• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 1999년도 하계종합학술대회 논문집
• /
• pp.773-776
• /
• 1999

For providing good quality power steadily, it is required that operators manipulate the control system of power plant with the good knowledge of power plant system and the control strategies, and cope with accidents effectively. With those requirements, it is general to train operators in power plant control room using full-scope simulator. A full scope simulator adopts the I&C instruments in the main cotrol room, so has to include I/O interface system to interface the simulation computer with I&C instruments in main control room. In already developed simulators, most of I/O interface systems are closed. vendor-dependent. proprietary systems. so have the many disadvantages in terms of cost and maintenance. In this paper. we suggest the method to configure I/O interface system for Thermal Power Plant Simulator based on standard technology which gives the advantages of ease-of-use. cost effectiveness, and simplicity of maintenanceuse by using off-the-shelf products for system integration.

• 한국철도학회논문집
• /
• 제16권4호
• /
• pp.272-277
• /
• 2013

Power quality is a term that is now extensively used in power systems applications, and in this context the voltage, current, and phase angle are discussed widely. In particular, different algorithms that are capable of detecting the voltage sag and swell information in a real time environment have been proposed and developed. Voltage sag and swell play an important role in determining the stability, quality, and operation of a power system. This paper presents ANFIS (Adaptive Network based Fuzzy Inference System) models with different membership functions to build the voltage shape with the knowledge of known system parameters, and detect voltage sag and swell accurately. The performance of each method has been compared with each other/other methods to determine the effectiveness of the different models, and the results are presented.

• 한국지능시스템학회논문지
• /
• 제1권1호
• /
• pp.9-25
• /
• 1991

This tutorial paper has been written for biologists, physicians or beginners in fuzzy sets theory and applications. This field is introduced in the framework of medical diagnosis problems. The paper describes and illustrates with practical examples, a general methodology of special interest in the processing of borderline cases, that allows a graded assignment of diagnoses to patients. A pattern of medical knowledge consists of a tableau with linguistic entries or of fuzzy propositions. Relationships between symptoms and diagnoses are interpreted as labels of fuzzy sets. It is shown how possibility measures (soft matching) can be used and combined to derive diagnoses after measurements on collected data. The concepts and methods are illustrated in a biomedical application on inflammatory protein variations. In the case of poor diagnostic classifications, it is introduced appropriate ponderations, acting on the characterizations of proteins, in order to decrease their relative influence. As a consequence, when pattern matching is achieved, the final ranking of inflammatory syndromes assigned to a given patient might change to better fit the actual classification. Defuzzification of results (i.e. diagnostic groups assigned to patients) is performed as a non fuzzy sets partition issued from a "separating power", and not as the center of gravity method commonly employed in fuzzy control. It is then introduced a model of fuzzy connectionist expert system, in which an artificial neural network is designed to build the knowledge base of an expert system, from training examples (this model can also be used for specifications of rules in fuzzy logic control). Two types of weights are associated with the connections: primary linguistic weights, interpreted as labels of fuzzy sets, and secondary numerical weights. Cell activation is computed through MIN-MAX fuzzy equations of the weights. Learning consists in finding the (numerical) weights and the network topology. This feed forward network is described and illustrated in the same biomedical domain as in the first part.

• 대한수학교육학회지:학교수학
• /
• 제18권3호
• /
• pp.503-526
• /
• 2016

본 연구의 목적은 대입 수리논술고사의 평가요소를 통하여 수리논술고사에 대한 정체성을 규명하고 실제 수리논술고사가 어떻게 출제되고 있는지 살펴보는 것이다. 수리논술고사에 관한 이해를 얻기 위해 2016학년도에 수리논술고사를 실시한 우리나라 25개 대학교 홈페이지에 있는 논술자료집에서 수리논술고사의 평가목표 및 출제방향을 분석하여 수리논술고사의 평가요소를 추출하고, 2015학년도 기출문제를 분석하여 실제 수리논술고사가 어떻게 출제되고 있는지 살펴보았다. 수리논술고사의 평가목표 및 출제방향에 나타난 평가요소는 수학적 지식, 이해력, 논리 비판적 사고력, 문제해결력, 창의력, 표현력, 논증력으로 수리논술고사의 정체성은 이런 능력, 즉 수학적 지식을 포함하는 고차원적인 사고능력과 논술능력을 평가하기 위한 시험이라고 할 수 있다. 또한, 수리논술고사 평가요소에 따라 수리논술 평가기준을 정하고 수리논술고사 기출문제를 분석하였다. 이를 통해 수리논술고사는 평가요소 중 수학적 지식, 이해력, 문제해결력을 요구하는 문제 위주로 출제되고 있음을 알 수 있었다.

