• 대한전기학회논문지:전력기술부문A
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• 제48권3호
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• pp.190-196
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• 1999

Continuation power flow has been developed to remove the ill-condition problem caused by singularity of power flow Jacobian at and near at steady-state voltage instability point in conventional power flow. Continuation power flow consists of predictor and corrector. In prddictor, the direction vector at the resent solution is caluculated and the initial guess of next solution is determined at the distance of step length. The selection of step length is a very important part, since computational speed and convergence performance are both greatly affected by the choice of the step length. This paper presents the practical step length selection algorithm using the reactive power generation sensitivith. In numulation, the proposed algorithm is compared with step length selection algorithm using TVI(tangent vector index).

• 호남수학학술지
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• 제36권4호
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• pp.895-899
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• 2014

In this paper, we consider generalized two variable Eisenstein series. We give analytic continuation and prove modular transformation formulae for them.

• 한국융합학회논문지
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• 제9권8호
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• pp.235-246
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• 2018

본 연구는 배드민턴 동호인의 참여행동과 운동행동, 종목이미지 및 운동지속의 구조적 관계를 검증하는 목적으로 수행되었다. 그 결과, 첫째, 종목이미지에 영향을 미친 변인은 참여행동의 하위요인 중 재미였으며, 운동행동의 하위요인 중 자존감과 스트레스해소였다. 둘째, 종목이미지는 운동지속에 영향을 미치고 있었다. 마지막으로, 참여와 운동행동은 종목 이미지를 매개로 하여 운동지속에 간접적 영향을 보이고 있었다. 본 연구의 결과는 종목이미지가 참여행동, 운동행동 및 운동지속의 관계에서 매개변인으로 중요한 역할을 하고 있음을 검증하였으며, 종목이미지의 역할에 대한 기초자료를 제공한데 그 의의가 있다.

• 한국컴퓨터정보학회논문지
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• 제27권1호
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• pp.107-113
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• 2022

본 논문에서는 홈트레이닝의 기대감과 운동몰입, 운동지속의도와의 관계에 대해 제안한다. 연구의 대상은 2021년 3월 현재 부산, 경남 지방경찰청 소속 경찰공무원을 대상으로 한다. 그 중 홈트레이닝에 참여해 본 경험이 있는 337명을 대상으로 하여 설문조사를 실시하였다. 연구결과, 첫째 홈트레이닝의 기대감은 운동몰입, 운동지속의도 요인과 유의한 상관이 있는 것으로 나타났다. 둘째, 홈트레이닝 참여자의 기대감은 운동몰입, 운동지속의도에 유의한 영향을 미치는 것으로 나타났다. 셋째, 홈트레이닝 참여자의 운동몰입은 운동지속의도에 유의한 영향을 미치는 것으로 조사되었다. 각종 치안현장에 대비한 체력조건을 준비하기 위해 홈트레이닝은 유용하게 활용될 것이다. 단기간의 트레이닝이 아닌 장기간의 계획을 세워 트레이닝을 실시한다면 홈트레이닝이 추구하는 효과를 충분히 달성할 수 있을 것이다.

• 대한수학회보
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• 제38권4호
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• pp.669-677
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• 2001

Three new fixed point theorems are presented for the set valued maps of Idzik. Moreover a continuation theorem for such maps is also given.

• East Asian mathematical journal
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• 제40권1호
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• pp.37-50
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• 2024

We establish the existence, multiplicity and uniqueness of positive solutions to nonlocal boundary value systems with strongly coupled integral boundary condition by using the global continuation theorem and Banach's contraction principle.

• 자원환경지질
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• 제28권6호
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• pp.553-558
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• 1995

본 논문에서는 깊이에 따라 밀도값과 (종파)속도값이 변하는 지하 하부층들의 반사계수로부터 밀도와 속도 주상도를 구하는 알고리즘을 개발하고자 하였다 하향연속(下向連續) 혹은 박층(剝層 layer stripping) 방식 알고리즘은 적분방정식을 이용한 계산법보다 계산 과정을 상당히 줄일 수 있다. 본 논문에서는 여러 방향으로의 입사파에 의한 반사계수를 개선된 하향연속 알고리즘을 이용하여 처리하였으며, 각 깊이에서 최소자승 맞춤(fitting)을 실행하였다. 본 연구결과는 다른 하향연속 알고리즘에 비하여 상당한 성과를 보여주고 있다.

• 대한간호학회지
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• 제46권3호
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• pp.409-419
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• 2016

Purpose: The purpose of this study was to develop a breastfeeding empowerment program and to investigate the effects of the breastfeeding empowerment program on self-efficacy, adaptation and continuation of breastfeeding for primiparous women. Methods: The 5 session breastfeeding empowerment program was developed and a non-equivalent control group non-synchronized quasi-experiment design was used. Fifty-five participants were assigned to either the experimental group (n=27) or the control group (n=28). Effects were tested using repeated measures ANOVA and $x^2-test$. Results: Scores for self-efficacy, adaptation and continuation of breastfeeding of in the experimental group after program were significantly higher than 1week, 4weeks, 8weeks scores in control group. Conclusion: The effects of the breastfeeding empowerment program for elevating self-efficacy, adaptation and continuation of breastfeeding in primiparous women were validated. Therefore, this program can be recommended for vigorous use in clinical practice.

• 대한전기학회논문지
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• 제41권7호
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• pp.712-722
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• 1992

Several voltage instability/collapse problems that have occurred in the electric utility industry worldwide have gained the attention of engineers and researchers of electric power systems. This paper proposes an effective calculation scheme of the extreme loading point and nose curves(P-V curves) using modified Newton-Raphson(N-R) load flow method and the Continuation Method. This method provides detail and visual information of the power system voltage profile and operating margin ro operators and planners. In this paper, a modified load flow claculation method for ill-conditioned power systems is introduced for the purpose of seeking more precise load flow solutions and nose curves, and the Continuation Method is also used as a part of the solution algorithm for the calculation of extreme loading point and nose curves. The conventional polar coordinate based N-R load flow program is modified to avoid numerical difficulties caused by the singularity of the Jacobian matrix occuring in the vicinity of extreme loading point of heavily loaded systems. Application results of the proposed method to Klos-Kerner 11-bus system and modified IEE-30-bus system are presented to assure the usefulness of the approach.

• 대한한의학회지
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• 제42권4호
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• pp.133-149
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• 2021

Objectives: To lay the foundation for future research into Korean Medicine treatment for Rotator Cuff repair surgery patients by analyzing Korean Medical and Western Medical service utilization and treatment duration. Methods: Data sampling was performed on 2015's HIRA patient data (confidence level of 97%) to analyze patients' Korean Medical and Western Medical service usage tendency. Sampled groups were divided into two groups: i) Patients who completed their treatment within five months after the rotator cuff surgery (termination group), ii) Patients who were treated for more than five months after the surgery (continuation group). Then the patients' Korean Medical and Western Medical service usage tendency was investigated and information of these patients are arranged. Results: Out of 1,453,486 patients who were gathered for sampling, 2,461 patients in total had gone through rotator cuff repair surgery. The termination group had 517 patients and the continuation group had 541 patients. The proportion of patients who visited a Korean Medicine clinic was lower in the termination group than the continuation group. Conclusion: The continuation group received more treatments (both in Western Medicine and Korean Medicine) and spent more on medical expenses compared to the termination group. Further research is highly recommended for more efficient Western Medicine and Korean Medicine treatments and reduced medical expenditure.