• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2008년도 춘계 종합학술대회 논문집
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• pp.92-95
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• 2008

입력에서 특징을 추출하는 유용한 방법으로 NMF(Non-nagetive Matrix Factorization)이 제안되었다. NMF를 적용하면 고차원의 데이터가 저차원의 특징에 기반한 형태로 변형이 된다. 이 경우 클러스터링 효과도 같이 나타나는데, 최근에 Sparse NMF가 이러한 효과를 더 잘 보인다고 알려졌다. 이 논문에서는 숫자 영상 신호에 대하여 NMF와 Sparse NMF를 적용시켜 이러한 클러스터링 효과를 비교하여 보았다.

• 대한안전경영과학회지
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• 제24권1호
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• pp.39-48
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• 2022

Considering that previous works on safety behavior relatively have not paid adequate attention to the influence of various leadership styles on safety behavior. The current paper investigates the impact of authentic leadership on safety behavior and its intermediating mechanisms. In specific, this paper delves into the mediating effect of job stress, as well as the moderating effect of perspective taking ability of employees in the association between authentic leadership and job stress. The results demonstrated that that authentic leadership has a negative (-) influence on job stress, which has a negative (-) influence on safety behavior. Moreover, job stress mediated the association between authentic leadership and safety behavior. Furthermore, perspective taking moderated the authentic leadership-safety behavior link.

• International Journal of Internet, Broadcasting and Communication
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• 제15권4호
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• pp.61-73
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• 2023

As smartphone use is increasing within the middle-aged population, society should pay closer attention to the mental health problems associated with smartphone addiction. This study examines the possibility that depression, anxiety, and ADHD can be interpreted not only as negative aspects, but also as positive aspects, in an addiction-related individual. We used habitual and addictive smartphone behavior as the dependent variables; anxiety, ADHD, depression, and habitual smartphone use as the independent variables; and self-control as a moderating variable. Depression and ADHD in smartphone users were found to be associated with higher levels of addictive smartphone use. Anxiety was having negative effect on addictive smartphone use. However, habitual smartphone use didn't significantly affect addictive smartphone use. Further analysis indicated that depression, anxiety, and ADHD have mediating effects on habitual smartphone use. This study confirmed that psychological factors in adults, as well as habitual/addictive smartphone use and self-control, significantly influence smartphone overdependence.

• 가족자원경영과 정책
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• 제13권3호
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• pp.181-205
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• 2009

The purpose of this study is to investigate some Influencing factors related to the wealth perception and property increase of 519 women in Seoul. The research was conducted from the end of February 15 to the beginning of January 20, 2009. The figures obtained were analyzed by frequency, percentage, mean, x-test, t-test, F-test, chi-square, and Duncan's F-test with SPSS pc+ The major findings of who study are summarized as follows: l.There were significant differences between the wealth recognition (economic plan affirmative and negative perception of wealth) for women according to social and psychological variables; economic plans have a higher value for married women, older women, those who have followed a postgraduate university course, those with higher income and expenditure, higher life satisfaction, and high and middle satisfaction with their economic life. In particular, economic plans varied significantly according to expectation of wealth in old age, and future economic prospects in the middle group. 2. Increased wealth and economic according to social and psychological variables (marital status, age, education, income, expenditure, life satisfaction, satisfaction with economic life, expectation of wealth in old age, future economic prospects) were shown to be associated with the following methods of increasing property: use of savings banks (p<.001) showed a rate of deposit of 20%-40% (p<.001) saving and thrift was a practice (p<001) that was related to the cost of living; and education expenditure (p<.001) as a property preparation period was exhibited in women aged 25-30 (p<.001). 3. There were significant differences in the recognition of wealth according to strategies for increasing wealth. There were no significant differences between mean of property acquisition and point of expenditure or the property preparation period in the perception of wealth. The related variables in rate of deposits were under 20% according to economic plan and negative wealth perception. In contrast, in the middle and high group, the economic plan and negative wealth perception were 20%-40% in relation to the rate of deposits. Variables related to the action of saving and thrift and property acquisition were practiced in the low and middle group of affirmative wealth recognition and the high group of negative wealth perception. The high group for wealthrecognition and the low group for wealthnegation exhibited little savings, thrift, and property accumulation. Those variables which point an expenditure the cost of living were education expenditure in all groups of negative wealth perception. The women in the study practiced more soundness economic planning according to their increased wealth and economic strategy. This study suggests that women should have positive wealth perception in their lives.

