• 한국학교보건학회지
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• 제12권2호
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• pp.207-215
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• 1999

The objectives of this study are to explain the use of media materials in school health education with other related factors in elementary, middle, and high schools in Korea. The data were collected by questionnaires from June to September in 1998. The number of subjects were 294 school nurses. The PC-SAS program was used for statistical analysis such as percent distribution, chi-squared test, spearman correlation test, and logistic regression. The use of media materials in health education has become extremely common. Unfortunately, much of the early materials were of poor production quality, reflected low levels of interest, and generally did little to enhance health education programming. A recent trend in media materials is a move away from the fact filled production to a more affective, process-oriented approach. There is an obvious need for health educators to use high-quality, polished productions in order to counteract the same levels of quality used by commercial agencies that often promote "unhealthy" lifestyles. Health educators need to be aware of the advantages and disadvantages of the various forms of media. Selecting media materials should be based on more than cost, availability, and personal preference. Selection should be based on the goal of achieving behavioral objectives formulated before the review process begins. The decision to use no media materials rather than something of dubious quality usually be the right decision. Poor-quality, outdated, or boring materials will usually have a detrimental effect on the presentation. Media materials should be viewed as vehicles to enhance learning, not products that will stand in isolation. Process of materials is an essential part of the educational process. The major results were as follows : 1. The elementary schools used the materials more frequently. But the production rate of media materials was not enough. The budget was too small for a wide use of media materials in school health education. These findings suggest that all schools have to increase the budget of health education programs. 2. Computers offer an incredibly diverse set of possibilities for use in health education, ranging from complicated statistical analysis to elementary-school-level health education games. But the use rate of this material was not high. The development of related software is essential. Health educators would be well advised to develop a basic operating knowledge of media equipment. 3. In this study, the most effective materials were films in elementary school and videotapes in middle and high school. Film tends to be a more emotive medium than videotape. The difficulties of media selection involved the small amount of extant educational materials. Media selection is a multifaceted process and should be based on a combination of sound principles. 4. The review of material use following student levels showed that the more the contents were various, the more the use rate was high. 5. Health education videotapes and overhead projectors proved the most plentiful and widest media tools. The information depicted was more likely to be current. As a means to display both text and graphic information, this instructional medium has proven to be both effective and enduring. 6. An analysis of how effective the quality of school nurse and school use of media materials shows a result that is not complete (p=0.1113). But, the budget of health education is a significant variable. The increase of the budget therefore is essential to effective use of media materials. From these results it is recommended that various media materials be developed and be wide used.

• 핵의학기술
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• 제12권1호
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• pp.91-98
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• 2008

산업의 발달과 기술개발을 통해 양적이나 질적으로 많은 성장을 해오고 있다. 특히 연구 개발 또는 진단용 방사성동위원소 사용 및 생산은 국내 사이클로트론 보급이 확대됨에 따라 그 성장추세가 급격하게 이루어지고 있다. 방사성동위원소를 취급하는 기관으로는 병원, 발전소, 연구소, 교육기관 등이며, 이러한 시설은 급기보다 배기시설을 중요시 하는데, 이러한 시설에서 발생되는 방사능 오염물질이 외부로 방출될 경우 주변 환경을 오염시키기 때문에 원자력법에 의하여 배기되는 공기 중 방사능 농도를 규제하고 있다. 본 과제에서는 현재 국내병원들의 배기관리 실태파악 및 현황을 설명하고 이러한 운영현황이 규제기관인 한국원자력 안전기술원의 원자력법에서 규정한 배출관리 기준을 만족하는지에 대해 알아보고 개선과제를 도출하여 기준안을 마련하여야 할 것이다. 필터의 정의 및 pre filter, hepa filter, charcol filter의 특징과 구조에 대해 알아보고 RI filter 교체 절차와 주의할 사항을 알아보았다. 규제기관인 한국원자력안전기술원의 원자력법에서 규정한 배출관리 기준 및 RI filter의 교체주기의 기준을 제시하겠고 국내 의료기관의 RI배기관리 실태파악 및 현황을 설명하고 이러한 운영현황의 장단점을 비교분석하여 기준안을 제시하였다. 분당서울대학교병원이 도입한 RCMS 기능 및 타 의료기관에서 사용 중에 있는 디지털 차압 게이지를 PC와 연동하여 구동하는 시스템을 제시하였다. RI를 사용하는 의료기관들의 의료시스템은 21세기를 맞아 눈부시게 개혁되고 있다. 특히 방사선안전관리 분야도 국제적 변화에 발맞추어 세분화, 고도화, 첨단화로 급격한 기술변화에 거듭나고 있다. 그러나 현재의 배기관리 시스템은 과거의 형태에서 변화를 찾아 볼 수 없다. 우선 우리나라의 발전된 정보통신 기술을 적극 활용하여 RCMS 및 디지털 차압게이지를 이용한 시스템 기능을 강화하여 RI filter의 교체주기와 배출관리 규정의 두 마리 토끼를 잡아야 할 것이다. 본 과제에서는 지금까지 배기관리 시스템을 현장에서 사용하는 방사선안전관리자로서 현재의 문제점 및 개선안에 대한 개인적인 제안사항을 제시하였다. 이러한 제안은 보다 심도 깊은 검토과정을 거쳐추진을 할 필요가 있다고 판단된다.

