• Journal of the Institute of Convergence Signal Processing
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• v.2 no.2
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• pp.1-6
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• 2001

Eigenface method in face recognition is useful due to its insensitivity to large variations in facial expression and facial details. However its low recognition rate necessitates additional researches. In this paper, we present an efficient method for improving the recognition rate in face recognition using eigenface feature. For this, we performs a comparative study of three different classifiers which are i) a single prototype (SP) classifier, ii) a nearest neighbor (NN) classifier, and iii) a standard feedforward neural network (FNN) classifier. By evaluating and analyzing the performance of these three classifiers, we shows that the distribution of eigenface features of face image is not compact and that selections of classifier and sample training data are important for obtaining higher recognition rate. Our experiments with the ORL face database show that 1-NN classifier outperforms the SP and FNN classifiers. We have achieved a recognition rate of 91.0% by selecting sample trainging data properly and using 1-NN classifier.

• Journal of Digital Convergence
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• v.14 no.9
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• pp.341-348
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• 2016

The purpose of this study was to investigate the association between masticatory ability and oral health-related quality of life using the Oral Health Impact Profile (OHIP-14) of the elderly. Total 195 elderly subjects were assessed for subjective masticatory ability, objective masticatory ability and OHIP-14 concerned with quality of life. When masticatory ability is low, the odds ratio(OR) of the quality of life is worse was increased. After adjusted age, residence, education, denture, odds ratio of subjective masticatory ability was 2.42(p<0.05) increased and odds ratio of objective masticatory ability was 7.58(p<0.001) increased. This study showed significant association between masticatory ability and the total OHIP-14 score of the quality of life of the elderly. Masticatory ability can affect quality of life oral health-related in elderly. While following up on various studies were carried out as a long-term, I hope it will be of help in improving the quality of life of the elderly with maintaining a healthy oral health.

• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.83-90
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• 2018

We have studied the optimal conditions for design and development on the communication device for a bilateral, and it's electrodes for transmitting electric signal are constructed on the $36^{\circ}$ rotated $LiTaO_3$ substrate by evaporating Al-Cu(W 30%) alloy. At first, we manufactured three kind of samples using this method, and selected two samples as similar with frequency, ripple and passband characteristics, and then we connect two samples by series in order to make bilateral devices. As results, we obtained that the electrode structure has better characteristics then the others, when it's width of reflector and electrode are $1{\lambda}/4$, $1{\lambda}/12$ respectively, and it's frequency is approximately 190.3MHz. Near future, I hope to help the manufacture for communication devices for the multi-channel and the duplex filter.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.81-88
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• 2017

I conducted a study on the capacity evaluation and management of the main homepage screen to improve the availability of government institutions. As a result of three times evaluating the size of the homepage main page of the major institutions, the capacity of the homepage of the institution was very enormous, and when there were many concurrent users, the server was easily loaded. Governmental management guidelines are needed to fundamentally solve these problems, with the periodic and ongoing homepage management of each institution. In the future, the web site management detailed checkpoints should be additionally established in the government web site installation and management guidelines, and the recommended checking items; homepage performance evaluation, lightening homepage capacity.

• Journal of Convergence for Information Technology
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• v.10 no.3
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• pp.217-226
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• 2020

The study was conducted to investigate the improvement nail health in middle-aged women aged 40~60 years who intake soybean koji by incubating Aspergillus oryzae(황국균), and utilized non-fermented soybeans as a control group and soybean koji as an experiment group for eight weeks. After clinical trials, the lifting and cracking conditions of the nails in the experiment group were improved, The moisture content increased 5.1 times compared to the control group, The water loss was 1.4 times less the reduction to the control group. and nail thickness increased by 1.9 times compared to controls. Wrinkles on the surface improved by about 2.4 times compared to the control group. In conclusion, consumption of this soybean koji of A. oryzae's has been shown to have an impact on improving nail is expected to be used Therefore, I propose this soybean koji of A. oryzae's as an inner beauty for improving nail is in middle-aged women aged 40~60 years.

• Journal of the Institute of Convergence Signal Processing
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• v.5 no.2
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• pp.159-164
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• 2004

This paper proposes a new digital filter implementation which adopts an identical structure at both behavioral and logic level in top-down design. This methodology is based on the observation that multiplication is a form of convolution and carrying, and therefore multiplication is implemented with the same structure as that of a convolution in a recursive manner at the logic level. In order to demonstrate a recursive structure-based FIR digital filter, we select L-tap transposed and systolic FIR filters, and implement them to have a single structure. The proposed filter design becomes regular and modular because of the recursive adoption of a single structure for convolutions, and is very compact in that it needs only two 1-bit I/O ports in addition to significant improvement on hardware complexity without time penalty on the output sequence.

