• 한국초등과학교육학회지:초등과학교육
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• 제39권3호
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• pp.353-368
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• 2020

This study analyzed the teacher's perception for influence of behavioral characteristics of scientifically-gifted students on general students in elementary school science class. To do this, we selected the eight elementary school teachers who were conducting the regular science classes including scientifically-gifted students belonging to the gifted education institutes in Seoul and conducted individual in-depth interviews. The analysis of the results reveal that the teachers mentioned seven behavioral characteristics of scientifically-gifted students in general elementary school science classes.: 'excellent in designing and performing experiments', 'playing a leading role in experiments', 'expressing their abundant prior knowledge frequently', 'attempting their tasks with curiosity and persistence', 'displaying scientific creativity', 'often asking scientific questions in detail', and 'expressing their opinions logically'. These behavioral characteristics of scientifically-gifted students had positive effects on general students, such as 'providing them with a successful experience in conducting experiments', 'improving understanding of science class contents', 'developing scientific thinking and reflective thinking', and 'improving their students' positive experiences about science'. However, the excessive learning-driven behaviors of scientifically-gifted students had negative effects on general students, such as 'limiting opportunities for general students to participate in classes', 'conducting passive exploration centered on results', and 'causing conflicts with general students'. Educational implications of these findings are discussed.

• 한국유체기계학회 논문집
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• 제11권3호
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• pp.43-49
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• 2008

The pump control valve is a butterfly valve that has an eccentric rotating axis. It is not only used as a butterfly valve to control the flow rate or pressure, but also as a check valve to prevent backward flow. A new design method of eccentric rotating axis is proposed to design the valve. The height of the rotating axis is determined through flow field analysis. A general purpose of computational fluid dynamics software system, Fluent is used to simulate the fluid flow. Flow field analysis is performed for various heights of the rotating axis and different opening angles of the valve. A characteristic function is defined for estimating the flow characteristics based on the results of flow field analysis. The characteristic function is defined in order to determine the height of the rotating axis. An optimization problem with a characteristic function is formulated to determine the amount of eccentricity. The height of the Totaling axis of the valve is determined through solving the optimization problem.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전력기술부문
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• pp.450-453
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• 2003

This paper presents the estimation on Load Characteristic Factor(k) which is considered to load pattern and seasonal characteristic of consumer. We can calculate the loss of distribution networks through the equation composing of Load Factor(LF), Loss Load Factor(LLF) and load characteristic factor(k). This equation is similar to the method of Regulator-General Victoria, Australia. Generally, the conventional method for calculating the distribution losses uses k with a constant value from 0.1 to 0.3. However, the k which is a relationship between LF and LLF can be varied by load pattern and seasonal characteristics. It is necessary to estimate the k according to load characteristics. This paper shows the result for recalculating k using the KEPCO's SOMAS data measured in distribution networks.

• 대한치과기공학회지
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• 제10권1호
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• pp.89-111
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• 1988

치과기공소 근무자들의 직무관련 요인과 직무만족 및 조직몰입간의 상관관계를 구명하고저 대한 치과기공사 협회에 가입된 치과기공소에서 1987년 2월 6일부터 2월 27일 사이에 종사한 근무자 504명을 대상으로 우편을 이용한 설문조사 결과는 다음과 같다. 1. 일반적 특성 요인군과 직무만족 요인군간의 정준상관관계는 Rc=0.48로 통계학적으로 유의하였으나, 일반적 특성요인군과 조직몰입 요인군간의 정준상관관계는 Rc=0.37로 통계학적으로 유의하지 않았다. 2. 직무관련 요인군과 직무만족 요인군간의 정준상관관계는 Rc=0.69로 높았으며, 직무관련 요인 중 급여적정성, 승진기회, 부가급부 적정성 등이 통계학적으로 유의하게 영향을 미치는 요인이었다. 3. 직무관련 요인군과 조직몰입 요인군간의 정준상관관계는 Rc=0.61로 높았으며, 직무관련 요인 중 급여 적정성, 기술습득기회, 업무 중요성 등이 통계학적으로 유의하게 영향을 미치는 요인이었다. 4. 직무만족에 통계학적으로 유의하게 영향을 미치는 직무관련 요인은 일반특성에 따라 달랐다. 즉 연령, 경력, 직무 등의 경우 급여 적정성으로 동일하였으나 성, 재직기간, 자격증 유무의 경우에서는 부가급부 적정성, 거래처와의 관계로 직무관련 요인이 달랐다. 5. 조직몰입에 통계학적으로 유의하게 영향을 미치는 직무관련 요인은 남자의 경우 급여 적정성인 반면 여성의 경우 부가급부 적정성, 30세 미만 근무자의 경우 업무중요성인 반면 30세 이상 근무자의 경우 급여 적정성, 경력은 5년 미만 근무자의 경우 급여 적정성인 반면 5년 이상 근무자의 경우 단조로움 등으로 일반특성에 따라 달랐다. 6. 치과기공소 근무자의 직무만족 및 조직몰입에 가장 큰 영향을 미치는 직무관련 요인은 급여 적정성이었다.

