世界前25大上市公司十年变迁 : 弯曲评论www.tektalk.cn » 车东's shared items in Google Reader

下表是世界25大上市公司十年比较:

排名公司(1999年)市值(1999年)(亿美元)公司(2009年)市值(2009年)(亿美元)
1微软6024Exxon Mobile3228
2GE5072工商银行(中国)2670
3NTT DoCoMo(日本)3684微软2628
4思科3665中国石油(中国)2169
5沃尔玛3079沃尔玛2010
6英特尔2750BHP Billiton(澳大利亚)2005
7Exxon Mobile2789汇丰银行(英国)1922
8NTT(日本)2726建设银行(中国)1916
9朗讯2351谷歌1884
10诺基亚(芬兰)2082巴西石油(巴西)1816
11德国电信(德国)1954中国移动(中国)1814
12英国石油(英国)1954壳牌石油(荷兰)1812
13IBM1945宝洁1799
14花旗银行1878Johnson & Johnson1779
15丰田(日本)1822英国石油(英国)1739
16时代华纳1696苹果1728
17AIG1674雀巢(瑞士)1710
18AT&T,Inc1663GE1681
19AT&T Corp1624IBM1674
20Oracle1595摩根大通1653
21家得宝1583AT&T1606
22Merck1570Chevron1540
23Worldcom1506Roche(瑞士)1437
24宝洁1440Berkshire Hathaway1536
25可口可乐1439辉瑞制药1470
17:41 我的网站上有“危险警告”?我想我的网站被黑了! » Google(谷歌)中文网站站长博客
原文GENERIC CIALIS on my website? I think my site has been hacked!

如何使用“像Googlebot一样抓取

网站站长级别:中级

你的网站遇到过突然被索引排除在外或从搜索结果中神秘消失的情况吗?你遇到过被告知说你的网站正在使用cloaking 技术吗?不幸的是,这有可能是恶意黑客向你的网站发起攻击:他们绕过安全系统,在你的网站中插入恶意内容。熟练的攻击者还会伪装这种垃圾或危险内容,让一般用户无法察觉。然而,Googlebot却能识别,从而对你网站的谷歌搜索结果造成负面影响。

过去遇到这种情况的时候,往往很难发现问题的症结所在,因为网站在用户看来很正常。也许只有利用Googlebot的用户代理(User-agent)、使用来自Googlebot IP的请求,才能看到隐藏的内容。但现在,这些问题已不复存在:利用网站站长工具(Webmaster Tools)中的新的实验室功能——Googlebot一样抓取,你就可以清楚看到Googlebot所看到的内容,任何类型的伪装都无所遁形。下面,我们将向你展示如何使用这项功能:

我们假设,某个网站的站长在搜索他的网站在搜索他的网站时发现他的网站的标题和snippet 在搜索结果中展示的是完全无关的信息。令他感到奇怪的是他查看网站的源代码后发现没有问题。这个站长非常惊讶地收到谷歌的通知,通知警告他的网站不符合谷歌的质量要求。那么他应该怎么办呢?我们以Google(谷歌)中文网站站长官方博客为例,来告诉大家遇到这种情况应该怎么办。


首先,登入网站站长工具中,“像Googlebot一样抓取功能就会出现在实验室版块的导航菜单的最下方:



网页中会包含一个域,你可以在其中插入要抓取的URL。或者你也可以什么都不填,让它抓取主页。



点击抓取,然后等待几秒钟。刷新网页后,就能看到请求抓取的状态。如果成功,他可以点击成功链接


之后就会显示带有被抓取网页内容的详细信息:


如果你的网站被黑了,就会显示有垃圾内容!

确定网站已经遭到黑客攻击(很可能仍在遭受黑客攻击)是重要的一步。然而,这只是开始。为了获得更多信息,我们强烈建议向你的服务器管理员或托管方求助,并阅读我们之前关于被黑网站的博文:

如果你对如何使用“Googlebot一样抓取”功能存有疑问,请访问网站管理员帮助论坛。如果你觉得你的网站可能被黑,但找不到解决的方法,你可以通过我们的意软件及黑客攻击”专版咨询专家。

另:请记住,一旦你将网站上的黑客内容清除后,我们一般仍需要花时间来更新我们的搜索结果。由于多种因素都会影响到爬虫抓取,所以很遗憾我们无法提供准确的更新时间。
What’s Missing from the Apple iPad?Mashable | The Social Media Guide » 车东's shared items in Google Reader

Now that we know what the Apple iPad does do, and the lingering effects of the Steve Jobs Reality Distortion Field are starting to wear off a bit, let’s take a closer look at exactly what the iPad doesn’t do.

