4극 이방성 Sr페라이트·플라스틱자석의 제조에 관한 연구

최희태,문현욱,신용진,진성빈 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

This thesis deals with the fabrication of 4 poles anisotropic Sr ferrite plastic magnets. After Polyamide6 and polyamide12 are kneaded respectively with Sr ferrite powder, silane coupling and calcium stearate of lwt% are added for coating and pelleting. The pelleted specimen injection-moulded under magnetic field using 4 poles mould. In the case of using polyamide6 as a binder, for 4 poles anisotropic Sr ferrite plastic magnets the surface magnetic flux density distribution is +943.8∼-943.8kG and the deviation is 5.2%, polyamide12, the distribution is +1040.9∼-1040.9KG and the deviation is 5.4%.The magnet distribution shows stability. As the results of experiments, we find 4 poles anistropic Sr ferrite plastic magnets have properties as the materials appropriate for manufacturing magnet type synchronous motors.

하이데거의 자연론

崔相旭 강남대학교 1998 (강남대학교)논문집 Vol.32 No.1

식도를 포함한 전위장관을 침범한 전이성 악성 흑색종 1예

최정영,김준기,신성하,고영춘,조상욱,서강석,강명원,임연근,여향순,김경수 全南大醫大 2001 전남의대학술지 Vol.37 No.1

Toluene(1)-water(2)-2-propanol(3)-ethyl acetate(4) 4성분계의 액-액평형

최성욱,정상훈,김영일,이진우,박동원 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.1

We studied on the phase equilibria of quatemary liquid-liquid extraction system composed 2-propanol-water-binary solvent at 25℃. Ethyl acetate(EAc)-toluene was used as binary solvents. Binodal curve, tie-line, distribution and selectivity for quatemary system have been determined in order to investigate the effect of using binary solvent in extracting 2-propanol from aqueous solotion. And this experimental tie-line data was also compared with the values predicted by UNIFAC model. It was shown that UNIFAC model is capable of predicting the tie-line in this quaternary system within an average RMSD of 1.93 mol%.

교육비'의 난맥상

최성욱 木浦大學校 敎育硏究所 2002 교육연구 Vol.15 No.-

교육비의 문제를 둘러싸고 논란이 뜨겁다. 이상한 점은 논쟁이 더할수록 문제가 풀리기보다는 오히려 혼란이 가중되는 느낌이 든다는 것이다. 그 이유는 '교육비'라는 용어에 관한 의미상의 혼란에서 비롯된다는 것이 이글의 입장이다. 통상적으로 사용되는 '교육비'라는 개념은 학교라고 하는 제도를 교육과 연관짓는 우리의 상식적이고 습관적인 사고에 바탕을 두고 있다. 그런데 생활세계의 하나인 학교는 교육만 이루어지는 배타적인 공간이 아니기 때문에 학교생활에 드는 모든 경비가 곧 교육비라고 하는 것은 지나친 속단이다. 우리가 '교육비'라고 부르는 비용에는 교육과 무관한 항목들이 대부분을 차지하고 있으며, 이 때문에 천문학적 액수의 교육비 지출에도 불구하고 교육의 질적 향상은 요원한 실정이다. 이 글에서는 '교육비'의 구성내역을 분석하여 그 허구성을 실제적으로 입증하고 있다. 다른 한편으로, 이 글은 교육의 문제를 경제적 지원에 의해 해결하는 데에는 근본적인 한계가 있다고 보고, 교육비의 투자와 같은 외적 지원은 반드시 교육의 자율성을 우선한다는 전제하에 이루어져야 함을 역설한다. In our society, it has been largely disputed that how much money should be provided for education and to what extent the money for private education can be diminished. But, we should note that most of those debates do not properly count for what the education is in their contexts. Instead, they assume that whatever takes place in school be education, taking for granted that school functions for the purpose of education. However, school does not serve to education only, rather to politics, economics, and society as well. Therefore, all the money that is used for school can not regarded as 'educational.'

하악과두에 발생한 호산구육아종

최문경,허경회,이원진,오성욱,이삼선 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.1

The present study reports a case of eosinophilic granuloma of the mandibular condyle. Eosinophilic granulomas on the mandibular condyle are very rare, but there are several common clinical and radiographic presentations. The clinical presentations involve swelling on preauricular area, limitation of opening, TMJ pain, etc. The radiographic presentations involve radiolucent lytic condylar lesion with or without pathologic fracture. Sometimes new bone formations are observed. The purpose of the article is to add new cases to the literatures.

관상동맥조영술중 비이온성 조영제 Iodixanol (Visipaque®)에 의해 발생한 아나필락시양 반응 1예

최원욱,조정수,김성철,김상훈,안영수,최재웅 대한내과학회 2004 대한내과학회지 Vol.66 No.1

흉통을 주소로 내원한 45세 남자에서 관상동맥조영술 중 비이온성 조영제에 의하여 아나필락시양 반응이 발생한 증례를 경험하였기에 보고하는 바이다. Radiocontrast agent infusion is the most common cause of non-IgE mediated anaphylactoid reaction in the modern medical procedures. The newer lower-osmolar nonionic contrast agents cause significantly lower adverse reactions than the high-osmolar ones. However, anaphylactoid reaction to nonionic contrast agent can cause life-threatening events and even death has been rarely reported. Iodixanol (Visipaque®) is a nonionic, dimeric contrast agent, which is currently used in cardiac catheterization. Here we report a case of anaphylactoid reaction to Iodixanol, a nonionic radiocontrast agent, during cardiac catheterization. A 45-year-old male patient underwent cardiac catheterization for evaluation of substernal pain during exercise. Five minutes after this contrast injection to the left coronary artery, he complained itching and dizziness. Subsequently, generalized urticaria, cyanosis and hypotension were developed. His coronary angiogram showed normal findings. He was treated with intravenous fluids, intravenous diphenhydramine, sucutaneous epinephrine and sympathomimetics and one hour later he recovered. This case suggests that anaphylactoid reaction to a radiocontrast media, iodixanol, should be considered in the list of differential diagnoses for cardiopulmonary arrest during cardiac catheterization.

