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龍溥重 慶一大學校 1997 論文集 Vol.14 No.2
A contour-following system using an accommodation force control is modeled. The performance of this system is improved by an optimal preview control, which anticipates a future disturbance information. This study presents how to utilize the local future information obtained by the finite preview to minimize optimality criterion evaluated over a problem duration. Simulation results are given based on an industrial robot system.
손용석,한부학 한국인터넷비즈니스학회 2001 인터넷비지니스연구 Vol.2 No.2
본 연구는 소비자가 PC통신을 사용한 결과 발생한 부산물인 클릭스트림 테이터(clickstream data)를 이용하며 온라인(on-line) 상에서 발생되는 구매자와 비구매자간의 차별적 특성에 관하여 파악하고자하는 의도에서 시작되었다. 클릭스트림 데이터는 온라인 네트웍 상에서 사용자가 방문한 페이지들외 순차와 각 페이지에 소비된 시간들을 포함하므로, 사용자들에 대한 정보탐색정보를 제공한다. 따라서 일정한 기간의 데이터를 확보한다면 특정한 사이트를 방문하는 소비자의 행위를 분석라여 특정 제품의 구매를 예측하는 연구가 가능하리라 생각된다. 이 논문에서는 클릭스트림 데이터 사용의 중요성을 강조하기 위한 시금석적인 실증 연구를 시도한다. 즉, PC통신의 현황, 서비스 내용, 사용자수 및 매출액규모 등을 시장성(marketability)의 관점에서 분석하기 위해 PC통신 사용자 중에 온라인 비구매자로부터 온라인 구매자로 전판을 예측하게 하는 변수를 파악하기 위해, PC통신 사용자들을 온라인 상에서 제품을 구매라는 집단과 구매하지 않는 집만으로 나누어 인구통계변수 및 PC통신을 사용하는 정보탐색변수를 중심으로 두 집단간의 차이를 분석하는 이분화 연구(dichotomous study)를 시도한다. 방법론으로 두 집단간의 평균차이를 비교하는 일변량 분석과 로지스틱 회귀분석을 사용한다. We began the study in order to analyze characteristics differentiated between on-line and off-line purchases by using the clickstream data occurring as a byproduct resulting from consumers' usage of PC telecommunication. The clickstream data includes information on the sequence of pages visited and time consumed on each page, which is expected to provide demand forecasting on the particular product if consumer behavior visiting a particular site is studied. We have performed an empirical study with demographics and information search variables to characterize a difference between on-line and off-line purchase3. Univariate and logistic regression analyses are employed.
이부용 신한영미어문학회 1994 새한영어영문학 Vol.31 No.-
The unlimited expression of selfconsciousness together with the basic theme of theatricality is a characteristic of Stoppard's early plays, particulary Travesties. This theatricality appears through the relation between play and life, The so called play-life metaphor. The metaphor in this play in particular is related to the theatricality of history. The elements of theatricality that Tom Stoppard employs break with the historical facts. The disruption of the actuality of the past serves the function of focussing on the "reality" of theatrical life as opposed to the "illusion" of real life. Accordingly the theatre is used as a metaphor to expose the human tendency to turn illusions into realities and vice-versa. From this point of view Stoppard presents the theme of imaginative fantasy and reality as historical and artistic experience. It can be concluded that Travesties has considerable distinctions compared with former playwriting methods in that the play deals with certain historical characters with a background of historical events. Throughout the play is contained a philosophy concerning historical acts. Once done, an ant ceases to exist except in re-creation .In relation to theatricalism the play makes good use of intertextualities and extends its realm into the field of art criticism.
콘크리트 강도에 미치는 기후의 영향 : 수원 지역을 중심으로
김용부 成均館大學校 科學技術硏究所 1991 論文集 Vol.42 No.1
This paper describes an investigation of concrete strength variation under Suwon climate. To know concrete strength, the tests were carried out on 100 × 200 - mm cylinders and 100 × 100 × 100-mm cubes at ages of 1, 2, 3, 7, 14, 28, 90, 180 and 365 days by the ultrasonic pulse-velocity method and of 28 and 365 days by the destructive method. The somewhat fluctuation of concrete strength was observed and an empirical formula for the strength prediction from pulse velocity are proposed.
