-the cowpea aphid, aphis craccivora koch, is an important pest of robinia pseudoacacia frisia. life table parameters of a. craccivora were determined under natural (16- 33ºc and 32-89% rh, respectively) and laboratory (25 ± 1ºc, rh of 70 ± 5% and a photoperiod of 16:8 h (l: d) conditions. the data were analyzed using the age-stage, two-sex life table theory. each experiment was replicated 45 ti...

In the late sixties F. W. LAWVERE showed that the logical connectives and quantifiers were examples of the categorical notion of adjointness. In [9] and [lo] he amplified this notion by a more thorough discussion of the structure of a hyperdoctrine, which had much of the flavour of intuitionistic logic with equality. In this eontext it was natural to “stratify” formulae and proofs according to ...

A premonoidal category is equipped only with a bifunctor and a natural isomorphism for associativity. We introduce a (deformation) natural automorphism, q, representing the deviation from the Pentagon condition. We uncover a binary tree representation for all diagrams involving a and q and provide a link to permutations and linear orderings. This leads to other notions of premonoidalness. We de...

Natural pavements are an important element of flights. Among other things, they allow the plane to be safely slowed down after it has exited runway. For this reason, load bearing capacity natural airfield and strength turf layer at a specified level required. Currently used testing methods, such as CBR (Californian Bearing Ratio) tests or probe test, separately do not give full image pavement t...