• Journal of Digital Contents Society
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• v.18 no.3
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• pp.517-524
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• 2017

The aim of this study was to provide basic contents which are based on the appropriate understanding, use, and information of smart devices for young children. The researcher surveyed mothers regarding the effects of their children's development as a result of using smart devices. A survey of 134 mothers with three to five-year-old children currently attending daycare centers or kindergartens was carried out. By using SPSS 18.0, the collected data of survey results was implemented via t-test and F verification. Study findings are as follows: First, the result of the survey analysis indicated that most mothers perceived that using smart devices did not heavily influence their child's development. Second, the mothers' perception was varied depending on whether it was their child's the first time using smart devices, the mother's education level, and on the mother's employment situation. However, there was no difference of perception in regards to gender. The results of this study suggest the necessity of parental intervention and prevention of side effect of children 's smart device use and parent education program.

• Journal of Digital Convergence
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• v.18 no.12
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• pp.543-548
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• 2020

The purpose of this study is to implement various movements of multiple objects using a small number of power devices in producing a kinetic design, achieving an effect similar to a work comprised of multiple objects controlled using multiple power devices. While it is more typical to control various objects using multiple power devices, the use of multiple devices leads to higher costs and heavier overall weight. In addition, more power is required to operate the multiple power devices. This study applied a mechanism that allows multiple objects to perform various movements using a small number of power devices. The mechanism significantly reduces overall weight and power consumption. In addition, various movements could be expressed by increasing the rows and columns of objects through the use of the camshaft structure that changed the position and shape of the cam and the use of bevel gears. The significance of this study lies in presenting a new method of controlling multiple objects for designers involved in kinetic design.

• Journal of Digital Contents Society
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• v.10 no.2
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• pp.233-238
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• 2009

The advances in the digital communication and network technology, Internet technology and the proliferation of smart appliances in home, have dramatically increased the need for a high speed/high quality home network. As consumer electronic devices and computing devices are increasing in the home network, it is obvious that the data traffic of home network increases as well. Various home network devices want to access Internet servers to get multimedia contents. Therefore, we introduce TLC(Telephone Line Carrier) system for networked digital consumer electronic appliances within a house using Ethernet or wire/wireless technology. In the future home network environment, the primary purposes of the smart home network based TLC are to create low-cost, easily deployable, high performance, and wide coverage throughout the home. In this paper, the channel capacity of telephone line communication system is evaluated and compared as a function of transmission power, number of OFDM carrier, channel loss, and noise loss for smart home network.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.11
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• pp.1592-1598
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• 2022

This paper proposes an improvement system for the marginalized digital underprivileged of these services due to the lack of intuition and usability for the recently increasing number of unmanned ordering devices' interfaces and device environments. The problem with kiosk service is that it lacks intuition among design principles and cannot be used by wheelchair passengers in environments that meet general standing standards. To solve this problem, we propose a service that can use kiosk-like environments on mobile devices by photographing QR codes with mobile devices. As a result of the experiment, people in their 20s did not experience difficulties in using the existing kiosk model, but in the case of the elderly, it was difficult to use the kiosk, so they asked for help. The improved kiosk model was carried out in their 20s without difficulty, and the results showed that it was carried out without difficulty even in the case of the elderly.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.371-374
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• 2016

In the digital business environment, digital trust has became a key element of business compete. With the Internet of Things(IoT) development, the success of businesses that participate in the world of connected devices depends on the level of digital trust consumers have in them. This paper introduced the definition and elements of digital trust, analyzed status of digital trust in IoT era, then puts forward the countermeasure of strengthening digital trust.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.193-195
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• 2004

This paper presents a novel data transmit method using display units of mobile devices. Mobile devices such as personal-digital-assistants (PDAs) and cellular phones have a display unit. The typical display unit is a liquid-crystal-display (LCD) with an back-light. Since the proposed data transmit method uses the LCD or back-light as a data transmitter, it is a kind of sightable light communication. Tn order to transmit the data, the display unit drived by an application program on the platform of mobile devices. In this paper, detailed data transmit scheme, specific data protocol are presented and discussed. Finally, with the experimental results, usefulness of the proposed data transmit method is verified.

• Journal of Korea Multimedia Society
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• v.7 no.12
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• pp.1754-1764
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• 2004

Lately mobile handheld devices such as Personal Digital Assistant (PDA) and cellular phones are getting more popular for personal web surfing. However, today most mobile handheld devices have relatively poor web browsing capability due to their low performance so their users have to suffer longer communication latency than those of desktop Personal Computers (PCs). In this paper, we propose an effective pre-refresh mechanism for embedded web browser of mobile handheld devices to reduce this problem. The proposed mechanism uses the idle time to pre-refresh the expired web objects in an embedded web browser's cache memory. It increases the utilization of Central Processing Unit (CPU) power and network bandwidth during the idle time and consequently reduces the client's latency and web browsing cost. An experiment was done using a simulator designed by us to evaluate the efficacy of the proposed mechanism. The experiment result demonstrates that it has a good performance to make web surfing faster.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.9 no.1
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• pp.23-28
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• 2015

This study is to investigate the accessibility compliance status of smart devices for people with disabilities in the information age, smart and offer improvements. Vision of smart devices, operating systems (IOS, Android, Windows) based smart devices currently in use by most, hearing, investigation and provide handicapped accessibility status and improvement measures derived from a comparative analysis of the Disabled Accessibility Improvement of smart devices was presented.

• Electronics and Telecommunications Trends
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• v.32 no.6
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• pp.27-39
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• 2017

A variety of medical devices are utilized to repair or help injured body functions after accidental injury(such as a traffic accident), population aging, or disease. Such medical devices are being actively researched and developed in portable form, skin patchable type, and further, implantable form. In the future, active implantable medical devices for neuro and brain sciences are expected to be developed. Active implantable medical devices that detect brain signals and control neurology for a wider understanding of human cognition and nerve functions, and for an understanding and treatment of various diseases, are being actively pursued for future use. In this paper, the core elements of implantable devices that can be applied to neuro and brain sciences are classified into electrode technologies for bio-signal acquisition and stimulation, analog/digital circuit technologies for signal processing, human body communication technologies, wireless power transmission technologies for continuous device use, and device integration technologies to integrate them. In each chapter, the latest technology development trends for each detailed technology field are reviewed.

• International Journal of Internet, Broadcasting and Communication
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• v.5 no.1
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• pp.18-22
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• 2013

We introduce, in this paper, a novel approach of protection mechanism for data which are transmitted not only between the networked devices but also between the digital media devices. As the devices are getting more powerful and more storage capacity, they can process the encoded/encrypted data autonomously. However, all devices must know the secret key that used to encrypt data, and also use secure method to distribute that key. Moreover, there are no protection mechanisms supporting end-to-end copy protection which result in the fact that the data passed through various devices can be manipulated or captured. Therefore, we propose a RFID-based key distribution and protection mechanism to resolve these problems.