• ALGAE
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• 제27권2호
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• pp.115-123
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• 2012

The establishment of algal spores plays an essential role in adult kelp distribution and abundance patterns. Sedimentation is a key variable regulating algal spore settlement and success, possibly controlling species-specific dominance $in$ $situ$. Laboratory experiments were used to determine spore attachment and survival rates of two Alaskan canopy-forming kelps, $Nereocystis$ $luetkeana$ (K. Mertens) Postels & Ruprecht and $Eualaria$ $fistulosa$ (Postels & Ruprecht) M. J. Wynne, to various types of sediment loading. Spore attachment for both species was significantly and similarly affected by three sediment treatments: suspended particles; settled sediment covering the substratum; and smothering of attached spores by settling sediment. Spore attachment decreased by approximately 90% at 420 mg sediment $L^{-1}$, the highest sediment load tested here, under all three treatments for both species. These results suggest that increases in sedimentation may constrain the success of the spore stages, but sediment does not seem to be a likely factor explaining species-specific distribution patterns. However, while sedimentation affected spores of both species similarly, timing of spore release in relation to times of maximum sediment load in the water might differ for different species, possibly explaining kelp species distribution patterns.

• 기술혁신연구
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• 제13권1호
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• pp.213-246
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• 2005

Despite of the impressive progress made in the Evolutionary techno-economics during the last two decades, there have been very little, if not at all, theoretical advancement in explaining an endogenous mechanism of transforming a technological paradigm within self-perpetuatingstructural dynamics. The question poorly attempted was raised by Schumpeter a century ago in his effort to overcome the well-known 'Walras' trap'. Although there have been increasing number of researchers recently tackling the issue quite seriously from within the Evolutionary school, I see it that radical reconstruction of the basic principle of Evolutionary research framework is urgently needed to solve the century long fundamental question, from evolutionary approach to transformational approach. In the paper, I will show the theoretical feasibility of explaining an endogenous mechanism of paradigm transformation, relying upon the concept of localized dynamics and the concept of morphogenetic structuration. It should be emphasized that there must be aendogenous process of deepening structural Instability generated in the process of economic coordination to secure efficient circular flow. The concept of development bottleneck initiated by the Baumol's cost disease could be regarded as one of the important source of such mechanism. Unfortunately, however, it is a brief conceptual description presented in the paper rather than a comprehensive analytical model, due to the space limitation imposed.

• 한국식품영양학회지
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• 제13권5호
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• pp.477-482
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• 2000

고분자 물질 용액에 감자 절편을 침지시의 탈수현상을 설명하기 위해 (1) 비정상 상태(unsteadystate)에서의 확산 식을 초기시간에 대해 단순화시킨 모델, (2) 침지시간별로 수분확산계수와 평균확산계수를 비교하여 탈수현상을 설명하고자 한 모델, (3) 물질이동에 대한 Fick의 제2법칙을 무한평판의 조건에서 전체 시간에 대해 전개한 모델 등 3가지 모델을 가정하여 검토한 결과 PEG용액에 감자절편을 침지했을 때 물질이동의 동력학적인 해석은 Fick의 제2법칙에 근거한 모델이 잘 적용되었으며 수분의 확산계수를 추정한 결과 8$\times$$10^{-7}$~4$\times$$10^{-6}$$ extrm{cm}^2$/s 범위였다.

• 지역사회간호학회지
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• 제25권4호
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• pp.248-258
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• 2014

