• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2007년도 춘계학술대회논문집
• /
• pp.1027-1032
• /
• 2007

For the description of the elastic properties of linear objects a convenient parameter is the ratio of the stress to the strain, a parameter called the Young's modulus of the material. Young's modulus can be used to predict the elongation or compression of an object as long as the stress is less than the yield strength of the material. Conventional method for estimating Young's modulus measured the ratio of stress to corresponding strain below the proportional limit of a material using a tensile testing machine. But the method needs precision specimens and expensive equipment. In this paper, we proposed method for estimating Young's modulus using accelerometer. The basic idea comes from that the wave velocity is different as the Young's modulus. To obtain Young's modulus, a group velocity is obtained. It is difficult to measure group velocity. This is because plate medium has a dispersive characteristics which has different wave speed as frequency. In this paper, we used Wigner-Ville distribution to measure group velocity. To verify the proposed method, steel and acryl plate experiments have been performed. Experimental results show that the proposed method is powerful for estimating Young's modulus.

• Asian-Australasian Journal of Animal Sciences
• /
• 제10권4호
• /
• pp.416-421
• /
• 1997

The effect of imported young bulls on the genetic progress was examined in the Holstein dairy cattle population in Japan. The effect of the difference of mean genetic merit between imported and domestic young bulls ("genetic difference") was recognized on the genetic progress of the domestic animals in the early stage of selection. On the other hand, the genetic progress of domestic animals were remarkably influenced by the genetic trend of imported young bulls ("genetic trend") in the later stage. Import of young bulls originated from high genetic level of young bulls originated from high genetic level population improved the genetic progress of domestic population. But, the increase of the immigration ratio of imported young bulls ("immigration ratio") did not influence linearly on the progress of the genetic merit of domestic animals. Even if "immigration ratio" was 100%, the genetic merit of domestic animals could not overcome the one of imported young bulls. In the later stage of selection, the genetic merit of domestic animals ran parallel to those of imported young bulls.

• 한국비블리아학회지
• /
• 제21권2호
• /
• pp.39-56
• /
• 2010

이 연구는 공공도서관 청소년 프로그램의 현황을 조사하여 문제점을 분석하고 개선 과제를 탐색하였다. 1개 특별시와 6개 광역시의 공공도서관 중 2009년 8월 31부터 9월 4일까지 청소년 프로그램이 실시된 86개관을 대상으로 조사하였다. 이 연구에서는 청소년프로그램을 참여형, 체험형, 강좌형, 콘테스트형, 기관협력형 등 5가지 유형으로 구분하여 각 유형별 특성과 문제점을 분석하였다. 그리고 공공도서관의 청소년 프로그램의 활성화를 저해하는 제반 환경적 문제를 점검하고 발전 방안을 제안하였다.

• 현장농수산연구지
• /
• 제24권2호
• /
• pp.29-38
• /
• 2022

The purpose of this study is to understand the importance-satisfaction level for the improvement of the young farmers fostering support policy. According to the analysis result, the respondents answered that the current policy to foster young farmers is important. However, the actual satisfaction level of the project was found to be lower than the importance level. In the 'Keep up the Good Work' area, which is the first quadrant, 'a project to support young succession farmers and settling in farming' and 'a project to select and support succeeding agricultural managers'. It was found that the respondents highly evaluated the importance and satisfaction of the 'Young Succession Farmers Selection and Farm Settlement Support Project' and the 'Succession Farmers Selection and Support Project'. Therefore, it is necessary to gradually expand the project in the future.

• 영재교육연구
• /
• 제19권2호
• /
• pp.241-260
• /
• 2009

본 연구에서는 유아영재 51명과 일반유아 51명을 대상으로 한국판 K-ABC의 프로파일을 분석하고 비교하였다. 유아영재와 일반유아의 K-ABC 프로파일을 분석하여 비교하기 위해 상관분석과 교차분석을 실시하였으며 연구결과는 다음과 같다. 첫째, 일반유아의 경우는 얼굴기억 검사를 제외한 모든 인지처리 하위검사들이 인지 처리과정척도와 정적상관이 유의하였으나 유아영재의 경우는 손동작, 수회생, 얼굴기억, 위치기억검사와의 상관만이 통계적으로 유의하였다. 유아영재의 경우, 인지처리 과정척도와 습득도척도와 유의한 상관이 없었으나 일반유아는 습득도 척도와 유의한 정적 상관이 있는 것으로 나타났다. 둘째, 유아영재와 일반유아의 인지처리 하위검사와 습득도 하위검사의 강점과 약점에 차이가 있을 것인지를 살펴본 결과, 모든 하위 검사에서 통계적으로 유의한 차이가 없는 것으로 나타났다. 셋째, 유아영재와 일반영재의 K-ABC종합척도 프로파일을 비교한 결과, 순차처리 동시처리 척도간의 비교와 동시처리척도 습득도척도간의 비교에서는 유의한 차이가 없었으나 유아영재는 습득도 척도에 비해 순차처리척도와 인지처리과정척도의 접수가 높은 경우가 일반유아에 비해 보다 더 많은 것으로 나타났다.

