• Communications for Statistical Applications and Methods
• /
• 제10권2호
• /
• pp.507-517
• /
• 2003

Self-organizing map (SOM) has been developed mainly by T. Kohonen and his colleagues as a unsupervised learning neural network. Because of its topological ordering property, SOM is known to be very useful in pattern recognition and text information retrieval areas. Recently, data miners use Kohonen´s mapping method frequently in exploratory analyses of large data sets. One problem facing SOM builder is that there exists no sensible criterion for evaluating goodness-of-fit of the map at hand. In this short communication, we propose valid evaluation procedures for the Kohonen SOM of any size. The methods can be used in selecting the best map among several candidates.

• 대한기계학회논문집
• /
• 제18권8호
• /
• pp.1939-1951
• /
• 1994

This study introduces a new tool breakage detecting technology comprised of an unsupervised neural network combined with adaptive time series autoregressive(AR) model where parameters are estimated recursively at each sampling instant using a parameter adaptation algorithm based on an RLS(Recursive Least Square). Experiment indicates that AR parameters are good features for tool breakage, therefore it can be detected by tracking the evolution of the AR parameters during milling process. an ART 2(Adaptive Resonance Theory 2) neural network is used for clustering of tool states using these parameters and the network is capable of self organizing without supervised learning. This system operates successfully under the wide range of cutting conditions without a priori knowledge of the process, with fast monitoring time.

• 기본간호학회지
• /
• 제16권2호
• /
• pp.134-143
• /
• 2009

Purpose: This study was conducted to determine the predictors of health conservation for elders in Korea. Method: Random sampling method was used and data from 113 elders were used for final analysis. Data collection was conducted through the use of questionnaires which were constructed to include Health Conservation Scale, Purpose in Life Test and Self-efficacy Scale. Results: Health conservation of the elders was in the middle range. The elders of this study had few goals towards meaning in life, and were in an existential vacuum state. There was a positive correlation between health conservation, meaning in life and self-efficacy. The significant factors influencing health conservation of elders were meaning in life, education level and gender. These 3 factors explained 30.6% of health conservation of elders. Conclusions: The results indicate that health conservation is an important link with meaning in life in elders. There should be a comprehensive study in the future for in-depth understanding of health conservation of elders.

• Advances in nano research
• /
• 제13권2호
• /
• pp.175-186
• /
• 2022

This study is a randomized pretest-posttest design that aims to investigate the effect of early entrepreneurship education on cognitive and non- early entrepreneurship education, non-cognitive skills, creativity, self-efficacy, Bizworld cognitive skills of male sixth-grade primary school students. A total of 45 students were selected by multi-stage random sampling method and were assigned randomly to experimental, active-control and control groups. The experimental group received entrepreneurship education based on the Bizworld entrepreneurship program. The results indicate that early entrepreneurship education had an effect on non-cognitive skills (such as risk taking propensity, creativity, self-efficacy, persistence and need for achievement. It seems that early entrepreneurship education is a proper strategy to develop children's non-cognitive skills in late years of primary school. These skills will affect children's individual, educational, social and occupational future and can have long term benefits for students, families and society.

• Journal of Information Technology Applications and Management
• /
• 제30권3호
• /
• pp.15-35
• /
• 2023

Considerable agreement exists about the importance of promoting entrepreneurship in both developed and developing countries. In less developed countries, governments see entrepreneurship as a way to stimulate economic development and tackle serious economic and social challenges. So how can countries encourage young people to become entrepreneurs? Research confirms that intentions play an important role in the decision to start a new firm and many factors influence that intentions. The purpose of the study was to investigate the antecedents to entrepreneurship behavior with particular attention to moderating role of social support and entrepreneur self-efficacy. The study covered 116 business students of undergraduate and post graduate level studying under different universities in Kathmandu, Nepal. The questionnaire for data collection was distributed in college groups via WhatsApp and viber with the support and permission from the college administration. The study design used was correlational with a sampling procedure of convenience. The study only showed the impact of attitude to entrepreneurship behavior as well as moderating effect of social support was also observed.

• Nutrition Research and Practice
• /
• 제9권3호
• /
• pp.319-327
• /
• 2015

BACKGROUND/OBJECTIVES: In nutritional epidemiology, collecting self-reported respondent height and weight is a simpler procedure of data collection than taking measurements. The aim of this study was to compare self-reported and measured height and weight and to evaluate the possibility of using self-reported estimates in the assessment of nutritional status of elderly Poles aged 65 + years. SUBJECTS/METHODS: The research was carried out in elderly Poles aged 65 + years. Respondents were chosen using a quota sampling. The total sample numbered 394 participants and the sub-sample involved 102 participants. Self-reported weight (non-corrected self-reported weight; non-cSrW) and height estimates (non-corrected self-reported height; non-cSrH) were collected. The measurements of weight (measured weight; mW) and height (measured height; mH) were taken. Using multiple regression equations, the corrected self-reported weight (cSrW) and height (cSrH) estimates were calculated. RESULTS: Non-cSrH was higher than mH in men on average by 2.4 cm and in women on average by 2.3 cm. In comparison to mW, non-cSrW was higher in men on average by 0.7 kg, while in women no significant difference was found (mean difference of 0.4 kg). In comparison to mBMI, non-cSrBMI was lower on average by $0.6kg/m^2$ in men and $0.7kg/m^2$ in women. No differences were observed in overweight and obesity incidence when determined by mBMI (68% and 19%, respectively), non-cSrBMI (62% and 14%, respectively), cSrBMI (70% and 22%, respectively) and pcSrBMI (67% and 18%, respectively). CONCLUSIONS: Since the results showed that the estimated self-reported heights, weights and BMI were accurate, the assessment of overweight and obesity incidence was accurate as well. The use of self-reported height and weight in the nutritional status assessment of elderly Poles on a population level is therefore recommended. On an individual level, the use of regression equations is recommended to correct self-reported height, particularly in women.

