Slashdot Mirror


User: jpardey

jpardey's activity in the archive.

Stories
0
Comments
415
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 415

  1. Re:Odd... just did this in class today... on IBM Creates Ring Oscillator on a Single Nanotube · · Score: 1

    I think you are thinking about a ring modulator. Totally different thing. It multiplies two signals together. You might want to see this page... http://en.wikipedia.org/wiki/Ring_modulation

  2. Odd... just did this in class today... on IBM Creates Ring Oscillator on a Single Nanotube · · Score: 5, Informative

    Lets see if this helps. Some people were confused...

    A ring oscillator is a device for making square waves. It uses a common component, a NOT gate. In digital logic, there are two levels, high and low (or 1 and 0, respectivly). High is usually, as far as I have seen, +5 volts, while low is 0 volts (ground).

    A NOT gate simply inverts the input. If the value is 1, it outputs 0. If the value is 0, it outputs 1. If the value is somewhere between the two, it will choose one state or the other based on some threshold voltage.

    Changing output is not instantaneous. How much time it takes, I don't know. However, it is very fast.

    I was going to draw a schematic, but I gave up on appeasing the lameness filter. So, we will use the power of imagination! Imagine one of these NOT gates hooked up to itself. It will switch on and off at a terrific rate. Put a wire on the output, and you have a square wave! Want it slower? Take another two NOT gates, and put them in the loop, so that the first one goes to the second goes to the third. Slower? Another two. If the number of NOT gates was even, the inverted signal would be uninverted by the next NOT gate, which is not what we want.

    For more control, one can use a capacitor in a certain arrangment (I'm not looking through my notes). It will take a while to charge and discharge, acting as a delay. Just don't read its voltage as the signal, or you will get a dropping bit, then a rising bit, rather than a nice clean square wave.

    Quite useful devices. I hope this clarifies things.

  3. On working a crowd: on Learning to DJ? · · Score: 1

    If you are DJing, and one of the participants at high school prom (aka me) gives you a petition claiming "WE believe you should play some FUNK" with 40 signatures, you know you are doing a bad job.

  4. Re:Homeless on Toronto to Become One Huge Hotspot · · Score: 1

    That would be horrible! Do you know how many images there are to load on some of those financial sites? Torture!

  5. Re:There's someone in my head, but it's not me on Stealth Sharks to Patrol the High Seas · · Score: 1

    The ethical approval people! Ther nice peple. tey smell good.

  6. Not to worry... on Using Barges to Fight Global Warming · · Score: 1

    They're gonna use solar panels. Or maybe penguins in big hampster wheels...

  7. Re:Not suprising on Tech Support to the Stars · · Score: 1

    I'm suprised that The Edge couldn't help. I mean, he sure is good at plugging in delay pedals, one would think an xbox would be comparativly easy.

  8. Before modding parent down... on Linux Powers Military UGV · · Score: -1, Troll

    ...think. This post exemplifies slashdot perfectly. Barely formed posts, disregard of whether a key is hit or not, blind fanboyism, bad punctuation, and rather lame humour. The parent post is a classic. Please do not mod it down.

  9. Re:the old-fashioned way on Internet Firms Raise Profile on Capitol Hill · · Score: 2, Funny

    I think a modern method would be more appropriate. Find an underground nuke test site, give each lobbyist an H-bomb, and twenty paces. Winner takes all. This method would work fairly well on the afformentioned CEOs, etc, as well. And the efficiency rate is double!

  10. No problem on Open Letter To Star Wars Players · · Score: 2, Funny

    It says "Is will be" in the text, so it's all good.

  11. Sorry, it's not a joke on Wealthy 'Cryonauts' Put Assets on Ice · · Score: 1

    The second step is always "?"

  12. Re:Hostile, hostile, hostile on Apple Sends Hidden Message to Hackers? · · Score: 1

    don't forget my hot girlfriend sister!

  13. offtopic... on New 3D Graphics Card Features in 2006 · · Score: 1

    but does anyone else seriously crave a pizza omlette right now?

  14. Hostile, hostile, hostile on Apple Sends Hidden Message to Hackers? · · Score: 3, Insightful

    The grandfather post said nothing about monopolies, just binding software to specific hardware. Two different things. It seems to me that the point was that if you buy a piece of software, you buy a right to run it on whatever you want. Hence, emulators are not illegal, but roms are.

    Perhaps you should read a post before posting a hysterical comeback with eugenic overtones. I'll go play in the shallow end, you and ESR can do what you please in the patio section.

  15. Black Flag linux is way easier to install on Red Flag Linux Distributor Joins OSDL · · Score: 1

    Say you can't do it, say you can't do it, say you can't do it, then you slip it on in!

  16. Nothing will come of this on NASA Seeks Geniuses and Visionaries · · Score: 1

    They are too educated stupid to recognize real genius... They will never see that (-1)*(-1) = (-1).

  17. Are we related... on The Top 10 Weirdest USB Drives Ever · · Score: 1

    ...because that sounds exactly like my neice, hehe! Oh wait, I don't even had a neice, it just seemed so real. Hehe, ok!

  18. That's why... on Edubuntu - Linux For Young Human Beings! · · Score: 1

    ...you hire that chicken that you used to install debian.

  19. Which explains the PS3 on Free60 Project Aims for Linux on Xbox 360 · · Score: 1

    Aside from not being able to play hacked games, I have a feeling Sony will allow anything to be run on the linux system. What restrictions there will be, I don't know. However, this greatly reduces the legal uses of illegal hacks, and would make prosecution of modders and mod sites much easier, along with reducing the number of coders on the job. Might reduce the number of linux hackers who would bother figuring out how to mod it.

  20. Not quite on Ubuntu: Best Linux Desktop for Business? · · Score: 1

    Best. Thing. Ever. Actually, the best thing ever, is, by definition, sliced bread.

  21. For all you anti DRM folks... on Microsoft Announces CableCARD Support · · Score: 1

    It might suck, but think of this: Uber-root! You can be sysadmin, but there is still a higher power than that! Isn't that awesome?

  22. Sounds like a vast improvement... on Old School Gameplay Collides With Modern Graphics · · Score: 1

    ...compared to my life.

  23. No you don't on Java Puzzlers · · Score: 2, Funny

    Some of us don't hate gay people, while still hating the word "Neuronaut."

  24. Looks like we already do on New Discovery Disproves Quantum Theory? · · Score: 1

    I click the link, and there's everything!

  25. Re:Clearly... on Fighting FUD with Humor · · Score: 2, Interesting

    He has also never taken a first year compsci class. Not that the people in it were dumb, but to most people, computers ARE foreign. No one had really used Unix, while I had installed various Linux distros on home machines (I am no expert, I must add). It was a lot of fun to help out my fellow students, most of whom were going on to compsci degrees, while I was doing math and physics. Now I get the most awesome class ever, 251 at my college, systems and networks! Install Linux, secure it, etc etc... lots of fun.