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      • 노치재의 균열닫힘현상과 피로균열성장거동에 관한 연구

        우홍식,한지원 東國大學校 1993 東國論叢 Vol.32 No.-

        Crack length and closure are monitored simultaneously and countinuously in terms of the testing by a PC-aided unloading elastic compliance technique. The relation between the crack opening stress intensity factor and crack length is determined from the experimental results. The crack opening stress intensity factor of short cracks, K_op, can be predicted from the crack opening stress intensity factor of near threshold of long crack, K_op.L. The growth rate of short cracks at notch root can be predicted from the crack opening stress intensity factor of short cracks, K_op, and the growth equation of long cracks in region Ⅱ.

      • KCI등재

        Lesch-Nyhan 증후군 환아의 자해에 의한 혀의 외상

        김지희,최병재,김성오,최형준,손흥규,이제호 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.3

        Lesch-Nyhan 증후군은 드물게 나타나는 X 염색체 열성 유전 질환으로 purine의 대사 장애를 보이는 질환이다. Purine의 대사 장애는 대사에 관여하는 효소인 hypoxanthine guanine phosphoribosyl transferase의 결손 또는 활성 감소로 인하여 나타나며,요산의 과다 생산에 의한 요산과다혈증,요산과다뇨증 등의 신장계 증상과 정신지체,무도증 등의 신경학적 장애를 보이고,구강이나 손가락에 대한 자해를 나타낸다. 이 중 자해 행위는 입술과 혀,손가락을 깨무는 경우가 흔하고,심하면 혀와 손가락이 완전히 절단될 수도 있다. 이 경우 자해로 인한 통증뿐 아니라,연조직 결손으로 인한 심미적인 문제와 상처 부위로의 2차 감염이 발생할 수 있다. 이러한 Lesch-Nyhan 증후군 환자에서 자해를 막기 위해 여러 방법이 사용되고 있는데,이 중 치과적으로 접근하는 방법으로는 마우스 가드나 lip bumper 등의 장치를 이용하는 방법과 해당 치아들을 모두 발거하는 방법,악교정 수술을 통해 개방 교합을 형성해 주는 방법 등이 있다. 본 증례는 13세 9개월의 Lesch-Nyhan 증후군 환아로서 자해에 의해 혀에 심각한 외상을 가한 경우로 마우스 가드를 이용한 보존적인 방법을 사용하였으나 계속적으로 혀에 외상을 가해 하악 전치 뿐 아니라 구치까지 발거하여 치료하였다. Lesch-Nyhan syndrome is a rare X-linked recessively inherited disorder, caused by complete absence or decrease in activity of hypoxanthine guanine phosphoribosyl transferase(HPRT), an enzyme involved in purine metabolism. This enzyme deficiency gives rise to nephropathy symptoms, such as hyperuricosuria and hyperuricemia by excessive uric acid production and neuropathy symptoms, such as mental retardation, choreoathetosis and self mutilation behavior. Patients with Lesch-Nyhan syndrome have tendency to bite their liP, tongue and finger, In severe cases, partial or even total amputation of tongue or finger occur. Self-inflicted bites are often complicated by secondary infection to the injured site as well as pain. Furthermore tissue loss by biting results in esthetic problems. The dental management of self mutilation includes treatment with appliances such as soft mouth guard or lip bumper, extraction of all the teeth, and orthognathic surgery. We report a case of a 13 year-old boy with Lesch-Nyhan syndrome, who severely injured himself on his tongue. At first, conservative treatment using soft mouth guard was considered, but it could not prevent trauma on his tongue. Therefore, extraction of the lower anterior and posterior teeth was carried out.

