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      • KCI등재

        Effects of Mold Growth on Building Materials by Different Environments in Taiwan

        An Cheng,Yu Hsin,Wei-Ting Lin 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.4

        The main of study is to investigate the effect of moisture variation and micro-structure on the growth mold at surface of buildingmaterials. The two different water-cement ratio of mortars (w/c = 0.4, 0.6), brick and tiles were used in this study. The mercuryIntrusion Porosity-Meter (MIP) was used to determine the pore distribution of building materials. The moisture variation of materialswas recorded in constant climate chamber (25oC, relative humidity 80%), general indoor environment (28oC, relative humidity 55%)and water damage simulation environment. The results indicated that the pore size and distribution will affect the surface water ratioand moisture content of materials. The surface water ratio of specimen was affected by different environment seriously. The surfacewater ratio was an important factor in mold growth.

      • COMMUNITY PARTICIPATION IN AND BENEFITS OF TOURISM DEVELOPMENT IN THE TURPAN VALLEY, XINJIANG AUTONOMOUS REGION OF CHINA

        Cheng,Soo May,Yang,Li,Dong,Lin 세계문화관광학회 2007 Conference Proceedings Vol.8 No.0

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        While western scholars such as Jamal and Gertz (1995), Tosun (2005), Fallon and Kriwoken (2003), usually presume that community participation is critical to sustainable tourism development, Chinese scholar Wenjun Li (2006) boldly states that it is possible for a community to achieve benefits of tourism development despite weak involvement in the planning and management of a tourist destination. Our survey of government officials, tourist business operators and residents in seven locations in the World Heritage-listed Turpan Valley in the Xinjiang province found that top-down, government-led participation is necessary and desirable, and does not detract from stakeholders' perception that they are sharing in the benefits of tourism development in the region.

      • KCI등재

        Effects of Neodymium and Calcium on the Thermal Stability of AZ71 Magnesium Alloys

        Cheng‑Feng Yue,Shi‑Jei Huang,Jhewn‑Kuang Chen,Hsien‑Tsung Li,Kam‑Shau Chan 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.2

        The effects of an addition of 0–2 wt% Nd on thermal stability of 0–3 wt% Ca-containing modified AZ71 magnesium alloyswas investigated. The ignition temperature was found to increase from that of AZ71, 574, to 825 °C with the addition of0.5 wt% Ca and 1 wt% Nd. The ignition temperature was further increased to 1114 °C when 3 wt% Ca was added. The CaandNd-added AZ71 was isothermally maintained at a temperature of 500 °C in air for 12 h. The MgO–CaO–Nd2O3 formedon the surface to improve the thermal stability of the AZ71–xCa–yNd alloys. While both the tensile strength and ductilitydecreased with the Ca concentration in the alloy, an addition of 1 wt% Nd was found able to alleviate the degradation effectsof Ca on the tensile strength and ductility at 170 °C. Both solid solution formation and precipitation strengthening contributedto the increase in toughness. AZ71 containing 0.5–2 wt% Ca and 1 wt% Nd provides the optimum combination of ignitionresistance and mechanical properties.

      • KCI등재

        Study on the Effectof Antitumor of the Agaricus blazeiMurill Medicinal Culture Medium

