• 정신신체의학
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• 제2권1호
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• pp.46-51
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• 1994

Model' is one of the well-used, but poorly understood word in the neurobehavioral research. After Darwin's evolutionary theory, it has been generally believed that human is different from animals in terms of the complexity, not of the essential. This notion could be applied to the mind as well as body. Therefore, it became possible to establish animal models in the scientific field of mind. Experimental analysis of the animal behavior becomes an important area for establishing an animal model of human psychopathology because behavior is the ambassador of the mind. A model emphasizes a structural correspondence between sets of causally related variables in two different domains such as the animal and the human. The first selection of elements of the two domains in correspondence called the initial analogy. Once the initial analogy is formed. causally related variables in the two domains are examined and arrayed The structural parallel is the formal analogy of a model, and similarities between corresponding variables are called material analogy. Models may serve any of three major functions ; heuristic, evidential and representative. In many cases, utilizing models may be more practical than directly assessing the domain of primary interest, since technical and/or ethical problems are more serious in the human domain. Although modeling is important to study human psychopathology, rare animal models approved to be a good model for the human psychopathology up to now. Developing the appropriate model is urgent to solve many problems raised from human psychopathology.

• Journal of Information Science Theory and Practice
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• 제4권3호
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• pp.57-70
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• 2016

Purpose The purpose of the study is to identify the need of a mobile based library information and service delivery system in developing countries, identify the services that are possible to provide with the help of mobile phones and their applications, design a mobile based library information and service delivery system, and identify major challenges regarding mobile based library information and service delivery systems.Design/ Methodology/ Approach The research is exploratory in nature. This paper is based on a review of literature, survey information, and on the author’s own viewpoints. A comprehensive search of scientific literature has been done along with a survey for validating the necessity of designing mobile based library information and service delivery systems. Responses to closed-ended questions in particular on 7-point Likert scales were analyzed using the descriptive analysis techniques of SPSS 20.0 and responses to other closed-ended questions were analyzed using general statistics.Findings The research indicates that users of academic libraries, especially students and faculty members, have a positive notion regarding designing and implementing a mobile based library information and service delivery system. It also reveals user opinions regarding the possible problems associated with the design and implementation of a mobile based library information and service delivery system.Originality The paper explores mobile based library information and service delivery systems for better and faster service provision to its potential users.

• Journal of Preventive Medicine and Public Health
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• 제46권sup1호
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• pp.3-11
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• 2013

Over the last two decades, significant research attention has been given to the acute effect of a single bout of exercise on postprandial lipaemia. A large body of evidence supports the notion that an acute bout of aerobic exercise can reduce postprandial triacylglycerol (TAG) concentrations. However, this effect is short-lived emphasising the important role of regular physical activity for lowering TAG concentrations through an active lifestyle. In 1995, the concept of accumulating physical activity was introduced in expert recommendations with the advice that activity can be performed in several short bouts throughout the day with a minimum duration of 10 minutes per activity bout. Although the concept of accumulation has been widely publicised, there is still limited scientific evidence to support it but several studies have investigated the effects of accumulated activity on health-related outcomes to support the recommendations in physical activity guidelines. One area, which is the focus of this review, is the effect of accumulating exercise on postprandial lipaemia. We propose that accumulating exercise will provide additional physical activity options for lowering postprandial TAG concentrations relevant to individuals with limited time or exercise capacity to engage in more structured forms of exercise, or longer bouts of physical activity. The benefits of accumulated physical activity might translate to a reduced risk of cardiovascular disease in the long-term.

• Journal of Information Science Theory and Practice
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• 제8권3호
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• pp.6-14
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• 2020

On information markets, we can identify different relations between sellers and their customers, with some users paying with money, some paying with attention, and others paying with their personal data. For the description of these different market relations, this article introduces the notion of arity into the scientific discussion. On unary information markets, customers pay with their money; examples include commercial information suppliers. Binary information markets are characterized by one market side paying with attention (e.g., on the search engine Google) or with personal data (e.g., on most social media services) and the other market side (mainly advertisers) paying with money. Our example of a ternary market is a social media market with the additional market side of influencers. If customers buy on unary markets, they know what to pay (in terms of money). If they pay with attention or with their personal data, they do not know what they have to pay exactly in the end. On n-ary markets (n greater than 1), laws should regulate company's abuse of money and-which is new-abuse of data streams with the aid of competition (or anti-trust) laws, and by modified data protection laws, which are guided by fair use of end users' attention and data.