• 영재교육연구
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• 제11권2호
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• pp.127-150
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• 2001

다가오는 21세기에는 기존에 없던 새로운 것을 생각해 내어 문제를 해결해내는 창의적인 문제해결력이 요구되는 지식기반 사회이다. 이러한 요구에 창의적 문제 해결력을 신장시킬 수 있는 창의성 프로그램이 절실히 요구된다. 창의적인 문제해결력이란 문제의 해결을 필요로 하는 상황에서 기존의 아이디어를 좀더 발전시키거나 지금가지 없었던 새로운 아이디어를 생각해 내어 문제를 해결 해 내는 능력이다. 유아의 경우 창의성 교육은 특히 중요하다. 왜냐하면, 열린 사고. 참신한 사고의 싹은 어려서부터 자라고 틀지워 지기 때문이다. 이미 창의성 교육은 사회에서 또 학교 및 사회교육에서, 현실적으로 당연하고 필연적이며 중심적인 당면과제로 떠오르고 있다. 1997년 교육개혁위원회에서 교육개혁의 핵심을 ‘인성교육’과 ‘창의성 교육’으로 규정한 바도 그러하다. 이러한 시대적 요청과 당위성에 부응하여 영진전문대학 부설 영·유아 창의성 계발 연구소에서는 창의성을 발현하기 위한 다양한 프로그램을 통합적으로 개발하고 있으며 이러한 창의성 교육의 저변적 확산을 위한 하나의 대안으로 2000 가족과 함께 하는 창의성 경진대회를 개최하였다. 이는 기존의 많은 경시대회가 유아를 제외한 초등학교 이상을 대상으로 거의 실시되어져 오고 있으며 서울 중심으로 개최되고 있는 여러 가지 한계점을 극복하고 국내에서 최초로 유아를 대상으로 하는 창의성 경진대회라는 점과, 창의성 교육의 큰 축인 가족들에게 창의성 계발의 중요성을 일깨우는 계기가 되었다는 점에서 큰 의미가 있는 것으로 사려되어진다. 본 창의성 경진대회에서 유아는 빔 프로젝트의 애니메이션을 통해서 제기된 문제상황에 대한 다양한 해결방법을 참여한 가족원과의 논의를 통해서 하게 된다. 이러한 논의를 거친 뒤 유아와 가족원은 연구소 측에서 제시한 한정된 재료만을 이용하여 문제해결에 대한 창의적인 구조물을 완성하게되며, 이러한 산출물은 객관적인 심사로 평가받게 된다. 경진대회의 최종적인 평가는 문제해결을 하고 난 다음의 작품이외에 가족원들과의 협동하는 팀워크이나 참여태도가 관찰되어져 평가받게 된다. 이러한 평가기준은 창의성이란 창의적인 사고와 창의적인 태도를 함께 고려 해야한다는 관점에서 이루어진 것이다. 수상자 선정에 있어 점수의 집계가 수 작업으로 이루어져 최종심사결과통보가 지연되었으며, 홈페이지를 통해서만 결과를 발표해 아직 PC가 보편화되지 않은 학부모들이 불편을 겪었다는 점등이 차후 개선되어져 야 할 문제점으로 남았다. 만일 프로이드의 말처럼 인간의 성격이나 탐구의 태도가 아동 초기의 어린 시절에 형성되어지는 것이라면, 한사람의 창의력 또한 어린 시절에 그 기초가 형성될 것이며 이러한 기초형성에 가장 큰 요인을 형성하는 1차적 환경이 가정이라는 점에서 2000 가족과 함께 하는 창의성 경진대회는 창의성 축제의 한마당이었다고 감히 결론짓고자 한다.

