Slashdot Mirror


User: drerwk

drerwk's activity in the archive.

Stories
0
Comments
595
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 595

  1. Re:A photon carries a lot of information on Ultra-Dense Optical Storage on One Photon · · Score: 1

    >By generating a photon with the correct energy, I have encoded, in theory at least, a vast amount of information.
    Not really, a particular energy is just a single number. It may have a vast range, but it it only a single real number. I suppose we could play the game where if I am able to encode specify the number to arbitrary precision, we can equate that to an arbitrary number of bits. But even though I am a little weak in math, I think that 2 real numbers contain more information than a single real number.

  2. Re:To Clarify on Ultra-Dense Optical Storage on One Photon · · Score: 1

    >Spin in the non-measured axes. That makes perfect sensne. I didn't like time, but my brain was a little slow as I posted. I even forgot the propagation vector. I think should be 3 reals for location, 3 reals for propagation vector, and a +- spin state.

  3. Re:To Clarify on Ultra-Dense Optical Storage on One Photon · · Score: 4, Informative

    Parent is right - article is not particlely clear.
    By itself a photon can be described as having, location, and energy. Thanks to Heisenberg you can only know so much about location and energy at the same time. I don't recall what property fails to commute with spin, maybe time? But the total information in a single photon is at best 3 reals for location, a real for energy, and an imaginary for spin.

  4. Re:Ever used Eclipse? on 2007 Java Predictions · · Score: 1
    That is a shame since I am a fan of swing. The latest versions of java combined with newer hardware run swing apps quite nicely and responsively. I can write apps with netbeans using swing very quickly and its sweet.
    Not sure you are commenting on my post or on the parent. I've writen GUI Java apps and I've used Swing, I just would not choose to use it on a public website these days. As a deployment in the corporation, or among well behaved/controlled clients sure, but not in public. In public you really want things to work 99%+ and in seconds, and I have not seen web client Java do that.
  5. Re:Ever used Eclipse? on 2007 Java Predictions · · Score: 1

    Yes, svn supports binary blobs. Good also to hear that you manage the action script in svn. I don't recall that I could do that without cut and paste 8 years back (not svn back then either). But, as you try and build larger and larger projects, or share a project, or write tools that can parse, test, and generate code for the language you are using you will likely find that opaque blobs of binary are not helpful. This is not to say that Flash is not the right tool for your job, just to say that scaling to large projects, long lasting projects, or projects with many developers not in the same room requires easy visibility into the source code. I've had the pleasure of using some very nice visual programming environments (Prograph anyone, how about mTropolis?) which made me much more efficient than I was with the current text based environments. But, without a diff and merge facilities, I could not tell from day to day what had changed, or who had changed it. I've experienced the frustration of having a blob from last week that worked, and having a blob with a few bug fixes and a one new bug but no way to go line by line and figure out what had caused the new bug. My current preference is to be correct and know I can retrace my steps and the steps my developers take even if it seems comparatively slow; in short I'll keep the cow, and pass on the magic beans.

  6. Re:Ever used Eclipse? on 2007 Java Predictions · · Score: 4, Insightful

    Didn't have you coffee yet this morning?
    The parent makes a living programming J2EE. He might even use Eclipse.
    I think for many folks Java is used to write software that does not see the front of a web page.
    In fact I have not used Java on the client side since about '98. But I write far more Java now than I did back then. I hope that the work Ethan Nicholas is doing to will help, but frankly Flash works fine for many web pages. And as long as I don't have to write the Flash code I'm fine with that. Is it still programming via dialog box? Can I use svn with my Flash code these days? I also hear AJAX is popular and effective for client side work. Anyway, Java is not likely to die anytime soon.

  7. Re:Retrospect on Backup Solutions for Mac OS X? · · Score: 1

    I too use Retrospect. I've used it sine '92, and it has saved me a number of times. But I liked the Dantz folks quite a bit - very helpful. What I've seen listed here in the way of problems is troubling, and I have not had to deal with the new owners yet. I like that I can run a Retrospect client on my laptop and linux box so that all my systems get backed up to an external disk. $.02

  8. Re:Good ol' days on The Lost Art of the Game Company Newsletter · · Score: 1

    My favorite newsletter as well. The authors at Infocom were just plain good writers in all the work they did. (Disclaimer - I worked there many ages ago; as a 6502 hacker, not as an imp.)

  9. Re:Scam... on 256GB Geometrically Encoded Paper Storage Device · · Score: 1

    I think he meant 8*8*8 being 9 bits of color. I don't think my scanner is actually good to 24 bits of color, but I might believe 9.

  10. What kind of repetition? on Software Engineering of GUI Programming? · · Score: 1

    I'd like to know what kind of repetition you are seeing. Some of the posts here point out you will need controllers that are specific to your application. If you are seeing repetition there, then it may be an issue of wanting to reactor the UI itself and not the code. If you are copying the same draw(getIcon(MY_COOL_ICON)) then maybe you do need to subclass some pane to hold your icon. Also, at this point, most GUIs can be built nicely with the GUI Editors. Naturally you can make your UI better if you put more work into it. And some things still have to be done fully custom, e.g. you want a hexagonal window instead of the default rectangular or some such. I think what you may find, is that smooth, well designed interfaces that look good visually take a fair amount of effort.

  11. Re:Seriously? on Justin Long No Longer A Mac · · Score: 1

    In college I lived in what some people called the "hippie" Hovse. A fair number of people wore tie-dye, went to Dead shows, and so on. When I moved to Santa Cruz and then San Francisco, I learned that we were not in fact hippies for at least two reasons; 1) we showered more often than weekly, 2) I don't think anyone at Caltech wore Patchouli. Now I see the people I lived with as more "techno-hippies" than "hippie" and see it as a positive distinction.

