• Proceedings of the Korean Operations and Management Science Society Conference
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• 2007.11a
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• pp.190-194
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• 2007

In most countries, mobile subscribers are already experiencing 3G-like services. At the moment of launching 3G services, lots of studies showed estimates of the number of subscribers for 3G services, using long-term demand curves, econometric methods or survey methodologies. Those studies mainly focused on the potential number of subscribers and the point of rapid growth rather than precise estimates for the services. Even though we've already experienced parts of 3G services, full length of 3G services are expecting in near future. Therefore, now we need to have more accurate estimates for 3G services. While we thought that 3G services were moved from 2G, in real place 3G services are being evolved from 2G services. In the process of evolving, regulators' policy affects service demand and diffusion significantly. For the more accurate estimates, we need to consider policy issues which influence service diffusion practically in real place. This study aims to present a model which shows better estimates for 3G services with consideration on policy issues, such as numbering issues, price regulation, and competition policy. The consideration can provide more accurate estimates for 3G services with service providers. The methodology could help academicians In forecasting of similar telecommunications services as well.

• Journal of Korean Society of Rural Planning
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• v.14 no.3
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• pp.27-36
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• 2008

Rapid increase of aging population and progressed migration from rural areas to urban areas have caused deficit of bus routes in local cities. This increasing burden of operation deficit affects the movement strategy of the transportation vulnerable who are using buses. Along with dramatically increased aging in Korea, there is an urgent need to implement a new method which can guarantee mobility rights of public transportation especially for the elderly. This study focuses on the case of Demand Responsive Transit(DRT) system that has been operating in America, Europe, Japan, etc. Kimhae(Sangdong-myeon and Saengnim-myeon) is selected as a study area. This study investigated the possibility of adopting DRT system on the perspectives of the consumer and provider by the analysis of traffic condition such as the number of transportation vehicles, present bus service and regulation and conduct of questionnaire survey which includes present bus service and DRT system and so on. In conclusion, DRT system in Kimhae city will reduce transport cost, increase affordability through the betterment of service level and secure mobility rights for the transportation vulnerable.

• Korean Journal of Environmental Agriculture
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• v.35 no.2
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• pp.148-151
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• 2016

BACKGROUND: There are few studies on the impacts of hydrophytes on water quality, so there is a need to research the effects of death of hydrophytes on the worsening of water quality. This study aimed to monitor the effects of Trapa japonica death on reservoir water quality.METHODS AND RESULTS: T.japonica shows the life cycle that highest growth in summer and rapid death in fall decomposing their body in general. T.japonica contains comparatively large portion of nutrients and minerals. Through the field survey using Mesocosm to identify the effects of excessive population of T.japonica on water quality, the water quality of plots planted T.japonica is gradually worse compared with the control plot. And the result of Wilcoxon-test also shows that the negative effect of T.japonica on water quality with significant (p<0.05).CONCLUSION: It is necessary to control the population growth of T.japonica in order to prevention of water pollution in fall.

• Health Policy and Management
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• v.20 no.1
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• pp.155-182
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• 2010

This study reviews 302 articles on health care organizations (HCOs) from 33 Korean Research Foundation registered journals. Articles are classified by criteria, focusing on study topics and methods. Key findings: (1) 'health care' journals are the major source of research on HCOs, (2) there has been a rapid increase in the amount of articles since the 1990s, (3) the majority of the studies deals with micro issues such as job attitude or motivation, (4) approximately 17% of the articles does not provide hypotheses based on theoretical assumptions, (5) few studies attempt to propose a new concept or theoretical framework, (6) most of the studies consider 'individual' as a level of analysis, (7) the use of cross-sectional data collected by survey questionnaire is general, and (8) individuals in a single occupation from multiple organizations are the main data source. Based on the findings, some directions for future research are proposed. Most of all, having more opportunities to introduce theories of organization and organizational behavior in health care need to be made in order to enhance understanding of HCOs. Next, sophisticated methodologies to guide empirical investigations should be developed to reduce deficiencies in research. Finally, efforts to encourage interdisciplinary approaches to the study on HCOs also need to be increased.

• Journal of Korean Library and Information Science Society
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• v.38 no.2
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• pp.223-244
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• 2007

With the rapid and broad changes of information ecology, the environment within which cataloging principles and standards operate has changed dramatically. As a result, IFLA study groups developed Functional Requirements for Bibliographic Records(FRBR) model which is a conceptual model for bibliographic universe. This study intends to make a comprehensive inquiry about historical meanings and functional features of FRBR model. To the end, a comprehensive literature survey and analysis was conducted to introduce how hot and serious the discussion on this model in library cataloging. In conclusion, this study made several suggestions on the role of academic and library world (or applications of this model in Korea Library circumstance.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.3
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• pp.1081-1083
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• 2014

