• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.227-230
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• 2007

If we use the microwave of SAR, we can observe on the ocean in spite of bad weather, day and night time. Sea surface images on the ocean of SAR have a lot of information on the atmospheric phenomena related to surface wind vector. Information of wind speed which is extracted from SAR images is used variously. Wind direction data and sigma nought value are put in the CMOD which can extract wind information in order to estimate sea surface wind from SAR images. Wind spectrum which is extracted from SAR always presents opposed two points of $180^{\circ}$ because of applying to 2D-FFT. These ambiguities should be decided by position of land, wind direction or numerical model. Previously, we converted into sigma nought after extracting Digital Number from RadarSat-1 SAR using ENVI4.0, thus, it took a long time because every process was manual. Therefore, we converted sigma nought by matlab code after making matlab code. After that, we are extracting wind direction from sigma nought. Now, to decide wind direction needs further study because wind direction has $180^{\circ}$ ambiguity.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3354-3362
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• 2009

Recently, the potential of advanced studies is being highlighted that the networking activity of entrepreneurs of venture businesses influences successful foundation. Given this background, this study intends to make an exploratory study on the influence of self-efficacy of the entrepreneur's cognitive characteristic and patience with ambiguity of the psychological characteristic upon networking activity, and the components of networking activity upon entrepreneurial performance. It was tested with sample of responses to the questionnaires for 156 entrepreneurs of venture businesses which are under 3 years since they were founded. Findings of this study are as follows: First, the entrepreneur's self-efficacy was shown to have a significant effect on networking and entrepreneurial performance. Second, patience with ambiguity was shown not to have a significant effect on networking and entrepreneurial performance. Third, networking was shown to have an effect on entrepreneurial performance, and among the components of networking activity, network frequency and reliability were shown to significantly influence entrepreneurial performance, while network range was shown not to have a significant effect on it. Therefore, for performance improvement of start-up enterprises, rather self-efficacy of the entrepreneur's cognitive characteristic than the psychological characteristic seems more important. Also, with a practical suggestion that for the networking activity of entrepreneurs of venture businesses, network frequency and reliability may have a more critical effect rather on entrepreneurial performance than network range, the limitation and direction of this study are presented.

• Journal of KIISE:Computer Systems and Theory
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• v.35 no.3
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• pp.141-149
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• 2008

Most functional programming languages allows programmers to write ambiguous rules, under the strategy that pattern-matching will be performed in a direction of 'from top to bottom' way. While providing programmers with convenience and intuitive understanding of defining default rules, such ambiguous rules may make the semantics of functional languages unclear. More specifically, it may fail to apply the equational reasoning, one of most significant advantage of functional programming, and may cause to obscure finding a formal way of translating functional languages into the ${\lambda}$-calculus; as a result, we only get an ad hoc translation. In this paper, we associate with separability of term rewriting systems, holding purely-declarative property, pattern-matching semantics of lazy functional languages. Separability can serve a formalism for translating lazy functional languages into the ${\lambda}$-calculus.

• The Journal of the Korea Contents Association
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• v.14 no.7
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• pp.386-394
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• 2014

Entertainment Industry, with high productivity of added value, is noticed as a major industry leading global economy. Thus the government has been constantly attempting to devise various plans for developing entertainment industry, but the plans are mostly come out according to currently faced issues rather than considering the whole industry interior interaction. We are mainly objective to find a ground for estimating the current entertainment industry status. For this, we borrowed the concept of 'maturity' from various capacity maturity estimation tools. We also analyzed Korean film industry as a representative entertainment industry case to find what and how government intervention has affected on the industry.

