Category Archives: Uncategorized

Episode 208 – “It’s all just voltage”

This week we explore how does your data go from a physical thing to a digital representation.

Fun Paper Friday

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John Leeman

Shannon Dulin

 


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Episode 207 – “Baby little crystal faces”

This week it’s all about microscopic indications of impacts and some fun mineral names. We wrap up with a fun paper on making project acronyms!

Fun Paper Friday

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John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin

 


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Episode 206 – “The saddest of the breccias”

This week we continue to chat about impact events and the macroscopic evidence of them. We wrap up with a chat about primate sleep patterns.

Fun Paper Friday

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Episode 205 – “Mellon Baller to the Surface”

This week we start a series on impact crates and how to tell if you have one – turns out it’s a lot more complicated than you’d think! We’ll wrap up the show with an analysis of pocket sizes on men’s and women’s clothing.

Fun Paper Friday

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John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin

 


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Episode 203 – “Evian of Light”

This week we wrap up talking about magnetometers with the alkali vapor magnetometer – a strange optical instrument that is incredibly precise!

Fun Paper Friday

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John Leeman

Shannon Dulin

 


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Episode 201 – “Homogeneous Background” Fluxgate Magnetometers

 

This week it’s all about the fluxgate magnetometer – funny name, awesome instruments.

 

Fun Paper Friday

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John Leeman

Shannon Dulin

 


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Episode 26 – “Can I speak to your online librarian?” Top 10 Google Tips

Top 10 Google Search Tips

  • Use the tabs
  • Use quotes
  • Exclude results with –
  • Google Scholar
  • Broaden the scope of your search by removing words
  • Think like the person writing the article
  • Search for a filetype:
  • Use Google Books
  • Use the forums
  • Mine references and link lists

Other Links

Fun Paper Friday

Maher Al-Dayeh & Neal Evans. Acoustic imaging of thunder from rocket-triggered lightning. 2015 Joint Assembly of American and Canadian Geophysical Societies. Abstract # AS31A–07

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Showwww.dontpanicgeocast.com@dontpanicgeo – show@dontpanicgeocast.com

John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin


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Episode 16 – “We are scared” Nature Calls

This week John and Shannon discuss going outside and how important it is to our learning processes. Are we suffering from “nature deficit disorder”? We follow up the discussion with a #FunPaperFriday about playing outside.

Fun Paper Friday

Dyment, Janet E. “Green school grounds as sites for outdoor learning: Barriers and opportunities.” International Research in Geographical & Environmental Education 14.1 (2005): 28–45.

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Showwww.dontpanicgeocast.com@dontpanicgeo – show@dontpanicgeocast.com

John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin


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Episode 14 – “I basically need a holodeck”

Taking notes is an essential part of your job, no matter what you do. This week we discuss note taking strategies, supplies, and how we work. Also don’t miss out on a sticky #FunPaperFriday!

Note Taking Systems

Note Taking Tools

Digital vs. Analog

  • We can talk about the advantages and disadvantages of each forever.
  • Digital is re-workable (like lasso and move in penultimate).
  • Paper is easier to write/shade/make more detailed and elegant notes
  • Digital can embed media
  • Paper doesn’t crash or run out of battery
  • Digital can be backed up against loss

Digital

  • iPad
  • Apps to write or type (omnioutliner for example)
  • Smart pens like the Neo smartpen or the Livescribe
  • Apps on laptops

Analog

Fun Paper Friday

Did you know that the bug-on-windshield effect greatly impacts the fuel efficiency of an airliner? This week we read about some clever solutions to stop the waste of fuel and excessive, unnecessary carbon emissions.

Siochi, E. J., Smith, J. G., Wohl, C. J., Gardne, J. M., Penner, R. K., & Connell, J. W. Engineered Surfaces for Mitigation of Insect Residue Adhesion (pp. 1–15).

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Showwww.dontpanicgeocast.com@dontpanicgeo – show@dontpanicgeocast.com

John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin


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Episode 12 – “You want to filter out the ducks” Tides

Tides pull and deform the surface of the ocean and the surface of the Earth. This week we’ll take a quick tour of tidal forces, address some show feedback, and then talk about a revision on a classic physics problem.

Tides

  • Tides are a result of gravitational interaction of the Sun-Earth-Moon system, but are of course a factor on many other planets as well.
  • Gravity is the key to remember and that it varies linearly with mass, but with the inverse square of displacement.

Ocean Tides

  • The most familiar example is ocean tides. These are important for commerce, safety, and for sedimentary processes.
  • Sedimentary layers called tidal rythmites
  • Cool tide visualization from Calculated Images
  • General cycle is a flood tide raises water levels until high tide. Then an ebb tide takes water back out until low tide is reached. When the tidal stream stops and reverses it is a slack tide.
  • Generally occur with 24-hour or 12-hour period, can have a complex shape.
  • Another kind of clock, a tide clock, has been made to show this.
  • Spring tide has nothing to do with the season.
  • When planets are aligned, it’s called a syzygy. Word of the week.
  • A really nice mathematical introduction can be found here.

Tide Gauges

  • A pole with markings that we read off of
  • A float and weight on a pulley attached to a paper chart recorder
  • Pressure gauges or bubbler pressure measurement
  • Acoustic gauges or radar gauges (time of flight)
  • There is a whole mess of datums and standards that go into this, but let’s not go there today!
  • And rocks of course!!

Solid Earth Tide

  • The same forceings as ocean tides, but we are actually moving the surface of the planet here. Very important for GPS and scientific measurements. Large particle accelerators actually compensate for their deformation.
  • The largest displacements are around 55 cm!
  • Needed to explain the Earth’s nutation
  • Lunar Tidal Heating

Tidal Locking

  • We can only see one side of the moon because it is tidally locked. It rotates at the same rate that it orbits the Earth.
  • Checkout the Minute Earth video on tidal locking!

Feedback/Followup

Fun Paper Friday

We’ve all had to solve the classic physics problem of what would happen if you dug a tunnel through the center of the Earth and jumped in. The classic answer has been that you’ll move like a damped oscillator and that your fall will take about 42 minutes. By improving some of the assumptions that are used, that answer has been improved.

Klotz, A. R. (2015). The gravity tunnel in a non-uniform Earth. American Journal of Physics, 83(3), 231–237. doi:10.1119/1.4898780

Contact us:

Showwww.dontpanicgeocast.com@dontpanicgeo – show@dontpanicgeocast.com

John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin


New episode!

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