Methods and apparatus are provided for ranking information content based on performance data of prior users of the information content. Data is extracted from multidimensional database, in which it is arranged and stored according to predetermined attributes, representing different measures for each dimension. The driving unit includes a rotatable first lever attached to one end of the connecting rod. An authentication chip is connected to the processing circuitry and is configured to incorporate a random function that generates a random number when called by the processing circuitry and to apply a one-way function to the random number to generate a first value that is passed to the processing circuitry. 33 wt % bentonite clay and a siwak stick powder; and collecting water having a reduced concentration of the heavy metal. A sensor circuit including an integrated circuit is placed in the cavity and a gas fill port on the housing is sealed.