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No More Leap Second?

WerewulfX writes "CNN reports: "In a phenomenon that has scientists puzzled, the Earth is right on schedule for a fifth straight year." Update yeah, this is a repost. Whatever- it's a holiday. Nothing else to post :)

295 comments

  1. How many times... by Anonymous Coward · · Score: 0

    Are they going to post this story? Damn....

  2. Duplicate news... by Anonymous Coward · · Score: 0

    Here.

    I sent an email about that and nobody cared...

  3. Oh wow - no more leap second by Anonymous Coward · · Score: 0

    Ack - no more extra second to sleep in!!!

    does it matter?

  4. Hah. by Kirk+Troll · · Score: 4, Funny

    Those poor souls who are born on that second aren't going to have a birthday. T_T

    1. Re:Hah. by Karamchand · · Score: 1

      But instead the people born on 29th of February should be happy we have a leap year this time again.
      I should think about some present for my 18-year-old grandma soon..

    2. Re:Hah. by JPriest · · Score: 1

      Maybe we are just _slightly_ closer to the sun speeding up the total time to orbit by one second. Like one of those things in the mall where the quarter rolls around the cone before falling instide. It won't be long now.

      --
      Saying Java is nice because it works on all OS's is like saying that anal sex is nice because it works on all genders.
    3. Re:Hah. by rapidtransit · · Score: 1

      Is your 18-year-old grandma 72 or 76 earth years?

    4. Re:Hah. by Anonymous Coward · · Score: 1, Funny

      Who cares, she's legal now!

    5. Re:Hah. by Anonymous Coward · · Score: 0

      Umm so do I or don't I get my 10th Bday this year?

      because All I Want for My BirthDay is ...
      http://store.apple.com/1-800-MY-APPLE/WebObje cts/A ppleStore.woa/71301/wo/7i2J7jRBNhK03u3q82BfTnYMjO7 /2.0.7.1.0.5.3

      A 12 in powerbook

      ? 1GHz PowerPC G4
      ? 1.256GB DDR266 (256MB built-in & 1GB SO-DIMM)
      ? 40GB Ultra ATA drive @ 4200rpm
      ? SuperDrive (DVD-R/CD-RW)
      ? AirPort Extreme Card
      ? Professional 12 Backpack Case by Brenthaven
      ? Keyboard/Mac OS - U.S. English
      ? Rechargeable Battery - 12-inch PowerBook G4
      ? 12.1-inch TFT Display

    6. Re:Hah. by Lectrik · · Score: 1
      Who cares, she's legal now!

      but wouldn't your existing mean....
      I'm just gonna stop before i get images of old lady sex lodged in my brain
      --
      --- As to make my comment seem, by comparison, more intelegent... doodie doodie doodie poop poop poop!
  5. Nerds are not puzzled, however.... by rasafras · · Score: 5, Funny

    Slashdot dupes are, as always, right on time!

    1. Re:Nerds are not puzzled, however.... by rasafras · · Score: 1

      (link)

    2. Re:Nerds are not puzzled, however.... by DJStealth · · Score: 1

      Actually this is the REAL dupe, since slashdot subscribers(tm) actually saw this article first, then they got the other. (j/k)

    3. Re:Nerds are not puzzled, however.... by Jeff+DeMaagd · · Score: 1

      This is slashdot, where the right editor knows not what the left editor is doing, and like many organizations, the very top admin knows not what his team is doing!

  6. Dupe... by Smelly+Jeffrey · · Score: 0, Redundant
  7. la de da da by Anonymous Coward · · Score: 0

    See any serious problems with this story? Email our on-duty editor.

  8. But what about... by Gothmolly · · Score: 5, Funny

    the dupe second?

    --
    I want to delete my account but Slashdot doesn't allow it.
    1. Re:But what about... by illuminata · · Score: 2, Funny

      What about the dupe second?

      --


      Until Slashdot fixes the funny modifier, use insightful or interesting. The poster knows your intentions.
    2. Re:But what about... by illuminata · · Score: 2, Insightful

      The person who modded me redundant gave me a good laugh, because I can't tell if they got the joke or really thought that it was redundant in a bad way.

      Tricky shit, my friend. Tricky shit.

      --


      Until Slashdot fixes the funny modifier, use insightful or interesting. The poster knows your intentions.
    3. Re:But what about... by Anonymous Coward · · Score: 0

      What's really funny is that you wound up 1 karma in the hole because +1 funny nets none. Not as bad as your parent poster though, who's 2 in the hole.

      The least they could have done was remove the penalty from downmods that are being applied against +1, funny.

      Way to discourage humor, /.

    4. Re:But what about... by illuminata · · Score: 1

      No kidding, I don't know how many times that I've had shitty karma because of their anti-funny policy.

      It's crazy though, for about a month I've had excellent karma, with only a small amount of very quick drops. This is despite not being able to use my karma bonus due to what seems to be an $rtbl.

      --


      Until Slashdot fixes the funny modifier, use insightful or interesting. The poster knows your intentions.
  9. LAME DUPES, EVEN WHEN TOLD IT WAS SO! by Blymie · · Score: 1, Interesting

    MORONS!

    This is a dupe. Not only that, I emailed about this being a dupe, 10 minutes before it went live.

    TEN MINUTES!

    Not only does Slashdot not even bother to correctly check for dupes, they don't even read their email that says "YOUR UPCOMING STORY IS A DUPE!".

    Just what is the "email the editor if you see a problem with this story" link for, then, anyhow?

    Just for the hell of it?

    BAH!

    1. Re:LAME DUPES, EVEN WHEN TOLD IT WAS SO! by Blymie · · Score: 1, Informative


      What the hell is this crap? Redundant???

      This isn't a normal "I was too lazy to properly check for dupes" situation.

      No.

      This is a situation where someone, who is supposed to be ON DUTY and who are supposed to READ their emails about potential problems with the story they just posted, neglecting their duty.

      Honestly, the story is posted. They only have to pay attention for a total of 15 minutes until it goes live. Whomever it was, didn't.

      I'm quite willing to bet that I wasn't the only person that pre-emptively emailed about this being a dupe either.

      HELLO? What is the problem? I doubt I'll donate to Slashdot again!

    2. Re:LAME DUPES, EVEN WHEN TOLD IT WAS SO! by subk · · Score: 1

      This is the first time I have ever made a "Mod parent up" post, but AMEN BROTHER!

      --
      Now, if you'll excuse me, I have backups to corrupt.
    3. Re:LAME DUPES, EVEN WHEN TOLD IT WAS SO! by Anonymous Coward · · Score: 0

      I'll second that MOD UP. Slashdot doesn't get my money until they do the "edit and check" thing.

    4. Re:LAME DUPES, EVEN WHEN TOLD IT WAS SO! by Anonymous Coward · · Score: 0

      The preceding is an excellent example of an extreme addiction to slashdot. And please, have some cheese with that wiiiine.

    5. Re:LAME DUPES, EVEN WHEN TOLD IT WAS SO! by digital+bath · · Score: 1

      20% Informative
      20% Flamebait
      20% Overrated

      That sure is an interesting moderation score. What happened to the other 40%?

      --
      find / -name "*.sig" | xargs rm
    6. Re:LAME DUPES, EVEN WHEN TOLD IT WAS SO! by JamesP · · Score: 0

      Of course, new stories get rejected in favour of dupes...

      --
      how long until /. fixes commenting on Chrome?
  10. No more leap second... by Anonymous Coward · · Score: 0

    ...but the dupes keep on coming! We'll always have the dupes. You can't take that away.

  11. You know what that means??? by DAldredge · · Score: 0, Redundant

    This proves that the Earth is NOT female.

    1. Re:You know what that means??? by urmensch · · Score: 1

      or just not pregnant!

    2. Re:You know what that means??? by Jediman1138 · · Score: 1

      So he gets moderated down for being redundant, yet somehow, this story doesn't?

      --

      nothing.can.stop.me.now

    3. Re:You know what that means??? by Anonymous Coward · · Score: 0

      It was redundant to the equivalent joke I made last time the story was up! :-)

    4. Re:You know what that means??? by haggar · · Score: 1

      ..or italian ;o)

      --
      Sigged!
    5. Re:You know what that means??? by DAldredge · · Score: 0, Flamebait

      The mods hate me.

      But back to BSU on BZFLAG!!! Nic - BSD-IS-DYING

  12. And slashdot is still by originalTMAN · · Score: 0, Redundant
  13. What if... by Anonymous Coward · · Score: 5, Funny

    Who says that the extra second wasn't just deja vu? I know that I could have sworn I saw this post before.

    1. Re:What if... by taernim · · Score: 1

      It means they just changed the Matrix.
      Oh no....

      --
      "PC Load Letter? What the $@#% does that mean?!"
  14. Missed opertunities by Bishop,+Martin · · Score: 0, Redundant

    I would have been funny if they posted a dupe
    one second after the original post...

    --
    Setec Astronomy
  15. Mother Nature by NetNinja · · Score: 1, Insightful

    The Earth has the uncanny ability to heal itself.

    1. Re:Mother Nature by Anonymous Coward · · Score: 0

      insightful? as far as the earths orbital period is concerned, it's a chunk of rock circling a ball of gas.

      There was no damage to cause this, and no ability to heal it.

    2. Re:Mother Nature by Anonymous Coward · · Score: 0

      And why this bullshit is insightful or interesting?

    3. Re:Mother Nature by Anonymous Coward · · Score: 0

      There's at least one pestilence she hasn't managed to shake in 4+ million years of trying.

    4. Re:Mother Nature by Anonymous Coward · · Score: 0

      What the hell are you talking about? I wish I could spout shit out my ass and get some karma.

    5. Re:Mother Nature by Detritus · · Score: 4, Insightful

      Heal itself? That implies that there is something natural about the 24-hour day. The Earth's rotation rate has been decreasing for billions of years. An Earth day was approximately 18 hours in duration 900 million years ago.

      --
      Mea navis aericumbens anguillis abundat
    6. Re:Mother Nature by mixmasta · · Score: 1

      Is that true? That's a HUGE change in less than a billion years. Looks like the people in the future are going to have to get used to hot days and cold nights.

      At least there will finally be enough hours in the day!

      --
      #6495ED - cornflower blue
    7. Re:Mother Nature by ts4 · · Score: 1

      Wow! That is so cool that you were actually there to measure the length of a day! So, like, you've got a really good pension plan, right? Do you still have the same clock?

      Or is this just more uniformitarian assumptions masquerading as science?

    8. Re:Mother Nature by edwdig · · Score: 1

      I don't think you can really say that.

      We can estimate how long a day was in the past based on current trends. But as this article shows, that may not be accurate. The article says the discovery of leap seconds is a side effect of the invention of the atomic clock in 1955. That means we've had not quite 50 years to observe trends. For the last 5 the trend has been different than in the past, and we have no clue why. That's over 10% of the sample data that breaks the trend, which isn't a small amount.

      I'd say we can't even make a remotely close guess at how long a day was 900 million years ago.

    9. Re:Mother Nature by Detritus · · Score: 1

      See Variations of LOD and primary geodynamical parameters throughout the Earth's history (Abstract, PDF file) VARGA, P.; DENIS, C., EGS XXVII General Assembly, Nice, France, April 2002.

