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Why US Gov't Retirement Involves a Hole in the Ground Near Pittsburgh

leighklotz Raiders of the Lost Ark (142 comments)

Probably looks like this.

about 8 months ago
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Juno Needs Radio Amateurs!

leighklotz Other QRSS modulation projects (82 comments)

This modulation scheme is called QRSS and can also be used to send very low power (milliwatt and microwatt) signals around the world ionospherically, and on bands such as VLF (very low frequency). Here the open source from a couple of projects by Hans Summers from a book I edited for the ARRL on the Arduino: http://hamradioprojects.com/authors/g0upl/+qrss-attiny/ http://hamradioprojects.com/authors/g0upl/+mm-shield/ and plenty of links about QRSS from there.

about a year ago
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After a User Dies, Apple Warns Against Counterfeit Chargers

leighklotz Re:Smart move (457 comments)

Voltage? Not 5V? I took a quick look through the USB Power Delivery docs and didn't see that.
Wikipedia doesn't mention it either, though it does discuss the raising of the pre-negotiation current limit from 0.5A to 1.5A, and the max negotiated limit at 5A, which would be 25W.

http://en.wikipedia.org/wiki/USB#Power

Do you have any links on the higher voltages?

You probably already understand, but many do not, that you cannot push or provide current at 5V that the device doesn't want. If your device will draw only 500mA due to its internal design, attaching it to a 2A or 5A port won't do anything.

about a year ago
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A Glimpse of a Truly Elastic Cloud

leighklotz Re:Symbolics, Lisp Machines, RMS, GNU EMACS (201 comments)

Carl Hewitt's "Actor" model, which is the basis for Erlang, was first implemented on multi-server systems on Symbolics Lisp Machines at the MIT-AI lab. The CADR machines could not be produced fast enough to dedicate enough to the project but when commercial ones were available Carl got a grant and bought 6 of them and they called it the Apiary. They didn't use it all the time so i thought of it mostly as a source of free machines, and we are now only just getting to the point where the multi-CPU network based shared nothing architecture begins to be a mainstream approach.

about a year and a half ago
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Adobe and Apple Didn't Unit Test For "Forward Date" Bugs. Do You?

leighklotz Careful setting dates (169 comments)

In late 1999, we tested a product by rolling the date forward to 2000-01-01 and it worked fine. Then we rolled the date back to the normal date, and files that got touched during the test period caused trouble, because their modification date was "IN THE FUTURE!?!?!?" as one piece of code put it. The most broken was the timestamp data for a time-based UID generator, which flat out refused to run, saying that it was in danger of generating collisions.

about 2 years ago
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Google Engineers Open Source Book Scanner Design

leighklotz Re:The Internet Archive already has a good design (69 comments)

See archive.org...

Yes, that's in the original submission, as you see above. For the record, Brewster Kahle (who founded Archive.org), Jeff and Danny (who did this project), and I are all MIT alums, and the "Internet Archive scanning robot" is from a company called Kirtas, which also has ties to Xerox.

about 2 years ago
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Google Engineers Open Source Book Scanner Design

leighklotz Re:The missing link (69 comments)

Yes, it was in my submission but apparently edited for brevity. TL;DW?

about 2 years ago
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Google Engineers Open Source Book Scanner Design

leighklotz Re:Having looked at the design... (69 comments)

In point of fact, for individual scanning, the video even mentions that this linear scanner is SLOWER than a manual scanner such as the diybookscanner. The gains come in that since its automatic, a single person could keep 8 or 10 of them running at at time.

Yup. Progress in clock speeds has pretty much slowed down, and Google appears to expect future performance enhancements to come in the form of parallelism

about 2 years ago
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D&D Monster Study Proves Eyes Have It

leighklotz Cultural Bias (196 comments)

I'm sure this study is testing cultural bias, not human propensity. In Japan, for example, it's considered rude and direct to look into someone's eyes, and many people look at the mouth, or even slightly away.

about 2 years ago
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Court Rules Website Terms of Service Agreement Completely Invalid

leighklotz Email theft (148 comments)

Email lists are regularly stolen from ecommerce and info sites, as anybody who owns their own domain for email and can give out single-use email addresses knows. I report it every time it happens, and I've only gotten a positive response once, from Walgreen's Photo. Everybody else either fails to answer or points me to their privacy policy (as if that somehow prevented them from having data stolen). My suspicion is that there is a back-door or two in popular mailing-list software that ecommerce sites use; it can't be *that* many corrupt insiders stealing and selling email addresses to have actual human inside involvement.

about 2 years ago
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UK's 'Unallocated' IPv4 Block Actually In Use, Not For Sale

leighklotz Re:Enlighten me please (203 comments)

How many bits for a IPv6 IP vs a IPv4 IP?

