• THE JOURNAL OF KOREAN ORIENTAL ONCOLOGY
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• v.4 no.1
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• pp.37-53
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• 1998

The sprig of Jinryungtang Gagambang has been used for curing as a traditional medicine without any experimental evidence to support the rational basis for their clinical use. This experiment was carried out to evaluate the possible therapeutic or antitumoral effects of Jinryungtang Gagambang extract against cancer, and to study some mechanisms responsible for its effect. The cytotoxic and antitumor effects were evaluated on human cell liens (A549, hep3B, Caki-1, Sarcoma 180) after exposure to Jinryungtang Gagambang extract using in ILS, colony forming efficency and SRB assay which were regarded as a valuable method for cytotoxic and antitumor effects of unknown compound on tumor cell lines. The results obtained in this studies were as follows. 1. As a result of exposure to Jinryungtang Gagambang extract, the proliferation of A549, hep3B, Caki-1, good correlations were shown from the results of SRB assay and those of clogenetic assay. 2. The oral administration of Jinryungtang Gagambang extract showed significant effects of increase of MST(mean survival time) and ILS(increased life span) depending on the increasing concentration. 3. Against squamous cell carcinoma induced by MCA, Jinryungtang Gagambang decreased not only the frequency of tumor production but also the number and weight of tumors per tumor bearing mice(TBM). Jinryungtang Gagambang also significantly suppressed the development of 3LL cell-implanted tumors by frequency and their size, and some developed tumors were regressed by the continuous treatment of Jinryungtang Gagambang extract into TBM. 4. Jinryungtang Gagambang extract also increased NK cell activities. According to the above results, it could be suggested that Jinryungtang Gagambang extract has prominent antiutmor effect.

• Management & Information Systems Review
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• v.28 no.4
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• pp.155-174
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• 2009

The purpose of this paper is to analyze the stock market performances CAR of reorganized firms and study the disclosure effect of completion of reorganization to examine whether there exists significant economic merit for the institutionalized continuation of unprofitable firms. The main results of this paper can be summarized as follows. First, the average stock market performances for +12 months after the completion of reorganization compared to those for -6 months before the proposal of reorganization show consistently negative returns. Second, to see whether there exist significant differences between the stock market performances of reorganized firms and those of normal firms with similar characteristics, CAR's measured from -6 months before the proposal of reorganization to +12 months after the completion of reorganization are statistically tested, which results in significantly negative values starting +5 months after the completion of reorganization. Finally, to see the disclosure effect of the news of completion of reorganization, daily CAR's are measured and tested, which shows positive values only for -20 days and -19 days before the disclosure, and shows negative values for the whole periods up to +20 days after the disclosure. The results of the paper imply consistently that the reorganized firms have no better performances compared to the similar normal firms, and the performances do not improve even after the completion of reorganization, which casts serious doubts upon the current forms of the institutionalized continuation of unprofitable firms.

• Journal of Technology Innovation
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• v.18 no.2
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• pp.91-120
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• 2010

This paper examines the effect of bargaining power over intermediate goods prices on innovation and economic growth using a Schumpeterian growth model. The notion of "intermediate goods prices" broadly indicates the reward to innovators including innovative SMEs as well as intermediate goods producers that are vertically integrated to big businesses. From this viewpoint, this paper sets up a Schumpeterian growth model that incorporates the market power between final goods producers and intermediate goods producers. The results show that the reduction of intermediate goods prices slows down long-run growth rates as it erodes the reward to innovations. Lower intermediate goods prices decrease marginal productivity of capital and real interest rates. However, the harmful effect of lower profits on innovations outweighs the beneficial effect of lower interest rates. Simulations using Korea's data for various cases show that in all cases the policies that raise the share of intermediate goods producers are as powerful as the R&D subsidy policies in raising growth rates. Therefore, fair trade policies that enable intermediate goods producers-especially SMEs to obtain more fruits of innovations will be helpful for long-run economic growth.

• Science of Emotion and Sensibility
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• v.14 no.4
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• pp.605-616
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• 2011

The present study examined memory accuracy for faces with positive, negative and neutral emotional expressions to test whether their emotional content can affect visual working memory (VWM) performance. Participants remembered a set of face pictures in which facial expressions of the faces were randomly assigned from pleasant, unpleasant and neutral emotional categories. Participants' task was to report presence or absence of an emotion change in the faces by comparing the remembered set against another set of test faces displayed after a short delay. The change detection accuracies of the pleasant, unpleasant and neutral face conditions were compared under two memory exposure duration of 500ms vs. 1000ms. Under the duration of 500ms, the accuracy in the pleasant condition was higher than both unpleasant and neutral conditions. However the difference disappeared when the duration was extended to 1000ms. The results indicate that a positive facial expression can improve VWM accuracy relative to the negative or positive expressions especially when there is not enough time for forming durable VWM representations.

