정보통신 용어에 나타난 漢字語 비교 연구

裵宰奭 이화여자대학교 한국어문학연구소 2006 Korean 교육 학술토론회 자료집 Vol.2006 No.3

Quantitative Evaluation of Hepatic Steatosis Using Normalized Local Variance in a Rat Model: Comparison with Histopathology as the Reference Standard

배재석,Jae Young Lee,Dong Ho Lee,Haeryoung Kim,Youngeun Lee,Joon Koo Han 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.9

ObjectiveTo evaluate the diagnostic performance of the normalized local variance (NLV) ultrasound technique in the assessment of hepatic steatosis, and to identify the factors that influence the NLV value using histopathological examination as the reference standard. Materials and MethodsForty male Sprague-Dawley rats were fed a methionine-choline-deficient diet for variable periods (0, 2, 4, 6, 8, 10, or 12 days or 2, 3, or 4 weeks; four rats per group). At the end of each diet duration, magnetic resonance spectroscopy (MRS) and NLV examination were performed. Thereafter, the rats were sacrificed and their livers were histopathologically evaluated. Receiver operating characteristic (ROC) curve analysis was performed to assess the diagnostic capability of the NLV value in the detection of varying degrees of hepatic steatosis. Univariate and multivariate linear regressions were used to determine the factors associated with the NLV value. ResultsThe areas under the ROC curve for the detection of mild, moderate, and severe hepatic steatosis were 0.953, 0.896, and 0.735, respectively. The NLV value showed comparable diagnostic performance to that of MRS in the detection of ≥ mild or ≥ moderate hepatic steatosis. Multivariate linear regression analysis revealed that the degree of hepatic steatosis was the only significant factor affecting the NLV value (p < 0.001). ConclusionThe NLV value of ultrasound demonstrated satisfactory diagnostic performance in the assessment of varying degrees of hepatic steatosis. The degree of hepatic steatosis was the only significant factor that affected the NLV value.

Cyber 상의 중국어 표기법 연구

裵宰奭 중국어문학연구회 2002 중국어문학논집 Vol.- No.19

〉The aim of this paper is to present a new Chinese input method through Korean Alphabet in cyber space. In chapter two, I have examined previous proposals on Chinese notation through Korean. In chapter three, I proposed a new Chinese input method through Korean Alphabet which can be used in cyber space. This new method is made on the concept of Medial Language which is suggested in this paper. Medial Language is a language system which is used in cyber space. If it is used in off-line, it could be used as a kinf of phonetic symbol.

Comparison of MicroFlow Imaging with color and power Doppler imaging for detecting and characterizing blood flow signals in hepatocellular carcinoma

배재석,이정민,전선경,장시원 대한초음파의학회 2020 ULTRASONOGRAPHY Vol.39 No.1

Purpose: The purpose of this study was to compare the sensitivity of MicroFlow Imaging (MFI) with that of color and power Doppler imaging (CDI and PDI, respectively) in detecting the vascularity of hepatocellular carcinomas (HCCs). Methods: This prospective study enrolled 51 patients diagnosed with HCC between August 2018 and December 2018. CDI, PDI, MFI, and contrast-enhanced ultrasound (CEUS) were performed. Two radiologists evaluated the presence and pattern of tumoral vascularity on CDI, PDI, and MFI. Vascular presence was graded on a 5-point scale (0, absent; 4, >50% of the tumor). The vascular pattern was chosen from following categories: basket, vessels in tumor, spot, detouring, mixed, or others. Two additional radiologists assessed CEUS images for the presence and pattern of tumoral vascularity, which served as the reference standard. If the tumoral vascular pattern on each examination matched that of the CEUS images, the Wilcoxon test and McNemar test, respectively, were used to compare the sensitivity for detecting tumoral vascularity between MFI and CDI, and between MFI and PDI. Logistic regression analysis was performed to identify factors associated with MFI detectability of tumoral vascularity. Results: CEUS demonstrated tumoral vascularity in 98.0% (50 of 51) of patients. MFI (58.0%, 29 of 50) demonstrated a higher sensitivity than CDI (14.0%, 7 of 50) or PDI (14.0%, 7 of 50) (P<0.001 for both) in detecting tumoral vascularity, provided that the vascular pattern was correctly depicted. Only tumor depth was associated with the MFI detectability of tumoral vascularity. Conclusion: The sensitivity of MFI was higher than that of CDI or PDI in detecting the vascularity of HCCs when the vascular pattern was considered. MFI better detected the vascularity of shallow tumors.

