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Speaker: Dr. Faedi Loulidi, Laboratoire de Physique Theorique.
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Abstract
Population genetics and phylogenetics are two main subfields of evolutionary genetics. The former investigates the genetic variations among populations within a species while the latter focuses on reconstructing phylogeny of many species using genetic data. In this presentation, I will present my previous work on the population genetics of an alpine ground beetle, Nebria ingens complex, in the Sierra Nevada in California and my current work on the deep evolutionary history of species radiation of Lepidoptera. In the alpine ground beetle study, I used genome-wide variants to characterize the population structure and demographic history. I found that the glacial refugia was in the low-elevation drainage basins of Sierra Nevada during the last glacial maximum, followed by the postglacial recolonization to the current high-altitude alpine zone. I also used genome-wide association approaches to identify the genes putatively associated with the postglacial elevational range shift, local adaptation to the heterogeneous environments, and the morphological variations. For the study of Lepidoptera species radiation, I use published high-quality lepidopteran genomes to explore the genomic evidence related to rapid diversification of modern lepidopteran lineages. The preliminary results suggest that the gene evolution involving host plant detection, phytocompound detoxification, and protein digestion play crucial roles in species diversification along with the Angiosperm radiation. Finally, I will provide my personal perspective on connecting population genetics (microevolution) and phylogenetics (macroevolution) for a more thorough understanding of evolutionary processes.
About Dr. Yi-Ming Weng:
Yi-Ming was born and brought up in Taiwan. He graduated from National Chung-Hsing University for bachelor’s and master’s degrees in Entomology department. He is interested in insect biodiversity and evolution in general. For his master thesis, he studied phylogeography of alpine ground beetles in Taiwan, looking for sharing evolutionary history between the alpine ground beetle species with similar ecological niche and geographical distribution. Yi-Ming started his PhD carrier in the University of Wisconsin-Madison in 2017. He worked with Professor Sean Schoville to further study the evolutionary history of alpine ground beetle from the Sierra Nevada in California using genomic data. By the time he started to develop his skillsets in bioinformatics and genomics. Now Yi-Ming is working with Professor Akito Kawahara in the University of Florida as a postdoctoral researcher studying evolutionary genomics of Lepidoptera.
Despite Yi-Ming has been working mostly with computers for his bioinformatics analyses, he is most interested in outdoor activities and direct observation of insects. He believes that good biological questions usually come from the field, and stepping out to touch the insects gets the best inspiration.
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Speaker 1:Mr. Pengfei HE, Ph. D. Student, Michigan State University
Title: Probabilistic Categorical Adversarial Attack
Speaker 2:Mr. Yuki TAKEZAWA, Ph.D. Student, Kyoto University
Title: Beyond Exponential Graph: Communication-Efficient Topologies for Decentralized Learning via Finite-time Convergence
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Prof. Colin Jackson, Research School of Chemistry, Australian National University
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[Speaker] Dr. Fernando Ángel Fernández-Álvarez, Institute of Marine Sciences (ICM), CSIC, Spain
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QG group meeting.
Speaker: Slava Lysov.
Title: Higher Topological Quantum Mechanics.
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* Dr.Yong Keun Park, Physics Department of KAIST, South Korea
* Language: English (No interpretation)
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We are inviting Dr. Shun Satoh from Kyoto University who calls himself as a "Fish Maniac" in his blog.For his details please check the link below. https://symphysodondiscus.wixsite.com/website-1/blank-3
Date: May 29th(Mon)
Time: 15:00* -
Room: C209 (Center Bldg)
*The start time has been updated as of May 19th. sorry for the inconvenience.
Zoom Link:
https://oist.zoom.us/j/94360778822?pwd=ZDlPZFY2d3luQWovcUdLZ1lvbGdpQT09
Meeting ID: 943 6077 8822
Passcode: 705537
If you have any questions, please contact egu@oist.jp.
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Dr. Hirokazu Maruoka, Yukawa Institute for Theoretical Physics, Kyoto University.
Language: English.
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Abstract: It is well-known that functions in critical Sobolev spaces embed into the space of functions of bounded mean oscillation (BMO) originating in the work of John and Nirenberg. Less well-known is the fact that they actually embed into BMO on subspaces of every smaller dimension. In this talk we introduce a class of spaces which are finer targets of these critical Sobolev embeddings than BMO that capture this phenomena, which we term beta-dimensional BMO. Interestingly, these spaces also gives an answer to the question of which BMO functions admit restrictions in BMO of subspaces. The key tool is a capacitary analogue of the John-Nirenberg inequality for the Hausdorff content, obtained recently in a joint work with You-Wei Chen.