• Human Ecology Research
• /
• 제58권3호
• /
• pp.299-313
• /
• 2020

This study investigated the relationship among fathers' parenting involvement, mothers' parenting competence, and young children's self-control. Participants consisted of 325 mothers and young children (169 boys and 153 girls) from the Seoul area who completed questionnaires on fathers' parenting involvement, mothers' parenting competence, and young children's self-control. Data were statistically analyzed using basic descriptive statistics, Pearson's correlation, and multiple regression analysis. Baron and Kenny's method was examined. Subsequently, the Sobel test was performed to check the mediating model's significance and was adapted to SPSS version 21.0 for Windows. The major findings were as follows. First, fathers' parenting involvement was positively correlated with young children's self-control and mothers' parenting competence. Second, mothers' parenting competence was positively correlated with young children's self-control. The mothers' parenting competence indicated a tendency to play a perfectly/partially play a mediating role between fathers' parenting involvement and young children's self-control; consequently, a fathers' parenting involvement had a direct effect as well as an indirect effect through the mothers' parenting competence on young children's self-control. The results indicated that a mothers' parenting competence plays a crucial role in the relationship between a fathers' parenting involvement and the young children's self-control.

• 농촌지도와개발
• /
• 제25권3호
• /
• pp.161-173
• /
• 2018

The study aims to explore the policy directions for young farmers within Korean agricultural context, particularly in Chung-nam Province. In order to accomplish this, young farmers were classified into three categories: successors, new farmers, potential farmers. The importance of young farmers is becoming more of a focus due to decline of population numbers in rural communities as well as the aging of agriculture population. In order to address these two problems, it is necessary to create and implement policy to support each category of young farmer. Rather than the current focus on nurturing young farmers as a labor force, the role of young farmers in maintaining local communities should be expanded in current agricultural system. The local community should provide appropriate conditions for young farmers in Chung-nam Province for the various purposes they have and the roles they fill. In conclusion, it is necessary to provide a 'space' where young farmers can meet base on the community. For this, the role of the community based intermediate support organization for the integrated support system is of great significance.

• 농촌계획
• /
• 제27권2호
• /
• pp.59-67
• /
• 2021

In the meantime, the government has implemented various policies for young farmers at a time when the number of people in charge of agriculture and rural areas is decreasing, but it is difficult to secure a stable agricultural workforce. This study analyzed the mediating effect of family support in the will to self-reliance and farming continuation for young farmers at a time when agricultural and rural farmers are decreasing and aging. According to the analysis, young farmers are young, highly educated, have short farming experience, and mainly livestock and gardening were high. In addition, it was found that the will of young farmers to stand on their own feet influenced the sustainability of young farmers by partially selling their family support. The main implications are the need for support or support for internal growth of young farmers and the need for continuous family support. It was also understood that young farmers should have the will to stand on their own feet in order to have continuous and satisfactory farming results.

• 융합경영연구
• /
• 제9권6호
• /
• pp.15-24
• /
• 2021

Purpose: The purpose of this study is to analyze the residential environment satisfaction of young women's one-person households and the characteristics of young one-person households, and to present policy implications for their housing problems. Research design, data, and methodology: This study used 11th Korea Financial Panel Data. Analysis methods in this study include basic statistical analysis, frequency analysis, multiple regression analysis, and artificial neural network analysis. Results: As a result of the analysis of this study, 1) young one-person households showed that women had higher ratios of non-regular workers, real estate debt than men, and lower average income. The percentage of young people owning their own homes was very low at about 5%. 2) For young women, the higher the education level and monthly consumption, the lower the housing satisfaction. 3) Young women living in rental housing had lower housing satisfaction than their own. Conclusions: Women are paying more for housing security than men in young one-person households. In addition, the proportion of their own houses is very low. Therefore, there is a need for a policy on the housing safety issue of young women's one-person households. And policies to support young one-person households to own their own homes are required.

• Journal of health informatics and statistics
• /
• 제43권4호
• /
• pp.282-289
• /
• 2018

Objectives: The purpose of this study was to investigate factors related to nutrients intakes among young children aged 1-5 years and their mothers. Methods: The study subjects were 621 young children and their mothers from the data of 2nd year (2014) and 3rd year (2015) of the 6th National Health and Nutrition Survey. To find a difference of Recommended Nutrient Intake in young children and their mothers, independent t-test, ANOVA, and Duncan test as a post-hoc analysis were used. For the factors influencing young children Recommended Nutrient Intakes, hierarchical multiple regression analysis was used. Results: The mean score of Recommended Nutrient Intakes was $6.92{\pm}2.17$ in young children and $4.74{\pm}2.06$ in mothers. The Recommended Nutrient Intakes of young children was increased according to gender (boy) (p=0.001), increasing young children age ($p{\leq}0.001$), young children breakfast frequency (p<0.001), mothers age (p<0.001), education level (p=0.020) and mothers lunch frequency (p=0.002) and family income (p=0.007). The Recommended Nutrient Intakes of mothers was increased according to their age (p=0.005), family income (p=0.020) and having breakfast (p=0.038). The factor that influenced young children Recommended Nutrient Intakes was their mothers Recommended Nutrient Intakes (${\beta}=0.21$, p<0.001). Conclusions: Given the results, it is necessary to establish a plan or nutrition education for young children's menu differently depending on their age and gender. Since mothers' Recommended Nutrient Intakes influence their young children's Recommended Nutrient Intakes, it is necessary to provide mothers' with nutrition education about the importance of mothers' nutrition management and right nutrient intakes, and to make customized nutrition education guidelines in consideration of mothers' characteristics.