• ETRI Journal
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• v.34 no.1
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• pp.76-86
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• 2012

The block cipher ARIA has been threatened by side-channel analysis, and much research on countermeasures of this attack has also been produced. However, studies on countermeasures of ARIA are focused on software implementation, and there are no reports about hardware designs and their performance evaluation. Therefore, this article presents an advanced masking algorithm which is strong against second-order differential power analysis (SODPA) and implements a secure ARIA hardware. As there is no comparable report, the proposed masking algorithm used in our hardware module is evaluated using a comparison result of software implementations. Furthermore, we implement the proposed algorithm in three types of hardware architectures and compare them. The smallest module is 10,740 gates in size and consumes an average of 47.47 ${\mu}W$ in power consumption. Finally, we make ASIC chips with the proposed design, and then perform security verification. As a result, the proposed module is small, energy efficient, and secure against SODPA.

• Communications of the Korean Mathematical Society
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• v.19 no.2
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• pp.321-328
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• 2004

In this paper, we will prove the following: Let D be a nonempty of a normed linear space X and T : D -> X be a nonexpansive mapping. Let ${x_n}$ be a sequence in D and ${t_n}$, ${s_n}$ be real sequences such that (i) $0\;{\leq}\;t_n\;{\leq}\;t\;<\;1\;and\;{\sum_{n=1}}^{\infty}\;t_n\;=\;{\infty},\;(ii)\;(a)\;0\;{\leq}\;s_n\;{\leq}\;1,\;s_n\;->\;0\;as\;n\;->\;{\infty}\;and\;{\sum_{n=1}}^{\infty}\;t_ns_n\;<\;{\infty}\;or\;(b)\;s_n\;=\;s\;for\;all\;n\;{\geq}\;1\;and\;s\;{\in}\;[0,1),\;(iii)\;x_{n+1}\;=\;(1-t_n)x_n+t_nT(s_nTx_n+(1-s_n)x_n)\;for\;all\;n\;{\geq}\;1.$ Then, if the sequence {x_n} is bounded, then $lim_{n->\infty}\;$\mid$$\mid$x_n-Tx_n$\mid$$\mid$\;=\;0$. This result improves and complements a result of Deng [2]. Furthermore, we will show that certain conditions on D, X and T guarantee the weak and strong convergence of the Ishikawa iterative sequence to a fixed point of T.

• Current Photovoltaic Research
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• v.8 no.2
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• pp.50-53
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• 2020

GaN based photoelectrode has shown good potential owing to its better chemical stability and tunable bandgap with materials such as InN and AlN. Tunable bandgap allows GaN to make the maximum utilization of solar spectrum, which could improve photoelectrode performance. However, the problems about low photoelectrode performance and photo-corrosion still remain. In this study, we attempt to investigate the photoelectrochemical (PEC) properties of phosphor application to InGaN photoelectrode. Experimental result shows YAG:Ce³⁺ and beta-SiALON phosphor result in the highest photoelectrode performance of InGaN.

• Journal of Gifted/Talented Education
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• v.22 no.4
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• pp.929-942
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• 2012

The purpose of this study was to propose for efficient selection with observation and nomination system and efficient operation of Convergence Science class in a Science Institute for Gifted Youth attached in university. For this purpose, we analyzed the result of entrance exam with observation and nomination system, and the correlation between enterance exam score and achievement to perform at the Convergence Science class. As a result, despite observation and nomination system is highly dependent on observers and recommenders, they have very different perspectives each other. In addition it was founded that selection and education process after admission is inconsistent.

• Journal of the Korea Convergence Society
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• v.12 no.5
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• pp.365-372
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• 2021

This study was conducted to identify the level of quality of life and factors influencing on quality of life in Korean women with breast cancer and cervical cancer. This study was secondary analysis using The seventh Korea National Health and Nutrition Examination Survey (KNHANES). In the result of this study, women with the lower age, higher household income, and higher self-rated health status, had the higher level of quality of life. Following the result, intervention strategies are needed to enhance self-rated health and to improve quality of life in women with lower age and lower household income.

