Expansion of Backfill algorithm for increasing efficiency of supercomputer «Lomonosov» Leonekov Sergei, SRCC MSU, Lomonosov Moscow State University Zhumatiy Sergey, SRCC MSU Department of Supercomputers and Quantum Informatics SLURM SLURM is a scalable, fault-tolerant cluster manager and scheduler for large computing systems. ... Output: modified queue state after each step of external scheduling 9 New Backfill-based algorithm Standard scheduler cycle (single partition example) looks like: 1. ...

... Select the M th largest element from an array. ... The technique is exactly the one used by experien cards: Pick out the second card and put it in order with out the third card and insert it into the sequence among the last card has been picked out and inserted. be used only for small N , ced card players to sort their respect to the first; then pick the first two; and so on until void piksrt(int n, float arr []) Sorts an array arr [1..n] into ascending numerical order , by straight ...

... 8, ``Celestial Mechanics'', 2002 Investigation of stability of NEAs orbital resonance motions by numerical methods L. E. Bykova Tomsk State University, Tomsk, Russia The problem of orbital stability of resonance Near­Earth asteroids (NEAs) is considered. Most of NEAs have multiple close approaches to the inner ma­ jor planets. ... The technique of the investigation of NEAs orbital stability has been devel­ oped by author on the basis of the construction of possible motion domains (R) of asteroids. ...

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

A very important stage in a story of formation of any new science is the shift from discussion of situation which are possible but do not occur in practice due to some reason to recognition of real phenomena of interest. ... We suggest to consider computer viruses as this new specific form of life which is coming in the contact with our form of life. ... Computer life has been created by human being, the role of independent evolution of computer viruses seems to be still negligible. ...

... Archives . ... Quote of the Week, July 12, 2007 . ArXiv] Complete Catalog of GRBs from BeppoSAX, July 13, 2007 . Jul 13th, 2007| 07:24 pm | ... From arxiv/astro-ph: 0707.1611 Probabilistic Cross-Identification of Astronomical Sources by Budavari and Szalay . As multi-wave length studies become more popular, various source matching methodologies have been discussed. ... Are there any power related studies on source matching statistics? ... Chandra Blog . ... Stat S/W Resources . ...

... Our computer services are free. One of our main computer priorities is providing e-mail access. ... Moscow high schools, math teachers, IUM students, and mathematicians can request UUCP accounts from us, for sending and receiving email from home. ... To get a UUCP account, one should arrive to MCCME in person and contact system administrator assistants ( room 306 , phone 2410500). Users who visit MCCME often can use e-mail in our computer room . ... Sergey Dubov, <dubov (at) mccme.ru>. ...

Next: References Up: No Title Previous: Scientifically discovered God . What does it mean, God being discovered scientifically, or Superintelligence? And what is the future science dealing with an endlessly complicated world? ... But a human lexicon has also so important words as ``to understand'' and ``to believe''. ... And how the scientifically discovered God which has been inevitably reached by the modern simple science correlates with the religious God? ...

This thread illustrates how to evaluate if your RGS observation is affected by pile-up; if so, how to deal with it in some special cases; and how to prevent it occurring. ... Pile-up will cause two coincident first order . ... Thus, pile-up may differ between RGS1 and RGS2 and may abruptly vary between CCD locations due to the nominal event pattern distribution variations over the detectors. ... Migration of photons from 1st to 2nd order (or from 2nd order to 3rd order) . ...

... The removal of the bright sky background from your IR images is one of the key steps in the data reduction process. Once bad pixels have been removed from all the astronomical frames, the object frames must have the matching sky background images subtracted from them. ... The simplest sky subtraction is where you have separate sky and object frames taken a short time apart. ... The resulting sky subtracted images should be examined to make sure that sky subtraction has been properly achieved. ...

... A well known problem with EOP prediction is that a prediction strategy proved to be the best for some testing period and prediction length may not remain as such for other period of time. In this paper we consider possible strategies to combine EOP predictions made using different analysis techniques to obtain a final prediction with the best accuracy corresponding to the least prediction error between input predictions. ... C2 ­ best previous prediction for given length. ...

