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User: SailFly

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  1. double-slit interference patterns with gravity? on The Speed Of Gravity Revealed · · Score: 1

    I wonder if it's possible to simulate an interference pattern in gravity, such as the double-slit experiment with light.

    As I recall, If two narrow slits are parallel and near each other, the resulting diffraction patterns will interfere with each other causing hi/lo super-positioned wave patterns. I remember this demonstrated in physics class with a tank of water and slits made in small bulkhead in an aquarium tank. The wave on water would diffract in the two slits and the resulting interference pattern would make a series of hi/low areas that seem to radiate from the area between the slits. The patterns would change with frequency of the wave.
    See http://homepages.ihug.com.au/~flavios/diffrac.htm

    How could one change the frequency of a gravity wave? I guess the frequency of gravity waves would change proportional to the change in gravitational fields?

    What affect would the sudden disappearance of mass (fission) have on gravity? I wonder if during a-bomb testing there was ever any observation for change in gravitational field?

    Perhaps these gravity patterns already exist as unexplained anomolies but are actually interference patterns?

    If light waves diffract upon passing through a narrow slit, I wonder what kind of 'gravity slit' may exist to cause gravitational diffraction? Black holes, large mass objects, or sudden appearance/dissapearance of mass as in nuclear fusion/fission.

  2. bookpool.com - $29.95 (but out of stock right now) on Real World Linux Security, 2nd Edition · · Score: 2, Informative
  3. 100 ft. Cold Water Geyser (powered by CO2) on Seeking Interesting Sites When Travelling the World? · · Score: 1
    Near Green River, Utah there is a cold water geyser that is well known and down played by locals. It errupts approximately every 12 hours, and is quite a show. There is no infrastructure or park in place, so bring your own drinks and snacks then make a day of hiking around the canyons and river. Although it was about 7 years ago, I'll never forget leaning into the blast of cold water with all my weight (235lbs) and gasping as the CO2 escaped the water. It was like leaning on a pole made of cold selzer water. My soaking wet shoes fell apart the next week, due to mineral crystals making the threads brittle (My roommate had the same experience). A geologist I once met told me there are only two in the world (other is in Switzerland), and both are powered by chemical decomposition. We found the listing in a AAA travel guide for Utah.

    See: Crystal Geyser

  4. SCM & Project mgmt via web on Open Source Requirements Management Systems? · · Score: 1

    Here are some ideas....

    Project and group management:
    http://www.phprojekt.com/
    http://php groupware.org/

    For documentation, check out Doxygen:
    http://www.stack.nl/~dimitri/doxygen/

    HTH...

  5. Never thought I would outlive the WTC on One Year After September 11 · · Score: 1

    Summer 2001 was my last time in NYC, and I was running late when I caught the PATH train back to NJ, departing from the WTC. I wanted to see the observation deck, but decided that I would see it next time in NYC. A notion flashed in my mind that I may die before I make it back to see the World Trade Center.

    Never in my wildest thoughts did I ever believe I would outlive the WTC.

    Maybe it's just this kind of upsetting reality that challenges me to remember who and what is truly important in my life, and just what I am willing to give to become united with my fellow humans who enjoy their freedom too.

  6. It's worth it, but find a good, local jeweler. on Diamonds - Are They Really Worth the Cost? · · Score: 1

    Avoid the mall, they only have over-priced junk. If you're near Delaware I would recommend Janet Grillo, who helped me a few years ago to find a great ring.

    Good luck, and happy hunting!

  7. Not according to Walmart on Rasterman Says Desktop Linux is Dead · · Score: 1

    They are selling both Mandrake and LindowsOS PCs.
    Duron 900, 128M, 20G, Mandrake for $391.

    Walmart

  8. Re:Windows NTP client, Linux on Do You Have The Time? · · Score: 1

    Only because I've used ntpdate before, but not ntp daemon. Plus, I didn't need to serve NTP to other machines. No specific reason really, it's just the path I took.

  9. Windows NTP client, Linux on Do You Have The Time? · · Score: 1

    I use a freeware utility that checks my POP server for new messages, and also keeps my clock up to date.
    See SyTinem

    For Linux I use NTPDATE and run a cron job a few times a day to keep it on track.

    Works for me!

  10. Already exists....or will soon on Isn't it Time for Metric Time? · · Score: 1

    ...Stardates (Ask your local trekkie).

