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Comment Natural Selection (Score 1) 299

You might not be wrong. If Jupiter wasn't there, a comet may have hit earth and broke it before we came to it. It's like natural selection. The earths out there, that don't have their Jupiter sweeping the trash, might not have the chance to have us humans, that think that Jupiter sweeps the trash. If this is the case, then Jupiter does indeed have a role of sweeping trash, or it would not be recognized. Not as stable, but still interesting.

Comment Light bulbs and batteries (Score 3, Insightful) 364

Both items are familiar to the students, so they can be tricked into learning something new. Have them connect light bulbs in series, then in parallel, to see how the brightness changes. Add batteries in series. Add batteries in parallel. Once they are familiar, have them connect ammeters and voltmeters for numerical interpretation. This would give them a solid intuitive feel for how circuits work.

I would not teach them anything about transistors and capacitors until later, because that would require too many advanced concepts. Make sure the students do not feel overwhelmed by the material. If the students feel confident about what they are doing, ie. it makes sense that adding in more batteries makes it brighter, then they will be inquisitive to learn more, and confident enough to set out on their own.

Comment Algorithms and Data Structures (Score 5, Insightful) 537

Learn about Binary Search Trees, Red Black Trees, Bubble Sort, Quick Sort, Heaps, etc. Those are the important things to know. Bob Dylan is not famous for knowing English grammar and spelling. He is famous for what he does with them. Teach him Chinese, and he can most likely make amazing songs in Chinese as well. You didn't go to college to learn grammar and spelling. You can learn that in elementary school. Instead, you're going to college to learn how to use the language to create amazing things. It is an abstract level above the syntax level you see on the computer screen, and it is something crucial that anyone learning anything in college _must_ understand.

Comment VoIP is illegal? (Score 1) 114

iPhone gets wifi at home, Starbucks, ... places where the user directly or indirectly pays for the wifi. If they are allowed to use VoIP on the laptop, then why can't they use VoIP on the iPhone? If there is no wifi in the area, then the user must use the cellular network, anyways. It sounds as if there is a secondary interest, "to allow China to monitor any communications sent over 'secure' links." I suppose cellular networks may be easier to monitor than VoIP on the internet.

Comment Touch Point (Score 2, Informative) 569

My Thinkpad X61's touch point is perfect. It's in the middle of the keyboard, so there is minimal hand movement to move the mouse when typing. It moves much better than the touchpad because you don't need to reload once you reach the edge of the sensitive location. It also takes up very little room, so it works on the plane, etc.

Comment Causation vs. Correlation (Score 1) 138

Excellent example. Bad laws are bad because it is possible to break them even when the lawbreaker is doing the right thing. However, striking a bad law down does not require an actual test case to show that a bad law is bad. A test case may help, but it is not necessary. Therefore, it is complete to say that bad laws get struck down when the legislative branch smartens up and changes them. The legislative branch may smarten up by seeing test cases of people breaking them, or it may just smarten up by thinking a law through and not seeing any test cases. Either way, bad laws get struck down.

Comment Re:Arteries and Veins (Score 1) 99

Oh yes, that is a good idea. Going perpendicular to the field results in no force. Unhooking it would need the magnetic field, though. It is always interesting how people use the environment to supplement the necessary tools for the robot to do its job. Hard to see, but delicious when seen.

Comment Arteries and Veins (Score 3, Interesting) 99

The summary confused me, so I looked it up, and it is true. Veins bring blood towards the heart. Arteries bring blood away from the heart. I always thought blood flows pretty fast, so the robot would need quite a bit of magnetic force to go against the blood friction. If it finds a clot, can it ram its way through like a battering ram? That would be cool.

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