• 기록학연구
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• 제44호
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• pp.51-99
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• 2015

기록평가의 목적은 점차 기록의 선별에서 일종의 주제기반의 수집으로 옮겨가고 있다. 특히 현재의 디지털 기술과 웹의 양 질적 발달은 물리적 수집이 아닌 의미적 수집, 즉 데이터의 연계를 통한 수집을 가능하게 하는 원동력이 되고 있다. 이러한 환경하에서 유네스코를 필두로 국제적으로 '기록유산'에 대한 개념정립이 이루어지고 있다. 이러한 동향을 반영하고 있는 것이 캐나다의 LAC인데, 최근 토탈아카이브즈 정신을 부흥시키고자 새로운 평가방법이자 수집방법을 개발하고 있다. 이것이 'Whole-of-Society 접근법'이다. 이 접근법의 특징은 크게 세가지이다. 첫 번째, 기록유산을 대상으로 하며, 물리적 수집이 아니라 의미적 수집을 목적으로 한다. 또한 그 대상이 기록유산이기 때문에 반드시 기록유산기관 간의 협력이 전제되어야 한다. 마지막으로 이미 발생한 사건에 대한 기록화뿐만 아니라 동시대적 사건에 대한 기록화도 가능하다는 것이다. 평가방법으로서의 'Whole-of-Society 접근법'은 사회이론에 착안하여 사회 구성요소를 식별하는 방식이다. 수집방법으로서의 'Whole-of-Society 접근법'은 디지털기록을 대상으로 하나, 아날로그기록의 소장주체로 안내하는 방식으로 그 대상이 확장된다. 이때의 디지털기록이란 '디지털화된(Digitized)' 기록유산과 '본래 디지털인(Born-Digital)' 기록유산을 포함한다. 그리고 평가 단계에서 식별한 사회 구성요소를 메타데이터 요소로 매핑한 다음, 링크드오픈 데이터로 구축함으로써 데이터 간의 연계를 통한 의미적 수집을 실현한다. 마지막으로 이 연구에서는 국내 평가체계는 그 목적이 선별에 비교적 국한되어 있어 사회의 기록화를 실현하기 어렵다는 한계를 지적하였다. 이러한 한계를 극복하기 위하여 Whole-of-Society 접근법을 적용하여 가이드라인을 제시한다. 가이드라인은 총 8단계를 거치는데, 1단계부터 4단계는 기록화 대상의 선정과 기술이며 5단계부터 8단계는 디지털 환경에서 의미적 수집을 위한 준비절차라 할 수 있다. 한편 가이드라인의 실행을 위한 선행과제를 점검하며 국가기록원의 역할을 촉구한다.

• 동양고전연구
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• 제72호
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• pp.35-66
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• 2018

본고는 조귀명의 정관(靜觀)의 관찰방법과 골계의 문장 수사법을 살펴보았다. 그는 정관(靜觀)의 관찰방법을 통해 세상을 다르게 보려 했고, 골계(滑稽)의 문체 수법을 통해 세상과의 관계를 표현하였다. 정관(靜觀)은 주체와 대상을 새롭게 보는 방법이다. 주체의 감각과 사고를 신뢰하고 자신의 독자적 관점에서 천하의 사정과 이치를 분명하게 밝히는 것이었다. 이 경우 당대의 보편적 사고와 충돌하는 지점이 생긴다. 그는 보편적 사고와 독자적 관점의 충돌을 골계(滑稽)의 형식으로도 표현했다. 그는 사유와 행동 기준을 '기미(氣味)'와 '적의(適意)'에 두었다. 이는 세 가지 의미를 지닌다. 첫째 자신의 사유와 행동이 성인의 것과 다르지 않다는 자부심이다. 둘째, 자신은 타인과 구별되는 감성과 사고를 가진 독립적 존재라는 것이다. 셋째, 이에 근거하여 자신의 문학 작품은 독자적 가치를 지닌다는 것이다. 이러한 사유와 행동은 정관(靜觀)의 관찰 방법을 통해 구체화 되었다. 그가 정관(靜觀)의 3단계 과정을 통해 얻은 것은 '호연(浩然)한 마음'이다. 첫 번째 단계는 자기 성찰이다. 그 목적은 '호연(浩然)한 마음'으로 '물래순응(物來順應)'의 경지에 도달하는 것이다. 관찰 기준은 승제(乘除)의 이치이다. 두 번째 대상은 '물지정상(物之情狀)'이다. 그 관찰 대상은 쇠똥구리가 똥덩어리를 굴리는 모습까지 넓어진다. 세 번째 관찰대상은 조화자이다. 조화자의 움직임에 동참하는 것이다. 따라서 자신의 사유와 행동, 문학 작품은 조화자의 움직임과 대등한 의미를 지닌다고 본다. 그는 서술 방법이 자득한 내용에 따라 변화할 수 있다고 하였다. 문장 표현을 조탁하든, 질박하게 하든, 검담하게 하든, 농염하고 화려하게 하든 상황에 맞게 하면 된다는 것이다. 대표적 예로 <성보형화상찬(成甫兄畵像贊)>을 분석하였다. 그는 박문수에 대한 당대의 일반적 평가와 달리 '병든 학'과 '새장 속에 갇힌 학'으로 비유를 하였다. 사적 공간에서 골계를 좋아하는 박문수의 습관과 초상화의 외형적 특징을 연계하여 그의 공적 이미지를 파괴한 것이다. 이를 통해 박문수가 자연 속에 사는 학의 본성을 가지고 있지만, 관료 생활에서 벗어나지 못하는 처세를 웃음을 유도하며 폭로 혹은 비판하고 있다. 이러한 골계의 수사법은 조귀명 산문이 가지는 대표적 특징 중 하나이다. 추후 논문에서 <왜려설(倭驢說)>, <장공예백인설(張公藝百忍說)>, <기몽(記夢)>, <홍앵무부(紅鶯鵡賦)> 등을 골계의 측면에서 구체적으로 살펴보고자 한다.

• 헤리티지:역사와 과학
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• 제55권1호
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• pp.243-263
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• 2022

조선 왕실에서는 영원불멸한 왕의 존재와 권위를 나타내고자 일월오봉도로 병풍을 만들어 왕의 공간마다 설치하였다. 일월오봉도는 궁궐의 가장 대표적인 의장물로 알려져 있지만, 다양한 형태로 제작했던 병풍의 실체에 대해서는 제대로 연구된 바가 없다. 이것은 현재 전하는 유물이 기록과 일치하지 않은 경우가 많기 때문이다. 본 글에서는 의궤를 중심으로, 왕실 의례에 사용했던 일월오봉도 병풍의 다양한 생김새와 장황 재료에 대해 살펴보았다. 그리고 그동안 제대로 알려지지 않았던 일월오봉도 병풍의 원형과 변형 과정까지 함께 고찰하였다. 의례용으로 제작한 왕실의 병풍들은 예식과 법도에 따라 엄격하게 제작되었고, 각각이 갖는 위상에 따라 장황에 사용하는 재료 또한 차등을 두었다. 궁궐의 정전(正殿)과 빈전(殯殿), 혼전(魂殿), 진전(眞殿)에 설치했던 오봉병과 궁중연향을 위해 제작했던 오봉병은 생김새와 크기는 모두 다르지만, 병풍을 꾸미는 비단 회장(回粧)은 일치하였다. 대체로 초록색 비단으로 가장자리를 두르고, 그 위에 꽃문양의 금박을 장식하였다. 쪽풀로 염색한 초록색 비단은 원료를 수입해야 하는 값비싼 붉은 색 비단을 대신하였으며, 영조22년 '문단(紋緞) 금지 조치' 이후에는 무늬없는 초록색 평직 비단을 사용했다. 그나마 비단에 올린 금박 첩금으로 인해 사대부가의 병풍과 차별되는 궁중 의례용 병풍의 장식미를 더하였다. 일제강점기 동안 방치되었던 조선왕실의 병풍들은 1960년대부터 유물을 관리하는 차원에서, 보존처리가 이루어졌다. 그 과정에서 장황이 개장(改粧)되었고, 원형의 모습을 많이 잃게 되었다. 이것은 전통의 장황 문화가 단절된 것이 가장 주된 원인이었다. 과거에는 고증의 부족으로 문화재를 온전하게 보존하는 데 한계가 있었다면, 지금부터는 각 분야에 축적된 연구 성과를 바탕으로 고증을 철저히 하고, 문화재의 수리 이력에 대한 정보까지 체계적으로 보존하고, 관리하는 노력이 필요할 것이다.