• 대한수학교육학회지:수학교육학연구
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• 제9권1호
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• pp.351-367
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• 1999

This study aims to study the discourses influencing high school students' concept and attitude toward mathematics, and to examine how gender differences concerning mathematical aptitude are created. This study is based on the results of previous two studies which suggested that mathematical competence differs not only according to gender, region and school year, but also even within the same gender. For this study, 12 students ranking in the top 10% at two co-ed high schools were interviewed to find out 1) what discourses are related to gender and mathematics, 2) in what way these discourses are formulated and gain currency, and 3) how they have affected students in general. Common notions concerning mathematics may be summed up as follows: 1) Most of the students believe that gender difference in mathematical aptitude results because biologically men tend to be strong in mathematics and analytical skills while women tend to have better linguistic ability. This concept can help male students' studying to have a greater learning toward mathematics. 2) A large number of the students believe that male students' studying method is based on comprehension whereas female students' method is based on retention, and hence the former group tends to be better at applying their learning than the latter group. This notion seres to encourage male students and discourage female students from tackling difficult mathematical problems. 3) Many students believe that, although female students may surpass their male counterparts in middle school or the first year of high school, they will eventually fall behind by the 3rd year. Despite research which shows that these common beliefs are not grounded in scientific proof, high-school girls, who may be strong in mathematics, lose self-confidence and feel a sense of crisis. The mechanisms which produce and reinforce such concepts as those mentioned above can be summarized as follows: 1) Regarding the choice of majors and future career paths, parents show different attitudes toward sons and daughters, and this tends to influence high-school girls and hinders them from entering mathematics-related fields. 2) Teachers with value systems based on stereo-typed gender roles affect students a great deal, and give different advice according to gender of their students, for selecting their major fields - for instance, whether to study the natural sciences as opposed to humanities. 3) This study indicates that peer-group behavior, of either support or exclusion, also reinforces the process of internalizing notions of gender difference related to mathematical aptitude. 4) The gender-based notion that men are naturally more inclined to have better mathematical ability has caused male students to choose the natural science subjects and female students to turn to the humanities. The discourses discussed above, propagated in schools and homes, and in the mass media, are continually reinforced along with general gender inequalities in the society at large.

• 산업경영시스템학회지
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• 제22권51호
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• pp.175-187
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• 1999

The notion of productivity has been extended from the quantitative change of input factors to the efficiency change meaning efficient use of resources, and to the technical change meaning the qualitative improvement of input resources. In this way, the technical change is termed as total factor productivity in the individual businesses or the manufacturing industries. They should efficiently respond to the variations of economic environment and at the same time, have to make the efforts to improve productivity by increasing managerial efficiency and rasing the level of technology change for the continuous growth. Considering the growing importance of productivity, this study closely examines the factors influctuation on the productivity, fluctuation using total factor productivity in korean manufacturing industries. For the objective this study investigates the methods of measurement about total factor productivity, establishes the hypotheses based on the preceding research and finding. The results are obtained through the examination on the outcoms of regression analysis and related data. The results can be summarized as follows, First, in the progress of korean industrialization, the qualitative growth does not depend on the total factor productivity of the technical advance, and does not lead to the industry expansion. That is, the contribution of total factor productivity turns out to be relatively low. Second, it is necessary for the manufacturing industry to improve the level of technology and to emphasize the innovation of business, since the capital investment does not completely become fixed in the growth rate of productivity. Finally, continuous R&D investment should be made to increase total factor productivity. Namely, the regulation of industrial structure with an intensive technical development is essential and should be based on scientific and technical knowledge.

