• 한국통신학회논문지
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• 제40권8호
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• pp.1515-1517
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• 2015

이 논문에서는 두 표본을 쓰는 순위 검파기의 성능과 기준 표본 크기의 상관 관계를 모의실험을 통해 밝힌다. 기준 표본의 크기가 클수록 검파기의 성능은 더 우수하다. 다만 기준 표본 크기가 커질수록 성능향상은 포화된다.

• 동아시아식생활학회지
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• 제25권3호
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• pp.492-501
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• 2015

To improve the shortcomings of baked Yugwa 0.5, 1.0, 1.5 and 2.0% natural ind igestible materials,- (gellan gum, glucomannan and carrageenan) were each treated with glutinous rice-baked Yugwa was processed, and quality imprpvements were deducted. Baked Yugwa with natural additives,- (gellan gum, glucomannan and carrageenan) was compared,- to additional test results with sample 1.5%(w/w) additives,- The one showing the highest preference from the sensory test was the acid number reference group at $2.19{\pm}0.42$, while the sample groups,- with different additives, were lower than the reference group by $1.48{\pm}0.39$ to $1.67{\pm}0.68$. The peroxide number reference group showed the highest preference of $49.34{\pm}0.42$, whereas the sample groups, with different additives, showed lower preferences than the reference group by $36.72{\pm}$0.42 compared to the sample group of glucomannan 1.5% (w/w), $32.45{\pm}0.59$ compared to the sample group of gellan gum 1.5%(w/w), and $28.65{\pm}0.56$ compared to the sample group of carrageenan 1.5% (w/w). According to the preference test targeting employees of Korean cake, manufacturers, there was no significant difference in color and flavor among all groups, whereas the sample group of carrageenan 1.5% (w/w) showed the highest scores in items of taste, texture and overall-preference, and also sample groups of glucomannan 1.5% (w/w) and gellan gum 1.5% (w/w) scored higher than the reference group. Baked Yugwa with 1.5% (w/w) additives of carrageenan, glucomannan and gellan gum have higher marketability by decreasing deterioration caused by oxidation of existing deep fried Yugwa and by improving the solid texture of baked Yugwa.

• Journal of the Korean Data and Information Science Society
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• 제17권4호
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• pp.1365-1374
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• 2006

In this paper, we consider a decision-theoretic oriented, objective Bayesian inference for the difference between two normal means with known variances. We derive the Bayesian reference criterion as well as the intrinsic estimator and the credible region which correspond to the intrinsic discrepancy loss and the reference prior. We show the similarity between derived two-sample results and the results for the one-sample case in Bernardo(1999).

• 한국정보통신학회논문지
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• 제25권4호
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• pp.530-536
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• 2021

LBP 알고리즘은 지역적 질감표현이라는 특성을 가지고 있기 때문에 기준영상과 샘플 영상의 추출 위치와 크기에 따라 전혀 다른 결과를 얻을 수 있다. 이러한 단점을 해결하기 위하여 본 논문에서는 먼저 LBP 기본특성을 조사하고, 기준영상(100×100)의 크기를 영상내의 대부분의 특성을 포함할 수 있도록 하고, 임의의 지점에서 추출된 샘플영상(40×40)을 선택한다. 기준영상의 LBP와 샘플영상의 LBP 간의 상관관계를 이용하여 기준영상의 LBP에서의 매칭위치를 찾은 후, 카이분석 방법을 사용하여 샘플영상과 가장 일치하는 기준영상을 찾는 방법을 제시한다.

• 한국항공우주학회지
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• 제46권3호
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• pp.244-250
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• 2018

다변측정감시시스템은 탑재 트랜스폰더에서 전송되는 신호를 지상에 설치된 여러 수신기에서 획득하고 각각의 수신기의 신호 획득시간의 차를 이용하여 표적의 위치를 계산한다. TDOA(Time Difference Of Arrival) 계산 방법을 이용하는 다변측정감시시스템의 위치 정확도에 가장 큰 영향을 주는 요소 중 하나는 신호 입력 시각 측정 시 발생하는 오차이다. 수신기에서 신호 입력 시각을 측정할 경우 수신기의 기준 클럭을 이용하여 입력 신호를 샘플링하고 동일한 샘플링 레이트를 가지는 기준 샘플(Reference Sample)을 Cross Correlation 기법에 적용한다. 따라서 신호 입력 시각의 정밀도는 기준 클럭에 비례한다. 본 논문에서는 기준 샘플과 이를 샘플링 레이트보다 작은 시간으로 기준 샘플을 지연시킨 다수의 샘플(DRS, Delayed Reference Sample)을 수신기의 입력신호와 Cross Correlation을 수행하여 신호 입력 시각을 보다 정밀하게 측정하기 위한 알고리즘을 제안하였다. 이를 검증하기 위해 Matlab을 이용하여 타겟에서 송출하는 트랜스폰더의 펄스 신호를 구현하였으며 시뮬레이션을 통해 제안한 DRS와 입력신호와의 Cross Correlation을 수행하였다. 이 결과로 부터 신호 입력 시각 정밀 측정의 성능을 분석하였다.

