In the 1-to-many mode a user presents biometric data such as a fingerprint or retina scan and the reader then compares the live scan to all the templates stored in the memory. This method is preferred by most end-users, because it eliminates the need to carry ID cards or use PINs. On the other hand, this method is slower, because the reader may have to perform thousands of comparison operations until it finds the match. An important technical characteristic of a 1-to-many reader is the number of comparisons that can be performed in one second, which is considered the maximum time that users can wait at a door without noticing a delay. Currently most 1-to-many readers are capable of performing 2,000–3,000 matching operations per second.
When deciding whether to consult with a local medium in person, check for a couple of things before scheduling. Does the person live in a decent or nice neighborhood? If not, that ought to raise questions about her ability to accurately advise clients. While it is common knowledge that mediums, like doctors, do not “treat” themselves due to the subjective nature of self-study, they should be able to boast a reasonable success rate with clients, which means the clients would want to return periodically as well as refer friends and associates. This would lead to significant income for an accurate psychic medium, so that she would be able to afford a comfortable home or office in a pretty good neighborhood. If the home or office appears run-down or quite modest, this may mean the reader is not as accurate as she claims. Not all psychics live in mansions, of course, but successful ones probably reflect an element of status.
The magician Julien Proskauer revealed that the levitating trumpet of Jack Webber was a trick. Close examination of photographs reveal Webber to be holding a telescopic reaching rod attached to the trumpet, and sitters in his séances only believed it to have levitated because the room was so dark they could not see the rod. Webber would cover the rod with crepe paper to disguise its real construction.
A card reader is a data input device that reads data from a card-shaped storage medium. The first were punched card readers, which read the paper or cardboard punched cards that were used during the first several decades of the computer industry to store information and programs for computer systems. Modern card readers are electronic devices that can read plastic cards embedded with either a barcode, magnetic strip, computer chip or another storage medium.