• 한국식품과학회지
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• 제20권4호
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• pp.576-584
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• 1988

다수계 품종인 남풍, 밀양 23호와 일반계 품종인 화성, 진홍을 현미, 백미 그리고 겨로 구분한 12가지 시료에 대하며 불용성 식이섬유와 용해성 식이섬유로 구분하여 측정하였고 이를 합하여 총 식이섬유로 하였다. 한편 남풍, 밀양 23호, 화성 그러고 진흥 현미를 정백률 92%로 도정하는 과정에서 얻어진 겨로부터 neutral detergent fiber(NDF)를 분리하였다. 이 식이섬유의 특성을 측정하고자 수분 결합력(water-binding capacity, WBC), pH 변화에 따른 철분과의 결함정도. 담즙염과의 결합 정도를 측정 하였다. 이상의 결과를 요약하면 다음과 같다. 1. 현미, 백미 그리고 겨의 총 식이섬유 함량은 각각 6.44%, 3.22%그리고 22.24%였으며, 현미는 백미에 비해 2배 정도의 식이섬유를 공급할 수 있다. 2. Neutral detergent fiber(NDF)의 특성 실험에서 수분 결합력 (WBC)은 평균 $5.60{\pm}0.87g\;H_2O/g$ NDF로 수분 결합력이 커서 장관에서 물이나 작은 분자들을 흡수하여 팽창하며 궁극적으로 bulk flow에 영향을 미치게 된다. 3. 철분과의 결합력은 pH 5.0에서는 평균 24.63%, pH 6.0에서 19.64%, pH 7.0에서 48.98%로 pH에 따른 결합정도의 차이가 켰으며, 이러한 성질로 인해서 무기질의 흡수를 저해하므로 음식물 증에 식이섬유 함량이 높을 때 무기질의 흡수문제를 고려하여야 한다. 4. 식이섬유와 담즙염과의 결합정도는 $100{\mu}M$ sodium taurocholate의 농도에서 평균 $31.02{\pm}2.15%$가 결합 되었다. 식이성유의 이러한 기능으로 콜레스테롤의 재 흡수와 배설에 영향을 미쳐 혈장 콜레스테롤 농도를 낮추는 효과가 있는 것으로 추정된다. 의한 보호효과를 보면 전분과 자당을 동시첨가한 자당첨가동시보호구가 무보호 갈변경우에 비하여 20.5%정도 증가하였다. Fructosyl-lysine의 함량은 전분 첨가에 관계없이 갈변에 의하여 10배 이상 증가하였고 전분 첨가에 의한 보호효과를 보면 보호 방법에 관계없이 보호구가 무보호 갈변구에 비하여 $12.6{\sim}15.8%$ 정도 감소하였다. 진공포장함으로서 저장중 지질산패, 갈변 등 품질저하를 억제시킬 수 있었다.>가 20mM, $Na_2SO_3{\cdot}7H_2O$가 15mM 그리고 $NaHSO_3$가 25mM로 나타났다., 수원(水原)19호(號)와 제천옥(堤川玉)에서는 linoleic acid가 가장 높게 나타났다. 8) 당지질(糖脂質)의 구성지질성분(構成脂質成分)은 MGS, MGC 그리고 MGDG를 함유(含有)하며, MGS와 MGC는 진주옥(晋州玉)에서 가장 높은 반면에, 횡성옥(橫城玉)과 제천옥(堤川玉)에서는 가장 낮게 나타났다. 9) 총지질(脂質)의 지방산조성(脂肪酸組成)은 oleic, palmitic, linoleic그리고 heptadecanoic acid가 주성분(主成分)을이루고, 진주옥(晋州玉)에서 oleic acid가 가장 높은 반면에 heptadecanoic acid는 가장 낮게 나타났고, 제천옥(堤川玉)에서는 이와 반대(反對) 경향(傾向)을 보였다. 10) 순지질(燐脂質)의 구성지질성분(構成脂質成分)은 PI 및 PC를 함유(舍有)하며, 횡성옥(橫城玉)과 황옥(黃玉) 3호(號)에서 PI가 가장 낮게 나타났다. 11) 순지질(燐脂質)의 지방산조성(脂肪酸組成)은 palmitic, heptadecanoic 그리고 oleic acid가 주성분(主成分)을 이루고, 횡성옥(橫城玉)에서 oleic acid가 가장 높은 반면에, heptadecanoic acid는 가장 낮게

