* Posts by harmjschoonhoven

529 posts • joined 3 Sep 2012

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KILO-MACH SONIC BOOM probed in fireball embers of 1572AD SUPERNOVA

harmjschoonhoven
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Stop

not so fast

The cited Mach number refers to the shock velocity over the velocity of sound in a shirt-sleeve atmosphere and has nothing to do with the sound- or Alfven- velocity in the hot collisionless magnetoplasma of Tycho's SNR

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How the W3C met its Waterloo at the Do Not Track vote showdown

harmjschoonhoven
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Coat

Re: Any server / browser?

http://validator.w3.org/#validate_by_uri finds errors and flags warnings in a large fraction of webpages. Browsers have now 'learned' to handle almost all of them gracefully. Most errors have nothing to do with targeting specific browsers, but are the result of sloppy programming.

Even many homepages of HTML code generators like quackit.com contain errors (in this case 197 Errors, 89 warnings).

Mine is the one with valid-html40.png in the pocket.

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Ricoh Theta 360˚ camera: Point and click immersive imaging

harmjschoonhoven
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FAIL

Re: 3584 x 1792 pixels

The full-res picture of the Ricoh Theta is 3584 pixels wide. 20/20 human vision has a acuity of 1 arcminute, 21600 "pixel" pairs in 360°.

BTW a poor man's way to take a 360° picture is photographing a Xmas ball. It works quite well in fact.

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Classic telly FX tech: How the Tardis flew before the CGI era

harmjschoonhoven
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Re: one-inch C Format tape

The main advantage of the C-machines over the BCN-recorders which we used before - and after - that was that the C-Format allowed single frame recording.

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Your kids' chances of becoming programmers? ZERO

harmjschoonhoven
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Re: Mmmh, punch cards

Therefore I used to draw diagonal lines with a marker pen over the deck of cards. In fact I still do this with unbound piles of paper.

Turn the sheets upside down, make all edges visible by repeated bending, put waste paper underneat, draw two oblique lines with a pencil.

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harmjschoonhoven
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Happy

Re: Mmmh, punch cards

Therefore I used to draw diagonal lines with a marker pen over the deck of cards. In fact I still do this with unbound piles of paper.

Turn the sheets upside down, make all edges visible by repeated bending, put waste paper underneat, draw two oblique lines with a pencil.

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Can't stand the heat? Harden up if you want COLD, DELICIOUS BEER

harmjschoonhoven
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Boffin

Explanation of the Mpemba effect

There is an alternative explanation for the Mpemba effect.

The thermal conductivity of water ice is two orders of magnitude smaller than that of a typical metal. So if the hot sample is capable of melting a frost layer on the cooling surface of even a few hundred microns (which is almost always there) and the cold sample remains isolated by a frost layer, the result may be the Mpemba effect.

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Switzerland to set up 'Swiss cloud' free of NSA, GCHQ snooping (it hopes)

harmjschoonhoven
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Stop

Re: land of cuckoo clocks and fine chocolate

Switzerland is accommodating 924 million tourists a year (2008, estimated) and the earnings from the export of the chemical and pharmaceutical industry is over 3½ times that of watches.

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Have you reinstalled Windows yet? No, I just want to PRINT THIS DAMN PAGE

harmjschoonhoven
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Thumb Up

Re: obOfficeSpace

http://www.reuters.com/news/pictures/slideshow?articleId=USRTXY6QK#a=1

Fishery administration officers use axes and hammers to destroy confiscated electric fishing equipment on the banks of Hanjiang River in Wuhan, Hubei province, China April 1, 2013 by lack of printers. ©REUTERS/Stringer

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Cisco: We'll open-source our H.264 video code AND foot licensing bill

harmjschoonhoven
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WTF?

H.265

In the mean time the hot issue in the broadcast world is HEVC a.k.a. ITU-T H.265

or MPEG-H Part 2 (ISO/IEC 23008-2). See: http://www.theregister.co.uk/2013/04/11/feature_wtf_is_h265_hevc/

and/or google "H.265-HEVC-Overview.pdf".

This codec will supersede H.264 in a few years time, just like H.264 superseded MPEG-2.

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Toshiba brings out terabyte laptop drive (yes), miracle enterprise-grade TLC

harmjschoonhoven
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600,000

Toshiba(*) specifies "MTTF of 600,000 Hours" for their MQ01ABD100 (1000G in 69.85x100.0x9.5 mm) and "Reliability: Load/Unload 600,000 times" for their new MQ02ABF100 (1000G in 69.85x100.0x7.0 mm).

