과전류 보호계전기용 광섬유 전류센서

송민호,양창순,안성준,박병석,이병호 한국비파괴검사학회 2001 한국비파괴검사학회지 Vol.21 No.5

과전류 보호계전기에 사용할 목적으로 광섬유를 센서헤드로 사용하는 광 전류센서를 구성하였다. 전류측정의 원리는 도체 주변에 감겨진 광섬유 코일을 따라 광신호의 선형편광축이 자기장에 의하여 회전하는 정도를 측정하여 이로부터 전류의 값을 산출하는 편광측정 방법이 사용되었다. 센서코일은 10/125 mm 규격의 일반 통신용 광섬유를 미터당 20회전 이상 비틀어 제작하여 온도나진동 등의 환경적 영향을 최소화하였다. 코일의 한쪽 끝은 Faraday Rotator Mirror를 장착한 반사형으로 설계하여 계통을 해체하지 않은 상태에서도 센서의 탈×부착이 가능하고 코일의 회전수에 따라 센서의 민감도 조절이 용이하며 폐회로형 구조이므로 인근 신호원에 의한 간섭을 차단할 수 있다. 편광 빛가르개 등을 이용한 광학 신호처리부를 구성하고 표준 전류원을 이용한 전류측정 실험을 수행한 결과로 이론적인 해석과 동일한 형태의 출력을 얻을 수 있었다. 본 논문에서는 구성한 광 전류센서의 이론적 모델을 기술하고 전류측정 실험의 결과와 이론치에 대하여 비교 분석한다. A robust, accurate, broad-band, alternating current sensor using fiber-optics is being developed as a part of optical over current protection relay system. The sensor uses the Faraday effect in optical fiber and polarimetric measurements to sense electrical current. The current sensing coil consists of a length of twisted optical fiber and Faraday rotator mirror to suppress the linear birefringence effect. Due to its single-ended closed path structure, it can not only be easily installed to the target with great isolation from other fields in the vicinity, but the sensitivity can be increased by using multiple turns. This paper reports on the theoretical backgrounds of the sensor design and the preliminary experimental results.

건설 PMIS 실태와 건설 CALS 연계 및 확산방안에 관한 연구

송병관,박영호,백준홍 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

This study has aimed for wide spreading of CALS in Construction Industry. The PMIS produce original information of construction project linked to CALS. So, this study have investigated present state of PMIS in construction industry, and reviewed the interface to construction CALS. And, key issues of adopting PMIS & CALS to whole construction and its related industry have been found. Additionally, it has also found improvement issues of construction system and political supports for PMIS adoption.

족관절 내과골절에서 피질골 나사못을 이용한 변형된 긴장대 고정술

최호림,도현우,김병흠,김규현,박종석,송준민 대한골절학회 2004 대한골절학회지 Vol.17 No.4

목적 : 전위된 족관절 내과골절에 대해 피질골 나사못을 이용한 변형된 긴장대 고정술을 이용한 치료결과를 분석해 보고자 하였다. 대상 및 방법 : 2001년 1월부터 2003년 1월까지 전위된 내과골절에 대해 변형된 긴장대 고정술을 시행 받고 최소 1년 이상 추시관찰 가능 하였던 24례를 대상으로 하였다. 남자 13례, 여자 11례로 평균 연령은 46세였다. 골절은 Lauge-Hansen 분류법을 사용하였으며, 결과는 Meyer와 Kumler의 평가 방법을 이용하였다. 결과 : 13례 (54%)에서 우수의 결과를 얻었고, 9례 (38%)에서 양호의 결과를 얻었으며, 운동범위의 제한이 발생한 1례에서 보통, 후외상성 관절염이 발생한 1례에서 불량의 결과를 얻었다. 결론 : 전위된 족관절 내과골절에서 피질골 나사못을 이용한 변형된 긴장대 고정술은 견고한 내고정과 조기 관절 운동이 가능한 효과적인 수술 방법이 될 수 있을 것으로 사료된다. Purpose : To evaluate the clinical results of modified tension band wire technique using cortical screw for treatment of displaced medial malleolar fractures of the ankle. Materials and Methods : From January 2001 to January 2003, 24 patients were treated by modified tension band wiring using cortical screw for medial malleolar fracture. The follow-up period was 12~35 months (average 18 months). There were 13 males and 11 females, and the mean age was 46 years. Fractures were classified by Lauge-Hansen's classification. The results were analyzed by Meyer and Kumler's criteria. Results : There were 13 cases (54%) of excellent, 9 cases (38%) of good, and one case of fair because of limitation of motion of the ankle joint and one case of poor which showed post-traumatic arthritis of the ankle. Conclusion : Modified tension band wire technique using cortical screw can be an effective operative method for the treatment of displaced medial malleolar fractures of the ankle.