• 인지과학
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• 제33권2호
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• pp.109-133
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• 2022

일화기억은 핵심 이벤트와 그에 연합된 맥락으로 구성된다. 해마와 해마 주변 영역이 일화기억의 부호화에서 맥락을 표상하는 역할에 관해 연구되어왔지만, 시공간적 맥락 외에 다양한 맥락-특이적 정보들에 대한 표상에 관한 연구는 많지 않다. 본 연구에서는 고해상도 자기기능공명기법을 이용하여 여러 맥락정보(예, 육하원칙 - 누가, 왜, 무엇을 언제, 어디서, 어떻게)의 부호화에 관여하는 내측두엽 및 대뇌피질 신경연결성의 특징을 탐색하였다. 참가자들은 두 명의 얼굴과 하나의 사물로 구성된 실험 이벤트를 보면서 여섯가지 맥락 부호화 과제를 수행하였다. 휴지기 기능적 자기공명영상 정보를 활용해 내측두엽의 세부 영역을 기능적으로 구분하였고 맥락 기억 과제별 기능적 신경연결성 네트워크를 탐색하였다. 일반선형화 모델 분석을 통해 시공간적 맥락정보를 처리할 때보다 사회적, 행동적, 의도 맥락을 연합할 때 내측두엽의 세부영역, 전전두엽, 하부두정엽 영역이 유의미하게 증가한 활성화를 보이며 관여함을 확인하였다. 나아가 이 영역들과 내측두엽 영역이 맥락조건간 차이에 관여하는 기능적 연결성 특징을 탐색하기 위하여 맥락부호화 과제를 수행하는 동안의 해마세부영역들과 전전두엽, 하부두정엽 등 간의 과제기반 기능적 연결성 정보들을 다변량 패턴분석의 주요입력변수로 선정하였고, 기계학습을 통해 맥락 조건 간 연결성 패턴분류를 시도하였다. 네트워크 패턴분류에서도 시공간 맥락 조건과 각 사회적, 행동적, 의도 맥락처리 조건 간에는 기능적 연결성의 차이가 두드러졌다. 본 연구결과를 통해 일화기억에서 특정 맥락을 처리하는 신경학적 기제의 특성과 맥락 조건 간 차이를 제시하였다.

• 대순사상논총
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• 제33집
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• pp.219-255
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• 2019

'도(道)'는 동아시아 종교 사상의 관점에서 '궁극적 실재'를 나타내는 주요한 용어이다. 대순사상이 지향점으로 삼고 있는 도통진경에 이르기 위해서는 도(道)에 대한 개념의 이해가 필수적으로 선행되어야 할 것이다. 『전경(典經)』에는 금문(金文)에 처음 등장하는 '길'로서의 도에서부터 음양(陰陽)의 도, 인도(人道), 천도(天道) 등 각기 다양한 도의 개념이 나타나고 있다. 이를 상도(常道), 천도(天道), 신도(神道), 인도(人道), 상생(相生)의 도 다섯 가지 '도'로 분류하였다. 우주만물의 생성과 성장, 소멸하는 모든 자연현상은 천지자연의 이치이다. 따라서 대순사상에서의 상도는 자연계와 신계뿐만 아니라 인간계에도 적용되는 영원불변의 진리이자 천지의 운행 법칙으로 인간의 행위에도 궁극적인 준칙이 된다. 천도(天道)는 천을 주재하고 통제 관장한다는 관점에서 구천상제의 '대순진리'이자 세상을 구제하는 '제세대도'라고 본다. 신도는 모사재천 성사재인에 의해 '신의 법칙과 뜻에 따라 인간이 일을 완성해야 하는 도' 즉 '상제의 천명에 의해 신과 인간이 인의예지를 지향점으로 함께 신인합일을 이루는 도'라고 할 수 있다. 세상이 우환과 위기에 빠졌을 때 요청되는 성인의 도를 『전경』에서는 요순의 도로 상징하고 있다. 진멸해 가는 세상에서 천하를 구하고 창생을 구제하는 대순사상의 성인의 도는 '제생 의세(濟生醫世)'라 한다. 제생의세는 구천상제의 천명인 제세대도를 따르는 인간의 도리라 할 수 있으며 대순사상의 인도(人道)의 특징이라고 볼 수 있다. 상생의 도는 '상도를 다시 세우고 제생의세의 인도를 펼치는 도'이며 남을 잘되게 해야 내가 사는 후천의 윤리로 상극적 세상을 바로 잡는 진법이라고 할 수 있다. 이를 종합하면 천계와 지계, 신계와 인간계 모든 곳에 치우침 없이 적용되고 작동되는 구천상제의 제세대도로서 대순진리라고 할 수 있다. 대순사상의 도는 그것이 등장한 시대적 배경과 사상적 특징을 담고 있다. 중국 고전에서 말하는 도와 동아시아의 사상을 대표하는 유·불·도에서 전개하는 도의 전통적 개념을 수용하면서도 특별히 신앙대상으로서의 상제의 의지를 내포하고 있다는 점에서 특수성을 보인다. 대순사상은 도 개념을 규정하는 과정에서 한국 근대의 민족종교사상이 지닌 보편성과 특수성의 양 갈래를 조화하고 발전시키면서 전개되어 나왔다는 것을 알 수 있다.

• 대순사상논총
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• 제31집
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• pp.199-235
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• 2018

대다수의 증산계 종단들은 증산의 종교사상이 단군사상을 그대로 재현한 것이라는 주장을 펼쳐왔다. 그러나 증산계 종단 가운데 거의 유일하게 대순진리회만큼은 1909년 종단 초기부터 지금까지 줄곧 단군과 일정한 거리를 유지하고 있다. 대순진리회의 신앙 대상이나 교리체계 그 어디에도 단군의 흔적은 발견되지 않는다. 단군에 대한 대순진리회와 타 증산계 종단들의 입장이 다른 이유를 찾기 위한 하나의 방편으로 이 글은 대순사상과 단군사상이 서로 연결될 수 있는지, 그 가능성을 검토해 본 것이다. 구체적으로는 대순사상과 단군사상의 서사구조와 모티프를 비교 분석한 것이 이 글의 핵심 내용이다. 사실 증산께서는 단군에 대해 별다른 언급을 하신 적이 없으셨다. 그러므로 증산 화천 후 해방 이전까지는 대순진리회를 포함한 모든 증산계 종단들이 단군사상에 주목하지도 않았고 단군을 신앙의 대상 가운데 하나로 여기지도 않았다. 해방 이후가 되면 한국사회에 민족의 구심점으로 단군이 크게 대두되고, 단군을 중심으로 한국인이 하나로 뭉쳐야 한다는 단군민족주의가 사회에 막대한 영향을 미치기 시작했다. 거의 모든 증산계 종단들은 거기에 편승하여 그들의 신앙과 교리를 변용시켰다. 명백히 그것은 시류를 이용하여 포교에 도움을 얻고자 했기 때문이었다. 오직 대순진리회만큼은 교조의 가르침이 아니므로 단군민족주의를 받아들이지 않았다. 또한 사상적인 측면에서도 유사점보다는 차이점을 더 많이 갖고 있다. 이상과 같은 이유로 해서 대순진리회는 단군을 교리나 신앙 체계에 채택하고 있지 않다고 생각된다.

