Docear http://www.docear.org The Academic Literature Suite Thu, 13 Jun 2013 20:50:22 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 Three new research papers (for TPDL’13) about user demographics and recommender evaluations, sponsored recommendations, and recommender persistance http://www.docear.org/2013/06/06/three-new-research-papers-for-tpdl13-about-user-demographics-and-recommender-evaluations-sponsored-recommendations-and-recommender-persistance/ http://www.docear.org/2013/06/06/three-new-research-papers-for-tpdl13-about-user-demographics-and-recommender-evaluations-sponsored-recommendations-and-recommender-persistance/#comments Thu, 06 Jun 2013 14:58:18 +0000 Joeran [Docear] http://www.docear.org/?p=2587 After three demo-papers were accepted for JCDL 2013, we just received notice that another three posters were accepted for presentation at TPDL 2013 on Malta in September 2013. I think the papers are quite interesting (well, that’s probably no surprise since I wrote them ). They cover some quite novel aspects of recommender systems relating to [...]]]> After three demo-papers were accepted for JCDL 2013, we just received notice that another three posters were accepted for presentation at TPDL 2013 on Malta in September 2013. I think the papers are quite interesting (well, that’s probably no surprise since I wrote them ;-) ). They cover some quite novel aspects of recommender systems relating to re-showing recommendations multiple times, considering user demographics when evaluating recommender systems, and investigating the effect of labeling recommendations. However, you can read the papers yourself, as we publish them as pre-print right now and right here:

Paper 1: The Impact of Users’ Demographics (Age and Gender) and other Characteristics on Evaluating Recommender Systems (Download PDF | Doc)

In this paper we show the importance of considering demographics and other user characteristics when evaluating (research paper) recommender systems. We analyzed 37,572 recommendations delivered to 1,028 users and found that elderly users clicked more often on recommendations than younger ones. For instance, users with an age between 20 and 24 achieved click-through rates (CTR) of 2.73% on average while CTR for users between 50 and 54 was 9.26%. Gender only had a marginal impact (CTR males 6.88%; females 6.67%) but other user characteristics such as whether a user was registered (CTR: 6.95%) or not (4.97%) had a strong impact. Due to the results we argue that future research articles on recommender systems should report demographic data to make results better comparable.

Paper 2: Persistence in Recommender Systems: Giving the Same Recommendations to the Same Users Multiple Times (Download PDF | Doc)

How do click rates vary between research paper recommendations that were previously shown to the same user and recommendations shown for the very first time? To answer this question we analyzed 31,942 research paper recommendation given to 1,155 students and researchers. Results indicate that recommendations should only be displayed once and click-through rates for ‘fresh’, i.e. previously unknown, recommendations are twice as high as for already known recommendations. However, results also show that some users are ‘oblivious’. It frequently happened that users clicked on recommendations they already knew. In one case the same recommendation was shown six times to the same user and the user clicked on it each time again. Overall, around 50% of clicks on reshown recommendations were such ‘oblivious-clicks’.

Paper 3: Sponsored vs. Organic (Research Paper) Recommendations and the Impact of Labeling (Download PDF | Doc)

In this paper we show that organic recommendations are preferred over commercial recommendations even when they recommend the same freely downloadable research papers. Simply the fact that users perceive recommendations as commercial decreased their willingness to accept them. It is further shown that the exact labeling of recommendations matters. For instance, recommendations labeled as ‘advertisement’ performed worse than those labeled as ‘sponsored’. Similarly, recommendations labeled as ‘Free Research Papers’ performed better than those labeled as ‘Research Papers’. However, whatever the differences between the labels were – the best performing recommendations were those with no label at all.

Deadline for submitting the camera-ready papers is Sunday, June 9th. If you can spare some time, please feel free to read the papers and let us know any spelling errors, typos, grammar problems, etc. We will gladly incorporate your suggestions into the final version. 

