• Proceedings of the Korean Vacuum Society Conference
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.198.2-198.2
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• 2014

We investigated change of the electronic structure, chemical states and elements ratio in graphene film by using photoelectron spectroscopy (PES). The graphene electrode has attracted considerable interest due to its possible applications in flexible organic light emitting diodes (F-OLEDs). However, to use the graphene for OLEDs, sufficient increase of work function is required, that is related with hole injection barrier. Plasma treatment is one of the most widely used method in OLEDs to increase the work function of the anode such as indium tin oxide (ITO). In this work, we used the plasma treatment, which is generated by various gas types such as O2, and Ar to increase the work function of the graphene film. From these results, we discuss the relation among the change of work function, plasma power, plasma treatment time and gas types.

• Journal of the Institute of Convergence Signal Processing
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• 제10권1호
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• pp.60-65
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• 2009

In this paper, we propose a new exponential pulse shaping function based on Chebychev identity equation and Bessel coefficients. The proposed pulse shaping function can produce various pulses with the different characteristics in the time and frequency domain by changing its two parameters. By differentiating the exponential pulse shaping function, we obtain new different pulse functions, in which the even order derivatives of the exponential pulse shaping function are orthogonal to its odd order derivatives. To find the efficiency of the proposed exponential pulse shaping function we analyze its essential characteristics and compare them with those of the conventional Gaussian pulses. We can choose the most suitable exponential pulse waveform according to the design criteria of communication systems.

• Journal of International Academy of Physical Therapy Research
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• 제5권2호
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• pp.714-717
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• 2014

The goal of this study was to assess the effect of a group exercise program on cognitive function of elderly people. Subjects were chosen to be elders with dementia having minor to moderate degrees of cognitive function. Study was started out by randomly dividing the 16 subjects into two groups, each with 8 people; the group exercise group and the control group. The group exercise group performed 8 weeks of group exercise program and general physiotherapy while the control group only performed general physiotherapy. Cognitive function was measured by Korean version mini-mental state examination. The study group's attention and calculation statistically significantly improved but the control group saw no statistically significant change. The group exercise program affected improvement in cognitive function of elderly people with dementia and in particular, was effective for enhancing their attention and calculation.

• Journal of Korea Society of Digital Industry and Information Management
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• 제7권2호
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• pp.115-125
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• 2011

An accurate estimation of software development size is an important factor in calculating reasonable cost of project development and determining its success. In this study, we propose estimation models, using function point based on the functional correlation between software, with empirical data. Three models($FP_{est}(I)$, $FP_{est}(II)$, $FP_{est}(III)$) are developed with correlation and regression analysis. The validity of the models is evaluated by the significance test by comparing values of Mean Magnitude of Relative Error (MMRE) and predictions of each model at level n%. Model $FP_{est}(III)$ proved to be superior to other models such as IFPC(Indicative Function Point Count), EFPC(Estimated Function Point Count), EPFS(Early Prediction of Function Size), $FP_{est}(I)$, and $FP_{est}(II)$. As a result, the accuracy of the model appears to be very high to determine the usefulness of the model to finally overcome weakness of other estimation models. The model can be efficiently used to estimate project development size including software size or manpower allocation.

• Journal of the Institute of Electronics Engineers of Korea TC
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• 제42권12호
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• pp.141-148
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• 2005

This paper addresses the design of srTCM (single rate Three Color Marker) described in RFC2697. It has proposed for srTCM to be used at the ingress of Differentiated Service network that provides AF PHB (Assured Forwarding Per Hop Behavior). srTCM is the marker with the metering function, and consists of the token updating function and the marking function. The token updating function uses the dual token bucket. The marking function compares the token values with the length of input packet, and then marks the result into IP QoS field (ToS field). This paper designs srTCM function and then implements it in one chip using VHDL and FPGA technology.