      --
      Mea navis aericumbens anguillis abundat
    10. Re:Mother Nature by clambake · · Score: 1

      Wow! That is so cool that you were actually there to measure the length of a day! So, like, you've got a really good pension plan, right? Do you still have the same clock?

      Or is this just more uniformitarian assumptions masquerading as science?


      Oh no, he was there... I saw him. He was a total ass back then... knocking out all the hot women and dragging them back to his cave without even killing them dinner first. And, sonney, you think your leap-seconds are bad these days? Well, in my day, on the way to school we had to literally leap in the air for more than ten minutes to avoid the snapping jaws of the dinoraptors... and this was UP HILL leaps, in the SNOW... both ways!

    11. Re:Mother Nature by prockcore · · Score: 1

      An Earth day was approximately 18 hours in duration 900 million years ago.

      Hah! that's nothing, a Work Day was approximately 18 hours just 100 years ago.

    12. Re:Mother Nature by ljavelin · · Score: 1

      The article says the discovery of leap seconds is a side effect of the invention of the atomic clock in 1955.

      Um, the leap second wasn't discovered... it was conceived.

      However, there is significant evidence that the earth is slowing at a *somewhat* predictable rate, thanks to a couple of millennia of astronomical records. No atomic clock necessary.

      I wouldn't worry about the earth slowing down too much - it'll be a long long time before we have a day that's 24:00:01 long. I suppose that the day right now is about 24:00:00.002 or something... and it took a good 150 years for the length of the day to grow by 2 milliseconds.

      I know one thing - I'm using that extra time for ME!

    13. Re:Mother Nature by Anonymous Coward · · Score: 0

      yeah and microsoft wasn`t around then as well.

  16. This article... by Cyno01 · · Score: 0, Redundant

    must've been posted the first time on the leap second, so it no longer exists and had to be reposted.

    --
    "Sic Semper Tyrannosaurus Rex."
  17. WTF? by Anonymous Coward · · Score: 0

    Slashdot isn't that complex of a site. You'd think that someone could take that extra 10 brain cycles a day to weed out dupes. Quality is just going downhill lately. When it's not a dupe, it's yet another boring SCO story.

    Any suggestions on a sucessor to slashdot?

    1. Re:WTF? by LnxAddct · · Score: 2, Interesting

      How about instead of replacing slashdot, Taco just gives a hundred or so random subscribers the ability to mod a story as a dupe before it is officially posted for everyone else to read? It wouldn't be much harder to implement then mod points or metamoderation. If it wasn't a dupe then noone would have to do anything, but if it was a dupe then those "lucky" few could get someone's attention by clicking a "This is a dupe" link. Regards, Steve

    2. Re:WTF? by Neophytus · · Score: 1

      There is an ability to report errors to 'daddypants', although it is just a remailer to the people who posted the article in the first place and was mainly intended for typos and 404s. Needs a 'this is a dupe' automated thing beside it.

  18. MOD PARENT UP by Anonymous Coward · · Score: 0

    +1 Insightful

  19. Change in acceleration? by John+Seminal · · Score: 1, Redundant

    So, does this mean that the acceleration of the earth has changed, and if so, does that that mean we will continue to slow? If we do slow, won't the gravity of the sun effect out orbit? Will we see more el ninjo effects, or other wierd phenomenon? One second could be a big deal.

    --

    Rosco: "If brains were gunpowder, Enos couldn't blow his nose."

    1. Re:Change in acceleration? by NoData · · Score: 5, Funny

      Will we see more el ninjo effects

      I hope so! El Ninjo is the bad-assest Mexican Ninja ever!

    2. Re:Change in acceleration? by zarr · · Score: 1
      One second could be a big deal.

      No, It isn't.

    3. Re:Change in acceleration? by 77Punker · · Score: 1

      Mr.Chekov: Keptin! Our Orbit is decaying! Kirk: More power to the impulse engines! Scotty: That's all she can take, cap'n!

    4. Re:Change in acceleration? by 77Punker · · Score: 0, Redundant

      Dammit!

      Mr. Chekov: Keptin! Our orbit is decaying!

      Kirk: More power to the impulse engines!

      Scotty: That's all she can take, cap'n!

    5. Re:Change in acceleration? by Osmosis_Garett · · Score: 2, Funny

      One second out of 31536000 is not considered significant.

    6. Re:Change in acceleration? by k4_pacific · · Score: 1

      As the sun gives up mass to solar wind and matter->energy conversion. It will get lighter and thus have less gravitational pull. Probably not much though. Likewise, several tons of meteorites and space dust fall to earth every year and gradually make it heavier, increasing its gravitational pull, again probably not a significant effect. But over enough time these effects could change the length of a year.

      "Its only a matter of Time and Newsweek"

      --
      Unknown host pong.
    7. Re:Change in acceleration? by Stackster · · Score: 1

      No, but one second out of 86400 is.
      The leap second has nothing to do with the length of the year (the time it takes for the earth to orbit the sun), whatsoever. This is instead handled by leap days.
      The leap second is used to keep the day (rising and setting of the sun, tea-time, midnight and stuff) synchronized with UTC.

      --

      There are 010 kinds of people. Those who understand octal, those who don't, and 06 other kinds of morons.
    8. Re:Change in acceleration? by Otter · · Score: 1

      Yes, but that leap-second isn't applied every day. It's still a one second correction per year, or .00274 seconds per 86400 second day.

    9. Re:Change in acceleration? by Dharmy · · Score: 1

      It is if it's the last one. Otherwise we wouldn't have all this new year fuss.

    10. Re:Change in acceleration? by xaaronx · · Score: 1

      "El Ninjo" is Spanish for "the Ninjo"!!!

      --
      It's amazing how much "mature wisdom" resembles being too tired. - Robert Anson Heinlein
    11. Re:Change in acceleration? by Stackster · · Score: 1

      Yes. But no. The leap second corrects the _day_ from being one second off, which is one second out of 86400. What that second is, spread out over one year (since it has nothing to do with the year whatsoever, except that it usually is applied on the last day of June or December), is not very relevant at all.

      --

      There are 010 kinds of people. Those who understand octal, those who don't, and 06 other kinds of morons.
  20. Happy Dupe Year! by Anonymous Coward · · Score: 0

    Many happy reposts...

  21. What do you think editors are for?! by Anonymous Coward · · Score: 0

    Reading Slashdot? Checking stories to see if they've been posted? Reading emails from paying subscribers about stories being duplicates? No, of course not. This is Slashdot.

  22. Re:Getting slow ALREADY! REPOST: by shibbydude · · Score: 0, Troll

    Karma Whore! I can't believe that people still think that large sites like CNN will become slashdotted. It shows ignorance on your part and it infuriates me to see duplicate posts of an article. Your post was not helpful. Save the whoring for a time when a server really is in jeopardy.

    --
    We're only gonna die from our own arrogance, that's why we might as well take our time...
  23. MOD ABUSE ALERT by Anonymous Coward · · Score: 0

    any post that cricizes the crappy job the editors do around here, especially for paying subscribers is CENSORED.

    this should be modded up so that the truth is known and the lies exposed

  24. Headlines on monitors everywhere: by Jediman1138 · · Score: 0, Offtopic

    Slashdot Dupes Another Story; baffles Readers Everywhere.

    --

    nothing.can.stop.me.now

  25. Right on time by Anonymous Coward · · Score: 0

    And the giant flood of lame-ass posts about dupes is right on time too.

    Glad I could read about duplicate stories 117 fucking times.

  26. Late trains by immel · · Score: 1, Flamebait
    "In a phenomenon that has scientists puzzled..." WOW! This is just like the sensation I get when I go to the U.S and a train is on time.
    *puts on ballistic nylon in preparation for incoming flak*
    --

    10 Bits= $.25
    100 Bits= $.50
    110 Bits= $.75
    1000 Bits= 1 byte
    1. Re:Late trains by lenulus · · Score: 1

      Not to be a dick, but 1024 bits == 1 byte, not 1000...

    2. Re:Late trains by Chmarr · · Score: 2, Insightful

      Actually, 1024 bits is 128 bytes, not 1, nor 1000.

    3. Re:Late trains by 3lb4rt0 · · Score: 0

      that'd be 8 bits = 1 byte

      1024 bytes = 1 kilobyte

      etc etc etc

      not that it really matters :D

    4. Re:Late trains by Anonymous Coward · · Score: 0

      Well, be thankful. when the trains run on time, it's a sure sign of fascism. The us is well on the way, but until the 8:57 shows at 8:57, it's not there yet.

    5. Re:Late trains by Anonymous Coward · · Score: 0

      I went to school for years to become an Engineer, then got the CCNE and (god help me) MCSE before I realized that none of this had anything to do with trains.

      *sob*

    6. Re:Late trains by DJStealth · · Score: 0, Troll

      Not to be a bigger dick, but 1024 bits = 1 kbit, not 1 byte, not 1 kbyte.

    7. Re:Late trains by UserGoogol · · Score: 1

      All non-cash numbers were binary in his sig. Then it makes sense. A quarter is two bits, remember?

      And, of course, your message is wrong in isolation too, but people have already told you that.

      --
      "Never attribute to malice that which can be adequately explained by stupidity." -- Hanlon's Razor
    8. Re:Late trains by pdbaby · · Score: 1

      You all deserve your geek passes revoked! Either you forgot /> tags, or you do not realise:

      10 Bits= $.25 100 Bits= $.50 110 Bits= $.75 1000 Bits= 1 byte
      2 bits, 4 bits, 6 bits, 8 bits.
      The numbers, of course, are in binary. For shame!

      --
      Global symbol "$deity" requires explicit package name at line 2. - If only $scripture started "use strict;"
    9. Re:Late trains by k4_pacific · · Score: 1

      Americans still ride trains?

      --
      Unknown host pong.
    10. Re:Late trains by tesmako · · Score: 1

      1000 bits is one byte when counting in binary.

      The fun part about the sig is that 'bit' is apparently also a coin, worth $0.125. All the equalities are correct if the first three are interpreted as the coin and the last as computer-style 'bits' (except a byte might not be 8 bits on *all* hardware, hardware where it is not true is quite rare at this point however :).

      A quite neat sig all in all, decently clever enough to make people think (or in some cases apparently not think).

    11. Re:Late trains by Yokaze · · Score: 1

      >(except a byte might not be 8 bits on *all* hardware, hardware where it is not true is quite rare at this point however :)

      Ummh... the smallest adressable unit for an ARM-processors is a 16bit. I'd say it is quite common. Not on the desktop, but still.

      --
      "Between strong and weak, between rich and poor [...], it is freedom which oppresses and the law which sets free"
    12. Re:Late trains by tesmako · · Score: 1

      I am a bit suprised. Strictly speaking exactly what a byte is is somewhat poorly defined. At least the reference I just looked up has a load byte and store byte (where byte has the common 8-bit meaning). If one uses the definition you have though one can find a lot of examples yes, the basic MIPS and a lot of its descendants are notable.

