피로크랙 전파모델에 따른 고압 터빈로터의 수명예측에 관한 연구

정순억,김재동 慶尙大學校 1997 論文集 Vol.36 No.-

It is very important for the turbine rotor steel to predict residual life from a viewpoint of safety under using conditions(including cold, warm and hot start), but the research report of this part is rarely found in the country. So, in this study the investigation for the maximum stress and temperature distribution of Y-Fossil HP rotor was confirmed by FEM(finite element method) analysis program, ROSTRESS and ROTEMP. The life consumption by creep and fatigue phenomenon of crack was considered. In the rotor life prediction program-ROLIFE developed, Paris and Forman rule were used and compared with each other as the prediction for the fatigue crack propagation, and the remaining rotor could be calculated as the sum of fatigue and creep damage by Miner rule.

기종성 신우신염 1례

이재욱,구정태,서정일,양창헌,이정호,이동철,이영현,이활,이경섭 동국대학교 경주대학 1997 東國論集 Vol.16 No.1

기종성 신우신염은 주로 당뇨병환자나 폐쇄성 요로질환을 가진 환자에 발생하며 특징적으로 신실질 및 그 주위조직에 가스를 형성하면서 심한 조직괴사를 일으키는 매우 드문 급성 화농성 신감염으로 사망률이 높은 질환이다. 이 질환은 1989년 Kelly와 MacCallum에 의해 처음 보고된 이래 외국문헌에 약 90례 정도가 보고되어 있으며 국내에는 28례가 보고되어 있다. 수액 및 전해질 보충, 인슐린 투여를 통한 적절한 혈당조절 및 항생제 투여등의 내과적 치료와 절개배농 및 신적출술등의 수술적 치료 방법이 있다. 내과적 치료로 가스의 감소가 없는 경우에는 즉각적인 수술적 치료를 시행하여야하므로 이 가스변화에 대한 추적관찰이 중요하다 하겠다. 본 저자들은 당뇨병환자에서 발생한 기종성 신우신염 1례를 내과적 요법을 치험하였기에 문헌고찰과 함께 보고하고자 한다. Emphysematous pyelonephritis is rare, life-threatening infection of the renal parenchyma and perirenal tisseue. This disease is characterized by the production of intrarenal and perirenal gas and is frequently encountered in patients with diabetes mellitus or urinary obstruction. We experienced a case of emphysematouse pyelonephritis in a 62 years old women with poorly controlled diabetes mellitus who had been managed with medical theraphy. So we report this case with a review of the referenced literatures.

