• 조형예술학연구
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• 제10권
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• pp.5-50
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• 2006

인간의 신체는 단순한 육체적 몸을 넘어서 온갖 삶의 역사를 담은 상징체이다. 특히 예술 표현을 위해 신체를 사용하는 수많은 예들을 통해 볼 때, 즉 예술의 대상으로서 신체를 포착하거나, 자신의 생각을 전달하기 위해 신체 행위를 드러내거나 간에 시간과 장소를 포함한 삶의 지시체와 같은 역할을 해왔다. 이러한 신체에 대한 입장은 사실 그리 오래된 관점이 아니다. 1960년대 이래 이성과 사유의 힘을 중심화 하던 모더니즘의 사유 패러다임이 쇠퇴하고 감성과 감각의 중요성이 부각되면서 오랜 동안 정신의 시녀였던 신체가 탈분화적 관점에서 하나의 실체로서 주목하게 되면서부터이다. 이는 현대미술의 흐름에서 1940년대 이후 액션페인팅(Action Painting)에서부터 신체행위의 중요성이 제기되고 1960년대 액셔니즘(Actionism)과 플럭서스(Fluxus)의 빈번한 퍼포먼스(Performance)에서 신체는 표현의 중요한 매체가 되었다. 이브 클랭(Yves Kline)의 신체와 그 흔적에 의한 개념적 작업에서 시작되어, 1970년대 본격화된 바디아트(Body Art)에서 신체는 보다 확고한 예술의 매체로 부각된다. 이후 1980년대 만개한 페미니즘(Feminism)과 1990년대 파편화되고 해체된 신체미술의 경향들로 이어졌다. 이러한 흐름에서 볼 때 신체는 지시적 의미의 단계를 넘어서 개인의 정체성으로부터 세계상을 함축하여 드러낼 수 있는 단서로 간주된다. 특히 1980년대 이후 페미니즘(Feminism)적 경향의 키키 스미스(Kiki Smith)는 신체의 확장된 의미를 제시해주는 대표적 작가들로 그들의 작품을 연구 대상으로 하게 되었다. 이러한 배경 아래 키키스미스의 작품 세계를 고찰하기 위해, 신체를 통해 의미의 지평이 열리는 객관적 방법을 모색한 결과, 기호학과 신체론에 대한 고찰이 필요하다는 사실을 인식하게 되었다. 즉 신체를 객관화하여 가장 기초적인 수준에서 표현적인 부분과 내용적인 부분을 구조적으로 나누어 그 관계에 의해 의미가 발생하게 되는 과정을 기호와 텍스트의 개념에서 시작하였다. 나아가 이 표현면과 내용면의 구조적인 결합방식을 그레마스(A. J. Greimas)의 구조의미론에서 다룸으로써 의미의 확장을 위한 토대론적 작업을 구축하였다. 한편, 신체론에서는 세계와의 관계항으로서 신체를 조망하게 해준 메를로-퐁티(Maurice Merleau-Ponty)의 현상학(Phenomenology)과 애브젝션(abjection)의 개념을 통해 해체와 파편의 신체를 전달하게 해준 줄리아 크리스테바(Julia Kristeva)의 논의가 구조의미론적 분석을 해석으로 확장시키는 데 중요한 기여를 하였다. 키키 스미스는 1980년대 중반 죽음에 대한 서사에서 시작된 이중화와 파편화의 신체로부터 상처받을 수 있는 신체의 비천함이 구체적으로 드러난 1990년대 그리고 상처의 치유에 이르는 종교와 신화로 이어지는 2000년대 이후의 과정을 보여주었다.

• 벤처창업연구
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• 제15권1호
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• pp.285-301
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• 2020

