Friday, February 26, 2010

Electromagnetic Sickness Examined by LA Times

The LA Times has a pair of articles about the health risks associated with electromagnetic fields (EMF): They're rather thoughtful. The longer article starts by trying to claim that there's a "debate" and that experts "disagree," but then proceeds to present the factually accurate view that there are some researchers and outsiders who challenge the increasing preponderance of research that backs up the lack of a link between EMFs and health effects.

I particularly like this researcher and his statement:

In the opinion of Ken Foster, a professor of bioengineering at the University of Pennsylvania in Philadelphia who has studied EMFs since the early 1970s, if such fields were any sort of health threat, scientists wouldn't have to sort through the outer limits of statistics to find trouble. "There would be terrible effects all over the place," Foster says. As no obvious catastrophe has shown itself, "I would tend to think there's nothing there."

That's where I keep coming back to Occam's Razor related to EMF exposure. People who claim effects say that there are tens of millions of more people obviously suffering from effects, but the research (described quite well in the second LA Times article) doesn't back this up.

I would argue that electrosensitivity has been well and truly put to bed, and that means that the effects should show up in cancer studies, given the use of cell phones for longer than 10 years by a significant population. That's not showing up in general work, nor in studies like Interphone, which I wrote about a few days ago.

One set of analysis of a segment of the Interphone work showed a possible correlation between use of a cell phone for more than 10 years and, in those people who had certain kinds of brain tumors, the tumor appearing on the same side of the head as those who used a cell phone mostly on that side of the head.

But the researchers in that study noted quite clearly that there's a recollection bias. If you have a tumor next to your right ear, and researchers say 10 years or longer ago did you mostly use a cell phone on your right side, the expectation is that people tend to say they used the damaged side of the head.

I remember the concerns in the early 1990s about ELF/VLF (extremely and very low frequency) EMF produced by CRT-based computer monitors. Studies abounded that showed risks, especially from Sweden, but when you read the studies you found that exposing chicks to radiation at huge multiples of what normal exposure was, or that retrospective studies asked people detailed questions to correlate usage at old video display terminals (VDTs) and miscarriage, without eliminating other risk factors. The research was basically garbage, no link was ever found, and there were no bulges in epidemiology related to CRT use. It was forgotten.

I expect in time the same thing will happen here. With no smoking guns for cancers, no long-term health effects found, and electrosensitivity isolated again and again from the presence or absence of EMF, in 10 years we won't be talking about this at all.



Simon Cowell’s mum ’shocked’ at marriageNew SIM Card Turns Regular Phones into Wi-Fi Hotspots

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.



The Subways to headline 2000trees FestivalAT&T’s HSPA 7.2 Isn’t Quite What It Seems

New SIM Card Turns Regular Phones into Wi-Fi Hotspots

The SIMFi takes a little bit of effort to wrap one's head around: This offering from Sagem Orga and Telefonica, announced at the Barcenola Mobile World Congress this week, puts a Wi-Fi radio into a standard SIM (Subscriber Identity Module), which is used in all GSM devices to authenticate to the network and associate billing information. This allows a 3G feature phone without Wi-Fi built in to become a hotspot, sharing mobile broadband with netbooks, smartphones, and other devices. It's fiendishly ingenious, as it obviates putting a 3G modem into multiple devices while offering "tethering" without a cable.



Cablevision Tries a Cellular/Wi-Fi Phone

Cablevision Tries a Cellular/Wi-Fi Phone

While T-Mobile's UMA offering has been around for years, Cablevision may be trying something new: Cablevision's COO mentioned in the company's earnings call today that the firm is testing phones that will switch seamlessly between cellular and Wi-Fi networks. That sounds an awful lot like UMA (unlicensed mobile access), a standard used for roaming by T-Mobile in the US and several carriers around the world.

T-Mobile offers UMA because it lets them leverage other companies' broadband and its network of home and roaming Wi-Fi networks. T-Mobile operates relatively few hotspots now compared to when it was anchored by Starbucks, but the key to UMA is voice over Wi-Fi over a wired or wireless broadband connection at home.

Cablevision has an even easier time of it, because it provides its CT/NY/NJ Wi-Fi network only to users that subscribe to its home cable broadband service. So any phone it offers can carry voice over Wi-Fi at home over its cable network and outdoors over its Wi-Fi network. In the past, Cablevision has partnered with Sprint for wireless service. However, I'm unaware of any production UMA gear that would work on Sprint's network.

The notion of UMA is to reduce the cost to a carrier of subscribers while providing subscribers with more unrestricted minutes. T-Mobile's plans, for instance, offer unlimited domestic calling over Wi-Fi even for plans with modest numbers of cellular minutes. This keeps customers loyal and happy with a lower cost structure. Femtocells have the potential to offer similar advantages to T-Mobile's competitors, but none are being priced or marketed in that way yet.



