#redux18, Twitter, 2/13/2018 3:03:26 PM, 140496


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#redux18 Twitter NodeXL SNA Map and Report for Tuesday, 13 February 2018 at 14:52 UTC
#redux18 Twitter NodeXL SNA Map and Report for Tuesday, 13 February 2018 at 14:52 UTC
From:
Marc_Smith
Uploaded on:
February 13, 2018
Short Description:
#redux18 via NodeXL http://bit.ly/2sng3ze
@uclpress
@heatherstaines
@pressfuturist
@alpsp
@samartha
@kempcl
@lfsimonite
@operaseu
@njneilj
@nbnibooks

Top hashtags:
#redux18
#openaccess
#oa
#letsgofullmeta
#readup
#openscience
#scholcomm
#publishing
#research

Description:
Description
The graph represents a network of 226 Twitter users whose recent tweets contained "#redux18", or who were replied to or mentioned in those tweets, taken from a data set limited to a maximum of 18,000 tweets. The network was obtained from Twitter on Tuesday, 13 February 2018 at 14:54 UTC.

The tweets in the network were tweeted over the 9-day, 20-hour, 51-minute period from Saturday, 03 February 2018 at 18:00 UTC to Tuesday, 13 February 2018 at 14:51 UTC.

Additional tweets that were mentioned in this data set were also collected from prior time periods. These tweets may expand the complete time period of the data.

There is an edge for each "replies-to" relationship in a tweet, an edge for each "mentions" relationship in a tweet, and a self-loop edge for each tweet that is not a "replies-to" or "mentions".

The graph is directed.

The graph's vertices were grouped by cluster using the Clauset-Newman-Moore cluster algorithm.

The graph was laid out using the Harel-Koren Fast Multiscale layout algorithm.


Author Description


Overall Graph Metrics
Vertices : 226
Unique Edges : 520
Edges With Duplicates : 758
Total Edges : 1278
Number of Edge Types : 3
Mentions : 765
Tweet : 477
Replies to : 36
Self-Loops : 477
Reciprocated Vertex Pair Ratio : 0.091588785046729
Reciprocated Edge Ratio : 0.167808219178082
Connected Components : 18
Single-Vertex Connected Components : 15
Maximum Vertices in a Connected Component : 207
Maximum Edges in a Connected Component : 1250
Maximum Geodesic Distance (Diameter) : 6
Average Geodesic Distance : 2.917055
Graph Density : 0.0114847590953786
Modularity : 0.242039
NodeXL Version : 1.0.1.392

Top Influencers: Top 10 Vertices, Ranked by Betweenness Centrality
Top URLs
Top URLs in Tweet in Entire Graph:
[12] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[5] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3319915/
[5] https://www.alpsp.org/UPRedux
[4] https://events.bizzabo.com/Redux18/home
[4] https://wellcomeopenresearch.org/
[4] https://academicbookfuture.org/end-of-project-reports-2/
[3] http://blogs.lse.ac.uk/impactofsocialsciences/?p=32414
[3] https://twitter.com/betterworldecon/status/963380843807993856
[3] https://events.bizzabo.com/Redux18/page/1309775/registration
[3] https://twitter.com/piotrr70/status/963358924190769152

Top URLs in Tweet in G1:
[4] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[3] https://wellcomeopenresearch.org/
[2] https://events.bizzabo.com/Redux18/home?utm_content=buffer1b2eb&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
[2] https://www.alpsp.org/UPRedux
[2] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140476
[2] https://www.research-consulting.com/why-are-new-university-presses-on-the-rise-and-how-can-you-get-involved/?platform=hootsuite
[1] http://ukscl.ac.uk/
[1] https://twitter.com/piotrr70/status/963358924190769152
[1] https://labs.jstor.org/topicgraph/
[1] https://twitter.com/ronaldsnijder/status/963353219287134208

