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장완식,신광수,백은석 조선대학교 생산기술연구소 1996 生産技術硏究 Vol.18 No.1
This paper presents three-dimensional robot task using the vision control method. A minimum of two cameras is required to place points on end effecters of n degree-of-freedom manipulators relative to other bodies. This is accomplished using a sequential estimation scheme that permits placement of these points in each of the two-dimensional image planes of monitoring cameras. Estimation model is developed based on a model that generalizes known manipulator kinematics to accommodate unknown relative camera position and orientation, etc. This model uses six uncertainty-of-view parameter estimated by the iteration method. The method is tested experimentally with three-axis manipulator in two ways; a) the estimation model test, b) a three-dimensional point placement task. These results show that control scheme used is precise and robust.
내장형 모터와 리니어 모터를 적용한 초고속 수평형 머시닝센터의 열 특성 해석
김석일,조재완 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.5
This paper presents the thermal characteristic analysis of a high-speed horizontal machining center with spindle speed of 50,000rpm and feedrate of 120m/min. The spindle system is designed based on the built-in motor, angular contact ceramic ball bearings, oil-air lubrication and oil jacket cooling method. The X-axis and Y-axis feeding systems are composed of the linear motors and linear motion guides, and the Z-axis feeding system is composed of the servo-motor, ball screw and linear motion guides. The thermal characteristics such as the temperature distribution, temperature rise, thermal deformation and step response, are estimated based on the finite element model of machining center and the heat generation rates of heat sources related to the machine operation conditions. Especially, the thermal time constant assessed from the step response function is introduced as an index of thermal response characteristics.
英國어음法(Bills of Exchange Act)上 融通어음에 관한 法律關係
梁碩完 제주대학교 1987 논문집 Vol.24 No.1
In the bill institution, the accrommodation bill that is a straightforward expression of credit has long been institutionalized in the Anglo-American legal system. while the Continental legal system, including the Law of Bills of our country has no codified regulatlons concerning it. The use of the accommodation bill, however. has long tern widely prevalent in the countries of the Continental legal system that has no substantive enactment as well as in the Anglo-American legal system. In our country, the accommodation bill has played an important role in our country's economy, yet the settlement of thr legal relations in regard to the accommodation bill is committed only to theories and judicial precedents, because there is no regulation concerning it. In the law of England and America, the regulations regarding the control of accommodation bills are Bills of Exchange Act(BEA) of England and Uniform Negotiable Instruments Law(UN I.L) of America and the provision concerning commercial paper, the third article of Uniform Commercial Code(U.CC.). With the establishment of convention portant lot uniforme sur les lettres do change et billets a' ordre in 1934. access of the Continental legal system was had to the Anglo-American legal system and our country's Law of Bills has been close to that of England and America, but there is still a wide difference between them. In England the law of bills of exchange has long been developed as a customary law and in 1882 Bills of Exchange Act was enacted by means of collecting and arranging the former customary laws, special laws and the judicial precedents This B.E.A has stipulated regulations concerning the legal concept of the accommodation bill in partirular. and became the basis of the legislation of UNIL in America. The aim of this paper is to examine the system of interpretation for facilitating the solution of the legal relations of our country's accommodation bills by studying the legal structure of function of the accommodation bill with the theories and precedents as its materials, and with the Engllsh Bills of Exchange Act as its central subject matter
새로운 방법에 의한 1,1-R,R'-2,3,4,5-테트라페닐-1-실라사이크로펜타디엔의 합성
주완철,흥장환,최석봉 성균관대학교 기초과학연구소 1988 論文集 Vol.39 No.1
A new synthesis of 1,1-R, R',-2, 3, 4, 5-tetraphenyl-1-silacyclopentadiene was described. It was synthesized from one-pot reaction of 1,4-dilithio-1, 2, 3, 4-tetraphenylbutadiene with R_nSiCl_4-n (n=0, 1, 2), where 1, 4-dilithio-1, 2, 3, 4-tetraphenyl butadiene was prepared from the reaction of diphenyl acetylene and lithium metal in ether solution with good yield (80∼85%).
채완석,황세민 진주여자전문대학 2002 論文集 Vol.25 No.-
To get interested in sensuous amenity of an urban environment can be an antipathy against the featureless urban image created through a uniform process of change, as well as a by-product of unplanned urbanization. Recently, as people have shown more interest in the urban image as a living space itself, various attempts are being made such as three-dimensional development of land, the development of neglected spaces like a water front, and redevelopment of the urban center. Thus, developments to form a urban image consist of several sub-categories falling in a human visual- perceptual category, and they are represented in various kinds of forms in a mutual supplementary relation. The main purposes of this thesis are, among the factors that determine the urban image, to frame a concept related to the visual one which derives from the stimulus-response relation of human beings, and investigate how to design an artificial ground among a number of types of by-products deriving from an urbanization process; in other words, at the starting point of three-dimensional development of a urban space, to deal with the value of an artificial ground and the direction of design in order to form a lively and stable urban image in the process of urbanization which is in progress in a contradiction of conservation and creation, nature and art, competitive and united scenery.