• 동서간호학연구지
• /
• 제27권1호
• /
• pp.70-77
• /
• 2021

Purpose: The purposes of this study are to examine the relationship between sexual knowledge and sexual attitudes and identify factors that influence sexual attitudes among Mongolian university students. Methods: A cross-sectional study was used. Participants include 200 students from 23 universities in U city in Mongolia. Data were collected from 1 December to 30 December of 2019. A self-report questionnaire through Google survey was used. Data were analysed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients, and multiple regression analyse with SPSS 26.0 for Window Program. Results: We found the differences between sexual knowledge and sexual attitudes according to participants' general characteristics, sex education, and sexual knowledge (t=5.43, p<.001) and sexual attitudes (t=2.21, p=.028), sexual experience and sexual knowledge. There was no correlation with marriage thought among sexual knowledge, sexual health and pregnancy and childbirth, and sexual attitudes. The correlations between the remaining variables were high. Sexual knowledge was the most influential factor on sexual attitudes followed by the sexual act (β=.30, p<.001), reproductive organs (β=.29, p<.001), solving sexual desire (β=-.25, p<.001), sexual experience (β=-.16, p=.021), and sex education (β=-.16, p=.028) with an explanatory power of 20.0%. Conclusion: The findings of this study may provide a basic data and help to understanding of sexual attitudes among Mongolia university students.

• 한국산학기술학회논문지
• /
• 제20권11호
• /
• pp.348-360
• /
• 2019

본 연구는 임상간호사의 전문직 삶의 질에 영향을 미치는 요인을 확인하여 전문직 삶의 질을 높이기 위한 기초자료 제공을 위해 수행되었다. 연구대상자는 일 광역시 3개 종합병원에 근무하는 간호사 217명으로, 2019년 6월 3일부터 6월 14일까지 구조화된 설문지를 사용하였고, 수집된 자료는 SPSS Statistics 23.0 program을 이용하여 기술통계, t-test, ANOVA, Scheffé test, Pearson's Correlation Coefficient, Stepwise multiple regression으로 분석하였다. 연구결과, 공감만족은 인문학적 소양과는 양의 상관관계, 소진과는 음의 상관관계가 있었고, 소진은 인문학적 소양과는 음의 상관관계, 직무 스트레스와 이차 외상성 스트레스와는 양의 상관관계가 있었으며, 이차 외상성 스트레스는 직무스트레스와 양의 상관관계가 있었다. 공감만족에 영향을 미치는 요인으로는 소진, 간호만족, 임상경력으로 나타났으며 48.5%의 설명력을 보였고, 소진에 영향을 미치는 요인에는 공감만족, 이차 외상성 스트레스, 간호만족, 기혼, 직무 스트레스로 나타났고 68.8% 설명력을 보였으며, 이차 외상성 스트레스에 영향을 미치는 요인은 소진과 급여로 나타났으며 21.9%의 설명력을 보였다. 이상의 연구 결과 소진은 공감만족과 이차 외상성 스트레스 모두에 영향을 미치므로 소진을 예방하는 노력이 요구된다.

• 대한지역사회영양학회지
• /
• 제26권6호
• /
• pp.455-466
• /
• 2021

Objectives: The purpose of this study was to investigate the effects of internal and external capacity on the practical capacity for food waste disposal in adults. Methods: The study subjects were 410 adults who answered a structured questionnaire. The survey was conducted in January 2021. Data were analyzed through descriprive analysis, t-test, ANOVA, and multiple regression analysis using the SPSS Win 24.0. Results: First, in the analysis of internal capacity, attitude (3.95 out of 5 points) scored higher than knowledge (3.59 points). Attitudes showed significant differences according to gender (P < 0.001), age (P < 0.001), and income (P < 0.001). Knowledge showed significant differences according to gender (P < 0.01) and age (P < 0.05). Second, in the analysis of capacity, market constraints (3.73 points) scored the highest, followed by institutional conditions (3.48 points) and reference group (3.36 points). Market constraints differed according to gender (P < 0.001), and institutional conditions differed according to income (P < 0.001). There was a significant difference in the reference group according to the level of education (P < 0.05) and income (P < 0.05). Third, the practical capacity scores appeared in the order of separating discharge behavior, using behavior, purchasing behavior, and leadership behavior. Separating discharge behavior showed significant differences according to gender (P < 0.001), education level (P < 0.05), and income (P < 0.01). Using behavior showed a difference according to gender (P < 0.01), and purchasing behavior showed a significant difference according to income (P < 0.05). Leadership behavior showed no difference according to demographic factors. Fourth, internal capacity and external capacity showed a significant positive relationship with practical capacity. Factors affecting purchasing behavior were knowledge, attitude, institutional conditions, and reference group, and their explanatory power was 53%. Factors influencing using behavior were knowledge, attitude, institutional conditions, and reference group, and had an explanatory power of 37%. Leadership behavior was influenced by institutional conditions and the reference group, with an explanatory power of 31%. Conclusions: Internal capacity, external capacity, and practical capacity show differences according to demographic factors. Factors influencing the practical capacity of adults were knowledge, attitude, institutional conditions, and reference group.

