• 정보과학회 논문지
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• 제44권2호
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• pp.186-194
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• 2017

깊이 영상 기반 렌더링은 깊이 정보를 활용하여 가상 시점의 영상을 생성하는 기술로 다양한 3차원 영상시스템에서 필요로 하는 기술이다. 깊이 영상 기반 렌더링에서 가장 어려운 과제는 가상 시점 영상에서 새롭게 드러나는 부분을 채우는 과정이다. 영상 인페인팅은 이 과정에서 보편적으로 활용되는 방법이다. 본 논문에서는 홀을 채우는 과정에서 발생하는 오류를 줄이고 자연스럽게 채우는 방법을 제안한다. 먼저 색상 영상의 정보와 깊이 정보를 활용하여 지역적으로 적응적 패치 크기를 선택하도록 하였다. 또한 패치 간 유사도에 따라 홀을 채우는 방법을 한 번에 채우는 경우와 부분적으로 채우는 경우로 구분하였다. 이를 통해 오류의 발생을 줄이고 깊이 영상 기반 렌더링에서 가장 큰 문제가 되는 오류의 전파를 억제하였다. 실험을 통해 제안한 방법이 기존의 방법보다 시각적으로 자연스러운 가상 시점 영상을 생성하는 것을 확인하였다.

• 한국간호교육학회지
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• 제20권3호
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• pp.372-381
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• 2014

Purpose: This study aims to investigate the effects of a peer gatekeeper training program on existential spiritual well-being, interpersonal relationship with friends, and suicide probability for middle school students. Methods: The participants were fifty students who were at a vocational middle school in D city from october 13, 2012 to november 10, 2012. To test the effects of the peer gatekeeper training program, the participants were divided into two groups in the way of matching distribution, an experimental group(24) and a control group(26). Data were analyzed by Chi-square test, t-test, and Fisher exact probability test using the SPSS/WIN 12.0 program. Results: After attending the peer gatekeeper training program, significant differences between the experimental group and the control group were found in existential spiritual well-being(t=2.80, p=.007) and interpersonal relationship with friends scores(t=2.67, p=.010). However, there was no statistically significant difference in suicide probability between the two groups. Conclusion: The results indicate that the peer gatekeeper training program enhance existential spiritual well-being and interpersonal relationship with friends of middle school students. Therefore, this program could be a good strategy that teachers and community mental health nurses can use for suicide prevention of middle school students.

• 대한원격탐사학회지
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• 제29권6호
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• pp.601-610
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• 2013

As a standard water clarity variable, the vertical underwater visibility, called Secchi depth, is estimated with ocean color satellite data. In the present study, Moderate Resolvtion Imaging Spectradiometer (MODIS) data are used to measure the Secchi depth which is a useful indicator of ocean transparency for estimating the water quality and productivity. To estimate the Secchi depth $Z_v$, the empirical regression model is developed based on the satellite optical data and in-situ data. In the previous study, a semi-analytical algorithm for estimating $Z_v$ was developed and validated for Case 1 and 2 waters in both coastal and oceanic waters using extensive sets of satellite and in-situ data. The algorithm uses the vertical diffuse attenuation coefficient, $K_d$($m^{-1}$) and the beam attenuation coefficient, c($m^{-1}$) obtained from satellite ocean color data to estimate $Z_v$. In this study, the semi-analytical algorithm is validated using temporal MODIS data and in-situ data over the Yellow, Southern and East Seas including Case 1 and 2 waters. Using total 156 matching data, MODIS $Z_v$ data showed about 3.6m RMSE value and 1.7m bias value. The $Z_v$ values of the East Sea and Southern Sea showed higher RMSE than the Yellow Sea. Although the semi-analytical algorithm used the fixed coupling constant (= 6.0) transformed from Inherent Optical Properties (IOP) and Apparent Optical Properties (AOP) to Secchi depth, various coupling constants are needed for different sea types and water depth for the optimum estimation of $Z_v$.