• 디자인학연구
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• 16호
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• pp.27-38
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• 1996

환경을 다루는 디자이너에게 있어서 유동적으로 변화하는 과학적 지식 체계의 흐름을 파악하는 것은 중요하다. 당대의 시대적 세계관과 타학문 분야의 발전 성향을 반영하여 새로운 문화를 창조하고 제시하는 과정이 환경디자인이기 때문이다. 본 연구는 변화하는 세계관이 관점에서 공간을 파악하여 현대인의 도시환경에 상실되어 가는 이미지를 회복할 수 있는 방향을 제시하는 데에 그 의의를 둔다. 연구의 진행 과정은 다음과 같다. 1. 공간의 순위적 질서에 따른 각 공간의 역할과 인간과의 관계에 있어서 각 공간의 중요성을 논한다. 2. 새로운 패러다임의 관점에서 공간은 어떻게 해석되는 지와 그에 따른 환경디자인 접근방법의 방향을 제시한다. 3. 도시 환경에 있어서 준공 적 공간의 제안이 뉴 패러다임과 그 입장을 같이 하고 있음을 논하고 준공 적 공간의 도시 활성화 역할의 중요성을 밝힌다. 연구결과 새로운 패러다임에 입각한 공간의 이해에서 출발한 준공적 공간이 도시에서의 풍요로운 삶의 영역을 확장하여 무질서, 엔트로피의 증가라는 부정적인 환경 문제를 극복하는 에너지로서 작용할 수 있는 가능성을 찾아볼 수 있었다.

• 한국과학교육학회지
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• 제34권7호
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• pp.677-691
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• 2014

과학의 본성(Nature of Science)에 대한 이해는 오랜 시간동안 과학교육학계의 가장 중요한 연구 주제중의 하나가 되어 왔다. 지난 20여년간 과학교육에서 과학의 본성이 가지는 중요성에 의해 다양한 연구가 진행되어 왔음에도 불구하고 실제로 현장에서 과학 활동을 하고 있는 과학자들이 어떻게 과학의 본성을 인식하고 있는지에 대한 연구는 거의 없었다(Taylor et al., 2008; Wong & Hudson, 2008; Bayir et al., 2014). 최근에 들어서 과학교육 연구자들은 과학교육에서 과학자들의 긍정적 영향과 참여의 중요성을 인식하면서 과학자들의 과학의 본성에 대한 개념을 알아야 할 필요성을 말하고 있다(Southerland et al., 2003; Taylor et al., 2008). 이와 같은 필요성을 바탕으로 본 연구는 과학교육계에서 널리 인식된 과학의 본성 주요 측면이 실제 현장에서 과학 활동을 하는 과학자들에 의해서는 어떻게 인식되고 있는지를 조사하기 위하여 미국에서 활동하고 있는 재미한국 과학기술자협회(KSEA: Korean-American Scientists and Engineers Association) 소속의 과학자들 35명의 과학의 본성에 대한 견해를 조사하였다. 과학자들의 과학의 본성에 대한 견해는 과학적 소양에 근거한 4가지 영역의 과학의 본성 틀(Lee, 2013)을 기반으로 개방형 질문을 통한 설문지 작성 형식으로 이루어졌으며 전체 참여 과학자들의 설문 후 지원한 4명의 과학자를 심층 면담하였다. 연구 결과는 과학자들은 대부분의 영역에서 과학 교육에서 제시된 과학의 본성과 일치되는 견해를 갖고 있었으나 몇 가지 영역에서는 상반되는 견해를 보이는 것으로 분석되었다. 구체적으로 우리나라 과학자들은 과학교육에서 제시된 다양한 과학의 본성 측면 중에서 과학지식의 잠정성 및 가변성, 과학의 다양한 사회적 영향, 과학의 한계성, 그리고 과학 활동의 협력성 등의 과학의 본성은 비교적 잘 이해하고 있었으나 반면 다양한 과학지식의 차이, 과학 탐구의 다양성, 그리고 상상력 및 창의력의 중요성에 대해서는 이해가 부족한 모습을 보여주었다. 4가지 영역의 과학의 본성측면으로는 1. 과학 지식에 대한 본성에서는 약 60% 이상의 설문 참여 과학자들이 과학적 이론이 더 많은 증거로 뒷받침되면 과학적 법칙이 될 수 있다고 말하였으며 2. 과학의 탐구적 본성에서는 약 60%이상의 과학자들이 과학의 탐구 방법을 몇 가지 단계를 거치는 실험과정에 국한하는 매우 제한된 과학의 본성을 보여 주었다. 또한 3. 과학적 사고의 본성에서는 약 50% 과학자들이 과학 활동에 있어서 상상력에 의존하지 않는다고 견해를 보여주었다. 그러나 대부분의 과학자들은 4. STS적인 과학의 본성(Theme IV) 측면에서는 과학교육에서 제시하는 과학의 본성 견해와 높은 일치률(약 90%)로 같은 견해를 갖고 있음을 보여 주고 있다. 이것은 과학자들이 현장에서 과학 활동만으로 철학적 반성을 통한 모든 과학의 본성을 이해하기는 어렵지만(Bayir et al., 2014) 사회 속에서 직업 활동으로써 체험한 STS적인 과학의 본성 측면은 내면화한 것으로 판단된다.