STRUCTURE , MULTIPLE REGULATIONS AND CLINICAL ASPECTS OF CYTOCHROME P450ⅡE1 INDUCIBLE BY ETHANOL

Byoung Joon Song 생화학분자생물학회 1990 90년도 학술대회 초록 Vol.- No.-

Efficiency Calibration of HPGe Detector in Normal ana Coincidence Mode for the Determination of Prompt Gamma-ray

Byoung-Chul Song,Yong-Joon Park,Kwang-Yong Jee 한국방사성폐기물학회 2004 방사성폐기물학회지 Vol.2 No.2

NIPS 시스템은 중성자 핵반응 결과 방출되는 즉발 감마선을 정량적으로 측정하는 장치이며 고체 및 액체 폐기물 중 존재하는 다양한 원소를 비파괴적으로 분석할 수 있는 장점이 있다. 본 연구에서는 NIPS 시스템에 이용된 고순도반도체 검출기의 계측효율을 Ba 및 Eu 방사성 동위원소 선원과 Cl(n, ) Cl 핵반응 시 발생되는 즉발감마선을 이용하여 80 keV에서 8 MeV까지 넓은 영역에 대하여 구하였다. Cl(n, ) Cl 핵반응을 이용한 고에너지 감마선의 계측효율은 즉발감마선의 방사능 값을 정확히 알 수 없기 때문에 저 에너지 영역에서 정확히 알고 있는 검출기 효율곡선에 규격화시켜 전 에너지 영역에서의 효율보정곡선을 구하였다. 또한 KCl 표준용액에 Cf 중성자 선원을 조사시켜 표준용액으로부터 방출되는 즉발 감마선을 고순도반도체 검출기로 측정하고 광대역 계측효율 곡선을 이용하여 수용액 시료에서의 평균 열중성자 속을 예측하였다. NIPS 측정시스템은 주변 재료 물질의 핵반응으로 방출되는 감마선 background를 줄이기 위해 두 개의 고순도반도체 검출기를 이용한 동시계수 장치가 고안되었으며, 동시계수 모드에서의 계측효율도 함께 고려되었으며, 표준선원을 이용하여 전 계수 또는 동시계수모드에서의 background에 대한 측정감도를 비교하였다.다. Neutron induced prompt gamma-ray spectroscopy(NIPS) system measures the prompt gamma-ray emitting by the interaction of a neutron with various materials. This system will be of great benefit to scientists worldwide, since it provides the non-destructive measurement of many element in either solid or liquid wastes. In this study, the full-energy-peak (FEP) efficiency calibration for a HPGe detector was constructed in the -ray energy range from 80 keV to 8 MeV, using Ba and >TEX>$^{152}Eu$ RI sources and $ ^{35}Cl(n, )^{36}Cl$ thermal neutron captured reaction. The FEP efficiency curve for the higher energies using the $^{35}Cl(n, )^{36}Cl$ reaction was normalized with the curve obtained from the RI sources, since the accurate activity of its prompt -ray is unknown. The average thermal neutron flux was theoretically calculated using the FEP efficiency curve for the KCl standard solutions. The NIPS system equipped with a - coincidence setup with two n-type coaxial HPGe detectors was considered in order to reduce the interfering -ray background. The FEP efficiency curve for the - coincidence system was also obtained for full energy range. The performance of the normal and coincidence NIPS system was tested by comparing signal-to-noise ratio in each mode using the reference sample.e.

Serum allergen-specific and total IgE concentrations in dogs with allergic disorders in South Korea

Byoung-Gook Yoon,Han-Joon Lee,Kun-Ho Song 한국동물위생학회 2023 韓國家畜衛生學會誌 Vol.46 No.3

Canine atopic dermatitis (CAD) has a genetic basis and is primarily a skin disorder characterized by allergic features. It is caused by an excessive immune response, associated with immunoglobulin E (IgE), to allergens and shows clinical signs of itching and inflammation. The present study evaluated the allergen-specific and total IgE concentration in dogs with allergic disorders. Allergen-specific IgE analysis was performed using a Multiple Allergen Simultaneous Test (MAST) assay, and total IgE analysis was conducted using an ELISA in 82 dogs with CAD. The subjects were divided into two groups: dogs aged ≤3 years and dogs aged >3 years, enabling a comparison of total IgE concentrations between the two age groups. The results showed that the major affecting environmental allergen was Alternaria alternate , and the major affecting dietary allergen was raw chestnut. The results revealed that dogs aged ≤3 years had higher total IgE concentrations than dogs aged >3 years with significant difference. The results of this study can contribute to the diagnosis and treatment of CAD in South Korea.

