• 정보처리학회논문지A
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• 제16A권6호
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• pp.489-500
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• 2009

네트워크 기반 로봇에서 로봇은 한정된 자원을 가지며 서비스에 따라 필요로 하는 입출력 장치와 컴퓨팅 능력 및 응답 실시간성이 다르다. 본 논문에서는 네트워크 기반 로봇에서 로봇이 다양한 서비스를 효율적으로 수행하고 서비스의 실시간성을 제공하도록 하기 위하여 서비스 실 행 컨텍스트를 동적으로 관리하는 방법을 제안한다. 실제 네트워크 기반 로봇에 적용하여 실험한 결과, 제안한 방법은 서비스 실행의 실시간 응답성을 만족하며 로봇의 자원 사용률을 향상시켰다. 제안한 방법은 서비스 실행 컨텍스트에 대한 변경이 용이하므로 센서 및 새로운 서비스 에 대한 확장성과 융통성을 제공하며 로봇 서비스의 재사용성을 증대시킨다.

• 보건의료산업학회지
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• 제10권4호
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• pp.97-107
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• 2016

Objectives : This study aims to : (i) characterize and differentiate between two different periods of baby boomers, (ii) study the utilization of their health care services, and (iii) establish effective ways of providing better health service utilization and preventive policy strategies for upcoming and older generations. Methods : A multiple regression analysis using descriptive statistics, frequency analysis, and dummy variables was utilized to access the presence of correlations between socio-demographic factors and health care service utilization. Results : Medical insurance type, marital status, and chronic disease were factors that influenced health care service utilization. Furthermore, the factors that influenced individual medical expenses were cohabitation, inpatient days, and chronic disease. Conclusions : Primary findings and exploratory statistics revealed that there were strong correlations and interaction among some of the predictor variables. Because of the chronologically limited nature of the sample data set gathered in 2012, it would be helpful to continue to develop or research related constructs that may capture relationships more effectively among extended populations.

• 한국시뮬레이션학회논문지
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• 제13권1호
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• pp.41-50
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• 2004

The purpose of this paper is to analyse the manager's policy to maximize the profit in a multiple-server queueing facility with a limited queue capacity. We assume that the level of advertizing effects on the arrival rate of customers to the facility. The model without ‘word of mouth effect’ is assumed that the arrival rate is independent on the qualify of service level. We estimate the service quality by the balking rate of customers from system. We extend this to the model with ‘word of mouth effect’. To achieve the maximum profit, the most important factor is the considerably high utilization of facility for both models. Given service rate, we should maintain an effective arrival rate to some extent. To this end, among the available options, an increase of advertizing effort is more desirable than reducing the fee if the service value of customers remains unchanged. We also investigate whether the variability of service time has a significant impact on determining the optimal policy. The cost of service variability is not so expensive as that in a single server model due to the reduced variability of service times in a multiple-server model.

• Computers and Concrete
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• 제4권1호
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• pp.1-18
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• 2007

Over the past decades, an enormous amount of effort has been expended in laboratory and field studies on concrete durability estimation. The results of this research are still either widely scattered in the journal literature or mentioned briefly in the standard textbooks. Moreover, the theoretical approaches of deterioration mechanisms with a predictive character are limited to some complicated mathematical models not widespread in practice. A significant step forward could be the development of appropriate software for computer-based estimation of concrete service life, including reliable mathematical models and adequate experimental data. In the present work, the basis for the development of a computer estimation of the concrete service life is presented. After the definition of concrete mix design and structure characteristics, as well as the consideration regarding the environmental conditions where the structure will be found, the concrete service life can be reliably predicted using fundamental mathematical models that simulate the deterioration mechanisms. The prediction is focused on the basic deterioration phenomena of reinforced concrete, such as carbonation and chloride penetration, that initiate the reinforcing bars corrosion. Aspects on concrete strength and the production cost are also considered. Field observations and data collection from existing structures are compared with predictions of service life using the above model. A first attempt to develop a database of service lives of different types of reinforced concrete structure exposed to varying environments is finally included.

• International Journal of Computer Science & Network Security
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• 제23권8호
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• pp.199-203
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• 2023

Influential trend that widely reflected the software engineering industry is service oriented architecture. Vendors are migrating towards cloud environment to benefit their organization. Companies usually offer products and services with a goal to solve problems at customer end. Because customers are more interested in solution of their problem rather than focusing on products or services. In software industry the approach in which customers' problems are solved by providing services is known as software as a service. However, software development life cycle encounters enormous changes when migrating software from product model to service model. Enough research has been done on the overall development process but a limited work has been done on the factors that influence requirements elicitation process. This paper focuses on those changes that influence requirement elicitation process and proposes a systematic methodology for transformation of software from product to service model in a successful manner. The paper then elaborates the benefits that inherently come along with elicitation process in cloud environment. The paper also describes the problems during transformation. The paper concludes that requirement engineering process turn out to be more profitable after transformation of traditional software from product to service model.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.524-526
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• 2022

