• The Plant Pathology Journal
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• v.17 no.4
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• pp.227-230
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• 2001

Bioassay techniques using young leaves and roots were developed to screen resistance of Atractylis spp. against Phytophthora drechsleri. Among 638 plants collected from various regions of Korea from 1994 to 1996, 67 were pre-screened in fields naturally infested with P. drechsleri, which is the causal pathogen of rhizome rot of Atractylis. Among the pre-screened sources, 18 (ca. 26.8%) were highly resistant to the pathogen in leaf inoculation. In the root inoculation test, abundant sporangia were formed in susceptible plant roots, while only a few or no sporangia were produced on the roots which were found resistant in the leaf inoculation test. Among the selected resistant plants, A. japonica 96066 and 96104 were used to cross with another species, A. macrocephala 96362 that showed high yield with good quality of rhizome but susceptible to the pathogen. The F$_1$hybrids designated as HA03 turned out to be resistant to the pathogen, indicating that resistant gene(s) was inherited. Among intra-species hybrids of A. japonica, HA07 and HA09 were resistant to the pathogen in leaf inoculation and moderate in root inoculation. However, HA08 was susceptible in both inoculation tests. This result suggests that the parent material might be genetically heterogeneous. Further genetic study should be carried out to verify this phenomenon.

• Journal of Korean Public Health Nursing
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• v.21 no.2
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• pp.206-216
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• 2007

Purpose: The purpose of this study was to investigate the perceived social support of mothers with disabled children. Method: This study was a cross-sectional, descriptive study using a questionnaire survey which included the standardized measure: personal resource Questionnaire 2000. Results: The participants were 98 mothers, each with one with disabled children. Of the 98 participant's children, 39.8% suffered mental retardation, 34.7% was developmentally disability, 16.3% was brain diseases and 9.2% was multiple disabled. The mean age of the disabled children was 8.2 years and of their mothers was 38 years. The order of the life events for which the need help for the subjects required help were 'when anger and frustration arise happened', 'difficulties in human relationship' and 'emergency situations'. The personal resources were spouse (38.1%), friends (20.9%) and parent (12.9%). The mean score of perceived social support was 5.48 out of a total of 7, indicating a slightly high on social support score. Significant differences were found in the level of perceived social support according to the school grade of disabled child's school grade (F=4.04, p= .02) and the mother having a job presence of mothers (t=2.49, p= .01). Conclusion: These findings indicate a need for nursing intervention programs for mothers with disabled children, including anger management, methods of human relationship, support for leisure time and long term illness and providing information.

• Journal of Plant Biology
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• v.8 no.1_2
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• pp.11-18
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• 1965

Since Taquet's first discovery of wild P. yedoensis at Mt. Halla, Korea, in 1908, its morphological chracteristics and question of origin of cultivated yedoensis have given controversies to the botanists. Takenaka, through his experiments on the hybridity of cultivated P. yedoensis, recently holds the opinion that P. yedoensis might have originated in Izu peninsula, Japan. The author presents the summarized report on the wild P. yedoensis and its putative parents based on his 2 years' investigated carried out at Mt. Halla during his breeding experiment of genus Prunus. The species of cherry tree used in the present investigation were identified by Prof. Mankyu Park and Mr. Jonghyu Pu, Korean taxonomists. 1) Wild cherry trees which grow wild in Mt. Halla and whose blooming season is April are mostly P. subhirtella var. pendula form. ascendens and P. donarium P. yedoensis is rare in number, around 10 individuals, having been found in a half century. 2) Individuals of wild yedoensis are variable in some of their morphological characteristics. This is, also, true in other species of Prunus. 3) Wild yedoensis whose vigorous growth, sterility, and rarity in number suggest hybrid origin, has intermediate characteristics between the P. subhirtella and P. donarium. 4) Due to the abnormal weather of the island and various environmental factors such as havbitats, some of the early-blooming subhirtella and late-blooming donarium would bloom at the same time, giving these two species the changes to cross. 5) Wild yedoensis is slightly different in some of its quantitative characters from cultivated species.

• Journal of Korean Public Health Nursing
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• v.18 no.2
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• pp.218-224
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• 2004

This study was conducted to explain adolescents' smoking behavior using Health Belief Model. A cross-sectional study design was used to analyze characteristics and factors that influence smoking behavior among Korean adolescents. A total of 1.535 adolescents attending 21 high schools in one district of Seoul participated in the study. The results indicated that perceived susceptibility, severity, benefits, and barriers were significant in predicting smoking behavior of adolescents. Likewise, the degree of juvenile delinquency, gender, the amount of pocket money, and having smoking parent(s) and friend(s) significantly affect smoking behavior of adolescents. Based on the study results, it is recommended to incorporate HBM components in smoking cessation programs, and to include parents and friends in smoking prevention and cessation programs for high school students in Korea.

