• 자동차안전학회지
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• 제15권4호
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• pp.23-31
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• 2023

In recent years, the technology for autonomous driving has been advancing rapidly, ADAS (Advanced Driver Assistance System) functions, which improve driver convenience and safety performance, are mostly equipped in recently released vehicles and range from level 0 to level 2 in autonomous driving technology. Among the various functions of ADAS, AEBS (Autonomous Emergency Braking System), which analyzes traffic accidents, is the most closely related to the vehicle's braking. This study developed a simulation technique for reproducing accidents related to AEBS based on real vehicle experimental data, and it was applied to the analysis of actual ADAS vehicle accidents to identify the causes of accidents.

• Archives of Reconstructive Microsurgery
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• 제8권2호
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• pp.120-129
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• 1999

There were many difficulties in the treatment of extensive, massive, and composite defect in the lower extremity until early 1980's. Recently, microscopic reconstruction of wide soft tissue defect is popularized. But, the combined flap, which requires wide coverage of lower extremity after soft tissue sarcoma excision or traffic accident, is still challenging to the orthopaedic surgeons. We experienced 12 cases of combined scapular and latissimus dorsi flap from 1983 to 1997 in the lower extremity reconstruction of soft tissue defect with satisfactory result. There were no serious donor site complications such as functional disturbance of shoulder joint.

• 대한정형외과스포츠의학회지
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• 제2권2호
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• pp.92-99
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• 2003

스포츠 활동과 사고로 인하여 전방십자인대 재건술이 많이 증가하고 있으며 여러 종류의 자가 및 동종이식건이 많이 사용되어지고 있다. 자가 골-슬개건-골을 이용한 전방십자인대 재건술이 제일 대표적인 이식건으로 사용되고 있으나 공여부의 합병증과 전방슬관절통 등의 문제가 발생될 수 있으며 환자에 따라서 이러한 문제를 줄일 수 있는 다른 이식건의 사용도 필요할 수 있다. 여러 이식건의 생역학적인 특성, 장점 및 단점, 합병증을 충분히 이해함으로써 환자 개인에 맞는 적절한 이식건을 선택할 수 있으며 수술후 환자의 만족도를 높일 수 있을 것으로 생각된다

• 대한교통학회지
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• 제23권6호
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• pp.103-113
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• 2005

교통사고 중 차대보행자 사고의 원인분석은 차대차 사고에 비해 관련 연구가 미흡한 실정이다. 국내에서도 차대차 사고의 경우에는 실차충돌실험을 통해 많은 자료를 축척하고 이를 체계화하여 다각적인 방법으로 실제 교통사고에 적용하려는 노력이 있으나 차대보행자 사고의 경우에는 아직 시작단계라고 볼 수 있다. 선진국에서는 차대보행자 사고에 대하여 더미를 이용한 실차충돌실험을 통해 많은 모형을 개발하였고, 이를 보행자사고의 정확한 원인분석을 위해 활용하고 있다. 국내에서는 차대보행자 사고의 해석과 관련된 모형이 개발되지 않아 외국의 모형을 그대로 활용하는 것이 일반적이다. 그러나 외국의 모형을 이용하게 되면 차량과 보행자의 체위특성이 다른 경우 왜곡된 결과가 도출될 가능성이 많게 된다. 이러한 문제점을 해결하기 위해 본 연구에서는 그 동안 수집된 보행자 사고자료를 이용하여 국내 실정에 적합한 차대보행자 충돌모형을 개발하였다. 그 결과 차량의 속도에 따라 외국의 모형과는 다소 상이한 결과를 보이는 것으로 나타났다. 외국의 모형 중에서는 차량 및 보행자의 체위 특성이 유사한 일본의 모형과 가장 흡사한 것으로 나타났다. 이 연구 결과는 수십개의 자료를 이용한 것으로 장래에 보다 폭넓은 자료를 통하여 모형의 신뢰성을 높이는 노력이 필요하다고 판단된다.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2000년도 추계학술대회 논문집
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• pp.192-197
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• 2000

Real-time driving simulation is a comprehensive technology that can be applied effectively to vehicle and traffic safety improvement, by reproducing various driving conditions and situations realistically in a safe and controlled environment. This paper describes PC-based real-time driving simulation technology in terms of design factors and simulation components. It also introduces Kookmin University Driving Simulators developed based on these considerations, which have been applied effectively to ABS HILS and a human factor study concerning sudden acceleration accident reconstruction.

• Archives of Reconstructive Microsurgery
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• 제16권2호
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• pp.113-118
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• 2007

