• 한국통신학회논문지
• /
• 제25권4B호
• /
• pp.675-682
• /
• 2000

본 논문에서는 ATM 네트워크에서 다양한 멀티미디어 트래픽을 효율적으로 전송하기 위해 동적 우선순위 셀 전송 스케쥴링 기법인 AWRR/DT(Adaptive Weighted Round Robin with Delay Tolerance)를 제안하였다. AWRR/DT는 멀티미디어 트랙픽을 지연 특성에 따라 여러 개의 실시간 클래스와 하나의 비실시간 클래스로 분류하고, 각 클래스의 지연 특성과 입력 트래픽의 양을 고려하여 매 사이클마다 해당 클래스에 적절한 가중치(weight)를 할당 하도록 설계되었다. 또한, 제안한 알고리즘은 셀 폐기 메커니즘을 가지고 있어서 순간적인 서비스 품질(QoS:Quality of Service)열화가 계속 연속적으로 이어지는 현상을 줄여준다. AWRR/DT의 성능을 평가하기 위하여, SLAM II를 이용한 컴퓨터 시뮬레이션을 통해 기존의 스케쥴링 기법들과 평균 지연 측면에서 비교하였다. 그 결과, 제안한 기법이 실시간 트래픽 클래스의 QoS를 만족하면서도 비실시간 트래픽 클래스의 평균 지연을 감소시키 수 있음을 확인하였다.

• 산학경영연구
• /
• 제23권1호
• /
• pp.107-128
• /
• 2010

강원동해안은 자연적인 아름다움과 수많은 경승지, 다양한 관광매력물을 보유한 국내 최고의 관광지로서 알려져 왔다. 그중에서도 동해안와 해변은 여름철 가장 즐겨찾는 국민관광지이자 가장 핵심적인 해양관광지로서 오랫동안 확고한 위치를 차지하고 있으며, 타지역에 비해 뛰어난 자연경관미와 청정성 등의 해양관광환경을 자랑하는 곳으로 자리매김 해왔다. 그러나 그동안 강원 동해안 해변은 환경훼손 및 쓰레기 문제, 입장료나 주차료 등 해변운영과 관련된 요금징수 문제, 편의시설의 부족, 알뜰피서 행위나 소비수준의 저하와 같은 소비행태의 문제, 혼잡도 증가로 인한 만족도 저하, 체험프로그램의 미흡, 호객행위나 바가지 요금, 서비스 품질의 문제 등 다양한 문제들이 지속적으로 제기되어 왔다. 최근에는 여름철 저온현상과 같은 기상이변으로 인한 피서객 감소와 지역경제에 대한 부정적 영향이 우려되고 있기도 하다. 따라서 본 연구에서는 이와 같은 쟁점들을 중심으로 강원 동해안의 해변운영과 관련된 주요 현안들에 대해 심도있게 살펴보고 그 개선방안에 대해 제시함으로써 해변운영의 발전방안을 모색하는데 그 의의를 둔다.

• 방송공학회논문지
• /
• 제20권1호
• /
• pp.16-25
• /
• 2015

초고품질 멀티미디어에 대한 사용자 요구가 증가하고 있지만, 현재 방송 환경으로는 고해상도 대용량의 UHD 콘텐츠를 저작, 인코딩, 재생 및 전송하기 어렵다. 따라서 사용자 요구를 만족하기 위한 UHD급 영상을 지원하는 디스플레이, UHD 서비스를 수신하는 단말기 그리고 대용량의 데이터를 수용할 수 있는 네트워크 등 다양한 분야의 기술들이 빠르게 발전하고 있다. 이에 본 논문에서는 UHD 미디어 전송을 위해 스케일러블 비디오 코딩을 이용하여 영상을 부호화하고 이를 각 계층별로 다른 네트워크를 통해 전송하는 송신시스템과 분리되어 수신된 비디오 스트림을 하나의 영상으로 재생하는 수신 시스템을 설계한다. 제안 시스템은 이 기종 망을 이용함으로써 사용자의 수신 환경에 적응적으로 HD와 UHD 콘텐츠를 모두 지원할 수 있다.

