Wednesday, April 27, 2011

Holy Puck!

A hockey puck is about as simple as it gets.  A hunk of vulcanized rubber 3 inches in diameter, 1 inch think and approximately 6 ounces.  The pucks are frozen before each game and in an ice-cooler in the penalty box during the game.  By lowering the temperature of the pucks glide is increased and the amount of bounce is decreased.  A puck is an extremely durable piece of equipment but earlier this year someone managed the unthinkable.  Check out this video:
 
In 1996 Fox Sports attempted to revolutionize the game of hockey for viewers by introducing a new puck.  Inside the puck was a computer board as well as several infrared emitters.  Pin-sized holes are drilled though the puck to allow the infrared waves to be emitted.  Several receptors were placed around the rink and connected to the "Puck Truck" outside of the arena by fiberoptics.  Using the read-outs of the receptors and linking them with the broadcast Fox was able to show the game on tv with a neon blue halo highlighting the puck.  When the puck was shot a red tail was shown coming from the puck.  A read-out of the speed of the shot was also shown throughout the broadcast.  The idea was that newcomers to the sport were anable to follow the small, speedy puck on tv and this would increase enjoyment in watching the game.  The FoxTrax puck was only around for a year or two before dying out.

Check out this video to see how it worked:
 


Sean

Snapped Twigs

It's playoff season baby!  As many of you may have realized by now I am a huge hockey fan.  At this time of the year the TV at our place is generally frozen on Versus in the evening in order to watch the back-to-back playoff action.  When there isn't a game on, the TV lends its screen to the Xbox where we battle over friendly games of NHL '11.  Any of you who follow hockey or perhaps have played the recent EA Sports video games may have noticed that the frequency of broken sticks has risen greatly in the recent decade.  The hockey stick has gone through many changes throughout the 150 odd years that organized hockey has been played.

In the early years hockey players generally crafted their own sticks by cutting down a hickory or alder sapling with the branches attached and then filing down the wood to create the desired shape.  In the 1880's a Montreal company began fabricating wooden hockey sticks. These preliminary sticks were short with a rounded blade.  As the game evolved the blade became longer and straighter to increase control of the puck and the shaft became longer eliminating the need to hunch over.  The biggest jump in hockey stick technology came in the 1920's when a company started producing the first two piece hockey sticks.  By separating the blade and shaft during manufacturing the company was able to experiment with blade designs making them thinner and longer greatly increasing puck control.  The next step was adding the curve in the blade.  The tale goes that professional hockey player Stan Mikita, frustrated at a practice, attempted to break his stick in the door of the bench.  Instead of shattering the blade, the wood bent and what resulted was an un-before seen increase in shot power and accuracy.  In the late 70's to early 80's manufactures investigated using aluminum as a material.  The sticks were very heavy and didn't have the "feel" that hockey players wanted.  Instead of a one-piece aluminum stick a two-piece stick with an aluminum shaft and a wooden blade was introduced.  This stick became very popular in the late 80's and early 90's.  In fact my very first hockey stick was an aluminum shafted "Wayne Gretzky" edition.  Moving toward the new millennium several companies introduced a one-piece carbon composite stick.  The main material involved is graphite but plenty of materials including binders and epoxy are used. 

These new one-piece composite sticks have increased velocity as well as accuracy and have taken over the hockey world.  The wooden stick is all but an antique these days in the NHL.  I can probably count the amount of players that still use a wooden stick on one hand.  If anyone caught the San Jose - L.A series they may have noticed that Ryan Smyth of the Kings using a wooden stick.  Up until the last year Colorado's own Paul Statsny used a wooden stick.  The biggest disadvantage of the composite one-piece stick is that they seem to break more often.  A guy like Ryan Smyth, who spends most of his time in front of the opposition's net harassing the goalie, takes a lot of punishment from opposing defenseman.  A stick that won't break is vital to this type of player.  Although they seem to have been phased out I personally feel that wooden sticks should still have a place in the NHL.  There have been countless time where I have seen a defensemen wind up for a shot in the attacking zone only to have his stick shatter all the while sending an opposing player on a breakaway.  I think that it would be wise for gritty players like Ryan Smyth and perhaps stay-at-home type defensemen to use wooden sticks.  Although they may lose a small amount of velocity and accuracy on their shots these type of players do not rely on the big shot nearly as often and a broken stick can often be detrimental in giving up an important goal.

Sean

 

Wednesday, April 20, 2011

A Swimsuit That's Scared of Water?

Hydrophobic is a word derived from the latin words hydro (water) and phobos (fear).  Scientists from the Hohenstein Institute in Germany have recently released a swimsuit that uses microbubble technology rendering the fabric hydrophobic. Basically what this means is that tiny air bubbles are trapped between the threads of the material.  These tiny air bubbles create a protective layer that does not allow the water to penetrate the suit and effectively lowers the friction between the suit and the water.  The following diagram explains how this is achieved.
 
Although I am more of a physical metallurgy student I have also taken classes with Hydrometallurgy.   A common separation method in hydrometallurgy is flotation. The way this works is that hydrophobic material attaches to air bubbles and floats to the top while the hydrophilic material sinks to the bottom.  The reason I bring this up is I was thinking.... If I bought a pair of these swim trunks would I float better.  I really think that it would be more fashionable than the water wings I currently must wear to go in the deep end.  I'm just kidding.  But seriously...I swim like a rock!

Sean

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