Astronomy Picture of the Day . A Small Double Ozone Hole in 2002 . ... Credit: SVS , TOMS , NASA Explanation: As expected, the ozone hole near Earth's South Pole is back again this year. ... Ozone is important because it shields us from damaging ultraviolet sunlight. ... The smaller size of the ozone hole this year, however, is attributed mostly to warmer than normal air in the surrounding stratosphere . ... 2003 2004 . ... Ozone Hole Reduced . A Near Record Ozone Hole in 2003 . ...

... Summary page . ... Printable page . ... This article is part of the LWN Porting Drivers to 2.6 series . ... If you have a char driver which needs direct user-space access (a high-performance streaming tape driver, say), then you'll want to map user-space pages yourself. ... int get_user_pages(struct task_struct *task, struct mm_struct *mm, unsigned long start, int len, int write, int force, struct page **pages, struct vm_area_struct **vmas); . ... Driver porting: Zero-copy user-space access . ...

Below is a list of all of the modules that come as part of the Apache distribution. ... mod_setenvif Apache 1.3 and up . ... mod_unique_id Apache 1.3 and up . ... Determining document types using file extensions . ... mod_rewrite Apache 1.2 and up . ... User authentication using text files . ... User authentication using DBM files . ... User authentication using Berkeley DB files . mod_auth_anon Apache 1.1 and up . ... User-configurable logging replacement for mod_log_common . ...

... Meade Instruments Corporation . ... Section 3: File Menu . ... Displays the dialog to open an existing image: . ... Saves the current image as a new file name or new file type, or both. ... This can be useful to prevent having 20 or more images open at once, and saves having to close them manually. ... This is done by creating a text file with the same name as the image file. ... Note that Image Information is saved within the FITS file, so there will not be a text file to accompany these files. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The Moon only shows one face to us because it is not rotating. Better astronomy : The Moon only shows one face because it is rotating, once every time it revolves around the Earth. ... Place the Moon model on the table about 30 centimeters (one foot) away with the X facing the Earth model. ... You'll see that to keep the X facing the Earth model, you have to rotate the Moon model as it goes around the Earth model . ... 2008 Phil Plait. ...

. Previous slide . Next slide . Back to first slide . View graphic version .

... The first task assumes the searching for chemical composition and sizes of particles which give the wavelength dependence of the extinction efficiencies close to the observed dependence of . Figure 7: Wavelength dependence of the extinction efficiency factors for homogeneous spherical particles of different sizes consisting of astronomical silicate and amorphous carbon. The dashed segment shows the approximate wavelength dependence of the mean galactic extinction curve at optical wavelengths. ...

Astronomical Data Analysis Software and Systems VII ASP Conference Series, Vol. ... Querying by Example Astronomical Archives F. Pasian and R. Smareglia Osservatorio Astronomico di Trieste, 34131 Trieste, Italy Email: pasian@ts.astro.it Abstract. ... The basic user query would simply be the submission of an input image, either 1­D or 2­D; the system should allow retrieval of archived images similar to an input one on the basis of some ``resemblance parameter''. ... the QUBE User Interface. ...

... Carefully measure the diameter of the craters formed by the impact without disturbing the sand. ... Crater diameter increases with increasing mass. ... Without disturbing the sand, carefully measure the crater diameter. ... Did you measure any difference in the diameters of the craters? Yes, as velocity increases, so does crater diameter. ... Impact cratering. ... Impact craters can be demonstrated with younger or less advanced students using mud instead of sand and ball bearings. ...

... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

... index.php (1) | bbclone/ | ... To do you can use the following sample and point your browser to it. <?php define("_BBC_PAGE_NAME", "Test"); define("_BBCLONE_DIR", "bbclone/"); define("COUNTER", _BBCLONE_DIR."mark_page.php"); if (is_readable(COUNTER)) include_once(COUNTER); ?> ... Create the file "count.php" and add the following: <?php define("_BBCLONE_DIR", "/the/path/that/leads/to/bbclone/"); define("COUNTER", _BBCLONE_DIR."mark_page.php"); if (is_readable(COUNTER)) include_once(COUNTER); ?> ...

... The files in this directory are for installing the latest version 3.0.0 of AstroImageJ on Linux, Windows, and Mac operating systems. ... If you already have installed version 2.0 of AIJ, simply use the update option on the AIJ toolbar 'Help' menu to upgrade to 3.0.0. ... Restart AIJ to use the new memory settings. ... Click "OK" and three files will be downloaded and installed in the proper location in the installation directory structure (again, you need write access to the installation directory)....

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... The HH flow associated with young stellar object HL Tau has an exciting history and even until now the origin of some its features is not clear yet. ... Knotty structures of Herbig-Haro jets are common phenomena and knowing the origin of such structures is essential for understanding the processes of jet formation. ... In the flow detected compact knots with high (-150 km/s) and bow shape structures in front of those, with low radial velocities (-50 km/s). ...

... 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...

... As we have seen, evolutionary considerations based on our current understanding of massive binary systems lead to the conclusion that BH+PSR binaries must constitute a rather numerous subclass of all binary PSR ( 1 per 1000 isolated pulsars; Lipunov et al. , 1994b[ 124 ]). It seemed a priori that the binary radio pulsar PSR B0042-73   in the SMC (Kaspi et al., 1994[ 81 ]) could belong to one of these two classes. ... This means that such binary pulsars should be discovered in the near future. ...

... ON THE ROLE OF LARGE-SCALE PLASMA IRREGULARITIES AT THE FINAL STAGE OF ANOMALOUS ABSOPTION DEVELOPING UNDER HF HEATING OF THE IONOSPHERE . ... Fig. ... With the aid of numerical statistical modeling based on multiple ray tracing it is shown that in presence of large-scale irregularities the reflected signal amplitude mean value is increased significantly. ... Dependence of the mean amplitude of the reflected from the ionosphere signal on the large-scale (10-50 km) electron density irregularity level...

... We revised topographical data obtained for the region to construct a generalized structure of the SPA basin as ringed formation. ... Because of our previous analysis of the ring structure [5, 6] we assumed the projection center o o coordinates as 180 W and 40 S. The hypsografic map shown in Fig. 1 demonstrates a hemisphere of the Moon which contains the SPA basin structure and its environs. ... Then we find the o o basin outermost ring center at roughly 180 and 40 S. Inner structure of the SPA basin...

... To get access to the software you must be registered at the ASC RadioAstron Server "ra.asc.rssi.ru" ------------------------------------------------------ IMPORTANT: At present the software "FAKERAT" runs only under 32 bit Linux workstation in X windows with C shell script. ... All procedure runs under C shell. ... Copy all files from the given directory to your computer. ... Then, copy txt-file representing the current version of orbit to the "orbit" subdirectory located in "fakerat_07041020". ...

... Pre-university education . ... On March 16 a meeting with Raymond Murphy - the author of the world famous series of English grammar textbooks: English Grammar in Use and Essential Grammar in Use took place in Samara State Aerospace University within the framework of the conference Peculiarities of grammatical skills formation in various stages of English language teaching (Innovative Approaches to ELT). ... The textbook of Raymond Murphy is a practical guide to learning English as a foreign language...