• 대한정형외과 초음파학회지
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• 제4권1호
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• pp.1-6
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• 2011

목적: 자기 공명 영상 시행 전에 내측 반월상 연골의 파열 진단에서의 초음파 검사의 유용성을 알아보고자 하였다. 대상 및 방법: 2009년 4월부터 2010년 9월까지 본원 정형외과 외래를 방문하여 내측 반월상 연골 파열 의심 하에 초음파 검사를 시행한 341예 중 자기 공명 영상 검사를 시행한 147예를 대상으로 하였다. 초음파 검사상 이상 소견을 보이지 않는 16예, 비균질성(inhomogeneity)만을 보인 12예, 무리(cluster)를 보인 4예, 실질 내에 틈(cleavage)을 보인 60예, 5 mm 이상의 내측 탈출(extrusion)을 보인 55예를 자기 공명 영상 검사 결과와 비교 하였다. 통계학적으로 민감도와 특이도, 양성 예측률과 음성 예측률을 구하였다. 결과: 자기 공명 영상에서 파열을 보인 경우는 104예였다. 초음파 검사는 자기 공명 영상에 대하여 민감도가 94.2%, 특이도는 23.3%로 측정 되었다. 양성 예측률은 74.8%, 음성 예측률은 62.5%로 측정되었다. 초음파 영상에 따른 양성 예측률은 비균질성이 보이는 경우 58.3%, 무리를 보이는 경우에는 100%, 실질 내에 틈을 보이는 경우 75%, 내측 탈출을 보이는 경우 80%로 나타났다. 결론: 내측 반월상 연골 파열의 진단에 있어 고가의 자기 공명 영상을 시행하기 전 초음파 검사는 파열 가능성 여부를 사전에 아는데 유용하였다.

• Reproductive and Developmental Biology
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• 제29권4호
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• pp.213-221
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• 2005

We used nine decamer primers to generate DNA fragment sizes ranging from 100 bp to 1,600 bp from two bullhead (Pseudobagrus fulvidraco) populations of Dangjin in Korea. 376 fragments were identified in the cultured bullhead population, and 454 in the population of wild bullhead from Dangjin: 287 specific fragments $(76.3\%)$ in the cultured bullhead population and 207 $(45.6\%)$ in the wild bullhead population. On average, a decamer primer was used to generate 34.2 amplified products in a cultured bullhead. A RAPD primer was used to generate an average of 3.1 amplified bands per sample, ranging between 2.5 and 6.0 fragments in this population. Nine primers also generated 24 polymorphic fragments (24/376 fragment, $6.4\%$) in the cultured bullhead population, and 24 (24/454 fragments, $5.2\%$) in the wild bullhead population. The OPA-16 primer, notably, produced which 11 out of 11 bands $(100\%)$ were monomorphic in the wild bullhead population. 110 intra-population-specific fragments, with an average of 12.2 per primer, were observed in the cultured bullhead population. 99 fragments, with an average of 11.0 per primer, were identified in the wild bullhead. Especially, 55 inter-population-common fragments, with an average of 6.1 per primer, were observed in the two bullhead populations. The bandsharing value (BS value) of individuals within the wild bullhead population was substantially higher than was determined in the cultured bullhead population. The average bandsharing value was $0.596\pm0.010$ within the cultured bullhead population,. and $0.657\pm0.010$ within the wild bullhead population. The dendrogram obtained with the nine primers indicates two genetic clusters, designated cluster $1\;(CULTURED\;01\~CULTURED\;11)$, and cluster $2\;(WILD\;12\~WILD\;22)$. Ultimately, the longest genetic distance displaying significant molecular differences was determined to exist between individuals in the two bullhead populations, namely between individuals WILD no. 19 of the wild bullhead population and CULTURED no. 03 of the cultured bullhead population (genetic distance = 0.714). RAPD-PCR allowed us to detect the existence of population discrimination and genetic variation in Korean population of bullhead. This finding indicates that this method constitutes a suitable tool for DNA comparison, both within and between individuals, populations, species, and genera.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.151-152
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• 2012

본 논문은 지역의 의사 결정 트리와 클러스터링을 사용하여 장면 전환 검출 방법을 제시한다. 지역 의사 결정 트리는 클러스터 경계선 검출 장면과 그 인접 프레임의 사이의 차이 값을 시간 유사분포를 비교하기 위해 같은 방식으로 검출하고, 그리고 클러스터 단위로 차이 값의 유사성과 그룹 프레임의 끊어지지 않는 시퀀스를 감지한다.