      I actually meant to refer to really old computers that could have a word-size of 12 bits and such, making a 8-bit memory location truly odd. I kinda ignored the modern RISCy machines since they can easily handle 8-bit data and typically have a 8-bit chars in a C implementation. I admit that I probably were a bit off though :)

    13. Re:Late trains by immel · · Score: 1

      DINGDINGDING!You are correct. This is the intended meaning of my sig. The whole "1000 bits= 1 byte" was intended to represent that, just as bits make up a byte, pieces of 8 (also known as "bits") make up a dollar.

      --

      10 Bits= $.25
      100 Bits= $.50
      110 Bits= $.75
      1000 Bits= 1 byte
    14. Re:Late trains by pdbaby · · Score: 1

      ...and I'm not even american! Do I get my medal now?

      --
      Global symbol "$deity" requires explicit package name at line 2. - If only $scripture started "use strict;"
    15. Re:Late trains by Da+Masta · · Score: 1

      Both of you really missed that joke. Decimal 8 is binary 1000. I'm fairly certain 8 bits is a byte.

    16. Re:Late trains by jrockway · · Score: 1

      You mean 1 Kib, not 1 Kb.

      --
      My other car is first.
    17. Re:Late trains by prockcore · · Score: 1

      The appropriate response was "There are only 10 types of people.. those who understand binary and you"

    18. Re:Late trains by Anonymous Coward · · Score: 0

      What, would you regularly ride trains in the states? Things are a little different here.

    19. Re:Late trains by Chmarr · · Score: 1

      Well, I probably didn't even SEE The joke, because the joke is in the sig, and I have sigs turned off... I keep forgetting that :)

    20. Re:Late trains by Anonymous Coward · · Score: 0
      I'm fairly certain 8 bits is a byte.


      It's usually reffered to as an octet though, in order to avoid confusion when on those machines where there are some other number bits (seven is pretty common) in a byte.
    21. Re:Late trains by Anonymous Coward · · Score: 0

      The fascists didn't make the trains run on time, they simply claimed they did (who's going to disagree?)

  27. I have received a decyon emission... by Anonymous Coward · · Score: 0

    ...with repeating patterns of the message '2.' It has lead me to the shocking conclusion that Slashdot might be caught in an endlessly repeating time loop. I'm not crazy! What can we do about it?

  28. Insanity! When will it end? by fizban · · Score: 0, Redundant

    In what has completely baffled geeks and nerds of the world, CmdrTaco has proven once again for the nth straight year that he can post duplicate stories right on time.

    http://science.slashdot.org/article.pl?sid=03/12 /3 0/2317231

    --

    +1 Insightful, -1 Troll. What can I say, I'm an Insightful Troll.

  29. 5 extra seconds by e-ville · · Score: 1, Interesting

    Scientists have known about this leap second since the early 70s. So there has been atomic clocks made that take leap seconds into account. If my calculations are correct, doesn't this mean that there may be atomic clocks around that contain 5 extra seconds?

  30. relax. by Anonymous Coward · · Score: 0

    Calm down... breathe... Think happy thoughts.

    there, isn't that better?

  31. Can someone please explain to me... by Judg3 · · Score: 2, Interesting

    Exactly how do they figure out where the Earth is supposed to be down to a given second?
    I understand Atomic clocks and how they work - but I don't understand how scientists can deduce where the earth should be to the exact second and correct it as such.

    --
    Looking for hardware (Currently need: Large Etch-a-Sketch) Have one? See my journal!
    1. Re:Can someone please explain to me... by Anonymous Coward · · Score: 0

      ADD isn't a joke. It's a tragedy. A whole society is drugging its hunter children up to the eyeballs so that the farmer kids can continue to be mindless drudges. Google for M0-theory.

    2. Re:Can someone please explain to me... by Anonymous Coward · · Score: 0

      Not selling enough Drugs, gotta come out with another hype and sell more "Legal" drugs.

    3. Re:Can someone please explain to me... by ByteSlicer · · Score: 3, Informative

      Very easy: Take a telescope, look at some star, and check each year if it is where it should be according to calculations using atomic clock time.

    4. Re:Can someone please explain to me... by ljavelin · · Score: 1

      Exactly how do they figure out where the Earth is supposed to be down to a given second?

      In a nutshell, astronomical observations.

      OK OK, that isn't "exactly how they do it", but it should give you an idea of how they do it. Maybe someone else can provide more detail.

    5. Re:Can someone please explain to me... by 26199 · · Score: 1

      It's actually very straightforward... 'where the Earth is supposed to be' is calculated assuming that the length of a day/year doesn't change, which isn't quite true.

      Both measurement of time and of the Earth's position need to be accurate enough for this to be a problem... apparently they are.

    6. Re:Can someone please explain to me... by Anonymous Coward · · Score: 0

      Again, for the 1 millionth time, the leap second has NOTHING to do with the movement of the earth in orbit. The leap second has been added due to the precession (slowing) of the Earth's rotation. There are a multitude of ways to measure this, as Google will show anyone with the inclination to use it.

      Variations in revolutional movement are too small to worry about a leap second.

    7. Re:Can someone please explain to me... by Anonymous Coward · · Score: 2, Funny

      Each year German scientists leave a beacon along Earth's orbit. This crusty marker stays there until it is picked up next year, and the elapsed time is measured. This year, the time was different than expected. It's called the Hansul-Gretel algorythm.

      He Schutze, He Scores!

    8. Re:Can someone please explain to me... by Eric+Damron · · Score: 1

      And how do you determine that the telescope is pointed at exactly the correct angle?

      --
      The race isn't always to the swift... but that's the way to bet!
    9. Re:Can someone please explain to me... by IceFoot · · Score: 2, Informative

      It has nothing to do with "where the Earth is supposed to be". This is *not* about the earth orbiting the sun.

      This is all about the earth spinning on its axis, 24 hours/revolution. As others mentioned, you can figure out quite precisely when the earth has made one revolution about its axis, by looking at a star.

      The point is, slight variations in the earth's rotational speed on its axis mean that it doesn't take exactly 24 hrs 0 min 0.000 000 sec to turn once.

      At the end of the year, they take all the variations and add them up. Usually the yearly variation is a fraction of a second, resulting in a possible leap-second. BUT (this news item informs us) the recent variations haven't been big enough to require a leap-second.

      The Earth is just a big top spinning on its axis, a mechanical object. An analog object. No wonder its rotational speed varies! It isn't digital!

    10. Re:Can someone please explain to me... by Jeff+DeMaagd · · Score: 1

      I suppose the white coats have telescope pointing mechanisms that are accurate enough to to point to a such a high repeatably. How such a mechanism is designed is beyond me right now.

    11. Re:Can someone please explain to me... by fulldecent · · Score: 1
      Is there a documentation of these extra seconds added to time? and Would this in any way effect the processing of UNIX timestamps? if not why not

      thanks

      --

      -- I was raised on the command line, bitch

    12. Re:Can someone please explain to me... by ByteSlicer · · Score: 1

      There are some large radio telescopes that have a fixed dish. So it would be just a matter of seeing some point shaped radio source move into focus at every earth rotation, and timing it.

    13. Re:Can someone please explain to me... by Virtex · · Score: 2, Informative

      Taken from the man page for ctime on my Linux box:

      tm_sec: The number of seconds after the minute, normally in the range 0 to 59, but can be up to 61 to allow for leap seconds.

      So it would seem Linux, at least, has provisions for leap seconds. I think the same thing happens on UNIX as well, but I'm not somewhere where I can verify that right now.

      --
      For every post, there is an equal and opposite re-post.
    14. Re:Can someone please explain to me... by Tony+Hoyle · · Score: 1

      I doubt you'd ever see them, though, as they're calculated on the fly... when your kernel was built they hadn't decided whether to have a leap second this year or not.

      Maybe if you sync with an NTP server it can trigger it?

      I hope they don't do it a lot though as calculating a date from a time_t would get increasingly inaccurate, unless very OS had a list of leap seconds and added them as needed (maybe they do?)

    15. Re:Can someone please explain to me... by Eric+Damron · · Score: 1

      But it would seem to me that any small shift of the telescope would cause a large error.
      What if the telescope's foundation settles?

      I'm thinking that one cannot take much for granted when measuring the position of the Earth to within one second of time.

      Our continents are drifting. One would think that plate tectonics wouldn't have much of an effect, but again we are measuring the position that the earth is suppose to be in within one second of time. Wow! That can't be easy.

      --
      The race isn't always to the swift... but that's the way to bet!
    16. Re:Can someone please explain to me... by LittleBigLui · · Score: 1

      take multiple telescopes on multiple continents, average (or whatever) the results.

      --
      Free as in mason.
    17. Re:Can someone please explain to me... by prockcore · · Score: 1

      Very easy: Take a telescope, look at some star, and check each year if it is where it should be according to calculations using atomic clock time.

      Ok.

      01:42:32.682 : Star is currently.. up there... check.

      Everything's ok over here.

    18. Re:Can someone please explain to me... by Anonymous Coward · · Score: 0

      I'm thinking that one cannot take much for granted when measuring the position of the Earth to within one second of time.
      Why do you think a second of time isn't a huge quantity?

      The Earth hurtles through space fast enough to make a huge revolution around the sun (it's 92.9 million miles away) in under 366 days -- that's over 580,000,000 miles every 8784 hours.

      That means that if the Earth leaves out ONE SECOND of movement, it loses almost 20 miles.

      Do two telescopes 20 miles apart have the same view of the heavens? No! They are more than a fifth of a degree off -- that's HUGE.

      [Remember, the heavens shift 360 degrees as you make your way around the circumference of the Earth - 24,901 miles - which makes it 0.289 degrees to every 20 miles.]

      Would scientists notice if, by atomic time, the CURRENT view (as opposed to the view two hours ago, which was very different) is supposed to be occuring TWENTY MILES away, and here a version is occuring that's a fifth of a degree off? HELL YEAH they'd notice! 0.289 degrees is huge!

      If you're looking up at the night sky and get to push a button which toggles a fifth of a degree change in the starscape, YOU'D notice the effects easily -- and buddy, you're no telescope.

      (You should ignore the moon, though, because it 'tags along' with us and isn't an indicator of our location with respect to outside our solar system.)

      Our continents are drifting.
      By 20 miles a year or a matter of inches?

      calculate before you post!!!

    19. Re:Can someone please explain to me... by Eric+Damron · · Score: 1

      "That means that if the Earth leaves out ONE SECOND of movement, it loses almost 20 miles."

      20 miles is nothing when compaired to the distance in the Earth's orbit!

      "Do two telescopes 20 miles apart have the same view of the heavens? No! They are more than a fifth of a degree off -- that's HUGE."

      Your 1/5 of a degree number seems meaningless. It may be 1/5 of a degree from the Earths core to two points 20 miles apart on its surface but so what? We are trying to calculate the position the Earth is along its orbit.

      To do that you need to look at the angle that two lines form. One line from the Sun to the Earth and the other from the Sun to some very distant object (some other star).

      I assure you that 20 miles will not create a 1/5 degree variance. Do the math before YOU post.

      I'm not saying that it can't be done. Obviously it can but I don't think that you or I are just going to whip out our slide rules and do that calculation.

