• Journal of Information Technology Services
• /
• v.11 no.4
• /
• pp.1-23
• /
• 2012

The growing interest in smartphones has increased the number of studies conducted on technology acceptance and user satisfaction. It is now over two years since the launching of smartphones, but there are not many researches on the usage behavior of today's smartphone users. Smart devices have evolved from smartphone to smart pad and smart TV, but there are still not many studies on variables such as knowledge about the parent product and the ability to use it. With this, I decided to study how the motivation and the ability of using smartphones affected the smartphone user's intention to use smartpads. This study presents the usage behavior of smartphone users and proves that the ability to use a parent product (smartphone) affects the user's intention to use an extension product (smartpad). The research results showed that the smartphone usage ability affected both variety of use and rate of use. The convenience and passing time factors affected variety of use; and the social interaction, entertainment and passing time factors affected rate of use. As for the intention to use smartpads, the smartphone usage ability and variety of use positively affected the smartphone user's intention to use smartpads. This study showed that the more the user used a smartphone to pass time and for convenience, the more effectively the user could use various functions. It proves that the variety of use of smartphone is highly related to the acceptance of smartpads. This study also proves that usage ability is an important factor in using innovative products, such as smart devices.

• Journal of Korean Society of Water and Wastewater
• /
• v.9 no.2
• /
• pp.118-126
• /
• 1995

The variation of the urban water demand and the amount of water in the distribution reservoir was studied with time for a day. The city of Kwangju in Korea was selected as a study area. The population of Kwangju in the end of 1993 was more than one million and two hundred thousand peoples. The average of daily water use in 1993 was about three hundred and fifty thousand tons a day. One day was devided into 12 divisions with a 2 hour increment. The water use demand related to the amount of water in the distribution reservoir was observed for the given time interval of a day. The water use index was defind in percentage that indicates the ratio of the amount of water use for a time interval to the amount of water use for a day. The water use index with consideration of the water stored in the reservoir was found to be useful to manage and to operate the water supply systems in real time.

• Journal of Information Technology Services
• /
• v.12 no.4
• /
• pp.205-218
• /
• 2013

Recently, due to the proliferation of smartphones, users of mobile banking services which are based in wireless Internet without constraint of the time and places are significantly increased. In the study, considering the characteristics of mobile banking services based on the smartphone and the user behavior. we analyse the factors which have an effect on the behavioral intention to use mobile banking services based on the smartphone. For this purpose, we use the model which is based on Technology Acceptance Model (TAM) and add two constructs:the perceived enjoyment and the perceived risk. A survey data for 194 students at the K cyber university is used for statistical analysis. As a result, the perceived ease of use affects the perceived usefulness and the perceived enjoyment, and the perceived ease of use. And the perceived usefulness and perceived enjoyment affect continuous intention to use. On the other hand, the hypothesis which the perceived risk would affect adversely the continuous intention to use is rejected. Through this study, we expect to provide the useful implications for the smartphone banking services and contribute to the development of strategy for them.

• Child Health Nursing Research
• /
• v.21 no.2
• /
• pp.183-193
• /
• 2015

Purpose: The purpose of this study was to identify the influence of parental media use, parents' educational needs regarding media use, and parents' media guidance for children on the children's media use. Methods: The participants were 161 parents of elementary school children in the 1st and 4th grades. Data were collected through self-report questionnaires, and analyzed using the SPSS/WIN 19.0 IBM program. Results: The average times for watching television and using the internet in the children were 11.44 hours and 5.89 hours per week, respectively. Children's time watching television was influenced by parents' time watching television, children's gender (girl), and parents' educational needs. Children's television dependency was influenced by parents' educational needs, parents' time watching television, and parents' age (under 36 years). Time using the internet and internet dependency in the children were influenced by parents' educational needs, family monthly income (under 3 million won), and parents' guidance for children on watching television. Conclusion: The findings indicate that elementary school children's media use is influenced by parental media use, parents' educational needs, and parents' media guidance for children. Therefore parental factors should be considered in developing approaches to provide education programs to prevent media overuse in children.

• Magazine of the Korean Society of Agricultural Engineers
• /
• v.38 no.2
• /
• pp.108-122
• /
• 1996

This study was to introduced estimation model for optimum probabilistic rainfall intensity on hydrological area. Originally, probabilistic rainfall intensity formula have been characterized different coefficient of formula and model following watersheds. But recently in korea rainfall intensity formula does not use unionize applyment standard between administration and district. And mingle use planning formula with not assumption model. Following the number of year hydrological duration adjust areal index. But, with adjusting formula applyment was without systematic conduct. This study perceive the point as following : 1) Use method of excess probability of Iwai to calculate survey rainfall intensity value. 2) And, use method of least squares to calculate areal coefficient for a unit of 157 rain gauge station. And, use areal coefficient was introduced new probabilistic rainfall intensity formula for each rain gauge station. 3) And, use new probabilistic rainfall intensity formula to adjust a unit of fourteen duration-a unit of fifteen year probabilistic rainfall intensity. 4) The above survey value compared with adjustment value. And use three theory of error(absolute mean error, squares mean error, relative error ratio) to choice optimum probabilistic rainfall intensity formula for a unit of 157 rain gauge station.

