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SEARCH KEYWORD -- Ghost City



  Will Google+ be a "Ghost City"


Just now, I read an article about Google+’s status quo. The key point of this article is that it states that Google+ is now a “Ghost City”. According to the article, users of Google+ spend only 3 minutes per month on Google+, this is a very low participation rate for a social network website. After reading this, I wonder whether Google+ is really a Ghost City now, I cannot give my answer. Since it was released just around 8 months ago, so the user base is not very large. I registered ...

   Google+,Social fayigue,User base,Ghost City     2012-02-28 09:44:39


  Sending message to Slack Incoming Webhook using PHP


Slack is a popular work collaboration tool and it provides many features which help teams collaborate. It has one function which allows sending messages to channels from external source such as your own web service -- Incoming Webhook. This is extremely useful when want to monitor something and get notified when some event occurs and it doesn't require complicated setup. To send messages using Incoming Webhook, a service URL has to be generated on Slack and then the message can be posted to this...

   PHP,CURL,SLACK,INCOMING WEBHOOK     2017-03-11 21:32:28


  CASSANDRA data model


Cassandra is an open source distributed database, it combines dynamic key/value and column oriented feature of Bigtable. Features of Cassandra are: Flexible schema, no need to design schema first, it's very convenient to add or delete strings Support range search on keys High usability, extensible. The single node error will not affect the cluster. We can think Cassandra's data model as a 4 or 5 dimensional Hash. COLUMN Columns is the smallest data unit in Cassandra, it is a 3 dimensional data...

   Cassandra,database,sort     2013-06-08 22:07:40


  Why choosing Carnegie Mellon over Harvard?


Carnegie Mellon and Harvard are both well-known world class universities. They have attracted lots of students all around the world to apply for. But Carnegie Mellon and Harvard are two different types of universities, they have different focus as well. What drives people to choose Carnegie Mellon over Harvard? Yishan Wong, CEO of Reddit gave his opinion on Quora.  Because you can fail out of Carnegie Mellon.  It's well-known that once you get into Harvard, it's very difficult to fail ...

   Carnegie Mello,Harvard     2013-08-08 22:10:11


  Why are column oriented databases so much faster than row oriented databases?


I have been playing around with Hybrid Word Aligned Bitmaps for a few weeks now, and they turn out to be a rather remarkable data structure.  I believe that they are utilized extensively in modern column oriented databases such as Vertica and MonetDB. Essentially HWABs are a data structure that allows you to represent a sparse bitmap (series of 0's and 1's) really efficiently in memory.  The key trick here is the use of run length encoding to compress the bitmap into fe...

   Database,Column oriented,Speed analysis,Vertica     2012-01-29 04:27:05


  Google+ is sick


Google says that Google+ now has over 170million registered users, but according a new research report of Fast Company about Google+,  Google+ is just a virtual ghost town.This research selected a sample of 40,000 random Google+ users. The result is :The average post on Google+ has less than one +1, less than one reply, and less than one re-shareRoughly 30% of users who make a public post never make a second oneEven after making five public posts, there is a 15% chance that a user will not ...

   Google+,Sick,Research     2012-05-16 05:41:35


  Silicon Valley won’t dominate the tech world forever


Yesterday  I published a piece about Newry in Northern Ireland, which is looking to help boost its economy by encouraging a startup ecosystem. A little later, a post entitled ‘You will not be the next Silicon Valley, please stop trying‘ appeared over on Pando Daily, in which the author decided pull a bunch of Irish stereotypes out of the bag to attack the idea. Now, I could detail everything that’s wrong with the article, but the comments there do a perfect job of ripping it apart. ...

   Silicon Valley,Domination,Technology,Startup,Trend     2012-02-13 05:21:57


  Get Bluetooth back on my ASUS Zenbook UX31A


A strange thing occurred to me a few days ago after I installed some routine Windows updates on my ASUS Zenbook UX31A, my Bluetooth was gone and I could not have my Bluetooth speaker connected to my PC and listen  my favorite music. It's just like a ghost, everything disappears all of a sudden. Everything was tried to find where my Bluetooth went but no luck. Below is what my device manager shows: No Bluetooth is found, usually if there is some issue with the Bluetooth driver, the device m...

   Bluetooth,Windows 8.1,ASUS Zenbook, Bluetooth driver     2014-12-11 09:17:11


  Nokia : Nokia map is better than Apple map


Recently, the new release of Apple map is criticized by many users because of its search results accuracy. By this time, Nokia which has its map service Ovi Maps has a comparison of three maps in its Conversations blog. These three maps are the one on the Lumia 920, the Google Map on Samsung Galaxy S3, the map on Apple iPhone 5, It wants to show that Nokia is the best among them. Let's take a look:1. Offline modeOn Lumia 920 Map, the map of the entire country is downloaded, you can position, sea...

   Lumia 920,Galaxy s3,iPhone 5,Map     2012-09-22 00:09:24


  Huateng Ma becomes the richest person in China


On 22 July, Licai Zhoubao, a famous wealth management media in China, released a ranking about Chinese most richest people. In this ranking, Tencent CEO, Huateng Ma for the first time becomes the richest person in China with 46.7 billion RMB(around  $7.6 billion), his wealth was 35.4 billion RMB(around $5.76 billion) last year. That means his wealth increases 11.3 billion RMB($1.84 billion) in one year. In 2012, Tencent Corp had a revenue of 43.9 billion RMB(around $7.15 billion), which inc...

   Tencent,WeChat,Huateng Ma     2013-07-22 08:55:13