Thermal and optical properties of Yb-doped Lu2O3 single crystal grown by the micro-pulling-down method

J. H. Mun,A. Jouini,A. Yoshikawa,Lyon1 University,T. Fukuda,J. S. Lee 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.5

Undoped and (0, 0.5, 5 mol%) Lu2O3 single crystals were grown by the micro-pulling-down method. Crystals were transparent with yellowish color with 4.2 mm in diameter and 6-9 mm in length. Yb-doped Lu2O3 single crystals have a good compositional homogeneity along the growth axis. Both, thermal diffusivity and heat capacity decrease when the Yb concentration increase. As a result, the calculated thermal conductivity for 5 mol% Yb3+-doped Lu2O3 decreases from 14.32 to 12.42 Wm−1 K−1 . We have also investigated the absorption, fluorescence spectra and measured fluorescence lifetimes as a function of the Yb content.

Immunologic properties of differentiated and undifferentiated mesenchymal stem cells derived from umbilical cord blood

Hyo-Jong Lee,Kyung-Sun Kang,Sun-Young Kang,Hyung-Sik Kim,Se-Jin Park,Seung-Yong Lee,Kwang-Dong Kim,Hee-Chun Lee,Ji Kwon Park,Won Young Paik,Lyon Lee,Seongchan Yeon 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.3

The expression of immunogenic markers after differentiation of umbilical cord blood (UCB)-derived mesenchymal stem cells (MSC) has been poorly investigated and requires extensive in vitro and in vivo testing for clinical application. The expression of human leukocyte antigen (HLA) classes on UCB-derived MSC was tested by Fluorescence-activated cell sorting analysis and immunocytochemical staining. The undifferentiated MSC were moderately positive for HLA-ABC, but almost completely negative for HLA-DR. The MSC differentiated to chondrocytes expressed neither HLA-ABC nor HLA-DR. The proliferation of MSC was not significantly affected by the allogeneic lymphocytes stimulated with concanavalin A. The responder lymphocytes showed no significant decrease in proliferation in the presence of the MSC, but the apoptosis rate of the lymphocytes was increased in the presence of MSC. Taken together, these findings indicate that UCB-derived MSC differentiated to chondrocytes expressed less HLA class I and no class II antigens. The MSC showed an immunomodulatory effect on the proliferation and apoptosis of allogeneic lymphocytes. These data suggest that the differentiated and undifferentiated allogeneic MSC derived from umbilical cord blood can be a useful candidate for allogeneic cell therapy and transplantation without a major risk of rejection.

Atropine Induced Paradoxical Atrioventricular Conduction Block in a Jindo Dog

Moo-Hyun Lee,Seung-Gon Lee,Hyeong-Sun Moon,Joon-Seok Lee,Lyon Lee,Changbaig Hyun 한국임상수의학회 2007 한국임상수의학회지 Vol.24 No.3

laboratory tests performed prior to surgery found no significant abnormalities, which might increase risks associatedwith general anesthesia. The dog was premedicated with atropine, induced general anesthesia with thiopental sodiumand maintained with isoflurane. Forty minutes after surgery, the dog was suddenly bradycardic. Atropine (18 ug/kg)was slowly infused intravenously to normalize heart rate. However, paradoxically the dog showed slower heart ratewith intermittent atrioventricular block (2nd degree type I) after atropine infusion. The dogs rhythm was returned toa rare case of paradoxical atrioventricular block inducedby high dose of atropine in a dog.

약토 시용방법이 인삼 양직묘 뿌리 생육에 미치는 영향

이성식(Sung-Sik Lee),천성기(Seong-Ki Cheon),이장호(Jang-Ho Lee),안인옥(In-Ok Ahn),신성련(Seong-Lyon Shin),최광태(Kwang-Tae Choi),이갑수(Gab-Soo Lee),이형식(Hyung-Sik Lee),정재동(Jae-Dong Chung) 고려인삼학회 2004 Journal of Ginseng Research Vol.28 No.4

This experiment was conducted to determine economic application method of Yakto among 6 application method: amount of Yakto application 3 plots(70ℓ, 25.5ℓ, 13.3 ℓ/kan), and added side dressing(3ℓ/kan) each plot. The reduced Yakto application(25.5ℓ/kan) with side dressing(3ℓ/kan) showed similar root diameter, fresh weight of roots and yield of good seedlings to standard Yakto application(70ℓ/kan). And also this application method of Yakto gave similar content of Ca and Mg, but the lower content of N, P, K in roots to standard Yakto application(70ℓ/kan). These suggested that 25.5ℓ Yakto application added side dressing(3ℓ/kan) per kan might be economical application method of Yakto.

