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( Eun-gyo Jeong ),( Sung Shim Cho ),( Sang-hoon Lee ),( Kang-min Lee ),( Seo-kyung Woo ),( Yoongoo Kang ),( Jae-seung Yun ),( Seon-ah Cha ),( Yoon-jung Kim ),( Yu-bae Ahn ),( Seung-hyun Ko ),( Jung-mi 대한내과학회 2018 The Korean Journal of Internal Medicine Vol.33 No.5
Background/Aims: As the prevalence of diabetes mellitus and its complications increase rapidly, diabetic foot ulcers (DFUs), which are a major diabetic complication, are expected to increase. For prevention and effective treatment, it is important to understand the clinical course of DFUs. The aim of this study was to investigate the natural course and predictors of amputation in patients with DFUs who required hospitalization Methods: A total of 209 patients with type 2 diabetes, aged 30 to 85 years, who visited emergency department or needed hospitalization due to DFUs were consecutively enrolled from May 2012 to January 2016, by retrospective medical record review. The main outcome was lower extremity amputation (LEA). Results: Among 192 patients who completed follow-up, 113 patients (58.9%) required LEAs. Compared to patients without amputation, baseline levels of white blood cell counts and C-reactive protein were higher in patients with amputation. In addition, bone and joint involvement was more frequently observed in patients with amputation. Multivariable regression analysis revealed that combined infection (odds ratio [OR], 11.39; 95% confidence interval [CI], 2.55 to 50.93; p = 0.001) and bone or joint involvement (OR, 3.74; 95% CI, 1.10 to 12.70; p = 0.035) were significantly associated with an increased risk of LEA. Conclusions: The depth of the wound and combined infection of DFU, rather than the extent of the wound, were significant prognostic factors of LEAs in patients with type 2 diabetes.
이승철(Seung-Chul Lee),김승진(Seung-Jin Kim),한승우(Seung-Woo Han),김순교(Soon-Gyo Kim),정인영(In-Young Jeong),김선각(Sun-Kak Kim),엄인석(In-Suk Eom) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
실시간으로 긴박하게 진행되는 화력발전소의 기동 및 정지시의 각종 운전 조작 시퀀스는 상당 부분이 자동으로 진행된다. 그러나 발전엔지니어들은 모든 시퀀스가 정확하게 진행 되는지의 여부에 대한 감시와 판단을 백업(back-up)으로 진행하며 동시에 수동으로 조작해야 하는 기기들에 대해서는 적기에 기기조작을 해야 할 필요성이 있다. 긴박하게 진행되는 수많은 상황들이 모두 제대로 진행되고 있는지를 실시간으로 감시하는 일은 매우 복잡하고 긴장을 요하는 태스크이다. 본 논문은 발전소 기동 시 모든 기기 조작들이 기동 시?스에 따라 정확히 진행되는지의 여부를 지속적으로 감시하고 그 결과를 취합하여 발전 엔지니어들에게 편리하게 요약하여 제공하기 위한 지능시스템 개발에 관하여 기술한다.
ADCP를 이용한 유량측정에서 side-lobe현상 개선 연구
정승교(Jeong, Seung Gyo),황재성(Hwang, Jae Sung),이신재(Lee, Sin Jae) 대한토목학회 2020 대한토목학회 학술대회 Vol.2020 No.10
ADCP(Acoustic Doppler Current Profiler)는 유수의 흐름을 방해하지 않으면서 수중에 발사된 음파의 도플러 효과를 이용하여 3차원 유속 측정이 가능한 초음파 유량측정장비이다. 이에 최근 국내에서는 ADCP를 이용한 유량측정이 증가하고 있다. 하지만 ADCP를 이용한 유속 또는 유량측정을 수행하다 보면 수중 식생에 의한 오측 및 결측 등이 발생하여 측정된 자료의 불확도가 증가하게 된다. ADCP에서 수중에 발사한 음파 중 식생에 부딪친 강한 반사파의 노이즈로 side-lobe현상에 의한 오측 및 결측이 발생한다. 현재 오측 및 결측 자료는 ADCP 제조사별 자료 취득 소프트웨어의 기능에 의존 하거나, USGS의 OSW(Office of Surface Water) Hydroacoustics의 QRev를 이용하여 후처리 과정을 거쳐 측정 자료로 정리하고 있다. 이에 본 연구에서는 노이즈로 인한 side-lobe현상을 물리적인 방법으로 제거하기 위해 음향 녹음 과정에서 노이즈를 물리적인 방법으로 제거하는 윈드실드와 팝 필터를 고려한 ADCP필터를 개발하여 적용하였다. 그 결과 side-lobe현상에 의한 오측 자료들이 많이 개선되는 결과를 보였다.
