• Title/Summary/Keyword: first-order necessary condition

Search Result 143, Processing Time 0.028 seconds

The Effect of Universal Fashion and An Offer of Design - With a Focus on Fashion Shows for the Disabled - (유니버설 패션의 효과와 디자인제안 -장애인 패션쇼를 중심으로 -)

  • Rhee, Nan-Hee;An, Jong-Suk
    • Journal of the Korean Society of Costume
    • /
    • v.58 no.7
    • /
    • pp.1-12
    • /
    • 2008
  • In this study, the fashion show of the disabled was hold for the universal fashion through the clothes which has relationship with personal mentality and behavior. There are several outcome of the fashion show. First of all, the main outcome is that through the fashion show the disabled fret that there is no difference between them and the ordinary people. Also, it is necessary to the revitalize the product development with universal fashion design. Secondly, the systematic succeeding study is necessary to solve the problem of the disabled and to set up the database management system in order to have a general idea for the their actual living condition and essentials of life for the disabled. Thirdly, even though the main purpose of the fashion show was to give them an opportunity to live fairly as a human being within their society, after the show, the necessity of social system to solve the additional problems and to continue the mental satisfaction comes. Fourthly, the disable have a tendency not to wear the special clothes for them since they want to be seen as the ordinary person. Finally, I suggest that there must be revitalization of a special design and the product development to reflect above mentioned points in addition to ordinary clothes.

Backstepping and Partial Asymptotic Stabilization: Applications to Partial Attitude Control

  • Jammazi, Chaker
    • International Journal of Control, Automation, and Systems
    • /
    • v.6 no.6
    • /
    • pp.859-872
    • /
    • 2008
  • In this paper, the problem of partial asymptotic stabilization of nonlinear control cascaded systems with integrators is considered. Unfortunately, many controllable control systems present an anomaly, which is the non complete stabilization via continuous pure-state feedback. This is due to Brockett necessary condition. In order to cope with this difficulty we propose in this work the partial asymptotic stabilization. For a given motion of a dynamical system, say x(t,$x_0,t_0$)=(y(t,$y_0,t_0$),z(t,$z_0,t_0$)), the partial stabilization is the qualitative behavior of the y-component of the motion(i.e., the asymptotic stabilization of the motion with respect to y) and the z-component converges, relative to the initial vector x($t_0$)=$x_0$=($y_0,z_0$). In this work we present new results for the adding integrators for partial asymptotic stabilization. Two applications are given to illustrate our theoretical result. The first problem treated is the partial attitude control of the rigid spacecraft with two controls. The second problem treated is the partial orientation of the underactuated ship.

A non-standard class of sobolev orthogonal polynomials

  • Han, S.S.;Jung, I.H.;Kwon, K.H.;Lee, J.K..
    • Communications of the Korean Mathematical Society
    • /
    • v.12 no.4
    • /
    • pp.935-950
    • /
    • 1997
  • When $\tau$ is a quasi-definite moment functional on P, the vector space of all real polynomials, we consider a symmetric bilinear form $\phi(\cdot,\cdot)$ on $P \times P$ defined by $$ \phi(p,q) = \lambad p(a)q(a) + \mu p(b)q(b) + <\tau,p'q'>, $$ where $\lambda,\mu,a$, and b are real numbers. We first find a necessary and sufficient condition for $\phi(\cdot,\cdot)$ and show that such orthogonal polynomials satisfy a fifth order differential equation with polynomial coefficients.