Top URLs in Tweet in G2:
[3] http://giphy.com/gifs/education-1c0FiNfP6zVZK
[2] https://events.bizzabo.com/Redux18/agenda
[2] https://twitter.com/piotrr70/status/963358924190769152
[1] https://events.bizzabo.com/Redux18/page/1309775/registration
[1] http://giphy.com/gifs/florida-thanksgiving-publix-l41m6difJKi6QRIZO
[1] http://giphy.com/gifs/sherlock-bbc-one-l0HlLZiHatn0BLJde
[1] https://twitter.com/margoline/status/963382638588383234
[1] https://academicbookfuture.org/end-of-project-reports-2/
[1] https://ico.org.uk/for-organisations/guide-to-the-general-data-protection-regulation-gdpr/
[1] https://twitter.com/betterworldecon/status/963380843807993856

Top URLs in Tweet in G3:
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3319915/
[3] http://blogs.lse.ac.uk/impactofsocialsciences/?p=32414
[2] https://twitter.com/inkyiceberg/status/963393831961092097
[2] http://www.lepublikateur.de/2017/11/24/open-access-from-opening-access-to-justifying-business/?utm_content=bufferd3035&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
[2] http://www.lepublikateur.de/2017/03/29/accelerating-openness-foundations-as-driving-force-in-science-publishing/?utm_content=bufferba181&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
[1] https://twitter.com/DatabaseSponge/status/963366283361374208
[1] https://twitter.com/margoline/status/963382638588383234
[1] http://www.perseus.tufts.edu/hopper/
[1] http://ukscl.ac.uk/
[1] https://academicbookfuture.org/end-of-project-reports-2/

Top URLs in Tweet in G4:
[1] https://twitter.com/brianbhalley/status/963354885302431747
[1] https://twitter.com/oxfordpublicity/status/963381096460275712
[1] https://twitter.com/pressfuturist/status/963357772015394817
[1] http://www.aupresses.org/about-aaup/about-university-presses/the-value-of-university-presses
[1] https://twitter.com/samartha/status/963373419000672256
[1] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[1] https://twitter.com/Rwelzenb/status/963368454739906560
[1] https://events.bizzabo.com/Redux18/page/1309775/registration
[1] https://academicbookfuture.org/end-of-project-reports-2/
[1] https://twitter.com/betterworldecon/status/963380843807993856

Top URLs in Tweet in G5:
[1] https://en.wikipedia.org/wiki/Wicked_Bible
[1] https://insights.uksg.org/articles/10.1629/uksg.392/
[1] https://academicbookfuture.org/end-of-project-reports-2/
[1] https://ucldigitalpress.co.uk/BOOC/Article/1/69/
[1] https://twitter.com/pressfuturist/status/963369743091687424
[1] https://twitter.com/pressfuturist/status/963342046399467520
[1] https://twitter.com/betterworldecon/status/963380843807993856
[1] https://twitter.com/apacx/status/963401410078564352
[1] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[1] https://www.thebookseller.com/news/js-group-hails-positive-year-online-sales-grow-731022

Top URLs in Tweet in G6:
[2] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[1] https://events.bizzabo.com/Redux18/agenda
[1] https://events.bizzabo.com/Redux18/page/1309775/registration
[1] https://events.bizzabo.com/Redux18/home
[1] https://wizdom.ai/
[1] https://twitter.com/wizdomai/status/963055304186519552
[1] http://www.accucoms.com/aggregagent
[1] https://twitter.com/alpsp/status/960800462197977088
[1] https://www.highwirepress.com/products-services/preprint
[1] https://www.highwirepress.com/products-services/scolaris

Top URLs in Tweet in G7:
[1] https://twitter.com/uclpress/status/963294607017734144
[1] https://twitter.com/CasemateGroup/status/963345265469149184
[1] https://twitter.com/nbnibooks/status/963370383050199041
[1] https://twitter.com/jfwinters/status/963389228146143233
[1] https://twitter.com/samartha/status/963349921171681280
[1] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[1] https://twitter.com/betterworldecon/status/963345112628695040
[1] https://www.alpsp.org/UPRedux

Top URLs in Tweet in G8:
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3319915/
[1] https://londoneconomics.co.uk/blog/publication/economic-analysis-business-models-open-access-monographs/
[1] http://www.universitiesuk.ac.uk/policy-and-analysis/reports/Documents/2017/monitoring-transition-open-access-2017.pdf
[1] https://twitter.com/betterworldecon/status/963418095699283974
[1] https://events.bizzabo.com/Redux18/home

