Try ntpdate -b
to get an accurate starting point
for ntpd to maintain precision.
Some Linux distros do this
in/etc/init.d/ntpd
if/etc/ntp/step-tickers
contains a remote server address.
time.windows.com and clock.redhat.com are within a few milliseconds of each other. It sounds like your laptop wasn't in sync. If your/etc/ntp.conf has a line saying "restrict default ignore" then you need to add another "restrict" line for the server(s) you want to use.
Unless you are running a stratum 2 server for hundreds of clients, it's polite to stay off the stratum 1 servers. Two or three us.pool.ntp.org servers do almost as well. My ISP's routers are stratum 3 NTP servers, and I use one of those.
I suppose you could also use it to tell whether it's quiet enough to make yourself heard without shouting. What the world really needs, though, is a cell phone that automatically switches to vibrate mode in a movie theater or concert hall. A light sensor wouldn't help because so many people carry their phones in purses or bookbags - and have to dig for 10 seconds before they can make them stop ringing.
The movie
Gattaca
is a study in the social consequences
of genetic profiling.
There is a homicide case in which the initial
suspect merely has the wrong genes; the
actual killer claims that his genes make
him incapable of violence.
I used to work on a web site for government surplus goods. One guy made it so that if a user searched for
"ARK, COVENANT"
they would get this quote from the end of Raiders of the Lost Ark:
"We have top men working on it right now."
"Who?" "TOP men."
Unfortunately, this feature was removed in a code review about a year after the guy left.
If there is no focusing, then would this actually enlarge the image?
The image size is proportional to the distance between pinhole and screen.
I think that the wax paper did the trick with resolution, because it would be a smooth surface.
Wax paper may look nicer than tracing paper.
Diffraction puts physical limits on how sharp
a pinhole image can be.
I use a #14 welding shade these days.
Nothing beats a telescope with a
full-aperture solar filter.
I used just such a device in 1986 and
described
it on Usenet in 1994.
By blocking ambient light, the tubes improve contrast so much that you can see clouds
near the sun.
You can look directly at the sun *without* any risks or problems, on a normal day. To focus, just move the smaller tube in and out like telescope.
Although you point it at the sun,
you are using rear projection,
not viewing the sun directly.
There are no lenses, so there's
nothing to focus.
I find it interesting that they
encourage
people to exchange supermarket loyalty/discount/surveillance cards.
I bias my own shopping toward stores that
don't use them, but does anyone know of similar
swap events in the States?
Not even HST can resolve the nearest stars
into disks. Instead of resolution, the Kepler project relies on sensitivity to changes in brightness. It continuously monitors a 10-degree
region of sky, watching for any of the stars
to dip slightly in brightness. If the dip happens regularly, then they conclude that a planet passed in front of the star, and they determine the size of the planet from the change in brightness. I suppose they would exclude stars known to fluctuate for other reasons.
The red color of the bottom "hydrogen light" image looks like visible H-alpha emission at 656 nm, but it's the infrared Paschen-alpha line emitted at 1876 nm when an electron drops from level 4 to 3.
Here's an
easy explanation
of the hydrogen spectrum.
NGC 4013 was also the subject of the
Hubble Heritage image
for March 2001. Here's a
ground-based image
from the WIYN telescope at Kitt Peak.
It's supposed to be visible in a 6-inch telescope.
Next clear night I'll take a look.
To live up to their slogan "As Real As It Gets," Microsoft may have to modify Flight Simulator 2004 so that 1 out of 3 times you contact ATC, you hear HAL 9000 sing "Daisy, Daisy..."
I found the second edition's self-conscious attempts at humor annoying. The first edition was much funnier, especially the part about sending clay tablets by carrier pigeon.
Since the popular press tends to use the least
familiar name for any given astronomical object,
I wondered, "Is there an NGC number for that?"
Apparently not. The faint
Palomar globular clusters
were discovered on photographic plates from an
all-sky survey by the 48-inch Schmidt camera.
