• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.10
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• pp.1471-1478
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• 2010

Microforming processes have recently attracted considerable attention from industry and academia since they enable the production of microscale parts using various materials at a high production rate, minimize material loss, and provide parts with excellent mechanical properties. However, for successful development and applications of the microforming process it is critical to take the tribological size effect into consideration because previous studies have shown that traditional friction models for macroscale forming generate significantly erroneous results in the case of microforming. In this paper, we performed scaled ring compression experiments to investigate the tribological size effect of aluminum and brass materials in microforming. The sensitivity of the interfacial friction to the deformation characteristics of the ring was quantitatively analyzed by the finite element analysis. In addition, a friction model based on slip line field and upper boundary techniques was used to theoretically explain the friction mechanism in microforming.

• Proceedings of the Technology Innovation Conference
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• 1997.07a
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• pp.247-265
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• 1997

The objectives of not-for-profit organizations including government supported research institutes are, by definition, to achieve socially desired nonfinancial goals. Current reporting focuses on providing information to meet the needs of users. This information may be provided in the annual research report, financial report, and other reports. An objective of current reporting is to provide users with information that will assist them in evaluating the performance(efficiency and effectiveness) of reporting entity. The evaluation of R&D project's performance requires information not only about the acquition and use of resources, but also about the outputs and outcomes of R&D activities, This study aims to recommend that R&D Service Efforts and Accomplish- mints(SEA) reporting is useful for performance evaluation in national R&D programmes. To achieve this aims, I attempt to develop the R&D SEA measures with reference to the Concepts Statement No. 2 of the Governmental Accounting Standards Board. R&D SEA measures consist of five categories : (1) input measures, (2) outcome measures, (3) output measures, (4) re1a1e efforts to accomplishments, (5) explanatory information.

• Science of Emotion and Sensibility
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• v.18 no.4
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• pp.35-46
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• 2015

Prior research suggested that people generally show stronger intentions to help in-group members because people experience higher levels of empathy for those who are similar to themselves. The present research demonstrated that one's levels of cosmopolitanism would moderate the mediating role of empathy on the relationship between cultural similarities and helping intentions. In particular, it was examined how the mediator (empathy) affected the relation between cultural similarity and helping intention for participants with low to high levels of cosmopolitanism. Results indicated that participants with lower levels of cosmopolitanism showed stronger empathy as targets are more culturally similar to participants' own culture. Participants with higher levels of cosmopolitanism, however, reported the same levels of empathy regardless of targets' cultural similarity. The implications and limitations of the results were discussed.

• School Mathematics
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• v.5 no.1
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• pp.115-133
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• 2003

Investigation of the students' mathematical misconceptions is very important for improvement in the school mathematics teach]ng and basis of curriculum. In this study, we categorize second-grade middle school students' misconceptions on the learning of linear function and make a comparative study of the error-remedial effect of students' collaborative learning vs explanatory leaching. We also investigate how to change and advance students' self-diagnosis and treatment of the milton ceptions through the collaborative learning about linear function. The result of the study shows that there are three main kinds of students' misconceptions in algebraic setting like this: (1) linear function misconception in relation with number concept, (2) misconception of the variables, (3) tenacity of specific perspective. Types of misconception in graphical setting are classified into misconception of graph Interpretation and prediction and that of variables as the objects of function. Two different remedies have a distinctive effect on treatment of the students' misconception under the each category. We also find that a misconception can develop into a correct conception as a result of interaction with other students.

• The Journal of the Korea Contents Association
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• v.14 no.2
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• pp.343-354
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• 2014

The purpose of this study was to investigate the effects of marital conflicts on dyadic adjustment and the mediating effects of positive emotion and sex-role attitude. The participants were total 270 middle-aged married people and data was collected from April 12 to June 24 in 2014. The data was collected with structured questionnaire and analyzed with the SPSS 17.0 and AMOS 18.0 programs. Results were as follows. First, marital conflicts had a significant direct effect and indirect effect through the mediation of positive emotion on dyadic adjustment. Second, positive emotion had a significant mediating effect but sex-role attitude did not. Third, The modified model showed a good fitness indices( ${\chi}^2$=38.90 standardized ${\chi}^2$=1.77(CMIN/df), GFI=.97, AGFI=.94, NFI=.98, SRMR=.02, CFI=.99, RMSEA=.05) and explanation power was 88.9%. These results suggest that middle-aged dyadic adjustment can be improved by increasing positive emotion. This study results will be contribute to develop intervention program for enhancement of marital relationship and education program for middle-aged.