• 한국균학회지
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• 제27권4호통권91호
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• pp.256-273
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• 1999

ATCC(American Type Culture Collection)에서 분양 받은 2균주를 포함하여 1989년부터 1995년 사이에 국내 11개 장소에서 채집된 번데기동충하초(Cordyceps militaris) 72균주를 대상으로 기주적 지리적 근연관계에 따른 균주간 변이도를 관찰하고자 균사체의 배양적 특징 및 불완전세대 관찰과 DNA 분석에 의해 분류동정을 행하였다. 균사의 배양특성을 조사한 결과 균사의 자라는 모양, 속도, 색택 등에 있어서 균주간에 차이가 나타남이 관찰되었다. 번데기동충하초의 불완전 세대를 관찰한 결과 분생자경이 분지하며 윤생으로 형성되는 Verticillium속으로 동정되었으며 포자의 모양은 구형을 띠는 것으로 나타나 형태적으로는 각 균주간의 별 다른 차이를 발견할 수 없었다. 공시균주 중 인공자실체 형성이 우수하였던 두 균주(C18, C738)를 선택하여 단포자분리를 행하였으며 여기서 분리된 단포자균주 56균주와 공시균주 72균주를 대상으로 RAPD를 행하였다. RAPD에서 나타난 균주간 변이도를 NTSYS program을 사용하여 UPGMA 분석방법으로 phonogram을 작성한 결과 단포자 균주내의 평균 유전적 거리는 0.207로 나타났으며 단포자 분리를 행하였던 두 균주에 따라 각각 A그룹(C18)과 B그룹(C738)으로 나누어짐이 확인되었다. 두 그룹의 평균 유전적 거리는 각각 0.150(A group)과 0.163(B group)으로 나타났으며 그룹간 평균 유전적 거리는 0.221로 나타났다. 공시균주간에는 크게 그룹으로 나누어지는 경향이 관찰되지 않았으며 이들의 평균 유전적 거리는 0.330으로 나타나 본 실험에서 사용된 번데기동충하초(C. militaris)의 균주 간에는 33%의 유전적 변이가 있음이 확인되었다.고, SF4와 LF4는 처리군 중에 유의적으로 가장 낮은 값을 나타내었다. 총균수와 젖산균수의 변화는 용존 $CO_{2}$함량 변화와 유사한 경향을 나타내었다. SF4, LF4, SF15는 관능검사 결과 발효가 지연되어 풋내와 짠맛이 높게 평가되었고 탄산미는 낮게 평가되었다. LF25는 관능검사 결과 다른 처리군에 비해 신맛과 이취가 유의적으로 높게 평가되었다. $15^{\circ}C$에서 24시간 발효시킨 나박김치 (LF15)와 $25^{\circ}C$에서 12시간 발효시킨 나박김치(SF25)는 탄산미와 관계가 있는 용존 $CO_{2}$함량이 저장 12일까지 지속적으로 증가하였으며, 관능검사 결과 저장 기간 동안 다른 처리군에 비해 풋내와 이취가 적으면서 탄산미가 높게 평가되어 $15^{\circ}C$에서 24시간 발효(LF15)와 $25^{\circ}C$에서 12시간 발효(SF25)가 적합한 초기 발효 조건으로 생각된다. 이러한 연구 결과를 통해 물김치류인 동치미나 열무 물김치도 초기 발효 조건에 따라 이화학적, 미생물학적 및 관능적 특성에 많은 차이가 있을 것이므로 이에 대한 연구가 필요하다고 사료된다.화점에서 시판되고 있는 계란 총 446개에 대해서도 동일한 절차와 방법으로 조사하였던바, 재래시장에서 구입했던 계란의 난각부분(Egg-shell)에서만 가금티푸스(fowl Typhoid)의 병원체인 S. gallinarum이 1주$(0.2\%)$만이 분리되었고, 기타 세균으로서는 대장균군이 역시 난각에서 가장 높은 빈도로 분리되었고, 난황(Yolk)에서는 극히 낮은 수준의 세균오염도를 보였다. 다양한 동물종유래 S. aureus

