• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.594-600
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• 2011

"The guidelines on the management of indoor air quality of public transportation" was enacted in December 2006 due to the fact that the interest and demand of improving the air quality for citizen using public transportation have been increased. Thus this research has considered what has influenced on the passenger cabin HVAC as well as the improvement of customer service as we proceed the study for better indoor air quality inside of the train by developing the module of cleaning air system for pollutants of a car air.

• 한국항행학회논문지
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• 제20권2호
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• pp.141-147
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• 2016

항행안전시설에서 제공되는 항행정보의 서비스를 지속적으로 향상시켜 공항 운영 경쟁력 증진과 항행정보 이용자인 항공기 조종사, 항공교통관제사, 항공사, 및 일반인에게 안정성과 신뢰성 있는 항행정보 서비스 제공이 필요하다. 항행시설 안전성숙도 평가(ASMS; ANSP safety maturity survey)는 항행안전시설 분야의 조직 경영, 안전과 위험관리, 정책 기준 절차관리, 교육훈련 및 근무환경 등 유지관리 및 안전관리 필수요건들이 어느 수준까지 충족하는지를 평가하는 체계이다. 동 평가개발의 추진방침은 국제운영 우수사례 (Eurocontrol, FAA) 등 안전성숙도 평가모델 분석기법을 벤치마킹하여 국내 항행시설 평가체계 분야에 적용하고, 항행시설 유지관리 및 안전도의 계량적인 수준 측정을 위한 핵심 구성요소 발굴을 통해 유지관리(management) 분야의 26개 평가항목 및 안전관리(safety) 분야의 23개 평가항목으로 구성된 평가모델을 개발하였다. 항행시설 안전성숙도평가를 통해 항행안전시설의 성능개선 및 안전사고 예방은 물론 각종 서비스 향상을 유도하여, 이용자에게는 최상의 항행정보를 제공하기 위한 것이다.

• 한국조리학회지
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• 제14권4호
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• pp.269-282
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• 2008

Quality is recognized as one of the key components of business strategies. In this respect, this study aims to investigate quality factors that influence customer satisfaction and loyalty in Korean Tofu restaurants and promote the quality improvement in their service operations. The experimental data were collected from the questionnaire answered by 130 customers in Seoul and Kyonggi area. They were statistically analyzed using SPSS Win.12.0. For statistical analysis, frequency, factor analysis, reliability analysis, and regression analyses were conducted. The results of the analyses show that two dimensions such as "empathy" and "IT use" influence the satisfaction of customers. "Empathy", "tangibles", "well-being food", and "customer satisfaction" were identified as critical factors influencing the loyalty of customers.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권8호
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• pp.2783-2804
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• 2021

In the network function virtualization environment, dynamic changes in network traffic will lead to the dynamic changes of service function chain resource demand, which entails timely dynamic adjustment of service function chain resource configuration. At present, most researches solve this problem through virtual network function migration and link rerouting, and there exist some problems such as long service interruption time, excessive network operation cost and high penalty. This paper proposes a dynamic adjustment method of service function chain resource configuration for the dynamic changes of network traffic. First, a dynamic adjustment request of service function chain is generated according to the prediction of network traffic. Second, a dynamic adjustment strategy of service function chain resource configuration is determined according to substrate network resources. Finally, the resource configuration of a service function chain is pre-adjusted according to the dynamic adjustment strategy. Virtual network functions combination and virtual machine reusing are fully considered in this process. The experimental results show that this method can reduce the influence of service function chain resource configuration dynamic adjustment on quality of service, reduce network operation cost and improve the revenue of service providers.

• 한국항공운항학회지
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• 제18권3호
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• pp.55-69
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• 2010

The role of airports in the metropolitan area in Korea is very important which is located on the center of Northeast Asia considered as the highest potential growth continent in the world air transport market. This study includes comparison on service quality between Gimpo Airport and Incheon Airport which are indicated as multi-airport system in the metropolitan area appraised by passengers from Korea, Japan and China, and analysis on primary factors of airport service which affect the customer satisfaction and loyalty. The service quality appraised in the order of Chinese, Korean, and Japanese and the analysis result indicated that the service quality factors which influence on customer satisfaction and loyalty were all different among passengers from three countries. Information service was the priority factor for customer satisfaction to Chinese and Korean, but Japanese considered that personal service was the most important factor. This research paper tried to provide many current issues and guides to operational strategy including plan for the specialized routes of multi-airport system in domestic metropolitan area.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제2권4호
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• pp.298-304
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• 2021

