• KOMUNHWA
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• no.57
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• pp.195-210
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• 2001

One kiln site of Koryo Earthenware in Hwakok-ri, Ansung was excavated from March 15, 1999 to May 15, 1999 by Museum Team of Ehwa Women's University, and also other one earthenware kiln site was confirmed as exposed figure on the ground. In this study, the

• Journal of Veterinary Clinics
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• v.27 no.5
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• pp.614-617
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• 2010

A 3-year-old, female spotted hyena (Crocuta crocuta) was referred with dystocia. The hyena had been in labor for over 5 days, but she failed to expel the infant. The blood biochemistry profiles showed severe azotemia. During caesarian section, we confirmed that the uterus had expanded and contained 1 dead, decayed infant, which compress the urethra, leading to the expansion of the urinary bladder and that the dead fetus was nearly 3 kg in weight (approximately 5% of the maternal weight). Thus, we confirmed that the dystocia caused by oversized fetus and malposture, and the severe azotemia resulted in compression of the urethra by fetus in the hyena. This report is the first to show that the dystocia can induce postrenal azotemia in female spotted hyenas.

• Management & Information Systems Review
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• v.35 no.2
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• pp.27-44
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• 2016

In recent year, graphic emoticons in MIM(Mobile Instant Messenger) play an important role not as a valuable communication methods, but as main business model for MIM service providers. Although the graphic emoticons in MIM are regarded as a commercial product, there has been little systematic research reflecting consumers' perspectives. In order to fill this theoretical and practice gap, the study is designed to explore the structural relationships among emoticon use motives, attitude, and purchasing intention to emoticons in context of MIM. The results showed that emoticon use motives in MIM were composed of two main factors, perceived usefulness and perceived enjoyment. And we also verified that both perceived usefulness and perceived enjoyment positively impact flow in communication with using emoticons and social influence. Lastly, flow and social influence were positively related to attitude toward using emoticons and attitude also was related to purchase intention to emoticons in MIM, positively. However, flow and social influence did not have a positive influence on purchase intention to emoticons directly. The implications and limitations of this study are also discussed.

• Tuberculosis and Respiratory Diseases
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• v.70 no.4
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• pp.307-314
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• 2011

Background: Chronic obstructive pulmonary disease (COPD) is a major cause of death and disability worldwide and one of the most prevalent diseases in Korea. We examined trends and risk factors of health care utilization for COPD in Korea. Methods: We retrospectively analyzed the database of Patient Surveys from 1990 through 2008, which were nationwide surveys of health services utilization through outpatient department (OPD) visits and hospitalization. Physician-diagnosed COPD patients whose ages were 45 years and older were included. Results: OPD visits and hospitalization of COPD patients between 1990 and 2008 were estimated to be 68,552 and 17,774 persons, respectively. Trends in OPD visits and hospitalization for COPD significantly increased from 1990 through 2008 (p=0.019, p=0.001, respectively). The increment rate for OPD visits was 2.0 fold over those years; for hospitalization it was 3.3 fold. Risk factors for OPD visits for COPD were male gender (odd ration [OR], 1.41; 95% confidence interval [CI], 1.39~1.43), those aged 65 years and older (OR, 1.50; 95% CI, 1.47~1.53), residential area other than a metropolis (OR, 1.08; 95% CI, 1.07~1.010) and access to a physician's office (OR, 1.17; 95% CI, 1.14~1.21). Risk factors for hospitalization were male gender (OR, 2.15; 95% CI, 2.07~2.23), those aged 65 year and older (OR, 2.86; 95% CI, 2.72~3.00), residential area other than a metropolis (OR, 1.98; 95% CI, 1.90~2.07) and access to a hospital (OR, 2.88; 95% CI, 2.59~3.22) (p<0.001, both). Conclusion: Health care utilization for COPD subjects increased from 1990 to 2008. Risk factors for the utilization were male gender, older age, and residential area other than a metropolis.

