A technique for assembling mosaics on temporary surfaces, such as kraft paper, clear adhesive film, or plastic mesh. The tesserae are stuck face down using a water-soluble adhesive and can be rearranged as desired to create a design. The completed mosaic is then adhered to its permanent base and the temporary surface removed from its face.

adhere tesserae face down on a temporary surface (craft paper) with a temporary glue. When complete apply mortar to the mosaic (back buttering) then flip it onto the final surface, also prepared with mortar. Press the mosaic firmly into the adhesive to get a firm bond, level and when set, remove paper with water. Corrections are easier to make using this method but there are a few drawbacks; the tiles may shift in the process and you must be able to envision the mirror image of the design. You work looking at the back of the tiles, (which are not always the same as the front) therefore you don't really see the upside of the mosaic until you flip it. Very difficult especially for figures as in the example above of Lilian Broca's "Queen Esther". copyright © 2006 Lilian Broca interstice - no grout - marble mosaic detail

Indirect methods of automatic memory management are those in which the information necessary to determine whether an object can be reclaimed is not stored in or associated with that object, but is derived from other objects. Indirect methods detect garbage by tracing reachable objects. Indirect methods cannot always reclaim memory as soon as it becomes dead, because it may be necessary to inspect many other objects to determine this. However, not having to store and update information on each object may reduce the overhead for the collector. In distributed garbage collection, this can reduce the amount of communication between processors. Similar terms: tracing garbage collection. Opposites: direct method. Related publications

(n.) Any technique for solving a system of equations that does not rely on linear algebra directly. Successive over-relaxation is an example of an indirect method. See also direct method.

A method for checking the validity of a sequent in SL. In this method we first assume that the argument is invalid, and proceed to find an invalidating assignment. If this turns out to be impossible, then the argument is valid. Otherwise it is not.

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