국내의 고령화 문제를 인구학적 관점에서 바라보면 전체 인구수의 문제가 아니라 인구구조가 문제이다. 국내에서 규모가 가장 큰 인구집단은 베이비부머, 포스트 베이비부머 세대이다. 베이비부머 세대는 1955~1963년생으로 현재 인구는 700만 1,333명이며, 전체인구의 약 13.6%(2015년 기준)를 차지한다. 포스트 베이비부머 세대는 1964~1974년생으로 총인구는 956만 7,171명으로 총인구의 18.8%에 해당한다. 베이비부머 세대와 포스트 베이비부머 세대(총 인구대비 32.4%)가 은퇴를 시작하였고, 조만간 은퇴할 예정이다. 의학기술의 발달로 평균 수명이 지속해서 증가하고 있으며, 신생아의 출산율 저하, 생산인구의 감소는 국내의 경제를 어둡게 하고 있다. 이런 사회적 문제 인식과 문제 해결안으로 본 연구는 액티브 시니어들의 다양한 경력기반에 기초한 경력지향성과 창업 교육 만족도가 창업 의지, 창업 준비 행동에 미치는 영향 관계를 살펴보고, 또한 이들 간의 관계를 규명함으로써 액티브 시니어의 다양성에 대한 맞춤형 창업 교육중요성을 제안하고 시니어 창업정책 설계 및 자금지원, 창업 교육의 바람직한 방향을 제시하고자 한다. 이를 위해 이론적 배경을 바탕으로 액티브 시니어, 경력 지향성, 창업 교육 만족도, 창업 의지, 창업 준비 행동의 5개 요소의 개념을 정의하고, 특히 핵심이 되는 액티브 시니어의 개념적 정의를 베이비부머 세대인 50대, 60대로 비즈니스의 핵심소비 주체나 복지혜택의 수급대상자로 보는 것이 일반적이지만, 본 연구에서는 국내의 창업 시장에서의 40대, 50대, 60대 순으로 연령별 창업기업 수가 높은 것을 반영하여 액티브 시니어 창업가를 예비시니어(Pre Senior)를 포함한 경력, 경제력, 소비력을 갖추고 활발한 활동과 건강한 삶을 지향하는 40대에서 60대까지 세대를 액티브 시니어로 정의하였다. 가설검증 결과로 가설 1과 가설 5에서 경력 지향성은 창업 의지와 창업 준비 행동 영향을 미치는 것으로 검증되었다. 가설 3에서 창업 의지는 창업 준비 행동 간에 영향을 미치는 것으로 검증되었다. 가설 4에서 창업 교육 만족도는 창업 준비 행동에 영향을 미치는 것으로 검증되었다. 그러나 가설 2에서 창업 교육 만족도는 창업 의지에 영향을 미치지 않는 것으로 나타났다. 이와 같은 결과는 창업교육 만족도가 창업 의지에 직접적인 효과는 미치지 못하고 개인적인 경력 지향성의 영향을 통해 창업 의지를 높이는 것으로 나타났다. 본 연구 결과를 활용하여 액티브시니어 창업정책 수립 방향 수립에 의미를 제공한다.

• 지능정보연구
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• 제18권3호
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• pp.185-202
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• 2012

오늘날 정보사회에서는 정보에 대한 가치를 인식하고, 이를 위한 정보의 활용과 수집이 중요해지고 있다. 얼굴 표정은 그림 하나가 수천개의 단어를 표현할 수 있듯이 수천 개의 정보를 지니고 있다. 이에 주목하여 최근 얼굴 표정을 통해 사람의 감정을 판단하여 지능형 서비스를 제공하기 위한 시도가 MIT Media Lab을 필두로 활발하게 이루어지고 있다. 전통적으로 기존 연구에서는 인공신경망, 중회귀분석 등의 기법을 통해 사람의 감정을 판단하는 연구가 이루어져 왔다. 하지만 중회귀모형은 예측 정확도가 떨어지고, 인공신경망은 성능은 뛰어나지만 기법 자체가 지닌 과적합화 문제로 인해 한계를 지닌다. 본 연구는 사람들의 자극에 대한 반응으로서 나타나는 얼굴 표정을 통해 감정을 추론해내는 지능형 모형을 개발하는 것을 목표로 한다. 기존 얼굴 표정을 통한 지능형 감정판단모형을 개선하기 위하여, Support Vector Regression(이하 SVR) 기법을 적용하는 새로운 모형을 제시한다. SVR은 기존 Support Vector Machine이 가진 뛰어난 예측 능력을 바탕으로, 회귀문제 영역을 해결하기 위해 확장된 것이다. 본 연구의 제안 모형의 목적은 사람의 얼굴 표정으로부터 쾌/불쾌 수준 그리고 몰입도를 판단할 수 있도록 설계되는 것이다. 모형 구축을 위해 사람들에게 적절한 자극영상을 제공했을 때 나타나는 얼굴 반응들을 수집했고, 이를 기반으로 얼굴 특징점을 도출 및 보정하였다. 이후 전처리 과정을 통해 통계적 유의변수를 추출 후 학습용과 검증용 데이터로 구분하여 SVR 모형을 통해 학습시키고, 평가되도록 하였다. 다수의 일반인들을 대상으로 수집된 실제 데이터셋을 기반으로 제안모형을 적용해 본 결과, 매우 우수한 예측 정확도를 보임을 확인할 수 있었다. 아울러, 중회귀분석이나 인공신경망 기법과 비교했을 때에도 본 연구에서 제안한 SVR 모형이 쾌/불쾌 수준 및 몰입도 모두에서 더 우수한 예측성과를 보임을 확인할 수 있었다. 이는 얼굴 표정에 기반한 감정판단모형으로서 SVR이 상당히 효과적인 수단이 될 수 있다는 점을 알 수 있었다.

