• The Bulletin of The Korean Astronomical Society
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• v.36 no.1
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• pp.65.2-65.2
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• 2011

천체관측에서 가장 중요한 요소인 초점은 관측된 영상의 활용가치를 좌우하게 된다. 관측자가 직접 관측하는 망원경의 경우 직접적인 확인을 통하여 초점을 맞추어 관측하지만, 관측자가 개입하지 않는 자동관측 망원경의 경우 초점을 맞추는 일은 생각처럼 쉬운 일이 아니다. 자동으로 초점을 맞추기 위하여 기본적으로 활용되는 변수는 FWHM(Full with Half Maximum)이며, 초점이 전혀 맞지 않는 영상의 경우 FWHM을 결정할 수 없으며, 자동관측 망원경의 경우 관측된 영상을 전부 사용할 수 없게 된다. 본 연구에서는 초점이 전혀 맞지 않는 경우에도 초점을 맞출 수 있도록 FWHM을 활용하지 않고 별상의 크기를 직접 계산하여 좋은 초점을 맞출 수 있는 프로그램을 개발하였으며, 새로 개발한 프로그램은 결과 도출시간이 빠르고 광축이 맞지 않은 영상에서도 활용할 수 있어 활용성을 극대화 하였다. 한편, 리눅스 및 윈도우 기반의 영상 관측 컴퓨터에서도 활용할 수 있어 앞으로 활용성이 더 많아 질 것으로 기대한다.

• Proceedings of the Korean Society for Language and Information Conference
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• 2002.06a
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• pp.153-161
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• 2002

본 논문에서는 주제와 초점이 한가지 기준에 의해 분류될 수 있는 것을 보이고자 한다. 이를 위해서 Rooth의 대안 의미론의 요점인 대안 집합이 어떤 방식으로 결정되고 그 대안 집합의 크기가 얼마가 되느냐에 따라서 여러 가지 주제와 초점이 분류되었다 또한 정보초점에 나타나는 초점의 한정성은 초점자체의 본성이라기보다는 이전 발화의 전제에 의한 상호작용의 결과라는 것을 보였고, 대조 초점과 대조주제의 구분을 위하여 대화함축이 일어나는지 여부를 기준으로 이 두 개념을 구분하려고 하였다.

• Annual Conference on Human and Language Technology
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• 2007.10a
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• pp.54-61
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• 2007

양화문 안의 강 양화사와 약 양화사가 전제적/비전제적 해석과 관련된 영향권 다툼의 과정에서도 약 양화사가 주어이든 목적어이든지 표면 형태에서 VP로부터 멀리 떨어져 있는 경우에는 전제적 해석만을 받게 되어 양화문에 중의성이 발생하지 않는다. 그런데 타동사의 목적어나 비대격 주어 등의 약 양화사가 초점에 민감한 경우에 비전제적 해석이 가능하게 되어 중의적인 문장이 될 수 있다고 본다. 표면구조상 VP 밖에 위치한 약 양화사라도 초점화 되면, 초점투사를 통하여 논리 형태에서 형성된 초점의 영향권(초점 구문) 안에 들어있게 되며, 이때의 초점이 가지는 영향권은 핵 영향권과 일치한다. 즉, 초점은 안에 있는 약 양화사가 핵 영향권 안에서 비전제적으로 해석되도록 하는 동력으로 작용한다고 볼 수 있다.

• Journal of the Korea Society of Computer and Information
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• v.12 no.5
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• pp.11-18
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• 2007

In this paper, we propose a discriminative color quantization algorithm depending on the degree of focus of the regions. When we take pictures, we usually focus the object that we want to emphasize. This means that focused area on the photograph contains important information. If the focused area is displayed with more colors, we can express the important information in more detail. This paper proposes a color quantization method that determines the focused area and assigns more colors for the area.

• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.607-622
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• 2018

In this study, we investigated path that influence task performance through mediation of leader identification, regulatory focus (promotion focus and prevention focus). The results of this study are summarized as follows. First, ethical leadership has a positive effect on leader identification. Second, leader identification has played a crucial role in the relationship between ethical leadership and regulatory focus, and regulatory focus also have an important mediating effect on the relationship between leader identification and task performance. These results show that leader identification, regulatory focus play as an important mediator in relationship between ethical leadership and task performance.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.5
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• pp.235-249
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• 2004

