Wolff-Parkinson-White증후군의 임상상 및 전기생리학적 소견

안신기,이문형,장양수,오동진,최인석,하종원,임세중,김병옥,정남식,심원흠,조승연,김성순 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.9

EMTP MODELS를 이용한 2차 아크 모델링 기법에 관한 연구

안상필,김병천,김철환 成均館大學校 科學技術硏究所 1998 論文集 Vol.49 No.2

The most frequent faults on overhead transmission lines are single-phase to ground arc faults in air. On HV/EHV lines, the single-phase autoreclosure is an effective means to clear the fault while retaining the system stability. For the improvement of an adaptive SPAR(Single-Phase Auto-Reclosure) and novel protection schemes, it is important to simulate arc faults. But, it is difficult to reproduce the real arc behaviour, i.e. the extinction phenomenon exactly by computer simulations due to extremely random behavior of secondary arc. For simplicity of simulation processing, a simulation language, called MODELS, is used. It has been added to the EMTP, which permits to interface control system with power system. This paper proposes a new computer modeling techniques for the primary and the secondary arc separately, which can be implemented with EMTP MODELS routine, and the the performance of the proposed model is simulated on a typical 154 [kV] korean transmission line system.

제조에 對한 文獻的 考察

안태규,최병렬,송기철,이용연,유화승,서상훈,최우진,조정효,이연월,손창규,조종관 대전대학교 한방병원 2001 惠和醫學 Vol.10 No.1

In the literatual study on Holotrichia, the results were obtained as follows ; 1. Holotrichia is larva of Holotrichia diomphalia Bates etc. powder or liquor of Holotrichia is used medically. 2. Appearance of Holotrichia is shape of kidney, yellowish color. 3. The oriental characters of Holotrichia is warm, toxicant, salty. 4. The significant efficancy of Holotrichia is breaking the stagnant blood. 5. Holotrichia can be applied to the diseases related to thrombosis, and recover the demage of liver. 6. Holotrichia avails Liver diseases such as Hepatitis, Liver cirrhosis, Hepatosplenomegaly, Hepatoma etc.

미세 펀칭 구멍의 디버링 특성에 관한 연구

안병운,최용수,박성준,윤종학 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

In micro hole punching process the burr occurs inevitably, but the burr must be minimized in order to improve the quality and accuracy of the product. In this study, magnetic field assisted polishing technique is applied to remove the burr which exists in nozzles for ink jet printer head and proved to be a feasible for deburring by experiment. The deburring characteristics of sheet metals was investigated changing with polishing time. After the deburring, the burr size has remarkably reduced and roundness of the hole also has improved.

고관절 전치환술 후 합병된 비구 컵 해리와 동반된 활액낭종 : 증례보고 Case Report

성일보,정국진,박수철,김진호,정형진,황재광,염재광,정병현,안종국 대한고관절학회 2001 Hip and Pelvis Vol.13 No.1

개구리 정맥동(Sinus Venosus)의 전기적 성질에 관한 연구

안병규,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1983 中央醫大誌 Vol.8 No.1

The frog sinus venosus were studied with conventional glass microelectrode technique in order to elucidate the underlying mechanism of spontaneous pacemaker activity. The analyses were focussed on the ionic nature of pacemaker current by changing the concentrations of extracellular K^+ and/Na^+, or by using blockers of K- and Ca-current and chronotropic transmitters. 1. The action potential sinus venosus has some characteristic feature of maximal diastolic potential ranged from -65 to -75mV, resting potential from -45 to -50 mV and overshoot voltage about +20mV, respectively. Duration of the action potential taken from rapid upstroke to maximal diastolic potential was about 600 msec. Usual discharge rate was 30~35/min at room temperature(18~20℃). 2. In Ringer solution containing 50% Na(substituted by equimolar Tris) reduction of extracellular sodium concentrations diminished the amplitude and frequency of the action potential. And 0 and 11 mm Na hyperpolarize the restal membrane potential greatly. It suggest the resting Na Conductance is significantly high in sinus venosus. 3. Caesium(10mM), K-current blocker decreased pacemaker depolarization. Manganese(2mM) known to be Ca-current antagonist, blocked spontaneous activity completely. 4. Adrenaline and acetylcholine showed positive and negative chronotropic effect. It is concluded that K-, Na- and Ca-current components are involved in the genesis of spontaneous activity of the frog sinus venosus like other cardiac pacemaker tissues.

직업적 연폭로가 일부 신경행동학적 검사수행에 미치는 영향

안익수,안현철,김용배,리갑수,김화성,황규윤,최은,장봉기,이성수,안규동,이병국 순천향대학교 산업의학연구소 1999 순천향산업의학 Vol.5 No.1

In order to investigate that blood lead levels of lead exposed workers is associated with decreased performance in neurobehavioral tests in adults, we investigate 78 workers in a battery industry. Three items among neurobehavioral core test battery of World Health Organization, including digit span, Santa ana dexterity, digit symbol were administered to workers occupationally lead exposed workers by operational guide for the WHO neurobehavioral core test battery. Blood lead (PbB) and zinc protoporphyrin in whole blood (ZZP) were selected as an index of lead exposure. Detailed occupational history such as exposed agent, age, work duration, smoking and drinking habits, were recorded as confounding factors. After controlling age, the results of digit span and digit symbol among the neurobehavioral tests were significant contributed by PbB.

고관절 주위 대퇴 직건에 발생한 석회화 건염-1예보고-

성일보,황순호,안종국,정병현,염재광,황재광,정형진,김진호 대한고관절학회 2001 Hip and Pelvis Vol.13 No.1

Spreader의 종류와 Accessory cone의 적합성에 따른 근단폐쇄성에 관한 실험적 연구

안영미,최기운,민병순,최호영,박상진 慶熙大學校 齒科大學 1994 慶熙齒大論文集 Vol.16 No.1

accessory cone used in lateral condensation method. 120 plastic blocks with canal preformed were instrumented with K-H-files and Gates-Glidden bur. Shaped plastic blocks were divided into six experimental groups according to spreader and accessory cone used in lateral condensation. Then they were obturated by lateral condensation method without sealer. Six experimental groups were as follows: Group 1 Filling with #30 spreader & #25 gutta-percha cone Group 2 Filling with #30 spreader & Fine accessory cone Group 3 Filling with #3 spreader & #25 gutta-percha cone Group 4 Filling with #3 spreader & Fine accessory cone Group 5 Filling with #20,#30 spreader & #25 gutta-percha cone Group 6 Filling with #2, #3 spreader & Fine accessory cone All the blocks were stored in 100% humidor at room temperature for 2 days. Each block was placed in centrifuged for 20 minutes at 3,000 rpm Apical leakage was mesured from the apical foramen to the most coronal level of dye leakage in millimeter under a stereoscope. The data were analysed by ANOVA. The obtained results were as follows; 1: In groups using two spreaders(Group 5,6), the linear leakage was less than one spreader using groups(Group 1-4). 2. In groups using two spreaders(Group 5,6), there was no significant difference in linear leakage between standardized -spreader group and nonstandardized group (P>0.01). 3. When one spreader was used(Group 1-4), standardized-spreader groups showed less linear leakage than nonstandardized spreader groups(P<0.01). 4. In case of using same spreader(Groupl,2 & Group 3,4), there was no significant difference in linear leakage according to accessory cone type. 5. It needs to use one more spreaders to increase apical sealability.

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.