... First of all, I should say that you cannot guarantee user-mode processes to have exact control of timing because of the multi-tasking nature of Linux. ... However, for most applications using I/O ports, this does not really matter. To minimise this, you may want to nice your process to a high-priority value (see the nice(2) manual page) or use real-time scheduling (see below). ... Linux 2.x kernels have soft real time support; see the manual page for sched_setscheduler(2) for details. ...

... Archives . ... Sep 9th, 2011| 01:05 pm | ... We organized a Special Session on Time Series in High Energy Astrophysics: Techniques Applicable to Multi-Dimensional Analysis on Sep 7, 2011, at the AAS-HEAD conference at Newport, RI. The talks presented at the session are archived at http://hea-www.harvard.edu/AstroStat/#head2011 . ... Tags: 2011 , AAS , HEAD , September , special session , Timing Analysis . ... AAS-HEAD 2011] Time Series in High Energy Astrophysics . ... Chandra Blog . ...

Next: Pulsar bin-mode observations Up: ATCA Bin Mode Observations Previous: ATCA Correlator Bin Modes . Miriad 's atlod task has an option, options=hires which converts a RPFITS file observed in high time resolution bin-mode into an apparently normal dataset with fine time resolution. ... In high resolution time mode, the time difference between consecutive integrations might be smaller than this tolerance. ... Miriad manager . ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

Next: The hardware and software Up: Keeping Time Previous: Keeping Time . ... Since the Earth is round, noon happens at different times in different places. This leads to the concept of local time . ... As soon as you need to communicate with distant places, you'll notice the need for a common time. ... Each local time is called a time zone. ... Other countries do not do this. ... In the US and some other countries, the local time zones have a name and a three letter abbreviation. ...

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... Following a micrometeoritic impact in Rev.#961 (March 2005), a new hot column appeared, whose effects leak across the whole column RAWX=318 . While a correction for this hot column is possible and implemented for MOS1 exposures taken in Imaging Mode, the offset value in MOS1 exposures taken in Timing Mode is too high for any meaningful correction to be possible. ... mos1.evt is the name of the MOS1 event list . ... RAWX in [320:329])" . ... Calculate the effective area due to the excised columns . ...

Underdetermined sets is a new type of data structures (terms) developed in Actor Prolog . ... The point is that an underdetermined set can include some indefinite rest (a tail) like a list in usual Prolog . At the same time, the order of elements of an underdetermined set can be arbitrary one and it does not affect results of unification of underdetermined sets. Moreover, Actor Prolog guarantees that a rest of an underdetermined set never contains elements that are explicitly given in the set. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Moon . Planets . ... Space Flight . ... Earth Satellites . ... ASTRONAUTS is the game that takes you to the edge of the Solar System. ... Astronauts is the ultimate space game as you race your opponents to explore the planets and moons of our solar system and then return safely back to Earth. ... Contents: 20 planet cards, 9 moon cards, 3 dwarf planet cards, 8 return to earth cards,16 special cards, dice & rules sheet. ...

... Data was taken with lbw and the mock spectrometers on 05may09 to investigate the problem with higher time resolution and bandwidth. ... 6 172 Mhz bands were taken centered at: 1200,1300,1400,1500,1600, and 1700 Mhz. 8192 channels (20Khz resolution) was used for the low time resolution (.1 second dumps). 4096 channels (40Khz resolution) was used for the high time resolution (.001 second dumps). ... The total power was computed for each 172 Mhz band and then plotted vs time (.1 second resolution). ...

... Shuang Ma 7006 2.4GHz Remote Control High Speed Racing Boat Ready to Run . ... Type: RC Boats . Features: Radio Control . ... Remote Control: 2.4GHz Wireless Remote Control . ... Control Distance: >100m . Boat/Ship Power: Built-in rechargeable battery . ... RC Boats . ... Package Contents: 1 x Racing Boat, 1 x Transmitter, 1 x Charger, 1 x User Manual . ...