      --
      The race isn't always to the swift... but that's the way to bet!
    20. Re:Can someone please explain to me... by Anonymous Coward · · Score: 0

      Idiot. The issue *is* about the speed at which the Earth
      rotates about the Sun.

      By the way, the Earth does *not* take 24 hrs 0 min 0.000 000 sec (sic) to turn once. It apparently hasn't
      occured to your pea brain that the rotation around the
      Sun adds, after one year, one sunrise/sunset pair that isn't
      caused by the Earth's rotation about itself.

  32. Obviously an Illuminati plot. by unsigned+integer · · Score: 1

    Where's JC Denton when you need him!?

    1. Re:Obviously an Illuminati plot. by Tandoori+Haggis · · Score: 1

      The new record "Order of the Illuminati" available June 9, 2003
      In Europe through Scarlet Records & in Japan on King Records

      http://www.agentsteelonline.com/

      --
      My hyperlinks aren't worth the paper they're printed on.
  33. Re:Cowboyneal is a RACIST by fastidious+edward · · Score: 0, Offtopic

    The fact he seemed to have got so upset is ridiculous!

    Feeding the trolls only encourages them. Perhaps something like a 'super offensive' troll rating should be introduced so when modded to the extent a post was a 'super troll' the IP address would be logged somewhere publically available, that way even ACs wouldn't get around it.

    Just a thought.

    Although OT, I do not post AC, but have disabled my karma-bonus.

    --

    karma karma karma karma karma chameleon, you come and go, you come and go.
  34. Damn, there goes my great idea. by MinorHeadWound · · Score: 2, Funny

    And I only had 107,993 years left before my nefarios plan to come to work a half-hour late every day.

  35. but maybe.. by Anonymous Coward · · Score: 0

    the dupe was an intentional one to get slashdot on the front of google news?

  36. Am I surprised.. by Inoshiro · · Score: 0, Redundant

    That CmdrTaco is the first-duper of 2004? No..

    --
    --
    Internet Explorer (n): Another bug -- that is, a feature that can't be turned off -- in Windows.
  37. What is wrong here? by DJStealth · · Score: 2, Funny
    scientists in 1972 started adding an extra "leap second"
    Scientists in 1972 did too much acid and other drugs
  38. How do they do know that it?s not gravity waves... by Anonymous Coward · · Score: 0

    ...or some such is messing with the cesium. Maybe the atomic clocks are wrong.

  39. last year by phazei · · Score: 4, Funny

    this article is soooo last year

  40. OT: Bits and bytes by Anonymous Coward · · Score: 0

    Traditionally, a byte is "only" 8 bits. A nibble, is 4 bit.

    There is also something called a word, I guess its 4 bytes for 32bit machines, but I am not sure of it.

    Hence:

    • 1 bit == zero or one.
    • 4 bit == nibble.
    • 8 bit == byte.
    • 1024 bytes == 1 kilobyte.
    • 1024 kilobytes == 1 megabyte.
    • 1024 megabytes == 1 gigabyte.
  41. ummm, the moon? by ignipotentis · · Score: 2, Interesting

    I don't think this should be that suprising. It is widely known that the moon's orbit is increasing. The effects of this is slowly causing the tides to be less severe. It is also slowing the earth's rotation. Eventually the moon will be in orbit around the equator, and there will be no more tide. I think there might be a good chance that the loss of the leap second could be related to this.

    --
    Don't waste time... procrastinate now!
    1. Re:ummm, the moon? by Anonymous Coward · · Score: 0

      The Sun also provides tides don't forget. And the Lunar effect would be affecting the duration of the day, not the year, unless the Earth-Moon system is changing mass somehow? I'm sure all those anti-space people will be blaming lost mass from rocket launches, although they forget about the mass being added by meteors.

    2. Re:ummm, the moon? by spinflip · · Score: 1

      I'm pretty sure there would still be tides even if the moon was over the equator.

    3. Re:ummm, the moon? by Anonymous Coward · · Score: 0

      I'm pretty sure there would still be tides even if the moon was over the equator.

      Yes, there would be.

      1. The angle of rotation of the moon has nothing to do with tides.

      2. The angle of rotation of the moon is not changing anyways.

    4. Re:ummm, the moon? by RenaissanceGeek · · Score: 1

      Are you sure that you don't mean geosynchronous orbit?

      Of course, that would require that the angle of inclination of the moon's orbit around the earth matched the angle of inclination of the earth's spin, which I'm pretty sure it doesn't.

      In which case, we'd wind up with tides that moved North-South, instead of East-West, on an exact half-day period.

      Not that I care: my great-grandchildren will be dead and gone LONG before that day comes. (but will the earth's tectonic plates be fused yet?)

      --
      What is the difference between a small revolutionary change and a large evolutionary change?
    5. Re:ummm, the moon? by amRadioHed · · Score: 1

      True. What he should have meant to say is that eventually the earth will be tidally locked with the moon (as the moon is already with the earth) and so the moon will no longer appear to rotate around us from the earth's PoV.

      With the moon in geosynchronous orbit around us, we would naturally not experience any more tides from the moon, but we would still have the (lesser) tides caused by the sun.

      --
      We hope your rules and wisdom choke you / Now we are one in everlasting peace
    6. Re:ummm, the moon? by Anonymous Coward · · Score: 0



      Not that I care: my great-grandchildren will be dead and gone LONG before that day comes.

      Yes, but what about your GREAT-great-great-great-great-great-great-great-gr eat-great-great-great-great-great-great-great-grea t-great-great-great-great-great-great-great-great- great-great-great-great-great-great-great-great-gr eat-great-great-great-great-great-great-great-grea t-great-great-great-great-great-great-great-great- great-great-great-great-great-great-great-great-gr eat-great-great-great-great-great-great-great-grea t-great-great-great-great-great-great-great-great- great-great-great-great-great-great-great grand-children's billionth descendents?

      Won't somebody please think of the children!

      travels through space has slowed ever so slightly for millennia. To make the world's official time agree with where the Earth actually is in space, scientists in 1972 started adding an extra "leap second" on scientists repeated the procedure. But in 1999, they discovered the Earth was no longer lagging Institute for Science and Technology in Boulder, spokesman Fred McGehan said most scientists agree the Earth's orbit around the sun has been gradually slowing for millennia. But he said they don't have a good explanation for why it's include the tides, weather and changes in the unexpected consequence of the 1955 invention of the atomic clock, which use the electromagnetic radiation emanated by Cesium atoms to measure time. It is Coordinated Universal Time was implemented in 1972, superseding the astronomically determined a big deal, affecting everything from communication, navigation and air traffic control systems to the computers that link global financial markets.

  42. Babies by blike · · Score: 5, Funny

    Spare me please. You all are the biggest bunch of need-something-to-whine-about babies I have seen in a good long time. So what if something was double posted? It takes half a second to scan the headline and realize that its a repeat. You take more time crawling all over each other to be the first to whine/complain/joke about the repeated story. For God sakes, ignore the post if your time is so precious! "HELLO? What is the problem? I doubt I'll donate to Slashdot again!" That is the saddest sentence I have ever had the misfortune of reading. Slashdot pours all kinds of blessings upon us geeks daily and you refuse to contribute BECAUSE A STORY WAS REPEATED? GOD FORBID! Burn them at the stake! They have wasted your precious half of a second! Seriously folks, cry me a river.

    1. Re:Babies by Anonymous Coward · · Score: 0

      Somebody needs something to wine about :D

    2. Re:Babies by Anonymous Coward · · Score: 0

      They have wasted your precious half of a second!

      Hey, now that the Earth's running on time, that's an extra half-second I don't have anymore!

    3. Re:Babies by Anonymous Coward · · Score: 0

      Spare me please. You all are the biggest bunch of need-something-to-whine-about babies I have seen in a good long time. So what if something was double posted? It takes half a second to scan the headline and realize that its a repeat. You take more time crawling all over each other to be the first to whine/complain/joke about the repeated story. For God sakes, ignore the post if your time is so precious! "HELLO? What is the problem? I doubt I'll donate to Slashdot again!" That is the saddest sentence I have ever had the misfortune of reading. Slashdot pours all kinds of blessings upon us geeks daily and you refuse to contribute BECAUSE A STORY WAS REPEATED? GOD FORBID! Burn them at the stake! They have wasted your precious half of a second! Seriously folks, cry me a river.

      Wow. Took all kinds of time and energy out of your life to post that, eh?

    4. Re:Babies by Molina+the+Bofh · · Score: 2, Interesting

      > It takes half a second to scan the headline and realize that its a repeat

      Did you notice this is the same kind of logic some spammers use when they try to convince others that spamming is harmless ? Something along the line of "It just takes a second to read, and if you don't like, just ignore it.".

      --

      -
      Roses are #FF0000, Violets are #0000FF, find / -name '*base*' |xargs chown -R us && mv zig greatjustice
    5. Re:Babies by Red+Pointy+Tail · · Score: 1


      Yeah but think of how many seconds of how many million geeks, wasted, i tell you WASTED! If any of the editors have the foresight to spend say 60 seconds checking, then the precious seconds of all the poor geeks in Asia and Africa will not be
      lost, and to add ruthless insult to grieveous injury, even the cruel Earth has sought to deprived them of it since 1998. And I might add that if this continues, the terrorists would have already won. Spare a thought for the children.

    6. Re:Babies by Anonymous Coward · · Score: 0

      But do you get 200 dupes a day mixed in with important business e-mail?

    7. Re:Babies by Molina+the+Bofh · · Score: 1

      I never said that dupes were as bad as spam. But that the reasoning used was similar to the one of spammers.

      Anyway, it's annoying.

      --

      -
      Roses are #FF0000, Violets are #0000FF, find / -name '*base*' |xargs chown -R us && mv zig greatjustice
    8. Re:Babies by Anonymous Coward · · Score: 0

      Reading your comment wasted a few seconds of my time also.

    9. Re:Babies by xchino · · Score: 1

      The only thing that annoys me more than the whiners you speak of are the whiners who wine about people whining, which you are doing. Why don't you just shut the hell up and let people whine? Do you think you are imparting the community with some precious nugget of golden knowledge here? Take you own advice, and "For God sakes, ignore the post if your time is so precious!"

      See, I could have just ignored you're post, but I chose to whine about it instead. It's quite a vicious circle you're a part of here.

      --
      Everyone is entitled to their own opinion. It's just that yours is stupid.
    10. Re:Babies by Anonymous Coward · · Score: 0

      Slashdot pours all kinds of blessings upon us geeks daily

      Finally, the +5 Funny makes sense to me.

    11. Re:Babies by Anonymous Coward · · Score: 0

      err, you really are quite emotional aren`t you?

  43. sun has changed? by metalmario · · Score: 1

    i'm bad with physics, but i guess the sun's mass isn't constant over time, which can cause such effects that the planet earth's orbit will change. or have the other planets in our solar system changed somehow? or something like this. anyone smarter try to explain this?

    1. Re:sun has changed? by Anonymous Coward · · Score: 2, Informative

      > i'm bad with physics, but i guess the sun's mass
      > isn't constant over time, ... anyone smarter
      > try to explain this?

