• 한국직업건강간호학회지
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• 제6권1호
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• pp.53-71
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• 1997

Across sectional study was performed to evaluate the chronic effects on central nerve system(CNS) of cumulative exposure of complex organic solvents, using neurobehavioral test. Subjects were 66 (male) dock yard painters of some large ship industry which is located in Ulsan. The neurobehavioral test battery used in this study was NCTB (Neurabehavioral Core Test Battery recommended by WHO(World Health Organization), which consisted of 7 items-Profile of mood states (POMS), Simple reaction time, Santa Ana dexterity test. Digit span, Digit symbol, Benton visual retention test and Pursuit aiming. The subjects were classified by 3 groups according to duration of employment(group 1 ; less than 9 years, group 2 ; 10-14 years, group 3 ; more than 15 years). The results of performance were analyzed considering of work duration, age, educational level, alcohol drinking, smoking and testing time as confounding factors. Benton visual retention test, pursuit aiming correct dot and sum of dot showed significant differences among the groups, and decreased with increasing work duration. It indicated that the mean scores of performance ability were lowering according to work duration. Besides, the tests that didn't show statistical significances but showed linear trends were depression-dejection, vigor, fatigue of POMS, slowest time of simple reaction time and digit span forward. Most of the neurobehavioral test items were correlated with age and educational level. After controlling of confounding factors-age and educational level, the results followed ; digit span backward was different significantly. Tension-anxiety, depression-dejection, anger-hostility of POMS, SD and slowest time of simple reaction time, Santa Ana dexterity test non-preferred hand, digit span forward, Benton visual retention test and pursuit aiming correct dot decreased with increasing of work duration. The correlation analysis was done in order to find out the relationship between subjective symptom and the scores of neurobehavioral core test battery. According to the results of analysis there were no items that had statistical significant relationship(p<0.05).

• 한국콘텐츠학회논문지
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• 제10권5호
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• pp.325-332
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• 2010

본 연구의 목적은 뇌졸중 후 발생하는 강직을 평가하는데 사용되는 진자검사에서 세 가지 정량적 측정값 사이의 상관관계를 알아보는 것이다. 세 가지 측정값은 이완 지수, 진동 횟수, 그리고 진동 시간이다. 뇌졸중 환자 26명이 본 연구에 참여하였고, 측정값들 사이의 상관관계를 검증하기 위하여 피어슨 상관계수를 사용하였다. 본 연구의 결과 이완 지수와 진동 횟수 사이에서 통계적으로 유의한 양적 상관관계를 보였다(r=.881, p<.01). 또한 이완 지수와 진동 시간 사이에서도 유의한 양적 상관관계를 보였으며(r=.896, p<.01), 진동 횟수와 진동 시간 사이에서도 유의한 양적 상관관계를 보였다(r=.938, p<.01). 진자검사를 통한 강직의 정량적 측정치인 진동 횟수와 진동 시간은 복잡한 계산 과정을 통해 구해지는 이완 지수보다 비교적 쉽고 간단히 구할 수 있다. 따라서 간단하면서도 객관적인 측정값으로서 진자검사의 진동 횟수와 진동 시간의 사용이 향후 임상에서 강직의 정량적인 측정방법으로 유용할 것으로 사료된다.

• 한국콘텐츠학회논문지
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• 제8권9호
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• pp.66-73
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• 2008

본 논문은 변화하는 방송환경 속에서 텔레비전 영상제작기법은 시청률과 어떤 상관관계를 가지고 있는지를 알아보고자 하는 목적으로 출발하였다. 그 중에서 특히 가장 높은 시청률을 기록하고 있는 텔레비전 장르인 드라마에서의 영상제작기법과 시청률의 상관관계를 분석하였다. 본 연구를 위하여 TNS미디어 코리아의 2007년 시청률 톱 100 자료를 바탕으로 사극과 폭력적인 드라마를 제외하고, 홈드라마 중에서 6편을 표본으로 선정하였다. 영상분석을 위해서 방송사 홈페이지의 드라마 다시보기와 대본보기를 통해 영상의 화면의 크기와, 카메라워크를 분석하고, 샷의 평균지속시간, 장면의 평균지속시간 등을 산출하였다. 이들 영상분석 자료를 대상으로 상관분석을 실시한 결과, <시청률>은 <복합적 카메라워크>와 <샷의 평균 지속시간> 과 부적인 상관관계가 있으며, 그 관계는 매우 밀접한 것으로 드러났다. 그리고 여타의 다른 변인들과는 상관관계가 없음이 밝혀졌다. 이러한 결과는 텔레비전 드라마의 시청률을 높이기 위해서는 2가지 이상의 카메라워크가 결합된 복합적 카메라워크를 줄이고, 샷의 지속시간을 짧게 제작하는 것이 바람직하다는 것을 말해준다.

