• Journal of Communications and Networks
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• 제7권4호
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• pp.438-449
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• 2005

In this paper, we describes the information-theoretic approaches to sensor selection and sensor placement in sensor net­works for target localization and tracking. We have developed a sensor selection heuristic to activate the most informative candidate sensor for collaborative target localization and tracking. The fusion of the observation by the selected sensor with the prior target location distribution yields nearly the greatest reduction of the entropy of the expected posterior target location distribution. Our sensor selection heuristic is computationally less complex and thus more suitable to sensor networks with moderate computing power than the mutual information sensor selection criteria. We have also developed a method to compute the posterior target location distribution with the minimum entropy that could be achieved by the fusion of observations of the sensor network with a given deployment geometry. We have found that the covariance matrix of the posterior target location distribution with the minimum entropy is consistent with the Cramer-Rao lower bound (CRB) of the target location estimate. Using the minimum entropy of the posterior target location distribution, we have characterized the effect of the sensor placement geometry on the localization accuracy.

• Asian-Australasian Journal of Animal Sciences
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• 제14권8호
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• pp.1051-1056
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• 2001

Data for teat number for Landrace (L), Yorkshire (Y), crossbred of Landrace and Yorkshire (LY), and crossbred of Landrace, Yorkshire and Chinese indigenous Min Pig (LYM) were analyzed using Gibbs sampling. In Bayesian inference, flat priors and some informative priors were used to examine their influence on posterior estimates. The posterior mean estimates of heritabilities with flat priors were $0.661{\pm}0.035$ for L, $0.540{\pm}0.072$ for Y, $0.789{\pm}0.074$ for LY, and $0.577{\pm}0.058$ for LYM, and they did not differ (p>0.05) from their corresponding estimates of REML. When inverse Gamma densities for variance components were used as priors with the shape parameter of 4, the posterior estimates were still corresponding (p>0.05) to REML estimates and mean estimates using Gibbs sampling with flat priors. However, when the inverse Gamma densities with the shape parameter of 10 were utilized, some posterior estimates differed (p<0.10) from REML estimates and/or from other Gibbs mean estimates. The use of moderate degree of belief was influential to the posterior estimates, especially for Y and for LY where data sizes were small. When the data size is small, REML estimates of variance components have unknown distributions. On the other hand, Bayesian approach gives exact posterior densities of variance components. However, when the data size is small and prior knowledge is lacked, researchers should be careful with even moderate priors.

• 패션비즈니스
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• 제4권4호
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• pp.41-54
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• 2000

The purpose of this study was to investigate various expressions in textile design using CAD and present print design of '01/02 A/W. Four steps were taken in order to achieve this purpose. The first step was to investigate prior research and to analyze textile design methods using CAD. The second step was to study '01/02 A/W fashion trend, especially textile trend. The third step was to design the print design according to textile trend and apply the designed print pattern to real model. The research results are as follows: 1. Textile design is a very important field to help making fashion industry more informative and valuable. 2. Using CAD system in textile design will be very useful and urgent in saving working time and exercising design works. 3. In '01/02 A/W hound's tooth, zigzag, herringbone will be prevalent bold geometric patterns while tartan checks, multi color stripes will be popular too. 4. Textile designs using flower, stripe, checks, dot, abstract pattern were applied to real model, the images of patterns design are as follow, flower pattern-romantic stripe-avantgarde check-cute dotclassic abstract motive-intelligent.

• 한국융합학회논문지
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• 제11권9호
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• pp.99-107
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• 2020

밀레니얼 하이 테크 미디어의 개인화된 특성은 기존의 정형화된 크리에이티브 문법을 깨트리고 있다. 파괴적인 하이 테크 미디어의 정보 형태는 소비자의 성향이나 특성에 따라 상이하게 수용된다. 이 연구의 목적은 하이테크 미디어의 효율적인 크리에이티브 전략 수립을 위한 가이드라인을 탐색해 보는데 있다. 소비자의 심리적 성향에서 소비자 혁신성은 하이 테크 미디어의 크리에이티브를 평가하는데 핵심적인 요인이다. 소비자의 혁신성과 하이 테크 미디어의 크리에이티브 유형에 대한 설득 커뮤니케이션 효과를 알아 본 결과는 다음과 같다. 구체적(추상적) 크리에이티브 유형은 혁신성이 낮은 소비자보다 혁신성이 높은 소비자에게 광고에 대한 태도, 브랜드 태도, 구매의도 그리고 구전의도에서 높게 나타났다.

