• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.1
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• pp.1-5
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• 2016

The all-in-one service, for example, mobile wallet enables users to have credit card, membership card, and coupon in one place. It has been one of important o2o services with offline payment. In order to take advantage of mobile commerce, it is necessary to authenticate clients automatically without entering their passwords. This paper proposes an automatic client authentication method in all-in-one service. At registration, clients receives and stores an authentication ticket from a company, which contains an user's identifier and password encrypted by company's symmetric key. Client can be authenticated by transferring authentication tickets to companies at service requests.

• Journal of Information Processing Systems
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• v.3 no.2
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• pp.82-88
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• 2007

Web services are the new building block of today's Internet, and provides interoperability among heterogeneous distributed systems. Recently in web services environment, security has become one of the most critical issues. The hackers attack one of fragile point and can misuse legitimate user privilege because all of the connected devices provide services for the user control and monitoring in real time. Also, the users of web services must temporarily delegate some or all of their rights to agents in order to perform actions on their behalf. This fact risks the exposure of user privacy information. In this paper, we propose secure delegation model based on SAML that provides confidentiality and integrity about the user information in distributed systems. In order to support privacy protection, service confidentiality, and assertion integrity, encryption and a digital signature mechanism is deployed. We build web service management server based on XACML, in order to manage services and policies of web service providers.

• Journal of Ecology and Environment
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• v.43 no.1
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• pp.61-72
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• 2019

Background: Organic carbon stored in coastal wetlands, which comprises the major part of oceanic "blue carbon," is a subject of growing interest and concern. In this study, organic carbon storage in coastal wetlands and its economic value were estimated using the raw data of 25 studies related to soil carbon storage. Data were collected from three tidal flats (one protected and two developed areas) and two estuarine salt marshes (one protected and one restored area). Bulk density, soil organic matter content, and standing biomass of vegetation were all considered, with Monte Carlo simulation applied to estimate the uncertainty. Results: Mean carbon storage in two salt marshes ranged between 14.6 and $25.5kg\;C\;m^{-2}$. Mean carbon storage in tidal flats ranged from 18.2 to $28.6kg\;C\;m^{-2}$, with variability possibly related to soil texture. The economic value of stored carbon was estimated by comparison with the price of carbon in the emission trading market. The value of US $ $6600\;ha^{-1}$ is ~ 45% of previously estimated ecosystem services from fishery production and water purification functions in coastal areas. Conclusions: Although our study sites do not cover all types of large marine ecosystem, this study highlights the substantial contribution of coastal wetlands as carbon sinks and the importance of conserving these habitats to maximize their ecosystem services.

• Health Policy and Management
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• v.11 no.3
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• pp.31-45
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• 2001

With an economic development and epidemiologic transition, the burden of disease due to chronic diseases and accidents is increasing. However, in most of developing countries, long-term care facilities are not available, therefore acute care facilities should provide both acute and long-term care services. It is also true in Korea. The demand for long-term care services needs to be estimated to establish the adequate supply system of health resources. This article introduces the reclassification methodology of inpatients' healthcare utilization to acute and long-term care services. All discharged patients from hospitals for one month were analyzed. The distribution of inpatients' hospital days were fitted to Chi-squared distribution by ICD disease categories, and they were grouped in five clusters. For each cluster, the lower and upper limit of classification criteria to acute and long-term care services were chosen. Summarizing all hospital days corresponding to acute and long-term care respectively, 24 to 28 percent of inpatient services fumed out to be long-term care services. The study results are consistent with those of the existing studies. They can be used practically in the allocation of long-term care resources.

• The Korean Journal of Health Service Management
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• v.13 no.4
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• pp.95-107
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• 2019

Objectives: The purpose of this study was to examine the quality and reputation of medical services in hospitals run by Gangwon-do 1,3, and 10 dentists, to investigate the mitigation effects of trust and quality on patient satisfaction and loyalty. Methods: Of the 600 surveys collected, 578 were used. Results: Although there were differences in dental services by type of institution, fame influenced patient satisfaction in all three institutions, and patient satisfaction also affected loyalty in all three institutions. The moderating effect of trust was shown to one dentist, and physician trust was shown to have a moderating effect. Conclusions: The establishment of reputation trust and the practice of dental medical services are important for attracting patients.

