• Journal of the Korean Institute of Landscape Architecture
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• v.20 no.2
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• pp.90-105
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• 1992

the purpose of this study is to suggest objective basic daa for park management proposal through the quantitative analysis of users' behaviours and satisfaction for the actual conditions of management in Chonju neiborhood parks. For this, users' behaviors and socio-ecnomic characteristics have been anlyzed. Specificaly, it atempts to investigate users' anticipation and degree of satisfaction applied Expectancy Theory by Likert scale. And users' satisfaction for the actual conditions of management had been analyzed by using the multiple regression. Results of this study can be summarized as follow; From the aspect of utilization reality, the male usage was slightly higher than female usage, and the usage rate among the young and students such as high school students or university students also appeared slightly higher than the norm. Due to the fact, subject park had been neighborhood parks, walking usage was predominant, and the length of stay to be less than an hour. Generally, the values of users' post occupancy evaluation were lower than those of anticipated, in well known parks. In landscape satisfaction level, the parks with harmonious visual element had high landscape evaluation, and each category showed diversity depending on the park. Seasonableness, formation of physical elements, visual uniqueness, cozy atmosphere appeared as main explicatory variables having positive effects on the satisfaction level for the landscape. According to the multiple regression analysis, the major variables to the satisfaction for the actual condition of vegetation managements were harmony with facilities, recovery of artificial injury. In the park facilities and operation, the major variables related to the satisfaction were conditions of management of rest equip, facilities and guidance of use, observe the rules, respectively.

• Knowledge Management Research
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• v.10 no.2
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• pp.85-103
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• 2009

Web 2.0, characterized as openness, sharing, and participation, has enabled Internet users to easily generate a variety of contents, and to share them through Web 2.0 services. Knowledge search service (KSS) is positioning itself as one of typical Web 2.0 services. Yet, few studies have sharpened our understanding of users' knowledge sharing behavior in the KSS environment. In order to address this knowledge void, this paper attempts to explore antecedents of their usage behavior in the KSS environment. Typically, they utilize stored knowledge and share their knowledge simultaneously. Considering this characteristic, our study regards service usage intention and knowledge sharing intention as final dependent variables. This study advances a research model based on Bhattacherjee's expectation-confirmation model, which is expanded by incorporating trust belief. Because of the openness of KSS, trust belief is believed to play a critical role in forming users' service usage intention and knowledge sharing intention. Furthermore, this study examines the difference of the antecedents' effects in terms of users' gender. We collected data from 275 respondents who have experience in using KSS. PLS (partial least squares) was employed for the analysis of the data. Analysis results confirm the important role of user satisfaction and trust belief in the formation of users' service usage intention and knowledge sharing intention. More importantly, trust belief has a more salient effect on knowledge service usage intention than user satisfaction. This study also shows the moderating role of users' gender. Finally, this paper provides managerial guidance on strategic planning aimed at improving users' service usage intention and knowledge sharing intention in the KSS environment.

• The Journal of Korean Academy of Prosthodontics
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• v.46 no.3
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• pp.227-237
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• 2008