      • 항결핵 6개월 단기요법의 성과 고찰

        서지원,정연채,김남재,홍석철,김주옥,김선영,노흥규 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

        To evaluate the effect of 6-month short term antituberculosis chemotherapy with INH, Rifampin, Ethambutol, and Pyrazinamide(2HREZ/4HRE) in the patients with pulmonary and/or extrapulmonary tuberculosis, the authors prescribed 2HREZ/4HRE regimen in 79 tuberculosis patients for 6 months with measuring the sputum staining for AFB, chest X-ray findings, recurrence rates and possible side reactions of the treatment. The result were as follow; 1. Pulmonary Tuberculosis 1) Among the 56 pulmonary tuberculosis patients who had taken 2HREZ/4HRE regimen. 32 patients showed initial positivity in sputum AFB smear stain(57.2%). Negative conversion occurred usually within 2 months after initiation of chemotherapy and the mean period of negative conversion was 1.4 months. 2) Among the 56 pulmonary tuberculosis patients, chest X-ray finding changed in 41 patients (37.21%). From these 41 patients 39 patients showed continuous improvements in chest X-ray finding, though 3 patients showed initial aggravation in spite of continuous medication. The remainder 2 cases aggravated due to the failure of treatment. 3) Treatment failure occurred in 2 patients (3.57%) during the chemotherapy among 56 patients of pulmonary tuberculosis and they were infected with secondary drug-resistant strains of M. tuberculosis. 2. Extrapulmonary tuberculosis. Among 8 patients with tuberculous pleurisy and 15 patients with superficial tuberculous lymphadenitis, there were no evidence of treatment failure after completion of antituberculosis chemotherapy for 6 months with 2HREZ/4HRE regimen. 3. Follow-up study was performed from 6 months to 50 months after completion of antituberculosis chemotherapy and the relapse was not noted in both pulmonary and extrapulmonary tuberculosis patients group during this period. 4. Serum AST/ALT elevated in 9 patients(11.4%) during the treatment and this occurred usually within 3 months after the initiation of antituberculosis chemotherapy. However treatment interruption occurred in 2 patients (2.5%) due to the development of hepatitisone due to drug-induced hapatitis and the other due to type B viral hepatitis. In conclusion, we could find this 2HREZ/4HRE 6-months short-term antituberculosis regimen is effective and could be recommanded as a promising regimen for the treatment of tuberculosis.

      • KCI등재후보

        불산 제조업체 근로자의 골밀도 변화에 관한 조사

        김지용,임현술,정회경,이현경,강흥식 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.1

        Hydrofluoric acid is one of strongest irritating, corrosive and poisonous inorganic chemicals. The most significant chronic consequence of excessive fluoride exposure is the disorder of skeletal system and connective tissue. The first stage of osteofluorosis consists of an increase in the density of flatbone such as pelvic bone and vertebral bones, with coarseness and blurring of bone trabecular. Therefore we wanted to observe the change of the bone density among workers exposed to hydrofluoric acid. Questionnairs and radiological investigations were performed for 39 hydrofluoric acid manufacturing factory worker sexposed to hydrofluoric acid. And then authors checked urinary fluoride level by fluoride ion method. The radiographs were doubly read by two radiologists for reliability. The results were as follows; 1. There was a significant difference in urinary fluoride level(p<0.01), but not in age, in tenure(p>0.05) among workers by the job title. 2. By the two radiologists, eight cases were read as bone fluorosis. The prevalence rate of bone fluorosis was 20.5%. 3. There was not a significant difference in general characteristic such as age, tenure and in muculoskeletal signs and symptoms between the fluorosis group and the normal group. 4. However, a close relationship between the occurence of the change of bone density and the degree of fluoride exposure such as burn was found. The difficulties in diagnosing fluorosis result from the questionable sensitivity of x-ray techniques and from the non-specific associated signs and symptoms. A quantitative method such as densitometry to assessosteosclerosis and bone structure alteration and a follow-up study are needed.