Spot the difference.

(*) pronounced with the stress on the second syllable.

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A steam punk VDU ?

harmjschoonhoven
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Happy

Re: Machina Cryptologica

For an illustation of the device go to

http://diglib.hab.de/drucke/218-25-quod-1/start.htm?image=00425

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harmjschoonhoven
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Angel

Machina Cryptologica

Ah, a steampunk VDU. That is the Machina Cryptologica of Athanasius Kircher S.J., described in his book Magnes, sive arte magnetica (The Magnet or the Magnetic Art), Cologne 1643.

See "Athanasius Kircher, The Last Man Who Knew Everything" by Paula Findlen (ed.), Figure 11.1.

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Can you trust 'NSA-proof' TrueCrypt? Cough up some dough and find out

harmjschoonhoven
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Black Helicopters

Dependencies

Building TrueCrypt from the tarball TrueCrypt_7.1a_Source.tar.gz comes with several requirements inter alia:

RSA Security Inc. PKCS #11 Cryptographic Token Interface (Cryptoki) 2.20 header files (available at ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-11/v2-20).

An audit should take this into account. BTW FTP is blocked by my firewall by default.

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Google: Now your mom will try to sell you toilet paper

harmjschoonhoven
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WTF?

Re: you might see an ad for a nearby restaurant along with your friend's favorable review

If one or more of my friends-in-the-Google-sense has had a meeting with Staphylococcus aureus in that nice restaurant around the corner, this new "service" of Google would only give me the +1s ....

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New Terminator-style 'bots can self-assemble, leap, climb and SWARM

harmjschoonhoven
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Happy

Robots vs. Humans

The talking heads in http://www.youtube.com/watch?v=6aZbJS6LZbs (1108797 views) are not lipsync.

The M-Block robots in http://www.youtube.com/watch?v=mOqjFa4RskA (76731 views) are, well, just cubes.

So the (fascinating) image and sound are OK.

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TWELFTH-CENTURY TARDIS turns up in Ethiopia

harmjschoonhoven
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RE: 106 BBC programmes have been unearthed

The BCC apparently has 106 40+ year old videotapes labeled "Dr Who".

If they can find equipment to run the tapes - The Center for Art and Media in Karlsruhe may be a good start -, the tapes may well turn out to be unplayable and/or disintegrate at the first attempt to digitise them.

Conservation of magnetic tape is a serious problem. According to Sarah Everts

(New Scientist, 24 Aug 2013) some 200 million hours of culturally valuable audiovisual content is in danger of disappearing entirely.

May be we should equate digitising analog videotapes with baking Babylonian clay

tablets by accidental fire which conserved them for millennia.

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Dutch oven overcooked in World Solar Challenge

harmjschoonhoven
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@Richard Wharram RE: "vapor-driven vessel of low-countries origin"

Something like

http://www.liedjesland.com/Liedjes/Sinterklaas/ZieGindsKomtDeStoomboot/ZieGindsKomtDeStoomboot.htm

?

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Down with Unicode! Why 16 bits per character is a right pain in the ASCII

harmjschoonhoven
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Megaphone

Re: The historical accident of little-endian

Arabic text is written right-to-left, but numbers are written left-to-right

in the opposite direction of the script (Teach yourself Arabic by J.R. Smart, page 33).

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Leaked docs: NSA 'Follow the money' team slurped BANK records, CREDIT CARD data

harmjschoonhoven
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Re: More proof

Osama bin Laden was not a goat farmer.

The bin Laden family made $5 billion in the construction industry, of which Osama later inherited around $25-30 million.

Upvoted you anyway.

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Enterprise storage: A history of paper, rust and flash silicon

harmjschoonhoven
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Boffin

Stop that tape

HP mini's, I worked with in the 1970's, used 8-bit paper tape.

The reader could scan the tape at full speed and halt at a given byte by activating a magnetic clamp.

Given the kinetic energy of the moving tape and the speed of the action working on a small area the paper should be scorched.

What in stead happened was that the tape was clamped and a pair of shockwaves was send through the tape which dissipated without damaging the tape.