• 한국콘텐츠학회논문지
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• 제22권3호
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• pp.197-211
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• 2022

본 연구는 부모의 긍정적 양육태도, 부정적 양육태도, 정서문제, 학습무기력 사이의 구조적 관계를 알아보는 것이다. 이를 위하여 한국아동·청소년패널조사 2018 중학교 1학년 2,590명의 데이터를 활용하여 변인들 사이의 구조적 관계를 파악하고자 하였다. 본 연구를 위하여 SPSS 21.0으로 변인간의 상관관계를 보았으며, AMOS 21.0으로 변인들 사이의 구조적 관계를 파악하였다. 연구결과는 다음과 같다. 첫째, 부모의 긍정적 양육태도와 부정적 양육태도는 학습무기력에 유의한 영향을 주는 것으로 나타났다. 둘째, 부모의 긍정적 양육태도와 부정적 양육태도는 정서문제에 유의한 영향을 주는 것으로 나타났다. 셋째, 정서문제는 학습무기력에 유의한 정적 영향을 미치는 것으로 나타났다. 넷째, 부모의 긍정적 양육태도, 부정적 양육태도와 학습무기력 사이에서 정서문제는 부분매개 하는 것으로 나타났다. 즉 부모의 양육태도에 영향을 받은 청소년의 정서는 그들의 학습에 영향을 주는 것이다. 본 연구를 통하여 그동안 정서문제를 단순히 다른 요인으로부터 영향을 받는 요인에 국한되는 것이 아닌, 학습에 영향을 주는 요인으로 다룰 수 있음을 확인하는데 의의가 있다.

• 생물정신의학
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• 제20권3호
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• pp.91-96
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• 2013

Objectives The aim of this study is to evaluate the association between rs6280 and rs905568 genetic polymorphism of DRD3 gene and the treatment response of amisulpride. Methods After six weeks treatment of amisulpride, 125 schizophrenia patients were interviewed based on the Positive and Negative Syndrome Scale (PANSS) and the Clinical Global Impression-Severity (CGI-S). The genotyping for rs6280 and rs905568 was performed using TaqMan single nucleotide polymorphism (SNP) genotyping assay. Results There was no significant difference in the frequency of genotype and allele of rs6280 between the responders and non-responders based on the total, positive, and general score of PANSS and CGI-S score. However, there was a significant association between this SNP and treatment response in the negative score of PANSS (${\chi}^2=5.23$, p = 0.022). There was no significant association between rs905568 and the response in positive, negative, general, and total PANSS score and CGI-S score. Conclusions This is the first positive association study between DRD3 gene and the treatment response of negative symptoms to amisulpride in Korean schizophrenia patients. A larger scale research on more SNP of the DRD3 gene will make a progress in the study of pharmacogenetics on the treatment response of the amisulpride.

• Asian-Australasian Journal of Animal Sciences
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• 제18권6호
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• pp.772-779
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• 2005

The objectives of this study were to examine problems with using F$_1$ data by simulation, association of marker loci and QTL from crosses of inbred parental lines and to enumerate the preliminary characterization of genetic superiority within inbred parental lines. In this study, the association between markers for QTL used as covariates and estimates of variance components due to effects of lines was investigated through computer simulation. The effects of size of population to develop inbred lines and initial frequencies and magnitudes of effects of QTL were also considered. Results show that estimates of variance components due to line effects are influenced by including marker information as covariates in the model for analysis. Estimates of line variance were increased by adding marker information into the analysis, because negative covariances between effects associated with the markers and the remaining effects associated with other loci existed. However, the fit of the model as indicated by the log likelihood improved by adding more markers as covariates into the analysis. Marker assisted selection will be beneficial when markers explain unexplained genetic difference during selection procedure. Markers can be used to identify QTLs affecting traits, and to select for favorable QTL alleles. To efficiently use genetic markers, location of markers at the genome must be identified. The estimates of variance due to effects of with and without marker information used as covariates in the analysis were investigated. The estimates of line variances were always increased when markers were included as covariates for the model because a negative covariance were existed.

