Abstract: This patent describes a human, crowdsourced spambot prevention system that is an alternative to CAPTCHA, and is easy for humans to solve but difficult for bots. Humans submit challenges in the form of pictures and questions and answers that reference those images, and as a reward, when those challenges are presented to user agents, the submitter's link is presented as well, with the intent that there is value for a submitter to have his or her link presented to users.

Abstract: A method and system for visually representing a Pareto frontier includes performing two or more optimizations from different initial points to obtain optimal values for each of two or more objective functions. A minimum value and a maximum value are identified from the optimal values for each of the objective functions to establish a range for each of the objective functions. Each of the ranges is divided into a first number of bins for each of the objective functions and a determination is made about which of the objective functions will be placed on which of at least two axes. Indices of the bins are plotted along the determined of the at least two axes for each of the objective functions. The plotted indices represent the Pareto frontier for the objective functions along the at least two axes are output.

Abstract: An apparatus for analyzing a region below one or more layers of tissue includes a force sensor, a position sensor, and a processing system. The force sensor provides a force signal representative of an amount of force applied to a portion of the one or more layers of tissue which is adjacent to the region. The position sensor provides a position signal representative of the location of the position sensor when the force is applied. The processing system coupled to the force sensor and the position sensor determines at least one property of the region based on the force signal and the position signal.

Abstract: An apparatus for analyzing a region below one or more layers of tissue includes a force sensor, a position sensor, and a processing system. The force sensor provides a force signal representative of an amount of force applied to a portion of the one or more layers of tissue which is adjacent to the region. The position sensor provides a position signal representative of the location of the position sensor when the force is applied. The processing system coupled to the force sensor and the position sensor determines at least one property of the region based on the force signal and the position signal.