... In our numerical experiments we have mainly considered two test objects provided by R. Hanisch and characterized by different types of brightness distribution; one of the objects simulates an elliptical galaxy and the other one a star cluster with size 512 512 and 256 256 pixels, respectively. ... The best performances in the restoration of the star cluster image are provided by the R-L algorithm and the LWPOS one; they give accuracies of 6%and 5%, respectively (see Table 1). ...

... We will consider the rms, (K), for observations with a receiver of system temperature, T , frequency resolution, per polarization, and total integration time per observing cycle, . ... For ``in-band'' frequency switching, the line under investigation is always in the observing band. ... Position Switching or ``Out-of-Band'' Frequency Switching: Here the line is only observed for one half of the time, with noise being present all of the time. ...

... F. A. Primini, and H. E. Payne, eds. Uniform Data Sampling: Noise Reduction & Cosmic Rays J. D. Offenberg1 , D. J. Fixsen1 , M. A. Nieto-Santisteban2, R. Sengupta1 , J. C. Mather3 , H. S. Stockman2 Abstract. ... Several solutions to the problem of identifying and removing cosmic rays exist. We evaluate Up-the-Ramp sampling with onthe-fly cosmic ray identification and mitigation, which is described in detail by Fixsen et al. (2000) and compared to Fowler Sampling (Fowler & Gatley 1990). ...

Next: MARK5 and EVLBI Up: Recording Systems. ... These are specified in the SCHED station catalog with the paramters CONTROL , DAR , RECORDER and DISK . The first element is the control system -- what software (and hardware) is used to control the recording system. The options that SCHED can handle for wide band VLBI observations are VLBA and VEX. ... The new control system will initially just control the new data aquisition system and recorder. ...

Next: Network logins Up: Major services in a Previous: Graphical user interface . Networking is the act of connecting two or more computers so that they can communicate with each other. ... Most basic services--filesystems, printing, backups, etc--can be done over the network. ... However, this book merely glances at networking; see the Linux Network Administrators' Guide for more information, including a basic description of how networks operate. ... Sun May 4 14:08:43 EEST 1997 ...

This note outlines how to configure the computers needed to run DIMMWIT. ... dimmwit : ICE (single-board computer in a box) that runs the Starlight Express CCD camera, to which it is connected by a USB interface. dimmwithost : displays the finder application via the X protocol (finder actually runs on dimmwit). Acts as a file server; both the finder software and the DIMM data are stored on dimmwithost. ... mkdir -p /data/oberon/data/finder . chown coast:coast /data/oberon/data/finder . ...

March 28-April 01, 1999 . ... A comparison of the SOHO/EIT and mosaic TRACE modified images at the same wavelength (171 A) of March 30, 1999. A complicated practically identical system of various large-scale chains and threads crossing each other and joining all active regions on the disk is present on both the SOHO/EIT (a) and TRACE (b) images. ... A modified SOHO/EIT movie at 171 A showing the evolution of the complicated chain system during March 28-April 01, 1999. ...

Using the Huygens and Babinet principles van de Hulst [ 11 ] considered the problem of light scattering and extinction by a particle having the size and the refractive index . ... The absorption cross-section is . ... The range of applicability of the anomalous diffraction theory for the scattering amplitude is limited by small angles, however the formules for the cross-sections became good approximations for a wide class of particles. ... This problem for spherical particles was solved by A.Ya. ...

... Play Information * Episode and Level # : E1M1 Single Player : Yes (Try it on Ultra Violence, hehehe) Cooperative 2-4 Player : Yes Deathmatch 2-4 Player : Yes Difficulty Settings : Yes New Sounds : No New Graphics : No New Music : No Demos Replaced : None * Construction * Base : New level from scratch Time Taken : Forever and ever... a really long time.. ... You MAY distribute this WAD, provided you include this file, with no modifications. ...