If your mother earns more than the personal exemption for the tax year in question ($3,900 in 2013), then she is not eligible to be claimed as a dependent by another individual. Keep in mind that income from Social Security does not count for this purpose.
A lint roller in use. A lint roller or lint remover is a roll of one-sided adhesive paper on a cardboard or plastic barrel that is mounted on a central spindle, with an attached handle. The device facilitates the removal of lint or other small fibers from most materials such as clothing, upholstery and linen. Once expended, the roll can typically be replaced with a refill roll. Invented in 1956 by Nicholas McKay, Sr., his most well-known (and first commercial) product was the Lint Pic-Up, the world's first lint roller. Reusable lint rollers use elastomers, including silicones and polystyrene-ethylene-butylene-styrene as a reusable tacky surface.
In the 1980s, Per Lindstrand and his team introduced the GA-42 airship, the first airship to use fly-by-wire flight control which considerably reduced the pilot's workload. The world's largest thermal airship (300,000 cubic feet; 8,500 cubic metres) was constructed by the Per Lindstrand company for French botanists in 1993.