For non-spherical isotropic particles, the classic variant of the RDG approximation does not include the anisotropy of the shape and hence does not give the correct Rayleigh limit, say, for small ellipsoids. ... We call this variant a modified RDG approximation (MRDG). ... First, the MRDG leads to the correct Rayleigh limit. ... The second approach to generalization of the RDG is connected with the use of the Born iterations for the scattering integral equation [ 95 , 124 , 132 , 264 ]. ...

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• Hybrid and simple analytical approximations
• WKB and eikonal approximations (high energy - HEA)
• Rayleigh and Rayleigh-Gans-Stevenson approximations

... It would obviously be desirable to make a quantitative comparison of the antenna performance and surface errors. ... Any errors will reduce the antenna gain, and in fact we are not certain that at the highest frequencies we have achieved the optimum performance possible, limited only by the surface errors. ... Epsilon is the normal rms surface error and lambda is the wavelength. ... Rss surface errors derived from 305m antenna measurements using astronomical sources. freq . ... rms (cm) . ...

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• Example of the Scale of the Cost Risk to NAIC
• Simulations of 3 ALFA Surveys
• Approximating calvalues over wide bandwidths

... Operations of the Hubble Space Telescope (HST) require the creation of stable and e#cient observation schedules in an environment where inputs to the plan can change daily. A process and architecture is presented which supports the creation of e#cient and stable plans by dividing scheduling into long term and short term components. ... The short term scheduler builds e#cient week long observation schedules by selecting observations which have plan windows open within the week. ...

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• VLT First Light
• Design and Status of the NICMOS Cryocooler
• Preface

... Siding Spring Observatory by day - Tim WetherтАж . Siding Spring Observatory 2.3 m (looking up aтАж . ... Title: Siding Spring Observatory 2.3 m (looking up at the secondary mirror) . Description: NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ... Siding Spring Observatory 2.3 m (looking up at the secondary mirror) NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ...

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• Gemini Near-Infrared Integral-Field Spectrograph (NIFS) Overview.
• Gemini NIFS August 2004 Update.
• Gemini NIFS April 2001 Update.

... Here three cylindrical structures are clearly shown: the outer cylinder is the delay line pipe, next is the cylinder of the trolley itself, and innermost is the black carbon fibre tube of the cat's eye. ... Figure 1: Cut-away view of a 3-D representation of the trolley inside the delay line pipe The trolley comprises two major components: the cat's eye assembly and the carriage assembly. ... These structures have support points for flexural pivots which attach to the cat's eye to the trolley chassis...

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• http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/uploads/MROIDelayLine.DesignDocumentation/trolley_mech_design.pdf
• http://www.mrao.cam.ac.uk/projects/OAS/publications/fulltext/Fisher_SPIE_7734-156.pdf
• http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/uploads/MROIFastTipTilt.InterfaceControl/Draft%20Minutes%20of%20informal%20FTT-NAS%20TIM.pdf

... Space flight . ... Zero Gravity . ... Weightlessness lasts for 25 seconds and can be recreated up to 15 times within one flight. ... The ATLAS Aerospace is using the flying laboratories for carrying out technological tests and studies of different space-related systems, devices, assemblies, biomedical studies of organisms and their behavior under weightless conditions and in reduced weightlessness ("Lunar", "Martian" other types of gravity), and also for commercial flights and advertising projects. ...

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The Astronomy Net . Articles | AstroGuide | ... Forums . ... H ere you can find resouces to help understand perhaps the grandest of all sciences. ... Upcoming Sky Events . ... This site includes lists of manufacturers, vendors, software, etc. organized in the AstroGuide to help when you are looking to purchase your tools. ... Astronomy Articles . ... Are you interested in writing an article for the Astronomy Net? ... www.astronomy.net . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Secondary Offset - an Astronomy Net Eyepieces Forum Message
• Celestron CGE 1100 XLT Secondary Mirror Housing Repair - an Astronomy Net
• Celestron Secondary Mirror Housing - an Astronomy Net Celestron Forum Message

... 8, ``Celestial Mechanics'', 2002 Superosculating intermediate orbits and their applications to study the perturbed motion V. A. Shefer Research Institute of Applied Mathematics and Mechanics, Tomsk State University, Tomsk, Russia A method of construction of intermediate orbits for approximating the real mo­ tion of celestial bodies in the initial part of trajectory is described. ... Shefer V. A. Superosculating Intermediate Orbits for the Approximation of Perturbed Motion. Second--Order Tangency. ...

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• Keywords_347
• (Untitled)

... Одномерные диофантовы приближения. ... Теорема Гурвица. ... Многомерные диофантовы приближения. ... Граница Минковского для систем линейных форм. ... Плохо приближаемые числа и системы линейных форм. Теоремы существования. ... Наилучшие приближения. ... Сингулярные теоремы Хинчина. ... Игра Шмидта и плохо приближаемые числа и системы линейных форм. ... Теорема Хинчина о плохо приближаемых системах аффинных форм и ее аналог для игр Шмидта. ... Метрическая теорема Хинчина и ее обобщения. ...

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• Diophantine approximation (Spring 2010)
• Moscow Mathematical Society - Secondary School Section - News
• Moscow Mathematical Society - Secondary School Section - General information

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Measured radial velocities for the primary (full symbols) and secondary (empty symbols), phased with the orbital period of 5.9051102 0.0000023 days. ... HD 98088 is a synchronised, double-lined spectroscopic binary system with a magnetic Ap primary component and an Am secondary component. ... The magnetic field in the primary is predominantly dipolar, with the positive pole oriented approximately towards the secondary. ...