      I am a PhD student in mathematical physics, but I'm afraid I don't have a complete answer for you.

      Technically the Sun's mass is decreasing due to solar wind, neutrinos and light (light doesn't have rest mass, but it still carries away energy). However, the change caused by this is so minuscule you can neglect it for the purpose of Earth's orbit. The difference will not be measurable.

      A change in the mass of the Earth-moon system should not have an measurable effect on the period of the orbit either (as long as it remains small compared to that of the Sun).

      General Relativity predicts a decrease in the orbital period, but it's so tiny that the only planet for which this is even measurable is Mercury (because its so close to the Sun). So I assure you that this is not it either.

      In conclusion, I don't know why Earth's year had been decreasing, anymore than those scientists know why it stopped. This is not something that is predicted by any theory that I am familiar with.

      I have a friend who specializes in solar system dynamics. Maybe I'll ask her if she has heard about this.

      Cheers.

    2. Re:sun has changed? by Anonymous Coward · · Score: 1, Interesting

      Not going to suggest I'm an expert, I am a 4th year physics student however.

      Just using basic physics(I'm not going to try to solve the n body problem in GR) we have Newton's Law of gravity:

      F = G m1Xm2/r^2, the famous inverse square law.
      Now we know that the sun has been burning for about 4 billon years, and probably has about that left, but lets say that the sun dies tommorrow, so the sun lasts about 4 billion years.

      Lets make a further assumption that all of the mass of the sun is consumed in that time, either by radiation, or by mass blasted of the surface, but at a constant rate(should be a fair assumption in this case as no radical sun behaviour seems to have happened in the last 1 billion years or so, sense were here to talk about it).

      Okay, so in a year we have about 31.5M sec. So the one second correction is 1/31.5M of a year. The mass change(and the force is linearly dependant on the mass remember) is 1/4B ie:
      3.17e-8 vs 2.5e-10.

      But hold on, a force is an acceleration right. So its cumulative over time. Lets make a further assumption that the earth is in a circular orbit. The reduction of the gravitational force due to the loss in mass is going to make the earths orbit larger. The velocity of the earth around its tranjectory will remain constant(the gravity force is tangential to the direction of motion). Lets calculate the change in the orbit radius:
      for circular motion:
      F = Gm1m2/r^2 = m2v^2/r -- centripetal force equation, force from gravity
      r = m2v^2/F

      plugging in F = 1 and F = 0.99999999975 gives
      delta r ~= 0.000000001
      time in year is portional to perimeter
      2pi(r) verses 2pi(1.000000001r) ie correction on the order of a hundredth of a second a year. And keep in mind that the sun doesn't lose all of its mass in 4 billion years so this is a great exageration.

      So, nope mass loss of the sun isn't our solution.

      There may be reasons to do with general relativistic corrections to the problem that I don't understand, but I don't see how the earth's core can play a factor either.

      The earth and moon are 'almost' (except for there gravitational effects on nearby guys like the sun) a closed system. The center of mass of the system has to stay the same. So you can replace the whole thing with a point with the mass of the earth and moon combined at the center of mass and nothing should be changed. Say the whole core shrunk to the size of a pea and glued itself to the underside of China. Well some force would have to have moved it from on average the center of the earth to the surface. That force would have to have come from either the earth or the moon. But 'for every action there's an equal and opposite reaction' right? The forcing object would get pushed back and our center of mass point would stay the same.

      We've taken a radical case with the sun radiating away its mass and got a negligible effect, I really don't see how a tidal like situation with the sun and moon/earth combination could make that much of a difference. After all, similar research has shown that the earth's tides are getting less severe because the moon apparently is getting farther away from the earth. So tidal effects have to fall of with distance pretty quickly. They'd have to fall off at least as fast as the basic gravitational force creating them ie 1/r^2.

      But as I said, I'm an undergrad in physics, not a professor in planetary dynamics. Hope the excercise in physics was as much fun for you guys as it was for me. It's been at least a year since I last used Newton's law of gravitation and I'm in physics ;)

    3. Re:sun has changed? by Tony+Hoyle · · Score: 1

      The sun also loses mas due to solar flares, and apparently gains mass due to space debris hitting it (I saw this on TV today :)

      Plus of course the sun us a huge fusion reaction which is burning fuel and giving off energy.. which must have some effect.

      I'm not sure how much effect that would have on the orbit though.

    4. Re:sun has changed? by Anonymous Coward · · Score: 0
      Okay, this is probably a retarded question, but googling has gotten me nowhere. Leap seconds are a result of lunar tidal forces slowing down the earth's axial rotation as the moon spirals away from us. Great. Simply put, if this is a continuous effect, why didn't the earth have a "0 second day" in the recent (geologically speaking) past?

      To illustrate, let us assume that we:

      1. hold that the leap second effect constant throughout the past (it should actually have greater effect the closer the moon is, so this is reasonable).
      2. normalize the leap second to occur only once every 100 years (far less frequently than we have observed).
      Fine. Now, 24 hours/day * 60 minutes/hour * 60 seconds/minute = 86400 seconds per day. Assuming only 1 leap second every 100 years, 8.64 million years ago there would be a zero second day.

      This analysis does not work, since obviously the effect would be better modeled by a non-linear system (PDE, perhaps?); however, the effect remains: if leap seconds occur with such frequency and the moon "spiraling outward" is monotonic, then the length of a day in very recent history would be incredibly short.

      I am obviously retarded, so I post AC. Someone please explain this, derision optional.

    5. Re:sun has changed? by aminorex · · Score: 1

      > I am a PhD student in mathematical physics

      Is there another kind of physics? A kind
      that doesn't use all that pesky math?

      --
      -I like my women like I like my tea: green-
  44. Fatness by Anonymous Coward · · Score: 0

    It is true that people have been getting fatter. Blame McDoanlds for slowing down the Earth's spin. Class action lawsuit

  45. AOL CDs by T-Ranger · · Score: 2, Funny
    AOL must have some way of directly converting energy into matter, specificly CDs ala Star Treks replicators. The proof being that if they arn't the entire earths resources would have been consumed 2 or 3 times over in their production via conventional means.

    And all that energy to matter conversion has increased the mass of the Earth. Which has increased its gravatational field, and the effects of everything elses field on it. Thus the earth is moving faster.



    Or possibly space dust.

  46. not today, how about next June? by at10u8 · · Score: 1

    To be sure, this is merely that there was no leap second yesterday. Slashdot has previously seen another story about the possibility that leap seconds might be discontinued permanently. Within the confines of that are links to everything that you could ever want to know about leap seconds, earth rotation, history of internecine wars between astronomers and physicists about time, etc.

  47. I blame Linux by dead+scientist · · Score: 1

    If you shift mass from the mid latitutes to penguin country, the earth speeds up. Software = orderliness = Gibbs Free Energy = a tiny bit of mass. So the only way we can get leap seconds back is for Windows not only to bloat, but to give value for bloat. Otherwise, we may have to have a negative leap second. Is there a word for this? Say, a pael second.

  48. r3d0052, r3y0023, r3cYcl3 by Deraj+DeZine · · Score: 1

    If I cut and paste all of the insightful, interesting, etc. comments from the previous dupe, will I get free karma?

    --
    True story.
  49. Earth rotation about its axis or about the sun? by motyl · · Score: 1

    The CNN article suggests that the speed of rotation around the sun behaves "strange".

    most scientists agree the Earth's orbit around the sun has been gradually slowing for millennia.

    But IMHO what can be changed by tidal, climatic geophysical effects is the speed of the rotatation about its own axis (leap seconds are introduced to correct the duration of the day, not the year).

    Unfortunately CNN did not provide any way to comment/correct their article.

  50. Re:OT: Bits and bytes by aurum42 · · Score: 1

    "It all depends" - a bit is the only constant here across platforms - a binary digit that can hold one of two possible values. There have been machines with 9-bit bytes (DEC PDPs), 16-bit words, 36-bit words and so on. Some obscure languages have been devised around base 3 representation ("trits"?) and people experimented with trinary logic in the early days of computing.

    --
    "The slave who knows his master's will and does not get ready...will be be beaten with many blows."Luke 12:47-48
  51. Rotational Kinetic Energy II by Michael.Forman · · Score: 4, Interesting


    If the Earth is assumed to be a homogeneous sphere and the rotational axis is assumed to be the straight line passing through the north and south geographic poles, the moment of inertia of the Earth is I = MR^2 where M is the total mass of the Earth and R is its radius. The kinetic energy of a rotating Earth is given by K = 1/2 I w^2, where w is the angular velocity.

    The energy associated with an angular velocity which is increased by 1 second over a year is equivalent to an extra 1.6e22 Joules of energy or 40 times the annual energy consumption of mankind (DoE 1999). A detailed analysis and matlab script are available here

    Yeah, this is a rereply. Whatever. It's a holiday. Nothing else to reply to. :)

    Michael.

    --
    Linux : Mac :: VW : Mercedes
    1. Re:Rotational Kinetic Energy II by arth1 · · Score: 2, Insightful
      If the Earth is assumed to be a homogeneous sphere and the rotational axis is assumed to be the straight line passing through the north and south geographic poles, the moment of inertia of the Earth is I = MR^2 where M is the total mass of the Earth and R is its radius. The kinetic energy of a rotating Earth is given by K = 1/2 I w^2, where w is the angular velocity.

      With global warming, won't the radius increase, affecting this calculation?

      Regards,
      --
      *Art
    2. Re:Rotational Kinetic Energy II by Anonymous Coward · · Score: 0

      With global warming, won't the radius increase, affecting this calculation?

      No, it won't. Increasing the temperature of the Earth doesn't change its radius.

    3. Re:Rotational Kinetic Energy II by Jeff+DeMaagd · · Score: 1

      What, when the radius of the earth increases by a few meters, mostly just because water expands? The rock isn't going to expand much in comparison.

    4. Re:Rotational Kinetic Energy II by Anonymous Coward · · Score: 0

      ... homogeneous ... nope.

      ... sphere ... nope.

      :) Of course that isn't too applicable to your statements ... except for the fact that the reason for the slowdown in past years is because the earth isn't homogeneous.

    5. Re:Rotational Kinetic Energy II by Anonymous Coward · · Score: 0

      That is assuming of course that "global warming" is based on solid science, which it is not.

    6. Re:Rotational Kinetic Energy II by Michael.Forman · · Score: 1


      I know that the Earth is an inhomogenous oblate spheroid with a fluidic mantle, however closed-form algebraic equations to estimate the rotational kinetic energy of such a structure do not exist. Thus, I used an approximation (note the "if A is assumed to be B" clause).

      Although it is just an approximation, it nonetheless provides the order-of-magnitude energy that is either stored in the Earth's mantle or transfered to the Earth-Moon system. I just thought this would be understood.

      Michael.

      --
      Linux : Mac :: VW : Mercedes
    7. Re:Rotational Kinetic Energy II by Anonymous Coward · · Score: 0

      Actually, it does. But not very much. Rock doesn't expand much when it gets warmer, and it's not getting very much warmer, really (a few degrees).

