An example of a Roofline model in its basic form. As the image shows, the curve consists of two platform-specific performance ceilings: the processor's peak performance and a ceiling derived from the memory bandwidth.
1Numismatics is the official term for coin collecting. Apart from coins, it also refers to the collection and study of paper currency and tokens. A coin collector can be called a numismatist. 2What we call the âpennyâ is actually a misnomer which is really named the cent. Donât let a true collector hear you say the word âpennyâ! 3From the years 1850 â 1873, the US minted a 3 cent silver piece.
Quick Answer. A numismatist is a person who collects coins. Coin collectors value a coin based primarily on its date, condition and place of origin. Coins that contain production errors also carry a high value for collectors. Collectors may value a coin from between a couple cents to over $10,000. Rare coins that were produced in small numbers are generally worth more than coins intended exclusively for circulation. Older coins are worth more than newer coins. Coin collectors grade coin condition on a scale, with the most valuable coins rated as uncirculated. Coins that have been worn down or damaged command a lower price.