• 수산해양기술연구
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• 제59권3호
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• pp.221-230
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• 2023

Although the abundance of Metapenaeus joyneri resources with high commercial value was recently confirmed in the outer waters of Gomso Bay, located between Buan-gun and Gochang-gun, Jeollabuk-do, Metapenaeus joyneri resources have not been efficiently utilized due to the absence of fishing gears and methods for a selective Metapenaeus joyneri capture. Therefore, in this study, we adopted shrimp dredge as a trial fishing gear for the Metapenaeus joyneri capture, and analyzed the species composition and cluster community structure of aquatic organisms caught by the shrimp dredge, from May to September 2021 at the coastal waters of Gochang-gun, Jeollabuk-do. During the experimental period, 28 types of marine species of 29,190 individuals and 250,136 g of total biomass were caught. Among them, the population of Metapenaeus joyneri, the target species, dominated by 80.7%, followed by Thrysa chefuensis with 7.1%, and Leiognathus nuchalis with 6.0%, confirming that the fishing ratio of Metapenaeus joyneri was the highest among all species.

• 한국컴퓨터정보학회논문지
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• 제28권5호
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• pp.129-153
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• 2023

본 연구는 코로나19 팬데믹 상황이 심각하였을 때, 대중들의 관심도가 높은 코로나19 백신과 관련한 대량의 언론 보도 프레임을 분석하여, 위기커뮤니케이션의 핵심 요소로서 바람직한 언론의 역할과 방향성을 모색하기 위해 수행되었다. 본 연구의 기간은 코로나19 백신 개발이 가시화되기 시작한 2020년 11월부터 2021년 6월까지 8개월이며, 연구 대상은 대중 신뢰도 및 이용도 순위에 따라 조선일보, 중앙일보, 동아일보, 한겨레로 설정하였다. 결과의 정확성 및 효율성을 제고하기 위해 최신 빅데이터 연구 기법인 구조적 토픽 모델링(STM) 및 의미연결망 분석 기법을 활용하였다. 연구결과, 구성 단어들의 명확한 군집도 및 중심성 분석값을 기반으로 각 언론사 당 16개 프레임, 총 64개의 유의미한 프레임이 도출되었다. 또한 프레임의 구성 정도 및 내용에 대한 차이를 확인하기 위해 4개 언론사를 비교 분석하였으며, 모든 언론사마다 유의미한 차이가 없음을 확인하였다.

• 한국의류산업학회지
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• 제25권1호
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• pp.52-61
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• 2023

This study aimed to present data for the development of a shoe which is suitable for plus-size men (BMI 25kg/m² or higher) and to analyze the characteristics of each type of foot. The results of the study are as follows. To assess foot shape in relation to weight gain, participants were categorized into normal weight, overweight, and obese weight groups, according to their BMI indexes. Those in the normal weight group exhibited a smaller value than the overweight or obese weight group in all items. As a result of the cluster analysis, by type of foot, of the obese men category, men were classified into four BMI index groups: members of the type 1 group had a BMI index of 157 (18.4% of total sample), while for type 2 the figure was 213 (25.0% of sample), for type 3 it was 259 (30.4%), and for type 4 it stood at 224 (26.3% of total sample). Those from the type 1 group had thin ankles with narrow toes and flattened sides. Type 2 group members had thick ankles with well-developed outer feet and thick sides. Those within the type 3 group had medium-thick ankles with narrow feet but wide inner feet. Finally, those in the type 4 group had feet with a slanted side, as well as thick ankles, wide feet, and flat sides. Among these categories, the type 3 group members indicated the highest distribution.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.214-214
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• 2022

