An integrated circuit is disclosed. The heat spreading layer includes an opening that enables light emitted by an active region to reflect from a distributed Bragg reflector top mirror located above the heat spreading layer. The test method includes closed loop control of the electronically adjustable shock to achieve user-provided damping characteristics. The present acetylated castor components and blends find advantageous application as a plasticizer. The first part may be generated from the symbols transmitted at the end of a data portion of the block, the second part may be generated from the symbols transmitted at the start of the data portion of the block, the third part may be generated from an entire sequence of non-redundant data symbols transmitted in the first half of the data portion of the block.