Yes of course they should of thought about this before designing the hardware with a maximum ability to comprehend a ipv4 IP...

I remember having this discussion with people close to the principles about the NCP to TCP/IP transition when the 32-bit (four octet) address size was picked.
The sound bite was that it's bigger than the biggest European phone number, so they planned ahead for a time when there would be as many computers as phones, which seemed way enough. (Remember, NCP had a hosts.txt file that listed all the hosts.)

For DNS, they designed an hierarchical system, but events overtook the hierarchy and people got fetishistic about names, leading to most names being in ".com" and being public-facing. The original theory was that the hierarchy would be more important, with more hosts in organizations and so on.

But on the IP side, the segmentation with subnetting (and later, classless subnetting) made things more complicated, so it became possible to run out of IP addresses even though there were still plenty available, but fragmented. Along the way with all the subnetting routing got more complicated and there were a few routing table crises that required new algorithms and lots of new designs, and that pretty much works miraculously now, but doesn't solve the walled-off inaccessible IP address problems.

If you can figure out a way to transparently change who firewalled-off Class A subnet over to a non-routable private net and then release the class A net, you could reset the clock back to the problem IPv4 thought it was solving and become a zillionaire in the process.

more than 2 years ago
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Ask Slashdot: What To Do With Found Calculators?

leighklotz Re:Give them away (302 comments)

nobody gets it anymore...you have to say hadoop cluster now.

more than 2 years ago
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FCC Asked To Reassess Cell Phone Radiation Guidelines

leighklotz Re:Why bother? (78 comments)

Or you could use Skype, not pay minutes to t-mobile for using your own wifi, and not have to hang up when you leave the house.

more than 2 years ago
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MIT Lecturer Defends His Standing As Email Inventor

leighklotz Re:Uh, 1980? (249 comments)

We called it "mail" and "netmail."

more than 2 years ago
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MIT Lecturer Defends His Standing As Email Inventor

leighklotz Uh, 1980? (249 comments)

When I got to MIT in 1979 email had been in use for a long time. Both " at " and "@" were in equal use on ITS to send mail over ARPAnet via NCP. I'm not sure what this guy is claiming about having invented email in 1980.

more than 2 years ago

Submissions

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Google open non-destructive book scanner; books and libraries rejoice

leighklotz leighklotz writes  |  about 2 years ago

leighklotz writes "Google released open hardware designs for a book scanner that "sucks" pages to turn them, using a vacuum cleaner. The Google Tech Talk Video starts with Jeff Breidenbach of the Google Books team, and moves on to Dany Qumsiyeh showing how simple his design is to build. Could it be that the Google Books team has had enough of destroying the library in order to save it? Or maybe the just want to up-stage the Internet Archive's Scanning Robot.

Disclaimer: I worked with Jeff when we were at Xerox (where he did the awesome hack Gnu Chess on your Scanner), but this is more awesome because it saves books."

Link to Original Source
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NASA launches rocket to collect data on aurora

leighklotz leighklotz writes  |  more than 2 years ago

leighklotz writes "NASA launched MICA, a rocket with an ion-field probe and a magnetic-field probe, from Fairbanks Alaska, straight up into a roaring aurora display, and then like Gravity's Rainbow, back down again. No word on whether they encountered Mrs. Coulter. CNN Video shows more surprisingly cogent popular press coverage. One of my sempai from college worked on this project, and shared pretty the pretty pix, some of which are in the University of New Hampshire news release, and in Astronomy Magazine. They should be analyzing the data for a while."
Link to Original Source
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T-Mobile announces Android G2, sort of

leighklotz leighklotz writes  |  more than 4 years ago

leighklotz (192300) writes "T-Mobile users got an SMS this morning saying You heard it first: G2 is coming, and its [sic] fast. Finally, the best of Google at the speeds you crave. Get exclusive access at http://g2.t-mobile.com/

The mentioned site is "under construction," but if it this is for real (and other news says it may be), it would be great new. Dear God, I hope it has a keyboard."
Link to Original Source

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2.4 GHz to Venus

leighklotz leighklotz writes  |  more than 5 years ago

leighklotz writes "Make Magazine Blog reports:

On March 25th, 2009...the ground station at the Bochum observatory transmitted [2.4 GHz] radio signals to Venus. After traveling almost 100 million kilometers, and a round trip delay of about 5 minutes, they were clearly received as echoes from the surface of Venus.