• 대한의용생체공학회:의공학회지
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• 제6권2호
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• pp.1-8
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• 1985

The wall shear stress in the vicinity of end-to end anastomoses under steady flow conditions was measured using a flush-mounted hot-film anemometer(FMHFA) probe. The experimental measurements were in good agreement with numerical results except in flow with low Reynolds numbers. The wall shear stress increased proximal to the anastomosis in flow from the Penrose tubing (simulating an artery) to the PTFE: graft. In flow from the PTFE graft to the Penrose tubing, low wall shear stress was observed distal to the anastomosis. Abnormal distributions of wall shear stress in the vicinity of the anastomosis, resulting from the compliance mismatch between the graft and the host artery, might be an important factor of ANFH formation and the graft failure. The present study suggests a correlation between regions of the low wall shear stress and the development of anastomotic neointimal fibrous hyperplasia(ANPH) in end-to-end anastomoses. 30523 T00401030523 ^x Air pressure decay(APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those roused in patients several times. C-DAK 4000 (Cordis Dow) and CF IS-11 (Baxter Travenol) reused dialyzers obtained from the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAH dialyzers had a larger APD(11.70$\pm$1.32mmHg/min)compared to CF dialyzers(4.32$\pm$0.55mmHg/min)(p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHe/min)on the reused dialyzers(2 out of 40 CP and S out 26 C-DAK) were attributed to the Possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD is a more sensitive test than UFR test to evaluate the integrity of the fibers. 30527 T00401030527 ^x For quantitative measurement of reflected light from a clinical diagnostic strip, a prototype old reflectance photometer was designed. The strip loader and cassette were made to obtain more accurate reflectance parameters. The strip was illuminated at 45˚c through optical fiber and the intensity of reflected light was determined at rectanguLat angle using a photodiode. The kubelka-munk coefficient and reflection optical density were determined ar four different wavelengths(500, 550, 570 and 610nm) for blood glucose strip. For higher concentration than 300mg/41 about glucose, a saturation state of abforbance was observed at 500, 550 and 570nm. The correlation between glucose concentration and parameters was the best at 610nm. 30535 T00401030535 ^x Radiation-induced fibrosarcoma tumors were grown on the flanks of C3H mice. The mice were divided into two groups. One group was injected with Photofrin II, intravenously (2.5mg/kg body weight). The other group received no Photofrin II. Mice from both groups were irradialed for approximately 15 minutes at 100, 300, or 500 mW/cm2 with the argon (488nm/514.5 nm), dye(628nm) and gold vapor (pulsed 628 nm) laser light. A photosensitizer behaved as an added absorber. Under our experimental conditions, the presence of Photolfrin II increased surface temperature by at least 40% and the temperature rise due to 300 mW/cm2 irradiation exceeded values for hyperthermia. Light and temperature distributions with depth were estimated by a computer model. The model demonstrated the influence of wavelength on the thermal process and proved to be a valuable tool to investigate internal temperature rise. 30536 T00401030536 ^x We investigated the structural geometry of thirty-eight Korean femurs. The purpose of this study is to identify major geometrical differences between Korean femurs 3nd others that we believe belong to Caucasians so that we would be able to get insights into the femoral component design that fits Asians including Koreans. We utilized computerized tomography (CT) images of femurs extracted from cadavers. The CT images were transformed into bitmap data by using a film scanner, and then analyzed by using a commercially available software called Image v.1.0 and a Macintosh IIci computer.The resulting data were compared with already published data. The major results show that the geometry of the Korean femurs is significantly different from that of Caucasians: (1) the anteversion angle and the canal flare index are greater by the amount of approximately 8˚ and 0.5, respectively, (2) the shape of the isthmus cross section is more round, and (3) the distance between the teaser trochanter and the proximal border of the isthmus is shelter by about 15 mm. The results suggested that the femoral component suitable for Asians should be different from the currently-used components designed and manufactured mostly by European or American companies. 30537 T00401030537 ^x It is well known that nonlinear propagation characteristics of the wave in the tissue may give very useful information for the medical diagnoisis. In this paper, a new method to detect nonlinear propagation characteristics of the internal vibration in the tissue for the low frequency mechanical vibration by using bispectral analysis is proposed. In the method, low frequency vibration of f0( = 100Hz) is applied on the surface of the object, and the waveform of the internal vibration x (t) is measured from Doppler frequency modulation of silmultaneously transmitted probing ultrasonic waves. Then, the bispectra of the signal x (t) at the frequencies (f0, f0) and (f0, 2f0) are calculated to estimate the nonlinear propagation characteristics as their magnitude ratio, w here since bispectrum is free from the gaussian additive noise we can get the value with high S/N. Basic experimental system is constructed by using 3.0 MHz probing ultrasonic waves and the several experiments are carried out for some phantoms. Results show the superiority of the proposed method to the conventional method using power spectrum and also its usefulness for the tissue characterization. 30541 T00401030541 ^x This paper describes the implementation of a computerized radial pulse diagnosis by aids of a clinical expert. On this base, we composed of the radial pulse diagnosis system in korean traditional medicine. The system composed of a radial pulse wave detection system and a radial pulse diagnosis system. With a detection system, we detected Inyoung and Cheongu radial pulse wave and processed it. Then, we have got the characteristic parameters of radial pulse wave and also quantified that according to the method of Inyoung-Cheongu Comparison Radial Pulse Diagnosis. We defined the jugement standard of radial pulse diagnosis system and then we confirmed the possibility for realization of automatic radial pulse diagnosis in korean traditional medicine. 30545 T00401030545 ^x Microspheres are expected to be applied to biomedical areas such as solid-phase immunoassays, drug delivery systems, immunomagnetic cell separation. To synthesize microspheres for biomedical application, "two stage shot growth method" was developed. The uniformity ratio of synthesized microspheres was always smaller than 1.05. And the surface charge density (or the number of ionizable functional groups) of the microspheres synthesized by "two stage shot growth method" was 6~13 times higher than that of the microspheres synthesized by conventional seeded batch copolymerization. As a previous step for biomedical application, adsorption experiments of bovine albumin on microspheres were carried out under various conditions. The maximum adsorbed amount was obtained in the neighborhood of pH 4.5. Isoelectric point of bovine albumin is pH 5.0, so experimental result shows that it shifted to acid area. The adsorption isotherm was obtained, the plateau region was always reached at 2.Og/L (bulk concentration of bovine albumin).The effect of the kind and the amount of surface functional group was also examined. 30575 T00401030575 ^x A medical image workstation was developed using multimedia technique. The system based on PC-486DX was designed to acquire medical images produced by medical imaging instruments and related audio information, that is, doctors' reporting results. Input information was processed and analyzed, then the results were presented in the form of graph and animation. All the informations of the system were hierarchically related with the image as the apex. Processing and analysis algorithms were implemented so that the diagnostic accuracy could be improved. The diagnosed information can be transferred for patient diagnosis through LAN(local area network). 30592 T00401030592 ^x In the conventional infrared imaging system, complex infrared lens systems are usually used for directing collimated narrow infrared beams into the high speed 2-dimensional optic scanner. In this paper, a simple reflective infrared optic system with a 2-dimensional optic scanner is proposed for the realization of medical infrared thermography system. It has been experimentally proven that the intfrared thermography system composed of the proposed optic system has the temperature resolution of 0.1˚c under the spatial resolution of lmrad, the image matrix size of 256 X 240, and tile imaging time of 4 seconds. 30593 T00401030593 ^x In this paper, MIIS (Medical Image Information System) has been designed and implemented using INGRES RDBMS, which is based on a client/server architecture. The implemented system allows users to register and retrieve patient information, medical images and diagnostic reports. It also provides the function to display these information on workstation windows simultaneously by using the designed menu-driven graphic user interface. The medical image compression/decompression techniques are implemented and integrated into the medical image database system for the efficient data storage and the fast access through the network. 30594 T00401030594 ^x In this paper, computerized BEAM was implemented for the space domain analysis of EEG. Trans-formation from temporal summation to two-dimensional mappings is formed by 4 nearest point inter-polaton method. Methods of representation of BEAM are two. One is dot density method which classify brain electrical potential 9 levels by dot density of gray levels and the other is colour method which classify brain electrical 12 levels by red-green colours. In this BEAM, instantaneous change and average energy distribution over any arbitrary time interval of brain electrical activity could be observed and analyzed easily. In the frequency domain, the distribution of energy spectrum of a special band can easily be distinguished normality and abnormality. 30608 T00401030608 ^x Laboratory information system (LIS) is a key tool to manage laboratory data in clinical pathology. Our department has developed an information system for routine hematology using down-sized computer system. We have used an IBM 486 compatible PC with 16MB main memory, 210 MB hard disk drive, 9 RS-232C port and 24 pin dot printer. The operating system and database management system were SCO UNIX and SCO foxbase, respectively. For program development, we used Xbase language provided by SCO foxbase. The C language was used for interface purpose. To make the system use friendly, pull-down menu was used. The system connected to our hospital information system via application program interface (API), so the information related to patient and request details is automatically transmitted to our computer. Our system interfaced with fwd complete blood count analyzers(Sysmex NE-8000 and Coulter STKS) for unidirectional data tansmission from analyzer to computer. The authors suggests that this system based on down-sized computer could provide a progressive approach to total LIS based on local area network, and the implemented system could serve as a model for other hospital's LIS for routine hematology. 