It does usher in a new computing form factor (or rather, revives it) — but it’s a space that will be awfully crowded in short order. Should you rush in to pick up the Apple-flavored tablet, or are there reasons to consider waiting for the series of devices that are sure to follow? For now, a quick look at what’s missing in the iPad version 1.0 might help decide the balance of your bank account at the end of March.


No Multi-tasking


Running iPhone OS 3.2 means that, at least for now, the iPad is shaping up to be a “one trick at a time” kind of pony. Of course, it’s entirely possible if not probable that Apple will correct this down the line in a forthcoming version of the iPhone OS — maybe even before the tablet ships — but as it currently stands the lack of multi-tasking could be a deal-breaker for some.


No Drag and Drop File Management


Another carryover from the iPhone ecosystem — and not a favorable one, in my humble opinion — is the requirement of syncing your iPad with another computer as the primary content management system for the device. Assuming it works the same way as your iPod or iPhone do now, you’ll only be able to associate your iPad with a single other device — and that’s a dealbreaker for a growing number of households that have media strewn across several computers, hard drives, network attached storage units, and beyond.


You’ll be downloading content from the web and through the iTunes content store directly from the device, of course, but what about that set of files just brought home from work, or that collection of videos I want to dredge out from an old backup drive. In order to get them over to the iPad I’d have to first dump them into iTunes, then perform a sync operation — instead of being able to simply drag and drop them over Wi-Fi or simply hook them in via USB Mass Storage (a great standard that’s been around forever!). There are third-party iPhone apps that allow file transfer via Wi-Fi, but how many steps are we needlessly adding to a process that was uncomplicated by USB Mass Storage years ago?


No USB Port


The iPad will sync itself via USB — but only when plugged in via its proprietary dock connector. That means there will be no direct attachment of all umpteen USB peripherals you already own. It even means you won’t be able to plug in an external USB keyboard you already own without buying a separate USB adapter.

Yes, you’ll be able to pick up an us-yet-unpriced “iPad Camera Connection” kit that will give you the ability to pull photos off your USB-enabled camera. It remains to be seen though if the adapter-provided USB port will even allow you to hook in other peripherals (mouse? keyboard?) or attach external media in the form of USB hard drives or thumb drives.


No SD Slot


Speaking of storage: 16, 32, or 64GB is all you get — precisely because there’s neither a USB nor an SD card reader built directly into the iPad. That means you can’t stick a 16GB SD card in as a semi-permanent storage expansion option or pull files off an SD card without purchasing the aforementioned iPad Camera Connection Kit. Not only is that extra money out of your pocket, but it’s another proprietary dongle to cart around with you (and lose… repeatedly).


No Flash



The above shot taken from Apple’s presentation (hat tip: Engadget) demonstrates quite clearly another big omission from the iPad: support for Adobe Flash. It’s bad enough on the iPhone, but imagine loading up a nice video link on the iPad only to have it… simply not play.

We know Apple dislikes their lack of control over the whole Flash ecosystem, and that Flash is the leading cause of crashes on OS X. We can also prognosticate that Apple is hoping that HTML5 will take off quickly and start to disintermediate Flash as the primary technology powering video playback on the web.

Still, YouTube just announced their HTML5 player last week. It’s getting out there, but it’s the early days for widespread HTML5 support. It’s doubtful it will be in a position two short months from now to completely replace the Flash experience for web video, leaving a lot of ugly “plug-in missing” boxes to make an appearance on one’s expensive iPad tablet.


No HDMI Out


Speaking of video, there’s no handy, single-cable way to hook up an iPad to your TV set. Of course, this should have come as no surprise knowing Apple’s reluctance to support HDMI in any of its other products. Still, for a device that strongly hinted at being perfect for your living room, it would be nice to have the option to quickly hook it up for a big screen video experience.

