도스또예프스키의 〈백치〉에 나타난 므이쉬낀의 悲劇性 硏究

백준현 한국슬라브유라시아학회 1992 슬라브학보 Vol.7 No.1

Distal Subclavian Artery Occlusion Causing Multiple Cerebral Infarcts Consequence of Retrograde Flow of a Thrombus?

백준현,신동훈,강창기,이영배 대한뇌혈관외과학회 2013 Journal of Cerebrovascular and Endovascular Neuros Vol.15 No.3

Intracranial embolization usually arises from the heart, a vertebrobasilar artery, a carotid artery, or the aorta, but rarely from the distal subclavian artery upstream of an embolus. We report on a patient who experienced left shoulder and forearm pain with weak blood pressure and pulse followed by concurrent onset of left hemiplegia. This case is a rare example of multiple cerebral embolic infarctions, which developed as a complication of distal subclavian artery thrombosis possibly associated with protein S deficiency.

Monitoring of Gamma-ray Bright Quasars 3C279 and 1510-089 at 22, 43 and 86GHz using KVN Single Dish Telescopes

백준현,이상성,변도영,양지혜,한명희,손봉원,Baek, Jun-Hyun,Lee, Sang-Sung,Byun, Do-Young,Yang, Jee-Hye,Han, Myoung-Hee,Sohn, Bong-Won 한국천문학회 2012 天文學會報 Vol.37 No.2

AGN(Active Galactic Nucleus) consists of a supermassive black hole located at its center, an accretion disk around the black hole, and bipolar jets. Since May 2011, we have performed the MOGABA(Monitoring Of GAmma-ray Bright AGN) project for observing gamma-ray bright AGN once a week at multifrequencies using KVN(Korean VLBI Network) 21m radio telescopes. The MOGABA project is the observations for measuring the degree of polarization, polarization angle, and total flux of about 20 AGN at 22, 43 and 86GHz. By this project, we are able to investigate polarization characteristics, spectral index, and variation of rotation measure at radio wavelengths of gamma-ray bright AGN and to study possible relation between gamma-ray flares and magnetic field structure change in AGN. According to previous research, gamma-ray flares of some AGN are coincident with large changes in angle of linear polarization. In this paper we report the preliminary results of linear polarization and total flux at 22, 43, 86GHz of gamma-ray bright quasars 3C279 and 1510-089 showing noticeable variation of total flux at 22GHz in late 2011, and discuss possible correlation with gamma ray light curves.

골다공증에 동반된 척추골절의 골 SPECT 소견

백준현,박영하,인연권,김성훈,정용안,유이령,김지영,정현석,손형선,정수교 大韓核醫學會 2004 핵의학 분자영상 Vol.38 No.6

도스토예프스키의 「어린 영웅」: 첫사랑의 초월과 자아의 발견

백준현 한국러시아문학회 2013 러시아어문학 연구논집 Vol.42 No.-

「The Little Hero」 was written in 1849 when F. M. Dostoevsky was set in a prison of Petropavlovsky fortress prison. It was written in a new and uncharacteristic style to Dostoevsky and deals with a reminiscence of an adult narrator about his childhood first-love. Based on a first-love theme, this story nevertheless deals with it from other point of view. The main goal of Dostoevsky was not to describe the love theme, but to reveal how the 11-year old boy, the protagonist of this story, develops himself, faced with events connected with women, one of whom is m-me M whom he admires, and the other is blonde lady who torments him. In this process, traditional and romantic first-love story is reversed, and the boy becomes consoled by the blonde lady and was disappointed at the changed image of m-me M which he never expected. But he doesn't lose faith in m-me M till the time they part with each other, and thus achieves his own mental growth. To realize such a realistic mental growth of an adolescent which cannot be fully achieved in a traditional romantic way of story-telling, Dostoevsky revised this story in 1860, removing the former preface of romantic tone and thus intensifying the voice of the boy. This work can also be treated as a story, oriented to self-reflection and self-discovery of Dostoevsky himself who didn't lose hope and tried to find his real self in a prison. The image of boy of this story in many respects reminds the adolescent Dostoevsky of 1830-s. Dostoevsky wanted to revive his own adolescent self as a positive model for a new life with optimism and hope, not bounded in a prison.

