• 제목/요약/키워드: biological

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Biological Feature Selection and Disease Gene Identification using New Stepwise Random Forests

  • Hwang, Wook-Yeon
    • Industrial Engineering and Management Systems
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    • 제16권1호
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    • pp.64-79
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    • 2017
  • Identifying disease genes from human genome is a critical task in biomedical research. Important biological features to distinguish the disease genes from the non-disease genes have been mainly selected based on traditional feature selection approaches. However, the traditional feature selection approaches unnecessarily consider many unimportant biological features. As a result, although some of the existing classification techniques have been applied to disease gene identification, the prediction performance was not satisfactory. A small set of the most important biological features can enhance the accuracy of disease gene identification, as well as provide potentially useful knowledge for biologists or clinicians, who can further investigate the selected biological features as well as the potential disease genes. In this paper, we propose a new stepwise random forests (SRF) approach for biological feature selection and disease gene identification. The SRF approach consists of two stages. In the first stage, only important biological features are iteratively selected in a forward selection manner based on one-dimensional random forest regression, where the updated residual vector is considered as the current response vector. We can then determine a small set of important biological features. In the second stage, random forests classification with regard to the selected biological features is applied to identify disease genes. Our extensive experiments show that the proposed SRF approach outperforms the existing feature selection and classification techniques in terms of biological feature selection and disease gene identification.

New Records of Aspergillus allahabadii and Penicillium sizovae from Crop Field Soil in Korea

  • Tagele, Setu Bazie;Adhikari, Mahesh;Gurung, Sun Kumar;Lee, Hyun Gu;Kim, Sang Woo;Kim, Hyun Seung;Ju, Han Jun;Gwon, Byeong Heon;Kosol, San;Lee, Hyang Burm;Lee, Youn Su
    • Mycobiology
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    • 제46권4호
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    • pp.297-304
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    • 2018
  • Two new records of Trichocomaceae, namely Aspergillus allahabadii and Penicillium sizovae, were isolated in 2016 during a survey of fungal diversity in different crop fields locations in Gyeongnam, Korea. These species were identified based on morphological characters and phylogenetic analysis using internal transcribed spacer region and ${\beta}-tubulin$-encoding gene sequence data. A. allahabadii and P. sizovae have not yet been reported in Korea. Thus, this is the first report of these species in Korea, and their descriptions as well as details of their morphological characters are presented.

Genome analysis of Leuconostoc kimhii IMSNU11154

  • Chun, Jong-Sik;Oh, Hyun-Myung;Cho, Yong-Joon;Jeong, Ga-Jin;Kang, Sa-Ouk;Roe, Jung-Hye
    • 한국유전체학회:학술대회논문집
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    • 한국유전체학회 2006년도 The 15th Korean Genome Organization Conference KOGO 2006 Annual Meeting
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    • pp.57-57
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    • 2006
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Soil Metagenome to Explore Soil Microbial Resources

  • Lee, Seon-Woo;Lim, He-Kyoung;Kim, Sung-Eun;Choi, Gyung-Ja;Kim, Jin-Cheol;Choi, Kwang-Yun
    • 한국미생물생명공학회:학술대회논문집
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    • 한국미생물생명공학회 2003년도 2003 Annual Meeting, BioExhibition and International Symposium
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    • pp.20-23
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    • 2003
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