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원형구멍이있는 띠모양평판에서의 광탄성 실험법에 의한 應力해석
박세만,박명균,정재진,백범선,김용주 明知大學校 産業技術硏究所 1994 産業技術硏究所論文集 Vol.13 No.-
A stress analysis on a strip with a circular hole was carried out by the computer assisted photoelastic experimental method. A stress concentration phenomenon around the hole of a strip under axial loading was carefully investigated through this study. The result shows that it well agrees with the results of finite element method and photoelasticity. We suggest that computer assisted photoelasticity experiment is very efficient method for data analysis compared to conventional experimental stress analysis method.
Baek, Myung Ju,Park, Ja Young,Xu, Wenlong,Kattel, Krishna,Kim, Han Gyeol,Lee, Eun Jung,Patel, Anilkumar Kantilal,Lee, Jae Jun,Chang, Yongmin,Kim, Tae Jeong,Bae, Ji Eun,Chae, Kwon Seok,Lee, Gang Ho American Chemical Society 2010 ACS APPLIED MATERIALS & INTERFACES Vol.2 No.10
<P>A facile one-pot synthesis of a water-soluble MnO nanocolloid (i.e., <SMALL>d</SMALL>-glucuronic acid-coated MnO nanoparticle) is presented. The MnO nanoparticle in the MnO nanocolloid was coated with a biocompatible and hydrophilic <SMALL>d</SMALL>-glucuronic acid, and its particle diameter was nearly monodisperse and ranged from 2 to 3 nm. The average hydrodynamic diameter of the MnO nanocolloid was estimated to be 5 nm. The MnO nanoparticle was nearly paramagnetic down to <I>T</I> = 3 K. The MnO nanocolloid showed a high longitudinal water proton relaxivity of <I>r</I><SUB>1</SUB> = 7.02 s<SUP>−1</SUP> mM<SUP>−1</SUP> with the <I>r</I><SUB>2</SUB>/<I>r</I><SUB>1</SUB> ratio of 6.83 due to five unpaired <I>S</I>-state electrons of Mn(II) ion (<I>S</I> = 5/2) as well as a high surface to volume ratio of the MnO nanoparticle. High contrast in vivo <I>T</I><SUB>1</SUB> MR images were obtained for various organs, showing the capability of the MnO nanocolloid as a sensitive <I>T</I><SUB>1</SUB> MRI contrast agent. The suggested three key-parameters which control the <I>r</I><SUB>1</SUB> and <I>r</I><SUB>2</SUB> relaxivities of nanocolloids (i.e., the <I>S</I> value of a metal ion, the spin structure, and the surface to volume ratio of a nanoparticle) successfully accounted for the observed <I>r</I><SUB>1</SUB> and <I>r</I><SUB>2</SUB> relaxivities of the MnO nanocolloid.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2010/aamick.2010.2.issue-10/am100641z/production/images/medium/am-2010-00641z_0012.gif'></P>
Isolation and Biological Activity of Sesquiterpene Lactone
Kim Myung-Ju,Oh Hyun-Ju,Baek Seung-Hwa The Physiological Society of Korean Medicine 2005 동의생리병리학회지 Vol.19 No.5
Sequiterpene lactone (1) has determined by spectroscopic analysis. This compound (1) inhibited the growth of the dermatophytic fungus Trichophyton mentagrophytes (ATCC 28185, 2 mm zone at $15{\mu}g/disk$), cytotoxic to murine leukaemia cell lines ATCC CCL 46 P388Dl, ($IC_{50}$ 1,125 ng/mL at $7.5{\mu}g/disk$) and BSC monkey kidney cell lines (100% of well at $15{\mu}g/disk$).
Antifungal Activity of Bioactive Fractions on the Dermatophytic Fungus
Kim Myung Ju,Na Young Soon,Chai Kyu Yun,Oh Hyun Ju,Baek Seung Hwa The Physiological Society of Korean Medicine and T 2004 동의생리병리학회지 Vol.18 No.3
Cytotoxic and antifungal activities were strongly shown by Fr. 4 (218 mg, P388 IC/sub 50/ 652 ng/ml at 75 μg/disc, IC50 834 ng/ml at 30 μg/disc and HM 8). The subfraction 4 - 3 that showed the most activity was cytotoxic to murine leukaemia cells ATCC CCl 46 P388D1, (44.0 mg, P388 IC50 302 ng/ml at 30 μg/disc).
