• 여성건강간호학회지
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• 제13권3호
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• pp.184-191
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• 2007

Purpose: This study was to determine the effects of foot reflexomassage on constipated college women for the treatment of constipation. Method: The researcher sampled nursing students attending a college of nursing science in Gyeonggi-Do, and checked if they were affected by constipation in reference to the Rome II criteria & CAS. They were randomly divided into an experimental group(15 subjects) and a control group(15 subjects). Foot reflexomassage was applied to the experimental group 10 times in 2 weeks: each time lasted 40 minutes. The frequency of defecation and severity of constipation by CAS were measured. The collected data was analyzed using the SPSS 11.5 program. Result: The CAS score of the experimental group was significantly lower after foot reflexomassage than those of the control group(p=.000). Conclusion: Foot reflexomassage can be considered an effective alternative treatment for constipated young women.

• 대한전자공학회논문지
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• 제27권2호
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• pp.1-8
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• 1990

부호율 r=b/n인 2진길쌈부호의 부등 비트오류 제어특성을 해석한다. Viterbi 복호되어 나온 b비트로 구성된 정보벡터에서 각 비트가 갖는 오류확률은 서로 다를 수 있다. 따라서 각 비트의 오류제어 성능은 그외 다른 비트의 오류제어 성능과 다를 수 있다. 이러한 부등 비트 오류특성은 DPCM 시스템의 표본 데이타를 전송할 때 전송상에서 신호대 잡음비의 개선을 위해 적용될 수 있다.

• 한국보건간호학회지
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• 제1권1호
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• pp.5-16
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• 1987

This study was carried out to assess the self-care ability of the adged diabetic patients. To achieve such a purpose, thirty cases of the adged patients were sampled the regular and' the irregular hospital visiting group respectively from 20th, Oct. to 29th, Oct. in 1985. The data were collected by means of personal & telephone interview, chart review, and home visiting, and analysed by use of percentage, t-test, $X^2-test$ and Pearson-correlation coefficient. The obtained results were as follows: the regular group scored more than the irregular one (1) on the knowledge of the D. M .. , (2) in expecting internal control on the Health Locus of Control, (3) on the self-care behaviors. The results show us that the self-care of the aged diabetic patient could and must be developed by the adequate nursing intervention.

• 한국정보통신학회논문지
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• 제6권1호
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• pp.1-5
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• 2002

디지털 제어시스템을 설계하려면, 먼저 아날로그 시스템을 설계한 후, 이산화하여 디지털 시스템을 설계한다. 본 논문에서는 최적 디지털 제어기의 선계에 샘플치 제어이론을 적용한다. 특히, 아날로그 제어기들의 멀티레이트 이산화에 Η$_2$최적화를 이용한다. 멀티레이트 구조상 인과성 제약을 갖는 멀티레이트 Η$_2$최적화를 통해 해를 얻는다. 설계 예제를 통해, 기존 이산화 방법과 비교하여, 멀티레이트 설계방법의 우수성을 확인한다.

• 전기전자학회논문지
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• 제23권3호
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• pp.817-825
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• 2019

마이크로프로세서를 이용한 제어알고리즘 구현에서 차분방정식이 매우 유용하게 사용된다. 샘플링 데이터로부터 미분 값을 추정하기 위해 전향, 후향 및 중심 차분 방식이 사용되어왔다. 차분 값을 계산하기 위해서는 차분계수가 매우 중요하다. 본 논문에서는 유한 차분 계수를 계산하기 위한 새로운 방식을 제시하고자 한다. 제안된 방식의 유효성을 입증하기 위해 RLS 알고리즘을 적용한 파라미터 추정에 대하여 적용하였다.

