• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권12호
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• pp.6152-6168
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• 2017

Recently, the biometric-based authentication systems such as FIDO (Fast Identity Online) are increased in mobile computing environments. The biometric-based authentication systems are performed on the mobile devices with the battery, the improving energy efficiency is important issue. In the case, the size of images (i.e., face, fingerprint, iris, and etc.) affects both recognition accuracy and energy consumption, and hence the tradeoff analysis between the both recognition accuracy and energy consumption is necessary. In this paper, we propose an energy-efficient way to authenticate based on biometric information with tradeoff analysis between the both recognition accuracy and energy consumption in multimedia IoT (Internet of Things) transmission environments. We select the facial information among biometric information, and especially consider the multicore-based mobile devices. Based on our experimental results, we prove that the proposed approach can enhance the energy efficiency of GABOR+LBP+GRAY VALUE, GABOR+LBP, GABOR, and LBP by factors of 6.8, 3.6, 3.6, and 2.4 over the baseline, respectively, while satisfying user's face recognition accuracy.

• 한국산업정보학회논문지
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• 제5권4호
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• pp.73-80
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• 2000

본 논문에서는 NIN적으로 구현된 웹사이트와 직관적으로 명확한 웹사이트를 비교 분석하여 NIN적인 항해 설계가 지닌 단점을 보완하면서 시각적으로 우수한 직관적인 인터페이스를 웹사이트 유저들에게 제공할 수 있는 방법을 제시한다. NIN의 문제점을 안고 있는 웹사이트의 그래픽적 인터페이스를 본 논문에서 실험한 시각적 직관화로 개선하여 구매 의도를 가진 방문자가 시각적으로 뛰어나다는 느낌을 가질 수 있게 하면서도 직관적으로 사이트의 항해 구조를 쉽게 파악하게 할 수 있게 하였으며 또한 결제과정을 완료하기에 용이하도록 함으로써 인터넷 비즈니스 시스템의 고유 목적인 사업의 성공을 위한 토대를 마련하였다. 실험에 있어서 NIN적인 웹사이트는 실제로 운영되고 있는 사이트의 사례를 연구하였으며, NIN의 문제점을 시각적 직관화로 개선한 웹사이트의 구현에는 Flash 도구를 이용하였다.

• 디지털콘텐츠학회 논문지
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• 제13권3호
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• pp.373-383
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• 2012

국제 기능올림픽대회 한국위원회에서는 21세기 산업정책의 시대적 요구에 부응하기 위하여 애니메이션직종에 우수 기능 습득 및 인력 양성이 필요하다는 연구와 공청회를 통하여 2009년부터 애니메이션을 신규 경기직종으로 채택하였다. 청소년 애니메이터의 기능과 기술, 창의력을 개발하는데 도움을 주는 기능경기대회는 사회적 참여와 인간관계를 형성시켜 주기도 한다. 본 연구에서는 4년간 운영된 애니메이션직종의 경기과제와 과제출제방식을 참가선수 및 지도교사들의 인터뷰, 애니메이션 전공자들의 설문을 통하여 과제를 세부적으로 분석하고 발전적인 방향을 제언함으로써 애니메이션직종의 우수기능인 발굴과 기능수준의 향상을 목적으로 하였다.

• 한국환경교육학회지:환경교육
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• 제22권2호
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• pp.79-91
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• 2009

The purpose of this study is to find out the influence of the urban stream investigation on elementary school students' environmental conservation awareness. The urban stream investigation was applied to the experimental group and the control group has been taught by the traditional teaching method focused on the teacher's lecture. To analyze the effect of urban stream investigation, the pre- and post-tests on environmental conservation awareness composed of interest in living things, perception about water pollution and environmental conservation were applied to the both groups. The results were analyzed by One-way ANOVA and ANCOVA. As a result, there were not significant difference between the experimental and the control group in the pretest(p>.05). In the post-tests on the student's interest in living things, perception about water pollution and environmental conservation the scores of the experimental group were higher than those of the control group(p<0.05). Therefore, the urban stream investigation made a positive effect on improving of elementary school students' environmental conservation awareness.

• The Journal of Korean Physical Therapy
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• 제30권1호
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• pp.1-7
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• 2018

Objective: This study aimed to determine the efficacy of flexible pole training combined with lumbar stabilization in improving trunk muscle activities and to investigate the difference according to posture in young adults. Methods: Twenty-five participants were enrolled in this study. The subjects were randomly allocated into either the flexible pole group or the rigid pole group. Participants performed lumbar stabilization exercises on quadruped and curl-up, with the flexible pole or rigid pole. Electromyography was used to assess the percent maximal voluntary isometric contracion (%MVIC) of the rectus abdominis (RA), external oblique (EO), internal oblique (IO), and erector spine (ES) muscles. All participants completed one 30-minute session per day, 3 days per week, for 6 weeks. The evaluation was performed before and 6 weeks after the training, and follow-up. The data were analyzed using independent t-test and two-way repeated measure analysis of variance to determine the statistical significance. Results: The flexible pole in curl-up showed significant differences in EO and IO muscle activities compared with the rigid pole. The flexible pole in quadruped showed significant differences in IO and ES muscle activities compared with the rigid pole. The RA, EO, IO, and ES muscle activities of both groups were significantly higher after 6 weeks training. Conclusion: The flexible pole in curl-up and quadruped showed an improvement in trunk muscle activation. The flexible pole combined with lumbar stabilization will be useful as an exercise tool to improve activity of trunk muscles.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1994년도 추계학술대회 논문집
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• pp.472-477
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• 1994