보건관리대행 기관의 사업장내 진료에 대한 근로자 요구 및 실시 의향

원종욱,송재석,정선아,박화미,노재훈 大韓産業醫學會 2001 대한직업환경의학회지 Vol.13 No.1

목적 : 본 연구에서는 보건관리대행 사업에 있어 사업장내 진료에 대한 수요와 보건관리대행기관의 방문진료 제공에 대한 의향을 조사하여 사업장내 진료에 대한 욕구를 파악하고, 이를 토대로 사업장내 진료에 대한 기초적인 자료를 제공하는데 목적이 있다. 방법 : 근로자들의 의료이용 행태와 방문진료에 대한 요구도를 파악하기 위해 167개 보건관리대행 사업장의 사업주와 보건담당자, 그리고 1,350명의 근로자에게 설문 조사를 실시하였고, 사업주 121명(72.5%), 보건담당자 145명(86.8%), 근로자 816명(60.5%)이 응답하였다. 일차진료의 제공 가능성을 파악하기 위해서 전국의 66개 보건관리대행기관의 의사와 간호사 및 행정책임자에게 우편 설문조사를 실시하여 의사 31명 (47.0%), 간호사 38명(57.6%) 및 행정책임자 34명(51.5%)이 응답하였다. 결과 : 보건관리대행 사업을 수행하고 있는 의사의 87%와 간호사의 94%가 보건관리대행 업무를 담당하면서 많은 근로자들로부터 투약 등 진료를 요구받고 있었고, 100 %의 간호사와 행정책임자 94%, 의사의 76 %가 보건관리대행 사업에서 진료를 수행하는 것이 필요하다고 생각하고 있었다. 한편사업주의 85 %, 보건관리 담당자 86 %와 근로자81 %가 보건관리대행기관에서 사업장내 진료를 시행 할 때 이를 수용하겠다고 응답하였다.결론 대다수의 근로자와 사업주가 보건관리대행기관의 진료를 요구하고 있었고, 보건관리대행 기관의 의사와 간호사가 사업장에서의 진료를 수용할 의향이 있고, 직업성 뇌심혈 관계질환의 예방 등 필요성이 인정된다면 보건관리대행 의사의 사업장내 진료를 인정해야 한다고 생각된다. Objectives : This study was performed to survey worker's demands for worksite medical care and agency's intention for offering worksite medical care in Group Health Service Agency. Methods : One study subjects were employers, workers and office personnels in 167 factories. They were asked for medical care utilization behavior and worksite medical care demand. 121 employers(72.5%), 145 office personnels(86.8%) and 816 workers(60.5%) answered the questionnaire. The other subjects were doctors, nurses and administrators in 66 Group Health Service Agencies nationwide. They were asked for intention of offering worksite medical care in Group Health Service Agency through the mail survey. 31 doctors (47.0%), 38 nurses (57.6%) and 34 administrators answered the questionnaire. Results : 87 percentage of doctors and 94 percentage of nurses had experiences of being requested to prescribe and laboratory examination. All nurses, 94 percentage of administrators and 76 percentage of doctors thought that it was necessary to give medical treatment at worksite. Also in worksite 85 percentage of employers, 86 percentage of office personnels and 81 percentage of workers answered that they accepted the worksite medical care when it would be given. Conclusions : Worksite medical care should be permitted because almost of all workers and employers requested worksite medical care, and doctors and nurses in Group Health Service Agency were willing to give worksite medical care and there was necessity to prevent occupational cerebrovascular disease.

소음 특수건강진단 1차검사의 민감도와 특이도에 미치는 일과성 역치 상승과 주변환경 소음의 영향

원종욱,방문규,송중호,정선아,송재석,노재훈 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2

Object : This study was performed to increase the sensitivity and specificity for screening the examinee of second hearing test. Methods : Study subjects were 219 workers who exposed more than average 80dB. They were taken the hearing test two times, before noose exposure and at 1 hour to 4 hours after worksite noise exposure. To investigate the ambient noise workers who were taken the hearing test in the test room which ambient noise was less than 45dB were classified Group I and the others were classified Group II . To calculate the sensitivity and specificity we made it gold standard whether worker had noise induced hearing loss. Results : Difference of hearing loss between before and after noise exposure for left and right ear was 11.4 dB and 11.7 dB respectively at 500 Hz, 8.7 dB and 9.6 dB at 1,000 Hz, 6.3 dB and 6.9 dB at 2,000 Hz and 6.9 dB and 7.4 dB at 4,000 Hz In Group I. That for left ear and right ear was 5.8 dB and 4.9 dB at 500 Hz respectively, 5.4 dB and 6.4 dB at 1,000 Hz, 6.3 dB and 5.3 dB at 2,000 Hz, and 5.5 dB and 5.8 dB at 4,000 Hz in Group II. The sensitivity was 100 in both Groups and the specificity was increased to 58.3 and 71.8 in Group I and Group II respectively until 10 dB was deducted from hearing level at 1,000 Hz and 4,000 Hz. Conclusion : When the screening hearing test was performed at worksite, we might deduct 10 dB from measured hearing level to increase the specificity without reduction of sensitivity.

