... Circles are used to depict the source positions. ... A optional ID label can also be displayed alongside the circle, corresponding to the row num- ber of that source in the input source list. ... These circles are in fact DS9-type regions, which can be written out to a le for future use (for example, when running a later DS9 session) by setting withregionfile to true, and specifying the desired le name via the regionfile parameter. ... This is a text le containing region descriptions for each source...

... Empirical and theoretical modeling of 3-D structures in the solar corona is confronted by the tremendous amount of data needed to represent phenomena with a large dynamic range both in size and magnitude, and with a rapid temporal evolution. Octree representation of the 3-D coronal electron distribution offers the right compromise between resolution and size, allowing computation of synthetic images of the solar corona. ... The time interval between images is one day. ...

AY 193 Homework 5 : Sampling Due Feb 25 1. Generate 10,000 Poisson random deviates each using rejection sampling for the cases =1,10,100 (do NOT use builtin methods except to get draws from a uniform distribution). ... Plot histograms of the distributions and overplot the corresponding density distributions 3. Compute means of 10 consecutive random deviates from the samples from [1] and make histogram plots of the distributions of the means. ...

Analysis of general features of the chaotic system behavior and investigation of the properties of concrete chaotic sources. ... Analysis of information properties of chaotic systems and chaotic oscillations as concrete objects for information processing and comunications. ... This hypothesis gives a possibility of designing simple mathematical structures accomplishing various processes of information processing using chaos. ... Activities | ... E-mail: chaos@mail.cplire.ru ...

Next: Flagging, Manipulating and Examining Up: Generating Dummy Visibility Data Previous: Making a Fake Observation . If you just want to generate visibilities corresponding to a particular model image, and do not care whether they follow realistic tracks in the uv plane, then im2uv may suit you. Task im2uv simply Fourier transforms an image (whose units should be Jy/pixel) and writes this transform into a visibility dataset. ... IM2UV . ... Normal visibility selection. Only visibilities . ...

STIS Instrument Handbook for Cycle 24 . ... Space Telescope Imaging Spectrograph Instrument Handbook for Cycle 24 > Chapter 6: Exposure Time Calculations > 6.4 Computing Exposure Times . ... Computing Exposure Times . 6.4.1 Calculating Exposure Times for a Given Signal-to-Noise . ... Expected count rate from your source over some area ( C ); . ... In the optical, each photon generates a single electron (i.e., counts в the gain correspond to the total number of electrons). ...

Astronomy Picture of the Day . ... In this false-color picture, light blue regions are extremely hot - over 1 million degrees, while dark blue regions are slightly cooler. ... On the left is a normal star field containing the constellation Orion. ... A Star Where Photons Orbit . ... A Wolf-Rayet Star Blows Bubbles . ... Wolf-Rayet stars can blow bubbles. ... Wolf-Rayet stars generate bubbles because they continually eject their outer atmosphere as a stellar wind. ... Dark Bok Globules in IC 2944 . ...

Next: The Quasi--Newton Method. Up: Outline of the Previous: The Newton--Raphson Method. ... At each iteration, one computes . ... Neglecting the second derivatives matrix , we obtain the ``normal equations'' and the Gauss--Newton direction . This so--called Gauss--Newton method is intended for problems where is small. ... The algorithm implemented here is a modification of that Gauss--Newton method, that allows convergence even for rank deficient Jacobians or for large residuals. ...

The low pass digital filters (lpdf) were simulated in software. ... Generate an in band sine wave (amplitude=10) and process it through the lpdf for each decimation. Generate noise (with an rms of 10) and filter it with the 4 decimations. ... Page 1: filter for decimate=4,8,16,32, The dcGain is the integral over each filter divided by the decimation length. ... Page 2: pushing a sine wave through the filter. ... Bottom: (sine waves)/decimation after filtering. ... Page 3: filtering noise. ...

The VIRGO project is a physics experiment; its aim is the detection of gravitational waves. ... It has not yet been possible to detect directly the gravitational waves: it remains one of the major challenges of experimental physics. ... Interferometric antennas for gravitational waves Gravitational waves distort space-time: along two perpendicular directions, the distances between fixed points will increase (resp. decrease), at the arrival of a gravitational wave. ... Publications from our Group . ...

... May 17, 1999 . How to Search for Aliens . Credit: SETI@home , UC Berkeley SETI Team . Explanation: "Mom, can I use our computer to search for aliens?" Last week, the SETI@home project released free software that enables many home computers to search for signals from intelligent extra-terrestrials . ... The resulting software can work as a screensaver and so after down load ing a chunk of data, will only search for alien signals when the computer is otherwise idle. ... About APOD > . ...

. Album : asv-album :: Travels to distant places and countries :: 1999/09 Florence, Rome (Italy) :: 12/09 Firenze . Up . << Prev . You have to be computer geek to understand the fun of this picture. Next >> . Photo album generated by album tool from David Ljung 's MarginalHacks on Tue Jun 23 14:46:55 2015 .

My research interests are focussed on the theory and modelling of accretion processes as well as star and planet formation mechanisms. I am particularly interested in the stability properties of accretion discs, the generation of MHD turbulence and associated angular momentum transport, disk - planet interactions and the origin and characteristics of jets and winds from accreting systems . ... These results have been published in Salmeron & Wardle, 2005, M.N.R.A.S., 361: 45-69. ...

. ___________________________________________________________________ The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

Up: EXTREME HELIUM STARS: PULSATION Previous: Bibliography . EXTREME HELIUM STARS: PULSATION AND EVOLUTION . This document was generated using the LaTeX 2 HTML translator Version 98.2 beta6 (August 14th, 1998) . Copyright ї 1993, 1994, 1995, 1996, Nikos Drakos , Computer Based Learning Unit, University of Leeds. Copyright ї 1997, 1998, Ross Moore , Mathematics Department, Macquarie University, Sydney. ... The translation was initiated by Simon Jeffery on 2002-01-25 . ... 2002-01-25 ...

... 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...

... OOF . ... Zernike Polys . ... The circle polynomials of Zernike, or Zernike polynomials, are an infinite set of polynomials orthonormal on the unit circle. ... The table below shows the first twenty Zernike polynomials and the corresponding model beams. ... The first column in the table shows some of the labels that are used for the Zernike polynomial shown. ... Plots of Zernike polynomials typically used in the OOF holography fitting and of corresponding in-focus and out-of-focus beams . Label . ...

... Tonight's Sky . ... Sky this Month . ... space flight . ... space physics . ... The Sky This Week: April 1 - 10 . ... Sky this Week . ... Massive computer simulation detects cause of high-speed electronics in space . ... A mysterious phenomenon detected by space probes has finally been explained thanks to a massive computer simulation that was able to precisely align with details of the spacecraft observations. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

Castalia . Asteroid 4769 . Asteroid 4769 Castalia is a near-Earth crossing asteroid that was discovered by Eleanor F. Helin (Caltech) on August 9, 1989. Scientists used radio astronomy and computer modeling to generate this image of Castalia. They obtained the data for the computer model in 1989 using the Arecibo radar/radio telescope in Puerto Rico when the asteroid passed within 5.6 million kilometers (3.5 million miles) of the Earth. ... Topographic Map of Castalia . ...

Spatially inhomogenious modes of logistic equation with delay and small diusion in a at area Vladimir Goryunov Novemb er 17-19, 2015 Vladimir Goryunov Spatially inhomogenious modes of logistic equation with17-19, and small diusion November delay 2015 1 / 18 We consider the boundary value problem from the population dynamics N = d N + r (1 - N t -1 )N , N = 0, where N = N ... Times Vladimir Goryunov t = 4713, 9807. ...