• 한국문헌정보학회지
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• 제58권2호
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• pp.81-100
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• 2024

본 연구는 JCR에 등재된 문헌정보학 분야 국제학술지를 중심으로 학술지 편집위원과 저자의 국적 다양성을 분석하고 Simpson 다양성 지수(Simpson's Diversity Index)를 통해 계량화하였다. 더불어 편집위원 국적 다양성이 저자의 국적 다양성을 유도할 수 있는지 확인하고, 학술지의 특성에 따라 다양성 지수에 차이가 나타나는지 검증하였다. 분석 결과, 첫 번째, LIS 국제 학술지의 편집위원 국적 다양성 지수는 0.64로 0.76인 저자 국적 다양성에 미치지 못하는 것으로 나타났으며, 편집위원과 저자의 국적 다양성은 높은 상관계수를 보이는 것으로 확인되었다(r = 0.79). 두 번째, IS(Information Science) 분야 저널은 편집위원과 저자 기여국에서 모두 0.8 전후의 높은 다양성이 나타났으나 LS(Library Science) 분야는 상대적으로 저조하며 특히 편집위원 다양성에서 0.48의 낮은 지수가 나타났다. 세 번째, 미국은 저자와 편집위원 모두 가장 높은 점유율을 나타내고 있으며, 특히 LS 분야 편집위원에서 53.39%의 압도적 점유를 보이는 것으로 확인되었다. 반면 한국을 포함한 아시아 국가는 저자에 비해 편집위원으로서 기여하는 비율이 미국과 유럽 국가에 비해 낮은 것으로 나타났다.

• Parasites, Hosts and Diseases
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• 제56권2호
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• pp.175-181
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• 2018

The giant roundworm Ascaris infects pigs and people worldwide and causes serious diseases. The taxonomic relationship between Ascaris suum and Ascaris lumbricoides is still unclear. The purpose of the present study was to investigate the genetic diversity and population genetic structure of 258 Ascaris specimens from humans and pigs from 6 sympatric regions in Ascaris-endemic regions of China using existing simple sequence repeat data. The microsatellite markers showed a high level of allelic richness and genetic diversity in the samples. Each of the populations demonstrated excess homozygosity (Ho0). According to a genetic differentiation index (Fst=0.0593), there was a high-level of gene flow in the Ascaris populations. A hierarchical analysis on molecular variance revealed remarkably high levels of variation within the populations. Moreover, a population structure analysis indicated that Ascaris populations fell into 3 main genetic clusters, interpreted as A. suum, A. lumbricoides, and a hybrid of the species. We speculated that humans can be infected with A. lumbricoides, A. suum, and the hybrid, but pigs were mainly infected with A. suum. This study provided new information on the genetic diversity and population structure of Ascaris from human and pigs in China, which can be used for designing Ascaris control strategies. It can also be beneficial to understand the introgression of host affiliation.

• Journal of Forest and Environmental Science
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• 제31권2호
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• pp.126-135
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• 2015

This study was conducted to evaluate the ecological characteristics of forest cover types which were classified by cluster analysis in the natural forest of Sobaeksan on the basis of the vegetation data from the point-quarter sampling method. Recognized forest cover types were 1) Mixed mesophytic forest, 2) Taxus cuspidata forest, 3) Fraxinus rhynchophylla-Quercus mongolica forest, 4) Betula ermanii forest, 5) Pinus densiflora forest, 6) Quercus mongolica mixed forest, and 7) Quercus mongolica pure forest. For those of classified types, the species composition was expressed by importance value (IV) to describe the community floristically. The species diversity was quantified using the Shannon's diversity index. The results showed that the forest cover types were characteristically different from one another in growing species and compositional rates, depending upon the type which was formed by a number of similar vegetational sample points. Species diversity indices (H') of total and overstory both were the highest in the mixed mesophytic forest (3.530 and 2.880, respectively), and lowest in the Q. mongolica pure forest (2.122 and 0.000, respectively) with only one canopy species. The highest species diversity in the mixed mesophytic forest may due to the relatively high species richness and evenness in the forest cover types. The description on ecological characteristics were suggested to understand the formation and development of forest cover types in this study area.