  • PDF

Optimal growth conditions and economic analysis of sea cucumber releasing

  • Lee, Cheol;Choi, Sang Duk
    • Fisheries and Aquatic Sciences
    • /
    • v.23 no.4
    • /
    • pp.11.1-11.11
    • /
    • 2020
  • We tried to find the optimal growth conditions of sea cucumber and to analyze the economic effectiveness of the sea cucumber seedling release project in Korea. We first examined the optimal growth conditions of sea cucumber in the relating literatures. Then, we analyzed the economic effectiveness of the sea cucumber seedling release project of the Woncheon fishing village union of Gyeongnam Province in 2016-2018 by using the cost benefit analysis method. The net income of the release project of the Woncheon fishing village union was 69,850 Korean won. The benefit to cost ratio of the sea cucumber seedling release project of the Woncheon fishing village union was estimated to be 1.7, indicating that the project was economically feasible. In order to improve the economic feasibility of the sea cucumber release project, as we see in the case of the Woncheon fishing village union, it is necessary to manage the purchase of the sea cucumber seedling, to improve the recapture rate of sea cucumber, and to manage marketing of sea cucumber.

A Study on Open of Information Data and Privacy Rights

  • Kim, Taek
    • Journal of the Korea Society of Computer and Information
    • /
    • v.21 no.11
    • /
    • pp.73-78
    • /
    • 2016
  • All citizens will not be infringed communications rub. That can be seen to have the privacy freedom.lot (Internet of things) have released a security system in the era of information privacy appear that public safety and threat. Currently, Information and communication devices can be use criminal investigation, including search and seizure confirmed the fact communication of the communication restriction information storage medium for the common purpose of providing material system, the system provides data and communications. This paper focused on Privacy and open of information data by the Prosecutor and Police in korea. Privacy rights include that transparency information, communication, and protections for the rights of the individuals. It is necessary to be lawfulness of processing, individuals consent while Prosecutors investigations. especially we need explicit condition and National agency need to obtain in order to legitimize their processing of personal information data. The author emphasize are as follows: first, to examine Privacy rights information' necessity and problem, second, to understand Privacy rights and limits, third, to suggest improvements for the purpose of Transparency, codes of conduct and Democracy of information.

The Short Time Spectra Analysis System Using The Complex LMS Algorithm and It's Applications

  • Umemoto, Toshitaka;Fujisawa, Shoichiro;Yoshida, Takeo
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1998.10a
    • /
    • pp.58-63
    • /
    • 1998
  • B.Widrow established fundamental relations between the least-mean-square (LMS) algorithm and the digital Fourier transform[1]. By extending these relations, we proposed the short time spectra analysis system using the LMS algorithm[2]. In that paper, we used the normal LMS algorithm on the thought of dealing with only real analytical signal. This algorithm minimizes the real mean-square by recursively altering the complex weight vector at each sampling instant. But, the short time spectra analysis sometimes deals with the complex signal that is outputted from complex analog filter. So, in order to optimize and develop this methods, furthermore it is necessary to derive an algorithm for the complex analytical signal. In this paper, we first discuss the new adaptive system for the spectra analysis using the complex LMS algorithm and then derive convergence condition, time constant of coefficient adjustment and frequency resolution by extending the discussion. Finally, the effectiveness of the proposed method is experimentally demonstrated by applying it to the measurement of transfer performance on complex analog filter.

  • PDF

A study on improvement of the system cultivating professionals in environment (환경 전문 인력 양성의 개선 방안)

  • 이무춘;전의찬;김기철
    • Hwankyungkyoyuk
    • /
    • v.13 no.1
    • /
    • pp.23-36
    • /
    • 2000
  • As the environmental industry grew bigger and bigger, the corcern about environmental condition increased and the demand of environmental expert tended to be much more increased. A lot of universities therefore established environment-related departments on campuses and ended up with producing numerous students every single year. However, some problems such as followings were in this study. First, the industry cannot adopt all the students directly from universities due to their low capabilities in environment affairs. Second, the universities yield much more students than the industry can actually adopt. In order to yield the appropriate students meeting the expectation of the industry, it is necessary to permit no more new department established on campus and to adopt new environmental field such as environmental management, eco-auditing and also 3+1 lecture system focused on real affairs.