• Tuberculosis and Respiratory Diseases
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• 제44권6호
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• pp.1296-1307
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• 1997

연구배경 : Erdosteine은 만성 기관지염 급성 악화시는 물론 만성 폐색성 기관지염 치료제로 개발된 Thiol 유도체로서 점액조절작용, 항산화작용이 있으며, 특히 위장관 부작용이 거의 없다. 본 연구에서는 현재 유효성 및 안전성이 입증되어 임상에서 많이 처방되고 있는 Ambroxol과의 비교임상연구를 통해 급성 및 만성 기관지염 환자에서 Erdosteine의 임상적 유용성을 알아보고자 하였다. 방 법 : 본 연구는 무작위 이중맹검 비교시험으로서 전향적 연구방법으로 수행되었다. 급 만성 기관지염으로 다량의 객담배출 혹은 객담배출곤란을 주증상으로 하는 80명을 무작위로 할당하여 Erdosteine 투여군에는 1일 2회, 1회 300mg, Ambroxol 투여군에는 1일 2회, 1회 30mg을 총 7일간 투여하였다. 1차 효과평가기준으로는 객담배출횟수, 객담량, 객담배출용이도, 객담점도, 기침정도, 호흡곤란을 포함한 자각증상이 평가되었고, 2차 효과평가기준으로는 동맥혈가스검사, 폐기능검사가 평가되었다. 안전성은 부작용과 임상병리검사로 평가하였다. 총 80명의 환자 중 61명(Erdosteine군 : 31명, Ambroxol군 : 30명)이 본 연구를 종료하였고 19명은 중도 탈락되었다. 결과의 분석은 paired t-test, ANOVA test, multivariate t2-test, Repeated measures analysis of covariance, two sample t-test, Loglinear-Logit model analysis, Fisher's exact test를 이 용하여 유의성을 검정하였다. 결 과 : 1) 두 군간의 환자배정에 있어서 인구학적, 임상적 특징은 차이가 없었다. 2) 동맥혈가스검사, 폐기능검사에서는 두 군간의 차이는 없었고, 자각증상에서는 Erdosteine군은 객담 배출횟수, 객담량, 객담배출용이도, 객담점도, 기침정도, 호흡곤란에서, Ambroxol군은 객담배출횟수, 객담량, 객담배출용이도, 객담점도, 기침정도에서 유의하게 호전을 보였다. 통계적으로 유의하지 않았으나 Erdosteine군이 Ambroxol군에 비해 더 유의하게 호전되는 경향을 보였다($\alpha$=0.05). 3) 혈액학적검사, 혈액화학적검사 및 소변검사에서는 각 군 모두 임상적으로 의미있는 변화는 없었고 두 군간의 차이도 없었으며, 자각증상에서는 Ambroxol군에서만 4명이 연구 종료시까지 부작용이 소실되지 않았고 2명은 연구를 중단하였으나 두 군간의 차이는 없었다. 4) 각 약제의 최종효과평가에서 Erdosteine군은 31명 중 아주좋은효과 11명, 좋은효과 12명, 경도효과 6명, 무효과 2명, 악화 0명이었고 Ambroxol군은 30명 중 아주좋은효과 6명, 좋은효과 14명, 경도 효과 5명, 무효과 4명, 악화 1명이었으며 Erdosteine군이 Ambroxol군에 비해 증상이 개선될 확률이 약 2.5배만큼 높았다 (p<0.05). 결 론 : Erdosteine은 급성 및 만성 기관지염 환자의 치료에 있어 그 효과와 안전성에 있어서 우수한 약물이라고 할 수 있다.