방사선섬유증에 의한 종괴 : 단순 흉부사진상 종양종괴와의 감별

백준현 대한영상의학회 1996 대한영상의학회지 Vol.34 No.3

신 허혈 및 재관류 손상의 역동적 자기공명영상 소견

백준현,안명임,박영하,정수교 대한영상의학회 2010 대한영상의학회지 Vol.62 No.2

Purpose: To evaluate the usefulness of magnetic resonance imaging (MRI) in a renal ischemia-reperfusion injury. Materials and Methods: Twenty-four rabbits were randomly divided into four groups, including a sham operated group (n=3). Renal ischemia was induced for 30 minutes (group 1), 60 minutes (group 2) and 120 minutes (group 3). MR imaging was performed before ischemia as well as one hour, 24 hours, and 72 hours after reperfusion. A 99mTc-dimercaptosuccinic acid (DMSA) scintigraphy was performed before ischemia, as well as 24 hours and 72 hours after reperfusion. The signal-to-noise ratio (SNR) on the T2WI, time-relative signal intensity (%RSI) curve on dynamic enhanced images, and relative left renal uptake (%) on DMSA scan were obtained and compared to the histologic findings. Results: The SNR of the cortex on the T2WI changed significantly over the course of the reperfusion time (p<0.001), but was not significantly different among the ischemia groups. The area under the time-%RSI curve gradually decreased from cortex to inner medulla before ischemia, which was reversed and gradually increased after reperfusion. The areas under the time-%RSI curve of outer and inner medulla were significantly different among the ischemia groups (p=0.04, p=0.008). The relative renal uptake (%) of left kidney decreased significantly over the reperfusion time (p=0.03), and was also significantly different among the ischemia groups (p=0.005). Tubular cell necrosis was observed in 16 rabbits (76.2%). The histologic grades of group 3 were higher than those of group 1 and group 2 (p=0.002). Even in rabbits without tubular cell necrosis, the areas under the time-%RSI curves of the cortex, outer, and inner medulla after a 72 hour reperfusion time were significantly lower than those before ischemia (p=0.007, p=0.005, p=0.004). Conclusion: The results of this study suggest that dynamic enhanced MR imaging could be a useful tool for the evaluation of renal ischemia and reperfusion injury. 목적: 신 허혈과 재관류 손상 평가에 있어 자기공명영상의 유용성을 알아보고자 하였다. 대상과 방법: 실험군 토끼를 3군으로 분류하고 각 군당 7마리 토끼의 좌 신장을 일시적으로 결찰하여 신 허혈을 발생시킨 후 1군은 30분, 2군은 1시간, 3군은 2시간 후 결찰을 제거하여 재관류를 유발하였다. 자기공명영상은 결찰 전과 재관류 1시간, 24시간, 72시간 후에, 신 피질 스캔은 99mTc-dimercaptosuccinic acid(DMSA)를 이용하여 결찰 전과 재관류 24시간, 72시간 후에 시행하였다. T2 강조 영상과 역동적 조영 증강 영상을 얻었다. T2 강조영상에서의 신호대잡음비, 역동적 자기공명영상에서 시간에 따른 상대신호강도 곡선과 DMSA 스캔에서 상대적 신 섭취비를 분석하였으며, 이를 조직학적인 소견과 비교하였다. 결과: T2 강조 영상에서 피질의 신호대잡음비는 재관류 시간에 따른 변화는 유의하였으나(p < 0.001) 허혈군 간의 차이는 유의하지 않았다. 역동적 자기공명영상에서 상대신호강도 곡선은 재관류 후 정점까지 도달하는 시간이 지연되거나 곡선의 형태가 편평하게 바뀌었으며, 허혈 시간이 길수록 이러한 변화가 뚜렷했다. 재관류 후 역동적 자기공명영상에서 피질의 상대신호강도 곡선 아래 면적보다 수질의 곡선 아래 면적이 더 커져 역전되었으며 시간 경과에 따라 그 정도는 감소하여 회복되는 양상을 보였다. 외수질과 내수질 모두에서 상대신호강도 곡선 아래 면적은 허혈 군에 따라 유의한 차이를 보였다(p=0.04, p=0.008). DMSA 스캔에서 상대적 신섭취비는 허혈군과 재관류 시간에 따른 변화가 유의하였다(p=0.03, p=0.005). 세뇨관 세포의 괴사는 16마리(76.2%)에서 관찰되었다. 3군의 조직학적 등급은 1군이나 2군보다 유의하게 높았다(p=0.002). 조직학적으로 세뇨관 세포의 괴사가 관찰되지 않은 5마리에서도 재관류 72시간 후의 피질, 외수질, 내수질의 상대신호강도곡선 아래 면적은 각각 신동맥 결찰 전보다 유의하게 낮았다(p=0.007, p=0.005, p=0.004). 결론: 역동적 자기공명영상은 신 허혈 및 재관류 손상 평가에 유용할 것으로 생각한다.

