• Culinary science and hospitality research
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• v.22 no.2
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• pp.252-269
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• 2016

This study was conducted to analyze the influence of the service quality of the food court on customer satisfaction, revisit intention in a discount store. Among the 400 surveys, 371 participants were collected and 350 respondents were analyzed for the statistical analysis to verify research purposes. SPSS 21.0 program was used to derive the following: factor analysis, reliability analysis, simple regression, and multiple regression analysis. Results shown that, first, service quality at the discount store can affect the customer's satisfaction. The factors which can affect the customer's satisfaction are type, empathy and credibility but guarantee and reactivity don't affect it. Second, service quality at the discount store can affect a customer's revisiting. The factors which can affect the customer's revisiting are type, guarantee, empathy and credibility but reactivity doesn't affect it. Third, the customer's satisfaction at the discount store can affect the customer's revisit intention. Through this study, food court service quality can affect not only the customers' satisfaction but also consumers' revisit intention. Therefore, the company and the management need to keep researching and developing various menus, customer service training, and hygiene training in order to set the customer at ease along with making a comfortable mood and set up a dine out & meeting system.

• Composites Research
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• v.33 no.1
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• pp.1-6
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• 2020

Dispersion and electrical resistance (ER) properties of polyurethane (PU) type topcoat were evaluated using carbon nanotube (CNT) with different CNT weight fraction. CNT was dispersed in PU type topcoat using ultra sonication dispersion method. CNT/PU topcoat was coated on carbon fiber reinforced epoxy composite (CFRC) surface using gravity feed spraying method. Static contact angles of CFRC and CNT/PU topcoat were performed using 4 types of solvents to calculate the work of adhesion between CNT/PU topcoat and CFRC surface. Surface resistance of CNT added PU topcoat was measured to determine CNT dispersion. Adhesion property between CNT/PU topcoat and CFRC was determined via cross hatch cutting test based on ASTM D3359. The optimized condition of CNT weight fraction was found.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1587-1588
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• 2015

일반적으로 국내의 대부분의 전기철도는 단상 교류식이므로 전력계통의 3상 154[kV]을 스코트 변압기를 통해 단상 55[kV]로 변환하여 단상 교류로 공급받는다. 전기철도는 기동 특성 및 제동 특성에 따라 부하의 급증과 급감, 임의의 한 급전 구간 내에 운행 일정 중복으로 다수의 전기철도 차량이 운행될 경우 상호간 전기적 특성이 수시로 변한다. 이와 같은 전기적 특성이 수시로 변하는 전력량은 스코트 변압기에서 전력량을 측정하게 된다. 스코트 변압기 1차측 3상 전력이 2차측 단상 전력으로 변환하는 전기기기이며, 전동차가 제동시 회생전력이 발생되는데 이로인해 스코트변압기의 1차측과 2차측 위상이 다르게 발생되어 계량오차가 발생되는 문제점이 있다. 따라서, 본 논문에서는 계량오차의 문제점을 해결하기 위해, 스코트 변압기 2차측 기준으로 전압과 전류의 위상차를 계산하여 회생전력과 수전전력을 정확하게 계량하여 오차를 판단하고 보정하는 알고리즘을 제시하고자 한다.

• Composites Research
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• v.33 no.6
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• pp.365-370
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• 2020

The icing formation at aircraft occur problems such as increasing weight of the body, fuel efficiency reduction, drag reduction, the error of sensor, and etc. The viscosity of polyurethane (PU) topcoat was measured at 60℃ in real time to set the pre-curing time. SiO2 nanoparticles were dispersed in ethanol using ultra-sonication method. The SiO2/ethanol solution was sprayed on PU topcoat that was not cured fully with different pre-curing conditions. Surface roughness of SiO2/PU nanocomposites were measured using surface roughness tester and the surface roughness data was visualized using 3D mapping. The adhesion property between SiO2 and PU topcoat was evaluated using adhesion pull-off test. The static contact angle was measured using distilled water to evaluate the hydrophobicity. Finally, the pre-curing time of PU topcoat was optimized to exhibit the hydrophobicity of SiO2/PU topcoat.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.6
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• pp.737-744
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• 2021

Spray paving minimizes material lost during the construction or repair of a road surface, and it can be done in conjunction with tack coating. This approach involves applying the asphalt mixture at the same time as spraying the tack coat by attaching a spraying device to the asphalt paver. When applying an asphalt overlay to an aged concrete surface, it is important to ensure the adhesion performance between different material properties. Accordingly, there is a need for a tack coat that can be applied by spray paving and that exhibits good adhesive performance on different materials. In this study, bonding strength tests under various conditions were performed to evaluate the basic performance of a tack coat developed for use with a spray paver. The bonding performance of the tack coat was observed to be affected by curing conditions and material lost during construction. The test results also showed that the tensile and shear bonding strengths of the developed tack coat were 1.21 and 1.99 times higher than those of a conventional one, respectively. As a result, the developed tack coat is considered suitable for application to spray paving.

