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Constrained optimization problems are problems for which a function f (x) is to be minimized or maximized subject to constraints ? (x) . Here f : Rn ? R is called the objective function and F(x) is a Boolean-valued formula. In Mathematica the constraints ? (x) can be an arbitrary Boolean combination of equations g (x) ?0 , weak inequalities g (x) >=0, strict inequalities g(x)> 0, x is integer and x>0 statements. A point u ? Rn is said to be a global minimum of f subject to constraints F if u satisfies the constrai...

During the four years 2013 ? 2016 structural changes in top-soil in silage maize monoculture were evaluated. Soil condition was evaluated according to the structure coefficient (SC) and the stability of soil aggregate, i.e. its ability to resist degradation. The experiment was established in sugar beet growing region of Czech Republic on Carbonate Chernozem, clay loamy textured. Monitoring was carried out in three variants with different dose of applied compost: Variant 1 ? Control, without compost; Variant 2 ? Co...

The totality of all that is human-made: technical devices and systems, cities, houses, roads and all that humans have constructed to keep them alive on the planet are called the technosphere. The technosphere though is a relatively new phenomenon is evolving extraordinarily rapidly and its mass has been estimated to approximate to 30 trillion tons. Currently the weight of all that man creates in a year is an order of magnitude greater than the mass of wild living organisms (biomass). Thus, our civilization faces v...