Errors in the Encyclopædia Britannica that have been corrected in Wikipedia

This is lovely — a Wikipedia page detailing errors in the Encyclopædia Britannica that have been corrected in Wikipedia.

This page catalogs some mistakes and omissions in Encyclopædia Britannica (EB) and shows how they have been corrected in Wikipedia. Some errors have already been corrected in Britannica’s online version.

These examples can serve as useful reminders of the fact that no encyclopedia can ever expect to be perfectly error-free (which is sometimes forgotten when Wikipedia is compared to traditional encyclopedias), and as an illustration of the advantages of an editorial process where anybody can correct an error at any time. However, this page is not intended to be a comparison of the overall quality of both encyclopedias, nor as a dismissal of concerns about the reliability of Wikipedia.

Thanks to my colleague Andrew Cupples for the link.

So what happened to Skype on August 16?

From the Skype blog

On Thursday, 16th August 2007, the Skype peer-to-peer network became unstable and suffered a critical disruption. The disruption was triggered by a massive restart of our users’ computers across the globe within a very short timeframe as they re-booted after receiving a routine set of patches through Windows Update.

The high number of restarts affected Skype’s network resources. This caused a flood of log-in requests, which, combined with the lack of peer-to-peer network resources, prompted a chain reaction that had a critical impact.

So it was all Microsoft’s fault then? Er, not quite.

Normally Skype’s peer-to-peer network has an inbuilt ability to self-heal, however, this event revealed a previously unseen software bug within the network resource allocation algorithm which prevented the self-healing function from working quickly. Regrettably, as a result of this disruption, Skype was unavailable to the majority of its users for approximately two days.

The issue has now been identified explicitly within Skype. We can confirm categorically that no malicious activities were attributed or that our users’ security was not, at any point, at risk.

This disruption was unprecedented in terms of its impact and scope. We would like to point out that very few technologies or communications networks today are guaranteed to operate without interruptions.

Hmmm…. Maybe. But, as GMSV observes,

what about interruptions that result from a scheduled event that has been occurring once a month for three years now? Each Patch Tuesday, Microsoft sends out its latest batch of fixes, and the millions of Windows machines dutifully download and reboot. What was different in this case? That’s just one of the issues that still need to be addressed if Skype and its owner, eBay, hope to rebuild trust.

There’s some scepticism in the blogosphere about the Skype explanation. For example, this:

1.Windows Update by default runs at 3am local time. So even if all Windows-based PCs in the world would restart they would not restart all at the same time, but over a 24 hour “follow the sun” period. The entire Skype user based is spread over 24 time zones, not in a single time zone.

2.Windows Update is delivered every second Tuesday of the month, and has been for the last three years. Why it only happened now?

3.Windows Update starts on Tuesday, and counting the timezones, the last country to reach that time would be here in New Zealand, which happens to be Wednesday morning local time. If the problem happened Thursday as claimed by Skype, this was Friday morning in New Zealand, almost two days after the automatic Windows Update.

Footnote: By my reckoning the next Windows Patch Tuesday is 9/11. I just mention it.

That credit crisis, contd.

From today’s Telegraph

Switzerland’s top banker has warned of massive losses from the unfolding credit crisis, describing the collapse in US lending standards as “unbelievable”.

Jean-Pierre Roth, president of the Swiss National Bank, said market turmoil was far from over as tremors from the sub-prime debacle continued to rock the world.

“We’re certainly not at the end of the story. There are question marks surrounding the development of the American economy,” he said. “Something unbelievable happened. People who had neither income nor capital got credit with very attractive conditions. Now reality is striking back,” he said.

In Germany, the state bank SachsenLB admitted that it had received a €17.3bn bail-out after its investment arm Ormond Quai racked up huge losses on US sub-prime debt. It had previously denied holding direct exposure to sub-prime…

The Economist deployed a nice simile to explain what’s been going on:

THE old-fashioned financial system was like Old Maid, a parlour game once beloved of small children. The banks were like players, dealt hands from a pack of cards, which they swapped among each other. At the end, one player was left holding a lonely queen—a bad debt, if you will—and lost. Over the past few decades the game has changed. Securitisation has snipped the old maid into pieces; new faces, such as hedge funds, have joined the party, enabling the banks to distribute those pieces among a larger number of players. When the game is over, lots of players are left holding small losses instead of one player holding a big one.

During two exceedingly prosperous decades, that theory seemed to work just fine. But the swings in almost all financial markets this month have made dispersed risk suddenly morph into dispersed mistrust. The uncertainty has been magnified by the way that bad risks have become so hard to value. Investors have bought asset-backed securities that use shaky subprime mortgages in America as collateral, but as defaults have risen, the value of that collateral has tumbled. Meanwhile, collateralised-debt obligations (CDOs), made up of clumps of those securities and laced with leverage, have become almost impossible to trade. So none of the players really knows how much he has lost. While this uncertainty lasts, investors are taking it out on the banks that peddled the securities by dumping their shares; and the banks are taking it out on those they sold them to by demanding more collateral on their loans. The banks have even grown cagey about lending to each other.

And the conclusion?

At the end of Old Maid as banks used to play it, the loser would take a big write-off and then everyone could start playing again. In the new version, the use of leverage means the game is being played with hundreds of packs of cards and by thousands of different players. “Securitisation,” says Avinash Persaud of Intelligence Capital, a financial adviser, “has meant that credit risks have moved from knowledgeable, long-term hands, to fast hands, where the principal risk-management strategy is to sell before prices fall more”. Working out who has won and who has lost in this round will take a long time.

So while every day the markets don’t fall is a relief, there’s a dark cloud hanging over the entire system, and nobody knows yet how big it is.

Pushy?

From an ad in today’s New York Times.

I’ve been taking photographs for over 50 years, and have never yet pushed a shutter. Who writes this stuff?

Cloudprint

John Markoff reports a new initiative by HP in today’s New York Times

PALO ALTO, Calif., Aug. 18 — Hoping to alleviate a frustration of mobile computing, Hewlett-Packard has quietly introduced a free service designed to make it possible to print documents on any printer almost anywhere in the world. Cloudprint, which was developed over a period of several months by a small group of H.P. Labs researchers, makes it possible to share, store and print documents using a mobile phone.

The service emerged as the result of a conversation begun at the laboratory this year over how the computer and printing company might benefit from the introduction of the Apple iPhone, according to Patrick Scaglia, H.P.’s director for Internet and computing platforms technologies at the research lab.

“The world is going to flip,” Mr. Scaglia said. “We want to ride the wave of the Web.”

The underlying idea is to unhook physical documents from a user’s computer and printer and make it simple for travelers to take their documents with them and use them with no more than a cellphone and access to a local printer.

The service requires users to first “print” their documents to H.P. servers connected to the Internet. The system then assigns them a document code, and transmits that code to a cellphone, making it possible to retrieve and print the documents from any location.

Later, using the SMS message the service has sent to the user’s cellphone, it is possible to retrieve the documents by entering the user’s phone number and a document code on the Cloudprint Web site. The documents can then be retrieved as a PDF, ready to be printed at a nearby printer.

On this day…

… in 1968, the Soviet Union and other Warsaw Pact nations invaded Czechoslovakia to crush the ”Prague Spring” liberalization drive of Alexander Dubcek’s regime.