30609 T00401030609 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed a composite that is consisted of calcium phosphate and collagen. To use as the structural matrix of the composite, collagen was purified from human umbilical cord. The obtained collagen was treated by pepsin to remove telopeptides, and finally, the immune-free atelocollagen was produced: The cross linked atelocollagen was highly resistant to the collagenase induced collagenolysis. The cross linked collagen demonstrated an improved tensile strength. 30618 T00401030618 ^x This paper is a study on the design of adptive filter for QRS complex detection. We propose a simple adaptive algorithm to increase capability of noise cancelation in QRS complex detection with two stage adaptive filter. At the first stage, background noise is removed and at the next stage, only spectrum of QRS complex components is passed. Two adaptive filters can afford to keep track of the changes of both noise and QRS complex. Each adaptive filter consists of prediction error filter and FIR filter The impulse response of FIR filter uses coefficients of prediction error filter. The detection rates for 105 and 108 of MIT/BIH data base were 99.3% and 97.4% respectively. 30619 T00401030619 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed and produced a composite that is consisted of calcium phosphate and collagen. Human umbilical cord origin pepsin treated type I atelocollagen was used as the structural matrix, by which sintered or non-sintered carbonate apatite was encapsulated to form an inorganic-organic composite. With cross linking atelocollagen by UV ray irradiation, the resistance to both compressive and tensile strength was increased. Collagen degradation by the collagenase induced collagenolysis was also decreased. 30620 T00401030620 ^x We have developed a monoleaflet polymer valve as an inexpensive and viable alternative, especially for short-term use in the ventricular assist device or total artificial heart. The frame and leaflet of the polymer valve were made from polyurethane, To evaluate the hemodynamic performance of the polymer valve a comparative study of flow dynamics past a polymer valve and a St. Jude Medical prosthetic valve under physiological pulsatile flow conditions in vitro was made. Comparisons between the valves were made on the transvalvular pressure drop, regurgitation volume and maximum valve opening area. The polymer valve showed smaller regurgitation volume and transvalvular pressure drop compared to the mechanical valve at higher heart rate. The results showed that the functional characteristics of the polymer valve compared favorably with those of the mechanical valve at higher heart rate. 30621 T00401030621 ^x Explosive evaporative removal process of biological tissue by absorption of a CW laser has been simulated by using gelatin and a multimode Nd:YAG laser. Because the point of maximun temperature of laser-irradiated gelatin exists below the surface due to surface cooling, evaporation at the boiling temperature is made explosively from below the surface. The important parameters of this process are the conduction loss to laser power absorption (defined as the conduction-to-laser power parameter, Nk), the convection heat transfer at the surface to conduction loss (defined as Bi), dimensionless extinction coefficient (defined as Br.), and dimensionless irradiation time (defined as Fo). Dependence of Fo on Nk and Bi has been observed by experiment, and the results have been compared with the numerical results obtained by solving a 2-dimensional conduction equation. Fo and explosion depth (from the surface to the point of maximun temperature) are increased when Nk and Bi are increased.To find out the minimum laser power for explosive evaporative removal process, steady state analysis has been also made. The limit of Nk to induce evaporative removal, which is proportional to the inverse of the laser power, has been obtained. 30622 T00401030622 ^x N1 and N2 gross neural action potentials were measured from the round window of the guinea pig cochlea at the onset of the acoustic stimuli. N1-N2 audiograms were made by means of regulating stimulant intensities in order to produce constant N1-N2 potentials as criteria for different input tone pip frequencies. The lowest threshold was measured with an input tone pip I5 dB SPL in intensity and 12 KHz in frequency when the animal was in normal physiological condition. The procedure of experimental measurements is explained in detail. This experimental approach is very useful for the investigation of the Cochlear function. Both noN1inear and active functions of the Cochlea can be monitored by N1-N2 audiograms. 30623 T00401030623 ^x In electrical impedance tomography(EIT), we use boundary current and voltage measurements toprovide the information about the cross-sectional distribution of electrical impedance or resistivity. One of the major problems in EIT has been the inaccessibility of internal voltage or current data in finding the internal impedance values. We propose a new image reconstruction method using internal current density data measured by NMR. We obtained a two-dimensional current density distribution within a phantom by processing the real and imaginary MR images from a 4.77 NMR machine. We implemented a resistivity mage reconstruction algorithm using the finite element method and sensitivity matrix. We presented computer simulation results of the mage reconstruction algorithm and furture direction of the research. 30624 T00401030624 ^x A new method of digital image analysis technique for discrimination of cancer cell was presented in this paper. The object image was the Thyroid eland cells image that was diagnosed as normal and abnormal (two types of abnormal: follicular neoplastic cell, and papillary neoplastic cell), respectively. By using the proposed region segmentation algorithm, the cells were segmented into nucleus. The 16 feature parameters were used to calculate the features of each nucleus. A9 a consequence of using dominant feature parameters method proposed in this paper, discrimination rate of 91.11% was obtained for Thyroid Gland cells. 30625 T00401030625 ^x An electrical stimulator was designed to induce locomotion for paraplegic patients caused by central nervous system injury. Optimal stimulus parameters, which can minimize muscle fatigue and can achieve effective muscle contraction were determined in slow and fast muscles in Sprague-Dawley rats. Stimulus patterns of our stimulator were designed to simulate electromyographic activity monitored during locomotion of normal subjects. Muscle types of the lower extremity were classified according to their mechanical property of contraction, which are slow muscle (msoleus m.) and fast muscle (medial gastrocneminus m., rectus femoris m., vastus lateralis m.). Optimal parameters of electrical stimulation for slow muscles were 20 Hz, 0.2 ms square pulse. For fast muscle, 40 Hz, 0.3 ms square pulse was optimal to produce repeated contraction. Higher stimulus intensity was required when synergistic muscles were stimulated simultaneously than when they were stimulated individually. Electrical stimulation for each muscle was designed to generate bipedal locomotion, so that individual muscles alternate contraction and relaxation to simulate stance and swing phases. Portable electrical stimulator with 16 channels built in microprocessor was constructed and applied to paraplegic patients due to lumbar cord injury. The electrical stimulator restored partially gait function in paraplegic patients. 30626 T00401030626 ^x Two-Dimensional modelling of the Cochlear biomechanics is presented in this paper. The Laplace partial differential equation which represents the fluid mechanics of the Cochlea has been transformed into two-dimensional electrical transmission line. The procedure of this transformation is explained in detail. The comparison between one and two dimensional models is also presented. This electrical modelling of the basilar membrane (BM) is clearly useful for the next approach to the further. Development of active elements which are essential in the producing of the sharp tuning of the BM. This paper shows that two-dimension model is qualitatively better than one-dimensional model both in amplitude and phase responses of the BM displacement. The present model is only for frequency response. However because the model is electrical, the two-dimensional transmission line model can be extended to time response without any difficult. 30627 T00401030627 ^x A method has been proposed for the fully automatic detection of left ventricular endocardial boundary in 2D short axis echocardiogram using geometric model. The procedure has the following three distinct stages. First, the initial center is estimated by the initial center estimation algorithm which is applied to decimated image. Second, the center estimation algorithm is applied to original image and then best-fit elliptic model estimation is processed. Third, best-fit boundary is detected by the cost function which is based on the best-fit elliptic model. The proposed method shows effective result without manual intervention by a human operator. 30628 T00401030628 ^x The intelligent trajectory control method that controls moving direction and average velocity for a prosthetic arm is proposed by pattern recognition and force estimations using EMG signals. Also, we propose the real time trajectory planning method which generates continuous accelleration paths using 3 stage linear filters to minimize the impact to human body induced by arm motions and to reduce the muscle fatigue. We use combination of MLP and fuzzy filter for pattern recognition to estimate the direction of a muscle and Hogan's method for the force estimation. EMG signals are acquired by using a amputation simulator and 2 dimensional joystick motion. The simulation results of proposed prosthetic arm control system using the EMf signals show that the arm is effectively followed the desired trajectory depended on estimated force and direction of muscle movements. 30638 T00401030638 ^x A new neural network architecture for the recognition of patterns from images is proposed, which is partially based on the results of physiological studies. The proposed network is composed of multi-layers and the nerve cells in each layer are connected by spatial filters which approximate receptive fields in optic nerve fields. In the proposed method, patterns recognition for complicated images is carried out using global features as well as local features such as lines and end-points. A new generating method of matched filers representing global features is proposed in this network. 30659 T00401030659 ^x An implementation scheme of the magnetic nerve stimulator using a switching mode power supply is proposed. By using a switching mode power supply rather than a conventional linear power supply for charging high voltage capacitors, the weight and size of the magnetic nerve stimulator can be considerably reduced. Maximum output voltage of the developed magnetic nerve stimulator using the switching mode power supply is 3, 000 volts and switching time is about 100 msec. Experimental results or human nerve stimulations using the developed stimulator are presented. 30768 T00401030768 ^x In this paper, we describe the design methodology and specifications of the developed module-based bedside monitors for patient monitoring. The bedside monitor consists of a main unit and module cases with various parameter modules. The main unit includes a 12.1" TFT color LCD, a main CPU board, and peripherals such as a module controller, Ethernet LAN card, video card, rotate/push button controller, etc. The main unit can connect at maximum three module cases each of which can accommodate up to 7 parameter modules. They include the modules for electrocardiograph, respiration, invasive blood pressure, noninvasive blood pressure, temperature, and SpO2 with Plethysmograph.SpO2 with Plethysmograph.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 1993년도 한국우주과학회보 제2권2호
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• pp.17-17
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• 1993

