척추경 나사못 시스템의 극한 단면 하중

송권욱,차승환,정일섭 嶺南大學校 工業技術硏究所 2002 工業技術硏究所論文集 Vol.30 No.2

Simplified modeling technique was applied to generate finite element models for lumbar spine and instrumented pedicle screw systems. Three consecutive vertebrae were included in a model, and two level instrumentaion was analyzed. In these simplified models, spring elements and multi-point constraints were used to represent the stiffness of functional spine units. Instrumented screws were modeled by using beam elements constrained to adjacent cancellous bone nodes. External loads on lumbar were estimated from intact models, based on the experimentally noted normal range of motion for flexion, extension, lateral bending and torsion. Compression load was determined by overload assumption based on the weight of human body. These estimated loads were regarded as external loads and applied to instrumented models, and section loads in implanted pedicle screw system were computed. The conditions, magnitudes and locations of critical section loads were sought for and summarized. From the computed internal loads, critical load cases were identified. The effective stresses for the critical cases were evaluated and found to be well below the static strength of titanium alloy.

두개강내로 전이된 Adenoid Cystic Carcinoma 2례 : 증례보고 Report of Two Cases

송재욱,윤상민,이창훈,장지수,이승훈,조경자,강신광 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.10

The authors describe two cases of unusual intracranial metastatic adenoid cystic carcinomas. A 42-year-old woman had a right pariental epidural metastatic mass. presumed hematogenous. spread from a primary tumor in the parotid gland. In second case, a 32-year-old man had a intracranial metastatic adenoid cystic carcinoma mimicking calcified psammomatous meningioma on CT scans. We present these unusual cases with a review of relevant literature and a discussion of possible pathogenesis.

복합용도개발개념의 관점으로 본 개발제한구역 해제지역 집단취락지구의 개발발향에 관한 연구

송진욱,권영,이승조,김용성 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

This study intends to propose a concept of mixed-use development strategy for clustered settlements within the Greenbelt in order to prevent not only broken-up a community in the area, but also evasive private development without elaborate planning. From the point of view, the study attempted to extract and re-establish the planning and development direction of MXD in the Greenbelt by reviewing the theoretical assumption of MXD. To apply new direction of MXD, target site has been adopted as appropriate representative sample. The results of this study are follows; the need not only of control and managerial strategy for specifying characteristic of the target site within the Greenbelt, but also of alternative MXD strategy based on neighborhood for maintaining existing community.