• 한국정보과학회논문지:시스템및이론
• /
• 제30권11호
• /
• pp.675-690
• /
• 2003

시스템과 네트워크 클라이언트의 제한된 리소스를 이용하여 다수의 사용자가 참여 가능하고 사용자의 QoS를 만족시키는 분산 가상 시스템에 대한 연구가 활발히 진행되고 있다. 이러한 분산 가상 시스템을 구현하기 위해서는 사용자의 증가에 따른 네트워크 트래픽 증가 문제, 네트워크 지연으로 발생하는 클라이언트간의 동기화 문제, 가상 환경 렌더링에 따른 시스템 부하 등의 문제를 해결해야 한다. 본 논문에서는 3인칭 시점의 가상 댄싱 공간을 구성하여 아바타간의 상호 작용을 지원하고 사용자가 느끼는 화질에 따라 네트워크를 통해 전송되는 데이타의 양을 달리하는 계층적 QoS 모델을 제안한다. 계층적 QoS 모델은 화면을 보는 사용자의 시점에 기반하여 가상 댄싱 공간에서 보여지는 아바타의 화질을 조절하는 Visual QoS와 아바타의 영향 범위 및 아바타간의 거리에 의해 사용자에게 들리는 소리의 크기를 조절하는 Audio QoS로 구성된다. 이 기법의 효율성을 검증하고자 Sun사의 JMF와 Java3D를 이용하여 사용자의 실영상과 3D CG 아바타가 참여하는 가상 댄싱 공간을 구현한다. 본 논문에서 제안한 계층적 QoS 모델이 다수의 아바타가 참여하고 아바타의 밀집도가 높은 가상 댄싱 공간을 효과적으로 지원할 수 있다는 것을 TIE 시스템의 성능 실험과 시뮬레이션을 통해 확인한다.

• 한국병원경영학회지
• /
• 제14권4호
• /
• pp.25-51
• /
• 2009

This model was empirically developed to test the effect of medical service quality and hospital's reputation on customer satisfaction, repurchase intention, and negative word of mouth as to disease severity. The model was tested in the context of the hospital industry. The findings are as follows. First, medical service provider's functional quality and technical service quality have significant effect on customer satisfaction. Second, hospital's reputation has positive(+) effect on customer satisfaction and significant negative effect on negative word of mouth. Third, customer satisfaction with medical service quality has significantly positive effect on customer's repurchase intention and has negative(-) effect on customer's negative word of mouth. Furthermore, customer's negative word of mouth has negative effect on their repurchase intention. Fourth, as to different disease severity, medical service quality and hospital's reputation have different effect on customer satisfaction, repurchase intention, and negative word of mouth. When patients get slightly ill, functional service quality and technical service quality have direct influence on customer satisfaction which has positive influence on repurchase intention and negative influence on negative word of mouth. Finally, negative word of mouth has negative effect on customer's repurchase intention. However, while hospital's reputation doesn't have effect on customer satisfaction, the reputation has significantly negative effect on negative word of mouth. When patients get seriously ill, only functional service quality has positive effect on customer satisfaction which influences on customer's repurchase intention and negatively influences on negative word of mouth. On the contrary, negative word of mouth doesn't influence on customer's repurchase intention as patients want to treat serious diseases in the large general hospitals even though negative word of mouth is known to them.

• 보건의료산업학회지
• /
• 제4권1호
• /
• pp.59-70
• /
• 2010

The purpose of this study is to examine how much the service quality of the radiology department at the hospital is influential to customers' satisfaction and intents of reusing the department and informing it to others. For the purpose, this researcher surveyed 201 patients whon used the radiology department at the hospital. Findings of the study can be summarized as follows. First, the surveyed patients' perceptions of the service quality of the radiology department in accordance with their demographic characteristics were investigated to find that among the subjects, women were perceiving the radiological technician as more kind than men were. Among the subjects, women were higher in customer satisfaction about the service quality of the radiology department and intents of reusing the department and informing it to others than men were. Second, out of factors of the radiology department's service quality, those who were significantly affecting customer satisfaction included waiting time for treatment at the department, kindness of the radiological technician, environment of the radiography room and facilities of the department. Third, customer satisfaction was significantly affecting the intent of reuse. Fourth, customer satisfaction was significantly influencing the intent of informing to others. In other words, the more customers are satisfied with the service quality of the radiology department, the more they are likely to inform the department to others and reuse it. In conclusion, the sustainable growth and effective management of the medical institution requires improving the service quality of its department of radiology and thereon maximizing customer satisfaction.

• 한국통신학회논문지
• /
• 제39C권7호
• /
• pp.538-545
• /
• 2014

본 논문은 다운링크 다중 선박 네트워크에서 동적으로 협력 전송(CoMP Transmission; Coordinated Multi-point Transmission)을 사용하는 유틸리티 함수를 도출하고 이를 기반으로 스케줄링 기법을 제안한다. 제안하는 스케줄링 기법은 수율과 공정성을 고려한 PF 형태의 유틸리티 함수를 최대화하기 위해서 매 프레임 협력적 전송 여부를 결정하고, 유틸리티 함수를 최대화하는 사용자를 선택한다. 특히 제안하는 유틸리티 함수 기반의 스케줄링 기법은 셀 경계 지역에 위치하는 사용자의 서비스 품질을 만족시키는 것을 목적으로 한다. 무선 환경에서 PF(Proportional Fair) 스케줄링을 사용할 때 제안한 유틸리티 함수를 기반으로 하는 스케줄링 기법의 성능을 평가한다. 모의실험을 통하여 제안하는 스케줄링 기법은 협력적 통신 네트워크와 비협력적 통신 네트워크를 동적으로 사용함으로써 전체 네트워크의 성능을 유지하면서 가장자리에 있는 선박의 성능을 향상시키는 것을 확인하였다.

