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Plasma level of Fas ligand is associated with severity of sepsis
( Hongseok Yoo ),( Kyeongman Jeon ),( Jin Young Lee ),( June Sun Park ),( Gee Young Suh ) 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.-
Purpose: Cell death mechanisms is known to play an important role in pathogenesis of sepsis. Fas ligand is a potent inducer of both apoptosis and necroptosis. However, there is only few data on the association between plasma level of Fas ligand and severity and mortality of sepsis. Furthermore, relationship between Fas ligand and receptor-interacting protein kinase-3 (RIPK3), a well-known necroptosis mediator, is not known. Methods: We performed a prospective study on patients admitted to the medical intensive care unit (ICU) of Samsung Medical Center from 2014 to 2017. Plasma level of Fas ligand was measured on the day of ICU admission and hospital days 3 and 7. Plasma level of Fas ligand was compared among groups of patients with no evidence of sepsis, sepsis, and septic shock. The relationship between plasma level of Fas ligand and RIPK3 was analyzed by linear regression method. Results: Of 256 study patients, 61 (24%) patients were diagnosed with sepsis and 84 (33%) with septic shock. When plasma level of Fas ligand was compared among patients, there was a trend of increase across the groups of control, sepsis, and septic shock (37.0 pg/mL vs. 78.0 pg/mL vs. 102.5 pg/mL, P < 0.001). Patients with higher plasma level of Fas ligand had higher SOFA and SAPS 3 scores. Septic shock was more common in patients with higher plasma level of Fas ligand. However, there was no difference in 28-day ICU mortality or in-hospital mortality. There was correlation between plasma level of Fas ligand and RIPK3 (r2 = 0.045, P < 0.001). The plasma levels of Fas ligand on day 3 and day 7 were 10.75 (52.5 - 160.0) and 30.0 (19.0 - 67.5), respectively. Conclusion: Plasma level of Fas ligand was associated with severity of sepsis and plasma level of RIPK3, however; not predictive of mortality.
Yoo, Hongseok,Gu, Se Hun,Jung, Jaehun,Song, Dong Hyun,Yoon, Changgyo,Hong, Duck Jin,Lee, Eun Young,Seog, Woong,Hwang, Il-Ung,Lee, Daesang,Jeong, Seong Tae,Huh, Kyungmin Centers for Disease Control and Prevention 2017 Emerging infectious diseases Vol.23 No.6
<P>An outbreak of febrile respiratory illness associated with human adenovirus (HAdV) occurred in the South Korea military during the 2014–15 influenza season and thereafter. Molecular typing and phylogenetic analysis of patient samples identified HAdV type 55 as the causative agent. Emergence of this novel HAdV necessitates continued surveillance in military and civilian populations.</P>
A New Interference-Aware Dynamic Safety Interval Protocol for Vehicular Networks
Hongseok Yoo(유홍석),Chu Seock Chang(장주석),Dongkyun Kim(김동균) 한국산업정보학회 2014 한국산업정보학회논문지 Vol.19 No.2
In IEEE 802.11p/1609-based vehicular networks, vehicles are allowed to exchange safety and control messages only within time periods, called control channel (CCH) interval, which are scheduled periodically. Currently, the length of the CCH interval is set to the fixed value (i.e. 50ms). However, the fixed-length intervals cannot be effective for dynamically changing traffic load. Hence, some protocols have been recently proposed to support variable-length CCH intervals in order to improve channel utilization. In existing protocols, the CCH interval is subdivided into safety and non-safety intervals, and the length of each interval is dynamically adjusted to accommodate the estimated traffic load. However, they do not consider the presence of hidden nodes. Consequently, messages transmitted in each interval are likely to overlap with simultaneous transmissions (i.e. interference) from hidden nodes. Particularly, life-critical safety messages which are exchanged within the safety interval can be unreliably delivered due to such interference, which deteriorates QoS of safety applications such as cooperative collision warning. In this paper, we therefore propose a new interference-aware Dynamic Safety Interval (DSI) protocol. DSI calculates the number of vehicles sharing the channel with the consideration of hidden nodes. The safety interval is derived based on the measured number of vehicles. From simulation study using the ns-2, we verified that DSI outperforms the existing protocols in terms of various metrics such as broadcast delivery ration, collision probability and safety message delay.
