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신덕철 안동대학교 농업개발원 1999 最高農業經營者課程 論文集 Vol.3 No.-
현재의 농업은 화학비료와 농약에 의해 이루어진 농업은 대량 생산의 장점은 이루어 냈지만 그에 의해 저질러진 환경파괴와 각종 암, 성인병, 공해병 등이 나타났다. 그래서 앞으로의 농업은 화학농업의 모순과 폐해를 지적하고 지양하며 과학에 기초하여 생물의 생명법칙을 중시하며 자연의 법칙을 배우며 거기에 순응하여 인간과 자연이 함께 공존하는 농법이 되어야 할 것이다.
신덕철(Duk Chul Shin),설호준(Ho Jun Seol),왕규창(Kyu-Chang Wang),조병규(Byung-Kyu Cho),김승기(Seung-Ki Kim),심은보(Eun bo Shim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Moyamoya disease (MMD) is characterized by bilateral intimal thickening of distal internal carotid arteries (ICA's) and development of many collateral vessels in the base of the brain. Although the origin of MMD and the reason why it is limited to the major vessels remain unclear, flow dynamics such as shear stress may be related to its smooth muscle cell migration. Therefore, this study was performed to find out the local hemodynamic factor which concerns predominance of specific anatomic site such as distal internal carotid artery(ICA) and posterior cerebral artery (PCA) in progressed stages. We simulated the hemodynamics in cerebral arteries in circle of Willis using the computational models of two dimensional geometries of distal ICA and PCA. A finite element package, ADINA was used to simulate the blood flow in these arteries. Numerical results showed that shear stress is relatively low at the ICA region. It was seen that the shear stress distribution was related to the moyamoya disease.
3차원 모델을 이용한 모야모야병과 연관된 뇌동맥 혈류역학 해석
신덕철(Duk Chul Shin),설호준(Ho Jun Seol),왕규창(Kyu-Chang Wang),조병규(Byung-Kyu Cho),김승기(Seung-Ki Kim),심은보(Eun bo Shim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Moyamoya disease (MMD) is characterized by bilateral intimal thickening of distal internal carotid arteries (ICA's) and development of many collateral vessels in the base of the brain. Although the origin of MMD and the reason why it is limited to the major vessels remain unclear, flow dynamics such as shear stress may be related to its smooth muscle cell migration. Therefore, this study was performed to find out the local hemodynamic factor which concerns predominance of specific anatomic site such as distal internal carotid artery(ICA) in progressed stages. We simulated the hemodynamics in cerebral arteries in circle of Willis using the computational models of three dimensional geometries of distal ICA. A finite element package, ADINA was used to simulate the undteady non-Newtonian blood flow in ICA. Numerical results showed that shear stress is relatively low at the ICA region. It was seen that the shear stress distribution was related to the moyamoya disease.
한글에 대한 전자필적에서 필적의 종류에 따른 운동정보의 차이
육심엽,신덕철,김홍석,강태이 한국과학수사학회 2023 과학수사학회지 Vol.17 No.1
Electronic handwritings, which are produced by an electronic device, has been prevalent by the digitization, and demands on the forensic handwriting examination of the electronic handwritings are increasing. For the basic investigation of the forensic handwriting examination of the electronic handwritings, we gathered dynamic features of the hangul electronic handwritings, and analyzed the dynamic features of disguised and simulated handwritings comparing the genuine handwritings. In this study, dynamic features of the disguised handwriting and simulated handwriting are different from those of the genuine handwritings in hangul sentences. dynamic features including speed, pen-lift, and writing duration represent behaviors such as deliberate writings. The pen-lift of the simulated writings had broader distribution and longer average values than that of the genuine writings, and writing duration of the simulated writings was longer than that of the genuine writings. 전자기기로 작성된 전자 필적에 대한 필적감정 의뢰가 정보화 및 디지털화에 의해 나날이 커지고있으며, 운동 정보가 함께 결합한 전자 필적과 필적감정에 관한 연구가 진행되고 있다. 전자 필적의 필적감정 접근을 위한 기초조사를 위하여 한글 전자필적에서 자연스러운 필적을 기준으로, 숨김필적, 모방필적과 같은 필적 종류에 따른 운동 정보의 차이점과, 어떤 운동 정보에서 필적 종류에 따른 차이점이 발현되는지 살펴보았다. 본 연구에서는 한글 전자필적에서도 숨김 및 모방필적에 따라 이미지 및 운동정보의 차이점이 관찰되었다. 필속, 펜이 뜬 시간, 필기기간과 같은 운동 정보의 차이는 고의적 글쓰기와 같은 필기행동 양상을 반영하며, 특히 모방필적의 펜이 뜬 시간과 필기기간은 자연스러운 필적의 펜이 뜬 시간보다평균값이 크고, 분포가 넓었으며, 자연스러운 필적의 필기기간보다 더 길었다.