Olympic Judgement

I was talking to my Dad about the Olympics. He hasn't watched a lot of it but He started to complain about the sports which give judged scores, preferring the ones with definable quantitative measures. I thought this was interesting since I've complained about this as well. Are we genetically predisposed to complaining about gymnastics scoring? :)

I think it is pretty evident that the scoring system just does not work. This is evident in the spread of the scores given by the judges. If all the judges gave nearly the same score you may be more inclined to believe that the score they gave is what the athlete deserved. Instead, the Olympic judges, presumably the best judges around, cannot give consistent scores between themselves. Right here I would like to run through some numbers, calculating standard deviations of the group scores and compare that verses the variation between athletes. Unfortunately I don't remember enough of my statistics class to do a good job of that quickly. (If someone wants to give it a shot, I'd appreciate it, maybe I'll try later.) Though, I am confident that the variations between the judges is far beyond the differences which determine gold and silver and bronze.

The problem is, I really enjoy many of the judged events. It is amazing what these athletes do. I am in awe. How can we help to increase the confidence in the scores? I think this could be done. I started thinking about diving. A computer-camera system could be put into place which would estimate the angles of the body, determining rotation, separation of the legs, and ultimately it could put a quantitative measure the amount of water displaced. Similar systems could be used in gymnastics as well.

A system like this would not solve the problem outright, but it would give the judges more to work with. It also would give the audience some tangible scores that they could appreciate and understand. In the end the variation between the athletes would need to be accounted for. This would all come down to human judgment, but maybe with some engineers help we can reduce the error within the judges and insure that the athletes get the metals that they deserve.

Electricity vs. Gasoline

I got fired up to write this article because of hippies. I think they are a frequent source of inspiration for us on this blog. In essence, I was reading a forum and as usual someone has to complain about people driving and that you should just move closer to work and bike. We'll that is great if you can do that, but it is obviously not a solution for everyone. (I am not going to get into the details here but... cost of living, city life, raising kids are good reasons.)

This example wasn't the entirety of my frustration. This kind of mindset is typical of the now more popular casual environmentalist claiming that individuals need to make drastic changes to their lifestyle (possible significantly detrimental ones) in the name of the environment. I think this kind of argument is bound to fail. Individuals will not change make significant changes easily, especially if they are going to inconvenience themselves. Instead, what should the environmentalist ask:

Can we create a global system which has the advantages of our current system without the pollution? How do we accomplish this? What technologies need to mature? What is the impact on the economy or the average joe's wallet? (it needs to be minimal, preferably create a system which makes money) How are we going to address growing energy demands?

If they maintained this attitude (an engineering approach to the problem - maybe they could actually get involved in the engineering and science themselves) they might make more significant changes. This is the point - the environmentalists agenda will not be fulfilled by making everyone feel guilty, instead it will happen if people can make money at it. This is only going to happen if technological advances allow it. Simple, science + money = solution, that is how you change the world.

Somewhere in the middle of this all I was researching carbon dioxide release from several energy sources. People have a tendency to blindly trust what they have been told. I asked myself, how much CO2 is created while driving a car vs. consuming electricity? Here are the numbers. A gallon of gasoline produces around 20 lbs of CO2. That may seem odd, since a gallon of gas only weighs about 6 lbs, but it is mostly carbon and it combines with oxygen from the atmosphere. O2 is much heavier than Carbon. Thus, heavier CO2.

On the other hand, a coal plant might produce around 2 lbs of CO2 per kWh. To put this in perspective lets say a home is using 11000 kWh/year. (An average value) This equates to around 22,000 lbs of Co2/year (if they ran off a coal plant) or maybe as low as 10,000 lbs of CO2. (if they have other combustion energy sources, natural gas, etc) This is equivalent to 500 to 1100 gallons of gasoline per year or 1.36 to 3.01 gallons per day. In a 30 mpg vehicle this equates to 40 to 90 miles of driving per day.

Thus, a 20-45 mile commute to work (everyday) in a vehicle with a reasonable gas mileage will produce about as much CO2 as a typical home.

I like numbers.