... A simple Virasoro vertex algebra is rational (and -2 semisimple as well) iff its central charge is of the form c = 1 - 6(pppp ) , where p, p are relatively prime integers, greater than 1 (which are central charges of the so called minimal models). A simple affine vertex algebra Vk (g), attached to a simple Lie algebra g is rational (and semisimple as well) iff its level k is a non-negative integer. ... We call such f an exceptional nilpotent and such k an exceptional level. ...

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• http://www.mccme.ru/tg2007/talks/Singh.pdf
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... Star Atlas . ... stars . ... If neutron stars don't produce energy from fusion, like normal stars, how can they shine in visible light? ... Although it is true that neutron stars have, for the most part, consumed all their internal thermonuclear fuel, they tap into other energy sources to produce light. Indeed, neutron stars are remarkably "resourceful" and employ a variety of physical mechanisms to make themselves visible.A newborn neutron star is incredibly hot ? ... Atlas of the Stars . ...

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• elements | Astronomy.com
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This module provides for documents with Server Side Includes (SSI). ... Any document with handler of "server-parsed" will be parsed by this module, if the Includes option is set. If documents containing server-side include directives are given the extension .shtml, the following directives will make Apache parse them and assign the resulting document the mime type of text/html : AddType text/html .shtml AddHandler server-parsed .shtml The following directive must be given for ... cgi . ...

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• Starting Apache

Main Page Data Structures File List Data Fields Globals . Array element. More... #include < exchange.h > . char . ... diameter . double . ... Corresponds to one row of an OI_ARRAY FITS table. char _element::tel_name[17] . char _element::sta_name[17] . int _element::sta_index . float _element::diameter . double _element::staxyz[3] . The documentation for this struct was generated from the following file: . exchange.h . ...

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• Bojan Nikolic -- How to make an image in PGPLOT with correctly labelled RA/Dec
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... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

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An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . ... d) The Age of the Chemical Elements . ... Some isotopes (forms of the element with different numbers of neutrons in the nucleus) of these elements are radioactive; they change into other isotopes at a rate that can be measured accurately in the laboratory. ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

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. Input New Element: Entered element: . Number elements: . Filled array .

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Table of Contents | ... Index . Chapter 4 Statements This chapter describes all JavaScript statements. JavaScript statements consist of keywords used with the appropriate syntax. A single statement may span multiple lines. ... Chapter 5 Operators JavaScript has assignment, comparison, arithmetic, bitwise, logical, string, and special operators. This chapter describes the operators and contains information about operator precedence. ...

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• Index of /science/chianti/chianti_3.03/elements
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... It may be added, subtracted, divided or multiplied in any way appropriate for ordinary numbers. A mathematical relationship involving known numbers (like 25 or 40) and unknown ones (like x ) is known as an equation . ... To get a solution, one must replace the given equation (or equations) with others, containing the same information but cleaner in appearance. ... If you have an equation and modify both its sides in exactly the same way , what you get is also a valid equation. ...

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Pulkovo Photographic Plate Database . To find a certain plate, type its number, choose instrument and click button FIND Instrument: Normal Astrograph 26-inch refractor Plate number: . To find plates with a certain sky area: choose instrument, type coordinates (R.A. and Dec.) of the center of this area, type radius of this area, type (optionally) names of required objects, and click button FIND . ...

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... Mission Control Center, Korolev . At 11:16:00, Moscow Time, Soyuz TMA-13 descent vehicle returned to Earth. ... Lonchakov (flight engineer of ISS-18, commander of Soyuz TMA-13) and NASA astronaut M. Fincke (commander of ISS-18, flight engineer of Soyuz TMA-13) have completed their flight under the program of Expedition 18 to the International Space Station (ISS-18), and a spaceflight participant, US citizen C. Simonyi has completed his flight under the program of the visiting mission 16. ...

