Hey, I'm the author to the article "Producing Lenses With 3D Printers". It was originally in LaTeX and I think it looked a lot better that way. You can get the original PDF of it here.
It's good. I'm going to have to disagree with you on it being overrated. It's dense and long but it has lots of good things. I've learned a lot, despite only having started reading it recently.
IMHO, this is exactly the way that Slashdot should be going. Threads like this are interesting, add to the reservoirs of internet knowledge, and have the highest quality to noise ratios.
I (and I suspect many others) read Slashdot not for the latest +5 funny comment (though those can be fun to read) but to read the opinions of brilliant minds. And when those minds start trading secrets... Everyone wins.
For smaller parts, I'd take apart old printers, photocompiers, fax machines, et cetera. They have lots of pieces to help move the paper... (They're also a great source of ports, general electronics, and lots of stepper motters.)
Consider other devices you're throwing out (toasters, harddrives, et cetera).
A majority can do anything, even if they only have just >50 of the seats.
A riding only needs 50.000...1 percent of the vote.
That means that an ideal positioned 24% (155/308*0.5) could rule the country (presuming 100% voter turn out and no spliting the vote; could be signigicantly lower).
Don't use technical words, don't try to teach anything specific at all, and don't try to sell Linux or open source (kids tend to respond to sales pitches cynically and negatively).
Yes... But on the other hand it's a great opportunity to point kids in the right direction. Sadly, schools provide few opertunities for students to explore advanced topics. Consider handing pages with a list of IT words they can research (C++, TCP/IP, Linux...), Live CDs, or even an old computer with Linux for the class room.
I wish someone had done something like this, not just for IT, but for science and math as well. As it is, it took me till grade nine to get into the interesting stuff.
Titanium dioxide is commonly in sunscreen and paints. A minority (including someone I know) have a allergic reaction to topical application.
As long as the paint doesn't secrete titanium dioxide into the air, the only problem I see is that allergic people have to where gloves when they paint.
As someone who tried to get a school to switch to Linux, let me tell you about the way the schools waste money: it's worse than you know.
A public school pays a fee per computer over certain standards to the school board to cover licenses. It doesn't matter what they run on it. This significantly reduces a individual schools incentive to change...
Of course, one can intentionally make computers not meet these standards...
Also, two of my aunts are teachers. One of them was given a computer with a `pirated' version of Windows (or so it said, with Microsoft...) and full of porn. The children nearly saw. But this way the board could say that all the class rooms had their own computer.
And remember, the school non-optionally payed money for this computer.
Still, the idea of having a Innovation section for people to create prior art is valid. I know that I would put stuff there, just to prevent my (probably not worth that much) ideas from being used as bludgeoning hammers by large companies.
Besides, it would be a good way to get feedback on cool ideas.
Just make sure that you can upload PDFs along side the article, because many of these ideas won't be on other sites. And let people have a way to get back to you so that you can take credit of your idea.
Let me begin by explaining how I came to use LaTeX. One of my friends pointed me to LaTeX. I read the Not so short Guide to LaTeX and loved the thought behind it. I used it for everything. Biology, chemistry, physics, math, papers, letters, essays, type setting in other alphabets... The list goes on and on.
And I discovered something: while it has a steep learning curve, LaTeX is easy. The problem is that people don't grow up using it.
That said, there are some poorly designed packages... These can be difficult to use... Just search ctan and read documentation till you find one that you like...
The conspiracy side of me wonders if Microsoft set this up. Think about it: Microsoft does some open source stuff, 24 hours later there is a lots of attention to this which all ignores that it is not the FSF but a blogger. Is Microsoft trying to pull a open source coup?
When the distance from source to sink is measured in meters instead, wouldn't it make sense to avoid the inversion step, and just use a voltage stepdown transformer, keeping everything DC? You'd have to install DC power supplies into your computers. Do those even exist? Of course power not going to computers could be run into an inverter to power other household AC things...
No.
DC transformers, in the traditional sense, are impossible for anything longer than a few seconds. A transformer relies not on the existence of an electromagnetic field but on the change of an electromagnetic field.
V=-n \delta \phi / \delta \phi
v_1/v_2 = n_1/n_2
Now, it is possible to step down in some ways. Firstly, you could use a resistor. This means that the rest of your load needs to be known. You could also put you voltage sources in parallel...
Disclaimer: This is just my understanding. I'm a high school student. Don't take my word for it.
because verily nobody is stupid enough to buy something they can download legally! Right? Right!? I mean come on, people don't even buy stuff they can download illegally anymore...
They're not just selling Ubuntu. They're selling Ubuntu with support. The support is what people are paying for.
How about a look at the big picture? Gates & co. are robbing the rich, and giving a fraction of this money to the poor. The alternative could be that we used Free software, and instead of the money going to Microsoft, it could go more directly towards helping the poor
A lot of plastic, when exposed to water, breaks off molecules. Since plastic is a carbon hydorgen oxygen polymer, the compounds that break off are organic compounds. This isn't exactly healthy. For instance, the type of plastic used in cheap water bottles releases estrogen.
Slashdot Mirror
Bruce isn't the only person from OHJ here :) I'm Christopher Olah, the author of the "Producing Lenses with 3D Printers" article.
I'd be happy to answer any questions about my article, surfcad, ImplicitCAD, Malthus, 3D printed vacuum cleaners, and any questions about my other projects or 3D printing in general.
Hey, I'm the author to the article "Producing Lenses With 3D Printers". It was originally in LaTeX and I think it looked a lot better that way. You can get the original PDF of it here .
