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A coupon or test coupon is a printed circuit board (PCB) used to test the quality of a printed wiring board (PWB) fabrication process. Test coupons are fabricated on the same panel as the PWBs, typically at the edges. Coupons are then inspected to ensure proper layer alignment, electrical connectivity, and cross sectioned to inspect internal ...
Two used Accu-Chek test strips. The lower one has had the cover peeled off to show the circuit. Many glucose meters employ the oxidation of glucose to gluconolactone catalyzed by glucose oxidase (sometimes known as GOx). Others use a similar reaction catalysed instead by another enzyme, glucose dehydrogenase (GDH). This has the advantage of ...
Extreme couponing is an activity that combines shopping skills with couponing in an attempt to save as much money as possible while accumulating the most groceries. The concept of "extreme couponers" was first mentioned by The Wall Street Journal on March 8, 2010, in an article entitled "Hard Times Turn Coupon Clipping Into the Newest Extreme Sport". [2]
Zero coupon bonds have a duration equal to the bond's time to maturity, which makes them sensitive to any changes in the interest rates. Investment banks or dealers may separate coupons from the principal of coupon bonds, which is known as the residue, so that different investors may receive the principal and each of the coupon payments.
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