• The Journal of the Korea Contents Association
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• v.18 no.8
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• pp.494-502
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• 2018

The main objectives of this study are to examine the effects of stress on the experience of doing harm of the children and adolescents and to examine the moderating effect of human rights consciousness on the relationship between the stress and the experience of doing harm. To do this, we analyzed the data obtained from Survey on Human Rights of Children and Adolescents in 2015. The subject is 10,424 from the 4th grade of elementary school to the 3th grade of high school. To investigate the moderating effects of variable, we have conducted a hierarchical regression analysis and confirmed changes in explanatory power. As a result of that, first, it suggests that stress and human rights consciousness have direct effects on the experience of doing harm. This results show that the lower stress and the higher human rights consciousness is, the lower experience of doing harm is. Second, it was found that human rights consciousness is moderating variable on the relationship of between the stress and the experience of doing harm. Based on this results, this study has proposed the implications and limitations of it and suggestions for further study.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.1
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• pp.199-207
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• 2018

The purpose of this study was to examine the mediating effects of resiliency on the relationship between smartphone addiction and subjective happiness among university students. Participants included 570 students attending universities in Seoul, Gyeonggi, and Chungnam areas using self-report questionnaires. Data was analyzed with SPS 23.0 using descriptive statistics, Pearson's correlation coefficient, hierarchical multiple regression, and Sobel test with SPSS 23.0. The study results were as follows: first, as smartphone addiction increased, subjective happiness decreased (${\beta}=-.17$, p<.001). Second, as smartphone addiction increased, resiliency decreased (${\beta}=-.24$, p<.001). Third, as resilience increased, subjective happiness increased (${\beta}=.36$, p<.001). Fourth, resiliency partially mediated the relationship between smartphone addiction and subjective happiness (Z=-4.645, p<.001), and explained 16% of the variance. Findings show that resiliency can play a role in improving subjective happiness of university students. Finally, the implications and limitations of findings were discussed based on the results.

• Journal of Advanced Navigation Technology
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• v.13 no.4
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• pp.482-489
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• 2009

This paper proposes a CW(Continuous-Wave) bio-radar applying a new adaptive noise canceller based on ALE(Adaptive Line Enhancer) which can remove the Gaussian noise and system noise. Recently the research works on this CW bio-radar which can be used to detect heartbeat and respiration are advanced by the university and research facility. Although the researches describe CW bio-radar not only is vulnerable for the Gaussian noise but also has a disadvantage of decreasing the heart-rate accuracy due to the noise, the researches do not demonstrate the effective method for removing the noise component in a baseband signal. In this paper, a CW bio-radar applying the new adaptive noise canceller based on ALE which can remove the noise component is proposed. This paper compares and analyzes the performance for increasing the heart-rate accuracy according to removing the Gaussian noise and system noise in the baseband signal through the quadrature receiver which can alleviate the demodulation sensitivity to target position.

• Korean Journal of Cognitive Science
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• v.9 no.1
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• pp.47-60
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• 1998

The study was designed to investigate implicit and explicit memory effec representations of bilinguals. Hierarchical model of bilingual information processing word naming and translation tasks in the context of semantically categorized or rar Experiments 1 and 2, bilinguals first viewed stimulus words and performed naming or tr then implicit and explicit memory tasks. In experiment I, word recognition times(exp were significantly faster for semantic category condition than random category condi naming task and lexical decision taskOmplicit memory task)showed no difference in e experiment 2, naming task and exlicit memory task showed categorization effect but fOWE a and implcit memory task showed no categorization effect. These findings support the which posits that memory representations of bilinguals are composed of two independer a and one common conceptual store.

• 한국지구물리탐사학회:학술대회논문집
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• 2005.05a
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• pp.197-202
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• 2005

The electromagnetic signals associated with the seismic activity in the south-east offshore of Kii peninsula, Japan, were clearly recorded at the MT sites in Jeju island, Korea. In this research, we have identified the co-seismic electromagnetic signals associated with the seismic activity and have analyzed the characteristics of significant electromagnetic variations. The analysis of phase velocity, power spectral density, MT impedance and polarization direction shows that the significant earthquake signals have the frequency band of about 0.05 to 0.5 Hz and that the sources of electromagnetic field are local effects of passing seismic waves. The simple approximation using electrokinetic effect successfully explains the co-seismic EM signals coincides with measured data but cannot explain the localities of electromagnetic variations.