• Journal of Korea Water Resources Association
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• v.38 no.9 s.158
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• pp.727-736
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• 2005

In this study, the upwind McCormack scheme is introduced to combine the advantage of McCormack scheme, the second order accuracy and simplicity, and the advantage of the upwind scheme, to be applied to the discontinuous flows. This scheme also has another advantage of treating the source terms effectively. This model is approved through applying to the discontinuous flow case with the analytical solution, and the natural river with very strong source terms. Applications of the upwind McCormack scheme developed in this paper show good agreements with the analytical solution without numerical oscillation in existing McCormack scheme. Futhermore, applications to the natural river, the lower Han river with strong variation of bed and width, also show good results in case of both steady flow and unsteady flow. The upwind McCormack scheme in this study will be used for the analysis of flow in natural rivers effectively.

• The korean journal of orthodontics
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• v.40 no.1
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• pp.50-60
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• 2010

The purpose of this article was to evaluate the effects of a new upper molar distalization system, the Frog Appliance, on dentofacial structures in a Class II, division 1 patient. An 11-year-old girl was referred to our clinic for orthodontic treatment. She had a mild skeletal Class II malocclusion with Class II molar and canine relationship on both sides. The treatment plan included distalization of the upper first molars bilaterally followed by full fixed appliance therapy. For the upper molar distalization, a new system, the Frog Appliance, was constructed and applied. Lateral cephalometric radiographs were used to evaluate the treatment results. Distalization of the upper first molars was achieved in four months successfully, and Class I molar relationship was obtained. Total treatment time was 16 months. According to the results of the cephalometric evaluation, a nearly bodily distal molar movement with a slight anchorage loss was attained. In conclusion, the Frog Appliance was found to be a simple, ef ective, non-invasive, and compliance-free intraoral distalization appliance for achieving bilateral molar distalization.

• The korean journal of orthodontics
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• v.14 no.1
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• pp.15-24
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• 1984

The purpose of this study was to evaluate the effect of O.M.A on Angle's class III malocclusion. The author analysed the data obtained from pre- and post-treatment lateral cephalograms. The results obtained were as follows : 1. Forward growth of maxillary complex was accomplished. 2. The mandible showed few morphological changes in the presence of downward and backward swing. 3. It was assumed that the hooks attached to the intraoral appliance should be placed as far frontally as possibie. 4. Relations of the upper and lower jaws were improved resulting in better facial profiles.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.47-56
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• 2018

The purpose of this study was to identify the relation among the CRR, MA, and MS of military solder's who have experienced couple relationship troubles. Data collected from 239 soldiers in front-line division and post line division was analyzed by correlation analysis, t-test and hierarchical analysis using SPSS 18.0. As the results, 1. CRR and MA showed a positive correlation and CRR and MS showed a negative corelation. 2. CRR showed a significant influence on the MA. 3. CRR had a mediating effects on the process where MS influenced MA. The results of this study are expected to be used as the primary data for raising the adaptability to the military especially on the subject of couple relationship, and as an educational guidance for helping soldiers to see the positive aspect of the adversity and stress of military life.

• The korean journal of orthodontics
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• v.30 no.4 s.81
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• pp.387-398
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• 2000

This study was aimed to observe the effect of Anterior J hook headgear on the craniofacial structures in mixed dentition with Class II malocclusion. The laterial cephalograms of 20 children treated by Anterior J hook headgear were traced, digitized and statistically analyzed. The results were as follows : 1. Forward growth of maxilla was inhibited. 2. Rotational effect of maxilla was not observed. 3. There was distal movement of maxillary dentition. 4. Maxillarly_dentoalveolar growth changes were more effective in anterior portion than posterior portion. 5. Mandible maintained a normal growth and mandibular plane angle was maintained during treatment period. 6. The ratio of anterior facial height to posterior facial height was almostly not changed.

• The Journal of the Convergence on Culture Technology
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• v.7 no.3
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• pp.173-178
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• 2021

This study aimed to understand and analyze the learners' class satisfaction and the effectiveness of synchronous online classes after COVID-19. A total of 188 learners participated in the survey conducted at the end of the Fall Semester 2020 at C University located Gyeongsangnam-do. Findings revealed that learners' satisfaction with the synchronous online classes was relatively low, and the learners had negative perception of that. Learning content have the biggest effect on the learners' class satisfaction. Next came class management and the online learning platform. Therefore, instructors need to organize learning content effectively and enhance learners' understanding considering the most influential variable, learning content so that learners are satisfied with the synchronous online classes. Also, instructors should make it possible for learners to get familiar with the online learning platform and use it without any problems through systematic and faithful class design for effective learning in unfamiliar online learning environment. In addition, instructors need to know learners' needs and difficulties and plan their synchronous online classes. This study has limitations in that it was conducted only at one college and the limited number of variables was measured.