We study the expansion of stable structures by adding predicates for arbitrary subsets. Generalizing work of Poizat-Bouscaren on the one hand and Baldwin-BenediktCasanovas-Ziegler on the other we provide a sufficient condition (Theorem 4.7) for such an expansion to be stable. This generalization weakens the original definitions in two ways: dealing with arbitrary subsets rather than just submod...

We introduce the concept of orbit-homogeneity of permutation groups: a group G is orbit thomogeneous if two sets of cardinality t lie in the same orbit of G whenever their intersections with each G-orbit have the same cardinality. For transitive groups, this coincides with the usual notion of t-homogeneity. This concept is also compatible with the idea of partition transitivity introduced by Ma...

The focus of this study was on the effect channel angle stress distribution in material aluminum alloy 5083. mechanical properties a mate- rial are related to grain size. Equal angular pressing (ECAP) is method for deforming materials such way that strong prop- erties formed while dimensions work piece stay fixed order make ultra-fine-grained materials. One parameters ECAP angle. It’s crucial u...

The generation of structural color from wrinkled polydimethylsiloxane (PDMS) surfaces, fabricated by plasma exposure, subjected to uni- and multi-axial, sequential strain fields is examined. approach based on the well-known, mechanically-induced, buckling instability a supported bilayer, whereby top glassy “skin” formed oxidation. Surface periodicities 200 nm ≲ d 3 μm, encompassing visible spec...

Porcine reproductive and respiratory syndrome virus (PRRSV) is the causative agent of the, probably, most economically important disease for pig industry worldwide. This disease, characterised by producing failure in sows problems growing pigs, appeared late 1980s United States Canada. Since its appearance, strains capable higher mortality rates as well greater severity clinical signs lesions t...