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Inside One Laptop per Child: Episode 02

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Subido el 10 de octubre de 2007 por EducaMadrid

889 visualizaciones

Episode 02 of this series documenting the One Laptop per Child project focuses on the activities built for the laptop. Activities, not applications, since the machine is designed for children and applications is a decidedly adult word.

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The mesh network allows you to connect each of the laptops together without having to 00:00:00
have a server in between, and this sort of frees them up to talk to each other without 00:00:19
having to have complex hardware or expensive hardware. 00:00:25
Okay, it's a wireless network, but it's different from your normal wireless network in the sense 00:00:30
that every node, that is, every computer, can also route the traffic from other computers 00:00:36
to get to an access point or a mesh portal in this case. 00:00:42
My name is Miguel Angel Alvarez, and I'm an engineer here at the OLC. 00:00:47
Usually you have one access point in the middle, and everyone will connect directly to the 00:00:52
access point. 00:01:00
And when you have a mesh network, you can have another one farther off, who connects 00:01:01
to the internet or to the access point or to the server through the intermediate node. 00:01:06
Each laptop has a range, and so you can think of it like clouds. 00:01:11
If each laptop has a small cloud around it, when the clouds intersect, they're meshed, 00:01:14
and you can actually, you know, that makes the entire mesh bigger as you keep adding 00:01:19
more laptops. 00:01:22
And, you know, I mean, this might be, in the case of wireless networking, this might be 00:01:23
300 feet. 00:01:28
Most laptops don't have the ability to dynamically mesh, and so what happens is that if you're 00:01:31
over here, you can't actually access anything, you know, you can't get anywhere. 00:01:35
But with the mesh networking, that actually dynamically extends the range, and so as long 00:01:41
as somebody is between you and the access point of the mesh, you know, which happens 00:01:47
to be school most of the time, then you'll have an internet connection because it can 00:01:53
hop from computer to computer, laptop to laptop to get to the school. 00:01:57
Whether or not there is an internet portal of any kind, the computers can talk to each 00:02:01
other and can collaborate and can execute applications together. 00:02:06
I mean, you can imagine with games that there's a really good possibility to use this because 00:02:10
right now, I mean, there are a lot of network games, but they depend on a server. 00:02:15
And potentially, you know, what you can do is you can just start up a random game and 00:02:20
somebody else can join. 00:02:24
You can invite them to that game, and they can play. 00:02:25
It's really independent of, you know, any of the infrastructure that you might need. 00:02:27
Two kids with laptops sitting under a tree, you could play Kinect 4. 00:02:31
It's a little bit harder in today's computer, and most people don't even think about these 00:02:34
sorts of things when they're making games today. 00:02:37
The hardware is integrated into the main board. 00:02:40
There is a chip which takes care of all network-related stuff, and the antenna, they only serve as 00:02:41
physical gain elements so that you get a little bit better signal-to-noise radio. 00:02:48
The good thing is normally antennas are built behind the screen, and they have some interference 00:02:53
because there is a lot of electric activity going around. 00:02:57
And in this case, we have separated a little bit the antennas from the rest of the computer 00:03:00
so that they are better insulated and they have less noise from other electric components. 00:03:04
And that's beneficial for the whole connection. 00:03:09
Normally, what happens is that there is a mesh view in the interface that shows who 00:03:11
others are present in the mesh network at any given moment. 00:03:17
And in that way, you can either talk to them directly or initiate an activity or share 00:03:21
an activity with them. 00:03:27
And in that way, you can, for example, browse the internet together. 00:03:29
You can both see the same pages and comment what you're seeing, or you can draw a picture 00:03:33
together. 00:03:37
So I downloaded the e-book, Little Women, on this machine, and I shared the activity 00:03:38
by clicking on the share button in the toolbar. 00:03:44
And over on this laptop, it popped up in the mesh view. 00:03:48
So I clicked on it in the mesh view, and that starts up the same instance, a shared instance 00:03:52
of the read activity, which automatically downloads the e-book from this computer to 00:03:57
that computer. 00:04:02
And so both of these laptops right now are reading the e-book, Little Women. 00:04:04
You know, you could highlight things, and that would show up in the other person's document 00:04:08
like, hey, take a look at this. 00:04:12
We also want to do annotations as well, just kind of like leave a little post-it in the 00:04:14
document for the other person as well. 00:04:18
You have to make a mesh which is both more robust and easier to configure, to access, 00:04:20
and to get away from, because the users are going to be children in the end, and they 00:04:27
have to have access to this automatically without having to configure it, without having 00:04:30
to figure out how to connect with one or how to connect with the other, only seeing other 00:04:34
users and being able to interact with them. 00:04:39
And that's one of the things we want. 00:04:41
We don't want them just using the computer so that they can use technology. 00:04:42
We want them to use this computer so that they can become social with each other and 00:04:46
collaborate with each other. 00:04:50
Okay. 00:05:00
Great. 00:05:01
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Idioma/s:
en
Autor/es:
One Laptop per Child Initiative
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
889
Fecha:
10 de octubre de 2007 - 11:57
Visibilidad:
Público
Enlace Relacionado:
One Laptop per Child Foundation
Duración:
05′ 07″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
11.92 MBytes

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