鐵筋 Concrete 建物의 壽命에 對한 批判的 提案

崔俊植 大田工業高等專門學校 1969 論文集 Vol.4 No.-

Accurate judgement cannot be available for the life of reinforced concrete building, to the exclusion of objective opinion on the judgement of its life. That is to say that, even if the life of structural frame of the building is permanent, its substantial functional requirement in connection with planning, equipment or facilities have a strong influence on the life of the building. In addition to the above, it partially depends on the superannuation of the attached structure such as steel sash, anchors, roof drain etc. Thus I have analized the measure on the life of reinforced concrete building and some suggestion are made,

住宅의 保溫的 設計에 對한 考察

崔俊植 大田工業高等專門學校 1970 論文集 Vol.6 No.-

우리 나라의 기후 조건에 비하여 우리들이 살고 있는 집들은 너무도 보온적인 면에 소홀히 하는 경향이 있다. 예를 들면 천장에 얇은 종이반자를 만든다든지 벽 두께가 불과 6~10 cm정도 밖에 안 되며 그것도 기둥과 벽 사이에는 틈새가 많아서 방안에서도 밖이 내다 보일 정도의 집들이 있는 것이다. 그렇기 때문에 소위 외풍이 심한 집들이 대부분이며 벽면에 성에가 끼어 썩는 현상을 얼마든지 볼 수 있다. 따라서 겨울에는 춥고 여름에는 대개가 더위에 시달리게 된다. 물론 이와 같은 현상은 강제적인 요인도 있겠으나 난방비의 불경제 및 건물의 수명 뿐만 아니라 우리들의 건강을 위해서도 주택의 보온성이란 결코 등안시 할 수 없는 중요한 문제인 것이다. 과거 목조건물 만을 짓고 살던 때보다 현재는 국민경제 의 향상 및 건축재료의 발달로 인하여 많은 개량과 향상을 가져왔으나 아직도 지역적 기후 조건을 고려치 않고 온난한 지방과 추운 지방의 보온적 구조가 하등의 다른 점이 없이 대동소이한 구조 형태로 이루어지고 있는 점을 볼 때 건축 설계사는 다시 한 번 고려해야 할 문제라고 생각한다. 이러한 점등으로 미루어 볼 때 필자는 주택의 보온적 설계에 대한 하나의 지표로서 여기에 그 고찰을 펴 본 것이다. Our houses are apt to be built without considering the Keeping warm against the unseasonable climate in Korea. For instance, there are a lot of houses which have so thinly papered ceiling and only3-4 inch thick walls that the outside is to be seen through the splits between the poles and the walls. Most of them give free passage to draughts, and the frostworks and musts on the walls are often to be found. In such houses, it is very cold in winter and very hot in summer. These houses are built as such, owing to the pecuniary embarrassment, but the keeping warm in the houses brings a very important problem for our heath and the long life of the building. There brings much progress and reforms in building the houses according to the improvements in building material, but yet, the houses are built without considering the condition of climate detween the warm and the cold districts. In all these respects, the designers should reconsider in designing them, for which I presented an indication in this paper.

