Talk the Second Matthew Turk Questions Collaborations Future - - PowerPoint PPT Presentation

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Talk the Second Matthew Turk Questions Collaborations Future - - PowerPoint PPT Presentation

Apr 06, 2024 290 likes •1.08k views

Talk the Second Matthew Turk Questions Collaborations Future directions yt Survival Guide Questions Collaborations Future directions yt Survival Guide Kinds of questions What can we ask of our data? Three basic

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SLIDE 1

Talk the Second

Matthew Turk

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SLIDE 2 ◮ Questions ◮ Collaborations ◮ Future directions ◮ yt Survival Guide
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SLIDE 3 ◮ Questions ◮ Collaborations ◮ Future directions ◮ yt Survival Guide
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SLIDE 4

Kinds of questions

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What can we ask of our data?

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Three basic categories:

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SLIDE 7 ◮ Simple questions ◮ Hard questions ◮ Impossible questions
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SLIDE 8 ◮ Simple questions ◮ Hard questions ◮ Impossible questions
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SLIDE 9

Asking a (Simple) Question

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The data and the tools already exist.

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Steps

  • 1. Ask the physical question
  • 2. Formulate this question in terms of data
  • 3. Position the question in terms of tools
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Requires an understanding of availability and methodology.

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(review of PopIII stars)

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Two Questions:

  • 1. Where are the hot bubbles located in

my simulations?

  • 2. What is the morphology of the

fragmenting region?

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SLIDE 15

Hot Bubbles

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SLIDE 16
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SLIDE 17 ◮ The gas in some regions seems to be

hotter than others

◮ How do I identify hot regions using their

properties?

◮ How do I persuade yt to tell me about

those regions?

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SLIDE 18

“One red thread.”

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Morphology

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SLIDE 21

800 AU

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SLIDE 22 ◮ The molecular cloud has split in two ◮ At what densities do the ◮ How do I persuade yt to tell me about

those regions?

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10-16 g/cc

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10-14 g/cc

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10-12 g/cc

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Asking a (Hard) Question

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Steps

  • 1. Ask the physical question
  • 2. Formulate this question in terms of data
  • 3. Ask why existing tools do not satisfy this

answer

  • 4. Iterate on algorithms and

implementations

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SLIDE 30 ◮ The cloud has broken up! ◮ How do I identify one region that’s not

connected to another?

◮ The clouds it broke into aren’t regular

shapes.

◮ Let’s try to identify connected sets.
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SLIDE 31

Level Sets

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SLIDE 32 ◮ Identify connected sets in grids ◮ Connect sets across grids ◮ Coalesce
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Impossible Questions

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“All those moments will be lost in time... Like tears in rain...” – Roy Batty

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SLIDE 35

Design questions in advance.

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In situ can only sip from the firehose.

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On Disc → In-situ

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SLIDE 38 ◮ Questions ◮ Collaborations ◮ Future directions ◮ yt Survival Guide
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SLIDE 39

Project Collaborations

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“Co-opetition”

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What has worked for yt?

◮ Communication ◮ Investment ◮ Rewards ◮ Letting Go
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2

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Bifurcate Communication

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2

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SLIDE 45
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SLIDE 46

2

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SLIDE 47

Investment

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SLIDE 48

Investment

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(Show 5 Mpc density movie)

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Case Study: Volume Rendering

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Meeting a need.

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(Pragmatic development)

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Timeline

  • 1. Late 2009: Developed stacked cutting

planes

  • 2. Late 2009: Homogenized Volumes
  • 3. Early 2010: Image plane parallelism
  • 4. Mid 2010: Multivariate transfer functions
  • 5. Early 2011: kD-tree
  • 6. Early 2012: Threading
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As responsibility and pride grew, development blossomed as well.

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Rewards

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De facto and de jure

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De facto rewards

◮ Utilization of developed tools ◮ Respect from community ◮ Involvement in projects ◮ Invitations to speak
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De jure rewards

◮ Funding ◮ Additional publications ◮ Citations
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The reward structure in astrophysics does not favor builders.

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Letting Go

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Too much control leads to smothering growth.

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Allow projects to pass between people.

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Encourage pride, but not ownership.

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SLIDE 64 ◮ Questions ◮ Collaborations ◮ Future directions ◮ yt Survival Guide
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Geometry

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Generic geometric selection of points, cells and data

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IO Library

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Regularization occurs inside yt natively. Serialize this to disk.

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Tighter Integration

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Initialization

sim = NewMesh([64, 64, 64]) sim.add_fluid("density") sim.add_fluid("hydrogen", color=True, frac=0.76) sim.set_temperature(100) sim.set_density(1e-3) sphere = add_sphere([0.5, 0.5, 0.5], 0.1) sphere.set_temperature(1000) sphere.set_density(1e0) sim.run()

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Simulation Control

sim.add_module("hydro_HLLC") sim.add_module("chemistry_high_density") sim.run()

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Collaboration

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hub.yt-project.org

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Better Outreach

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SLIDE 76
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SLIDE 77 ◮ Questions ◮ Collaborations ◮ Future directions ◮ yt Survival Guide
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Survival Guide

http://yt-project.org/: Docs, bug reports, help yt help yt plot yt upload_image yt serve yt mapserver