• 말소리와 음성과학
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• 제7권4호
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• pp.103-110
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• 2015

The purpose of this study is to assess the vowel property by examining the vowel duration of the American English vowles found in the Buckeye corpus[6]. The vowel durations were analyzed in terms of various linguistic factors including the number of syllables of the word containing the vowel, the location of the vowel in a word, types of stress, function versus content word, the word frequency in the corpus and the speech rate calculated from the three consecutive words. The findings from this work agreed mostly with those from earlier studies, but with some exceptions. The relationship between the speech rate and the vowel duration proved non-linear.

• Communications for Statistical Applications and Methods
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• 제16권1호
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• pp.21-29
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• 2009

Engle과 Russell (1998)의 ACD 모형은 재무학에서 가격과 거래 시간의 밀접한 관계에 대한 관심을 불러 일으켰다. ACD 모형은 GARCH 모형과의 유사성을 바탕으로 Box-Cox 변환과 충격 함수 곡선(shocks impact curve)을 적용시켜 Log ACD, Power ACD, Box-Cox ACD 등과 같은 보다 유연한 모형으로 일반화될 수 있다. 본 연구에서는 이와 같이 일반화된 ACD 모형들을 국내 주식시장에서 거래되고 있는 주식의 price duration에 적용시켜 그 성능을 비교해보고자 한다.

• 말소리와 음성과학
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• 제4권2호
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• pp.61-70
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• 2012

The current study observes the durational interaction of tautosyllabic consonants and vowels in the word-initial position of English and Korean child-directed speech (CDS). The effect of phonological laryngeal contrasts in stops on the following vowel duration, and the effect of the intrinsic vowel duration on the release duration of preceding stops in addition to the acoustic realization of the contrastive segments are explored in different prosodic contexts - phrase-initial/medial, focal accented/non-focused - in a marked speech style of CDS. A trade-off relationship between Voice Onset Time (VOT), as consonant release duration, and voicing phonation time, as vowel duration, reported from adult-to-adult speech, and patterns of durational variability are investigated in CDS of two languages with different linguistic rhythms, under systematically controlled prosodic contexts. Speech data were collected from four native English mothers and four native Korean mothers who were talking to their one-word staged infants. In addition to the acoustic measurements, the transformed delta measure is employed as a variability index of individual tokens. Results confirm the durational correlation between prevocalic consonants and following vowels. The interaction is revealed in a compensatory pattern such as longer VOTs followed by shorter vowel durations in both languages. An asymmetry is found in CV interaction in that the effect of consonant on vowel duration is greater than the VOT differences induced by the vowel. Prosodic effects are found such that the acoustic difference is enhanced between the contrastive segments under focal accent, supporting the paradigmatic strengthening effect. Positional variation, however, does not show any systematic effects on the variations of the measured acoustic quantities. Overall vowel duration and syllable duration are longer in English tokens but involve less variability across the prosodic variations. The constancy of syllable duration, therefore, is not found to be more strongly sustained in Korean CDS. The stylistic variation is discussed in relation to the listener under linguistic development in CDS.

• Journal of Preventive Medicine and Public Health
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• 제55권2호
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• pp.173-181
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• 2022

Objectives: Anxiety disorder is among the most prevalent mental illnesses among adolescents. Early detection and proper treatment are important for preventing sequelae such as suicide and substance use disorder. Studies have suggested that sleep duration is associated with anxiety disorder in adolescents. In the present study, we investigated the association between sleep quality and anxiety in a nationally representative sample of Korean adolescents. Methods: This cross-sectional study was conducted using data from the 2020 Korea Youth Risk Behavior Web-based Survey. The Generalized Anxiety Disorder-7 questionnaire was used to evaluate anxiety. The chi-square test was used to investigate and compare the general characteristics of the study population, and multiple logistic regression analysis was used to analyze the relationship between sleep quality and anxiety. Results: In both sexes, anxiety was highly prevalent in participants with poor sleep quality (adjusted odds ratio [aOR], 1.56; 95% confidence interval [CI], 1.43 to 1.71 in boys; aOR, 1.30; 95% CI, 1.19 to 1.42 in girls). Regardless of sleep duration, participants with poor sleep quality showed a high aOR for anxiety. Conclusions: This study identified a consistent relationship between sleep quality and anxiety in Korean adolescents regardless of sleep duration.

