CPLUOS Astrophysics team meeting

Asia/Seoul
물리학과

물리학과

Zoom Meeting https://uos-ac-kr.zoom.us/j/8264902652 Meeting ID: 826 490 2652
Description

https://uos-ac-kr.zoom.us/j/8264902652

    • 16:30 17:45
      COSMOLOGY
      • 16:30
        Dr.Sangnam Park's Report - FDM_Offset 15m
        Speaker: Sangnam Park
      • 16:45
        Hyeonmo's report - CDM Halo Evolution for Gadget2 Simulation 15m
        Speaker: Hyeonmo Koo (University of Seoul)
      • 17:00
        Young's report. FoF and MST algorithm 15m
        Speaker: Young Ju
      • 17:15
        CHOA(Cosmology of High-Order Statistics) 15m
        Speaker: Sumi Kim (University of Seoul)
      • 17:30
        Dr.Sabiu's Report - Higher Order Statistics 15m
        Speaker: Dr Cristiano Sabiu (University of Seoul)
        • Estimating the General N-point Statistics
          • Query for N-point
            • All 'pairs' (w/ distances) are precomputed.
            • N-point exact counting.
            • I.e. No approximation
            • The majority of the time is taken in binning in high-dimension.
            • N(r_(1-2)) = Fast binning! Combinitronics(we know all the combinations!)
            • N(r_(3-4)) = Slower binning Need to search the database
          • Graph Query (Disconnected Part)
            • To bin the N-point measurement we need the distance between disconnected galaxies (point).
            • Database Entry for Galaxy 265
              • (Distance, Unique ID)
                • (13, 342)
                • (17, 620)
                • (14, 3675) → New method :  Divide-and-Conquer
                • (..., ...)
                • (7, 13465)
            • Generative Pre-trained Transformer 3 (GPT-3) is an autoregressive language model that uses deep learning  to produce human-like text.
            • GPT-3's full version has a capacity of 175 billion machine learning parameters (10x more than any previous model).
            • Back to the N-points : How much faster can we make this?
              • When the number of data points reaches 500000, the speed of new is about twice as fast as the old.
    • 17:45 17:55
      Discussion 10m