Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... A most promising problem is to investigate the interaction of two VHF powerful radiowave beams in the ionosphere, whose difference frequency is equal to the plasma frequency in some ionospheric area (that is, the difference frequency is taken in the range 1-8 MHz). ... Two-frequency interaction effects are based on radiowave non-linear mixing, which is rather complicated when describing and modelling the experiment. ...

... InformChaos Lab took part in CeBIT-2015 (Hannover, Germany) with "Active Ultra Wideband Wireless Networks". ... Lev Kuzmin received Dr.Sci. degree for his thesis "Wireless information transmission over UWB chaotic carrier" from IRE RAS. ... Artem Nikishov received Ph.D. degree from the Moscow Institute of Physics and Technology for the thesis "Generation of microwave chaotic oscillations in self-oscillating systems with several active elements". ... Our Products page is renewed. ... News | ...

For circular orbits around Earth, we found . ... The distance of a satellite from the center of Earth in meters is an inconveniently big number, even before we raise it to the 3rd power. ... SQRT (25 638 838) = 5063.5 From this . ... T= 5063.5 seconds SQRT(r') 3 = 5063 sec r'SQRT=(r') . This is the practical form of Kepler's 3rd law for Earth satellites. ... International communication satellites are in the equatorial plane of the Earth and have orbits with a 24-hour period. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Puerto Rico is in a highly desirable location from a global geodetic VLBI point of view.€а It is located on the Caribbean plate, and it is near the equator.€а A geophysical goal of the next generation geodetic observing system is to have at least one observatory on each tectonic plate, and Arecibo will provide this with the implementation of the broadband signal chain on the 12m antenna.€а A second benefit of the site is to ...

home events . ... Other Workshops, Conferences and Events . ... NSTA conferences offer the latest in science content, teaching strategy, and research, all presented by science educators who want to enhance and expand their professional growth. ... 2012 National Conference . ... This event promises to be a standout event with panels, fireside chats, lightning talks, book signings, and ... an extended opportunity to schmooze with glitterati from the worlds of science and science-based entertainment. ...

... exoplanets . ... Ground-based detection of super-Earth transit paves way to remote sensing of small exoplanets . ... The transit of exoplanet 55 Cancri e is the shallowest detected from the ground yet, and the success bodes well for characterizing the many small planets that upcoming space missions are expected to discover in the next few years. ... Until now, the transits of only one other super-Earth, GJ 1214b circling a red dwarf, had been observed with ground-based telescopes. ...

... Dr. Denis Bulaev . ... Talks . ... Invited Talks . Anomalous spin relaxation in nanotubes (in Russian) . ITP Seminar , Kapitza Institute for Physical Problems RAS , Moscow, Russia, September 6, 2007. Spin qubits based on quantum dots in III-V semiconductors and graphene (in Russian) . ... Spin properties of electrons and holes in quantum dots (in Russian) . ... Electric dipole spin resonance and spin decoherence for heavy holes in quantum dots . ... Spin qubits in graphene quantum dots . ...

Databases (NSDC) of the Natural Planetary Satellites. ... NSDC: Database of astrometric observations of Natural Planetary Satellites . ... They are thoroughly looking for observations in different sources, creating their owndatabases which are then mostly inaccessible to other researchers. ... In the file "content" with explications, the reference is given to the data source as well as the bibliographic reference. ... Data sources. ... Why a specific bibliographic database for Natural satellites? ...

... G., Filippova A.S. Presented by: Filippova A.S Achievements · Refined model based on the celestial-mechanics methods is presented that is a generalized version of the previously developed basic model · Subtle effects are qualitatively explained based on the amplitude-frequency analysis and the computer numerical modelling of the oscillatory pole motion, where the key feature is the Chandler wobble 2 Basic Model of the Polar Oscillations ...

... Research . ... Past and present projects and other research activities . ... These projects range from: the end-to-end systems modelling, design and commissioning of an optical to near-infra-red stellar coronagraph at the William Herschel Telescope, a European Space Agency design study into fold-out large aperture space telescopes, prototyping 'Smart' X-ray mirrors for next generation X-ray telescopes and R into future adaptive optics. ... OSCA - an Optimised Stellar Coronagraph for Adaptive optics ...

