A system for investigating non-linear properties of a rock formation around a borehole is provided. Such a selective black-holing scheme can be used to allow some traffic to continue in route to the IP address under attack, while other traffic is diverted. This parameter value is passed to a high-level language function, which is used to determine a tailored design architecture in accordance with the specified needs of the target application. The neediness value of a user indicates a degree of assistance by the social networking system to distribute content associated with the user.