Simon Cowell’s mum ’shocked’ at marriageClearwire Grows But Needs More Money Beyond 2010

Clearwire Grows But Needs More Money Beyond 2010

Clearwire says it's on track for 120m people passed in 2010; beyond that, more money needed: paidContent.org runs down Clearwire's earnings news, with the firm bringing in $80m in revenue, but a loss of nearly $100m. Subscribers stand at 688,000. The company will spend about $3b in 2010 to get to its target of 120m people to whom service would be available. But if the network is to grow any bigger, more cash is needed.

In contrast, T-Mobile has crossed 200m already in upgrading its 2G network to add 3G, and it's ostensibly on track to something approaching AT&T (233m) or Verizon (280m) levels. (Yes, those Christmas ads in which Verizon said it has the biggest 3G coverage are correctly, but the 50m gap is in small towns; AT&T has the big markets.)

Clearwire is leaning on Sprint for its fallback position, Sprint being the majority owner of Clearwire. If you get a combo 3G/4G USB modem or portable 3G/4G-to-Wi-Fi gateway, you can use 3G (up to 5 GB on Sprint's network) when away from a Clearwire area, and 4G in the footprint.

But Sprint has underspent on 3G. The company reports (the latest number I could find) 270m people passed with 3G with roaming. That's a critical point. Compare Verizon's native coverage map with Sprint's map, where Sprint shows gray for roaming, orange for 3G and tan for 2G:

Clearwire Grows But Needs More Money Beyond 2010

And here's Verizon's, where dark blue is 3G, green is 2G, and yellowish is roaming:

Clearwire Grows But Needs More Money Beyond 2010

Sprint has the big cities, sure, but it doesn't disclose its non-roaming footprint, and it limits 3G customers to no more than 300 MB per month of roaming data, after which point it can choose to cancel a mobile broadband contract.




Cheryl Cole isn’t motivated by moneyAlaska Switches to Aircell for Internet

Wednesday, February 24, 2010

Alaska Switches to Aircell for Internet

Alaska Switches to Aircell for Internet

Row 44 loses one of its two announced customers: Alaska Airlines apparently tired of waiting for Row 44 to raise the capital necessary to start building out its satellite-backed service, and has chosen to use Aircell. This is a blow for Row 44, which Southwest has picked, but for which we still have no details about financing: will Southwest back the installation, or Row 44 raise private capital? What will Southwest charge for service?

Row 44 has only a couple of non-announced airlines to pitch to in the US, and it's likely that airlines that haven't committed aren't planning to until there's more proof that Internet service produces happier customers who pay more for flights--as well as reasonable revenue from the service.

Alaska will put service on 737-800 long-haul planes first, then roll out fleetwide. The press release is fairly frank in stating why the airline switched: "Their reliable, lower-cost equipment can be installed quickly, allowing Alaska Airlines to introduce Gogo service to our customers as soon as possible."

I had written in the past that Alaska's choice of Row 44 made sense because of the large number of over-sea routes the airline flies to Alaska and Mexico. However, Aircell will have service operating in Canada as a partner to a license winner at some point (this year?).

That, combined with pointing some antennas at over the ocean, might allow reasonably continuous coverage between continental US routes and Alaska. Mexico is another story, but Aircell hopes to have the same deal Verizon Airfone had in Mexico and the Caribbean to allow use of the same spectrum for which it has licenses in the US.

Alaska said in the press release, "To ensure the service is available to the airline's namesake state, Aircell will expand its network to provide Gogo Inflight Internet service on flights to, from and between key destinations in the state of Alaska."

Aircell's Gogo Inflight Internet is on over 700 planes at present. I expect it'll hit about 1,500 planes this year, although the pace of installation could speed up if airlines are happy about uptake and revenue.



Southwest Signs with Row 44Paul McCartney looks to save Abbey Road

Monday, February 22, 2010

Woman Calls To Complain about Loss of Stolen Wi-Fi

Jennifer calls Leo Laporte's Tech Guy radio show to complain her "linksys" has disappeared: She starts by explaining that her "linksys" has gone away, and she bought a USB wireless extender, but it still doesn't show up. Leo asks, wait, do you have a wireless router? No, she's been using this other network.

Leo explains to her that she's stealing, and exposes herself to tremendous risk by being on an open network. "When you see an access point named linksys, it's usually because the person who set it up is kind of clueless," he notes.

I like Leo not compromising on the ethics, while offering security advice, and suggesting she get her own connection.



Paul Weller denies Jam reunionTop Password? 123456