* Posts by Gideon 1

115 posts • joined 3 Jul 2009

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Soundbites: News in brief from the Wi-Fi audiophile files

Gideon 1

"96Khz or 192khz? - 44.1 Khz is a higher 'resolution' already than my (and your) ears can hear. At 96khz and with the right equipment you are either tormening your dog or delighting him with bits of your music that you will never hear."

Higher sample rates improve the phase accuracy of high frequencies, not an issue for mono but in stereo it helps you pick up the direction a sound is coming from.

Higher sample rates also make the anti-aliasing filters much easier to design, and reduces their effects on the audio you can hear.

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What the BLOCK? Microsoft to gobble Minecraft-maker 'for $2bn'

Gideon 1

My kid has already got bored of Minecraft and moved on to other games, like Roblox which allows greater user game creation possibilities. If this the sale goes ahead Notch may have got his timing just right.

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Data entry REAR-END SNAFU: Weighty ballsup leads to plane take-off flap

Gideon 1

Re: Weigh the bloody thing

Much simpler: A strain gauge (resistor printed on a piece of sticky film, responds to stretch or compression) on the landing gear strut will measure its load.

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Gamma's not a goner! UK ISP sorts out major outage

Gideon 1

Not Gamma

We're on BT business broadband and got taken offline by the fault, so either it was BTs fault or BT route their broadband over Gammas network.

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Boffins brew TCP tuned to perform on lossy links like Wi-Fi networks

Gideon 1
Go

Re: Fixing at the wrong layer

Retries are bad, especially if the round trip time is long. Better is to increase the forward error correction to compensate for the radio link quality as it adds a much smaller overhead to both the local radio channel and the long distance fibre links, keeping the retry rates down. WiFi needs more of the redundancy coding goodness developed for LTE.

These studies often only consider their own data throughput, selfishly grabbing bandwidth at the expense of other users sharing the same links. TCP/IP was carefully designed to allow efficient sharing of limited bandwidth, and that is where many of these proposals fail.

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Gideon 1

Fixing at the wrong layer

It's the radio transport layer that needs the forward error correction applied when the signal gets ropey, sort it locally where there is information about signal strengths and error rates rather than have the TCP stack compensate for a problematic link that could be thousands of miles away.

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Gideon 1

Re: @Suricou Raven (was: @ Brian Scott (was: Broadcast?)_

UDP broadcast is used routinely even if you don't like it, e.g. by printers and printer drivers for auto discovery and toner low messages.

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Want to see at night? Here comes the infrared CONTACT LENS

Gideon 1

Micro-bolometer LWIR sensors don't need cooling, they operate at room temperature.

Also, if your contact lens were the size of goggles...

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Hands up if you have one good reason to port enterprise apps to ARM

Gideon 1
FAIL

Re: Hand is up

ARM can do both endians, but it is usually run in little endian mode just like x86.

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Ancient carving of 'first human-built holy place' = Primitive Vulture Central

Gideon 1

Erich Lester Haines von Daniken

...will be saying he's just visiting from outer space next.

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Google search biz offer BINNED by EU competition chief

Gideon 1

Re: vertical search?

"this was about Google's control of the search market meaning they can decide whether any web-based business goes bankrupt or not, and that they may pull these levers with impunity."

We've had experience of Google doing this. We appeared at positions in search results appropriate to our website and company size until Google noticed us and rang up saying they could 'optimize' our spend with them. When we said we were ok, thank you, we then mysteriously dropped right down the search results, and our adwords per-click minimum bid prices became very expensive even though nobody else seemed to be bidding for them.

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Picture this: Data-wrangling boffins say they have made JPEGs OBSOLETE

Gideon 1

Jpeg2000 never caught on either

It did, except it is called REDraw.

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Why Bletchley Park could never happen today

Gideon 1

Re: It's all about who you employ

Mossad agents have sometimes pretended to be from other nations security services.

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Gideon 1

It's all about who you employ

These leaks are failures of vetting, and failures of need-to-know policies. Both become difficult to maintain when the numbers of employees in the organisations reach the numbers in GCHQ and NSA.

