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2. List of aperiodic sets of tiles - Wikipedia

   en.wikipedia.org/.../List_of_aperiodic_sets_of_tiles

   A tiling that cannot be constructed from a single primitive cell is called nonperiodic. If a given set of tiles allows only nonperiodic tilings, then this set of tiles is called aperiodic. [3] The tilings obtained from an aperiodic set of tiles are often called aperiodic tilings, though strictly speaking it is the tiles themselves that are ...

3. Aperiodic tiling - Wikipedia

   en.wikipedia.org/wiki/Aperiodic_tiling

   Robinson proves these tiles must form this structure inductively; in effect, the tiles must form blocks which themselves fit together as larger versions of the original tiles, and so on. This idea – of finding sets of tiles that can only admit hierarchical structures – has been used in the construction of most known aperiodic sets of tiles ...

4. Sandwich-structured composite - Wikipedia

   en.wikipedia.org/wiki/Sandwich-structured_composite

   Sandwich structures can be widely used in sandwich panels, with different types such as FRP sandwich panel, aluminium composite panel, etc. FRP polyester reinforced composite honeycomb panel (sandwich panel) is made of polyester reinforced plastic, multi-axial high-strength glass fiber and PP honeycomb panel in special antiskid tread pattern ...

5. Encaustic tile - Wikipedia

   en.wikipedia.org/wiki/Encaustic_tile

   The pattern appears inlaid into the body of the tile, so that the design remains as the tile is worn down. Encaustic tiles may be glazed or unglazed and the inlay may be as shallow as 1 ⁄ 8 inch (3 mm), as is often the case with "printed" encaustic tile from the later medieval period, or as deep as 1 ⁄ 4 in (6.4 mm).

6. Vinyl composition tile - Wikipedia

   en.wikipedia.org/wiki/Vinyl_composition_tile

   Vinyl floor tiling. Vinyl composition tile (VCT) is a finished flooring material used primarily in commercial and institutional applications. Modern vinyl floor tiles and sheet flooring and versions of those products sold since the early 1980s are composed of colored polyvinyl chloride (PVC) chips formed into solid sheets of varying thicknesses (1 ⁄ 8 in or 3.2 mm is most common) by heat and ...

7. Congress members urge Biden to exonerate Black civil rights ...

   www.aol.com/congress-members-urge-biden...

   A group of 21 House Democrats signed a letter urging the president to exonerate former civil rights leader Marcus Garvey, according to a statement sent by the lawmakers to ABC News on Monday.