로봇 힘 제어를 위한 예견 제어의 효과

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.

PC통신 온라인 구매특성에 관한 실증적 연구

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.

비선형 시스템에 강인한 퍼지-PID 조합 제어기 설계에 관한 연구

조용성,이인용,한창훈,박재형,최부귀 東亞大學校 附設 情報通信硏究所 1999 情報通信硏究所論文誌 Vol.7 No.1

몬 논문에서는 통합형 퍼지-PID 제어기를 이요하여 비선형 시스템에 강한 제어기를 설계한다. 선형시스템에는 간단하고, 싸고, 좋은 성능 때문에 PID 제어기를 많이 사용한다. PID 제어기의 계수는 Ziegler-Nichols의 이론으로 결정하고, 비선형 요소의 제어를 위한 퍼지 제어기는 9게의 규칙만을 사용하였다. 이런 방법으로, 비선형 시스템에 대하여 보다 강인한 퍼지-PID 조합 제어기를 설계하여, 시뮬레이션 한 결과, 단순 PID 제어기보다 비선형 시스템에 대한 제어 성능이 좋음을 알 수 있었다.

Tom Stoppard의 初期劇에 나타난 삶의 演劇的 屬性

이부용 동아대학교 인문과학대학 영어영문학과 1997 동아영어영문학 Vol.13 No.-

Tom Stoppard's earlier major plays have a purpose in common, to emphasize the perception of the theatrical quality of the life wherein we would find its reality In the pursuit of this purpose, the writer establishes a new and valuable dramatic pattern which he creates by the imagination of another play's content, and not by simple adoption or imitation. This method, different from the customary one, derived from his opinion that the play does not imitate life but life should imitate theatre. In Rosencrantz and Guildenstern are Dead, a play basically concerning uncertainty in modern society, Stoppard recreates the offstage situation of Hamlet by means of the roles of Rosencrantz and Guildenstern, the minor characters of the play, into the leading ones in his play. In the long run, this work suggests a new possibility for man to confront the universal situation and at the same time give us hope through the so-called 'play-life metaphor' Stoppard insists that parody can produce a creative play. The Real Inspector Hound, among other plays, deeply deals with parody in using a play within a play. In this play, he undermines the barrier between art and life and attempts to show that life is as absurd as detective melodramas. Stoppard expresses his view about art most intensively through the work Travesties. Advancing the play to the level of criticizing art or artists, he extends his view of history as to a fiction of history. By the method dramatizing history, he attains his aim of finding out the reality of the world of the imagination. In the course of reconstructing history with the technique of fantasy, Stoppard creates a theatrical art and proves that historigraphy is also a kind of art. As mentioned above, Stoppard's three major early plays indirectly anyalize epistemological matters by the method of imagining and criticizing other works. The self-consciousness he utilizes for his analysis is an indispensable means of delivering and at the same time forming a thought. In this repect we can conclude that Stoppard created a unique dramatic method in which both the content and form simultaneously establish the subject of the play. In the meantime, he points out the illusionary knowledge about life, gives a lesson to us that as our life and reality itself are originally theatrical, we should after all find true reality in theatrical art. Ascertaining that theatrical quality of life is a standard for our behavior and judgement, Stoppard presents us with the possibility of enlarge- ing our life's scope.

