Saturday, February 13, 2010

Meraki Offers Browser-Based Wi-Fi Sniffer

Meraki offers up a Java tool for viewing Wi-Fi networks around you: The Meraki WiFi Stumbler is a browser-based tool for using your computer's 802.11 adapter to scan the air around you and report the SSID, MAC address (BSSID), 802.11 standard (g, n, etc.), channel, signal strength, maker (if known from MAC address), and security standards used. This is the first browser-based tool that I've seen that replicates the functionality needed to make channel selection and siting choices.

Because of the Java requirement, the tool works only in browsers like Firefox, Internet Explorer, and Safari that support Java. For some reason, only Windows and Mac are currently supported; Linux is not, but that might relate to the state of monolithic driver support in the open-source kernel. You can use the stumbler without an Internet connection in Firefox 3.5 only.

I made a very short screencast showing how it works. Looks like I was wrong in what I said in the screencast: there were simply no 5 GHz networks in the vicinity for a long time (I spotted one later); my desktop Mac does have 802.11n capability.




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Riding the Wi-Fi Bus in Arizona

Prevalence of laptops makes long bus rides into quiet study halls: This is the kind of technology coverage, I'd like to see more of, showing how a couple separate pieces of tech when combined produce a big change in people's lives. Students in Vail, Arizona, ride on a Wi-Fi bus, which uses a mobile broadband router (Autonet) to power their laptops en route.

The longer battery life in laptops, which have become ever cheaper, coupled with greater coverage of the fastest flavors of 3G, mean that students can actually get real work done that requires an Internet connection. The bus driver reports less rowdiness, and teachers are seeing more homework.

For business travelers, ubiquitous access in planes, trains, buses, and ferries might still mean an extension of the work day instead of a displacement of formerly useless time into productive activities. But for students on buses, the time can be lost--and then displaced into evening hours, reducing their time for unstructured activities.

Lest you think this is a rural issue, my wife recently calculated that when our 5 year old heads to middle school in several years, the busing system would probably require he spend 80 minutes on a bus to get to a school about a 10-minute drive away.



Laptop-Free Weekend Experiment at Oakland CafeMen At Work found guilty of plagiarism

Thursday, February 11, 2010

GQ on Dangers of EMF

I finally read the GQ piece that's been widely cited as "proving" the dangers of electromagnetic radiation produced by cell phones: It's a piece of crap. The article spends the vast majority of its time looking into corporate conspiracy to keep news about cell-radiation issues silent, and giving a forum to anecdote and studies that have since been shredded to pieces for lack of rigor.

I don't doubt that corporations have worked hard to prevent studies from coming out that would show any correlation of risk, because that's a common pattern for large corporations. That said, there's such a huge amount of data, and studies with such large cohorts, it's hard to believe that companies were successful in "suppressing" such data.

The reason I even address GQ, provider of fine investigative journalism that it is not, is that a Santa Fe resident was nearly hauled out of a city council meeting after arguing against installing more wireless base stations--perhaps for cellular. The Los Alamos National Laboratory physicist Frank Bruno is pictured in this article holding up this awful GQ story as part of his proof that microwave radiation is deadly. So it can't be ignored.

I'm going to focus on two elements in the story, because it's mostly full of farragoes and nonsense.

The first is the Interphone study, the best science cited in the article. Thousands of people with certain cancers that seem likely to result from close proximity to cell phones were selected, interviewed, and results compared against interviews with controls selected from the population at large in those countries. Despite the huge amount of effort to recruit subjects, just under 8,000 participants with cancers were interviewed (several hundred per country) and under 7,000 controls.

But studies resulting from Interphone don't say what the GQ article alleges. The author writes, "Interphone researchers reported in 2008 that after a decade of cell-phone use, the chance of getting a brain tumor—specifically on the side of the head where you use the phone—goes up as much as 40 percent for adults." That's not inaccurate, but it leaves out 100 percent of the context.

The study itself (International Journal of Cancer, Vol 120, Issue 8, 2007), which perhaps the GQ author didn't read, notes, "The results of our analyses do not provide consistent evidence for increased risk of glioma related to use of mobile phones. We did not find indications of increased risk related to regular mobile phone use overall, or in the majority of the subanalyses based on various exposure characteristics. The most exposed group (the highest 10% based on the exposure distribution among controls) did not show an elevated risk of glioma."

The study authors do not that in one subset of analysis that single-sided cell use, as reported by subjects, 10 or more years ago "was associated with significantly increased risk of glioma and there was also an increasing trend with years since first use on the ipsilateral side."

The study authors note that there's likely strong reporting bias on both use and which side a person regularly talks on. The conclusion about the higher rates: "This may be due to either chance or causal effect or information bias, i.e. overreporting of mobile phone use on the affected side by the cases with brain tumors."