The wall shear stress in the vicinity of end-to end anastomoses under steady flow conditions was measured using a flush-mounted hot-film anemometer(FMHFA) probe. The experimental measurements were in good agreement with numerical results except in flow with low Reynolds numbers. The wall shear stress increased proximal to the anastomosis in flow from the Penrose tubing (simulating an artery) to the PTFE: graft. In flow from the PTFE graft to the Penrose tubing, low wall shear stress was observed distal to the anastomosis. Abnormal distributions of wall shear stress in the vicinity of the anastomosis, resulting from the compliance mismatch between the graft and the host artery, might be an important factor of ANFH formation and the graft failure. The present study suggests a correlation between regions of the low wall shear stress and the development of anastomotic neointimal fibrous hyperplasia(ANPH) in end-to-end anastomoses. 30523 T00401030523 ^x Air pressure decay(APD) rate and ultrafiltration rate(UFR) tests were performed on new and saline rinsed dialyzers as well as those roused in patients several times. C-DAK 4000 (Cordis Dow) and CF IS-11 (Baxter Travenol) reused dialyzers obtained from the dialysis clinic were used in the present study. The new dialyzers exhibited a relatively flat APD, whereas saline rinsed and reused dialyzers showed considerable amount of decay. C-DAH dialyzers had a larger APD(11.70${\pm}$1.32mmHg/min)compared to CF dialyzers(4.32${\pm}$0.55mmHg/min)(p<0.05). However, there was no observable difference in the UFR between the two dialyzers. Neither APD nor UFR showed any significant increase with an increasing number of reuses for up to more than 20reuses. A substantial number of failures observed in APD(larger than 20mmHe/min)on the reused dialyzers(2 out of 40 CP and S out 26 C-DAK) were attributed to the Possible damage on the fibers. The CF 15-11 HFDs which failed APD test did not show changes in the UFR compared to normal dialyzers indicating that APD is a more sensitive test than UFR test to evaluate the integrity of the fibers. 30527 T00401030527 ^x For quantitative measurement of reflected light from a clinical diagnostic strip, a prototype old reflectance photometer was designed. The strip loader and cassette were made to obtain more accurate reflectance parameters. The strip was illuminated at 45˚c through optical fiber and the intensity of reflected light was determined at rectanguLat angle using a photodiode. The kubelka-munk coefficient and reflection optical density were determined ar four different wavelengths(500,550,570 and 610nm) for blood glucose strip. For higher concentration than 300mg/41 about glucose, a saturation state of abforbance was observed at 500,550 and 570nm. The correlation between glucose concentration and parameters was the best at 610nm. 30535 T00401030535 ^x Radiation-induced fibrosarcoma tumors were grown on the flanks of C3H mice. The mice were divided into two groups. One group was injected with Photofrin II, intravenously (2.5mg/kg body weight). The other group received no Photofrin II. Mice from both groups were irradialed for approximately 15 minutes at 100,300, or 500 mW/cm2 with the argon (488nm/514.5 nm), dye(628nm) and gold vapor (pulsed 628 nm) laser light. A photosensitizer behaved as an added absorber. Under our experimental conditions, the presence of Photolfrin II increased surface temperature by at least 40% and the temperature rise due to 300 mW/cm2 irradiation exceeded values for hyperthermia. Light and temperature distributions with depth were estimated by a computer model. The model demonstrated the influence of wavelength on the thermal process and proved to be a valuable tool to investigate internal temperature rise. 30536 T00401030536 ^x We investigated the structural geometry of thirty-eight Korean femurs. The purpose of this study is to identify major geometrical differences between Korean femurs 3nd others that we believe belong to Caucasians so that we would be able to get insights into the femoral component design that fits Asians including Koreans. We utilized computerized tomography (CT) images of femurs extracted from cadavers. The CT images were transformed into bitmap data by using a film scanner, and then analyzed by using a commercially available software called Image v.1.0 and a Macintosh IIci computer.The resulting data were compared with already published data. The major results show that the geometry of the Korean femurs is significantly different from that of Caucasians: (1) the anteversion angle and the canal flare index are greater by the amount of approximately 8˚ and 0.5, respectively, (2) the shape of the isthmus cross section is more round, and (3) the distance between the teaser trochanter and the proximal border of the isthmus is shelter by about 15 mm. The results suggested that the femoral component suitable for Asians should be different from the currently-used components designed and manufactured mostly by European or American companies. 30537 T00401030537 ^x It is well known that nonlinear propagation characteristics of the wave in the tissue may give very useful information for the medical diagnoisis. In this paper, a new method to detect nonlinear propagation characteristics of the internal vibration in the tissue for the low frequency mechanical vibration by using bispectral analysis is proposed. In the method, low frequency vibration of f0( = 100Hz) is applied on the surface of the object, and the waveform of the internal vibration x (t) is measured from Doppler frequency modulation of silmultaneously transmitted probing ultrasonic waves. Then, the bispectra of the signal x (t) at the frequencies (f0, f0) and (f0, 2f0) are calculated to estimate the nonlinear propagation characteristics as their magnitude ratio, w here since bispectrum is free from the gaussian additive noise we can get the value with high S/N. Basic experimental system is constructed by using 3.0 MHz probing ultrasonic waves and the several experiments are carried out for some phantoms. Results show the superiority of the proposed method to the conventional method using power spectrum and also its usefulness for the tissue characterization. 30541 T00401030541 ^x This paper describes the implementation of a computerized radial pulse diagnosis by aids of a clinical expert. On this base, we composed of the radial pulse diagnosis system in korean traditional medicine. The system composed of a radial pulse wave detection system and a radial pulse diagnosis system. With a detection system, we detected Inyoung and Cheongu radial pulse wave and processed it. Then, we have got the characteristic parameters of radial pulse wave and also quantified that according to the method of Inyoung-Cheongu Comparison Radial Pulse Diagnosis. We defined the jugement standard of radial pulse diagnosis system and then we confirmed the possibility for realization of automatic radial pulse diagnosis in korean traditional medicine. 30545 T00401030545 ^x Microspheres are expected to be applied to biomedical areas such as solid-phase immunoassays, drug delivery systems, immunomagnetic cell separation. To synthesize microspheres for biomedical application, "two stage shot growth method" was developed. The uniformity ratio of synthesized microspheres was always smaller than 1.05. And the surface charge density (or the number of ionizable functional groups) of the microspheres synthesized by "two stage shot growth method" was 6~13 times higher than that of the microspheres synthesized by conventional seeded batch copolymerization. As a previous step for biomedical application, adsorption experiments of bovine albumin on microspheres were carried out under various conditions. The maximum adsorbed amount was obtained in the neighborhood of pH 4.5. Isoelectric point of bovine albumin is pH 5.0, so experimental result shows that it shifted to acid area. The adsorption isotherm was obtained, the plateau region was always reached at 2.Og/L (bulk concentration of bovine albumin).The effect of the kind and the amount of surface functional group was also examined. 30575 T00401030575 ^x A medical image workstation was developed using multimedia technique. The system based on PC-486DX was designed to acquire medical images produced by medical imaging instruments and related audio information, that is, doctors' reporting results. Input information was processed and analyzed, then the results were presented in the form of graph and animation. All the informations of the system were hierarchically related with the image as the apex. Processing and analysis algorithms were implemented so that the diagnostic accuracy could be improved. The diagnosed information can be transferred for patient diagnosis through LAN(local area network). 30592 T00401030592 ^x In the conventional infrared imaging system, complex infrared lens systems are usually used for directing collimated narrow infrared beams into the high speed 2-dimensional optic scanner. In this paper, a simple reflective infrared optic system with a 2-dimensional optic scanner is proposed for the realization of medical infrared thermography system. It has been experimentally proven that the intfrared thermography system composed of the proposed optic system has the temperature resolution of 0.1˚c under the spatial resolution of lmrad, the image matrix size of 256 X 240, and tile imaging time of 4 seconds. 30593 T00401030593 ^x In this paper, MIIS (Medical Image Information System) has been designed and implemented using INGRES RDBMS, which is based on a client/server architecture. The implemented system allows users to register and retrieve patient information, medical images and diagnostic reports. It also provides the function to display these information on workstation windows simultaneously by using the designed menu-driven graphic user interface. The medical image compression/decompression techniques are implemented and integrated into the medical image database system for the efficient data storage and the fast access through the network. 30594 T00401030594 ^x In this paper, computerized BEAM was implemented for the space domain analysis of EEG. Trans-formation from temporal summation to two-dimensional mappings is formed by 4 nearest point inter-polaton method. Methods of representation of BEAM are two. One is dot density method which classify brain electrical potential 9 levels by dot density of gray levels and the other is colour method which classify brain electrical 12 levels by red-green colours. In this BEAM, instantaneous change and average energy distribution over any arbitrary time interval of brain electrical activity could be observed and analyzed easily. In the frequency domain, the distribution of energy spectrum of a special band can easily be distinguished normality and abnormality. 30608 T00401030608 ^x Laboratory information system (LIS) is a key tool to manage laboratory data in clinical pathology. Our department has developed an information system for routine hematology using down-sized computer system. We have used an IBM 486 compatible PC with 16MB main memory, 210 MB hard disk drive, 9 RS-232C port and 24 pin dot printer. The operating system and database management system were SCO UNIX and SCO foxbase, respectively. For program development, we used Xbase language provided by SCO foxbase. The C language was used for interface purpose. To make the system use friendly, pull-down menu was used. The system connected to our hospital information system via application program interface (API), so the information related to patient and request details is automatically transmitted to our computer. Our system interfaced with fwd complete blood count analyzers(Sysmex NE-8000 and Coulter STKS) for unidirectional data tansmission from analyzer to computer. The authors suggests that this system based on down-sized computer could provide a progressive approach to total LIS based on local area network, and the implemented system could serve as a model for other hospital's LIS for routine hematology. 