O ptimal transport : T heory and A pplications . ... Names of participants of the OTARIE project are underlined . ... That code was never made public. ... WANN (Weighted Approximate Nearest Neighbors) is a library of C++ classes for weighted nearest neighbor search: given the set P of points p 1 , p 2 , , p N endowed with weights w 1 , w 2 , , w N and a query point q , find p k such that | ... WANN is part of a multipurpose library for numerical transport optimization developed in the OTARIE project. ...

ALBUM: ocean Album: Ocean Artist: Eloy @SONG: Prologue Worlds atomize and oceans evaporate in eternity! Man erects out of the darkness, laughs into the glimmering light and disappears.. ... SONG : Poseidon's Creation When the mighty sons of the spheres beyond distributed the elements of earth they laid down the foundation-stone of highest spiritual birth which ever existed since thousands of years but is lost now in the ... It's our life! ...

... Volodymyr Kuzkov, Sergii Kuzkov, Zoran Sodnik - Direct measurements of laser light aberration from the ARTEMIS geostationary satellite through thin clouds // arXiv.org - New resalts to paper at Conference ICSOS-2014, Kobe, Japan, May 7-9 (2014), S4-4, [view pdf file] . ... Kuz'kov V., Volovyk D., Kuzkov S., Sodnik Z., Pukha S. - Realization of Laser Experiments with ESA'S Geostationary Satellite ARTEMIS. ... Preparation to Optical Communication Experiments With ARTEMIS Satellite. ... V.P. Kuz`kov. ...

... Upper stage Block DM design is based on Block D, which was originally developed under lunar program N1-L3 and the first time it successfully operated in flight was as a part of L1 complex (with Proton launch vehicle) on March 10, 1967. Upper stage Block DM features high reliability proven by more than 30 years of its operational history, and capacity for multiple burns of the main engine, which allows it to perform the required orbital maneuvers. ... Official WEB-site of S.P.Korolev RSC Energia . ...

... Shevchenko Vladislav Vladimirovich . ... Position: Head of Department of Lunar and Planetary Research, Sternberg State Astronomical Institute, Moscow University, Doctor of Physics and Mathematics. ... L. Johnson Space Center - Lunar and Planetary Institute. ... Sternberg State Astronomical Institute, Moscow University, Universitetsky 13, Moscow, 119899 , Russia, . ... V.I.Chikmachev, S.G.Pugacheva and V.V.Shevchenko, Sternberg State Astronomical Institute, Moscow University, Moscow, chik@sai.msu.ru ...

http://hubblesite.org/newscenter/archive/releases/1996/22/text/ Probing the mysterious heart of the Crab Nebula, the tattered remains of a stellar cataclysm witnessed more than 900 years ago, astronomers using NASA's Hubble Space Telescope have found that the Crab is even more dynamic than previously understood, based on a cosmic "movie" assembled from a series of Hubble observations. ... Because of this flickering, the neutron star is also called a "pulsar." ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Listed Since February 17, 1999 . ... 732) 329-0910 . ... 732) 329-9069 . Web Site . ... Web . www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

The perturbation method is based on the small-parameter expansion of an unknown solution of the light scattering problem in a vicinity of the exact solution. ... The only probably exclusion is the case of anisotropic particles for which the rigid solution is either impossible or too complicated. For such problems the perturbation method can give information of the first approximation, which is important for understanding of the basic principles of influences of the material anisotropy. ...

... This paper discuss a polynomial approximation to T for the range of 1620 to 2000 AD published by Jean Meeus and Larry Simons and gives a modified version of this approximation which is much more accurate. ... For this purpose Jean Meeus and Larry Simons published a paper in 2000, which gives a set of polynomial approximation of T for the range of years 1620 to 2000 (Meeus 2000). ... Using these empirical formulae we can calculate the value of T at any instant of the year for the range 1620 to 2000...