경수 손상의 임상적 분석

김정수,강재규,도종웅,김기욱,김상진 최신의학사 1991 最新醫學 Vol.34 No.1

도서지역 특기적성교육 운영실태와 개선방안에 관한 연구

이재화,정회욱 木浦大學校敎育硏究所 2005 교육연구 Vol.18 No.-

본 연구는 정규 학교수업이 끝난 후에 비어 있는 학교의 시설과 공간을 활용하여 학생들의 소질과 적성을 계발하고 잠재력을 발연시키는 다양하고 흥미 있는 특기·적성교육의 운영 실태 파악과 개선 방안을 제시하는데 의의가 있다. 이러한 연구목적을 달성하기 위하여 구체적으로 특기·적성교육목적 및 필요성의 실현정도, 특기·적성교육의 내용과 방법, 특기·적성교육의 지도교사 운영, 특기·적성교육의 효과 및 평가 영역에 관한 내용을 전남 서남부 도서지역을 대상으로 146명의 중학교 교사로 부터 설문조사를 실시하였다. 자료 분석 결과를 요약하면 다음과 같다. 첫째, 특기적성교육의 필요성과 목적으로 대부분의 교사들이 필요하며 특기지도라고 응답했다. 둘째. 특기·적성교육의 내용 선정은 학생과 학부모의 요구가 높게 반영되고 교육방안에 대해서는 실험실 습식 교육이 적당하며 교과관련 영역이 포함되어있다고 응답했다. 셋째, 지도교사가 느끼는 가장 큰 애로사항에 대해서는 전문성 부족이 높게 나타났는데 성별에서는 남교사가, 교육경력별에서는 11년 이상 된 교사들이 더 전문성 부족을 이유로 들었다. 넷째, 특기·적성교육의 전반적인 효과가 있고 특기신장 목표영역이 높게 나타났다. 이러한 연구 결과에 비추어 볼 때, 특기·적성교육의 본래의 목적과 취지에는 충분히 공감하면서도 현실적으로 역부족인 부분을 활성화시키기 위해서는 교과관련과 비교과 관련 특기·적성 교육활동에 필요한 교육시설 등의 교육여건을 구비해야 하며, 학부모의 평가 및 참여를 유도해야 한다. 또한 교사의 업무 부담 경감과 학생의 특기·적성 교육활동에 적극적·자발적 참여를 유도하고, 다양한 방과 후 교육프로그램을 개설하고 자질 있는 강사를 확보하기 위해서도 특기·적성 교육활동에 필요한 운영비는 지원을 확대해야 한다. This study is worth analyzing practices of special Ability and Aptitude Education in the islands area and suggesting their improvements in order that they are firmly established in this area. For the purpose of this study, the author was investigated for teachers in the 25 middle schools located in the southwest islands of Cheonnam province(Shinan, Chindo, Wando) Measuring tool is a questionnaire, which is composed of accomplishment degree of its necessity and the purpose of special ability and Aptitude Education, its contents and method, management of the teachers in the charge of it, its effect and evaluation. The results are as following. First, special ability and aptitude promoting in each school be managed for students' capability development as its original purposes, and in order to manage the carious programs students and their parents demand, and th reduce private tuition fee, each school must manage higher level education. Above all for maintaining this, parents' trust in the special Ability and aptitude must go ahead. Second, each school need teach individually through level management or supplementary·advanced class and draw up curricular for developing students' creativity and variety. We are suffering from the lack of carious programs and teachers in charge that parents demand, but we will be able to expect more educational rising efficiency of we use human·material resources of the community much better. Third, school authorities should select able inner teachers and outer part-time teachers in change of special ability and Aptitude. Especially in the islands area school must prepare for the management method reflecting in the lack of human resources and some reaching problems according to long distance, the lack of teachers results in less fee than the other areas. Fourth, school authorities should try to regain the confidence in the public education through the special ability and Aptitude Education. For this, each school should offer teachers chances to train for them selves and evaluate in many ways like opening their classes and presenting their cases and connect with the festivals of teenagers. And each school need th evaluate it frequently and give a feedback so as to reflect the results of all the evaluations in the next term management of special ability and Aptitude Education.

하악골에 발생된 Low grade 골육종:증례보고

조현이,정종철,김호성,최재욱,성대경,서지훈,김성범,이계혁 大韓顎顔面成形再建外科學會 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.1

Osteosarcoma is a primary malignant tumor arising most often in the long bone, but rare in jaw bone. Especially osteogenic sarcoma of the mandible is a rare tumor, comprising less than 0.5% of all head and neck tumors. Osteosarcoma occurs cheifly in young persons, and presenting very survival rates. Histopathologically this tumor can be classified three types, osteoblastic, fibroblastic, chondroblastic and classified from low grade to high grade by anaplasia or mitosis of the tumor cells. Sometimes, the exact diagnosis of osteosarcoma is difficult especially in low grade osteosarcoma, even if clinical or radiographical findings suggest to osteosarcoma. So suspcious to malignant bone tumor in clinical or radiological findings, biopsy should be taked from deep portion and multiple area, and sharing the patient history and radiographs with pathologist will assist in the development of the diagnosis. We report a case of low grade osteosarcoma on the mandible initially difficulty in accurate diagnosis. The patient visited our hospital for routine dental treatment but radiographic findings displayed ill-defined radiolucency with osteoid formation on the mandible. Final diagnosis was difficulty in initial biopsy but subsequent biopsy taked from deep portion presented infiltrative growth and mitosis of the tumor cell in some area with small osteoid bone formation, so we could reach final diagnosis as low grade sarcoma. We treated this patient with bloc resection of the mandible and immediate reconstruction with iliac corticocancellous block.

