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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
Amiodarone 폐독성은 약제 복용력이 있는 환자에서 새로운 증상과 X-선의 변화가 있을 때 의심하여야 하며 울혈성 심부전이나 폐감염증, 폐색전증, 악성종양 등과 감별하는 것이 중요하다. 진단은 임상적, 방사선학적, 조직학적 소견을 종합하여 내릴 수 있으며 대부분의 경우에는 약제 중단을 통해서 폐독성의 호전을 기대할 수 있으나 일부에서는 호흡부전으로 진행하거나 기존의 심부정맥의 재발 등으로 인하여 사망하는 경우도 있다. 저자들은 심부정맥으로 amiodarone을 사용하던 환자에서 치명적인 폐독성이 발생한 4예를 경험하였기에 이를 문헌고찰과 함께 보고하는 바이다. 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.
공작기계 핵심부품의 신뢰성 평가 ${\cdot}$ 분석에 관한 연구
이승우,송준엽,이화기,Lee, Seung-Woo,Song, Jun-Yeob,Lee, Hwa-Ki 한국신뢰성학회 2003 신뢰성응용연구 Vol.3 No.1
Recently, the reliability evaluation and analysis are applied for many industrial products, and many products are required to guarantee in quality and in efficiency. The purpose of this paper is to present some of reliability prediction methodologies that are applicable to machine tools. Especially ATC (Automatic Tool Changer) and Interface Card of PC-NC, which are core components of the machine tools, were chosen as the target of the reliability evaluation and analysis. The results of this research has shown the failure rate, MTBF(Mean Time Between Failure), and reliability for those components. It is expected that proposed methodologies will be applicable to evaluation of reliability for other industrial products.
이승우,이혁수,윤경모,이용기,엄진섭,Yi, Seung- Woo,Lee, Hyuk-Su,Yoon, Kyeong-Mo,Lee, Yong-Gi,Eom, Jin-Seob 한국통신학회 2002 韓國通信學會論文誌 Vol.27 No.8B
일반적으로 10GHz이상의 초고속 전송에서는 전송 성능면에서 RZ 형태가 NRZ 형태보다 우수하다고 알려져 있다. 본 연구에서는 광섬유 루프미러내의 편광제어기를 이용하여 SOA에서의 XPM을 조절할 수 있는 RZ 데이터를 위한 파장변환기를 제안하였으며, 이의 시뮬레이션을 수행하여 출력을 예측하였고, 10Gbps RZ 데이터에 대한 실험을 통해 이를 확인하였다. 제안된 구조는 기존의 XPM 구조에 비하여 보다 저가의 편광 의존형 SOA를 하나만 필요로 하며, 입력 데이터에 대해 반전 및 비반전된 파장변환 출력신호를 두개의 출력에서 동시에 얻을 수 있는 장점이 있다. Generally, it is announced that RZ pattern gives a better transmission performance than NRZ pattern in ultra-high speed transmission above 10Gbps. In this paper, we propose a wavelength converter for RZ data which can controls XPM in SOA by locating polarization controllers within optical fiber loop mirror and demonstrate its performance through simulation and 10Gbps data experiment. The proposed structure needs only one polarization dependent SOA for implementation compared to previous XPM ones to make the cost down. And it provides non-inverted pattern outputs at two output ports respectively.
