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유우석(Wooseok Yoo),박지용(Jiyong Park),유종훈(Jonghun Yoo),김세화(Saehwa Kim),홍성수(Seongsoo Hong) 한국자동차공학회 2006 한국자동차공학회 Symposium Vol.- No.-
To overcome the ever increasing complexity of automotive software, it is inevitable to employ a standardized software platform. AUTOSAR is the well known automotive software platform from the European automotive industry. It provides a standardized communication layer called Run-Time Environment (RTE) that simplifies communications among automotive software modules distributed on in-vehicle networks. It also provides essential services that encapsulate the heterogeneity of in-vehicle hardware and system software, such as operating systems and ECU/microcontroller abstraction modules. These enable programmers to concentrate on implementing their own business logic. In this paper, we present the key concepts, software architecture, and development process of AUTOSAR-based automotive software systems.
하지수술에서 Ropivacaine-Fentanyl 경막외마취시 첨가한 Clonidine의 용량에 따른 효과
고우석,정종달,안태훈,유병식,임경준,소금영,이현영 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.4
Background: Ropivacaine is an amino amide local anesthetic that has an advantage of a low-toxicity profile. Clonidine, an α_2 adrenergic agonist, is known to prolong and intensify anesthesia from epidural local anesthetics. The aim of this study was to evaluate the dose-response effects of added clonidine to ropivacaine-fentanyl epidural anesthesia for lower extremity surgery. methods: Forty-five patients undergoing lower extremity surgery were randomly allocated to three groups to be given the following agents by and epidural route: 0.75% ropivacaine 15 ml + fentanyl 50 ㎍ (group Ⅰ), 100 ㎍ (group Ⅱ), or 150 ㎍ (group Ⅲ). Onset and maximal height of sensory block, and duration of sensory and motor block were assessed. Also, blood pressure, heart rate and sedation score were measured. Results: Duration of sensory and motor block of groups Ⅱ and Ⅲ was significantly longer than that of group Ⅰ, but there was no difference between group Ⅱ and group Ⅲ. Two segment regression times were significantly different among the three groups. Onset of sensory block, blood pressure, heart rate, and sedation scores were not significantly different among the three groups. Conclusions: The addition of Clonidine 100 and 150 ㎍ prolonged duration of anesthesia more than 50 ㎍ with ropivacaine-fentanyl epidural anesthesia for lower extremity surgery. (Korean J Anesthesiol 2002; 43: 429~435)
VRS-RTK GPS측량을 이용한 지적도근점 정확도 분석
최우석(Choi, Woo Seok),유환희(Yoo, Hwan Hee) 대한공간정보학회 2011 대한공간정보학회지 Vol.19 No.4
GPS상시관측망 자료를 이용하여 국토지리정보원에서는 VRS 서비스를 하고 있으며 실시간적이고 정확도를 높이기 위해 VRS-RTK 측량방법이 널리 사용되는 추세이다. 하지만 VRS-RTK GPS 측량에서 이동국과 기지국간의 거리가 멀어지면 정확도가 떨어지는 경향이 있다. 본 연구에서는 지적도근점측량 시 이러한 문제점을 파악하기 위해서 GPS 상시관측망의 안쪽과 바깥쪽에 존재하는 경남 거제시의 실험지역 두 곳을 선정하여 정확도를 분석하였다. 두 지역을 대상으로 정확도를 분석한 결과 위치오차에 대한 평균제곱근오차는 ±0.03m로서 지적측량 규정내에 있었으며, 지적측량 시 VRS-RTK GPS 측량의 적용가능성을 제시하였다. National Geographic Information Institute provides VRS service using permanent GPS networks. VRS-RTK(Virtual Reference System-Real Time Kinematic)GPS surveying which enable to accomplish the real time-based GPS surveying has been increasingly popular. However the positioning accuracy tends to deteriorate as the distance between the rover and base station increases in the VRS-RTK GPS surveying. To analysis this problem in this study, the accuracy of VRS-RTK data was analyzed with 2 different test sites of Geoje city, Gyeongnam province within and without the permanent GPS networks in order to accomplish the cadastral supplementary control surveying. As a result of surveying accuracy analysis at two test sites, positioning errors were ±0.03m(RMSE) in both sites. The result was that within the tolerance specified in cadastral surveying law, and indicated the possibility of VRS-RTK GPS surveying in cadastral surveying.
성상신경절 차단 후 발생한 경부 혈종 및 혈흉 : 증례보고
고우석,임경준,유병식,임영재,조성일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3
The stellate ganglion block is one of the most frequently performed blocks in the pain clinic due to its wide range of indications and its simplicity. But it has a potential to cause severe complications because there are some major vessels and nerves around the stellate ganglion. We experienced a rare case of intrathoracic bleeding and hematoma in neck after stellate ganglion block. A 61-years old female patient admitted to ER because of breathing difficulty. She was taken stellate ganglion block in local pain clinic 6 hours before the admission to ER. The patient complained of pain in the neck and dyspnea. We confirmed severe hematoma and contrast leakage in thyroid region and hemothorax. So we applied a endotracheal intubation for the airway insurance and surgical hematoma removal and vessel ligation were done. The patient was discharged from hospital after the treatment of pharyngeal and laryngeal hematoma and hemothorax without further problem or complications after 22 days.