실시간 멀티미디어 서비스만을 고려하여 QoS를 고려한다면 단말의 수를 조정하여 적절하게 보장할 수 있지만, 본 연구에서는 실시간 멀티미디어 서비스와 일반 데이터 서비스를 고려한 복합적인 서비스를 고려하고 있다. 물리적인 네트워크 자원의 양은 한정되어 있기 때문에, 적절한 CAC가 이루어지지 않는다면 당연히 원하는 QoS의 보장도 이루어질 수 없다. 그러나, 전체 네트워크 자원과 현재 제공중인 서비스의 트래픽 profile과 QoS spec, 그리고 새로이 요청받은 서비스의 트래픽 profile과 QoS spec이 주어졌을 때, 이로부터 새로운 서비스 요청이 수용 가능한지를 정확히 판단하는 것은 상당히 어려운 일이다. 이를 위해서는 수학적 분석으로부터 다양한 시뮬레이션, 그리고 실제 네트워크 운영에서 얻어지는 데이터에 기반한 통계적인 연구에 이르기까지 다양한 방향에서의 연구가 필요할 것으로 보인다.

• 품질경영학회지
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• 제45권1호
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• pp.129-138
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• 2017

Purpose: This research aims to analyze the service process of corporate courier services in order to offer service providers possible directions for adaptation of new technologies and assurance of better quality services. Methods: Through the analysis on the parcel service process of company Y by applying service blueprinting method, the overall process and failure service points of corporate courier services can be recognized and investigated. Next, the several newer technologies, augmented reality glasses, exoskeleton, and drone are applied to the service process of company Y as they are suggested by the literature review and referenced to DHL's report on the Fourth Industrial Revolution. Then, service options to overcome the service failure points to improve the service process can be produced. Results: The parcel service process of the company Y is utilized as a hub-and-spoke structure by having distribution and delivery centers which separates customers into two types, ones using the total services and the others only using the delivery service. In addition, the main cause of the service failures is determined that it is due to the limited working hours of delivery centers compared to the workload. Conclusion: This research contributes in better understanding of corporate courier services and providing information for benchmarking. An empirical research on the costs and the efficiencies of applying the new technologies is suggested for the further improvement in the processes of corporate courier services.

• 한국식생활문화학회지
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• 제23권5호
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• pp.605-615
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• 2008

The principal objective of this study was to categorize service attributes on the basis of the asymmetric and non-linear relationship existing between service attributes and customer satisfaction. Researchers generally assume that service attribute performances and customer satisfaction are both symmetrical and linear. That is to say, improvements in attribute performance will inevitably result in increased customer satisfaction. However, this is not always the case. Certain attributes have been shown not to create satisfaction even when improved, and others do not create dissatisfaction even when their performance ratings become negative. Understanding this relationship is crucial not only to researchers, but also to service managers. Service managers can arrange their priorities with regard to which attributes must be improved or promoted first, in an environment of limited technical, financial, and human resources. Many studies into this asymmetric and non-linear relationship have recently been conducted, beginning with Herzberg's motivation-hygiene theory (1976) and the disconfirmation theory, which was eventually developed into Kano's model (1984). This study attempted to determine the impact level of service attributes on incidents of satisfaction or dissatisfaction. It used 30 service attributes generated by Park (2008) in the CIT research into family restaurants. The data were collected from 600 participants, 300 incidences of satisfaction and 300 incidents of dissatisfaction, via an online survey. The t-test was used to confirm the difference between the satisfaction group's and dissatisfaction group's attributes. 11 attributes were found to be significant at a level of p>0.05. This indicates that the 11 attributes exerted different impacts on satisfaction and dissatisfaction, which confirmed the asymmetric and non-linear relationship. 14 attributes were categorized into the core service, 1 attribute into the quality service, 7 attributes into the basic service, and 8 attributes into the neutral service. Strategic customer service management was recommended for the 'A' family restaurant as an example, on the basis of the asymmetric and non-linear relationship and the characteristics of the four service factors.

• 한국경영과학회지
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• 제33권2호
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• pp.45-73
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• 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.

• 한국항행학회논문지
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• 제12권4호
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• pp.317-323
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• 2008

인터넷과 무선통신의 기술은 무선인터넷 서비스로 발전하고 있다. 휴대폰은 저용량의 메모리, 작은 스크린과 성능 등 여러 제한점이 있지만, 이동성과 시공간을 추월한 정보접근의 유리한 점을 가지고 있다. 본 논문에서는 기존의 유선인터넷에서만 이루어지던 온라인 학습을 휴대폰에서 가능하도록 학습시스템을 설계하고 구현한다. 대행업체를 통한 SMS 전송방식은 SMS 대행업체와 네트워크로 구성이 되어야 하나, SMS 전용모뎀 전송방식은 일반 PC와의 연결만으로 시스템 구축이 가능하다. 본 논문은 SMS 전용모뎀을 통하여 SMS Service가 가능하도록 시스템을 구성하고, DB를 제공하여 사용자의 다양한 요구를 반영할 수 있도록 구성하였다.