The lockup clutch is embeded on torque converter of automatic transmission to prevent the efficiency deterioration of torque converter in high speed. For improving fuel consumption rate, it is desirable to engage the lockup clutch earlier. But, it results in degrading shift quality, due to the transient torque. The transient clutch pressure which affects the shifting quality, should be controlled properly. In this study, to solve the problem, it is analysed the hydraulic circuit of lockup system including line pressure regulating circuit, established the nonlinear model, and designed the PID controller. The line pressure is supplied to the lockup clutch through the lockup control valve by switching the lockup solenoid valve on. In order to control the transient pressure actively, it is needed to control the lockup solenoid valve by closed loop control. The lockup solenoid valve is 2-way on-off valve, and is adequate for PWM control. To reduce the pressure chattering, the carrier frequency is increased. Target pressure profile is computed from optimized velocity difference profile throuth dynamic equation of vehicle system.

• 보건교육건강증진학회지
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• 제23권1호
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• pp.93-107
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• 2006

Objectives: This research has been conducted in order to conduct sex education using E-Learning which is currently taught to students of women's high school. 138 students at women's high school in Inchon were applied, and then they were divided two different groups: a comparison group of 69 students, a control group of 69 students. Method: A questionnaire used by the literature studies. After verifying content validity, it was modified and supplemented in this way: sex knowledge was 23, and sex attitude 25. Results: 1) Comparison group will show increased marks on sex knowledge after the education than before whereas those from control group. 2) Comparison group will show increased marks on sex attitude after the education than before whereas those from control group. Conclusion: From the results of this research, it can be said that the sex education using E-Learning was the most effective method in improving the sex knowledge and attitude of students at women's high school. Therefore, it is advisable that the sex education methods using E-Learning should be developed and applied continuously.

• 대한안전경영과학회지
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• 제10권4호
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• pp.173-179
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• 2008

The portion of air logistics is getting growing in the global logistics and customer need the rapidity and accuracy for freight delivery. But, the process of air logistics is so complicated because there are too many stakeholders involved in the process. So we suggest the way to make simple the process for improving ability of handling air freights. First, we analyze the AS-IS process and problems by studying previous documents and researching the field. Also we offer how to adopt the ways that are solutions concerning AS-IS process. Second, we suggest integrated information system that will make it simple the air logistics process and mitigate the intensive work load of air cargo. Also we show the reliance about our suggestion by simulation comparing TO-BE process to AS-IS process. We result in that this study will contribute to improve air logistics process by making simple the process.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2000년도 가을 학술발표회논문집
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• pp.141-148
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• 2000

In system design, it is not always possible that all decision makers can cooperate fully and thus avoid conflict. They each control a specified subset of design variables and seek to minimize their own cost functions subject to their individual constraints. However, a system management team makes every effort to coordinate multiple disciplines and overcome such noncooperative environment. Although full cooperation is difficult to achieve, noncooperation also should be avoided as possible. Our approach is to predict the results of their cooperation and generate approximate Pareto set for their multiple objectives. The Pareto set can be obtained according to the degree of one's conceding coupling variables in the other's favor. We employ approximation concept for modelling this coordination and the mutiobjective genetic algorithm for exploring the coupling variable space for obtaining an approximate Pareto set. The approximation management concept is also used for improving the accuracy of the Pareto set. The exploration for the coupling variable space is more efficient because of its smaller dimension than the design variable space. Also, our approach doesn't force the disciplines to change their own way of running analysis and synthesis tools. Since the decision making process is not sequential, the required time can be reduced comparing to the existing multidisciplinary optimization techniques. This approach is applied to some mathematical examples and structural optimization problems.

• Journal of Magnetics
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• 제8권3호
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• pp.118-120
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• 2003

As an alternative promising way of producing high coercivity Sr-ferrite for a permanent magnet application, intensive mechanical milling process was applied to the raw materials of the Sr-ferrite with different composition. Synthesising reactivity for the Sr-ferrite of the mechanically milled raw material containing $SrCO_3$, $La_2O_3$, $Fe_2O_3$, $Co_3O_4$, and $SiO_2$ was inferior to that of the raw material containing $SrCO_3$ and $Fe_2O_3$, The Sr-ferrite prepared from mechanically milled raw materials had profoundly improved magnetic properties compared to the Sr-ferrite prepared by conventional method. Beneficial effect of the substituting ($La_2O_3$, $Co_3O_4$) and additive ($SiO_2$) oxides for improving the magnetic properties was not exploited in the Sr-ferrite prepared from the mechanically milled raw material. The Sr-ferrite powder prepared from the mechanically milled raw materials was magnetically isotropic in nature.