18
Oct 13

Mantis Shrimp

Published: 10-18-13

Since two of the other blogs in this group already deal with music related topics, I decided to switch my music post to a science/biology post about interesting animals.  This week’s animal is the Mantis Shrimp.

http://upload.wikimedia.org/wikipedia/commons/3/39/OdontodactylusScyllarus2.jpg

What’s so interesting about the mantis shrimp, you ask?  Well first of all, they have the most complex eyes in the animal kingdom.  Human eyes are receptive to three colors: red, blue, and green.  All colors we see are some combination of those three colors.  Mantis shrimps, on the other hand, have not three, not five, not nine, but twelve different color receptors.  In addition to color sensitivity, the mantis shrimp has unsurpassed depth perception.  Why does the mantis shrimp need such complex eyes?  To catch its prey, of course!  This is where the mantis shrimp gets even more interesting.

See those two pinkish club-like things?  That’s what the mantis shrimp uses to kill its prey.  Those clubs shoot out at 80 kilometers per hour and are hard enough to smash through almost anything.  A strike from a mantis shrimp can generate up to 1,500 newtons of force.  To put that into perspective, that’s about the same amount of force a falling 340 pound object would create.  Since they strike so fast, their appendages cause such a large change in pressure that the water around boils in a process known as supercavitation.  A shockwave forms and the water can reach temperatures up to several thousand kelvin in addition to supercavitation.  The mantis shrimp uses this power to smash through the shells of crabs, clams, and other molluscs as well as some unlucky fish.

The mantis shrimp can grow up to a foot in length and live mainly in shallow tropical marine habitats.  If you’re wondering why you haven’t seen these in any aquariums is because of the club-like-things we discussed before.  Mantis shrimp may end up killing most of the other animals living in its tank.  They are also known to be able to break through the aquarium glass with their clubs.  I’ve attached a video and an infographic by The Oatmeal in my sources if you want to learn more about the mantis shrimp.  For my next animal blog post I’ll try to find a furry-er animal since everyone likes those.

Sources:

http://en.wikipedia.org/wiki/Mantis_shrimp

http://theoatmeal.com/comics/mantis_shrimp

http://news.sciencemag.org/earth/2012/06/mantis-shrimp-smash


16
Oct 13

Obama addresses the shutdown

On October 5th, Obama gave a weekly address concerning the government shutdown.  Since the government shutdown started on October first, this timing of this speech is appropriate.  I should also note that being the president is enough ethos for any speech or event in the government.  In this speech he urged congressmen to come together and reach an agreement.  By doing so, Obama is fulfilling his civic duty as president to work out issues between the two parties.  Obama started by reading two letters out of the thousands he received regarding the government shutdown.  He does this for two reasons.  First, by reading the letters of average Americans, he wants to show the American people that he is listening to their troubles and that he can connect with them.  Second, he appeals to pathos since the letters highlight the struggles of numerous Americans affected by the government shutdown.  The excerpt of the letter from Kelly Mumper read

“Our Head Start agency…was forced to stop providing services on October 1st for over 770 children, and 175 staff were furloughed.  I am extremely concerned for the welfare of these children.  There are parents who work and who attend school.  Where are they leaving their children…is it a safe environment…are [they] getting the food that they receive at their Head Start program?”

This letter showcases the emotional and financial distress many Americans are feeling due to the shutdown.  Again, Obama does this to call upon the emotional side of the senators and house members to work together and end the shutdown.  Obama read a second letter from Julia Pruden which stated,

“We put in an offer to purchase a home this weekend, and it was accepted…if funding does not go through, our chances of the American Dream [are] down the drain…We have worked really hard to get our credit to be acceptable to purchase a home…if it weren’t for the direct lending program provided by the USDA, we would not qualify to buy the home we found.”

This excerpt used key phrases such as “…our chances of the American Dream [are] down the drain…”

http://i.huffpost.com/gen/1365230/thumbs/o-OBAMA-GOVERNMENT-SHUTDOWN-facebook.jpg

Obama acknowledges his civic duty later in his speech.  He said,”These are our fellow Americans.  These are the people who sent us here to serve.”  Obama recognizes that the only reason why he is the president is because people voted for him.  He also says this to remind the congressmen of their civic duty and who they are supposed to represent.  Obama then uses reasoning to persuade the congressmen to end the shutdown (although this might not have worked since congressmen aren’t known to be rational).

“…there’s only one way out of this reckless and damaging shutdown: pass a budget that funds our government, with no partisan strings attached.  The Senate has already done this.  And there are enough Republican and Democratic votes in the House of Representatives willing to do the same, and end this shutdown immediately.  But the far right of the Republican Party won’t let Speaker John Boehner give that bill a yes-or-no vote.”

Obama proposes a straightforward plan which is to “pass a budget that funds our government, with no partisan strings attached.”  He then makes a comparison which would resonate with many of the people furloughed by the shutdown.  He said “The American people don’t get to demand ransom in exchange for doing their job. Neither does Congress….That’s not how our democracy is supposed to work.”

Obama does a good job fulfilling his civic duty as well as reminding the congressmen of their duty.  In his speech he utilizes the three modes of persuasion as well as kairos to deliver an effective speech.

Edit: I wrote this on 10/16 so by the time you read this, the government would have reopened.

Sources:

http://www.whitehouse.gov/the-press-office/2013/10/04/weekly-address-end-government-shutdown

http://wics.com/news/features/shutdown/images/shutdown_stopimg.jpg

http://i.huffpost.com/gen/1365230/thumbs/o-OBAMA-GOVERNMENT-SHUTDOWN-facebook.jpg


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