]]> http://www.docear.org/2013/06/06/three-new-research-papers-for-tpdl13-about-user-demographics-and-recommender-evaluations-sponsored-recommendations-and-recommender-persistance/feed/ 0 Docear at JCDL 2013 in Indianapolis (USA), three demo papers, proof-reading wanted http://www.docear.org/2013/05/21/docear-at-jcdl-2013-in-indianapolis-usa-three-demo-papers-proof-reading-wanted/ http://www.docear.org/2013/05/21/docear-at-jcdl-2013-in-indianapolis-usa-three-demo-papers-proof-reading-wanted/#comments Tue, 21 May 2013 07:53:32 +0000 Joeran [Docear] http://www.docear.org/?p=2581 Three of our submissions to the ACM/IEEE Joint Conference on Digital Libraries (JCDL) were accepted, namely

Docear4Word: Reference Management for Microsoft Word based on BibTeX and the Citation Style Language (CSL)

In this demo-paper we introduce Docear4Word. Docear4Word enables researchers to insert and format their references and bibliographies in Microsoft Word, based on BibTeX and the [...]]]> Three of our submissions to the ACM/IEEE Joint Conference on Digital Libraries (JCDL) were accepted, namely

Docear4Word: Reference Management for Microsoft Word based on BibTeX and the Citation Style Language (CSL)

In this demo-paper we introduce Docear4Word. Docear4Word enables researchers to insert and format their references and bibliographies in Microsoft Word, based on BibTeX and the Citation Style Language (CSL). Docear4Word features over 1,700 citation styles (Harvard, IEEE, ACM, etc.), is published as open source tool on http://docear.org, and runs with Microsoft Word 2002 and later on Windows XP and later. Docear4Word is similar to the MS-Word add-ons that reference managers like Endnote, Zotero, or Citavi offer with the difference that it is being developed to work with the de-facto standard BibTeX and hence to work with almost any reference manager.

Docears PDF Inspector: Title Extraction from PDF files

In this demo-paper we present Docear’s PDF Inspector (DPI). DPI extracts titles from academic PDF files by applying a simple heuristic: the largest text on the first page of a PDF is assumed to be the title. This simple heuristic achieves accuracies around 70% and outperforms the tool ParsCit which uses machine learning (accuracy between 36-50%). In addition, DPI is around 40 times faster than ParsCit, released under the free open source license GPL 2+, written in JAVA and runs on any major operating system.

Introducing Docear’s Research Paper Recommender System

In this demo paper we present Docear’s research paper recommender system. Docear is an academic literature suite to search, organize, and create research articles. The users’ data (papers, references, annotations, etc.) is managed in mind maps and these mind maps are utilized for the recommendations. Using content based filtering methods, Docear’s recommender achieves click through rates around 6%, in some scenarios even over 10%.

That means, we will be in Indianapolis  in July 2013. In a few days (Mai 28th) we have to submit the camera ready versions of the three demo papers listed above. Since we are no native English speakers, there probably are some spelling and grammar mistakes in the papers. If you are a native English speaker and would like to do us a favor, please feel free to read the papers and send us some feedback (we could also send you the word documents it you like). And a ‘funny’ side note: another three posters we submitted also received quite good feedback but were rejected only because the space for poster boots is so limited on the JCDL.

]]> http://www.docear.org/2013/05/21/docear-at-jcdl-2013-in-indianapolis-usa-three-demo-papers-proof-reading-wanted/feed/ 1 Docear4Word 1.1: Support of “Suppress Author”, “Author only” and some other nice options http://www.docear.org/2013/05/15/docear4word-1-1-support-of-suppress-author-author-only-and-some-other-nice-options/ http://www.docear.org/2013/05/15/docear4word-1-1-support-of-suppress-author-author-only-and-some-other-nice-options/#comments Wed, 15 May 2013 07:10:30 +0000 Joeran [Docear] http://www.docear.org/?p=2567 Docear4Word 1.1 is available for download and it offers two new features that will improve your work with references in Microsoft Word a lot. Actually, we added two new elements to the “Add References” dialog.

The first one is a “Docear->Docear4Word” button. It’s intended for adding several references at once when you have multiple BibTeX keys [...]]]> Docear4Word 1.1 is available for download and it offers two new features that will improve your work with references in Microsoft Word a lot. Actually, we added two new elements to the “Add References” dialog.