과학경진대회의 문항과 분석과 학습지도 방안

이용복,배영부 서울교육대학교 과학교육연구소 1996 科學과 數學敎育 論文集 Vol.22 No.-

전치 유도각의 인위적 증가에 의한 저작근과 하악 운동 양상의 변화에 대한 연구

이용식,최대균,최부병 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

This study' was performed to measure the changes of the mandibular movement and the masticatory muscular activities anterior temporal and masseter muscle of both side - reflected by intentional increase of anterior guidance angle. For this study, 5 volunteers (3 males and 2 females with average age of 24.0) were selected. Each volunteer had Angle's classification I and did not have any missing tooth except third molar and any extensive restorations. Metallic guide plate was made at volunteer's working model fabricated by improved dental stone and cemented to the palatal surface of maxillary central incisor using resin cement(Panavia 21�) and then adjusted not to give any occlusal interferences at intercuspal position. The activity of masticatory muscles and the changes of mandibular movement were recorded by EMG and Sirognathograph in Biopak analysing system(Bioresearch Inc., Milwaukee, Wisconsin, USA). Measurement was done at before experiment, irnmediatley after placement, 1 week after placement, immediately after removal, and 1 week after removal. The results were as follows: 1. Moderate phonetic disturbance and mild headache were occured to 3 volunteers for 2 days after setting and l volunteer had positive reaction to percussion and slight midline diastema. But all of these clinical signs were diappeared 1 week after removal and the other volunteer did not have any special clinical sign. 2. In the EMG of the mandibular rest position, the mean value of anterior tempotal muscle was increased immediately after placement(p<0.01) and then decreased 1 week after placement(p<0.05) and increased 1 week after removal(p<0.05) but not recovered as before experiment. The mean value of masseter muscle was decreased during the experiment period: 3. In the EMG during mandibular protrusive movement, all muscular activity was decreased during the experiment period. Reduced activity was not recovered I week after? removal(p<0.05). 4. During the habitual opening, anteroposterior movement of mandible was decreased immediately after place ment(p<0.05) and then increased 1 week after placement but not statistically significant(p>0.1). Vertical movement was not shown significant difference during the experiment period(p>0.1). Lateral movement was decreased immediately after placement(p<:0.05) and then increased 1 week after placement but not recovered as before experiment. The opening and closing velocity of mandible was shown minor changes but not statistically significant. 5. During the habitual opening, anteroposterior movement of mandible was decreased 1 week after placement(p<0.(6) and then increased immediately after removal and recovered 1 week after removal as before experiment. Vertical movement was not shown significant changes. Lateral displacement of mandible was increased continuously and recovered 1 week after removal. Opening velocity was temporarily increased immediately after removal but recovered and closing velocity was not shown significant changes. 6. During the right side chewing, anteroposterior movement of mandible was increased immediately after removal but recovered and vertical movement was not shown statistically significant results. Lateral displacement and velocity o mandible were not shown significant results. 7. During the left side chewing, the changes of mandibular movement pattern were not shown statistically significant results.

달팽이관내 기저막의 유한요소 모델링

강희용,양성모,김봉철,임재중,용부중 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1

Cochlea is well known to have the ability to analyze a wide frequency and this ability seems to be caused to the Basilar Membrane(BM) configuration. However, the relationship between the Cochlea frequency-position map is not clear. In this paper, the three-dimensional BM model was made using the Finite Element Method. Then, an attempt was made to examine the influence of the BM configuration on the Cochlea frequency-position map.

鐵筋콘크리트 有孔보에 관한 硏究

金容孚 成均館大學校 科學技術硏究所 1986 論文集 Vol.37 No.1

In building structure, the story height can be minimized by providing openings in beams which serves for the utility equipments passing through. The dead space in false ceiling is thus put to economical use in the form of a substantial reduction in materials and construction cost. To obtain the basic experimental informations for design and to provide the practical guidances, this research explores the pure shearing characteristics, and the shearing plus bending characteristics of reinforced concrete beams with the circular openings in the web, theoretically and experimentally. Twenty two beams were tested which two of them did not have any openigs (solid beams). Twenty beams were divided into three groups; A, B and C in accordance with the three kinds of moment to shear ratios, M/V·d(0,0.077 and 1.54). Each of these three groups were divided again in two groups; the opening of the one group was reinforced with the ring and the opening of the other group was unreinforced. The diameters of the openings are 0.1, 0.2, 0.3, 0.4, and 0.5 times the depth of the beams and all the opening are positioned on the beam centroidal axis. Their dimentions were 270cm long, 20cm wide, and 30cm deep. The two concentrated loads on the beam were applied in increments up to failure. After experiment had been conducted, the results were tabulated and analyzed comparing with the theoretical predictions.

Rosencrantz and Guildenstern are Dead에 나타난 연극과 삶의 관계

이부용 동아대학교 인문과학대학 영어영문학과 1993 동아영어영문학 Vol.9 No.-

청소년 관련법 제·개정의 의미와 주요내용 분석

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.