* Posts by John Smith 19

16330 publicly visible posts • joined 10 Jun 2009

NASA's ageing black hole-stalking probe switched off

John Smith 19 Gold badge
Boffin

The top of the atmosphere varies 10x at any one time.

and that is the biggest force on a satellite (below 1000Km) by a *large* margin. Given at least one NASA con-tractor (Raytheon?) is looking to de-orbit debris by puffing small bursts of gas in there path (so they plough into what is *relatively* a brick wall compared to the actual atmosphere at that height, and fall rapidly below orbital velocity while the cloud disperses) this variation is not that surprising. While daily and seasonal changes are *fairly* predictable there are solar flares which are not. That said it seems hard to believe that NASA did not leave *something* in the tanks to bring it down faster, or even solar panels pointing at right angles to the direction of flight in the atmosphere would have an effect.

Intel demos transparent-lid hybrid PC

John Smith 19 Gold badge
Unhappy

Finally an excuse to use even cheaper plastic for the case.

Brilliant.

I can barely control my excitement.

Smart meter SSL screw-up exposes punters' TV habits

John Smith 19 Gold badge
Boffin

So how difficult is it to configure an SSL certificate server *correctly*

Is it a task requiring many years of study and wearing of sandals?

Or just a case of RTFM?

You can teach knowledge, but you can't teach thoroughness.

BTW Sampling *every* meter every 2 secs. Note that's not switching tariffs every 2 secs.

How often are they planning to bill customers?

Arctic freshening not due to ice melt after all, says NASA

John Smith 19 Gold badge
Happy

@JeffyPooh

"Meanwhile, in many other locations, freshwater falls from the sky like rain."

Quite true. The UK being quite a good example.

I wounder how many hose pipe bans they will have this year?

"My residence consumes essentially zero water. We pull it from a deep well, annoy it for a day or two, and then return it to the forest through the on-site state-of-the-art septic system. Not quite closed loop, but effectively similar as we simply borrow the water."

Impressive, but I wonder how many houses could afford the space in a built up area?

"Many rivers are similar, with at least some water molecules passing through several citizens on their journey from the mountains to the sea."

IIRC it was said London water was clean because it had been through 7 sets of Kidneys already.

In truth I'm not sure how valuable fresh water is as a resource to that part of Russia, just that hanging onto it is usually a good idea.

John Smith 19 Gold badge
Boffin

Still leaves the $64 questions

While the total volume of fresh water going into the arctic ocean seems unchanged will its effect on salt *concentration* affect the ability of the "conveyor" current to move warm water around?

IIRC its the density gradients between fresh and salt water that drive this process so what's the tipping at which the forces are too low to move the current?

I'll note that fresh water is a *very* important natural resource in many parts of the world and the Russians might make better use of it by collecting it.

John Smith 19 Gold badge
Thumb Up

So the *total* salt level going into the sea is *unchanged*

But with so few climate scientists in the former soviet union to *measure* it no one knew.

Yet another case of "The sky is falling" turning into "actually half the model was missing and when we *bothered* to fill it in (that whole account-for-all-known-variables thing you're meant to do in *real* science) it turned out it wasn't"

This is good news for improving the global circulation models but once again *boy* has it taken a *long* time to get here.

Thumbs up for the science. The fact the result is optimistic regarding future climate change is a *bonus*.

Symantec downplays source-code trophy theft

John Smith 19 Gold badge
FAIL

But don't worry as old source code is *never* used in newer products.

I believe them.

Honest I do.

'Mainstream media' mute in SOPA piracy debate

John Smith 19 Gold badge
Unhappy

Monocultures of *all* kinds are susceptible.

Plants, crop fungus.

Operating systems, viruses.

Large centrally owned media conglomerates, group think.

US 'space warplane' may be spying on Chinese spacelab

John Smith 19 Gold badge
Happy

AC@13:22

"the chinese should just make up dumb stories about secret projects in space etc etc. The US will spend gazzillions to try to see whats going on. "

Worked out fine when the Russians did it in the early 50's with the "Nuclear powered bomber" scam.

