• Proceedings of the KAIS Fall Conference
• /
• 2009.12a
• /
• pp.3-7
• /
• 2009

본 논문에서는 IT 벤처 창업 기업이 창업 초기 단계를 지나 성공적으로 성장 단계에 진입 할 수 있는 성공 요인에 대해, 사례 연구에 의한 탐색 연구를 통하여 어떤 요인들이 실증적으로 존재하며 이들의 특질이 어떠하고, 이 특질들이 창업기의 벤처 기업에 어떠한 영향을 미치게 되는지에 고찰해 보고자 한다. 또한 IT 벤처 기업의 창업 성공 요인으로서 고찰해 보는 여러 특질들의 유형을 분석하여 이들을 창업자와 창업팀 등의 내부적인 요소와 관련된 부분들과 외부적 요소와 관련된 부분들 그리고 성장 단계의 특질과 관련된 요소들로 분류하고 이 요소들 중 초기 단계의 연구개발 기업의 경우 성공적인 창업단계에 이를 수 있는 주요한 요소들의 특성과 성공적인 창업 단계로의 발전과의 상관, 인과 관계를 연구, 고찰해 보며 주요한 요소들 각각의 상관관계를 연구하여 이를 토대로 초기 단계의 연구 개발 창업 기업에 있어서 성공적인 창업 단계로의 발전에 대한 주요 성공 요인을 해외에서의 창업 성공 요인에 대한 비교 연구와 국내의 사례에 대한 연구를 통하여 고찰하여보고자 한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2000.10b
• /
• pp.931-934
• /
• 2000

움직임 추정 및 보상을 위한 방법 중 가장 많이 사용하는 블록 정합 방법은 어떤 평가 함수와 탐색방법(Search Procedure)을 사용했느냐에 따라 그 성능이 달라지게 된다. 본 논문에서는 평가 함수로써 평균 제곱 오차(Mean Squared Error; MSE), 평균 절대값 오차(Mean Absolute Error; MAE), 화소 차분류(Pel Difference Classification: PDC)을, 탐색 방법으로써 전체 탐색 방법(Full Search Method : FSM), 3단계 탐색 방법(Three Step Search : TSS), 대각 탐색 방법(Cross Search Algorithm ;CSA)을 사용하여 이들의 성능을 각각 비교 분석하여 봄으로써 블록 정합 방법을 이용한 움직임 추정에 대한 전반적인 이해를 도모하고자 한다.

• Journal of Engineering Education Research
• /
• v.8 no.1
• /
• pp.99-112
• /
• 2005

Problem-Based Learning is focused, experiential learning organized around the investigation and resolution of messy, real-world problem. It is both a curriculum organizer and instructional strategy, two complementary processes. The PBL model developed in this study was composed the two components of Problem Design(curriculum organizer) and Problem Implementation(instructional strategy). The basic process of Problem Implementation Model were composed the 8 steps ; 1) the identification of problem, 2) the specification of problem, 3) the exploration and generation for solution, 4) the selecting of best idea, 5) the specific planning of best idea, 6) the implementation and realization, 7) the evaluation, 8) the applying and reflection.

• Journal of the Korean Geographical Society
• /
• v.43 no.3
• /
• pp.392-411
• /
• 2008

The purpose of this paper is to develop a method for exploring hotspot patterns of house price volatility where there is a high fluctuation in price and homogeneity of direction of price volatility. These patterns are formed when the majority of householders in an area show an adaptive tendency in their decision making. This paper suggests a method that consists of two analytical parts. The first part uses spatial scan statistics to detect spatial clusters of houses with a positive range of price volatility. The second part utilizes local Moran's I to evaluate the homogeneity of direction of price volatility within each cluster. The method is applied to the areas of Gangnam-Gu, Seocho-Gu, and Songpa-Gu in Seoul from August to November of 2003; the Participatory Government of Korea designated these areas and this period as the most speculative. The results of the analysis show that the area around Gaepo-Dong was as a hotspot before the Government's anti-speculative 10.29 policy in 2003; the house prices in the same area stabilized in October, 2003 and the area was identified as a coldspot in December, 2003. This case study shows that the suggested method enables exploration of hotspot of house price volatility at micro spatial scales which had not been detected by visual analysis.

• Communications for Statistical Applications and Methods
• /
• v.3 no.3
• /
• pp.11-23
• /
• 1996

본 연구에서는 선형회귀분석에서 Hadi와 Simonoff의 다중이상점 식별방법을 수정하여 새로운 알고리즘을 제시하였다. Hadi와 Simonoff의 알고리즘 첫 단계에서 이상점일 가능성이 없는 점들의 집합을 추출할 때 가장효과와 편승효과에 영향을 받을 수 있음으로, 이 첫 단계를 수정하였다. 우리는 잔차가 일정한 분산을 갖는 정규분포에 다르다는 가정하에서 잔차의 신뢰구간을 생각하고, 이 구간안에서 잔차의 MAD가 최소인 새로운 모형을 탐색하고, 이를 이상점일 가능성이 없는 점들의 집합을 추출하는데 일용하는 새로운 알로리즘을 제시하였다. 제시된 방법은 실제자료에서 다른 방법에 비해 효율적으로 이상점을 식별할 수 있었다.