• 한국전통조경학회지
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• 제30권1호
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• pp.90-102
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• 2012

본 연구의 대상인 허주부군산수유첩(虛舟府君山水遺帖)은 고서벽(古書癖), 탄금벽(彈琴癖), 화훼벽(花卉癖), 서화벽(書畵癖) 그리고 주유벽(舟遊癖) 등 오벽(五癖)을 가진 인물인 고성 이씨 11대 종손 허주(虛舟) 이종악(李宗岳: 1726-1773)이 1763년 4월 4일부터 8일까지 5일간 18명의 친인척들과 임청각에서 시작해 양정(羊汀), 칠탄(七灘), 사빈서원(泗濱書院), 선창(船倉), 낙연(落淵), 선찰(仙刹)과 선유정(仙遊亭), 몽선각(夢仙閣), 백운정(白雲亭)과 내앞마을(川前里), 이호(伊湖), 선어대(鮮魚帶)를 거쳐 귀착지인 반구정(伴鷗亭)에 이르기까지 '안동팔경' 또는 '임하구곡'으로 불리우는 반변천(半邊川) 주변의 절경지를 선유(船遊)하며 남긴 십이폭의 화첩이다. 산수유첩에 표현된 장소 및 경물 그리고 식물요소를 중심으로 과거와 현재의 경관 및 풍물에 대한 물리 생태적, 시각 미학적 변화에 주목한 연구 결과는 다음과 같다. 산수유첩의 표현된 맑은 강물과 하얀 백사장 그리고 기암절벽을 배경으로 이루어진 시회(詩會), 거문고 소리에 귀 기울이는 선상(船上) 풍류는 조선시대 상류층의 선유(船遊) 놀이문화를 보여주는 좋은 사례다. 아쉽게도 임하댐과 안동댐 건설로 초래된 심대한 시각적 변화와 생태적 변동으로 인해 양정과범(羊汀過帆), 칠탄후선(七灘候船), 사수범주(泗水泛舟), 선창계람(船倉繫纜), 낙연모색(落淵莫色), 망천귀도(輞川歸棹), 이호정도(伊湖停棹)의 경관상은 본래의 정취를 전혀 느낄 수 없으며, 단지 화폭에 묘사된 그림을 통해 당시의 풍광과 정취를 가늠할 수 있다. 허주부군산수유첩의 제1도(동호해람(東湖解纜))와 제11도(선어반조(鮮魚返照))에는 회화나무나 시무나무 또는 느릅나무 등 낙엽활엽교목으로 판단되는 수목들이 표현되었고, 제9도(운정풍범(雲亭風帆))의 '개호(開湖)'라 불리는 솔숲을 운천공이 1617년에 소나무를 식재해 형성한 숲이다. 그 외 승경도에서는 자연지형과 조화를 이룬 소나무 등의 상록침엽수와 정자나 건물 주변에 식재된 낙엽교목류가 표현되고 있다. 허주부군산수유첩과 신암의 동유십소기(東遊十小記)의 비교 고찰한 결과, 임하구곡의 일곡의 백운정으로부터, 이곡 임천과 임천서원, 사곡 사수의 사빈서원, 오곡 송석, 육곡 선창의 수석, 칠곡 낙연현류, 팔곡 선찰사와 선유정, 구곡 표옹 유허로 재차 확인되었으며, 모호했던 삼곡은 마천과 칠탄으로 추정된다. 허주부군산수유첩은 조선 후기의 낙동강 최대 지류인 반변천 연안의 경관이 절묘하게 표현되어 있으며, 댐 건설로 현재는 찾아보기 힘든 선인들의 선유 풍류와 경관요소들을 음미할 수 있는 도형사료로써의 가치를 확인한 것이 본 연구의 작은 성과로 판단된다.

• 헤리티지:역사와 과학
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• 제55권4호
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• pp.212-240
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• 2022

