. XMM-Newton Science Analysis System . ssclib (ssclib-3.29) [xmmsas_20060628_1801-7.0.0] . Meta Index / Home Page . Module name: random_aux . Author: Ian Stewart (University of Leicester, ims@star.le.ac.uk) . XMM-Newton SOC/SSC -- 2006-06-28

... Tools . ... In order to generate random numbers that follow a normal distribution, one first needs to create two uniform random numbers $u_{1}$ and $u_{2}$, in the range of 0 to 1. ... begin{equation*} g_{1} = \sqrt{-2 \ln(u_{1})} \cos(2 \pi u_{2}) \end{equation*} . ... Random numbers following a power law, $P(x) \propto x^{n}$, can be generated from a single uniform random number, $u$, in the range of 0 to 1 through the following transform : . ...

... Users . ... Here are a few features of the tweets from the JWST appearance at SXSW ( JWST@SXSW ). ... The retweet numbers are close to the values that Twitter has for the tweets, which means that I can't have messed up too much (I wouldn't expect perfect agreement since Twitter does not guarantee that any search will return all matching tweets). The most re-tweeted accounts. ... Number of re-tweets . ... The number of tweets used in this analysis is and the graph accounts for of this total. ...

... The numbers of three types of compact binaries containing accreting NSs and BHs, which are most interesting from the point of view of their observational appearances, have been calculated as a function of time: i) X-ray transient source containing a NS in an eccentric orbit around a main sequence Be-star (the observed prototype: A0535+26), ii) BH The evolution of the selected types of X-ray binaries during the first 10 million years after the starburst onset is presented in Fig. ...

... The absolute magnitude of the RCBs in the LMC and the small number of Galactic RCBs implies that they are very rare stars. Together with statistics for related stars, the total number of hydrogen-deficient stars in the Galaxy is estimated to be about 1000 ([ Warner 1967 ]). Whilst the luminosity of RCBs is similar to that of other low-mass stars as they evolve rapidly from the asymptotic giant branch to become white dwarfs, their frequency is much lower. ...

Minimum: 0; Average: 47; Maximum: 99 . Results divisible by: . 2: 52%, 3: 33%, 4: 25%, 5: 21%, 6: 18%, 7: 14%, 8: 12%, 9: 13%, . Range . Graph . Pct  . Count . 10 . 6 . 25 . 20 . 11 . 43 . 30 . 11 . 42 . 40 . 12 . 46 . 50 . 9 . 35 . 60 . 12 . 47 . 70 . 11 . 42 . 80 . 8 . 31 . 90 . 8 . 32 . 100 . 11 . 42 .

Random numbers ­ a note · How can a computer generate a "random" number? ... Maximal sequence length is m 30/10/2007 Computational Physics 2007 Distributions · Basic generator is uniform on [0,m]. ... 30/10/2007 Computational Physics 2007 Generators · Many random number generators: ­ f95 intrinsic functions · call random_number (harvest) . ... 30/10/2007 Computational Physics 2007 How "random"? ... 30/10/2007 Computational Physics 2007 About software How can it go wrong? ...

Организаторы: Michel Balazard (CNRS, Лаборатория Понселе) , Михаил Цфасман (CNRS, Лаборатория Понселе, ИППИ РАН) , Алексей Зыкин (Лаборатория Понселе, ГУ ВШЭ) . О конференции . ... One of the big questions in the area of curves over finite fields concerns the distribution of the numbers of points: Which numbers are possible as the number of points on a curve of genus $g$? The same question applies to various subclasses of curves. ... Страница Лаборатории Понселе . ...

... Each DFS Department official document has to be issued according to the following internal procedure. Documents to be distributed outside DMD division must also be issued according to the Technical Archive procedure . ... Several documents are also available as complete templates defined internally for DFS Department documentation (e.g. template for Test Plan, for Test Report, .. ... Define the internal document number as: dfs-volxx-yyy-zzzz . ... Document title, . ... Issue number (e.g. 1). ...

