• ETRI Journal
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• v.37 no.2
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• pp.417-427
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• 2015

With recent advances in media technology, the creation of a relatively new service, N-screen, has been realized. N-screen provides seamless connections among various media and enables users to enjoy entertainment content at any time and any location. With such recent advances comes opportunity; therefore, for those N-screen service providers who have established an early edge in the ICT industry, it is imperative that they maintain this and stay ahead of the ensuing competition. In this context, the objective of this study is two-fold; first, we aim to find factors influencing the behavior of existing and potential N-screen service users, and then second, to examine the differences in how these factors operate within the two user types. The results of this study show that the perceived value and subjective norm are important influencers in both user types. However, price fairness and innovativeness are only influential on the attitude and intention of potential users, while some aspects of media usage have only significant influences on the behavior and loyalty of existing users. Based on these results, we provide some implications for both researchers and practitioners who wish to better understand the nature of N-screen users.

• Journal of the Earthquake Engineering Society of Korea
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• v.18 no.3
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• pp.151-160
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• 2014

Probabilistic tsunami hazard analysis (PTHA) is based on the approach of probabilistic seismic hazard analysis (PSHA) which is performed using various seismotectonic models and ground-motion prediction equations. The major difference between PTHA and PSHA is that PTHA requires the wave parameters of tsunami. The wave parameters can be estimated from tsunami propagation analysis. Therefore, a tsunami simulation analysis was conducted for the purpose of evaluating the wave parameters required for the PTHA of Uljin nuclear power plant (NPP) site. The tsunamigenic fault sources in the western part of Japan were chosen for the analysis. The wave heights for 80 rupture scenarios were numerically simulated. The synthetic tsunami waveforms were obtained around the Uljin NPP site. The results show that the wave heights are closely related with the location of the fault sources and the associated potential earthquake magnitudes. These wave parameters can be used as input data for the future PTHA study of the Uljin NPP site.

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.16
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• pp.7195-7200
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• 2015

Background: Since seventeen employees of an offset printing company in Osaka, Japan developed cholangiocarcinoma it has become recognized as an occupational cancer. This study investigated the differences of clinical features between occupational cholangiocarcinoma and sporadic young-onset cholangiocarcinoma. Materials and Methods: Thirty-four young adults (<50 years old) with sporadic cholangiocarcinoma were extracted from the Rosai Hospital Group database (sporadic group) and their clinical features were compared with those of 17 patients with occupational cholangiocarcinoma (occupational group). Results: The 34 patients in the sporadic group were treated for cholangiocarcinoma at 16 different Rosai hospitals. There were significant differences of age (p<0.01), gender (p<0.01), abnormal laboratory tests (p<0.01), and tumor location (p<0.01) between the two groups. The percentage of patients with abnormal laboratory tests was significantly higher in the occupational group than in the sporadic group (p<0.001). Regional dilation of bile ducts, which is a characteristic of occupational cholangiocarcinoma, was not observed in the sporadic group. Conclusions: No cluster of cholangiocarcinoma cases was identified in the Rosai Hospital database. There were differences of clinical features between occupational and sporadic cholangiocarcinoma, which might be helpful for diagnosing occupational cholangiocarcinoma in the future.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.5
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• pp.1014-1035
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• 2013

With recent advances in wireless communication and low-power miniaturized biomedical sensor and semiconductor technologies, wireless body area networks (WBAN) has become an integral part of the disaster aid system. Wearable vital sign sensors can track patients' status and location, thus enhancing disaster rescue efficiency. In the past few years, most of the literatures in the area of disaster aid system based on WBAN have focused on issues concerning wireless sensor design, sensor miniaturization, energy efficiency and communication protocols. In this paper, we will give an overview of disaster aid, discuss about the types of network communication as well as outline related issues. We will emphasize on analyzing six key issues in employing the disaster aid system. Finally, we will also highlight some of the challenges that still need to be addressed in the future in order to help the disaster aid system be truly and widely accepted by the public.

• Journal of Computing Science and Engineering
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• v.11 no.2
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• pp.49-57
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• 2017

This paper proposes a new IPv6 networking paradigm as a counter answer to the rationale for locator/identifier separation. Instead of involving separate number spaces each for node identifiers and locators, the context of the IP address as a node identifier alone is utilized and no additional locators are incorporated. That is, there are only node addresses and no locators, and location information is indirectly derived from neighbor relations between nodes. In order to accomplish this, no subnet IDs are utilized; the ID value is set to zero for all subnets. The paper details how to construct this paradigm through novel choice of operational policies in various IPv6 protocols and some trivial modifications. Especially, inherent provision of intra-domain node- as well as subnet-mobility by use of standard link-state intra-domain routing protocols is discussed. A number of important advantages of this paradigm over the canonical IPv6 networking and various known solutions of locator/identifier separation are discussed. Tailoring for multi-area domains and IPv4 is left for further study.