두부외상환자에서의 예후인자

최성혁,문준동,김수진,문철규,이성우,홍윤식 대한응급의학회 2001 대한응급의학회지 Vol.12 No.2

Background: Predicting outcome after head trauma is of great interest for clinicians, especially in the early stage. It may provide a basis for therapeutic strategies and may be helpful to select different approaches. But, reliable outcome prediction from head trauma is still unresolved. The purpose of this study is to determine which clinical parameters can be used effectively after an event of head trauma. Methods: In our study we studied head trauma patients who came to the Emergency department of Korea University Medical School Anam Hospital from the 1st of June 1998 to 31th of January 2000, looked into medical records, and studied the records in a retrospective manner. The head trauma patients were divied into two group, a) favourable outcome-related and b) unfavourable outcome-related. The two groups were then subdivided according to their sex, age, the mechanism of their injury, the time they came in, alcohol drinking, loss of consciousness, vomiting, pupil change, previous medical illness, associated injuries and were seperately compared and analyzed. And the factors affecting Glasgow Outcome Scale(GOS) were analyzed in the parameters of Injury Severity Score(ISS), Revised Trauma Score(RTS), Glasgow Coma Scale(GCS), motor score of GCS(mGCS), Marshall Computed Tomographic Classification(MCTC). Statistically, t-test and Mann-Whistney rank sum test using Jandel-sigma were used in the study and then were assessed in Chi-square analysis methods. The statistical significance was determined at a level of p less than 0.05. Results: The total of the head trauma patients, added up to 129 people, 99:males and 30:females. Among this sum, 99 patients showed a favourable outcome and 30 patients showed an unfavourable outcome at discharge. The causes of injury included: automobile accident in 42 cases; fallss in 26; assaults in 6; and accidental-slipping injury etc in 55 cases. 12 patients had bilateral unreactive pupils on admission, 2 had unilateral reactive pupils, and 113 had bilateral reactive pupils. Compared to the favourable outcome-related head trauma group, the unfavourable outcome-relared head trauma group had more history of loss of consciousness, unreactive pupils and tended to have previous medical illness. There were no difference in alcohol related, vomiting and associated injuries between two groups(favourable outcome-related head trauma group: unfavourable outcome-related head trauma group). Substantial difference were observed in GCS, mGCS, ISS, RTS, MCTC between two groups. Patients with unfavourable outcome had a significantly higher ISS, lower RTS, lower mGCS. After MCTC, patients with mass lesion had unfavourable outcome than patients with diffuse injury. Conclusion: Age, history of loss of consciousness, previous medical illness and unreactive pupil change are predictives of outcomes of head trauma patients with respect to Glasgow outcome scale. The lower GCS, lower RTS, lower mGCS, higher ISS, mass lesion based on CT scan provide poorer prognostic outcome in patients with head trauma. Use of prognostic factors thorough complete history taking and physical examination would provide useful prognostic information and facilitate improved therapeutic decision-malting in head-injuried patients.

木造化粧壁에 박은 못의 自然突出 防止에 關한 硏究

崔俊植 大田工業高等專門學校 1968 論文集 Vol.3 No.-

建築에서 乾式 壁構造인 널판壁이나 board 化粧壁에 박은 못(丸鐵釘)이 施工後 時日이 經過함에 따라 自然的으로 솟아오르는 現象을 우리는 자주 經驗하게 된다. 이러한 "못의 솟음" 은 部材 自體의 內的 및 外的 條件으로 因한 複雜한 變化過程에서 나타나는 것으로서 優雅하고 滿足하게 보여져야 할 壁 表面을 크게 損傷시키는 境遇가 많다. 이와 같은 問題는 些少한 것같이 생각이 되나 多年間 現場에서 施工을 擔當해 온 實務者라면 그대로 看過될 수 없는 重大問題라는 것을 切實히 느끼게 되며, 筆者 또한 過去 實務에 從事하고 있을 때 자주 逢着했던 難事였으며,그의 原因 및 豫防施工法에 對해서 다같이 腐心하고 있는 實情이다. 이러한 現場 實務者들의 隘路點에 對하여 우리는 아직도 確實한 結論을 提示해 주지 못하고 있다. 그래서 筆者는 이러한 諸 原因을 明白히 하기 爲하여 本實驗을 한 것이며 部材와 各種 못 사이에 일어나는 作用 및 性質 또는 現象을 觀察 測定하였다. 그 結果 只今까지 皮相的으로만 생각해 왔던 것과는 달리 木材가 徐徐히 乾燥되어 감에 따라 必然的으로 일어나는 收縮이 部材에 박힌 못의 深度에 따라 크게 作用한다는 것을 確證해 주었다. 여기에서 한 가지 附記해 둘 것은 이 實驗에 使用한 못은 KS D 3553 (일반용 철못)에 規定한 N 40, 45, 65, 75, 以外에 우리 國內에서는 生産되고 있지 않는 異形 못인 Heltically threaded(나사형)와 Longitudinally Grooved(胴部에 새로로 홈이 파져 있는 형)을 一部 製作하여 試圖한 點이다. 또한 筆者가 1964年에 實驗 發表한 "傾斜지게 박은 못의 保釘力에 關한 硏究" (大田工專學報 第2號 P. 119~P. 131)에서와는 달리 各種 못에 對한 保釘力의 比較를 아울러 實驗하였다. The surface of the wall is sometimes ruined by the nail driven on the wooden or finished wall which is one of the dry walls, because the nails appear as time goes by. This appearance is formed in the complicated process of transfiguration of the wood itself, and it has been one of the troubles for the persons concerned to solve. The trouble frequently confronted by me, when I was in charge of actually on-the-spot work, has made me study its protective measures, and my intention is to cut down extra work for the save of the working level personnel. At the same time, I have made an experiment on the resisting power of two kinds of nails: a regular one commonly used so far and a deformed one never used in korea. And the result of the experience shows that the latter is superior to the former.

