First Post：Informal Discussion on Social Media

I am really interested in social network, so I 'm willing to learn more about it apart from using the social network products.That is the reason why I choose this lesson. As my first post, I just want to talk about my understanding about social network and some other things that I want to share with you.

Six degrees of separation

Everyone and everything is six or fewer steps away, by way of introduction, from any other person in the world, so that a chain of "a friend of a friend" statements can be made to connect any two people in a maximum of six steps.

I've heard about it very long time ago.Is that means we can get in contact with anyone we want? I was shocked by this, but never had a chance to confirm it personally.However,this Theory has already been applied on the Internet among Facebook, LinkedIn, etc.According to the calculation developed by Facebook,the average separation for all users of the application is 5.73 degrees.It seems that the world became smaller and people got closer with each other.

Evaporative Cooling Effect 

Have you felt tired and bored when you opened a certain social network website?Wait, that’s what this has become?Then you just want to leave this online community.That's what exactly happened to RenRen now.Even some popular website such as Facebook,Twitter,Quora,Sina Weibo are losing some users with high quality contents.

Evaporative Cooling Effect describes a particular phenomena of group dynamics. It occurs when the most high value contributors to a community realize that the community is no longer serving their needs any more and so therefore, leave. When that happens, it drops the general quality of the community down such that the next most high value contributors now find the community underwhelming. Each layer of disappearances slowly reduces the average quality of the group until such a point that you reach the people who are so unskilled-and-unaware of it that they’re unable to tell that they’re part of a mediocre group.

In my opinion,social circle is not the bigger the better,but the one just suitable for you.I don't want to see any useless information. The advertisement,complaints and false news are totally a waist of time.In fact,the online social network doesn't equal reality.Although you can see people's contents about their daily life,that's just what they want to show you.People online can be very different from real life.So it's kind of hard to collect and analyze valuable data as a regular user.

LinkedIn:various degrees of connections

The LinkedIn professional networking site operates on the concept of how many steps you are away from a person you wish to communicate with. The site encourages you to pass messages to people in your network via the people in your 1st-degree connections list, who in turn pass it to their 1st-degree connections.

This website focus on career and business.For clarity purposes, people in your LinkedIn network are called connections. Your network is made up of 1st degree, 2nd degree and third degree connections and members of your LinkedIn Groups.It provided reliable information by 'limited sharing' and 'high levered gathering'.The data collected here can be very useful and valuable.By the way,the precise recommendation of contacts based on deep data processing is useful to us.