The Karma system is currently undergoing maintenance (Monday, January 29, 2018).
The maintenance period has been extended to 8PM EST.

Karma Credits will not be available for redeeming during maintenance.

E-collection 'Viewpoint'

Opinion Articles or papers which would not otherwise qualify as "original papers", because they do not have much original data, but would also not qualify as reviews, because they are based on personal experiences, workshop results, etc.