• 방송공학회논문지
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• 제13권4호
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• pp.528-543
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• 2008

Internet Protocol Television (IPTV)는 방송 통신 융합 서비스 실현을 위한 대화형의 개인 맞춤형 멀티미디어 서비스이다. TV에 연결되는 IPTV Set-Top Box (STB)는 사용자의 유일한(unique) 하드웨어 식별자로서 가입자 인증에 사용된다. 이것은 box-level의 식별방법으로 가족 구성원이 하나의 IPTV 서비스를 공유한다는 점에서 개인 맞춤형 서비스를 지향하는 IPTV의 목적에 적합하지 않다. 본 논문에서는 기존의 STB에 3G 이동통신의 오픈 플랫폼 자바카드를 기반으로 한 사용자 개인정보를 저장할 수 있는 IDENTITY 애플릿을 정의하여 3G 네트워크와 IPTV 응용서버 사이에 사용자 중심의 인증과 개인 맞춤형 서비스가 가능한 IPTV 인증 프로토콜을 제안하고, 이에 대한 효율성과 안전성에 대해 검증한다.

• 경영정보학연구
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• 제23권4호
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• pp.87-102
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• 2021

스마트시티는 에너지 소비 급증과 환경오염 심화, 범죄율 증가와 같은 도시화의 부작용을 해결하기 위한 수단과 신기술 기반의 새로운 경제성장 동력으로 주목받고 있다. 특히, 코로나19로 인해 비대면 서비스에 대한 수요가 증가하면서 각종 온/오프라인 비대면 서비스를 제공할 수 있는 스마트시티의 역할은 더욱 중요해지고 있다. 이에 본 연구는 스마트시티의 개념과 기반 기술에 대한 문헌 연구를 바탕으로 스마트시티 비대면 서비스를 정의하고, 컨조인트 분석을 이용해 각 서비스 별 소비자 효용을 분석하였다. 특히, 현재 우리나라의 국가 스마트시티 시범도시로 지정된 세종시와 부산시의 이용자 선호도 차이를 비교·분석하였고, 도출된 결과를 바탕으로 스마트시티 서비스의 경쟁력 제고 방안을 제시하였다.

• 유통과학연구
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• 제15권9호
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• pp.37-52
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• 2017

Purpose - This study explores the influence of franchisors' supports on franchisees financial performance, overall satisfaction and intention to remain. Research design, data, and methodology - Given the exploratory design of the investigation, purposive sampling technique was used to select twenty-six (26) franchisees as key informants for this study. In-depth face-to-face interviews were conducted leading to generation of rich qualitative data on the phenomenon of support services in the Nigeria franchise system. Results - Results indicate that at both the initial and growing stages, training and management service supports have marked influence on franchisees business outcomes. However, findings revealed that at the initial stage, the impact of training is greatest but this impact subsequently declines as franchisees master the nuances of the business. Management services on the other hand maintains a constant relevance through all stages of franchisees business. Conclusions - Three key conclusions were drawn from the findings of this study. First, the quality of initial and ongoing supports have consequences for the long-term health of franchisees and franchisors' businesses. Second, poor management of franchisees' expectations and perception of supports could damage franchise partnerships. Third, franchisees form their expectation of supports largely from the nature of initial supports provided by the franchisors.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권10호
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• pp.1814-1829
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• 2011

In this paper, we present a model-based video bit rate estimation scheme for reducing the bit rate while maintaining a given target quality in many video streaming services limited by network bandwidth, such as IPTV services. Each item of video content can be stored on a video streaming server and delivered with the estimated bit rate using the proposed scheme, which consists of the following two steps: 1) In the first step, the complexity of each intra-frame in a given item of video content is computed as a frame feature to extract a group of candidate frames with a lot of bits. 2) In the second step, the bit rate of the video content is determined by applying statistical analysis and hypothesis testing to that group. The experimental results show that our scheme can reduce the bit rate by up to 78% with negligible degradation of subjective quality, especially with the low-complexity videos commonly used in IPTV services.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.387-390
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• 2004

In this paper, we design and implement practical application service using VoiceXML. And we suggest new solutions of problems can be occurred when implementing a new systems using VoiceXML, based on the fact. Up to now, speech related services were developed using API (Application Program Interface) and programming languages, which methods depend on system architectures. It thus appears that reuse of contents and resource was very difficult. To solve these problems, nowadays, companies develop their applications using VoiceXML. Advantages of using VoiceXML when developing services are as follows. First, we can use web developing technologies and technologies for transmitting web contents. And, we can save labors for low level programming like C language or Assembler language. And we can save labors for managing resources, too. As the result of these advantages, we can reduce developing hours of applications services and we can solve problem of compatibility between systems. But, there's poor grip of actual problems can be occurred when implementing their own services using VoiceXML. To overcome these problems, we implemented interactive stock trading system using VoiceXML and concentrated our effort to find out problems when using VoiceXML. And then, we proposed solutions to these problems and analyzed strong points and weak points of suggested system.