The "latest update" on Interphone research--8 October 2008--citing this and other studies concludes fairly strongly that there are a few areas that should be looked at further, but that the data generally supports no pattern or revelation about a connection between cancers studied and cell phone usage patterns.

I won't go into every other item mentioned in the GQ article, because we have had discussions at this site over the years on these subjects.

What I will mention is that none of the vast array of credible information contrary to the conclusions of this author and, obviously, GQ, were mentioned except in passing. This includes the now dozens of well-conducted, published studies that find no connection between a signal and "electrosensitivity," and some of which show the presence of measurable, severe symptoms whether a signal is present or absent.

The second element simply reveals the poor knowledge of the reporter and factchecking employed by GQ. The article notes,

In the summer of 2006, a super-Wi-Fi system known as WiMAX was tested in rural Sweden. Bombarded with signals, the residents of the village of Gtene—who had no knowledge that the transmitter had come online—were overcome by headaches, difficulty breathing, and blurred vision, according to a Swedish news report. Two residents reported to the hospital with heart arrhythmias, similar to those that, more than thirty years ago, Allen Frey induced in frog hearts. This happened only hours after the system was turned on, and as soon as it was powered down, the symptoms disappeared.

So where did this come from? I'd never heard of this. And WiMax wasn't commercially available except in test form in 2006. What non-cited "Swedish news report" covered this?

I used The Google to find out. First off, it wasn't summer, it was February 2006. Second, the report seems to have originated at the Inquirer on 12 June 2006, which links to an Australian bulletin-board on ISPs, which has a post by a reader named Brains, which links to a 23 May 2006 report from Sweden's STV network.

That report, which is neither available at the original URL, nor could I find by searching on stories on Gtene (of which there are many), is paraphrased here by someone who backs the electrosensitive theory. The story apparently came from a "current affairs program 'Debatt,'" rather than from public-health officials or other sources. Nor does the Australian link mention that the system was shut down; nor can I find any evidence it was.

Following this further, I found on an anti-EMF-use site that the Debatt program is, well, a debate: two Swedish experts pro and two con as to whether EMF poses a threat to health. The usual Swedish sources (Mona Nilsson and Olle Johansson) took the view that there was a threat to health. The Gtene story was apparently a lead-in, and it's unclear whether the guest representing the Swedish government provided any refutation to the details.

The GQ author follows this up by noting, "Today, Sprint Nextel and Clearwire are set to establish similar technology across the U.S., with a $7.2 billion government broadband stimulus speeding the rollout."

Dozens of WiMax systems are up and running in the United States, and hundreds worldwide (some quite modest). The power output of WiMax is comparable to cellular, although using mostly different frequencies. The notion that WiMax is something new and different than 3G from a signal perspective or "electrosmog" view is nonsense.

The GQ article doesn't advance any knowledge in this area, lacks rigor, and again gives credence to what is palpably a false cause for those suffering from real symptoms--ones that have been repeatedly shown to be unrelated to "cell radiation."



Chaska’s Local Paper Looks at Wi-Fi Pioneer Chaska.netPaul Weller denies Jam reunion

Wednesday, February 10, 2010

Google Funds Wi-Fi in The Dalles, Oregon

Google Funds Wi-Fi in The Dalles, Oregon

Google is giving the small Oregon town $100,000 to fund a Wi-Fi network downtown: Why? Because Google has a massive data center in the city, which is close to hydroelectric sources, and where Google has contracted (like many major firms with data centers) for vast amounts of energy at low, low rates. The center reportedly employees under 100 people to run a large number of servers and other equipment

Interestingly, one of the requirements of the grant, which the city council just voted this week to accept, is that the city may not filter content.

Google also operates a network in Mountain View, Calif., its headquarter town, and still sponsors a few park and city square networks. The company at one point was poised to underwrite free Wi-Fi in San Francisco and apparently in other cities, but the collapse of city-wide Wi-Fi paid by private firms for public access erased that possibility.



Robbie Williams set to rejoin Take ThatChaska’s Local Paper Looks at Wi-Fi Pioneer Chaska.net

Saturday, February 6, 2010

Laptop-Free Weekend Experiment at Oakland Cafe

Cafes are still struggling to sort out their identities with everyone toting a laptop and wanting Internet access: My friend Cyrus Farivar tipped me to a cafe near him in Oakland, Calif., that's trying not just turning off Wi-Fi, but asking folks to not use laptops at all. (That solves the 3G card problem, too.)