• 산업기술연구
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• 제24권B호
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• pp.37-46
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• 2004

The purpose of this study are observing changing direction of lobby space that happen by change of medical environment investigating lobby space of General Hospital by our country's medical policy change time and supply pabulum that need in forward Hospital Architecture planning. Results of this study are as follows ; Since Whole National Insurance enforcement from 1993 to 1995, form of general hospital lobby is form that outpatient entrance and inpatient entrance are detached. And lobby function divided to waiting space for medication, requisition space and also that is appearing being detached with rest space for user. ntil 1999 since 1996 that is since Medical Treatment Information System construction, the biggest characteristic of General Hospital lobby form is making Hospital Street itself do improving efficiency of flow planning being included in lobby.

• 대한전자공학회논문지
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• 제18권2호
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• pp.44-53
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• 1981

Stochastic feference를 가진 두개의 양자화 시스템을 분석하고 비교하였다. 양자화된 출력신호에 대하여 invariance 성격을 갖기 위한 조건이 서로 같다는 것이 보여졌다. Stochastic fererence 신호를 이용한 polarity coincidence 방법에 의한 상관관계 함수 추정이 여기서 구한 일반적 성질의 특수한 경우이다. 과거의 stochastic computing은 여기서 고려한 첫 번째 system으로부터 나오고 그리고 LG Robert가 이용한 특성은 두 번째 시스템의 일반적 성질의 특수한 경우를 이용했다는 것을 보였다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.303-306
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• 2003

본 연구에서는 국내 일괄발주방식에 적합한 공사계약일반조건 문제점 도출을 목적으로 수행되었다. 이를 위하여 국내외의 일괄발주방식에 관한 문헌고찰과 계약서 구성체계를 조사하였다. 또한, 국내 표준계약서와 국외 일괄발주방식의 표준계약서 비교를 통하여 국내 설계시공일괄발주방식에 사용하고 있는 표준계약서에 누락되거나 미흡한 조항을 분석하고, 실무자 설문조사를 통하여 일괄발주방식에 필요한 주요 조항을 조사하였다. 이를 통하여 도출된 문제점을 해결하기 위하여 국내의 일괄발주방식에 적합한 공사계약 일반조건의 개선을 위한 기초 자료를 마련하였다.

• Communications for Statistical Applications and Methods
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• 제8권2호
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• pp.383-394
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• 2001

This paper is a generalization of single and two-level skip-lot sampling plans to n-level. On every skipping inspection of the n-level skip-lot sampling plan, not only the number of consecutive lots to be accepted but also the fraction of lots to be inspected can be freely choosed. The general formulas of the operating characteristic function, average fraction inspected, average sample number and average outgoing quality in n-level skip-lot sampling plan are derived. The operating characteristic curves, average sample number and average outgoing quality of a reference plan, two-level and five-level skip-lot sampling plans are compared.

• International Journal of Control, Automation, and Systems
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• 제4권4호
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• pp.486-494
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• 2006

In this paper, we present the complete isotropy analysis of a caster wheeled omnidirectional mobile robot (COMR) with nonredundant/redundant actuation. It is desirable for robust motion control to keep a COMR close to the isotropy but away from the singularity as much as possible. First, with the characteristic length introduced, the kinematic model of a COMR is obtained based on the orthogonal decomposition of the wheel velocities. Second, a general form of the isotropy conditions of a COMR is given in terms of physically meaningful vector quantities which specify the wheel configuration. Third, for all possible nonredundant and redundant actuation sets, the algebraic expressions of the isotropy conditions are derived so as to identify the isotropic configurations of a COMR. Fourth, the number of the isotropic configurations, the isotropic characteristic length, and the optimal initial configuration are discussed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.756-757
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• 2015

This paper deals with characteristic analysis of surface mounted permanent magnet synchronous motor according to a phase-separation of stator. The characteristic analysis of designed model is performed by finite element analysis(FEA), and the result are shown that there is no difference between the two models in comparison with a general SPMSM. Finally, this study verifies the feasibility of SPMSM with separated stator core. The experimental data is shown the validity of this paper.