The eLog library was initially developed as a research prototype and later published for lifelogging researchers in 2010 to help them easily analyze heterogenous data and complex visualization. It has been kept growing with the progress of mobile computing environments and recently its UI part is released with GPL v3 license for wider usage. The eLog UI library is optimized for mobile environment and can get easily integrated with existing Web services.

Who We Are

The original work was proposed by Pil Ho and later extended the work with collaboration with 28 researchers around the world who contributed their lifelogs, collaborated for lifelog analysis and share research results to build up an open lifelogging platform for the public. Pil Ho has been keeping the development updating the library following up the progress in mobile computing.


  • Nov. 2014: Change the web page skin using bootstrap.
  • Nov. 2014: Published elog UI library as GPL v3.
  • Oct. 2014: Version up eLog library and documentation.


jsduck modification for YouTube video support

JSDuck supports video tutorial pages but it is limited to vimeo server. We extended its supports to YouTube with a simple script based on https://developers.google.com/youtube/player_parameters. Our method is shown below. In this example, video quality is set to 'hd1080'. You may change it to other quality (See http://stackoverflow.com/questions/20868257/youtube-link-to-display-hd-video-by-default)
cp ../elog_doc/server/1.0/app.js ../elog_doc/server/1.0/app.js.bak
sed 's/http\:\/\/vimeo.com\/moogaloop.swf\?clip\_id={id}&server=vimeo.com&color=4CC208&fullscreen=1/https\:\/\/www.youtube.com\/v\/\{id\}\?version=3\&autoplay=1\&vq=hd1080/g' < ../elog_doc/integrated/1.0/app.js.bak > ../elog_doc/integrated/1.0/app.js
You can also change the size of embedded video player using the below example:
cp ../elog_doc/server/1.0/app.js ../elog_doc/integrated/1.0/app.js.bak
sed 's/width="640" height="360"/width="800" height="450"/g' < ../elog_doc/integrated/1.0/app.js.bak > ../elog_doc/integrated/1.0/app.js
YouTube video thumbnail address can be obtained from the YouTube site (See http://stackoverflow.com/questions/2068344/how-do-i-get-a-youtube-video-thumbnail-from-the-youtube-api). Our example item to put in video.json is shown below.
    "name": "eLogCEPEditor",
   "title": "eLog CEP Editor",
   "description": "Complex event pattern editor",
   "id": "AIHFc6K_pr0",
   "thumb": "http://img.youtube.com/vi/AIHFc6K_pr0/0.jpg"