... It is assumed that you have available a calculator which can derive sines and cosines, and also has functions sin -1 and cos -1 which given sinA or cosA can find the angle A, in the range 0 to 180 degrees. A triangle ABC has a right angle C and two sharp angles A and B. The triangle's sides AC and BC on both sides of the right angle C are given as: . ... a) When a beam of light hits the surface of a flat piece of glass, it is generally bent by some angle. ... AP cos? = x sin? + y cos a . ...

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• Trigonometry beyond 90 degrees
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... The main research task of the LRS was an investigation of interstellar medium of our Galaxy using its line emission in radio domain with the help of the gratest RATAN-600 Radio Telescope. ... The complex investigation of the Interstellar Clouds structure on the different scales and with the different radio lines for understanding of structure, dynamics and evolution of interstar gas and its interaction with other galactic constituents and the conditions for star formation. ...

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• The conference " Multi-Wavelength investigations of the Sun and modern problems
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Next: Initial conditions Up: Old neutron star distribution Previous: Introduction . The problem to be solved is to find stationary space distribution of stars which have had certain initial space and velocity distributions and move in a given potential. ... In principle, the most straightforward way to obtain the solution is to integrate directly the equations of motion for a sufficiently large number of stars with different initial conditions. ... Then space density is given by . ...

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• Home Page of Ulyanovsk International School - Seminar

. filename : Cross-device link . The file you are trying to make a link to is located on a different physical device. The solution is to create a symbolic link . directory_name is a directory . You are trying to make a link to a directory. Check the pathname for the file. ln: filename : File exists . A file with the same name as the linkname already exists in the destination directory. Use a different name for the linkname.

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Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

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Next: Equations of condition Up: Extinction and transformation Previous: Extinction and transformation . Bias can also be introduced by improper fitting procedures. For example, the reduction program known as SNOPY, used for many years at La Silla and also at La Palma, uses a simple iterative technique in which some subsets of the parameters are solved for, while others are held fixed; then the ones last solved for are held fixed, while the ones previously fixed are redetermined. ...

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• Sky problems
• Cosmology Tutorial - Part 3
• Computational Methods

... AMPLE (Adaptable Minor Planet Ephemerides) is integrated software package to deal with a number of problems concerning minor planets with the aid of IBM-type personal computer. ... compiling a list of all numbered minor planets which can be seen at certain moment within specified sky region and visualization of their mutual positions; . ... As AMPLE is able to reproduce virtually any table of "the Ephemerides of Minor Planets" , it may be considered as computer version of the EMP. ...

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... Copy a test proposal . ... Write a proposal from scratch in the new RPS2 format . ... Appendix: ProCon Disclaimers ProCon can not fix problems that existed in the original RPSS file. ... Abstract This is a step by step procedure for demonstrating the new RPS2 system. ... ProCon uses Full Transformation to decide which exposures in the RPSS file belong together in visits. ... You will get warnings and a non-commented line at the top of your output which you must remove before you can use the RPS2...

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... Dr. Ravil Nazirov is the head of the workshop, and Andrew Ananjev is the secretary of the workshop. ... The workshop is used to be held in the last decade of the month, preferably on Tuesdays. ... The next session will take place October 29, 1996 . ... There is "CONPAS" mailing list which you can join to discuss issues of problem solving and to be automatically notified of important dates and decisions with respect to the coming sessions. ... Secretary of the Workshop: Andrew Ananjev . ...

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... The Australian National University] [Department of Physics] [Paul Francis] [Main Roleplay Page] . These exercises are my attempt to adapt the technique of Problem Based Learning to the context of introductory astronomy and astrophysics classes. ... As students grapple with the puzzle, they are forced to learn the subject matter of the course. ... This exercise is designed for 1st year University students with a reasonable high-school background in Maths and Physics. ...

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... Please note the following problems and workarounds: . ... Arrow keys . Arrow keys are used in SAOtng to move the mouse or markers. ... Unfortunately, error messages are generated if both sets are defined in the SAOtng code but are not supported by X. To get around this problem, we have added the -kbprefix command switch (and the SAOTNG_KBPREFIX environment variable) to SAOtng. This switch allows you to specify which arrow keys you want to use (assuming your version of X supports both). ...

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The engineer for claro phone company contacted AO on 06may14 reporting a problem that they were having with 5 cell phone tower sites in Utuado. The problem started around 21apr14. ... The problem was with the uplink bands: . 835-845 Mhz . ... The 810 to 1100 Mhz band covered the Claro uplink bands. ... You can see the daily usage of the cell phone towers. high during the day, low at night . ... the total power vs time for the two bands also look unchanged pre 21apr14 pos 12apr14 . ...

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Subject of Geodesy. ... The Main Problems of Geodesy. ... The Main Parameters of the Terrestrial Ellipsoid, Ratios between Them. ... The Main Equations of Geodesic Line. ... Geodesic Station Coordinates Calculation on the Ellipsoid Surface. Primal and Inverse Geodesical Problems, Methods of Their Solution. ... Geodesical Coordinats Determination by Gauss-Kruger Coordinates. ... Methods of Synchronous Observations and Orbital Methods of Artificial Satellite Use for Coordinates Determination. ...

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Chapter 3 Section 3.5.2 . Section 6.1.5 . Section 6.2.2 . Chapter 7 Section 7.3 .

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... The goal of this course is to teach some basic methodologies for analysing problems of control of partial differential equations. ... When dealing with controllability problems, one has to distinguish between finite-dimensional systems modelled by ordinary differential equations and infinite-dimensional distributed systems described by means of partial differential equations. Most of this course deal with problems related with partial differential equations. ...

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Next: Ionospheric Corrections in AIPS++ . ... Previous: AIRY: Astronomical Image Restoration in interferometrY . ... Calculate residual images for all facets (using 2-D transforms). Partially deconvolve individual facets and update the image model for each facet. ... The image in Figure 1 was made using the AIPS++ widefield algorithm with 225 facets. ... In calculating the residual image the residual visibility re-projection for the different facets can be estimated independently. ...

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The problem of turbulence is one of the most important and challenging problem of the modern science. ... An experimental investigation of turbulent flows with special experimental setup and equipment, which allow to obtain reliable data with good precision, is very difficult and expensive process. ... The natural assumption for the theory of turbulence is that there exist some (unknown yet) general and universal properties for wide range of different turbulent flows. ...

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... Epistemology is a part of the study of Philosophy dealing with how we use our senses to know something about the world. ... Yet we know that we can be deceived by our senses. ... If we cannot always trust our senses, how can we ever know anything for certain about the world? ... A branch of epistemology that has come into vogue in the last 10-15 years is the problem of consciousness. ... What relationship is there between our conscious experience and the true nature of the physical world? ...

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The efficiency of interaction of radiation with a particle and hence its optical properties depend on the particle chemical composition, size, shape, structure, etc. ... Particle size expressed in units of the wavelength of incident radiation, together with chemical composition, most strongly affects the optical properties of a scatterer. ... There are many methods to solve the light-scattering problem for a homogeneous spheroid (our survey of the light-scattering methods see here ). ...

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... Different sections of an image may have different exposure. ... The obvious remedy for this is to divide the input image by the exposure map before smoothing. ... If you wish to create a background map in counts per pixel from an XMM exposure in which the exposure time varies significantly between CCDs, then you will need to remultiply the the output image by the exposure map; if however you wish to create a mosaic from several different cameras or pointings, you may wish not to do so. ...

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• Errors