• Journal of The Korean Association For Science Education
• /
• v.32 no.1
• /
• pp.129-145
• /
• 2012

This study investigated factors of creativity and interaction between factors that are revealed when gifted students designed scientific experiments. For this, we firstly developed items which required the written process of designing experiments to explore creativity factors. Then, we used these items as a part for letters of self-introduction to students who applied for 2011 correspondence education of general physics for the Korea Physics Olympiad. 513th letters of self-introduction which were analyzed to investigate factors of creativity in view of creativity definition after researchers' consultation, which specifically means a combination of divergent and convergent thinking. The results were as follows; (1) in the step of hypothesis building, we could not only find Originality and the Flexibility & Fluency, which were factors of divergent thinking, but also Coherency and Elaborateness, which were factors of convergent thinking. (2) in the step of the hypothesis testing, we could explore Originality, Flexibility & Fluency in divergent thinking and Coherency, Reliability, Clarity, Elaborateness in convergent thinking. (3) we also figured out three creativity types of gifted students from the viewpoint that creativity is a consequence of interaction between divergent thinking and convergent thinking; a) Type A showed divergent and convergent factors of creativity in the step of hypothesis building. However, type A did not include divergent factors of creativity on the process of the hypothesis testing. b) Type B had divergent and convergent factors of creativity on the process of the hypothesis testing, but it had not convergent factors of creativity on the step of hypothesis building. c) Finally, in Type C, only divergent factors of creativity appeared on the process of the hypothesis testing, but convergent factors of creativity could be found on the step of hypothesis building and hypothesis testing.

• Journal of The Korean Association of Information Education
• /
• v.21 no.4
• /
• pp.451-462
• /
• 2017

This study selected 3D printing that is highly likely to be adopted in schools. This research was conducted in two stages: 1) proposing the learning activity framework for utilizing 3D printing in education, and 2) exploring the potential of integrating 3D printing in the school field. The '3D printing learning activity framework' proposed in this study includes four phases that are categorized according to the complexity of problem-solving processes and collaborative interaction: Step 1 as production through replication, Phase 2 as means of imaginary expression, Phase 3 as near problem-solving, and Phase 4 as expanded problem-solving. Next, we conducted the field study with 23 students in the 6th grade math class where they learned the various solid shapes and volumes through 3D printing-integrated activities. The lesson was considered as Phase 1, which is the production through replication. Overall, the results showed that the participants had positive perceptions about the efficacy of 3D printing activities, the quality of learning experience, and satisfaction. On the other hand, it was found that the usability of 3D printers and CAD program needs further improvement The contribution of this study can be found in the learning activity framework that can guide 3D printing activity design in school, and in the exploration of enhancing the connection between 3D printing activities and curricular relevance beyond simple interest toward a novel technology.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.46 no.3
• /
• pp.18-27
• /
• 2009

In this paper, we propose a frame rate conversion algorithm using adaptive search-based motion estimation (ME). The proposed ME method uses recursive search, 3-step search, and single predicted search as candidates for search strategy. The best method among the three candidates is adaptively selected on a block basis according to the predicted motion type. The adaptation of the search method improves the accuracy of the estimated motion vectors while curbing the increase of computational load. To support the proposed ME method, an entire image is divided into three regions with different motion types. Experimental results show that the proposed FRC method achieves better image quality than existing algorithms in both subjective and objective measures.

• Journal of Science Education
• /
• v.39 no.1
• /
• pp.99-112
• /
• 2015

This study aimed at investigating elementary teachers' stages of concerns and its changes about STEAM education. The participants of this study were 90 elementary school teachers implementing STEAM education in their schools. The Stages of Concern Questionnaire (SoCQ) was administered after the permission was granted by Hall. Data were collected three times from April, June, and December in the year of implementing the exemplary STEAM school. The results indicated that elementary school teachers' concerns toward STEAM education, the differences of the percentile scores of each stages of concerns, showed slightly low. The SoC of teachers in April showed that Awareness(Stage 0) was relatively very high and Consequences(Stage 4) was very low. However, in December, both Awareness(Stage 0) and Management(Stage 3) were very low. In particular, the percentile scores of Consequence(Stage 4) showed the big difference from 54.7 to 74.3. In addition, teachers who took science track in their high schools showed the relatively low score in the stage of Management(Stage 3). Teachers having the degree of Master of Arts presented the relatively low percentile score in the stage of Management(Stage 3). Teachers who majored in STEM related areas at the university presented the relatively low score in the stage of Management(Stage 3). The findings of this exploratory study may provide the useful insights into the integrative approaches of STEAM education.

• Journal of KIISE:Computer Systems and Theory
• /
• v.26 no.4
• /
• pp.513-526
• /
• 1999

3 차원 입체 형상을 표현하기 위한 수단으로서 도면을 사용하는 방법이 생산현장에서 많이 활용되고 있다. 그러나 이 방법은 정투영 과정에서 정보 손실이 발생하기 때문에 3차원 후보 요소의 빈번한 조합 탐색 및 복잡한 기하 연산을 필요로 한다. 특히 , 이면도로부터 복원과정은 면도의 생략으로 인하여 수많은 허요소를 생성한다. 본 논문은 효율적인 허요소 축소를 통하여 이면도로부터 다면체를 바르게 복원하는 이단계 알고리즘을 제안한다. 1 단계에서는 이면도와의 정합성에 필수적인 최소한의 3차원 후보요소를 생성한후 , 정투영시 이면도와 일치하는 부분 물체를 복원한다. 2단계에서는 부분 물체에 직교면을 덧붙임으로써 기하학적으로 타당한 완전 물체를 복원한다. 실험결과를 통하여 제안방법이 기존 방법들에 비해 적은 수의 3차원 후보 요소를 생성시키면서 이면도로로부터 3차원 물체를 빠르게 생성하는 것을 보인다.