지도자의 좌우명(座右銘)

안병욱 국제기독교언어문화연구원 2002 기독교언어문화논집 Vol.6 No.-

Dr. Byung Wook Ahn. 2003. Leader's Favourite Maxim. Collected Papers on Christian Language Culture. In this paper, the writer argues that there are three kinds of important choices in our life. They are a vocational choice, a mate's choice, and the choice of our view of life. The choices influence our success or failure, and our happiness or unhappiness. Our favourite maxim can be said to be the guiding principle in our life, a code of conduct, and the mirror of daily life. They are for our character building as a favourite maxim, which is not only a short expression of a general truth but also a briefly-expressed rule to guide people. The favourite maxim asks us leaders to answer the questions as follows : "Who is the wisest man in the world?", "Who is the strongest man in the world?", and Who is the richest man in the world?" As leaders, we must learn, for living is learning. First of all, we must learn to adapt ourselves to our circumstances in the age of lifelong education. And the wisest man is the man of learning. As leaders, we must fight to overcome ourselves. For living is fighting. We must fight as long as we live. We must fight a good fight. We must devote our lifetime to fighting the good fight. And the strongest man in the world is the man who overcomes himself. As leaders, we must be self-sufficient. We must know our station in life, keep to our sphere in life, and live within our means. And the richest man in the world is a self-sufficient man. In conclusion, as leaders, we must feel a call to the occupation or the profession. For our vocation or calling can be named our Backbone. And it can be called the achievement of social role playing. In order to strive for national wealth and power, as leaders, we must dedicate ourselves to our own affair with a divine calling, not a mere means for making a living.

음향방출을 이용한 TiAl의 미시파괴기구 및 파괴인성향상에 관한 연구(Ⅰ)

안병욱 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.1

본 연구에서 얻어진 결과는 다음과 같다. 본 연구에서는 차세대의 경량내열재료로서 기대되고 있는 TiAl의 물성특성을 해명하였다. 인장특성 실체현미경, SEM에 의한 파면관찰 등의 방법을 취하였다. (1) Ti-Al 2원게에서 34wt%Al을 함유하는 시료의 강도가 높은 것은 균열의 진전이 lamellar조직에 대응하여 지그재그상으로 입내파괴를 이루고 있으며, 취약한 TiAl단상이 존재하지 않는 것은 입경의 감소이상의 효과가 있다는 것을 확인하였다. Al함유량의 증가와 함께 증가한 연신율은 조직관찰의 결과를 보면 입경의 감소에 기인함을 알았다. (2) Ti-Al-Mn 3원계에서는 강도, 연신율은 무첨가재보다 상승하고 2wt% Mn첨가재가 좋은 성질을 나타냈다. 이것은 Mn의 고용상태가 최적이라는 것에 기인한다고 생각된다. 또한 Mn 첨가의 효과는 입경의 감소라는 것을 알았다. 본 연구의 대상으로한 TiAl금속화합물 조성중에서는 34wt% Al, 2wt% Mn 첨가재가 강도상 균형을 이루는 최적조성이라는 것을 알 수 있었다.

부분 치수절단술을 이용한 복잡 치관파절의 치료 : 증례보고

안병덕,김영재,장기택,이상훈,김종철,한세현,김정욱 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.2

혼합 치열기 및 초기 영구치열기의 소아,청소년에서 외상에 의한 치관 파절은 빈번하게 발생한다. 치관파절은 치수의 노출 유무에 따라 단순 치관파절,복잡 치관파절로 분류된다. 치수가 노출된 복잡 치관파절의 경우 치수에 대한 고려 및 처치가 필수적인데,초기 영구치열기에는 전치부 치근의 발육이 완전히 이루어지지 않았기 때문에 완성된 치근을 가지는 치아보다 치료가 복잡하다. 치료의 목적은 적절한 치수 치료를 통해 치근의 완성을 도모하는 것으로 이를 위해 직접 치수복조술,부분 치수절단술,치경부 치수절단술의 방법을 이용한다. 이 중 부분 치수절단술은 성공률도 높으며 치경부 치수를 보존하기 때문에 여러 장점을 지니는 치료방법이다. 복잡 치관파절을 주소로 내원한 환자에서 부분 치수절단술을 시행하여 양호한 결과를 나타내어 이를 보고하는 바이다. Traumatic crown fracture in mixed dentition or early permanent dentition is relatively common. Crown fracture is classified into simple or complicated crown fracture by the presence of pulp exposure. The condition of pulp must be considered in treatment of crown fractures with pulp exposure. Treatment of immature crown-fractured incisor with pulp exposure is more complex because of its incomplete root formation. Pulp capping, partial pulpotomy, cervical pulpotomy can be used for continuous root development in immature crown-fractured incisor with pulp exposure. The success rate of partial pulpotomy is very high and there are several advantages of partial pulpotomy because the cell-rich coronal pulp tissue is preserved. This paper reports 2 cases of crown-fractured permanent incisors with pulp exposure that had been treated by partial pulpotomy successfully.

