• International journal of advanced smart convergence
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• v.9 no.4
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• pp.106-114
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• 2020

As information and communication technology develops, it brings various benefits to our lives. However, information and communication technology has had various side effects in our lives. Representative side effects include internet addiction, smartphone addiction, copyright violation, personal information infringement, cyber bullying and hacking. Recently, smart phone addiction rate is increasing with the spread of smart devices in Korea. In this study, we analyze the correlation between age group and smartphone addiction. In order to obtain fair and objective results, statistical analysis was performed based on the national statistical data of the National Information Society Agency. The results showed that the infant group and the adult group were correlated with the smartphone addiction rate. In this study, we analyzed the causes of smartphone addiction for different age groups. We also discuss dangers of smartphone addiction for different age groups. In additions, we proposed various ways to prevent and cure smartphone addiction for infants, adults, and senior citizen group. The results of this study are expected to be widely used as a remedy for smartphone addiction and future smartphone addiction research works.

• Journal of electromagnetic engineering and science
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• v.17 no.4
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• pp.221-227
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• 2017

A new approach to designing a broadband and highly efficient class-E power amplifier based on nonlinear shunt capacitance analysis is proposed. The nonlinear shunt capacitance method accurately extracts optimum class-E power amplifier parameters, including an external shunt capacitance and an output impedance, at different frequencies. The dependence of the former parameter on the frequency is considered to select an optimal value of external shunt capacitor. Then, upon determining the latter parameter, an output matching network is optimized to obtain the highest efficiency across the bandwidth of interest. An analytical approach is presented to design the broadband class-E power amplifier of a MOSFET transistor. The proposed method is experimentally verified by a 140-170 MHz class-E power amplifier design with maximum added power efficiency of 82% and output power of 34 dBm.

• ETRI Journal
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• v.31 no.5
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• pp.525-533
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• 2009

This paper proposes a distributed borrowing addressing (DIBA) scheme to solve problems of failure in address assignments resulting from limited tree depth and width when the distributed address assignment mechanism is used in a ZigBee/IEEE 802.15.4 wireless sensor network. DIBA is a method of borrowing addresses from neighbor nodes for newly entering nodes and assigning the borrowed addresses. Its network or sensing coverage can increase with almost the same overhead as the existing method. DIBA is a simple and lightweight means of addressing and routing, making it suitable for wireless sensor networks. Simulations showed that DIBA is a distributed addressing scheme with consistently excellent performance.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.7
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• pp.1260-1266
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• 2007

The information and communication technology under developing from was time of broadcast and communication Convergence. There is iCOD with representative service of broadcast and communication Convergence. This the superhigh speed Internet about under using is the service which provides information service, the video contents and broadcasting and others with TV. But this service when it searches broadcasting information of different Channel, again must analyze the stream of broadcasting there is a problem point. This thesis hereupon iCOD broadcasting services it searched efficiently from the terminal and in order the fact that it selects from iCOD broadcasting streams SI information about under extracting SD&S base iPG XML documents it created and it transmits with the distant mote cast the method which and it planned it embodied.

• Korean Management Science Review
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• v.31 no.4
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• pp.107-116
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• 2014

Recently, various types of information and communication technology (ICT) such as cloud computing, big data, and virtual reality have been progressed in the world. Also, it is expected that there are many domestic and foreign visitors in Gangwon-do due to the Pyeongchang winter olympic games in 2018. In this environment, it is necessary to improve the competitiveness of Gangwon-do in winter sports areas exploiting both existing IT infrastructure and application technologies. In this paper, for sustainable development of Gangwon-do winter sports IT industry after the Olympics, we propose efficient implementation methods of 3 winter sports IT convergence services and Gangwon-do ICT activation strategy. The proposed 3 winter sports IT service areas are as follows. 1) Realistic winter sports IT service, 2) Winter sports medical IT service 3) Winter sports record analysis IT service.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.10
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• pp.2171-2179
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• 2010

Currently, advanced countries are absorbed in vision research related to 'Technology Convergence', which is a 21 century Megatrend. They establish Technology Convergence strategy based on information and communication technology (ICT), and vision research that utilizes the scenario method is actively progressing. In this paper, scenario-based vision research case study using WWRF (Wireless World Research Forum), AmI (Ambient Intelligence), and mITF (mobile IT Forum) is conducted. The proposed 'engineering scenario method' is based on the case study results. Therefore, a future strategy study using the proposed scenario-based method is analyzed. The 'engineering scenario method' can provide a new direction in vision strategy research.

• Journal of Advanced Information Technology and Convergence
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• v.8 no.2
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• pp.147-157
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• 2018

In this study, we analyzed an outdoor visible light communication system and implemented it through a simulation. We designed a Reed-Solomon encoder, a variable interleaver structure, and set it to the Institute of Electrical and Electronics Engineers (IEEE) 802.15.7 PHY I specification mode. We also analyzed the performance of an additive white gaussian noise (AWGN) channel environment using a root-raised-cosine (RRC) filter, implemented a MATLAB simulation and analyzed its performance. The results showed a requirement for an additional signal-to-noise ratio (SNR) of approximately 1.5 dB in a 3-ray multipath visible light channel environment than in an AWGN environment.

• Journal of Convergence for Information Technology
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• v.7 no.6
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• pp.79-87
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• 2017

The purpose of the convergence study is to confirm the relevance between communication awareness and communication ability and communication self-efficacy. The subjects were 128 college students studying convergence education. They answered to a self-report questionnaire during March 13 to 24, 2017. The instrument for Awareness toward communication, Communication ability, Communication self-efficacy was done by Likert 5 point scale. Data was analyzed by technical statistics, t-test, one way ANOVA, Pearson's correlation coefficient and post-hoc Scheffe test using SPSS/Win 21.0 program. As a result, awareness toward communication level $3.50{\pm}.41$ point, communication ability $3.32{\pm}.38$ point and communication self-efficacy $3.00{\pm}.40$ among. Communication Awareness was positively correlated with communication ability level and communication self-efficacy. If there is an intervention program that improve the level of communication self-efficacy, it is expected to enhance the communication ability.

• Proceedings of the KIEE Conference
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• 2006.10c
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• pp.250-252
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• 2006

Due to enhanced high IT (information technology) development, IT-based technology convergences such as IT/ET(electric technology), IT/BT(biology technology) and IT/NT(nano technology) are actively merging trend and their applications spread wide. In this paper PLC (power line communication), one of the merging IT, is investigated as one of the potential IT candidates for IT/ET and IT/BT convergence technology for DLC (direct load control) or bio-medical engineering such as ubiquitous health cares or D2H2 (distributed diagnosis and home health care).

• International journal of advanced smart convergence
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• v.11 no.4
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• pp.141-148
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• 2022

Due to the fast development of information and communication technology, many people are enjoying benefits. However, there are those who do not enjoy the benefits of such information technology due to physical disabilities or economic reasons. This class is classified as an information-vulnerable class with so-called digital divide, and the disabled can be said to be a representative information-vulnerable class. The purpose of the paper is to identify the various causes of digital divide and propose improvement measures for the disabled in Korea. For this purpose, the digital divide data by the national institution over the past four years were analyzed. Through various statistical analysis, it was found that the main cause of the digital divide was insufficient information competency among the three factors diagnosing the digital divide namely, information access, information competency, and information utilization. It was also found that the information utilization activities of the disabled were not productive and consumption-oriented