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  • Who We Are
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  • What We Do
    • Human-Powered Submarines >
      • Maryland Mako 2019
      • Rubber Duckie 2017
      • Nautilus 2015
      • IL Calamaro 2013
    • Remotely Operated Vehicles (ROVs) >
      • Sea Perch >
        • Blog
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      • Arduino
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Nautilus

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Science fair successes!

3/29/2015

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Yesterday was the Charles County Public Schools Science Fair.  The sub team had three winners!  Congratulations to Zahra, 3rd Grade, for her first in Physics; Ava, Overall Elementary, for her second place in Environmental Science; and Gavin, Junior Level, for his third place in Energy and Transportation.  Hoorah!
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ISR participation helps for college!

3/16/2015

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It's almost spring.  To college-bound high school seniors, it's the time of year when college acceptances (or not) start coming in.  One of our team members, Lydia, who helped with the last submarine got accepted to Caltech, one of the top technical schools in the US.  We all knew Lydia was brilliant when, at age 15, she did all the calculus for the submarine project, but it's nice to see such a distinguished school recognize her gifts.  When she went to Caltech for a visit, after having been accepted to the school, several of the staff told her they had noted her work on Il Calamaro, our 2013 ISR entry, and that it was a PLUS on her resume.  Congratulations, Lydia!
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Lydia cuts a hole for the Il Calamaro emergency strobe light.
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Lydia shows off one of the trim weights she sewed from a chicken feed bag.
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hull work party

3/12/2015

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Today's focus was cutting pieces of wood for the fixture we will be building on Saturday.  We reviewed safety procedures and got to work.  What a great way to learn about fractions!  The biggest problem we had was getting the work crew here!  Poplar Hill Road, a dirt road, is suffering from the slow snow melt; today it looked like a mud-wrestling pit.  Cars stopped at the top of the hill and the kids slogged through the mud.  It was definitely a "leave your boots at the door" kind of day.
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A few interesting facts

3/3/2015

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Our submarine is named Nautilus.  In a future post, we can look at the first nuclear submarine, Nautilus, and possibly Jules Verne's Nautilus, but in today's post, let's learn about the beautiful  sea creature, the nautilus.  Did you know that the chambered nautilus:
  1. Is a member of the cephalopod family, along with the octopus, the squid and cuttlefish?
  2. Adds chambers to its shell as it grows?
  3. Regulates buoyancy by changing the ratio of gas (argon-nitrogen mix) to saline solution in its chambers?
  4. Can live 15 to 20 years?
  5. Retracts into its shell when threatened?
  6. Has up to 90 tentacles (but no suction cups)?
  7. Lives in an area stretching from Andaman Sea to Fiji and from southern Japan to the Great Barrier Reef?
  8. Are “living fossils”, relatives of the ammonoids whose fossils date back 500 million years?
  9. Are noctural feeders, living by day at around 1500 ft and rising at night to about 300 ft?
  10. Has a geometry that sometimes corresponds to the Fibonacci sequence, but is always a logarithmic spiral? 
Science in nature is a wondrous thing.  Here's a good article about the Fibonacci sequence from Temple University's Dan Reich:

fibonacci
 
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And here we can see Bernoulli's tombstone from Basel Minster church.  The church was originally a Catholic cathedral, but became part of the Swiss Reformed Church in 1529. Of note here is the logarithmic spiral that Bernoulli requested be put on his tombstone.  The stonemason took a little artistic license and carved an Archimedean spiral, but the intent was there.  Latin around the spiral reads,  "EUDEM MUTATA RESURGO" or "the same, yet changed, I rise again."

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Detail from Bernoulli's tombstone
And once again the value of the International Submarine Races shines forth.  Not only can our team learn about engineering science, but we can learn about biology, art, history, mathematics, Latin, geography and more.  I'm very thankful for the sponsors of ISR, the Foundation for Underwater Research and Education.
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    AuthorS

    Mrs. Carts, hull advisor
    Abby, propulsion & steering teams

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