• Proceedings of the KIEE Conference
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• 1999.07c
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• pp.1076-1078
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• 1999

In this paper, pseudomeasurements have decided using real-time measurements and forecasting data in order to reduce the difference between accuracy of real-time measurements and pseudomeasurements. A decided pseudomeasurement by means of the presented method can look for estimated solution as compared to conventional pseudomeasurement because there is no difference between accuracy of measurements. The simulations are carried out for test systems and corresponding results are presented.

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.459-461
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• 1992

This paper presents the new method to recognize the 2D patterns dynamically by rotating the input patterns according to the difference vector. Generally neural network with many patterns leads to various recognition ratio. The dynamic management of input patterns means that we can move pixels to desired locations controlled by the difference vector. We divide dual neural network model into two parts at learning phase, respectively. And then we combine them to construct the total network. Our model has some good results such that it has less number of patterns and reduced learning time. At present, we only discuss the four way movement of input patterns. The research for the complex movement will be fulfilled later.

• Journal of computational fluids engineering
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• v.9 no.4
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• pp.64-70
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• 2004

A kinetic theory analysis is used to study the ultra-thin gas flow field in a gas slider bearing. The Boltzmann equation simplified by a collision model is solved by means of a finite difference approximation with the discrete ordinate method. Calculations are made for a flow in a micro-channel between an inclined slider and a moving disk drive platter The results are compared well with those from the DSMC method. The present method does not suffer from statistical noise which is common in particle-based methods and requires much less computational effort.

• The Korean Journal of Community Living Science
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• v.23 no.4
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• pp.447-455
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• 2012

The purpose of this study was to investigate children's conception of liquid conservation according to their ages and tasks in the boiling phenomenon The subjects were thirty 4-year-olds, thirty 6-year-olds, and thirty 8-year-olds recruited from two day-care center, one kindergarten, and one elementary school, in Seoul. Statistical methods used for data analysis were frequencies, percentiles, means, standard deviations and repeated measures ANOVA. As the result, there was a significant difference in children's conception of liquid conservation in the boiling of water according to their ages. 8-year-old children showed higher levels of cognition than 4 and 6-year-olds. There was no difference in children's conception of liquid conservation in the boiling of water according to tasks.

• 한국전산유체공학회:학술대회논문집
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• 2004.10a
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• pp.207-213
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• 2004

A kinetic theory analysis is used to study the ultra-thin gas flow field in a gas slider bering, The Boltzmann equation simplified by a collision model is solved by means of a finite difference approximation with the discrete ordinate method. Calculations are made for a flow in a micro-channel between an inclined slider and a moving disk drive platter. The results are compared well with those from the DSMC method. The present method does not suffer from statistical noise which is common in particle based methods and requires much less computational effort.

• MALSORI
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• no.53
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• pp.157-169
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• 2005

This paper proposes an efficiently representing method of spatial cues on multichannel spatial audio coding. The Binaural Cue Coding (BCC) method introduced recently represents multichannel audio signals by means of Inter Channel Level Difference (ICLD) or Source Index (SI). We tried to express more efficiently ICLD and SI information based on Inter Channel Correlation in this paper. We adopt different spatial cues according to ICC and propose a compensation method of empty spectrums created by using SI. We performed a MOS test and measuring spectral distortion. The results show that the proposed method can reduce the bitrate of side information without large degradation of the audio quality.

• English Language & Literature Teaching
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• v.12 no.2
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• pp.153-176
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• 2006

This paper examines "Difference in Requests." The study of speech acts is a crucial area in sociolinguistics and ethnolinguistics, and has aided in the development of TESOL. It also provides a useful means of relating linguistic form and communicative intent. This paper concentrated on 3 request strategies, which were requests made with an explanation, requests made without an explanation and no requests. The purpose of this study, and of concern in TESOL, was to discover whether Koreans framed their requests differently under different conditions. Based on these differences, I wanted to ascertain whether Koreans who spoke English as a second language, and who have lived in the United States, frame their requests as they would in their native tongues thus creating the potential for sociolinguistic failure, or use American sociolinguistic style. As the results of the study, it was found that in the majority of cases, Americans made an explanation with a request. In many cases the Koreans living in Korea would not give an explanation when making a request. Rather, they were direct in request. In many cases the Korean speaking English and living in the US had adopted the American request strategy of giving an explanation.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.18 no.1
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• pp.61-74
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• 2014

This paper presents accurate and efficient numerical methods for calculating the sensitivities of two-asset European options, the Greeks. The Greeks are important financial instruments in management of economic value at risk due to changing market conditions. The option pricing model is based on the Black-Scholes partial differential equation. The model is discretized by using a finite difference method and resulting discrete equations are solved by means of an operator splitting method. For Delta, Gamma, and Theta, we investigate the effect of high-order discretizations. For Rho and Vega, we develop an accurate and robust automatic algorithm for finding an optimal value. A cash-or-nothing option is taken to demonstrate the performance of the proposed algorithm for calculating the Greeks. The results show that the new treatment gives automatic and robust calculations for the Greeks.

• Korean Journal of Child Studies
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• v.26 no.6
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• pp.1-15
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• 2005

The purposes of this study were to assess children's emotional competence, to examine whether there was a difference in children's emotional competence according to their gender, and to investigate the relationship between children's emotional competence and their play behavior. The subjects of this study were 104 four-year-old children(56 boys, 48 girls). Collected data were analyzed by frequency, percentage, means, standard deviation and Pearson's correlation. The results were as follows : First, there was meaningful correlation among the emotional competence measured by teacher, the understanding and expression of emotion and the emotional regulation measured by mother. Second, there was difference in children's emotional competence according to gender. Specifically, girls showed better competence in the socio-behavioral emotional competence and the understanding and expression of emotion than boys. Third, the dramatic play and the group play had some meaningful correlation with the emotional competence measured by teacher and the understanding and expression of emotion measured by mother.

• Korea Journal of Hospital Management
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• v.15 no.3
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• pp.97-122
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• 2010

This research investigated the effect of leadership on organizational effectiveness in the public hospital. As a result of multi-regression analysis based on the data of 384 employees in 5 public hospitals in Korea, transformational leadership positively affected organizational commitment and job satisfaction. Transformational leadership had a significantly negative effect on turnover intention. Transactional leadership had a significantly positive relationship with organizational commitment and job satisfaction. This study has means that was first analysed relationship between the leadership style and organizational effectiveness of public hospital in Korea. The difference that demographic variables have on organizational commitment, job satisfaction, and turnover intention examined. Variables like gender and type of occupation have a significant difference.