Top URLs in Tweet in G9:
[1] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[1] http://www.against-the-grain.com/2017/01/v28-6-dust-jackets-to-dust/

Top URLs in Tweet in G10:
[2] https://events.bizzabo.com/Redux18/home?platform=hootsuite
[1] https://nodexlgraphgallery.org/Pages/Graph.aspx?graphID=140478
[1] https://twitter.com/eferwerda/status/963120277797425153
[1] https://www.highwirepress.com/products-services/preprint
[1] https://www.highwirepress.com/products-services/scolaris
[1] https://www.highwirepress.com/products-services/benchpress
[1] https://www.highwirepress.com/products-services/meeting-abstracts
[1] https://www.highwirepress.com/products-services/folio

Top Domains
Top Domains in Tweet in Entire Graph:
[60] twitter.com
[17] bizzabo.com
[14] nodexlgraphgallery.org
[10] highwirepress.com
[6] ac.uk
[6] giphy.com
[5] academicbookfuture.org
[5] nih.gov
[5] alpsp.org
[4] wellcomeopenresearch.org

Top Domains in Tweet in G1:
[6] nodexlgraphgallery.org
[4] twitter.com
[4] bizzabo.com
[3] wellcomeopenresearch.org
[2] alpsp.org
[2] research-consulting.com
[1] ac.uk
[1] jstor.org
[1] google.com
[1] theconversation.com

Top Domains in Tweet in G2:
[12] twitter.com
[6] giphy.com
[5] bizzabo.com
[1] academicbookfuture.org
[1] org.uk
[1] nodexlgraphgallery.org
[1] alpsp.org
[1] wellcomeopenresearch.org
[1] nih.gov
[1] theconversation.com

Top Domains in Tweet in G3:
[5] twitter.com
[4] ac.uk
[4] lepublikateur.de
[3] nih.gov
[2] academicbookfuture.org
[1] tufts.edu
[1] co.uk
[1] timeshighereducation.com
[1] americanaffairsjournal.org
[1] zenodo.org

Top Domains in Tweet in G4:
[6] twitter.com
[2] bizzabo.com
[1] aupresses.org
[1] nodexlgraphgallery.org
[1] academicbookfuture.org

Top Domains in Tweet in G5:
[19] twitter.com
[1] wikipedia.org
[1] uksg.org
[1] academicbookfuture.org
[1] co.uk
[1] nodexlgraphgallery.org
[1] thebookseller.com

Top Domains in Tweet in G6:
[5] highwirepress.com
[3] bizzabo.com
[2] nodexlgraphgallery.org
[2] twitter.com
[1] wizdom.ai
[1] accucoms.com

Top Domains in Tweet in G7:
[6] twitter.com
[1] nodexlgraphgallery.org
[1] alpsp.org

Top Domains in Tweet in G8:
[1] nih.gov
[1] co.uk
[1] ac.uk
[1] twitter.com
[1] bizzabo.com

Top Domains in Tweet in G9:
[1] nodexlgraphgallery.org
[1] against-the-grain.com

Top Domains in Tweet in G10:
[5] highwirepress.com
[2] bizzabo.com
[1] nodexlgraphgallery.org
[1] twitter.com

Top Hashtags
Top Hashtags in Tweet in Entire Graph:
[1050] redux18
[40] openaccess
[28] oa
[17] letsgofullmeta
[15] readup
[9] openscience
[9] scholcomm
[8] publishing
[8] research
[8] monographs



Top Hashtags in Tweet in G1:
[182] redux18
[18] openaccess
[8] letsgofullmeta
[7] monographs
[7] published
[7] uk
[7] ref
[6] digital
[6] infrastructure
[6] scholcomm

Top Hashtags in Tweet in G2:
[179] redux18
[9] oa
[6] openaccess
[4] academic
[4] publishing
[4] etextpub
[3] readup
[3] academictwitter
[3] university
[2] redux2018