• Journal of Sport and Applied Science
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• 제5권2호
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• pp.9-15
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• 2021

Purpose: Prior literature posits that leadership of coach influences athletes' performance via delegate interactions. The purpose of this study is to investigate the effect of the type of instructor on the exercise stress of university athletes and to provide instructors with informative coaching methods especially for their leadership. Research design, data, and methodology: In order to achieve the purpose of the research, Seoul and Gyeonggi Province Materials University athletes were selected as a sample, 360 college athletes participated in the survey and data were screened and finally 314 were analyzed. The collected data were analyzed via descriptive analysis and multiple regressions. To examine the validity and reliability of the survey items, factor analysis and Cronbach's α were computed. Results: Coaches' leadership types are found to influence university athletes' exercise stress significantly. In specific, transformational leadership negatively influences teaching Complaints. Transformational leadership also negatively influences time constraints. However, transformational and transactional leadership do not have any effect on career concerns. transformational and transactional leadership also do not influence functional instability of college athletes. Conclusions: Overall, leadership types of coach partially influence exercise stress of athletes. These findings posit that transformational leadership contribute in developing reliable relationship between athletes and instructors. Further implications were discussed.

• 한국환경보건학회지
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• 제31권3호
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• pp.199-206
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• 2005

C. neoformans-associated cryptococcosis is primarily a disease of immunocompromised persons, has a world-wide distribution, and is often spread by pigeons in the urban environment. In contrast, C. gattii causes infection in normal hosts, has only been described in tropical and semi-tropical areas of the world, and has a unique niche in river gum Eucalyptus trees. Cryptococcosis is acquired through inhalation of the yeast propagules from the environment. C. gattii has been identified as the cause of an emerging infectious disease centered on Vancouver Island, British Columbia, Canada. No cases of C. gattii-disease were diagnosed prior to 1999; the current incidence rate is 36 cases per million population. A search was initiated in 2001 to find the ecological niche of this basidiomycetous yeast. C. gattii was found in the environment in treed areas of Vancouver Island. The highest percentage of colonized-tree clusters were found around central Vancouver Island, with decreasing rates of colonization to the north and south. Climate, soil and vegetation cover of this area, called the Coastal Douglas fir biogeoclimatic zone, is unique to British Columbia and Canada. The concentration of airborne C. gattii was highest in the dry summer months, and lowest during late fall, winter, and early spring, months which have heavy rainfall. The study of the emerging colonization of this organism and subsequent cases of environmentally acquired disease will be informative in planning public health management of new routes of exposure to exotic agents in areas impacted by changing climate and land use patterns.

• Journal of Preventive Medicine and Public Health
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• 제43권6호
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• pp.543-548
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• 2010

Objectives: The objective of this study was to calculate sample size and power in an ongoing cohort, Korea radiation effect and epidemiology cohort (KREEC). Method: Sample size calculation was performed using PASS 2002 based on Cox regression and Poisson regression models. Person-year was calculated by using data from '1993-1997 Total cancer incidence by sex and age, Seoul' and Korean statistical informative service. Results: With the assumption of relative risk=1.3, exposure:non-exposure=1:2 and power=0.8, sample size calculation was 405 events based on a Cox regression model. When the relative risk was assumed to be 1.5 then number of events was 170. Based on a Poisson regression model, relative risk=1.3, exposure:non-exposure=1:2 and power=0.8 rendered 385 events. Relative risk of 1.5 resulted in a total of 157 events. We calculated person-years (PY) with event numbers and cancer incidence rate in the nonexposure group. Based on a Cox regression model, with relative risk=1.3, exposure:non-exposure=1:2 and power=0.8, 136 245PY was needed to secure the power. In a Poisson regression model, with relative risk=1.3, exposure:non-exposure=1:2 and power=0.8, person-year needed was 129517PY. A total of 1939 cases were identified in KREEC until December 2007. Conclusions: A retrospective power calculation in an ongoing study might be biased by the data. Prospective power calculation should be carried out based on various assumptions prior to the study.