유홍석(Hongseok Yoo),김지원(Ji-Won Kim),황종욱(Jong-Wook Hwang),박태원(Tae-Won Park),이준희(Jun-Hee Lee) 한국컴퓨터정보학회 2021 한국컴퓨터정보학회 학술발표논문집 Vol.29 No.2
본 논문에서는 사용자에게 편의성을 제공하며 기존 물물거래 시스템의 단점을 보완한 웹기반의 물물교환 시스템을 제안한다. 대부분 사람들이 중고거래나 필요 없는 물품에 대해 판매를 하는 목적은 자신에게 필요 없는 물건을 처리하고 필요한 물건을 구매하기 위해서이다. 이러한 사용자들의 관점에서 보았을 때, 필요한 물건을 얻기까지의 과정이 장시간 걸린다는 단점이 있으며, 사람들이 필요 없는 물건을 버려 낭비되고 과 소비되는 경우도 있다. 이러한 문제를 해결해서 필요 없는 물건을 필요로 하는 사람과 물물교환을 하여 불필요한 소비를 줄이고 필요한 제품을 서로 쉽게 찾고 교환할 수 있도록 사용자에게 편의성을 제공하는 물물교환 시스템을 제안한다.
특발성 폐섬유증 및 진행성 폐섬유증의 최신 진료 지침 소개
유홍석 ( Hongseok Yoo ) 대한내과학회 2023 대한내과학회지 Vol.98 No.2
Idiopathic pulmonary fibrosis (IPF) is the most common and fatal idiopathic interstitial pneumonia and is characterized by chronic progressive pulmonary fibrosis of indeterminate etiology. In 2018, the American Thoracic Society, European Respiratory Society, Japanese Respiratory Society, and Latin American Thoracic Society published joint clinical practice guidelines for IPF. The guidelines require exclusion of known causes of interstitial lung disease and identification of a radiological and/or pathologic pattern of usual interstitial pneumonia (UIP). The diagnosis of IPF is a multidisciplinary process, involving pulmonologists, radiologists, pathologists and, if necessary, experts in other medical fields. The 2022 guidelines for IPF revisit and clarify the radiological and pathological features of UIP. In addition, recommendations regarding transbronchial lung cryobiopsy, antacid medication, and antireflux surgery are revised or established based on up-to-date evidence in the 2022 guidelines. The new guidelines also encompass the definition and treatment of progressive pulmonary fibrosis (PPF). PPF comprises diverse fibrotic interstitial lung diseases other than IPF, which progress despite standard treatment. The diagnosis of PPF is based on symptoms, physiologic evidence, and radiologic evidence of progression. The use of nintedanib was suggested for patients with PPF other than IPF who are unresponsive to standard treatment. This review introduces and discusses the recommendations for the diagnosis and treatment of IPF and PPF in the new international guidelines. (Korean J Med 2023;98:64-72)
랜덤 지형 생성 기반의 난이도 조절이 가능한 디펜스 게임 개발
유홍석(Hongseok Yoo),강민성(Min-Sung Kang),신영호(Young-Ho Shin),장재현(Jae-Hyun Jang),조성헌(Seong-Heon Joe) 한국컴퓨터정보학회 2021 한국컴퓨터정보학회 학술발표논문집 Vol.29 No.2
본 논문에서는 랜덤 생성 알고리즘을 도입한 디펜스 게임을 제안한다. 기존의 디펜스 게임은 지형물의 변형 및 확장이 불가능하다. 그것에 착안하여 지형물들의 위치가 랜덤으로 생성되는 시스템을 도입하였다. 본 게임은 지형물이 랜덤으로 생성되지만, 난이도에 따라 연속적으로 생성될 수 있는 지형물의 개수를 차별화하고, 사용자가 추가로 설치할 수 있는 지형물의 개수에 제한을 두었다. 또한 조작 가능한 캐릭터를 생성해 적을 공격할 수 있게 구현하여 사용자의 몰입도를 높여줄 것으로 기대한다.