• 복식문화연구
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• 제7권3호
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• pp.122-133
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• 1999

The purpose of this study was to classify the somatotype on obese boys of 9 to 11 years old and to make an offer the basis which would be suitable for basic pattern construction by studying of their characteristics, forms and shapes. For this study, data were analyzed by using of photographic measurements in regard to 40 variables. The factor scores used in factor analysis become the basis of determining the value of each variable of the cluster analysis. 1) Eight main factors were extracted from factor analysis. 2) Three types were classified by cluster analysis. 3) Correspondent analysis was applied to data of 4 types in anthropometry between 3 types in photometry.

• 한국정보통신학회논문지
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• 제16권6호
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• pp.1199-1203
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• 2012

본 논문은 지역의 의사 결정 트리와 클러스터링을 사용하여 장면 전환 검출 방법을 제시한다. 지역 의사 결정 트리는 클러스터 경계 검출 장면과 그 인접 프레임의 사이의 차이 값을 시간 유사 분포를 비교하기 위해 같은 방식으로 검출하고, 그리고 클러스터 단위로 차이 값의 유사성과 그룹 프레임의 끊어지지 않는 시퀀스를 감지한다.

• 한국정밀공학회지
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• 제29권5호
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• pp.494-499
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• 2012

Reliable results can't be derived without the notion of measurement uncertainty. The reason is that the measured value includes a lot of uncertain factors. Finding the factor that affect the measurement of parameter is important for estimation of measurement uncertainty. In this paper, the evaluation of uncertainty analysis about positioning accuracy measurements of high precision feed mechanism is presented to evaluate the important factors of uncertainty.

• 한국세라믹학회지
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• 제34권11호
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• pp.1121-1128
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• 1997

In this study, the Ar plasma treatment was used to improve the surface roughness of Poly-Si1-xGex thin film deposited by RTCVD. The surface roughness and the resistivity of Si1-xGex thin film were investigated with variation of Ar plasma treatment parameters (electrode distance, working pressure, time, substrate temperature and R.F power). When the Ar plasma treatment was used, the cluster size decreased by the surface etching effect due to the increasing surface collision energy of particles (ion, neutral atom) in plasma under the conditions of decreasing electrode distance and increasing pressure, time, temperature, and R. F power. Although the surface roughness value decreased by the reduction of the cluster size due to surface etching effect, however, the resistivity increased. This may be due to the surface damage caused by the increasing surface collision energy. It was concluded that the surface roughness could be improved by the Ar plasma treatment, while the resistivity was increased by the surface damage on the substrate.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.629-630
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• 2008

MANET is depended on the property as like variable energy, high degree of mobility, location environments of nodes etc. So, in this paper, we propose an algorithm techniques which is TICC (Time Interval Clustering Control) based on energy value in property of each node for solving cluster problem. It provides improving cluster energy efficiency how can being node manage to order each node's energy level. TICC is clustering method. It has shown that Node's energy efficiency and life time are improved in MANET.

• 한국의류학회지
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• 제27권7호
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• pp.800-808
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• 2003

The sensibilities of cotton fabrics were subjectively evaluated by 126 subjects with 7-points scale questionnaires using the 4-dimensions and 8-axes system, which was composed of adjectives such as ‘masculine-feminine’,‘new-old’,‘casual-classical’, and ‘ambiguous-arranged’. And the sensibilities of cotton fabrics were classified through the cluster analysis. Also, we measured color and physical characteristics, which were variables to have an effect on the sensibilities of cotton fabrics. The sensibilities of cotton fabrics were classified into 8 groups such as ‘feminine, arranged, and classical sensibility’,‘arranged, classical, and old sensibility’,‘feminine sensibility’,‘new, feminine, and ambiguous sensibility’,‘casual and new sensibility’, and ‘ambiguous and old sensibility’The sensibilities of cotton fabrics were more influenced by color characteristics such as value, chroma, and hue than by physical characteristics.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
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• pp.2371-2374
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• 2003

In transmitting compressed video bit-stream over Internet, packet loss causes error propagation in both spatial and temporal domain, which in turn leads to severe degradation in image qualify In this paper, a new approach for the recovery of lost or erroneous Motion Vector(MV)s by clustering the movements of neighboring blocks by their homogeneity is proposed. MVs of neighboring blocks are clustered according to ALA(Average Linkage Algorithm) clustering and a representative value for each cluster is determined to obtain the candidate MV set. By computing the distortion of the candidates, a MV with the minimum distortion is selected. Experimental results show that the proposed algorithm exhibits better performance in many cases than existing methods.