New Records of Intertidal Marine Algae from Korea
Jeong, So Young,Bustamante, Danilo E.,Lee, Jin Gyo,Won, Boo Yeon,Kim, Seung Hee,Cho, Tae Oh Korean Society of Environmental Biology 2017 환경생물 : 환경생물학회지 Vol.35 No.3
Bryopsis africana and Pyropia kinositae are reported for the first time on the list of Korean marine algal flora based on integrated morphological-molecular study. Bryopsis africana from Korea is recognized with distinct main axes, robust thalli, pinnately and radially branched above, and basally denuded. Phylogenetic analyses revealed that B. africana was placed within a clade of Bryopsis. Bryopsis africana differs from B. corymbosa by 2.7% gene sequence divergence. Pyropia kinositae is characterized by oblong to lanceolate thalli, entire margin, purplish red in color, twice as long as broad cells in transversal section view. Phylogenetic analyses revealed that P. kinositae was placed within a clade of Pyropia. Pyropia kinositae differs from P. tenera by 1.5-1.8%, P. ishigecola by 1.2-1.3%, and P. yezoensis by 1.5-1.8% gene sequence divergence respectively.
Jeong, So Young,Bustamante, Danilo E.,Lee, Jin Gyo,Won, Boo Yeon,Kim, Seung Hee,Cho, Tae Oh Korean Society of Environmental Biology 2017 환경생물 : 환경생물학회지 Vol.35 No.3
Detailed morphological studies and molecular analyses based on plastid-encoded rbcL gene sequences were undertaken on Peyssonnelia species, a poorly known genus from Korea. We report new records for the Korean coast, Peyssonnelia harveyana and P. rumoiana. Peyssonnelia harveyana is chiefly characterized by P. rubra-type anatomy, closely packed perithallial filaments in firm matrix, hypothallial filaments arranged in parallel rows, thalli with appressed margins, hypobasal calcification, and unicellular rhizoids. Peyssonnelia rumoiana is principally characterized by two vegetative features, hypothallial filaments arranged in a polyflabellate layer, and perithallial filaments arising from the whole upper surface of each hypothallial cell (Peyssonnelia rubra-type anatomy). Our rbcL analyses revealed that P. harveynana and P. rumoiana were placed within a clade of Peyssonnelia. We also propose the new combination, Sonderophycus cauliferus comb. nov., for previous Peyssonnelia caulifera. Phylogenetic analyses revealed that our S. cauliferus was placed within a clade of Sonderophycus.
Seung-Hyeok Seok,Yi Rang Na,Daun Jung,Gyo Jeong Gu 한국분자세포생물학회 2016 Molecules and cells Vol.39 No.10
Granulocyte-macrophage colony stimulating factor (GM-CSF) has a role in inducing emergency hematopoiesis upon exposure to inflammatory stimuli. Although GM-CSF generated murine bone marrow derived cells have been widely used as macrophages or dendritic cells in research, the exact characteristics of each cell population have not yet been defined. Here we discriminated GM-CSF grown bone marrow derived macrophages (GM-BMMs) from dendritic cells (GM-BMDCs) in several criteria. After C57BL/6J mice bone marrow cell culture for 7 days with GM-CSF supplementation, two main populations were observed in the attached cells based on MHCII and F4/80 marker expressions. GM-BMMs had MHCIIlowF4/80high as well as CD11c+CD11bhighCD80-CD64+MerTK+ phenotypes. In contrast, GM-BMDCs had MHCIIhighF4/80low and CD11chighCD8α-CD11b+CD80+CD64-MerTKlow phenotypes. Interestingly, the GM-BMM population increased but GM-BMDCs decreased in a GM-CSF dose-dependent manner. Functionally, GM-BMMs showed extremely high phagocytic abilities and produced higher IL-10 upon LPS stimulation. GM-BMDCs, however, could not phagocytose as well, but were efficient at producing TNF, IL-1, IL-12p70 and IL-6 as well as inducing T cell proliferation. Finally, whole transcriptome analysis revealed that GM-BMMs and GM-BMDCs are overlap with in vivo resident macrophages and dendritic cells, respectively. Taken together, our study shows the heterogeneicity of GM-CSF derived cell populations, and specifically characterizes GM-CSF derived macrophages compared to dendritic cells.