Purpose: The purpose of this work was to describe the results of treatment for motor vehiclerelated crushing injuries among children and adolescents under sixteen years in Korea. Materials and Methods: A retrospective analysis was conducted of data from children who were under sixteen year and injured foot by motor vehicles. Cases were documented 1) age at the time of injury, 2) injured site, 3) the area of accident, 4) the kind of vehicle, 5) associated injuries, 6) methods of treatment for soft tissue reconstruction and 7) complications. The relationships between the area of accident and associated injuries, and the kind of vehicle and associated injuries were analyzed using Chi-square test and Fisher exact test. Results: There were 97 children who were 15 year and younger. The mean age was 7.4 years, and 65% were boys. The left foot was more dominant side of injury (57%). Seasonal variation was seen with the number of injuries peaking during the summer (43%, p<0.05). Among the vehicles, 78.3% were the large vehicles (bus, truck or van). The where of accident was more frequent at an alley or less than two lanes of traffic. But, the relationships between the place of accident and associated injury or the kind of vehicles and associated injury were not statistically significant. The associated injury were fracture or dislocation (23 cases, 35.9%), injury of tendon (21 cases, 32.8%). There were amputation or disarticulation of foot in 8 cases (8.2%) and post-traumatic deformities such as flatfoot, hindfoot varus or valus deformities by tendon injury in 7 cases (7.2%). Conclusion: More than 50% of crushing or degloving injuries of child's foot by traffic accidents happened in boys between 5 to 9 years old. The associated injury was unrelated with size of vehicles or accident place at the time of accident. But, even though foot injury happened in an alley or one lane by small vehicles, child who hurt feet by car need thorough investigation about associated injury. If a surgeon keep in mind and treat child to associated injury necessarily, can minimize complication. Microsurgical reconstruction for soft tissue defect was prior to other methods.

• 대한교통학회지
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• 제32권5호
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• pp.503-512
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• 2014

본 논문에서는 펑크 타이어 힘 시험 연구 결과들을 다양하게 수집하고 분석하여, 펑크(blow-out) 타이어 차량 동적 거동 해석을 위한 구름저항력(rolling resistance), 셀프 얼라이닝 토크(self aligning torque), 코너링 강성(cornering stiffness), 반경방향 강성(radial stiffness)과 같은 관련 계수들의 적정값을 추정하였다. 이러한 타이어 펑크 관련한 입력계수들을 자동차 사고 해석 상용 프로그램에서 설정하여 타이어 펑크 효과를 구현한 시뮬레이션 해석을 수행하였다. 그리고, 정상 차량들 간의 다양한 충돌 형태들과 속도 등을 참조하여, 펑크 차량의 충돌 유형들을 구성하고 시뮬레이션 해석을 수행하여 충돌 특성을 구하였다. 본 연구에서 제시하는 타이어 펑크 혹은 손상에 대한 고려는 보다 신뢰성 있는 자동차 사고 재구성에 기여할 수 있을 것이다.

• 한국자동차공학회논문집
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• 제13권4호
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• pp.8-18
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• 2005

Pedestrians involved in traffic accidents manifest unique trajectory characteristics depending on the collision speed, vehicle configuration, and pedestrian postures. However, the existing analytical models for pedestrian movements do not fully include the rotational characteristics of the pedestrians because they assume a two dimensional parabolic trajectory. This faulty assumption in the development of these models limits their applicability and reliability This study investigated the pedestrians movement at collision by computer simulation. The simulations are carried out by using HADYMO, which is a special simulation software system for dynamic movement analysis. Vehicles and pedestrians are modeled and verified via real crash worthiness experiments. Simulations are performed for various collision speeds, vehicle configuration, and pedestrian postures. Since the simulation uses multi-body dynamics, It can express irregular phenomena of the bodies quite well. The results can be exploited for vehicle design and traffic accident reconstruction.

• Archives of Plastic Surgery
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• 제50권5호
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• pp.523-528
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• 2023

The Gustilo IIIB tibiofibular fractures often result in long bone loss and extensive soft tissue defects. Reconstruction of these complex wounds is very challenging, especially when it includes long bone grafts, because the donor site is limited. We describe our experience using a set of chimeric ipsilateral vascularized fibula grafts with a thoracodorsal artery perforator free flap to reconstruct the traumatic tibia defects. A 66-year-old male suffered a severe comminuted tibia fracture and segmented fibula fracture with large soft tissue defects as a result of a traffic accident. He also had an open calcaneal fracture with soft tissue defects on the ipsilateral side. All the main vessels of the lower extremity were intact, and the cortical bone defect of the tibia was almost as large as the fractured fibula segment. We used an ipsilateral vascularized fibula graft to reconstruct the tibia and a thoracodorsal artery perforator flap to resurface the soft tissue, using the distal ends of peroneal vessels as named into sequential chimeric flaps. After 3 weeks, the calcaneal defect was reconstructed with second thoracodorsal artery perforator free flap. Reconstruction was successful and allowed rapid rehabilitation because of reduced donor site morbidity.

• Journal of Chest Surgery
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• 제29권2호
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• pp.239-243
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• 1996

역행성 호흡 운동을 방지 하고 종격동내의 구조물을 보호하는 흥곽의 기능을 고려해야 하기 때문에 흉벽 재건은 임상적으로 간단하지가 않다. 영남대 학교병원 흉부외과에서는 교통사고로 좌측 전흉부의 전층에 걸친 흉벽 결손을 가진 37세 남자 환자에게 흉벽 재건술을 시행하였다. 외상직후 변연 절제와 지혈을 위해 1차 응급 수술이 시행되었고, 수술후25일째 흉벽 재건을 위한 2차수술을 시행하였다. 흉벽재건에는 흉배동맥을 피판경으로한 광배근피판과 좌측 대퇴부로부터 피부이식이 이용되었다. 흉벽 재건 수술후 인공호흡기 보조없이 자가 호흡이 가능하였으며, 수술후 3개월에 시행한 폐기능 검사(FVC, FEV1.0)는 예측치의 80%로 나타났다. 광배근피판을 이용한 흉벽 재건의 수술후 경과는 생리학적, 해부학적 그리고 미학적으로도 만족할만 하였다.