고교 중국어 기본어휘 만족도 조사 연구

배재석,임승규 중국어문학연구회 2005 중국어문학논집 Vol.0 No.32

중국에서의 중국언어정보처리 연구 현황

배재석 韓國中語中文學會 2001 中語中文學 Vol.29 No.-

하천 흐름 수치모의에 미치는 조도계수의 영향 분석

배재석,신충훈,이장춘,윤성범 한국방재학회 2012 한국방재학회논문집 Vol.12 No.2

For the determination of the appropriate roughness coefficient applied to the dimensional models to analyse the stream flow,various numerical simulations with a straight channel, a straight channel with obstructions, and a meandering channel were performed using HEC-RAS as one-dimensional model, RMA2 as two-dimensional model, and FLOW-3D as three-dimensional model with a same Manning's n-value. From the simulation results it was found that each model gives different water surface profiles,even though the same roughness coefficient applied to the one-dimensional model was used for the two-and three-dimensional models. Based on the mechanism analyses of the numerical results it was found that the energy loss due to two-or threedimensional flow effect is considered twice in the two-or three-dimensional model. Thus, the Manning's n-value required for the numerical computation of stream flow is different according to the numerical model adopted, the grid or mesh system and the flow characteristics, and it should be adjusted through the comparison between the observed and calculated surface profiles. 하천 흐름해석을 위한 수치모형에 적용되는 적정 마찰계수의 선정을 위하여 직선수로, 지장물이 존재하는 직선수로와 사행수로의 흐름에 대하여 일정한 마찰계수 n값을 적용하여 1차원 수치모형 HEC-RAS와 2차원 수치모형 RMA2, 그리고 3차원 수치모형 FLOW-3D를 이용하여 수치모의를 수행하였다. 수치모의 결과 2차원 및 3차원 수치모형에 1차원 수치모형에 적용했던것과 동일한 Manning 계수 n값을 적용하였음에도 불구하고 각 모형에 따라 서로 다른 수위분포를 주는 것을 확인할 수 있었다. 이러한 수치모의 결과에 대한 메카니즘 분석을 통해 2차원 및 3차원 흐름효과에 의한 에너지 손실이 중복되어 고려되었기때문임을 규명하였다. 따라서 하천흐름 모의시 사용하는 수치모형, 격자체계 및 흐름 특성에 따라 요구되는 Manning 계수가서로 다르며, 실측치와의 비교를 통해 조정하여 사용해야 함을 알 수 있었다.

古代韓國漢字音的分期

배재석 경희대학교 비교문화연구소 2005 비교문화연구 Vol.9 No.1

Multi-Detector CT Coronary Angiographic Findings of Coronary-to-Pulmonary Artery Fistula

배재석,박은아,임지연,이활,박재형 대한영상의학회 2017 대한영상의학회지 Vol.76 No.1

Purpose: To evaluate multi-detector CT (MDCT) coronary angiographic findings of coronary-to-pulmonary artery fistula (CPAF). Materials and Methods: We retrospectively reviewed images of patients with CPAF from the coronary CT angiography (CCTA) database obtained with a 64-channel MDCT between January 2008 and March 2011. We analyzed the CCTA findings for feeding arteries, fistula, association with peripulmonary arterial aneurysms, and the presence of communication between the CPAF and bronchial arteries. Results: Fifty-five of the 15042 (0.37%) patients were diagnosed with CPAFs. The feeding artery was single (n = 18) or multiple (n = 37). The fistula had a single drainage site (n = 54) or multiple drainage sites (n = 1). The mean diameter of the fistulous opening was 2.7 ± 1.4 mm. A peripulmonary arterial aneurysm was present in 24 (44%) patients. Communication between CPAF and bronchial arteries was present in eight (14.5%) patients. Conclusion: MDCT coronary angiography can provide comprehensive morphologic details on CPAF and may help in presurgical or preinterventional planning.

식품 유화액 시스템에서 락토페린의 유화 특성

배재석,김정원,정용선,이의석,홍순택 한국유화학회 2013 한국응용과학기술학회지 Vol.30 No.4

This study aimed to investigate the emulsifying properties of bovine lactoferrin in food emulsion system. First, lactoferrin solution was prepared to study its surface activities, such as surface adsorption characteristics and ζ-potential. Second, some physicochemical properties of lactoferrin emulsion which resulted from variations of environmental conditions (i.e., pH or NaCl addition) were determined. As for surface adsorption characteristics evaluated by surface tension, it was decreased with increasing lactoferrin concentration in solution (1x10⁻⁵→0.2 wt%) and showed a plateau (≒44 mN/m) above 0.01 wt%. It was also changed with pH and the minimum value of 53.8 mM/m was observed at pI of lactoferrin. This was related to changes in ζ-potential of the lactoferrin solution with respect to pH. Fat globule size of lactoferrin emulsion was decreased with increasing lactoferrin concentration and a stable emulsion was formed above 0.5 wt% lactoferrin in emulsion with fat globule size d₃₂ of ca. 0.33 μm as confirmed by creaming stability experiment (i.e., Turbiscan). As with surface tension, fat globule size of lactoferrin emulsion also changed with pH and showed a maximum value at pI. As evaluated by Turbiscan, in the presence of NaCl, the lactoferrin emulsion showed instability in particular above 10 mM.