관동맥연축의 비침습적 진단에 있어 Ergonovine Echocardiogrpahy의 유용성

송재관,박성욱,김재중,두영철,김원호,박승정,이종구 울산대학교 의과대학 1992 울산의대학술지 Vol.1 No.1

관동맥연축의 비침습적인 진단방법의 확립은 침습적인 관동맥조영술 및 연축유발검사에 비해 반복적용이 가능한 이론적인 장점이 있어 선별검사(screening test)로서의 기능뿐만 아니라 치료로 이용되는 약물의 효과비교 및 추적검사를 통한 관동맥연축의 임상ㄹ활동도 평가등에 손쉽게 이용될 수 있으라라 예상된다. 이에 저자들은 ergonovine 투여시 기록된 좌심실벽운동장애 유무가 갖는 관동맥연축에 의한 심근허혈의 진단적 가치를 평가하기 위해 Beside Ergonovine Echocardiography Test를 시행하였다. 관동맥조영술 및 연축유발검사에서 변이형협심증으로 증명된 30명(남자 27명, 평균연령 54세)과 비특이적인 흉통질환군 20명(여자 12명, 평균연령 55세)을 대상으로 관동맥조영술 다음날 ergonovine test를 시행하였다. 운동부하검사가 음성인 환자들을 대상으로 6시간 공복시킨 뒤 앙와위에서 상지정맥을 통하여 25-50microgram(이하 mcg)을 5뷴 간격으로 투여하여 흉통의 유무, 심전도 및 이면성심초음파를 5분마다 기록하였으며 총투여량이 350mcg에 도달하거나 양성반응을 보이는 경우 nitroglycerin 250mcg 정주 및 설하투여로 종료하였다. 좌심실벽운동의 분석은 side-by-side continuous cine-loop display가 가능한 QUAD screen 방법으로 판별하였다. 가역적인 심전도 변화나 국소적인 심실벽운동장애가 유발되는 경우를 양성으로 판정하였다. Ergonovine Echocardiography의 전체 민감도는 90%, 특이도는 100%로 동시에 기록된 심전도 변화의 민감도(73%)보다 높았으며 특히 흉통이 있으나 심전도 변화가 전혀 없었던 5례 모두에서 좌심실벽운동장애가 관찰되어 본 검사법의 우월성을 확인할 수 있었다. 양성반응을 보인 ergonovine 평균 투여량이 173±95mcg 이었으며 흉통발작의 빈도를 기준으로한 임상활동도가 높은 경우 활동도가 낮은 군에 비해 양성반응을 의한 총 ergonovine 투여량이 적었으며(123±86 vs 213±83mcg, p<0.01) 관동맥협착이 연축에 동반되어 있는 경우 정상 관동맥에 연축이 있는 경우보다 민감도가 더 높았다(100% va 60%, P=0.02). Ergonovine 투여로 혈압은 기저치 보다 약 17%정도 증가되었으나 맥박수는 큰 변화를 나타내지 않아 안전하게 시행될수 있었으며 오심, 두통, 견갑부통증, 심실기외수축, 방실차단 등이 소수례에서 관찰되었으나 검사로 인한 사망례는 없었다. Ergonovine 주입후 기록된 좌심실벽운동동장애는 심전도 변화보다 더 민감하게 관동맥연축에 의한 심근허혈을 진단할 수 있었으며 Ergonovine Echocardiography는 운동부하검사 등으로 심한 관동맥협착이 배제된 선별된 흉통환자들에서 관동맥연축의 진단에 안전하게 시행될 수 있는 민감하고 특이도가 높은 검사방법이며 변이형협심증의 임상활동도와 관동맥협착의 동반유무가 본 검사법의 결과에 영향을 미칠 수 있으리라 사료된다. The purpose of this study was to evaluate the clinical feasibility of bedside intravenous ergonovine test with echocardiography as a noninvasive diagnostic method for coronary vasospasm. Bedside ergonovine test was performed in 50 patients with chest pain one day after coronary angiography with spasm provocation test;30 patients showed positive results of provocation test while in 20 patients there was no evidence of coronary vasospasm. A bolus of ergonovine maleate(.025 or .05mg) was injected at 5 min intervals up to total cumulative dosage of 0.35mg, and 12-leads ECG and 2-D Echo were recorded every 3min after each injection. Left ventricular wall motion was analyzed with a commercially available ' QUAD' system. The positive criteria of beside ergonovine test included reversible ST segment elevation or depression, T wave changes in ECG(ECG criteria) and reversible regional wall motion abnormalities(RWMA) in Echo(Echo criteria). The overall sensitivity and specificity of ECG criteria were 73%(22/30) and 100% respectively ; The sensitivity of Echo criteria increased up to 90%(27/30) without the change of the specificity. Among 22 patients with reversible ECG changes only 73%(16/22) showed typical ST segment elevation while ST depression was recorded in 2 patients(9%) and minor T wave peaking or flattening without ST segment displacement in 4 patients(18%). Concomitant fixed coronary lesion does increase the sensitivity of the test compared to pure coronary vasospasm with ECG criteria(100% vs 60%, p<0.05). Mean does of ergonovine with positive results was 173±95 microgram(mcg) and the amount of does of ergonovine for positive result was significantly larger in patients with low disease activity (chest pain <5times/자) than those with high disease activity(213±83 vs 123±86mcg, p<0.01). There was no procedure related mortality or fatal arrhythmias. Ergonovine echocardiography is a highly sensitive and specific test for coronary vasospasm and is safe in selected patients in whom the exercise test is negative and severe fixed coronary artery disease has been excluded. Presence of concomitant fixed coronary artery disease and the degree of clinical activity of coronary vasospasm may influence the results of this test.

관동맥연축의 진단을 위한 Ergonovine Echocardiography의 안전성 및 임상적 유용성

송재관,박성욱,강덕현,조구영,나득영,이내희,이철환,홍명기,김재중,박승정 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

베체트병에서 만성 기침으로 발현한 폐동맥류 1예

정승현,송주경,정성수,강성욱 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

저자들은 만성 기침이 있었으나 정확한 원인을 찾지 못한 채 보존적 치료만 받던 베체트병이 있는 37세 여자환자를 경험하였고 흉부 방사선사진과 흉부 전산화 단층 촬영으로 폐동맥류로 진단하고 고용량의 스테로이드로 치료하였고 이 과정에서 대량 객혈이 있었으나 보존적 치료로 호전된 베체트병 1 예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Pulmonary Artery Aneurysm Manifesting as Chronic cough in Behcet's disease Behcet's disease is a relapsing chronic inflammation disorder of unknown etiology. Although Behcet's disease has originally been described as a triad of recurrent oral aphthous ulceration, genital ulceration and uveitis, it is now recognized as a multisystem disease with vasculitis as the main pathological finding. Clinical manifestations additional to this triad include involvement of the skin, joints, large vessels, lung, gastrointestinal and genitourinary tracts, brain. We report a case of pulmonary artery aneurysm manifesting as chronic cough in Behcet's disease. She was a 47 year-old woman with Bechet's disease treated with prednisolone and colchicine. She had suffered from chronic cough for several years, but been treated only with antitussive agents. Chest CT revealed multifocal patchy consolidation in lung parenchym and aneurysmal dialatation of pulmonary artery. We diagnosed pulmonary aneurysm with CT finding as the cause of chronic cough.