SCM 440材의 疲勞龜裂進展擧動 評價에 關한 實驗的 硏究

安秉旭 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.2

Using the CT specimen of SCM 440, we estimated the fatigue crack propagation behavior in stable crack propagation range. Furthermore the fatigue crack propagation rate, Acoustic Emission(AE) count rate, and fractography charactristics were also compared among others. The following results were confirmed by experimental obser- vation. Near-threshold stress intensity factor range(△K_th) is influenced by stress ratio, but not at the upper limit of stable crack propagation range. As stress intensity factor range (△K) and(or) stress amplitude increase(s), both crack propagation rate(da / dN) and AE count rate(dn/ dN ) increase. Effective stress intensity factor range(△Keff) determined from the crack closure point measurement by AE method is useful for the evaluation of fatigue crack propagation rate. Fractography in stable crack propagation range showed striation, and agreed with the crack propagation rate obtained either by experiment or by the results of microscopic measurements. ◁표삽입▷ (원문을 참조하세요)

호흡곤란과 주시 유발 눈떨림을 동반한 비전형적 밀러-피셔 증후군 1례

안성민,김호창,정보영,서억수,정병욱 동국대학교 의학연구소 2009 東國醫學 Vol.15 No.2

We report a case of atypical Miller-Fisher syndrome with respiratory distress and gaze evoked nystagmus. A 70 year-old man who has a hepatocellular carcinoma with metastasis to the lung was referred complaining of acute onset diplopia. He showed a 15 prism diopter esotropia, gaze evoked nystagmus at lateral gaze, and limitation of the extraocular movement at any directional gaze. And deep tendon reflexes were absent. The results of brain MRI and cerebrospinal fluid analysis were normal, so we can differentiate an atypical Miller-Fisher syndrome with the Guillain-Barre syndrome and other CNS problems. After 2 weeks, diplopia, nystagmus, and extraocular movement were improved spontaneously, but deep tendon reflexes were still absent. The differential diagnosis of the Miller-Fisher syndrome is important because it can be recovered spontaneously. We can diagnose a case of atypical Miller-Fisher syndrome which represented normal findings of brain MRI, CSF analysis. 호흡곤란과 주시유발 눈떨림을 동반한 비전형적인 밀러-피셔 증후군 (atypical Miller-Fisher syndrome) 1례를 보고한다. 70세 남자환자가 간세포암과 폐전이로 내과 입원중에 갑자기 생긴 복시를 주소로 의뢰되었다. 제 1안위에서 15 PD의 내사시가 있었고, 측면주시시 주시 유발 눈떨림이 있었다. 모든 주시방향에서 눈운동 장애가 있었으며 사지의 심부건반사가 없었다. 두부 MRI및 뇌척수액검사에서 이상이 확인되지 않아, 중추신경계의 이상 및 길랑-바레 증후군(Guillain-Barre syndrome)과 감별하여 비전형적 밀러-피셔 증후군으로 진단하였다. 2주 후 경과관찰에서 복시와 주시유발 눈떨림, 안구운동제한에 호전이 있었으며 , 심부건반사의 소실은 회복되지 않았다. 밀러-피셔 증후군은 대개가 치료없이 회복되어서 다른 질환과의 감별이 중요하다. 저자들은 두부 MRI및 뇌척수액검사에서 정상 소견을 확인하고 비전형적 밀러-피셔 증후군을 감별 진단할 수 있었기에 이를 보고한다.