• 대한치과교정학회지
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• 제34권6호
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• pp.537-543
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• 2004

Microsatellite market는 유전연관분석을 위한 매우 유용한 유전표지이다. 그러나 대부분의 market들은 서양인의 정보를 이응하고 있으므로 다른 종족에서 사용할 때는 종족간에 존재할 수 있는 유전 변이의 현저한 차이를 검증해야 한다. 한국인과 일본인 집단에서 종족간 유전 변이를 조사하기 위하여, 각각 96명의 비 혈연관계의 한국인과 일본인 개체들에서 DNA를 채취하였다 그리고 microsatellite set(ABI PRISM Linkage Mapping Set- HDS, Applied Biosystems, Foster City, CA, USA)을 이용하여 1번 인간 염색체 전 부위에 걸쳐 51개의 microsatellite marker들을 배열하고 부착된 marker들의 위치를 분석하여 대립유전자 빈도와 이형질성을 결정하였다 그 결과, 한국인과 서양인 집단 사이에는 현저한 차이를 보였으나 한국인과 일본인 집단 사이에서는 매우 유사하였다. 본 연구의 결과는 유전 연관 연구에 앞서 일반적으로 상용되는 microsatellite marker에 관한 광범위한 검증을 반드시 시행하여야 한다는 것을 나타낸다. 또한 한국인과 일본인 집단 사이에서 유사하게 나타난 대립유전자 빈도와 이 형질성은 두 민족간의 동질성이 높다는 것을 의미하므로 두 민족을 대상으로 한 1번 인간염색체와 관련된 유전 질환의 유전 연관 연구를 시행할 때 동일한 microsatellite marker의 이용 가능성을 제시하였다.

• Journal of Genetic Medicine
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• 제19권1호
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• pp.7-13
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• 2022

Purpose: Preimplantation genetic testing for monogenic disorders (PGT-M) has been successfully used to prevent couples with monogenic disorders from passing them on to their child. Charcot-Marie-Tooth Disease (CMT) is a genetic disorder characterized by progressive extremity muscle degeneration and loss of sensory function. For the first time in Korea, we report our experience of applying single nucleotide polymorphism genotyping and karyomapping for PGT-M of CMT disease. Materials and Methods: Prior to clinical PGT-M, preclinical tests were performed using genotypes of affected families to identify informative single-nucleotide polymorphisms associated with mutant alleles. We performed five cycles of in vitro fertilization PGT-M in four couples with CMT1A, CMT2A, and CMT2S in CHA Fertility Center, Seoul Station. Results: From July 2020 through August 2021, five cycles of PGT-M with karyomapping in four cases with CMT1 and CMT2 were analyzed retrospectively. A total of 17 blastocysts were biopsied and 15 embryos were successfully diagnosed (88.2%). Ten out of 15 embryos were diagnosed as unaffected (66.7%). Five cycles of PGT-M resulted in four transfer cycles, in which four embryos were transferred. Three clinical pregnancies were achieved (75%) and the prenatal diagnosis by amniocentesis for all three women confirmed PGT-M of karyomapping. One woman delivered a healthy baby uneventfully and two pregnancies are currently ongoing. Conclusion: This is the first report in Korea on the application of karyomapping in PGT-M for CMT patients. This study shows that karyomapping is an efficient, reliable and accurate diagnostic method for PGT-M in various types of CMT diseases.

• 한국콘텐츠학회논문지
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• 제21권11호
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• pp.77-86
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• 2021

시간적인 차이를 두고 획득한 이질적인 과거 전쟁 결과 데이터를 하나의 모형으로 구축하는 방법으로 베이지안 추론에 의한 전쟁시뮬레이션 모형을 구축하는 방법을 제안하였다. 과거의 전쟁 결과를 분석하여 미래에 있을 수 있는 전쟁을 예측하는 방법으로 선형회귀모형을 적용하는 방법을 고려할 수 있다. 그러나 역사적으로 시대가 서로 달라 전장 환경의 변화가 반영된 이질적인 두 유형의 자료들이라면 모형의 가정사항 위반으로 하나의 선형회귀모형으로 적합하는 것은 적절하지 않다. 이러한 문제를 해결하기 위해 앞선 시대에 있는 자료를 비정보적 사전분포로 가정하여 사후분포를 구하고 이를 다음 시대에 얻은 자료를 분석하기 위한 사전분포로 활용하여 최종 사후분포를 추론하는 베이지안 추론 방법을 제안하였다. 베이지안 추론 방법의 또 다른 장점은 마코프 체인 몬테 카를로 방법으로 샘플링한 결과를 이용하여 불확실성이 반영된 사후분포나 사후예측분포를 추론할 수 있다는 점이다. 이렇게 했을 때 고전적인 선형회귀모형으로 분석하는 것보다 다양한 정보를 활용할 수 있을 뿐만 아니라 향후 추가적으로 획득되는 자료도 모형에 반영하여 모형을 계속 업데이트시킬 수 있다는 장점이 있다.