Worked out pretty well for the US with SDI in the 80's.

No reason it shouldn't work for the Chinese in the 10's.

A (paranoid) fool and their money are easily parted....

John Smith 19 Gold badge
Meh

AC@14:52

180 orbits (at about 90 mins an orbit) is 1 intersection every 11 1/4 days, probably at a fairly high passing rate.

This is not exactly real time surveillance.

However as others have pointed out its enough to radar map the exterior (unexpected bulges photoshopped out of the official pictures), perhaps some signals intelligence (if the Chinese haven't switched any special equipment off)

And of of course for the *really* paranoid a quick check to see if its not carrying an orbital nuclear device of some kind (I didn't say bomb, no one is saying bomb, just something whose ingredients might glow in the dark a bit).

ICO to 'focus' on health sector when enforcing info rights

John Smith 19 Gold badge
Unhappy

Nothing will change until *senior* officials get fired or go to jail.

Until then it's just an accountancy problem (unless the fine can *bankrupt* the institution).

World's first mixed-embryo rhesus monkeys born in US

John Smith 19 Gold badge
Headmaster

I thought a chimera was made from *different* species

But finding out the differences between mouse and primate stem cells and learning how far you can push the mouse is just like a human analogy is a *key* piece of information for all future researchers in this area.

Steve Jobs action figure set for shop shelves

John Smith 19 Gold badge
Thumb Up

So much disrespect for the recently departed.

And soon to be sanctified.

It gives me a real feeling of hope for the world.

John Smith 19 Gold badge
WTF?

Looks like Salman Rushdie to me.

But it's been a while.

UK's solar 'leccy cash slash ruled unlawful

John Smith 19 Gold badge
Happy

And of course there is always this

http://www.channel4.com/news/is-the-future-of-british-coal-burning-it-underground

Fire in the hole!

John Smith 19 Gold badge
Boffin

It was the *timing* of the cuts that was the problem.

As others have noted they took place *before* the consultation process had ended.

Which does not make it much of a consultation.

Note the UK has some of the *worst* building regs in Europe for insulation. Some say it's because housebuilders complained that thicker insulation -> higher costs + smaller rooms or fewer houses on a plot.

Current UK estimates put the additional hardware costs of the "Passivehaus" standard at 14%.

Actually the real cost is likely to be training the UK standard construction worker to do their job *well* enough to make it sufficiently airtight to *eliminate* the GCH common to UK houses (eliminating *active* heating is a key objective of this 20 year old standard).

Note that renewable does not *have* to equal unreliable. Micro hydro, nuclear, tidal, wave, anaerobic digestion and geothermal are *all* capable of *reliable* (either 24/7 or well characterised) power output.

Better think of something though. The 20-25% of UK electricity provided by nuclear reactors is going to be going away sometime fairly soon.

UK space agency to boldly send techies ... behind a desk

John Smith 19 Gold badge
Happy

Reaction Engines might be hiring as well.

Provided their pre-cooler tests go off OK and roughly £200m gets released.

Lincolnshire cops to chuck £200m at G4S in ICT deal

John Smith 19 Gold badge
Unhappy

I said there *might* be a way to make this work

I also said what it's chances of working out were.

IRL, I think they be f***ed.

John Smith 19 Gold badge
Meh

There *might* be a way to make this work out.

G4S *studies* the back office systems (paper and computer based) and discovers inefficiencies which they remove (assuming their contract actually *motivates* them to do this).

Other forces buy into the services and the forces work together to *converge* their processes, giving a single shared, processes across all forces operating out of a single (well connected and secure) site, reducing manpower, office space

Probability this little fantasy will work out.

Higher than me being invited on a date by a super model.

But not by much.

That Brit-built £22 computer: Yours for just £1,900 or more

John Smith 19 Gold badge
Facepalm

They're *collectibles*

As in first edition books, stamps, etc.

They may be used but I bet most of the buyers will keep them in their original packaging.

As for reverse engineering, I'll doubt anyone could match the price unless they are prepared to order roughly 10x the quantity of chips from Broadcomm.

