There is disclosed a light amount adjustment apparatus for adjusting a state of a flux passed through an aperture having a predetermined aperture diameter, the apparatus comprising: a light amount adjustment member in which a first region having a predetermined transmittance to the flux and a second region for blocking the flux are disposed on the same base material. The support structure comprises an attachment means for coupling to the apparatus and a support portion configured to be deployed from a first unexpanded condition to a second expanded condition by expansion of the apparatus. 0\xd71017 atomscm3, a resistivity variation within the plane of the wafer of at most 5% and, letting tox be the gate oxide film thickness and S be the electrode surface area when determining the TZDB pass ratio, a density d of crystal originated particles having a size at least twice the gate oxide film thickness which satisfies the formula d\u2266\u2212ln. Some of the slave buffers are referenced by one of the master buffers, but not by another master buffer. Thus, to make the useful debugging information available in heap dumps from production applications without compromising secure client data to those assigned to debugging and fixing production issues, these heap dumps may be scrubbed of sensitive information without scrubbing information that is useful for debugging. A trailer position of a trailer is estimated in accordance with a position solution based on the determined vehicle heading, the hitch length, and the tongue length.