Apparently this is a preliminary test to make sure the team can successfully communicate with a homenbrew spacecraft bound for Mars:

This represented a crucial test for a final key component of the planned P5-A Mars mission. By receiving echoes from Venus, the ground and command station for the Mars probe has been cleared for operational use and the AMSAT team is now gearing up for building the P5-A space probe.

"

Link to Original Source
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NASA Mars news: not life, but perchlorate

leighklotz leighklotz writes  |  more than 6 years ago

leighklotz writes "In an update to the little green men story of not-life-on-Mars, NASA has twittered

The buzz this weekend was due to an interesting soil chemistry finding, still preliminary, but now avail here:

Here being namely: NASA Spacecraft Analyzing Martian Soil Data. Here's the exciting bit:

Within the last month, two samples have been analyzed by the Wet Chemistry Lab of the spacecraft's Microscopy, Electrochemistry, and Conductivity Analyzer, or MECA, suggesting one of the soil constituents may be perchlorate, a highly oxidizing substance.

and further promising

NASA will hold a media teleconference on Tuesday, Aug. 5, at 2 p.m. EDT, to discuss these recent science activities.

"

Link to Original Source
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Japanese amateur satellite sends back earth photos

leighklotz leighklotz writes  |  more than 6 years ago

leighklotz writes "Mineo Wakita reports that the Japanese amateur satellite CUTE-1.7 +APD II, has sent back its first photo.

The ground control station at the Tokyo Institute of Technology has downloaded the first color image taken by the CUTE-1.7 +APD II Amateur Radio satellite. The satellite was 620 km above the Earth at 28.905 degrees North and 146.040 degrees East when the image was captured. CUTE-1.7 +APD II was one of several CubeSats carried to orbit this year in April by an Indian PSLV-C9 rocket launched from the Satish Dhawan Space Center.
"

Link to Original Source
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Dell pulls support for x64 Vista?

leighklotz leighklotz writes  |  more than 7 years ago

leighklotz writes "This message is getting forwarded about with some concern by those who have to validate software on multiple platforms...it looks like Windows is beginning to see the fragmentation that Linux is so often accused of.

A user named "Morpheus Phreak" wrote on neowin:

I do a fresh install of Windows Vista Ultimate x64 Edition. The install finishes and my system reboots with in-box drivers for almost all of my hardware. The first thing I do is go to the Dell Support site and download drivers, or do I? It seems that Dell has decided to stop supporting all 64-bit editions of Windows, thus nothing to download.

I make a post on their forums asking if anyone knows if it's temporary and I receive this response from a Dell employee:

"It cost us in time and money to validate drivers. We built PCs with specific operating systems in mind. That is all we will support."


I mention to the Dell employee that he must be mistaken as that would violate their Vista Logo contract with Microsoft. At this point the Dell employee replied tersely with the following:

"Be assured, our legal team is on top of this decision."


At this point I'm stumped and a bit angry. After all the OEM Logo requirements state, "OEMs using x64 implementations must have signed drivers available to end users if shipping a 32-bit version of Windows Vista on the system."

By removing their x64 driver support they have now violated their contract with Microsoft. Any x64-based systems they sell now with the logo are illegal. One can only help but wonder, why would Dell put themselves in this position?

I'll kindly step down from my Soapbox now, but I ask one question to all of you.

Where do we go from here?
"

Link to Original Source
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HP-35s calculator announced and withdrawn

leighklotz leighklotz writes  |  more than 7 years ago

leighklotz writes "HP announced their 35th anniversary version of the groundbreaking HP-35 calculator on July 11th, and the New York Times featured [reg warning] it in their Circuits section today. Sadly, today was also the day that HP apparently withdrew the product to correct reported manufacturing defects. For calculator geeks, note that it has a big prominent ENTER button and reportedly features good tactile feedback. No news about the recall on HP's website..."
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leighklotz leighklotz writes  |  more than 7 years ago

leighklotz writes "According to SpaceWeather.com:

NASA has just released the first batch of 3-dimensional sun photos taken by the STEREO spacecraft. [the first image] reveals three dark holes in the sun's atmosphere: The "holes" are coronal holes, places where the sun's magnetic field opens up and allows solar wind to escape. Earth is inside a solar wind stream flowing from one of these coronal holes today. 3D imagery allows scientists to peer inside coronal holes and divine their structure, possibly leading to better space weather forecasts.
They also have more images, but note that you need to make or buy 3D glasses to get the full effect."
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leighklotz leighklotz writes  |  more than 7 years ago

leighklotz writes "SpaceRef.com reports that Charles Simonyi, the former Xerox PARC researcher (and later Microsoft developer) whose work gave us WYSIWIG and Microsoft Word, is starting an initiative to keep kids interested in life, the universe, and everything...or at least space science.

