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Near-Infrared Autofluorescence Image-Guided Parathyroid Gland Mapping in Thyroidectomy
Kim, Sung Won,Lee, Hyoung Shin,Ahn, Yeh-Chan,Park, Chan Woo,Jeon, Seok Won,Kim, Chang Hoi,Ko, Jae Beom,Oak, Chulho,Kim, Yikeun,Lee, Kang Dae Elsevier 2018 Journal of the American College of Surgeons Vol.226 No.2
<P><B>Background</B></P> <P>Studies to date have shown that near-infrared autofluorescence imaging (NIR) can detect the parathyroid gland during thyroidectomy. However, there are no reports that NIR imaging can identify the parathyroid gland when it's covered with fibrofatty tissue before identification by a surgeon's naked eye. In this study, we investigated the feasibility of parathyroid gland mapping to facilitate early identification of the parathyroid gland during thyroidectomy.</P> <P><B>Study Design</B></P> <P>Seventy parathyroid glands from 38 patients who underwent thyroidectomy for papillary thyroid cancer were included in this prospective study. Near-infrared with infrared illumination (NIR-IR) imaging using a 780-nm light-emitting diode was conducted at the predicted locations of the superior or inferior parathyroid glands. Parathyroid mapping was conducted in 3 stages. Stages P1, P2, and P3 were defined as imaging before identification of the gland by direct visualization, imaging after identification, and imaging in the removed specimen, respectively.</P> <P><B>Results</B></P> <P>Sixty-four parathyroid glands (92.8%) could be localized in stage P1 before surgical dissection and exposure of the gland. Five parathyroid glands that were not detected at stage P1 were identified in stages P2 (4 cases, 5.8%) and P3 (1 case, 1.4%). One parathyroid gland was not identified in either the NIR imaging or the pathologic examination. The sensitivity, specificity, and accuracy of parathyroid gland mapping in stages P1, P2, and P3 were all 100%.</P> <P><B>Conclusions</B></P> <P>Parathyroid gland mapping using our NIR-IR imaging technique was feasible, with an excellent accuracy rate. This technique may be helpful for early identification of parathyroid glands during thyroidectomy.</P>
Automatic Thresholding Method for the Detection of Brain Ventricle in MRI Brain Images
Chulho Won,Dong-Hun Kim,Jyung-Hyun Lee,Sang-Hyo Woo,Chang-Wook Kim,Jin-Ho Cho 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
This paper suggests an algorithm that can detect a brain ventricle; compares that algorithm with the geodesic active contour model numerically and visually by applying real MRI brain images; and verifies the efficiency of the proposed algorithm.
건축물 에너지 수요 예측을 위한 이종 공공 데이터 통합 방안 연구
김철호(Chulho Kim),김한주(Hanjoo Kim),변지욱(Jiwook Byun),고재현(Jaehyun Go),허연숙(Yeonsook Heo) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This study investigated a method of integrating building energy-consumption public data such as MOLIT EAIS and KEPCO AMI to develop the probabilistic models to predict the electricity demand of non-residential buildings. The data set was created by integrating electricity data composed by consideration of time (24 hours) of 9 business types into 5 building types (i.e., education, office, hotel, culture, retail). Individual building energy data source alone provides partial information, and different data sources are at different temporal resolution. Therefore, there is a strong need to develop a framework to integrate various types of public data sets, and this data-integration framework will be essential to develop building energy forecasting models at high resolution levels.