The first one is a “Docear->Docear4Word” button. It’s intended for adding several references at once when you have multiple BibTeX keys in our clipboard. And here is how it works: Most references managers (e.g. JabRef and Docear) allow you to select several reference entries from the database and copy their BibTeX keys to the clipboard. That means you have a string like “Cohen05,ritchie2008,Eto12″ in your clipboard. Now, when you press the ”Docear->Docear4Word” button, Docear4Word will automatically get that string from the clipboard, identify the BibTeX keys and select the references belonging to the keys. This will make inserting several references at once much easier.

New Docear4Word Features

The second feature is one that I personally wanted for a long time: the option to suppress an author or adding an author-only as reference. So far one could only add a reference like [1] or (Smith, 2001). With the “author-only” option it’s possible to add a reference like Smith and with the “suppress-author” option it’s possible to add a reference like (2001). In addition you can select the “author+year” option which adds a reference like Smith (2001). We also added some intelligence that allowed you adding multiple references at once with these options. For instance if you selected three entries with the “Author+Year” option you would automatically get Smith (2001), Miller (1999) and Johnson (2004). However, please be aware that these options are only working if you are using a non-numeric citation style. That means you cannot have numeric references like [1] and additionally add an “Author-Only” or “Suppress-Author”.

Actually, the second feature is one that I wanted to have for a long time and I am sure many of you also missed it. Due to our limited resources we just had no time to implement it ourselves. Fortunately, we received a generous donation from one of our users, namely Dominik Petko. Dominik donated 250€ (and I added another 50€) which allowed us to pay the freelancer, Simon Hewitt, who already heavily supported us in the initial development of Docear4Word. For the 300€ he implemented the two new features.

If you are missing a feature in Docear4Word and you want it urgently being developed, please consider to do it like Dominik and donate some money for having your desired feature implemented. If you are interested, contact us, and let us know which feature you want and what’s the donation would be you wanted to make. Here are some ideas we have for improving Docear4Word

 

]]> http://www.docear.org/2013/05/15/docear4word-1-1-support-of-suppress-author-author-only-and-some-other-nice-options/feed/ 1 Docear’s PDF Inspector 1.01 released (title extraction now over multiple lines) http://www.docear.org/2013/05/07/docears-pdf-inspector-1-01-released-title-extraction-now-over-multiple-lines/ http://www.docear.org/2013/05/07/docears-pdf-inspector-1-01-released-title-extraction-now-over-multiple-lines/#comments Tue, 07 May 2013 10:37:17 +0000 Joeran [Docear] http://www.docear.org/?p=2558 Docear’s PDF Inspector had a little bug: titles from PDFs were only extracted over the first two lines. That means when you had a PDF whose title expanded over three or more lines, only a part of the title was extracted. This bug is fixed in the current version 1.01.

Just for those who don’t know [...]]]> Docear’s PDF Inspector had a little bug: titles from PDFs were only extracted over the first two lines. That means when you had a PDF whose title expanded over three or more lines, only a part of the title was extracted. This bug is fixed in the current version 1.01.

Just for those who don’t know what Docear’s PDF Inspector is: Docear’s PDF Inspector is a JAVA library that extracts titles from a PDF file not from the PDF’s metadata but from its full-text. More precisely, Docear’s PDF Inspector extracts the full-text of the first page of a PDF and looks for the largest text in the upper third of that page. This text is returned as title. Of course, this does not always deliver the correct title (e.g. sometimes the journal name is formatted in a larger font size than an article’s title) but in about 70% you will get the correct title.

Download Docear’s PDF Inspector 1.01

]]> http://www.docear.org/2013/05/07/docears-pdf-inspector-1-01-released-title-extraction-now-over-multiple-lines/feed/ 1 Docear4Word 1.02: Fixing some sorting problems http://www.docear.org/2013/04/15/docear4word-1-02-fixing-some-sorting-problems/ http://www.docear.org/2013/04/15/docear4word-1-02-fixing-some-sorting-problems/#comments Mon, 15 Apr 2013 17:00:43 +0000 Joeran [Docear] http://www.docear.org/?p=2540 Docear4Word 1.02 is available for download. It fixes one bug that occurred when adding several references at once. For instance, when you inserted three references [1-3], added another three references [4-6] and then added all six references again you would expect to get [1-6] but instead you got a list like [1,2,5,3,6,4].