UML을 이용한 송전선로 보호계전기 정정프로그램 분석/설계

吳泰旭,崔勉松,李承宰 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

PROSET2000 that is integrated protective management system had developed and used in order to automate the setting process of protective relays in transmission system protection. PROSET2000 have database for relay setting and automated for relay setting program within. This paper proposed PCM current differential relay setting program point of Object Oriented Programming paradigm using Unified Modeling Language about additional relay in PROSET2000. Nevertheless each relay uses same current differential but setting method is different. This paper discribed different thing about setting method of each relay and evaluated more effective and corrective relay setting program using UML.

진균성 부비동염의 임상적 고찰

이승원,김장욱,박영진,송태현,이병돈,장혁순 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

The fungal sinusitis is relatively rare and mainly develops in immunocompromised hosts, but is sporadically appears in the immunocompetent patients, where its incidence tends to be increasing. Because the clinical features of this disease are similar to those of chronic suppurative sinusitis, this entity may be overlooked. We analysed thirteen fungal sinusitis from January 1997 through December 1999 based on clinical features, laboratory characteristics and operative findings. The results are as follows. 1)Fungal sinusitis occurred 3.3 times as frequently in female patients as in male patients and the peak age groups are 4th and 5th decades. 2) The time intervals between the onset of symptoms and the first hospital visit were as follows: 5 cases within 3 months, 1 case between 4 and 6 months, 3 cases between 7 and 12 months, and 4 cases over 1 year. 3) The chief complaints were nasal obstruction, postnasal drip, rhinorrhea, cheek pain, headache, ocular pain, sneezing. 4) The characteristic computerized tomographic findings were hyperattenuated lesions in the maxillary sinus and in the nasal cavity near the natural ostium. 5) The most common pathogen was Aspergillus(92.3%) 6) We performed Caldwell-Luc's operation only in 4 cases, Caldwell-Luc's operation with intranasal ethmoidectomy in 3 cases, Caldwell-Luc's operation with endoscopic sinus surgery in 3 cases and endoscopic sinus sugery only in 3 cases. 7) Most of the gross specimens revealed a fungus ball containing a black-brown necrotic debris or caseous material.

함평만 갯벌 조간대의 식생분포 및 현존량

이승호,이점숙,김종욱,김하송,임병선 木浦大學校 沿岸環境硏究所 1998 沿岸環境硏究 Vol.15 No.1

함평만 조간대 염생식물조사를 위하여 염생식물군락이 형성된 6개지역을 선정하여 식생분포 및 현존량을 조사하였다. 우점군락은 퉁퉁마디군락(Salicoenia herbacea community), 칠면초군락(Suaeda japonic community), 나문재군락(Suaeda asparagoides community), 좀보리사초군락(Carex pumilalini community), 가는갯능쟁이군락(Atriplex gmelini community), 갯개미취군락(Aster tripolium community), 갯잔디군락(Zoysia sinica community), 해홍나물군락(Suaeda maritima community), 갯질경군락(Limonium tetragonun community), 갈대군락(Phragmites communis community), 실망초군락(Erigeron bonariensis community)으로 구분되었다. 염생식물 군락의 생산량은 1,680∼2,170 g.d.w./㎡으로 갈대군락이 가장 높았고, 갯잔디 군락이 310∼500 g.d.w./㎡으로 가장 낮았다. The coastal vegetation was classified by the Braun-Blanquet's method and the biomass was investigated at the wetland of Hampyung-Man. The vegetation of the study area was classified with 11 coastal communities as follows: Salicornia herbacea community, Suaeda japonica community, Suaeda asparagoides community, Carex pumilalini community, Atriplex gmelini community, Aster tripolium community, Zoysia sinica community, Suaeda maritima community, Limonium tetragonun community, Phragmites communis community, Erigeron bonariensis community, Biomass was highest in Phragmites communis community (1,680∼2,170 g.d.w./㎡) and lowest in Zoysia sinica community (310∼500 g.d.w./㎡).

Catenary 곡면을 갖는 막구조물의 치환기법에 관한 연구

임채욱,송평훈,김승덕,송호산 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Membrane structure systems and cable net structure systems are attracting people's attention as they are used in many buildings because of their light materials and airy appearances. If a membrane structure system or a cable net structure system does not have sufficiently high initial stiffness, it may be in unstable state. But if the initial stiffness is secured, the system will be in stable state. In this study the nonlinear finite element formulae for membrane and cable members considering geometric nonlinearity is derived, and then a catenary's membrane structure, and a tension membrane structure by Nass(Nonlinear Analysis for Spatial Structures) program is analyzed. The suitable scheme, which membrane structure are assigned by cable elements for overcoming the unfitted shape problem, is shown that the section of cable is assigned by element's area.