• The Journal of Asian Finance, Economics and Business
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• 제9권10호
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• pp.189-200
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• 2022

The gig economy offers many advantages, such as flexibility, variety, independence, and lower cost. However, there are also safety concerns, lack of regulations, uncertainty, and unsatisfactory services, causing people to voice their opinion on social media. This paper aims to explore the sentiments of consumers concerning gig economy services (Grab, Foodpanda and Airbnb) through the analysis of social media. First, Vader Lexicon was used to classify the comments into positive, negative, and neutral sentiments. Then, the comments were further classified into three machine learning algorithms: Support Vector Machine, Light Gradient Boosted Machine, and Logistic Regression. Results suggested that gig economy services in Malaysia received more positive sentiments (52%) than negative sentiments (19%) and neutral sentiments (29%). Based on the three algorithms used in this research, LGBM has been the best model with the highest accuracy of 85%, while SVM has 84% and LR 82%. The results of this study proved the power of text mining and sentiment analysis in extracting business value and providing insight to businesses. Additionally, it aids gig managers and service providers in understanding clients' sentiments about their goods and services and making necessary adjustments to optimize satisfaction.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.79-90
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• 2021

The purpose of this research is to identify factors affecting the acceptance and use of e-tax services among medium taxpayers in Phnom Penh, Cambodia. The researcher conducted the study based on a quantitative approach by using multi-stage sampling method, which selects a sample size by two or more stages. The first stage sampling was the stratified random sampling and the subsequent stage was purposive sampling. In this study, the stratified random sampling was first used, followed by purposive sampling. The data were collected from 450 medium taxpayers who experienced using e-tax services located in three tax branches in Phnom Penh. This study adapted the confirmatory factor analysis (CFA) and structural equation model (SEM) to analyze the model accuracy, reliability and influence of various variables. The primary result showed that behavioral intention has a significant effect on user behavior of e-tax services among medium taxpayers in Phnom Penh, Cambodia. Moreover, the results revealed that performance expectancy, effort expectancy, social influence, and anxiety have significant impact on behavioral intention. In addition, social influence has the strongest impact on behavioral intention, followed by anxiety, performance expectancy and effort expectancy. Conversely, facilitating conditions, trust in government, and trust in internet do not influence behavioral intention.

• 한국환경복원기술학회지
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• 제21권1호
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• pp.31-40
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• 2018

Since the Millennium Ecosystem Assessment Report was published in 2005, the conflict between development and the preservation of the ecological environment has turned to paying attention to value assessments in rational decision-making. In recent years, the concept of ecosystem services has been recognized as a viable one for making significant decisions. However, a trade-off between increase and decrease occurs between the ecosystem services sub-categories (cultural service, regulating service, supporting service, and provisioning service), for which research centering on target sites is needed. To this end, the present study aims to investigate the trade-off relationship between service categories to search for reasonable decision-making strategies. As the research method, a survey was conducted using the translated version of SoIVES(Social Value for Ecosystem Services) 3.0 questionnaire of the United States Geological Survey. The research findings demonstrate the economic value, based on the derived monetary value of each service category, the economic value of the target site was compared among landscape aesthetic value 8,050,000 won, recreation value 6,750,000 won, biodiversity value 4,610,000 won, healing value 3,970,000 won, life-sustaining value 2,090,000 won, and productive value 220,000 won. And then the primarily recognized value criteria of the Tancheon ecosystem services illustrate landscape aesthetic and recreation value. Besides, this study illustrates visualized trade-off relationships based on user perception, and the derived relations illustrate the trade-off relationship between the cultural service, regulating service, supporting service, and provisioning service, as well as relationships between the components of the sub-categories.

• 가정∙방문간호학회지
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• 제21권2호
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• pp.127-138
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• 2014

Purpose: The objectives of this study were to analyze the state of hospital-based home care (HC) services annually and to provide basic information for research and policy regarding home care. Methods: This study is a secondary analysis of the yearly state of HC services from the Health Insurance Review & Assessment Services from 2007 to 2012. Results: The decreased by 34.6%, from 214 agencies in 2007 to 140 in 2012. The annual average number of active home care nurses was 440, which included 6.7% of the licensed home care nurses until 2012. The annual average number of HC patients were 32,000, and this number decreased by 21% in 2012, compared to that of 2008. Of the HC patients, about 70% were over 60 years of age. The chronic diseases among HC patients have been decreasing steadily since 2007. Seventy to eighty percent of the home visits were made in general hospitals or higher level hospitals. The total medical cost for HC services was 21 billion won in 2007, which consisted of 0.06% of the national medical costs, and it was 22 billion won and 0.03% in 2012. Conclusion: Based on the results of this study, further research on HC services is necessary to frame policies for the expansion of HC agencies.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.510-516
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• 2008

In ubiquitous environment, there are no limits to utilize networks whenever and wherever you are. That pervasive networks are combined with the information devices and then create various services such as car navigation of LBS(location based service) and DMB(Digital Multimedia Broadcasting). As these kinds of services are getting more various, the complexity is also getting higher and ultimately the convergence will make people feel frustrated. One of the solutions is Context-Awareness[1] technology. User interface with context-awareness filters unnecessary information and prevents users from being blocked due to the massive information. In this paper, we describe the seamless service system based on location-awareness, which is a type of context-awareness. We developed the system based on UPnP AV Framework. This system provides the automatic terminal device selection for the nomadic user. The system establishes new connections for the ongoing streaming playback session with the new AV devices without substantial loss of playback so that the user can enjoy the seamless service. The AV device selection based on the user's location needs no user's intervention or notification so it achieves the improvement of usability and complexity.