潘鏞夫 新羅大學校 1985 論文集 Vol.18 No.-
Along the upper Yangsan River banks, Platforms morphologically similar to river terraces. The platforms which are located along the river banks in Korea are usually known as the river terraces. But the majority of these platforms lack evidences that they have been formed by the rivers, even though they are found along the river banks, in the shape of platforms. The purpose of this study formation of platforms-morphology and outcrops along the river sides. The target areas of this study has following characteristics; The slopes of this landform are changed as follows;rapid slope surface, gentle slope and platforms. The platforms are located at the altitude of 30m∼140m, and large ones are found along the convex banks, and their slopes are 1°∼3°in gradient. The depth(thickness) of deposited materials are 5m to 7m, and become thin downward to the river. As matrix, sands abound in the upper streams, silt and clay abound in the downstream. The diameter of materials which are composed of deposits is along coarser in the upper stream, and becomes finer the downstream. The roundness of rocks becomes very round toward the downstream. The depth of weathering front becomes lower toward the downstream and it is 3m to 5m below platform surfaces. All the baserocks are not the same level. The deposit materials of these platforms originated from the back mountains. Deposited materials are produced by congelifration and transported by massmovement of solifluction under periglacial environment, repetition of freeze-thaw. The surface of gentle slope had been eroded by rainwash, especially sheet erosion. The platforms are covered with a sliding materials. And these materials have eroded the gentle slope and platforms at first. The active erosion has resulted in formation of potholes, attrition of rocks and gradual lowering of the altitude of river beds in the direction of the upper stream. These phenomena are especially conspicuous toward the headstream from the knickpoint located near Tongdo Hotel. Generally the platforms were formerly, last interglacial period, old river beds, and recently have been eroding down along the Yangsan fault line, because of lowering down of sea level. The agency of platforms seems to be river terraces and climatic terraces. formed by river and climatic activities.
潘鏞夫 新羅大學校 1995 論文集 Vol.40 No.1
This study concerned with the landform changes of barrier islands around the Nakdong River mouth, especially before and after the construction of an estuary bank of the river. The results are as follows: 1. The landform changes of barrier islands; The barrier islands were first represented in Taedongyeojido(大東與地圖), one of the Korean old maps which published at 1861. since that time, new barrier islands have been developed, continuously. Myungho-do(1861), sinho-do, Taema-dung, Jinwoo-do(1904), Jangja-do(1916), Paekhapdung(1955), Sae-dung(1975), Hongti-dung(1983), Namusit-dun(1986), Chulsae-dung(1988) were formed, orderly(the do and the dung named barrier island). 2. In a view point of particle diameter of the sediments ; Mean particle diameter of the sediments are becomes coarser through the whole barrier islands except the Sae-dung. Transporting mechanism of the sediments is bouncing along the bed as saltation load. Degree of sorting was not much transformed but it changed from very well sorted to well sorted or mederately well sorted. The skewness of sediments were transformed from positive to negative. It means that the environment of sedimentation around Nakdong River mouth is changed from effect of the river(low energy) to effect of waves(high energy). 3. The distribution of natural vegetation;Species and intensities of vegetation on the barrier islands are increasing. The barrier islands aroung Nakdong River mouth shall growing up in the futur The direction of the growth is toward the East-Nakdong River, predominantly. The ratio of sedimentation will higher at Tadaepo and molwoondae areas.
潘鏞夫 新羅大學校 1986 論文集 Vol.21 No.-
This study intend to clarify geomorphic characteristics and geomorphic development of alluvial land form relating with natural environment of the Nakdong River mouth. The investigation is concern with landform classification, stratigraphic analysis, and restoration of the past sea level change, and make an analyis of component of sediment materials. Especially, this paper is focused on the distribution of grain size which deposited on the strface of the barrier islands. The rerults of this study are as follows: 1. The Nakdong delta consist with three different geomorphic units, those are the upper delta, the lower delta and the marginal deltaic basin. 2. The alluvium which consist of the Nakdong delta is about 60m thick. It had deposited after post glacial transgression. 3. The alluvium of the delta area is classified into, a) upper sand stratum: 2∼6m thick. b) clay stratum: 17∼27m thick. c) lower sand stratum: 4∼17m thick. d) sand and gravel stratum: 3∼16m thick. e) basal gravel stratum: 2∼6m thick 4. The hight of natural levee is 1∼4m, it consist of silty sand which transported by sliding or saltation. Back swamp is consist of clay which transported by suspension. 5. Upper delta is composed of interdistributary islands which developed along the river flow and lower delta is composed of beach-ridges on the Myongho island and tidal mud flat and barrier islands. Generally, barrier islands have developed almost at a right angle to the river flow. 6. Upper delta is influenced by fluvial processes and lower delta is largely influenced by wave, longshore current, and tidal current etc. 7. The most of alluvial materials are supplied by flood usually occurred from June to September. 