30609 T00401030609 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed a composite that is consisted of calcium phosphate and collagen. To use as the structural matrix of the composite, collagen was purified from human umbilical cord. The obtained collagen was treated by pepsin to remove telopeptides, and finally, the immune-free atelocollagen was produced: The cross linked atelocollagen was highly resistant to the collagenase induced collagenolysis. The cross linked collagen demonstrated an improved tensile strength. 30618 T00401030618 ^x This paper is a study on the design of adptive filter for QRS complex detection. We propose a simple adaptive algorithm to increase capability of noise cancelation in QRS complex detection with two stage adaptive filter. At the first stage, background noise is removed and at the next stage, only spectrum of QRS complex components is passed. Two adaptive filters can afford to keep track of the changes of both noise and QRS complex. Each adaptive filter consists of prediction error filter and FIR filter The impulse response of FIR filter uses coefficients of prediction error filter. The detection rates for 105 and 108 of MIT/BIH data base were 99.3% and 97.4% respectively. 30619 T00401030619 ^x To develop an artificial bone substitute that is gradually degraded and replaced by the regenerated natural bone, the authors designed and produced a composite that is consisted of calcium phosphate and collagen. Human umbilical cord origin pepsin treated type I atelocollagen was used as the structural matrix, by which sintered or non-sintered carbonate apatite was encapsulated to form an inorganic-organic composite. With cross linking atelocollagen by UV ray irradiation, the resistance to both compressive and tensile strength was increased. Collagen degradation by the collagenase induced collagenolysis was also decreased. 30620 T00401030620 ^x We have developed a monoleaflet polymer valve as an inexpensive and viable alternative, especially for short-term use in the ventricular assist device or total artificial heart. The frame and leaflet of the polymer valve were made from polyurethane, To evaluate the hemodynamic performance of the polymer valve a comparative study of flow dynamics past a polymer valve and a St. Jude Medical prosthetic valve under physiological pulsatile flow conditions in vitro was made. Comparisons between the valves were made on the transvalvular pressure drop, regurgitation volume and maximum valve opening area. The polymer valve showed smaller regurgitation volume and transvalvular pressure drop compared to the mechanical valve at higher heart rate. The results showed that the functional characteristics of the polymer valve compared favorably with those of the mechanical valve at higher heart rate. 30621 T00401030621 ^x Explosive evaporative removal process of biological tissue by absorption of a CW laser has been simulated by using gelatin and a multimode Nd:YAG laser. Because the point of maximun temperature of laser-irradiated gelatin exists below the surface due to surface cooling, evaporation at the boiling temperature is made explosively from below the surface. The important parameters of this process are the conduction loss to laser power absorption (defined as the conduction-to-laser power parameter, Nk), the convection heat transfer at the surface to conduction loss (defined as Bi), dimensionless extinction coefficient (defined as Br.), and dimensionless irradiation time (defined as Fo). Dependence of Fo on Nk and Bi has been observed by experiment, and the results have been compared with the numerical results obtained by solving a 2-dimensional conduction equation. Fo and explosion depth (from the surface to the point of maximun temperature) are increased when Nk and Bi are increased.To find out the minimum laser power for explosive evaporative removal process, steady state analysis has been also made. The limit of Nk to induce evaporative removal, which is proportional to the inverse of the laser power, has been obtained. 30622 T00401030622 ^x N1 and N2 gross neural action potentials were measured from the round window of the guinea pig cochlea at the onset of the acoustic stimuli. N1-N2 audiograms were made by means of regulating stimulant intensities in order to produce constant N1-N2 potentials as criteria for different input tone pip frequencies. The lowest threshold was measured with an input tone pip I5 dB SPL in intensity and 12 KHz in frequency when the animal was in normal physiological condition. The procedure of experimental measurements is explained in detail. This experimental approach is very useful for the investigation of the Cochlear function. Both noN1inear and active functions of the Cochlea can be monitored by N1-N2 audiograms. 30623 T00401030623 ^x In electrical impedance tomography(EIT), we use boundary current and voltage measurements toprovide the information about the cross-sectional distribution of electrical impedance or resistivity. One of the major problems in EIT has been the inaccessibility of internal voltage or current data in finding the internal impedance values. We propose a new image reconstruction method using internal current density data measured by NMR. We obtained a two-dimensional current density distribution within a phantom by processing the real and imaginary MR images from a 4.77 NMR machine. We implemented a resistivity mage reconstruction algorithm using the finite element method and sensitivity matrix. We presented computer simulation results of the mage reconstruction algorithm and furture direction of the research. 30624 T00401030624 ^x A new method of digital image analysis technique for discrimination of cancer cell was presented in this paper. The object image was the Thyroid eland cells image that was diagnosed as normal and abnormal (two types of abnormal: follicular neoplastic cell, and papillary neoplastic cell), respectively. By using the proposed region segmentation algorithm, the cells were segmented into nucleus. The 16 feature parameters were used to calculate the features of each nucleus. A9 a consequence of using dominant feature parameters method proposed in this paper, discrimination rate of 91.11% was obtained for Thyroid Gland cells. 30625 T00401030625 ^x An electrical stimulator was designed to induce locomotion for paraplegic patients caused by central nervous system injury. Optimal stimulus parameters, which can minimize muscle fatigue and can achieve effective muscle contraction were determined in slow and fast muscles in Sprague-Dawley rats. Stimulus patterns of our stimulator were designed to simulate electromyographic activity monitored during locomotion of normal subjects. Muscle types of the lower extremity were classified according to their mechanical property of contraction, which are slow muscle (msoleus m.) and fast muscle (medial gastrocneminus m., rectus femoris m., vastus lateralis m.). Optimal parameters of electrical stimulation for slow muscles were 20 Hz, 0.2 ms square pulse. For fast muscle, 40 Hz, 0.3 ms square pulse was optimal to produce repeated contraction. Higher stimulus intensity was required when synergistic muscles were stimulated simultaneously than when they were stimulated individually. Electrical stimulation for each muscle was designed to generate bipedal locomotion, so that individual muscles alternate contraction and relaxation to simulate stance and swing phases. Portable electrical stimulator with 16 channels built in microprocessor was constructed and applied to paraplegic patients due to lumbar cord injury. The electrical stimulator restored partially gait function in paraplegic patients. 30626 T00401030626 ^x Two-Dimensional modelling of the Cochlear biomechanics is presented in this paper. The Laplace partial differential equation which represents the fluid mechanics of the Cochlea has been transformed into two-dimensional electrical transmission line. The procedure of this transformation is explained in detail. The comparison between one and two dimensional models is also presented. This electrical modelling of the basilar membrane (BM) is clearly useful for the next approach to the further. Development of active elements which are essential in the producing of the sharp tuning of the BM. This paper shows that two-dimension model is qualitatively better than one-dimensional model both in amplitude and phase responses of the BM displacement. The present model is only for frequency response. However because the model is electrical, the two-dimensional transmission line model can be extended to time response without any difficult. 30627 T00401030627 ^x A method has been proposed for the fully automatic detection of left ventricular endocardial boundary in 2D short axis echocardiogram using geometric model. The procedure has the following three distinct stages. First, the initial center is estimated by the initial center estimation algorithm which is applied to decimated image. Second, the center estimation algorithm is applied to original image and then best-fit elliptic model estimation is processed. Third, best-fit boundary is detected by the cost function which is based on the best-fit elliptic model. The proposed method shows effective result without manual intervention by a human operator. 30628 T00401030628 ^x The intelligent trajectory control method that controls moving direction and average velocity for a prosthetic arm is proposed by pattern recognition and force estimations using EMG signals. Also, we propose the real time trajectory planning method which generates continuous accelleration paths using 3 stage linear filters to minimize the impact to human body induced by arm motions and to reduce the muscle fatigue. We use combination of MLP and fuzzy filter for pattern recognition to estimate the direction of a muscle and Hogan's method for the force estimation. EMG signals are acquired by using a amputation simulator and 2 dimensional joystick motion. The simulation results of proposed prosthetic arm control system using the EMf signals show that the arm is effectively followed the desired trajectory depended on estimated force and direction of muscle movements. 30638 T00401030638 ^x A new neural network architecture for the recognition of patterns from images is proposed, which is partially based on the results of physiological studies. The proposed network is composed of multi-layers and the nerve cells in each layer are connected by spatial filters which approximate receptive fields in optic nerve fields. In the proposed method, patterns recognition for complicated images is carried out using global features as well as local features such as lines and end-points. A new generating method of matched filers representing global features is proposed in this network. 30659 T00401030659 ^x An implementation scheme of the magnetic nerve stimulator using a switching mode power supply is proposed. By using a switching mode power supply rather than a conventional linear power supply for charging high voltage capacitors, the weight and size of the magnetic nerve stimulator can be considerably reduced. Maximum output voltage of the developed magnetic nerve stimulator using the switching mode power supply is 3,000 volts and switching time is about 100 msec. Experimental results or human nerve stimulations using the developed stimulator are presented. 30768 T00401030768 ^x In this paper, we describe the design methodology and specifications of the developed module-based bedside monitors for patient monitoring. The bedside monitor consists of a main unit and module cases with various parameter modules. The main unit includes a 12.1" TFT color LCD, a main CPU board, and peripherals such as a module controller, Ethernet LAN card, video card, rotate/push button controller, etc. The main unit can connect at maximum three module cases each of which can accommodate up to 7 parameter modules. They include the modules for electrocardiograph, respiration, invasive blood pressure, noninvasive blood pressure, temperature, and SpO2 with Plethysmograph.