  12. I'm liking the OS X version... on Firefox 2.0 RC2 Review · · Score: 1

    The built in spelling checker is my favorite addition. I've not had much luck with the extensions that offered this feature. Now I'd really be happy if Firefox would honor the browser.tabs.loadOnNewTab - I just want my homepage in each new tab. I suppose I could again use one of the many extensions, but if the setting is there it should work. Any opinions on the use of large numbers of extensions verses getting it in the browser directly?

  13. Re:Well written, but on Windows vs Mac Security · · Score: 1

    I don't have an Intel mac, or the motivation to track one down, but according to this you can have Classic on Intel: http://theappleblog.com/2006/07/01/classic-on-inte l-macs-courtesy-of-sheepshaver/

  14. Re:Well written, but on Windows vs Mac Security · · Score: 1

    Yes, classic. I must have misunderstood, I though that it was available, just not installed. My systems are still over a year old. I guess I could see the difficulty of supporting classic on Intel, but that is too bad.

  15. Re:Well written, but on Windows vs Mac Security · · Score: 3, Interesting

    "they basically abandoned their own collection of pre-security era software" Not sure I understand. I am able to run software I wrote still have from 1990 (OS 6) on my Mac today (OS X). No problem, except for the serial port...

  16. Re:Advantages? on Under the Hood of Quantum Computing · · Score: 1

    Actually pleasently clever! Wish I had mod as well.

  17. Re:Asus W3J on 'Perfect Storm' of Mac Sales on the Horizon? · · Score: 1

    Keeping an open mind, I went to see what the Asus site has to say about the W3J.
    Equipped with the latest dual core technology, the W3J enables users to simultaneously run demanding applications, such as running virus scan while talking on Skype and surfing the web.
    Since I don't have to run a demanding virus scan on my Macbook, can I claim some small factor more processing power for my mac when comparing to those folks running windows? Hope this makes these endless comparisons easier.

  18. Re:Sneer if you like on Microsoft Hoping for Vista in January · · Score: 1

    Microsoft - we put the backword in backword compatability....

  19. Re:Indeed, Jewishness on The Shallow Roots of the Human Family Tree · · Score: 1

    I was unaware of thr Roman versio - I had always heard: mother's baby, father's maybe..

  20. Re:Neat [ You want a Foucault Pendulum ] on Is the Earth in a Vortex of Space-Time? · · Score: 1

    There would be many ways to test for a rotating frame even in the absence of any other mass. Any gyro will stay fixed, and you could observe that you were in a rotating frame. My favorite test for Earth's roation and no way to observe the stars would be the Foucault Pendulum. http://www.phys.unsw.edu.au/PHYSICS_!/FOUCAULT_PEN DULUM/foucault_pendulum.html This can be constructed with nothing more high tech than a mass and a decent cable. I think this would be the lowest tech, highest sensitivity test you could do.

  21. Re:The code wasn't changed on Hyperthreading Hurts Server Performance? · · Score: 4, Insightful

    It seems like an exteremely BAD idea to get programs to worry about the total cache usage on the CPU.
    If you want to maximize performance then you want the compiler to know as much as possible about the architecture. If you have no cache then loop unrolling is a good thing, if you have a small cache then loop unrolling can bust the cache. If you are doing large matrix manipulations, how you choose to stride the matrix, and possibly pad it is exactly dependent on the size of the cache. Now, it may be that having the applications programmer worry about it is too much to ask, but the compiler most certainly needs to worry about such detail.

  22. Re:Don't pay for CD from these guys on Sony's EULA Worse Than Its Rootkit? · · Score: 1

    I think it might pay to not call them CDs. If the article at http://news.bbc.co.uk/2/hi/technology/4406178.stm is correct then they are not CDs. Fortunately, it is possible to avoid buying discs like this. Philips, who defined the CD standard and then made it widely available, has been very clear that these music delivery systems do not count as Compact Discs and cannot use the CD logo. As far back as 2002, Philips representative Klaus Petri told Financial Times Deutschland that "those are silver discs with music data that resemble CDs, but aren't". And online retailers like Amazon will tell you that what you are buying is a copy-protected data disc that may, just may, play properly in your CD player but will not work as expected on your computer.

  23. Re:Let me be the first to say on 2005 Will Probably be Warmest on Record · · Score: 1

    I'm not sure if it is yet possible to prove that smoking caused a specifc case of cancer. And until 1996 it was not even possible to point to a specific mutation such as in the p53 tumor supressor gene that was caused directly by cigarette smoke (Science 1996;274:430-432). But it was pretty obvious that stoping smoking was likely a good idea long before 1996. I'd have to say that we are already at the point where reducing carbon emmisions is likely a good idea.

  24. Re:Screen, Keyboard and Arse on Ultimate Software Developer Setup? · · Score: 1

    Totally agree with parent. I took up olympic lifting about 4 years ago. Deadlifts ended any wrist problems I had been having, and no more back pain. Not to say workouts won't make you sore, but none of the old chronic problems. Also, heavy lifting puts an end to osteoporosis, and this is true even if you start late in life.

  25. Re:First? on Floating Nuclear Power Station · · Score: 1

    IAAP but not a NP. The 2nd law is not being bypassed. Consider, if you just have matter around and a way to convert it to energy you get your mc^2 out. In a breeder, IIRC, the fast neutrons are captured by non-fissile uranium, and become fissile. The energy is already there in the nucleus of the atoms, but until it is put in a fissile state by neutron capture it is not accessable. I'm guessing that when the material fisses, you even get the neutron back, but that is speculation. The only way to break the 2nd law here would be to get more than mc^2 out, and I don't think we are quite there yet.