26 Jul 2010

top secret

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via twidroid
26 Jul 2010

in flight WiFi is cool

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via twidroid
25 Jul 2010

dinner is cooking

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via twidroid
17 May 2010

Building an oak telescope


Sent to you via Google Reader

Building an oak telescope


You might not think about the finish of your homemade telescope but if it’s build from solid oak you probably should. [Gregory Strike] built this 8″ telescope a few years back but just posted about it a few days ago. The optics are quite expensive but the rest of the build was done dirt cheap and he did a great job of it.That includes taking care to finish the oak boards that make up the octagonal body of the instrument.


This is much more approachable for the average hacker than something like the 22″ binocular build (or going way too far and building your own observatory). [Gregory] developed his design after looking at a couple of others. If you need a bit of a push to get started check out the telescope resource we ran across in our days of Internet infancy.

Sent from my iPad

28 Aug 2009

No Legislation without Participation

via What's Best Next by Matt on 8/28/09

Patrick Lencioni has a great article over at The Simple Wisdom Project on the problems that come from the fact that members of congress often do not have to live with the consequences of the laws they pass. Universal health care is the latest example.

Here’s a great quote:

As it stands today, Congress is considering legislation that would substantially change the way health care in America is paid for and delivered. And regardless of how one feels about that, one thing is certain: members of Congress won’t have to participate in it. The bill expressly states that they are exempt, and as we know, they have a much better, richer plan.

Regardless of whether you’re a man or a woman, a liberal or a conservative, a teenager or a senior citizen, this just doesn’t make any sense. It gives one the impression that politicians are masters of the people rather than public servants, and that they see themselves as being more important than the people they are supposed to represent. Otherwise, why would they choose to exempt themselves but not firefighters or teachers or police officers or doctors?

Related posts:

12 Aug 2009

Five Freedoms We’d Lose Under Obama’s Health Care Plan

12 Aug 2009

The Lost Art of Reading

via Between Two Worlds by JT on 8/12/09

David Ulin, book editor at the LA Times, has an important article that articulates something I have been feeling recently, namely the slow erosion of "the ability to still my mind long enough to inhabit someone else's world, and to let that someone else inhabit mine." He writes:
Reading is an act of contemplation, perhaps the only act in which we allow ourselves to merge with the consciousness of another human being. We possess the books we read, animating the waiting stillness of their language, but they possess us also, filling us with thoughts and observations, asking us to make them part of ourselves. This is what Conroy was hinting at in his account of adolescence, the way books enlarge us by giving direct access to experiences not our own. In order for this to work, however, we need a certain type of silence, an ability to filter out the noise.

Such a state is increasingly elusive in our over-networked culture, in which every rumor and mundanity is blogged and tweeted. Today, it seems it is not contemplation we seek but an odd sort of distraction masquerading as being in the know. Why? Because of the illusion that illumination is based on speed, that it is more important to react than to think, that we live in a culture in which something is attached to every bit of time.

. . . What I'm struggling with is the encroachment of the buzz, the sense that there is something out there that merits my attention, when in fact it's mostly just a series of disconnected riffs and fragments that add up to the anxiety of the age. [bold emphasis mine]

Are others out there experiencing something similar? If so, what are you doing to swim against the information stream?

HT: First Thoughts

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6 Aug 2009

Captain Steve Answers Your Airline Questions

via Freakonomics by By Stephen J. Dubner on 8/6/09

A while back, we began soliciting reader questions for Captain Steve</strong, a captain with a major U.S. airline. He answered his first batch of questions, and now is back with his second round. Please leave new questions for Captain Steve in the comments section below.

6 Aug 2009

Feds At DefCon Alarmed After RFIDs Scanned

via Slashdot by CmdrTaco on 8/6/09

FourthAge writes "Federal agents at the Defcon 17 conference were shocked to discover that they had been caught in the sights of an RFID reader connected to a web camera. The reader sniffed data from RFID-enabled ID cards and other documents carried by attendees in pockets and backpacks. The 'security enhancing' RFID chips are now found in passports, official documents and ID cards. 'For $30 to $50, the common, average person can put [a portable RFID-reading kit] together,' said security expert Brian Marcus, one of the people behind the RFID webcam project. 'This is why we're so adamant about making people aware this is very dangerous.'"

Read more of this story at Slashdot.

5 Aug 2009

What would you do with 20mm accuracy GPS?


On Tuesday night I did a talk at LUV on Geek My Ride (see the post on Practical Arduino for more information if that takes your fancy) but probably the most interesting thing about the night was catching up with Hamish Taylor again and hearing about his crazy-accurate GPS project over at the Dept of Sustainability and Environment.

I hadn't even heard of this project but it's already well underway with coverage to 1m accuracy across the entire state, and coverage to +/-20mm accuracy across a significant part of that including the entire Melbourne metro area and well beyond.

What they've done is install a bunch of base stations at extremely accurately known positions, each of which reads the location being fed to it via the regular GPS network and figures out how much that varies from its actual known position. It that "publishes" that correction data to make it available to compatible GPS receivers in the area, which then apply the same offset to the position they get from the regular GPS network to correct for local inaccuracies. The result is being able to track your position down to +/-20mm!

Very, very cool stuff.

Of course this is the same technology that's been available on things like self-driving tractors for years, where a local fixed reference point feeds correctional data to the tractor's autopilot to let it drive around a field all by itself with amazing accuracy. But it's previously been deployed as a point-solution, not just blanketed across the entire state in a frenzy of inspired brilliance.

This is the sort of technology that can change so many different things that it's hard to know what to begin with. Self-driving trucks etc is the obvious one, but think about what happens when this tech shrinks from its current $1,500 price tag to being something that's just a part of every phone. Then think beyond that: if GPS with 20mm accuracy could be produced at a low enough cost (I'm talking a few dollars here, a long way from the current reality!) it could be put into pretty much anything that you don't want to lose. Having something located to within 5 or 10 meters like with regular GPS is all fine and well, but it's really only to the point of telling you what room something is in, not whether it's on the left hand side of the third shelf in the kitchen, pushed to the back.

So I want ideas, people! What would you do with cheap, ubiquitous positioning technology with +/-20mm accuracy? Let me know!

There's more information on the DSE's "GPSnet" project at www.land.vic.gov.au/gpsnet

Jeff McFadden's Space

Husband, father, codesmith.