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'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.
본 연구의 목적은 한국 의료관광의 현황에 대한 의료관광 전문가들의 인식유형을 발견하는 것이다. 의료관광 전문가는 의료관광 에이전시, 병원, 관련기관의 종사자를 비롯한 관련 연구자들로 선정하였다. 특히 본 연구는 인식분석에 있어서 개인의 주관적 특성을 규명하는 것으로 알려져 있는 Q방법론을 사용하였다. 분석 결과, 의료관광 전문가의 인식은 다섯 가지 유형으로 구분되었다. 제1유형은 의료관광의 제도적 기반이 미흡하다고 인식하고 있고, 제2유형은 한국의 우수한 의료에 대해 매우 긍정적인 태도를 가지고 있었으며, 제3유형은 의료관광에 있어서의 한방 활용을 강조하였고, 제4유형은 의료관광에 있어서의 의학적 접근 뿐만 아니라 관광학적 접근의 중요성을 피력하였으며, 제5유형은 의료관광의 전문인력 및 서비스 부족을 지적하였다. 이상의 연구결과를 바탕으로 한 의료관광 전문가의 견해는 한국의료관광의 향후 과제를 논의하는 과정에서 발전 방안을 위한 근거 자료로서 활용 가능할 것으로 생각된다. The purpose of this research is to analyze the perceptions of medical tourism professionals towards the current state of medical tourism in Korea using the Q-methology which has been known as a useful method to identify individuals' subjective characteristics and perceptions. The group of medical tourism professionals who contributed to this study includes members who work for medical tourism agencies, hospitals, administrative organizations, and academic researchers.The results revealed that the perceptions of medical tourism professional can be categorized into five groups : Type 1 recognized the unprepared legal system and the unestablished institutional framework for medical tourism ; Type 2 emphasized the competitiveness of high-level medical technique; Type 3 suggests to promote more of Korean traditional medicine ; Type 4 offers to promote medical tourism from the aspects of both medical approach and tourism approach ; Type 5 finds the need for the improvement of medical environments including hospitality and specialists of medical tourism. The above results of this study provide the basic data for developmental suggestion by understanding the professionals' subjective attitudes and views on medical tourism.
Medical tourism is one of the fastest-growing businesses. Health perception is one of most important factor for understanding medical tourism. The purpose of this research is to analyze the effect of health perception on medical tourism intention of Korean residents in Indonesia. This study also intends to test the moderating role of enjoyment on the relationship between health perception and medical tourism intention. For this study, health perception was explained by the concept of “Health Belief”. Results of analysis indicates two factors of ‘Susceptibility' and "Benefits" respectably shows a positive significant influence on medical tourism intention of Korean residents in Indonesia. In the test of moderating effect, "Enjoyment" was found to have a significant positive moderating influence on the relationship among ‘Susceptibility', "Benefits" and medical tourism intention.
This paper deals with the flexural strengthening effect of reinforced concrete beams strengthened with CFRP Plate(Carbon Fiber Reinforced Polymer Plate). Ten strengthened RC beams (including control beam) were experimentally evaluated to determine improvements in flexural strength. Test parameters in this experimental study are strengthening types(B, U, E Type), steel ratio(=0.0096, =0.015), preloading, an interval of stirrup (@100, @300) and strengthened length of CFRP Plate (2064㎜, 2580㎜). RC beams strengthened with CFRP Plate were tested under the combined control of load. Considering strengthening types and strengthening methods of CFRP Plate, flexural capacity and failure mode of test specimens were evaluated. The results show that flexural capacity of beams strengthened with CFRP Plate is about 21%~117% in all strengthening parameters higher than that of control beam. Additionally, experimental results are compared with theoretical results available in the literatures and good agreement is observed.
Researches on electrochemical CO2 conversion into useful hydrocarbon fuels have emerged as one of the promising CO2 reduction methods to mitigate green house effects. In the electrochemical CO2 conversion reaction, the selection of catalyst is recommended prior to determine other reaction parameters, because the CO2 conversion efficiency is significantly influenced by the performance of a selected catalyst. To understand CO2 conversion mechanisms on various catalyst such as Cu, Au, and Pt, in this study the reaction limiting step and energy barrier of intermediate products of existing CO2 reduction reactions were calculated using density functional theory (DFT). The DFT calculation revealed that the lowest energy barrier was found in Pt (0.35eV), but the CH4 production was low. Au turned out to be the least efficient catalyst among three metals due to the highest energy barrier (0.63eV) and the high production of intermediate products. Although the energy barrier of Cu (0.50eV) was higher than that of Pt, the surface of Cu was revealed to be most efficient in the generation of CH4. The results of this study would provide useful basic information for the development of a new catalyst in electrochemical CO2 conversion.