• 동양고전연구
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• 제49호
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• pp.73-107
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• 2012

여헌 장현광(1554-1637)은 조선중기를 대표하는 유학자이면서 우주론과 자연학을 가장 체계적으로 저술한 사람이다. 조선조 유학의 지리적인 학맥에서 여헌은 남명 조식과 한강 정구의 학풍을 이어받으면서 풍수와 지지편찬을 계승한 사람으로 자리매김 될 수 있다. 여헌은 주자학에 영향을 받았지만 역학(易學)의 기틀을 견지하였으며, 사변적인 공리공론에 머무르지 않고 실용적 경세학(經世學)으로서의 지리를 인식하였다. 여헌의 지리인식 방법은 역학(易學)의 체계와 구도 상에서 이루어졌다. 여헌은 자연에 대한 인간 본위(本位)의 인식태도를 드러내며, 따라서 인사의 공능이 지리의 조건보다 우선되는 준칙이었다. 여헌에게 산수와 자연은 비덕(比德)의 공부대상이었고, 자연공부 방법은 대상물의 관찰을 통해 생명의 이치를 자득하고, 무심한 경지를 통해 천지의 마음에 이르는 것이었다. 유학의 가르침을 삶의 지침으로 삼았던 여헌에게 있어서 낙토(樂土)는 안분자족(安分自足)함에서 얻어지는 것이었다. 여헌에게 지리인식의 의의는 생활의 실용적인 이익 됨에 목적을 둔 필수적인 지식정보였다. 여헌은 은거지의 생활현장에 자신이 견지한 유학적 우주관과 세계관을 '우주사업'의 일환으로 구현하였다. 이러한 의식과 태도는 주거지의 장소경관과 자연경물(自然景物)을 북극성과 주위 28수의 별자리로 상징화하여 명명하고 우주적 중심 공간으로 구성하는 방식으로 나타났다. 주자의 무이구곡(武夷九曲) 경영에서 비롯된 유학자들의 동천구곡(洞天九曲) 전통은 조선시대에 유행되었지만, 여헌의 장소 구성 체계는 여타의 형태와 방식을 뛰어넘은 우주적 구도의 독창성이 있다. 여헌의 장소 명명 의식에는 선현을 본받고자하는 태도, 자연물의 형용과 성정에 대한 비덕(比德), 그리고 은거(隱居) 의식의 반영이 나타난다. 여헌의 국토관 및 국토이해는 지형개관, 산수이해, 도읍입지, 지역이해, 풍토론, 현실인식의 방식으로 체계적으로 드러나고 중국의 지리적 조건과도 비교되어 파악되었다. 그의 국토인식과 이해방식은, 국토의 유기체적인 인식, 주자학의 자연관이 반영된 기적(氣的)인 국토인식, 산천 인식과 도읍 입지의 풍수적 이해, 지역구분을 통한 비교론적 이해, 인물과 풍속에 대한 풍토론적 이해 방식 등으로 요약할 수 있다. 여헌은 역의 포괄적인 사상체계 범주에서 풍수도 수용하였다. 그가 풍수를 수용할 수 있었던 배경에는 남명과 한강을 계승하는 학풍에서 연유되는 바가 있었다. 여헌은 풍수지식을 활용하여 주거지의 입지를 정하기도 하였고, 고향 연고지의 여러 곳에 대해 풍수적 견지로 언급하기도 했다. 그의 풍수관을 보면, 묘지풍수에서 형세론적 이치는 수긍하고 있지만 장례기일을 미루는 발복 목적의 행위는 비판하였다. 그리고 고을의 풍수에서 숲의 조성을 통한 비보의 필요성을 인정하였다. 이러한 풍수관은 문도(門徒)들의 지지편찬에도 일정하게 반영되었다. 여헌 학풍에서 주목할 만한 지리학적 특징으로 꼽을 수 있는 것이 지지(地誌)의 편찬이다. 이것은 남명과 한강의 치용(治用) 정신과 경세적(經世的) 실천을 계승한 학풍이기도 했다. 여헌은 지지를 중요시하게 생각하면서 문인들에게 편찬을 독려하였다. 고을의 통치자나 지식인으로서 지역의 역사와 옛 일을 잘 알아야하고, 권면하고 징계하는 기준이 마련될 필요가 있다는 것이다. 이러한 여헌의 견해는 이후 문인들의 지지편찬 취지와 내용 구성에 지침이 되었다. 이 연구는 여헌의 지리인식에 관한 사실적인 면모의 정리와 지리적 학풍의 계승 맥락에 관한 고찰에 그친 한계가 있다. 다음에는 여헌 전후 유학자들의 지리인식과 지지편찬 전통이 어떻게 전승되면서 전개 발전되었고 질적으로 변천해 나갔는지를 살피고자 한다. 이러한 연구는 학계에서 공백으로 남아있는 조선 초 중기 유교지식인의 지리학사를 정립하는데 일조할 수 있으리라 믿는다.