김철호(Chulho Kim),박윤철(Yeunchul Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This research aims to develop parts for advanced fuel/oil filtering re-circulation applicable to this kind of regulation proof engines. These parts can play a role of converting traditional air emission type crankcase into recovery type crankcase so that the engine can deal with environmental regulations, which do not allow minimal amount of toxic gas discharge. The results showed that oil separation efficiency of the cyclone type CCV(Crankcase Ventilation)system was higher than one of baffle type both in CFD program
평생교육에 대한 참여동기와 관여가 평생교육 학습자의 만족, 지속수강의도, 권유의도에 미치는 영향
김철호(Chulho Kim) 한국콘텐츠학회 2015 한국콘텐츠학회논문지 Vol.15 No.6
본 연구의 목적은 평생교육에 대한 참여 동기와 관여가 평생교육 학습자의 만족, 지속 수강 의도, 그리고 권유 의도에 미치는 영향을 실증적으로 살펴보는데 있다. 평생교육 참여 동기는 실용적, 오락적, 관계적, 목표지향적 참여 동기로 구분하고, 평생교육에 대한 관여는 상황적 관여와 지속적 관여로 구분하였다. 정량적 연구 결과, 실용적 참여 동기와 오락적 참여 동기는 평생교육에 대한 상황적 관여와, 목표지향적 참여동기와 관계적 참여 동기는 평생교육에 대한 지속적 관여와 상관관계가 높은 것으로 나타났다. 아울러, 교수 방법에 대한 만족에는 실용적 동기가, 시설 편리성에 대한 만족에는 오락적 동기가, 소통에 대한 만족에는 관계적 동기가, 콘텐츠 품질에 대한 만족에는 목표지향적 동기가 상대적으로 더 높은 영향을 미치는 것으로 나타났다. 평생교육에 대한 상황적 관여는 콘텐츠 품질에 대한 만족에, 지속적 관여는 교수 방법에 대한 만족에 상대적으로 더 큰 영향을 미치는 것으로 나타났다. 평생교육 지속 수강 의도에는 콘텐츠 품질에 대한 만족이, 평생교육 권유의도에는 시설편리에 대한 만족이 상대적으로 더 큰 영향력을 미치는 것으로 나타났다. The purpose of this research is to examine the effect the motives for participating in lifelong education and involvement on lifelong education have on the learners satisfaction from lifelong education, the continuous intention to take courses, and the intention to recommend lifelong education. The results from a quantitative research show that the practical and recreational motives had a high positive correlation to situational involvement in lifelong education and that the relational and goal-oriented motives had a high positive correlation to continuous involvement in lifelong education. Moreover, for satisfaction about teaching methods, practical motives had a relatively higher effect. For satisfaction about facility comfort, recreational motives had a relatively higher effect. For satisfaction about communication, relational motives had a relatively higher effect. For satisfaction about contents quality, goal-oriented motives had a relatively higher effect. The finding also shows that situational involvement had a relatively higher effect on satisfaction about contents quality. Continuous involvement had a relatively higher effect on satisfaction about teaching methods.
디지털 사이니지 이용 동기로서의 기대 가치 측정에 대한 탐색적 연구
김철호(Kim, Chulho) 한국디자인지식학회 2013 디자인지식저널 Vol.28 No.-
본 연구는 상호작용적 미디어로 주목받고 있는 디지털 사이니지 개념에 소비자 행동 분야의 기대 가치 개념을 학제적으로 적용, 디지털 사이니지 이용 동기로서의 기대가치 측정 척도를 탐색적으로나마 제시하는데 그 목적이 있다. 사전 조사와 본 조사를 통해 디지털 사이니지 이용 동기는 39개 측정 항목으로 요약되었고, 이는 기술적 관점의 정보성, 상호작용성, 즉시성, 네트워크성, 기능통합성, 편재성 기대 가치, 인지적 관점의 편리성, 재미성, 호기심, 사회적 존재감 기대 가치, 그리고 생태환경적 관점의 환경 친화성 기대 가치로 정리되었다. 확인적 요인분석 결과, 잠재적 측정 모델 적합도는 적절한 것으로, 개념타당성, 수렴타당성, 내적일관성, 판별타당성 모두 적합한 것으로 확인되었다. 본 연구의 의의로는, 첫째, 디지털 사이니지 개념에, 기대 가치 개념을 학제적으로 적용한 점, 둘째, 행동의 동인과 연계된 기대가치 중심의 연구를 시도한 점, 셋째, 디지털 사이니지 효과 측정을 위해, 기대 가치 개념을 정량화 한 원인 변수로 파악하고자 한 점 등이다. The purpose of this study is to suggest the scales measuring value expectation as a motivator to use digital signage with interdisciplinary and exploratory approaches. Through the pre-test, the motivators to use digital signage were categorized as the technical perspective, the cognitive perspective, and the eco-environmental perspective. In detail, the technical perspective was divided into an informative, an interactive, an immediate, a network, a function-integrated, and a ubiquitous value expectation. The cognitive perspective was divided into a convenience, an enjoyable, a curiosity, and a social-existence value expectation. The eco-environmental perspective was focused on an eco-friendly value expectation. As a result of a confirmatory factor analysis on the value expectation as a motivator to use digital signage, the latent measurement model was confirmed as reasonable. The results also show that the standardized regression weight(β), construct reliability, and variance extracted on the measured variables of the value expectation were confirmed as reasonable, too. After executing the confirmatory factor analysis, the discriminant validity was tested by comparing the correlation coefficients, the variance extracted, and the squared correlation coefficients. This research has the following significances. First, this study applies value expectation from the field of consumer behavior into digital signage, regarding it as the major fourth media in the field of advertising industry, with interdisciplinary approaches. Second, to measure the effect of digital signage, this study regards the value expectation as measurable causal variables. Third, even though it is an exploratory approach, this study tries to build the strategic foundation to measure, confirm, and manage digital signage as a major part of city design.