• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.494-494
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• 2000

This paper demonstrates that the largest Lyapunov exponent $\lambda$ of recurrent neural networks can be controlled by a gradient method. The method minimizes a square error $e_{\lambda}=(\lambda-\lambda^{obj})^2$ where $\lambda^{obj}$ is desired exponent. The $\lambda$ can be given as a function of the network parameters P such as connection weights and thresholds of neurons' activation. Then changes of parameters to minimize the error are given by calculating their gradients $\partial\lambda/\partialP$. In a previous paper, we derived a control method of $\lambda$via a direct calculation of $\partial\lambda/\partialP$ with a gradient collection through time. This method however is computationally expensive for large-scale recurrent networks and the control is unstable for recurrent networks with chaotic dynamics. Our new method proposed in this paper is based on a stochastic relation between the complexity $\lambda$ and parameters P of the networks configuration under a restriction. Then the new method allows us to approximate the gradient collection in a fashion without time evolution. This approximation requires only $O(N^2)$ run time while our previous method needs $O(N^{5}T)$ run time for networks with N neurons and T evolution. Simulation results show that the new method can realize a "stable" control for larege-scale networks with chaotic dynamics.

• 의료커뮤니케이션
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• 제13권2호
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• pp.109-115
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• 2018

Background: The study is descriptive research study to investigate the self-directed learning ability to explore the facts that influence of anatomy using cadaver dissection beginning nursing students. Methods: A descriptive research design was used. The data was collected from 31st May to 7 June, 2016. The participants were total 121 first-year nursing students in C University. This anatomy practicum course was composed of three session, and each session was composed of 3hours, 60minutes of body structure and anatomy lecture, 90 minutes of cadaver dissection, and 30minutes of summary. Results: The results of the study showed that satisfaction with cadaver dissection was statistically significant in the usefulness in connection with the major of nursing (r=.543, P<.001), educational understanding (r=.465, p<.001), and nursing learning motivation (r=.517, p<.001). As the nursing learning motivation increased, self-directed learning ability increased. Also nursing learning motivation influenced self-directed learning (${\beta}=0.266$, p<.01). Conclusion: It is necessary to develop a program that can link theoretical education with practicum education of anatomy using cadaver dissection for efficient learning of the anatomy major courses of nursing students.

• International Journal of Internet, Broadcasting and Communication
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• 제13권2호
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• pp.82-92
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• 2021

Purpose: It has been reported that the diversity and abundance of microbes in the vagina decrease due to the use of antimicrobial agents, and the high recurrence rate of female vaginitis due to this suggests that a new treatment is needed. Methods: In the experiment, we detected that 10% potassium sorbate solution, 1% eucalyptus oil solution, 1% tea tree oil solution, 400 µL/10 mL grapefruit seed extract solution, 100% lactic acid, 10% acetic acid solution, and 10% lactic acid solution were prepared and used. After adjusting the pH to 4, 5, and 6 with lactic acid and acetic acid in the mixed culture medium, each bacterium was inoculated into the medium and incubated for 72 h at 35℃. Incubate and 0 h each. 24 h. 48 h. The number of bacteria was measured after 72 h. Results: In the mixed culture test between lactic acid bacteria and pathogenic microorganisms, lactic acid bacteria showed good results at pH 5-5.5. Potassium sorbate, which has varying antibacterial activity based on the pH, killed pathogenic bacteria and allowed lactic acid bacteria to survive at pH 5.5. Conclusion: The formulation ratio obtained through this study could be used for the development of a feminine cleanser that can be used as a substitute for antibacterial agents. Further, the findings of this study may be able to solve the problem of antimicrobial resistance in the future.

• 한국간호교육학회지
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• 제29권4호
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• pp.427-439
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• 2023

Purpose: This study aimed to evaluate the effects of a nursing education program for hyperglycemia patient care using standardized patients. Methods: This study used a nonequivalent control group pre-test and post-test non-synchronized design. A total of 50 senior university nursing students who had completed an adult nursing course participated in this study (experimental group, n=24; control group, n=26). This nursing education program was developed according to the stages of analysis, design, development, implementation, and evaluation. The collected data were analyzed using χ² -test, Fisher's exact test, independent t-test, paired t-test, and repeated measure ANOVA. Results: Significant differences were shown between the experimental and control groups in clinical performance ability (F=277.41, p<.001), communication skills (F=47.18, p<.001), self-efficacy (F=3.81, p=.031), and learning satisfaction (t=2.25, p=.033). Problem-solving ability was not statistically significant between the groups. Conclusion: The nursing education program for hyperglycemia patient care using standardized patients was effective in improving nursing students' clinical performance ability, communication skills, and learning satisfaction. Therefore, it is proposed that the education program developed in this study be used as part of an education program to enhance nursing students' abilities in caring for hyperglycemia patients.

• 가정과삶의질연구
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• 제16권2호
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• pp.1-10
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• 1998

This study purpose to know the degree of adolescent consumer's conspicuous consumption how difference do adolescent consumers' conspicuous consumption have by socio demographic variables socio-psychological variables consumer ability. Therefore we suggest the adolescent consumer's sound consumption to consumer education. To approach to above purpose the research question are as the followings. 1) The average level of conspicuous consumption a little low median point. This implies that comsumer education is necessary for the adolescent consumer in order to reduce the level of conspicuous consumption. 2) Theadolescent consumers' consumption differs significantly according to the sex(p<0.05) monthly mean income of family(P<0.01) degree of taking in massmedia (P<0.01) subjective status on oneself(P<0.01) consumer socialization(P<0.01) 3) According to the results of the regression analysis examining the relative influences of variables affecting for conspicuous consumption the rela ive importance of the variables ; degree of taking in massmedia sex consumer knowledge communication with peers consumer attitude and the amount of allowance.