Just for those [...]]]> Docear4Word 1.02 is available for download. It fixes one bug that occurred when adding several references at once. For instance, when you inserted three references [1-3], added another three references [4-6] and then added all six references again you would expect to get [1-6] but instead you got a list like [1,2,5,3,6,4].

Just for those who don’t know what Docear4Word is: Docear4Word is an add-on for Microsoft Word (2003 and later) that allows you to insert references and bibliographies from BibTeX files to MS-Word documents. The great thing is that you don’t need to care about formatting. You can choose from 1,700+ citation styles (APA, MLA, Turabian, Harvard, IEEE, ACM, …).

Read more…

]]> http://www.docear.org/2013/04/15/docear4word-1-02-fixing-some-sorting-problems/feed/ 0 We offer a paid internship for Bachelor students from Greece, Italy, Portugal, and Spain http://www.docear.org/2013/04/05/we-offer-a-paid-internship-for-bachelor-students-from-greece-italy-portugal-and-spain/ http://www.docear.org/2013/04/05/we-offer-a-paid-internship-for-bachelor-students-from-greece-italy-portugal-and-spain/#comments Fri, 05 Apr 2013 12:39:54 +0000 Joeran [Docear] http://www.docear.org/?p=2512 We are glad to announce that we, again, will offer a paid internship in cooperation with the German Academic Exchange service (DAAD). If you are an undergraduate student, interested in software engineering or statistics, and coming from the Greece, Italy, Portugal, or Spain, get yourself started and do an 8-12 weeks internship in summer or [...]]]> We are glad to announce that we, again, will offer a paid internship in cooperation with the German Academic Exchange service (DAAD). If you are an undergraduate student, interested in software engineering or statistics, and coming from the Greece, Italy, Portugal, or Spain, get yourself started and do an 8-12 weeks internship in summer or autumn 2013, fully paid. And if you are not applicable to apply for the internship – please tell your friends to apply! :-)

Your project

Your research question to answer will be “How to provide (better) research paper recommendations to our users?”. As such, it will be your task to support the Docear team in researching how the interests of Docear’s users can be identified from the users’ mind maps and how these interests can be matched with interesting items to recommend. You will do literature research, create new ideas, analyze user data, and implement new recommendation approaches in JAVA. Of course, you don’t have to do all of this alone – you will be closely cooperating with the Docear team. Your work will be integrated into Docear and used by thousands of researchers around the world. If your work is outstanding, we will write a research paper with you.

Requirements

You should have a profound knowledge of the programming language JAVA. Knowledge in statistics, machine learning, other programming languages (especially C/++ or Python) and/or MySQL, neo4j, Hibernate, Jersey, REST Web Services, Tomcat, and Apache is a plus, but not a requirement. Of course, we would appreciate if you spoke German but it would be no problem if you only spoke English. We would prefer, if you apply for a long internship (12 weeks) but you can also apply for a shorter internship. If you are interested in combining your internship with writing a Bachelor thesis, please let us know in advance (this would be highly welcome). You can start at any date you want in summer or autumn 2013.

Important: If you don’t want to program but have profound knowledge in statistics you are also very welcome to apply. In this case you will support us evaluating how good our current recommender system is, and you will help us generating ideas for improvements. Please indicate in your application clearly that you are not interested in software development but in statistics.

Magdeburg (Germany) and around

Docear is a part of the Data and Knowledge Engineering Group (DKE) of Prof. Dr. Andreas Nürnberger at the computer science department at Otto-von-Guericke University (OvGU), Germany. The OvGU is a rather young university located in the center of Magdeburg. Especially the computer science department is well equipped and in a newly renovated building. For more information about the university read here.  Magdeburg has a nice cultural life, beautiful parks, and a big shopping mall. Housing is rather cheap. You may get a room in a shared flat for as little as 150€ a month (however, slightly over 200€ is more realistic). Read more about Magdeburg on Wikitravel and keep in mind that Berlin (German’s vibrant capital) is just an hour away.

