Abstract: Provided herein are systems and methods for storing digital information by assembling an identifier nucleic acid molecule from at least a first component nucleic acid molecule and a second component nucleic acid molecule. The system may include a first printhead configured to dispense a first droplet of a first solution comprising the first component nucleic acid molecule onto a coordinate on a substrate, and a second printhead configured to dispense a second droplet of a second solution comprising the second component nucleic acid molecule onto the coordinate on the substrate, such that the first and second component nucleic acid molecules are collocated on the substrate. The system may include a finisher that dispenses a reaction mix onto the coordinate on the substrate to physically link the first and second component nucleic acid molecules, provides a condition necessary to physically link the first and second component nucleic acid molecules, or both.

Abstract: Method and apparatus for determining a concentration coefficient for an asset portfolio. The concentration coefficient is determined according to the inverse of the sum of the squares of the weights of each holding in the portfolio, and expresses portfolio concentration as an equivalent number of equal-weighted holdings. In this manner, a balanced portfolio that is not weighted toward any particular holding or security is already relatively equally-weighted, and its concentration coefficient will approach the number of holdings it has. Conversely, a portfolio concentrated in few holdings will have a concentration coefficient that is lower than the number of holdings in the portfolio. Accordingly, a concentration coefficient value significantly lower than the total number of holdings generally indicates a more “concentrated” portfolio, while a concentration coefficient value approaching the total number of holdings of a portfolio indicates that the portfolio is not concentrated, and relatively “balanced.