  • PDF

IMPROVEMENT OF WASTE ADMINISTRATION BY NEW PUBLIC MANAGEMENT

  • Kotomi Uemoto ;Seigo Nasu ;Shunji Kusayanagi
    • International conference on construction engineering and project management
    • /
    • 2005.10a
    • /
    • pp.424-428
    • /
    • 2005
  • As the application of NPM in waste administration branch this paper proposes a new waste management method in order to increase the efficiency of resources and reduce the quantity of waste. First the matrix method is suggested which comprehensively consider and integrate the proposals of different government departments. Moreover the inhabitant's attitude toward the new waste management measures was investigated. Based on the investigation the evaluation function was made, which include three elements: necessary budget, the effect of cost decrease and the environmental burden decrease. The optimal method of budget allocation to maximize social welfare is proposed under the condition of limited budget by the evaluation function. By applying this system further local governments will be able to determine their adequate service level and budget size.

  • PDF

Changes of Texture and Plastic Strain Ratio of Asymmetrically Rolled and Annealed Cu Sheet (I) (비대칭 압연과 열처리한 Cu 판의 집합조직과 소성변형비 변화 (I))

  • Lee, C.W.;Lee, D.N.;Kim, I.
    • Transactions of Materials Processing
    • /
    • v.28 no.6
    • /
    • pp.354-360
    • /
    • 2019
  • The plastic strain ratio is one of the factors that affect the deep drawability of metal sheets. The plastic strain ratio of fully annealed Cu sheet is low because its texture has {001}<100>. In order to improve the deep drawability of Cu sheet, it is necessary to increase the plastic strain ratio of Cu sheet. This study investigate the increase of plastic strain ratio of a Cu sheet after the first asymmetry rolling and annealing, and the second asymmetry rolling and annealing in air and Ar gas conditions. The average plastic strain ratio (Rm) was 0.951 and |ΔR| value was 1.27 in the initial Cu sheet. After the second 30.1% asymmetric rolling and annealing of Cu sheet at 1000℃ in air condition, the average plastic strain ratio (Rm) was 1.03 times higher. However, |ΔR| was 0.12 times lower than that of the initial specimen. After the second 18.8% asymmetric rolling and annealing of Cu sheet at 630℃ in Ar gas condition, the average plastic strain ratio (Rm) was 1.68 times higher and |ΔR| was 0.82 times lower than that of the initial specimen. These results are attributed to the change of the texture of Cu sheet due to the different annealing conditions.

A comparative study of three collocation point methods for odd order stochastic response surface method

  • Li, Dian-Qing;Jiang, Shui-Hua;Cheng, Yong-Gang;Zhou, Chuang-Bing
    • Structural Engineering and Mechanics
    • /
    • v.45 no.5
    • /
    • pp.595-611
    • /
    • 2013
  • This paper aims to compare three collocation point methods associated with the odd order stochastic response surface method (SRSM) in a systematical and quantitative way. The SRSM with the Hermite polynomial chaos is briefly introduced first. Then, three collocation point methods, namely the point method, the root method and the without origin method underlying the odd order SRSMs are highlighted. Three examples are presented to demonstrate the accuracy and efficiency of the three methods. The results indicate that the condition that the Hermite polynomial information matrix evaluated at the collocation points has a full rank should be satisfied to yield reliability results with a sufficient accuracy. The point method and the without origin method are much more efficient than the root method, especially for the reliability problems involving a large number of random variables or requiring complex finite element analysis. The without origin method can also produce sufficiently accurate reliability results in comparison with the point and root methods. Therefore, the origin often used as a collocation point is not absolutely necessary. The odd order SRSMs with the point method and the without origin method are recommended for the reliability analysis due to their computational accuracy and efficiency. The order of SRSM has a significant influence on the results associated with the three collocation point methods. For normal random variables, the SRSM with an order equaling or exceeding the order of a performance function can produce reliability results with a sufficient accuracy. The order of SRSM should significantly exceed the order of the performance function involving strongly non-normal random variables.