Data mining firewall logs : Principal Component Analysis

Posted on by David Vassallo

In this article we'll explore how Principal Component Analysis [PCA] [1] - a popular data reduction technique - can help a busy security or network administrator. Any such administrator has often been faced with a daunting problem... going through reams of firewall or router connection logs trying to figure out if any of the thousands … Continue reading Data mining firewall logs : Principal Component Analysis

Lessons learned : Stopping an android service

Posted on by David Vassallo

Scenario: An android service is running in the background quietly doing it's thing.  When the application is closed, then the service should be stopped to conserve battery life and avoid nasty crashes due to null pointers. Simple right? In the onDestroy() callback of the application, call the stopService() method with the appropriate intent. Did that but the service … Continue reading Lessons learned : Stopping an android service