• Title/Summary/Keyword: Control criteria

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Atopic dermatitis (아토피피부염)

  • Pyun, Bok Yang
    • Clinical and Experimental Pediatrics
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    • v.49 no.6
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    • pp.589-592
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    • 2006
  • Atopic dermatitis is estimated to affect 15-20% of the childhood population and there id considerable evidence that the prevalence is increasing. But it is frequently under diagnosed and inappropriately treated yet. Atopic dermatitis can have a large social;. emotional and financial effect on the child and their family. Atopic dermatitis also commonly predated the development of asthma and allergic rhinitis. Therefore early diagnosis and proper treatment are the key for control the atopic dermatitis itself and modify the future repiratory allergies. This review will cover the new diagnostic criteria and treatment briefly.

Stability of an overlapping decentralized controller (중복 분산 제어기의 안정성)

  • 박찬국;이장규
    • 제어로봇시스템학회:학술대회논문집
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    • 1993.10a
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    • pp.943-946
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    • 1993
  • This paper presents design criteria of an overlapping decentralized controller by investigating the controllability and closed loop stability of the expanded system. To determine the criteria we classify the overlapping decentralized controller into an overlapping expanded controller and a contractible controller. It is shown that conditions of system expansion to design these controllers are differently used. The overlapping expanded controller needs the aggregation conditions due to the importance of a structure of the expanded system. The contractible controller which intends to use in the original space needs the restriction because of stability of the original system.

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Comparison and The Evaluation of Criteria for Arousal Level Control (SIC에 의한 각성도 제어를 위한 평가기준의 설정 및 비교)

  • Ko, H.W.;Kim, Y.H.
    • Proceedings of the KOSOMBE Conference
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    • v.1996 no.11
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    • pp.372-376
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    • 1996
  • This paper describes the criterias to evaluate arousal states of subject and these are applied to contort arousal level. Correction factor was introdued to compensate under or over evaluated Nz due to the different initial basal skin impedance. These criteria and correction factor were worked well to increase the arousal level.

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Deming prize and malcolm baldrige national quality award

  • Ryu, Seewon;Jo, Hongkyu;Heo, Jaeho
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1995.04a
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    • pp.827-844
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    • 1995
  • Total Quality Management (TQM) is the aggregated management philosophy for quality including production, operation, human resource, leadership, marketing, and etc. TQM is the advanced concept and philosophy rather than traditional "Quality Control" or "Quality Assurance". Nowadays, downstream costs has been increased, that made cost accountants' attention to costs of quality. Many countries have developed their own quality awards system in order to improve overall national quality level. The Deming Prize of Japan and Malcolm Baldrige National Quality Award (MBNQA) of United States are two representatives of quality prizes. We compared the two awards by means of their history, objective, coverage, and judging criteria. Deming Prize has a longer history than MBNQA. Deming Prize selects five winners a year, while MBNQA has two or three areas. The biggest difference is judgement criteria. The Deming Prizes focuses on statistical control which is a traditional quality control method, while MBNQA concentrates on modem business concept such as customer satisfaction. The suggestions to these awards are: evaluate more on information of quality; evaluate more on inter-functional relationship between quality control function and other link more financial success.e financial success.

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A Study on Obese Female College Students' Weight Control Experiences (비만 여대생의 체중조절 경험 연구)

  • Hwang, Yun-Young
    • Women's Health Nursing
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    • v.10 no.4
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    • pp.291-300
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    • 2004
  • Purpose: This study attempted to show the implications of obese female college students' weight control experiences and to use this as primary data for developing a nursing intervention. Method: The participants were 7 obese students who had tried losing weight at C College on Jeju Island. Their average age was 22 and BMI was $25.6kg/m^2$ on average. The data were collected from May 17th to July 6th 2004, and in-depth interviews were conducted with open-ended questions. Result: The analysis was conducted by Colaizzi's phenomenological method, and the analyzed results were categorized into 9 criteria, 22 theme clusters and 50 themes. The 9 criteria include withdrawal, desperation, self-restraint, relief, satisfaction, distraction, depression, regaining self-control and negligence of health. They tended to go through a weight gain loss cycle in a repetitive manner, and were faced with great physical and mental difficulties. In addition, they often went on a severely-strict diet without taking their health condition into consideration, which, in effect, causes various health problems. Conclusion: This study gives insights into the weight control experiences of obese female college students, and it shows developing more practical and effective nursing interventions are urgently needed.

