• Review of KIISC
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• v.24 no.3
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• pp.7-14
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• 2014

스마트 환경은, 사용자가 스마트기기를 통해 시간적, 공간적 제약을 받지 않고 스마트기기 서비스를 이용하는 것을 말하며 스마트기기의 보급으로 인하여 보편화되고 있다. 그런데 스마트 환경에서 서비스를 제공받기 위한 사용자와 스마트기기 간 인터페이스에서 각종 보안에 대한 위협이 발생한다. 또 스마트기기의 특성상 사용자 입력이 간편하지 않을 뿐만 아니라 일반 사용자가 계정 종류, 보안 유형 등 전문적인 용어에 대한 지식을 알아야하는 어려움이 존재한다. 최근 이러한 문제를 해결하고자 스마트기기의 터치스크린, 카메라, 가속도 센서, 지문인식 센서 등 다양한 센서를 혼합 사용하여 사용자 인증을 거치는 멀티모달 인터페이스 연구가 각광받고 있다. 따라서 본고에서는 인간과 스마트기기 사이 상호작용 시 안전하고 편리한 스마트 환경 조성을 위하여 멀티모달 센서를 활용한 다양한 스마트기기 사용자 인증 기술 동향에 대해 소개한다.

• Journal of The Korean Association For Science Education
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• v.28 no.1
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• pp.1-14
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• 2008

The image of science is one of the recurrent topics in science education research. In particular, we believe that students' images of Doing-Science-Well could be used for identifying not only students' perceived goals of science learning, but also practical guidelines of effective science teaching. In this study, the students' images of Doing-Science-Well were investigated with the following two research questions: (i) what are student's images of Doing-Science-Well?; (ii) in what contexts do students perceive that someone is doing science well? Thirty seven students in a high school in Seoul, Korea were asked to write their personal experiences by which they realized that someone was doing science well. The main results of the study are the following: Firstly, the images of Doing-Science-Well could be categorized into 'Einstein type', 'Socrates type', 'MacGyver type' and six more types. Secondly, with regard to contexts, students tended to realize that somebody is doing science well in terms of two kinds of contexts: 4 physical contexts and 6 psychological contexts. The findings led us to develop a frame of judging Doing-Science-Well, which combines the types and two kinds of contexts. The frame illustrates the multiplicity of the images of Doing-Science-Well.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06d
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• pp.255-258
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• 2008

현재 이동통신 네트워크는 통신 기술의 발전에 힘입어 음성 서비스를 넘어선 다양한 패킷 데이터 기반 서비스를 제공하고 있다. 하지만 현재 IEEE 802.11과 같은 이기종 네트워크에 대한 연구가 다양하게 진행되고 있는 것과 달리 이동통신 네트워크의 패킷 데이터 기반 서비스에 대한 연구는 이루어지지 않았다. 이러한 추세의 원인은 이동통신 네트워크가 사업자에 의해서 폐쇄적으로 운영되고 있기 때문이다. 우리는 지금까지 이기종 네트워크에 대한 연구를 바탕으로 예측만 하던 문제를 해결하기 위해 이 논문은 통해서 이동통신 네트워크의 패킷 기반 데이터 서비스의 특징을 분석한다. 실제 트래픽을 모두 분석하는 것은 규모의 문제로 불가능했기 때문에 우리는 서비스에 대한 과금 데이터를 사용했다. 과금 데이터에는 네트워크의 특징이 대부분 반영되어 있기 때문에 실제 트래픽을 수집해서 분석하는 것과 같다. 분석결 과로 이동통신 환경에서 사용자 행동 패턴과 서비스 유형별 트래픽 특성 및 네트워크의 특징을 보여준다. 이러한 결과는 향후 네트워크 진화에 의해서 예상되는 트래픽 예측 및 관리에 활용 가능하고, 네트 워크 모델링에 있어서의 기반 지식을 제공한다.

• The Journal of Information Technology
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• v.6 no.4
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• pp.93-111
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• 2003

Enterprise portal(EP) is the emerging service and technologies in recent business area. We divided the three subportal of EP - IPP(Information Processing Porta), DPP(Decisino Processing Portal) and EKP(Enterprise Knowledge Portal). IPP include the information processing area that conduct the general business field. DPP is the area that can support the employee's decision processing and making according to their roles. The function of EKP assist the tacit knowledge management and the collaboration job among knowledge workers. If we efficiently integrate and aggregate their subportal, our business information system can achieve more efficient and effective business performance. Also we can anticipate this model that serve the system environment, supporting the user friendly circumstance, enforcing e-business activity, connecting between customer and supplier, positioning more competitive advantage.