문헌연구와 고서화 도해 그리고 현장연구를 통해 중국 강희제가 읊은 「승덕 피서산장 삼십육경(承德 避暑山莊 三十六景)」(이하 「강희36경」) 제영시(題詠詩)의 분석과 해석(解釋)을 통해 「강희36경」에 담긴 경관 특성과 함의를 추적한 결론은 다음과 같다. 「강희36경」은 팔경시의 외연(外緣)을 연장한 것으로, 기존의 「팔경시」나 <팔경도>와 비교해 볼 때 '대상 중심'이 아닌 '시점(시점장) 중심'의 경관 형상화가 두드러진다. 그 결과 전(殿)과 정(亭) 등 9개 유형의 건축물을 시점으로 구조화된 경관 틀짜임을 지향하였다. 특히 호박구에 입지한 여의주는 중국의 저명한 원림과 산수시 및 산수화의 정수(精髓)만을 모은 집금식(集錦式) 배치와 구성을 통해 원중원(園中園)의 성격을 부여하였다. 표제어 분석 결과, 제영시에 등장하는 경관요소는 수체류(水體類) 14개 경(38.9%), 지형지모(地形地貌)와 관련된 산체류(山體類) 13개 경(36.1%)으로 이들 요소의 비중이 월등히 높았으며, 건축·토목류는 3개 경(8.3%), 천공류(天空類)는 2개 경(5.6%)으로 분류되었다. 제영시에서는 기후풍토요소에 대한 경관어휘(景觀語彙)의 언급이 압도적으로 두드러졌는데 특히 표제어에서는 구름(雲)과 바람(風)이 대표적 경관어휘로 드러났다. 뿐만 아니라 운(雲)·수(水)·천(泉)·청(清)·파(波)·류(流)·풍(風) 그리고 무서(無暑) 등과 같은 '청량(淸涼)'을 상징하는 시어가 높은 빈도로 출현하고 있음은 우연이 아니며, 이는 열하(熱河)의 지역성 및 피서산장의 장소성과 강하게 밀착되어 있음을 보여준다. 계절 배경이 확인된 23개 경중에서 하경(夏景)이 과반수로 비중 있게 묘사되는 점이나 피서산장 일원의 청랭성(淸冷性)으로 집약되는 기후풍토요소가 입체적이고 다의적으로 묘사되고 있음은 경관 주체인 강희제의 원림 향유 시기와 관련 깊은 것으로 보인다. 더불어 제영시에 등장하는 다수의 동식물 경관은 휴양은 물론 관상과 수렵의 공간 속성과도 동일한 맥락으로 보인다. 한편 제영시에는 고시(古詩), 전고(典故), 고화(古畫) 등을 통해 명인(名人)과 명저(名著)를 인용한 경이 33개(91.7%) 경에 이를 정도로 상고성(尙古性)의 경향이 두드러진다. 이는 경관 주체인 강희제의 중국 전통문화에 대한 이해와 자부심을 바탕으로 한 것으로 추론된다. 「강희36경」에는 가경(佳景)에 의탁(依託)된 심정에 대한 서경적 묘사뿐만 아니라 근정애민(勤政愛民) 정신, 자강불식(自强不息)과 권학(勸學) 정신 그리고 모친에 대한 공경(恭敬)과 효(孝)의 정서가 깊이 내포되고 있다. 궁극적으로 「강희36경」은 피서산장의 실경(實景)은 물론 의경적(意境的) 차원을 다층적이고 입체적으로 보여줌으로써, 황가원림의 품격과 문인의 정서를 바탕으로 한 황제로서의 기개(氣槪)를 드러내고자 한 제황적(帝皇的) 집경(集景)이라 할 만하다.

• Asia Marketing Journal
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• 제13권2호
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• pp.99-130
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• 2011