STATEMENT OF PROBLEM: Zirconium oxide can be a substitute to titanium as implant materials to solve the esthetic problems of dark color in the gingival portion of implant restorations. PURPOSE: This study was performed to define attachment and growth behavior of osteoblast- like cells cultured on grooved surfaces of zirconium oxide and evaluate the genetic effect of zirconium oxide surfaces using the reverse transcriptase-polymerase chain reaction (RT-PCR). MATERIAL AND METHODS: MC3T3-E1 cells were cultured on (1) commercially pure titanium discs with smooth surface (T group), (2) yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) with machined surface (ZS group), and (3) Y-TZP with $100{\mu}m$ grooves (ZG group). Cell proliferation activity was evaluated through MTT assay and cell morphology was examined by SEM. The mRNA expression of Runx2, alkaline phosphatase, osteocalcin, TGF-${\beta}1$, IGF-1, G3PDH in E1 cells were evaluated by RT-PCR. RESULTS: From the MTT assay, after 48 hours of adhesion of MC3T3-E1 cells, the mean optical density value of T group and ZG group significantly increased compared to the ZS group. SEM images of osteoblast-like cells showed that significantly more cells were observed to attach to the grooves and appeared to follow the direction of the grooves. After 24 hours of cell adhesion, more spreading and flattening of cells with active filopodia formation occurred. Results of RT-PCR suggest that T group, ZS group, and ZG group showed comparable osteoblast-specific gene expression after 24 hours of cell incubation. CONCLUSION: Surface topography and material of implants can play an important role in expression of osteoblast phenotype markers. Zirconia ceramic showed comparable biological responses of osteoblast-like cells with titanium during a short-time cell culture period. Also, grooves influence cell spreading and guide the cells to be aligned within surface grooves.

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.407-414
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• 2018

This study was conducted to examine the depression, study stress, adolescents' problem behavior in middle school students. A cross-sectional survey was conducted. 116 participants were selected from middle school in Y city, J area. A structured questionnaires were used as a study instrument which included general characteristics, children's depression inventory(CDI), study stress and adolescents' problem behavior. Descriptive statistics, independent t-test, one-way ANOVA, Pearson correlation coefficient and multiple regression were used for analysis. the result was that grade level, relation with parents and Friends were major predictors of problem behaviors of male students in the second grade of middle school. As a result of this study, it is to suggest the necessity of guidance, education policy, and program development for the experience and formation of healthy human relationships among adolescents.

• THE JOURNAL OF KOREAN ORIENTAL ONCOLOGY
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• v.9 no.1
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• pp.53-63
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• 2003

This study was analyzed the effects of blood-activating and stasis-eliminating herbs on anti-tumor and hematogenic metastasis. The metastasis and recurrence of tumor was the basis of yudok(yudu) on remained tumor cell and stagnation of blood, thermotoxo, phlegm, asthenia of healthy enerngy, stagnation of vital energy. Malignant tumor is caused by carcinogen and go through the progress of initiation, promotion, progression, it is closely related with Eohyul$(y{\grave{u}}xi {\breve{e}})$. Symptoms of blood stasis disease are purplish tongue, mass, fixed stabbing pain, ecchymosis of nail, hypodermic petechia, dermal thesaurismosis, melena, ecchymoma, disturbance of circulation. Effects on the therapy of activating blood circulation and congestion are anti-tumor, anti-coagulation, anti-hemolysis, anti-solution, anti-inflammation, anti-infection, control of blood circulations, control of connective tissue metabolism and control of immunity. They can directly kill the cancer cells entering the blood circulation, inhibit the formation of tumor embody and reduce the blood hyperviscosity. It is suggested that these herbs can be used to prevent and treat blood metastasis of cancer under the guidance of syndrome differentiation.

• Korean Journal of Human Ecology
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• v.5 no.2
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• pp.37-52
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• 1996

The purpose of this study was to explore the nature of parent education programs for fathers with children aged 1 through 5 year-old. One-Hundred forty-four fathers were answered using questionaire designed to elicit their perception of fathering, the details of domain parent education, and parent education program. Data were analyzed quantitatively and qualitatively to determine the contents of parent education program as perceived by the fathers. The results of this study were as follows; 1. Fathers perceived about parent education as 'The training of living behavior', 'The education about essential method of living manners and the guidance for children.' Also, fathers commented some difficult points of raising children as; 'children' sickness', 'Parents' permission or control', and 'Childrens' stubborness'. Many fathers pointed their shortages; 'to be a model of habit and behavior', 'Lacking of enough experience and imagination to their children', and 'Limiting parent's patience to their children'. 2. On the domain of parent education, six subscales of requisite degree was very high. The highest requisite domains like three questions of 34 subordinate question was; 'to encourage their children their children', knowledge about how to develop children' emotions', 'knowledge of their influence to their children' humanity'. 3. Fathers answered that a parent education was needed in infant period. They choose suitable time and place, from p.m.6 to p.m. 9 on a day and once in a week in the kindergarten. Also, the contents of parent education program were needed in order as follows; 'Communication method with a child', 'Formation of living behavior'. Moreover, 77.6% of fathers wanted to participate in the parent education program.