• 시큐리티연구
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• 제28호
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• pp.33-56
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• 2011

상본 연구는 광주 전남 지역에서 근무하고 있는 현직경찰관의 견해를 경찰경호 관련학과 전공교과목에 대한 Q방법론적 선호도 분석을 실시하였다. 구체적으로 광주 전남 대학의 경찰행정 및 경호관련학과 전공교과목을 조합하여 27문항을 최종 진술문으로 추출하였으며 교과명이 유사하거나 중복된 교과목은 통합하고 다른 의미를 가진 교과목 간에는 분리 과정을 통해 질문지를 작성한 후 2011년 04월 현재 광주 전남지역에서 경찰관으로 재직 중인 20명을 최초 P-Sample로 선정하였다. 이 과정에서 불성실하게 응답한 6명의 자료를 제외한 14명의 자료를 최종 유효 표본으로 선정하였으며, QUANL. PC 프로그램을 적용 및 주 요인분석(principal component analysis)을 실시하였다. 본 연구에서 경찰경호 2개 영역 모두 분석대상으로 삼는 것은 표본특성 및 전공영역이 다소 상이하므로 이 연구에서는 제1차 연구로서 경찰관만을 대상으로 한 경찰전공 영역 교과목에 국한하여 분석연구를 실시하였다. 따라서 경호영역은 후속연구로서 세밀한 분석을 추가 실시할 계획이다. 이러한 연구절차와 연구과정을 통해 제I, II, III유형의 경찰경호 관련학과 전공교과목 선호도 분석을 실시하였다. 구체적인 결과는 다음과 같다. 제I유형은 형법, 형사소송법, 형사특별법 등의 교과목이 긍정적인 동의를 보였다. 제II유형은 범죄수사학, 구급 및 응급처치, 호신술, 형법, 형사소송법 등이 긍정적인 동의를 보였다. 제III유형은 범죄학개론, 범죄수사학, 형사소송법, 경찰학개론, 경찰윤리 등이 긍정적인 동의를 보였다. 이를 토대로 각 유형 간의 일치항목 즉, 공통된 의견을 다음과 같은 결론으로 도출하였다. 우선 긍정적인 공통된 전공교과목으로는 범죄수사학, 범죄학개론, 경찰윤리, 형사특별법, 형사사법실무, 경찰행정론, 경찰법규실습, 구급 및 응급처치, 호신술, 민법총칙, 행정법 등의 교과목이 현장근무시 경찰관들이 느끼는 현실적이고 실증적인 교과목임을 알 수 있었다.

