Evolution operators of certain quantum walks possess, apart from the continuous part, also point spectrum. The existence of eigenvalues and the corresponding stationary states lead to partial trapping of the walker in the vicinity of the origin. We analyze the stability of this feature for three-state quantum walks on a line subject to homogenous coin deformations. We find two classes of coin o...

This paper represents algorithm for recognition of the coins of different denomination. The proposed system first uses a canny edge detection to generate an edge map, then uses CHT (Circular Hough transform) to recognize the coins and further find the radii of them. Based on the radius of the coin, the coins of different denomination are classified. The experimental result shows that the Hough ...

The automatic identification of coins from photos helps coin experts to accelerate their study of coins and to reduce the associated expenses. To address this challenging problem for numismatic applications, we propose a novel coin identification system that consists of two stages. In the first stage, an active model based segmentation approach extracts precisely the coin from the photo with it...

The common coins in circulation in Pakistan are of denominations 1, 2 and 5 rupees. Rupee 1 coin (composed of bronze and aluminum and brownish in color) and Rupee 2 coin (composed of brass and aluminum and yellowish in color) were issued in September 1998 by State Bank. While rupee 5 coin (composed of copper and nickel and white in color) was issued later in December 2002. These coins, by compo...

Coin which act as the basic need of the human being and today life of human beings depends solely on machines so the detection and recognition of coin is very important rather than counting coins manually. One can easily detect and recognize the coins by using various techniques. This paper focuses on the variety of techniques that have being used to detect and recognize the coins of different ...

Canids are reservoir for some zoonoses helminthic disease. They are one of main public health problem. Theaim of this study was to ascertain frequency of gastrointestinal helminthic infection of stray dogs in Zabol city,southeaster of Iran. In this descriptive study, 30 stray dogs were euthanized, intestine was removed by necropsy.Then, the intestines was opened by scalpel and their contents pa...

Problems of detecting two (or one of two) irregular coins x and y among a set of n coins are considered. The testing device is such that it returns feedback 1 if x belongs to the test set and y does not, while it returns feedback 0 otherwise. We present a lower bound on the worst-case number of tests necessary to nd one of the two irregular coins as well as on the worst-case number of tests to ...

Considered is the set-up of availability of n coins and the possibility of at the most one of these coins being counterfiet in the sense of possessing slightly more or slightly less weight than that of the rest, though all the coins have remarkably identical appearance ! There has been considerable interest in the underlying combinatorial problem of checking the existence of such a coin and ide...

In this paper, given a balance scale and the information that there are exactly two different defective coins present, the authors consider the problem of ascertaining the minimum number of testing which suffice to determine the two different defective coins in a set of k coins in same appearance, and here k P 3. A testing algorithm for all the possible values of k is constructed, and the testi...