機械 構造用鋼(SM45C)의 彈塑性破壞試驗時 AE에 의한 破壞特性 硏究

安秉旭,曺萬鎬 大田産業大學校 1994 한밭대학교 논문집 Vol.11 No.0201

The estimation of elasto-plastic fracture toughness [J_IC] is nessary for design and manufacturing of machine and structure. In this study, R-curve method are used to detect the onset of crack extension of SM45C. In addition to the these moth(14 an Acoustic Emission(AE) method is used for the present investigation. As the result of the test. the following results were obtained. Acoustic Emission method is economic and reliable method for identifying the fracture mechinism using sincle specimen J_IC estimation. AE mathod can find accurately the signal of the crack initation point. The J_IC value method by Acoustic Emission method was less that using ASTM method.

大學實驗實習施設의 效率的인 活用方案에 關한 硏究

安秉旭,辛承鐘 大田産業大學校 1993 한밭대학교 논문집 Vol.10 No.1

In our country, the universities are not sufficient for laboratory facilities as well as research systems. Therefore, It is necessary to introduce the systematic co-operative methods and to operate the systems rationally. After all, if co-operative laboratory facilities are equipped in universities, the effects will be expected as follows : 1) The efficiency on saving the budget effectively by the prevention of the overlapping investments. 2) The greatest efficiency of the use according to co-operative practical uses. 3) The rational management and the technological accumulation by professional agents. 4) The efficiency on laboratory educational-industrial co-operation. 5) The international exchange with the information of technology.

Dummy-Bar Head 鋼材의 材質向上

安秉旭,李相鎬,李柄榮,金志洙 한밭대학교 산업과학기술연구소 1994 논문집 Vol.2 No.-

Dummy-Bar Head is used for continuous casting equipment. It is heated up at high temperature and cooled down repeatedly in using. Then the thermal extension by thermal stress and high temperature oxidation occur to it. This easily results in heating damage because Head, contact with melting metal, appears in micro-crack and tension force. In other words, it is material that gives the greatest influence in endurance life. The method of study is to compare and evaluate present material and improved material by the new alloy design. In conclusion, the results are as follows : 1) I think that the following range is suitable to chemical component. ◁표 삽입▷(원문을 참조하세요) 2) Micro-crack occurs in repeated heating and cooling owing to decarburization and thermal extension. Adding carbide stability elements-Cr, Mn, and V-shows martensite and less micro-crack. 3) Dummy-Bar Head is a large cast steel, An effective heat treatment condition is to heat step by step and to cool by force at 880℃. After that, It is effective to cool at 600∼680℃. 4) Improved product maintains the even hardness value. And impact value is over three times higher than present product for repeated heating and cooling. 5) The transition range over the fracture toughness value has smaller in improved product than present product for repeated heating and cooling. Through the fracture toughness evaluation, the characteristics of change is evaluated in materials. And we can make the predictable criteria of life with Refrica method. According to the analysis and investigation of the real condition is use, the improved product is accomplished in optimal alloying design and product processing, and satifies the required condition. I think that it is widely used as proper materials to a higher temperature concerning the economy.

당뇨병 환자에서 혈장 Thrombin-Antithrombin Ⅲ 및 Plasmin-α_2-Plasmin Inhibitor 복합체의 임상적 의의

김경욱,김은숙,정상수,윤수지,박우일,이준희,남수연,안철우,문병수,김경래,차봉수,송영득,임승길,이현철,허갑범 대한당뇨병학회 2002 Diabetes and Metabolism Journal Vol.25 No.5