Top Hashtags in Tweet in G3:
[241] redux18
[7] openaccess
[5] research
[5] openscience
[3] oa
[3] science
[2] publishing
[2] librarian
[2] academia
[2] phdchat

Top Hashtags in Tweet in G4:
[97] redux18
[9] readup
[3] dadjoke
[3] sorry
[2] academicpublishing
[2] journals
[2] openaccess
[1] pancakeday2018
[1] hellolondon
[1] upredux

Top Hashtags in Tweet in G5:
[112] redux18
[7] oa
[1] booc
[1] journals
[1] production
[1] media
[1] pancakeday2018
[1] letsgofullmeta
[1] openaccess
[1] acbookfuture

Top Hashtags in Tweet in G6:
[43] redux18
[3] wizdomai
[2] journals
[2] lookitup
[2] letsgofullmeta
[1] openaccess
[1] research
[1] academicpublishing
[1] supplychain
[1] pricing

Top Hashtags in Tweet in G7:
[23] redux18
[2] academicpublishing
[1] editors
[1] proofreaders
[1] oa
[1] openaccess
[1] readup
[1] acbookfuture
[1] digital
[1] infrastructure

Top Hashtags in Tweet in G8:
[69] redux18
[3] openaccess

Top Hashtags in Tweet in G9:
[40] redux18
[4] oa
[2] openscience
[1] scholarlypublishing
[1] ref2021
[1] letsgofullmeta
[1] research
[1] assessment
[1] journal
[1] data

Top Hashtags in Tweet in G10:
[29] redux18
[2] oa
[1] letsgofullmeta

Top Words
Top Words in Tweet in Entire Graph:
[579] Words in Sentiment List#1: Positive
[189] Words in Sentiment List#2: Negative
[1] Words in Sentiment List#3: Angry/Violent
[19454] Non-categorized Words
[20222] Total Words
[1050] redux18
[148] university
[136] academic
[95] publishing
[87] presses

Top Words in Tweet in G1:
[182] redux18
[19] academic
[19] book
[18] openaccess
[18] university
[17] press
[16] publishers
[15] open
[15] conference
[14] fisher

Top Words in Tweet in G2:
[179] redux18
[28] academic
[20] pressfuturist
[19] university
[17] presses
[14] uclpress
[14] publishing
[13] one
[13] up
[12] conference

Top Words in Tweet in G3:
[241] redux18
[44] university
[42] academic
[29] wright
[26] s
[25] publishing
[21] jubb
[20] publishers
[18] books
[18] presses

Top Words in Tweet in G4:
[97] redux18
[20] university
[16] uclpress
[15] today
[14] presses
[10] press
[9] ugapress
[9] readup
[8] re
[8] taylor

Top Words in Tweet in G5:
[112] redux18
[18] university
[14] pressfuturist
[14] publishing
[12] presses
[11] publishers
[11] supply
[11] chain
[10] academic
[9] oa

Top Words in Tweet in G6:
[43] redux18
[22] alpsp
[13] university
[10] more
[8] press
[7] conference
[7] uclpress
[7] find
[6] next
[6] excited

Top Words in Tweet in G7:
[23] redux18
[4] need
[4] media
[4] publishers
[3] today
[3] tweeting
[3] publishing
[3] social
[3] hashtag
[3] academic

Top Words in Tweet in G8:
[69] redux18
[12] academic
[11] publishing
[11] hope
[9] oa
[7] jubb
[7] forward
[6] books
[6] next
[5] long

Top Words in Tweet in G9:
[40] redux18
[7] oa
[5] book
[5] now
[5] academic
[5] research
[4] stevenhill
[3] great
[3] need
[3] hefce

Top Words in Tweet in G10:
[29] redux18
[8] more
[7] university
[7] njneilj
[6] interested
[6] presses
[6] follow
[6] today
[6] jisc's
[6] presenting

Top Word Pairs
Top Word Pairs in Tweet in Entire Graph:
[69] university,presses
[43] looking,forward
[42] university,press
[33] richard,fisher
[33] supply,chain
[29] academic,publishing
[24] academic,publishers
[21] redux,conference
[21] timothy,wright
[21] social,media

