To protect sensitive information in a cross tabulated table, it is a common practice to suppress some of the cells in the table. This paper investigates four levels of data security of a two-dimensional table concerning the effectiveness of this practice. These four levels of data security protect the information contained in, respectively, individual cells, individual rows and columns, several...

This paper provides an answer to the open problem raised by Feldman and Valiant at COLT’08. That is, it is known that concepts classes of conjunctions, disjunctions, linear threshold functions and k-CNF/DNF are evolvable over fixed distributions, but it is unknown whether they are evolvable distribution-independently. Or in other words, whether weak evolvability is equivalent to strong evolvabi...

We derive the coincidence of Lutz’s constructive dimension and Kolmogorov complexity for sets of infinite strings from Levin’s early result on the existence of an optimal left computable cylindrical semi-measure M via simple calculations.

Actovegin is a biological drug that has been used for the treatment of sports muscle injuries. Several in vitro studies have shed light on potential mechanisms of action and the drug has consistently demonstrated its potential to reduce return to injury time for muscle tears in elite athletes. Yet it was banned for a time under the International Olympic Committee (IOC) as a blood doping agent, ...

I discuss a recent application of homotopy perturbation method to a heat transfer problem. I show that the authors make infinity equal five and analyze the consequences of that magic. There has recently been great interest in the application of several approximate procedures, like the homotopy perturbation method (HPM), the Adomian decomposition method (ADM), and the variation iteration method ...