중국인 한국어 학습자의 감정형용사 사용 양상 연구 - ‘섭섭하다’의 유의어를 중심으로-
백명주 ( Baek Myung-ju ),신우봉 ( Shin Woo-bong ) 우리어문학회 2022 우리어문연구 Vol.72 No.-
이 연구는 중국인 한국어 학습자의 ‘섭섭하다’의 유의어 사용 양상에 대해 살펴보고 이를 통해 어휘 교육에 활용할 수 있는 기초 자료를 마련하는 데 그 목적이 있다. 이를 위하여 ‘섭섭하다’의 사전 뜻풀이와 관련어 정보를 바탕으로 의미적으로 관련된 분석 대상 유의어들을 선정하였다. 이후 ‘한국어 학습자 말뭉치 나눔터’에서 원시 말뭉치 검색을 통해 추출한 자료를 바탕으로 중국인 한국어 학습자들이 감정표현 유의어를 사용할 때 어떤 어려움을 겪고 있는지 그 표현 양상을 분석하였다. 마지막으로 중국인 한국어 학습자들의 감정형용사 유의어 이해도를 확인하고 상황별 감정표현에서 중국인 한국어 학습자와 한국인 화자의 감정형용사 선택 양상을 비교 분석하기 위한 설문조사를 실시하였다. 분석 결과 중국인 한국어 학습자들은 ‘섭섭하다’의 유의어 간의 미묘한 의미차이를 정확하게 인식하지 못하고 유의 관계에 있는 다른 어휘와 서로 대체해서 사용하고 있다는 것을 알 수 있었다. 또한 동일한 상황맥락에서 선호하는 감정형용사에서도 한국인 화자와 많은 차이가 있는 것으로 나타났다. 한국인 화자는 상황별로 특정 어휘를 집중해서 선택한 반면 중국인 한국어 학습자는 여러 감정형용사를 분산해서 선택한 것으로 나타났다. 이를 통해 중국인 한국어 학습자들이 유의 관계에 있는 감정 어휘들을 정확하게 변별하는 데 어려움이 있다는 것을 확인할 수 있었다. 따라서 감정형용사 어휘 교육에서 중국인 한국어 학습자에게 해당 유의어와 대응하는 중국어의 의미적 공통점과 차이점을 주지시키고 중국인 한국어 학습자들이 어려워하는 상황 맥락과 의미 변별을 갖는 예문들을 활용하여 지도할 것을 제언하였다. The purpose of this study is to examine the usage patterns of the synonyms of ‘seobseobhada’ by Chinese Korean learners and to create foundational data that can be used for vocabulary education. First, significant keywords were selected for analysis based on the dictionary meaning of ‘seobseobhada’ and the information of related vocabularies. Then, based on the data from the search for primitive corpus in the ‘Korean Learner’s corpus Sharing Center’ the expression patterns were analyzed to see what difficulties Chinese Korean learners have when using synonyms describing emotions. Finally, a survey was conducted to confirm their understanding of emotive adjectives. Moreover, the emotive adjective selection patterns of Chinese Korean learners and Korean native speakers in different situations were compared and analyzed. As a result, it was found that Chinese Korean learners did not accurately recognize the subtle difference in meanings between the synonyms of ‘seobseobhada’ and used them in lieu of other vocabulary words. Given the same situation with native Korean speakers, a significant difference was observed for Chinese Korean learners when selecting a preferable emotional adjective. While Korean native speakers focused on a specific vocabulary for each situation, Chinese Korean learners distributed their preference of use among several emotive adjectives. Through this, it was confirmed that Chinese Korean learners struggled with making accurate differentiation among emotive vocabulary terms in a synonymous relationship. Therefore, in emotive adjective vocabulary education for Chinese Korean learners, it is suggested to inform them of the commonalities and differences between the meanings of synonyms in Chinese and to guide them by using example sentences with context and semantic differentiation.
Baek, Ju Yeol,Kang, Tae Soo,Rha, Seung-Woon,Choi, Byoung Geol,Park, Sang Ho,Jeong, Myung Ho Wolters Kluwer Health, Inc. All rights reserved. 2018 Coronary artery disease Vol.29 No.5
<P>BackgroundReduced preprocedural thrombolysis in myocardial infarction (TIMI) flow in patients with ST-segment elevation myocardial infarction (STEMI) is known to be associated with increased mortality. However, clinical implications of reduced preprocedural TIMI flow in patients with non-ST-segment elevation myocardial infarction (NSTEMI) have not been fully elucidated as yet. The aim of the present study was to compare the clinical influence of reduced preprocedural TIMI flows between patients with STEMI and NSTEMI undergoing percutaneous coronary intervention (PCI).MethodsFrom the Korea Acute Myocardial Infarction Registry, a total of 7336 AMI patients with angiographically confirmed reduced preprocedural TIMI flow (TIMI 0/1) during PCI were selected and divided into STEMI (n=4852) and NSTEMI (n=2484) groups. The 12-month composite of total death, nonfatal myocardial infarction, coronary artery bypass graft, and repeated PCI was compared between the two groups.ResultsAfter adjustment of baseline confounders by propensity score stratification, the NSTEMI group had lower incidences of major adverse cardiac events than the STEMI group (7.15 vs. 11.19%; hazard ratio: 0.63; 95% confidence interval: 0.47-0.84; P=0.001) at 12 months, which was largely attributable to the lower incidences of total deaths (2.43 vs. 3.99%; P=0.04) and repeated PCI (3.81 vs. 6.41%; P=0.01).ConclusionAmong AMI patients with TIMI 0/1, patients with NSTEMI had better outcomes compared with those of patients with STEMI on the basis of the incidences of 12-month outcomes. This could be attributable to lower total death and repeated revascularization in patients with NSTEMI.</P>
백일현,김종혁,이명석,백광호,한태호,박현주,박상훈,장웅기,김우중,박충기 대한간학회 2002 Clinical and Molecular Hepatology(대한간학회지) Vol.8 No.4
Primary hepatic leiomyosarcoma is a very rare malignant tumor of the liver and rather slowly progressing disease. When the tumor is solitary or even multiple but located in one lobe, the treatment of choice is an operation. We report a case of huge leiomyosarcoma in a 58-year old female patient treated by surgical resection.(Korean J Hepatol 2002;8:481-485)