Soluble starch synthases (SSs) elongate α-glucans from ADP-Glc to the glucan nonreducing ends and play a critical role in synthesizing resistant starch in the rice. A total of 10 SSs isoforms were reported in rice, including granules-bound starch synthase I (GBSSI), GBSSII, starch synthase I (SSI), SSIIa (SSII-3), SSIIb (SSII-2), SSIIc (SSII-1), SSIIIa (SSIII-2), SSIIIb (SSIII-1), SSIVa (SSIV-1), and SSIVb (SSIV-2). SSIII proteins are involved in forming the B chain and elongating cluster filling chains in amylopectin metabolism. The functions of SSIIIb (SSIII-1) are less clear as compared to SSs. Here, we sought to shed light on the genetic diversity profiling of the SSIII-1 gene in 374 rice accessions composed of 54 wild-type accessions and 320 bred cultivars (temperate japonica, indica, tropical japonica, aus, aromatic, and admixture). In total, 17 haplotypes were identified in the SSIII-1 coding region of 320 bred cultivars, while 44 haplotypes were detected from 54 wild-type accessions. The genetic diversity indices revealed the most negative Tajima's D value in the temperate-japonica, followed by the wild type, while Tajima's D values in other ecotypes were positive, indicating balancing selection. Nucleotide diversity in the SSIII-1 region was highest in the wild group (0.0047) while lowest in temperate-japonica. Lower nucleotide diversity in the temperate-japonica is evidenced by the negative Tajima's D and suggested purifying selection. The fixation index (F_ST) revealed a very high level of gene flow (low F_ST) between the tropical-japonica and admixture groups (F_ST=-0.21) followed by admixture and wild groups (-0.04), indica and admixture groups (0.02), while low gene flow with higher F_ST estimates between the temperate-japonica and aus groups (0.72), tropical-japonica and aromatic groups (0.71), and temperate-japonica and admixture groups (0.52). Taken together, our study offers insights into haplotype diversity and evolutionary fingerprints of SSIII-1. It provides genomic information to increase the resistant starch content of cooked rice.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2020년도 춘계학술대회
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• pp.47-47
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• 2020

The Korean National Agrobiodiversity Center holds the more than 1300 accessions of proso millet, but a large portion of accessions are landrace of Korea that has very similar traits. To comprehend the maximum genetic diversity of this crop, a core collection with minimum number of accessions will facilitate easy access to genetic material. Here we assessed the genetic diversity and population structure in a germplasm collection of 830 accessions by employing EST-SSR markers and morphological traits. A total of 107 alleles were detected with an average allele number of 4.9 per locus among the 830 accessions based on 37 EST-SSR markers. The number of alleles per locus ranged from 2 to 7. Polymorphism information content and expected heterozygosity ranged from 0.06 to 0.68 (mean = 0.21) and 0.06 to 0.73 (mean = 0.23), respectively. The germplasm collection was separated into two groups based on population structure analysis, whereas principal coordinate analysis (PCoA) could not cluster accessions according to their geographic origin. Subsequently, a preliminarily developed core collection with a total of 141 accessions (17%) was selected from the whole set of germplasm by combining allelic variations of EST-SSR markers and eight different phenotypic traits. The core collection optimally represented the whole germplasm collection and displayed a similar level of PCoA value and genetic variation from the initial collection. The results obtained here provide a primary resource for further genetic analysis and establish a reference for further development of appropriate genetic breeding strategies.

• 무역학회지
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• 제46권5호
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• pp.65-81
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• 2021

The technological development in the era of the 4th industrial revolution is changing the paradigm of various industries. Various technologies such as big data, cloud, artificial intelligence, virtual reality, and the Internet of Things are used, creating synergy effects with existing industries, creating radical development and value creation. Among them, the logistics sector has been greatly influenced by quantitative data from the past and has been continuously accumulating and managing data, so it is highly likely to be linked with big data analysis and has a high utilization effect. The modern advanced technology has developed together with the data mining technology to discover hidden patterns and new correlations in such big data, and through this, meaningful results are being derived. Therefore, data mining occupies an important part in big data analysis, and this study tried to analyze data mining techniques that can contribute to the logistics field and common logistics using these data mining technologies. Therefore, by using the AHP technique, it was attempted to derive priorities for each type of efficient data mining for logisticalization, and R program and R Studio were used as tools to analyze this. Criteria of AHP method set association analysis, cluster analysis, decision tree method, artificial neural network method, web mining, and opinion mining. For the alternatives, common transport and delivery, common logistics center, common logistics information system, and common logistics partnership were set as factors.

