monthly income and the types of job. The four features of service qualities of the skin care shops have positive influences on the three features of switching barrier - Assurance, Responsiveness, Agreeability and the three features of customer satisfaction - Assurance, Materiality, Agreeability. Through this study, We can have the conclusion that the switching barrier made by the building up the qualities of service can prevent the customers from dropping away.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제17권3호
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• pp.43-51
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• 2011

The mobility and accessibility enhancement is gradually becoming a global interest due to the growth in the aging population and concerns about people with disabilities. The main purpose of this study is to know the current situation in barrier-free level in railroad facilities in order to allow the mobility handicapped to travel in a safe and convenient manner. The research has started with investigating current situation for the mobility handicapped people and explores the needs of barrier-free facilities. 84 domestic railroad facilities were evaluated based on assessment tool developed from the mobility handicapped act. As a result, the fact that the mobility handicapped experienced limited accessibility due to various types of obstacles in the facilities was discovered. Based on the evaluation, obstacles in the facilities were analyzed and categorized by specific dimensions, users' accessibility, mobility, usability, and clarity (way-finding). This study suggests barrier-free design for passenger facilities focused on train station. Because mobility and accessibility are emphasized in current society, improvement of the mobility handicapped' movement should be considered. Barrier-free design for passenger facilities should be realized throughout comprehending the reasons why these obstacles occur in the facilities not using installation convenience facilities. This study has meaning in finding out the obstacles in each cause of occurrence(accessibility, mobility, usability, and clarity (way-finding)).

• 한국콘텐츠학회논문지
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• 제21권11호
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• pp.193-202
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• 2021

배리어 프리는 보행 약자들이 시설물의 접근이나 이동에 불편함을 느끼지 않도록 공간을 계획, 설계, 시공하는 것을 의미한다. 이러한 차원에서 본 연구는 공간정보와 가상현실 기술을 이용하여, 배리어 프리에 영향을 주는 물리적인 요소를 식별하고 자유로운 이동에 필요한 정보를 제공할 수 있는 콘텐츠를 개발하는데 목적이 있다. 이를 위해 본 연구는 관련 문헌 검토를 통해 배리어 프리에 영향을 주는 물리적인 장애 요소에 대하여 검토하고, 이를 토대로 콘텐츠 개발에 필요한 주요 기능을 도출한다. 그리고 실험 지역을 대상으로 콘텐츠 개발에 필요한 3차원 공간정보와 가상현실 서비스를 구축한다. 마지막으로 가상의 시나리오를 설정하여 실험 콘텐츠에서 개발된 주요 기능의 유용성과 활용성을 검토한다. 본 연구를 통해 개발된 보행 약자를 위한 배리어프리 서비스 콘텐츠는 공공 시설물 구축을 비롯한 다양한 분야에 폭넓게 활용될 수 있을 것으로 판단된다.

• 한국자동차공학회논문집
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• 제3권2호
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• pp.62-76
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• 1995

The safety analysis becomes very essential in the crash environment with the growth of automobile industry. Recently, an airbag system is required to protect the occupant. The effects of an airbag can be evaluated exactly from the barrier or sled test which is quite expensive. The airbag system in a passenger car is analyzed with the occupant analysis program. The modeling of the passenger car including an airbag is established and the results are verified by comparisons with real crash tests. However, the solution of an airbag design can not be obtained easily with the conventional method such as an optimization due to the nonlinearity and complexity of the problem. An iterative design algorithm using the orthogonal array is proposed to overcome the difficulties. The design trend of an airbag is recommended to minimize the injury of an occupant with the proposed design algorithm and the results are discussed.

• 한국군사과학기술학회지
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• 제23권5호
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• pp.435-443
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• 2020

Thermal barrier coating(TBC) applied to fighter and turbine engines is a technology that improves the durability of core parts by lowering the surface temperature of base material. The thermal stress caused by mis-match of the coefficient of thermal expansion between the top coating and the TGO interface is the main cause of TBC breakage. Since the thermal stress is dependent on the microstructure of the TBC, designing microstructure of TBC can improve the durability as well as lower the thermal stress. In this study, the effect of coating thickness, volume of porosity and vertical cracking on the thermal stress was analyzed through finite element analysis. Through the analysis results, a design range of a microstructure that can improve the durability of thermal barrier coating by lowering thermal stress is proposed.

• 한국군사과학기술학회지
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• 제18권1호
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• pp.93-99
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• 2015

The dual pulse rocket motor(DPRM) distributes the propellant energy effectively via pulse separation device(PSD) to improve the range and terminal velocity of the missile. There are two types of PSD such as bulk head type and thermal barrier type. A subscale thermal barrier type DPRM was designed, manufactured, and tested. The results showed good understanding of the characteristics of the PSD and will be applied to the design of the full scale DPRM.

• Wind and Structures
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• 제14권1호
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• pp.55-70
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• 2011

This study investigates the design criteria required for wind barriers to protect vehicles running on an expressway under a high side wind. At the first stage of this study, the lateral deviations of vehicles in crosswinds were computed from the commercial software, CarSim and TruckSim, and the critical wind speeds for a car accident were then evaluated from a predefined car accident index. The critical wind speeds for driving stability were found to be 35 m/s for a small passenger car, yet 30 m/s for a truck and a bus. From the wind tunnel tests, the minimum height of a wind barrier required to reduce the wind speed by 50% was found to be 12.5% of the road width. In the case of parallel bridges, the placement of two edge wind barriers plus one wind barrier at center was recommended for a separation distance larger than 20 m (four lanes) and 10 m (six lanes) respectively, otherwise two wind barriers were recommended.

• 대한토목학회논문집
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• 제29권1D호
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• pp.101-110
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• 2009

우리나라의 도시공간에는 교통약자들의 이동을 어렵게하는 많은 장애 요소들이 산재되어 있다. 이러한 문제를 해결하기 위하여 2006년 1월 "교통약자의 이동편의증진법(이하 이동편의증진법)"이 제정되었으며 이동성확보를 위한 각종 시설정비가 법적근거 하에 추진되기에 이르렀다. 그러나 강제적 규제를 위한 기준을 수립하는 법률의 속성상 이동편의증진법에 설정되어 있는 각종 기준들은 교통약자들을 위한 최소 기준을 제시하고 있을 따름이며, 교통약자들의 쾌적하고 편안한 이동을 보장하기에는 충분하지 않다는 비판이 제기되고 있다. 따라서 이러한 문제를 해결하기 위해서는 교통약자들의 실제적 편의에 근거한 보다 엄격한 시설 설치기준이 마련되어야 할 필요가 있다. 본 연구의 목적은 이러한 관련 법제도상에서 제시되고 있는 교통약자를 위한 각종 기준 및 이러한 기준에 의해 건설된 보행로의 현황과 문제점을 분석하여 현재 시행 초기단계에 있는 BF 인증제도의 기준에 대한 개선 방향을 제시하고, 개선된 기준을 바탕으로 실제 보행로를 평가하여 BF 디자인 측면에서의 보행로 설계상 개선이 요구되는 사항들을 분석하는데 있다. 이를 위하여 본 연구에서는 국내의 관련 법제도들을 선진국 사례와 비교분석하고 그 결과를 토대로 현재 우리나라 보행로 설계 기준에 근거하여 건설된 보행로들의 BF 설계 수준을 현장조사를 통해 분석하였다.

• 월간포장계
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• 통권146호
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• pp.46-48
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• 2005