      • 폐경 후 자궁 출혈과 내막암에 관한 상관관계

        오영림,김흥열,정민형,지용일 고신대학교 의과대학 2011 고신대학교 의과대학 학술지 Vol.26 No.1

        OBJECTIVES: To investigate correlation between risk factors of endometrial carcinoma and histopatholgic findings of endometrium. METHODS: We reviewed medical records of 148 postmenopausal women with abnormal uterine bleeding, who underwent endometrial biopsy from January 2009 to April 2010. Women who had hematologic disease, or had non-uterine pelvic diseases were excluded. Hormone therapy was performed in indicated subjects. Age, body mass index (BMI), associated diseases, endometrial thickness checked by transvaginal sonography, whether hormone therapy was used were reviewed according to endometrial histopathology. RESULTS: Mean age of the subjects was 58.9 +/- 8.4years old. Among the endometrial histopathologic findings, atrophic endometrium was the most common finding (32.7%), followed by hyperplastic endometrium (17.8%), endometrial carcinoma (10.4%), and endometrial polyp (9.2%). BMI was not correlation of the prevalence of endometrial carcinoma and endometrial hyperplasia. Mean endometrial thickness was 9.8 +/- 5.56 mm, while it was 14.0 +/- 5.89 mm in endometrial hyperplasia, and 16.0 +/- 6.56 mm in endometrial carcinoma. The prevalence of endometrial cancer was high in those whose endometrial thickness was more than 10 mm (P < 0.001). The prevalence of endometrial hyperplasia in those whose postmenopausal bleeding was related to hormone therapy was higher than of women in whom hormone therapy was not performed. However, there were no statistical significance. CONCLUSIONS: Postmenopausal bleeding must be considered as indicative of malignant disease until proven otherwise. Endometrial biopsy should be performed to exclude endometrial carcinoma in postmenopausal women whose endometrial thickness measured by transvaginal sonography is thick.

      • 水産專門大學 漁業科 敎育課程 開發硏究

        裵錫悌,宋之浩,李吉來,鄭興基,洪聖根,趙鳳坤,朴種洙 군산대학교 1983 群山水産專門大學 硏究報告 Vol.17 No.1

        In order to develop the curriculum of the fishery department in the fisheries Jr. college, We have collected and analyzed the domistic and foreign data adquated to the fishey department under the international trend, also we gathered the opinion from the inquiring paper investigation and consultation to the industrial field, concerned college and graduate during the 6 month from September 1982. The fishery department curriculum in fisheries Jr. college will be industrialized with the concerned technics and knowledge in relation to speciality of maritime affairs. Accordingly, we have developed the adquate curriculum which is practical and can be cultivated the technician to adopt in the industrial society.

      • 鮟鱇網 漁具 漁法의 改良에 관한 硏究(Ⅱ) : 展開帆을 이용한 改良漁具 試驗(豫報)

        李吉來,宋之浩,朴鍾洙,徐萬錫,趙鳳坤,朴正鎬,洪聖根,鄭公炘,裵錫悌,鄭與基,金鎭乾 군산대학교 1980 群山水産專門大學 硏究報告 Vol.14 No.1

        Ordinarily stow net fisheries was used by floater beam and sinker beam for the purpose of spreading the mouth of net. But it was not only iuconvenient and dangerous but much defective. In this thesis, we have studied fundermental experiment of the improved stow net fishing gear using head rope, ground rope and otter sail instead of floater beam and sinker beam. From the result of this experiment, it has been succeeded for fishing work to achieve basically without any difficulty. The results obtained in this study were as follows. 1) The resistance of fishing gear was estimated R≒7V2 as possible as it is taken greatly. (R: Resistance V: the rate of current) 2) The interval of otter sail was spreaded smoothly. Being in normal condition, it was maintamed the width 37-38m. It was heared comparison with net mouth of ordinary gear, and the shearing force was enough. 3) The height of mouth was lower than we have anticipated to and seemed to have the supplement of buoyancy. But according to increasing the rate of current, the lowness of mouth height was little affected. 4) The height of otter sail was decreased at the rate of 30% by the rate of current, on the contrary, the height of wing was not decreased owing to sufficient buoyancy, 5) The adjustment of extention length of hanging wire(connected with fishing boat) and raising wire(with otter sail) was great important problem and it must be dealed with the most moderatly because of a corelation between the spreading of fishing gear and catching ability. 6) On the depth of 30m, it was taken 25 minuits to cast anchor and lines, 20 min cast net, 24 min haul net, 45 min haul lines and heave anchor, respectively. 7) The improved stow net with otter sail was cleared up the defects and difficult problems in ordinary gear using floater beam and sinker beam, and it have more advantages of fishing work than ordinary one. But there were involved in lots of problems in details to solve in the future.

