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which appear in the Verdana font in different colors according to their type For example, operators (such as + and ,) appear in black and regular weight, while language keywords appear in bold blue, making them stand out To change a category s font, size, or color, double-click the category, and then work in the Font panel that AppleScript Editor opens Click the Apply button in the Formatting preferences when you want to apply the font formatting; click the Revert button if you find yourself regretting the change And if you want to restore AppleScript Editor s standard fonts and colors, click the Use Defaults button

You can use the accompanying T-SQL script to determine the correlation between index IX_WorkOrder_EndDate and the clustered index. You can modify the script to fit your needs, and test your own indexes for correlation. Here is a short description of what the script does:

Electric Eye The simplest device for detecting an unwanted visitor is an electric eye Narrow beams of IR or visible light are shone across all reasonable points of entry, such as doorways and window openings A photodetector receives energy from each beam If, for any reason, the photodetector stops receiving its assigned beam, an alarm is actuated A person breaking into a property cannot avoid interrupting at least one beam if every possible point of entry has a large enough number of electric eyes spaced at suitable intervals IR Motion Detector A common intrusion alarm device employs an IR motion detector Two or three wide-angle IR pulses are transmitted at regular intervals; these pulses cover most of the room in which the device is installed A receiving transducer picks up the returned IR energy, normally reflected from the walls, floor, ceiling, and furniture The intensity of the received pulses is noted by a microprocessor If anything in the room changes position, there is a change in the intensity of the received energy The microprocessor detects this change and triggers an alarm (Fig 34-3) This type of device consumes very little power in regular operation, so batteries can serve as the power source Radiant Heat Detector Certain devices can detect changes in the indoor environment by directly sensing the IR energy (often called radiant heat) emanating from objects Humans, and all warm-blooded animals, emit IR So does fire A simple IR sensor, in conjunction with a microprocessor, can detect rapid or large increases in the amount of radiant heat in a room The time threshold can be set so that gradual or small changes will not trigger the alarm, while significant changes, such as are caused by a person entering the room, will trigger it The temperature-change threshold can be set so that a small animal will not actuate the alarm, while a full-grown person will This type of device, like the IR motion detector, can operate from batteries The main limitation of radiant-heat detectors is the fact that they can be fooled False alarms are a risk The sun, coming out on an overcast day, might suddenly shine directly on the sensor and trigger the alarm It is also possible that a person clad in a winter jacket, thermal pants, insulated boots, hood, and face mask, entering from a cold outdoor environment, will fail to set off the alarm For this reason, radiant-heat sensors are used more often as fire-alarm actuators than as intrusion detectors.

Retrieves the distribution statistics of the clustered index (one row per value range). Determines the number of pages in the table, and uses that to estimate the number of pages per value range. Retrieves the distribution statistics of the nonclustered index (one row per value range). Determines the minimum and maximum clustered index key per nonclustered value range (a time-consuming step). Interpolates the number of consecutive clustered index pages per nonclustered value range, based on the minimum and maximum clustered index key within the range.

If you want to change several categories at once, select them by clicking the first category and then z-clicking each of the others You can also select a range of categories by clicking the first and then SHIFT-clicking the last Then double-click anywhere in the selection to open the Fonts panel This trick is useful when you want to change the font family or size of several different categories at once for example, when you grow tired of the Verdana font