최근, 제품 디자인의 차별화 방법 중 하나로 제품에 명화(名畵)를 차용하는 이른바 '명화 마케팅(masterpiece marketing)'이 각광받고 있다. 본 연구는 시장에서 널리 사용되고 있는 명화 마케팅에 체계적이고 과학적인 방법을 적용하여, 명화에서 유발되는 감정이 제품 속성 평가에 영향을 미치는 중요한 요소임을 밝혀내고자 하였다. 본 연구는 명화가 가지는 본질적 기능인 감상자의 정서 유발에 초점을 맞추어, 차용된 명화에서 유발되는 감정(affect)이 해당 제품 평가에 어떠한 영향을 미치는 가에 대한 가설을 세웠다. 보다 구체적으로 기존 감정 연구에서 제시된 감정의 두 축, 쾌(pleasure), 환기(arousal)의 수준에서 차이가 나는 명화가 각각 제품에 차용되었을 경우, 소비자의 제품 평가에 어떠한 영향을 미치는 가에 대해 제품의 유형(실용재/ 쾌락재)과 각 속성(실용적 속성/ 쾌락적 속성)에 대한 평가의 차이를 통해 살펴보았다. 분석 결과, 긍정 감정을 야기하는 명화에 대한 선호도가 부정감정을 야기하는 명화에 대한 선호도보다 높았으며, 제품 유형에 관계없이 긍정감정을 유발하는 명화를 제품에 차용하였을 경우 부정감정을 유발하는 명화를 제품에 차용했을 때보다 제품태도가 더 높게 나타났다. 또한 이를 바탕으로 명화가 유발하는 감정이 제품태도에 미치는 영향은 명화에 대한 선호도에 의해 매개됨을 밝혀냈다. 감정의 또 다른 한 축인 환기 수준이 높은 명화를 실용재인 우유에 차용했을 경우, 쾌락적 속성에 대한 평가가 높아진 반면, 환기 수준이 낮은 명화를 차용했을 경우에는 실용적 속성에 대한 평가가 높아졌다. 그러나 쾌락재인 초콜릿의 경우 이러한 차이가 발견되지 않아 제품에 차용된 명화에서 유발되는 감정 수준(환기 수준)이 제품 유형에 따라 각각 다른 영향을 미치고 있음을 확인할 수 있었다. 본 연구는 다음과 같은 점에서 의의가 있다. 첫째, 시장에서 널리 사용되고 있는 명화 마케팅에 체계적이고 과학적인 방법을 적용하여, 명화에서 유발되는 감정이 제품 속성 평가에 영향을 미치는 중요한 요소임을 밝혀내었다. 둘째, 긍정/부정 감정에 초점을 두어 진행되었던 기존 연구에서 더 나아가 감정의 또 다른 축인 환기가 제품 속성평가에 차별적인 영향을 미칠 수 있음을 확인하였다.

• 한국유통학회지:유통연구
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• 제15권3호
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• pp.71-110
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• 2010

본 연구에서는 항공권 예약 발권 웹사이트의 서비스 품질을 측정 뿐만 아니라 서비스 회복도 측정하고자 하였다. 또한 서비스 품질과 서비스 회복이 고객만족 및 충성의도에 미치는 영향관계를 실증하고자 하였다. 온라인 서비스 품질과 온라인 서비스 회복의 측정을 위해 Parasuraman, Zeithaml, & Malhotra(2005)가 개발한 E-S-QUAL과 E-RecS-QUAL을 사용했으며, 했다. E-S-QUAL은 온라인 서비스 품질을 측정하는 도구로써, 효율성, 시스템 이용가능성, 이행성, 프라이버시의 4개 차원 22개 항목으로 구성된다. E-RecS-QUAL은 온라인 서비스 회복을 측정하는 도구로써, 반응, 보상, 접촉의 3개 차원 11개 항목으로 구성된다. 실증분석을 위한 설문조사는 항공사나 여행사의 웹사이트를 통해 국내 외 항공권을 구입해 본 경험이 있는 소비자를 대상으로 실시하였는데, 총 400부가 회수되었고, 이 중 342부를 최종분석에 사용하였다. 실증분석을 위해 AMOS 7.0과 SPSS 15.0을 사용하였다. 먼저, SPSS 15.0을 사용하여, 요인점수를 이용한 회귀분석으로 가설검증을 한 결과, <가설 I-1, 2, 3, 4, II-1, 2, 3, III-1, IV-1>이 전부 채택되었다. 온라인 서비스 품질과 온라인 서비스 회복의 각 차원은 모두 전반적인 서비스 품질에 유의한 영향을 보였고, 전반적인 서비스 품질은 고객만족에 유의한 영향을 미쳤다. 마지막으로 고객만족 역시 충성의도에 유의한 영향을 미치는 것으로 확인되었다. 한편 AMOS 7.0을 사용하여 모형 분석을 하였는데, 모형의 적합도는 가설검증을 하기에 합당한 수치가 나왔다. 이를 토대로 가설검증을 한 결과, <가설 I-1, 3, II-1, 3, III-1, IV-1>은 채택되었고, <가설 I-2, 4, II-2>는 기각되었다. 이 결과는 Parasuraman et al.(2005)이 주장한 것처럼 E-S-QUAL을 나타내는 데는 요인점수를 이용한 회귀분석이 더 적합하다는 것을 보여주는 것이라고 판단된다. 이를 토대로 본 연구의 시사점을 정리하였다.

• 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)
• /
• 한국우주과학회 1993년도 한국우주과학회보 제2권2호
• /
• pp.17-17
• /
• 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.