The Actual Cafe's owner, Sal Bednarz, posted a long entry on the experiment on a blog about the decision. He noted,

Laptop-Free Weekend Experiment at Oakland Cafe

When I walked out into our dining room last week, and saw a sea of laptops, with tangles of power cords everywhere, and so many people wearing headphones, it really upset me. And so I set out to figure out what was so upsetting, and why.

He goes on to talk about community - "we must each support it as individuals" - and then notes,

If we lose money because all or most of our seats are taken by people who spend little money and much time, our business is at risk. Cafes fail all the time. When that happens, we all lose.

This story, which keeps getting written - although I claim dibs as first! - resonates with people because it's about the erosion of conversation, communication, public space. It's about silencing voices. A room full of laptops has the odor of a library, and people shut up.

When a coffeeshop opened a few years ago near my home (not naming names), I went in the first week, and welcomed the manager. I told her how happy the neighborhood would be to have a cafe right there. Her reaction was pretty cold. Over a short time, I discovered that the cafe and its hiring practices favored frosty hip. The baristas have no charm. The place is dark wood, low lighting, semi-uncomfortable. It exudes, quiet, quiet, quiet. I've only been in there a half-dozen times since. (I'm not an annoying customer. In another shop near an old office, I learned every baristas' name, and won a free drink as a result, still am in touch with one manager, and helped get a friend hired. They would typically have my favorite drink in process before I got to the register.)

Cafes like Actual Cafe want to create a third place for people, in which commerce is a component, but conversation is part of what you get. You know the coffeeshops like this. You want in and there's a hum and a buzz, and a warm feeling, and the sound of the sssssshhhhhh from the espresso machine. The coffee may be good or great, but you go because the vibe makes you feel more human.

[Photo by Cyrus Farivar.]



Tiffany video and datesSan Francisco Airport Plans Free Wi-Fi

Free 802.1X via AuthenticateMyWiFi for a Single Access Point

Free 802.1X via AuthenticateMyWiFi for a Single Access Point

Veteran wireless writer Eric Geier's AuthenticateMyWiFi has added a free option for WPA/WPA2 Enterprise authentication: I'm a long-time advocate of using 802.1X in the form of WPA/WPA2 Enterprise to secure every size of business's Wi-Fi network. 802.1X allows an administrator to set passwords for users, just as with a network share or other network login, while the Wi-Fi side of the equation creates unique master key material. No two users share this material, making snooping impossible; with a shared WPA/WPA2 Personal key, any user with the key can intercept all other traffic.

Geier's service is designed for all sizes of business that want to outsource the authentication system, but he's added a single access point option at no cost. Small businesses should leap (that's 802.1X humor) to try it out.

There used to be several companies and products that make it easy to outsource or install 802.1X. No more. Geier's appears to be the last that's focused on outsourced 802.1X management. You can use an 802.1X server on your network if you have Mac OS X Server 10.5 or 10.6; it's also part of some versions of Windows Server.



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Chaska's Local Paper Looks at Wi-Fi Pioneer Chaska.net

Chaskas Local Paper Looks at Wi-Fi Pioneer Chaska.net

There was a time five years ago when you were legally obliged to mention Chaska, Minn., when writing about city-wide Wi-Fi: The small town was an early entrant into the idea of dealing with local broadband market failure to let residents jump from dial-up to a semblance of high-speed Internet. In some cities, like Lompoc, Calif., which launched efforts around the same time, cable and telco firms stepped up and made the Wi-Fi networks nearly unnecessary for indoor use.

Chaska.net still operates, however, although the operation is servicing debt and not accruing capital, which is the goal; current expenses aren't mentioned, but the setup costs were $3.3m, including $1m in fiber expense, the article in the Chaska Herald reports.

The network doesn't deliver just Wi-Fi in the city, but is part of a backbone that brings point-to-multipoint wireless broadband to smaller towns nearby, and to 36 business customers in town.

Chaska has a fairly stable base of about 2,100 subscribers, the article notes, expecting just a net add of 60 per year in the future. That's a huge uptake for a town that in 2000 has 24,000, which likely means 5,000 to 8,000 households. Subscriptions would likely be higher except the ability to get a signal isn't uniform across the town, which is true of all wireless systems, but Wi-Fi's low power limits makes it particularly susceptible.

Chaska was used by Tropos as its poster child when that firm was out trying to persuade firms and cities that high-quality "mesh" networks could be built for indoor and outdoor service using 20 to 25 nodes per square mile. Chaska never lived up to its marketing in those early days, and, Tropos at one point (apparently at its own cost) swapped out all the initial nodes installed in the city. I wrote rather heatedly about what I viewed as misleading information provided back on 12 June 2006.

It's nice to see that things worked out in Chaska. I should also note that this story, written by a local reporter, is the best example of local journalism looking at these sorts of networks that I've read in six years of covering municipal and metro-scale Wi-Fi.



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