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• Tours and Visits by Members of the Public
• International Problem
• Education and Public Outreach

... Telescope concept . ... The Submillimetron Project is dedicated to astronomical studies at the submillimeter and far infrared wavelengths using a cryogenic telescope located on the Russian segment of the International Space Station (ISS). The Astro Space Center of the Lebedev Institute of the Russian Academy of Sciences is responsible for developing the Submillimetron Project. ... Currently, the Astro Space Center is carrying out a pre-Project study under contract with the Russian Space Agency. ...

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Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...

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eDucation . ... Primary Schools . Post Primary . ... The Post Primary School educational programme is designed to be both fun and rewarding for students. The Key Stage 3 curriculum is especially rich in links to astronomy and space.€а There are dozens of opportunities to link the PlanetariumтАЩs work to the curriculum.€а We have designed some thought-provoking workshops which will retain their power long after the Planetarium visit is over.€а . ... тАв Northern Ireland Curriculum - Science . ...

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• Curiosity on Mars: How did NASA do it? | Astronotes
• JWST: Profile of a Master Telescope | Astronotes
• NASA's New Orion Spacecraft to Fly in 2014 | Astronotes

... On peut multiplier ou diviser le haut et le bas ("num?rateur et d?nominateur") d'une fraction a/b par un m?me nombre c : . ... Ce r?sultat est possible parce que (c / c) = 1 , pour toute valeur de c (except? naturellement z?ro : "Thou Shalt not Divide by Zero" ( "Tu ne dois pas diviser par z?ro" ) et que multiplier n'importe quel nombre par 1 ne change pas sa valeur. la r?gle de multiplication des fractions est de multiplier le haut avec le haut, le bas avec le bas ; nous obtenons donc : . ...

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• Microwave radiometers
• MARSES Homepage | Project Information
• Identities

... Space Research Institute (IKI),Moscow, Russia. ... Moscow hotels: . Our assembly of recommended Moscow hotels. Extended list of Moscow hotels www.hotelmos.ru . Moscow Hotels at Discounted Rates: www.hotels-moscow.ru . ... On the free afternoon of Wednesday Dec. 22nd a TOUR OF KREMLIN (including 3 churches inside Kremlin) and a TOUR OF "Oruzheinaya Palata" (The Armoury Chamber - most famous museum in Kremlin) will be arranged. ... High Energy Astrophysics Department at IKI , 2004. ...

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• RTT150 Optical Systems
• RTT150 Technical Description
• The 6th INTEGRAL Workshop "The Obscured Universe"

. Photos . This is an old homepage of Sergey Koposov with some old photos. My current homepage is here . The first version of that page was created approximately in november 2002. Sergey Koposov , 2002-2015 . Last change: 30.12.15.

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• Y.Kupryakov, SAI, MSU
• Труды Варфоломеева М.И.

... Samara region . SSAU History . ... Today, on the 1th of July, took place the opening of Russia-wide students construction project on the space-launch complex Vostochniy . ... SSAU students participated in today's celebratory assembly, where Deputy Prime Minister Dmitry Rogozin and Head of Roscosmos Oleg Ostapenko addressed the construction brigade students. Rector of SSAU Yevgeniy Shakhmatov also took part at the opening ceremony of the student construction project on Vostochniy". ...

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... title='Philips Мультиварка Philips - Philips - Philips' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> . Цвет: черный . ... Платье Tommy Hilfiger. ... English for Business Life" is written by experts in international business communication who understand how fast-moving changes are affecting the language and skills that people need to be effective in the workplace. ... Железная дорога Голубая стрелa, 103Х95см. ... Платье Button Blue . ...

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• Животное игрушечное Alex Кольцо янтарь поцелуй солнца
• Катушка Grinda - Grinda - Grinda PowerTrains & Constructions Игровой набор
• Набор Powertrains Power Construction Небоскреб, паркинг, ж/д станция 8+ 72175

... Sergey Ayukov's home page . ... build me a castle . ... build me a city . ... Check out our new powerful indexing system for local ftp server or try the same interface for SAI ftp server. ... FileJuggler -- indexing/browsing/search system for ftp servers. ... Rock lyrics - my old own collection; not very big. Mirror of lyrics archive from cs.uwp.edu - the biggest lyrics archive in the world. ... Sergey Ayukov ( asv@sai.msu.su , asv@ayukov.com , PGP key ) . ...

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• Continuous wavelet transforms
• Album: Suzdal Wooden construction museum
• Image: Modern construction; as far as I remember it symbolizes unification of

... Meade Instruments Corporation . ... Microscope Instruction Manual . Meade Model 9200 . ... In any microscope, the objective lens magnifies the illuminated specimen on the microscope Stage, and then is further magnified by the microscope's eyepiece. ... In the case of the Meade Model 9200, use the 4X Objective Lens (6) by rotating the Objective Lens Turret (9) so that the 4X Objective Lens is aiming at the center of the Stage (when it is in the proper position it will click into place). ...

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• Meade Instruments Corporation - Meade Model 9400 Microscope Instruction Manual
• Meade Zero Image Shift-Electronic Micro-Focuser
• Meade Zero Image Shift-Electronic Micro-Focuser - Photography Accessories -