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은종필(Eun Jong-Pil),최성훈(Choi Sunghoon),강동훈(Kang Donghoon) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Measurement of dynamic characteristics are widely used to detect damages in various machines or civil structures. The most common approach is to measure changes in frequency spectrum or mode shapes using accelerometer sensor. Another method, which compares the mode shapes measuring the strain of structures instead of measuring the shape of displacement mode using the accelerometer sensor, is advantageous in inspecting the damages of the structures as the strain mode is sensitive to local damages compared to the displacement mode. In this paper, we compared strain gages and FBG sensors for the measurement of dynamic characteristics of structure.
은종필(Eun Jong-Pil),최성훈(Choi Sunghoon),박춘수(Park Choonsoo),강동훈(Kang Dong-Hoon),송성진(Song Sung-Jin),김기환(Kim Ki-Hwan) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Typically electronic resistance type sensors have been used for measurement system of high-speed trains. But due to a large number of measurement quantities, we had difficulties in installing and maintaining the cables that connect sensors and measuring devices. Furthermore, signals obtained from the electronic resistance type sensors are often distorted because the sensors and cables are vulnerable to electro-magnetic interference (EMI). In this paper the characteristic of FBG sensors are compared with those of electronic resistance type sensors in application for the measurement system of high-speed trains. FBG sensors haveadvantages because of their multiplexing characteristic and robustness to EMI environment.
최성훈(Choi Sunghoon),은종필(Eun Jong-Pil),강동훈(Kang Donghoon) 한국철도학회 2009 한국철도학회 세미나자료 Vol.2009 No.5
Measurement of dynamic characteristics are widely used to detect defects in mechanical or civil structures. The most common approach is to measure changes in frequency spectrum or mode shapes using accelerometers. An alternative to using mode shapes is using stain modes. Strain is more sensitive to local defects than displacement, and hence stain modes measurement is an efficient in structural health monitoring. This paper deals with dynamic monitoring of a beam structure using strain sensors. Resistive strain gages and FBG strain gages are used and their characteristics are compared. It has been known that resistive strain gages are week to EMI environment and suffers from noise at high frequency range. It has been shown that the FBG sensor is a good alternative that overcomes such difficulties.
은종필,정남,신문수 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.9
Nineteen patients suffering from post-traumatic intracerebral hematoma, being managed by stereotactic aspiration of hematoma were evaluated. The outcome in this series is quite satisfactory, with 58% of patients having a functional survival. Eight patients died, of which three patients died of brain swelling and 5 died of systemic causes such as respiratory failure, gastrointestinal(GI) bleeding, and renal failure. It is our belief that stereotactic aspiration is helpful in managing patients with traumatic intracerebral hematoma without herniation and severe brain swelling.
척수내 유피종을 동반한 흉추부의 선천성 피부동 : 증례보고 Case Report
은종필,정남,권창영,장호열 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.4
Congenital dermal sinus(CDS) is a rare entity widely known to occur as a result of the of the failure of the neuroectoderm to separate from the cutaneous ectoderm during the process of neurulation at the third to fifth week of gestation. The lesion can occur at any level of the craniospinal axis. but are located predominantly at the lumbosacral and occipital legion CDS of thoracic region and cervical region are rare The patient with CDS presents with meningitis and/or mass effect from the associated inclusion tumor They ars usually dermoid or epidermoid cyst. Teratoma is rarely associated with CDS. We report our experience of CDS in an 11-month old boy associated with an lntramedullary dermoid tumor at the thoracic region and together we report a review of the literature.
채길성,은종필 대한감염학회 2004 감염과 화학요법 Vol.36 No.2
저자들은 고열, 기면과 경련양 운동을 주소로 내원하여 중증 고나트륨혈증성 탈수와 급성 신부전을 동반한, 면역 기능부전 등의 소견없이 원발성으로 발생한, 생후 15일 남아에서의 뇌국균증을 수술적요법과 항진균제 투여로 치료하였기에 문헌 고찰과 함께 보고하는 바이다. Fungal infection of the central nervous system tends to occur in immunosuppressed patients. In the pediatric population, it is usually seen in severely immunocompromised patients, particulary in children with chronic granulomatous disease, hematopoietic malignancies, and those receiving chemotherapy or corticosteroid therapy. Literature indicates rare survivors from neonatal aspergillosis. We report a case of multiple brain abscess caused by Aspergillus in a 15-day-old male neonate, who had suffered from high fever, generalized seizure, severe dehydration, and azotemia. The patient was immunologically competent and successfully treated with surgical removal and antifungal agents.
자발성 소뇌출혈에서 뇌전산화 단층촬영 소견이 초기 의식 상태와 예후에 미치는 영향
이숭희,정남,권창영,은종필 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.9
The authors analyzed 53 cases with spontaneous intracerebellar hemorrhage diagnosed by brain CT scan and assessed the correlation between the mental status at admission, the outcome and the CT findings. The location of hematoma volume of hematoma quadrigeminal cistern obliteration intraventricular hemorrhage and hydrocephalus were correlated to the mental status assessed by GCS at admission. The GCS score at admission. location of hematoma volume of hematoma quadrigeminal cistern obliteration intraventricular hemorrhage and hydrocephalus were correlated to the outcome. We conclude that decreased GCS score at admission, large volume of hematoma, quadrigeminal cistern obliteration presence of intraventricular hemorrhage and hydrocephalus could be considered as surgical indications and contributing factors for poor prognosis in the patients with spontaneous intracerebellar hemorrhage.