• Journal of Information Technology Applications and Management
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• v.18 no.1
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• pp.55-74
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• 2011

The growth in the use of ubiquitous computing based on mobile services as an enabler to conduct business more effectively has been phenomenal. Technology acceptance model (TAM) has been applied in different contexts to examine a wide range of information technologies (IT). As more and more companies are finding ways to utilize ubiquitous computing based on mobile services, an important issue is to understand what factors will impact the decisions of consumers in adopting the services. Based on TAM with three additional groups of external factors, i.e., service-related factors (ubiquitous access, context awareness) and technology-related factors (perceived security risk, network connectivity) that are theoretically justified as having influence on both perceived usefulness and perceived ease of use which are additionally considered, a research model for the investigated technology acceptance was developed and empirically examined, using responses from more than intended users of ubiquitous computing based on mobile services. The specific purposes of this study are as follows. Firstly, this study is to identify service beliefs considering unique characteristics for ubiquitous services such as perceived ubiquitous access and perceived context awareness. Secondly, this study is to investigate network characteristics beliefs such as perceived security and perceived connectivity. Thirdly, this paper investigates the relationship among variables such as ubiquitous characteristics, network characteristics, behavioral beliefs, and intention to use ubiquitous web services. This study uses a structural equation model to test the research model. The major results of this study are as follows. Firstly, ubiquitous access has a influence on perceived usefulness and perceived ease of use. Context awareness has an influence on perceived usefulness. Secondly, User familiarity has an influence on perceived usefulness and perceived ease of use, and intention to use. User innovativeness has an influence on perceived ease of use. Thirdly, perceived security risk has an influence on perceived usefulness and perceived ease of use. Network connectivity has an influence on perceived usefulness and perceived ease of use. Fourth, there exist differential effects among factors in structural model among information, transaction, and entertainment services.

• Journal of Korea Multimedia Society
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• v.23 no.1
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• pp.85-92
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• 2020

This paper analyzes the design and usability of maternal notebook mobile application and suggests the improvement direction of the application. The researcher compared and analyzed the functions of maternal notebook applications, conducted user interviews and expert evaluations. The conclusions of this study are the use of appropriate information volume, proportional screen division focusing on main functions, the use of GNB format of main menus, the prohibition of double menu configuration, the use of color consistent with the image of the service, the use of few font sizes, the use of appropriate colors in typography, the use of rich icons with uniform design, card format, list format, but also timeline and infographic forms that make rich user interface design. Maternal notebook application research is expected to be an important reference for research on similar mobile applications with complex functions such as information provision, user history, and community, along with improved research in healthcare design.

• Spatial Information Research
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• v.4 no.2
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• pp.107-119
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• 1996

The purpose of this study was to carry out land use suitability analysis of Seoul Metropolitan City based on ecopolis planning concept or environmentally sound and sustainable development. Objectives of the analyses were to save energy by increasing urban density and allocating urban land use types near to public transportation system, to increase food producing capacity by restoring fertile agricultural lands, and to enhance urban ecosystem by expanding and networking parks and green spaces. This study has two phases. First, the land use suitability analyses for commercial, industrial, residential, agricultural, and green spaces were carried out. Second, required urban land use .types were allocated based on ESSD concept. Two alternative land use plans were developed based on two population sizes:existing population of 11million and 4.4million derived by the application of ermergy theory of T. Odum.

• Annual Conference of KIPS
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• 2001.10a
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• pp.347-350
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• 2001

이 논문은 기존의 Use Case 방법론을 개선하려는데 초점을 두고 있다. Use Case 방법론의 설계단계 중, 설계 프랙티스(Design practices)단계에 소프트웨어 테스팅 개념을 적용하였다. 이 방법은 먼저 사용자의 요구 사항을 상호작용 다이어그램을 통해 분석하고, 설계 컴포넌트(Design Component Units)라고 불리는 기능적 컴포넌트들로 새롭게 정의하고 추출한다. 추출된 기반을 바탕으로 생성된 설계 컴포넌트들을 설계 스키마(Design schema)에서 계층구조로 분할하는 방법이다. 여기서 개발자들의 목적에 따라 선택한 수 있도록, 다양한 기준에 적용한 수 있는 여러 가지 설계 컴포넌트들을 정의하였다. 개선된 Use Case 방법론을 토대로 변환 알고리즘[11]을 이용해 새로운 Use Case 툴을 개발하고자 한다.

• Journal of Electrical Engineering and information Science
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• v.1 no.2
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• pp.87-95
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• 1996

This paper presents a (k,n) threshold digital signature scheme with no trusted dealer. Our idea is to use the EIGamal signature scheme modified for group use. Among many digital signature schemes, our modification has a nice property for our purpose. We also show a (k.n) threshold fail stop signature scheme and two (k.n) threshold undeniable signature schemes. We use [10] as the original fail stop signature scheme, and use [3] and [2] as the original undeniable signature schemes. Since all these schemes are based on the discrete log problem, we can use the same technique.

• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.2
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• pp.371-382
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• 2024

This study explored the factors affecting the intention to use ChatGPT for adult men and women. The results are summarized and presented based on the hypothesis as follows. First, perceived ease of use had a positive effect on perceived usefulness. Second, information reliability did not have a significant effect on perceived usefulness. Third, information quickness had a positive effect on perceived usefulness. Fourth, perceived ease of use had a positive effect on user satisfaction. Fifth, perceived usefulness had a positive effect on user satisfaction. Sixth, information reliability did not have a significant effect on user satisfaction. Seventh, information quickness had a positive effect on user satisfaction. Eighth, user satisfaction had a positive effect on the intention to use.

• The Journal of Society for e-Business Studies
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• v.16 no.3
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• pp.211-224
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• 2011

Since appearance of smart devices and cloud computing services, the social and economical values of administrative information have been magnified as valuable information. In order to make better use of various administrative information by diverse government organizations efficiently and effectively, information sharing based on legal systems is essential because of several obstacles including privacy. To suggest practical ways for using administrative information, this study categorized the administrative information sharing process, and analyzed the regulations and legal systems that are contradictory to the regulations. The result of analysis appears that there is a need of legislative base for well-defined business use of information, and a need of the organizations, that available to collect and manufacture the information. The results of this study can be expected to make legislation contributions not only for industries, but also by suggesting the policy making and guidelines to protect privacy and improve the quality of citizens' life.

• Journal of Korean Public Health Nursing
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• v.25 no.1
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• pp.48-60
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• 2011

Purpose: The number of people using the internet to meet their health information needs is growing. However, little is known about the characteristics of the senior internet health information seeker. The purpose of this study was to identify the socio-demographic and health-related characteristics, as well as the internet health information seeking behaviors and attitudes in the elderly. Method: Data was collected from 385 elderly subjects(aged 55 years or older) and living in Seoul and Gyeonggi. We used questionnaires developed by researchers in this study. Data was analyzed using the following methods: descriptive statistics, t-test, $X^2$-test and Fisher's exact test. All statistical tests were performed using the SAS version 9.13. Results: The elderly using the internet to seek health information had relatively good subjective health and were living with a spouse. In general, the purpose of internet use was to search for information, and mainly used at home. The search in the disease management area was higher than the frequency of searches for health promotion. The elderly showed a generally positive attitude regarding health information. Conclusion: It is needed to increase the use of the Internet for finding health information and promote accessibility for internet health information in the elderly.

• Asia pacific journal of information systems
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• v.17 no.3
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• pp.1-24
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• 2007

With the development of information technology (IT), various information systems (IS) such as Web-based systems and mobile systems have appeared utilizing different technologies. However, recent studies on IS use and user satisfaction rarely account for technological differences among IS and environmental characteristics where IS are intended to be used. The purpose of this research is to investigate the determinants of the use of Web-based ticketing systems for cultural activities and to empirically validate their relationships. Environmental psychology suggests that human beings respond to external stimuli from environments with their emotions, and their emotional states influence human actions, e.g., IS use in this research. Applying environmental psychology to the use of Web-based systems in the culture and entertainment industry, we propose that web site characteristics first influence a user's internal state of mind (i.e., flow) and then the flow state influences the IS use. Studies related to the state of flow collectively affirm the key role played by the flow construct in shaping individual attitudes and behaviors toward IS. Users' flow states are captured by their shopping enjoyment, perceived behavioral control, and the level of concentration on the IS use. Referring to social presence theory, we have included such web site characteristics as content quality, context of web site, and community quality. In our research model, a second order construct is utilized to represent web site quality, because flow theory suggests that holistic experiences with web-based systems (rather than individual characteristics of the web site) are important in explaining the IS use. Further, we have included trust as another important factor influencing the IS use since business transactions on the web encompass higher uncertainty comparing to offline transactions. In order to test our hypotheses, we have conducted an online survey which results in 1,141 valid responses in the final sample. The data were collected from respondents who have experiences in Internet ticketing systems. Although it was a convenient sample, the sample represents a wide variety of user demographics. Validity and reliability of the research instrument were tested and research hypotheses were examined using PLS Graph 3.0. The results indicate that web site characteristics significantly influence the level of user concentration, user's enjoyment in shopping, and perceived behavioral control. Further, the use of Internet ticketing systems is influenced by users' flow states and trust in the web channel. User satisfaction is turned out to be affected by the use of Internet ticketing systems. Unlike extant research on the relationship between web site characteristics and its use, our study has found that, in the culture and entertainment industry, the impact of web site characteristics on IS use is mediated by a user's flow state. This finding has a practical implication that web site design should include as many features that enhance shopping enjoyment and concentration. Other practical implications of these findings and future research implications are also discussed.

• Journal of Korea Society of Digital Industry and Information Management
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• v.11 no.2
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• pp.181-192
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• 2015

A new communication revolution such as social networking service (SNS) has been transforming the way of interaction between people in both of individual level and organizational level. Recently many people have switched to closed type SNS such as Naver Band and Kakao group due to the several reasons. The purpose of this study is to investigate the usage motivation and satisfaction of SNS based on use and gratifications perspectives. Based on prior studies on use and gratifications of Internet-related media and SNS, information motivation, relationship motivation, pleasure/entertainment motivation, self-expression motivation, work motivation were identified as usage motivation of SNS. This empirical study explores how these motivations vary between open type SNS(facebook and twitter) and closed type SNS(band and kakao group). This study contributes to provide the base of activation strategies and practical implications for companies using SNS as a marketing tool.