• Korean Journal of Occupational Health Nursing
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• 제22권4호
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• pp.334-342
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• 2013

Purpose: This study attempted to compare the metabolic syndrome components, liver function and heathy living habits according to abdominal obesity in male and female workers. Methods: The subjects of this study are 1,078 adult workers who visited N hospital in Incheon for health examination. The data were analyzed using t-test or $x^2$-test with the SPSS/WIN 20.0 program. Results: Prevalence of metabolic syndrome are 22.2% in male workers, and 5.2% in female workers. There were significant differences in 4 metabolic syndrome components (high blood pressure, elevated blood sugar, hypertriglyceridemia, low HDL cholesterolemia), abnormal liver function, and living habits (alcohol drinking) according to abdominal obesity in male workers. There were significant differences in 1 metabolic syndrome component (low HDL cholesterolemia), and abnormal liver function in female workers. Conclusion: It is important to manage all metabolic syndrome components and alcohol drinking in the case of male workers with abdominal obesity, and low HDL cholesterolemia in the case of female workers. Also, occupational nurses should include the relevance between abdominal obesity and liver function index when training health for workers in workplace.

• The Journal of Internal Korean Medicine
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• 제37권2호
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• pp.166-175
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• 2016

Objectives: This case study reports on improvements after treating patients who had abnormal liver function values in Soyangin gyolhyungjeung with Soyangin hyeongbangdojeok-san-gami.Methods: The study was carried out with three patients who showed abnormal liver function values in Soyangin gyolhyungjeung. Liver function tests (LFT) and numerical rating scales (NRS) were used to evaluate symptoms.Results: After we treated three patients with Soyangin hyeongbangdojeok-san-gami, their symptoms and LFT results had improved considerably.Conclusions: Soyangin hyeongbangdojeok-san-gami appears to have a useful effect on abnormal liver function values in Soyangin gyolhyungjeung. Further clinical studies are needed to verify these findings.

• Journal of Korea Multimedia Society
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• 제5권1호
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• pp.94-104
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• 2002

This paper presents a new way of texture mapping on the Genus N object constructed over a single domain. The problem of 2D texture mapping is the discontinuity of texture domain at the virtual boundary on the object. Such phenomenon decreases smoothness of the object as well as looks unnatural. Especially it is necessary for the Genus N object of infinite coninuity to apply the seamless texture mapping. For seamless texture mapping, a multiperiodic function, which transforms a discontinuous function into a continuous function, is suggested. In some applications, however, the visual seams on the textured object provide more realistic appearance. Therefore, this research supports the interactive control from the discontinuity and the continuity across the boundary using the coefficient of the weight function.

• Journal of Advanced Navigation Technology
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• 제17권6호
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• pp.652-657
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• 2013

In this paper the design methode of a separated composition state machine based on the compositive map with two chaotic maps together and the result of that is proposed. The digital circuits of chaotic composition map for the use of chaotic binary stream generator are designed in this work. The discretized truth table of chaotic composition function which is composed of two chaotic functions - the saw tooth function and skewed logistic function - is made out, and also simplefied Boolean algebras of digital circuits are obtained as a mathematical model. Consequently, the digital circuits of the map for chaotic composition function are presented in this paper.

• Journal of the Architectural Institute of Korea Planning & Design
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• 제34권11호
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• pp.67-74
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• 2018

With the rapid increase in the elderly population, numerous problems arise related to the decreased cognitive function such as the declines of reaction time and concentration which are both resulting from ageing. Recently, ICT-based smart home and other residential services are being developed as a means of complementing human cognitive functions, but the elderly, who are in most cases digital-illiterate, find it hard to utilize these tools actively and if so it usually takes longer time and endeavor for the elderly to be familiarized with ICT devices. In this context, this study suggests a configuration of the holographic system in houses that complement the cognitive function of the elderly with the consideration of the interaction with the vision which is a critical function in the cognitive process. The method of this study consists of a literature review on topics including the characteristics of the cognitive function among the elderly, holographic technology and residential services; a configuration of residential services for different space types, depending on the aspects of the cognitive function among the elderly; and finally a suggestion of a holographic system configuration and application depending on various scenarios.