People are sick and tired of car payments and insurance payments.
I'm sure that's partly true, but I would bet it's more due to the fact that cars last longer than they used to. It used to be relatively rare for a car to drive 100,000 miles, but now for many cars that's their first scheduled tune-up. If cars weren't lasting longer it wouldn't matter if people were sick of car payments, they'd still have to buy another one when their current car broke down. Yes and there does seem to be some evidence of particularly younger people choosing to live closer to work where they can bike and walk to work, but it's certainly not as big a factor (yet) as cars lasting longer.
The future will be driverless cars, mass transit and bicycles in urban/suburban areas.
That's probably true. Though bicycles may never catch on in the US the way they have in Europe and elsewhere. The car lobby and car culture in the US has been successful at limiting the options for biking.
Agree too, but you've missed a couple factors that should be considered.
1. All the "You can have my steering wheel when you pry it from my cold, dead fingers!" people.
This problem will almost entirely be solved by the pricing of insurance and cars. If that doesn't resolve any problems then drivers licenses and regulations will solve the rest. Consider that once the percentage of cars that operate autonomously hits a tipping point then the drivers that are not represent a hazard and remove the possibility of many of the benefits of driverless cars. Costs of insuring a car to drive it by oneself will go through the roof due to the much higher accident rate and most people will not be willing or able to pay that. That higher insurance cost alone will greatly reduce the number of people driving their own cars. Then if people driving their own cars is still a problem licenses can either no longer be issued or driving simply not be allowed.
I was once like you I loved the freedom of driving, but I've become more flexible and realized that as long as I can get where I want to it doesn't matter how I get there. In fact I'd rather save the time driving for something more enjoyable. I get the same sense of freedom by taking a long distance bike journey.
But I think you're spot on with a lot of the potential risks of trusting the driverless cars. The extent to which those are managed well will determine whether driverless cars represent a benefit or harm to society.
I guess if you want to call expensive industrial laser sintering "3D printing."
But that is the standard now. Language evolves and that is now the standard usage. Wikipedia is no authority, but it does tend toward standard usage and in this case it does align with common sources. http://en.wikipedia.org/wiki/3...
I think most people, me included, see "3D printing", as opposed to "additive manufacturing techniques we've been using for thirty years", as something you might want to do in your home.
Yes, as 3D printers improve they will find some uses. Currently I don't think there are any good ones. There ARE interesting things being done to develop 3D printing into a useful tool, but we keep getting hype-filled stories like this one instead.
Ok, see your point, but you should've specified the 3D printing methods you referred to earlier.
Problem is, there aren't any of those. The nearest anybody seems to have found is printing gun parts, and that's only because the parts in question are weirdly regulated by the US government.
No, it seems there are at least a few good applications of 3D printing like the GP talked about such as 3D printed body part replacements like titanium jawbones. They are apparently cheaper than the alternatives, can be custom shaped to the patient, and be made faster than the alternatives. As materials improve the integration into the body is expected to improve as well. I agree though the summary of this one was bad. This was a good learning exercise and it was improperly changed to "Working" making it into something it wasn't. There's nothing wrong with learning something new, but making it out to be something it isn't is not so good.
2. Homeschooling academics can be more rigorous. As an engineer, I consider math to be the foundation of all my success, and common core has turned math into a laughingstock. Enter homeschooling, where I can pick the "Singapore Math" curriculum. Singapore typically scores number 2 every year on the international math achievement exams, their math program is entirely in (British) English, and I can have their exact program for my kids instead of common core.
Losing mod points to respond to this, but as a math teacher I can say based on substantial study and practice that you are drinking the wrong cool aid about common core. To see why you have to understand what common core is and isn't. Common core is just the set of standards, and it's important to read a bit of them to realize what that means and doesn't. Everything else that isn't written in the common core standards, but yet people still incorrectly call "common core" is just an attempt at implementation of the common core. If you see a given incomprehensible homework assignment, that's the implementation, not the common core. The standards don't give implementation details, the teacher, textbook, and/or district provide those.
Before I go further though, I will agree with your first statement. Homeschooling can be more rigorous, but as I am considering homeschooling my children, the thing I would do would be to implement the common core to it's fullest extent and attempt to exceed it.
I'll cut to the chase and give you the summary: the common core standards are more rigorous and are a substantial improvement on every state standard before them that I am aware of. They embody the important parts of the best of education research and the math standards for example are substantially based on the previous work of the Principles for School Mathematics developed by NCTM. So if a given implementation is bad, it means either the teacher or textbook are not as good as they could be, not that common core is bad.
Look at the Standards for Mathematical practice: http://www.corestandards.org/M...
and the following specific standard: CCSS.MATH.CONTENT.HSA.REI.A.1
Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.
A classroom attempting to implement the standards for mathematical practice to fully meet the standard above will be leaps and bounds above a traditional classroom in terms of rigor, cognitive demand, ability to reach diverse students, etc.
Also having studied the TIMMS study in depth I can say that the reason Singapore does well on the exams isn't necessarily related to their curriculum, but likely has more to do with parental support for education.
[A computer is] like an Old Testament god, with a lot of rules and no mercy. -- Joseph Campbell