• 한국소음진동공학회논문집
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• 제17권4호
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• pp.289-297
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• 2007

SAFRS is the system designed to reproduce the harmonic sound into the space according to the environmental factors. Here the harmonic sound means the sound which judged by the subjective tests, and the methods were suggested in the former studies. In this research, SAFRS was applied into the Square of D University to evaluate and verify the effectiveness of the system and a few evaluations were carried out as follows; 1) sound perception, frequency, volume and harmony with the space, 2) images of the square and acoustic environment and 3) acoustic environment with existing sounds, fountain sound, produced sound by SAFRS, and both of them respectively. The results can be summarized as follows; 1) According to the evaluation on acoustic environment, no relationships were shown between the cognition of sounds produced by SAFRS and the frequency or volume, but inverse proportion was shown between the volume and special harmony. 2) As the result of image evaluation. the relationship between space and sound image was shown proportional only except the evaluation on main road at night time, it means that the sound proposal with the visual contents matching with the sounds would be more effective than the proposal of sound only. 3) Results of evaluation on acoustic environment showed that the cognition effect at night time was shown higher than that of day time when only the acoustic element was given and the effect was increased when the visual elements matches with the acoustic elements if both of them were given. It confirmed the harmony between visual and acoustic elements was very important.

• 한국생활과학회지
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• 제14권5호
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• pp.833-846
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• 2005

The purpose of this study is to find out the various impressions that tone-on-tone coloration of shirts and ties gives. This experiment was based on the $2\times4\times4\times2$ factorial designs; colors (purple and green), shirt tones (vivid, light, dull, and dark), tie tones (vivid, light, dull, and dark) and perceivers' genders (male and female). The materials in the experiment developed for this study were composed of various stimuli and the response scales for each stimulus. The stimuli were 32 upper body photographs, which were color printed by CAD system (4D-box program). We unified those colors of shirts and ties, and then made shirt and tie tone different. 27 bi-polar adjectives, each of which was graded into seven in its degree, were used to evaluate the impression. The subjects of this research were 192 male and 192 female college students in Gyeongnam province including Jinju City. The data was analyzed by using SPSS program. Analyzing methods were one-way ANOVA and LSD test. The items of the adjectives were classified into 5 impression dimensions; potency, activeness, attractiveness, visibility and tenderness. In conclusion the impression through matching shirts and ties could be varied by the colors and the tones of shirts and ties. This study can be used as the basic color data in the males' clothes market which gradually pursuits high-quality, personality, and variety.

• 한국정보통신학회논문지
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• 제9권2호
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• pp.301-306
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• 2005

본 논문에서는 gain-boosting 회로를 이용하여 전류 미스매치를 줄일 수 있는 전하펌프와 전압제어 저항기를 사용하여 선형성이 우수한 래치 구조의 전압제어발생기를 제안하여 위상고정루프를 설계하였다. Cain-boosting 전하펌프를 사용한 위상고정루프는 루프필터 출력 전압 구간에서 11$mu$V(최대 43$mu$V, 최소 32$mu$V)의 전압 흔들림 차이를 나타내었다. 전압제어저항기를 이용한 전압제어발진기는 입력전압 동작 구간에서 우수한 선형성을 나타내었다. 또한 제작된 전압제어발진기의 위상 잡음 특성은 -1084Bc/Hz(a)100kHz이며 CMOS 공정으로 만들어진 LC 전압제어발진기와 비슷한 성능을 가진다. 0.35$mu$m CMOS 공정으로 시뮬레이션 하였으며 록킹 시간은 150$mu$s이다.

• 대한조선학회지
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• 제22권3호
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• pp.9-18
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• 1985

The numerical calculation for solving boundary-value problem related to potential flows with a free surface is carried out by application of the localized finite element method. Only forced motion of 2-D body in infinitely deep fluid is considered, although this schemes is equally applicable to any first order time-harmonic problems of similar nature. The infinite domain of the fluid is separated into the inner flow field and the outer flow field with common inter-surface boundary. The finite element method is applied to obtain the solution in the inner flow field and the Green functions are utilized to represent the solution in the outer flow field. At the inter-surface boundary, the continuity of the value of potential and the normal derivative of the potential(i.e. matching condition) is conserved. The present method has better computational efficiency than the previous LFEM and the integral equation method of Frank. This enhanced computational efficiency is presumably due to the fact that the present method gives a symmetric coefficient matrix and requires less computational time in calculating the influence coefficient matrix of Green function than the integral equation method. And the irregular frequency desen't exist because the uniqueness of the solution is assured by the such that the exact free surface condition is satisfied on the boundary of the localized finite element region(i.e. inner region). As an example of the above method, the hydrodynamic forces for the circular cylinder and the rectangular cylinders are calculated. In the computed results, the small number of singularity distribution segments($3{\sim}6$) give good result relative to Ursell's and Vugts'.