... HST . Proposal Table by Number . ... HST Peer Review Process . ... HST Overview . ... Phase I Proposing . ... FUV HV History . ... COS Data Handbook . ... 10/11/2010 - Phase IIs for calibration proposals with observations before January 1, 2011. 10/25/2010 - Phase IIs for calibration proposals with observations after January 1, 2011 . ... PhaseI . PhaseII . ... COS FUV Detector Gain Sag vs. ... COS/FUV Recovery after Anomalous Shutdown . ... COS/FUV Characterization of Detector Effects . ...

... Arithmetic Functions . Random Numbers . String Conversion . Searching and Sorting . ... There are 4 basic integer functions: . int abs(int number); long int labs(long int number); div_t div(int numerator,int denominator); ldiv_t ldiv(long int numerator, long int denominator); . ... In practice no functions produce truly random data -- they produce pseudo-random numbers. ... The stdlib.h provides 2 useful functions to perform general searching and sorting of data on any type. ...

... Using the central limit theorem, the total noise can be approximated by a Gaussian or normal distribution which has the frequency function : . ... where is the mean intensity of the source. ... In the statistical analysis of the probability distribution of data several estimators based on moments are used. ... For a normal distribution, these moments are and while for a Poisson distribution are and . Besides these moments other estimators are used to describe a distribution e.g. median and mode . ...

... We demonstrate through numerical simulations that model parameters estimated with our technique are essentially bias-free, even when the average number of counts per bin is 1. ... The IW technique avoids such biases by estimating through successive iterations, where for each iteration, j, , and the best-fit parameters are determined by minimization of . ... In our sample, we find that the minimum values and best-fit parameters converge after about 6 iterations. ...

... Position Switching Separation Tolerance with Arecibo in L-Band . ... Arecibo Elevation Wheel and Track Life . ... Carl Heiles . ... Dynamics of the Arecibo Radio Telescope . ... The Future: Ultra Wide Band Feeds and Focal Plane Arrays . ... 2002-03 (pdf) . ... 2002 May . ... 2001-09.pdf . ... Multi-Beam Array System Feed Selection . ... 2000-07.pdf . ... The LBW Feed: The Mueller matrix in 1999 and 2000 . ... P. Perillat . ... Feed Resonances in Wide L-Band Gregorian Feed . ... J. Cordes, J. Lazio ....

God Science Forum Message . Forums: . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... Discussion Forums | God and Science | ... Nothing? Beyond Numbers.. Forum List | ... You do not know your future; yet it feels as if it is ALREADY known. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

... Number nine will put you on the spot. ... Naughty number nine. ... Is that it's one less than ten. You see, nine is the same as ten minus one. ... I mean, eight times nine is 80 minus eight, . And seven times nine is 70 minus seven, . And six times nine is 60 minus six. ... With naughty number nine. ... One times nine is nine, and two times nine is 18. Mean ol' number nine. ... Eight times nine is 72, and nine times nine is 81, . ... With naughty, nasty, mean ol' number nine. ...

... Forum: The Linux Kernel Hackers' Guide . ... Keywords: kernel tuning, file handles, Bus error . ... Increasing number of open file handles in kernel. I have successfully increased the number of files on my system (Linux 2.0.30) by editing the following file: . ... I also increased NR_INODE to 5000, and NR_FILE to 4096. I then rebuilt the Kernel (and modules for good measure) and installed the new image. ... Increasing number of open files parameter by Simon Cooper . ...

... Insert date: . Day: . Month: . ... This CGI -script calculates a day of week of the given date, Julian date of Greenwich noon JD and extracts from the database indices of solar activity: Wolf number for the day W , monthly W m and yealy means W y of Wolf number for month and year of the date. The prediction of Wolf number (which was made in 1998 and, hence, lost actuality) is also presented. The database uses solar activity data got from server of National Geophysical Data Center . ...