• The Korean Journal of Food & Health Convergence
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• v.9 no.1
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• pp.19-28
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• 2023

The purpose of this study is to explore which areas have been more interested in depression research in Korea through analysis of academic papers related to depression, and then to provide insights that can solve future depression problems. 1,032 papers searched with the keyword "depression" in scienceON were analyzed using Python 3.7 for word frequency analysis, word co-occurrence analysis, BERTopic, LDA, and OLS regression analysis. The results of word frequency and co-occurrence frequency analysis showed that related words were composed around words such as patient, disorder and symptom. As a result of topic modeling, a total of 13 topics including 'childhood depression' and 'eating anxiety' were derived. And it has been identified as a topic of interest that 'suicidal thoughts', 'treatment', 'occupational health', and 'health treatment program' were statistically significant topics, while 'child depression' and 'female treatment' were relatively less. As a result of the analysis of research trends, future research will not only study physiological and psychological factors but also social and environmental causes, as well as it was suggested that various collaborative studies of experts in academia were needed such as convergence and complex perspectives for depression relief and treatment.

• Journal of Internet of Things and Convergence
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• v.6 no.1
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• pp.65-72
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• 2020

The purpose of this study was to examine the effect on improving communication by conducting a tea culture convergence program for elderly people using facilities. The subjects of this study consisted of a tea culture convergence program for 3 months, 60 minutes once a week for 7 people using the Elderly Day Care Center in the H-S S welfare center. Psychological and behavioral changes related to communication by sessions were compared by comparing elderly patients at each session of the Tea Culture Convergence Program.Tea culture convergence program was found to have a positive effect on behaviors and attitudes related to communication among the elderly in the facilities. As a result of analyzing pre- and post-action and attitudes, the Tea Culture Convergence Program brought positive changes in communication by acting as emotional and social support for the elderly. These findings suggest that the Tea Culture Convergence Program is a psychologically necessary program for the elderly in that it shows that the Tea Culture Convergence Program is an effective program that promotes communication among the elderly in the facilities.

• The Journal of Korean Association of Computer Education
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• v.22 no.6
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• pp.35-42
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• 2019

The purpose of this study is to investigate secondary school teacher's perceptions and needs of computer and information literacy(CIL) convergence education and to suggest implications for promoting CIL convergence education in the actual school fields. We conducted a survey on teachers perceptions and the needs for CIL convergence education and analysed 227 secondary school teachers responses. As a result, we found that the perception of the necessity of CIL convergence education was very high while understanding level of the CIL convergence education and the actual frequency of teaching experiences were relatively low. In addition, CIL convergence education activities are mainly conducted through Informatics curriculum rather than various subjects. We identified that the main constrains of CIL convergence education were the burden on the progress of subject based curriculum as well as the lacking of teaching and learning equipments including computers. We identified that the needs for empowering teachers professional developments and constructing the physical and institutional environments of school sites were high. In discussion, we suggested the support strategies in terms of teacher professional development, institutional supports, and physical environments.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.19 no.8
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• pp.15-21
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• 2020

We improved the sound pressure of the speaker and allowed the speaker to rotate 360 degrees to improve the effectiveness of the acoustic type bird repellent system. The prototype of the bird repellent system was developed by evaluating sound pressure characteristics by distance and direction and installing orchards. As a result of the evaluation, the extermination sound pressure increased from a distance of about 30 m to a maximum of 60 m, and through the rotary speaker, the extermination distance could be widened in all directions without specific direction.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.3B
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• pp.536-550
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• 2010

This study analyzes the characteristics of broadcasting law and telecommunication law and suggested the key legitimate of regulation where convergence law would go for in the convergence circumstances by drawing the common and differential characteristics of two laws. Moreover, in the value of inherent pursuit of broadcasting law and telecommunication law, this paper examined whether these values continued to be reflected in the convergence law, and indicated the direction how these values should adopt in the convergence law. The result of this study shows that strong entry regulation has applied to both broadcasting and telecommunications industry. Also, both industries have been required to be universal service to realize the value. Meanwhile, the pursuit of original value of broadcasting law and telecommunication law can be summarized as secure of access and diversity, respectively. In the convergence law, it is necessary to compensate and modify the meaning of access and diversity based on traditional regulation.