Abstract: This disclosure provides a waveguide including a sequence of variable transparency segments, wherein each variable transparency segment of the sequence of variable transparency segments is configured to vary its transparency by the electromagnetically Induced Transparency (EIT) effect and further vary its transparency in response to an incident electromagnetic field; and a plurality of separator segments interspersed within the sequence of variable transparency segments so that each variable transparency segment: has a first separation distance from a first other variable transparency segment being a first predetermined number of variable transparency segments preceding or succeeding in the sequence of variable transparency segments, has a second separation distance from a second other variable transparency segment being a second predetermined number of variable transparency segments preceding or succeeding in the sequence of variable transparency segments, and is uniquely identified by a combination of separ

Abstract: This disclosure provides a waveguide including a sequence of variable transparency segments, wherein each variable transparency segment of the sequence of variable transparency segments is configured to vary its transparency by the electromagnetically Induced Transparency (EIT) effect and further vary its transparency in response to an incident electromagnetic field; and a plurality of separator segments interspersed within the sequence of variable transparency segments so that each variable transparency segment: has a first separation distance from a first other variable transparency segment being a first predetermined number of variable transparency segments preceding or succeeding in the sequence of variable transparency segments, has a second separation distance from a second other variable transparency segment being a second predetermined number of variable transparency segments preceding or succeeding in the sequence of variable transparency segments, and is uniquely identified by a combination of separ

Abstract: An undergarment includes a lower body portion having a waist opening and a crotch portion. The crotch portion has a skin contact surface and an outer surface and includes a weft knit fabric portion with at least a first predominately cotton yarn. The first yarn has a moisture wicking treatment applied after being knit into the fabric. The weft knit fabric also includes an antimicrobial treatment. The undergarment has improved moisture management and comfort properties.

Abstract: A putter head includes an aperture through which two rails extending across a bottom of the putter head can be viewed. After establishing a target line, the player first levels the rails flat on the putting surface. Then, the player looks down on the putter head and adjusts his position and aligns the putter head in such a manner that a groove on top of the putter is seen as situated/centered between the rails. A slot running parallel to the putting face of the putter head also is used to ensure that the putter head is in proper alignment. Also, the rails are substantially flat to impart additional horizontal stability and alignment to the putter head during putting.