Charles Simonyi, Ph.D., the fifth private space traveler, will speak with high school students in three events across the United States through the Amateur Radio on the International Space Station (ARISS) program. ... Dr. Simonyi's site, www.charlesinspace.com, was created to further develop his three space mission objectives: to advance civilian spaceflight, assist in space station research and involve the world's youth in the science of space travel. Visitors to this interactive publishing site have an opportunity to read Dr. Simonyi's in-depth blogs, ask questions directly to Dr. Simonyi, see his personal pictures, watch training video and access other space-related links.
Sadly, his site has a bad Flash infestation."
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leighklotz leighklotz writes  |  more than 7 years ago

leighklotz writes "ARRL Reports:
End of an Era: FCC to Drop Morse Testing for All Amateur License Classes
... In an historic move, the FCC has acted to drop the Morse code requirement for all Amateur Radio license classes. The Commission today adopted, but hasn't yet released, the long-awaited Report and Order (R&O) in WT Docket 05-235, the "Morse code" proceeding...the FCC only issued a public notice at or about the close of business today and not the actual Report & Order, so some details — including the effective dates of the two orders — remain uncertain. Currently, Amateur Radio applicants for General and higher class licenses have to pass a 5 WPM Morse code test to operate on HF. Today's R&O will eliminate that requirement all around.
The US joins Canada and other countries in eliminating the morse code testing requirement, after being authorized to do so on July 5, 2003, when the World Radio Telecommunications Conference 2003 in Geneva adopted changes to the ITU Radio Regulations."
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leighklotz leighklotz writes  |  more than 8 years ago

leighklotz writes "SOLAR-B, the first in a series of three satellites designed to study the Sun's corona in 3D, launched last week. According to a Timesonline (UK) report:
Solar B, built by teams from Britain, America and Japan... Its three instruments will try to find out what happens on the sun's surface just before solar flares erupt. One of them, a telescope built by a team from University College London (UCL), will watch the sun's atmosphere for signs suggesting the surface is building up to an explosion....Next month two more probes, the so-called Stereo mission, should follow Solar B into space...It also means the spacecraft will be able to generate high-quality three-dimensional "movies" of solar flares. If these are good enough they could be turned into Imax-style films and put on general release.
"
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leighklotz leighklotz writes  |  more than 8 years ago

leighklotz writes "The ARRL that reports
Anousheh Ansari is a "Go" as First Female Civilian Space Traveler (Aug 25, 2006) — It's official! Iranian-American businesswoman Anousheh Ansari, 39, will travel to the International Space Station next month as part of the Russian Soyuz TMA-9 "taxi mission," Space Adventures Ltd announced today. Ansari, an eleventh-hour stand-in for Daisuke "Dice-K" Enomoto as the fourth civilian to fly to the ISS, would be the first female civilian "spaceflight participant." Enomoto was removed from the Soyuz flight roster for medical reasons.
Ansari's family founded the X-Prize and Enomoto was formerly an executive with livedoor, the Japanese internet concern."
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leighklotz leighklotz writes  |  more than 8 years ago

leighklotz writes "The ARRL reports:
American businesswoman Anoushe Ansari may be the eleventh-hour stand-in for Daisuke "Dice-K" Enomoto, 34, as the next civilian to fly to the International Space Station. Ansari, who would be the first female civilian space adventurer, has indicated she's ready and eager to make the trip..."During a recent evaluation it was determined that Mr. Enomoto has a medical condition that will exclude him from participating as a crew member of Soyuz TMA-9," Space Adventures said in a news release...Ansari was the winner of the 2000 National Entrepreneurial Excellent Award sponsored by Working Woman magazine. Her family made a major contribution to the X Prize — now known as the Ansari X Prize — which offered a $10 million prize for the first successful private reusable space vehicle.
"
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leighklotz leighklotz writes  |  more than 8 years ago

leighklotz writes "Cosmic Log reports on SpaceCam 1, an experiment aboard the ISS that sends webcam images to earth:
An innovative space transmission system built by volunteers has started sending down pictures from the international space station to the whole wide world...The equipment and the software was sent to the station last September on a Progress cargo craft, and since then the space station astronauts have been working off and on to get the system running. On July 30, they sent the first still image ...
Here are the images sent so far."

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