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Stability Analysis and Stabilization for Neutral Networked Control System (뉴트럴 네트워크 제어 시스템의 안정도 분석 및 퍼지 제어기 설계)

  • Song, Min-Kook;Kim, Jin-Kyu;Joo, Young-Hoon;Park, Jin-Bae
    • Journal of the Korean Institute of Intelligent Systems
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    • v.20 no.2
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    • pp.159-164
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    • 2010
  • This paper focuses on the stability analysis and stabilization for networked control system with neutral type of time-delay. By utilizing the delay partitioning idea, new stability criteria are proposed in terms of linear matrix inequalities(LMIs). These conditions are developed based on the Lyapunov-Krasovskii functionals. Based on the derived criteria, a sufficient condition for te solvability of this problem is obtained in terms of linear matrix inequality without decomposing the original system matrices. Also, it is shown that the proposed controller design method is general for networked control systems. Finally, illustrative examples are presented to show the applicability of the proposed method.

A Brief Review of the Legal Definition of Chemical Accident under the Current Chemical Substances Control Act (화학물질관리법상 화학사고 정의에 관한 소고)

  • Jihoon Park;Seon-Oh Park;Hyojin Park;Hye-Ok Kwon
    • Journal of Environmental Health Sciences
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    • v.49 no.4
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    • pp.179-182
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    • 2023
  • The Chemical Substances Control Act has been legislated to counter the risks posed by chemical substances to public health and the environment, but a number of small- and large-scaled incidents related to hazardous chemicals continue to occur every year. The Korean Ministry of Environment takes legal responsibility for prevention, preparedness, and response to nationwide chemical accidents under the Chemical Substances Control Act. The determination of chemical accidents that occur during hazardous chemical handling processes is based on the Article 2 (Definitions) of the law and the administrative criteria for judgement of chemical accidents. However, there are certain ambiguities in the scientific basis for determining chemical accidents under the current regulations. Whether or not a chemical accident has a direct influence on penalties and administrative measures for a workplace where an accident occurred, it is necessary to find reasonable criteria for determining chemical accident based on legal and scientific evidence.

LMI-based Design of Integral Sliding Mode Controllers (적분 슬라이딩 모드 제어기의 LMI 기반 설계)

  • Choi, Han-Ho
    • Journal of Institute of Control, Robotics and Systems
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    • v.15 no.6
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    • pp.563-566
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    • 2009
  • This paper presents an LMI-based method to design a integral sliding mode controller for a class of uncertain systems. Using LMIs we derive an existence condition of a sliding surface. And we give a switching feedback control law. Our method is a generalization of the previous integral sliding mode control design methods. Since our method is based on LMIs, it gives design flexibility for combining various useful design criteria that can be captured in the LMI-based formulation.

On the Design of Digital Sub-Controller for Accuracy Improvement of Analog Speed Control System (애널로그 속도제어계의 제어정도를 향상하기 위한 디지털제어기의 설계)

  • Han, Se-Hee
    • Proceedings of the KIEE Conference
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    • 1988.11a
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    • pp.36-41
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    • 1988
  • Analog and Digital Speed Control Systems have mutually complementary properties. Analog System has good dynamic characteristics and moderate steady-state accuracy and can be implemented economically with operational a ampliers. Digital System, on the contray, has good static accuracy, but relatively poor dynamic property. So, a hybrid system which uses both digital and analog control can have good static and dynamic characteristics. In this paper, it is shown that a simple digital controller can improve steady-state accuracy of existing analog control system satisfactorily, and some design criteria are presented also.

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NUMERICAL SOLUTION OF A KYNAMIC SHAPE CONTROL PROBLEM

  • Choi, Wan-Sik;Belbas, Stavros A.
    • 제어로봇시스템학회:학술대회논문집
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    • 1995.10a
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    • pp.275-278
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    • 1995
  • In this paper, we consider a dynamic shape control problem with an example of controlling a flexible beam shape. Mathematical formulations are obtained by employing the Green's function approach. Necessary conditions for optimality are derived by considering the quadratic performance criteria. Numerical results for both of the dynamic and the static cases are obtained and compared.

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