... Bruce MacA Thomas 11 February 1999 Introduction In this discussion document, the antenna principles underpinning some of the concepts discussed in Ref 1 for the LF-SKA are extended to illustrate the potential difficulty of achieving constant collecting area, and hence the practical realisation of the "magic-carpet" concept. Applications to the "randomised" antenna-element approach to array-station design, and the trade-offs that need to be considered, are briefly discussed. ...

This document explains values, tables and other matters on solar physics computing pages. ... is040423.ete : SAHA-S tables, interpolation values: T, rho, X. Z is fixed at 0.02. See reference above. opal2005.etf : OPAL EOS, interpolation values: T, rho, X, Z. Downloaded from OPAL site , marked there as "2005", seems to be unpublished. opal2001.etf : OPAL EOS, interpolation values: T, rho, X, Z. Rogers F.J., Nayfonov A. Astrophys. ... The following values can be calculated: . ... dimensionless . ...

... A correlation between metal abundance and orbital elements (the eccentricity and angular momentum) has been found for three semples of disk stars of our Galaxy with abundance derived from detailed analysis. The correlation indicates that metal abundance in the Galaxy kept increasing after the birth of old disk stars and that the Galaxy kept collapsing during the formation of its disk subsystems. ...

Subject of Astronomy. ... Celestial Sphere. ... Spherical Frames of Reference: Horisontal and Equatorial Coordinates, Ecliptical System. ... Transformation of Celestial Coordinates. ... Change of Object Coordinates as a Result of Diurnal Rotation of Celestial Sphere. Phenomenons, Which Lead to Celestial Coordinates Change. ... Motion of Equator, Ecliptic, and Their Poles. ... Diurnal Solar Motion on Different Latitudes. ... Time Equation. ... Apparent Motions and Configuration of Planets. ...

. Diameter of circular antenna . 576 m . Number of antenna elements . 895 . Size of an element . 11.4 x 2 m . Geometrical area . 15000 m 2 . Effective area of full circle . 3500 m 2 . Wavelength range . 1 - 50 cm . Frequency range . 610 - 30000 MHz . Maximum angular resolution . 2 arcsec . Accuracy of coordinate determination . 1-10 arcsec . Flux density limit . 0.500 mJy . Absolute brightness temperature limit . 0.050 mK . Tracking time (South sector + Flat mirror) . 1-3 h . [RATAN-600 Homepage]

... For given geographical longitude and time zone show the current data and time, Universal data and time, current local star time. ... Accept 10 different data formats (data&time, data with decimal day of month, data with decimal day of year, decimal year, some Julian dates), calculate from any formate to others, show day of week. Current data and time direct insertion function is exists. ... Calculate angular distance between two points at the sky by its equatorial coordinates. ...

Amanda Karakas One of the most important research fields in astrophysics is the study of the origin of the elements. ... Asymptotic Giant Blanch (AGB) Stars: For low and intermediate-mass stars (with initial masses between about 0.8 to 8 solar masses) the most important nucleosynthesis occurs when stars evolve off the main sequence to the giant branches. ... This indicates that these stars obtained their unusual abundances via mass transfer from a previous red giant star, that has long evolved away. ...

... IR-Light Emitters & Detectors . Russian High Technologies . ... Infrared detectors and light emitters are key components that are used for applications including radiometry, guidance, gas analysis, medicine etc. ... Devices are operating in spectral range of 1.0-5.0 um and have high efficiency. ... Light Emitters . ... Spectral response of PRX 27.. ... Applications . ... Among the features there are high speed response, high efficiency, wide temperature range. ... IR-Light Emitters and Detectors | ...

... In laboratory the design and a manufacturing techniques mirror aspherical optics are developed ("fokon", ellipsoid, aspherical mirror).Such optical elements are made of widespread aluminium alloys on the standard equipment without use diamond turning. ... Using: optical blocks of not image optical devices for transitions, collimation, focus (concentration) radiations in a wide spectral range from UV to IR. Focusing and collimation of light; . ... circle aperture/ring aperture; . ... Back Forward . ...

... SSAU History . SSAU roadmap . ... Engineers of SSAU laboratory of additive technologies started to carry out experiments in the field of 3D-printing of metal parts, components and assemblies. The research of Samara scientists will allow producing highly complex and non-standard elements of spatial forms required for design and creation of advanced aviation and space technology. ... SSAU Laboratory of Additive Technologies is established in 2011. ... e-mail: ssau@ssau.ru . ...

... Proximity e#ects of com­ ponents (reflection of radiation and surface gravity darkening) are taken into account. ... As an example, we consider the Algol (# Persei) system, where an eclipsing pair (Algol A­B) is accompanied by the third component (Algol C). ... The surface temperature distribution for Algol A­B system before (upper plot) and after (lower plot) correction for temperature due to the irradiation e#ect. ... We solve this equation by the iterative Newton­Raphson method. ...

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 . ...

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Constraining Stellar Interiors and Mixing via Depletion Sequences of Light Elements . ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... Lithium (Li), beryllium (Be) and boron (B), usually referred to as "the light elements", represent a powerful diagnostic for studying stellar interiors and stellar mixing. ...

Microsymposium 40, abstract 88, 2004 (A4 format) GAMMA RAYS FROM MAJOR ELEMENTS BY THERMAL NEUTRON CAPTURE REACTIONS: EXPERIMENT AND SIMULATION FOR PLANETARY GAMMA-RAY SPECTROSCOPY. ... Then the calculation can be restarted by producing gamma rays and let them trans- GAMMA RAYS FROM MAJOR ELEMENTS BY THERMAL NEUTRON CAPTURE REACTIONS: N. Yamashita et al. port and react, with initial energies determined the outside multiplication and initial locations wh neutron capture reaction took place. ...

Difference in chemical composition between the stars 16 Cyg A and 16 Cyg B, versus the condensation temperature of the elements in the proto-planetary nebula. If the stars had identical chemical compositions then the difference (A-B) would be zero. ...

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 | ...

... Shustov B.M., Wiebe D.S. Dust expelling from the Galaxy ( abstract from the journal ). Astronomy Reports , 1995, 39 , 578-586 [AZh, 72 , 650-659]. Wiebe D.S., Shematovich V.I., Shustov B.M. Chemical and dynamical evolution of protostellar clouds: initial stages of collapse ( abstract from the journal ). ... Shustov B.M., Wiebe D.S., Tutukov A.V. Evolution of disk galaxies and loss of heavy elements into the intracluster medium. ... ApJ (Letters), 1998, 503 , L71-L74 ( astro-ph/9806155 ). ...

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 | ...

Rocket R-5 . ... The rocket R-5 engine was provided with a special extension nozzle that enabled to increase a flight range up to 1200 km. ... Prior to carry out flight tests at the 2 NII-88 affiliate division, firing bench tests of rocket R-5 were run. ... A launch range of all 7 rockets was 1185 km. ... With a 37% increase in the R-5 launch mass its firing range increased two times as compared to R-2, masses of fore bodies being practically equal. ... Official WEB-site of S.P.Korolev RSC Energia . ...

Stellarium 0.12.3 . ... FileљStructure . FileљList . FileљMembers . core . planetsephems . calc_interpolated_elements.h . ... 6 љ copy of this software and associated documentation files (the "Software"), . ... 26 љ void CalcInterpolatedElements( const double t, double elem[], . ... 36 љ The cache consists of 3 sets of values: . 37 љ e0[0..dim-1] are the cached values at time *t0, . ... 41 љ (*calc_func)(t,elem) calculates the values elem[0..dim-1] at time t, . ...