/ebooks/selected-papers-in-digital-signal-processing-ii-ieee-press-selected-reprint-series-vol-2
  (8) Undefined index: host   FrontController.php   line 87     18-7-18   16:44
FrontController->getInstance() # line   16, file: /home/smart/public_html/index.php
  FrontController->__construct() # line   37, file: /home/smart/public_html/core/FrontController.php
    FrontController->loadSettings() # line   51, file: /home/smart/public_html/core/FrontController.php