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정나라,남영우,이원훈 한국응용곤충학회 2022 한국응용곤충학회지 Vol.61 No.3
매미나방은 산림과 과수에 심각한 피해를 입히는 해충이다. 본 연구에서는 국내 매미나방의 미토콘드리아 게놈(15,548 bp)을 분석하였다. 13개의 PCG와 2개의 rRNA를 연결한 서열(13,568 bp)을 사용한 23개의 미토콘드리아 게놈의 계통분석 결과, 분석한 매미나방은 다른 지역의 매미나방과 같은 과에 속하며 각각의 과(Erebidae, Euteliidae, Noctuidae, Nolidae, Notodontidae)들은 높은 노드수치로 단계통을 형성하였다.
정나라,남영우,이원훈,Na Ra, Jeong,Youngwoo, Nam,Wonhoon, Lee 한국응용곤충학회 2022 한국응용곤충학회지 Vol.61 No.3
The Gypsy moth, Lymantria dispar (Linnaeus, 1758) (Lepidoptera: Erebidae) is a serious pest that attacks forest as well as fruit trees. We sequenced the 15,548 bp long complete mitochondrial genome (mitogenome) of this species. It consists of a typical set of genes (13 protein-coding genes, 2 rRNA genes, and 22 tRNA genes) and one major non-coding A + T-rich region. The orientation and gene order of the L. dispar mitogenome are identical to that of the ancestral type found in majority of the insects. Phylogenetic analyses using concatenated sequences of 13 PCGs and 2 rRNAs (13,568 bp including gaps) revealed that the L. dispar examined in our study, together with other geographical samples of L. dispar in a group forming the family Erebidae and consistently supported the monophyly of each family (Erebidae, Euteliidae, Noctuidae, Nolidae and Notodontidae), generally with the highest nodal supports.
『주택연구』의 30년간 연구경향: 텍스트 마이닝 접근법
박순만,이호진,정은상,유승동,남영우,지규현 한국주택학회 2022 주택연구 Vol.30 No.3
We analyze the research trend of the Housing Research Review over the period of 1993 to 2021. In particular, adopting text-mining methodologies: word frequency analysis, wordcloud technique, N-gram, and Topic Modeling, we analyze titles and keywords of all the papers on the journal. Based on those analyses, we find that words that the papers on the journal most frequently used over the past 30 years are ‘housing’ and ‘research’, which are followed by ‘price’, ‘househhold’ and ‘income’. Our word proximity analsyis shows the most-related keywords; housing prices, housing markets, fluctuations, and trading volume in terms of market and price structure; housing occupancy and household changes in terms of housing demand. Our analysis of Latent Dirichlet Allocation reveals six categories; ‘the ownership and apartments’, ‘price and space’, ‘real estate policy and regulation’, ‘household’s decision in housing market’, ‘regional characteristics evaluation’, and ‘residency and rental housing’. The most interested topics are related to ‘price’, and we confirm that the topics of interest has been changed over the decades; from ‘development and management’ and ‘rental housing and real estate’ to ‘public housing’. In addition, our analysis confirms that housing research on Housing Studies Review is comprehensive and includes a variety of housing topics. 본 연구에서는 텍스트마이닝 방법론을 활용하여 1993-2021년 상반기까지 『주택연구』에 게재된 연구논문의 연구경향을 분석하였다. 지난 약 30년 동안 본 학술지에 게재된 약 600여편에 이르는 본문 텍스트 자료를 이용하여 최빈단어를 도출하고, 워드클라우드 기법으로 텍스트 분석을 실시하였다. 그리고 개별 연구논문의 제목 및 키워드에 기반한 텍스트 자료를 이용하여 토픽모델링 기법을 통해 연구 논문들의 주제를 분류하였다. 분석결과 연구 본문에서 가장 많이 등장한 용어는 ‘주택’과 ‘연구’였으며, 이를 제외하고 가장 많이 등장한 단어는 ‘가격’, ‘가구’, ‘소득’ 등이었다. 근접단어빈도 분석 결과 시장과 가격구조 측면에서는 주택가격, 주택시장, 변동, 거래량 등이, 수요 측면에서는 주택점유형태와 가구변화가 주요 연관 키워드로 등장하였다. 토픽 모델링(LDA)방법론을 이용하여 ‘공동주택의 소유 및 이용’, ‘가격과 공간의 이용’, ‘부동산 정책과 제도’, ‘주택시장 가구선택’, ‘지역별 특성 평가’, ‘주거 및 임대주택’ 의 6개 주제를 선정하였다. 텍스트 자료를 분석한 결과 『주택연구』에서 가장 관심이 높은 주제는 ‘가격’이었다. 10년 단위로 구분한 시대의 흐름에 따라 ‘개발과 관리’, ‘임대주택과 부동산’, ‘공공’ 으로 관심 주제가 변화한 것을 확인하였다. 이를 통하여 주택과 관련한 매우 종합적이고도 다양한 주제가 존재함을 확인하였다.
최홍규,이채영,Goon-Bo Kim,남영우,Kenneth R. Schraufnagle,정영수,이재헌,김도훈,정호원 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.2
Recent studies have shown that an intron is notmerely ‘‘junk’’, but something that plays important roles inmany biological processes such as gene expression regulationand alternative splicing. For purposes of studyingintron structures and predicting consensus splice motifs, atotal of 102 legume species were used to isolate intronsacross the family. Of 196 gene-targeted PCR primer pairs,we successfully amplified 118 intron-containing genes(60.2 %) and obtained a total of 1,870 introns with anaverage size of 143 nucleotides, ranging from 61 to 1,036. Species-based compilation of 50- and 30-splicing motifsshowed, to some extent, lineage-specific conservation ineach splicing motif. Compilation of the entire intron setpermitted prediction of the consensus sequences of splicingsignal motifs in legumes, AYGWGTABABGH and TVNC/TAGGHTV for the 50SS and 30SS, respectively. Interestingly,these consensus motifs are very similar to the correspondinggenome-wide splicing signals of two modelsystems, Arabidopsis and rice. This result suggests conservationof pre-mRNA splicing mechanism occurring inhigher plants. Multiple alignments of CALTL intronsdemonstrated that the BP-30SS region was relatively moreconserved than the 50SS-BP region. We speculate thatlength of the BP-30SS region needs to be retained for theinteraction with U2AF protein. Phylogenetic analysisdemonstrates that each of three splicing motifs is not onlyphylogenetically informative, but also relevant to evolutionarydivergence of species. This result suggests that thesplice signal sequences would be a useful tool for themolecular phylogenetic analysis. We also anticipate thatgene-targeted amplification in multiple genomes, describedin this study, would facilitate studies on intron-locatedfunctional elements involved in gene expressionregulations.