• Asia pacific journal of information systems
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• 제23권4호
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• pp.1-28
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• 2013

Given that smartphone-based social network services (SNS), such as KakaoStory is now being widely used as a way for people to connect and communicate with each other, this study examines key factors leading to the continued use of SNS. People have been using PC-based SNS, such as Cyworld, for years are now using smartphone-based SNS, such as KakaoStory. KakaoStory developed by KakaoTalk has rapidly grown up as the largest smartphone-based SNS in Korea as smartphone penetration increases. It is more difficult for firms to maintain their current users over time in that alternative SNSs satisfying people's new needs are constantly emerging and evolving. In this sense, one of the most challenging issues for SNS firms is how to retain their current users in the long run. However, there are few empirical studies on this issue. Applying the IS continuance model proposed by Bhattacherjee [2001], this study explores key determinants of users' smartphone-based SNS continuance intention. The model suggests that perceived usefulness and user satisfaction are the key determinants of IS continuance intention. However, the model includes only the utilitarian value that users can obtain through the use of smartphone-based SNS, by considering perceived usefulness. Therefore, the study attempts to extend the IS continuance model by considering hedonic and social values simultaneously. More specifically, we consider subjective norms as social value that are proposed by the theory of reasoned action and the theory of planned behavior. We also consider perceived enjoyment as hedonic value that is emphasized as a key factor influencing users' behavior intention and actual behavior, particularly in the context of hedonic IS use. By considering the three values in our model simultaneously, we could offer a deeper understanding of smartphone-based SNS continuance. That is, this study could offer an explanation of how each value is associated with user satisfaction and SNS continuance intention. The customer value-satisfaction-loyalty model can strengthen the assertion that smartphone-based SNS continuance intention is determined by various different types of customer values, such as utilitarian, hedonic, and social ones. Moreover, the model provides a theoretical basis for the assertion that customer values lead to increased loyalty via customer satisfaction. In this regard, we theorize that SNS continuance intention is influenced by users' various values, namely perceived usefulness, perceived enjoyment, and subjective norms, via user satisfaction. To test the proposed research model and hypotheses, we conducted a partial least squares analysis using a total of 253 data collected on the users of smartphone-based SNS (i.e., KakaoStory). The key findings are as follows: First, it has been found that SNS continuance intention considerably depends on user satisfaction. Second, user satisfaction is determined by confirmation, perceived usefulness, and perceived enjoyment. Third, concerning the effects of the three values on SNS continuance intention, only perceived enjoyment regarded as hedonic value was statistically significant. That is, perceived usefulness considered as utilitarian value and subjective norms considered as social value had no effect on SNS continuance intention. Finally, our results indicate that confirmation increases perceived usefulness, perceived enjoyment, and user satisfaction. The results reconfirm the effectiveness of IS continuance model in predicting smartphone-based SNS continuance intention. Moreover, the results demonstrate that perceived enjoyment reflecting hedonic value is the most important predictor of SNS continuance intention. Therefore, it is imperative for firms to meet SNS users' hedonic value to retain them in the long run. Meanwhile, we could not find any empirical evidence to support the assertion that subjective norms are associated with user satisfaction and SNS continuance intention. The results lead us to conclude that when users have enough direct experience in SNS use, subjective norms have no effect on SNS continuance intention. Discussions and implications of the results are provided.

• 한국방사선학회논문지
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• 제18권3호
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• pp.257-265
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• 2024

