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WWW(World-Wide Web) created by CERN in Swiss is a grand scale hypermedia information system. Web application technology has been made rapid progress by adapting the standard agreements(URL, HTML. HTTP) and appearing commercial web-browsers which are convenient to use and have various kinds of functions. In recent years, the development of commercial or educational internet multimedia contents is pressing question in the area of revolutional communications net. In this paper, several multimedia techniques which make web sites efficiently are examined, and the prototype of multimedia contents which can be used in the educational websites is presented.
Through the dramatic growth of Internet, it becomes easy for people to access geographically distributed vast amounts of information. But, currently Internet is suffering from problems such as server overload, network congestion and client response time. In addition, currently the number of continuous media data such as audio and video is growing rapidly. In this paper, we propose SCU(Smallest Caching Utility) proxy caching scheme that stores a portion of continuous media stream or entire stream on the Internet. The proposed scheme reduces client latency and maximizes the amount of data served directly from cache without accessing the central server. By caching the initial fraction of stream data, service startup latency can be reduced. And, by varying the size of the fraction of stream to be cached according to variation of stream popularity, we can utilize the cache space efficiently and maximize the amounts of data served directly from cache. We use the caching utility formula of each stream for the measurement of cache replacement. The way to measure popularity of continuous media stream should be different from that of traditional data such as text and image. We propose the method of measuring popularity of stream using the amounts of data played by clients. We have performed simulations to evaluate our caching policy, Simulation results show that our caching policy outperforms other caching algorithms such as LRU, LFU and SIZE in aspects of BHR(byte hit ratio), initial latency and replacement overhead.
To redevelop the superannuated apartment estate premising the substantial solving all the Problems about its redevelopment contributes to urban regeneration. They are as followings. First, it contributes to the revitalization of economy through creating the effects of income creation, job creation and added value one. Second, it brings the effect to promote the housing quality level by a thorough rearrangement about the existing old estate. Third, it creates the effects of housing supply in large scale to such a region in acute housing shortage. Fourth, the comprehensive housing environment is improved in amenity and convenience by furnishing facilities for scenery, recreation, welfare and living convenience within the apartment estate. Fifth, the possibility' to create new identity in residential culture can be created by redistributing the population socially on the base of succession over the pre-existing cultural identity. Last, it eventually leads to the effect to enhance the inhabitants' self-pride and self-satisfaction by promoting their quality of life.
연속미디어 데이터를 인터넷을 통해 서비스하기 위해서는 서버의 과부하, 네트워크의 혼잡, 사용자에 대한 응답시간 지연 등의 문제를 해결하여야 한다. 본 논문에서는 연속미디어 프록시 캐쉬에서 데이터를 관리하는 PPC(Popularity-based Prefix Caching) 기법을 제안한다. 사용자 접근 패턴을 반영하는 PPC 기법은 객체들의 앞부분 데이터를 그 객체의 인기에 비례하여 캐슁함으로써 사용자에 대한 초기지연시간을 감소시키고, 캐쉬 공간을 효율적으로 활용하고자 한다. 연속미디어에 대한 사용자 접근의 특성이 이산미디어와는 상이하다는 점을 고려하여, 연속미디어의 인기도를 더욱 정확하게 나타내기 위해서 각 연속미디어에 대한 사용자의 재생 데이터 양과 접근의 최근성을 반영하는 인기도를 제안한다. 그리고 제안하는 기법의 성능을 평가하기 위하여 인터넷 방송국 VOD 서버의 로그 데이터를 이용한 트레이스 기반 모의 실험을 수행하였다. 그 결과, PPC 기법은 BHR, 초기 지연 시간, 재배치의 측면에서 기존의 LRU, LFU 캐슁 기법들에 비하여 성능이 향상되었고, 특히, 초기 지연시간과 재배치 오버 헤드의 감소 측면에서 매우 우수한 성능을 보였다. In this paper, we propose a proxy caching scheme that stores a portion of a continuous media object or an entire object on the Internet. The proxy stores the initial fraction of a continuous media object and determines the optimal size of the initial fraction of the continuous media object to be cached based on the object popularity. Under the proposed scheme, the initial latency of most clients and the data transferred from a remote server can be reduced and limited cache storage space can be utilized efficiently. Considering the characteristics of continuous media, we also propose the novel popularity for the continuous media objects based on the amount of the data of each object played by the clients. Finally, we have performed trace-driven simulations to evaluate our caching scheme and the popularity for the continuous media objects. Through these simulations, we have verified that our caching scheme, PPC outperforms other well-known caching schemes in terms of BHR, DSR and replacement and that popularity for the continuous media objects based on the amount of the playback data can enhance the performance of caching scheme.
