Astronotes Armagh Planetarium's Stellar Blog! ... Alien Life . ... Space Flight . ... Science Fiction . ... Posted on January 30, 2015 | 3 Comments Dyson spheres are an outrageous concept. ... Continue Reading.. ... Posted on November 7, 2013 | 1 Comment November 9 is Carl Sagan Day when enthusiasts of astronomy and science remember and celebrate the life and works of Carl Sagan. ... Posted on September 27, 2013 | ... Posted on July 18, 2013 | ... Posted on May 9, 2013 | ... 13 Comments , . ...

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

... start : ranking . ... SAI VO Projects . ... Help on Wiki search . ... Ranking search results ====== ==== tf-idf ==== code CREATE OR REPLACE FUNCTION my_rank (tsvector, tsquery, int ) RETURNS float AS $$ use List::Util qw(min max); my ($string, $ query ) = @_; my $maxpos = 0; # Parse tsvector, taking into account positional information foreach (split / /, $string){ if(/^'(\w+)'(:([0-9,]+))?$/){ foreach(split /,/, $3){ $ vector {$_} = $1; $maxpos = max($maxpos, $_); } } } my @ vector = map {$ ...

Statistics of sunspot activity . The sunspot indices . ... Visual indices of solar activity . ... n - number of spot groups . A - Waldmeier class of unipolar spot groups without penumbra . B - class of bipolar spot groups without penumbra . C - class of bipolar spot groups with one penumbra pole . D - class of small bipolar spot groups with two penumbra poles . E - class of middle bipolar spot groups with two penumbra poles . ... H - class of unipolar penumbrated spot groups . ...

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SAI, graduates year 1982. ... Note: when just a 7-digit phone number is shown, it refers to a phone located in Moscow (international access 007-495). "+" in front of a number means that you must dial an international access code first (or just press "+" on your mobile phone keypad). ... 939-1672(work); . ... Ataev Sasha . 1-(703)-536-8881(home) (USA); . ... Bychkov Sergey . ... 1-(410)-740-8205(home), +1-(301)-286-2150(work) (USA); . ... 1-(412)-767-0332(home), +1-(412)-608-9339(mobile) (USA); . ...

The first persistent Web agent that we have created on Actor Prolog is a program that collects information about research groups that develop Prolog and projects in the field of logic programming. The agent looks through a given list of Web sites and calculates some attributes of the sites: the date of recent modification, total size, the number of figures, the number of outside links, the number of error links, the number of given keywords, etc. ... http://www.cplire.ru/Lab144/space/prolog.html . ...

... Tables for transformation from sidereal to universal time scale. Explanations. This page contains three little tables headed Hours Minutes Seconds respectively. Each the table have two columns: first of them is input column where time in whole time units of sidereal time is given, and second of them is output column where hours:minutes:seconds of universal time is presented. ... Example: transform 02 h 12 m 22.00 s from sidereal to universal time. ...

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