This study aimed to determine the applicability of drones and air quality sensors in environmental monitoring of air pollutant emissions by developing and testing two new methods. The first method used orthoimagery for precise monitoring of pollutant-emitting facilities. The second method used atmospheric sensors for monitoring air pollutants in emissions. Results showed that ground sample distance could be established within 5 cm during the creation of orthoimagery for monitoring emissions, which allowed for detailed examination of facilities with naked eyes. For air quality monitoring, drones were flown on a fixed course and measured the air quality in point units, thus enabling mapping of air quality through spatial analysis. Sensors that could measure various substances were used during this process. Data on particulate matter were compared with data from the National Air Pollution Measurement Network to determine its future potential to leverage. However, technical development and applications for environmental monitoring of pollution-emitting facilities are still in their early stages. They could be limited by meteorological conditions and sensitivity of the sensor technology. This research is expected to provide guidelines for environmental monitoring of pollutant-emitting facilities using drones.

• 한국식품영양학회지
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• 제30권3호
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• pp.609-617
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• 2017

This experiment was carried out to enhance the availability of blackberry. Since it is difficult to use blackberry as a fresh fruit, we investigated the quality characteristics of blackberry powder obtained by various drying methods (freeze drying and hot-air drying at $40{\sim}80^{\circ}C$). The L- and b-values of freeze-dried powder was higher than hot-air dried powder. The pH (3.2) was lowest and the acidity (14.4%) was highest in freeze-dried powder. In freeze drying, the brix degree was $65.7^{\circ}Bx$, but it increased from $54.7^{\circ}Bx$ to $68.5^{\circ}Bx$ with increasing temperature during hot air drying. The total polyphenol and flavonoids contents were the highest in freeze-dried powder, at 9.3 and 6.2 mg/g, respectively. The levels increased as temperature increased in hot air drying. Anthocyanin content in freeze-dried powder was 8.51 mg/g, while it sharply decreased to 1.17~2.45 mg/g in hot-air drying. Vitamin C content in freeze drying ($979.4{\mu}g/g$) was higher than that in hot-air drying ($48.3{\sim}303.2{\mu}g/g$). The sample concentration required for 50% reduction of DPPH free radical scavenging ($RC_{50}$) was $79.7{\mu}g/mL$ in freeze drying, and showed high antioxidant activity. Also it decreased from $122.4{\mu}g/mL$ to $87.7{\mu}g/mL$ with temperature increase during hot air drying. We therefore conclude from the above results that freeze drying is more suitable for the production of blackberry powder, because this method showed high value of chromaticity, total polyphenol, flavonoid, anthocyanin content, vitamin C and antioxidant activity.

• 한국컴퓨터정보학회논문지
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• 제15권11호
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• pp.195-204
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• 2010

본 논문에서는 유비쿼터스 컴퓨팅 환경에서 환경 관제 서비스를 제공하는 효과적인 실내 환경 관제를 위한 시스템을 제안한다. 환경 관제 시스템은 사용자 환경에 대한 정보를 수집하여 실내 공기질 유지 관리 규정에 따라 쾌적한 환경을 유지하고 실내 환경을 건강하게 유지하기 위한 시스템이다. 환경 관제 서비스를 제공하기 위해서 유비쿼터스 컴퓨팅 환경에서 서비스의 개발과 지원을 위한 액티브 모델 기반의 분산 프레임워크와 서비스 지향 아키텍처를 사용하였다. 본 논문에서 제안한 환경 관제 시스템의 수행성을 검증하기 위해 컴포넌트의 동작을 보이고 환경관제 서비스의 GUI화면을 통해 결과 화면을 보였다.

• ESCO지
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• 통권5호
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• pp.60-65
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• 2000

• 융합경영연구
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• 제9권2호
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• pp.21-31
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• 2021

Purpose: This study aims to provide marketing implications for training and face-to-face service employee communication by analyzing how communication by Korean crews at foreign airlines affects passengers' perception and how this perception relates to airline service quality and customer satisfaction. Research design, data: The collection of questionnaires for the demonstration in this study has collected 300 questionnaires for about a month for Korean passengers who are aware of the presence of Korean crew on board aircraft. Results: The study analyzed the relationship between the communication ability, customer satisfaction, and reuse intention of foreign airlines. An empirical analysis of the relationship between quality of airline service, customer satisfaction, and intention of re-use can suggest the following implications based on the language and non-verbal communication capabilities of the Korean crew working for foreign airlines. Conclusions: We studied the impact of communication between Korean crews working for foreign airlines on the quality of airline service, customer satisfaction and reuse intention. The Korean crew should also work for overseas airlines and consider communication as important and expand their overall foreign language education and communication skills to have a positive impact on not only Korean passengers but also their own citizens.