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Dish A dish antenna must be correctly shaped and precisely aligned The most efficient shape, especially at the shortest wavelengths, is a paraboloidal reflector However, a spherical reflector, having

4 Add the with prompt parameter and the text of the prompt, as shown in boldface here:

This is another combination that should be included in the tests. Just as with a single dependent attribute, you ll have to test the key attribute (which will be dependent on the combination in case of a mutual dependency, in which case the combination is an alternate key) and the other dependent attributes (which will be dependent on the combination in case of a transitive dependency). In the case of my sample Orders table, Table 10 Testing functional dependencies for I only have two dependent attributes left the combination of CustomerID and OrderTotal (CustomerID and OrderTotal), so there s OrderNo CustomerID OrderTotal only one combination to test. And the only other attribute is OrderID, the key. 7001 12 125.00 So I create the test population of table 10 7002 12 125.00 to check for a possible alternate key. The domain expert saw no reason to reject this example (after I populated the related tables with data that observes all rules discovered so far), so there s obviously no dependency from CustomerID and OrderTotal to OrderNo.

set userFile to choose file of type "publictext" with prompt "Choose the text file you want to open:"

Because the Orders table used in my example has no independent columns anymore, I can obviously skip this combination. But if there still were two or more independent columns left, then I d have to test each combination for a possible dependency of a candidate key or any other independent attribute upon this combination.

conventional feed (A) and Cassegrain feed (B)

Routine maintenance on a database server is much more difficult than the equivalent maintenance on a middle-tier server (such as a web or application server) With a middle-tier server that is behind a load balancer, you can remove the server from the pool, allow it time to drain its pending requests, and then do whatever is required, whether it be applying Windows updates, updating the BIOS or firmware, or updating the application It is easy to do rolling maintenance in the middle tier Database mirroring makes rolling maintenance almost as easy for the data tier Let s imagine that you need to apply a critical Windows update on your database servers in production You have tested this update in a development/QA environment to make sure that it does not cause issues for SQL Server or your application(s), and you have confirmed that the update requires a reboot of the server.

shown in boldface here:

If you had a standalone database server with no high availability solution in place, you would be looking at about five to ten minutes of downtime for all of the applications that use that server (because that is about the average time it takes most commodity level servers to completely reboot and then restart SQL Server) The downtime varies based on your hardware and environment, and could be much longer That one standalone database server restart would use up all your downtime for the entire year if you are trying to achieve five nines availability, which is 99999 percent With a SQL Server Failover Cluster, you would be looking at about 60 90 seconds of downtime for each node as you moved an instance from one node to another to perform a rolling upgrade.

the shape of a section of a sphere, can also work well The feed system consists of a coaxial line or waveguide from the receiver and/or transmitter, and a horn or helical driven element at the focal point of the reflector Conventional dish feed is shown in Fig 27-11A Cassegrain dish feed is shown in Fig 27-11B The larger the diameter of the reflector in wavelengths, the greater the gain, the f/b ratio, and the f/s ratio, and the narrower the main lobe A dish antenna must be at least several wavelengths in diameter for proper operation The reflecting element can be sheet metal, a screen, or a wire mesh If a screen or mesh is used, the spacing between the wires must be a small fraction of a wavelength