Symbolic Data Analysis is based on a special descriptions of data – symbolic objects. Such descriptions preserve more detailed information about data than the standard representations with mean values. A special kind of symbolic object is also representation with distributions. In the clustering process this representation enables us to consider the variables of all types at the same time. We p...

Introduction: Mental arithmetic analysis based on Electroencephalogram (EEG) signal for monitoring the state of the user’s brain functioning can be helpful for understanding some psychological disorders such as attention deficit hyperactivity disorder, autism spectrum disorder, or dyscalculia where the difficulty in learning or understanding the arithmetic exists. Most mental arithmetic recogni...

A method of hierarchical clustering for relational data is presented, which begins by forming a new square matrix of productmoment correlations between the columns (or rows) of the original data (represented as an n x m matrix). Iterative application of this simple procedure will in general converge to a matrix which may be permuted into the blocked form [_~ -~J. This convergence property may b...

introduction breast cancer is the second cause of mortality among women. early detection of it can enhance the chance of survival. screening systems such as mammography cannot perfectly differentiate between patients and healthy individuals. computer-aided diagnosis can help physicians make a more accurate diagnosis. materials and methods regarding the importance of separating normal and abnorm...

Engineering analysis often involves the accurate numerical solution of boundary value problems in discrete form. Hierarchical quadtree (or octree) grid generation offers an efficient method for the spatial discretisation of arbitrary-shaped two- (or three-) dimensional domains. It consists of recursive algebraic splitting of sub-domains into quadrants (or cubes), leading to an ordered hierarchi...

The use of the web-caching technique has been widely spread out with the objective of reducing the impact of some problems caused by the vertiginous growth of the Internet. The main characteristic of this technique is to keep the objects of the Internet next to the user and consequently, reducing the reply latency and the traffic in the communication channels. An important property of the web-c...