Top Word Pairs in Tweet in G1:
[13] richard,fisher
[13] looking,forward
[10] university,press
[9] come,listen
[8] academic,book
[8] book,redux18
[8] 1054,days
[8] redux,conference
[7] hill,decoupling
[7] decoupling,academic

Top Word Pairs in Tweet in G2:
[12] university,presses
[11] looking,forward
[7] academic,publishing
[7] supply,chain
[6] british,library
[6] timothy,wright
[6] university,press
[6] social,media
[6] pressfuturist,canty
[5] until,redux18

Top Word Pairs in Tweet in G3:
[15] university,presses
[9] academic,publishing
[7] wright,eup
[6] university,press
[6] academic,book
[6] supply,chain
[6] academic,publishers
[6] richard,fisher
[5] social,media
[5] canty,academic

Top Word Pairs in Tweet in G4:
[11] university,presses
[9] uclpress,redux18
[8] university,press
[6] anthony,cond
[6] david,taylor
[5] cond,livunipress
[5] supply,chain
[4] start,chaired
[4] redux18,today
[4] taylor,ingram

Top Word Pairs in Tweet in G5:
[10] supply,chain
[10] university,presses
[5] redux18,university
[5] pressfuturist,canty
[4] rluk_david,redux18
[4] timothy,wright
[4] very,proud
[4] proud,part
[4] part,start
[4] start,initiative

Top Word Pairs in Tweet in G6:
[6] university,press
[6] university,presses
[5] re,welcome
[5] welcome,redux18
[5] redux18,timothy
[5] timothy,wright
[5] wright,eup
[5] eup,give
[5] give,opening
[5] opening,address

Top Word Pairs in Tweet in G7:
[3] redux18,today
[3] social,media
[3] academic,publishers
[2] interesting,discussion
[2] hashtag,redux18

Top Word Pairs in Tweet in G8:
[5] academic,books
[4] hope,wellcome
[4] wellcome,oa
[4] looking,forward
[3] academic,publishing
[3] oa,mission
[3] mission,statement
[3] statement,redux18
[3] next,two
[3] two,days

Top Word Pairs in Tweet in G9:
[3] walk,access
[2] great,redux18
[2] redux18,conference
[2] conference,today
[2] oa,eligible
[2] stevenhill,hefce
[2] global,book
[2] david,taylor
[2] open,research
[2] disruptive,innovation

Top Word Pairs in Tweet in G10:
[6] interested,university
[6] university,presses
[6] presses,follow
[6] follow,redux18
[6] redux18,today
[6] today,jisc's
[6] jisc's,njneilj
[6] njneilj,presenting
[6] presenting,plenary
[4] jiscopenaccess,interested

Top Replied-To
Top Replied-To in Entire Graph:
@pressfuturist
@lisambayer
@chrisbanks
@nickpublisher
@sthlmunipress
@samartha
@martynrittman
@stevenhill
@ingentaconnect
@stabihh

Top Replied-To in G1:
@stabihh
@ingentaconnect
@martynlawrence
@nickpublisher
@zelda5001
@saspublications
@sthlmunipress

Top Replied-To in G2:
@samartha
@lauravarnam
@africaiai
@sthlmunipress
@lisambayer
@cameronneylon

Top Replied-To in G3:
@pressfuturist
@nickpublisher
@brianbhalley

Top Replied-To in G4:
@lisambayer
@pressfuturist
@ugapress

Top Replied-To in G5:
@pressfuturist
@nickpublisher
@aileenfyfe
@ronaldsnijder

Top Replied-To in G6:
@lisambayer

Top Replied-To in G7:
@uniwestpress

Top Replied-To in G8:
@martynrittman

Top Replied-To in G9:
@stevenhill
@chrisbanks

Top Replied-To in G10:
@chrisbanks
@eferwerda

Top Mentioned
Top Mentioned in Entire Graph:
@pressfuturist
@uclpress
@alpsp
@ronaldsnijder
@samartha
@nickpublisher
@eferwerda
@martynlawrence
@kempcl
@jfwinters

Top Mentioned in G1:
@eferwerda
@operaseu
@uclpress
@ronaldsnijder
@piotrr70
@margoline
@pressfuturist
@alpsp
@christinalenz_
@zelda5001