• 간호행정학회지
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• 제12권2호
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• pp.295-304
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• 2006

Purpose: The purpose of this study was to investigate the organizational citizenship behaviors(OCB) of nurses through identifying the relationship between the personal characteristics, occupational characteristics and OCB in nursing organization. Method: The subjects of this study were 223 clinical nurses. The structured questionnaires were used to collect the data. The data were analyzed using descriptive analysis, t-test, one-way ANOVA, Scheffe' test, Pearson correlation and stepwise multiple regression analysis by SPSS version 10. Results: The mean of OCB was $5.21{\pm}.59$. The OCB had statistically significant differences according to age(F=1.706, p=.007), tenure duration (F=3.450, p=.009), choice of nursing department(t=1.651, p=.000), marriage(t=2.341, p=.020) and religion(F=2.578, p=.038). The OCB was positively correlated with high-level need(r=.303, p=.000), neuroticism(r=.155, p=.020), task interdependence(r=.433, p=.000), age(r=.172, p=.010) and tenure duration(r=.190, p=.004); negatively with cynicism (r=-.310, p=.000). The task interdependence(18.7%), cynicism(7.7%) and tenure duration(1.9%) explained 28.3% of the variance for OCB in nursing organization. Conclusion: It is necessary to enhance the task interdependence, increase tenure and understand the characteristics of nurses to increase the OCB in clinical nurses. Nurse manager should be understand the positive influence of OCB on the task outputs in the hospital.

• Human Ecology Research
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• 제57권2호
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• pp.281-293
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• 2019

This study aimed to examine the effects of socially prescribed perfectionism, sleep duration, and sleep quality on suicidal ideation in Korean high school students and to investigate if sleep duration and quality moderated the relationship between socially prescribed perfectionism and suicidal ideation. The participants of this study were 840 students (544 boys and 296 girls) from six high schools located in Seoul and Gyeonggi-do. The Suicidal Ideation Questionnaire (Reynolds, 1988) was used to measure suicidal ideation. And the socially prescribed perfectionism was assessed by the Multidimensional Perfectionism Scale (Hewitt & Flett, 1991). The students were asked to respond to a question regarding how long they slept a day as well as the Sleep Quality Scale (Yi, 2005). The data were analyzed with descriptive statistics and hierarchical regressions. The moderating effect of sleep duration and quality were investigated using the analysis procedures proposed by Baron and Kenny (1986). The results showed that the level of socially prescribed perfectionism and sleep quality increased the level of suicidal ideation. In addition, sleep quality moderated the relationship between socially prescribed perfectionism and suicidal ideation. The effect of socially prescribed perfectionism on suicidal ideation was greater when sleep quality was poor, compared to when it was good.

• 음성과학
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• 제7권4호
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• pp.93-105
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• 2000

The English schwa sound has special characteristics which are distinct from other vowels. It is non-phonemic and occurs only in an unstressed syllable. Compared with the English schwa, the Korean /e/ is a full vowel which has phonemic contrast. This paper had three aims. One was to see whether there is any relationship between English full vowels and their reduced vowel schwas. Second was to see whether there is any possible target in the English schwa sounds which are derived from different full vowels. The third was to compare the English non-phoneme vowel schwa and the Korean full vowel /e/ in terms of articulatory positions and duration. The study results showed that there is no relationship between each of the full vowels and its schwa. The schwa tended to converge into a possible target which was F1 456 and F2 1560. The Korean vowel /e/ seemed to have its distinct position speaker-individual which is different from the neutral tongue position. The evidence that the Korean /e/ is a back vowel was supported by the Seoul dialect speaker. In duration, the English schwa was much shorter than the full vowels, but there was no significant difference in length between the Korean /e/ and other Korean vowels.