Malignancy-associated mortality, decreased productivity, and spiritual, social and physical burden in cancer patients and their families impose heavy costs on communities. Therefore cancer prevention, early detection, rapid diagnosis and timely treatment are very important. Use of modern methods based on information technology in cancer can improve patient survival and increase patient and health care provider satisfaction. Robot technology is used in different areas of health care and applications in surgery have emerged affecting the cancer treatment domain. Computerized and robotic devices can offer enhanced dexterity by tremor abolition, motion scaling, high quality 3D vision for surgeons and decreased blood loss, significant reduction in narcotic use, and reduced hospital stay for patients. However, there are many challenges like lack of surgical community support, large size, high costs and absence of tactile and haptic feedback. A comprehensive view to identify all factors in different aspects such as technical, legal and ethical items that prevent robotic surgery adoption is thus very necessary. Also evidence must be presented to surgeons to achieve appropriate support from physicians. The aim of this review article is to survey applications, opportunities and barriers to this advanced technology in patients and surgeons as an approach to improve cancer care.

• The Journal of the Acoustical Society of Korea
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• v.21 no.2
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• pp.142-149
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• 2002

With rapid industrial development, a railway has become a main traffic means. But, the railway noise has caused much annoyance for the residents living nearby railway tracks. Therefore, execute regulation standard of railway noise has established for quite dwelling environment from January 2000. However efficient soundproofing measures are very difficult because of the lack of basic data and insufficiency of the existing research. In this point, this study attempts to survey the characteristics of attenuation and propagation of railway noise. And this study intends to get the basic data for establishment of a standard for domestic railway noise.

• Journal of Distribution Science
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• v.18 no.1
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• pp.27-34
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• 2020

Purpose : In the aviation industry, we will investigate the impact of users' acceptance of technology on their usage behavior and find out the factors that affect their acceptance of technology. We will expand the prior study to find out the impact of the self-service technology of Incheon Airport. Research design, data and methodology : Within the last six months, the survey was conducted on people using self-service technology at Incheon International Airport from July to August 2019. Part 307 of the valid questionnaires were used for this final analysis. The collected data were used to perform frequency, factor, reliability, and multiple regression analyses using the SPSS statistical package. Results : Individual aspects of external variables, service aspects and system aspects have been shown to affect usefulness and perceived ease of use. Also, perceived ease-of-use and usefulness have effects on users' intention to accept technology. Conclusions : The perceived easement and perceived usefulness of Incheon International Airport has been shown to affect self-service users. Increasing the user's self-efficiency and increasing the user's expectations for benefits, convenience, rapid processing, and minimal effort will have a positive meaningful effect on the intention of accepting the technology.

• The Journal of Asian Finance, Economics and Business
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• v.6 no.4
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• pp.201-212
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• 2019

The study aims to identify the role of transformational leadership toward work performance through intrinsic motivation in pharmaceutical field by a survey of 220 pharmacists in Vietnam. The pharmaceutical industry in Vietnam is experiencing rapid growth, accompanied by the need for a change in leadership for managers. The transformational leadership creates a proactive, positive attitude, passion, interest or an increase in intrinsic motivation of employees, thereby affecting work performance. This study performed reliable verification by Cronbach's Alpha coefficient, then the factors are analyzed by EFA before conducting multivariate regression analysis. The results showed that the transformational leadership style includes such factors as: idealized influence (attributed and behavior), inspirational motivation, intellectual stimulation, individualized consideration have a positive impact on intrinsic motivation and thereby positively affecting work performance. It confirms that employees will have a higher intrinsic motivation level when working under transformational leadership from their leaders. It makes employees work more efficiently. According to the research results, the pharmacist has an intrinsic motivation to work hard on tasks that contribute to the group overall goal of. That requires managers to have a task assignment strategy to connect the goals of the members together as well as of the members to the group.

• Journal of Distribution Science
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• v.18 no.9
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• pp.45-53
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• 2020

Purpose: This study aims at investigating consumers' choice in online food purchasing behavior and the impact on repurchase for fresh food delivery which has recently shown rapid growth in Korea. The study focuses on the user experience factors af fecting satisfaction and intention to continuously use the online food market. Research design, data and methodology: The survey was conducted by 309 people who had purchased fresh food online, and the analysis was conducted using SPSS and AMOS. Structural Equation Modeling was used for the analysis for the verification of hypotheses. The factors that consumers value when ordering fresh food delivery services were defined as system quality, service quality, commodity quality, brand characteristics, and economics from the preceding study and the relationship between satisfaction and willingness to repurchase was verified. Results: When consumers purchase fresh food online, system quality, product quality, brand characteristics, and economics have had a significant impact on satisfaction. Meanwhile, of the five optional attributes of consumers, only economic efficiency has been verified to have a statistically significant impact on repurchase intentions. Conclusions: The results of the study suggested factors that consumers consider important when ordering fresh food online, providing basic data for companies to develop related strategies.