• Journal of the Korean Institute of Landscape Architecture
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• v.43 no.2
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• pp.87-104
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• 2015

As the influence of Landscape Urbanism has grown, various criticisms on the discourse also have increased. A study on critical opinions of Landscape Urbanism is necessary to fully comprehend the theoretical structure of the discourse and its limitations. This study introduced the concept of Intension and Extension, which is used in the field of Logics and Semiotic, as an analytical tool to interpret various criticisms based on different views in a more objective and synthetic way. After examining the development of criticisms of Landscape Urbanism, 30 texts with important critiques on the theory were selected and analyzed. Criticisms can be classified as internal criticism and external criticism according to specific topics they are engaged with. The study only covers internal criticism as a research scope. The internal criticisms on Landscape Urbanism are re-categorized into topics of theory, practice and the relation between theory and practice. Vagueness of concepts and error in concepts are two types criticism related to the issue of theory. Lexical Ambiguity and Intensional Vagueness are the main causes of conceptual vagueness in Landscape Urbanism. Conceptual vagueness related with the problem of redefining an existing concept through expanding its meaning reveals a structural dilemma. There are three types of criticism included in the topic of practice: absence of practical results, form-oriented practice, and ambiguous identity in practical results. Ambiguous identity is caused by Extensional Vagueness allowing borderline cases. Because these borderline cases overlap with extensions of landscape architecture, it is hard to differentiate projects of Landscape Urbanism and those of conventional landscape architecture. Most criticisms on the relation between theory and practice raise the question on the practical method. Two types of criticism are engaged with the topic of the practical method: errors in practical methods and absence of practical methods. The absence of practical methods is a fundamental problem of Landscape Urbanism which is hard to solve by the proposed solutions. However, these structural problems are not only the weak point but also the factor that is able to prove the potentials expand the scope of Landscape Urbanism. In addition to the results of the study, internal criticisms on Landscape Urbanism should be examined in the following studies in order to predict the next direction of Landscape Urbanism.

• Journal of Broadcast Engineering
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• v.26 no.1
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• pp.70-78
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• 2021

Estimating 3D information from a single image is one of the essential problems in numerous applications. Since a 2D image inherently might originate from an infinite number of different 3D scenes, thus 3D reconstruction from a single image is notoriously challenging. This challenge has been overcame by the advent of recent deep convolutional neural networks (CNNs), by modeling the mapping function between 2D image and 3D information. However, to train such deep CNNs, a massive training data is demanded, but such data is difficult to achieve or even impossible to build. Recent trends thus aim to present deep learning techniques that can be trained in a weakly-supervised manner, with a meta-data without relying on the ground-truth depth data. In this article, we introduce recent developments of weakly-supervised deep learning technique, especially categorized as scene 3D reconstruction and object 3D reconstruction, and discuss limitations and further directions.

• Korean Journal of Comparative Education
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• v.27 no.3
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• pp.101-127
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• 2017

The purpose of this study is to analyze how the debates on learning and learning outcomes in global education agendas have changed and to understand the discourses and issues about learning under the agendas, and finally based on the understanding, to know what is the implication we should take in international education development cooperation in Korea. To do this, this study critically analyzed 1) what is the main features and directions, and 2) the method and limitation in handling learning concept on three major global education forums which are Jomtien global education forum in 1990, Dakar in 2000, and Incheon in 2015. Major finding shows that there are little learning concept discussed in Jomtien and Dakar forums and in SDGs education agenda, learning is vaguely defined and discussed and there are problems of too much focus on learning outcomes itself and absence of study on proper assessment system. Major lessons and implications for international education development cooperation could be stated that postcolonial perspectives and learner centered approaches is required in developing countries's education ecology. And continuous support for sustainable development for learners' capacity should be underlined. We needs to focus on developing software not hardware from the first of educational ODA. Finally, it is needed to embed within pedagogical approaches.

