Luyi Chen’s blog

稍微用了一下Google Wave。目前主要觉得有两点：

1) 分布式数据结构。别人和你分享一个Wave，你看到的是一个本地副本。你可以删除这个Wave，但不会影响其它参与者的版本。相反你更新这个Wave，所有的参与者都会得到更新。你删除这个Wave后，该Wave更新，你会得到更新后的版本。

想要不再看到一个Wave，目前只能用Mute。删除自己作为参与者的身份的功能据说还没有开放。同样现在也不支持删除其他参与者。

这个特性使Wave看上去很像一个分布式版本控制系统，类似于Git。

2) 双向性。在gmail里看一封email，或者在Google Reader里看一篇网志，都是单向内容，不能对来源再发生影响。对本地的Wave修改内容可以被反向传递。那个发送邀请的Wave就是一个例子。所谓的发送邀请，实际就是修改本地的一个Wave，而不是通过任何的http form传递数据。这一点还有待进一步观察。

所以，这样看来Wave主要是定义了一个新的数据结构。在Wave系统里面，任何东西都是一个Wave。

I just found a new feature in Google Notebook, that you can find deleted notes in trash. When you delete something, it will show a line of highlighted text inform you the trash folder. The style is quite gmail way. Stuffs in trash folder will be purged in 30 days. As long as the speed is acceptable, I am now using this as my main notebook.

Beta news:

Google’s new brand name in China will be “Gu Ge,” Chinese for “valley song.” The company said it picked the name to allude to a rewarding experience, adding that it draws on Chinese tradition.

According to this page, Gmail chat only works under http currently, although it will support https going forward. That’s why I never saw this feature tuned on in my account.

update: It’s available over https now.

This article on Google’s newsletter for librarians gives a well explanation on how google collects and ranks articles. You may think that you know PageRank well. But I promise you will find something new in this article. The best part I like is this exercise, for more details you should refer to the article:

Now tape those documents on a wall, step back a few feet, and squint your eyes. If you didn’t know what the rest of a page said, and could only judge by the colored words, which document do you think would be most relevant? Is there anything that would make a document look more relevant to you?

This shows you how important a good title is. Take a look at your page source. What’s in your title and h1 element. Are they relevent to your article?

Most websites put a static site name in the title of every page. Just think about how many times, you should modify the description area when you tag a page to online bookmarks. This shortage in page design not only annoys taggers, but also shows less importance to Google.

So I have something to do with my site now. Hehe!

Now you can search in Google Scholar and get direct access to some online resources in National Library of China. Here is how to do:

1. Go to Google Scholar, select search preference
2. In the section for add library, you search for China
3. And there is only one result, which is National Library of China.

You are done. I did some try, but cannot trigger result from NL of China. Maybe the resources they provide is not within my field.