Proteomic analysis of muscarinic acetylcholine receptor-mediated proliferation in HT-29 human colon cancer cells

Lee, Soo Youn,Lee, Ar-Reum,Ahn, Ji-Young,Ko, Jung Ho,Lee, Lyon,Han, Janet,Kim, Young-Chang,Kim, Yang-Hoon THE KOREAN SOCIETY OF TOXICOGENOMICS AND TOXICOPRP 2018 MOLECULAR AND CELLULAR TOXICOLOGY Vol. No.

Backgrounds: Muscarinic acetylcholine receptors (mAChRs) are members of G-protein-coupled receptors. They can induce agonist-dependent neoplastic transformation and facilitate colon cancer proliferation via promoting rapid expression of a variety of early responsive genes. Methods: In this study, we used 2-dimensional gel electrophoresis(2-DE) approach with subsequent mass spectrometry (MS) to identify up- and down-regulated proteins (a total of 23 protein spots) involved in mAChRs-related signaling pathway, energy metabolism, transcription/translation, oxidative stress metabolism and cytoskeleton organization in agonist carbachol stimulated HT-29 human colon cells. Results: We found that the increased expression of adenocarcinoma biomarker, annexin A5 (ANXA5) induced by carbachol treatment, which was confirmed by immunoblot. This study contributes to the understanding of mechanisms underlying mAChRs agonist-induced expression of whole proteins in HT-29 colon cancer cells. Conclusion: Our results indicated that ANXA5 might serve as a potential biomarker for the diagnosis of colon cancer.

Pronunciation Instruction in the ESL Classroom : A Necessity

Lee, Jane Lyon 中央大學校 韓國敎育問題硏究所 1995 韓國敎育問題硏究所論文集 Vol.- No.10

새로운 언어를 이해하기 위해서는 다음의 6가지의 언어적 요소들이 충족되어야 한다. 발음(pronunciation), 문법(grammar), 어휘/숙어(lexis), 스타일(style), 기능(function), 대화상황(discourese)이 그것들이다. 이들 중 어느 하나라도 제대로 이루어지지 않을 경우, 청자의 오해나 상황에 맞지 않는 대화를 초래할 수도 있다. 이러한 가정을 기반으로, 이 논문에서는 특히나 발음지도야말로 모든 ESL 수업의 근간임을 강조하는 것이다. 청자의 언어에 대한 이해수준이나 문법적이 이해도가 어떤 수준이든 간에 올바르고 적절한 발음이야말로 매우 중요한 요소이다. 그 발음이 정확하고 화자 자신의 의사를 정확하게 소리로 표현하지 못한다면 다른 어떤 요소들의 의미도 가감되리라 사려된다. 그래서 ESL 수업의 초점이 읽기, 번역, 작문 기타 회화등에 맞추어져도 발음에 대한 정확한 지도는 반드시 이루어져야 한다. 또한 ESL 수업시에는 모국의 사용은 최소한도로 제한되어야 한다. 그리고 ESL 교사는 수업전에 반드시 4가지 질문에 대답해야 한다. 첫째 학생들의 발음수준을 어느 정도 기대하는가? 둘째, 특정한 발음을 지도하는 데 있어서 모범이 되거 나 기준(criteria)이 되는 발음은 무엇인가? 셋째, 학생들의 수준을 감안할 때 발음의 어떤 요소를 강의해야 하는가? 이 논문에서 학생들을 지도하는 것과 관련해 가장 중요한 요소로 보는 질문은 교실내에서 내가 제일 잘 사용할 수 있고 학생과 교사 사상에 발음 학습목표를 잘 수행할 수 있도록 도와줄 수 있는 동시에 재미있고 동기유발을 주고 자신감을 줄 수 있는 그러한 다양한 방법이나 도구가 무엇인가? 하는 것이다. 따라서 이 논문의 목적은 이 질문들에 대한 답을 제공하기 우한 것이며, ESL 학습의 각기 다른 단계에 있는 학생들에게 발음의 다른 요소들을 학습시키기 위해서 사용될 수 있는 재미있고 효과적인 학습방법과 연습을 제공하는 데 있으며 또한 교사가 학생들의 발음의 진도의 정도를 어떻게 측정할 수 있는지에 대해서 알기 쉽게 접근해 보았다.