• 한국경영과학회지
• /
• 제33권2호
• /
• pp.45-73
• /
• 2008

Quality has long been considered as an important factor in creating competitive advantage, and researches on quality have not been limited to off-line products but actively extended to e-services and information goods. However, given the nature of multi-dimensional aspect of quality, the systematic study on the quality of online service is still in its early stage. Especially, studies on the quality of ASP services have been rare in academic and professional journals despite the growth of ASP industry in its size and the rapid expansion in the range of application. In this paper we clarified the multi-dimensional quality aspects of the ASP service using a Garvin's framework (1984) which encompasses the service aspects of Products, and developed a measurement model for ASP service qualify. Then we empirically tested the effects of ASP service quality on user satisfaction and perceived firm performance using the data from 240 Korean small firms with less than 50 employees that had experienced the ASP service. Our results show that there are positive relationships among ASP service quality and personal performance, user satisfaction and perceived firm performance, and that product and service-related aspects of ASP service exert differential effects on performance measures so that the product-related aspects of the ASP service such as performance, features, reliability and conformance are considered to be more important in evaluating benefits from ASP services. Contrary to the approaches In literature where only the quality of online services is evaluated, our results emphasize the importance of differentiating Product and service-related aspects of ASP service and provide a basis for more comprehensive evaluation of ASP service quality.

• 한국식생활문화학회지
• /
• 제14권4호
• /
• pp.305-317
• /
• 1999

An attempt was made to provide valuable information to improve service quality and customer satisfaction for in-flight catering service. The customers' demographic characteristics that impact on service quality and customer satisfaction were examined for a group of customer. 474 customers who have been used the airplane within 1 year were participated in this study. Statistical analysis was performed using SAS software program (version 6.01) for descriptive analysis, factor analysis, t-test and ANOVA. The results of the study can be summarized as follows: 1. Service Quality in In-flight catering was assessed on the basis of 18 service quality attributes and 5 dimensions derived from a factor analysis. After comparing customers' perception to customers' expectation regarding in-flight service quality, the quality of dimensions for 'meals', and 'sanitation' were not showed any significant differences. However, the expectation for dimensions of 'diversity of menu', 'providing information', and 'the degree of concern to the customers' were rated significantly higher than the perception for those. 2. Among the demographic variables, age and gender had highly influences on the customers' expectation and perception regarding service quality and customer satisfaction. 3. The korean food that the customers wanted to have for in-flight meals was investigated. Among the kinds of gruel(jook), abalone gruel(jeonbok-jook), pumpkin gruel(hobak-jook), and pine-nut gruel(jat-jook) were chosen to have for in-flight korean meals. It was rated that the preferences for beef soup(sogogikook), hot spicy beef soup(youkgaejang), brown sea-weed soup(miyoukkook) were higher than others in soup group. The preferences for boiled rice with assorted mixture(bibimbab) showed the highest and beef and rice soup(seoleongtang), boiled rice with four the staple cereals(ogogbab) were preferred higher than the others in main dish group. Bulgogi was rated the most popular dish. Korean style punch with omiza(whachae), sweet rice dish(yaksik) and fried glutinous rice cake(gangjeong)showed high preferences in dissert.

• 패션비즈니스
• /
• 제18권4호
• /
• pp.168-179
• /
• 2014

Everyone has the desire to be well shaped. Modern people in the $21^{st}$ century utilize their external appearance as a tool to express their personalities and social activities for the improvement of cultural life and the acceleration of information transfer. The expression of beauty is a method of communication from the view point of creation in addition to the exchange of meaning & value, and it has become a method of image transfer due to the increased desire for a better appearance. The beauty industry was established in 1948 by the execution of the 1st hairdresser's license test, and has been developed in full scale through the enactment of the public health control act. Therefore, beauty education is currently qualitatively and quantitatively developed, and the educational role of the beauty institute has expanded to include training beauty professionals. Private beauty institutes provide students with beauty related education in preparation for the national technical qualification examinations or private beauty association tests. These beauty education opportunities enable aspiring beauticians to attend various beauty competition events and acquire a sense of accomplishment. The purpose of this study was to determine how the quality of the beauty educational institutes affects the re-registration rate, and to analyze the effect of the beauty educational institutes quality on the intention of re-registrations using a survey. The study results show that variables such as 'lecture satisfaction', 'internal environment satisfaction', 'facility satisfaction', and 'tuition satisfaction' are significantly related to the rate of re-registrations, with 'lectures satisfaction' especially having the largest influence on re-registration.