In an optical transmission link having discrete optical reflection sources that cause multi path interference and optical return loss, a method determines how to reduce to beneath a predetermined threshold, a predetermined phenomenon. The scintillating crystal is based on cerium doped lutetium yttrium orthosilicate. Upon detecting a cache miss for a second page, if the stable history list contains metadata for the second page, then removing the second page metadata from the stable history list and applying a promotion determination for the second page to determine a priority value for the second page metadata and placing the second page in the cache memory based on the priority data. An embodiment of the mask would allow the main frame to be reusable, by having means for snapping a disposable filter onto the frame. Use of absolute transformations to develop the connection matrix allows a first animation sequence to be interrupted at any arbitrary point and immediately, smoothly followed by a second animation sequence. The second housing can be rotated from a closed position to an opened position, and vice versa.