Top Mentioned in G2:
@pressfuturist
@uclpress
@ronaldsnijder
@britishlibrary
@samartha
@conversationuk
@alpsp
@martynlawrence
@nickpublisher
@edinburghup

Top Mentioned in G3:
@pressfuturist
@kempcl
@lseimpactblog
@livunipress
@samartha
@martynlawrence
@nickpublisher
@lepublikateur
@bearore
@acbookfuture

Top Mentioned in G4:
@uclpress
@ugapress
@livunipress
@pressfuturist
@brianbhalley
@martynlawrence
@saspublications
@evanstonjane
@mobabb3700
@aupresses

Top Mentioned in G5:
@pressfuturist
@uclpress
@edinburghup
@samartha
@rluk_david
@jfwinters
@kempcl
@martynlawrence
@nickpublisher
@alpsp

Top Mentioned in G6:
@alpsp
@uclpress
@sadia__shahid
@ronaldsnijder
@accucoms
@martynrittman
@samartha
@pressfuturist
@clarehooperlup
@livunipress

Top Mentioned in G7:
@oxfordpublicity

Top Mentioned in G8:
@pressfuturist
@lfsimonite
@publons
@sgediting
@finchampress
@jfwinters
@wellcomeopenres
@martynrittman
@nickpublisher
@wellcometrust

Top Mentioned in G9:
@stevenhill
@hefce
@chrisbanks
@hjhope
@wellcometrust
@britishlibrary
@ingramcontent
@ingentaconnect
@pressfuturist
@nesta_uk

Top Mentioned in G10:
@njneilj
@jiscopenaccess
@ronaldsnijder
@rluk_david
@chrisbanks
@kunlatched
@uclpress
@alpsp

Top Tweeters
Top Tweeters in Entire Graph:
@britanniacomms
@monamonaelise
@textundblog
@pressfuturist
@samatlounge
@conversationuk
@larryirby6
@peer__reviewer
@timeshighered
@tim_coronel

Top Tweeters in G1:
@conversationuk
@timeshighered
@ukstartupevents
@stabihh
@bizzabo
@piotrr70
@benmcleish
@atwoodtate
@jeroenson
@emeraldglobal

Top Tweeters in G2:
@monamonaelise
@textundblog
@davidpriceucl
@udadisi
@jisc
@sashers
@uclpress
@danfranke79
@graham_stone
@britishlibrary

Top Tweeters in G3:
@pressfuturist
@samatlounge
@tim_coronel
@academicchatter
@lseimpactblog
@plosone
@bookstothesky
@clarehooperlup
@editions_puf
@mddelahunty

Top Tweeters in G4:
@nbnibooks
@bookhussey
@britishmuseum
@policypress
@livunipress
@lisambayer
@kentuckypress
@mobabb3700
@aupresses
@databasesponge

Top Tweeters in G5:
@thebookseller
@cantavest
@samartha
@yalepress
@royal_armouries
@mv_books
@bentoth
@openresleeds
@rluk_david
@martynlawrence

Top Tweeters in G6:
@britanniacomms
@larryirby6
@alpsp
@sdawsonberlin
@eduestates
@eduestwales
@plslicensing
@accucoms
@markdagrossa
@danfilby

Top Tweeters in G7:
@lynrobinson
@soheab_malik1
@editorspice
@annemnolan
@samoore_
@oxfordpublicity
@2omclark
@apacx
@goldsmithspress
@inspiredsearch

Top Tweeters in G8:
@peer__reviewer
@pjacock
@sgediting
@javennall
@weareingenta
@nectaresearch
@publons
@martynrittman
@lfsimonite
@clarivate

Top Tweeters in G9:
@rmounce
@wellcometrust
@nesta_uk
@ingramcontent
@varioushats
@chrisbanks
@stevenhill
@imperiallibrary
@hefce
@hjhope

Top Tweeters in G10:
@science_open
@yvonnenobis
@cameronneylon
@kunlatched
@hblanchett
@hannah_degroff
@highwirepress
@jiscopenaccess
@njneilj