      However, the radius of the earth's atmosphere probably increases a bit more than that... (Boyle's law applies here... PV=nRT, so total volume of the atmosphere is proportional to its temperature, in degrees Kelvin)

    8. Re:Rotational Kinetic Energy II by Fissure_FS2 · · Score: 1

      Sorry to rain on your parade, but for a sphere the equation is I = (2/5)MR^2. Now if all the Earth's mass was concentrated in a ring at the equator, then you'd be right.

      --
      My life's goal is to get a score of +3!
    9. Re:Rotational Kinetic Energy II by arth1 · · Score: 1
      What, when the radius of the earth increases by a few meters, mostly just because water expands? The rock isn't going to expand much in comparison.

      The increase in the radius of the atmosphere is proportional to the increase in absolute temperature. At 0K, there's no atmosphere at all. I wouldn't be surprised if a few degrees C overall temperature increase would have a measurable effect on the radius of the planet.

      Regards,
      --
      *Art
    10. Re:Rotational Kinetic Energy II by chinigo · · Score: 1

      True, the radius will increase because of The Law of Charles and Gay Lussac (not Boyle's law as in another reply). And the moment of inertia would increase, if you assume that the entire atmosphere moves along with the solid Earth. If the atmosphere stays still relative to the rotation of the Earth, than an increase in its radius won't affect the moment of inertia, because it isn't rotating.

      So of key importance is how still the atmosphere stays. Does it move primarily with the rotating Earth beneath it, or does the Earth rotate in a relatively still atmosphere? I know it experiences the Coriolis effect, and so moves differently than the ground beneath it, but which behavior prevails: the drag due to the Coriolis effect, or the drag due to the ground beneath it?

    11. Re:Rotational Kinetic Energy II by Michael.Forman · · Score: 1


      Oops. I have the correct constant in my matlab script and supporting analysis but dropeed it when I wrote my slashdot post.

      The kinetic energy and ratio in the post are correct.

      I'm always in such a hurry to make my slashdot post, in order to try score a better mod. *sigh*

      Thanks,
      Michael.

      --
      Linux : Mac :: VW : Mercedes
    12. Re:Rotational Kinetic Energy II by mike3411 · · Score: 1

      but i think that clearly limits the applicability of such equations in this area. i liked your original post but the amount of approximation is such to prevent its use here.

      --
      Mod me down, and I will become more powerful than you can possibly imagine!
    13. Re:Rotational Kinetic Energy II by man_ls · · Score: 1

      if I had mod points I'd mod you up both places, cuz it was a good comment, despite the typo. glad to see some interesting work like that.

    14. Re:Rotational Kinetic Energy II by Michael.Forman · · Score: 1


      I disagree totally. A first-order approximation is a first-order approximation. Additionally, there really is no other way to come up with an off-the-cuff, order-of-magnitude estimate of rotational kinetic energy. Aside from writing a finite element code to simulate the fluidic mantle, you're stuck with an algebraic or calculus-based approximation.

      Further, it seems nonsensical to state that the "approximation is such to prevent its use here", when there exists no other easily accessible approximation and "here" refers to slashdot where the required accuracy is zero.

      If I were paid to solve this problem, I would next bound the minimum and maximum total rotational kinetic energy assuming ideal flows with and against the rotation of the crust to bound the solution (leaving algebra behind for simple calculus). I fully expect that the first-order approximation would lie between those bounds.

      IMichael.

      --
      Linux : Mac :: VW : Mercedes
  52. Re:40l cd5 by Deraj+DeZine · · Score: 2, Interesting

    But haven't you seen their new advertising campaign? They've reformed! Everyone likes AOL now, even Snoop Dogg!

    I personally expected them to give up on their CDs a while ago, but there's no accounting for marketing...

    --
    True story.
  53. What.... by hypermike · · Score: 0

    If a slashdot post is duped within the leap second does the world implode?

    --
  54. haha you done shit your self in public by Anonymous Coward · · Score: 0

    haha crying bitch

  55. from the only-a-matter-of-time dept. by Anonymous Coward · · Score: 0

    So true Cmdr.

  56. Re:Babies make grown-up Jesus lie. by teamhasnoi · · Score: 1
    If it only takes half a second, why don't they do it? On the most dupes day I've ever seen (3 - of stories still on the front page!), that would have taken, um, yeah, hmmmm. I'll let someone else do the math.

    Why people complain about it is beyond me. Duplication of effort is a tradition in the open source world! Plus, I've already wasted more than 30 earth-orbit-leap-seconds posting this.

  57. Re:Taco's got alzheimers! by Anonymous Coward · · Score: 0

    You think anybody really gives a fuck about all the dead sandniggers? GNAA sucks balls, too. Didn't you see how bad their bitch asses got whipped in the FP challenge on Monday? TK fucked them in their gay nigger asses.

  58. Posts by greygent · · Score: 4, Funny

    Update yeah, this is a repost. Whatever- it's a holiday. Nothing else to post

    Sure there is. You could post about how the Stardust probe is about to enter a comet's tail, or perhaps India's plans for a hypersonic plane, or even the chnaging face of offshore programming...

    1. Re:Posts by DrVxD · · Score: 1

      Or how blasted everyone got last night...

      --
      Not everything that can be measured matters; Not everything that matters can be measured.
  59. Q: Rounding effect? by ScrappyLaptop · · Score: 1

    Off-the-cuff curiosity question and yes, at risk of appearing ignorant, but what better way to start out the new year? Is it possible that for 28 years we added a second even though only, say, .93 second was needed and now, for five years, no full second is needed? A second is a pretty big full unit of time for the calculation to always come out even.

  60. Very wierd by Anonymous Coward · · Score: 0

    From the article: "Possible explanations include the tides, weather and changes in the Earth's core, he said."

    IANA physics expert, but all these things happen within the earth which is a closed system. Why the hell would they have an impact on the speed of rotation of the earth around the Sun?

  61. Call Agent Smith! by I+don't+want+to+spen · · Score: 2, Funny

    Someone's overclocking the Matrix!

    --
    Don't go to a brothel if you want to buy broth
  62. I AGREE!!! by mrscott · · Score: 1

    This ranks right up there with the folks that were supposed to prevent 9/11 and with doctors that let people die just because they have injuries too serious to fix! Dupes on Slashdot SHOULD ruin everyone's day - neigh - LIFE!!! Editors on Slashdot that allow dupes on a holiday should be shot, burned, and their ashes scattered over the local sewage treatment plant. This is seriously a serious situation. A free (unless you're a subscriber) service that posts a duplicate story. I think we should outright boycott this damn site until they get things right! Or, we could maybe - just maybe - calm the hell down a little. Do YOU sit in front of your email client 24/7? If you do, get a life, but I bet some of you sleep sometimes, eat other times and MAYBE even go out with friends once in a while - especially around the holidays. I see this kind of hyper-reactivity a lot on Slashdot. I'd be willing to bet a whole lot of money that each and every one of you has made a mistake at some point in your lives. If not, you're either still in college (where you are never, ever wrong and only other people mess things up) or you get paid a whole shitload of money since you're perfect. Why is this such a big deal, anyway? Skip it and move on...

  63. Re:OT: Bits and bytes by k4_pacific · · Score: 1

    "Announcing new Nabisco Trits (TM)"

    Also try the Cheese Trits and Cool Ranch Trits

    --
    Unknown host pong.
  64. Less mass by MrLint · · Score: 2, Funny

    Well the earth is on time due to the massively successful launching into space of all the world's boy bands and all that casts of all the reality shows.

    I mean NASA did actually get that done right?

  65. Silly k4_pacific by Stradenko · · Score: 1

    Trits are for kids!

  66. Well, Google News Caught It by Anonymous Coward · · Score: 0

    http://news.google.com/url?ntc=04SD0&q=http://scie nce.slashdot.org/science/04/01/01/202208.shtml%3Ft id%3D134

  67. Earth is speeding up by Anonymous Coward · · Score: 0

    A few things can cause this, but the most likely is that we're about to crash into the sun. There have been fluctuations in the molten iron core, possibly signaling a magnetic pole reversal. There have been some unprecedented major solar storms recently. The number of reality and confrontational talk shows on television is now greater than all other programming combined. This is surely a signal of the Apocalypse.

  68. M0-theory by xmedh02 · · Score: 1

    I have searched for it on google and it has nothing to do with ADD..?

    1. Re:M0-theory by Anonymous Coward · · Score: 0

      The very last one brought me to this site, which DOES have something to do with ADD. Very interesting. http://www.reciprocality.org/

  69. Earth speeds up: anti-leap second! by ljavelin · · Score: 4, Insightful

    CNN Says:

    For 28 years, scientists repeated the procedure [of adding a leap second]. But in 1999, they discovered the Earth was no longer lagging behind.

    Um, not exactly true. Not every year over the last 28 years has had a leap second. For example, 1984, 1986 and 1987 didn't have a leap second. It's generally determined if a leap second is necessary about 6 months ahead of time by IERS. However, this is the first 5 year gap of no leap seconds.

    It's interesting to note that the "leap second protocol" permits a "reverse" leap second - meaning a "short" minute. This is because the folks involved in defining the leap second realized that the rotation of the earth is not 100% predictable, and therefore they theorized that there could be a "fast spinning year" that would merit the loss of a second. This hasn't happened yet.

    This whole rotation-of-earth-isn't-constant idea is pretty new (50 years). So just because we have a 5 year period of smaller rotaional speed deltas isn't totally unexpected.

    1. Re:Earth speeds up: anti-leap second! by pipingguy · · Score: 1

      ...the "leap second protocol" permits a "reverse" leap second...

      Maybe this means that we could undo the release of the latest William Shatner album.

    2. Re:Earth speeds up: anti-leap second! by Anonymous Coward · · Score: 0

      This hasn't happened yet.

      Does the fact that no 'reverse' leap second has been necessary mean that during the benchmark year (1978) the Earth was spinning exceptionally fast?
      What a coincidence.

  70. Redundant -1 by PrintError · · Score: 1

    How many idiots are going to say "repost!"

    Honestly, you guys are about as creative as a metronome.

  71. Which one is "wrong"? by syates21 · · Score: 1

    No great science expertise here, but the article mentions that they have to deal with discrepancies between the atomic clock and the earths orbit around the sun by using leap seconds.

    Out of curiousity, how do they know for sure that the atomic clock doesn't change over time, as opposed to the earth's orbit? Isn't it possible for the cesium decay (or whatever it is they use) to fluctuate a little bit?

    1. Re:Which one is "wrong"? by Detritus · · Score: 1
      The cesium atomic clocks use a fundamental property of the cesium atom, the difference in energy between two states of the cesium atom. This is the same principle of physics that produces emission lines in a spectrogram when an element is heated. When an electron jumps from one state to another, it emits or absorbs a photon at a specific and fixed frequency. The atomic clock measures this frequency and uses it to keep an oscillator synchronized with the cesium atoms.

      If you accept that every cesium atom is identical, no matter where you are in the universe, or whether the atoms are 1 year old or 1 trillion years old, then the properties of the atoms are also constant and identical. They don't slow down with age or wear out.

      --
      Mea navis aericumbens anguillis abundat
    2. Re:Which one is "wrong"? by syates21 · · Score: 1

      Cool. Thanks for the explanation.

