Wednesday, 15 January 2020

Social media network Analysis: Further visualisation

In a previous post (http://bit.ly/TAGS2GEPHI ) I look at moving data from a TAGS (https://tags.hawksey.info/) spreadsheet collecting tweets into a network visualisation tool (GEPHI) to plot a network of interactions based on how replied to whom. We left it at a graph like the one below with the thick the line the stronger/more replies there were.




Still going to use the same data but look at some of the other options to visualise these relationship. Tools like Gephi offer many ways to layout the plots

The one below is the ForceAtlas2 layout is good for showing groupings for this problem:
One I like because it is attractive and I feel shows the number of nodes and their interactions is the Fructerman Reingold (shown below)



One of the features of Gephi is you can add plug-ins; including new layouts. Two I am enjoying playing with is the Circular layout



Also the Dual circular layout - where you set two circles based on some criterian in this case number of interactions - the outer ring has the 20 highest scoring nodes and the central ring is the remaining nodes. 


What does it show? Possibly there is a lot of interactions between the highest scoring nodes.



Take home item I think is just play with the layouts and the tools.



All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon

Friday, 10 January 2020

Social media network Analysis: Going from TAGS to Gephi

In a previous post the use of the brilliant Twitter capture and analysis tool TAGS developed by Martin Hawksey (@mhawksey) was introduced, click here to read it. In this post, I am going to show using the data collected and transferring some of it into a Network Visualisation tool Gephi.


Setting up Gephi
The software is open-source and can be downloaded from https://gephi.org/ Gephi does have some system requirements, which can be found here, but it should run on lot of machines (Mac, PC and Linux with a graphics card) but Java will need to added or already installed. 

I have found a problem, and I was very relieved to find out I was not the only one, with Gephi not working because I couldn't finding Java. The bug is known and there is a fix is available and how to do it can be found at https://bryanemichael.wordpress.com/2017/04/11/gephi-0-9-1-wont-work-unless-you-specific-a-java-folder/ (Thankyou  @NomadWarMachine for sharing this) or on a Mac http://forum-gephi.org/viewtopic.php?f=3&t=3580#p10873

Hopefully Gephi now works



Transferring the data from TAGS 
We are going to have a play with showing who replies to who (crude method but shows some of the links happening), The video below shows the stages in action




Stage 1: Open the TAGS spreadsheet and go to Archive sheet. Save this sheet as CSV file.

Stage 2: In a spreadsheet package open the new CSV file and remove the first column (id_str). If we save it again as a CSV file it is ready to load in Gephi. Don't close down the spreadsheet we will want it later.

Stage 3: Open Gephi and from the file menu import the spreadsheet. It will give an error, just change the Import as: to Nodes table and then press Next > and then Finish and then ok. You will probably get a graph with lots of dots (e.g. like the figure below) but not much more there are no connections between the nodes.



Stage 4: Go back to the spreadsheet used in stage 2, in this example we are only interested in connections based on replies, so we delete all columns except from_user and in_reply_to_screen_name and now save the spreadsheet as a CSV file but with a different file name. Change from_user to Source and in_reply_to_screen_name to Target, Gephi needs these two headings for the next stage and now save again.

Stage 5: Now go back into Gephi and import the new spreadsheet from stage 4 in this time it should find Source and Target and not give an error. Follow the clicks through it will say at some point that there is missing values for Target ignore it but make the merged setting be set to something like Sum. You should now get a plot a bit like the one seen in the video with nodes connected by edges in most cases. If we go to the bottom of the graph there is an arrow icon; click on this and we add labels to the graph, it is worth playing around with this to work out the operation of this function



Now we have it in Gephi we apply different ways to present and analyse the network. This will be discussed in a later blog post.

Some more information on this and some other techniques can be found at:






All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon

Wednesday, 8 January 2020

BCS Northampton - VR Therapies

Taken from: https://www.bcs.org/events/2020/february/bcs-northampton-vr-therapies/

Presentation on the latest advances in immersive healthcare and how they are improving lives around the world.  Virtual Reality (VR) is changing pain management and offering an alternative to addictive pain-killers.
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SPEAKERS
Rebecca Gill - Nurse & Founder of VR therapies
--------------------------------------------------------------------------------
AGENDA
19.30 - Presentation
21.00 - Close of event 
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SYNOPSIS
Rebecca Gill, founder of VR Therapies, will be discussing the latest advances in immersive healthcare and how they are improving lives around the world.
From reducing recovery time in rehabilitation to supporting children with chemotherapy, immersive technology is transforming healthcare. Virtual Reality (VR) is changing pain management and offering an alternative to addictive pain-killers.
https://www.vrtherapies.co.uk/
--------------------------------------------------------------------------------
SPEAKER BIOGRAPHIES
Speaker: Rebecca Gill -https://www.linkedin.com/in/rebecca-gill-31492a172/
--------------------------------------------------------------------------------
For overseas delegates who wish to attend the event please note that BCS does not issue invitation letters.
--------------------------------------------------------------------------------
THIS EVENT IS BROUGHT TO YOU BY:
BCS Northampton Branch 
Visit https://www.bcs.org/membership/member-communities/northampton-branch/
Date and time
11 February, 7:30pm - 9:00pm
Location
The University of Northampton
Learning Hub LH017
University Drive
Northampton
England
NN1 5PH
Price
Free