• 보건교육건강증진학회지
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• 제13권1호
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• pp.28-44
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• 1996

The purpose of this study is to examine the associated risk factors for adolescent cigarette smoking. In February 1995, a total of 1793 students from 17 general high schools in Seoul were assessed with a self-completing questionnaire pertaining current smoking status and school.family.peer environmental factors. The results are as follows; 1. The overall proportion of current smoker among students in the study was 17.3%; 27.7% in males and 6.6% in females. 2. There was significant association between smoking status and all school environmental factors (ranks at school, satisfaction at school, study hours after school, extracurricular activity) examined. 3. Siblings smoking in males and family structure in females were significantly associated with the smoking status of students. 4. Functional aspect of family environmental factors, such as APGAR score, parental supervision, attachment to father or to mother were related to smoking status of students. 5. Association with friends who smoke was significantly associated with smoking status of students. 6. In males, association with friends who smoke, ranks at school, siblings smoking were significant positive predictors and APGAR score, parental supervision, attchment to mother were significant negative predictors. In females, association with friends whosmoke, ranks at school, satisfaction at school were significant positive predictors and parental supervision, attchment to father were significant negative predictors. These findings suggest that strategies that influence smoking behavior need to be directed not only to the individual student but also to their peer group, family and school environment.

• 한국간호교육학회지
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• 제25권1호
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• pp.125-135
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• 2019

Purpose: This study was conducted to determine the mediator effect of social support in the association between stress for college life and depression among nursing students. Methods: The participants of the study were 201 university students in A and C cities. Self-report questionnaires were used to measure the variables. In the data analysis, the SPSSWIN 25.0 program was utilized for descriptive statistics, Pearson's correlation, Sobel test and multiple regression analysis. Results: Mean scores of stress for college life, depression and social support were 2.56, 4.12 and 0.61, respectively. Stress for college life and depression showed a significant positive correlation (r=.60, p<.001), while depression and social support showed a significant negative correlation (r=-.46, p<.001). Lastly, stress for college life and social support showed a significant negative correlation (r=-.55, p<.001). The analysis of the mediator effect of social support in the association between stress for college life and depression showed that social support had a significant mediator effect. Conclusion: Among nursing students, social support may be a mediator in the association between stress for college life and depression. Therefore, strategies for nursing intervention to improve social support should be developed for nursing students.

• PNF and Movement
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• 제20권1호
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• pp.125-134
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• 2022

Purpose: The aim of this study was to establish an association between grip strength and gait variability in the elderly. Methods: The participants in this experiment (n = 20) were aged 65 or older. Power grip and lateral pinch forces were obtained in grip strength tests, and spatiotemporal gait parameters were collected from IMU sensors during 6 min actual walking to test the gait of participants. The collected gait parameters were converted to coefficient of variation (CV) values. To confirm the association between grip strength and gait variability, a partial correlation analysis was conducted in which height, weight, and gait speed were input as controlling variables. Results: Grip power showed a significant negative correlation with the stride length CV (r = -0.52), and the lateral pinch force showed a significant negative correlation with the stance CV (r = -0.65) and swing CV (r = -0.63). Conclusion: This study reveals that gait variability decreases as grip strength increases, although height, weight, and gait speed were controlled. Thus, grip strength testing, a simple aging evaluation method, can help identify unstable gait in older adults at risk of falling, and grip strength can be utilized as a non-invasive measurement method for frailty management and prevention.