 Payment

650€ a month plus health insurance, accident and private liability insurance plus 160€ pocket money for travelling.

Apply

Register on DAAD’s website and read their information (registration will be open from April 8th). Check out their database and search for Docear (you need to log-in first). Apply before April 28, 2013.  Wait a couple of weeks for notification.

Questions?

Read again the most important information in this PDF, at DAAD’s website, or send us an email.

]]> http://www.docear.org/2013/04/05/we-offer-a-paid-internship-for-bachelor-students-from-greece-italy-portugal-and-spain/feed/ 0 Docear Beta 9 with several bug fixes and feature enhancements http://www.docear.org/2013/03/27/docear-beta-9-with-several-bug-fixes-and-feature-enhancements/ http://www.docear.org/2013/03/27/docear-beta-9-with-several-bug-fixes-and-feature-enhancements/#comments Wed, 27 Mar 2013 11:28:12 +0000 Joeran [Docear] http://www.docear.org/?p=2499 The 9th Beta of Docear is available for free download. It contains no new features but several bug fixes and feature improvements. One improvement includes the removal of line breaks in imported annotations. So far, when you highlighted text over several lines in a PDF, Docear imported the lines breaks of the highlighted text which sometimes [...]]]> The 9th Beta of Docear is available for free download. It contains no new features but several bug fixes and feature improvements. One improvement includes the removal of line breaks in imported annotations. So far, when you highlighted text over several lines in a PDF, Docear imported the lines breaks of the highlighted text which sometimes caused a not so nice layout. In the new Docear you can do a right click on a node that links an annotation and select “PDF->Remove lines breaks from annotation”. Bug fixes include a  fix for the bug that the Adobe Acrobat Professional PDF Viewer wasn’t recognized under MacOS. On Linux the splash screen does not hide any more the setup screen on the very first start of Docear. For a detailed list of all changes see the following change log. And keep in mind – we are always looking forward for your feedback and don’t forget to have a look at the new preview of Docear’s Online Viewer.

Feature Enhancements:

  • #678 Adobe Acrobat Professional is included in PDF Viewer recognition on MacOS
  • #782 Function to remove line breaks in annotations
  • #784 More default file types to be imported

Bug fixes:

  • #734 Open document did not work with system PDF reader in one dialog
  • #785 splash screen hid the setup dialogs on first installation (Linux)
  • #771 Removed spaces in annotations (in a PDF) were not recognized
  • #739 References was not assigned to PDF correctly when path contained special characters
  • #769 Monitoring Update conflict was not solvable when annotations contained HTML code
  • #797 Docear “destroyed” annotations in PDFs when the node style was changed in a mind map
  • #800 “import annotations” options were not visible when using special PDF files
  • #725 PDF destinations changed in PDF viewer were not updated in mind maps
  • #719 Comments on underlined text passages were not imported
  • #701 PDF via Drag&Drop caused other object model than adding a PDF via monitoring function
  • #790 Fixed errors caused by notification bar
  • #715 0kb mind map was created when the map was deleted on the hard drive
  • #730 Reference updater threw exceptions when resolving node hyperlinks
]]> http://www.docear.org/2013/03/27/docear-beta-9-with-several-bug-fixes-and-feature-enhancements/feed/ 0 Preview of the Docear Online Viewer http://www.docear.org/2013/03/21/preview-of-the-docear-online-viewer/ http://www.docear.org/2013/03/21/preview-of-the-docear-online-viewer/#comments Thu, 21 Mar 2013 15:06:19 +0000 Joeran [Docear] http://www.docear.org/?p=2484 A few month ago we announced to develop an add-on allowing researchers to collaborate on the same data. Well, we haven’t finished this completely yet but the first step is done. In the past few month we developed an online viewer that allows you to view your backuped mind maps in your web browser. Right now [...]]]> A few month ago we announced to develop an add-on allowing researchers to collaborate on the same data. Well, we haven’t finished this completely yet but the first step is done. In the past few month we developed an online viewer that allows you to view your backuped mind maps in your web browser. Right now the viewer is only capable of displaying very small mind maps but it’s our highest priority to improve the performance so you can also view larger mind maps. In addition, the online viewer displays only the basic elements such as nodes and edges. Other features such as attributes are not yet displayed but, again, we are working on it :-) . Of course, this is just the beginning. As a next step Docear Online will allow you to edit your mind maps online. The following step will enable you to work simultaneously with different researchers on the same data either in your browser or with your desktop version of Docear.