도스토예프스키의 관념적 리얼리즘

백준현 한국노어노문학회 1997 한국노어노문학회 학술대회 발표집 Vol.1997 No.4

High-Resolution CT Findings of Re-Expansion Pulmonary Edema

백준현,안명임,박영하,박석희 대한영상의학회 2010 Korean Journal of Radiology Vol.11 No.2

Objective: To describe the high-resolution CT (HRCT) findings of re-expansion pulmonary edema (REPE) following a thoracentesis for a spontaneous pneumothorax. Materials and Methods: HRCT scans from 43 patients who developed REPE immediately after a thoracentesis for treatment of pneumothorax were retrospectively analyzed. The study group consisted of 41 men and two women with a mean age of 34 years. The average time interval between insertion of the drainage tube and HRCT was 8.5 hours (range, 1-24 hours). The patterns and distribution of the lung lesions were analyzed and were assigned one of the following classifications: consolidation, ground-glass opacity (GGO), intralobular interstitial thickening, interlobular septal thickening, thickening of bronchovascular bundles, and nodules. The presence of pleural effusion and contralateral lung involvement was also assessed. Results: Patchy areas of GGO were observed in all 43 patients examined. Consolidation was noted in 22 patients (51%). The geographic distribution of GGO and consolidation was noted in 25 patients (58%). Interlobular septal thickening and intralobular interstitial thickening was noted in 28 patients (65%), respectively. Bronchovascular bundle thickening was seen in 13 patients (30%), whereas ill-defined centrilobular GGO nodules were observed in five patients (12%). The lesions were predominantly peripheral in 38 patients (88%). Of these lesions, gravity-dependent distribution was noted in 23 cases (53%). Bilateral lung involvement was noted in four patients (9%), and a small amount of pleural effusion was seen in seven patients (16%). Conclusion: The HRCT findings of REPE were peripheral patchy areas of GGO that were frequently combined with consolidation as well as interlobular septal and intralobular interstitial thickening. Objective: To describe the high-resolution CT (HRCT) findings of re-expansion pulmonary edema (REPE) following a thoracentesis for a spontaneous pneumothorax. Materials and Methods: HRCT scans from 43 patients who developed REPE immediately after a thoracentesis for treatment of pneumothorax were retrospectively analyzed. The study group consisted of 41 men and two women with a mean age of 34 years. The average time interval between insertion of the drainage tube and HRCT was 8.5 hours (range, 1-24 hours). The patterns and distribution of the lung lesions were analyzed and were assigned one of the following classifications: consolidation, ground-glass opacity (GGO), intralobular interstitial thickening, interlobular septal thickening, thickening of bronchovascular bundles, and nodules. The presence of pleural effusion and contralateral lung involvement was also assessed. Results: Patchy areas of GGO were observed in all 43 patients examined. Consolidation was noted in 22 patients (51%). The geographic distribution of GGO and consolidation was noted in 25 patients (58%). Interlobular septal thickening and intralobular interstitial thickening was noted in 28 patients (65%), respectively. Bronchovascular bundle thickening was seen in 13 patients (30%), whereas ill-defined centrilobular GGO nodules were observed in five patients (12%). The lesions were predominantly peripheral in 38 patients (88%). Of these lesions, gravity-dependent distribution was noted in 23 cases (53%). Bilateral lung involvement was noted in four patients (9%), and a small amount of pleural effusion was seen in seven patients (16%). Conclusion: The HRCT findings of REPE were peripheral patchy areas of GGO that were frequently combined with consolidation as well as interlobular septal and intralobular interstitial thickening.

이산화탄소의 화학적 전환에 의한 폴리카보네이트 및 폴리우레탄의 원료 합성

백준현,Baek, Jun-Hyeon 한국전력공사 2016 KEPCO Journal on electric power and energy Vol.2 No.2

이산화탄소의 화학적 전환기술은 온실가스 저감뿐만 아니라 탄소자원화를 통해 유한한 자원을 대체할 수 있는 기술이다. 다양한 화학반응에 의한 이산화탄소의 전환이 상용화되어 있지만, 대량의 이산화탄소를 자원화하기 위해서는 혁신적인 기술개발이 필요하며 전세계적으로 이에 대한 연구가 활발히 진행되고 있다. 이산화탄소를 직접 분자구조내에 삽입하는 기술 중 고분자 원료물질로 이용되고 있는 Dimethyl carbonate와 Polyol에 대한 제조기술 현황에 대해 소개하였다. RIST에서는 Dimethyl carbonate 제조기술로 urea methanolysis에 의한 촉매 및 공정을 개발하였으며, Polyol의 경우 고유 촉매개발 및 polyol 제품군에 대한 연구를 수행중에 있다. 이들은 분자내에 이산화탄소를 40%이상 포함할 수 있는 화학제품이므로 실용화 성공 시 온실가스 저감에 큰 기여를 할 수 있을 것으로 기대된다. Chemical utilization of $CO_2$ is recognized as the technology for the reduction of greenhouse gas as well as the use of carbon to resources. Although various chemicals are commercially produced, the innovative development is still necessary to utilize large quantity of $CO_2$. In this report, the current status of technology to preserve -CO-O- linkage into the molecules was introduced, particularly for the synthesis of dimethyl carbonate (DMC) and polyols, which are raw materials of polycarbonate and polyurethane, respectively. RIST developed the novel process for the DMC production via urea methanolysis and the new catalytic system for polyol synthesis. Because of high contents of $CO_2$ in both chemicals, it is expected that they are able to contribute for the reduction of greenhouse gas.