Given a set of n coins, some of them weighing H, the others weighing h, h < H, we prove that to determine the set of heavy coins, an optimal algorithm requires an average of 1+ρ 1+ρ+ρ n + O(1) comparisons, using a beam balance, in which ρ denotes the ratio of the probabilities of being light and heavy. A simple quasi-optimal algorithm is described. Similar results are derived for the majority p...

Neural networks have been used in the development of intelligent systems that simulate pattern recognition and object identification. Coin identification by machines relies currently on the assessment of the physical parameters of a coin. An intelligent coin identification system that uses coin patterns for identification helps preventing confusion between different coins of similar physical di...

We present the first fair e-cash system with a compact wallet that enables users to spend efficiently k coins while only sending to the merchant O(λ log k) bits, where λ is a security parameter. The best previously known schemes require to transmit data of size at least linear in the number of spent coins. This result is achieved thanks to a new way to use the Batch RSA technique and a tree-bas...

Coins are the vital part of our life. It is used at every point whether it is small cafe or in mall. So it’s our fundamental need to recognize the coins. Image Processing is a field in which working is done on images. By using this, recognition of different denomination of coins is done. For recognition, first canny edge detection is used to detect edges then Hough Transformation is used to det...

This paper presents Treasure, an outdoor mobile multiplayer game inspired by Weiser’s notion of seams, gaps and breaks in different media. Playing Treasure involves movement in and out of a wi-fi network, using PDAs to pick up virtual ‘coins’ that may be scattered outside network coverage. Coins have to be uploaded to a server to gain game points, and players can collaborate with teammates to d...

The fascinatingly wide range which the historical studies and generalizations of D. D. Kosambi cover is known to all his readers and it is indeed a measure of his great versatility that in no other area was the relationship between his ‘basic’ discipline and history as direct as in the study of coins. A Professor of Mathematics all through his teaching career and an acknowledged original contri...

The current study evaluated the effects of conditional discrimination (listener) training with coins on the emergence of novel stimulus relations, textual behavior, tacts, and intraverbals. Two preschoolers with autism were taught 3 relations among coins, their names, and values. After initial training, 4 relations emerged for the first participant and 7 for the second participant, suggesting t...