• Journal of the Korean Data and Information Science Society
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• v.28 no.6
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• pp.1371-1382
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• 2017

The purpose of this study was to identify the mediating effect of resilience in the relationship between stigma and quality of life (QOL) in lung cancer patients. Participants were 119 lung cancer patients who visited the outpatient department of a hospital. The subjects completed a questionnaire of stigma, resilience and QOL. Data were analyzed using t-test, ANOVA, Scheffe test, Pearson correlation, three-step regressions to test mediating effect and Sobel test. Stigma was negatively correlated with resilience and QOL. Resilience was positively correlated with QOL. Stigma explained 15.0% of the variance of resilience. Stigma and resilience explained 41.0% of the variance of QOL. Resilience had a partial mediating effect in the relationship between stigma and QOL. The results suggest that a nursing intervention to decrease stigma and enhance resilience is recommended to improve QOL in lung cancer patients.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.37 no.4
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• pp.38-44
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• 2000

In this paper, we have been fabricated λ/2 phase plates lot an optical pick-up using a blue violet laser diode by employing proton exchange and wet etching in LiNbO$_{3}$. Their functions and fabrication processes are described in detail. It is established the optimal fabrication conditions through the experimental results. The device characteristics are measured by the Mach-zender interferometer which is composed of the optical components and 632.8nm He-Ne laser. The measured phase error was ＋5$^{\circ}$~ -6$^{\circ}$(within 3%). This phase plate could be applied an useful device to improve the resolution and the stability of the optical pick-up which has a blue violet laser diode as an optical source.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.10
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• pp.69-76
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• 2016

In this paper, an efficient image denoising method using non-local means (NL-means) method in the transform domain is proposed. Survey for various image denoising methods has been given, and the performances of the image denoising method using NL-means method have been analyzed. We propose an efficient implementation method for NL-means method by calculating the weights for NL-means method in the DCT and LiftLT transform domain. By using the proposed method, the computational complexity is reduced, and the image denoising performance improves by using the characteristics of images in the tranform domain efficiently. Moreover, the proposed method can be applied efficiently for performing image denoising and image rescaling simultaneously. Extensive computer simulations show that the proposed method shows superior performance to the conventional methods.

• Journal of IKEEE
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• v.22 no.3
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• pp.733-737
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• 2018

In this paper, we describe the effects on the power system by adding renewable generator. In order to examine the stability of the system, the system analysis was performed using the PSS/E software. We confirmed whether occur the line overload of system through the load flow analysis and contingency analysis. and confirmed whether exceed of fault current using the fault current analysis. Dynamic stability of the system is analyzed through dynamic simulation. The analysis of the system according to the addition of the renewable generator was carried out according to the power system reliability and electricity quality maintenance standard.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.29 no.10
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• pp.791-798
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• 2018

The CFAR algorithm is mainly used for target detection in radar systems. In particular, OS CFAR is used in a non-uniform noise environment. However, it requires a large amount of computation, because it should sort reference cells in ascending order. This makes it difficult to apply the radar system in real time. In this paper, we describe how to reduce the computational burden of OS CFAR. We compared the power of the test cell and reference cell to determine only the presence or absence of target detection. The common reference cells overlapping in the reference cells of the three test cells are obtained. We first compare the test cell with the highest power value among the three test cells to the common reference cells. Next, we compare each test cell to general reference cells, excluding the common reference cells. The computation time is shortened by reducing the power comparison computation amounts.

• Journal of Korean Elementary Science Education
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• v.31 no.3
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• pp.398-412
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• 2012