• 한국환경복원기술학회지
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• 제16권4호
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• pp.41-52
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• 2013

This study was carried out in order to analyze the succession characteristics of the slope of expressways and the results of analysis by collecting and analyzing various literatures and data from 2011 to 2012 and surveying 75 expressway slope, as follows : The construction methods applied to planting the slope of an expressway can be classified into 4 types including 3 Climber planting methods, 8 Vegetation thick-layer spray work methods, 4 Seed spray work methods, and 4 Stabilization work methods. The factors which affect the cover degree of the slope of an expressway were found to be development years, gradient, length, and azimuth. Like surrounding forest areas, the expressway slope was analyzed to begin the plant succession 20, 30, and 40 years after development, and plant succession was developed in diversity in a mixed stand forest according to surrounding forest floors. Species diversity, maximum species diversity, and the evenness of slope facing north were analyzed to be high comparing to those facing east, west, and south according to azimuth of slope. Species diversity, maximum species diversity, evenness of slope, and the plant succession of surroundings were analyzed to be high when the gradient of the slope was less than $40^{\circ}$. The dominant species which success on the slope of an expressway and its surrounding forest area included Miscanthus sinensis var. purpurascens, Zoysia japonica, Pinus thunbergii Parl, Rubus crataegifolius, Lespedeza cyrtobotrya, Amorpha fruticosa, Artemisia princeps var. orientalis, and Oenothera biennis.

• Journal of Ecology and Environment
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• 제36권3호
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• pp.205-210
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• 2013

Cicuta virosa L. (Apiaceae) is a perennial emergent plant designated as an endangered species in South Korea. According to the former records, only four natural habitats remain in South Korea. A former study suggested that three of four populations (Pyeongchang: PC, Hoengseong: HS, Gunsan: GS) would be classified as different ecotypes based on their different morphological characteristics and life cycle under different environmental conditions. To evaluate this suggestion, we estimated genetic diversity in each population and distance among three populations by random amplification of polymorphic DNA. Seven random primers generated a total of 61 different banding positions, 36 (59%) of them were polymorphic. Nei's gene diversity and the Shannon diversity index increased in the order of PC < HS < GS, which is the same order of population size. In the two-dimensional (2D) plot of first two principal components in principal component analysis with the presence of 61 loci, individuals could be grouped as three populations easily (proportion of variance = 0.6125). Nei's genetic distance for the three populations showed the same tendency with the geographical distance within three populations. And it is also similar to the result of discriminant analysis with the morphological or life-cycle factors from the previous study. From the results, we concluded that three different populations of C. virosa should be classified as ecotypes based on not only morphology and phenology but genetic differences in terms of diversity and distance as well.

• Mycobiology
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• 제47권1호
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• pp.76-86
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• 2019

Scab disease caused by Venturia nashicola is of agroeconomic importance in cultivation of Asian pear. However, little is known about the degree of genetic diversity in the populations of this pathogen. In this study, we collected 55 isolates from pear scab lesions in 13 major cultivation areas in Korea and examined the diversity using sequences of internal transcribed spacer (ITS) region, ${\beta}$-tubulin (TUB2), and translation elongation factor-$1{\alpha}$ ($TEF-1{\alpha}$) genes as molecular markers. Despite a low level of overall sequence variation, we found three distinctive subgroups from phylogenetic analysis of combined ITS, TUB2, and $TEF-1{\alpha}$ sequences. Among the three subgroups, subgroup 1 (60% of isolates collected) was predominant compared to subgroup 2 (23.6%) or subgroup 3 (16.4%) and was distributed throughout Korea. To understand the genetic diversity among the subgroups, RAPD analysis was performed. The isolates yielded highly diverse amplicon patterns and none of the defined subgroups within the dendrogram were supported by bootstrap values greater than 30%. Moreover, there is no significant correlation between the geographical distribution and the subgroups defined by molecular phylogeny. Our data suggest a low level of genetic diversification among the populations of V. nashicola in Korea.

• 아태비즈니스연구
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• 제12권4호
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• pp.211-225
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• 2021

Purpose - This study deals with the Openness to Diversity(OD) of soldiers in the military organization for efficient unit operation of the military organization composed of various soldier. The purpose of this study was to examine the effects of information and value OD on innovative behavior and the mediating effect of unit-members trust. Design/methodology/approach - The 269 samples of this study were surveyed on army soldiers. The Exploratory Factor Analysis (EFA), the multiple regression, bootstraping analysis were hired in order to analyze the data. Findings - The results showed that the information & value OD were positive(+) effect on innovative behavior. Unit-members trust showed a mediation effect between OD and innovative behavior. Research implications or Originality - First, according to Defense Reform 2.0, the military is expected to be composed of more diverse classes in the future. There is a theoretical contribution that examine their perception of diversity within the military. Second, OD was confirmed as a variable predicting the innovative behavior of soldiers and unit-memeber trust mediate the relationship between OD and invative behavior.

