Monthly Archives: April 2015

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).

Contact us:

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

John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin


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Episode 13 – “One of my best friends is a poet” Phoebe Cohen

This week we are joined by paleontologist Dr. Phoebe Cohen (@PhoebeFossil) from Williams. She studies microscopic single-cell fossils from before there were animals.

Useful Apps/Programs

Fun Paper Friday

This week we read about the nutrition of gut bacteria in a baby and how it can influence their behavior. You can also follow the author on Twitter: @Mammals_Suck

Allen-Blevins, C. R., Sela, D. A., & Hinde, K. (2015). Milk Bioactives May Manipulate Microbes to Mediate Parent-Offspring Conflict. Evolution, Medicine, and Public Health, eov007. http://doi.org/10.1093/emph/eov007

Contact us:

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


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Episode 11 – “It was windy”

This week we talk about another branch of earth science, meteorology. We discuss the upcoming severe weather season and Shannon’s close call with a tornadic storm. Also updates on past stories, feedback, and fun paper friday!

Kelvin-Helmholtz Instability

Story Updates and Feedback

Severe Weather

  • We encourge you to learn your way around and use the National Weather Service webpage.
  • Also checkout the National Severe Storms Laboratory and the Storm Prediction Center.
  • For one of the most severe weather prone areas, Oklahoma, these three organizations are co-located in the National Weather Center
  • Communicating weather information, or an probabilistic information is actually really difficult.
  • Doing a hand analysis of data is still crucial to weather prediction. For example the analyst knows about isobar kinking.
  • Oklahoma Mesonet
  • Checkout the email “The Ticker” from the mesonet
  • Checkout if your local weather service office offers storm spotter training classes and get to know your branch meteorologist
  • John had a relevant blog post that talked about what an expert is and how important it is to know the fundamentals.
  • Have a disaster plan and know what to do during an emergency! This applies to field geology work just as much.

Fun Paper Friday

This week is April fools, so we have a laugh with the Journal Nature. This week we learn about the coming back of dragons and climate change.

Hamilton, A. J., May, R. M., & Waters, E. K. (2015). Zoology: Here be dragons. Nature, 1–2. doi:10.1038/520042a

Contact us:

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

John Leemanwww.johnrleeman.com@geo_leeman

Shannon Dulin@ShannonDulin


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