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CAN 통신 파형 분석으로 물리적인 계층 결함 분석 연구
심우철 한국기계기술학회 2023 한국기계기술학회지 Vol.25 No.1
In this paper, a study was conducted on the analysis of communication circuit faults using oscilloscope waveform analysis. Circuit resistance was calculated based on voltage and operating current values using a simple equation, and it was confirmed that the increase in resistance of the communication circuit could be analyzed by analyzing the voltage level during transmitter operation. By combining information of the controller ID, the location of the fault was identified and it was concluded that the location of the fault can be quickly found by analyzing the oscilloscope waveform and the controller ID information. Additionally, the value of communication line contact resistance can be calculated using a simple equation, and the location of the fault can be found by analyzing the communication voltage level and ID information.
심우철 ( Woochul Shim ),류호철 ( Hocheol Ryu ),이주혁 ( Joohyuck Lee ),신창섭 ( Changsub Shin ) 충북대학교 산업과학기술연구소 2016 산업과학기술연구 논문집 Vol.30 No.1
Before occupants inhale fatal amount of toxic gas, evacuation should be started in case of indoor fire. To trigger an alarm, fire should be detected by fire detectors. In this study, to measure the response time of various fire detectors, four kinds of combustibles were experimented. The response times of a differential temperature fire detector, a smoke detector and a constant temperature type fire detector were analyzed by carrying out fire experiments of dry wood, wet wood, rubber and heptane. The response time of a differential temperature fire detector was faster than a fixed temperature detector for wood fire. In case of rubber fire, a smoke detector was effective than any other detectors and the variation of response time of a differential detector for heptane fire was very small.
혈관경화제를 이용한 구강 내 혈관기형의 치료: case series
심우철(Woo-Chul Shim),양석환(Seog-Hwan Yang),조진용(Jin-Yong Cho) 대한치과의사협회 2021 대한치과의사협회지 Vol.59 No.12
Vascular malformations are structural abnormalities in blood vessels with normal endothelial cell turnover, and are known as one of vascular abnormalities along with hemangiomas. Vascular malformations can occur anywhere in the body and are relatively rare in the oral cavity. It presents symptoms such as bleeding, pain, and swelling, and can cause functional and aesthetic problems. Treatment methods for vascular malformations include surgical excision, Nd:YAG and CO2 laser therapy, embolization and sclerotherapy. In this study, three cases of vascular malformations in the soft tissues of the oral cavity were identified. We report three cases who were simply treated using sclerotherapy with a review of the literature. Sclerotherapy using a sclerosant showed successful results, and known complications were not observed. In properly selected patients with vascular malformation, sclerotherapy can be considered as the first treatment.
심우철(Woo Chul Shim),이광훈(Kwang Hoon Lee),방동식(Dong Sik Bang) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.6
We herein report a case of keratoderma showing the combined clinical manifestations of striate and marginal keratoderma. The patient was a 18-year-old giri who about a year ago noticed slightly yellowish, well-circurnscribed, hyperkeratotic plaques on the volar aspect of the fingers and palms of both hands in a linear pattern with bands of hyperkeratotic plaques at the edeges of the 2nd fingers. We also found hyperkeratotic plaques on the both soles which were confined to sites of pressure. She denied a history of any chronic pressure or trauma. There was no family member showing the same clinical features. The histopathological findings from the palm, volsr aspect of finger and a sole revealed marked hyperkeratosis, hypergranulosis, and acanthosis.
심우철(Woo Chul Shim),이광훈(Kwang Hoon Lee),방동식(Dong Sik Bang) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.6
We report a case of fibrous hamartoma of infancy in a 7-month-old male infant, in which a solitary, asymptomatic, walnut-sized, nomal skin-colored plaque occurred on the left middle back for about one month. Histopathologic findings showed the distinctive features of fibrous hamartoma of infancy, ie, trabeculae of dense collagenous tissue, whorls of immature spindle cells within a mucoid matrix, and interspersed mature adipose tissue, in the lower dermis. The lesion was excised without recurrence.