US deploys 1.8 gigapixel helicopter surveillance drones to Afghanistan

John Smith 19 Gold badge
Coat

"There's *always* an enemy, Steed.

You just need to know where to look"

The secret to getting rich in 2012: Open APIs

John Smith 19 Gold badge
Joke

As Microsoft know this is a hearts and minds campagn

Grab them by the API's (and the proprietary data formats) and their hearts and minds follow right along.

Iran spy drone GPS hijack boasts: Rubbish, say experts

John Smith 19 Gold badge
Boffin

A note on GPS antennas

Most high data rate sat systems are either in geosynchronous orbit (IE *fixed* in the sky) or needing to communicate with 1 sat at a time (LEO comms constellations like Iridium and Orbcomm).

The usual answer is a *steerable* dish in azimuth and direction to track the *single* target while the platform moves, while receiving or sending a signal across a *very* narrow angle of sky.

GPS does not have this luxury. Signals could come from anywhere across the whole visible *hemisphere* of sky, 180deg in *either* direction.

And a GPS receiver has to track *four* satellites for a fix. Not 1 or 2.

The *simplest* solution is a special *passive* aerial with good coverage in a blister on the top side of the vehicle. Phased arrays have trouble down to the horizon ("endfire") and add complexity. Multiple blisters worsen aerodynamics (and presumably stealth characteristics).

Tests have been done for using GPS for *attitude* determination on satellites (JPL and IIRC SSTL have done so), which is a similar problem.

Obviously depending on how seriously people take this capability future designs may choose to go with other aerial and receiver options.Modern DSP based GPS receivers can have enough "channels" to track *all* visible satellites continuously.

BTW the CSM article *names* a General supposedly involved in the programme (who was reportedly dead of a heart attack shortly afterward) who should be senior enough to speak with some authority on the project. It's not entirely an anonymous informant.

John Smith 19 Gold badge
Happy

@Looking At The Clouds

"As the drones appear to be made for high-altitude operation, an obvious option should be celestial navigation. "

True

"It is of course not as precise as GPS, but certainly much better than an internal navigation system,"

A presumption. Star tracking nav systems were developed by NAA Autonetic and their successor companies. They were used on the SR71 for precision fixes on the ground sites being photographed. The B2 also has one in it's upper wing. Some of the stars used are daylight visible (with the right filters) and a computer controlled system developed for US Army ground survey was accurate to c6m.

John Smith 19 Gold badge
Boffin

How it *might* be done.

For starters you'd need a radio base *above* the drone (It's GPS aerial/s are likely above the fuselage for best access to the sky). Note the receiver power levels (IIRC -160dBmw, that's about 2^53 below the reference power level) so "swamping" it from say a couple of Km above it is not going to take too much *real* power. Think car battery, not truck engine.

Switch on the jamming and cut off the drone from GPS reception.

Switch on the GPS simulator channels (You'll need at least 4 of them, on 2 channels) with a position *plausibly* close to where the drone thinks it is (from its internal IMU package) and start walking.

Note the initial data string, tap positions and shift register length for the military code have (AFAIK) *never* been published. It has been stated (in the USG design docs) that each satellite uses a different section (IE different point in the sequence) of the *same* code with the same taps. The code per satellite repeats over roughly 1 week at 10.24MHz and is roughly 1/10 of the full capacity of the shift register generator. You have to think in terms of early 1970s TTL chips. Calculating its likely length is none of my business.

The military code *can* be encrypted but I'm not sure how often it is (like Selective Availability for the C/A code it is *optional*). There is at least one paper in the open literature about it but the USG has never officially released it. Give how widespread GPS is the key is likely to be transmitted in the more frequently repeated parts of the 300 bit frames that make up the full 12.5min GPS data stream, allowing potential lock up in 6 secs rather than 12.5 (which is a *long* time in guided weapons).

With fast enough logic it might not even be necessary to have your own atomic clock. Use the *real* GPS stream to work out your position, calculate the numeric offsets needed to push your target in the right direction and re-encode for for the drone to receive it.

