java barcode api free Safety with Your Robot in Software

Generation EAN-13 in Software Safety with Your Robot

at the opposite cable end. As a team, the two technicians can test the other bers in the cable. 7.422 The optical TDR is an important and valuable piece of equipment and every system with any optical cable should have at least one. The typical price range for these devices is $6,000 to $16,000, depending on options. These instruments have large LCD screens displaying a loss pro le of the ber being tested. Cable systems often use cables carrying many bers, where the various bers can branch to other parts of the system at splice locations. Optical cable should be tested before it is installed as well as after it is installed and before activation. The optical TDR can be used to establish the length of cable on a reel by measuring a ber. The end point can be seen and identi ed, and any anomalies along the ber can be seen on the display. Some cable operators do not measure every ber, but most systems will measure at least one in each buffer tube for large ber-count cables. Optical cable can be either loose-tube or tight buffered-tube construction. Some cable systems choose loose-tube cable for aerial plant and tight buffered-tube cable for underground or where it is pulled through a conduit. Figure 7-16 shows how some faults are displayed on an optical TDR. Because testing of bers is performed before and after installation, the test data has to be stored or led for future reference. The TEK Ranger optical TDR has a keyboard option with which cable reel number, cable number, buffer tube identi er (usually a color), and the plastic coating color of the ber can be entered, followed by the loss measurement. This instrument can store a large number of screen measurements that can be loaded to a computer for storage and or analysis. An optional disk drive is available as well as an RS 232 Port. Data can be stored and analyzed by Windows-supported software. Most optical TDR instruments are battery powered and built for troubleshooting in the eld. 7.423 Other types of optical test equipment must have a high-level source of optical power that operates in the visible spectrum. Before connecting any optical cables to headend equipment, the cable can be tested by placing a light source to one end of a cable. Any bends in the optical cable that are too tight or too sharp will leak light and can be easily spotted visually. Many systems are concerned that optical cable will be cut, dug up, or damaged and repairs will have to be made. Single-mode optical ber is spliced using a fusion-splicing device that encapsulates the splices in sealed PVC enclosures. More and more systems are electing to

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Although Property Bars and toolbars offer information about the size and position of an object (to three decimal places), something about using rulers bounding a page has tangible and easy to understand qualities. Additionally, CorelDRAW Rulers are a resource for pulling nonprinting guidelines; traditional layout artists only wish that non-repro blue pencil marks were as nondistracting as these digital equivalents! Later in this chapter, guides and guidelines are covered; now let s look at how rulers are configured, manipulated, and how they invaluably assist in your design work.

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as is commonly done for simulating damping due to impact (Hunt and Crossley, 1975; Herbert and McWhannell, 1977). The dissipated power, or the rate at which a linear viscous damper of the form in Eq. 11.60 dissipates energy, is Pviscous = Fd = bd 2 . (11.64)

Remember, strings in C are terminated by a null, which is a false value. Therefore, a statement such as

other catch clauses are bypassed). When an exception is caught, the exception variable exOb will receive its value. Actually, specifying exOb is optional. If the exception handler does not need access to the exception object (as is often the case), then there is no need to specify exOb. For this reason, many of the examples in this chapter will not specify exOb. Here is an important point: If no exception is thrown, then a try block ends normally, and all of its catch clauses are bypassed. Execution resumes with the first statement following the last catch. Thus, a catch is executed only if an exception is thrown.

All these commands were discussed in 17. If you don t specify the method of authentication, local authentication is used with the username commands. If you don t define a group policy, the default group policy called DfltGrpPolicy on the ASA is used; you can create specific policies on the appliance, or specify an AAA server to find them (authorization-server-group command).