    How about rational time, like Julian time in Pascal (Delphi, anyone?) Each day is 1.0 and time is divided as rational portions.

    If it is midnight today and it's 123.0, then noon today is 123.5, and tomorrow (24 hrs) from midnight is 124.0.

    What ever happened to gradians (?) for trig. Instead of 360 degrees in a circle, there are 400. So, a right angle is 100 degrees. I never used that nasty 'grad' mode, as I was always an under-grad and considered myself a radian (pi) man.

    -

  11. spring cleaning on Is Your Computer a Fire Hazard Waiting to Happen? · · Score: 1

    I open up my systems each year and blow them out with compressed air to remove dust. I started doing this after I had a power supply go out after 1 1/2 years. I was curious (I know, it kills cats...) so I opened up the power supply to find it coated with dust! Thank God it didn't fry the mother board. I took it as a lesson to just clean out my systems each year now... Until I build myself a dust-free clean room :)

    There is a useful program called mother board monitor (MBM) which will perform various actions based on the BIOS reading from fans and voltage indicators of newer mother boards.

    See: http://mbm.livewiredev.com/

    Hope this helps!

  12. Distributed partial files - illegal? on RIAA to Sue You Now · · Score: 1

    It seems to me that RIAA is going after the "big fish" who share lots of mp3 files.

    What if Gnutella would (and soon will) keep partial files distributed on various machines? In theory, we would all have partial files, and therefore would share only part of the original work, not the whole file. So, to construct the original file it would require a collection of partial files assembled together from a variety of hosts.

    This would mean that no single person could be responsible for distributing a single copyrighted work, right? Unless they are considered part of a consipiracy. But, not knowing/caring who the other people are may insulate the individuals from the consipiracy.

    It's like treating distributed files in P2P like the T1 and T3 links that form the internet. The transfer medium isn't to blame, it's the individual who uses it. Using this kind of anonymous distributed file system would ensure that my 10GB that I share doesn't form a single complete mp3, rather many parts of many files. However, the individual who downloads many partials to form a single mp3 might be considered the perpetrator.

    Would this work?

  13. Dirty phone call? on Telemarketers and Cell Phones? · · Score: 2, Interesting

    I remember something I heard about five years ago (I think in Colorado) where a guy started recording all his calls from telemarketers. He would guide the calls into a perverted personal quest with explicit probing questions like "are you wearing any underwear...what color...", and as the caller would respond, the questions became more intense.

    He took his favorite top 10 messages, and made a CD and sold them as a joke album in local stores. Some local radio stations picked up copies and were playing them during the morning rush-hour.

    As I recall, he was able to disclose the "call was being recorded" and was clear that "the caller could hang up if they wish". I guess this was enough to cover himeself legally. Some of the calls really got pretty detailed and disgusting...until the unfortunate caller couldn't stand any more and eventually hung up.

    Anyone heard of this?

  14. I've heard this before... on Copyright Battle Over Nothing · · Score: 1

    ...the sound of one hand clapping, right?

  15. Working for me... on P2P Streaming Radio · · Score: 2, Informative

    I downloaded both the "streamer.zip" and the "streamer_source.zip" files which have links on the page.

    streamer.exe is a console program that handles the network connections, and also is a basic web server interface, so you connect to your localhost IP (127.0.0.1) to the streamer port (8464).

    I downloaded the Oddcast DSP plug-in for Winamp, and it seems to work ok.

    This could easily be ported to *nix and other platforms. However, when compiling the Visual Studio project I get:

    fatal error C1083: Cannot open include file: 'IAINLIB.h': No such file or directory

    The author's e-mail account is also "IAIN", so I assume this is his own library of utility routines. I tried to work around it, and it appears this header has error handling and some necessary typedef declarations.

    I wish the author would share these files at SourceForge.net to provide a forum for more discussion and easier distribution via FTP or CVS.

    I would be an interested developer, and would contribute to this project in some way.

  16. roaming charges? on Can You Hear Me Now? · · Score: 1

    I wonder what he paid for roaming ;)

  17. Like DVD region locking? on Will Microsoft Code-Checking Plans Cripple the GPL? · · Score: 3, Insightful

    Embedded security into a hardware device to restrict its use? Sounds similar to me.

    I wonder how many firmware/BIOS patches will show up that disable or fool the hardware device like how you can disable region locking in your DVD drive -- not that I would ever condone such behavior :)

  18. Re:Don't let the local scum build it on Home-Built vs. Store-Bought PCs · · Score: 2, Informative

    Be careful, but don't exclude local shops. As a techie, I "talk shop" with the owner and technician and interview them about their systems.

    Here's what I look for:

    1) What do you recommend for cases? I prefer heavier cases, I personally like enlight. They are sturdy and quiet.

    2) Power supply - what do they use? Are they any different? Truth is, they are different: L&C are junk and might fry your MB (I've seen it before). I like the Powmax 6100 with dual fans.

    3) Which Motherboards? I like ASUS - I've used them for years and never had problems. I hear positive things about tyan, supermicro, abit. I hear not-so-good about pcchips and epox which sell very cheap boards with all built-in functions (lan, sound, video, etc.)

    4) Memory? OEM vs. name brand is a religious debate, I personally spend the extra few bucks for the namebrand stuff. I've had OEM memory partially go out after a few months. In fact, I had a 1/2 blown 256M SIMM used in a Linux workstation by specifying the bad memory blocks...but I digress...

    5) Hard Drive? I've personally had Seagate and Western Digital both go out over the last 8 years. Quantum and Maxtor always had bad reps, but I hear they are better these days. Today I stick with Seagate, WD, and IBM drives (although IBM is out of the HD business, I hear)

    6) Monitor? I spend the extra few bucks for the larger size because you will eventually grow into it, and can never add it on later. 19" are pretty cheap now. Look at LCD if that works for you.

    7) Software? It should include Windows (or Linux :) or you should have the option of excluding the traditional OEM "value pack" to save a few bucks.

    Ask about their references - my local shop has dozens of "thank you" notes from local businesses and residents posted in his shop. Make sure you get along with the owner and trust your feelings. Shop around, don't be afraid to drive a little while to find a good store. After I moved to Florida recently, I called 9 stores before I found the one I like. After we talked for 20 minutes or so, he now offers me a professional courtesy discount (only 5%, but hey, it's nice).

    I will often buy parts and upgrade myself, but when I need a box built I use a local shop. Check reviews at tomshardware.com then check prices at shopper.com and pricewatch.com.

    Good luck!

  19. Re:Here you go on Home-Built vs. Store-Bought PCs · · Score: 1

    I use a local shop for immediate needs, and order the rest on-line. I like to get ideas at tomshardware.com then shop around using shopper.com or pricewatch.com

    My first OEM PC came from tdn.net which is grown a lot over the years. They're in New York state, and very helpful.

    But...when non-techie friends ask me, I tell them to look at Dell and Gateway. I personally don't like Compaq (or any Digital for that matter) or HP systems. I've had wierd hardware IRQ problems with (older) Compaq systems and don't like the extremely proprietary hardware they use.

    Hope this helps!

  20. Amortize & Insurance; VHS/Beta; On-Demand on Will Digital Cinema Wipe-Out Today's Movie Theaters? · · Score: 1

    I think it will eventually catch on and replace film, from an industrial and economic stand. It will be cheaper/easier/faster to distribute movies in digital form (and control access, showings via digital keys, etc.). The costs will be amortized over time like any expensive equipment like super computer CPUs or medical MRI/Laser equipment. Of course, it may not happen for 10 years (or more).

    I think there will always be pockets of classic film theaters, but they will not survive the populus. Look at the huge technology margin Beta had over VHS, and who won? The technology with the marketing powers behind it.

    I think when the studios and theaters find how they can show many more movies in a theater because they pay for the movie on a 'per view' instead of 'per reel' basis, we will see a larger variety of films showing in theaters (maybe online voting and discussion forums to decide which film to show next week at your local theater?) Most people would care about the color and texture of film vs. digital, but they will certainly enjoy the benefits and features of how fast selections pass through their local cinemas. Greater selections mean more viewings which mean more dollars for the box office.

    I wonder if theater timeslots will be like on-demand PPV channels, so a movie complex will have several theaters that are constantly changing their shows each week. They would need a close relationship with the recurring viewers, who would interact with the selection and viewing process. Imagine a local theater that had a different movie classic/favorite each week, would you go? One week Casablanca, next week is Afrian Queen, or Star Wars Episode IV, etc. Especially if they sell tickets on subsciption per month or advance tickets, they'll have their money up front.

    Of course, then they'll build a Starbucks (char-bucks) in the lobby of the theater and invite the viewers to participate in dynamic discussions on their favorite films (to selects next weeks features) while enjoying a $4 coffee and being studied as part of a focus group...