Purpose: This study was to investigate factors influencing the Framingham risk score-Coronary heart disease (FRS-CHD) according to gender and body mass index (BMI) of adults who participated in the 5th Korea National Health and Nutrition Examination Survey (KNHANES V-3). Methods: This study used a cross-sectional design with secondary analysis with KNHANES V-3. The FRS-CHD scores were measured with ages, sex, blood pressure, cholesterol, high density lipoprotein, smoking, and diabetes mellitus. With demographic characteristics, family history of ischemic heart disease, types (intensity) and days of physical activities, perceived stress, drinking, menopause (in female), and BMI scores were measured. The data were analyzed with descriptive statistics, Pearson's correlation coefficients, and multiple regressions. Results: FRS-CHD was significantly associated with types (intensity) and days of physical activities, educational level, occupation, and marital status, explaining 19.1~76.8% of the variance in men. FRS-CHD was significantly associated with types (intensity) and days of physical activities, menopause, and education level, explaining 55.0~59.5% of the variance in women. Conclusion: Factors influencing FRS-CHD were significantly different according to gender and BMI. To reduce the risk of coronary artery disease, it is necessary to develop gender-specific physical activity programs according to BMI.

• 한국학교보건학회지
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• 제26권2호
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• pp.104-113
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• 2013

Purpose: The aim of this study was to investigate prevalence and ecological characteristics of excessive television viewing among elementary school students in Seoul. Methods: Secondary data, representative sample of 11,082 subjects in Seoul was used. After prevalence of the excessive television viewing was identified by using factor analysis, 6 main factors explaining the ecological indicators was founded. After identifying prevalence of the excessive television viewing, by using factor analysis, we found 6 main factors explaining the ecological indicators. After categorizing factors into socio-psychological and lifestyle characteristics, we were investigated the odds ratio of excessive television viewing per characteristics by using multiple logistic regression. Results: The prevalence of excessive television viewing was 29.7% among the elementary school student in Seoul. The prevalence were higher in male, higher grade, and non-South of the Han River. Socio-psychological indicators which expressed excessive television viewing were annoying or bullying, scolding from teacher, depressed mode, thought for a runaway from home, an experience of diet, and negative body image. Life style indicators were a lower intake of fruit and vegetables, a higher intake of Ramyun and soft drink, a worse life style of hand washing, and wearing safety equipment. Conclusion: Lifestyle of television viewing was the comprehensive results from family, school, and society rather than a personal preference. Therefore, it is necessary to educate the hazard of excessive television viewing, to reenforce the students' health competence, to activate a safe leisure program as an alternate of television viewing, and to develop a recommendation.

• 한국보육지원학회지
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• 제16권5호
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• pp.87-103
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• 2020

Objective: This study controlled the SES(Socio Economic Status) in order to compare the influence of infants' nonverbal communication ability and teachers' sensitivity on the infants' adjustment to child care centers. Methods: For this study, data was collected 115 mothers with one-year-olds'(58 boys, 57 girls) and from 115 teachers from fourty-eight child care centers located in Seoul and Gyeonggi Provincet data. The collected data were analyzed by correlation analysis, hierarchical multiple regression analysis using the SPSS 23.0 program. The results of this study are as follows. Results: First, infants' adjustment to child care centers showed a statistically significant relationship with infants' nonverbal communication ability and teachers' sensitivity. Second, among the variables explaining infants' adjustment to child care centers, the effect of teachers' sensitivity was higher than the effect of infants' nonverbal communication ability. Conclusion/Implications: This study confirmed that teachers' sensitivity is a strong factor explaining infants' adjustment to child care centers. We also emphasized the importance of the role of teachers, providing basic data on the development of education for child care teachers and education for improving sensitivity.

• 대한가정학회지
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• 제32권5호
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• pp.109-124
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• 1994

The present study was conducted to elucidate the relationship between parent's verbal control modes and children's social competency. Two questionanires were developed by the authors for this study. The questionnaire for measuring parent's verbal control modes was composed of 84 and 87 items for mother and father, respectively, which assesses three types of verbal control modes; imperative control position-oriented control and person-oriented control. The questionnaire for measuring children's social competency perceived by mothers was composed of 27 items, which assesses four areas of social competency; initiative sociability responsibility and self-disclosure. the subjects of this study were 436 mothers and their children of fifth and sixth grade in elementary schools located in Seoul. The results of this study were as follows: 1) Parents control their children mostly by position-oriented mode and least by imperative mode. 2) There were significant correlations between father's verbal control mode and children's social competency. children's social competency was related positively to the person-oriented and position-oriented modes but negatively to the imperative mode. The best variables explaining boy's social competency were father's imperative and position-oriented modes whereas that for girl's was position oriented mode. 3) Mother's verbal control mode was not significant in explaining children's social competency. 4) The negative impact of father's imperative mode in combination with the mother's person-oriented mode on the children's social competency was greater than other combinations of father's and mother's verbal control modes.