• Journal of the Korea Society of Computer and Information
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• v.22 no.2
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• pp.89-95
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• 2017

There are a variety of apps that are finding their way. And in car navigation, we launched a product that reflects Augmented Reality technology this year. However, existing apps have problems. It is implemented in 2D or 3D, has a large error range because it has been modified in most vehicles, is not updated in real time, and car augmented reality navigation is a vehicle, and a separate device is required, etc. In this study, we implemented a smartphone app for walking directions using augmented reality, and made it possible to intuitively use a route service from a user 's location to a destination. The Dijkstra algorithm is applied to calculate the shortest path to solve the problem of finding the route with the least cost. By using this application, it is possible to use the route search service even in a data-free environment, to solve the inconvenience of the language barrier, and to update in real time, so that the latest information can be always maintained. In the future, we want to develop an app that can be commercialized by using a character in the path to promote it.

• Journal of The Korea Institute of Healthcare Architecture
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• v.24 no.1
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• pp.15-24
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• 2018

Purpose: The research looks at differences between the 'General ward' and the 'Comprehensive nursing ward' in Seoul Medical Center, regarding the facility improvements and changes in nursing services. It investigates and analyzes spatial problems and improvement needs through a survey and conduct investigation of staffs. It is to propose the primary data for the architectural planning of the future ward with the comprehensive nursing service. Methods: Targeting the comprehensive nursing ward, changes of the physical environment and spatial problems are analyzed through a field survey, behavior investigation, present-condition investigation, and floor plan analysis. Results: The workforce is increased by approximately twice the amount of the nursing staffs in the comprehensive nursing ward, compared to the pre-general ward. When utilizing the general ward, various spatial problems arise due to the restrictions of the facility condition. Because Sub N.S is an important facility as a part of the nursing work function in the ward of the comprehensive nursing service, the opinions of staffs must be considered when selecting a location and composing a space. Implications: It can be used as a primary data for the comprehensive nursing ward when architectural planning of a new hospital.

• Journal of Industrial Technology
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• v.22 no.A
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• pp.127-135
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• 2002

In this study, the preliminary risk assessment for the underground storage tanks(UST) in Chunchon city was implemented using the geographical information system(GIS). The estimation variables, such as the installation year, storage capacity, the distances from streams, and from groundwater pumping wells, were selected to estimate the relative risk levels. The weighting factors were given to all the estimation variables. Cumulative scores were induced by the combination of all the scores of the corresponding variables using the buffering technique and the overlay analysis in ArcView. Using the these process, the relative risk level of each UST was estimated. Some sites in this study are simplified and reduced because the number of useable data are limited or too enormous. Thus the selection of the comprehensive estimation variables and the proper weighting values are required for the future study. The methodology in this study could be served not only for the preliminary risk assessment of UST but also for the selection of the proper location of new and old UST. And, it can be used for the effective management system of UST.

• The Journal of Korean Physical Therapy
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• v.30 no.4
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• pp.151-157
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• 2018

Purpose: This study was conducted to identify the characteristics of physical therapy service utilization and user satisfaction depending on the experience with therapeutic exercise or ultrasound intervention among elderly persons using senior centers. Methods: The subjects were adults aged over 60 years (total 215) recruited in 40 senior centers located in each province in South Korea. Subjects responded to questions concerning overall demographics factors, utilized characteristics of physical therapy service and 12 variety user satisfactions with effectiveness, facilities, and therapist using a survey instrument. The collected data were analyzed by Fishers' exact tests and t-tests using the SPSS 21.0 program to compare the results of elderly persons who had or had not experienced exercise therapy or ultrasound therapy. Results: The participants that experienced ultrasound therapy or therapeutic exercise reported significantly higher overall results pertaining to effectiveness of physical therapy and a clear explanation from physical therapist's satisfaction than those who were non-experienced. Satisfaction with pain relief was significantly higher among elderly who experienced therapeutic exercise than those who did not. Those who underwent ultrasound therapy showed significantly higher satisfaction with facilities and location than those who did not. Conclusion: The results of this study suggest that satisfaction among users differs by type of physical therapy. In the future, physiotherapy services provided in senior centers needs to be designed to improve the effectiveness of physical therapy, professionalism of physical therapists and comfort of facility.

• Journal of Families and Better Life
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• v.23 no.5 s.77
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• pp.181-190
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• 2005

The purpose of this study was to investigate the characteristics of leisure behavior of the five-day workweek company employees for developing leisure facilities in residential environment. The questionnaire survey was used. The subjects of questionnaire survey were 247 staffs of 4 banks. The questionnaire consisted of leisure time, the cost of leisure, consciousness of leisure, actual condition and need of leisure activities and spaces, leisure satisfaction and limitation on leisure. Frequency, percentage, and mean, correlation, $x^2-test$, and factor analysis were used for data analysis. The major results were as follows. 1) Leisure is necessary to strengthen the unity of family and cultivate the sentiment. 2) The degree of satisfaction of leisure facilities was lower than neutral. The satisfaction of leisure facilities related with cost, time of leisure, information of leisure facilities and program, and leisure environment. 3) Present leisure behavioral characteristics were restrictive and passive. However, the subjects showed hopes to increase their leisure activities and to engage in diverse forms of leisure in the future. Also, they showed an increased desired ratios in participating in each leisure activities. 4) In terms of location, they needed leisure facilities which was closer to their house.