8. The Sea-level of around the Nakdong River mouth at B.P 4500 years was above 5m and at B.P 3500 years was above 7.5m and at B.P 1700 years was above 6.5m of the present sea-level. The Nakdong delta have had formed since B.P 1600 Years. 9. 28 families and 97 species of plants are growing on the barrier islands. Salsola komarovi, Cynodon ciactylon, and Carexpumila had invaded into the barrier islands as the pioneer plants. Sand dune formation and subsequent fixation accelerated by pioneer species. In the salt marsh, Carex scabritolia, Zoysia sinica, and Phragmites communities followed the pioneer species and play a role of same kind of the agent. The vegetation types of the Jangja island and the Baghapdeung were divided broadly into two groups; mixed plant community of sand dune vegetation dominated by Cynodon, Lathyrus Japonica and Oenothera odorata, and salt marsh vegetation dominated by Carex scabrifolia, Phragmites communities and Zoysia sinica. The vegetation of the Saedeung and the Namusitdeung were limited in the centeral parts because of ecological performance was so early and very poor compared with those of the Janja island and the Baghapdeung. Barrier islands had developed the Jangia island, the Baghapdeung, the Namusitdeung, the Saedeung orderly. 10. During flood times, most of the Nakdong River sediments are discharged out of the river mouth by suspension and bed load. And then the suspended load discharged into the Korea strait and the bed load deposited near the barrier islands. In no flood time, the coarse materials of the bed load deposited at the barrler islands by wave activities, and the finer ones deposited within the river mouth by flood tides. 11. The analyze of grain size in barrier islands sediments are as follows: The shapes of histogram for grain size distribution have single peak and are concentrated. It is noteworthy that since the materials hold finer grains, the shape of histogram enlongated tail to the right side. -------------------------------------------------- Saedeung Baghapdeung Namusitdeung -------------------------------------------------- Mø 1.5 2.4 2.46 SDø 0.36 0.33 0.4 SK -0.2 0.16 0.06 ------------------------------------------------- The grain size of the barrier islands distributed from 2ø to 4ø and the peak is 3ø. In the distribution curves of cumulative grain size on normal probability paper most deposits constitute with three straight segments which are: lower, middle and upper segments. These three segments were labelled as coarse, medium and fine population. It is that coarse population reflects rolling and sliding, medium population reflects saltation, and fine population reflects suspension mechanism, respectively.
金容孚 成均館大學校 1982 論文集 Vol.32 No.-
The results of tests, carried out on strengths of ordinary portland cement mortars made with six commercially available cements which are produced by six different companies, are discussed in this paper. The tests are for modulus of rupture and compressive strengths of ordinary portland cements at test ages of 3, 7, and 28 days with water cement ration of 0.65, 0.55 and 0.45 at each test age.
박부근,이일용 中央大學校 韓國敎育問題硏究所 2004 韓國敎育問題硏究所論文集 Vol.- No.19
본 연구는 2003년 12월 31일자로 제ㆍ개정된 청소년 관련법과 기존 청소년기본법의 비교연구를 통해 개정내용과 과정에 대해 분석하려는데 목적을 두고 있다. 개정된 청소년기본법이 청소년활동진흥법과 청소년복지지원법으로 확대 제정되었으며 청소년보호법과 함께 법률체계를 구비함에 따라 새로운 청소년 관련법의 내용분석은 청소년육성정책의 방향을 파악하는데 중요한 의미를 가지고 있다. 특히 청소년 관련기관과 전문가의 협조아래 입법부의 발의에 의해 개정과 제정을 거친 새로운 청소년 관련법은 국민제안 형식의 법률인 점에서도 그 의의를 찾을 수 있다. 이번에 제 개정된 청소년 관련법에는 과거에 없던 청소년의 정책제안이나 청소년시설의 설치에 대한 참여를 현실화하였고, 청소년단체가 학교교육을 보완하는 기능이 있음을 명시하였다. 특히 청소년활동을 지원하는 한국청소년센터의 설립과 청소년에게 질 높은 수련프로그램을 제공하기 위한 수련프로그램 인증제도의 도입은 관련법의 시행이후 현재 학교가 실시하고 있는 수련활동의 질적인 변화를 예고하고 있다. 또한 청소년 관련법의 시행령과 시행규칙이 1년 이내에 제정되어야 하는 만큼 그 연구와 제정방향을 나름대로 제언하려고 하였다. This study focuses on the comparison and analysis of the key articles of the previous Youth Law with the amended one. The National Assembly adopted the basic system of Youth Law on Dec. 31. 2003, which includes the items such as the promotion of youth activities, welfare programs and projects for youth facilities. The political reason why the Youth Acts had to be amended arose from the recognition of ambiguous development concept of the old law. The old Acts emphasized the importance of training activities excessively, but neglected the programs and matters of welfare for the youth. The promotive and protective policies were dealt separately by different governmental divisions and controled under separate rules. This enacted law is well-organized and allows young people to participate in the policy-making process about their programs and facilities. National and local governments have to be responsible for the financial stabilization for youth activities. Also the head of the administration becomes to establish the basic promotive policy and the success of the amended Youth Law will depend on the effective connection between school education and outdoor-school education. Therefore, as enacting the subordinate regulations for the Youth Law, they should carry out a thorough study in advance with the collection of various opinions from experts of the related youth organizations, young people and a public hearing. Also they need harmony and cooperation with each governmental division.