• Journal of Platform Technology
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• 제11권5호
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• pp.23-36
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• 2023

이 연구는 내용 분석 기법과 해밍 거리 측정 방법을 적용하여 <흥부전> 이본의 계열과 계통을 미시적, 거시적으로 분석하는 것을 목적으로 한다. <흥부전>의 28개 이본을 내용 단락으로 분절하고 각 단락마다 내용 유형에 따라 내용 유형의 값을 인코딩하여서, 모든 이본의 유형 차이를 비교하였다. 28개 이본의 내용 단락 유형에 따른 차이를 종합하여서 이본의 친소 관계를 분석하기 위하여 거리 행렬로 변환하였다. 거리 행렬은 차원 축소 기법의 일종인 다차원 척도법을 적용하였고 그 결과 거리 행렬을 2차원 공간으로 축소하여 2차원 좌표를 구하였다. 다차원 척도법 분석 결과를 시각화하여서 흥부전 이본은 크게 2가지 계통으로 구분이 된다는 것을 확인하였다. 동일한 거리 행렬을 활용하여 28개 이본의 친소 관계 군집을 분석하기 위한 방법으로는 계층적 군집 분석과 계통분기분석방법을 적용하였다. 그 결과 2개의 이본 계통은 친소 관계의 미시적 분석 결과에 따라 5개의 계열이 존재하는 것을 확인하였다. 이 연구에서는 디지털 인문학 연구 방법을 적용하여 고전 문학 이본의 내용을 인코딩하고 그 데이터를 분석하는 방법을 적용하여 문헌의 내용 유사도에 따른 군집 분석 기법이 유용함을 보여주었다.

• Radiation Oncology Journal
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• 제29권3호
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• pp.164-173
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• 2011

Purpose: This research aimed to analyze the patterns of co-authorship network among the Korean radiation oncologists and to identify attributing factors for the formation of networks. Materials and Methods: A total of 1,447 articles including contents of ‘Radiation Oncology' and 'Therapeutic Radiology' were searched from the KoreaMed database. The co-authorship was assorted by the author's full name, affiliation and specialties. UCINET 6.0 was used to fi gure out the author's network centrality and the cluster analysis, and KeyPlayer 1.44 program was used to get a result of key player index. Sociogram was analyzed with the Netdraw 2.090. The statistical comparison was performed by a t-test and ANOVA using SPSS 16.0 with p-value < 0.05 as the significant value. Results: The number of articles written by a radiation oncologist as the first author was 1,025 out of 1,447. The pattern of coauthorship was classified into five groups. For articles of which the first author was a radiation oncologist, the number of singleauthor articles (type-A) was 81; single-institution articles (type-B) was 687; and multiple-author articles (type-C) was 257. For the articles which radiation oncologists participated in as a co-author, the number of single-institution articles (type-D) was 280 while multiple-institution articles (type-E) were 142. There were 8,895 authors from 1,366 co-authored articles, thus the average number of authors per article was 6.51. It was 5.73 for type-B, 6.44 for type-C, 7.90 for type-D, and 7.67 for type-E (p = 0.000) in the average number of authors per article. The number of authors for articles from the hospitals published more than 100 articles was 7.23 while form others was 5.94 (p = 0.005). Its number was 5.94 and 7.16 for the articles published before and after 2001 (p = 0.000). The articles written by a radiation oncologist as the first author had 5.92 authors while others for 7.82 (p = 0.025). Its number was 5.57 and 7.71 for the Journal of the Korean Society for Therapeutic Radiology and Oncology and others (p = 0.000), respectively. Among the analysis, a significant difference in the average number of author per article was indicated. The out-degree centrality of network among authors was 4.26% (2.03-7.09%) while in-degree centrality was 1.31% (0.53-2.84%). The three significant nodes were classified and listed as following: Choi, Eun Kyung for 1991-1995, Kim, Dae Young for 1998-2001, Park, Won and Lee, Sang Wook for 2003-2010. Choi, Eun Kyung and Kim, Dae Young appeared in two cases, and ranked as the highest degree in centrality. In the key player analysis, Choi, Eun Kyung and Lee, Sang Wook appeared in two cases, and ranked as the highest. From the cluster analysis, Sungkyunkwan University, Seoul National University and Yonsei University revealed as the three large clusters when Ulsan University, Chonnam National University, and Korea Institute of Radiological & Medical Science as the medium clusters. Conclusion: The Korean radiation oncologist's society shows a closed network with numerous relationships among the particular clusters, and the result indicates it is different from other institutions in the pattern of co-authorship formation of the major hospitals.

