• 아동학회지
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• 제30권2호
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• pp.1-13
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• 2009

This study examined the extent to which young children's scientific inquiry capabilities and curiosity are affected by their mothers' awareness about science education and their mutual interaction. Instruments were Levels of Mothers' Awareness about Science Education and Interaction with Children (Jeon, 2006), Children's Scientific Thinking Capabilities (Lee, 2000), and Children's Curiosity (Lee, 2001). Differences between high-and low-ranked groups were analyzed by t-tests. Results showed that children whose mothers displayed high levels of awareness about science education and mutual interaction showed better scientific inquiry capabilities and curiosity than children whose mothers did not display such high levels. By confirming the significant role of mothers in their children's science education these results can be an aid to parent education.

• 한국음향학회지
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• 제14권6호
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• pp.21-26
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• 1995

본 연구에서는 사각형 음향 진동체가 무한 배플에 고정되어 있을때 진동체 상호간의 방사 임피던스의 양을 예측하기 위하여 적분식을 유도하고 이를 수치해석 하였다. 상호 방사 임피던스를 방사 저항 및 방사 리액턴스로 분리하여 계산하고 이를 ka및 kd의 함수로 출력 하였다. 방사 저항은 ka값의 증가에 따라 요동을 하면서 감소 하였다. 방사 리액턴스는 ka값의 증가에 따라 감소 하였다. 또한 상호 방사 임피던스는 ka의 값이 클수록 방사 임피던스의 양은 요동을 하면서 감소 하였다. 그러나 ka가6, 13및 19의 근처에서는 오히려 상호 임피던스의 영향이 거의 없음을 볼 수 있었고 진동체 상호간의 거리가 멀어질수록 임피던스의 영향이 현저히 감소함을 보았다. 또한ka의 값이 클수록 진동체 상호간의 배치에서 45도의 경우에 상호 간섭이 오히려 감소하였다.

• ETRI Journal
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• 제33권2호
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• pp.210-218
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• 2011

Battiti's mutual information feature selector (MIFS) and its variant algorithms are used for many classification applications. Since they ignore feature synergy, MIFS and its variants may cause a big bias when features are combined to cooperate together. Besides, MIFS and its variants estimate feature redundancy regardless of the corresponding classification task. In this paper, we propose an automated greedy feature selection algorithm called conditional mutual information-based feature selection (CMIFS). Based on the link between interaction information and conditional mutual information, CMIFS takes account of both redundancy and synergy interactions of features and identifies discriminative features. In addition, CMIFS combines feature redundancy evaluation with classification tasks. It can decrease the probability of mistaking important features as redundant features in searching process. The experimental results show that CMIFS can achieve higher best-classification-accuracy than MIFS and its variants, with the same or less (nearly 50%) number of features.

• Korean Membrane Journal
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• 제3권1호
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• pp.39-50
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• 2001

The counter-diffusion of two gaseous substances permeating a polymeric membrane has been investigated both experimentally and theoretically. The aim of the study was to find mutual effects, if any, that could influence the permeability and diffusivity data. The experimental data were obtained with an isostatic permeameter operating at ambient pressure and 303 K: helium, nitrogen, carbon dioxide methane were used as permeating gas at different partial pressure; helium or nitrogen as equilibrating or carrier gas. No evident mutual effect of the counter-diffusing gas was observed. The theoretical analysis gave some insight into the phenomena and it was concluded that at near-atmospheric pressures, and in the absence of swelling phenomena no mutual interaction exists. On a theoretical basis any mutual interaction between diffusing and counter-diffusing gases could only occur: i) at high pressures , when the free movement of permeating gas molecules within the polymer is hindered by the counter-diffusing gas; ii) when a large part of the free volume fraction is occupied by the counter--diffusing gas; iii) swelling phenomena modify the structure and free volume fraction of the polymer.