• 여성건강간호학회지
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• 제15권4호
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• pp.294-302
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• 2009

Purpose: This study was done to compare the level of parenting stress, entrapment, satisfaction of paternal support, and marital satisfaction between employed and non-employed mothers and to identify significant predictors for parenting stress. Methods: With a cross-sectional, correlational study design, a sample of study was consisted of 175 women who were employed or non-employed with preschool children through convenience sampling. Data were collected with a structured self-administered questionnaire and analyzed by $x^2$-test, t-test, Pearson's coefficients, and multiple regression analysis using SPSS program. Results: Results shows that the level of parenting stress of non-employed mothers was significant higher than that of employed mother. The parenting stress was negatively correlated to marital satisfaction and positively correlated to entrapment in both of them. Entrapment was significant predictors explaining parenting stress in both of them and level of maternal education and satisfaction of paternal support and was significant predictors explaining parenting stress of non-employed mothers. Conclusion: Entrapment was very important factors to management parenting stress of both employed and non-employed mothers. Especially, satisfaction of paternal support and marital satisfaction was very important factor to manage parenting stress of mothers.

• 한국의류학회지
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• 제26권2호
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• pp.216-226
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• 2002

This study attempts to understand how the perception of service quality as well as shopping motives influence on the emotional responses in store shopping, and to examine how these relevant variables influence on the store satisfaction. The 463 questionnaires were collected from the purchasers in department stores, fashion specialty stores, and national brand franchise stores. The results of this study are as fellows: 1. In regard to shopping motives, two dimensions of product motive and experiential motive were identified, explaining 47.39% of shopping motives. 2. In regard to emotional response, two dimensions of pleasure emotion and displeasure emotion were identified, explaining 65.95% of emotional responses. 3. Shopping motives led to the store satisfaction after the perception of service quality and then the experience of pleasure emotion. These related variables explained 60% of the store satisfaction. 4. The consumers of fashion specialty store showed the highest product motive, whereas the consumers of department stores showed the highest displeasure emotion in the store. As the results showed, customers' shopping motives influence their perception of service quality and pleasure emotion. Therefore, in order to stimulate shopping motives, the store environment that can give customers pleasure and opportunity to pursue various experiences should be provided. As the service quality is a very important variable that leads pleasure emotion in the store, sales persons should be trained to satisfy customers.

• The Journal of Korean Physical Therapy
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• 제18권1호
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• pp.83-94
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• 2006

Purpose: This study conducts quantitative evaluation or structural and functional characteristics or normal skeletal muscle with ultrasound image and surface electromyography, and is to provide basic materials for utilizing ultrasound image analysis in physical therapy diagnosis and assessment of skeletal muscle. Methods: Measurement of three stages was conducted with 88 normal adults between their twenties and seventies, correlations and differences using collected data according to age and gender were compared and correlations among measured items were analyzed and then the following conclusions were obtained. Results: Analysis of ultrasound image of normal skeletal muscle showed that density, median frequency had the closest relations with age. In addition, it was found that there were high correlations between density explaining structural characteristics of skeletal muscle and median frequency explaining functional characteristics. Conclusion: Analysis of ultrasound image makes complex evaluation of structure and function of skeletal muscle possible when it is connected with functional evaluation method using physical measurement surface electromyography as well as quantitative evaluation of structural changes of skeletal muscle and is effective in complementing physical therapy diagnosis centering around functionality evaluation.