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KVM kings unveil 'cloud operating system'

Gideon 1

Nothing new - move along now

Running without an OS is common stuff in embedded systems. Yawn.

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Devolo dLAN 500 AV Wireless Plus: Triple-tech connectivity for the home

Gideon 1

Some UK houses have them to feed a standard lamp from the main room light switch, or as a dedicated supply for an electric heater on night tariff, or even as a supply for a clock.

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For pity's sake: DON'T MOVE to the COUNTRY if you want to live

Gideon 1

Twisty roads...

Twisty roads aren't as dangerous as straight ones with occasional blind corners/dips. I live on one of the most dangerous roads in Scotland, the A70 which, like the A9, couldn't be described as twisty.

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Village-swallowing MUDCANO was no accident, say boffins

Gideon 1

The bbc news website version of this story has a lot more detail, including about how the scientists came to their conclusions. I'll leave it to you to find the link for it as our hosts here might not like me putting it up.

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Gadgets are NOT the perfect gift for REAL men

Gideon 1

Re: Bang on...

Giving her something like that has the benefit of lowering her expectations, and forces her to be more explicit about what she would really appreciate instead of expecting you to mind-read her.

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Gideon 1

So disappointed, after three boring minutes I was expecting its head to explode or something...

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Caterpillar B15: The Android smartphone for the building site

Gideon 1

Re: ...torches can be like pencils or tape-measures...

I discovered stainless tape measures, they work even if it rains.

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Gideon 1

No led?

Just install the Flashlight app.

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Inventor lobs spherical, throwable camera

Gideon 1

Re: Bad example.

It would take a very large amount of fire to attenuate the radio signal, e.g. earth atmosphere re-entry plasma.

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Gideon 1

Re: Nice idea but

Even very hot fires emit lots of thermal radiation in the long and medium wave IR bands. Have a look at Planck's law.

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Gideon 1

Re: Nice idea but

Yes, I'm sure, my work is developing thermal cameras. Thermal cameras show thermal radiation, from which actual temperatures can be inferred, not just differences in temperature. Walls and glass windows are opaque to thermal wavelengths, the wall will show a cold patch if the cold water is directly hitting and cooling the wall.

The heat from a person gradually spreads through the rubble through both conduction, convection and draughts. Thermal cameras can resolve very small temperature differences, in the order of 10s of milliKelvin, allowing you to see these effects.

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Gideon 1
Thumb Down

Re: Nice idea but

Thermal cameras can only see through walls in Hollywood films, not in real life.

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Live or let dial - phones ain’t what they used to be

Gideon 1
Thumb Up

Post Office 746 classic telephones (new but old stock with new cables) are still available after BT found a warehouse full of them and sold them on. They come in rather fetching 1970s colours.

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Whoever recently showed us the secret documents: Do get in touch

Gideon 1
Stop

Are you sure you want to do this?

This could be soliciting for information, and there is no "in the public interest" defence under the Official Secrets Act.

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BBC boffins ponder abstruse Ikea-style way of transmitting telly

Gideon 1

Re: Am I the only one...

It would be even better if they ditched DCT based compression for one that seamlessly supports decode to lower resolution, e.g. wavelet, for then the tv/mobile would only need to download enough resolution to fill its screen/bandwidth limit.

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Peak Apple: First 'profit slip' in a decade - and, boy, it's gonna be BIG

Gideon 1

Motorola and Nokia have shown how fickle the mobile biz is, one minute you're top of the heap making huge profits, next you are losing money on every phone you sell.

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Smart metering will disrupt weather forecasts, warns Met Office

Gideon 1
Boffin

Smart meters monitor voltage? Why?

You don't need smart meters to reduce demand peaks. Smart appliances monitor the mains FREQUENCY as it drops when the generators are overloaded. Voltage is automatically adjusted by the substation changing transformer winding tap.

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AMI PC firmware upgrade scare: The global security meltdown that wasn't

Gideon 1

Overstated

The PC bios has been disassembled and clean room rebuilt many times. Having the source code can help to find weaknesses, but a black hat still needs to look at the machine code dump to confirm one. In any case, if they were trying to make it very secure, they ought to publish it for others to analyse for weaknesses, obscurity is not security.