원발성 후복막 점액낭샘암종 1예

지준호,이화정,박승찬,박정철,최은정,서혜진,이원식,이정림,배병조,손경락,이경희 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Primary retroperitoneal mucinous cystadenocarcinoma is a very rare malignancy, and little is known concerning its Pathogenesis, optimal treatment, and prognosis. A 29-year-o1d pregnant woman (21 weeks) Presented with abdominal discomfort CA 19-9, CA 125, and CEA were normal Abdominal CT scanning revealed a 19x15x13 cm retropentoneal tumor Exploratory laparotomy and tumor excision were performed. Mucinous retropentoneal implants were removed as completely as possible Histologically, the tumor showed focal areas of capsular invasion, but free resection margins The uterus and both ovaries were normal in appearance No adjuvant therapy was pursued. Six months later, Peritoneal and bilateral ovarian metastases were discovered. Hence, we report the details of this case of primary retroperitoneal mucinous Cystadeno-carcinoma and present a review of the literature.

폐동맥고혈압 환자에서 우심실압 파형과 폐동맥압의 혈관확장제에 대한 반응성의 관계

이준희,김용진,손대원,오병희,이병묵,박영배,최윤식 대한순환기학회 2003 Korean Circulation Journal Vol.33 No.11

중증 외상환자에서 염기 결핍수치의 유용성

문준동,김수진,문철규,최성혁,전정민,이성우,홍윤식 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: This study's objective was to determine the prognostic value of the base deficit measured in the emergency department(ED) and to determine whether base deficit can provide information not provided by advanced injury scoring system. Methods: This study was a retrospective analysis of data collected for two years. Thirty-two severe trauma patients who were admitted to the Emergency Department of Korea University Hospital were included in this study. The patients were divided into two groups: the normal base deficit group(-3 mmol/L to 3 mmol/L) and the elevated base deficit group(>3 mmol/L). The base-deficit value, age, sex, head injury, organ failure rate, and survival were considered, and the also Revised Trauma Score(RTS), Acute Physiology And Chronic Health Evaluation(APACHE II), and Injury Severity Score(ISS) were measured. Result: The elevated base-deficit group showed a lower survival rate and a higher organ failure rate compared to the normal base deficit group. Logistic Regression showed a strong association between base deficit and mortality rate. Among the previous injury scoring Systems(RTS, APACHE II, ISS), base deficit had the strongest correlation with RTS. By using base deficit value and the RTS together, we obtained a higher positive predictive value than that obtained by using base deficit or RTS alone. Conclusion: The admission value of the base deficit in the ED is a useful tool in predicting the outcome in severe trauma patients, and it can be an adjunct to previous injury scoring systems. As an advanced injury scoring System is developed in the future, the base deficit may have some significant role.

성인원외폐렴의 원인미생물에대한 전향적 다기관 연구 : 성인원외폐렴의 원인으로 세균의 역할을 중심으로

우준희,강재명,김양수,신완식,류진홍,최정현,김양리,정희진,어수택,박춘식,정문현,정기석,이찬주,류지소 대한감염학회 2001 감염 Vol.33 No.1