  72. The "smith" article. by Tim · · Score: 2, Funny

    Actually, not only is the article a dupe, but I just saw the old article linked on google news!

    My new year's prediction: this article, having found a niche, will be continually resubmitted by clueless slashdot readers, reposted, and picked up by automated news services in a never-ending cycle of google-reader-slashdot that will ultimately threaten the very fabric of the internet itself!!

    Hey. It's as plausible of any other prediction I've read today...

    --
    Let's try not to let fact interfere with our speculation here, OK?
    1. Re:The "smith" article. by geekoid · · Score: 1

      ".. threaten the very fabric of the internet itself!!"

      What is the very fabric of the internet? I'm thinking mostly polyester, maybe a cotton polyester blend. Perhaps 90/10.

      mmm this beer is good...hey, did I hit submit? no, damn...mm this beer is good..

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  73. How do we know.... by HangingChad · · Score: 1

    ...that we're fast? How do we know the rest of the universe isn't slowing down?

    --
    That's our life, the big wheel of shit. - The Fat Man, Blue Tango Salvage
    1. Re:How do we know.... by ByteSlicer · · Score: 1

      According to General Relativity, both these viewpoints are valid.
      But since you asked this, you probably knew already...

  74. The Answer by Anonymous Coward · · Score: 0

    Just maybe, the rest of the universe has moved? It's not wallpaper, you know...

  75. Babies by MichaelGCD · · Score: 1

    Spare me please. You all are the biggest bunch of need-something-to-whine-about babies I have seen in a good long time. So what if something was double posted? It takes half a second to scan the headline and realize that its a repeat. You take more time crawling all over each other to be the first to whine/complain/joke about the repeated story. For God sakes, ignore the post if your time is so precious! "HELLO? What is the problem? I doubt I'll donate to Slashdot again!" That is the saddest sentence I have ever had the misfortune of reading. Slashdot pours all kinds of blessings upon us geeks daily and you refuse to contribute BECAUSE A STORY WAS REPEATED? GOD FORBID! Burn them at the stake! They have wasted your precious half of a second! Seriously folks, cry me a river.

    --
    hate titty pee colon slash slash
  76. Oh god. I wonder if... by RyuuzakiTetsuya · · Score: 0, Offtopic

    Nancy Lieder is going to have a field day with this?

    --
    Non impediti ratione cogitationus.
  77. interesting by alex_ant · · Score: 0, Troll

    I was on a committe at NIST that analyzed this issue. Basically leap seconds are compensatory measures taken by government (mainly scientists) to keep time running the way it does. The system of hours/minutes/seconds we have set up is quite arbitrary and so this doesn't really affect it critically, but even a fraction of a second can impact our lives in the strangest of ways. (Our biological clocks, bird migration patterns...) NIST wields quite a bit of power, if you think about it.

    1. Re:interesting by Jugalator · · Score: 1

      I seriously doubt my biological clock or bird migration would be affected by an extra millisecond or so... I can't think of how that would be possible. Sounds like the change would be slow enough for us to adapt without many problems. Also, aren't bird migrations more triggered by seasonal changes than exact times? What I'm saying is: if a season gets 0.05 second longer per year, a season would not end 0.05 seconds later than before, but whenever that season would end due to climate changes. These usually vary with at least a week (or 604,800 seconds), back and forth from year to year. This is completely normal and birds has no problems whatsoever to adapt to these changes annually. For example, this year the snow and real cold we associate with winter came to us probably two - three weeks later than in 2002. It's not like a bird flying from place A to B need to perfectly match a certain time when the climate switch, or else they're doomed.

      If the year gets a fraction of a second longer per year, that should still just add up to a second in a century or so... Nothing compared to what the birds have to put up with today due to climate variations. They only work with averages and tries to adapt the best they can.

      --
      Beware: In C++, your friends can see your privates!
  78. Don't bother suggesting improvements by Overly+Critical+Guy · · Score: 3, Insightful

    Every time you bother to suggest something to CmdrTaco, he'll either never reply or respond with a really nasty, sarcastic e-mail.

    Taco really abhors change that isn't his. Especially if it's something that's already implemented elsewhere (i.e., Kuro5hin), they'll claim it "doesn't scale well."

    Slashdot is behind the times. Its userbase has become a joke of groupthink and trolls, and the editors don't even read their links or posted stories anymore. It still has the momentum of a large fanbase, however, which just increases the stupidity because we have all these mistakes happening in front of a huge readership.

    --
    "Sufferin' succotash."
    1. Re:Don't bother suggesting improvements by Anonymous Coward · · Score: 0

      Then please go away.

    2. Re:Don't bother suggesting improvements by Anonymous Coward · · Score: 0

      Thereis evidence to prove that Overly Critical Guy is a lying cocksucker. Think independently.

    3. Re:Don't bother suggesting improvements by pipingguy · · Score: 1


      Somehow, use of the word, "cocksuckers" in a sig leads me to discredit the original text of the author.

    4. Re:Don't bother suggesting improvements by Anonymous Coward · · Score: 0

      Then you would be pretentious and superficial. "Original text of the author?" It's just a webpost, dude.

    5. Re:Don't bother suggesting improvements by fruey · · Score: 1
      I have agreed to differ with CmdrTaco before, in retrospect he has firm beliefs and sticks to them, all power to him.

      Now, there are some things that could be improved on SlashDot, and we all know that. But basically it's still the most popular and the userbase is too diverse for anyone to really do much. First thing I would change is the moderation choices. Other than Interesting or Insightful there is no other reasonable option. Scaling is a problem though, they already have to handle huge load on their servers and I expect that changing code isn't easy... anything that will introduce extra load is going to cause problems for sure!

      --
      Conversion Rate Optimisation French / English consultant
  79. Rotational? Not important! by AndroidCat · · Score: 1
    Apparently the most important science discovery on 2003 was Fark energy. (Follow the link in my sig before they fix the typo.)

    I'm not following the parent post, but it is a dead news day.

    --
    One line blog. I hear that they're called Twitters now.
  80. Everything in this thread... by lisany · · Score: 1

    should be modded as redundant.

  81. And the confusion continues... by Jugalator · · Score: 2, Insightful

    To make the world's official time agree with where the Earth actually is in space, scientists in 1972 started adding an extra "leap second" on the last day of the year.

    "Where earth actually is in space"?

    As HopeOS said when the previous article was posted:

    "Leap seconds, as pointed out, are an entirely different beast, and are meant to shore up the discrepency between our actual rotation and the atomic clocks we use."

    That's why. This has nothing to do with rotations around our sun, just around our own axis.

    At the National Institute for Science and Technology in Boulder, spokesman Fred McGehan said most scientists agree the Earth's orbit around the sun has been gradually slowing for millennia.

    Assuming this is true and this is the actual news here, the reporter (and the writer of the other article) shouldn't have started talking about leap seconds in the first place since these aren't added to compensate for that.

    --
    Beware: In C++, your friends can see your privates!
    1. Re:And the confusion continues... by kalidasa · · Score: 1

      The earth does not rotate around the sun. The earth REVOLVES around the sun.

  82. The article suggests that it does... by Eric+Damron · · Score: 1

    "At the National Institute for Science and Technology in Boulder, spokesman Fred McGehan said most scientists agree the Earth's orbit around the sun has been gradually slowing for millennia. But he said they don't have a good explanation for why it's suddenly on schedule."

    "Orbit around the sun" doesn't sound like they are talking about rotation to me.

    --
    The race isn't always to the swift... but that's the way to bet!
  83. Chill dude. by Atragon · · Score: 1

    What it says in the subject.

  84. Physics says it's possible. by Vandil+X · · Score: 1

    Perhaps. In terms of Physics, every time a spacecraft/probe uses a planet to get a gravity-assist (to conserve fuel, etc), the planet's rotation slows by some amount. Like 1 foot per 1 trillion years.

    So maybe all our Earth-based gravity assists for all the probes, shuttles, and satellites have collectively slowed the Earth down enough to = 1 second?

    --
    Up, Up, Down, Down, Left, Right, Left, Right, B, A, START
    1. Re:Physics says it's possible. by Yartrebo · · Score: 1

      No, a gravity assist doesn't affect the rotation speed one bit. It only affects the orbital speed (and thus the length of a year).

      An outward assist (when the spacecraft is sped up) causes the year to get shorter, and an inward assist (when the spacecraft is slowed down) causes the year to get longer.

  85. Missing time=UFOs by photomic · · Score: 1

    Obviously, the population of the planet was a victim of alien abduction during this "mising second."

  86. Re:OT: Bits and bytes by SmilingBoy · · Score: 1

    tits?

  87. the blame game by bradwww · · Score: 1

    blame the terrorists! ghastly move changing the royation of the earth on it's axis - clever foes be they.

  88. Space Debris by Sammich · · Score: 1

    It is all the space debris we've dropped off in space. They made use lighter and now we're spinning right on track :)

  89. Heh by devphil · · Score: 1


    Most of the dupes are Taco's. For him to take your suggestions would require Taco to actually read his own website... which he's never shown any evidence of doing.

    --
    You cannot apply a technological solution to a sociological problem. (Edwards' Law)
  90. As noone got it right in the earlier article by fw3 · · Score: 4, Informative
    In addition to the fact that tides and the moon influence earth's rotation, so does weather.

    Particularly, the monsoon season I believe has the largest effect, particularly because the generated winds impact the himalayan mountains.

    The combination of a large (albeit distributed) force impacting a large object (himalayas) affects the angular velocity of the earth.

    I learned this first because a friend was writing an ephermeris program and got in contact with the guy an NIST who tracks these things. I beleive they can make some predictions of change in rotational velocity based on the force of observed storms.

    Also the Navy has built an array of (radio or laser, I forget) interferrometers located in (I believe) the rocky mountains which are used to measure the actual variances against star positions.

    --
    Linux is Linux, if One need clarify their dist: <Dist>/GNU Linux
    bsds are of course just BSD
  91. And this reply by blair1q · · Score: 1

    Is a re-reply.

    Yeah. It's the new-year.

    Nothing new to reply.

  92. As bad as being born on 30th Feb 1712 by pflodo · · Score: 4, Interesting

    When (greater) Sweden was going to change from Julian to Gregorian calendar they stuffed it up, got one day out of sync with all Julian countries, so to get back in sync they added an extra leap day, creating the only 30th Feb in history.

    They eventually made the change from Julian in 1753 by having (gregorian) 1st Mar 1753 after (julian) 17 Feb 1753 removing ten days.

    Makes a leap second seem a bit insignificant....

    If you have no idea about Julian (as in Ceasar) and Gregorian (as in pope) calendars, have a look here

  93. You're a joke by Anonymous Coward · · Score: 0

    And you're one of those trolls. How the hell this got modded as insightful instead of offtopic (as it is) is something only the crack smoking moderators can answer.

  94. Re:As no one got it right in the earlier article by aimew · · Score: 1

    Isn't there some pesky law about action/reaction? Isn't the Earth a closed system? How then can an Earthly force affect the Earth? Isn't that a little like picking yourself up by your bootstraps?