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'Leccy-starved Reg hack: 'How I survive on 1.5kW'

Gideon 1

Re: RE: 100 amp 3-phase supply installed

Decent metalworking lathes are typically run from a single to three phase invertor these days. You do not need or even want the high power availability of pukka three phase, if the tool catches in the workpiece your lathe will be in bits. Inverter drive also has the benefits of continuously variable speed, and soft start.

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Apple to ditch Intel – report

Gideon 1

Re: @ frank ly - @ M Gale

The butler tells the housekeeper to tell the servants to go shopping? No, the vendors come to the tradesmans entrance to drop off their goods. You cannot possibly know a typical Rolls Royce owner...

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Naughty-step Apple buries court-ordered apology with JavaScript

Gideon 1

It would be very embarrassing for Apple if the court ordered that their execs be imprisoned for a month if they ever set foot on British soil, the media worldwide would enjoy that. It's hard to see what else the court could do.

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Hackers deface 'sinful' French Euromillions site

Gideon 1

It gives them so much to hope for with a very small outlay. Fantastic value. Also, don't assume all pensioners are poor.

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Her Majesty's Secret Service opens a Q-Branch apprentice scheme

Gideon 1

Having employees strongly motivated by money in the intelligence community would be a security risk.

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Will Samsung's patent court doc leak backfire spectacularly?

Gideon 1

Jury of Your Peers

A Jury of Your Peers is an outdated form of justice, where a Lord would be tried before a jury of Lords, avoiding being automatically found guilty by a jury of serfs. A juries are now selected from lists of voters.

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LOHAN breathes fire in REHAB

Gideon 1

Re: Is that vacuum still vacuum?

Maybe the Aerotec motor won't even sustain a smolder in the vacuum?

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Gideon 1

Is the vacuum maintained during the delay between the igniter firing and the motor burn? The smolder could slowly reduce the vacuum to the point where the motor burns properly, which won't happen at altitude and could lead to an in-flight failure.

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Post-pub nosh deathmatch: Haggis pakora v huevos rancheros

Gideon 1

Our chip shops (Edinburgh) sell deep fried battered spicy haggis as well as the standard (premium?) stuff similarly attired. Would like to see it in spicy batter with curry sauce, mmm.

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BAE proposes GPS-less location

Gideon 1

Duh

The answer is GPS jammer seeking missiles.

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YouView recommends radio hams' pet peeve

Gideon 1

Works both ways

I hope the powerline networking kit is also immune to 100+ Watts of HF modulated carrier transmitted nearby, hehe.

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Resistive Ram cache to make Flash fly, say boffins

Gideon 1

"Write information on them too many times and you'll only be able to read them after that."

No, it will progressively get smaller as the flash blocks wear out. When the number of usable spare blocks drops to zero, you will need to delete (erase) data off the SSD before you can store anything new.

The bigger problem is that the filing indexes are also stored in flash, and when you run out of spare blocks to store them, the entire SSD can fail. The vendors tend to over provision the spare blocks to mitigate against this, but how successful has this strategy been?

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GAGA: Spinning blades, welding, wi-fi, what could possibly go wrong?

Gideon 1

Re: Why hasn't anyone considered using goats?

Goats are browsers, not grazers. They'll eat all your plants, bushes, trees, and washing on the line before jumping into the next garden to do the same, leaving the grass to grow. If you want grazers, try sheep or geese.

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Windows XP update fails in infinite .NET patch loop

Gideon 1

Yep, yet again.

I had this, the update even corrupted the installer files, preventing uninstall. Nuked .net entirely with the dotnetfx_cleanup_tool, it's amazing how much quicker the machine boots without .net.

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Vulture 2 trigger triggers serious head-scratching

Gideon 1

Re: Solar ignition!

...or launch when going dark, to get ascent footage during daylight. You could even use the same camera.

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Intelligence a genetic mistake

Gideon 1

Rats of Nimh?

Forget Skynet, this is far more dangerous!

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Major science fiction publisher to zap DRM

Gideon 1

Erm, Douglas Adams isn't likely to be telling them to drop DRM anytime soon, he's dead.

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