BEGIN:VCALENDAR PRODID;X-RICAL-TZSOURCE=TZINFO:-//Calagator//EN CALSCALE:GREGORIAN X-WR-CALNAME:Calagator METHOD:PUBLISH VERSION:2.0 BEGIN:VTIMEZONE TZID;X-RICAL-TZSOURCE=TZINFO:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20150308T020000 RDATE:20150308T020000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 TZNAME:PDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT CREATED;VALUE=DATE-TIME:20150317T032632Z DTEND;TZID=America/Los_Angeles;VALUE=DATE-TIME:20150418T120000 DTSTART;TZID=America/Los_Angeles;VALUE=DATE-TIME:20150418T103000 DTSTAMP;VALUE=DATE-TIME:20150317T032632Z LAST-MODIFIED;VALUE=DATE-TIME:20150317T032632Z UID:http://calagator.org/events/1250468066 DESCRIPTION:EAST Knowledge invites you to attend our fifth meeting! *All* are welcome! \;\n \;\n* **What:** Locating Intrusions Using Fiber Optics \;\n* **Who:** Jim Rulla \;\n* **Where:** The Story Room a t the Gresham Library \;\n* **When:** 10:30am-Noon\, Saturday\, April 18\, 2015 \;\n* **Why:** Sharing what we know \;\n \;\nInterfe rometers measure distances to within fractions of the wavelength of ligh t. Put a couple of these incredibly sensitive devices on the fence arou nd an airport\, and you can not merely detect a would-be intruder — you can locate him. Put a pair on a pipeline\, and you can not merely detec t nearby digging that could damage the pipe — you can locate its source. You might even be able to detect — and perhaps even locate — leaks in the pipe. \;\n \;\nThe detection and location mechanisms are fasci nating examples of clever engineering. I'll explain how these patented systems work and illustrate new algorithms that improve performance. \;\n \;\n* [Wikipedia page on interferometers](https://en.wikipedia.o rg/wiki/Interferometry) \n\nTags: gresham\, east\, enthusiast\, fiber op tics\, math\n\nImported from: http://calagator.org/events/1250468066 URL:http://eastknow.org SUMMARY:EAST Knowledge - Locating Intrusions Using Fiber Optics LOCATION:Gresham Library Story Room: 385 NW Miller Ave\, Gresham OR 97030 US SEQUENCE:3 END:VEVENT END:VCALENDAR