In an era of GHz logic a country with sufficient resources could get something like this made on a reasonable budget in the way the EFF finally built a DES cracker to *prove* once and for all DES was no longer secure. A fairly modest 2Ghz processor could run 200 instructions to process each bit sent.

Easier than just shooting it down or jamming the GPS and hoping it goes into some sort of emergency landing safe mode. No.

Within the financial and intellectual resources of a nation state with a substantial oil revenue. Definitely.

It was said no way could Afghanistani Jihadists read drone video (despite it not being encrypted). This proved incorrect.

Sun Tzu noted that those that show contempt for their enemies are likely to underestimate them until they ultimately loose.

CSC faces £1bn write-off over botched NHS IT project

John Smith 19 Gold badge
Unhappy

Sadly there are few *British* companies big enough to compete on these £Bn c ontracts

Although all of those that can seem perfectly capable of f***ing them up as well as any of their foreign rivals.

I will note that NpfIT was a joint f***up of the Dept of Health, NHS management (at various levels) and of course the monster IT "service providers" who *despite* being monster sizes (and expensive) seemed unable to support more than 1 web browser.

Note that unlike the US Gov (which can cancel contracts *unilaterally* with *no* compensation) HMG virtually *always* sticks to the contract and (apparently) *never* inserts penalty clauses.

I'll hope that this curbs CSC's more creative proposal writing efforts in the future.

But I doubt it.

Gov unveils plans to make tax-funded research freely accessible

John Smith 19 Gold badge
Unhappy

BIS has *lots* of research papers on research they have funded

But boy, try and find them. No workable search facility I've ever found.

For those looking for 1 off papers in the UK but not linked up to a proper academic library you might like to try interlibrary loans. These have a flat fee for single articles with no known page limit.

AFAIK the fee is *lots* lower than the typical fee charged by any learned society but with a fairly long delivery time (weeks, not days).

Cops arrest cop in alleged corrupt cop-bung probe

John Smith 19 Gold badge
Unhappy

She'll be the "One bad apple" as per usual.

Like the one bad apple that framed the Birmingham 6

The OBA that framed the Guidlford 4

The OBA that fitted up the Cardiff 3

But never fear. "Lessons will be learned"

Funny though that you'd have thought the folk on the NoTW would have met someone closer to their home offices around Wapping.

New chippery on parade at ISSCC

John Smith 19 Gold badge
Unhappy

Wow. Memory interleaved with processors.

The 80's have finally arrived*

*As in there is real *hardware*, weather or not it will be sold is another matter.

Ministry of Justice dreams of £1bn mega IT framework

John Smith 19 Gold badge
Unhappy

Chopping the Home Office in to 2 bits doesn't seem to have curbed their enthusiasm

for this sort of b***ocks.

I'd like to get the senior civil servants who think this s**t up (or their brain dead "masters") to write out

"Massive govt IT projects have a long history of failure to deliver either the cost, staffing or operational benefits they are touted as offering and are almost invariably late and over budget"

1000 times in pencil.

Remember Britards, it's *your* cash they will be splashing.

NASA finds first Earth-sized planets outside the solar system

John Smith 19 Gold badge
Meh

Still looking for Goldilocks

Not too big, not too small...

But getting closer.

AT&T's megablunder payout revealed

John Smith 19 Gold badge
Joke

"Dear Randall"

This is the best Christmas present we have ever had.

We could not have done it without you.

Thanks a Billion

Your old friend

Rene.

Somerset buses bin paper tickets, sniff journey-logging chips

John Smith 19 Gold badge
Joke

Note this system *currently* applies to people over 60.

Using CodgerTrac(TM) on your mobile you'll know when registered CD's are out and about (and more importantly if they're likely to drop in on you).

Plan your surprise visits with confidence knowing they won't have gone off somewhere. Be warned of impending inlaw arrivals, allowing the chance of a quick tidy up and hiding any embarrassing items you wouldn't want them to see.