• 지식경영연구
• /
• 제24권2호
• /
• pp.65-85
• /
• 2023

본 연구는 최고경영진의 인지적 특성이 R&D투자에 어떤 영향을 미치는지 분석한다. 주의기반관점(attention-based view)에 기반하여 최고경영진의 미래지향성과 위험감수성이 R&D투자 수준을 높일 수 있음을 제시한다. R&D활동은 장기적으로 독점적인 지식을 생성하는 것을 목표로 삼고 있기에 기업의 미래성장가능성 및 경쟁우위를 이해하기위해 최고 경영진의 미래지향성과 위험감수성이 R&D투자에 미치는 영향을 이해하는 것이 중요하다. 추가적으로 최고경영진의 영향력을 조절하는 요인으로 CEO 관련 특성을 제시한다. CEO는 최고경영진의 리더역할을 하고 있기 때문에 만약 CEO의 의사결정권한이 높은 수준으로 집중되는 경우 최고경영진 자체의 특성이 R&D에 미치는 영향이 감소할 수 있다. CEO 특성 중 CEO 이사회의장 겸직 여부 및 CEO 소유지분을 통해 CEO의 높은 영향력을 측정하였다. 1994년부터 2015년까지 미국 제조업체 837개의 샘플을 기반으로, 최고경영진의 미래지향성 및 위험감수성이 높을수록 R&D집중도가 증가함이 나타났다. 그러나 CEO가 이사회의 의장도 겸임하며 높은 지분을 보유할 때, 최고경영진의 R&D집중도에 대한 영향력이 감소하였다. 이는 최고경영진과 CEO 사이에 상호작용이 있으며, CEO의 영향력이 커지고 의사결정권한이 높은 상태 및 구조에 따라 변화할 수 있음을 제시한다. 결론적으로 본 연구의 실증 연구 결과는 최고경영진의 주의와 CEO의 영향력 정도가 장기적인 관점에서의 지식 활용 및 개발을 촉진시키는 데 중요한 요소임을 시사한다.

• 한국전자파학회논문지
• /
• 제14권9호
• /
• pp.944-949
• /
• 2003

본 논문에서는 InCaP/GaAs HBT공정을 이용하여 낮은 DC 파워소모, 낮은 NF, 낮은 IMD 와 광대역 특성을 갖는 Ku-band LNB용 이중평형믹서를 설계하였다. 제작된 믹서는 3 V, 16 mA 의 U조건과 -23 dBm의 RF입력 조건하에서 5 dB의 변환이득, 14 dB의 NF, 17.9 GHz의 대역폭 그리고 50.34 dBc의 IMD특성을 얻었다. 낮은 IMD 특성, 광대역폭, 낮은 파워소모 특성은 InGaP/GaAs HBT의 선형성과 광대역 입력 정합기법과 바이어스 점의 최적화를 통해 얻을 수 있었다.

• 한국학교ㆍ지역보건교육학회지
• /
• 제10권2호
• /
• pp.15-27
• /
• 2009

Background and Goals: This study set out to apply the Theory of Planned Behavior (TPB), which is known to provide good explanations about human behavior, and test it to see if it could predict safety behavior by affecting the intention for safety behavior and perceived behavioral control and if intention for safety behavior would be influenced by attitude toward behavior, subjective norm, and perceived behavioral control. Methods: The subjects were 98 dental technology majors in D City. The questionnaires were distributed, filled out and collected on the spot. Each item was measured on a seven-point scale, and it's interpreted that the higher mean of each item would translate into safety behavior. Results: The analysis results of the Theory of Reasoned Action (TRA) variables indicate that only subjective norm ($\beta$ = .528, p < .000) had explanatory power of 27.2% (F = 37.170, P <.001) for intention for safety behavior. The results show that subjective norm and attitude toward behavior affect intention for safety behavior. The analysis results of the TPB variables revealed that intention for safety behavior had explanatory power of 26.6% (F = 36.072, p <.000) for behavior. When intention was added by perceived behavioral control, the explanatory power increased to 34.5% (F = 26.530, p <.000). And when it's added by knowledge, the explanatory power increased to 39.0% (F =21.661, p <.000). The results suggest that intention has the biggest influence on predicting safety behavior. Conclusion: The results show that the TPB model by Ajzen (1985) has greater forecasting power for intention and act of safety behavior than the TRA model by Fishbein & Ajzen (1980) and the TPB model can applied in the prediction of safety behavior. Thus safety behavior is considered as behavior whose determination control is limited. And safety education programs that add knowledge to the TPB variables will help the students promote their safety behavior.