... Future seminars . P a s t seminars . ... Kinematic magnetic dynamo in a random flow with strong average shear " . V.V. Lebedev (Landau Institute for Theoretical Physics RAS) . ... We analyze the kinematic dynamo in a conducting fluid where the stationary shear flow is accompanied by relatively weak random velocity fluctuations. ... The growth rates of the magnetic field moments are related to the statistical characteristics of the flow describing the divergence of Lagrangian trajectories. ...

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... Figure 3 shows several tails resulting from trap 2-637. ... The solid line shows a simple exponential decay, as described in our idealized model. It appears that the behavior of the bright traps has been relatively constant with time, and the simple exponential decay provides a fairly good fit to the data. ... What about the dark tails seen just above some of the traps? ... For example, the dark tail decay rate for trap 2-337 is only about 3% while the bright tail decay rate is 19%. ...

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• STIS Instrument Handbook
• Interstellar gas, dust and diffuse bands in the SMC
• NICMOS Data Handbook

... Impedance . Electrical impedance, or simply impedance, describes a measure of opposition to a sinusoidal alternating current (AC). Electrical impedance extends the concept of resistance to AC circuits, describing not only the relative amplitudes of the voltage and current, but also the relative phases. ... Resistance is the real part of impedance; a device with a purely resistive impedance exhibits no phase shift between the voltage and current. ...

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• CCDs for Material Scientists

Next: Introduction Up: Detectors Previous: Detectors . ... Section describes the ideas behind the relative calibration of 2--dimensional photometric CCD--images. Section gives a description of the steps required to perform a relative calibration of the CCD and discusses the various MIDAS commands that are available to perform the required operations. ... In order to proceed to calibrate the images in terms of magnitudes requires further steps not detailed here. ... Removing Irrelevant Columns . ...

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• Input Data and Preprocessing
• Spectra of 300 sources
• Initialisation of the Keywords

... To derive the motion of a penny dropped inside an airliner moving at 600 miles/hr (about 1000 km/hr)--should we calculate it with respect to the interior of the airliner, or with respect to the ground? ... And if a similar penny is let go inside an orbiting spaceship--should its motion be calculated relative to the interior of the spaceship, or relative to the Earth outside? ... Each such choice is known as a frame of reference . Some possible frames are -- the interior of the airliner, . ...

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• Global change [Oulu]
• Frictional heating [Oulu]

... 8, ``Celestial Mechanics'', 2002 Precision increase for the theory of relative motion of a satellite's pair K. V. Kholshevnikov Astronomical Institute of St.Petersburg State University, and Institute of Applied Astronomy, St.Petersburg, Russia Modern higher--precise theories of motion of special Artificial Earth Satelґ lites (geodetical, navigational) consider all forces which one may describe with at least 30% precision, including so exotical ...

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• http://www.ipa.nw.ru/conference/2002/sovet/PS/BELETSKY.PS
• http://www.ipa.nw.ru/conference/2002/sovet/PS/LOPEZ.PS

The Southern African Large Telescope (SALT) was a relatively cheap (~$20M) 10m class telescope, for which the construction phase was completed, relatively quickly, by late 2005. ... These cover a range of topics, and some will focus on studies using the unique or rarer instrument capabilities for large telescopes. Finally, I look to the future of SALT and the prospects of new instruments and capabilities and I will also discuss some of other new SAAO facilities and future plans. ...

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• http://www.mso.anu.edu.au/seminars/abstracts/20151023-1400.html

This group of four pages describes how the Arecibo 430 MHz radar makes simple measurements in the ionosphere. ... Radar Reflections From the Ionosphere . ... Or How are radio and TV stations like radars?) ... Consider two radio stations located on a mountain transmitting to a nearby city. ... A radar is like a radio station, but it has a receiver that picks up radio waves reflected from objects (targets). ... Although a radio station transmits continously, a radar can transmit short bursts of waves. ...

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The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the following articles and reports, which are available online . Mills, D.L. Internet time synchronization: the Network Time Protocol. ... Mills, D.L. Network Time Protocol (Version 3) specification, implementation and analysis. ...

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• APOD: September 27, 1998 - Albert Einstein Describes Space and Time
• APOD: 2000 January 8 - Albert Einstein Describes Space and Time
• Scratchbuilt CHU Receiver

Geometric Algebra 2 Quantum Theory Chris Doran Astrophysics Group Cavendish Laboratory Cambridge, UK Spin Ї Stern-Gerlach tells us that electron wavefunction contains two terms Ї Describe state in terms of a spinor S N Ї A 2-state system or qubit MIT2 2003 2 Pauli Matrices Ї Operators acting on a spinor must obey angular momentum relations Ї Get spin operators Ї These form a Clifford algebra Ї A matrix representation of the geometric algebra of 3D space ...