• Convergence Security Journal
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• v.18 no.1
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• pp.143-155
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• 2018

The purpose of this study is to extract the failure attributions to identify the failure factors of the security guards and to derive the risk factor factors through failure cases analysis. Failure attributions were prepared by using semi-structured questionnaires(17) and closed questionnaires(179) starting from the fully open questionnaires(8), and processed through SPSS 21.0 and AMOS 21.O statistical packages. As a result of summarizing the causal relationship between the failure attribution and the failure case (patrol failure pattern factor), In Park Jung-Hee's assassination, lack of experience(2), negative mind(1), lack of work ability(1), lack of experience(2), organizational non-system activeness(2), lack of awareness of mission(1) Failure(2), lack of consciousness(2), and 14 failure patterns were found. Aung-San National Cemetery explosion occurred in eight failure patterns including insecurity(1), negative mind(1), lack of work skills(2), lack of experience(2), individualism(1), There were eight failure patterns in the case of Mr. Yook Young-Su 's sniping, including insincerity(2), negative mind (1), lack of experience(2), lack of awareness of mission(2) and failure to share work(1).

• Journal of the korean academy of Pediatric Dentistry
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• v.49 no.4
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• pp.468-480
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• 2022

The purpose of this study was to evaluate the effect of interceptive primary canine extraction in palatally and buccally displaced maxillary permanent canines, and to analyze the clinical and radiographic factors affecting the treatment outcome. 97 maxillary permanent canines from 86 patients whose maxillary permanent canine were in the mesio-occlusal directions and overlapped with the roots of the adjacent teeth were analyzed. In 64 of 97 (66.0%) maxillary permanent canines, the displaced crown was completely deviated from the adjacent lateral incisor root only by extraction of the primary canine. Not only the characteristics of maxillary permanent canines such as bucco-palatal displacement direction, horizontal and vertical position of the crown tip, and presence of apical closure, but also periapical rarefaction on the primary canine and peg-shaped adjacent lateral incisor significantly affected the treatment outcome.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.17 no.2
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• pp.1-13
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• 2022

This study derived the success factors of youth enterprises by applying the Delphi Method to start-up experts. Through this, it aims to improve understanding of youth enterprises in entrepreneurship education and start-up support projects and contribute to the development of education and support programs suitable for youth enterprises. Also The purpose of this study is to help youth entrepreneurs solve their curiosity about the success factors of youth enterprises, identify the factors that youth entrepreneurs should first secure or perform among the factors they need to consider during start-ups, and use limited resources efficiently and effectively to succeed. In this study, the Delphi Survey was conducted twice in total. The first Delphi Survey utilized the Modified Delphi Method using structured closed-ended questions, and a pilot test was conducted on youth entrepreneurs and start-up experts to compensate for the problem of the Modified Delphi Method. In the first Delphi Survey, IBM SPSS Statistics 22 and Microsoft Office Excel 2016 were used to calculate the mean, standard deviation, median, interquartile range, and content validity ratio. In the Delphi 2nd survey, the same statistical values in the 1st survey and additionally cronbach's alpha were calculated. As a result of the Delphi Survey, four factors, such as the entrepreneurial characteristics, entrepreneurial preparation, entrepreneurial strategy, and entrepreneurial environment, and 22 sub-factors were derived as success factors for youth enterprises.

• Clinical and Experimental Pediatrics
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• v.45 no.2
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• pp.232-239
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• 2002

Purpose : Renal cystic diseases comprise a mixed group of heritable, developmental and acquired disorders. Recently the use of imaging modalities such as ultrasonography and radionuclide scanning has increased the detection rate of renal cystic diseases. We studied to review the clinical features and treatment of renal cystic diseases in children. Methods : This study was performed in 95 children with renal cystic diseases in the Department of Pediatrics, Asan Medical Center from October 1989 to June 2001. Results : In 95 patients, there were 55 cases(58.0%) with multicystic dysplastic kidney(MCDK), 19 cases(20.0%) with simple renal cysts, 13 cases(13.7%) with hereditary polycystic kidney diseases( 7 with autosomal recessive type, 5 with autosomal dominant type, 1 with undetermined), 6 cases(6.3%) with renal cysts in tuberous sclerosis and 1 case(1.0%) with medullary cystic disease. All MCDK patients had no renal dysfunction and hypertension during the follow-up period. Three out of 13 with polycystic kidney diseases had progressed to end-stage renal disease during the follow-up period. One case with a simple cyst underwent laparoscopic malsupialization for decompression. Conclusion : Renal cystic diseases have diverse clinicopathologic features and variable prognosis. We emphasize that routine follow-up should be performed to prevent and to detect early treatable complication in renal cystic diseases. Therefore, their natural history and treatment need further investigation and long term follow-up is required.