• Journal of the Korean Society of Industry Convergence
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• v.20 no.2
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• pp.177-186
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• 2017

With the latest developments in ICT(Information Communication Technology) technology, research on Intelligent Car, Connected Car that support autonomous driving or services is actively underway. It is true that the number of inputs linked to external connections is likely to be exposed to a malicious intrusion. I studied possible security issues that may occur within the Connected Car. A variety of security issues may arise in the use of CAN, the most typical internal network of vehicles. The data can be encrypted by encrypting the entire data within the CAN network system to resolve the security issues, but can be time-consuming and time-consuming, and can cause the authentication process to be carried out in the event of a certification procedure. To resolve this problem, CAN network system can be used to authenticate nodes in the network to perform a unique authentication of nodes using nodes in the network to authenticate nodes in the nodes and By encoding the ID, identifying the identity of the data, changing the identity of the ID and decryption algorithm, and identifying the cipher and certification techniques of the external invader, the encryption and authentication techniques could be detected by detecting and verifying the external intruder. Add a monitoring node to the CAN network to resolve this. Share a unique ID that can be authenticated using the server that performs the initial certification of nodes within the network and encrypt IDs to secure data. By detecting external invaders, designing encryption and authentication techniques was designed to detect external intrusion and certification techniques, enabling them to detect external intrusions.

• Journal of Convergence for Information Technology
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• v.9 no.12
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• pp.104-114
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• 2019

This study was to find factors affecting on recognition and performance of peripheral intravenous infusion management among pediatric nurses. In analysis using SPSS/Win 24.0, the average scores of recognition and performance were 3.34±0.39, 3.42±0.37 out of 4 each. 'Maintenance and exchange' and 'education' were the lowest each among subdomains. There're significant differences in recognition and performance according to working departments et. al.(p=.039, p<.001), and there's a positive correlation between recognition and performance(r=.591, p<.001). Factors affecting on recognition were performance(β=.57) and working department(β=.22), and on performance were recognition(β=.57) and educated experience(β=.19). And explanation rate were 41.2%, 41.4% each in stepwise multiple regression. In conclusion, recognition and performance were mutually influencing factors. Therefore, it is needed to increase performance by preparing measures to improve recognition of peripheral intravenous infusion management.

• Journal of Korea Society of Digital Industry and Information Management
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• v.15 no.2
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• pp.87-99
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• 2019

The purpose of this study is to examine an organizational ICT(Information and Communication Technology) performance by ICT investment and policy consistency of government organizations. As the rapid development of ICT is becoming an essential element of social culture, the ICT operation of bureaucratic government also is becoming important. The central government has invested substantially new ICT for improving the quality of nationwide service and to promote administrative efficiency. However, various departments of government occur frequently duplication investments of ICT, and budget conflicts between organizations caused difficulties in maximizing ICT competency. I will confirm the ICT operational performance by ICT investment behavior and organizational work competency as well as the significance of ICT policy consistency. The method of study used a structural equation. The research model set ICT investment behavior as independent variables, organizational work competencies and policy consistency as mediations, and operational performance as dependencies. As a result of the research, New ICT interests show negative effects that caused work change between government organizations and government-funded body. But, New ICT convergence shows positive effects on increasing the two competency variables. The two competency variables show negative effects that caused changes in ICT policy consistency and show no impact on the ICT operational performance. The ICT policy consistency shows a positive effect on enhancing ICT operational performance. The study contribution explain updated the contingency theory and because the ICT policy consistency is essential, negotiation between government organizations will be important. Future research will require a qualitative study through interviews in government organizations about consistency enhance of ICT policy.

• Journal of Digital Convergence
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• v.17 no.2
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• pp.453-462
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• 2019

This study investigates the relationship between controllability, severity, unrealistic optimism and risk perception of risk factors related to location - based SNS services for smartphone users. For this purpose, I surveyed university students who had experience using location - based SNS service. The main results are as follows. First, controllability has a statistically significant effect on unrealistic optimism. Second, Severity had a statistically significant negative impact on unrealistic optimism. Third, Controllability did not have a statistically significant effect on risk perception, Fourth, Severity did not have a statistically significant effect on perceived risk. Fifth, Unrealistic optimism had a statistically significant negative impact on perception of risk. The results of this study will contribute to the prevention of privacy incidents and the protection of smartphone users by using location - based SNS service. On the one hand, future research will need to look at the relationship between unrealistic optimism and risk prevention or coping behavior.