• Journal of Preventive Medicine and Public Health
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• v.36 no.2
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• pp.131-136
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• 2003

Objectives : The purpose of the present study was to explore a possible interaction effect of stress and social support on the smoking status and identify smoking related factors of high school students, Methods : A cross-sectional design was used for this study. A total of 1,251 high school students from Gyeonggi-do were selected using stratified-proportional random cluster sampling methods, The participants completed a set of questionnaires to measure their smoking status, stress, social support and sociodemographic information, The obtained data were analyzed using descriptive statistics, $x^2$-tests and hierarchical logistic regressions. Results : The interaction effect of stress and social support on smoking status was not supported. However, stress, sex, types of school, parent's smoking and friends' smoking were significantly predicted the smoking status of the high school students. Conclusions : In relation to the prevention of adolescents' smoking, it is recommended to decrease the stress levels of students, to make adolescents' parents cease smoking, and to educate adolescents on how to refuse the temptation to smoke or pressure from their smoking friend.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3144-3154
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• 2009

Recently, people seek to recognize organizationally and cross sectionally the period work of a company such as manufacturing, retail, distribution, accounting, and personnel management in order to maximize company profit. Also, the ERP system, which is used as a management concept for plan management designed to optimize the utilization of management resources in an enterprise like manner, has been introduced for the same purpose. This study has examined the ERP system, which has been currently set up, for the parent company, S. The study has evidentially analyzed the system efficiency and satisfaction level of customers by examining implementation effects after onsite application and by seeking ways of improvement after recognizing the difficulty linked with use discovered after onsite application of the system and rejection by customers by conducting a questionnaire survey.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.40 no.5
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• pp.644-648
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• 1995

This study was conducted to determine the inheritance of duvatrienediol(DVTs) and cis-abienol concentration from flesh tobacco leaves. NC744, which has a very low levels of DVTs and no cis-abienol was used as a parent in cross to TI 1068 producing a normal amount of DVTs and cis-abienol. Presence of DVTs and cis-abienol on the leaf surface was determined using thin layer chromatography(TLC). Segregation pattern from F$_2$ and BC$_2$[ (TI 1068 $\times$ NC744) $\times$ NC744J generations revealed that TI 1068 have a single dominant gene controlling DVTs and cis-abienol production. And DVTs production was inherited independently of the ability to produce cis-abienol.

• Journal of Korean Academy of Nursing
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• v.31 no.4
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• pp.641-655
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• 2001

Purpose: The purpose of this study was to determine the important factors on juvenile delinquency and to examine relationships between sex, age, the family environment, the personality of adolescents, smoking, and juvenile delinquency. Methods: Data collection was done through questionnaire surveys. The subjects for this study consisted of 1,948 adolescents delinquents : 784, students : 1,164 in Korea, using proportional stratified random sampling method. Statistical methods employed were chi-square, t-test and path analysis. Results: The results of this study were as follows : 1. The delinquent adolescents were reared in a more dysfunctional family environment, and had a higher maladaptive personality than the other student adolescents. 2. The delinquent adolescents showed the larger amount of smoking than the student adolescents. The cause of increased smoking tendency among delinquents simply were 'for social relation', 'for diversion', 'for nicotine addiction', whereas 'for tension relieving' among non-delinquent adolescents. 3. The most powerful contributors on delinquent behavior were antisocial personality tendencies, smoking, sex, strength of parent- child relationships, and the age of the adolescents in this order. Conclusions: Our cross-sectional findings indicate that smoking was one of the most powerful contributing variables to delinquent behavior, but family environment, personality, sex and age of adolescents were also proved to be strong exogenous variables to smoking in adolescents.

• Child Health Nursing Research
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• v.24 no.3
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• pp.337-344
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• 2018

Purpose: The purpose of this study is to examine the association between each phase of the Life Transition Process (LTP) and depressive symptoms among parents of children with Autism Spectrum Disorder (ASD). Methods: Using a cross-sectional study design, data pertaining to LTP and depressive symptoms were collected from 285 parents of children with ASD (101 fathers and 184 mothers). Participants were recruited through the Autism Society of Korea and a counseling center for families of children with ASD. Results: Using a cut-off point of 5 or higher on the Beck Depression Inventory-Short Form, more than half of the parents (53.4%) were deemed depressed; these parents experienced moderate (27.4%) to severe (11.6%) levels of depressive symptoms. A hierarchical multiple regression using the socio-demographic characteristics of children and parents and each phase of the LTP as predictors, found that lower income (${\beta}=-.14$, p=.007) and greater scores for the wandering phase (${\beta}=.59$, p<.001) were significant predictors of greater levels of depressive symptoms. Conclusion: These findings confirm the association between LTP and depressive symptoms for parents of children with ASD, who were found to have a greater risk of depressive symptoms during wandering phase.

• Journal of Korean Academy of Nursing
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• v.35 no.4
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• pp.694-700
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• 2005

Purpose. The purpose of this study was to determine the relationship between peer and parental factors and smoking behavior of adolescents in urban cities and to investigate whether there are gender differences. Methods. A stratified and random cluster sampling design was used to obtain a cross-sectional sample of high school students in two urban cities. The sample consisted of 512 Korean adolescents (256 boys and 256 girls) aged 15 to 18 (mean age 16.7$\pm$.58). Self-reported questionnaire consisted of adolescent smoking behavior, peer smoking and alcohol use, parental smoking and alcohol use, father-mother-peer relationships and perceived social support from peers and parents. Multiple logistic regression analysis was used to examine the hypothesized model. Results. The findings showed that peer and parental factors accounted for $30.3\%$ of the variance in adolescent smoking and peer smoking was most strongly associated with adolescent smoking behavior (OR = 10.18). In addition, peer smoking (OR = 4.71), peer alcohol use (OR = 4.21), and peer relationships (OR = 1.03) were significantly associated with boys' smoking behavior. In girls, peer smoking (OR = 26.50) and parent smoking (OR = 5.48) were significantly associated with smoking behavior. Conclusions. Consistent with previous findings, peer smoking is a significant factor on adolescent smoking. Specifically, boys would be more influenced from peers than girls. Therefore, smoking prevention programs for adolescents might be focused on the social context such as, resisting to peer pressure and enhancing the self-efficacy to control.