• Electronics and Telecommunications Trends
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• v.23 no.2 s.110
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• pp.34-45
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• 2008

현재 디지털 컨버전스에 따른 통신방송융합, 유무선 통합으로 다수의 새로운 서비스들이 출현하는 등 통신시장의 환경이 급변하고 있다. 새로운 역무의 출현으로 통신시장의 경계가 모호해지고 이해관계자들이 복잡한 관계를 가지고 등장하고 있다. 이러한 환경 하에서 합리적인 경쟁정책을 위해서는 무엇보다도 융합 환경을 고려한 시장획정이 선행적으로 이루어져야 하며, 이를 통한 해당시장의 경쟁상황에 대한 정확한 파악을 기반으로 해야 할 것이다. 본 고에서는 통신서비스 분야의 합리적 시장획정을 위해 해외 주요국의 사례를 분석하고 이를 통해 디지털 컨버전스 환경을 고려한 바람직한 시장획정 방안을 제시하고자 하였다. 결론적으로 융합환경 하에서 효과적인 경쟁정책을 위해서는 합리적인 경쟁상황평가 실시가 요구되며, 이러한 경쟁상황평가의 실시는 정확한 시장상황 판단에 입각한 시장획정에 기초하여야 한다. 시장획정을 함에 있어서 먼저 융합환경을 고려하고 명확한 경제 분석을 통하여 이루어져야 하며, 변화되는 경쟁상황을 보다 효과적으로 파악하기 위하여 주기적으로 그리고 유연하게 시장리뷰가 이루어져야 한다. 시장리뷰에 있어서 투명성과 예측가능성의 확보는 경쟁정책의 실효성을 보다 높일 수 있을 것이다.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.11a
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• pp.262-265
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• 2000

영상에서의 경계선추출은 영상의 강도의 변화를 이용한 경계영역의 가시화 기법이므로 gray level 영상이 가지는 강도를 이용하여 에지를 찾을 수 있다. 뇌 영상에는 MRI 영상과 같이 해부학적인 정보가 큰 영상과, PET 영상같이 perfusion으로 분석해야 할 영상이 있는데 그 경계가 뚜렷한 MRI 영상과 달리 PET 뇌 영상은 영상의 특성상 경계영역의 구분이 모호한 실정이다. 본 논문에서는 이러한 영상의 특성에 따라 뇌 영상에서 영상 강도에 대해 등분할을 한 후 vectorgram에서 magnitude의 영역을 선택하여 영상을 분할 하였다. 그리고 PET 와 MRI영상과 현미경 영상에 대한 결과를 비교하였다. Vertcrgram은 에지정보를 가지는 영상에 대해 벡터요소를 그래프화 한 것으로 방향성에 대한 평가를 통해 영역 분할을 하였다. 이러한 PET 영상의 2차원 분할 방법은 3차원 PET 영상 분석에 응용될 수 있을 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06b
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• pp.74-79
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• 2007

고객이 요구한 제품은 테스트에 따라 그의 품질을 보장할 수 있기 때문에 테스트에 대한 관심과 중요성이 커지고 있는 만큼 테스트에 소요되는 비용 또한 실제 개발에 소요되는 비용에서 큰 비중을 차지하고 있고 그 중요성 또한 강조되고 있다. 하지만 실제 국내의 소프트웨어 개발 현실을 살펴 보면 제품의 개발 기한을 보장하기 위해서 테스트를 간과 함으로써 예상치 못하게 고객이 요구하는 제품의 품질을 만족시키지 못하고 있다. 또한 이러한 테스트 활동을 통한 품질 보장 활동의 필요성을 인정하지만 현재 개발 프로세스의 문제점 파악 혹은 개선 방향에 대해서 모호한 비전을 가지고 활동하기 때문에 성과가 미비하기도 하다. 본 논문에서는 국방 소프트웨어의 소프트웨어 개발 활동 내에서의 테스트 활동 및 제품의 품질에 대한 문제점을 지적하고 Cost of Quality (CoQ) 모델을 통해서 문제점을 분석함으로써 고 품질의 제품을 개발하기 위한 테스트 프로세스 개선에 대한 동기 부여 및 개선 방안을 제시하고자 한다.