그람양성구균에 대한 Teicoplanin과 Vancomycin의 시험관내 항균력

최태열,김경숙,전용관,서일혜,김정욱,이웅수,안정열,김홍석,정재용,최효선,김덕언,유진우 대한감염학회 1994 감염 Vol.26 No.1

An increasing frequency of methicillin resistant S. aureus(MRSA), methicillin resistant coagulase negative staphylococci(MRCNS) and Enterococcal infection have been observed in recent years. Teicoplanin is a new glycopeptide antibiotic obstained from the Actinoplanes teicomycetius. The molecular structure and spectrum of antimicrobial activity of teicoplanin is simillar to those of vancomycin, and has been reported to have an excellent in vitro and in vivo effect against various gram-positive infections. Therefore, we evaluated the in vitor susceptibility of gram positive cocci, such as, S. aureus, coagulase negative Staphylococci(CNS), and Enterococci to teicoplanin and vancomycin. The total 253 strains consisted of MSSA(40), MRSA(53), MSCNS(47), MRCNS(48), and Enterococci(65). They were assayed by disc diffusion and agar dilution. During the study, 57% of S. aureus and 49% of CNS showed resistance to methicillin. The inhibitory diameter of teicoplanin was 15-20mm in MSSA, 12-19mm in MRSA, 13-24mm in MSCNS, 11-23mm in MRCNS, and 15-22mm in Enterococci respectively, and showed sensitivity in all but 8 strains(3.2%). The range of the minimum inhibitory concentration (MIC) of teicoplanin to MSSA, MRSA, MSCNS, MRCNS and Enterococci were 9.12-2.0㎍/ml, 0.25-2.0㎍/ml, & 0.25-32㎍/ml, 0.12-1.0㎍/ml respectively. One case of S. haemolyticus was resistant to teicoplanin (32㎍/ml) by the agar dilution method. Eight minor (3.2%) and one major(0.4%) error was observed when the MIC and disk diffusion data were correlated with teicoplanin. As for vancomycin the inhibitory diameter was 17-21mm in MSSA, 15-21mm in MRSA, 18-26mm in MSCNS, 18-25mm in MRCNS, and 16-22mm in Enterococci respectively. The range of the MIC of vancomycin to MSSA, MRSA, MSCNS, MRCNS, and Enterococci were 0.25-1.0㎍/ml, 0.25-4.0㎍/ml, 0.5-2.0㎍/ml and 0.5-2.0㎍/ml respectively. One minor error (0.4%) was seen with the vancomycin disk. The MIC90 of MSSA and MRSA exhibited the same results in teicoplanin (1.0㎍/ml, 1.0㎍/ml), and vancomycin(2.0㎍/ml, 2.0㎍/ml). MSCNS and MRCNS exhibited greater MIC90 with teicoplanin(4.0㎍/ml, 8.0㎍/ml) than vancomycin(2.0㎍/ml, 2.0㎍/ml). Incontrase Enterococci were more susceptible to teicoplanin(0.5㎍/ml) than to vancomucin (2.0㎍/ml). Results from this analysis indicated that both teicoplanin and vancomycin were very excellent for gram positive infections, especially those resistant to methicillin.

상악 유전치부의 치간공간과 인접면 우식에 관한 조사연구

김진영,이광희,라지영,안소연,정승열,임경욱,반재혁 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.3