• 한국산학기술학회논문지
• /
• 제19권10호
• /
• pp.368-376
• /
• 2018

본 연구는 청소년의 스포츠클럽 참여를 통한 몰입경험과 자아존중감 및 운동지속의도의 관계를 규명하여 청소년들이 운동을 지속할 수 있도록 하는데 목적이 있으며, 표집방법으로 비확률표본추출법 중 편의추출법을 이용하였고, 설문지의 총 257부를 자료분석에 사용하였다. 설문지는 Window용 SPSS 21.0 version 통계프로그램을 이용하여, 연구 대상자의 빈도분석, 요인분석, 상관관계분석, 다중회귀분석을 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 청소년의 인지몰입은 부정적 자아존중감에서 부적인 관계를, 긍정적 자아존중감에서는 정적인 관계를 나타났고, 경향성, 가능성에서 정적인 관계를 나타나고 있다. 행위몰입은 경향성, 가능성, 강화성에서 정적인 관계를 나타나고 있다. 둘째, 긍정적, 부정적 자아존중감은 행위몰입에서 정적인 영향을 미치는 것으로 나타났고, 인지몰입에서는 영향을 미치지 않는 것으로 나타났다. 셋째, 강화성은 행위몰입에서 정적인 영향을 미치는 것으로 나타났고, 경향성, 가능성은 영향을 미치지 않는 것으로 나타났다. 청소년의 스포츠클럽 참여에 따른 몰입경험을 파악하고, 청소년들에게 보다 적합한 신체활동 정보를 제공함으로써 자아존중감을 높이고 지속적인 신체활동을 통해 건강체력 증진 및 활기찬 학교생활을 할 수 있을 것으로 사료된다.

• 한국산학기술학회논문지
• /
• 제17권12호
• /
• pp.170-185
• /
• 2016

이 연구는 체육고등학교 지도자의 비언어적 커뮤니케이션으로 인해 학생운동선수들의 감정반응 그리고 자기효능감과 어떤 관계가 있고 어떤 영향을 미치는지 분석하는 것에 목적이 있다. 연구의 대상자는 비확률 표본추출법 중 편의표본추출법을 이용하여, S시와 D시에 소재한 2개의 체육고등학교에 재학 중인 고등학교 체육특기생 258명을 표집 하였다. 총 184부를 분석하여 사용하였다. 분석 프로그램은 SPSS 22.0 프로그램과 22.0 AMOS를 이용하여 구조방정식모형을 분석하여 다음과 같은 결과를 얻었다. 첫째, 지도자의 비언어적 커뮤니케이션은 학생운동선수들의 감정반응에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 학생운동선수가 경험하는 감정반응은 자기효능감에 긍정적인 영향을 미치는 것으로 나타났다. 셋째, 지도자의 비언어적 커뮤니케이션은 학생운동선수들의 자기효능감에 직접적인 영향을 미치지 않는 것으로 나타났다. 넷째, 학생운동선수가 지도자의 비언어적 커뮤니케이션으로 인해 경험하는 감정적 반응은 자기효능감에 매개효과가 있는 것으로 나타났다. 다섯째, 비언어적 커뮤니케이션과 감정반응, 자기효능감 간의 관계에서 성별, 운동경력별로 조절효과가 없는 것으로 나타났다.

• 한국융합학회논문지
• /
• 제11권11호
• /
• pp.89-94
• /
• 2020

자기공명영상 고주파를 차단할 수 있는 금속물질 중 자장에 영향을 받지 않으며 가격이 저렴하고 주위에서 쉽게 구할 수 있는 알루미늄 호일을 이용하여 차폐체를 제작하였다. Phantom 실험 결과 over-sampling 기법을 적용한 경우 적용 전보다 aliasing artifact가 약 94% 감소하였고, 알루미늄 차폐체를 적용한 경우도 적용 전 보다 약 92% 감소하였다. 그리고 scan time도 over-sampling 기법의 경우 적용 전보다 약 3배이상 증가한 반면, 알루미늄 차폐체의 경우는 적용 전과 변화가 없는 것으로 나타났다. 따라서 알루미늄 호일을 이용한 차폐체도 기존의 흡수재 및 차폐체들과 마찬가지로 scan time의 증가 없이 aliasing artifact를 효율적으로 제거할 수 있는 것을 확인하였다.

• 한국컴퓨터정보학회논문지
• /
• 제23권8호
• /
• pp.107-114
• /
• 2018

This study was conducted for the purpose of examining the effects of team trust element of rugby players on self-determination motive and team performance. As for the study subjects, rugby players participated in the 97th national athletic meet in 2016 were selected. As for data collection, in the total of 221 copies of samples were collected through convenience sampling method and 182 copies were used for the final analysis. Using SPSS 18.0, the collected data were analyzed through frequency analysis, exploratory factor analysis, Cronbach's ${\alpha}$ test, correlation analysis and multiple regression analysis and the following conclusions have been obtained. First, as for the effects of rugby players' team trust element on self-determination motive, it was found that team trust influenced external moderation, internal moderation, integrated moderation and identification moderation, and teammate trust influenced internal moderation, integrated moderation and identification moderation. Second, as for the effects of rugby players' team trust element on team performance, it was found that team trust and teammate trust influenced team performance. Third, as for the effects of rugby players' self-determination motive on team performance, it was found that integrated moderation and internal moderation influenced team performance.