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MYSTERY of Guardian mobos and graphics cards which 'held Snowden files'

harmjschoonhoven
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Headmaster

Re: Turing turning in his grave

@Lee D

Alan Turing was cremated at Woking Crematorium on 12 June 1954. Turing's ashes were scattered there. Otherwise Turing has plenty of reasons to turn in his grave

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Why data storage technology is pretty much PERFECT

harmjschoonhoven
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Facepalm

Not so random errors

In the 1990s the Dutch retail chain "Kruitvat" sold low-cost recordable CDs.

When a colleague showed me the physical location of the sectors where error correction was necessary a few months after recording, I could read "Kruitvat", exactly matching the logo proudly printed on the CD in the wrong kind of ink.

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Your own £19 Pocket Spacecraft could be FOUND ON THE MOON

harmjschoonhoven
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Stop

Littering the Moon

NASA uses a variety of methods to measure, control and reduce spacecraft microbial contamination for planetary protection purposes. http://planetaryprotection.nasa.gov/methods

I am afraid that the PocketSpacecaft project as proposed will upset the delicate microbial balance on the Moon.

http://t0.gstatic.com/images?q=tbn:ANd9GcTjQeELPI2HojUF8F69bJQrK0qLNhqRgpIC318bzqdj9zegjP5Naw

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Tickle my balls, stroke my button and blow the fluff from my crack

harmjschoonhoven
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There is a story that a class of KLM stewardesses, first confronted with a computer mouse (I personally know a KLM stewardess who is quite familial with the animal variant, al least her cat is) tried to move them over the screen like a lightpen, a device predating the mouse.

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NASA to flip ion engine's 'OFF' switch after brilliant 5.5 year burn

harmjschoonhoven
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Happy

Re: Thanks NASA

Well, due to the rotation of The Galaxy alone NEXT and earth with it moved 43200 million km in 48 kh.

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How Alan Turing wanted to base EDSAC's memory on BOOZE

harmjschoonhoven
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Boffin

Re: Then there is another problem...

Hb. Chem.& Phys. 53rd Ed., E41 gives the velocity of sound in m/s at 25+t°C as:

Ethanol: 1207-4.0t

Water (distilled): 1496.7+2.4t

--> 37.5% ethanol, 62.5% water 1388+0t (estimated)

So Turing was right. Gin (and Vodka) are OK. Vermouth (16-18% ABV) won't work in a delay line.

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Young blokes blinded by video-game addiction: THE FACTS

harmjschoonhoven
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Boffin

Re: Cause and effect?

We need a double-blind test - definitely.

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How NSA spooks spaffed my DAD'S DATA ALL OVER THE WEB

harmjschoonhoven
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Holmes

The usual suspects.

Bytes 1274 to 1320 of http://regmedia.co.uk/2013/06/12/prism_slide.jpg (the first picture of the post) read

"Copyright 2007 Apple Inc., all rights reserved."

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Boffins build gesture recognition using WiFi

harmjschoonhoven
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Re: Two weak spots

@Graham Dawson

Please, do not compare the WiSee technology, impressive as it is, with a modern radar system like that of the S-300.

http://en.wikipedia.org/wiki/S-300_%28missile%29

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harmjschoonhoven
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FAIL

Two weak spots

1)

"You always perform a startup sequence of gestures to get into the control system before sending the real gesture commands. The startup squence (sic) could be relatively long so false positives become rare cases. Such a startup sequence can also serve as your personal password."

There is no way to see you entered the RIGHT startup sequence before you send the commands, in particular if you are not in the same room as the WiSee enabled Wi-Fi router.

2)

"WiSee technology uses multiple antennas to focus on one user to detect the person's gesture."

There is no way to track a person.

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Film crew plans dig to find lost burial ground of Atari's E.T.

harmjschoonhoven
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Mushroom

Don't dig in the desert

" \"I hope more people find out about Alamogordo through this opportunity that we have to unearth the Atari games in the landfill,\" Alamogordo mayor Susie Galea said."

I thought Alamogordo was already worldfamous/notorious by the Pu239 from the Trinity test burried there.

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Herschel Space Observatory spots galaxies merging

harmjschoonhoven
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Boffin

Re: Give way to whoever's biggest.

Galaxies do not have to give way. They just attract each other - gravity you know - and merge.

Cars, other vehicles and pedestrians get their shape from electromagnetic forces and do not merge.

