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어경윤,김욱년,최대섭 동국대학교 경주대학 2000 東國論集 Vol.19 No.-
Spinal cord infarction occurs infrequently and may have diverse causes. In the cervical cord, the anterior spinal artery is supplied by anterior radicular arteries arising from vertebral arteries and cervical arteries. Cervical cord infarction in commonly considered to be due to occlusion of the ant spinal artery, but a similar clinical presentation can occur in radicular occlusion. A 77-year-old man presented with sudden onset of right-side neck pain and quadriparesis. On admission he had developed paraplegia and distal motor weakness of both upper limbs, dissociated sensory disturbances, and loss of bladder function. MRI revealed symmetrical infarction of the ventral one third of the spinal cord segment C5 to C7 and severe spondylotic degeneration. MR angiography findings showed right vertebral occlusion. The patients was treated with intravenous steroid, but clinical course was unfavourable. We report a case of anterior cervical cord infarction with typical MRI findings and MR angiography.
Customer journey map의 한계 및 개선방안에 대한 연구 : 실제 요식업체 매장 중심으로
김태완(Taewan Kim),김경윤(Kyungyoon Kim),김하나(Hana Kim),최은섭(Eunsub Choi),이정연(Jeongyoun Lee) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1
학교 수업의 일환으로 서비스디자인을 진행하였는데, 대상은 갓 오픈한 요식업체 매장이다. 이 매장은 점심시간에 식사를 판매하고 저녁시간에는 술을 판매하는, 인근의 요식업체 매장과는 다른 형태인데 점심시간의 매출이 업주 생각보다 높지 않아 고민하고 있는 상태였기에, 우리는 매출 증대를 위해 서비스디자인을 제안하였고 초기 문제발견 단계부터 시작하였다. interview와 Persona를 통한 customer journey map의 작성과 context mapping을 진행하던 중, customer journey map에서 도출된 pain point들이 최종적으로 해당 매장을 찾는 여부와는 관련성이 약한 점을 발견하게 되었다. 따라서 이 논문에서는 customer journey map의 touch point들 중, 고객들이 중요하게 생각하는 부분을 찾아 가중치를 부여하는 보완된 customer journey map을 제안한다. 이를 통해 서비스디자인 실행 단계에서 고객이 중요시하는 서비스에 집중하여 시간, 비용적인 자원의 감소와 의뢰 업체에 최적의 제안을 하는데 기여할 수 있을 것이다. As a part of schoolwork make progress service design then that was just opening restaurant department. The department was selling a meal in lunch, and alcoholic in evening that the store is different forms of others. But business owners worried about lower sales. So we proposed to make progress service design for increase sales, then started from beginning problem detection stage. Through interview and persona draw up for customer journey map after making progressing of context mapping then, drawing from customer journey map found out pain point that is weak of connection point for search the said store lastly. Consequently about this paper said that among touch point of customer journey map, that propose searching customer regarding significantly compensate the customer journey map. Through the way, focus on the customer attach great importance to service at practice stage, in the end we contributed to suggest for decrease of resource costly and optimum propose to business of request.
탄소 나노튜브 나노유체의 수평관에서의 압력강하 특성에 관한 연구
고권현(Gwon Hyun Ko),허경윤(Kyungyoon Heo),이경준(Kyungjun Lee),김대성(Dae Seong Kim),김종엽(Chongyoup Kim),손양수(Yangsoo Sohn),최만수(Mansoo Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
This study performs the measurement of thermal conductivity, viscosity, and pressure drop in the pipe flow of the aqueous suspensions of multi-walled carbon nanotubes. Two different methods are used to prepare stable nanotubes suspensions. One of them is to make the surface of nanotubes hydrophilic by acid treatment (TCNT nanofluids), and the other is to disperse nanotubes using sodium dodecyl sulfonate (SDS) as a surfactant (PCNT nanofluids). From the measurement of viscosity, it is observed that nanotubes suspensions are shear thinning fluids, for which the viscosity decreases with increasing shear rate. The enhancement of thermal conductivity is proportional to CNT concentration for both CNT nanofluids. Under laminar flow conditions, the friction factor of PCNT nanofluids is much larger than that of TCNT nanofluids. In contrast to this, under turbulent flow conditions, the friction factors of both nanofluids are similar to that of the base fluids.