• 한국산업융합학회 논문집
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• 제21권2호
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• pp.87-93
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• 2018

This Study Propose A New Approach To Impliment A Intelligent Robot Control Based on Voice Recognition For Smart Factory Automation Since human usually communicate each other by voices, it is very convenient if voice is used to command humanoid robots or the other type robot system. A lot of researches has been performed about voice recognition systems for this purpose. Hidden Markov Model is a robust statistical methodology for efficient voice recognition in noise environments. It has being tested in a wide range of applications. A prediction approach traditionally applied for the text compression and coding, Prediction by Partial Matching which is a finite-context statistical modeling technique and can predict the next characters based on the context, has shown a great potential in developing novel solutions to several language modeling problems in speech recognition. It was illustrated the reliability of voice recognition by experiments for humanoid robot with 26 joints as the purpose of application to the manufacturing process.

• Asian-Australasian Journal of Animal Sciences
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• 제31권10호
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• pp.1558-1564
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• 2018

Objective: We report monitoring conservation effect for a Chinese indigenous chicken (Langshan) breed using major histocompatibility complex (MHC) and DNA barcords. Methods: The full length of MHC B-G gene and mitochondrial cytochrome oxidase I (COI) gene in generations 0, 5, 10, 15, 16, and 17 was measured using re-sequencing and sequencing procedures, respectively. Results: There were 292 single nucleotide polymorphisms of MHC B-G gene identified in six generations. Heterozygosity (He) and polymorphic information content (PIC) of MHC B-G gene in generations 10, 15, 16, and 17 remained stable. He and PIC of MHC B-G gene were different in six generations, with G10, G15, G16, G17 >G5>G0 (p<0.05). For the COI gene, there were five haplotypes in generations 0, 5, 10, 15, 16, and 17. Where Hap2 and Hap4 were the shared haplotypes, 164 individuals shared Hap2 haplotypes, while Hap1 and Hap3 were the shared haplotypes in generations 0 and 5 and Hap5 was a shared haplotype in generations 10, 15, 16, and 17. The sequence of COI gene in 6 generations was tested by Tajima's and D value, and the results were not significant, which were consistent with neutral mutation. There were no differences in generations 10, 15, 16, and 17for measured phenotypic traits. In other generations, for annual egg production, with G5, G10, G15, G16, G17>G0 (p<0.05). For age at the first egg and age at sexual maturity, with G10, G15, G16, G17>G5>G0 (p<0.05). Conclusion: Combined with the results of COI gene DNA barcodes, MHC B-G gene, and phenotypic traits we can see that genetic diversity remained stable from generations 10 to 17 and the equimultiple random matching pedigrees conservation population conservation effect of Langshan chicken was effective as measured by these criteria.

• 한국통신학회논문지
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• 제31권10C호
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• pp.1000-1010
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• 2006

본 논문은 DCT(Discrete Cosine Transform) 기반의 움직임 예측 및 보상을 위한 새로운 연산 아키텍처를 제안한다. 기존 방식들의 경우 연산 시간의 단축을 위하여 2차원 DCT 계수의 희소성을 충분히 활용하지 못하고 있다. 본 논문에서는 DCT 영역에서의 효율적인 움직임 예측을 위한 재귀 방정식을 유도하고, 이를 바탕으로 PE로 구성된 WAP를 개발한다. 또한, 재귀 방정식을 이용하여, 움직임 예측된 영상이 저주파 성분부터 고주파 성분까지 다양한 주파수 대역을 갖는 것이 가능함을 보인다. WAP는 아키텍처의 수정 없이 로그형 탐색이나 3단계 탐색과 같은 다양한 움직임 예측 알고리즘들을 수행할 수 있으며, 이러한 특성들은 비디오 부호화와 복호화에 필요한 전력 소모를 줄이기 위하여 이용될 수 있다. 본 논문에서 제안한 WAP 아키텍처는 계산의 복잡도와 연산 시간을 효과적으로 감소시키며, SAD기준을 이용한 DCT 영역에서의 움직임 예측 및 보상 방식은 SAD 또는 SSD 기준을 이용한 공간 영역에서의 움직임 예측 및 보상 방식보다 높은 PSNR과 압축률을 제공함을 보여준다.