      • KCI등재

        한국인 정신분열병과 HLA-DRB1 대립유전자의 관련성

        황나영,김종원,오흥범,조지희,오선영,홍진표,박종익,이동은 大韓神經精神醫學會 2000 신경정신의학 Vol.39 No.5

        연구목적: 유전이 정신분열병의 중요한 원인이라는 것은 널리 인정되어 왔다. 본 연구는 한국인 정신분열병과HLA-DRB1 유전자좌와의 관련성을 알아보고 외국인 대상의 보고들과 비교함으로써 한국인 정신분열병의 유전적 특성을 밝히고자 시행하였다. 방법: 정신분열병 환자 70명을 대상으로 HLA-DRB1 대립유전자를 고해상도 수준까지 분석하였다. 저해상도 수준의 HLA-DR결과는 정상 한국인 2,000명의 연구 보고와 비교하였으며 고해상도 수준의 HLA-DRB1 결과는 정상 한국인 229명의 연구 보고와 비교하였다. 결과: 저해상도 수준에서는 HLA-DR11이 정신분열병 환자군에서 9.0%, 정산인에서는 3.8%의 빈도를 보여 환자군에서 통계적으로 유의하게 높은 빈도를 보였으며(p=0.005), 고해상도 수준에서는 HLA-DRB1*1101이 환자군에서 9.0%로 정상인의 1.8%보다 유의하게 높은 빈도를 보였다(p<0.001). 결론: 본 연구에서는 한국인 정신분열병과 HLA-DR11(HLA-DRB1*1101)이 양적 상관관계를 보여 백인에서 DR4와 부정적 상관관계를 보인 결과나 일본인에서 DR1(DRB1*0101)과 양적 상관관계를 보인 결과와 상이하였다. 이러한 한국인 정신분열병 환자의 유전적 특성은 가족연구 혹은 더 많은 수의 환자를 대상으로 한 관련연구를 통하여 재확인되어야 할 것이다. 중심단어:정신분열병·HLA-DRB1·관련연구. Objective: A genetic predisposition is widely accepted in schizophrenia. This study was intended to fine any association of HLA-DRB1 alleles with korean schizophrenics and thereby compare the results of other ethni groups. Method: The subjects were 70 unrelated Korean patients. Low and high resolution typing of HLA-DRB1 alleles were performed. The comparison groups were 2,000 unrelated healthy Koreans for low resolution HLA-DR and 229 unrelated healthy Koreans for HLA-DRB1 alleles. Results: Gene frequencies of HLA-DR11(patients 9.0%, healthy control 3.8%, p=0.005) and HLA-DRB1*1101(patients 9.0%, healthy control 1.8%, p<0.001) were significantly higher in Korean schizophrenics. Conclusion: The frequency of HLA-DR11(HLA-DRB1*1101) is significantly higher in Korean schizophrenics than in healthy Koreans. HLA-DR4 and HLA-DR1, which were known to be associated with Caucasian and Japanese schizophrenics, respectively, did not show statistical association with Korean schizophrenics. This association need to be reassured though further studies with families or association study with larger numbers of subjects. KEY WORDS:Schizophrenia·HLA-DRB1·Association study.

      • 호흡기감염증에 대한 Cefuroxime Axetil(Zinnat�)의 임상효과

        김주옥,홍석철,김남재,서지원,김선영,노흥규 中央醫學社 1991 中央醫學 Vol.56 No.2

        To evaluate the efficacy and safety of Zinnat in patients with respiratory tract infections, 20 patients were treated with Zinnat (250 mg b.i.d). Among 20 cases, 5 cases had pneumonia, 5 cases exacerbation of chronic bronchitis, 4 cases acute bronchitis, 3 cases bronchiectasis with infection, and acute tonsilitis, bronchial asthma with infection and emphysema with infection 1 case, respectively. The response was cure in 12 cases, partial response in 6 cases and no response in 2 cases. There were no significant clinical and laboratory side effects except dyspepsia and nausea (1 case) and diarrhea (1 case). Zinnat was considered to be useful agent against bacterial respiratory tract infections.

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