본 연구는 상악 유전치부의 치간공간과 인접면 우식의 상관관계를 평가해보고자 하였다. 익산에 거주하는 만3-7세의 어린이 555명을 대상으로 하였으며 탐침이 통과하는지 여부로 치간공간이 있음과 없음으로 분류하였고 와동이 형성되었거나 법랑질 표면이 연화되었을 경우 인접면 우식이 존재하는 것으로 판단하였다. 연구 결과 다음과 같은 결론을 얻었다. 1. 상악 유전치부의 치간공간은 영장류 공간이 77.4%, 발육공간이 유측절치와 유중절치 사이에서 54.4%, 양유중절치 사이에서 39.0%로 나타났다. 2. 인접면 우식발생율은 우측유견치가 6.3%, 우측유측절치가 14.7%, 우측유중절치가 33.5%, 좌측유중절치가 33.7%, 좌측유측절치가 16.0%, 좌측유견치가 4.7%로 나타났다. 3. 치간공간의 수가 많을수록 상악 유전치의 우식발생율은 낮아졌으나 그 상관관계(r=0.024)는 미약하였다. 4. 상악 유전치부에 공간이 존재하지 않을 경우 존재할 때 보다 평균 우식발생율이 높았으며, 치간공간이 전혀 존재하지 않는 경우 한 곳이라도 치간공간이 존재하는 경우보다 평균 우식발생율이 2배 이상 높은 것으로 나타났다. The purpose of this study was to assess the relationship between interdental spaces and proximal caries in maxillary anterior primary teeth. 555 children aged 3-7 inhabit in Iksan were divided into two groups, depending on the presence of interdental space which was detected by a dental explorer. They were determined to have proximal caries if cavity was formed or the enamel surface was softened. The results were as follows : 1. Regarding interdental spaces, 77.4% had primate spaces; 54.4% had developmental spaces between central and lateral incisor, and 39.0% between central incisors. 2. Interproximal caries incidences in right primary canine, lateral incisor, and central incisor were 6.3%, 14.7%, and 33.5%, respectively. Also interproximal caries incidences in left primary central incisor, lateral incisor, and canine were 33.7%, 16.0%, and 4.7%, respectively. 3. Children with more interdental spaces had less caries incidence, but the relationship was weak(r=-0.024). 4. The mean caries incidence was higher in absence of interdental space of maxillary primary incisors than in presence of space. The mean caries incidence with no interdental space was twice as high as that with presence of interdental space.

Comparison of clinical characteristics between never-smokers and ever-smokers in female lung cancer patents: Evaluation of Korean Central Cancer Registry Data

( Jeong Uk Lim ),( Chan Kwon Park ),( Solji Han ),( Chang Min Choi ),( Chi Young Jung ),( Deog Gon Cho ),( Jae Hyun Jeon ),( Jeong Eun Lee ),( Jin Seok Ahn ),( Yeongdae Kim ),( Yoo-duk Choi ),( Yang-g 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.-

Purpose: The aim of this study was to compare clinical characteristics and prognosis between never and ever-smokers in female patients with lung cancer using nationwide registry in Korea. Materials and Methods: The Korean Association for Lung Cancer developed a registry in cooperation with the Korean Central Cancer Registry, and surveyed about 10% of lung cancer cases. For this first survey of cases diagnosed in 2014, cases were selected through a systematic sampling method. Results: Total of 2,621 lung cancer patients were surveyed and 744 female lung cancer patients were selected. After excluding 8 patients without data on smoking history, 736 patients were evaluated in this study. Among them, 644 (87.5%) were never-smokers, and 92 (12.5%) were ever-smokers. Median survival was compared between the two groups: median survival was not reached for the never smoker group, while it was 14.9 months for the ever-smoker group (P<0.001). During the study period, there were 635 non-small cell lung cancer (NSCLC), and 52 small cell lung cancer (SCLC). Among 635 NSCLC patients, 569 patients were never-smokers and 66 patients were ever-smokers. The ever smoker NSCLC group had significantly lower proportion of stage I patients and EGFR mutation when compared to the never-smokers (27.3% vs 41.7%, P=0.004, and 34.2% vs 50.3%, P=0.001, respectively). Among 469 patients with NSCLC, epidermal growth factor receptor (EGFR) mutation group (n=230) had higher proportion of clinical stage I (40.4% vs 29.1%, P=0.03), and patients who received targeted therapy as 1st line treatment (30.7% vs 1.8%, P<0.001) than wild-type group (n=239). From multivariable analysis for survival in 269 stage IV NSCLC patients, receiving only supportive care, and EGFR wild-type were significant predictors for shorter survival. Conclusion: From this nationwide cancer registry data, majority of female lung cancer patients were never-smokers, and showed different clinical characteristics and prognosis compared to ever-smoker patients.