• Parasites, Hosts and Diseases
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• 제60권6호
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• pp.393-400
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• 2022

Human infection with simian malaria Plasmodium knowlesi is a cause for concern in Southeast Asian countries, especially in Malaysia. A previous study on Peninsular Malaysia P. knowlesi rhoptry associated protein-1 (PkRAP1) gene has discovered the existence of dimorphism. In this study, genetic analysis of PkRAP1 in a larger number of P. knowlesi samples from Malaysian Borneo was conducted. The PkRAP1 of these P. knowlesi isolates was PCR-amplified and sequenced. The newly obtained PkRAP1 gene sequences (n=34) were combined with those from the previous study (n=26) and analysed for polymorphism and natural selection. Sequence analysis revealed a higher genetic diversity of PkRAP1 compared to the previous study. Exon II of the gene had higher diversity (π=0.0172) than exon I (π=0.0128). The diversity of the total coding region (π=0.0167) was much higher than those of RAP1 orthologues such as PfRAP-1 (π=0.0041) and PvRAP1 (π=0.00088). Z-test results indicated that the gene was under purifying selection. Phylogenetic tree and haplotype network showed distinct clustering of Peninsular Malaysia and Malaysian Borneo PkRAP1 haplotypes. This geographical-based clustering of PkRAP1 haplotypes provides further evidence of the dimorphism of the gene and possible existence of 2 distinct P. knowlesi lineages in Malaysia.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.220-220
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• 2022

Disproportionating Enzyme 1 (DPE1) is an a-1,4-D-glucanotransferase that cleavages the a-1,4-glucosidic bonds and transfers glucosyl groups. In rice endosperm, it participates in starch synthesis by transferring maltooligosyl groups from amylose and amylopectin to amylopectin. Here, we investigated the haplotype variations and evolutionary indices (e.g., genetic diversity and population structure) for the DPE1 gene in 374 rice accessions representing seven subgroups (wild, indica, temperate japonica, tropical japonica, aus, aromatic, and admixture). Variant calling analysis of DPE1 coding regions leads to the identification of six functional haplotypes representing/occupying 8 nonsynonymous SNPs. Nucleotide diversity analysis revealed the highest pi-value in wild group (0.0556) compared to other cultivated groups, of which temperate japonica showed the most reduction of genetic diversity value (0.003). A significant positive Tajima's D value (1.6330) of admixture highlights sudden population contraction under balancing selection, while temperate japonica with the lowest Tajima's D value (-1.3523) showed a selection signature of DPE1 domestication which might be the cause of excess of rare alleles. Moreover, these two subpopulations exhibits a greater differentiation (F_ST=0.0148), indicating a higher genetic diversity. Our findings on functional DPE1 haplotypes will be useful in future breeding programs, and the evolutionary indices can also be applicable in functional studies of the DPE1 gene.

• 대한지리학회지
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• 제51권4호
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• pp.559-576
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• 2016

21세기 초 유네스코(UNESCO)의 "세계 문화 다양성 선언"과 함께 '문화 다양성' 개념은 교육, 과학, 문화 부문에서 국제 사회의 핵심 개념이자 화두로 부상하였다. 그런데 문화 다양성 개념은 "세계 문화 다양성 선언"이 발표되기 이전부터 개인 학자와 기관에 따라 여러 용례로 유통되었기 때문에, 유네스코의 문화 다양성 개념이 지닌 함축에 대한 특별한 이해를 선행하지 않고서는 교과목 수준의 적절하고 올바른 교육적 이행을 추구할 수가 없다. "세계 문화 다양성 선언"에 제시된 문화 다양성 개념의 궁극적 지향점은 '세계 평화'와 '다양한 인류 문화의 공존'이다. 이 점에서 그것은 현 세대뿐만 아니라 다음 세대에게 무엇보다 '교육적으로' 특별한 의미를 지닌다. 더구나 국제 사회의 지리교육계가 지난 2000년 세계지리학 대회를 계기로 "문화 다양성을 위한 지리교육 국제 선언"을 내놓은 만큼, "세계지리" 과목을 사례로 문화 다양성 교육의 실천 방안을 강구하는 것은 의미가 있다. 이에 본 연구는 유네스코의 관련 문헌들을 분석하여 문화 다양성 개념이 지닌 함축을 '이념으로서의 문화 다양성', '표상으로서의 문화 다양성', '비전으로서의 문화 다양성', '인식의 미학적 전환으로서의 문화 다양성'의 네 가지 층위에서 해석한 다음, "2015 개정 교육과정"의 "세계지리" 과목 입장에서 문화 다양성 교육을 위한 교수학습 자료의 예시와 활용을 중심으로 교육적 실천 방안을 제안하였다.