• The Transactions of the Korean Institute of Electrical Engineers D
• /
• v.53 no.9
• /
• pp.638-643
• /
• 2004

Middleware enables different networking devices and protocols to inter-operate in ubiquitous home network environments. The UPnP(Universal Plug and Play) middleware, which runs on a PC and is based on the IPv4 protocol, has attracted much interest in the field of home network research since it has versatility The UPnP, however, cannot be easily accessed via the public Internet since the UPnP devices that provide services and the Control Points that control the devices are configured with non-routable local private or Auto IP networks. The critical question is how to access UPnP network via the public Internet. The purpose of this paper is to deal with the non-routability problem in local private and Auto IP networks by improving the conventional Control Point used in UPnP middleware-based home networks. For this purpose, this paper proposes an improved Control Point for accessing and controlling the home network from remote sites via the public Internet, by adding a web server to the conventional Control Point. The improved Control Point is implemented in an embedded GNU/Linux system running on an ARM9 platform. Also this paper implements the security of the home network system based on the UPnP (Universal Plug and Play), adding VPN (Virtual Private Network) router that uses the IPsec to the home network system which is consisted of the ARM9 and the Embedded Linux.

• Journal of the Korea Society of Computer and Information
• /
• v.14 no.9
• /
• pp.157-165
• /
• 2009

The purpose of this study was to investigate the relationship between internet addiction in adolescent and influencing factor traits. In addition, the relationship between internet addiction and environmental coping strategies were examined. To examine the main purpose. analyzed as followed. According to the results of study. First, What have influencing factors on internet addiction? Second, How about were relationship between multidimensional factors correlation and multiregression analysis? Third, What about were prevention and coping strategies on internet addiction in adolescent period? According to the analysis with coping strategies researches, the results were presented as follows. Results showed that have positive correlation with internet use time, escape from reality, impulsivity, depression, anger control by examined results of Young addiction measure. Significant variables have influencing internet addiction with internet use time, escape from reality internet use, depression, anger control impulsivity. Based on these study results, This paper made a suggestion about prevention prescription and coping strategies of influencing factors on internet addiction in adolescent.

• International Journal of Internet, Broadcasting and Communication
• /
• v.4 no.1
• /
• pp.3-7
• /
• 2012

Traditionally SCADA is connected only in a limited private network. With new technology and facilities, there are also demands of connecting SCADA though the internet. The internet SCADA facility has brought a lot of advantages in terms of control, data viewing and generation. Aside from connecting SCADA to the internet, there are also operators who want to connect their system wirelessly. This can save budget for communication lines. Along with the advantages it brings, are security issues regarding wireless internet SCADA. In this paper, we discuss internet SCADA, its connection through wireless communication and the security issues surrounding it. To answer the security issues, a symmetric-key encryption for internet SCADA is proposed.

• Health Policy and Management
• /
• v.12 no.2
• /
• pp.92-114
• /
• 2002

While making a vigorous discussion about self-regulation for exponential growth of harmful health information on the Internet, many countries lave made various efforts to select and circulate high quality health information on the Internet. The purpose of this study Is to review the serf-regulation methods of health information on the Internet and to suggest quality control methods of health information on the Internet suitable for Korea. Self-regulation methods of the health information on the Internet include ‘content rating system(or content selection system)’, ‘codes of conduct or guideline’, ‘internet hot-line’, ‘education for information providers and consumers’. Any self-regulation method should be used with other methods. We can regulate health information on the Internet effectively by using both self-regulation methods and compulsive methods such as law. Also information providers, information consumers, specialists, consumer representatives, scholars, governments officers should take part in doing these efforts and make concern.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.5 no.11
• /
• pp.2254-2271
• /
• 2011

Access control in dynamic environments needs the ability to provide more access opportunities of information to users, while also ensuring protection information from malicious users. Trust and risk are essential factors and can be combined together in access control decision-making to meet the above requirement. In this paper, we propose the combination of the trust and risk in access control to balance information accessibility and protection. Access control decision is made on the basis of trustworthiness of users and risk value of permissions. We use potential relations between users and relations between permissions in access control. Our approach not only provides more access opportunities for trustworthy users in accessing permissions, but also enforces traditional access control constraints such as Chinese Wall policy and Separation of Duty (SoD) of Role-Based Access Control (RBAC) model in an effective way.