• 디자인학연구
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• 제19권5호
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• pp.293-302
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• 2006

20세기 후반부터의 정보전자기술 발달은 인간에게 3차원에서 다차원으로 공간인식의 확장을 가져다 주었고, 공간 또한 인간의 경험, 인지, 체험의 이미지반응능력이 가능해지면서 인간과의 상호유기적 관계를 형성하게 되었다. 이러한 상호유기적 관계는 현존하고 있는 물리적 공간 중에서 정보 전자기술을 적극적으로 도입하고 있는 전시공간에서 잘 보여지고 있다. 이에 본 연구에서는 정보전자기술이 도입된 체험형 전시공간에서 정보와 이용자의 인터랙션 매개체로서의 전시시설을 중심으로 전시시설과 인터랙션 형태의 현황을 비교 조사하였다. 이는 인간과 공간의 상호유기적 관계속에서 일어날 수 있는 여러 현상들을 예측하여 인간과 공간의 다양한 커뮤니케이션 활동의 역할을 위한 장으로서의 공간에 반영하고자 하는 궁극적인 목적을 위한 것으로 향후 전시에 대한 조사연구가 전시공간측만 아니라 변화되고 있는 이용자의 행태연구를 통해 전시공간과 이용자행태와의 상호관련성을 밝히는 연구를 지속적으로 수행 할 것이다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 추계학술대회 논문집
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• pp.177-178
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• 2006

• 아동학회지
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• 제9권1호
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• pp.33-46
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• 1988

The purpose of this study was to investigate the effects of age, sex, and friendship type on child's shared knowledge of a friend. The following hypotheses were raised; Child's shared knowledge of friend would increase with age, shared knowledge of girls would be higher than that of boys shared knowledge of girls would be higher than that of boys shared knowledge in a mutual friendship would be higher than in a unilateral friendship, there would be an interaction effect between age and friendship type in child's shared knowledge of friend. The subjects of this study consisted of 80 boys and girls, 8- and 11-year-olds. Shared knowledge of a friend was measured with a modified version of the 70 picture items developed by Ladd and Emerson (1984). The obtained data were analyzed by three-way ANOVA. Child's shared knowledge of a friend increased with age. Girls exhibited greater ORSK (other-referenced shared knowledge) than did boys, but there was no significant difference between girls and boys in SRSK (the selfreferenced shared knowledge). Mutual friendships exhibited greater SRSK than did unilateral friendships, but there was no significant difference between mutual friendship and unilateral friendship in ORSK. There was a significant interaction effect between age and friendship type in child's shared knowledge of friend.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.558-561
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• 1993

The main difference between a linear system and a nonlinear system is the existence of direct interactions between input signals. These interactions will be classified into three types, (1) self-interaction among different order terms of control signals, (2) static mutual interactions between the control signals, and (3) dynamic interactions through the coefficient venctor fields of the control variables. In this paper, we will show that interactions of type (2) and (3) can be avoided by applying an appropriate dynamic compensator, while the interaction of type (1) is fatal.

• Journal of Welding and Joining
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• 제22권4호
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• pp.73-81
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• 2004

Failure mechanisms of welded joints under fatigue loads are interpreted that multiple collinear surface cracks initiating randomly along the weld toes propagate under the mutual interaction and coalescence of adjacent two cracks. To estimate fatigue crack propagation life for three types of the representative welded joints, i.e. non-load carrying cruciform, cover plate and longitudinal stiffener joint, the stress intensity factors at the front of the surface cracks have to be calculated, which are influenced strongly by the geometry of attachments, weld toes and the crack shapes. For the effective calculation of the stress intensity factors the Mk-factor was introduced which can be derived by a parametric study performed by FEM considering influence of the geometrical effects. The fatigue life of the cruciform joint was estimated by using the Mk-factors and the method considering the propagation mechanisms of the multiple surface cracks. Analysis results for the fatigue life had a good agreement with that of experiment.

• 한국유기농업학회지
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• 제26권1호
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• pp.73-82
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• 2018

The alternative marketing can be defined a face to face regional marketing that commodities are traded based on mutual trust and understanding which have been accumulated through relationships formation and interaction between producers and consumers. Essences of an alternative marketing are formation, expansion and solidarity of relationships between producers and consumers, mutual trust and communication, and cooperation. Based on these, it makes it's principle to trade regionally and shorten food mileage and psycho-social distance. For example, there are local food direct stores, local food markets, farmer's markets, food package sales, CSA, local food school or public meal and so on. In alternative marketing, the relationship among them is especially considered very important in marketing process, not just a flow of commodities.