치명적인 Amiodarone 폐독성 4예

이승우,이상학,여동승,이숙영,김석찬,김관형,문화식,송정섭,박성학,정은선,Lee, Seung-Woo,Lee, Sang-Haak,Yeo, Dong-Seung,Lee, Sook-Young,Lee, Seok-Chan,Kim, Kwan-Hyoung,Moon, Hwa-Sik,Song, Jeong-Sup,Park, Sung-Hak,Jung, Eun-Sun 대한결핵및호흡기학회 2002 Tuberculosis and Respiratory Diseases Vol.53 No.6

The lungs are frequently the site of adverse drug reactions because of their higher oxygen concentration, the distinctive properties of the pulmonary circulation, and the close proximity of the alveolar epithelium to the blood. Amiodarone, an iodinated benzofuran derivative, is an effective antiarrhythmic drug commonly used for refractory tachyarrhythmia. However, it has a wide range of adverse effects, the most serious of which is lung disease. Most patients present with the insidious onset of dyspnea and a nonproductive cough, and generally recover after withdrawing the drug. We recently experienced four fatal cases of amiodarone pulmonary toxicity. Therefore, we discuss these unusual drug-induced pulmonary toxicity cases with a review of the relevant literature.

선천성 혈관외피 세포종 1예

이승우,이성,임근우,김재성,오창규,양만규,서은주 ( Seung Woo Lee,Seong Lee,Keun Woo Lim,Jae Sung Kim,Chang Kyu Oh,Man Kyu Yang,Eun Joo Seo ) 대한소화기학회 1992 대한소화기학회지 Vol.24 No.5

Hemangiopericytoma is a rare but ubiquitous mesenchymal tumor first described by Stout and Murray in 1942. It arises from the pericyte of Zimmerman, the rudimentary contractile cells found adjacent to the capillary wall throughout the body. The diagnosis can be made only by histologic examination and the treatment mainly comprises wide surgical excision. This paper presents one case of congenital hemangiopericytoma in small intestine experienced at St. Paul's hospital of Seoul.

만성신부전 환자에서 혈액투석 후의 안압 및 맥락막두께의 변화

전준우, 이승우Jun Woo Chun MD Seung Woo Lee MD 대한안과학회 2013 대한안과학회지 Vol.54 No.5

Purpose: To evaluate the change of choroidal thickness and intraocular pressure (IOP) as a result of hemodialysis with chronic renal failure patients. In addition, the correlation between the change of choroidal thickness and IOP were evaluated. Methods: A total of 48 eyes of 48 chronic renal failure patients undergoing hemodialysis were included in the present study. IOP, blood pressure (systolic and diastolic), serum osmolality, central corneal thickness (CCT), and choroidal thickness were measured before and after hemodialysis. Choroidal thickness was measured using spectral domain ocular coherence tomography (SD-OCT). Results: After hemodialysis, IOP significantly decreased from 14.9 ± 2.3 mm Hg to 14.3 ± 2.1 mm Hg (p < 0.001) and choroidal thickness significantly decreased from 352.2 ± 31.6 μm to 306.6 ± 29.0 μm (p < 0.001). The other factors that significantly decreased after hemodialysis included serum osmolality (p < 0.001) and blood pressure (p < 0.001) except CCT (p = 0.285). There was a positive correlation between changes in IOP and choroidal thickness after hemodialysis (r = 0.319, p = 0.027). Conclusions: Decreased choroidal volume and thickness due to fluid loss may be involved in the mechanism of decreased IOP during hemodialysis. J Korean Ophthalmol Soc

유리체절제술과 백내장 동시수술 시 모양체고랑 인공수정체 삽입술 후의 굴절이상값

장재호, 이승우Jae Ho Jang MD Seung Woo Lee MD 대한안과학회 2014 대한안과학회지 Vol.55 No.4

Purpose: To evaluate the difference between the predicted postoperative refraction and the actual postoperative refraction after simultaneous vitrectomy and cataract surgery with sulcus fixation of an intraocular lens (IOL). Methods: The records of patients with simultaneous vitrectomy and cataract surgery with sulcus IOL implantation (group 1) and with in-the-bag IOL implantation (group 2) were reviewed. We compared the spread between the predicted and actual refractive errors in the two groups. Results: Group 1 consisted of 19 eyes in 19 patients and group 2 consisted of 23 eyes in 20 patients. The spread between the predicted and actual refraction (spread = actual-predicted) was -0.71 ± 1.02 D in group 1 (<em>p</em> = 0.012) and -0.07 ± 0.74 D in the group 2 (<em>p</em> = 0.86). The actual refractive errors in group 1 shifted toward myopia from the predicted in-the-bag refraction when compared with group 2. Conclusions: For the implantation of an IOL in the sulcus after simultaneous vitrectomy and cataract surgery, the IOL power should be approximately 1.0 D less than the power for in-the-bag fixation. J Korean Ophthalmol Soc 2014;55(4):513-518