Even to get video out at all, you’ll need a proprietary Dock to VGA adapter, which obviously limits you to VGA resolutions — there’s not even a DisplayPort out option, which Apple has been touting as a great alternative to HDMI. You’ll be able to pull up to 576p out with an (again, proprietary) Apple Composite A/V Cable — but this is composite video we’re talking here. Not HDMI, not component, not even S-video. The only upside to that is that, as the lowest common denominator just above a coaxial connection, your TV from the early 90s will probably at least have this type of connector.


No 1080p Playback


And while we’re railing on the subject of video, it’s worth mentioning there will be no full HD playback (much less output) from the iPad. Given that 720p is pretty darn close enough (especially for a 9.7-inch screen), it’s more the annoying fact that if you have a growing library of 1080p video files you’ll most likely be unable to play them back without some sort of conversion step first (it’s possible certain formats and codecs could be natively downsampled, but it will remain to be seen how it will shake out in practical usage).

To be fair, it’s definitely a minor point considering the paucity of true 1080p content out there — but it definitely feels like an odd backwards step in a video trajectory that should be trending towards full HD, not away from it.


No Native Widescreen


Okay, just one more gripe about the display aspect of the iPad and then we’re done on this track, we promise.

The tablet’s resolution tops out at 1024 x 768, which falls into the 4:3 standard definition range and not the glorious, widescreen 16:9 high definition aspect ratio we’ve come to know and love. In fact, we’ve come to know and love it via Apple, who has been touting HD as the second coming for several years now. Remember when 2005 was “the Year of High Definition Video?” So then why, pray tell, is 2010 suddenly the Year of Composite Out?


No Camera


Really, no camera? Like, not even at all? Yep, there is no camera on the iPad. It was mystifying enough on the iPod touch, but to omit the camera here is a curious thing. That means no video iChat, no Skype video conferencing, no quickly snapping a pic of whatever and uploading it to Flickr/Facebook/Picasa/etc.

The iPad is clearly a device centered around media consumption, not creation.


No Full GPS



The Wi-Fi-only versions flat out have no GPS support whatsoever. The 3G versions have Assisted GPS, which makes use of the cellular connection to help pinpoint your location. The upside of Assisted GPS is it still tends to be fairly accurate — the downsides are there’s no absolute standard regarding what functions Assisted GPS will support to the end user, and you almost surely need an active cell connection to get your positioning information. That means if you stop paying for the mobile data service, or are in a dead zone or other area of poor connectivity, your GPS is probably kaput as well.


No Open SDK


This one isn’t really a shocker either, considering Apple does it every time, but the brand spanking new Software Development Kit for iPhone OS 3.2 — which, despite the name, is the operating system the iPad runs on — requires developers to sign a Non-Disclosure Agreement (NDA) before getting access.

That means programmers working on applications for the device can’t talk about the platform to outsiders who have not also signed the NDA. The nature of the Internets means that some information will undoubtedly leak out, but the veil of secrecy Apple wants to enforce surrounding the iPad developer platform runs counter to the open information sharing of ecosystems like Twitter, for example.


Conclusion


To be fair, it would have been almost impossible for the actual iPad device announced today to live up to the insanely hyped idea of an Apple Tablet that consumed the Internet’s attention in the weeks (if not months) leading up to today’s event. There are also many positives that are hard to deny about the iPad, not the least of which is its characteristically drop-dead gorgeous design aesthetic.

Nevertheless, before this thing wins your hard-earned dough, make sure you know what its limitations are. Let us know if we’ve missed any points here, and what your take on the Apple iPad is as a whole in the comments.

