• Maxillofacial Plastic and Reconstructive Surgery
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• v.29 no.6
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• pp.474-484
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• 2007

Purpose: The effect of platelet-rich plasma(PRP) on osteogenesis of marrow-derived osteoblasts on histomorphometric analysis in the mandible of rabbit was assessed. Materials and Method: Bone marrow cells were obtained from iliac bone of rabbits and were cultured in a Dulbecco's Modified Eagle's Medium(DMEM) with Dexamethasone, L-Ascortic acid, ${\beta}$-Glycerophosphate to proliferate and differentiate into osteoblasts for $4{\sim}5$ weeks. The expression of osteogenic mar-kers was detected by reverse transcription-polymerase chain reaction(RT-PCR) and silver nitrate stain. Then we prepared bony defects in the mandible of rabbit, 10.0mm in diameter and 4.0mm deep, by trephine bur. In the control group, the defects were filled with autogenous bone and cultured osteoblasts. In the experimental group, the defects were filled with autogenous bone, cultured osteoblasts and PRP. 2 weeks, 4 weeks, 8 weeks later, each group was evaluated with histological and histomorphometric analyses. Results: In vitro, osteoblasts were identified on RT-PCR and silver nitrate stain. According to histological observation, at 2 weeks well-developed anasto-mosing newly-formed woven bone was observed, at 4 weeks anastomosing newly-formed woven bone having osteoblastic activation was observed, and at 8 weeks thick newly-formed woven bone was observed in both control and experimental groups. According to histomorphometric analysis, there were 1.5% more newly-formed bone volume in experimental group than control group at 2 weeks, 28.4% more at 4 weeks, 4.3% more at 8 weeks. Particularly there were significant differences in bone volume at 4 weeks and 8 weeks new bone. Conclusion: Our results demonstrated PRP may enhance osteogenesis of marrow-derived osteoblasts at 4 weeks, 8 weeks.

• Journal of the Korean Institute of Landscape Architecture
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• v.39 no.2
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• pp.73-90
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• 2011

The purpose of this research was to find out the characteristics of secluded cultural landscapes that were retained by Eyogye Cho Lyeo(漁溪 趙旅) as a recluse or a schola at the early time of Chosun dynasty through his poems, residential site and his successors' landscapes. The study sites were selected such as Wonbukgae(院北齋), Chamijeong(採薇亭), Gomaam (叩馬巖) and his graveyard. In order to do that, Wonbukgae, Chamijeong, Gomaam and his cemetery were selected as studying sites. Also researching methods were used by grasping the landscape elements through reading ancient books such as "Eyogyezip(漁溪集)", field-researching, analyzing characters of his secluded landscapes and interpreting his poem's meaning. This research found that: 1) After Danjong(端宗)'s dethronement, he returned to his home town and never come out to the world again. He wanted to keep fidelity to his king forever. 2) He was affected for his seclusion from many people who were Ryu Gyebun(柳桂芬), Bae Junghu(裵仲厚) as his classmates at Sunggyungwan(成均館). Also Won ho(元昊) and Kim Sisyub(金時習) as members of Sangyuksin(生六臣) affected him for sake of their seclusion. 3) The meaning of his seclusion expressed the notation of seclusion as a fisherman from his pen name as 'Yeogye'. Also this kind culture has very particular behavior such as concentration phenomenon of action, absolute eccentricity of seclusion, tourism of nature and deep knoledge of feng shui, strong persistence of seclusion and confucian practical attitude of filial behavior. 4) The secluded cultural landscape is divided to four regions. They have two types of landscape such as secluded cultural landscape of his lifetime and landscape transmission of his posterity and scholars. 5) The interpretation of his poems and their aesthetic analysis found two characters. His poems were expressed by landscape substance like plants, natural and man-made elements. Their theme was confucian, peaceful and faithful seclusion.

• Journal of dental hygiene science
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• v.10 no.6
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• pp.417-424
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• 2010

The aim of this study was to assess the relevancy to oral health behaviors and socioeconomic characteristic among Korean adolescents. From '2007 Youth Behavior Risk Factor Surveillance 73,836 subjects database' which provided from 'Korean Centers for Disease Control and Prevention'. We conducted statistically analyzed binary logistic regression to determine the relation between dental health behavior and socioeconomic characteristic. Compared to adolescents in high-economic group, adolescents in medium or low-economic group had more likely poor dental health behaviors(p<0.05, p<0.01, p<0.001). In particular, there were significantly difference in toothbrushing the frequency of visiting a dental clinic and had received dental health education experiences. Conclusions, Because of the strong relation with demographic socioeconomic characteristic, must consider it when we improve of oral health by behavioral change. These results the need for the further development spread of oral health programs.