• Archives of design research
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• v.14
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• pp.245-254
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• 1996

Form and function are not only the most important factors that tell the very essence of design morphology but also the fundamental factors that determine the existence of things. Th -erefore, approaching to the problems of them and the following practical morphological creation are the final goal of solving all the problems of design. Comparing with such importance and significance of the morphology, however there has been no conscious study nor logical achievement but only partial consideration about them. From this viewpoint, the substantial meanings, the intrinsic attributes and the typical patterns of them are inquired systematically and the whole through this study. Also their relations are identified with some appropriate views. As a result of this study, new knowledge base will be cons -tructed, and it will contribute to developing new morphological thinking and method which are especially strengthened these days.

• Journal of Engineering Education Research
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• v.11 no.2
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• pp.90-101
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• 2008

This study was conducted to develop pre-engineering educational program model based on STEM integration approach. To accomplish this purpose literature review and content validity ratio survey were carried out. The main results of this study were as follows: First, the conceptual model of STEM integration approach was constituted. Second, the conceptual model of pre-engineering educational program model based on STEM integration approach was proposed. Third, the formation steps of inquiry project activity, problem solving activity, and creative engineering design activity were developed to structure the educational program.

• School Mathematics
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• v.11 no.3
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• pp.479-496
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• 2009

Some children can construct a basic concept of addition and subtraction during the preschool years. Children start to experience mathematics via numbers and their of operations and contact with various contexts of addition and subtraction. In special, word problems reflect mathematics which is appliable to real life. In this paper, I analyse the types of word problems in text book and its students' responses. First, I analyse the types of addition word problems which consist of change add-into situations and part-part-whole situations. Second, I analyse the types of subtraction word problems which consist of change take-away situations, compare situations and equalize situations. Third, I analyse the students' responses by the types of word problems in addition and subtraction. And 115 2nd grade elementary school students participated in this survey. The following results have been drawn from this study. First, the proposition of word problems of part-part-whole situations is higher than that of change add-into situations and the proposition of word problems of take-away situations is higher than that of compare situations and equalize situations. According to the analysis about students' responses, It is no difference between change add-into situations and part-part-whole situations. But the proposition of word problems of take-away situations is higher than that of compare situations and equalize situations. This results from word problems which contain unnecessary information in problem. So, we have to present the various word problems to students.

• Journal of Engineering Education Research
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• v.10 no.3
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• pp.5-20
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• 2007

This study was carried out to analyze the design pattern on engineering design curriculum P University based on the curriculum design model. For this study, the relation model between organizational factors by Drake & Burns(2004) and university curriculum design pattern Toohey(1999) were used as a frame of the analysis. From the analysis, we confirmed following results. Firstly, the relation between the subjects in the engineering design curriculum was designed to acquire the knowledges of facts, topics, and concepts and then to improve low-level skills, broad-range skills, and high-level skills related to engineering design sequently. Secondly, the design pattern of the engineering design curriculum analyzed in this paper is project and problem based structure. This result will be useful for reviewing and improving the relation between engineering design curriculum.

• Journal of Educational Research in Mathematics
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• v.19 no.1
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• pp.45-61
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• 2009

The powerful role of analogical reasoning in discovering mathematics is well substantiated in the history of mathematics. Mathematically gifted students, thus, are encouraged to learn via in-depth exploration on their own based on analogical reasoning. In this study, 57 gifted students (31in the 7th and 26 8th grade) were asked to formulate or clarify analogy. Students produced fruitful constructs led by analogical reasoning. Participants in this study appeared to experience the deep thinking that is necessary to solve problems made with analogies, a process equivalent to the one that mathematicians undertake. The subjects had to reflect on prior knowledge and develop new concepts such as an orthogonal projection and a point of intersection of perpendicular lines based on analogical reasoning. All subjects were found adept at making meaningful analogues of a triangle since they all made use of meta-cognition when searching relations for analogies. In the future, methodologies including the development of tasks and teaching settings, measures to evaluate the depth of mathematic exploration through analogy, and research on how to promote education related to analogy for gifted students will enhance gifted student mathematics education.

• Journal of Elementary Mathematics Education in Korea
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• v.19 no.3
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• pp.435-455
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• 2015

This study is aimed at analyzing the level change and features of mathematical communication in elementary students' expository writing. 20 students of 5th graders of elementary school in Seoul were given expository writing activity for 14 lessons and their worksheets was analyzed through four categories; the accuracy of the mathematical language, logicality of process and results, specificity of content, achieving the reader-oriented. This study reached the following results. First, The level of expository writing about concepts and principles was gradually improved. But the level of expository writing about problem solving process is not same. Middle class level was lower than early class, and showed a high variation in end class again. Second, features of mathematical communication in expository writing were solidity of knowledge through a mathematical language, elaboration of logic based on the writing, value of the thinking process to reach a result, the clarification of the content to deliver himself and the reader. Therefore, this study has obtained the conclusion that expository writing is worth keeping the students' thinking process and can improve the mathematical communication skills.