• Journal of Information Technology Services
• /
• v.12 no.2
• /
• pp.243-256
• /
• 2013

Recently, due to the proliferation of smartphones, users of mobile multimedia services which are based on wireless internet without constraint of the time and places are significantly increased. In this study, considering the characteristics of mobile multimedia and the user behavior, we analyse the factors which have an effect on the behavioral intention to use the mobile multimedia services. For this purpose, we use the model which is based on Technology Accepted Model (TAM) and add two constructs; the perceived enjoyment and the perceived risk. A survey data for 280 students at the K cyber university is used for statistical analysis As a result, the perceived ease of use affects the perceived usefulness and the perceived enjoyment, and the perceived ease of use. And the perceived usefulness and perceived enjoyment affect continuous intention to use. On the other hand, the hypothesis which the perceived risk would affect adversely the continuous intention to use is rejected. Through this study, we expect to provide the useful implications for the mobile multimedia services and contribute to the development of strategy for them.

• Journal of Korean Society for Atmospheric Environment
• /
• v.18 no.6
• /
• pp.453-463
• /
• 2002

Prognostic meteorological model, MM5V3 (Mesoscale Model 5 Version 3) was used to assess the effects of the land-use modifications on spatial variations of temperature and wind fields in Busan during the selected period of summer season in 2000. We first examined sensitivity analysis for temperature between MM5V3 predictions and meteorological data observed at 4 AWS (Automatic Weather System) stations in Busan, which exhibited low structural and accurate errors (Mean Bias Error, MBE: 0.73, Root Mean Square Error, RMSE: 1.18 on maximum). The second part of this paper, MMSV3 simulations for the modification of land-use was performed with 1 km resolution in target domain, 46$\times$46 $\textrm{km}^2$ area around city of Busan. It was found that modification result from change of surface land-use in central urban area altered spatial distributions of temperature and wind. In particular, heat island core moved slightly to the seaward at 1300 LST. This results may imply that modification of surface land-use leads to change the thermal environments; in addition, it has a significant effect on local wind circulations and dispersions of air pollutants.

• Journal of the Korean Society for Library and Information Science
• /
• v.35 no.4
• /
• pp.5-23
• /
• 2001

The purpose of this research is to survey the current status of CD-ROM acquisitions and use at public libraries. For this purpose, the questionnaires prepared to examine the information environments, CD-ROM acquisitions and use as well as the future plans for CD-ROM use were sent to seven public libraries in Daegu. This paper consists of the introduction, the characteristics and trends of CD-ROM publications, the present status of CD-ROM publishing in Korea, and the analyses of acquisitions and use of CD-ROMs at public libraries. It is intended to find out if there is any relationship between CD-ROM publishing and CD-ROM use at public libraries. It concludes that the CD-ROM collections of public libraries are related to the publishing of CD-ROM, but the use of CD-ROMs cannot be claimed to reflect the publishing. Some interpretations and recommendations for the results are suggested.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.20 no.2
• /
• pp.143-153
• /
• 2009

This paper identifies some natural habits and patterns of children's and adolescents' information seeking and use by drawing a wide range of studies conducted with children and adolescents as study participants. The patterns reported here indicate that children's and adolescents' information seeking and use are affected by the nature of information tasks, the qualities of access tools, their cognitive ability to seek and use information, and their prior knowledge and experience about the tasks and topics given. The findings should provide insights for identifying future research issues as well as for programming the information environments particularly conducive to learning.

• Korean Journal of Health Education and Promotion
• /
• v.22 no.4
• /
• pp.91-105
• /
• 2005

Purpose: The purpose of this study was to describe the current status of managing educational programs for tobacco use prevention at middle and high schools located in Busan. Methods: Using a survey method with a 29-item self-administration questionnaire, the data were collected from January 10 through February 18, 2005, from school nurses as well as teachers major in healthcare of 227 participant schools. Results: A strategic plan for school-based educational programs of tobacco use prevention was mainly developed by a school nurse at middle school and a teacher in charge of school discipline at high school. The educational programs for tobacco use prevention were implemented for approximately 40% of schools in Busan with the budget ranged from 110,000 won to 200,000 won a year. Eighty five percepts of the schools had anti-tobacco regulations and guidelines in place. Twenty two percents of the middle and high schools collected the data regarding adolescents' smoking status periodically. Over 70% of schools provided tobacco use prevention education programs as a part of regular semester curriculum. Conclusions: For making the management of educational programs for tobacco use prevention effective and consistent with government's anti-smoking policy, schools need (a) development of tobacco management guideline and regulations with participation of teachers, students, and parents, (b) clear job and role descriptions for personnel to plan and implement anti-tobacco programs, (c) compilation of the budget enough to implement the programs, (d) periodically assessment of adolescents' smoking status, and evaluation of the programs to monitor whether those are effective for adolescents' health promotion; and (e) to make an effort to less range of quality in educational programs for tobacco use.