• Journal of Digital Convergence
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• v.11 no.11
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• pp.521-528
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• 2013

This study was performed to examine effects of PNF combined pattern training on balance ability and functional ability of hockey players. In order to achieve this purpose, total 28 participants were separated into two group: 14 comparison group and 14 experiment group, and the experiment group performed PNF combined pattern training for 12 week, 3 times a week, 60 minutes a day. Each group was measured beforehand, after 6 week and 12 week. balance ability was measured using GOOD BALANCE system and functional ability was measured using carioca and shuttle-run test. For statistically verifying above measured values, repeated measure analysis of variance was analyzed and have following results. As the comparing results of balance ability, normal standing eye close(NSEC) was ant-post and velocity moment of experiment group showed significant differences(p<.05). And one leg right eye close(OLREC) was ant-post, med-lat and velocity moment of experiment group showed significant differences (p<.05). Also, dynamic balance ability was ant-post and velocity moment of experiment groups showed significant differences(p<.05). As the comparing results of functional ability, shuttle-run of experiment group sowed significant differences(p<.05). From above results, balance ability of hockey players was shown to be improved through symmetric training of PNF combined pattern applied to hockey players, and it can be considered that this is actively recommended for training method to improve athletic performance of hockey players.

• Journal of dental hygiene science
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• v.10 no.5
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• pp.349-356
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• 2010

The purpose of this study was to examine the awareness of dental hygienists, who played a significant role in dental sector, about health care management and their needs for education in an attempt to pave the way for the development of a Dental Hygienist Coordination System(DHCS). The subjects were 156 dental hygienists at 85 dental clinics, who were selected in Gwangju based on the data released as of August 2008 by the Dental Association and public health centers in sampling region. A Questionnaire was conducted in person to gather survey data and SPSS 12.0 program was utilized to make a statistical analysis. This results findings suggested that a systematic curriculum should be developed by focusing on coordination theory and practice, counseling and educational practice, health insurance affairs and health insurance fee claim management.

• The Journal of the Convergence on Culture Technology
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• v.4 no.1
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• pp.175-182
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• 2018

The purpose of this study was to investigate the mediating effects of job satisfaction on the relationship between intrinsic and extrinsic motivation of individual and creative behavior and to investigate the relationship between job satisfaction and creative behaviors. For this purpose, a total of 300 questionnaires were distributed to public officials working in three local governments (GGun, KGun and HGun) in Jeollanam-do, and 213 surveys (71%) were used. The results of the study are as follows. First, It was shown that intrinsic and extrinsic motivation has a positive effect on creative behavior. The effect of extrinsic motivation on creative behavior is the same as the recent research flow. Second, intrinsic motivation positively affects job satisfaction, but extrinsic motivation has no statistically significant effect on job satisfaction about intrinsic and extrinsic motivation and job satisfaction. Third, in the relationship between job satisfaction and creative behavior, it was shown that job satisfaction has a positive effect on creative behavior. Fourth, as a result of verifying the mediating effect of job satisfaction on the relationship between intrinsic and extrinsic motivation and creative behavior, intrinsic motivation has a significant influence on creative behavior through the mediation of job satisfaction. On the other hand, there was no mediating effect of job satisfaction between extrinsic motivation and creative behavior.

• Korean journal of communication and information
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• v.36
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• pp.162-197
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• 2006

This research looks into the narrative aspect of news in order to disclose problems with intercultural communication in our society. News on racial issues and "Hanryu" would illustrate cultural bias against others. This study attempts to analyze narrative structures of news on these issues using narrative theories including Greimas and Levi-Strauss. It covers news on major newspapers such as Chosun, Jung Ang, Dong A, Hanguerae and Economy Daily as well as major broadcasting news including KBS, SBS and MBC. There were 495 news on 'Hanryu' and racial issues with regard to Hines Ward from January 1, 2006 to April 15, 2006. By analysing narrative structures of these news, I found power underneath news messages which undermine the reality. Expansionism and cultural insensibility prevent our society from understanding other cultures as they are. Post-colonial theories provide a guideline for detecting intercultural barriers and national identity crisis in our society.

