In Actor Prolog a resident is a special mechanism that helps processes to inspect state of other processes. A resident observes the state of a specified (target) process and if the state of the process changes (for instance, after message handling) it proves a specified predicate of the process. ... Work of the resident. ... Any change of the list of target processes or arguments of resident function results in activation of the resident and repeated collection of information in the target worlds. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

tranback -- Transform an X,Y position from output to input pixel position using the same conventions as drizzle tranback xout yout . xout = 400 [real] . ... The X dimension of the input image (this is used to determine the centre which is the origin of the transformations). (nyin = 800) [real] . ... If "output" the input image center is mapped to the center of the output grid, rotated about that center and then shifted along the grid of the output image. ...

... PISTON piston . ... this command is not used by the TCC The guide camera mechanical controller sets the filter, focus and other mechanical functions, but not the position of the guide camera in the focal plane. Positioning, if available, is handled by one or two guider position axes controllers , one per axis of motion. ... Notifies the controller that subsequent commands apply to the guider mechanical controller. ... Sets the piston of the guider to the specified value (in decimal microns). ...

... Activity 3: Measuring the Position of the Sun in the Sky . Purpose: To give students the opportunity to measure the position of the Sun in the sky using simple tools and methods. ... Alternatively, you may have students devise their own methods of relative measurement and apply them to measuring the position of the Sun in the sky. ... Rangi is the sky, and when the Sun is near Rangi's head it is summer in New Zealand. ... Read the Maori story to students. ... back to Teachers' Newsletter Main Page ...

... Exit Sub End If ' First argument is the FITS file to read filename = WScript.Arguments.Item(0) ' Create the ASCOM FITS driver object Set image = CreateObject( FITS. Image ) ' Read the file from disk WScript.Echo Reading filename ... image .ReadFromFile filename WScript.Echo ...done ' Read image dimensions WScript.Echo WScript.Echo ...

... Documentation for the Python objects defined by the project is divided into separate pages for each package, module, and class. The API documentation also includes two pages containing information about the project as a whole: a trees page, and an index page. ... A description of the package. ... A summary of the classes defined by the package. ... The module contents frame contains a list of every submodule, class, type, exception, function, and variable defined by a module or package. ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...

... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

Stellarium 0.12.3 . ... LinearFader Member List . This is the complete list of members for LinearFader , including all inherited members. counter (defined in LinearFader ) . ... protected . ... inline virtual . ... getMaxValue () (defined in StelFader ) . ... LinearFader (int _duration=1000, float minimumValue=0.f, float maximumValue=1.f, bool initialState=false) (defined in LinearFader ) . ... StelFader (bool initialState, float minimumValue=0.f, float maximumValue=1.f) (defined in StelFader ) . ...

Astronomy Picture of the Day . ... 1.01.2001 . ... During millennium two , humanity continually redefined its concept of "Universe": first as spheres centered on the Earth , in mid-millennium as the Solar System , a few centuries ago as the Galaxy , and within the last century as the matter emanating from the Big Bang . ... 2001 2002 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: universe - millennium . Publications with words: universe - millennium . ...

Groups, ends and trees: exercises II Michele Triestino 2015-07-22 Exercise 1. ... Show that the function dS : G Ѕ G - G defined by dS (x, y) = x-1 y S is a distance on G and coincides with the graph distance on the Cayley graph of G with respect to generating set S. Exercise 4. ... Let S and S be two different finite generating sets of a group G. Show that the Cayley graphs (G, S) and (G, S) are quasi-isometric. ... Show that the Cayley graph of a finite group is quasi-isometric to a point. ...

fitshdr - FITS-file headers manipulation tool fitshdr [options] [FITSfile_name] . ... fitshdr [options] --edit FITSfile_name . ... If You want to modify headers of FITSFILE using new FITS-header lines from HEADER file (or from stdin), You have to use this option (You can skip this option, if -H or --header option is used). ... Empty header lines are not displayed (in 'dump' mode only). --line-offsets . ... In 'dump' mode: file offset will be displayed for each header line. --no-line-offsets . ...

... International Astronomy Olympiad 2002 . ... The 7th International Astronomy Olympiad will be held on October 22-29, 2002 at the Special Astrophysical Observatory of Russian Academy of Sciences (SAO RAS) in North Caucasus. ... Authorized National Representative Astronomy Organizations (ANRAO) of the participating countries are authorized to form the teams of the Olympiad member-states. ... VII IAO . ... Information about the International Astronomy Olympiad 2003 will be known in the late 2002. ...

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

Next: Silicate minerals Up: A Database of Optical Previous: Database of Optical Properties . ... If necessary, data have been determined for the different crystallographic axes. ... In the following we give some examples of the data and their possible applications. Table: Summary of data measured in the Jena laboratory, which are currently available from the JPDOC. compound . ... amorph. ... Next: Silicate minerals Up: A Database of Optical Previous: Database of Optical Properties root 2003-03-06 ...

... A plasma instability involves plasma waves that grow exponentially or faster. For proper discription of a particular instability, one should be able to define . the mode of the growing wave . ... Other familiar examples are the Rayleigh-Jeans instability, in which a denser fluid is supported by a less dense fluid, and the Kelvin- Helmholtz instability , in which one fluid flows over another fluid, e.g., wind over water, causing surface waves to grow. ... Ballooning mode instability . ...

First results of X/S and X/Ka-band catalog combinations with full covariance information Andreas Iddink , Christopher Jacobs, Thomas Artz, Axel Nothnagel 22.09.2014 First results of S/X and X/Ka-band catalog combinations with full covariance information Andreas Iddink ­ 22.09.2014 Motivation Features of the ICRF2 ICRF2 (Defining- Sources ) 3414 ... Step: Import of the X/Ka catalog with full covariance information (Data provided by Christopher Jacobs et al. ...

... Newton's Laws . ... Mass . ... The most familiar force is weight, the downward force on an object due to gravity. ... In the absence of opposing forces, if a force does act on an object at rest or moving at constant speed, it accelerates in the direction of the force. ... By Newton's second law, the acceleration a of an object is proportional to the force F acting on it and inversely proportional to its mass m. Expressing F in newtons we now get a --for any acceleration, not just for free fall--as ....