과학 교과서는 과학 교육에 있어서 아주 중요한 역할을 하여 왔다. 교과서는 학생들이 학문적 경험을 하게끔 주도하며 학교 교육을 대표하는 수단이라고 할 수 있다(Valverde, Bianchi, Wolfe, Schmidt, & Houang, 2002). 그러나 과학 교육에서 교과서의 중요한 역할에도 불구하고, 국내외에서 그 연구가 미비하였다 (Good, 1993). 이 연구의 첫번째 과제로써 과학 교과서 연구 현황을 살펴보기 위해 지난 30여년간 미국에서 이루어진 초등 교과서와 관련된 연구들을 분석 및 정리하였다. 한편 과학의 본성에 대한 이해는 지난 반세기 동안 과학 교육에서 하나의 중요한 목표가 되어 왔으며, 미국의 여러 국가적 차원의 지침서에서는 그 중요성을 강조하였다 (NRC, 1996; AAAS, 1990, 1993). 그럼에도 불구하고 과학 교과서 연구에서 과학의 본성에 관련한 선행 연구가 거의 없다는 것을 알고, 본 연구의 두번째 과제로써 현재 미국 초등 교과서에 나타난 과학의 본성에 대한 연구를 4가지 주제에 근거하여 분석하였다. 과학의 본성에 대한 4가지 주제는 (a)지식 체계로서의 과학, (b) 탐구 방법으로의 과학, (c) 생각의 방법으로의 과학, 그리고 (d) 과학과 기술, 그리고 사회와 연관된 관계 (Chiappetta, Fillman, & Sethna, 2004)로서, 본 연구에서는 미국 초등 과학 교과서에 나타난 이 4가지 주제를 학년별 및 출판사별로 4가지 영역의 포함 정도를 퍼센트로 산출하였다. 또한 도입 단원 전체를 분석하였으므로, 단원 전반적 내용에 내포된 과학의 본성에 대한 측면을 연구자의 직관과 전문성에 근거하여 서술적인 방식으로 토의하였다.

• Journal of the Korean Geotechnical Society
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• v.21 no.2
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• pp.137-144
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• 2005

A direct shear test is classified roughly by one side simple shear test of confining horizontal displacement type and torsional shear test of non-confining one. Direct shear test that has been widely used so far has some problems with test apparatus, testing and the analysis, and in particular that its strength value is everestimated in sandy soils. Also, progressive failure of shearing process happens from shear apparatus restriction and because the shear strain and shear stress are erratic in specimen, we can not define the shear strain value. In the meantime, a simple shear test having advantage of direct shear test is an ideal test method that can get stress-strain relation on shear because it can deliver constant shearing deformation to specimen. However, simple shear test cannot be used practically, because its structure makes tester manufacturing difficult. This paper described a on outline of test apparatus, improvement of test method, and constant pressure test results based on the obtained from improved direct shear apparatus and the standardization of JGS soil testing method.

• Journal of Korean Home Economics Education Association
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• v.22 no.4
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• pp.1-13
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• 2010

The purpose of this study was to examine how the basic directions proposed in the Dietary Education Support Act were reflected in the dietary section of home economics textbooks for middle schools. The eleven different kinds of the 2007 revised textbooks were considered in the study. It was found that all of the textbooks considered reflected well in general the basic directions in the Dietary Support Act - formation of healthy dietary habits, promotion of dietary activities, practice of green dietary, preservation of traditional dietary, utilization of local food products, etc. in terms of their organization and description. However, it was also revealed that there were great differences among them in their treatment of visual materials like figures, photos, graphs, etc., news articles, and interesting anecdotal stories.

• Aerospace Engineering and Technology
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• v.12 no.2
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• pp.14-23
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• 2013

Fault management design of the satellite describes preparations for failures which can occur during operational phase. Fault management design contains detection and isolation function of anomaly, and also it contains function to maintain the satellite in safe condition until the ground station finds out a cause of failure and takes a countermeasure. Unlike normal operation, safing operation is automatically performed by Power Control and Distribution Unit and Integrated Bus Management Unit which loads Flight Software without intervention of ground station. Since fault management operation is automatical, fault management logic and functionality of relevant hardware should be thoroughly checked during ground test phase, and error which is similar to actual should be carefully applied without damage. Verification test for fault management design is conducted for various subsystems of satellite. In this paper, we show the design process of fault management design verification test for Electrical Power Subsystem and Attitude and Orbit Control Subsystem of Low Earth Orbit satellite flight model and the test results.

• Journal of Korea Game Society
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• v.16 no.6
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• pp.19-28
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• 2016

Digital games are generating various types of virtual landscape and the importance of virtual landscape has been arises. However, there has not been any research done how to design the virtual landscape. To establish virtual landscape design methodology, establishing the classification system and suggesting the representative type of virtual landscape is needed. With this research, I collected the classification standard and established five standards; story, cooperation, interaction level, dimensions and shape of the space. With that system, I classified digital game and could prove the effectiveness. Also by classifying cases through 20 years of timeline, I could come out with three representative types. This result will work as a reference to the future research; establishing design methodology on virtual landscape.