• 미술자료
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• 제96권
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• pp.123-154
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• 2019

국립중앙박물관 소장 <인왕선영도(仁旺先塋圖)>(덕수5520)는 그림과 발문(跋文) 열 폭으로 이루어진 병풍으로, 작가는 조중묵(趙重黙)(1820~1894 이후), 주문자는 박경빈(朴景彬)(생몰년 미상), 발문을 쓴 사람은 홍선주(洪善疇)(생몰년 미상), 제작연대는 1868년이다. 국립중앙박물관은 낱장으로 보관되어 온 <인왕선영도>를 병풍으로 복원하고 특별전 '우리 강산을 그리다: 화가의 시선, 조선시대 실경산수화'에서 최초로 공개하였다. <인왕선영도>에는 오늘날 서울특별시 서대문구 홍제동과 홍은동을 아우르는 인왕산 서쪽 실경이 묘사되어있고 원경에는 북한산 연봉이 그려져 있다. 화면 속에는 인왕산(仁旺山), 추모현(追慕峴), 홍재원(弘濟院), 삼각산(三角山), 대남문(大南門), 미륵당(彌勒堂)이라는 지명이 표기되어있다. 이 지역을 나타낸 조선후기 지도와 비교해보면 지형 표현과 지명 표기에 유사성이 있다. 조중묵은 넓은 공간을 포착하기 위해 지도의 지리정보를 숙지하였을 것으로 추정된다. 실경의 현장을 답사한 결과, 조중묵은 각각의 경물을 과장하거나 생략하였고 수평의 화면에 나열식으로 조합하였음을 알 수 있었다. 조중묵은 남종화풍 정형산수에 뛰어났던 화가로, <인왕선영도>의 세부 표현에서 사왕파(四王派) 화풍의 영향을 찾을 수 있다. 19세기 도화서 화원들이 화보를 활용하여 가옥을 그리거나 토파에 호초점을 찍고 당분법(撞粉法)으로 꽃을 나타내는 등 장식적인 화풍을 구사한 경향도 부분적으로 나타난다. <인왕선영도>에는 바위를 짙은 먹으로 쓸어내리듯 붓질한 기법, 산세의 괴량감, 가로로 붓을 대어 단순하게 그린 소나무 등 18세기 정선(鄭敾)(1676~1759)의 개성적 양식도 가미되어있다. 조중묵은 인왕산 실경산수로 유명한 정선의 양식과 권위를 차용한 것으로 추정된다. 그러나 <인왕선영도>는 유기적 공간감과 현장의 인상이 잘 드러나지 않으며, 연폭 화면이라는 매체도 조중묵의 개인 양식과 잘 어울리지 않는다. <인왕선영도>는 발문의 텍스트와 화면의 이미지가 잘 조응하는 작품이다. 발문의 내용을 여섯 단락으로 나누어 보면 ①무덤의 주인공과 이장 경위, ②무덤의 입지와 풍수, ③묘제(墓祭)와 신이(神異)한 응답, ④무덤 관리에 대한 마을 사람들의 협력, ⑤병풍 제작의 동기인 박경빈의 효성과 수묘(守墓), ⑥발문을 쓴 의의로 파악된다. 이 가운데 화면에서 시각적으로 구현하기 용이한 ②의 내용은 화면에 충실하게 재현되었다. <인왕선영도> 제작의 직접적 동기인 ⑤를 보면 주문자 박경빈이 "무덤이 마치 새롭게 단장한 것 같이 눈에 완연하다."라 하여 <인왕선영도>에 만족했음을 알 수 있다. 경물 하나하나를 설명하듯 나열한 구도는 회화미는 떨어지더라도 무덤의 풍수지리를 전달하는 데는 더 적합했을 것으로 추정된다. 현존하는 상당수의 산도(山圖)는 18세기 이후 제작된 목판본 선영도로서, 족보와 문집에 수록된 경우가 많다. 16~17세기의 기록에서는 족자 선영도를 첨배(瞻拜)의 대상으로 삼은 사례를 찾을 수 있다. 선영도 첨배는 현실적으로 수묘(守墓)가 곤란할 때 이를 대신할 수 있는 의례로 인정되었다. 한효원(韓效元)(1468~1534), 조실구(曺實久)(1591~1658) 등이 선영도를 제작한 후 당대의 명사에게 서문을 요청하고 효심을 과시한 사례는 <인왕선영도>의 선구가 된 것으로 추정된다. <석정처사유거도(石亭處士幽居圖)>(개인 소장), <화개현구장도(花開縣舊莊圖)>(국립중앙박물관) 등은 선영도는 아니지만 계회도 형식의 족자이고 풍수를 도해했다는 점에서 17세기 선영도의 모습을 유추할 수 있는 자료가 된다. <인왕선영도>는 첨배라는 측면에서 초상화와도 의미가 비슷했다. 발문의 "부친의 기침소리를 직접 접하는 듯하고, 그 태도와 몸가짐을 눈으로 보는 듯하다."는 표현과 부친의 초상에 조석 문안을 올린 서효숙 고사에서 그 단초를 찾을 수 있다. 박경빈이 일반적인 선영도 형식이었던 족자나 목판화 대신 연폭 병풍의 실경산수화를 주문한 의도는 분명히 알기 어렵다. 19세기에는 민간에서도 사례(四禮) 의식에 다수의 병풍을 배설(排設)하였는데, 의례의 성격에 따라 그림의 주제를 반드시 구분하여 사용한 것은 아니었다. <인왕선영도> 또한 여러 의례에 두루 배설하거나 장식 병풍으로도 사용하기 위해서 선영 그림이라는 주제를 실경산수화 이미지 아래에 가렸을 가능성이 있다. 특히 <인왕선영도>의 핵심 소재인 무덤 봉분이 모호하게 처리된 것은 사산금표(四山禁標)의 금제 위반을 숨기기 위함일 가능성이 있다. <인왕선영도>에 묘사된 인왕산 서쪽 산기슭은 분묘 조성 금지구역이었다. 1832년에 금표 내에 몰래 쓴 묘를 적발하여 즉시 파내고 관련자를 엄히 처벌한 사례로 볼 때, 19세기 중엽까지도 사산금표 내의 분묘 금제는 효력을 발휘하고 있었던 것으로 추정된다. <인왕선영도>의 발문에는 장지를 얻기 위해 쏟은 정성이 상세하게 쓰여 있다. 장지조성에 마을사람들의 협조와 묵인이 필요했던 것은 금표 구역 내에 묘지를 조성하는 것이 부담스러운 일이었기 때문으로 볼 수 있다. <인왕선영도>와 비교 가능한 동시대 연폭 병풍의 실경산수화로 이한철(李漢喆)(1808~1880)이 그린 <석파정도(石坡亭圖)>(미국 로스앤젤레스카운티미술관)를 들 수 있다. <석파정도> 제작시기를 전후한 1861년에 이한철과 조중묵은 철종어진도사에 함께 참여하였으므로 조중묵이 이한철의 <석파정도> 제작 과정을 보았을 가능성은 상당히 높다. 조중묵이 몇 년 후 <인왕선영도>를 주문받았을 때 <석파정도>의 인상적인 연폭 실경산수를 본 경험이 반영되었을 가능성이 있다. 두 작품의 화풍 차이는 주문자의 취향과 제작 목적의 차이에서 비롯된 것으로 추정된다. <인왕선영도>는 실경산수화와 선영도의 중층적인 구조를 가지고 있어서 관람자의 지식수준과 주문자와의 친분, 관람에 들이는 시간에 따라 천차만별의 의미로 수용되었을 것이다. <인왕선영도>의 발문에는 무덤 주인의 이름과 자호, 본관이 일체 작성되지 않은 채 '박공(朴公)'이라고만 표기되어 있다. 주문자인 박경빈의 인적 사항도 파악할 수 없었으나 다만 관직에 나아가지 못한 가계를 미루어 볼 때 재력이 있음에도 지배계층으로 올라설 수 없는 신분적 한계를 지니고 있었음은 짐작할 수 있다. 발문을 쓴 홍선주 또한 사대부로 보기 어려우며, 『승정원일기』 기록에 나타나는 경아전 서리일 가능성이 있다. 박경빈은 상류 계층에 진입하고 싶은 욕망으로 보수적인 가치인 효(孝)를 강조하여 부친의 무덤을 명당으로 이전하고 <인왕선영도>를 제작하였을 것으로 추정된다. 그러나 <인왕선영도>는 금제위반 적발에 대한 우려, 병풍의 다목적성 등의 이유로 본래의 제작의도를 뚜렷하게 드러내지 못하고 모순적인 이미지가 되었다. 병풍이 제작된 지 47년 만에 각 폭이 분리된 채 미술상을 통해 이왕가미술관 소장품이 된 상황을 보더라도, 박경빈이 <인왕선영도>에서 꿈꾸었던 명당 발복과 가문의 신분상승은 이루어지지 못했던 것으로 생각된다.