Thursday, December 24, 2009
OLPC unveils slimline tablet PC
By Jonathan Fildes Technology reporter, BBC News |
| |
The group behind the $100 laptop has revealed the design for its latest computer aimed at connecting children in the developing world.
The XO-3, as it is known, is a slim-line touchscreen tablet PC.
One Laptop per Child (OLPC) said it would be "available in 2012" and would cost "well below $100".
The new design replaces the proposed XO-2, a foldable e-book that was first shown off in 2008 but has since been scrapped by the organisation.
The XO-3 will eventually replace the original XO laptop that first went into production in 2007.
The innovative machines, which have been designed for use in remote and harsh environments, were designed for use by school children and featured a sunlight readable display and open source software.
'Bigger appeal'
OLPC originally aimed to sell the low-cost laptops in lots of one million to governments in developing countries for $100 each.
However, the non-profit organisation had difficulty getting governments to commit to bulk orders. The machines - which are able to run both Linux and Microsoft Windows - are now offered in single units and cost around $200.
| The XO-2 has been scrapped in favour of the XO-3 |
So far the XO has been distributed to more than 1.4 million children in 35 countries.
The high-price has not however put off all governments. Uruguay has bought a computer for every one of their school children.
Walter de Brouwer, CEO of OLPC Europe said that these "saturation projects" were the future of the organisation both in the developed and the developing world.
"I'm talking to three four countries in the EU at the moment," he told BBC News. "Once one says yes, the others can't say no."
The organisation believes the new design will cost significantly less.
Mr Brouwer said that because of the pace of technological change and the ever decreasing prices of electronics he could imagine the design selling for "50, 60 or 70 euros".
He said governments could pay this back over a number of years, allowing pupils to have a laptop for less than one euro per month.
"This is very realistic," he said.
The concept shows a touchscreen, a camera, induction charger, and a carrying ring on one of its corners.
Its inner workings - including a chip from UK firm ARM - will come from an interim design - the XO 1.75 - set for launch in 2011.
The 1.75 will merge elements of the current machines with technologies - such as a touchscreen - intended to be included in the XO-3.
OLPC recently said that the organisation would just focus on promoting its concepts and educational aims, rather than manufacturing laptops.
"We are not a laptop company," said Mr Brouwer. "Manufacturing a laptop is not such a big deal. The bigger appeal for us is deploying them and integrating them with education systems to transform a society."
Nicholas Negroponte, founder and chairman of the group, said that he hoped that industry would now copy the design for the XO-3.
Tuesday, December 22, 2009
List of free and open source software packages
From Wikipedia, the free encyclopedia
This is a list of software free to be modified and distributed, for the software free in the monetary sense List of freeware.
This is a list of free and open source software packages: computer software licensed under free software licenses and open source licenses. Software that fits the Free Software Definition may be more appropriately called free software; the GNU project in particular objects to their works being referred to as open source. For more information about the philosophical background for open source software, see free software movement and Open Source Initiative. However, nearly all software meeting the Free Software Definition also meets the Open Source Definition and vice versa. A small fraction of the software that meets either definition is listed here.
Best of Open Source Software Awards 2009
InfoWorld's 2009 Bossies spotlight today's Top 40 open source products for business and IT pros
If you think you can easily whittle down the best open source software to a manageable number, you'll soon discover that you can't do it without a great deal of hair pulling, nail biting, and gnashing of teeth. There are just too many excellent tools. Even if you give up on a "manageable" number and go whole hog -- say, a top 100, which is certainly doable -- you'll still face too many hard decisions and too many arguments. You'll be looking for a way out.
To bring you this year's 40 top open source products -- our 2009 Bossie winners -- we pulled a couple of fast ones. Our first inspired dodge was to come up with the InfoWorld Open Source Hall of Fame. There's a certain number of obviously great open source solutions (we settled on 36) that deserve a hall of fame, and though our annual Bossies selection regularly passed over most of these because of their sheer obviousness, a few inevitably complicated the process. Erecting the hall of fame allowed us to honor these inconvenient legends -- the Linuxes, BSDs, Sendmails, and Snorts -- once and for all.
