셀기반 시그니쳐 트리 : 고차원 데이터의 유사성 검색을 위한 효율적인 색인 구조

송광택(Kwang-Taek Song),장재우(Jae-Woo Chang) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.1B

본 논문에서는 고차원의 특징 벡터 공간에서의 객체에 대한 효율적인 검색을 지원하는 셀기반 시그니쳐 트리 색인 구조(CS-트리, CI-트리)를 제안한다. 특징 벡터 공간을 셀로써 분할하고 특징 벡터는 셀의 시그니쳐로 표현되며 트리에 저장된다. 특징 벡터 대신 시그니쳐를 사용하며 트리의 깊이가 낮아짐으로서 검색을 효율적으로 수행할 수 있다. 또한 셀에 적합한 새로운 가지치기 거리를 이용한 유사성 검색 알고리즘을 제시한다. 마지막으로 우수한 고차원 색인 기법으로 알려져 있는 X-트리와 성능 비교를 수행하여, 성능비교 결과 본 논문에서 제안하는 CS-트리와 CI-트리가 검색 시간 측면에서 최대 30%의 검색 성능이 개선됨을 보인다.

내용 기반 멀티미디어 정보 검색을 위한 근사 k-최근접 데이타 탐색 알고리즘

송광택(Kwang-Taek Song),장재우(Jae-Woo Chang) 한국정보과학회 2000 정보과학회논문지 : 데이타베이스 Vol.27 No.2

내용 기반 멀티미디어 정보 검색에서 유사성에 기반한 k-최근접 데이타 탐색 질의는 매우 중요한 질의이다. 일반적으로 멀티미디어 데이타는 고차원 특징 벡터로 표현되기 때문에 기존의 k-최근접탐색 알고리즘은 멀티미디어 정보 검색에 효율적이지 못하다. 따라서 이러한 응용을 위해서는 다소 근사적 검색 결과를 가져오더라도 빠른 검색 성능을 제공하는 근사 k-최근접 탐색 알고리즘이 요구된다. 이를 위해 본 논문에서는 고차원 데이타를 위한 새로운 근사 k-최근접 탐색 알고리즘을 제안한다. 아울러, 제안하는 근사 k-최근접 탐색 알고리즘을 기존의 알고리즘과 검색 성능면에서 성능 평가를 수행한다. 성능 평가 결과, 기존 알고리즘의 검색 성능을 크게 개선할 수 있었다. The k-nearest neighbor search query based on similarity is very important for content-based multimedia information retrieval(MIR). The conventional exact k-nearest neighbor search algorithm is not efficient for the MIR application because multimedia data should be represented as high dimensional feature vectors. Thus, an approximate k-nearest neighbor search algorithm is required for the MIR applications because the performance increase may outweigh the drawback of receiving approximate results. For this, we propose a new approximate k-nearest neighbor search algorithm for high dimensional data. In addition, the comparison of the conventional algorithm with our approximate k-nearest neighbor search algorithm is performed in terms of retrieval performance. Results show that our algorithm is more efficient than the conventional ones.

特殊 家禽類(烏骨鷄, 꿩, 청둥오리)의 屠體分析

宋光澤,吳洪祿 충남대학교 농업과학연구소 1994 농업과학연구 Vol.21 No.1

This study was carried out to investigate meat production ability of special poultry(Ogol fowl, pheasant and mallard). The results obtained Were summarized as follows; 1. On the average live weight in male and female of Ogol fowl and mallard were 1,304.0∼1,311.8g. 1,013.0∼1,138.8g, respectively. The live weight of pheasant was lighter than that of Ogol fowl and mallard. The ratio of carcass to live weight in pheasant, Ogol fowl and mallard were 70.9∼72.2%, 66.9∼68.2% and 65.4∼65.9%, respectively. 2. On the edible giblets ratio to live weight. the that of mallard was the highest(6.3%). while the that of Ogol fowl was the lowest(4.7∼4.8%) in each individual poultry. 3. On the cut-up parts ratio to carcass weight. the neck(6.7∼8.3%) and back (16,1∼18.0%) ratio of pheasant were lower than that of Ogol fowl and mallard. but the neck(l1.1∼13.3%), wings(14.6∼16.2%) and back(23.6∼25.2%) ratio of mallard were higher than the others. 4. On the ratio of meat to breast and legs parts, the yield of breast meat was higher than that of legs meat of all poultries. In mallard, the skin ratio on both parts(17.6∼22.9%) was higher than the others, while the bone ratio of pheasant and Ogol fowl(15.6∼20.6) was higher than that of mallard.