인구통계학적 요인 및 나트륨 섭취와 건강관련 삶의 질 간의 연관성: 경주지역 성인을 중심으로
이승우,황지윤,김인선,이수진,정경식,고광필,백영화,Lee, Seung-Woo,Hwang, Ji-Yun,Kim, In Seon,Lee, Sujin,Jeong, Kyungsik,Ko, Kwang-Pil,Beak, Younghwa 한국식생활문화학회 2021 韓國食生活文化學會誌 Vol.36 No.1
Sodium intake has been associated with the health-related quality of life (HRQoL). This study examined the demographic factors related to HRQoL and whether there is an association between sodium intake and HRQoL in adults residing in rural areas. A total of 1,980 adults (aged ≥20 years) were selected from a cross-sectional study conducted between December 2013 and February 2014 in Gyeongju, South Korea. The sodium intake and HRQoL were measured using a validated food frequency questionnaire and the EuroQol Five-Dimension (EQ-5D) (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression), respectively. The education levels (<5 years) were inversely associated with all five dimensions of HRQoL. Men had better EQ-5D scores for each of the five components examined. Adults living with spouses had better scores related to usual activities and anxiety/depression, whereas widowers had decreased scores of mobility and self-care. Unlike older adults aged 70-79 years, adults aged <60 years were more likely to have greater scores related to mobility, usual activities, and pain/discomfort. The income levels were also inversely related to the scores for self-care, usual activities, pain/discomfort, and anxiety/depression. Sodium intake was positively associated with the HRQoL related to self-care, usual activities, and pain/discomfort, but it was negatively associated with anxiety/depression. In conclusion, these findings suggest that the demographic factors and sodium intake were independently associated with HRQoL. The results highlight the need to provide tailored, targeted policies and interventions that consider personal characteristics and dietary intake to improve the overall HRQoL in adults residing in rural areas.
탄소나노튜브 전자 필름을 이용한 고감도-고선택성 전기화학 글루코스 센서
이승우,이동욱,서병관,Lee, Seung-Woo,Lee, Dongwook,Seo, Byeong-Gwuan 한국공업화학회 2022 공업화학 Vol.33 No.2
This work presents a non-destructive and straightforward approach to assemble a large-scale conductive electronic film made of a pre-treated single-walled carbon nanotube (SWCNT) solution. For effective electron transfer between the immobilized enzyme and SWCNT electronic film, we optimized the pre-treatment step of SWCNT with p-terphenyl-4,4"-dithiol and dithiothreitol. Glucose oxidase (GOx, a model enzyme in this study) was immobilized on the SWCNT electronic film following the positively charged polyelectrolyte layer deposition. The glucose detection was realized through effective electron transfer between the immobilized GOx and SWCNT electronic film at the negative potential value (-0.45 V vs. Ag/AgCl). The SWCNT electronic film-based glucose biosensor exhibited a sensitivity of 98 ㎂/mM·cm<sup>2</sup>. In addition, the SWCNT electronic film biosensor showed the excellent selectivity (less than 4 % change) against a variety of redox-active interfering substances, such as ascorbic acid, uric acid, dopamine, and acetaminophen, by avoiding co-oxidation of the interfering substances at the negative potential value.
영수보사(迎隨補瀉) 침자극(鍼刺戟)이 경혈영역(經穴領域)의 온도변화(溫度變化)에 미치는 영향(影響)
이승우,이정훈,송범용,육태한,Lee, Seung-woo,Lee, Jeoung-hoon,Song, Beom-Yong,Yook, Tae-han 대한침구의학회 2001 대한침구의학회지 Vol.18 No.2
Purpose : This study is to see the existence of the meridian and the meridian point through their response to the Young-Su-Bo-Sa. Objective and Methods : For this purpose, with acupuncture stimulation with Young-Su-Bo-Sa on the Hapkok of left hand and an the non-meridian point, and using the Digital infrared thermal image(D.I.T.I), We observed and analyzed the thermal changes of Hapkok, Samgan, non-meridian point(NA), Yonghyang, Soryo, Chonchu, Shingwol. Results and Conclusions : To sum up, We could understand Young-Su-Bo-Sa stimulation through the study findings that the acupuncture stimulation on the meridian point caused significant thermal changes of the associated meridian and meridian point, and Young-Su-Bo stimulation given in the direction of the meridian passage caused increases in the thermal changes of the associated meridian point, while Young-Su-Sa stimulation caused decreases in the thermal changes of the associated meridian point.