연구배경:당뇨병 환자에서 혈액응고 및 섬유소용해 체계의 이상경향이 있어 그 결과로 여러 혈관합병증의 발생위험이 높다는 사실은 널리 알려져 있다. 그 기전은 아직 확실히 밝혀지지 않았으나, 고혈당으로 인한 혈장 단백질들의 비효소성 당화작용이나 산화성 스트레스로 인한 유리 라티칼 작용으로 응고항진이나 섬유소용해 활성의 저하를 유발하는 것으로 생각되고 있다. 최근 응고 및 용해인자와 그 억제자의 복합체들의 증가가 이 상태를 비교적 예민하게 반영한다고 알려져 있다. 방법:본 연구에서는 당뇨병 환자 101명과 정상 대조군 20명에서 혈장내 thrombin­antithrombin complex(TAT)와 plasmin­α₂­plasmin inhibitor complex(PIC)를 측정하여 비교하고, 당뇨병 환자에서 미세혈관 합병증과 대혈관합병증의 유무에 따른 차이와, 이미 혈관 질환의 위험인자로 알려져 있는 인자들간의 상관성을 알아보고자 하였다. 결과:1. 환자의 분포를 살펴보면 혈관합병증이 있는 군은 85명, 혈관합병증이 없는 군은 16명이었고, 평균연령은 각각 57.9±14.1세, 49.9±16.6세로 혈관 합병증이 있는 군에서 더 나이가 많았고, 체질량지수는 23.2±3.4㎏/㎡, 24.1±3.4㎏/㎡로 두 군간 유의한 차이는 없었다. 또 두 군간의 혈압 및 HbA1c, 공복혈당 및 인슐린과 C­peptide, 총 콜레스테롤, 중성지방, HDL­콜레스테롤, Lp⒜는 유의한 차이가 없었고, 미세혈관합병증이 있는 군에서 당뇨병의 유병기간이 길었다. 2. TAT 및 PIC의 농도는 정상 대조군에서는 2.8±1.2 ng/mL, 240.4±69.7 ng/mL이었고, 당뇨병 환자군에서는 9.5±22.6 ng/mL, 472.2±258.7 ng/mL이었다. TAT와 PIC 모두 당뇨병 환자군에서 정상 대조군에 비해 유의하게 증가되어 있었고(p<0.001), TAT/PIC ratio는 두 군간 차이가 없었다. 3. 당뇨병 환자의 혈관합병증에 따른 TAT 및 PIC, fibrinogen 농도는 합병증이 없는 군은 각각 4.1±2.4ng/mL, 362.2±272.0ng/mL, 322.7±102.4mg/mL으로 PIC와 fibrinogen의 증가를 보였으나, 연령을 보정한 후에는 통계학적 유의성은 없었다. 또 대혈관 합병증군에서는 각각 6.0±4.9 ng/mL, 507.4±321.6 ng/mL, 427.1±194.7 mg/dL이었으며 미세·대혈관 합병증군에서는 10.4±6.4 ng/mL, 484.8±269.7 ng/mL, 388.4±132.4 mg/dL으로 TAT의 증가를 보였으나 역시 연령을 보정한 후에는 통계학적 유의성은 없었다. 4. 미세혈관합병증군에서 HbA1c(>8%)가 높은 군의 PIC 농도가 유의하게 높았고(p=0.049), 대혈관합병증군에서 HbA1c(>8%)가 높은 군의 총 콜레스테롤 농도가 유의하게 높았다(p=0.042). 5. 총 당뇨병 환자군에서 PIC는 fibrinogen과 HbA1c와 양의 상관관계를, BMI와 음의 상관관계를 보였으며(r=0.47, 0.31,-0.25), 혈관 합병증이 없는 당뇨병 환자군에서만 TAT는 HbA1c와 양의 상관관계를 보였다(r=0.67). 결론:이상의 결과에서 혈장 TAT 및 PIC 농도는 당뇨병 환자에서 정상 대조군에 비해 의미있게 증가되어 있었고, 당뇨병 환자군에서는 연령의 증가와 유병기간이 혈액응고항진 및 용해의 장애에 큰 역할을 함을 알 수 있었으며, 총 당뇨병 환자군에 PIC와 HbA1c와 양의 상관관계를, BMI와 음의 상관관계를 보였으며 혈관 합병증이 없는 당뇨병 환자군에서만 TAT는 HbA1c와 양의 상관관계를 보였다. 따라서 당뇨병 환자에서 혈액응고 및 용해의 장애가 동반되어 있다고 볼 수 있으며, 혈장 TAT 및 PIC는 혈관합병증으로의 진행을 예측하는 지표로서 유용하리라 생각된다. 또 혈당조절정도와 상관성이 있으므로 혈당조절후에 추적검사를 시행하여 합병증의 예방이 가능한지 추후 연구가 필요하리라 생각된다. Background : Abnormality of coagulation and fibrinolystic system is known as a predisposing factor of vascular complication in diabetes. Although the pathogenesis is not well known, non-enzymatic glycation reaction and the increase in production of free radicals due to an increased oxidative stress may be linked to the hypercoagulibility and hypofibrinolytic activity. As indices of abnormality in coagulation and firinolysis in peripheral blood, plasma thrombin-antithrombin Ⅲ complex (TAT) and plasmin-α_2-plasmin inhibitor complex (PIC) were measured. The purpose of this study was to clarify whether hypercoagulability exists in diabetic patients with or without vascular complication. Methods : In our study, we measured plasma thrombin-antithrombin Ⅲ compelx (TAT) and plasmin-α_2-plasmin inhibit or complex (PIC) in 101 diabetic subjects and 20 controls. Comparing TAT and PIC levels in diabetic microvascular complication group, diabetic macrovascular complication group and controls, we examined correlation between risk factors associated with diabetic vascular complication. Results : 1. The group with diabetic vascular complication was older than group without complication. There was no significant difference in BMI, blood pressure, HbA_ic, blood sugar level, insulin, C-peptide, serum creatinine, total cholesterol, triglyceride, HDL-cholesterol, Lp (a) between two groups. The group with diabetic microvascular complication had longer duration of diabetes. 2. Concentration of TAT and PIC were 2.8±1.2 ng/ mL, 240.4±69.7 ng/ mL in controls and 9.5±22.6 ng/ mL, 472.2±258.7 ng/ mL in diabetic patients, respectively. TAT and PIC were significantly higher in diabetic patients than in control (p<0.001). But TAT/PIC ratio was no significant difference between two groups. 3. In diabetic patients, concentration of TAT and PIC and fibrinogen were respectively 4.1±2.4 ng/ mL, 362.2±272.0 ng/ mL, 322.7±102.4 mg/ dL in group without vascular complication and 5.3±4.1 ng/ mL, 529.5±258.7 ng/ mL, 374.9±106.2 mg/ dL in group with microvascular complication, which group had increase in PIC and Fibrinogen but no significance after correction of age. Concentration of TAT and PIC and Fibrinogen were 60.±4.9 ng/ mL, 507.4±321.6 ng/ mL, 427.1±194.7 mg/ dL in macrovascular complication, and 10.4±6.7 mg/ mL, 484.8±269.7 ng/ mL, 388.4±132.4 mg/ dL in combined vascular complication which group showed increase of TAT but also had no significant increase after correction of age. 4. In diabetic microvascular complication patients, group of high HbA_1c (>8%) (p=0.049) had significant high PIC concentration. In diabetic macrovascular complication patients, group of high HbA_1c (>8%) (p=0.042) had significant high total cholesterol concentration. 5. In all diabetic patients, PIC was positively correlated with fibrinogen and HbA_1c and negatively correlated BMI (r=0.47, 0.31, -0.25). Only in daibetic patients without angiopathy, TAT was positively correlated with HbA_1c (r=0.67). Conclusion : In this study, plasma TAT and PIC concentration significantly increased in diabetic patients compared with controls, and PIC was increased in group with microvascular complication, TAT were increased in group with combined micro macrovascular complication. However, there was no significance relationship existed when correctinf for age. PIC was correlated with HbA_1c. TAT was correlated with HbA_1c only in the group without angiopathy. Abnormality of coagulation and fibrinolysis were combined in diabetes, plasma TAT and PIC can be used as an index of vascular complication. Also we found the correlation with the degree of the blood glucose control. Therefore we need follow up study for the possibility of prevention of vascular complication after controlling the blood glucose to age-matched patients (J Kor Diaabetes Asso 25:354~363, 2001).