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목적 환자의 선량을 저감하기 위한 방법의 일환으로 AEC를 이용한 흉부 CT검사에서 이물질이 있는 Topogram이 선량에 미치는 영향에 관해 연구하고자 한다. 대상 및 방법 SIEMENS SOMATOM definition AS+장비를 사용하였고 인체 모의체, 500원 동전 4개, 휴대폰, 벨트를 이용하였다. 이물질을 상의 주머니에 위치시켜 Topogram을 촬영하고, 이물질을 제거한 후 각각 10번씩 Scan하여 Dose Report 상의 CTDIV, DLP를 값으로 선량증가율을 알아보고 인체 모형 모의체에 유리선량계를 배열하여 이물질 부위의 주요장기의 흡수선량을 알아본다. 결과 Topogram에서 이물질의 두께나 밀도, 크기가 클수록 유효선량이 증가하였으며, Scan range 밖에 이물질이 있을 경우에도 없을 때와 비교했을 때 선량이 증가 하였다. 특히 남성의 Chest CT검사 시 Scan range 안에 휴대폰이 있을 경우 10% 정도로 크게 선량이 증가하였다. 이물질이 있는 level의 주요장기의 흡수선량은 크게는 42% 정도 선량이 증가하였다. 결론 AEC를 적용하는 검사에서 이물질이 Topogram상에 나올 경우 진단에 필요한 선량 외에 환자의 불필요한 선량증가를 가져오기 때문에 이물질의 유무를 검사 전 확인하고 Topogram에서 이물질이 있는 경우에는 Topogram을 재촬영 하여 검사할 것을 제안한다. Ⅰ. Purpose Chest CT scan using the AEC, Want to study about the impact on dose for foreign object topogram to methods for reducing patient dose. Ⅱ. Meterial and Methods Human phantom was used on the Siemens SOMATOM definition AS+ equipment, 500-won coin, cellular phone, belt were used. Position taken by topogram a foreign object upper in a pocket remove foreign object, and 10 times each of the scan, dose report on CTDIv, DLP examines the relationship of organ doses and dose growth and foreign object of the major organs in the area through the human body phantom. Ⅲ. Result Of foreign object size, thickness or density, the larger the effective dose is increased. The dose was increased when compared with if there is a foreign object outside of Scan range. Men's chest CT Scan 10% significantly increased dose for cellular phone inside of Scan range. Level of foreign object in the major organs of the absorbed dose is 42% of the dose was increased. Ⅳ. Conclusions CT scan using AEC, If found to be a foreign object in topogram caused unnecessary dose increase. Therefore suggest that Topogram retake the examination.
This paper deals with the shear strengthening effect of reinforced concrete beams strengthened with CFRP Plate (Carbon Fiber Reinforced Polymer Plate). Eleven strengthened RC beams (including control beam) were experimentally evaluated to determine improvements in shear strength. Test parameters in this experimental study are strengthening ratios (22%, 33%), strengthening methods of CFRP Plate (I, X type), existence and nonexistence of Preloading, Steel ratios (ρ=0.015, ρ=0.021), and strengthening methods of CFRP sheet (I, U type). RC beams strengthened with CFRP Plate were tested under the combined control of load. Considering strengthening ratios and strengthening methods of CFRP Plate, shear capacity and failure mode of test specimens were evaluated. The results show that shear capacity of beams strengthened with CFRP Plate is about 35.4%~94.6% in all strengthening parameters higher than that of control beam. and we did compare experiment results with used equation.
연료전지에서의 전체 반응 속도는 산화전극에서 일어나는 수소산화반응에 비해 그 반응 속도가 현저히 느린 환원전극에서의 산소환원반응(oxygen reduction reaction, ORR)에 의해 결정된다. ORR 효율성 평가를 용이하게 하는 지표(descriptor)로서 촉매 표면에서의 산소원자 흡착강도를 활용하는데, 산소흡착강도는 촉매 표면의 기하학적 구조 변형에 따른 전자구조를 변형함으로써 조절할 수 있다. 이에 본 연구에서는 백금 표면의 원자모델을 이용하여 표면의 기하학적 구조가 산소흡착 강도에 미치는 영향과 그 원인을 밀도범함수이론(density functional theory, DFT) 계산을 통해 분석하였다. 먼저, 기하학적 구조를 인위적으로 변형시킨 Pt(111) 표면에서의 산소흡착반응을 밀도범함수이론 계산을 이용해 분석함으로써 기하학적 구조 변화가 산소흡착강도에 미치는 영향(strain effect)을 확인하였다. 최적화한 Pt 격자상수(3.977 Å)에 ±1% 간격의 변화율을 적용하고 각 변화율마다의 산소흡착강도를 계산하였는데, Pt-Pt 원자 간 거리가 멀어질수록 산소흡착강도가 강해지는 것을 확인하였다. 이는 원자 간 거리가 증가할수록 d-band center가 페르미 준위(Fermi level)쪽으로 이동하게 되며, 이로써 일부 반결합 오비탈(anti-bonding orbitals)에 전자가 채워지지 않기 때문에 전체적으로 반결합 오비탈이 형성될 가능성이 적어지기 때문이다. 결과적으로, 순수한 백금이 가진 격자상수(3.9771 Å) 보다 약 2~4% 작은 백금 표면 격자크기를 가질 수 있도록 유도할 수 있다면 산소흡착강도가 적절히 약하게 조절될 수 있으며, 이는 순수한 백금보다 더 향상된 ORR 성능을 가진 촉매물질 개발 연구를 위한 기초자료로서 활용할 수 있을 것이다. The overall reaction rate of fuel cell is governed by oxygen reduction reaction (ORR) in the cathode due to its slowest reaction compared to the oxidation of hydrogen in the anode. The ORR efficiency can be readily evaluated by examining the adsorption strength of atomic oxygen on the surface of catalysts (i.e., known as a descriptor) and the adsorption energy can be controlled by transforming the surface geometry of catalysts. In the current study, the effect of the surface geometry of catalysts (i.e., strain effect) on the adsorption strength of atomic oxygen on platinum catalysts was analyzed by using density functional theory (DFT). The optimized lattice constant of Pt (3.977 Å) was increased and decreased by 1% to apply tensile and compressive strain to the Pt surface. Then the oxygen adsorption strengths on the modified Pt surfaces were compared and the electron charge density of the O-adsorbed Pt surfaces was analyzed. As the interatomic distance increased, the oxygen adsorption strength became stronger and the d-band center of the Pt surface atoms was shifted toward the Fermi level, implying that anti-bonding orbitals were shifted to the conduction band from the valence band (i.e., the anti-bonding between O and Pt was less likely formed). Consequently, enhanced ORR efficiency may be expected if the surface Pt-Pt distance can be reduced by approximately 2~4% compared to the pure Pt owing to the moderately controlled oxygen binding strength for improved ORR.