연속미디어 데이터에 적합한 프락시 캐슁 기법을 연구하기 위하여 인터넷 상에서 서비스 되고 있는 비디오 데이터에 대한 사용자 엑세스 패턴을 분석하였다. 비디오 특성에 따른 인기도의 변화와 life cycle 을 분석하여 효율적인 프락시 캐슁 기법을 제안한다. 연속미디어 객체의 인기도에 비례하여 전체 또는 앞부분을 캐슁함으로써 클라이언트에 대한 초기지연시간을 감소시키고, 캐쉬 공간을 효율적으로 사용하면서 캐슁의 효과를 극대화 하고자 한다. 비디오의 aging을 고려하여 재 생량에 기반한 인기도를 계산할 수 있는 지수분포 모형을 제시하고 주기적으로 인기가 낮은 오브젝트를 인기가 높은 오브젝트로 대체해 나가는 방법을 제시한다. 제안하는 기법의 성능을 평가하기 위하여 인터넷 방송국 VOD 서버의 로그 데이터를 이용한 트레이스 기반 실험을 수행하였다. 그 결과, 제안하는 기법이 BHR, DSR, 재배치의 측면에서 기존의 캐슁 기법들에 비하여 전반적으로 우수한 성능을 보여주었다.
I analyzed the trends announced from ACSM and the present status of Pilates education. I also conducted questionnaire survey to suggest a scheme to promote Pilates education in South Korea. To invigorate Pilates’s competitiveness in fitness education industry, developing diverse programs reflected trends is essential to satisfy consumers’ needs. I studied on promotion of Pilates education in sports for all and sports for school. In sports for all, we should develop trainning programs for certified professionals and feasible programs for consumers. In sports for school, we need to develop group Pilates programs to quicken students’ interest and to correct posture.
PURPOSE AND METHOD (1) This study intends to examine the regional diffusion of Nam Yang Hong Clan (Hong Clan whose place of origin is Nam Yang, Kyunggi province) and discuss the origin, the regional structure arid the regional development of Nam Yang Hong clan village; Hongbeobri , S,uhshiri-myun , Whasung country , Kyunggi province Special emphasis is laid on the examination of characteristics of feng-shui aspect of burial grounds which induced colonization. (2) Settlement space is considered to be a symbolic space and the interpretation of the settlement landscape is needed. Accordingly this study is based on semantics and hermeneutics theory as well as objective spatial theory methodologically. (3) This settlement space was regarded as the reflections of the value system of the Yi dynasty's upper social groups. (4) Discussion is evolved by explaining that how the conflict between the need for livelihood base and the creation of meaning space did affect the regionalization process of settlement. (5) Research has been carried out by the participant observation in field work. And many records such as genealogy books of Nam' Yang Hong family, prose collections and authentic notes of ancient sage related with Hong family, literary remains of Ko-San , the Yi-dynasty's famous writer and geomancer, arid the town chronicles of the Yi dynasty are used for this study. CONCLUSIONS (1) The Nam Yang Hong name group is divided into two sub-groups: Tang Hong (Chinese Hong ) and To (ta)-Hong (native Hong). It is believed that two groups are the quite different families with same place of origin, but there are no proofs that support this fact. Tang Hong's first progenitor is said to be Chun Ha Hong who was a leader of 8 scholars came from Tang in 7th century. But on the clan genealogy Eun Yeol Hong , 11th son of first progenitor, is recorded as the progenitor of Tang Hong family. On the other hand, To-Hong's progenitor is said to be Sun Haeng Hong in Koryo dynasty, delayed 300 years by the former. This study concerns mainly the regional diffusion and settlement development of To-Hong's clan. (2) On the origin of clan village, it has been generally accepted by many scholars until now Geographical Journal of Korea, VoL 10. 1985. 