2 CASES OF RABBIT SYNDROME : 토끼증후군 2례

민병근,이창화,안준호,천두욱,김헌수 울산대학교 의과대학 1994 울산의대학술지 Vol.3 No.2

The application of neuroleptics to schizophrenic and other psychotic patients in the early 1950's led to the therapeutic revolution into the psychiatry, on the other hand neuroleptic-related adverse effects did frequently occur. The authors experienced 2 cases of rabbit syndrome producing by rare complication of neuroleptic medication. Two cases were examined for the rabbit syndrome by the description of Villeneuve(1972) and Sovner and DiMascio(1977). The reciprocal coordination test and the finger-tapping technique to worsen the symptoms also were applied to two patients. The authors emphasized two issues of rabbit syndrome as follows. First, though the literature search showed that the majority of patients presented with rabbit syndrome which is usually seen after a prolonged exposure to neuroleptic medication with the more potency in the middle or elderly aged are over 45 years old, we suggest that this syndrome might be linked to the younger age factor and the low potency thioridazine in our patient. Second, the rabbit syndrome is in the importance of the clinical practice because of being readily reversible with antiparkinsonian agents or anticholinergic drugs. In addition, recognizing this condition and differentiating it from tardive dyskinesia helps in the choice of the proper treatment of orofacial disorders following neuroleptic medication for the long time.