• 한국수소및신에너지학회논문집
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• 제27권3호
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• pp.318-327
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• 2016

In order to improve the performance of temperature field measurements by CT-TDLAS (Computer Tomography Tunable Diode Laser Absorption Spectroscopy), a new reconstruction algorithm, named two-ratios-of-three-peaks method is proposed in this paper. Further, two methods for selecting appropriate initial values of the iterative calculation of CT-TDLAS are proposed. One is MLOS (multiplicative line of sight) method and the other one is ALOS (additive line of sight) method. Two-ratios-of-three-peaks (2R3P) algorithm combined with MART (multiplicative algebraic reconstruction technique) is finally developed for the enhancements of reconstructive calculations. The results have been compared with those obtained by the conventional one-ratio-of-two-peaks (1R2P) algorithm. In order to evaluate the performance of this algorithm, numerical test has been performed using phantom Gaussian temperature distributions with $11{\times}11$ square mesh. The performance of the constructed algorithm has been demonstrated by comparing the results obtained in actual burner experiments with those obtained by thermocouples. It has been verified that 2R3P algorithm with MART and MLOS showed best performance than that of 1R2P algorithm.

• 정보보호학회지
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• 제2권4호
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• pp.37-47
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• 1992

이 논문에서 우리는 여러 가지 분할 항등식을 유도했고 제한된 분할에 관한 새로운 항등식을 증명하고, 분할의 기본적인 이론과 분할함수(Partition Number Function)가 다항식 함수가 아니라는 것을 보이며, n의 분할의 수 p(n)에 대한 ㅎ계(Lower Bound)를 얻기 위해 Stirling의 n !에 대한 근사값을 소개한다. 그리고Hardy-Ramanujan 공식, Euler 항등식과 p(n)의 순환식을 유도하며, 그리고 d$_{m}$ (n)이 n을 m개의 부분으로 분할하는 분할의 수를 나타낼 때 우리는 d$_{m}$ (n) 에 관한 일반적인 공식을 p(n)과 함께 행렬식의 형태로 표현한다.

• 한국시뮬레이션학회논문지
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• 제2권1호
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• pp.31-44
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• 1993

Zeigler's DEVS(Discrete Event Systems Specification) formalism supports formal specification of discrete event systems in a hierarchical , modular manner. Associated are hierarchical, distributed simulation algorithms, called abstract simulators, which interpret dynamics of DEVS models. This paper deals with performance evaluation of P-DEVSIM ++, a parallel simulation environment which implements the DEVS formalism and associated simulation algorithms in a parallel environment. Performance simulator has been developed and used to experiment models of parallel simulation executions in different conditions. The experimental result shows that simulation time depends on both the number of processors in the parallel system and the communication overheads among such processors.

• 산업융합연구
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• 제22권5호
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• pp.89-96
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• 2024

MZ세대 간호대학생의 의사소통능력과 대인관계유능성의 관계에서 공감능력의 매개효과를 확인하기 위한 서술적 조사연구이다. 본 연구의 대상은 MZ세대에 해당되는 1981년에서 2006년생 간호대학생 129명이며, 자료수집 기간은 2023년 5월 20일부터 7월 30일까지였다. 수집된 자료는 SPSS 25.0 program으로 분석하였으며, 공감능력의 매개효과는 Baron과 Kenny의 3단계 매개효과 검증 절차를 밟았고, 매개효과의 통계적 유의성을 검정하기 위해 Sobel test를 실시하였다. 분석 결과, 대인관계유능성에 의사소통능력(β=.45, p<.001)과 공감능력(β=.18, p=.008)이 유의한 영향을 주었고, 이들 변수는 대 인관계유능성에 대해 48.4%의 설명력이 있는 것으로 나타났으며, 의사소통능력과 대인관계유능성의 관계에서 공감능력은 부분매개효과(z=2.39, p=.016)가 있는 것으로 나타났다. 본 연구 결과를 바탕으로 미래의 간호를 담당하게 될 비대면 문화에 익숙한 MZ세대의 특성에 대한 이해와 함께 이들의 대인관계유능성을 향상시킬 수 있는 실효성 있는 프로그램 개발이 필요하다.

• 한국정보통신학회논문지
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• 제13권9호
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• pp.1947-1954
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• 2009

MANET(Mobile Ad-Hoc NETwork)에서 서비스 발견 기법은 서비스를 요구하는 노드가 서비스를 제공하는 노드를 발견하고 제공하는 서비스를 전달하기 위한 핵심응용기술이다. 그러나 MANET의 특징으로 기존의 서비스 발견 기법들 이용하여 빠르게 신뢰할 수 있는 서비스를 발견하고 안정적인 서비스 전달하고 네트워크의 확장성을 지원하는 문제 해결이 아직까지 어려운 실정이다. 본 논문에서는 MANET을 구성하는 이동 노드들 중 신뢰도가 높은 서비스 제공 노드들의 서비스를 빠르게 발견하고 안정적으로 서비스를 전달할 수 있도록 서비스 제공자의 신뢰도 평가를 통한 DHT(Distributed Hash Table)를 구성으로 안정적인 서비스를 제공하는 서비스 발견 기법을 제안한다. 제안된 서비스 발견 기법은 신뢰성 있는 서비스 발견뿐만 아니라 DHT의 특징을 응용하기 때문에 MANET의 낮은 서비스 발견 메시지의 오버 헤드를 유지시켜 네트워크의 확장성을 높일 수 있다. 이러한 제안 기법을 기존의 서비스 발견 기법들과 비교하는 시뮬레이션을 통해 더 나은 성능을 보임을 확인할 수 있다.