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이경희,유위량,한현석,부진효,이순보,곽현태 성균관대학교 기초과학연구소 1998 論文集 Vol.49 No.-
The interaction of CO with W(110) surface was investigated through LEED, TDS, and photoelectron spectroscopy using synchrotron radiation under UHV condition. After CO saturation at RT, two desorption states, called α and β , were observed at about 400 and 1150 K in thermal desorption spectra, respectively. The kinetics of 3-CO followed the first order kinetics, indicating the existence of molecular CO on W(110) surface. This is contrary to the previous results. The O 1s BE(binding energy) of CO adsorbed on W(110) surface at room temperature was 529.9 eV. On the other hand, the O 1s BE of β-CO after heating to 900 K was different from that of oxygen adsorbed W(110) surface, suggesting a different adsorption state. According to the UP valence band spectra, we observed two peaks at near -10.7 eV (4σ) and -7.0 eV (5σ+1π), indicating the molecular adsorption of CO at room temperature. Furthermore we could see the 4σ peak at the various photon energy and elevated temperatures. Comparing the energy separation, Δ(4σ-1π) , between 4σ and 1π UP peaks of chemisorbed CO, we found that an increased separation reflects an decreased C-O bond strength. Therefore on the basis of TDS and photoelectron spectroscopy, we could suggest that β state of CO on W(110) may not be dissociated and has an adsorption geometry of lying-down mode.
A Compact Mechanical Gripper System for Meso-Scale Parts Using a Ball-Roller Joint
Wang, Wei,Lee, Dong Mok,Lee, Hoon Hee,Lee, Sang Ryong,Yang, Seung Han Trans Tech Publications, Ltd. 2013 Advanced materials research Vol.711 No.-
<P>In this paper, a compact gripper system is designed to pick up meso-scale parts. A mechanical gripping method is chosen with a new type of joint. Based on the kinematics and material mechanics, the gripper motion is analyzed. Finally, a prototype gripper system based on the design and analysis results is fabricated. The motion principle is checked using laser diodes and position sensing detectors.</P>
Nuclear Theranostics in Taiwan
Ko-Han Lin,Yi-Wei Chen,Rheun-Chuan Lee,Ling-Wei Wang,Fong-In Chou,Chi-Wei Chang,Sang-Hue Yen,Wen-Sheng Huang 대한핵의학회 2019 핵의학 분자영상 Vol.53 No.2
Boron neutron capture therapy and Y-90 radioembolization are emerging therapeutic methods for uncontrolled brain cancers and hepatic cancers, respectively. These advanced radiation therapies are heavily relied on theranostic nuclear medicine imaging before the therapy for the eligibility of patients and the prescribed-dose simulation, as well as the post-therapy scanning for assessing the treatment efficacy. In Taiwan, the Taipei Veterans General Hospital is the only institute performing the BNCT and also the leading institute performing Y-90 radioembolization. In this article, we present our single institute experiences and associated theranostic nuclear medicine approaches for these therapies.
소비자의 화폐태도와 과시소비성향 연구: - 한 ․ 중 대학생 소비자를 중심으로 -
한 미(Han Wei);이승신(Lee Seung Sin) 건국대학교 경제경영연구소 2013 商經硏究 Vol.2016 No.1
현대사회는 소비자의 생활수준의 향상으로 소비자들의 욕구수준도 상승함에 따라 소비자들의 소비성향이나 소비방식도 바뀌고 있다. 본 연구에서는 화폐태도와 과시소비를 중심으로 소비자의 과시소비성향을 주목하여 연구를 하였다. 화폐태도란 감정적인 의미 외에도 화폐를 어떤 목적을 달성할 수 있는 수단으로 이해하느냐 하는 차원을 포함하는 광범위한 의미와 가치관 또는 신념으로 정의한다. 과시소비란 자기가 특정한 사회계급, 특히 상류계급이나 보다 특수한 유한계급에 속해 있는 것을 상징하기 위해서 재화나 서비스를 아낌없이, 또한 헛되게 소비하는 행위를 말한다. 본 연구에서는 과시소비 성향 유형은 ‘브랜드 지향’, ‘수입 지향’, ‘유행 지향’으로 구분하였다. 본 연구는 2012년 4월 9일부터 16일까지 한국과 중국 대학생을 대상으로 각 215부의 설문지를 배포하여 총 415부를 분석에 사용하였다. 주요 연구결과는 다음과 같다. 첫째, 한・중 대학생소비자의 과시소비성향이 심각한 정도는 아니지만 어느 정도의 과시소비성향을 나타내고 있다. 한・중 대학생소비자의 과시소비성향 차이에서는 전체적으로는 유의한 차이는 보이지 않았지만 문항별로는 부분적으로 유의한 차이를 보였다. 둘째, 한・중 대학생소비자들의 화폐태도 차이에서는 불안의 원천요인에서 전체적으로 유의한 차이를 보였으며, 중국 대학생소비자에 비해 한국소비자가 불안의 원천이라는 태도가 높게 나타났다. 