[img credits: gdgt, Engadget]


Reviews: Facebook, Flickr, Picasa, Skype, Twitter

Tags: 1080p, apple, Apple Tablet, HDMI, ipad, NDA, SDK, tablets, usb

中国哲学体系的困惑王建硕 » 车东's shared items in Google Reader

中国古代的智慧,经过千年,现在依然可以用“子曰”什么什么,或者“俗话说”什么什么的来对我们周边的现象进行解释。但一直没有用一种严密的逻辑推理来帮助我们做判断。俗语里面的正确的事情,基本上都是成双成对的以反义词的方式出现的。这么做,也有道理;不这么做,有另外的道理。事后诸葛亮的情形居多,锦囊妙计类型的比较罕见。

比如对于坚持一事,有人说坚持就是胜利;立刻就会有人说,退一步海阔天空。对于失败,有人说,面对失败没有关系,只要接着去做,失败乃成功之母嘛。“我来给你举个例子,某某某在经历了100次失败后,在101次,就成功了。”也有人说,这叫钻牛角尖,这叫不到黄河不死心,这叫。。。。如果我们看语言中的词,也是同义词中间就有褒义词说法,也有贬义词说法:赞扬,吹捧;果断,武断。

任何事物或者行为,都有好处A和坏处B。看似有道理的道理总是仅仅告诉我好处A,却从不谈坏处B;对于恶行,也只告诉我们B,却忽略了A。这就让我们觉得只要是道理,都很有道理,却对于做决定没有太大裨益。

先人们只告诉了我们道理,却缺少系统的推理来告诉我们,在具体的情况下应该应用哪一条美德。比如,在一个人做一件事情已经失败了三万次了,到底应该“坚持到底就是胜利”呢,还是“退一步海阔天空”呢?给定的信息下做同一个决定,到底是果断,还是武断呢?

“炒股的要义,就是低买高卖。你看啊,老张10块钱买,15块卖,赚了;老李,19块钱的时候,别人都说不要买,结果他买了,你看现在,涨到30块卖了。你要向他们学习啊!”

这些真理一样的道理,实实在在的传奇故事,都没有解决一个问题:怎么知道现在是高点还是低点呢?

你告诉我某A坚持读完大学,成了伟人;某B,大三辍学,成了伟人。但对于我,到底度还是不读下去呢?应该学A还是B呢?就没有人能够说清楚了。

因为没有设定具体场景,多少年以来,美德A以及和它相反美德B,从来没有正面的争个高下来,好像京剧里的《三岔口》,黑灯瞎火的摸了半天,谁都没有碰到谁,却分别井水不犯喝水的传承了千年。

对于近代的西方哲学发展,我觉得有些我们可以借鉴的地方。他通过设定一个有一个场景,逼得哲学家对此进行确定的回答。有点像哲学里的物理实验。在参数固定的情况下,追求一个固定的结果。比如在关于道义的讨论中,有一个争论百年的经典问题:

刹车失灵的火车在轨道上眼看就要撞死5个工人,另外一个轨道上有一个人。作为火车司机的你,会不会把火车扳到只有一个人的铁轨上?
这个给定的场景逼得每一个哲学家回答“扳还是不扳”这样确定的答案。对此,实用主义者,绝对主义者,义务论者,结果主义者,自由意志主义者等等不同的学说,给出不同的答案,或者给出相同的答案,却是因为不同的原因。在此基础上,反对者针锋相对的再次举出另外一个场景,将对方的学说的推论过程应用其中并且产生一个荒谬的结果,并进行改良。如此往复前进。每一个参与者都站在前人的肩膀上往前走一步,正如物理学,天文学或者化学等学科那样。

希望我们能够在一个宽松的环境下面,认真的坐下来,不高谈什么事应该做的,而是多一些固定场景的较真的讨论,进行逻辑上严格的推导。道理,怎么讲都行,而决定,是非此即彼的。

原文:http://home.wangjianshuo.com/cn/20100127_aeaecc.htm

03:50 最实用的Web服务器架构书:这本书中介绍的架构应该可以适用5年 (评论: 实战Nginx:取代Apache的高性能Web服务器) » 车东@豆瓣 的最新评论
车东@豆瓣评论: 实战Nginx:取代Apache的高性能Web服务器
评价: 力荐

书还没看,但我看过张宴博客 http://blog.s135.com/ 并且向出版社推荐了张宴。Nginx是否能比Apache超出10倍要看具体的应用环境,但是比Apache效率高是一定的。按照我的理解: 这本书中介绍的架构应该可以适用5年;...

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