Langmuir-Blodgett 초박막의 전기적 특성

최병호,김성진,정순욱 金烏工科大學校 1998 論文集 Vol.19 No.-

Ultrathin film of 100Å-order is fabricated by Langmuir-Blodgett technique. By measure of UV-vis spectra and capacitance, deposition status was confirmed together with the thickness of natural oxidized aluminum film inside a device and dielectric constant of (N-docosyl pyridinium)-TCNQ(1:2) complex. The conductivity of this film measured by the direction of either vertical or horizontal axis is results in a quite different value.

횡문근융해증과 급성 신부전 및 범발성 혈관내 응고장애를 동반한 열사병 1예

최대은,박수진,권오경,이한규,이영모,이상주,나기량,이강욱,신영태 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2

Heat stroke is a life-threatening illness characterized by an elevated core body temperature that rises above 40% and central nervous system dysfunctions that results in delirium, convulsions, or coma. Heat stroke is subdivided into two forms, classic and exertional. Since strenuous exercise is one of the major exacerbating and precipitating factors, the incidence of exertional heat stroke is high among young adult, especially military personnel undergoing military training. Exertional heat stroke commonly causes rhabdomyolysis, lactic acidosis, acute renal failure, shock and pulmonary edema. We report a case of heat stroke with rhabdomyolysis, acute renal failure, disseminated intravascular coagulopathy(DIC) after strenuous exercise. A 18 year old man was admitted to the hospital because of loss of consciousness. He was a wrestler and he had tried to lose 6kg in weight by jogging and strenuous exercise on that summer day with hot temperature. The development of this illness was favoured by much clothes inappropriate for that environmental condition with a purpose to enhance sweating, and by restricted intake of water and food. On admission, the blood pressure was 80/50mmHg, and body temperature was 39.4℃ with stuporous mentality. Laboratory finding were as follows : in complete blood cell count, hemoglobin was 16.7g/dL and platelet count was 158,000/ mm³. In blood chemistry, AST 1061U/L, ALT 201U/L, BUN 30mg/dL, Cr 2.2mg/dL, LDH 941IU/L, CK 696IU/L were resulted. In arterial blood gas analysis, pH 7.39, pCO₂ 30mmHg pO₂ 86mmHg, HCO₃ 18.4mEq/L, O₂ saturation 96.7% were resulted. In urinalysis, specific gravity 1.025, protein 3+, erythrocyte 2+ were resulted. In brain imaging study, brain CT finding was normal. After appropriate treatments with rapid cooling, hydration and supportive care, he improved with alert mental status. On 2nd hospital day, in laboratory result, thrombocytopenia and coagulopathy were appeared and renal insufficiency was aggravated. So he was treated with platelet concentrate and fresh frosen plasma for DIC, and enough hydration for appropriate urine volume preservation. After all, On 22nd hospital day, he fully recovered and discharged. Nowadays, with followed for some duration, he is wellbeing with no complications.

병원간 응급의료 전달체계에 대한 연구 : 영동세브란스 병원 응급진료센타를 중심으로

최성욱,김인병,이한식 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

Transporting an emergent patient to a hospital has a crucial role in proper patient care. Objective of this study is to review the current methods and various patient transport system used between the hospital. We have conducted a retrospective analysis of consecutive 753 patients who was transport-in and out from emergency department of YoungDong Severance Hospital from Sep. 1, 1994 to Feb. 28, 1995. All transferred patients were divided into two large category of trauma versus non-trauma, 363 to 390 patients, respectively. Average ISS(injury serverity score) for trauma patients were 7.31 point and average GCS score of 14.29 point for non-trauma patients. Most of the patients were trasfered-in during day and evening hours(84%), but there was no peak hours for transfer-out patients. Little more than half of all transferred patients used ambulance as a mode of transportation. Among all transfer-in patients, 65% were admitted for general care, emergency operation and ICU care. Others, 17%, 18% were discharged or transfer-out to other hospital, respectively. For transfer-out patients, 72% of transfer-out patients were for admission following recommandation by an emergency physician. Each level of hospital was divided into 4 subgroup ; private clinic, small hospital, general hospital and university hospital. ISS was also divided into score less than 10 points for mild and more than 11 points for moderate to severe injury. As a results, all of patients transferred from private clinic bad less than 4 point of ISS. Where as increasing percentage of patients with higher ISS was transferred-in from higher level of hospitals. Transfer-out hospitals were carefully selected by emergency physicians according to patient health status, speciality of referring hospital and closeness to patient residence For non-traumatic patient, GCS score was divided into GCS score 14or less and 15 point. Similar to trauma patient, there was increasing percentage of patient with lower GCS score transfer-in as hospital level increase. Patients with ISS less than 10 point and GCS score 15 point can be transferredto anappropriate level of hos-pital if EMSS operates properly. We suggest with a well organized EMSS, mandatory inter-hospital communication and good transfer record, proper patient transfer and treatment can be achieved.