• 간호행정학회지
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• 제1권1호
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• pp.35-45
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• 1995

This study was designed and carried out to identify the methodologies of the staff evaluation used by the headnurses and their perception on the purpose of the evaluations, and to measure the degree and type of perceived purpose and the degree of implementation of staff evaluation principles into preactice. A hundred and eleven from four general hospitals with 600 beds and over were conveniently sampled. Data were gathered from August 20, through September 10, 1994 ; demographic data of respondents and 'methodologies used for staff evaluation' by questionaires, level of 'perceived purposes of staff evaluation' and level of implementation of the 'principles of staff evaluation into practice' by Likert-type rating scales developed by the researcher. Raw and percentile scores and means were calculated and data were processed further by t-tests and ANOVA. Results are as follows ; 1. Traditional methodlogies : checklists(90.1%) and ranking methods(45.9%) revealed to be the two mostly prefered and used methods. 2. Of the 20 item-descriptions of the 'purpose of staff evaluation': 10 'control, evaluative' and 10 'non-control, developmental' the first(mean=3.19) to the ninth(mean=2.74) in rank order revealed to be the 'control, evaluative purpose', while the tenth in rank order revealed to be the first among the 'non-control, evaluative' item(mean-1.57). 3. Level of purpose of staff evaluation perceived as 'control ; evaluative'(mean=43.76, S.D.=5.01) revealed to be significantly(t=-3.86, p<.05) highter than 'non-control ; developmental'(mean=40.65, S.D.=3.41). 4. Level of implementation of 'staff evaluation principle into practice' revealed to be moderately high(mean=2.40).

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 1999년도 추계공동학술대회 논문집:21세기지식경영과 정보기술
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• pp.477-483
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• 1999

이 연구는 인쇄기제어와 같은 기어를 포함한 직류전동기로 가동되는 회전계통 플랜트의 제어에 관해서 적분제어기와 전차수 상태관측기 및 영차홀드로 구성되는 데드비트제어시스템을 제안하고 있다. 샘플링된 연속데이터시스템의 응답은 샘플링사이에 리플이 발생치 않도록 보장할 수 없지만, 제안된 데드비트제어시스템의 응답은 MATLAB시뮬레이션을 통한 사례연구의 결과, 상태귀환형 최적제어나 출력귀환형 제어시스템응답 등에 비하여 정정시간이 횔씬 빠르고, 주어진 샘플링주기 후에 리플없는 출력응답을 얻을 수 있음을 보여준다.

• 제어로봇시스템학회논문지
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• 제13권5호
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• pp.487-492
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• 2007

This paper presents the development of digital robust fuzzy controller for uncertain nonlinear systems. The proposed approach is based on the intelligent digital redesign(IDR) method with considering the relaxed stability condition of fuzzy control system. The term IDR in the concerned system is to convert an existing analog robust control into an equivalent digital counterpart in the sense of the state-matching. We shows that the IDR problem can be reduced to find the digital fuzzy gains minimizing the norm distance between the closed-loop states of the analog and digital robust control systems. Its constructive conditions are expressed as the linear matrix inequalities(LMIs) and thereby easily tractable by the convex optimization techniques. Based on the nonquadratic Lyapunov function, the robust stabilization conditions are given for the sampled-data fuzzy system, and hence less conservative. A numerical example, chaotic Lorentz system, is demonstrated to visualize the feasibility of the proposed methodology.

• 제어로봇시스템학회논문지
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• 제12권6호
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• pp.547-553
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• 2006

This paper studies digital control of biodynamic model of HIV-1 via intelligent digital redesign (IDR). The purpose of the IDR is to develop an equivalent digital fuzzy controller maintaining the satisfactory performance of an existing continuous-time fuzzy controller in the sense of the state-matching. Some conditions for the stability as well as the global state-matching are provided.. They are given by the form of the linear matrix inequalities (LMIs) and thereby easily tractable by the convex optimization techniques. The main features of the proposed method are that 1) the generalized control scheme is provided for the multirate as well as the single-rate digital controllers; 2) a new compensated block-pulse function method is applied to closely match the states of the continuous-time and the sampled-data fuzzy systems in the discrete-time domain; 3) the two-step procedure of IDR is presented to prevent the performance degradation caused by the additional stability conditions. The applicability of the proposed approach is shown through the biodynamic model of HIV-1.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2632-2635
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• 2003

This paper designs a software signal generator for the new GPS L2 civil signal. The CM/CL code and the message structure of L2CS described in GPS ICD PPIRN-200C-007 are used in designing the signal generator. The output of the GPS signal generator is designed as the sampled IF data with the sampling frequency 5.7MHz and stored in the binary data format. By analyzing both the spectrum characteristics of the output signal and the correlation properties of the CM/CL code, the validation of the designed GPS signal generator is shown. It should be mentioned that the modeling of the GPS satellite constellation and the error sources remains for implementing the software space segment of GPS.