  21. Re:Apple //e 128K, 144K Floppy, hacked DOS 3.3 on Remembering the BBS · · Score: 1

    Yes, in fact this is the feature I speak of. You could also activate it by typing ctrl-s (to pause the scrolling text display), then ctrl-d (If I remember) and a 16 character code which would dump you into the command line prompt. There were several different backdoor codes. If you got a single character wrong, it would unpause, and return to scrolling the output text.

    I disabled this call, and set a flag that was checked from the GBBS command line, so I could discover who actually knew about this 'backdoor'.

    I also added a feature that I called macros, where a user could define several unique codes (2 or 3 chars) that would be substituted by a larger word. For example, they could type 'sd' then space, which would backup and replace the 'sd' with a larger word like 'Slashdot' -- of course Slashdot wasn't around 18 years ago.

    I also added some text animation features, like the spinning slash which would allow the user to embed crude animation in their messages. By typing '/s' in their message, the viewer would see a series of characters displayed with a 100 millisecond delay between characters. Spin was: / - \ | (with the delay in between).

    Do you remember Beagle Bros. ? I think I still have one of their ASCII charts, somewhere...

  22. Apple //e 128K, 144K Floppy, hacked DOS 3.3 on Remembering the BBS · · Score: 1

    My first system (and BBS) lived on one of the first //e systems, with dual 144k drives (with a hacked DOS 3.3 to read/write 44 tracks instead of the standard 40, of 16 sectors each).

    The software was written in Applesoft, a hacked version of GBBS with the 6502 assembly backdoor removed, or rather improved to alert the curious SYSOP to the presence of another hacker who actually had the correct 16 character backdoor password.

    In my mind, I'm still a goofy 16-year old kid (like most of us are/were) and staying up all night writing 6502 assembler, and missing my first class of each day in high school. Spending those nights developing real friendships with a few strange people, sharing our deepest thoughts and secrets while only knowing their alias, and while only typing back and forth in (C)hat mode. I remember actually going voice-mode (talking, that is) with a few people and being so shocked to hear their voices (and they mine). It never felt the same as the safe anonymity of just clicking those keys.

    I donated my Apple to an elementary school, years after I switched to UNIX (due to school and work). Although I know the system went to a good cause, I still miss my old friend. The sound of its cheerful "Beep" and that familiar tempo of the 5 1/4" drive whirling and clacking the head to the boot sector. I wonder if I can find a WAV file of that sweet sound, to play when I start my Linux/Windows systems today...Hmmm..

    Ahhhh the glory days...at least I have those few memories...the few I didn't burn out in college.

  23. 3rd Party Binary Distro -- "UntiedLinux" ? on RMS Condemns "UnitedLinux" per-seat License · · Score: 1

    What if a third party was to obtain and compile the sources to create their own binary distribution, and make this freely available under a name other than "UnitedLinux" ?

    Maybe somthing called "UntiedLinux" ?

    Of course the "UntiedLinux" distro. would need to be released with Source also ;)

  24. Re:Use IPSEC or Kerberos with *at least* 1024-bit on Building a Wireless Network for an Apartment Complex? · · Score: 1

    Yes, that's right, I'm using Ad-Hoc. Sorry for any confusion. I meant that I'm using the old laptop as a wireless interface to my roaming laptop.

  25. Use IPSEC or Kerberos with *at least* 1024-bit key on Building a Wireless Network for an Apartment Complex? · · Score: 4, Informative

    I setup a small AP in my apartment, only used by me, so far ;)

    I used an old 486 laptop running Linux 2.4.18 (RedHat base) with an Orinoco Silver card, using 40-bit WEP (which to a cracker, is slightly inconvenient at best) and IPTABLES, MAC filtering with IPSEC 3DES and 1024-bit keys.

    Be sure to use some kind of encryption better than WEP (like Checkpoint VPN, IPSEC, etc.) otherwise, it's only a matter of time before your users' account info is stolen.

    Also consider the kinds of antennas used on the AP. I actually bought the 3 dB loop antenna (size of a 10" plastic ruler) but I don't even need it within my own apartment (100' radius). I use both 2.4GHz phone and microwave with no major problems in my access. Mind you, I'm not using the link for heavy-use or Internet/media streaming. Here are some links to sites that helped me:

    Good luck with it, please post a link to your HOWTO when you get it running!