Those funny codes

I have posted the quiz grading codes in the same file that holds the class notes. Feel free to email me or come by my office hours with any questions about the quiz.

homework for Thursday

Here's the list of problems. Pick three, and for each of the three, choose a primary function (PF) and make a simple TOP model. What is the main tool? Auxiliary tool? Are there cases when the tool shouldn't be designated as main or auxiliary?

We'll have you at the board Thursday to draw and explain your models.

1. A folding director’s chair has a canvas seat and back that are comfortable but deteriorate in sunlight.

2. A paperclip is easy to put on to a few sheets of paper, but slips off too easily.

3. Books on a bookcase are in view and accessible, but accumulate dust.

4. The battery in a cordless phone suffers a reduced lifespan when the handset is left in the cradle before the battery is completely discharged.

5. A towel rack can be mounted into drywall easily, but can pull out under load, damaging the drywall.

6. Streetlight bulbs are hard to replace when they burn out, because they are mounted so far above the ground.

7. Patches to Socorro potholes are usually not level with the surrounding road.

8. Using Socorro water in a coffee maker leads to mineral deposits and arsenic ingestion, but using bottled (reverse-osmosis) water leaves the coffee with a flat and uninteresting taste.

9. Most pens’ ink smears when a left-hander is writing.

10. Draining swamp coolers at the end of the summer commonly leaves a large hard water stain on a roof.

11. The windows high up on the front of the Fidel Center are difficult to clean.

12. The sprinklers on the athletic field overshoot the field and water the sidewalk and street (and unwary passing pedestrians).