I'd be happy to answer any questions about it, surfcad, ImplicitCAD, Malthus, 3D printed vacuum cleaners, or any questions about my projects or 3D printing in general.
(Essentially resubmitting my previous anonymous comment since I reset the login for this account and no one sees Anonymous Coward posts.)
It's good. I'm going to have to disagree with you on it being overrated. It's dense and long but it has lots of good things. I've learned a lot, despite only having started reading it recently.
IMHO, this is exactly the way that Slashdot should be going. Threads like this are interesting, add to the reservoirs of internet knowledge, and have the highest quality to noise ratios.
I (and I suspect many others) read Slashdot not for the latest +5 funny comment (though those can be fun to read) but to read the opinions of brilliant minds. And when those minds start trading secrets... Everyone wins.
For smaller parts, I'd take apart old printers, photocompiers, fax machines, et cetera. They have lots of pieces to help move the paper... (They're also a great source of ports, general electronics, and lots of stepper motters.)
Consider other devices you're throwing out (toasters, harddrives, et cetera).
Consider this:
A majority can do anything, even if they only have just >50 of the seats.
A riding only needs 50.000...1 percent of the vote.
That means that an ideal positioned 24% (155/308*0.5) could rule the country (presuming 100% voter turn out and no spliting the vote; could be signigicantly lower).
A similar technology is DNA stem-loop logic gates. Theye were used to make MAYA and MAYA II, a DNA computer that could play tic-tac-toe.
Don't use technical words, don't try to teach anything specific at all, and don't try to sell Linux or open source (kids tend to respond to sales pitches cynically and negatively).
Yes... But on the other hand it's a great opportunity to point kids in the right direction. Sadly, schools provide few opertunities for students to explore advanced topics. Consider handing pages with a list of IT words they can research (C++, TCP/IP, Linux...), Live CDs, or even an old computer with Linux for the class room.
I wish someone had done something like this, not just for IT, but for science and math as well. As it is, it took me till grade nine to get into the interesting stuff.
...TiO2 is basically poison.
Titanium dioxide is commonly in sunscreen and paints. A minority (including someone I know) have a allergic reaction to topical application.
As long as the paint doesn't secrete titanium dioxide into the air, the only problem I see is that allergic people have to where gloves when they paint.
As someone who tried to get a school to switch to Linux, let me tell you about the way the schools waste money: it's worse than you know.
A public school pays a fee per computer over certain standards to the school board to cover licenses. It doesn't matter what they run on it. This significantly reduces a individual schools incentive to change...
Of course, one can intentionally make computers not meet these standards...
Also, two of my aunts are teachers. One of them was given a computer with a `pirated' version of Windows (or so it said, with Microsoft...) and full of porn. The children nearly saw. But this way the board could say that all the class rooms had their own computer.
And remember, the school non-optionally payed money for this computer.
Still, the idea of having a Innovation section for people to create prior art is valid. I know that I would put stuff there, just to prevent my (probably not worth that much) ideas from being used as bludgeoning hammers by large companies.
Besides, it would be a good way to get feedback on cool ideas.
Just make sure that you can upload PDFs along side the article, because many of these ideas won't be on other sites. And let people have a way to get back to you so that you can take credit of your idea.
It's not as bad as it seems.
Let me begin by explaining how I came to use LaTeX. One of my friends pointed me to LaTeX. I read the Not so short Guide to LaTeX and loved the thought behind it. I used it for everything. Biology, chemistry, physics, math, papers, letters, essays, type setting in other alphabets... The list goes on and on.
And I discovered something: while it has a steep learning curve, LaTeX is easy. The problem is that people don't grow up using it.
That said, there are some poorly designed packages... These can be difficult to use... Just search ctan and read documentation till you find one that you like...
This, to my understanding, is not the FSF. It's a blogger with the user name Johns on their site (Just look at the address: http://www.fsf.org/blogs/community/apple-challenge ) .
The conspiracy side of me wonders if Microsoft set this up. Think about it: Microsoft does some open source stuff, 24 hours later there is a lots of attention to this which all ignores that it is not the FSF but a blogger. Is Microsoft trying to pull a open source coup?
When the distance from source to sink is measured in meters instead, wouldn't it make sense to avoid the inversion step, and just use a voltage stepdown transformer, keeping everything DC? You'd have to install DC power supplies into your computers. Do those even exist? Of course power not going to computers could be run into an inverter to power other household AC things...
No.
DC transformers, in the traditional sense, are impossible for anything longer than a few seconds. A transformer relies not on the existence of an electromagnetic field but on the change of an electromagnetic field.
V=-n \delta \phi / \delta \phi
v_1/v_2 = n_1/n_2
Now, it is possible to step down in some ways. Firstly, you could use a resistor. This means that the rest of your load needs to be known. You could also put you voltage sources in parallel...
Disclaimer: This is just my understanding. I'm a high school student. Don't take my word for it.
because verily nobody is stupid enough to buy something they can download legally! Right? Right!? I mean come on, people don't even buy stuff they can download illegally anymore ...
They're not just selling Ubuntu. They're selling Ubuntu with support. The support is what people are paying for.
How about a look at the big picture? Gates & co. are robbing the rich, and giving a fraction of this money to the poor. The alternative could be that we used Free software, and instead of the money going to Microsoft, it could go more directly towards helping the poor
No, they're robbing the rich and the poor...
Be careful with plastic...
A lot of plastic, when exposed to water, breaks off molecules. Since plastic is a carbon hydorgen oxygen polymer, the compounds that break off are organic compounds. This isn't exactly healthy. For instance, the type of plastic used in cheap water bottles releases estrogen.