Of course there will be down sides as clueful burglars use hacked versions to find out where they are in a block or street and do a block burglary when they're off to the local day care centre/church/bowling green

As Stephen Hawking might say "The possibilities are endless and limited only by the imagination."

John Smith 19 Gold badge
Thumb Down

"journeys will be logged electronically."

And you might ask "Why?" Probably because when central govt has a *choice* of building a system to do a job and one which collects *huge* amounts of personal data (it could be summarized but it's better to have the individual persons journey details just-in-case it needs to be analyzed at that level in the future. No idea when or what that would be of course)

Note the *implication* of this is a *national* buss pass, which (as always) in *theory* sounds like a great idea.

It's one of those ideas that "simple" ideas ("Why can't I use my GMPTE/WMPT/London Underground card *everywhere*") that is actually a PITA to implement.

Bit like the idea of a national IT system for law courts.

Except this one (slowly) seems to be *working*.

Thumbs up for idea, thumbs down for implementation.

Shareholders rage over Imation's incredible 88% plunge

John Smith 19 Gold badge
Unhappy

Who *owns* this company?

Somewhere along the line it seems that many US & UK managers forgot they are usually the companies highest paid *employees*. Putting Conrad Black in jail was a good start to reversing this view but I thing a few more could have done with checking into one of Uncle Sam hotels.

The *owners* are the people holding the stocks. However they seem to be mostly *corporate* investors, IE pension funds.

I can only presume that the stock pays out a good dividend, otherwise what excuse would they have for not trying to get the Board replaced?

The *only* part of the market which does seem to be working is *repeated* lousy results -> louse stock price, which suggest the market as a whole is not stupid enough to buy into this mess.

Shareholders have rights but it is up to them to *exercise* those rights.

John Smith 19 Gold badge
FAIL

Share cap < just the *cash* in the bank.

And someone hasn't started raising funds for a bit of asset stripping *already*?

US spy drone hijacked with GPS spoof hack, report says

John Smith 19 Gold badge

AC@23:229

"I seem to remember that the system transmits on 3 different bands. There is the open channel that used to have randomly drifting delays added to it, which is accurate to about 30m and is switched off occasionally (without requiring an act of war)."

No. The original GPS signals consisted of 2 signals transmitted on different frequencies.

As designed a military receiver would need *both* to get the full military grade accuracy. However the GPS satellites have been upgraded and do transmit other GPS signals designed to have improved characteristics for both military and civilian users.

Given the *very* large investment in GPS hardware I'm sure how well these have been adopted.

A US military system would be expected to carry a milspec 2 channel receiver so at a minimum you would need to generate the military version of the code and possibly its encrypted version, along with the civilian version.

John Smith 19 Gold badge
WTF?

I though "Tomorrow never dies" was a *ludicrous* plot for a Bond movie

Obviously not *quite* ludicrous enough.

Anti-piracy laws will smash internet, US constitution - legal eagles

John Smith 19 Gold badge
Unhappy

"total suppression of published opinion based on allegations "

I have some vague memory that was not quite the basis the US was founded upon.

Perhaps US citizens reading this would like to put pen to paper and remind their *elected* representatives of this fact.

Plastic semiconductor makes solar cells more efficient

John Smith 19 Gold badge
Happy

@Bernt Oestergaard

"The solar efficiency record is today around 42% and going on 50%, so the theoretical max. claims by this research seem somewhat outdated "

I think you'll find those figures are for cells with *multiple* junctions with somewhat exotic materials combinations and mfg methods IE space grade types.

They are *nothing* like the kinds that are in common use for terrestrial applications.

As for reflectivity I seem to recall when one of the US mfg started *seriously* rampping up production one of the things they did was to do a surface etc on their single crystal cells to give them pyramidal pits to act as an anti reflective coating.

Not universally applicable but demonstrates that sometime the smoothest surface is not the best.

But I'll certainly raise a glass to anything that can do AR coating effectively and cheaply.

Her Majesty's £444m court IT system can't even add up fines

John Smith 19 Gold badge
FAIL

"the only supported browser is IE6"

This just keeps getting better and better.