docear online preview

To have a look at the preview version of Docear Online, go to https://my.docear.org and log in with your Docear user name and password. You will be able to view all those mind maps that have been created with the desktop version of Docear and that have been backuped with it. Simply select your mind map in the upper-right corner in the menu. To activate the backup function start Docear Desktop and open Tools->Preferences->Online Services->Manage Docear Service Settings.

Please let us know what you think of Docear Online and what the next most urgent features should be. Finally, give a big ‘thank you’ to the five students from HTW Berlin who developed Docear Online (and who will continue to add more features during the next couple of month).

Try Docear Online

 

]]> http://www.docear.org/2013/03/21/preview-of-the-docear-online-viewer/feed/ 0 Metadata retrieval and recommendations deactivated due to heavy server load http://www.docear.org/2013/03/12/metadata-retrieval-deactivated-heavy-server-load/ http://www.docear.org/2013/03/12/metadata-retrieval-deactivated-heavy-server-load/#comments Tue, 12 Mar 2013 09:22:56 +0000 Joeran [Docear] http://www.docear.org/?p=2472 We are experiencing a very high server load due to several reasons (many people are using our services, we are doing some extensive research analyses, etc.). Therefore we decided to deactivate the metadata retrieval and recommendations for a while, hopefully only a few days. We will let you know as soon as the services are [...]]]> We are experiencing a very high server load due to several reasons (many people are using our services, we are doing some extensive research analyses, etc.). Therefore we decided to deactivate the metadata retrieval and recommendations for a while, hopefully only a few days. We will let you know as soon as the services are available again.

 

UPDATE (April 15th): Service is online again!

]]> http://www.docear.org/2013/03/12/metadata-retrieval-deactivated-heavy-server-load/feed/ 0 Docear4Word 1.01 with bug-fixes and some enhancements http://www.docear.org/2013/02/18/docear4word-1-01-with-bug-fixes-and-some-enhancements/ http://www.docear.org/2013/02/18/docear4word-1-01-with-bug-fixes-and-some-enhancements/#comments Mon, 18 Feb 2013 13:14:10 +0000 Joeran [Docear] http://www.docear.org/?p=2452 Today we released Docear4Word 1.01. The add-on for Microsoft Word allows you to manage your Docear references (and any other references stored as BibTeX) directly within Microsoft Word. Version 1.01 includes the following changes. Download it here!

Added warning message if a BibTex file is considered corrupt, rather than just ignoring it. (#740, #692) BibTex [...]]]> Today we released Docear4Word 1.01. The add-on for Microsoft Word allows you to manage your Docear references (and any other references stored as BibTeX) directly within Microsoft Word. Version 1.01 includes the following changes. Download it here!

  • Added warning message if a BibTex file is considered corrupt, rather than just ignoring it. (#740, #692)
  • BibTex load now also supports CP1252 codepage.
  • Unexpected exceptions now logged to the log file. (#740)
  • Added workaround for missing BibTex keys. We create a new one of the form “_Unknown_XX” where XX increase with each missing key within the file.
  • DEV: Added MLA.csl sample file.
  • Fixed bug where the ID was being used instead of the Name.
  • Made toolbar dropdown wider.
  • Added warning message and instruction when no BibTex database is configured. (#740)
  • Parser now copes with no tags present.
  • Removed paragraph formatting from within Field code as it influence formatting in the main document.
  • JSON is now stored within the Field with space separators and LineFeeds since it could influence formatting in the main document. (#729)
  • Updated Citeproc.js to v1.0.426 which fixed these issues:
    • Incorrect trimming of punctuation. (#743)
    • “Tri-graph” styles not working. (#694)
    • Failure to load some styles containing comments.
  • BibTex Lexer now supports unix line endings. (#692)
  • Issue tag is now supported (#743)
  • Fixed bug with Issue and Number casing.

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