Background : Communite-acquired peumonia (CAP) is one of the leading causes of mortality and morbidity. Despite progress in diagnostic techniques and treatments, management of pneumonia remains challenging, because the precise etiology remains uncertain in as many as 49% of cases. The limitaions of identifying etiologic agents make it necessary to use empiric antibiotics in almost all patients, and furthermore emergence of antibiotic-resistant organisms pose difficulties to the selection of an empiric antibiotic regimen. For the optimal choice of empirical antibiotics, we should know the frequency of etiologic agents and antimicrobial resistance rates in the community. Methods : A prospective multicenter study of community-acquired pneumonia in Korea was carried out between May 1997 and April 2000. The microbiologic diagnosis was based on the results of sputum culture, blood culture and pleural culture. Results : Five hundred eighty eight cases of community-acquired peumonia in 562 patients admitted to the hospitals. The mean age was 59.9 with male predominance (58.3%), and 370 (63%) had underlyin gillness. The etiologic agents were identified in 38.3%, and the list of individual agents, in decreasing order, was Streprococcus pneumoniae (21.7%), Klebsiella pneumoniae (14.8%) Pseudomonas aeruginosa (9.8%), Staphylococcus aureus (9.5%), viridans group streptococci (5.7%), Enterobacter cloacae (4.2%), Hemophillus Influenza (3.8%), The rates of admission to the intensive care unit was 10.4%. The motality was 7.1%. Susceptible rates of S. pneumoniae to penicillin was 36.6% and showed multidrug resistant. Forty percents of S. aureus were methicillin-resistant S. aureus. K. penumoniae were susceptible to cephalosporin and quinolone. Conclusion : In Korea, S.pneumoniae is the most important agent causing community-acquired pneumonia. Susceptible rates of S. pneumoniae to penicillin was 36.6% and showed multidrug resistant. Gram negative bacteria such as K. pneumoniae, P. aeruginosa showed high incidence when compared with that of other countries. Most of them had underlying diseases including bronchiectasis and chronic obstructive pulmonary diseases. (Korean J Infect Dis 33:1∼7, 2001)

신농양에 동반된 척추 경막외 농양 1예

엄흥식,김준재,김현수,박영정,최상봉,박원도,김상현 인제대학교 2006 仁濟醫學 Vol.27 No.-

Spinal epidural abscess is an uncommon but readily diagnosable and treatable potential cause of paralysis and death. The incidence of spinal epidural abscess is approximately one to two cases per 10,000 hospital admissions in the United States. The symptoms of spinal epidural abscess are varied but include lower back pain, fever, local tenderness and neurological deficit, especially in such high risk groups as patients with diabetes, intravenous drug abuse, chronic renal failure, alcoholism, liver disease and immunocompromization. Infections of the epidural space originate from contiguous spread or via hematogenous routes from a distant source. Cutaneous sites of infection are the most common remote sources, especially in intravenous drug users. S. aureus accounts for most spinal epidural abscess infections, followed by streptococci and gram-negative anaerobes. We here report a case of spinal epidural abscess in renal abscess patient complaining of fever and back pain. A 71-year old female patient was admitted to epigastric pain and oliguria. She had been diagnosed as acute renal failure and treated with hydration. After third hospital days, she shows a persistent fever and drowsy mentality. Abdominal computed tomography demonstrated renal abscess. She was treated with intravenous antibiotics, third cephalosporin. Blood cultures and urinary culture revealed Escherichia, coli. After fourteenth hospital days, she developed back pain, muscle weakness and decreased sensation of lower extremities. Spine MRI demonstrated spinal epidural abscess with spinal cord compression. Surgical drainage with laminectomy was performed. After treatment of intravenous antibiotics and surgical drainage, she discharged with improved back pain and neurological symptom.

고온 유리의 프레스 성형 공정 시뮬레이션

지석만,최주호,김준범,하덕식 한국 항공대학교 항공산업기술연구소 2001 航空宇宙産業技術硏究所 硏究誌 Vol.11 No.-

This paper addresses a method for numerical simulation in the pressing process of hot glass. Updated Lagrangian finite element formulations are employed for the flow and energy equations to accommodate moving meshes. The model is assumed axi-symmetric and creep flow is assumed due to the high viscosity. Commercial software ANSYS is used to solve the coupled flow and energy equations. Moving contact points as well as free surface during the pressing are effectively calculated and updated by utilizing API functions of CAD software Unigraphics. The mesh distortion problem near the wall is overcome by automatic remeshing, and the temperatures of the new mesh are conveniently interpolated by using a unique function of ANSYS. The developed model is applied to the pressing process of TV glasses. In conclusion, the presented method shows that the pressing process accompanying moving boundary can be simulated by effectively combining general purpose softwares without resorting to special dedicated codes.