• Journal of Information Technology Services
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• v.7 no.2
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• pp.77-93
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• 2008

According to the statistics revealed by Bank of Korea on March, 2007, Internet banking transactions outnumbered face-to-face banking services in Korea. Internet banking is becoming essential in every financial service sectors. For people with disabilities, Internet banking is more meaningful because they do not need to visit the bank, thereby saving inconvenient trips. Governments in many countries are working on setting standards and laws on the web accessibility for people with disabilities. Korea government enacted Korea Disability Discrimination Act in 2007. This paper examined the web accessibility compliance of Internet banking sites. Twenty one Internet banking sites were selected from the list in the Korea Federation of Banks's Web sites. We examined four major checkpoints that are considered crucial among the fourteen checkpoints in "Internet Web Contents Accessibility Guidelines" which was amended by Ministry of the information and Communication in 2005. The results showed that all of the twenty one Internet banking sites didn't meet the four major checkpoint requirements. Moreover, only one banking site satisfied alt-text requirement that is considered the most fundamental among the checkpoints.

• Journal of Advanced Marine Engineering and Technology
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• v.27 no.1
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• pp.65-75
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• 2003

The internet telephony service is one of the successful internet application services. VoIP is the key technology for the service to come true. VoIP uses H.323 or SIP as the standard protocol for the distributed multimedia services over the internet environment, in which QoS is not guaranteed. VoIP carries the packetized voice by using the RTP/UDP/IP protocol stack. The UDP-based internet services cause the data transmission problem to the users behind the internet firewall. So does the internet telephony service. The users are not able to listen the voices of the counter-parts on the public internet or PSTN. It makes the problem more difficult that the internet telephony service addressed in this paper uses only one UDP port number to send the voice data of all sessions from gateway to terminal node. In this paper, two schemes including the usage of dummy UDP datagrams, and the protocol conversion are suggested. The implementation of one of the schemes, the protocol conversion, and the performance evaluation are described in detail.

• ETRI Journal
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• v.15 no.2
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• pp.53-68
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• 1993

The field of marketing research in the satellite communication services is still in the early stage of its development. Particularly, in Korean domestic satellite service market, many theoretical and methodological opportunities now exist. In this paper we develop a model, which identifies target markets and promising application services in Korean satellite communication service Market. One key contribution of this paper is a modeling approach to the assessment of market potential and priorities of the application services in each Korean industry. We define and estimate the degree of attractiveness for each segmented market which represents the market potential estimated by current usage of terrestrial services and each market segment's willingness to adopt satellite technology. Since all possible satellite application services are not equally important in the market, they should be differentiated in terms of the likelihood of success. We introduce another index prioritizing application services by tying together three important factors affecting Korean satellite service demand. Some marketing implications of model results are also discussed. Finally the findings of our model are compared with those of other similar studies.

• Journal of Society of Preventive Korean Medicine
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• v.15 no.3
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• pp.115-125
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• 2011

Objectives : The aim of this study is to investigate the relevant factors which determine the use of oriental healthcare services among subjects with chronic illnesses. Method : This study utilized the data from the Korean National Health and Nutrition Examination Survey in 2005. Out of all the participants of the survey, 11,665 individuals who are older than 19 years old and have one or more chronic diseases were included in this study. Results : The factors that affect utilization of oriental healthcare services were significantly associated with gender, educational level, job, personal income, the number of chronic illnesses, experiences of nontreatment or delayed treatment and admission experiences for the last one year(p<.001). Although some of these factors need further studies, the determining factors for the use of oriental healthcare services are the presence of chronic illness and the number of chronic disease. That is, the chronically ill are more likely to seek oriental healthcare services. And the more chronic diseases the clients have the higher probability of seeking oriental healthcare services was found. Conclusions : The results suggest that the national integrated care services should be established for diverse development of policy regarding the quality of care of chronic illness and cost-effectiveness.

• IEMEK Journal of Embedded Systems and Applications
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• v.3 no.4
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• pp.198-206
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• 2008

Internet protocol television (IPTV), one of the most emerging services, offers multimedia streaming services with security, reliability, and relevant quality of service (QoS)/quality of experience (QoE). It provides added values to all the involving players and also brings technical and business challenges to them. For IPTV services, we expect to adopt the next generation network (NGN) environment for high quality and the Web technologies for personalization to meet the customer's necessity. Web can provide an open, flexible, and agile platform. Therefore, in this paper, we propose personalized IPTV services based on Web-based open platform in NGN environment and present functional architecture for Web-based personalized IPTV services. Technical issues for deploying the proposed IPTV services using Web are also provided. The objective of this paper is to analyze the critical architectural issues for developing viable and feasible networking platform models for personalized IPTV services.