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• Determination of the relative orientation between radio and dynamical reference
• OptInt PmWiki : PmWiki / Pm Wiki Philosophy
• OptInt PmWiki : Delay Line Software Libraries | History

Next: NGC 253 Up: Galaxies with Broad HI Previous: Galaxies with Broad HI . This section describes a group of relatively nearby spiral galaxies showing a variety of activities. ... Since such a broad H I absorption line was detected in NGC 1808 (see below) I wanted to know its origin and the relation to the surrounding medium in the galaxy. ... Starbursts are thought to be the result of gas accretion toward the central regions of galaxies. ... NGC 253 . NGC 660 . NGC 1068 . NGC 1365 . ...

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• How to reduce filterbank data
• How to reduce correlator data to archives.
• How to reduce S2 timing data

Each Apache configuration directive is described using a common format that looks like this: . ... This indicates the format of the directive as it would appear in a configuration file. This syntax is extremely directive-specific, and is described in detail in the directive's definition. ... If the directive has a default value ( i.e. , if you omit it from your configuration entirely, the Apache Web server will behave as though you set it to a particular value), it is described here. ...

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• Definitions of terms used to describe Apache modules
• Apache module mod_auth_digest
• Apache module mod_expires

... The described procedure returns the one-dimensional response distribution in PI channels, based on an input energy. The redistribution function of the MOS cameras comprises a main peak (roughly centred on the input photon energy); a lower-energy secondary peak, whose relative magnitude is inversely correlated with the photon energy, and a noise term which extends down to the detection threshold energy. Details of the current calculation are given in the CCF release note, CAL-SRN-272. ...

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• Description
• Relative Corrections

... Most of this gas is hydrogen, some is helium, but there is a trace amount of relatively heavy molecules, including carbon monoxide (CO) - a component of smog. ... Kepler Discovers How Planets Move . ... Kepler was an assistant to the most accurate astronomical observer of the time, Tycho Brahe. Kepler was able to use Brahe's data.. A Sky Full Of Hydrogen . ... Interstellar space is filled with extremely tenuous clouds of gas which are mostly Hydrogen. ... Help NASA Classify Martian Craters . ...

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Modules | ... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 . ... This document describes the terms that are used to describe each Apache module . ... This indicates how tightly bound into the Apache Web server the module is; in other words, you may need to recompile the server in order to gain access to the module and its functionality. ... Modules which are not included with the base Apache distribution ("third-party modules") may use the "External" status. ...

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• Terms Used to Describe Directives - Apache HTTP Server
• The Arcetri Spectral Code - E.Landi and M.Landini (2002)
• The Arcetri Spectral Code - E.Landi and M.Landini (1998)

function drat, line1 , line2 , edens , DEM , logT , fx1 = fx1 , fx2 = fx2 , _ extra =e ;+ ;function drat ; return the ratio of fluxes in one line relative to another line ; for a variety of densities ; ;syntax ; frat=drat( line1 , line2 , edens , DEM , logT , fx1 = fx1 , fx2 = ...

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• Center-Filled SNRs
• Quick Look Tools
• Astro Jargon

... One of the instruments, the Troughton equatorial telescope, is maintained at constant temperature and relative humidity, to reduce the rate of deterioration. ... 3.1 Troughton Equatorial Telescope . Figure 1 shows the equatorial telescope constructed by J E Troughton of London and which was erected in the west dome of Armagh Observatory in 1795. ... Troughton, J. E.: c.1790, Instructions for Adjusting the Troughton Equatorial Telescope, Armagh Observatory Archives , M17.2, 3pp. ...

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• William Herschel
• Abstract
• The /etc directory

The black hole. ... The black holes are generated in the result of a collapse of giant stars with the mass more than three Sun's masses. ... And moreover the gas near the neutron star or the black hole will get hot and will become a source of high energetic electromagnetic radiation in X-rays and gamma range. ... In the majority of double systems, being the sources of X-rays radiation, the invisible component mass does not exceed the two solar masses, so it is a neutron star. ...

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... The most precisely determined characteristic for accreting neutron stars (NS's) is their period. ... Period changes show fluctuations. ... Some applications of stochastic processes in astrophysics especially in accreting systems were discussed in Lipunov (1987),Hoshino Takeshima (1993) and Lipunov (1992).In Hoshino Takeshima (1993) the authors, using simple models of MHD turbulence, try to explain aperiodic changes in X-ray luminosity of X-ray pulsars. ... Here, -constant angular momentum. ...

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• The Environment of the Rotator