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Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The algorithm and appropriate program for decametric radiosignal propagation conditions prediction for paths from 500 to 9000 km have been developed at ISTP SB on the basis of normal wave method (AltyntsevaB.I,Iliyin N.V., Kurkin V.I. and others //Decameters channel simulation on the base of normal wave method . ... Solar activity indices are chosen automatically from the prediction date from the database . ...

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Research Activities . Integrated superconducting submm receivers and spectrometers. Technology for fabrication of superconducting integrated circuits based on high quality submicron Nb and NbN tunnel junctions with high current density. Development, study and optimization of the superconducting phase locked Local Oscillator for integrated spectrometer. ... Development of the superconducting elements for operation at frequencies up to 1 THz. ... Activities | ...

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The types of respirators in use at APO are half-face, full face, and mask-style filter types. ... These respirators DO NOT supply oxygen. ... The observatory does not maintain Self Contained Breathing Apparatus (SCBA) for use and, consequently, materials that require them cannot be used. ... Whenever possible chose adequate ventilation over using a respirator. ... Oxygen monitors used for confined spaces may be used to monitor oxygen levels where respirators are required. ...

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... SIXA FM ACCEPTANCE TESTS . ... In accordance to plan of the Acceptance Tests for Flight Models which was agreed in March 2000 in Moscow, the Acceptance Test of SIXA FM was carried out between 28 August and 2 September at VTT Automation, Finland. ... GOUCH for electronics box of SIXA-FM, Remark: not updated after changes made in 1994. ... Ground Test Program of SIXA-FM. ... Integration Test of SIXA FM, BIUS, ISS, DSS, and MPMI . ... Test data were written to MPMI, DSS-F, DSS-S and GSE SIXA-FM, . ...

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• General astronomical tools

The elements of the numbered minor planets are given with respect to the ecliptic and equinox J2000.0. ... In the Table these values are given to 0.01. ... A dash indicates that there is no opposition in 2015. 1 a.u., 1.017 a.u. 1 a.u., q <= 1.017 a.u.), At stands for Aten type ( a . ... It should be noted that all objects included into the Tables of NEAs, Centaurs and transneptunian objects, and some unusual planets can be also found in the Table of elements and opposition dates of all minor planets. ...

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• ENGAMPLE

... Окуляр 5 Element Plossl 32mm (2") . ... Поле зрения 60 градусов . Это самый короткофокусный из 2" окуляров серии 5000 - он предназначен для получения невысоких обзорных увеличений. ... Симметричные (Plossl) окуляры серии 5000 - прорыв в области оптического дизайна в сочетании с обычным качеством исполнения от Meade. ... Компактные цифровые фотоаппараты . Зеркальные цифровые фотоаппараты PENTAX . ... Окуляры PENTAX . ... Copyright PENTAR ї2004-2016. (бинокли, цифровые фотоаппараты, телескопы) . ...

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... 06.03.2001 . ... March 06 2001 09:00 (Moscow time) . The OC "Mir" operations scheduled for March 05 are complete. ... The onboard systems perform nominal, the Complex arrays generate enough electricity, the thermal mode is normal. Command complex was powered on and command software was entered in tne cause of communication sessions, pressure was equalized in pneumatic and hydrobus fuel tanks of the joint propulsion system of the core block of OC "Mir". ...

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• New Page 1

... astro-ph . ... A Catalog of almost 3900 variable stars . ... Properties of Dust Grains in Planetary Nebulae - I. The Ionized Region of NGC 6445 . ... A model of the ionized region is constructed, using the photo-ionization code CLOUDY 90.05. ... The most likely conclusion is that grains are residing inside the ionized region of NGC 6445 and that the low temperature and flux of the grain emission are caused by the low luminosity of the central star and the low optical depth of the grains. ...

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... Space flight . Crew training . ... Space camp . ... acquiring practical habits and skills of performing all the flight operations envisaged for a flight participant; . maintaining and honing professionally required qualities and skills for a successful activity in conditions of effect of adverse factors of a space flight, as well . ... preparing for the activity outside the spacecraft; . ... preparing for professional activity in conditions of effect of the space flight factors; . ...

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• Project Space Hotel