[Year 12 IT Apps] Transmission speeds

[Laurie Savage]

Are we barking up the wrong tree? Should we instead be thinking of the
mass-equivalence of data based on the data stored per gram of magnetic
tape, or paper ticker tape?

Laurie

Laurie Savage

On 16 March 2015 at 13:42, Mark <mark at vceit.com> wrote:

> Thanks, Ken.
>
> I've just finished reading an autobio of Google employee #58, who recalled
> the infinite bandwidth superiority of a carload of hard disks compared with
> any other medium of the day.
> Maybe fibre optic cable (FOC) is catching up.
>
> 1Pb would equal about twenty 6TB hard disks. (I think 6TB is about the
> biggest current hard disk capacity.)
> At about 650g each, 1 second of FOC bandwidth on 20 big disks would weigh
> about 13kg.
> A carload (four fat men with suitcases) would be about 600kg - so a car
> could carry maybe 46 seconds of FOC data transmission.
> Forty-six seconds would probably get the car of fat men to the end of the
> driveway.
> Over 52km at 100kmh, the car would take at least 30 minutes to reach its
> destination, by which time the FOC could have delivered 36,000 disks.
>
> That's 643 GMockB (gigamockingbirds)!
>
> Now I start wondering how long it would take European (or African)
> swallows to convey 643 GMockB of data...
> I sense a thesis coming on. Or at least a best-selling children's book.
>
> Cheers
> Mark
>
> On 16 March 2015 at 13:03, ken price <kenjprice at gmail.com> wrote:
>
>> Thanks Mark
>>
>> https://www.youtube.com/watch?v=ci2bFFGM8T8
>>
>> Hungry Beast tested three methods of data transmission from a NSW town
>> into Sydney (700MB of Marx Bros comedy Duck Soup):
>>
>>
>>    - broadband
>>    - car
>>    - carrier pigeon
>>
>>
>> Apart from one f-word it's good student viewing.
>>
>> Pigeon won, easily. Mockingbird and Duck unavailable for comment.
>>
>>
>> See also http://en.wikipedia.org/wiki/IP_over_Avian_Carriers
>> kp
>>
>>
>> On Mon, Mar 16, 2015 at 12:50 PM, Mark <mark at vceit.com> wrote:
>>
>>> Hi, holiday-anticipators.
>>>
>>> While researching network communication speeds (for a children's book
>>> I'm writing) I discovered a fascinating nugget of knowledge.
>>>
>>> In 2012 a record speed was set for bandwidth over a twelve-fibre optic
>>> cable: 1.05 Petabits per second over 52 km.
>>>
>>> My arithmetic has never been great, but I calculated that it equates to
>>> 122,245 high definition movies (1GB each) per second. One second's
>>> transmission over that cable would take about 14 years nonstop viewing to
>>> watch.
>>>
>>> This compares to CAT6 cable's 1Gbps, which equates to about 190 copies
>>> of "To Kill A Mockingbird" per second.
>>>
>>> I've written to the IEEE proposing the Mockingbird as a new unit of
>>> bandwidth. I have not heard back from them yet, but I'm quietly hopeful.
>>>
>>> BTW, did you know Harper Lee is publishing the sequel to TKAM this year?
>>> "Go Set A Watchman
>>> <http://www.amazon.com/Go-Set-Watchman-Harper-Lee/dp/0062409859/ref=sr_1_1?ie=UTF8&qid=1426470123&sr=8-1&keywords=go+set+a+watchman>"
>>> is due for release in 4 months.
>>>
>>> --
>>>
>>> *"Build a man a fire, and he'll be warm for a day. Set a man on fire,
>>> and he'll be warm for the rest of his life." - Terry Pratchett*
>>>
>>> Mark Kelly
>>> mark AT vceit DOT com
>>> http://vceit.com
>>>
>>>
>>>
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>
>
>
> --
>
> Pedantic?* Whom, I??*
>
> Mark Kelly
> mark AT vceit DOT com
> http://vceit.com
>
>
>
> _______________________________________________
> http://www.edulists.com.au - FAQ, resources, subscribe, unsubscribe
> IT Applications Mailing List kindly supported by
> http://www.vcaa.vic.edu.au/vce/studies/infotech/itapplications3-4.html -
> Victorian Curriculum and Assessment Authority <br>
> http://www.vitta.org.au  - VITTA Victorian Information Technology
> Teachers Association Inc <br>
> http://www.swinburne.edu.au/ict/schools - Swinburne University
>
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