For years the schema theorem has been a principal mathematical foundation for Genetic Algorithms. This article briefly describes a trade-off involving crossover and mutation with respect to schema length. The one-max function, a variant of it, and finding snakes in hypercubes are used to demonstrate this trade-off, looking at the impact on solution quality solution and number of function evalua...

A&M&-A probabilistic method is presented wtdcb cryptanalyzes any N key cryptosystem in N2i3 operations with N2j3 words of memory (average vale) after a precomputatioo which requires N operations. If tke precomputation cao be performed in a reasooable time period (e.g* several years), the additional computation reqoired to recover e& key compares very favorably wltb the N operations reqdred by a...

In this paper a modified Steganography algorithm is proposed. A fuzzification is performed in the message channel to compress the decomposed coefficients before embedding in the cover-image to get a new Stego-image. A relative embedding strength factor (ESF) is used for embedding the secret in the cover-image. The well known metrics (MSE, PSNR, Cor. and Entropy) were used to evaluate quality of...

Durable democracies display a huge variety of combinations of basic institutional formulas. A quantitative logical model shows that while there are multiple equilibrium sets of institutions, each involves some trade-off between the size of the country, the territorial structure of government and the electoral system. Specifically, the larger the country, the more important is federalism in comp...

A formal method to allow designers to explicitly make trade-off decisions is presented. The methodology can be used when an engineer wishes to rate the design by the weakest aspect, or by cooperatively considering the overall performance, or a combination of these strategies. The design problem is formulated with preference rankings, similar to a utility theory or fuzzy sets approach. This appr...