12, pp. 383-424. that escape from the purge or retirement from the public life in Yi dynasty was the main reason. But in the case of Hongbeob-ri: To-Hong's clan village, although the clan was the meritorious family and many ancestors were the high officials in Yi dynasty, the area of cultivated land as livelihood base and village space are very narrow. The selection of village site was not carried out to seek after the land base for livelihood but to seek after the fortunate burial ground of upper classes in Yi dynasty. They believed that good burial sites could assure the prosperity of descendants. the formation of many traditional clan villages in that time was deeply related to the cult of ancestors. (3) The feng-shui aspect of this clan village is formed by Mt. Chung Myung (160 m) as a guardian mountain and two ridges streching from it. Narrow dissected valley is formed between the two ridges and this valley provides the basis of agricultural land use. This place was foretold by Ko-San (Yun Sun Do ) and other geomancers of Yi dynasty as the fortunate grave site which would produce 3 prime ministers and 8 ministers. Really ToHong family produced 2 prime ministers and 7 ministers in Yi dynasty. (4) The first settler of this village was the 9th son in descent from To-Hong fam>7y. He settled at village Keun-mal in about 1430. The most graves after 9th son of To-Hong family concentrate on the upper edge of the vlllage Keun-mal. About 150 graves including 12th son, Eeon Pil Hong and 13th son, Sum Hong that were the prime ministers at King Joong-jong and King Myung-jong in Yi dynasty respectively are located here. After the first village Keun-mal was settled, village Sambatgal , and village Moraeji were developed on the outskirts of the feng-shui aspect in turn according to population and the branch family growth. (5) 70 years between 9th son (about 1430) and 11th son (about 1500) in descent correspond to the phase of colonization and the following 400 years to about 1900 correspond to the phase of spread for the development of this settlement. During the spread phase, To-Hong family also diffused through the nation. After 1900, the abolishment of class distinctions and other mordernization measures resulted in the retard phase of development of village. (6) The spatial conflict relationships between the settlement space expressed by the feng-shui aspect as a mythical space and the weaknesss of the livelihood base caused by it might be considered as a specific fact which could affect the process of the regional development of the traditional Korean settlements.
오늘날과 같은 정보화 시대에 사회과 수업에서 교과서 중심의 수업이 갖는 어려움의 하나는 급속한 사회 변화를 수용하지 못하는 자료의 한계라고 할 수 있다. 매체로서 풍부한 현실 자료를 제공하는 신문은 교과서의 자료적 한계를 극복하는 주요한 수단이 될 수 있다. 이 연구는 신문자료를 활용하여 창의력 신장을 돕는 학습자료를 개발하고 이를 수업현장에 적용하여 봄으로써 중학교 사회과 수업에 있어 보다 효율적인 교수·학습 방법을 구안하고자 하는 목적에서 이루어졌다. NIE 수업결과 신문자료를 활용한 학습자료와 학습활동이 사회과 수업에 상당한 긍정적 효과가 있음이 확인되었다. 문제점은 신문자료 그 자체보다 논리적 사고를 통하여 자신의 의견을 피력하거나 토론 문화에 익숙하지 않은 점이 더 컸다. 그러나 이러한 점 역시 역설적으로 보다 적극적인 NIE 수업이 필요함을 말해준다. Although society has rapidly changed due to the development of information communication technology, in general, text books are short of recent data and information. Especially, this deficiency is so difficult for social studies course. Fortunately, the articles in newspapers can be important materials in teaching and learning social studies, because they have a lot of recent data and information. In this context, we developed NIE programmes for social studies course and analyzed their effects of students' learning activities in the middle school. NIE programmes was identified to have significantly positive effects on students' learning activities. What students were not skilled in discussion and logical thinking was more problematic rather than NIE programmes themselves. However, paradoxically the fact means that teaching and learning social studies needs NIE.