THE ORIGINAL ENVIRONMENT OF THE SOLAR SYSTEM INFERRED FROM THE OXYGEN ISOTOPE ANOMALIES

Lee, Jeong-Eun,Bergin, Edwin A.,Lyons, James R. The Korean Astronomical Society 2007 Journal of The Korean Astronomical Society Vol.40 No.4

The original environment of the solar system can be inferred by studying the oxygen isotope ratios in the Sun as well as in primitive meteorites and comets. The oxygen isotopic fractionation measured in primitive meteorites is mass-independent, which can be explained by the isotopic-selective photodissociation of CO. The isotopic-selective photodissociation model in a collapsing cloud by Lee et al. (2007) imply the birth of the Sun in a stellar cluster with an enhanced radiation field, which is consistent with the inferred presence of $^{60}Fe$.

Teaching Formal Presentation in the Speaking/Listening ESL Classroom

Lee,Jane Lyon 中央大學校 韓國敎育問題硏究所 1993 韓國敎育問題硏究所論文集 Vol.- No.8

The following paper identifies the necessity for an ESL unit regarding the formal presentation. The author explains that while the need for such a unit amy not have been visible in the past, changing student goals and needs currently call for such a lesson to be included in the ESL syllabus at all levels. The author then proceeds to distinguish the formal presentation from the informal presentation by pointing out the four areas ; preparation, presentation style, topic and presentation time, in which the two kinds of presentations most distinctly differ. After clearly conceptualizing the idea of formal presentation, the basic schema of skill-getting is borrowed from Don Parker's individualization of Instruction. Adapting this schema to the previously defined formal presentation, the author identifies formal presentation skill-getting elements as confidence in the language, organization and sequence, pronunciation and intonation and sequence, pronunciation and intonation and topic familiarity while maintaining Parker's original assertion that interaction and reciprocity exist as the skill-using area. This author asserts that through specific teacher-guided class activities and exercises, the skill-getting elements can be facilitated for and developed to such an extent that the student will be able to successfully make a formal presentation inside and outside the classroom setting. While explaining the details for the implementation of specific activities, the author points out that the activities in this paper are related to the speaking and listening language areas. It is also stressed that the activities be used in conjunction with each other. In conclusion, the author explains that the ultimate goal of this paper is to motivate other native and foreign-speaking ESL teachers to conduct further scientific and practical studies in this area of ESS teaching.

Using the Listening Lab as an Effective Teaching Tool

Lee,Jane Lyon 中央大學校 韓國敎育問題硏究所 1996 韓國敎育問題硏究所論文集 Vol.- No.11

이 논문은 EFL 교육과정의 듣기능력 재고를 위한 요령들에 대한 최근의 관심을 집중적으로 연구한 것이다. 요약하자면 듣기요령을 강의하는데 있어서 듣기 Lab 활용의 효율적 운영에 집중되어 있다. 이 논문에서 본인은 듣기과정의 목표를 근간으로 듣기요령들을 3개의 분야로 나누었다. 반복하는 듣기, 이해하는 듣기, 그리고 대답하는 듣기가 바로 그것들이다. 이 3가지의 분야들을 기본으로해서 Lab을 사용하기를 권하며, 요구되는 언어요령에 따라 Lab 안에서 다른 강의법을 사용하기 바란다. Lab 시설을 올바르게 사용하기 위해서, 듣기교재의 장단점에 대한 간략한 소개는 Lab에 대한 기술적·기계적 노하우가 얼마나 중요한 가에 대한 점 뿐만아니라 효과적인 Lab교재의 선택이 필수적임을 제시하고 있다. 또한 교재와 더불어 상호호응을 일으키기 위한 부가적인 Lab 활동이나 게임의 활동이 논의되고 있고, 다양한 강의방법의 기능이나 Lab에서 강사들의 일반적인 어려움과 발음과 억양에 대해서도 언급하였다. 마지막으로, 모든 EFL 강의들이 Lab 시설들로 행해질 만한 여건은 아니기에, 전통적인 강의실내에서도 마찬가지로 효과적으로 모든 듣기요령의 분야들이 강의될 수 있다고 생각하며 더 나아가 교실내 활동, 교재 및 특정한 게임들에 대해서도 자세히 설명되어 있다. 본인은 이러한 교실내 상황에서도 Lab 시설의 활용효과보다도 더 큰 상호커뮤니케이션의 효과를 볼 수 있다고 생각한다. 그리고 이 논문은 Lab의 기능과 다른 유사한 시설들의 기능들에 대해서도 계속해 연구가 뒤따라야 한다는 점을 강조하고 있다.

Using the Listening Lab as an Effective Teaching Tool

Jane Lyon Lee 중앙대학교 한국교육문제연구소 1996 한국교육문제연구 Vol.- No.11