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나기상,최원조,이범식 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.2
Fungal infections of the nose and paranasal sinuses are more common than previously suspected. This may be related to increased recognition of the problem with improvement of diagnostic techniques. And the factors that predispose to fungal infections have also increased. These factors include diabetes, malignant diseases, radiation, immunosuppressive therapy, long-term corticosteroid and antibiotic regimens, etc. But most of the aspergillosis of the paramnasal sinuses are found in patients in general good health. In these cases, it has been suggested that local predisposing factors such as anatomic variations and pathologic changes in ostiomeatal complex lead to a fungus infection. Twenty five cases of aspergillosis of the nose and paranasal sinuses seen during a period of 5.5 years from January 1991 through June 1996 at the Chungnam National University Hospital are reported and a review of the literature on aspergillosis is presented.
Low-Complexity Soft-Decision Viterbi Algorithm for IM/DD 56-Gb/s PAM-4 System
Rha, Hae Young,Moon, Sang-Rok,Kang, Hun-Sik,Lee, Seung-Woo,Hwang, In-Ki,Lee, Joon Ki Institute of Electrical and Electronics Engineers 2019 IEEE photonics technology letters Vol.31 No.5
<P>In this letter, a soft-decision Viterbi algorithm (SOVA) combined with low-density parity check is investigated to achieve high chromatic dispersion tolerance and alleviate the high optical signal-to-noise ratio (OSNR) requirement in pulse amplitude modulation 4-level (PAM-4) systems. To reduce the complexity increase over a maximum likelihood sequence equalizer, we propose a non-binary SOVA algorithm combining the conventional SOVA and the hard decision VA. To achieve low complexity, only one competing path in a state and time index is used to update reliability. After the updating process, reliabilities that remain un-updated are set to a fixed value according to the hard decided VA output. Also, the proposed algorithm generates reliability scalars instead of a reliability vector. The proposed algorithm was verified experimentally in a 56-Gb/s PAM-4 system with the transmission distance of 20 km. The results demonstrate that the proposed algorithm has an OSNR gain of 0.3 dB in comparison to the conventional SOVA with lower complexity at the BER of <TEX>$10^{\mathbf {-6}}$</TEX>.</P>
나기상,유문식 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2
Mucoceles are chronic, expansile, cyst-like lesions of the paranasal sinuses. They contain sterile mucoid secretions and limited by the mucosa of the affected cavity. Although benign, growth of the mucocele produces local bone destruction. The majority of mucoceles are situated in the frontal and/or ethmoidal sinuses. Their treatment can be achieved only by means of surgery. 15 cases of mucocele were analyzed and discussed for the standpoint of locations, presenting symptoms and signs, causal factors, the methods of surgical approach and the results.
Lee, Cheol Hyun,Kang, Do-Yoon,Han, Minkyu,Hur, Seung-Ho,Rha, Seung-Woon,Her, Sung-Ho,Seung, Ki-Bae,Kim, Kee-Sik,Lee, Pil-Hyung,Ahn, Jung-Min,Lee, Seung-Whan,Park, Seong-Wook,Park, Duk-Woo,Park, Seung- Elsevier/North-Holland Biomedical Press 2019 International journal of cardiology Vol.282 No.-
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Stent parameters (length and diameter) are well-known risk factors for adverse outcomes after percutaneous coronary intervention (PCI) with stenting. This study aimed to investigate the differential cutoff criteria and clinical impact of the length and diameter of various drug-eluting stents (DES) for predicting major cardiovascular events.</P> <P><B>Methods</B></P> <P>Using patient-level data from seven stent-specific, prospective DES registries, we evaluated 17,068 patients who underwent PCI with either various contemporary DES or first-generation DES between July 2007 and July 2015: 3053 treated with cobalt-chromium everolimus-eluting stents (CoCr-EES), 2976 with platinum-chromium EES (PtCr-EES), 2888 with Resolute zotarolimus-eluting stents (Re-ZES), 782 with Biomatrix biolimus-eluting stents (Bi-BES), 1868 with Nobori BES (No-BES), 1934 with Xience Prime cobalt-chromium EES (Pr-CoCr-EES), and 3567 with first-generation sirolimus-eluting stents (SES). Two clinical outcomes were assessed: target-vessel failure (TVF; a composite of cardiac death, target-vessel myocardial infarction, and target-vessel revascularization [TVR]) and TVR.</P> <P><B>Results</B></P> <P>Stent length and stent diameter were important factors for predicting TVF or TVR in the entire cohort and in each DES cohort. For TVF risk prediction, the Youden index-based cutoff of stent length was highest with Bi-BES (45.0 mm) and lowest with No-BES (29.0 mm), and the cutoff of stent diameter was smallest with Pr-CoCr-EES (2.78 mm) and largest with No-BES (3.20 mm). For TVR risk prediction, the cutoff of stent length was the highest with PtCr-EES (48.0 mm) and the lowest with No-BES (29.0 mm), and the cutoff of stent diameter was smallest with CoCr-EES (2.72 mm) and largest with first-generation SES (3.30 mm). The 3-year TVF and TVR rates were substantially different according to the presence or absence of long lesions and small vessels determined using these cutoff points.</P> <P><B>Conclusions</B></P> <P>For contemporary PCI practice involving diverse types of DES, we identified differential cutoff points of stent length and diameter for predicting adverse clinical outcomes. The clinical impact of these stent parameters on outcomes and its magnitude varied according to different DES.</P> <P> <B>Clinical Trial Registration</B>—URL: http://www.clinicaltrials.gov. Unique identifier: NCT01186133.</P>
Kim, Gwang-Sil,Kim, Byeong-Keuk,Shin, Dong-Ho,Kim, Jung-Sun,Hong, Myeong-Ki,Gwon, Hyeon-Cheol,Kim, Hyo-Soo,Yu, Cheol Woong,Park, Hun Sik,Chae, In-Ho,Rha, Seung-Woon,Jang, Yangsoo Wolters Kluwer Health, Inc. All rights reserved. 2017 Coronary artery disease Vol.28 No.5
<P>Conclusion Clinical parameters such as age, diabetes, and heart failure were independent predictors of the composite of cardiac death, myocardial infarction, and stent thrombosis, whereas angiographic or procedural parameters such as lesion length and number of implanted stents were predictors of target-vessel revascularization. Clinical outcomes after CTO intervention were worse in patients with multiple risk factors. Copyright (C) 2017 Wolters Kluwer Health, Inc. All rights reserved.</P>