Eventbrite booking link: 




All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon

Tuesday, 7 January 2020

Social media network Analysis: TAGS to start with

I am fascinated by connections and seeing connections between things, One area that particularly intrigues me is people connecting via social media and Twitter in particular.

Where to start?
I would suggest try the brilliant tool TAGS https://tags.hawksey.info/ by Martin Hawksey (@mhawskey), it is free and collects Twitter data and puts it into a Google Sheet. I won't describe setting it up if you click on https://tags.hawksey.info/get-tags/ it takes you through the process. You will need both a Twitter and a Google account to use it, but after that it is free and the spreadsheet is stored on Google's servers.


Once set up you can just start searching, below is an image of search (entered in box 2) for #socmedhe OR #socmedhe TAGS on Twitter.


From the TAGS pull-down menu you can start your search by  Run Now!



There are a number of nice features. As two examples

  • once you have it set-up there is an option to update it every hour after the initial run. This means you just leave it running and let Google do the work.
  • Click on the Share button and get a shareable link for Anyone with the link can view. do this means you can visualise the  tweets using the TAGSExplorer, which gives a clickable URL (e.g. http://hawksey.info/tagsexplorer/?key=1S23uOXD-BaWX4MnShveTk3LY32II3p4wEZ4G4B-h1fg&gid=400689247 )  and you get a graph similar to the one below showing links to between people based on replies. The ones with no links to them didn't reply or were not replied to; but they may have been mentioned or retweeted.  There are also four tabs where you can list things like who tweeted using the hashtags or top hashtags associate with this hashtags.




At the bottom right-hand-side of the screen there links to add retweets or mentions. Adding mentions you can get a graph similar to the one below (mentions are the dashed line and the solid line is a reply):






There are plenty of other features to look at but I will leave them to you to play with. To get going the following may be of use:



In the next post moving TAGS to another tool Gephi to analyse the data further will be discussed.









All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon

Monday, 23 December 2019

Top 10 most popular posts viewed on Computing in Northamptonshire 2019

The top 10 posts viewed on this blog during 2019





All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon

Saturday, 14 December 2019

BCS Northampton Event - Software Defined WAN 101 Lecture in Tweets


On the 10th December, the BCS Northampton Branch held a talk on Software Defined WAN lead by Barney Duffy. Here are a few tweets from the event:






All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon

Tuesday, 3 December 2019

BCS Northampton Branch - Software Defined WAN 101 Lecture



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SPEAKER
B M Duffy

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AGENDA
19.00 – Refreshments and networking
19.30 – Main presentation
20:30 – Approx end
--------------------------------------------------------------------------------
SYNOPSIS
The following topics will be discussed
• SD WAN  what is it
• Benefits of SD WAN
• Comparing MPLS, Which is better
• Cloud based solutions
• Hybrid Solutions
• Considerations before you deploy
• Where is the technology going
• When is the right time
--------------------------------------------------------------------------------
SPEAKER BIOGRAPHIES
Headline Speaker: B M Duffy
Originally from Belfast moved to Northampton in 1993.
Over 30 years experience in Telecommunications Industry. Experience includes designing some of the largest Voice networks, and Contact Centres in Europe. Includes TDM and VOIP Voice Network Design, Unified Communications, Fixed mobile Convergence. Specialising in Contact Centre design using SIP, IVR, CRM, CTI, VR, WFM, Business Process Engineering.
Member of CCS from 1997 and a volunteer at The National Museum of Computing at Bletchley Park since 1997
--------------------------------------------------------------------------------
For overseas delegates who wish to attend the event please note that BCS does not issue invitation letters.
--------------------------------------------------------------------------------
THIS EVENT IS BROUGHT TO YOU BY:
BCS NORTHAMPTON
Visit https://northampton.bcs.org/index.php?menu_id=1


Date and time
10 December, 7:00pm - 8:30pm
Location
The University of Northampton
Learning Hub Room LH016, 
University Drive
Northampton
Northamptonshire
NN1 5PH






All views and opinions are the author's and do not necessarily reflected those of any organisation they are associated with. Twitter: @scottturneruon