• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.804-807
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• 1996

In this paper, a new model of TDF(two degree of freedom) spin-stabilized platform has been suggested. The platform driving signal modulated in the spinning frequency is described in demodulated form keeping its precession angular velocity. When a strong spinning torque exists, the cross-axis spring constant cannot be neglected in modelling of the platform precession dynamics. A linearized dynamic model of spin-stabilized platform pointing loop is derived and validated through the comparison between simulation and experimental results.

• 복식
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• 제21권
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• pp.207-218
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• 1993

The desire of our contempories who wish to recover humanities fading away and get back recover humanities fading away and get back to the nature is emerging as a main theme of the fashion today the decade of facing 21st century. The prevalence of naturalness-ecology ru-ral peasant look-and ethnic look shows the tendency mentioned above. Kenzo Takada' works which exhibit this naturalness and ethnic look were picked and investigated. The objective of this research is to study the beauty of form and internal and investi-gate in what form the naturaless and Ethnic look in Kenzo's work. The result were as followings : <1> Draped form are mainly used as form and they are made neglecting the body line by straight-cut and provide the wearer ease and freedom of movements <2> As for the color fantastic original colors (red, blue, etc) and natural colors are used. And Strong color contrast is seen. In ethnic look original colors(red, blue, etc.) natural colors and ethnic colors are used. <3> As for the fabric Cotton neat skilk and wool etc are used mainly and use of such natural fibers represents the return to the natural well. <4> As for ornament natural things-straw hat flower feather pebble, shell-are used and exhibit natural feelings strongly. For the ethnic look ornaments representing each country's ethnic atmos-phere by hat scarf and neckcloth made of natural fibers. <5> As for naturalness Flower deer butter-fly leopard and plant etc, are used as motif. As for ethnic look flower geometric motif are used.

• 복식
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• 제50권8호
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• pp.57-66
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• 2000

The purpose of this study describe about aesthetic of korean art and costume. Therefore we understand the beauty of korean style well. Methods of this study are the analyst of the paper before published on the aesthetic and costume aesthetic. Especially in the global postmodern age. the understanding of the value of korean beauty and costume are very Important. This study define of the special character. That is as follows. 1) Beauty of form a. Harmony of line different character b. Composition of plane make super space aesthetic c. Beauty of asymmetric, non formal, freedom of dressed man d. Beauty of symbolic color 2) Beauty of mend a. Aesthetic of the north nomads feeling b. View of the naturalism c. Ceremony of confucianism d. Preservation of original form, koreanization from heterogeneity

• Communications for Statistical Applications and Methods
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• 제19권5호
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• pp.673-683
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• 2012

Cabral et al. (2012) defined a mixture model of multivariate skew t-distributions(STMM), and proposed the use of an ECME algorithm (a variation of a standard EM algorithm) to fit the model. Their estimation by the ECME algorithm is closely related to the estimation of the degree of freedoms in the STMM. With the ECME, their purpose is to escape from the calculation of a conditional expectation that is not provided by a closed form; however, their estimates are quite unstable during the procedure of the ECME algorithm. In this paper, we provide a conditional expectation as a closed form so that it can be easily calculated; in addition, we propose to use the ECM algorithm in order to stably fit the STMM.

• 복식
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• 제50권2호
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• pp.59-80
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• 2000

In February 1947, Christian Dior startled the world with his spring collection. He transformed the unflattering square shouldered outline of women's wartime fashion overnight. It was not only fashion that made a pivotal point for opulence and elegance, The style of architecture, furniture, glass, and silverware also made a radical change. The new style emerged after war called " organic modernism'. This study is to define the visual characteristics of fashion, architecture, furniture and craft after World War II and examine the social factors and aesthetics that generated a new style. The common asthetic characteristics are freedom, abstraction of symbolic from, asymmetry, and exaggeration of form. The social factors, values and aesthetics are economic reconstruction and renaissance of design , technical development and new materials, fredom and optimistic view after the holocaust of war, and organic aesthetics and humanism.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2005년도 춘계학술발표대회 논문집
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• pp.247-248
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• 2005

Human beings are perhaps most outstanding in longing for the beauty in order. The natural form have a power to be self-respect and also a repetitious pattern. Such natural forms will be the source of design, its constituent principles. Such natural forms will be the source of design, its constituent principle is that the minimum energy system constitutes the maximum and various systems, its forms come int being during the harmony of forces, and various systems, its forms come into being during the harmony of forces, and it has a light structure to surmount any influence resulting from the increasement of its size. Therefore, in organizing space, such order of natural forms will provide space with vitality and can express the relation of freedom as order.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1990년도 하계학술대회 논문집
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• pp.32-35
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• 1990

If one express the basio equations of electromagne tics in terms of differential form, one can have many physical meanings. To obtain this advantages in Finite Element Method, we should use new element. In this study, we select degree of freedom as circulation A along edges of the mesh, and use Egde Element because A is i-form. We apply this method to some examples of the 3-D magnetostatics, and obtain decrease of total nonzeros and increase of accuracy.

• 대한기계학회논문집
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• 제18권6호
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• pp.1421-1429
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• 1994

An algorithm is developed for solving the inverse kinematic problem of a 6-degree-of-freedom robot with a wrist offset for which the closed form inverse solutions are not obtainable, but knowledge of one joint variable allows closed form solutions of the remaining joint variables. The algorithm does not require Forward Kinematics nor Jacobian but uses the implicit kinematic relationships between joint variables and the given hand position. An iterative back substitution method is used to solve the inversion and the optimal conditions of the convergence are incoporated. An example is given to illustrate the concepts, the solution procedure and its convergency.

• 제어로봇시스템학회논문지
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• 제9권12호
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• pp.1026-1032
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• 2003

A biped walking robot which is developed as a platform for researching walking algorithm is briefly introduced. The developed walking robot has 6 degrees of freedom per one leg. The origins of the last three axis do not intersect at a point, so the kinematic analysis is cubmersome with the conventional method. In the former version of the robot, Jacobian-based inverse kinematics method is used. However, the Jacobian-based inverse kinematics method has drawbacks for the application in which knee is fully extended such as stair-case walking. The reason far that is the Jacobian becomes ill-conditioned near the singular points and the method is not able to give adequate solutions. So, a method for giving a closed-form inverse kinematics solution is proposed. The proposed method is based on careful consideration of the kinematic structure of the biped walking robot.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제19권3호
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• pp.271-287
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• 2015

In this article, a more generalized form of the impact time and angle control guidance law is proposed based on the linear quadratic optimal control methodology. For the purpose on controlling an additional constraint such as the impact time, we introduce an additional state variable that is defined to be the jerk (acceleration rate). Additionally, in order to provide an additional degree of freedom in choosing the guidance gains, the performance index that minimizes the control energy weighted by an arbitrary order of time-to-go is considered in this work. First, the generalized form of the impact angle control guidance law with an additional term which is used for the impact time control is derived. And then, we also determine the additional term in order to achieve the desired impact time. Through numbers of numerical simulations, we investigate the superiority of the proposed guidance law compared to previous guidance laws. In addition, a salvo attack scenario with multiple missile systems is also demonstrated.