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How long would the filters last?

There are ceramic filters that can be baked to burn the soot collected. If I were to build this, it's what I would use. No point cleaning up pollution by creating even more pollution.

Wrong again. Apple is not #5

In total sells its number #2.

https://cdn.ampproject.org/ii/...

And do you really think that every phone that Samsung sells including the cheap $50 phones uses gorilla glass?

https://www.corning.com/gorill...

Making a car is not "harder" they don't have to do it mass quantities and they can devote man hours and thousands of dollars to each car. Doing something repeatable and at scale is harder.

If the equipment/personnel is there to run one cable, then why not run 2, or 3 or more.

Also one cable can have hundreds of fibers. For example, this one has 432 fibers.

Corning's Gorilla Glass 4 press release says 'up to two times'.

According to some half-assed googling, it looks like a Mohs hardness of 9 (Sapphire) roughly corrosponds to a vicker's scale rating of 2035.
Contrast that to Gorilla Glass's listed 622 - 701, and there's a drastic difference in hardness that actually places gorilla glass around a 5-6 on the Mohs scale.

Interestingly, Gorilla glass 3 even lists a LOWER Vicker's rating, citing only 534-639.
Hardness does not always = scratch resistance apparently. The Gorilla glass 3 resists scratches a very different way.....

citations
http://www.cidraprecisionservi... - Mohs conversions
http://www.corning.com/docs/sp... - gorilla glass info sheet
http://317d462d97c0f60cc4a8-f8... = gorilla glass 3 info sheet

For some place that's supposed to be for nerds who, unlike me, finished college, this discussion is embarrassing. Parent post and 1 or 2 other posts have it right, and this is something that every radio guy knows as well.

Wikipedia references: http://en.wikipedia.org/wiki/Velocity_factor
More general discussion with heavy math: http://en.wikipedia.org/wiki/Group_velocity
The reason for it all: http://en.wikipedia.org/wiki/Refractive_index
This is straight from the horse's mouth: http://www.corning.com/WorkArea/downloadasset.aspx?id=39403

They're just made of a more fragile material.

It's not very fragile.

-jcr

So, perhaps this is user error - for not putting an adequate case on 'em.

The problem is Apple recently removed full cover cases for the iphone 4 as apple engineers recently discovered if dirt or grit gets stuck between the protective case and the back of the phone the glass on the back has an increased probability of cracking. So with antenna-gate just starting to cool we now have case-gate were it doesn't matter how you hold the iphone 4 it breaks. You would think Apple would use gorilla glass like many brands including dell with do with their recent full screen mobile handsets. Well I am sorry to inform you Apple just used generic hardened glass on the back and the front to save a few bucks having to pay Dow Corning a license fee.

I found an app note on this: (But I don't work for Corning) http://ccswebapps.corning.com/web/library/AENOTES.NSF/$ALL/AEN023/$FILE/AEN023.pdf

Then again, Corning has apparently dusted off its Gorilla Glass product, originally developed in the 1960s, to make ultra-strong glass for displays. This video shows, among other things, a thin sheet of the stuff taking a Wiimote at 65mph, and a baseball at 55mph with no damage.

Then again, Corning has apparently dusted off its Gorilla Glass product, originally developed in the 1960s, to make ultra-strong glass for displays. This video shows, among other things, a thin sheet of the stuff taking a Wiimote at 65mph, and a baseball at 55mph with no damage.

Have you ever heard of Gorilla® Glass?

IIRC the screen of that phone is actually made of Gorilla Glass, which is pretty impressively tough stuff. Obviously not tough enough for British journalists mixed with a sharp metal corner...

It is recommended by that you use an armored cable. http://catalog2.corning.com/CorningCableSystems/catalog/ProductDetails.aspx?cid=Gel-Free(CcsNaftaPdfCatalog)&pid=ALTOS%20Armor(CcsNaftaPdfCatalog) or http://catalog2.corning.com/CorningCableSystems/catalog/ProductDetails.aspx?cid=Tight%20Buffered%20-%20Indoor(CcsNaftaPdfCatalog)&pid=MIC%20Riser%20with%20Interlocking%20Armor(CcsNaftaPdfCatalog)

It is recommended by that you use an armored cable. http://catalog2.corning.com/CorningCableSystems/catalog/ProductDetails.aspx?cid=Gel-Free(CcsNaftaPdfCatalog)&pid=ALTOS%20Armor(CcsNaftaPdfCatalog) or http://catalog2.corning.com/CorningCableSystems/catalog/ProductDetails.aspx?cid=Tight%20Buffered%20-%20Indoor(CcsNaftaPdfCatalog)&pid=MIC%20Riser%20with%20Interlocking%20Armor(CcsNaftaPdfCatalog)

Corning (division of Pyrex and one of the main glass fiber optic manufacturers) already announced their flexible glass fiber optic shielded with nanostructures back in July. http://www.corning.com/media_center/press_releases/2007/2007072301.aspx

Yes, this is would be a good argument if it was based on fact.

Here is a detailed discussion regarding TDI emissions: here

We don't have anyone to blame for these emissions except ourselves and our elected government. The fact is most of these emissions are due to the exceedingly crappy refining standards for diesel fuels in the US. Fuel quality is far higher in Europe where impurities are all far lower since they've been removed from the fuel before they arrive at the pump. Sure, this may not change your mind and you may be tempted to dismiss the thought but we all breathe in the emissions from heavy trucks that use diesel. What kind of diesel emissions do you want to breathe in?

If that doesn't turn your crank, how about using biodiesel in your TDI: requires no conversion, just the challenge of finding a pump. But that's worth it right? Or is saving the environment only interesting if its also easy? Biodiesel is now commercially available in major metro areas, you just have to find it.

Mechanical Engineering's Take on Diesel
Note where VW has to import Euro Diesel to showcase its cars in the US
VW's take
A whole whack of info on the future of [bio]diesel

I work for Corning Cable Systems, and we've been making this kind of cable for awhile. It's called "optical ground wire," or OPGW for short. The Europeans have installed lots; there's less here in the US. Though this particular deployment in California may not go up until 2003, you can go out and buy OPGW right now. Other questions answered: Yes, you can push many gigabits per second (Gb/s) down a single fiber. Telcos commonly run 16 Gb/s, 40 Gb/s, or more. Optical fiber is made of glass and therefore doesn't conduct electricity. The outside diameter of a standard fiber is 125 microns, which is about as thick as a hair and definitely thinner than common steel wires. A fiber does indeed have greater tensile strength than a steel wire of the same size.

Recently, Corning, Inc. (mentioned in Fairley's article) announced that they will increase production at their Erwin, NY facility... by 700 jobs and $50 million. Read the press release here. Corning expects their photonics division to increase

One personal connection for me is that this plant is literally just down the street from my summer job.

Recently, Corning, Inc. (mentioned in Fairley's article) announced that they will increase production at their Erwin, NY facility... by 700 jobs and $50 million. Read the press release here. Corning expects their photonics division to increase

One personal connection for me is that this plant is literally just down the street from my summer job.

Qwest has their fiber-optic lines setup so you don't need to dig them up to replace them. They just yank them out of the conduit. They have 2 conduits set up, one is full right now, the other is empty (if I recall), so they can string the fiber in it, with no digging up the lines.

Older companies like AT&T have to do more work to redo their fiber lines.

BTW, a post further down the line here there is a post which implies that Lucent makes fiber-optic lines for sale. I know they do optical research, but Corning makes the majority of the optical lines sold. Corning's symbol is GLW for interested investors.