셋째, 대학생소비자 화폐태도중 한국의 경우 성공의 상징, 감정충족의 도구라는 태도가 높은 집단이 과시소비성향이 높았고 중국의 경우는 성공의 상징, 감정충족의 도구, 불안의 원천이라는 태도가 높을수록 과시소비성향이 높게 나타났다. In the modern society, the consumers consider the social factors, subjective meanings or the symbolism carried by the products to be more important than their necessary functions. In this paper, the self-recording survey was implemented to the Korean and Chinese undergraduate consumers aiming to figure out their rhetorical consumption tendency according to their attitude to the currency. The undergraduates residing in the Korean Seoul districts and the Chinese Beijing districts were selected. The analytic results were summarized as follows. Firstly, the rhetorical consumption tendency showed by the consumers from the two countries has not reached the serious degree, but the trend has reached to a certain extent. Secondly, to the Korean consumers, the females showed higher rhetorical consumption tendency than the males. To the Chinese consumers, the higher degree of the rhetorical consumption tendency was showed in according with the higher consumed amount. Thirdly, according to their attitude to the currency, both consumer groups showed higher rhetorical consumption tendency to the ‘brand directivity’, ‘income directivity’, and the ‘fashion directivity’ with the increasing degree of the ‘symbolic factor of success’, ‘factors of emotion satisfactory’. To the Korean subjects, no significant differences were showed. Fourthly, both groups showed great influence from their friends and the mass media, which increased their higher rhetorical consumption tendency to the ‘brand directivity’, ‘income directivity’, and the ‘fashion directivity’. The influences from the mass media showed the higher effects. Moreover, to the Korean group, greater influences from their parents made their rhetorical consumption tendency to the ‘brand directivity’, ‘income directivity’ higher. Fifthly, the two groups showed higher rhetorical consumption tendency to the ‘brand directivity’, ‘income directivity’, and the ‘fashion directivity’ with the higher materialism inclination according to the psychological variables. Furthermore, the Korean subjects showed higher rhetorical consumption tendency to the income directivity with the increasing of their self-worth. Sixthly, the Korean subjects from the natural sciences department showed lower ‘fashion directivity’ than other undergraduates. On the contrary, the rhetorical consumption tendency to the ‘income directivity’ and ‘fashion directivity’ were increased by the means of consumer education from the consumer-related organization. To the Chinese subjects, the rhetorical consumption tendency to the ‘fashion directivity’ was increased via the consumer education from the consumer-related organization. On the other hand, the consumption tendency increased with the higher materialism inclination
Bee Venom Decreases LPS-Induced Inflammatory Responses in Bovine Mammary Epithelial Cells
( Chang Hee Jeong ),( Wei Nee Cheng ),( Hyojin Bae ),( Kyung Woo Lee ),( Sang Mi Han ),( Michael C. Petriello ),( Hong Gu Lee ),( Han Geuk Seo ),( Sung Gu Han ) 한국미생물생명공학회(구 한국산업미생물학회) 2017 Journal of microbiology and biotechnology Vol.27 No.10
The world dairy industry has long been challenged by bovine mastitis, an inflammatory disease, which causes economic loss due to decreased milk production and quality. Attempts have been made to prevent or treat this disease with multiple approaches, primarily through increased abuse of antibiotics, but effective natural solutions remain elusive. Bee venom (BV) contains a variety of peptides (e.g., melittin) and shows multiple bioactivities, including prevention of inflammation. Thus, in the current study, it was hypothesized that BV can reduce inflammation in bovine mammary epithelial cells (MAC-T). To examine the hypothesis, cells were treated with LPS (1 μg/ml) to induce an inflammatory response and the antiinflammatory effects of BV (2.5 and 5 μg/ml) were investigated. The cellular mechanisms of BV against LPS-induced inflammation were also investigated. Results showed that BV can attenuate expression of an inflammatory protein, COX2, and pro-inflammatory cytokines such as IL-6 and TNF-α. Activation of NF-κB, an inflammatory transcription factor, was significantly downregulated by BV in cells treated with LPS, through dephosphorylation of ERK1/2. Moreover, pretreatment of cells with BV attenuated LPS-induced production of intracellular reactive oxygen species (e.g., superoxide anion). These results support our hypothesis that BV can decrease LPS-induced inflammatory responses in bovine mammary epithelial cells through inhibition of oxidative stress, NF-κB, ERK1/2, and COX-2 signaling.
Innovative Design and Integrated Manufacturing Laboratory at Seoul National University
Sung-Hoon Ahn,Won-Shik Chu,Varsha Khare,Gil-Yong Lee,Wei Wang,Dong-Hyeon Kim,Sung-Ik Park,Min-Woo Han,Hyun-Taek Lee,Min-Cheol Kim,Jang-Yeob Lee,Hyung-Soo Kim,Min-Soo Kim,Kang-In Lee,Ying Jun Quan,Ji-H 한국생산제조학회 2016 한국생산제조시스템학회 학술발표대회 논문집 Vol.2016 No.10