Local cuisine has been one of many attractive elements, attracting tourists to tourism destination. Authenticity which means the unique local culture and history is reflected in local cuisine. The purpose of this study is to analyze the effect of service quality on satisfaction of tourists. This study also intends to test the moderating role of authenticity on the relationship between service quality and satisfaction. Results of analysis indicates 2 factors of "Tangibles" and "Empathy" respectably shows positive significant influence on satisfaction with local cuisine restaurants in Jeju. In the test of moderating effect, "Authenticity" was found to have a significant positive moderating influence on the relationship between service quality and satisfaction. "Tangibles" and "Empathy" are important factors in a case of group who perceive authenticity of local cuisine restaurant highly.
안영민 ( Young Min Ahn ), 조경기 ( Kyung Gi Cho ), 이창미 ( Chang Mi Lee ), 방종희 ( Joung Hee Bang ), 류명이 ( Myung Yi Ryu ), 김세중 ( Se Joong Kim ), 서혜영 ( Hae Young Suh ), 김승업 ( Seung Eop Kim ) 대한뇌종양학회 2006 대한뇌종양학회지 Vol.5 No.2
Introduction : Despite the advanced neurosurgical techniques and various multimodal therapeutic approach have been developed for malignant gliomas, these can not save the patients from the tumors due to infiltrating behavior of glioma cells. Here the authors investigated the possibility of treatment for the malignant gliomas with neural stem cell(HB1.F3) transduced with suicidal gene using the tropism of stem cells. Materials and Methods : E.coli cytosine deaminase(CD) is an enzyme that catalyzes the conversion of noncytotoxic 5- FC to the cytotoxic and radiosensitizing drug 5-FU. Cytotoxic 5-FU and its toxic metabolites can readily diffuse into surrounding tumor cells giving CD. HB1.F3 were transduced with retroviral vectors expressing the E.coli CD. Rats were implanted with U373MG, U251MG human glioblastoma(hGM) cell line and F3/CD were injected directly into the tumor mass 6 days later. The rats with tumors were injected IP 5-FC or saline daily for 7 days since 6 days after implantation of tumors. Results : HB1.F3 which were injected into the contralateral hemisphere to the tumor implantation site migrated through the corpus callosum to the tumor cells 3 days after hGM transplantation . The growth inhibition of 5-FU treated cells in comparison to untreated controls was remarkable in vitro. The tumor mass in the rats with transplantation of F3/CD were reduced markedly in size comparing to that with F3 after injection of 5-FC . Conclusions : The human neural stem cells can trace to the glioma cells in the rat brain. 5-FC systemic treatment with direct transplantation of F3/CD reduces tumor size. Our data indicates that suicide gene therapy using neural stem cells would be promising as a new therapeutic approach for malignant glioma.
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Purpose The abdomen aorta computed tomography(CT) is uncomfortable to examinee, because of quickly injection of contrast media. So purpose is to adjust a present day's dye amount, result from to decreased scan time for introducing the dual source CT. Materials and methods In the patients were prescribed abdomen aorta CT at this hospital from September 17th 2009 to February 22th 2010, we collected group A of 50 persons were used to dye of 12o±10ml, group B of 50 persons of the fresh amount to calculate and gained a distribution of each range, also the time of range with group A. In succession, we counted average moving time of dye from injection point to starting point of abdomen aorta+breath-hold time and the time required from enhance point to end of scan, so computed the optimum amount of dye & saline for scan and applied the figures targeting group B. Results We compared the group B and the group A, they are little difference in CT numbers. Ultimately, the exam is impossible to decrease dye of 33~45% than former amounts. Conclusion Through the research, we can decrease dye amounts for quickening scan time. It can make a positive influence to radiologist and patients, and anticipate the effect to cost reduction of dye.