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It! Started! With! A! GIF!... Yahoo! Actually! Buys! Tumblr! for! $1bn!

harmjschoonhoven
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Go

Tulip mania

Tulipomania is small fish compared to trading a company with 178 employees, including the cat, for 1100000000.00 USD.

http://en.wikipedia.org/wiki/Tulipmania

Even in capital intensive petrochemical industry investments are in general below 1 million USD per employee.

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Sun lets loose with THREE record eruptions in 24 hours

harmjschoonhoven
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Unhappy

Re: youtube ywfewbzmvrw

No in-picture timestamps (with eight minute ambiguity of course).

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Degenerate dwarfs tear neighbors limb from limb

harmjschoonhoven
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@ShelLuser

There are no molecules at a WD, that severely restricts the choice of medicines.

Only elemental iodine as a disinfectant comes to mind.

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'Liberator': Proof that you can't make a working gun in a 3D printer

harmjschoonhoven
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Black Helicopters

Re: But...but....

From the Dutch law on firearms (Wet wapens en munitie, translated):

"Category I 7° other objects that can form a serious personal threat as indicated by Our Minister or that look like a weapon appropriate for threat or extortion."

So no need for a Liberator here, just print your Walther P5 in soap and paint it black.

BTW the Liberator seems as good as the gun that exploded and killed James II of Scotland at the siege of Roxburgh in 1460.

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INSATIABLE black hole in Milky Way's heart crams hot gas into cavity

harmjschoonhoven
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Unhappy

Bootnote

The <real> news is the death of Herschel.

http://www.esa.int/For_Media/Press_Releases/Herschel_closes_its_eyes_on_the_Universe

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NORKS powers down whole towns to find pirates

harmjschoonhoven
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Re: Surely that's untrue?

Can't you open most DVD-players with a paperclip and hide the contrabande?

Wait, in the DPRK the only people who have ever seen, let alone bend, a paperclip are probably army generals or nuclear engineers.

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Ban drones taking snaps of homes, rages Google boss... That's HIS job, right?

harmjschoonhoven
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Headmaster

Re: OK...translation.

Obersturmbannführer (as in "Banner") not Übersturmbahnführer (as in "Eisenbahn").

See http://de.wikipedia.org/wiki/Sturmbannf%C3%BChrer. Upvoted you anyway.

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Space elevators, vacuum chutes: What next for big rocket tech?

harmjschoonhoven
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Facepalm

Re: Feasible Space Elevators

Designers of Space Elevators should not ignore the Coriolis-force, unless they are writing a work of fiction.

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Kissinger and tell: WikiLeaks scrapes 1.7m US diplomatic reports from the '70s

harmjschoonhoven
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Happy

Re: Old news

Although (re)reading I.F. Stone's "The Hidden History of the Korean War" is very interesting.

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iPads in education: Not actually evil, but pretty close

harmjschoonhoven
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Happy

Re: I tried painting on an iPad - turned out to be load of Pollocks!

You should have sold the iPad at auction.

From http://en.wikipedia.org/wiki/Jackson_Pollock:

In November 2006, Pollock's No. 5, 1948 became the world's most expensive painting, when it was sold privately to an undisclosed buyer for the sum of $140,000,000.

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Researcher sets up illegal 420,000 node botnet for IPv4 internet map

harmjschoonhoven
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Re: Researcher sets up botnet

Installing software on a system you do not know and execute it on said system of which you do not know the purpose is a crime FULL STOP

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Are your servers PETS or CATTLE?

harmjschoonhoven
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Stop

Re: when they get ill, you get another one

Cattle get more care than dogs and cats that are dumped by their owners when they go on holiday. After all they are the farmers capital and are given names like "Betsy24" - at least in Holland.

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Indian atomic boffins draw up plans for 50,000 TONNE magnet

harmjschoonhoven
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FAIL

Re: I had visions of...

The INO magnet will be housed 1300 meters below the carpark.

Moreover the Tata Nano has an aluminium engine ....

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Is world's first space tourist Dennis Tito planning a trip to Mars?

harmjschoonhoven
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Meh

Re: He isn't walking on Mars...

Why not just send a couple of radiationhardened ants on a flyby around Mars?

They 'll inherit the earth anyway.

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Curiosity photographs mysterious metal object on Martian rock

harmjschoonhoven
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Meh

Re: Original Image

http://curiosityrover.com/imgpoint.php?name=0173MR0926020000E1_DXXX shows that the image covers the path taken by Curiosity.

The object seems to be something the rover 'lost', deliberately or otherwise.

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