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Wake On Demand in Snow Leopard

Putting your Mac to sleep saves power, but it also disrupts using your Mac as a file server, among other purposes. Wake on Demand in Snow Leopard works in conjunction with an Apple base station to continue announcing Bonjour services that the sleeping computer offers.

While the requirements for this feature are complex, eligible users can toggle this feature in the Energy Saver preference pane. It's labeled Wake on Network Access for computers that can be roused either via Wi-Fi or Ethernet; Wake on Ethernet Network Access or Wake on AirPort Network Access for wired- or wireless-only machines, respectively. Uncheck the box to disable this feature.

Submitted by
Doug McLean



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It Really Is a "Series of Tubes"

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No, we're not talking about former Senator Ted Stevens's clumsy description of the Internet; this article from the Stanford School of Medicine Web site instead describes the wildly cool pneumatic tube system used by Stanford Hospital staff to send lab samples around at speeds up to 25 feet (7.6 m) per second - that's roughly 18 miles (30 km) per hour. Pneumatic tube systems were cutting edge communication technology way back in the 19th century, but when it comes to transporting physical objects, they retain their utility even in today's networked age.favicon follow link


Comments about It Really Is a "Series of Tubes"
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Costco has been using this system for years to send cash from the checkout registers to the office.
Adam Engst  An apple icon for a TidBITS Staffer 2010-01-19 12:39
Now that you mention it, I remember that from our days in Seattle (no Costcos anywhere around Ithaca).
Kevin Patfield  2010-01-25 14:06
They can be used for bits also. When I worked in New York City in the mid-70's I remember being told of a pneumatic tube system running between the major bank head offices downtown and midtown branches. It was easy to show that stuffing one of the carriers with floppy disks (they were 8" in those days) and sending them along created a higher bandwidth pipe than any of the available telecommunication links of the day! Using tubes today with BlueRay discs you could manage a burst rate of 10 GB/s or so over a couple of miles.