    Just because there are people studying some 'self proclaimed' phenomenon doesn't mean that the phenomenon exists. Ever hear of "Publish or Perish" and government grants? That's what makes the impossible merely costly.

    Happy New Year

    --
    Keeper of the terrible karma ---
  95. bullshit. by Anonymous Coward · · Score: 0

    find me one single creditable published article refuting the science behind global warming. there is a massive, massive consensus in the scientific community about this, only tin foil hat slashdot trolls like you are blind to this.

  96. Good one Taco by Anonymous Coward · · Score: 0

    Yeah, whatever. What a moron.

  97. Maybe it's due to the ... by bs_02_06_02 · · Score: 1

    magnetic pole flipping around?

    --
    -- No sig for you!
  98. The CNN article is confusing by craXORjack · · Score: 1
    The title says the Earth is changing its spin, but then the text says what is changing is the Earth's orbit around the Sun. So which is it?

    Possible explanations include the tides, weather and changes in the Earth's core, he said.

    I can see how these things could affect the spin around the Earths axis. For example, melting glaciers would tend to speed up the spin because of the mass getting closer to the Earth's center like a skater pulling her arms in. But how can they affect the rotation around the Sun?

    --
    Liberals call everyone Nazis yet they are the closest thing to it.
  99. Re:As no one got it right in the earlier article by bobv-pillars-net · · Score: 1

    Yes, you can change rotational velocity in a closed system:

    1. Stand on ice or some similarly low-friction surface
    2. Point your left arm straight forward and your right arm straight back.
    3. Swing both arms through a horizontal plane so that your left arm points behind and your right arm points ahead.
    4. Swing both arms through a vertical plane so that the left arm points forward and the right arm back, again

    Repeat as needed to accelerate rotational velocity. The effect is more pronounced if done while holding small barbells, and it even works for astronauts in free-fall.

    --
    The Web is like Usenet, but
    the elephants are untrained.
  100. Re:As no one got it right in the earlier article by fw3 · · Score: 1
    Happy ny to you also!

    Well it's called bootstrapping for a reason ;-) And yes this amounts to someone's job but its more useful (necessary) than your post suggests.

    Anyhow no, this is not bogus, here roughly was my friend's conversation with the guy at NIST:

    Engineer How do you calculate spatial position (exactly)?
    NIST Obviously first we know precession and nutation, these are easily predictable.
    Engineer So that's exact, the whole story?
    NIST No, there are some additional varriations.
    Engineer What are those?
    NIST That's my job
    I don't know what was discussed about tides etc
    ....
    discussion of effects of e.g. monsoon -> himalayas

    It shouldn't be too hard to think why this is useful. A one second error in time frame of reference can result in a .24 nautical mile (444 meter) navigational meter.

    When doing offshore navigation manually by sextant of course this might be acceptable, it's damned hard to shoot a LOP to better than a half mile accuracy anyway. However GPS obviously is intended to be accurate down to a few meters.

    Whether or not you agree that the ability to drop weapons at precise locations is important, the military certainly does consider it to be so( remember, that a conventional weapon dropped with meter-accuracy can be more effective than a far more expensive nuclear munition if dropped with say 200 meter accuracy.

    Because the variations we're discussing have matierial impact on precision navigation which is probably how they found out that some of the larger variations are generated by monsoon and other 'large' weather patterns. I find it interesting whether or not it's useful but that's how science often is: someone cares about a phenomenon, usually for a practical reason, and often the answer is not what was expected (i.e. it's science).

    And not it's probably not even a fully closed system. at some scale the solar wind must act to provide friction against the atmosphere which in turn transmits the resultant shear forces to the globe and how those forces are transmitted in turn would depend on global weather patterns.

    Personally I see value, not pork-barrel cost in tools which allow the military to fulfill it's mission with weapons involving far less collateral damage than would be otherwise possible.

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    bsds are of course just BSD
  101. Re:As no one got it right in the earlier article by aimew · · Score: 1

    Yeah, OK, I understand all that. The tides are a gravitational effect of the moon - that's outside the Earth so of course the Earth can be effected. Ditto for the solar wind.

    My skepticism was about weather, such as monsoons, having a rotational effect on the Earth. My comments, vis-a-vis government grants to effectively go snipe hunting, was to do with just that: Earth originated phenomena effecting it's rotation.

    Calculating special position is necessary and tricky as well; remember that the stars are also moving!

    It is also my understanding that leap-seconds were an artifact of atomic clocks and has been discontinued due to the disruptions they were having on the scientific community and navigation in general. The atomic clocks, you see, are more accurate than the Earth; what are we trying to measure after all?

    That's $0.02 more.

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  102. Raid 1 story? by Hoi+Polloi · · Score: 1

    I thought redundancy was a big movement in the systems biz. Maybe this story is in case the first one disappears. They are mirrored!

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    It is by the juice of the coffee bean that thoughts acquire speed, the teeth acquire stains. The stains become a warning
  103. The real reason the earth is slowing down by Hoi+Polloi · · Score: 1
    I'd say the rapid bloating of the US population is why the earth is slowing down.

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    It is by the juice of the coffee bean that thoughts acquire speed, the teeth acquire stains. The stains become a warning
  104. Re:OT: Bits and bytes by Anonymous Coward · · Score: 0

    You're confusing bytes with words. Words vary, but I don't think bytes do as much. There may have been some weirdos but most people measure words in terms of bytes, which are almost invariably octects these days. So, when you say bytes and words in the same sentence above, you're confusing people who don't already know what you're talking about. some words are 2 bytes, some words are 1 byte, but in both cases byte still means octet.

  105. Re:As no one got it right in the earlier article by SlayerofGods · · Score: 0

    The earth isn't closed, theres that pesky sun out there which causes all the weather on earth.

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    Technology, the cause of and solution to all of life's problems.
  106. Sorry but wrong again. by fw3 · · Score: 1
    Weather patterns are *observed* to be the largest (hard to predict), cause of variation in earth's position. in particular as I said, the effect of monsoons impacting the himalayas.

    I've now read a few of your other posts and seen that you have a bit of mistrust of government spending, not a bad thing in and of itself. However in this case as in many others the assumption that something is unwarranted leads to erroneous conclusions.

    I'm reminded of the US Senator who used to hand out the 'Golden Fleece' awards standing before congress waiving a swatch of Kevlar(tm) and complaining that it was not an effective armor for battleships. Great soundbite, smart politics, stupid and wrong point.

    It is also my understanding that leap-seconds were an artifact of atomic clocks and has been discontinued .... The atomic clocks, you see, are more accurate than the Earth; what are we trying to measure after all?

    We already established that, we're establishing the frame of reference with a degree of accuracy necessary to hit a target with meter-accuracy. Because CEP directly limits the effectiveness of weaponry (each time you reduce the target-delivery error by half you increase the payload effectiveness by a factor of 4). I would think that someone with military experience would grok this.

    Before even considering the political advantages of being able to use conventional weapons for tasks that used to require tactical nukes, the direct savings of lives and money is obviously paid off by the ability to use smaller payloads.

    --
    Linux is Linux, if One need clarify their dist: <Dist>/GNU Linux
    bsds are of course just BSD
    1. Re:Sorry but wrong again. by aimew · · Score: 1

      I do not think that research should be restrained, just government spending. Much good has come from pure research that was thought by others to be 'wrong'. Perhaps my tongue was clenched a little too tightly in my cheek with my remark.

      I didn't say the atomic clocks were being curtailed, just the 'leap-second' for reasons of simplification in some areas, particularly Navigation.

      Precision is understood to be necessary to many endeavors; celestial navigation being the most obvious. The atomic clocks are available, in all their accuracy, for all. Even lowly PC users like me get to use it to sync-up my PC clock. There just is no need of 'leap-seconds' in everyday life and it was making more problems than solutions insofar as ocean navigation what with all the instrumentation that needed to be re-calibrated.

      I have military experience and have read Heinlein, however I fail to see how one second/year would have any effect whatsoever in a bomb site, arterial trajectory, or cruise missile launch. It would effect, very modestly, a Saturn probe launch; and then, only if the shot were purely ballistic, which they are not. No, 1 part in 31557168 would have little impact on Earthly weaponry.

      Grok this? ;->

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  107. The Earth is NOT a closed system per se by dadman · · Score: 1

    because there is the Sun pouring energy to the earth every second.

    So it is not strictly a bootstrap argument.

    1. Re:The Earth is NOT a closed system per se by aimew · · Score: 1

      Yes, the sun can effect the Earth. Weather is caused by the sun. I'm still not seeing the monsoons blowing on the Himalayas like the sails of a frigate and moving the Earth; however, as I said to someone earlier, there is reasonable doubt. I'll have to research this further; perhaps I'll apply for a grant. ;->

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  108. Re:OT: Bits and bytes by aurum42 · · Score: 1

    No, you're the one who is confused, I am afraid. Those "weirdos" you speak of were highly influential architectures from the history of computing (I'm 22 but I know my history :-) 8-bit bytes are standard on most architectures today, but there are still certain embedded platforms and the like which have non 8-bit bytes. The machine word size is typically the size of the data bus on the machine, and it is the "natural" unit of data storage on a machine - typically the amount of data it is possible to read and write in a single instruction (although, for example, i386 has vector instructions that can operate on multiple words, and likewise, FP units). So, when you term a machine a 32-bit machine, it almost invariably means that the machine word size is 32 bits. This, however, *can* differ from address sizes (i.e. pointer widths) etc.

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  109. Re:OT: Bits and bytes by Anonymous Coward · · Score: 0

    Modern processors tend toward powers of two, but lots of very important hardware (including the PDP-10) used 18 or 36 bit words. Bytes tended to be either six or nine bits, depending on whether you needed to represent lowercase letters and punctuation. Thus we have C specifying that a char is at least eight bits....

  110. Re:As no one got it right in the earlier article by aimew · · Score: 1

    Yes, I did know this but wasn't thinking about it with relation to monsoons blowing on the Himalayas. Hmmm... I'm still having trouble with the latter but I'll bow to reasonable doubt. More research needed, I wonder if I can get a grant? ;->

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  111. No More Leap Second? by FramtonM · · Score: 1

    Having just seen the scifi movie "The Core", I wonder why I find this story strangely intriguing?

  112. I was born on Feb 30, 1969 by CrystalFalcon · · Score: 1

    I was born on Feb 30, 1969. At least my fake ID says so. Funny; not one person noticed it in the five years or so I used that fake ID consistently. Not even when I asked them straight out what was wrong with the data they were looking at.

    People react immediately at Feb 29 of whatever year and check if it's a leap year. Feb 30 just passes as another date.

    Hell, I even have a library card using that fake ID. Even though it's been a long time since I used (or needed) the older identity, I still think it's kind of funny that nobody noticed. :-)

  113. Meta-Mod Justice by Anonymous Coward · · Score: 0

    Well, you've been vindicated in meta-mod, at least. Offtopic mod meta-modded as unfair. Love 604793.

    1. Re:Meta-Mod Justice by Anonymous Coward · · Score: 0

      Ditto here - I've just M2'ed it as unfair. Side question - the moderations for the post don't actually show an "offtopic", which is what I've been asked to meta-mod. Why would that be? Is it because an editor modded it?