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신현식,정근회 麗水水産大學校産業技術硏究所 1997 産業基術硏究所 論文集 Vol.6 No.-
In this study, we define the appropriate classification of information and telecommunication industry, including telecommunications equipment and service industry in order to provide the concerned governmental institutions with data useful for establishing industry promoting policy. And on the basis of this classification, we analyse traits and structure of the recent market, and also perform trends-analysis and market-forecast using data which have been fielded in our DB system since 1984. First, we classify telecommunications industries into telecommunications equipment industry, information equipment industry, S/W industry, telecommunications component manufacturing industry, and telecommunications service industry. And then, we classify telecommunications equipment industry and telecommunications service industry into more details; respectively, wire communication equipment / wireless communication equipment, computer equipment / peripheral equipment, system software / application software, active component / passive component / service / other telecommunications service industry. The characteristics of the recent industry are as follows; 1. in the economic-industrial aspect, role enlargement of information and telecommunications industry. 2. in the aspect of technology environment, rapid development of technology and technology commercialization. 3. in the market structure aspect, expansion of Regionalism.
가정불화로 인한 질환과 손상으로 응급센터에 내원한 환자
송근정,조용준,최영미,안무업,신동훈,황장회,최정태,안희철,송준호,유기철 대한응급의학회 2000 대한응급의학회지 Vol.11 No.1
Background. It is important for the medical providers who work in the emergency department to have the adequate knowledge about the nature and the ways to deal with the patients who suffer from domestic violence because in our country the management of them is primarily performed at the emergency centers. The purpose of this study is to provide basic data about the domestic violence and to help in developing the education and management model for the medical providers. Methods. The authors retrospectively reviewed the medical records of 198 patients who visited the emergency center of Chunchon Sacred Heart Hospital from July 1997 to August 1998. Results. The violence against the spouses was highest(108 cases:54.5%) and most of the victims were female(92%) in those cases. The violence against children younger than age 3 was 30%. The majority of the victims were arrived around noon(54.5%) and among them, the aged and children were more concentrated. The degree of injury was severer than that of the victims of general violence. Conclusion. In this study the violence against the spouses was the highest in incidence and against the aged was the lowest. The violence rate against children younger than age 3 was lower than that of other comparable studies. The incidence of sexual violence was significantly lower than that of other countries. The degree of injury was generally severer than that of general violence patients. But these result should be carefully criticized and accepted because up to now the system for the detection and management for them is not well established.
김정희,진태호,동진근 원광대학교 치의학연구소 1994 圓光齒醫學 Vol.4 No.2
This study was designed to investigate the effect of Gibson' s smile exercise. The author took the smile photographs of 35 university students who appeared unnatural smiles though they had good dentition or well restored state of their teeth. The author explained Gibson's smile exercise and they trained their perioral muscles during 4 weeks at home. The smile photographs were taken at regular intervals, before the smile exercise, 2 weeks after and 4 weeks after the smile exercise. And then, esthetic smile scores were estimated by 10 appraisers who were dentists. Some questionares were taken after smile exercise. And acquired scores were analized statistically using the SPSS program. The results obtained were as follows 1. The smile scores of 2 weeks after and 4 weeks after the smile exercise were higher than before the smile exercise. 2. The smile scores of 4 weeks after the smile exercise were higher than 2 weeks after the smile exercise. 3. The smile scores of the group interested in smiles were higher than the group not interested in smiles at 2 weeks after and 4 weeks after the smile exercise, but before the smile exercise there was no difference between two groups.
수소이온 농도의 변화가 배양 인체 치주인대세포의 활성에 미치는 영향
김정희,유형근,신형식 원광대학교 치의학연구소 1995 圓光齒醫學 Vol.5 No.2
Periodontal therapeutic modalities should be re-establishing and regenerating the periodontal tissue previously lost to the disease. To achieve periodontal regeneration, periodontal ligament cells must selective migrate to the deneded root surface, attached and proliferated it. Local pH concentration is one of the most factors that periodontal regeneration. The aims of this study were to examine on biological effects of pH to the human periodontal ligament cells in vitro, especially on the cell morphology, attachment, activity, vitality and viability. Human periodontal ligament cells were cultured from extracted tooth for non-periodontal reason. Immediately after extraction, any soft tissue adhering to the cervical parts of the roots was carefully removed with a sterile curette. To produce different pH levels in the media, Eagle's MEM was adjusted from pH 6.6 to 8.2 in 0.2 intervals with 1 M NaOH and 1 N HCI. After cultivation, Then, Periodontal ligament cells were cultured at pH ranging from 6.6-8.2. attachment assay was done at 1, 2 day incubation and activity assay was done at 1, 2, 3 day incubation. The experiments were evaluated by scaning electron microscopic techniques (HITACHI X-650 Scaning Electron Microanalyzer, Tokyo, Japan), MTT assay, and the cultured periodontal ligament cells were fixed in neutral formalin for 24 hours and immunohistochemically processed by PCNA for proliferating ability. The surviving cells in the medium showed slightly increased volume and widening intercellular distances at low concentration of pH than control group (pH 7.4), and apparently shrinkage at high concentration of pH than control group (pH 7.4). The results of the statistical analysis from the experiment on attachment, vitality and viability were as follows. Attachment of periodontal ligament cells at 1st and 2nd day, similar attachment rate of low concentration pH compared with control value (pH 7.4). But above pH 8.0, attachment rate were statistically significant decrease from control value(P<0.05). Periodontal ligament cell's activities were maximum at pH 7.6 by MTT assay. Similar with control value at low concentration of pH. But, the activities were statistically significant decrease at high concentraration of pH(P<0.05). Cellular proliferating rate (PCNA index) were statistically significant decrease from control value at low and high concentration of pH(P<0.05). This results suggested that hjgh concentration pH, in other words, alkali pH was cytotoxic effects on human periodontal ligament cells in vitro.