• Resources Recycling
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• v.10 no.1
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• pp.32-41
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• 2001

Bond shear strengths of recycled asphalt concrete were evaluated under different tack coat applications. Regardless of the new and old mixtures, the bond shear strengths at $30^{\circ}C$ were increased by 10-20% than those at 1$0^{\circ}C$. The bond shear strengths of recycled asphalt concrete without tack coat showed very low ones. These are the main reasons for the frequent longitudinal interface crack in the field. The effect of tack coat curing time on bond shear strengths was inferior to the tack coat construction temperature.

• 지역과문화
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• v.7 no.1
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• pp.183-208
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• 2020

Presenting symbolic concepts consistent with the culture of the host country and international trends at international events will win the favor of the world and raise the image of the host country. The international event mascot symbolically represents the host country's unique culture, and is a good means to enhance the sense of belonging and pride of its members and to display the image of the host country in an outwardly. This study discussed the symbolic elements of the host country characteristics reflected in FIFA's World Cup event mascot. A total of 14 mascots of World Cup events were held from 1966 to 2018, and their materials can be divided into animals, plants, people and creations. The mascot was applied with the characteristic elements of regional specialties, the flag of the host country, symbolic attire, language of the hosting area, social issues and the mascot's dress, posture, props and expression characters of soccer events were used as symbolic elements. First of all, the implications of the research were that mascots were more strongly expressing the "football" signifying element, the theme of events, rather than regional characteristics. Second, the use of 'national flag' was highlighted among the elements of expressing regional characteristics. Third, 'animal' was preferred for mascot material. Fourth, mascots have become integrated with 'cultural perfumes' and play an extended role in raising social awareness. Implications derived from the classification of characteristics and symbol representation elements raised in this study will be used as a basis for the planning of international event mascots.

• Composites Research
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• v.35 no.2
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• pp.80-85
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• 2022

This work presents an experiment study to evaluate the nanoparticle adhesion and surface hydrophobicity characteristics of Teflon-polyurethane top coat depending on the number of multi-wall carbon nanotube (MWCNT) coatings, which is a carbon-based hydrophobic particle. In order to measure the adhesion between the nanoparticles and the top coat, adhesion pull-off test was performed with different MWCNT oxidation times. Static contact angle and roughness measurements were carried out to characterize the surface hydrophobic behavior. Through the roughness evaluation, it was confirmed that the carbon nanotubes were wetted in the Teflon-polyurethane top coat, and the degree carbon nanotube wetting was confirmed through a USB-microscope. As a result, it was found that the larger the degree of wetting, the better the adhesion. From the experimental results, as the hydrophobicity of Teflon-polyurethane increased, the adhesive propertydecreased with the number of coatings. It was possible to improve the adhesive force and determine the number of coatings of carbon nanotubes with optimized hydrophobicity.

• The Safety technology
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• no.172
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• pp.22-23
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• 2012

환한 미소가 가득한 앳된 얼굴, 공을 주시하는 예리한 눈빛, 반대편 코트를 향해 매섭게 내리꽂는 스트로크, 테니스 코트를 울리는 당찬 기합소리. 처음 마주친 김민화(36세) 씨의 모습은 패기 넘치는 여자 테니스 선수의 모습이었다. 하지만 시선을 아래로 향해가면서 또 다른 모습이 시야에 들어왔다. 그것은 바로 휠체어였다. 휠체어에 의지한 몸으로 그렇게 코트를 헤집고 다녔다니, 놀라움과 또한 한편으로는 경외감이 느껴졌다. 김민화씨가 테니스 라켓을 손에 쥔지는 약 1년 정도 그전까지 그녀는 산재의 고통속에서 슬픔을 지워내지 못하고 있었다고 한다. 하지만 지금 그녀의 얼굴에선 조금의 어두운 그늘도 찾아보기가 힘들다. 눈물로 가득했던 마음을 자신감으로 채우고, 다시 한 번 인생의 당당한 주인공으로 우뚝 선 것이다. 무엇이 그녀를 변화시킨 것일까? 따스한 봄바람이 대지를 감싸던 3월의 어느날, 밝은 미소 뒤에 숨겨져 있던 그녀의 지난 일기를 들어봤다.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.73-76
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• 2006

테니스 경기 영상에서 테니스 코트 영역과 선수의 위치를 추적하기 위한 알고리즘을 제안한다. 공의 움직임을 찾기 위해서는 코트와 선수의 위치를 파악해야 하므로 이진화 영상과 형태론적 해석을 통하여 테니스 코트 영역과 선수 영역을 인식하도록 한다. 선수의 위치가 확인되면 공의 움직임이 예측되는 장소를 찾아 공이 지나가는 정보가 제공될 경우 공의 위치를 인식하고 칼만 필터를 이용하여 공의 움직임을 추정하고 공의 위치를 추적한다. 공의 움직임 정보를 이용하여 고속 이동에 의한 이미지의 손실을 개선하는 알고리즘을 제안한다.