본 연구는 자동노출제어 흉부 방사선 검사 시 신체 기능 일부를 대체 보조하거나 의약품 등을 주입하는 인체 이식형 의료기기가 흉부 영상의 선량과 화질에 영향을 미치는지 알아보고자 하였다. 제조회사와 모델이 다른 3대의 디지털 X선 발생장치와 인체모형 팬텀을 사용하여 흉부 검사와 동일한 방법으로 위치잡이를 선정 후 선행 연구에서 선량의 변화가 관찰된 인공심장박동기(Pacemaker), 심장 재동기화 치료기(CRT), 케모포트(Chemoport) 3개의 HIMD(Human Implantable Medical Device)를 상단 이온전리조센서에 부착한 후 Monte Carlo 방법론 기반의 프로그램 PCXMC 2.0을 사용하여 실험에서 도출된 DAP(Dose Area Product) 값을 입력하여 유효선량을 측정하였다. 또한 흉부 영상의 화질 평가를 하기 위해 가슴 부위에 관심 영역 3곳과 잡음영역 1곳을 설정하고 신호대잡음비(SNR; Signal to Noise Ratio), 대조도대잡음비(CNR; Contrast to Noise Ratio)를 측정하였다. 연구 결과는 유효선량의 유의미한 차이를 보여주었으며 AEC 적용과 미적용 그룹을 비교하였을 때 Pacemaker와 CRT는 유의한 차이가 있었다. (p<0.05) AEC 적용 시 Pacemaker에서 37%, CRT에서 52% 유효선량이 증가하였다. Chemoport는 유효선량의 10% 차이는 있었지만, 유의미한 차이를 보이지 않았다. (p>0.05) 영상 품질 평가에서는 모든 HIMD 삽입과 AEC 적용 유무에 따른 SNR, CNR의 유의미한 차이를 보이지 않았다. (p>0.05) 최종 결론은 AEC 적용 후 HIMD가 삽입된 환자의 흉부 X-ray 검사 시 유효선량이 증가하였으며 AEC 적용 유무에 따른 흉부 영상의 품질 차이는 없음을 알 수 있었다. 이는 HIMD가 삽입된 환자의 흉부 검사 시 AEC 미사용이 환자의 선량을 낮추는 타당성을 확인한 것이며 과피폭을 주의하고 피폭 저감화를 위한 다양한 방법을 모색하여야 한다.

• 지능정보연구
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• 제22권1호
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• pp.19-41
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• 2016

정보통신기술의 발전과 모바일 기기 사용의 생활화로 인해 최근 많은 소비자들이 멀티채널 쇼핑(multi-channel shopping)이라는 새로운 쇼핑 행태를 보이고 있다. 온라인 쇼핑이 등장한 이후, 온라인 매장에서 상품을 구매하기 전 오프라인 매장에서 상품을 먼저 확인하는 쇼루밍(showrooming) 형태의 멀티채널 쇼핑이 한 때 대세를 이루었으나, 최근에는 스마트폰, 태블릿 PC, 스마트워치 등 스마트 기기 사용의 폭발적 증가와 옴니채널(omni-channel) 전략으로 대표되는 오프라인 채널의 대대적 반격으로 인해 오프라인 매장에서 상품을 구매하기 전 온라인(혹은 모바일)으로 정보를 먼저 확인하는 웹루밍(webrooming) 현상이 도드라지게 나타나 온라인 소매업자를 위협하고 있다. 이러한 상황에서 소비자의 온라인 쇼핑에서 웹루밍으로의 쇼핑전환 의도에 영향을 미치는 요인을 분석하는 것이 의미가 있음에도 불구하고, 기존 대부분의 선행연구는 싱글채널(single-channel) 혹은 멀티채널 쇼핑 자체에만 초점을 맞추고 있다. 이에, 본 연구에서는 밀고-당기기-이주이론(push-pull-mooring theory)을 바탕으로 소비자의 온라인 채널 쇼핑이 웹루밍 형태의 쇼핑으로 전환되는 과정을 상품정보 탐색과 구매행위로 각각 구분하여 그 영향을 실증하였다. 연구모형을 검증하기 위하여, 웹루밍 경험이 있는 수도권 소재 대학생을 대상으로 280개의 설문 표본을 수집하였다. 본 연구의 결과는 현업 마케팅 종사자에게 멀티채널 소비자들을 관리하는 데 있어 실무적인 시사점을 제공함과 동시에, 향후 다양한 형태의 멀티채널 쇼핑전환 연구로의 확장에 기여할 수 있을 것으로 기대한다.

• 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.