John Smith 19 Gold badge
Unhappy

And it was a PFI as well.

The Computer Weekly article is highly illuminating

http://www.computerweekly.com/feature/NHS-courts-5bn-IT-disaster-by-following-the-Libra-route

All the old classic govt systems BS turns up in this one.

Supplier cost estimates on "unrealistic" basis.

Supplier requires *repeated* renegotiation cycles built into the contract with them done on it's timescale.

"Risk transferred to the supplier" *except* system cannot be allowed to fail and *no* backup supplier.

Installation across *hundreds* of sites (many of them quite old buildings) not expected to be a problem

Business processes (yes it's a bit pompous but that's what they are) not analyzed or converged *before* national system is rolled out so *common* tasks the system is meant to be supporting are in fact *not* common.

Two earlier (but *much* cheaper) attempts to computerize bits of the UK law courts system had already failed, so a fairly rich crop of lessons to be learned *already*.

Congratulations Lord Chancellors office, you were Fujitsu's bitch.

John Smith 19 Gold badge
Unhappy

@Fibbles

"but the government really needs to start using some when negotiating these large IT contracts."

In govt IT terms £44m/PA is *not* a big contract.

Which given its *relatively* well defined boundary means there is even *less* reason for this f***up to occur.

Paul Allen latest plan: Space rockets on MEGA PLANE

John Smith 19 Gold badge
Unhappy

@Dani Eder

"After getting the carrier aircraft working, the obvious next step is to add some wings, landing gear, and small jet engines to the rocket first stage. "

No. Spacex is pursuing reusability for F9 doing *none* of these things.

I doubt they will abandon that approach unless they collect a *lot* of information to prove it won't work first.

John Smith 19 Gold badge
Happy

@beast666

"Why doesn't Mr Allen wise up and invest in Reaction Engine's Skylon and SABRE tech??? Seems much better than this white elephant..."

This might have something to do with a little thing called ITAR. It shouldn't but I'll be prepared to be bet that the US gov will claim "US citizen puts money into a space project, we claim rights to decide who uses it, where it can launch from etc." It's part of the reason why Virgin Galactic will be based in the US, because exporting even *that* level of tech is still likely to need a ton of paperwork, a special dispensation from the Senate and the sacrifice of a virgin or two.

CERN: 'New physics starts now'

John Smith 19 Gold badge
Happy

"new physics starts now"

Well I thought 60ns faster than light results might have had some impact....

Or perhaps the work on could formation being driven by Galactic cosmic ray input.,,,

SCADA vuln imperils critical infrastructure, feds warn

John Smith 19 Gold badge
Joke

Shhh. It's OK

1) No one will ever find about them.

2) Their staff will *never* tell anyone about them.

Opps

Paul Allen proposes new space launcher

John Smith 19 Gold badge
Boffin

A few points

Short production runs of highly specialized aircraft is what Scaled Composites *does*. That's BAU for them.

It's not clear if they just using the engines or keeping the fuselages as well.

As others have pointed out you gain some velocity (up to c300ms) and avoid some losses *but* not enough to eliminate a whole *stage* (AFAIK they are still talking TSTO).

It's not clear if you can use the nozzle developed for the Merlin vacuum variant or need another nozzle entirely. Which up's the development bill.

While Falcon 5 was *planned* it's unclear how far it's development has actually gone, while "Falcon 4" would seem to be a *completely* new vehicle.

That said given Spacex's highly modular approach to development *should* make the shift fairly easy.

*However* that leaves the problem that it's *very* doubtful any Falcon was designed to be carried *horizontally* while fully loaded with a payload attached. Might have enough margin that it's no big deal. Might not.

Learning about chip design from Silicon Roundabout

John Smith 19 Gold badge
Happy

The hair

is well weapon.

Post Office wins contract to take snaps of foreigners

John Smith 19 Gold badge
Big Brother

AC@11:07

"... even if it's just for garlic eating foreigners."

To begin with.

This smells of Lenin's admonishment to "Press the bayonet in. If it meets fat, press harder."