This paper proposes a method for estimating isotropic out-of-focus blur and a fully digital auto-focusing based on a priori estimate set of PSFs. The proposed algorithm for identifying the isotropic PSF is performed by approximating an isotropic blur to a novel discrete PSF model and estimating the PSF model coefficients from degraded edges. After acquiring the set of PSFs by proposed PSF estimation algorithm the proposed fully digital auto-focusing system can restore out-of-focused images by two steps: i) selecting an optimal PSF and ii) restoring the out-of-focused image by digital image restoration.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.10B
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• pp.1117-1123
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• 2009

Head fixed type multi-focus display system using Galvano-scanner and DMD(Digital Micro-mirror Device), which is able to perfectly accommodate, can solve eye fatigue due to conflict between convergence eye movement and accommodation action in stereoscopic display. This system is able to accommodate through making convergence point about each view point and offering it in front of observer's pupil by using laser scanning method. In this paper, we analyzed laser scanning method of this multi-focus display system. And multi-focus display system based on this analysis was made, which showed that focus adjustment was possible through video camera. As a result, formation principle of view point of multi-focus system by laser scanning method was verified.

• The Korean Journal of Nuclear Medicine Technology
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• v.18 no.1
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• pp.104-109
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• 2014

Purpose: Conventional pinhole scintigraphy offers a high resolution and generally use for thyroid scan or bone scintigraphy. the aim of this study is to evaluate performance of each aperture according to the diameter size. Materials and Methods: In this study 2 mm, 4 mm, 6 mm, 8 mm diameter pinhole collimators were mounted on Siemens E.CAM systems. In order to evaluate performance evaluation of each aperture, we acquired projection image by using SPECT for evaluating FWHM, resolution test and static image for evaluating thyroid phantom test. Results: As a result of FWHM showed 2.2 mm FWHM, 3.2 mm FWHM, 5.4 mm FWHM, 7.5 mm FWHM per each aperture in the resolution test. SNR, uniformity, contrast were acquired result from thyroid phantom test comparing general image and delayed image. as a result of SNR showed 6.55, 8.47, 6.2, 5.23 in case of general image and 5.25, 5.01, 5.38, 5.82 in case of delayed image per each aperture. as a result of uniformity showed 0.152, 0.118, 0.161, 0.19 in case of general image and 0.19, 0.199, 0.185, 0.171 in case of delayed image per each aperture. as a result of contrast showed 1.31, 1.19, 1.15, 1.01 in case of general image and 1.09, 1.08, 1.04, 1 in case of delayed image per each aperture. Conclusion: Resolution and sensitivity were heavily influenced by aperture size. and also we found advantage of delayed image as a result of thyroid phantom test.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.2
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• pp.1-8
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• 2016

Self Regulatory Focus Theory explained two different self-regulatory systems(promotion focus and prevention focus) to achieve a goal. According to this theory, people have different type of goal(approach pleasure and avoid pain) and use different type of strategy to achieve the goal. Promotion focus targets their attention to positive outcomes and the achievement of gains. On the other hand, prevention focus targets attention more to negative outcomes and the avoidance of losses. Also, promotion focus tends to use approach and eager strategy to achieve the goal and prevention focus tends to use avoidance and vigilant strategy. This study examined the effects of self regulation focus on attitude and intention toward business start-up. We proposed that promotion focused people will respond more positively to the attitude and intention toward business start-up than prevention focused people. This likely because promotion focused people tend to focus more ideals and gains, where prevention focused people tend to focus more safety and risk. And also we proposed that these effect will be influenced by psychological distance. This study investigated these relationships using 186 under graduate students. The result of analysis indicated that promotion focused people responded more positively on the intention toward business start-up than prevention focused people. But it had not any effect on the attitude toward business start-up than prevention focused people. Self regulation focus and psychological distance turns out to be a significant factors that influence attitude and intention toward business start-up. Finally, we concluded with a discussion of the implications of the research findings and directions for future research.

• Journal of Digital Convergence
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• v.11 no.2
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• pp.167-174
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• 2013

In this study, we intended to show the interaction effect between brand reputation and chronic regulatory focus, and intended to show mederatory effect as an interaction as well as the main effect of two variable. To this end, Pulmuone(a high level of brand reputation) and Green(a low level of brand reputation) as parent brand and cosmetics as extention product were selected. The results of the study are as follows: The first, on brand extension evaluation, a high level of brand reputation was more positive than a low level of brand reputation. The second, brand extension evaluation was mere positive in the promotion focus group than in the prevention focus group. The third, In case of high level of brand reputation, there was no significant differences between the prevention focus group and the promotion focus group in brand extension evaluation. On the other hand, low level of brand reputation, there was significant differences between two variables. Therefore, we found the interaction effect between promotion focus group and prevention focus group.