Headends and Signal Processing in Software

Generation PDF 417 in Software Headends and Signal Processing

adjusting the Freehand Smoothness. Do this by changing property Width settings or by choosing a different stroke or arrowhead style. Experimenting is fine, but if you turned the Freehand smoothing down to 0 while painting with the Artistic Media Tool, the result might be a stroke that has more nodes than you d like, making it hard to create a smooth arc or straight line. If this happens (or at any time), you can choose the Shape Tool, click the stroke to reveal its nodes, and then marquee-select all the nodes. Then use the Reduce Nodes spin box on the Property Bar to remove non-essential nodes along the path that is driving the Artistic Media stroke.

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There are three versions of Ethernet OAM, all of which can be very useful in conjunction with any Ethernet-over-xyz technology, not just Ethernet bridging. IEEE Std 802.3ah-2004 defines an Ethernet OAM capability for a single point-to-point physical IEEE 802.3 link. It provides for keep-alive pings at one-second intervals; a remotely

Click the icon for where you want to save the macro you ll record, and write project notes for yourself and others.

Authentication devices are also subject to interactive and offline attacks, although they are far less likely to succeed. An interactive attack would attempt to generate a legitimate authenticator value. The attack s likelihood of success depends on the size of the authenticator. Since authenticators tend to have at least six digits, the chances of success could be less than one in a million. Moreover, the interactive attempts can be detected by the system receiving them, and the system can then sound the alarm. Offline attacks against tokens are more likely to succeed since they cannot be detected. The goal of the attack is to derive the base secret stored in the token or smart card. The offline attack begins by collecting a number of authenticators (and challenges, too, if they re available, as they are for systems using classic Microsoft Windows domain login protocols). The attack tries all plausible values for the base secret and tests them against the intercepted authenticators to determine whether a particular base secret value would generate that authenticator. These attacks may be practical against tokens that use DES or other algorithms with similarly short key lengths.

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Piping audio to a room in your home is one thing. However, it s more than likely you ll want to be able to turn it up or down. In order to make those changes, you ll want to install an impedance-matching volume control. These devices (like the one shown in Figure 13-3) are installed in the wall and control the volume from the speaker and present a constant load to the audio amplifier.

To change the order to descending, simply specify the descending option, as shown here: