1. www.hornsrev.dk

2. Natural Structures vs. Engineered Structures cave to room tree trunk to column tree branch to beam spider web to truss beaver dam to dam turtle shell to portable home honeycomb to cubicles beehive to dome wwwwww.christusrex.org www.mwphglnj.org www.visualparadox.com www.merkmawas.de philg@mit.edu ningalookayakadventures.com www.hprcc.unl.edu www.ontariowildflower.com Unitedsteelsystems.com www.alanbauer.com www.ppdl.purdue.eduwww.megasc.com www.magnetictimes.com www.woodmagazine.com www.discoverawatershed.orgwww.cs.huji.ac.il

3. Stretching (Tension) - Failure Squeezing (Compression) - Failure Applied Loads on Structures Compression Tension Neutral Axis

4. Bridge Failure Due to Wind Tacoma Narrows Bridge Ed Elliott The Camera Shop 1007 Pacific Ave., Tacoma, Washington 98402 Click the picture to view the film clip.

5. Types of Wind Turbines Drag Savonius Horizontal Early Dutch Vertical Darrieus Horizontal Modern 2-Blade Horizontal Modern 3-Blade www.nvweb.de norfolkskyview.flyer.co.ukcompositesworld.com www.energoclub.it koti.mbnet.fii Horizontal Farm Windmill www.srph.tamushsc.edu

6. Turbine Failure Rotor Damage Tower Buckling

7. Bushland, Texas