• Nutrition Research and Practice
• /
• v.1 no.4
• /
• pp.341-348
• /
• 2007

This study was to investigate utilization status of internet, health/nutrition websites among children, and to assess the needs for developing nutrition websites and education programs for children. The survey questionnaire was administered to 5-6th grade students (n=434) at two elementary schools. About 32% used the internet every day while 19.5% used it whenever they needed, showing significant differences in internet usage by gender (p<0.01). Although the subjects used the internet frequently, those who used health/nutrition websites were 23.3%. The purpose of using these sites were mainly 'to obtain health/nutrition information' (55%), 'to get information regarding weight control' (17%). Fifty-six percent of the users were satisfied with the nutrition websites, but only 30% said that they were helpful. The preferred topics in developing nutrition websites were assessment of obesity, exercise methods, weight control methods, nutrition information (e.g., diet for stature growth), dietary assessment and food hygiene. Girls showed more interest in these topics than boys (p<0.05). For school nutrition education, girls showed more interest than boys in topics for cooking snacks (p<0.001) and selecting snacks (p<0.05). In nutrition websites, subjects wanted to have information and game/quiz, as well as getting information using Flash animation. The favorite colors for screen and text were slightly different by gender (p<0.01). In school nutrition education, 89.5% of subjects liked to have activities (e.g., cooking, exercise, game). They also liked materials using computers, video and internet than printed materials. If nutrition education was done at schools, subjects wanted to receive 5.7 times of education per semester on average (mean length: 42.6 min/session). This study suggests that nutrition websites and education programs for children should include the topics such as assessment of obesity or diet, weight control and special information (e.g., diet for growth) as well as general information. In designing nutrition websites and programs, methods including game, quiz, Flash animation and activities (cooking, exercise) could be appropriately used to induce the interest and involvement of children.

• Journal of Scientific & Technological Knowledge Infrastructure
• /
• s.9
• /
• pp.52-59
• /
• 2002

현재 우리가 사용하고 있는 Internet Protocol인 TCP/IP(Transmission Control Protocol/Internet Protocol)중 어드레스 IPv4 10진수 체계가 16진수 체계로 변화된 것이 바로 IPv6 Address이다. IPv6 Address특징으로서는 기하 급수적으로 늘어나는 Internet Address를 감당해낼 수 있고, Multi-Media Data 처리가 능숙한 데다 보안성까지 갖추고 있어 앞으로 이용에 대한 장래성이 기대되는 프로토콜이다.

• Proceedings of the KIEE Conference
• /
• 2004.11c
• /
• pp.234-236
• /
• 2004

Transmission control protocol(TCP) is protocol used in internet. TCP is seldom transmission error and is protocol based on wire environment. TCP uses 3 way handshake ways, data transmission control through windows size, data transmission control through reception confirmation, sliding window for packet delivery. In this study, designed TCP packet ion module for analyze the TCP segments & correct information about TCP. TCP capture in internet using designed TCP module and analysed TCP segments composition. Through this, could analyze the correct information of protocol in network.

• Journal of Information Processing Systems
• /
• v.2 no.3 s.4
• /
• pp.143-146
• /
• 2006

We have designed an embedded controller for the control of a diesel generator using an embedded system. The generator is monitored and controlled remotely via the internet in real-time. The proposed digital controller is designed to handle precisely the distortions and noises of the signals emanating from the diesel generator, and enables abnormal operation of the diesel generator to be notified to the remote manager using the Short Message Service (SMS) of the Internet, which enables the appropriate personnel to take action by remote control according to the incoming messages.

• The Journal of the Korea Contents Association
• /
• v.11 no.7
• /
• pp.406-417
• /
• 2011

The purpose of this paper is to examine the effects of computer/internet game play on depression and life satisfaction via perceived self-control among older adults in Korea. Data were collected from a survey of 237 community-dwelling older adults (age${\geq}$65) who reported internet users. A path analysis was used to examine the causal relationship among the main constructs. Results showed that the computer/internet game play had positive effects on perceived self-control. Perceived self-control was found to decrease depression and improve life satisfaction among older adults. Additional analysis indicated that the computer/internet game play in older adults did not directly affect mental health (depression and life satisfaction) but indirectly affected it via perceived self-control. Furthermore, perceived self-control had greater effects on depression than on life satisfaction. These findings have crucial implications in that perceived sense of self-control needs to be seriously considered when we develop mental health games for older adults.