• Korean journal of communication and information
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• v.25
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• pp.7-40
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• 2004

Today, nuclear energy conflict is caused from the dangerous radioactive material. The main party of this conflict are politic and economic systems which deride nuclear energy, and the persons concerned which it oppose and the anti-nuclear environment group. If the nuclear waste is transported from one nation to another nation, multi national anti-nuclear group appears as conflict party. We call this domestic and transnational risk communication new social movement. From the viewpoint of system theory, the new social movement can mean the offensive development of self-reference which withstand the "technicalization of communication" through the "symbolically generalized communication media" like money and power. By comparing Northeast Asia and Europe, the nuclear energy conflict did not show a big difference in the selection of nuclear waste storing site. In the Northeast Asia, when Taiwan exports the nuclear waste to North Korea, the international conflict broke out. In Europe, Germany has a hard experience with the construction-plan for the re-treating plant that produces the plutonium from the dangerous nuclear waste, and with the transnational transport of the nuclear waste. The new social movement aims the global paradigm which is able to guarantee the subtainability of ecological environment. The nuclear conflict in the "world risk society" is solved through the "discourse-alliance" which accomplishes sub-politics by crossing the border of class, nation and system.

• The Journal of Korean Academy of Prosthodontics
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• v.18 no.1
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• pp.73-86
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• 1980

Recently, the controversy continues as to whether maximum intercuspation of teeth should occur at the terminal hinge position(the condylar theory) or at the myo-co(the neuromuscular theory). There is also much controversy regarding the antero-posterior position of myo-co. The object of this study was to measure and compare with the positional relations of centric relation, centric occlusion and myo-co, and free-way space using Mandibular Kinesiograph and Myo-monitor in the 40 subjects without stomatognathic problems. Mandibular Kinesiograph(M.K.G.) was originally conceived as a research instrument to track mandibular movement and position. As its use in research progressed, its great diagnostic value became apparent in case by case. And Myo-monitor was developed as a means of applying the neuromuscular approach to occlusion. Thus the Myo-monitor technique is an intra-systemic approach to occlusal positioning using patient's own musculature, and Myo-monitor is used to relax the musculature by a light myopulse induced electronically. From this experiment, the following results were obtained. 1. The adaptive free-way space before muscle relaxation was an average of $1.6{\pm}60mm$, and the true free-way space after muscle relaxation using Myo-monitor was an average of $2.4{\pm}0.74mm$. 2. It took an average of $25{\pm}3.11$ minutes to relax the mandibular musculature by Myo-monitor and administration of 5mg. Diazepam and an average of $38{\pm}4.73$ minutes by Myo-monitor without administration of Diazepam. 3. Myo-co existed anterior to centric occlusion, with an average of $0.53{\pm}0.31$ mm, and centric relation existed posterior to centric occlusion, with an average of $0.57{\pm}0.58mm$ before muscle relaxation and with an average of $0.57{\pm}0.43mm$ after muscle relaxation. 4. Centric relation coincided with centric occlusion in 5 of 40 subjects(12.5%), and posterior to centric occlusion in the rest of cases (87.5%). 5. Myo-co existed anterior to centric occlusion in 38 of 40 subjects(95%), except 1 subject that coincided with centric occlusion and 1 subject that existed posterior to centric occlusion. 6. Myo-co and centric relation existed inferior to centric occlusion and the lateral displacement was various with individual difference. 7. The total displacement from centric occlusion to centric relation was an average of $0.74{\pm}0.64mm$ before muscle relaxation, and an average of $0.68{\pm}0.53mm$ after muscle relaxation, and the total displacement from centric occlusion to myo-co was an average of $1.07{\pm}0.58mm$.

• The Journal of the Petrological Society of Korea
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• v.16 no.2 s.48
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• pp.47-58
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• 2007

This study examines the distribution of basement rocks in Gyochon-ri, Muan-eup, Muan-gun, Jeonnam where ground subsidence occurred in June 2005, and traces corrosion of limestone. Mica schist and rhyolite are distributed in the surface of the study area, but thick limestone layer with large and small caverns are distributed underground. A horizon of limestone with maximum width of 300 m and 4 km of length was found along the detour which is in the north of pound subsidence. Such identification of limestone presence would be very useful to predict potential ground subsidence. Limestone in this area was disturbed by fold and fault due to severe shearing deformation. Small caverns were frequently found in anticline part of folds formed in limestone layer. Schists with different thicknesses were intercalated in the limestone with shearing deformation and consist of sheet silicate minerals (chlorite and mica) and quartz. In sections of weathered specimen, it is shown that biotite of schist part was altered into chlorite and corrosion of calcite around the schist followed. This suggest that ground water permeated between intercalated sheet silicate minerals and corrosion of limestone began. And small caverns were generated where active corrosion occurred. This study suggests that because of many reasons (for instance, reclamation of the Bulmu reservior and excess pumping), cavern water level was lowered and cave sediments were removed, and it caused ground subsidence to occur.