        Cheng,Cui-Ji 한국자원식물학회 1998 한국자원식물학회지 Vol.11 No.4

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

      • KCI등재

        〈申屠澄〉研究

        程小花(Cheng, Xiao Hua) 중국인문학회 2014 中國人文科學 Vol.0 No.57

        〈申屠澄〉은 唐나라 傳奇 중 완성도가 비교적 높은 작품이지만 기존 연구에서는 그리 주목받지는 못했다. 따라서 〈申屠澄〉에 대해 다시 살펴볼 필요가 있다. 우선 〈申屠澄〉과 같은 시기에 나온 유사 작품인 〈崔?〉, 〈天??人〉과 비교, 분석을 하였는데, 이 작품은 〈崔?〉, 〈天??人〉, 그리고 《搜神?》에 수록된 〈毛衣女〉의 서사구조와 별 차이가 없음을 알 수 있다. 이 작품들 모두 ″?衣--藏衣--??--?衣--回?″라는 비슷한 순차 구조로 되어 있을 뿐 아니라, 더 나아가 ″금기?금기 파괴?징계″의 구조를 갖추고 있는 것으로 이해할 수 있다. 〈申屠澄〉은 이러한 서사구조를 한 층 더 발전시켜, 작품의 기본적인 틀에는 변화를 주지 않으면서 금기 내용을 숨긴 채, “금기파괴?징계” 부분 서술에 집중하였다. 그리고 그 중에서도 “징계”를 위주로 서술하였다. 이러한 구조는 “奇”의 특성을 교묘하게 부각시켰다고 할 수 있다. 〈申屠澄〉의 예술적 성취로는, 먼저 사람과 호랑이가 서로 사랑에 빠지는 과정을 크게 서술함으로써 호녀를 청아하고 아름다운 팔방미인으로 묘사했다는 점이다. 신도징과의 결혼생활에 대해서도 환상적으로 묘사하여, 현모양처로서의 虎女모습이 생생하게 드러났다. 또한 虎女와 申屠澄의 이별도 애잔함을 불러일으킨다. 작품 전체에 걸쳐 세세한 묘사와 시를 읊고 노래 부르는 것이 분위기를 조성하는 데 일조하여 낭만적이면서도 애절한 호녀의 사랑이야기를 만들어 내는 데 성공했다. 〈申屠澄〉을 여러 측면에서 이해하기 위하여 〈金?感虎〉와도 비교하였다. 우선 〈金?感虎〉는 전반부에서는 육조지괴의 방식으로 남녀주인공이 첫눈에 반하여 정을 나누는 과정을 간략히 서술한다. 이 부분은 대체로 평범하여 〈申屠澄〉의 결연 부분 묘사보다 많이 뒤떨어진다. 하지만 〈金?感虎〉의 서사는 후반부에 중점을 두고 있다. 즉 金?과 虎女가 귀가 후 인간과 호랑이의 갈등, 虎族내부의 善? 갈등, 하늘과 악한 호랑이의 갈등이 짧은 시간에 격렬히 일어난다. 이로 인해 이 두 작품은 결구도 같지 않게 되었고, 서사도 달라졌다. 이렇게 〈申屠澄〉은 전반부의 결연을 위주로 다루고, 〈金?感虎〉는 후반부에서 세 가지 중첩된 갈등을 해결하는 데 중점을 두어 작품 구조와 서사방식에서 엄연히 차이가 있다. 그래서 이 두 작품을 비교할 때에는 적합한 지점을 선택할 필요가 있는데, 그 중 호녀의 이미지는 비교하기에 적합하다. 〈申屠澄〉은 호녀의 人性을 위주로 다루되 호녀의 物性(동물성)과 인성의 겨룸 끝에 동물성이 우위를 차지함을 보인 반면, 〈金?感虎〉는 호녀의 物性과 人性에 대한 묘사는 간략하다. 대신, 각종 갈등이 격화됨에 따라 호녀가 ?身成仁하고, 仁?를 다하는 모습에서 그 인성이 최대한으로 부각됨을 알 수 있다. 그래서 〈申屠澄〉은 호녀의 人性을 부각시키기 위해 호녀의 형상을 세세하게 묘사한 반면, 〈金?感虎〉에서는 호녀의 人性과 物性은 간략하게 묘사하고 오히려 超人性(인성의 극치)을 뚜렷이 드러내었다. 작자는 호녀의 입을 빌어 자신의 이념을 전달하고자 했던 것이다.

      • SSCISCOPUSKCI등재

        Women in Public Spaces : Theater, Modernity, and Actresses in Early Twentieth-Century Beijing

        Weikun CHENG Ewha Womans University Press 2003 Asian Journal of Women's Studies(AJWS) Vol.9 No.3

        In the male-dominated theatrical world of early twentieth century China, actresses strategically relied on personal connections to survive. As "public" women and agents of mass media, they were utilized by men for different purposes. Theatrical managers and male audiences were intent on turning actresses into sexual objects in licentious plays, whereas nationalist reformers recruited actresses for mass mobilization. Actresses participated in the nation-building cause by presenting diverse human roles via the stories that either conveyed new idecologies or historical values. The fictional plots of women's emancipation, however, provided a learning process in which actresses could adopt the concepts of personal rights, self-determined marriage, and economic autonomy. The Chinese states, despite minor variations, always sustained ideals of gender distinctions and opposed or restrained women's public roles. The stories of actresses' survival and prosperity, nonetheless, demonstrated the tremendous endurance, flexibility, intelligence, and strength of Chinese women.