• Clinical and Experimental Pediatrics
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• v.45 no.5
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• pp.622-628
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• 2002

Purpose : The purpose of this study is to ascertain the clinical manifestations and associated cardiac anomalies of dextrocardia. Methods : Twenty-four pediatric patients, who were admitted to, or visited, Dongsan Medical Center Keimyung University and were diagnosed with dextrocardia between January 1996 and July 2001, were enrolled in this study. All patients received echocardiogram and abdominal ultrasonogram to identify structural cardiac anomalies and visceral position. Results : Among 24 patients, 7 cases were situs solitus(29.2%), 10 cases(41.6%) were situs inversus and 7 cases(29.2%) were situs ambiguous. Most were diagnosed within a week of life(87.5%). They were most commonly cyanotic(45.8%), but eleven cases(45.8%) had no specific symptoms or signs. Nineteen cases(79.2%) had accompanied cardiac anomalies, and pulmonary stenosis or atresia were the most common among them. All the cases of situs solitus and ambiguous had associated cardiac anomalies, but half of the situs inversus had that. Eleven cases were dead by cardiac or extracardiac anomalies during follow up and the mortality rate was higher in situs solitus or ambiguous group than situs inversus group. Conclusion : Dextrocardia accompanies different cardiac and extracardiac anomalies. It's very important to diagnose dextrocardia and associated cardiac or extracardiac anomalies in the early stages of life to improve prognosis.

• Journal of Intelligence and Information Systems
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• v.21 no.3
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• pp.19-36
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• 2015

Social media is an emerging issue in content services and in current business environment. YouTube is the most representative social media service in the world. YouTube is different from other conventional content services in its open user participation and contents creation methods. To promote a content in YouTube, it is important to understand the diffusion phenomena of contents and the network structural characteristics. Most previous studies analyzed impact factors of contents diffusion from the view point of general behavioral factors. Currently some researchers use network structure factors. However, these two approaches have been used separately. However this study tries to analyze the general impact factors on the view count and content based network structures all together. In addition, when building a content based network, this study forms the network structure by analyzing user comments on 22,370 contents of YouTube not based on the individual user based network. From this study, we re-proved statistically the causal relations between view count and not only general factors but also network factors. Moreover by analyzing this integrated research model, we found that these factors affect the view count of YouTube according to the following order; Uploader Followers, Video Age, Betweenness Centrality, Comments, Closeness Centrality, Clustering Coefficient and Rating. However Degree Centrality and Eigenvector Centrality affect the view count negatively. From this research some strategic points for the utilizing of contents diffusion are as followings. First, it is needed to manage general factors such as the number of uploader followers or subscribers, the video age, the number of comments, average rating points, and etc. The impact of average rating points is not so much important as we thought before. However, it is needed to increase the number of uploader followers strategically and sustain the contents in the service as long as possible. Second, we need to pay attention to the impacts of betweenness centrality and closeness centrality among other network factors. Users seems to search the related subject or similar contents after watching a content. It is needed to shorten the distance between other popular contents in the service. Namely, this study showed that it is beneficial for increasing view counts by decreasing the number of search attempts and increasing similarity with many other contents. This is consistent with the result of the clustering coefficient impact analysis. Third, it is important to notice the negative impact of degree centrality and eigenvector centrality on the view count. If the number of connections with other contents is too much increased it means there are many similar contents and eventually it might distribute the view counts. Moreover, too high eigenvector centrality means that there are connections with popular contents around the content, and it might lose the view count because of the impact of the popular contents. It would be better to avoid connections with too powerful popular contents. From this study we analyzed the phenomenon and verified diffusion factors of Youtube contents by using an integrated model consisting of general factors and network structure factors. From the viewpoints of social contribution, this study might provide useful information to music or movie industry or other contents vendors for their effective contents services. This research provides basic schemes that can be applied strategically in online contents marketing. One of the limitations of this study is that this study formed a contents based network for the network structure analysis. It might be an indirect method to see the content network structure. We can use more various methods to establish direct content network. Further researches include more detailed researches like an analysis according to the types of contents or domains or characteristics of the contents or users, and etc.