Cosmic Rays . ... Credit Copyright: NASA Explanation: Have you ever been hit by a beam of high energy particles from above? ... Showers of high energy particles occur when energetic cosmic rays strike the top of the Earth's atmosphere. ... It is now known that most cosmic rays are atomic nuclei . ... The relative abundance changes with cosmic ray energy -- the highest energy cosmic rays tend to be heavier nuclei. ... This drawing illustrates air showers from very high energy cosmic rays . ...

Megan Murphy by Pete Sutherland Megan Murphy was a cowgirl, she rode five days a week She drove the horse drawn wagon tour in the town of Cripple Creek Cripple Creek 's a museum now, a little history lingering on And the Colorado goldrush is a long time past and gone One sunny summer afternoon in the bicentennial year Echoes of the goldrush seemed to ring in every ear High above the Rockies the sun was heading west Megan ...

... Science . ... Science Users Information > Observing with ESO Telescopes > Policies and Procedures > Director's Discretionary Time . ... Phase 1 Proposals . ... Up to 5% of the available general observing time may be used for Director's Discretionary Time Proposals (DDTs). ... proposals of a somewhat risky nature requesting a small amount of observing time to test the feasibility of a programme. ... Normally DDT proposals will be reviewed by the Director's Discretionary Time Committee (DDTC). ...

... It's Saturn time! When and where can I view Saturn? ... I'll never forget my first view of Saturn . It was a crisp clear winter night many years ago, and I had just completed making my first reflector telescope . ... I aimed my telescope at the bright golden object in the sky. ... The Cassini spacecraft speeds toward Saturn at 21,500 kilometers (13,000 miles) per hour and will reach Saturn just as the ringed planet disappears from our nighttime view in June. ... Observing Saturn in the sky. ...

... January 3, 1996 . The X-ray Timing Explorer . ... Explanation: Launched Saturday on a Delta rocket , the X-ray Timing Explorer (XTE) will watch the sky for rapid changes in X-rays . ... The Proportional Counter Array (PCA) and the High Energy X-ray Timing Experiment (HEXTE) will provide the best timing information in the widest X-ray energy range yet available. ... XTE 's All Sky Monitor (ASM) will scan the sky every 90 minutes to find new X-ray transients and track the variability of old ones. ...

... For SIMS (Secondary Ion Mass Spectrometry) analysis, a solid surface is bombarded by primary ions of some keV energy. ... The subsequent mass analysis of the emitted ions provides detailed information on the elemental and molecular composition of the surface. ... Extremely short ion pulses with a duration below . ... By rastering a fine-focussed ion beam over the surface, like an electron beam in an electron microprobe, mass resolved secondary ion images (chemical maps) can be obtained...

Herschel Guaranteed-Time Key Projects . at Arcetri . ... Both regard spectroscopic observations of different classes of star-forming regions in the Galaxy. WISH: WATER IN STAR-FORMING REGIONS WITH HERSCHEL . ... HS3F: HERSCHEL SPECTRAL SURVEYS OF STAR FORMATION REGIONS . ... Since gas cools mostly by line emission, knowing what molecules are formed and which lines are emitted in the different regions at different times is mandatory to understand the gas thermal balance. ...

As the Universe expands, gravity pulls on the Universe, and slows the expansion down over time. As we look to great distances, we are looking back in time. If we can measure how fast the Universe is expanding in the past, and compare it to how fast it is expanding now, we can see the total gravitational effect of all matter in the Universe. Here we plot the distance between two galaxies as a function of time. ... Universes with lots of material . ...

... 8, ``Celestial Mechanics'', 2002 EPM2002 and EPM2002C -- two versions of high accuracy numerical planetary ephemerides constructed for TDB and TCB time scales E. V. Pitjeva Institute of Applied Astronomy, St. Petersburg, Russia To be consistent with IAU resolutions ICRS should be treated as four-- dimensional reference frame with TCB time scale in which planetary ephemerides should be constructed. ... 2001, 80, 249-- 271. ... Standish E. M. JPL Planetary and Lunar Ephemerides, DE405/LE405. ...