• Journal of the Optical Society of Korea
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• 제15권4호
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• pp.380-385
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• 2011

Common-path interferometers are widely used for endoscopic optical coherence tomography (OCT) because an arbitrary arm length can be chosen for the endoscopic imaging probe. However, the scheme suffers from the limited range of the sample position distance from the end of the imaging probe because the position between the reference reflector and the sample is limited by the optical path-length difference (OPD) to induce an interference signal. In this study, we developed a novel method for compensating the arbitrary sample position in common-path swept-source OCT by adding an extra Mach-Zehnder interferometer in the post-path of the interfered optical signal. Theoretical analysis and an experimental demonstration of imaging depth tuning for the flexible sample position of an endoscopic OCT image are discussed. After post-tuning of sample position distance, the positioning limitation between the reference reflector and the sample can be solved for various sample positions over a range of 26 mm for the cross-sectional images of a fish eye sample.

• 대한임상검사과학회지
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• 제36권2호
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• pp.127-130
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• 2004

Analytical sensitivity on TDM test is the lowest concentration that can be distinguished from background noise. The aim of study was to evaluate analytical sensitivity that is also referred to as the lower limit of detection(LLD) about difference between zero calibrator and isotonic saline sample. We tested for 10 days with zero calibrators and 0.85% saline samples while running trilevel control samples under control. Raw data divided by two groups calculated mean and standard deviation from two sample populations and analytical sensitivity by ${\bar{X}}+2SD$. In comparison with isotonic saline samples and zero calibrators, there were significant differences in phenytoin, phenobarbital and vancomycin, etc. Especially analytical sensitivity on phenytoin is at the same level as the upper limit of analytical measurement range with $40{\mu}g/mL$. We think the cause of this is matrix interference. In conclusion, we were sure that standard protocol for analytical sensitivity as lower limit of analytical measurement range on TDM test must be measured with zero standard rather than an isotonic saline sample and type 1 reagent DW for reducing matrix effects within interactions between different materials in a mixture.

• 한국통신학회논문지
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• 제35권8C호
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• pp.709-712
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• 2010

이 논문에서는 시간상 확률 상관이 0이 아닌 약의존성 잡음 모형에서 두 표본을 쓰는 국소 최적 순위 검파기의 검정 통계량를 얻었다. 기준 관측과 보통 관측으로 이루어진 두 표본 관측 모형에서 약의존성 잡음 환경에 알맞은 국소 최적 순위 검파기의 검정 통계량을 네이먼 피어슨 정리로부터 유도하였다. 두 표본을 쓰는 국소 최적 순위 검파기는 한 표본을 쓰는 국소 최적 순위 검파기와 같은 점근 성능을 가지며 부호 통계량을 다룰 필요가 없어 얼개가 비교적 간단하다.

• Genomics & Informatics
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• 제15권3호
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• pp.108-111
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• 2017

Recently developed computational methods allow the imputation of human leukocyte antigen (HLA) genes using intergenic single nucleotide polymorphism markers. To improve the imputation accuracy in HLA imputation, it is essential to increase the sample size and the diversity of alleles in the reference panel. Our software, MergeReference, helps achieve this goal by providing a streamlined pipeline for combining multiple reference panels into one.

• Journal of the Korean Data and Information Science Society
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• 제21권6호
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• pp.1343-1351
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• 2010

Sample size determination is very important part in clinical trials because it influences the time and the cost of the experimental studies. In this article, we consider the Bayesian methods for sample size determination based on hypothesis testing. Specifically we compare the usual Bayesian method using Bayes factor with the decision theoretic method using Bayesian reference criterion in mean difference problem for the normal case with known variances. We illustrate two procedures numerically as well as graphically.