우리 나라 농장 사육 타조 알의 난질 조사

송광택,오홍록 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.1

The fresh eggs of African ostrich in Korea were used in this study to investigate their interior and exterior quality characteristics. In ostrich egg shape characteristics, long and short length were measured as 15.1∼16.1 ㎝ and 12.1∼13.6 ㎝, respectively. The egg shape index was calculated as 81.0 and the egg shell showed a more gloss white in color than that of hen egg. Calculated breaking strength of egg shell and egg shell surface based on the equation were 41.155 ㎏/㎤ and 804.7 ㎠, respectively. Average egg shell thickness including egg shell membrane was 1.89 ㎜ and there are no differences among parts of the shell. The egg shell membrane thickness was 0.10 ㎜ showing relatively thick in equator compared with that of blunt end. The average number of egg shell pores was counted as 19.7/㎠ showing relatively high number of egg shell pores at point end and the total number of egg shell pores in an egg was estimated as 15,241. The relative portion of each parts based on egg weight was estimated as 25.1% for egg york, 58.2% for egg white, 16.7% for egg shell and the ratio of egg yolk to egg white(Y/W) was 0.43. The average diameter and the average height of ostrich egg white were 19.7 ㎝ and 13.2 ㎜, respectively. Calculated the H.U (Haugh Unit) was -69.7 and the pH was 8.3. In ostrich egg yolk, the diameter, the height, the egg yolk index, and it's pH were calculated as 14.4 ㎝, 29.4 ㎜, 0.20, and 6.6, respectively. And the egg yolk color showed a more thin in yellow chroma compared with that of hen egg as due to it's thicker membrane.

Glucose Oxidase에 依한 乾燥用 卵白의 酵素的 脫糖

宋光澤,吳洪祿,權純夔,李奉德 충남대학교 농업과학연구소 1984 農業技術硏究報告 Vol.11 No.2

The influences of some factors involved in removing glucose from egg white by the glucose oxidase system before drying were investigated. And the properties between foams prepared from raw and enzyme-treated egg white was compared. The results obtained were summarized as follows; 1. The dianisidine method was found to be suitable for the measurement of egg white glucose in the range up to 100ug/ml. 2. The optimal pH of glucose oxidase activity on glucose was found to be about 5.0, and thats activity was most stable in the pH range of about 4.0∼5.0 when that enzyme was treated for 30 minute at 50℃. 3. The optimal temperature for glucose oxidase reaction on glucose was found to be about 20℃, and that enzyme activity was stable up to 50℃. 4 . The removing rate of glucose from egg white with glucose oxidase was influenced by the enzyme concentration, pH and oxygen addition, and the reaction time of the desugarization was about 10 hours under the conditions of 0.5% hydrogen peroxide, pH 7.0 and 26℃. 5. All of the each egg white treated with glucose oxidase, glucose oxidase +pancreatin, glucose oxidase+trypsin showed highly foaming ability than that of natural egg white (control), but chats foam stability, on the contrary, was reversed.

DNA 분석법에 의한 한우고기 판별

오홍록,이창수,상병찬,송광택 충남대학교 농업과학연구소 2006 농업과학연구 Vol.33 No.1

This study was deal with the development of breed-specific DNA marker which is able to identify Hanwoo and European cattle breeds(Non-Hanwoo) meat. Genetic differentiation between Korean cattle(Hanwoo) and European cattle breeds was examined by Random Amplified Polymorphic DNA(RAPD) analysis. The RAPD patterns were identical among Non-Hanwoo, such as Holstein, Hereford. Aberdeen Angus. Brown Swiss. Limousin or Simmental. but the above pattern was different from that of Hanwoo. All bands detected in the Hanwoo samples were observed in Non-Hanwoo cattle samples, but one of the common bands found in samples was not detected in the Hanwoo samples. The band(1.4kb) may be useful as a marker for identifying a meat of Hanwoo from imported cattle meat. Actually, the detection of the DNA marker was tested by DNA analysis with 929 samples which were prepared from bloods of 673 Hanwoo cattles and 141 Holstein cattles, from 115 imported cattle meats. The DNA marker was absent in 644 of 673 Hanwoo cattles (96%) but present in 245 of 256 Non-Hanwoo cattles (95%). These results show that the DNA marker is effective to characterize Hanwoo and Non-Hanwoo meat by its detection. This DNA marker, however, was not useful in detecting unwanted crossbreeding between two cattle breeds, because the band pattern in hybrid cattle shows one of two band patterns in Hanwoo and Non-Hanwoo.