SKI TRIP - MOUNTAIN CREEK, NJ
February 18, 2005
click on the images to enlarge

Note:all comments given about the pictures are TRUE. This is not the Department main web site, but a site maintained by Prof. Ling for pleasure.

After Arrival

Attendance was taken by Prof. Vaicaitis and Prof. Betti
- did I miss your picture?
- one ticket extra (perhaps we should sell it for 50% discount near the parking place)

Lab Session Started...

a fully armed, true professional skier	Prof. Betti was available to take picture with anyone. You have to pay directly to the photographer	first-time skier(s)	another first-time skier	Prof. Vaicaitis showed the beginners on how to ski
after the 1-min "intensive" lecture, lab session started	the second group is coming...	should we go ahead or we wait for Prof. Vaicaitis??	Prof. Vaicaitis was nearby. He came back to take them to the steepest slope	Sorry, Prof. Ling. I want my own picture!

Professors who need a big raise

we need the raise for our annual spending here

note the difference in Prof. Vaicaitis today - no glasses. He sees well without glasses only in the presence of snow

Prof. Culligan, I remembered you were  in Perth (nothing like Mt Creek?) Prof. Smyth is a cross-country skier

Prof. Betti is again available to take picture. It is "free" for the professors

Prof. Meyer decided to look after the students today since the trip is related to the Senior Design

Waiting for the food!

1'm already 21 years old!

Burger, Fish Fillet, Chicken Wings, and what else?
.... but to be honest, the best food can only be available from Prof. Betti's mom

		Thanks for the interesting information. Prof. Betti and I will find out the answer soon.
Kampai! Congratulation on your 21st Birthday!	This was done at the request of Prof. Ling	Prof. Betti's Retaining Wall that we discussed. Only the person who carries the blood and DNA of the Romans can do it....

In order to encourgae more students to come next year, we should let everyone practise skiing in Carleton Lab
Agreement with some students:  if you will come to Carleton Lounge by 10:30 am, you will have coffee with the professors

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Finally, a question on "Dirt" Mechanics. This is for Prof. Meyer's Senior Design class.

1. Why these ski tools are of different sizes for the adults and the kids, for you and me?
The answer is related to bearing capacity problem. The snow is like loose sand and its strength is very low (do a direct shear test to find out how many degrees it is). Then, we calculate  the bearing capacity using, for example, Terzaghi's equation.
To avoid foundation failure, i.e., punching failure in this case, we need to lower down the stress acting on the snow (stress=your weight/area) to an acceptable value. May be you want a factor of safety equal to 3.0 as well. We are heavier than the kids, so we need a larger area compared to them.
Next year, the right size will be determined by doing a bearing capacity analysis.

2. Why we don't use these ski tools for skating?
Ice is stronger which means the angle of friction is much higher than that of snow. As a result, it has a larger bearing capacity compared to snow. We can afford a much smaller area for the skate boots (like a blade).