• The Journal of the Acoustical Society of Korea
• /
• v.9 no.6
• /
• pp.15-21
• /
• 1990

유-무-묵음 분류 과정은 음성분석시에 아주 중요한 문제중의 하나이다. 음성에너지, ZCR, 자기 상관계수, LPC 계수, 예측에러 에너지등을 퍼래미터로 사용하여 지금까지 많은 분류기법이 제안되어져 왔다. 이런기법들은 기본적으로 퍼래미터를 추출해야 하고, 이 때문에 많은 계산량이 요구되고, 이들 퍼 래미터는 음성 본래의 정보들의 대부분을 상실하게 된다. 이 때문에 각 프레임의 진폭분포를 사용하는 새로운 앨고리즘을 제안하였다. 첫째로 V-U-S 영역은 개별 진폭분포형태를 가지기 때문에 주어진 프레 임에서 진폭분포를 구한다. 그런 다음에는 신경망을 통해 분류를 하게 된다. 신경망은 문덕값을 별도로 선정할 필요없고, 배경잡음에 강력하며, 또한 실시간 처리에 적합하다.

• The Journal of the Acoustical Society of Korea
• /
• v.6 no.1
• /
• pp.23-28
• /
• 1987

This paper discusses a reference pattern creation for a speaker-independent Korean isolated word by using the clustering. Tn this paper we permitted to top 3 clusters and created reference pattern by Minimax Criterion. The features parameter used the LPC Coefficients and Autocorrelation and simple Itakura distance measure was used to measure similarity between patterns. With word reference patterns obtained as described above the recognition rate was within one choice only $55.9\%$, two choice only $76.9\%$, three choice only $89.5\%$.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.9
• /
• pp.3924-3933
• /
• 2012

The purpose of this study is to investigate the relationships of social support, marital conflict, self-efficacy, and mothers' parenting stress, which are known as affecting mothers' parenting behaviors of infants a lot. To this study, We used of Korea Institute of Child Care and Education's "Panel Survey of Korea Child; 2009" data. The subjects of mothers of 11~18 months infants 1,467(M=739, F=728). In order to analyze collected data, Person correlation analysis, regression/path analysis were used. The results of the study were as follows: First, the correlations among social support, marital conflict, self-efficacy, and mothers' parenting stress were between -.475 and .401, which are all significant on the level of within p<.01. Of those the correlation between the variable of self-efficacy, and mothers' parenting stress was shown highest as of -.475. Second, the correlations among these variables and mothers' parenting behaviors of infants were between -.484 and .350(all, p<.01). Mothers' parenting stress shows the highest correlations of all, next social support, self-efficacy, marital conflict in order. Third, multiple-correlation of .533, which explains at 28.4 percentage of total variance of the mothers' parenting behaviors. And -.396 in the degree of mothers' parenting stress, which explains at 15.7 percentage of the total variance of the mothers' parenting behaviors, while .223 in social support(4.97%). But marital conflict has not direct effects but indirect effects.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.9
• /
• pp.253-264
• /
• 2016

The aim of this study was to investigate the factors influencing nurses' pain management in patients with dementia. A total of 197 nurses were recruited from 30 long-term care hospitals in B city. Data were collected from June 25 to July 15, 2016. Data analysis was performed using the SPSS 22.0 program, which included a t-test, ANOVA, Scheffe test, Pearson's correlation, and multiple regression analyses. The levels of knowledge were low with a score of 10.73 out of 18. The level of attitudes, self-efficacy, barriers and performance were 2.98, 3.34, 2.90, and 4.09, respectively. In addition, there were significant differences in the level of performance depending on the age (p=.046), long-term care (p=.009), and pain education (p=.004). The level of attitudes (r=.21, p=.006), self-efficacy (r=.51, p<.001) and performance were positively correlated with each other. A significant negative correlation was observed between the barriers and performance (r=-.16, p=.035). The meaningful variables that influence the performance were self-efficacy, long-term care, and pain education. These factors were responsible for 30.1%. Therefore, effective programs will be necessary to enhance pain management by improving the self-efficacy and knowledge of pain in dementia patients.

