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not have a double-pole, double-throw switch handy, which is why I ended up with a pair of double-throw, single-pole switches instead. The operation using the two switches is exactly the same but you have to engage both in the same direction to reverse the polarity. The other switch connected to the tray motor is a momentary push button to activate the motor once the direction has been set. Simply set the direction switches to open or close, then press the momentary switch to make the tray drawer open or close. The other switch labeled run activates the noise-making motor, which makes some grinding sounds much like an old dot-matrix printer running. Tell your onlookers that the slug is being cut by some high-tech laser mechanism inside the box. Figure 8-16 shows the completed wiring of the operation switches placed inside a PVC tubing cap. This cap will be held over the slug-loading lid with a bit of Velcro so the slug can be easily removed after the coin has been minted. Notice that the noise-making motor is also hidden inside the PVC cap, and it is positioned so that the included bevel gear can rub directly against the inside of the cap, making a familiar cutting and grinding sound when the run switch is pressed. The two wires that exit the cap will connect directly to the CD-ROM tray loading motor through a small hole in the cabinet.

ischemia and also produce the most profound peripheral changes in the form of muscle strengthening. This would explain why a scienti c study conducted at West Point Military Academy in 1975 revealed that a high-intensity strength-training program performed on Nautilus machines stimulated the body to produce outstanding cardiovascular bene ts (measured by more than sixty different tests to determine aerobic tness) from workouts lasting as little as eighteen minutes. In other words, high-intensity strength training has your aerobic bases covered. It s now been documented that, to produce the most profound changes in cardiovascular endurance, exercise has to be intense and brief (as in the McMaster study). The question that logically arises is: how frequently should one train to allow such adaptive responses to take place in the cardiovascular system The revolutionary study conducted at West Point may be taken as a guiding example of the bene ts of once-a-week training. Arthur Jones, the creator of Nautilus machines and the man who trained many of the cadets in the West Point study, addresses this subject in his essay entitled Maximizing Aerobic Potential : Properly performed, which they seldom are, strength building exercises are not a good way to improve

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cross-enterprise awareness to a discussion of how to build a data warehouse and perform analytics of security at the audit source. Both the notion of needing a data warehouse and the need for security have informed us that we want to move the data out of its source and into a single database, where it can be used for reporting and analysis. With the centralization of important data comes a requirement for increased security for that data. This immediately puts a focus on the security of this audit data warehouse for the following reasons: Although the original user may not have access to the audit data warehouse, someone may still be able to make unauthorized changes to the data. From an auditing perspective, especially when the audits are used for compliance reasons or for possible legal actions, the audit repository itself needs to be hardened. Regardless, in most cases, the desire, if not the requirement, is to have a secure audit system. It does not make sense to send all of the security audits to an unprotected system. This fact, combined with the need to run advanced reporting and analytics, usually rules out any file system based approach, even if the files are stored in XML. All of these reasons have driven conversations on how to secure a database in general. In these specific situations, the databases require greater security because they are acting as a centralized auditing data warehouse.

In this chapter you only saw a single listing that invoked ASP.NET and C# with SQL commands. That was by design to show how you could do so without the aid of Visual Studio 2008. Otherwise, this chapter s focus has been on SQL as a language in its own right. Similar SQL commands can be used with different types of languages and systems. For example, you could use Perl, PHP, or Adobe ColdFusion and the SQL language. Thus, to set off SQL as a language, this chapter saw very little of ASP.NET or C#. In the next chapter, 12, all of this will change. Not only will you see a lot more ASP.NET and C# code with SQL statements embedded in C# strings, you will see Visual Studio 2008 in a much larger role. Most of the SQL you ve learned in this chapter will make more sense in 12 because you can see it actually make changes in a database table.

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