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Newly Spotted Comet May Shine Among Brightest In History

KenSeymour Re:How can I see this? (100 comments)

Check this site every few months until late 2013. They are great for new and charts.

more than 2 years ago

Gooseberry Launches Android-based Raspberry Pi Rival

KenSeymour Re:Amazing demand for little ARM PCs (170 comments)

Mine is waiting for me at home. When I get home I'll find out how good it is or if I wasted my $35.
I got my order in in April so I waited 4 months. Now I hear you can order more than one.

more than 2 years ago

Ask Slashdot: Advice On Child-Friendly Microscopes?

KenSeymour My 2 cents (118 comments)

I bought one of these for my niece:


I was very impressed with the quality. I would also recommend a prepared slide kit and
a slide making kit.

more than 2 years ago

Ask Slashdot: Best Option For Printing Digital Photos?

KenSeymour Re:Ink Jet == Bad (350 comments)

I've got an Epson Stylus Photo R800. Using their ink and paper, a print is supposed to last 100 years. But I researched it first and it is mostly because of the pigmented inks. I framed and hung up some 8x10s from it. Many ink jet printers use not particularly lightfast ink and will start shifting in a year or so.

Color prints and negatives from film will fade in 25 years or less. Cibachrome prints were meant to be archival. B/W prints and negatives last at least 75 years,

more than 2 years ago

Electronics Prototyping Plate Kit Board For Raspberry Pi Coming Soon

KenSeymour Re:It would be nice.. (74 comments)

I ordered one from element 14 / Newark here in the US. Judging from the forum, production is ramping up and I wanted to get in line because interest is also
ramping up.

It was back ordered, of course, but I should have a delivery date in a week or two.

It was cheap enough, I could risk waiting until September if that's how long it takes to get to the front of the line.

more than 2 years ago

House Kills SOPA

KenSeymour SOPA = HR 3261 (495 comments)

At the library of Congress:


more than 2 years ago

The Second Moons of Earth

KenSeymour Re:Temporarily captured? (92 comments)

From my college physics:

Two bodies = stable elliptical orbits
more bodies -> ejection possible if they get too close.

The planets we have are the ones that are left. They don't cross paths much.
Asteroids, comets, Oort-cloud objects can be ejected from the solar system.

more than 2 years ago

30 Years of the BBC Micro

KenSeymour Re:A9 load immediate (208 comments)

I used hand assembled machine code on my Apple ][ Plus until a magazine published an in place assembler in Basic for the Commodore.
I typed it in, modified the addresses, and stored it to cassette tape. I then implemented "life" cellular automata and went door to door until someone hired me.
At that job, I met Lance Leventhal, author of my 6502 Assembly Language Programming. I still have the book.

If I wanted to go back, I would burn a soft-core 6502 into an FPGA and run code on it. I had more time to do those things
when I was 17.

about 3 years ago

NRO Declassifies KH-9 Satellite

KenSeymour Re:pictures (74 comments)

I found this link showing photos from the lowest resolution camera on the bottom half of the page.
They only had access to further reduced resolution images.


more than 3 years ago

Team Sonia Takes Prize at RoboSub 2011

KenSeymour 1st place entry uses Java on Linux (22 comments)

I was trying to think of how they debug the embedded code on this thing. Probably using a data logger.

I found this paper interesting about the software running on the sub:


more than 3 years ago

Congressmen Pushing To Reopen Yucca Mountain

KenSeymour Re:It needs to be reopened, and spent fuel moved i (212 comments)

How does the fuel get to the plant today? What makes the waste heavier than the fuel?

IIRC the fuel gets there by truck. If so, they can take the dry casks out by truck if there is somewhere for the trucks to go.

more than 3 years ago

25% of US Hackers Are FBI/CIA Informers

KenSeymour Lamo's thinking (185 comments)

You left out the possibility that Lamo decided his choices where 1) keep listening to manning and his classified leak plans and not tell anybody and hope his name
never gets discovered by the Feds or 2) alert the Feds and greatly lower you chances of going to prison for being an accessory for someone else's activity.

What if Manning had been the informant? If that turns out to be the case, 2 would be the better choice.

more than 3 years ago

Google Abandons Plan To Archive World's Newspapers

KenSeymour Re:Libraries (60 comments)

Newsprint turns yellow fairly quickly. A physical newspaper is not designed to last. So making an image on Microfilm and/or digital archive is what's important.

Before I looked it up, I thought Ben Franklin had started public libraries in the US. That is partly true. He started one public and one private (subscription) library.
Both still exist. Andrew Carnegie started many other public libraries.

So US public libraries have received both public and private funding. Google could choose to continue the tradition in this way. If they make it a foundation, it
could live on after Google is gone. If they keep it in "the cloud", who knows?

more than 2 years ago

Google Abandons Plan To Archive World's Newspapers

KenSeymour Re:Short-sighted... (60 comments)

Newspaper articles about the 1969 Moon Landing is (was?) on microfilm in different libraries around the world -- unless every single one of them tossed it all out.

Then there is the Library of Congress.

Ironically, if newspapers from the past are not conveniently available online, it increases the value of microfilm or digital media that each local or university library keeps. That makes them less likely to be tossed out.

In the near future, can people wait for authors and researchers to visit libraries, use a machine to review the material, combine their own analysis info
a book or article in a monthly magazine? Will people read either if they aren't available on their version of eBook reader or tablet?

more than 2 years ago

Chain Reactions Reignited At Fukushima

KenSeymour Re:Without a moderator? (234 comments)

I posted incorrect information. As you say, the BWR reactors at Fukushima only have two kinds of rods, fuel rods and control rods.

TFA indicates that there is evidence that Unit 2 did not cease its normal chain reaction.

I remember them dumping seawater from helicopters at one point. That water was not boronated.

more than 3 years ago

Chain Reactions Reignited At Fukushima

KenSeymour Re:Without a moderator? (234 comments)

These reactors have fuel rods, moderator rods, and control rods. A sub-critical reactor still generates heat.
Subtract the cooling water, melt some fuel and moderator, the geometry changes, then who knows.
I can't find what material is in the moderator rods, probably graphite.

more than 3 years ago

Vatican To Digitize Prohibited Archives

KenSeymour Freudian Slip . . . (121 comments)

is when you mean one thing and you say your mother.

more than 3 years ago

Former Truck Driver Reconstructs A-bomb

KenSeymour Sure its easy . . . (332 comments)

Just be careful you don't end up like this guy.

more than 3 years ago

Radioactive Water Found In Two Reactor Buildings

KenSeymour Re:plutonium was just found outside (442 comments)

I found a more interesting aspect of the link you posted is:

The intent of the MOX fuel program is to irradiate the so called "weapons-grade" plutonium, converting it to "reactor-grade", which will make the plutonium no longer suitable for use in advanced nuclear weapons. There would be no reprocessing or subsequent reuse of the MOX spent fuel. The fuel would be disposed of in a waste repository along with other high-level nuclear waste.

This is the fuel that is in Fukushima #3. When the fuel rods are fresh, they have weapons grade plutonium in them. After being irradiated, they become high-level nuclear waste.

My own fear of plutonium comes from the scenario of a spec of Pu-241, with a 14.4 half-life, gets in your lungs it delivers essentially all its alpha particles to your body during your lifespan. Let's hope there are no more fires at the plant.

more than 3 years ago


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