A timestamp field included in the federated table definition to link remote tables in the cloud is not affected by the local time zone setting in the user query (See last two queries in below examples.) Thus it has been recommended to use a UNIX timestamp field instead. Today we released new table definitions to resolve this incovenience. The trick is using VIEWs atop federated tables. Now you can use the image_UTC_timestamp field without troubles if you set the time zone properly (See first two of below examples).
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.