• 한국지구과학회지
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• 제24권6호
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• pp.524-532
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• 2003

이 연구의 목적은 진자 과제에서 학생들의 가설 생성에 있어서 귀추적 추론 능력이 중요한 역할을 한다는 가설을 검증하고자 하는 것이다. 가설을 검증하기 위하여 5학년 학생들을 대상으로 하여 진자 운동에 대한 가설 생성 검사와 진자의 길이에 대한 선지식 검사를 실시하였다. 진자의 길이에 대해 선지식을 가지고 있는 많은 학생들이 그네 과제에 대한 가설 생성에 선지식을 적용하지 못하였다. 이러한 결과는 학생들이 가설 생성에 실패한 이유가 단지 선지식이 없어서가 아니라 오히려 귀추적 추론 능력이 부족한 것과 관련된다. 학생들이 성공적으로 가설 생성을 하기 위해서는 선지식 뿐만 아니라 귀추적 추론능력도 요구된다. 그러므로 이 연구는 가설 생성 과정에 있어서 선지식 이외에도 귀추적 추론 능력이 중요한 역할을 한다는 주장을 지지한다. 이 연구는 학생들의 가설 생성 능력을 계발하기 위해서는 과학 교육에서 과학적 선언적 지식 뿐만 아니라 귀추적 추론 능력에 대한 교육도 함께 제공되어야 함을 시사한다.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 1999년도 춘계학술대회 및 발표대회 강연 및 발표논문 초록집
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• pp.5-5
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• 1999

The Principal deficiency of the existing notion about the sintering-mixtures consists in the fact that almost no attention is focused on the Phenomenon of alloy formation during sintering, its connection with dimensional changes of powder bodies, and no correct ideas on the driving force for the sintering process in the stage of establishing chemical equilibrium in a system are available as well. Another disadvantage of the classical sintering theory is an erroneous conception on the dissolution mechanism of solid in liquid. The two-particle model widely used in the literature to describe the sintering phenomenon in solid state disregards the nature of the neighbouring surrounding particles, the presence of pores between them, and the rise of so called arch effect. In this presentation, new basic scientific principles of the driving forces for the sintering process of a two-component powder body, of a diffusion mechanism of the interaction between solid and liquid phases, of stresses and deformation arising in the diffusion zone have been developed. The major driving force for sintering the mixture from components capable of forming solid solutions and intermetallic compounds is attributed to the alloy formation rather than the reduction of the free surface area until the chemical equilibrium is achieved in a system. The lecture considers a multiparticle model of the mixed powder-body and the nature of its volume changes during solid-state and liquid-phase sintering. It explains the discovered S-and V-type concentration dependencies of the change in the compact volume during solid-state sintering. It is supposed in the literature that the dissolution of solid in liquid is realised due to the removal of atoms from the surface of the solid phase into the melt and then their diffusicn transfer from the solid-liquid interface into the bulk of liquid. It has been shown in our experimental studies that the mechanism of the interaction between two components, one of them being liquid, consist in diffusion of the solvent atoms from the liquid into the solid phase until the concentration of solid solutions or an intermetallic compound in the surface layer enables them to pass into the liquid by means of melting. The lecture discusses peculimities of liquid phase formation in systems with intermediate compounds and the role of the liquid phase in bringing about the exothermic effect. At the frist stage of liquid phase sintering the diffusion of atoms from the melt into the solid causes the powder body to grow. At the second stage the diminution of particles in size as a result of their dissolution in the liquid draws their centres closer to each other and makes the compact to shrink Analytical equations were derived to describe quantitatively the porosity and volume changes of compacts as a result of alloy formation during liquid phase sinteIing. Selection criteria for an additive, its concentration and the temperature regime of sintering to control the density the structure of sintered alloys are given.