      • Full-space Cloud of Random Points with a Scrambling Metasurface

        Li, Zile,Dai, Qi,Mehmood, Muhammad Q.,Hu, Guangwei,yanchuk, Boris Luk’,Tao, Jin,Hao, Chenglong,Kim, Inki,Jeong, Heonyeong,Zheng, Guoxing,Yu, Shaohua,Alù,, Andrea,Rho, Junsuk,Qiu, Cheng-Wei Nature Publishing Group UK 2018 Light, science & applications Vol.7 No.1

        <▼1><P>With the rapid progress in computer science, including artificial intelligence, big data and cloud computing, full-space spot generation can be pivotal to many practical applications, such as facial recognition, motion detection, augmented reality, etc. These opportunities may be achieved by using diffractive optical elements (DOEs) or light detection and ranging (LIDAR). However, DOEs suffer from intrinsic limitations, such as demanding depth-controlled fabrication techniques, large thicknesses (more than the wavelength), Lambertian operation only in half space, etc. LIDAR nevertheless relies on complex and bulky scanning systems, which hinders the miniaturization of the spot generator. Here, inspired by a Lambertian scatterer, we report a Hermitian-conjugate metasurface scrambling the incident light to a cloud of random points in full space with compressed information density, functioning in both transmission and reflection spaces. Over 4044 random spots are experimentally observed in the entire space, covering angles at nearly 90°. Our scrambling metasurface is made of amorphous silicon with a uniform subwavelength height, a nearly continuous phase coverage, a lightweight, flexible design, and low-heat dissipation. Thus, it may be mass produced by and integrated into existing semiconductor foundry designs. Our work opens important directions for emerging 3D recognition sensors, such as motion sensing, facial recognition, and other applications.</P></▼1><▼2><P><B>Metasurfaces: scrambling light for 3D detection and recognition</B></P><P>Firing light at a manufactured 'metasurface'—one carrying patterns at a smaller scale than the wavelength of the light—fills large volumes of space with defined points of light, potentially improving 3-D recognition and sensor applications. Cheng-Wei Qui and colleagues at the National University of Singapore, with co-workers across Asia and in the USA, created their unique metasurface from amorphous silicon. Light is scattered from and transmitted through the material to generate a cloud of data points in the surrounding space in which the structure and motion of objects under study can be analyzed. The initial development work with this “scrambling metasurface” suggests it could improve pattern recognition, including face recognition, motion detection and augmented reality applications. The researchers describe how their innovation overcomes significant limitations of existing methods in these fields.</P></▼2>

      • SCIESCOPUSKCI등재후보

        Numerical simulation of columns with un-bonded reinforcing bars for crack control

        Chen, G.,Fukuyama, H.,Teshigawara, M.,Etoh, H.,Kusunoki, K.,Suwada, H. Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.26 No.4

        Following previous work carried out in Building Research Institute in Japan, finite element analyses of conceptual column designs are performed in this paper. The effectiveness of the numerical model is evaluated by experimental tests and parametric studies are conducted to determine influential factors in conceptual column designs. First, three different column designs are analysed: bonded, un-bonded, and un-bonded with additional reinforcing bars. The load-displacement curves and cracking patterns in concrete are obtained and compared with experimental ones. The comparisons indicate that the finite element model is able to reflect the experimental results closely. Both numerical and experimental results show that, the introduction of un-bonded zones in a column end can reduce cracking strains, accordingly reduce the stiffness and strength as well; the addition of extra reinforcement in the un-bonded zones can offset the losses of the stiffness and strength. To decide the proper length of the un-bonded zones and the sufficient amount of the additional reinforcing bars, parametric studies are carried out on their influences. It has been found that the stiffness of un-bonded designs slightly decreases with increasing the length of the un-bonded zones and increases with the size of the additional reinforcing bars.

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