[ See the slideshows of the 2009 InfoWorld Bossie Award winners: The best of open source developer tools | The best of open source enterprise software | The best of open source networking software | The best of open source platforms and middleware. ]
Our second shortcut was to omit desktop productivity tools and focus strictly on enterprise software, application development tools, networking and network management software, and platforms and middleware. We covered some of the top desktop productivity tools in "The best free open source software for Windows" -- including Linux standards such as OpenOffice.org and Firefox -- but there's so much more to talk about. Once you start down this road, you have to walk a long way.
Thursday, December 17, 2009
php中?(问号)和:(冒号)的作用
C语言里的语法,条件表达式e1?e2:e3,就是一个if语句的缩写,若e1为真(非0),则此表达式的值为e2的值;若为假,则表达式的值为e3。等同于
- $e="";
- if(e1)
- {
- $e=e2;
- }
- else
- {
- $e=e3;
- }
其中e1、e2、e3都是表达式, 如:
$shenhe=$val['available']?"已审核":"未审核"
Free shipping at over 700 online stores today
If you're like many Canadians and haven't started holiday shopping yet, consider taking advantage of free shipping day today at more than 700 online retailers.
All of this year's 726 participants, such as the Apple Store, Lululemon Athletica and The Body Shop, promise delivery by Christmas Eve.
The event began last year to extend the cyber shopping season for merchants and give procrastinators one last chance to order gifts before Dec. 24.
And many Canadians are last minute shoppers. According to a TD First Class Visa Holiday Shopping Survey released today, 38% of us put off our shopping because we're busy while another 11% admit we're lazy when it comes to facing the crowds.
The online promotion has nearly tripled in popularity this year from the just 250 retailers that took part in 2008.
Canadians should read online fine print carefully since certain restrictions may apply to shipping addresses outside of the U.S.
For more information visit www.freeshippingday.com
SocksCap代理使用教程
很多使用SSH的用户都会遇到这样的问题,为什么我已经设置了socks代理,还设置了OpenDNS,怎么还是上不了Facebook,这就涉及到DNS污染技术,需要用户使用远程解析域名的方法才能访问目标网站。
对于Firefox来说,远程解析域名的设置非常简单,只要在about:config修改network.proxy.socks_remote_dns=true就可以了。但对于IE和其他软件来说,就没有类似的修改方法,需要使用一个名为SocksCap的代理软件来解决这个问题。
SocksCap是一个通过Socks代理连接网络的代理服务器第三方支持软件,拥有功能强大的Socks调度,所有Windows应用(如IE、Firefox、QQ、FTP等)都可以使用这个Socks代理工具通过Socks代理服务器上网,即使不支持Socks代理的应用也可以用Socks代理上网。
首先下载安装SocksCap,安装结束后,运行SocksCap,出现如下图所示界面,这时候需要进行一些配置工作,选择菜单File - Settings。
在Socks Server中填入Socks代理的IP地址:127.0.0.1,在Port项中填入代理端口:1080;Protocol选择Socks5项,选中Resolve all names remot,点击"确定"。
接下来要做的便是把应用程序加入到SocksCap中。点File - New选项就可以出现如下图窗口。
点Browse浏览选择应用程序,如IE等应用的EXE文件,其他选择默认,点"OK"就可以完成配置。
更简便的操作方法是将应用程序的快捷图标拖入主窗口中既可,然后鼠标右键会显示"New application profile",给这个应用命名,然后给出要运行的程序和工作目录,点"OK"设置生效。
这时候的SocksCap主界面会如下图所示,列出一系列应用程序的图标。
双击SocksCap主界面的应用程序图标,即可通过SocksCap运行应用程序。若双击桌面上的应用程序,则为不使用代理运行程序。
总体来说,SocksCap代理的目的是把一些不支持socks的代理的软件在进行网络通信的时候的数据全部转化成socks代理数据,然后再通过代理出去。对于IE来说,不需要在IE里面做任何配置,只要从SocksCap中运行IE就可以支持Socks代理。
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