• Journal of the Korean Society for Library and Information Science
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• v.43 no.1
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• pp.161-187
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• 2009

Today's society demands that Individuals need to acquire skills to select information they need, read critically that have been gathered and use them for their advantage. The ability to actively respond to information can be cultivated through reading which facilitates creative, critical thinking, and self-initiated learning. This research presents results from a study in which subject-centered approach to reading guidance was applied to elicit positive changes in reading attitudes and to contribute to the elevation of self-concept among adolescents. Using survey questionnaire, we compared the changes in reading attitude before and after treatment. The results indicate that subject-centered reading instruction brought positive changes in reading attitude among middle school students, contributed positively to the formation of self-concept and the improved student initiated learning.

• Journal of the korean academy of Pediatric Dentistry
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• v.31 no.4
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• pp.598-604
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• 2004

Impaction of mandibular first molar is relatively rare and its overall frequency has been reported to be 0.01%. The etiology of impaction are lack of eruption space, physical obstacles such as supernumerary teeth, odontomas or odontogenic tumors, hereditary factors, functional disturbances of endocrine glands and traumas. Impaction of mandibular first molar can result in a short lower facial height, formation of a follicular cyst, pericoronal inflammation, resorption of the roots of neighboring teeth and malocclusion. The treatment options available for impacted teeth include surgical exposure, orthodontic forced eruption, surgical repositioning and surgical removal of unerupted molar. This report presents two cases of distally tilted and impacted mandibular first molars which were treated by surgical exposure. In these cases, we could observe spontaneous eruption of the impacted mandibular first molars after surgical exposure.

• Journal of the korean academy of Pediatric Dentistry
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• v.32 no.3
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• pp.543-549
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• 2005

The maxillary canine is especially important as it has the longest root, provides guidance for lateral movement of the mandible and masticatory function and is a key in esthetics due to its position. Maxillary canine has the longest time to develop and a complex route from the place of formation to the site of eruption, and so it is prone to impaction more than other teeth. The clinician should consider the various treatment options : (a) No treatment and observation, (b) surgical exposure and orthodontic traction (c) autotransplantation (d) extraction. Surgical exposure of the canine and orthodontic treatment to bring the tooth into the line of occlusion is considered the most desirable approach. This case presents the results of treatment for impacted maxillary canine by surgical exposure and orthodontic tooth movement.

• The Korean Journal of Physiology and Pharmacology
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• v.12 no.5
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• pp.225-230
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• 2008

Netrins are secreted molecules and involved in axon guidance, cell migration and tumor development. Recent studies revealed that netrins perform novel functions in such processes as epithelial development and angiogenesis without operating through the classical netrin receptors, DCC (Deleted in Colorectal Cancer) and Unc5h. In the present study, we investigated the roles of netrin-1 and its receptors in cell spreading of human glioblastoma cells, and found that netrin-1 haptotactically enhanced fibronectin-induced cell spreading and focal adhesion formation in U373 glioblastoma cells. Netrin-1 binding to the U373 cell membrane was blocked by an antibody against ${\alpha}v$ integrin subunit, but not by an anti-DCC or anti-Unc5h antibody. In addition, enhancement of the fibronectin response by netrin-1 was abrogated by a function blocking antibody against integrin ${\alpha}v{\beta}3$. Since the ${\alpha}v$ subunit of the integrin family plays an important role in the pathophysiological aspects of cell migration, including tumor angiogenesis and metastasis, our data provide important insight into the molecular mechanism of netrin function.