수중 음향 환경에서의 영상 전송 성능 비교분석

이승우,Lee, Seung-Woo 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.3

Underwater acoustic(UWA) communication is one of the most difficult field in terms of severe channel environments such as multipath propagation, high temporal and spatial variability of channel conditions. Therefore, it is important to model and analyze the characteristics of underwater acoustic channel such as multipath propagation, transmission loss, reverberation, and ambient noise. In this paper, UWA communication channel is modeled with a ray tracing method and applied to image transmission. Quadrature phase shift keying(QPSK) and multichannel decision feedback equalizer(DFE) are utilized as phase-coherent modulation method and equalization technique, respectively. The objective is to improve the performance of the image transmission using vertical sensor array instead of single sensor in the viewpoint of bit error rate(BER), constellation diagram, and received image quality.

컴퓨터프로그래밍과 관련된 교과목 내용분석

이승우,Lee, Seung-Woo 한국수학사학회 2009 Journal for history of mathematics Vol.22 No.2

The computer programming is a useful tool to cultivate the logical thinking and encourage the problem solving competence. With the purpose of specifying the computer programming, this study mainly concerns with what the computer programming is in the Math/Stat education, and the role of the computer programming when it regards the problem solving procedure. This provides the possibility of Math/Stat major to be specified with the connection of IT related courses, and eventually the specified Math/Stat major enables more qualified graduates to be educated.

소프트웨어와 하드웨어 교육과정에서 수학/통계를 연계한 실증연구

이승우,Lee, Seung-Woo 한국데이터정보과학회 2010 한국데이터정보과학회지 Vol.21 No.4

This paper shows that mathematics and statistics are not only a necessity but a strategic element in contributing for the competitiveness of field of S/W and H/W. First, a survey was conducted to investigate the perceived importance of mathematics and statistics to the specialists of the field. Second, computer programming was implemented in university mathematics courses to understand the educational effect related to problem solving ability. Third, a educational case in which mathematics and statistics in S/W and H/W subject were combined was analyzed. Lastly, an effective plan for mathematics and statistics education in the field of S/W and H/W will be presented.

소프트웨어분야에서 수학 교과목의 역할

이승우,Lee, Seung-Woo 한국수학사학회 2008 Journal for history of mathematics Vol.21 No.2

This paper concerns with the roles of mathematics, that is, mathematics as its own roles and importance, and mathematics as the fundamentals of the software related fields. This paper also introduces the corelation between the mathematics and the software-related fields, using diagrams that show the different tracks of credit completion depending on the majors in the software-related fields.

하드웨어 전공자들의 수학 관련 교과목 학업성취도 제고 방안

이승우,Lee, Seung-Woo 한국데이터정보과학회 2015 한국데이터정보과학회지 Vol.26 No.4

The purpose of this study is to increase the interest in mathematics-related curriculum and improve mathematics academic achievement of H/W majors. Firstly, this paper proposes the educational case study that develops the learner's ability, increases the interest and raises the employment rate in the unfavorable mathematics-related fields for the H/W majors. Secondly, this paper presents the future teaching method on mathematics-related curriculum that applies to the actually teaching-learning based on the computer programming in the field of the H/W. Lastly, this paper suggests the promising pedagogical method for mathematics by using the statistical analyses of academic achievements and surveys in order to present the effective conducting method of mathematics education.

평활 방법론이 적용될 수 있는 컴퓨터-소프트웨어 교육분야 제안

이승우,Lee Seung-Woo 한국수학사학회 2006 Journal for history of mathematics Vol.19 No.3

본 논문에서는 오늘날 관심의 대상이 되고 있는 평활에 관한 수학적 배경, 통계적 방법론, 그리고 평활방법론이 적용될 수 있는 컴퓨터-소프트웨어 교육분야에 관하여 조사하고 논하고자 한다. 뿐만 아니라 수학과 통계를 기반으로 히스토그램, 커널밀도추정량, 적응커널추정량, 띠너비선택방법에 관한 개념과 방법론을 소개하고자한다.