Effects of Naloxone on Cerebral Blood Flow in the Induced Subarachn oid Hemorrhage in Cat

Song, Jin Un,Park, Chun Kun,Kang, Joon Ki,Youn, Suck Hoon,Cho, Byoung Il,Kim, Dal Soo,Kim, Moon Chan,Baik, Min Woo CATHOLIC MEDICAL CENTER 1986 Bulletin of the Clinical Research Institute Vol.14 No.1

This research was planned to observe the acute change of regional cerebral blood flow (rCBF) in experimentally induced subarachnoid hemorrhage in cat, to investigate whether endogenous opiate plays a role in the mechanism of the acute reduction in cerebral blood flow following subarachoid hemorrhage, and to document the therapeutic value of naloxone in the treatment of subarachnoid hemorrhage. Induction of subarachnoid hemorrhage result in a significant reduction of cerebral blood flow (CBF) (P<0.005). Administration of naloxone (10㎎/㎏) made the reduced cerebral blood flow following subarachnoid hemorrhage increase to normal level (P<0.05). At that time naloxone did not have any significant effect on intracranial pressure and blood pressure in comparison with the naloxone treated control group. These data suggest that endogenous opiate can play an important role in the mechanism of the acute reduction in cerebral blood flow following subarachnoid hemorrhage and naloxone, opiate antagonist, may induce increase in cerebral blood flow by reversing the effects of endogenous opiate and its direct cerebral vasodilator properties.

Predictive Factors for Switched EGFR-TKI Retreatment in Patients with EGFR-Mutant Non-Small Cell Lung Cancer

( Byoung Soo Kwon ),( Ji Hyun Park ),( Woo Sung Kim ),( Joon Seon Song ),( Chang-min Choi ),( Jin Kyung Rho ),( Jae Cheol Lee ) 대한결핵 및 호흡기학회 2017 Tuberculosis and Respiratory Diseases Vol.80 No.2

Background: Third-generation tyrosine kinase inhibitors of the epidermal growth factor receptor (EGFR-TKIs) have proved efficacious in treating non-small cell lung cancer (NSCLC) patients with acquired resistance resulting from the T790M mutation. However, since almost 50% patients with the acquired resistance do not harbor the T790M mutation, retreatment with first- or second-generation EGFR-TKIs may be a more viable therapeutic option. Here, we identified positive response predictors to retreatment, in patients who switched to a different EGFR-TKI, following initial treatment failure. Methods: This study retrospectively reviewed the medical records of 42 NSCLC patients with EGFR mutations, whose cancers had progressed following initial treatment with gefitinib or erlotinib, and who had switched to a different firstgeneration EGFR-TKI during subsequent retreatment. To identify high response rate predictors in the changed EGFR-TKI retreatment, we analyzed the relationship between clinical and demographic parameters, and positive clinical outcomes, following retreatment with EGFR-TKI. Results: Overall, 30 (71.4%) patients received gefitinib and 12 (28.6%) patients received erlotinib as their first EGFR-TKI treatment. Following retreatment with a different EGFR-TKI, the overall response and disease control rates were 21.4% and 64.3%, respectively. There was no significant association between their overall responses. The median progressionfree survival (PFS) after retreatment was 2.0 months. However, PFS was significantly longer in patients whose time to progression was ≥10 months following initial EGFR-TKI treatment, who had a mutation of exon 19, or whose treatment interval was <90 days. Conclusion: In patients with acquired resistance to initial EGFR-TKI therapy, switched EGFR-TKI retreatment may be a salvage therapy for individuals possessing positive retreatment response predictors.

Study in Background Reduction for the Neutron Induced Prompt Gamma-ray Spectroscopy

Byoung Chul Song,Kwang Yong Jee,Yong Joon Park 한국방사성폐기물학회 2004 한국방사성폐기물학회 학술논문요약집 Vol.2 No.1

라플라스 변환과 유한요소법의 결합에 의한 확산방정식의 해석

송병철(Byoung-Chul Song),이준호(Joon-Ho Lee),이기식(Ki-Sik Lee) 한국자기학회 1998 韓國磁氣學會誌 Vol.8 No.3

In this paper, a algorithm is proposed, which is applicable to the transient analysis of diffusion equations by combined use of the Laplace transform and the finite element method. The proposed method removes the time terms using the Laplace transform and then solves the associated equation with the finite element method. The solution which is solved at frequency domain is transformed into time domain by use of the Laplace inversion. To verify the proposed algorithm, a heat conduction problem is analysed. And the solution showed a good agreement with analytic solution. Because the time-step method is not needed, the proposed method is very useful in solving various kinds of diffusion equations.