• 한국산림과학회지
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• 제90권3호
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• pp.380-387
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• 2001

점봉산 일대 천연활엽수림의 17개 주요 구성 수종을 대상으로 수직적 구조에서의 광선의 강도를 주요 환경경사로 할 경우와 수평적 분포에서의 다차원의 자원을 환경경사로 할 경우의 생태지위의 특성을 평가한 결과는 다음과 같다. 수직적 생태지위폭은 물푸레나무가 가장 크고, 다릅나무가 가장 작으며, 수평적 생태지위폭은 당단풍이 가장 크고, 거제수나무가 가장 작은 것으로 나타났는데, 수종별 두 가지 생태지위폭 간의 상관관계는 없었다. 수종의 내음성 지수가 높을수록 수직적 생태지위폭과 수평적 생태지위폭은 증가하는 것으로 나타났다. 수종의 내음성 지수 순위에 따른 수직적 및 수평적 생태지위폭 순위에 대하여 Spearman의 순위상관을 분석한 결과, 수직적 생태지위폭에 대한 순위상관계수는 $r_s=0.432$($P{\leq}0.1$)로 산출되어, 95% 확률수준에서 유의성이 없었는데, 아교목성 생육형을 지닌 까치박달을 제외하면, Spearman의 순위상관계수는 $r_s=0.650$($P{\leq}0.01$)로 산출되어 고도의 상관관계가 인정되었다. 수평적 생태지위폭에 대한 Spearman의 순위상관계수는 $r_s=0.797$($P{\leq}0.01$)로 산출되어 고도의 유의성이 있는 관계가 성립되었다. 수평적 분포에서의 수종간 생태지위중복도를 바탕으로 cluster분석을 하여 분류된 4가지 수종군은 입지 요구도가 비슷한 수종들로 이루어졌으며, 수종간 정의 상관관계를 갖는 수종들의 연결 양상과 상당히 부합되었다.

• 한국산림과학회지
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• 제94권6호
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• pp.446-452
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• 2005

노각나무의 천연분포지의 집단간 변이를 알아보기 위하여 조사지의 집단별 엽형질 형태적 특성을 분석한 결과, 엽병장과 거치수를 제의한 엽장, 엽폭, 엽면적, 엽맥수에서 금산 집단이 타 집단보다 비교적 적게 나타나는 경향을 보였다. 각 형질중 엽병장과 엽면적을 제외한 형질의 변이 계수는 11.6~17.4%로 비교적 변이의 폭이 적은 반면, 엽병장과 엽면적은 집단간 변이계수가 각각 34.9%, 28.4%로 그 변이가 심하였으며, 이들 형질의 집단내 변이계수도 엽병장이 29.5~42%, 엽면적은 27.7~40.7%의 범위로 변이폭이 크게 나타났다. 또한, 12개 엽특성간 단순상관 분석결과, 엽폭과 엽면적이 상관관계가 가장 높고(r=0.975) 다음이 엽장${\times}$엽면적, 엽장${\times}$엽폭이 각각 상관계수 0.971과 0.969로 매우 높았으며, 엽저각과 엽형지수간에는 높은 부의상관(r=-0.843)을 나타내어 엽저각이 커질수록 엽형지수는 작아지는 관계를 나타냈다. 양적 질적 측정치의 유이성(similarity)에 대한 척도로서 선발집단의 엽특성을 대상으로 군집분석을 실시한 결과, 거리수준 0.4에서 제 1군은 조계산, 가야산 집단, 제2군은 백운산집단, 제 3군은 운문산, 무등산집단 그리고 제 4군은 금산집단으로 4개의 군으로 구분할 수 있었다. 거리수준 0.6에서 2군으로 구분할 수 있었으며, 제 1군은 금산집단, 제 2군은 무등산, 운문산, 백운산, 가야산, 조계산 집단으로 구분되었다. 특히, 금산 집단은 엽장, 엽족, 엽면적 그리고 엽맥수의 엽형질 특성에 있어서 나머지 5개의 집단과 분명한 차이를 보이고 있었다. 추출된 12개 주성분 중에서 고유값(eigenvalue)이 1.0이상으로 의미를 갖는 주성분은 5가지 나타났으며, 전체분산에 대한 상위 2개 주성분의 설명력은 52.7%로 엽장, 엽폭의 엽형질이 기여도가 가장 높게 나타났으며, 5개 주성분을 모두 포함할 경우의 설명력은 91.3%였다.