• Journal of Internet of Things and Convergence
• /
• v.9 no.6
• /
• pp.63-73
• /
• 2023

The purpose of this study is to identify the level of learning flow, learning satisfaction, academic self-efficacy, academic achievement, and academic stress of nursing students who experienced non-face-to-face online lectures, and to investigate the correlation between variables and the factors affecting academic stress. The data of this study was collected from 143 students at a nursing college in Seoul, through a Google online questionnaire from September 1, 2023 to September 25, 2023, and descriptive statistics, Student's t-test, analysis of variance, Pearson's Correlation, and linear multiple regression were conducted using SPSS Statistics 25.0. Following an analysis of the difference according to general characteristics, academic stress showed significant difference according to Motivation for applying to department(F=4.465, p=.005) and Major satisfaction(F=36.499, p=.000) of the subjects. The result of analyzing the correlation academic stress was negatively correlated with learning flow (r=-.464, p<.010), academic self-efficacy (r=-.522, p<.010), and academic achievement (r=-.379, p<.010), but learning satisfaction was not correlated with academic stress. Variables affecting academic stress were major satisfaction (𝛽=.367, p<.01), learning flow (𝛽=-.186, p<.05), and academic self-efficacy (𝛽=-.241, p<.05), and the explanatory power for academic stress was 40%. The results of this study can be used as basic data for intervention programs for relieving academic stress of nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.12
• /
• pp.8284-8291
• /
• 2015

The purpose of this study is to explore degree of nursing student's mental health and the factors influencing mental health of those surveyed. A total of 186 nursing student B, C city were surveyed. All of this data is analyzed by using t-test, ANOVA, Pearson's correlation coefficients, multiple regression analysis with SPSS WIN/18.0. The results were as fallows. The mean score for Mental health was $2.25{\pm}0.65$. There were negative correlation between Mental health and self-efficacy(r=-434, p<.001), social support(r=-.393, p<.001). Regression analysis showed 24.7% of variance in nursing student's mental health can by experience of dating with self-efficacy and social support. The fallow-up survey about various factors influencing nursing student's mental health is needed and mental health increasing education and program developing are required.

• The Journal of the Convergence on Culture Technology
• /
• v.7 no.1
• /
• pp.487-495
• /
• 2021

Using self-regulation learning strategies that can cultivate the creative and critical thinking required in the era of the Fourth Industrial Revolution, it was applied to the exploration experimental class of the section 'quantitative relationship in chemical reactions' in high school chemistry and the effects on academic performance and scientific attitudes were analyzed. In case of academic achievement, although there was no meaningful difference between the two groups in the pre-test, the average value of the experimental group was significantly higher in the post-test. In the case of scientific attitudes, the difference in average points between the two groups was the greatest in readiness and curiosity. In the post-test of the experimental group, academic achievement showed the highest correlation with meta-cognition and scientific attitude with behavioral regulation, respectively. Considering the effectiveness of metacognition and scientific attitudes, self-regulation learning strategies are the most suitable teaching-learning forms for creativity and personality education in this era.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 1997.10a
• /
• pp.560-563
• /
• 1997

Sound intensity method is well known as a visualization technique of sound field and sound propagation in noise control. Sound intensity is a vector quantity that describes the magnitude and the direction of net flow of acoustic energy at a given position. The current measuring method is expensive and difficult to identify the noise source exactly. In this paper, we have studied the noise source identification and the characteristics of noise source of rotary compressor for air conditioner using complex sound intensity method. The new method for instantaneous sound intensity is also proposed and it is useful for transient state and steady state. The criteria of these states select auto correlation coefficient. The advantage, simplicity and economic attribution of this method are verified by analyzing the characteristics of noise source with instantaneous sound intensity compared to mean sound intensity.

• Proceedings of the KSME Conference
• /
• 2000.04b
• /
• pp.692-697
• /
• 2000

In Particle Tracking Velocimetry, the analysis of double-exposed photographic plate can be carried out either by means of Young's fringe analysis or by a digital image processing technique. In this study, we used digital image processing to two images in one frame far analyzing in-cylinder flow fields, and compared PTV with PSV(Particle Streak Velocimetry). Additionally, this technique was verified by two different calibration method. One is interpolation by invert distance, the other is interpolation by area ratio. Finally, the results between two interpolation methods were similar in whole flow fields.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2003.05a
• /
• pp.960-963
• /
• 2003

Sound intensity method is well known as a visualization technique of sound field and sound propagation in noise control. Sound intensity is a vector quantity that describes the magnitude and the direction of net flow of acoustic energy at a given position. The current measuring method is expensive and difficult to identify the noise source exactly. In this paper, we have studied the noise source identification and the characteristics of noise source of rotary compressor for air conditioner using complex sound intensity method. The new method for instantaneous sound intensity is also proposed and it is useful for transient state and steady state. The criteria of these state, select auto correlation coefficient. The advantage, simplicity and economic attribution of this method are verified by analyzing the characteristics of noise source with instantaneous sound intensity compared to mean sound intensity.