They're supposed to be pretty tough to see
visually.
Palomar 5 is in Serpens Caput at RA 15h16m Dec -0.1 if you have a big scope and you're up to it.
Pacific Rim Sunrise
on
Crescent Sunset
·
· Score: 3, Informative
Here's the
Newsweek
article
mentioned in the Reuters story.
I think
the
shipper
who was supposed to take the stuff from Dover to Warner Robins is at fault.
Slashdot Mirror
Joshua E. Barnes published a paper on it in 1986. Here he describes his current treecode.
Try ntpdate -b to get an accurate starting point for ntpd to maintain precision. Some Linux distros do this in /etc/init.d/ntpd
if /etc/ntp/step-tickers
contains a remote server address.
Some of Comcast's routers are stratum 3 NTP servers. I used traceroute to discover and ntptrace to verify one near me.
time.windows.com and clock.redhat.com are within a few milliseconds of each other. It sounds like your laptop wasn't in sync. If your /etc/ntp.conf has a line saying "restrict default ignore" then you need to add another "restrict" line for the server(s) you want to use.
If you use multiple servers, ntpd will ignore the outliers and sync to the one with the smallest error bar. See RFC 1305 for details.
Unless you are running a stratum 2 server for hundreds of clients, it's polite to stay off the stratum 1 servers. Two or three us.pool.ntp.org servers do almost as well. My ISP's routers are stratum 3 NTP servers, and I use one of those.
...and the picture is a (nicely) doctored ripoff of this one from FHM.
I suppose you could also use it to tell whether it's quiet enough to make yourself heard without shouting. What the world really needs, though, is a cell phone that automatically switches to vibrate mode in a movie theater or concert hall. A light sensor wouldn't help because so many people carry their phones in purses or bookbags - and have to dig for 10 seconds before they can make them stop ringing.
The movie Gattaca is a study in the social consequences of genetic profiling. There is a homicide case in which the initial suspect merely has the wrong genes; the actual killer claims that his genes make him incapable of violence.
The Fast Facts page says what wavelengths are used in this image. H-alpha and N II are both red, so they probably mapped one of those to green.
I find it interesting that they encourage people to exchange supermarket loyalty/discount/surveillance cards. I bias my own shopping toward stores that don't use them, but does anyone know of similar swap events in the States?
The red color of the bottom "hydrogen light" image looks like visible H-alpha emission at 656 nm, but it's the infrared Paschen-alpha line emitted at 1876 nm when an electron drops from level 4 to 3. Here's an easy explanation of the hydrogen spectrum.
NGC 4013 was also the subject of the Hubble Heritage image for March 2001. Here's a ground-based image from the WIYN telescope at Kitt Peak. It's supposed to be visible in a 6-inch telescope. Next clear night I'll take a look.
To live up to their slogan "As Real As It Gets," Microsoft may have to modify Flight Simulator 2004 so that 1 out of 3 times you contact ATC, you hear HAL 9000 sing "Daisy, Daisy..."
Programming Perl
I found the second edition's self-conscious attempts at humor annoying. The first edition was much funnier, especially the part about sending clay tablets by carrier pigeon.
Since the popular press tends to use the least familiar name for any given astronomical object, I wondered, "Is there an NGC number for that?" Apparently not. The faint Palomar globular clusters were discovered on photographic plates from an all-sky survey by the 48-inch Schmidt camera. They're supposed to be pretty tough to see visually. Palomar 5 is in Serpens Caput at RA 15h16m Dec -0.1 if you have a big scope and you're up to it.
Taiwan, the Philippines, and New Guinea will see the eclipse at sunrise on June 11. This Sky and Telescope article has another map.
Here's the Newsweek article mentioned in the Reuters story. I think the shipper who was supposed to take the stuff from Dover to Warner Robins is at fault.
The Defense Reutilization and Marketing Service holds public auctions, but they exclude items with demil code "D".
I think we're on different pages. Several people cited this excerpt after September 11.